Adding upstream version 252.22.upstream/252.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

57 files changed, 10869 insertions, 0 deletions

diff --git a/src/network/netdev/bareudp.c b/src/network/netdev/bareudp.c
new file mode 100644
index 0000000..24d3afb
--- /dev/null
+++ b/src/network/netdev/bareudp.c
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "bareudp.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "string-table.h"
+
+static const char* const bare_udp_protocol_table[_BARE_UDP_PROTOCOL_MAX] = {
+        [BARE_UDP_PROTOCOL_IPV4]    = "ipv4",
+        [BARE_UDP_PROTOCOL_IPV6]    = "ipv6",
+        [BARE_UDP_PROTOCOL_MPLS_UC] = "mpls-uc",
+        [BARE_UDP_PROTOCOL_MPLS_MC] = "mpls-mc",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bare_udp_protocol, BareUDPProtocol);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bare_udp_iftype, bare_udp_protocol, BareUDPProtocol,
+                         "Failed to parse EtherType=");
+
+static int netdev_bare_udp_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        BareUDP *u;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        u = BAREUDP(netdev);
+
+        assert(u);
+
+        r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_ETHERTYPE, htobe16(u->iftype));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_PORT, htobe16(u->dest_port));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_bare_udp_verify(NetDev *netdev, const char *filename) {
+        BareUDP *u;
+
+        assert(netdev);
+        assert(filename);
+
+        u = BAREUDP(netdev);
+
+        assert(u);
+
+        if (u->dest_port == 0)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: BareUDP DesinationPort= is not set. Ignoring.", filename);
+
+        if (u->iftype == _BARE_UDP_PROTOCOL_INVALID)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: BareUDP EtherType= is not set. Ignoring.", filename);
+
+        return 0;
+}
+
+static void bare_udp_init(NetDev *netdev) {
+        BareUDP *u;
+
+        assert(netdev);
+
+        u = BAREUDP(netdev);
+
+        assert(u);
+
+        u->iftype = _BARE_UDP_PROTOCOL_INVALID;
+}
+
+const NetDevVTable bare_udp_vtable = {
+        .object_size = sizeof(BareUDP),
+        .sections = NETDEV_COMMON_SECTIONS "BareUDP\0",
+        .init = bare_udp_init,
+        .config_verify = netdev_bare_udp_verify,
+        .fill_message_create = netdev_bare_udp_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_NONE,
+};
diff --git a/src/network/netdev/bareudp.h b/src/network/netdev/bareudp.h
new file mode 100644
index 0000000..8d8863c
--- /dev/null
+++ b/src/network/netdev/bareudp.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+#pragma once
+
+typedef struct BareUDP BareUDP;
+
+#include <linux/if_ether.h>
+
+#include "conf-parser.h"
+#include "netdev.h"
+
+typedef enum BareUDPProtocol {
+        BARE_UDP_PROTOCOL_IPV4    = ETH_P_IP,
+        BARE_UDP_PROTOCOL_IPV6    = ETH_P_IPV6,
+        BARE_UDP_PROTOCOL_MPLS_UC = ETH_P_MPLS_UC,
+        BARE_UDP_PROTOCOL_MPLS_MC = ETH_P_MPLS_MC,
+        _BARE_UDP_PROTOCOL_MAX,
+        _BARE_UDP_PROTOCOL_INVALID = -EINVAL,
+} BareUDPProtocol;
+
+struct BareUDP {
+        NetDev meta;
+
+        BareUDPProtocol iftype;
+        uint16_t dest_port;
+};
+
+DEFINE_NETDEV_CAST(BAREUDP, BareUDP);
+extern const NetDevVTable bare_udp_vtable;
+
+const char *bare_udp_protocol_to_string(BareUDPProtocol d) _const_;
+BareUDPProtocol bare_udp_protocol_from_string(const char *d) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_bare_udp_iftype);
diff --git a/src/network/netdev/batadv.c b/src/network/netdev/batadv.c
new file mode 100644
index 0000000..7e97619
--- /dev/null
+++ b/src/network/netdev/batadv.c
@@ -0,0 +1,216 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <inttypes.h>
+#include <netinet/in.h>
+#include <linux/genetlink.h>
+#include <linux/if_arp.h>
+
+#include "batadv.h"
+#include "fileio.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+
+static void batadv_init(NetDev *n) {
+        BatmanAdvanced *b;
+
+        b = BATADV(n);
+
+        /* Set defaults */
+        b->aggregation            = true;
+        b->gateway_bandwidth_down = 10000;
+        b->gateway_bandwidth_up   = 2000;
+        b->bridge_loop_avoidance  = true;
+        b->distributed_arp_table  = true;
+        b->fragmentation          = true;
+        b->hop_penalty            = 15;
+        b->originator_interval    = 1000;
+        b->routing_algorithm      = BATADV_ROUTING_ALGORITHM_BATMAN_V;
+}
+
+static const char* const batadv_gateway_mode_table[_BATADV_GATEWAY_MODE_MAX] = {
+        [BATADV_GATEWAY_MODE_OFF]    = "off",
+        [BATADV_GATEWAY_MODE_CLIENT] = "client",
+        [BATADV_GATEWAY_MODE_SERVER] = "server",
+};
+
+static const char* const batadv_routing_algorithm_table[_BATADV_ROUTING_ALGORITHM_MAX] = {
+        [BATADV_ROUTING_ALGORITHM_BATMAN_V]  = "batman-v",
+        [BATADV_ROUTING_ALGORITHM_BATMAN_IV] = "batman-iv",
+};
+
+static const char* const batadv_routing_algorithm_kernel_table[_BATADV_ROUTING_ALGORITHM_MAX] = {
+        [BATADV_ROUTING_ALGORITHM_BATMAN_V]  = "BATMAN_V",
+        [BATADV_ROUTING_ALGORITHM_BATMAN_IV] = "BATMAN_IV",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(batadv_gateway_mode, BatadvGatewayModes);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_batadv_gateway_mode, batadv_gateway_mode, BatadvGatewayModes,
+                         "Failed to parse GatewayMode=");
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(batadv_routing_algorithm, BatadvRoutingAlgorithm);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_batadv_routing_algorithm, batadv_routing_algorithm, BatadvRoutingAlgorithm,
+                         "Failed to parse RoutingAlgorithm=");
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(batadv_routing_algorithm_kernel, BatadvRoutingAlgorithm);
+
+int config_parse_badadv_bandwidth (
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint64_t k;
+        uint32_t *bandwidth = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_size(rvalue, 1000, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        if (k/1000/100 > UINT32_MAX)
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "The value of '%s=', is outside of 0...429496729500000 range: %s",
+                           lvalue, rvalue);
+
+        *bandwidth = k/1000/100;
+
+        return 0;
+}
+
+/* callback for batman netdev's parameter set */
+static int netdev_batman_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "BATADV parameters could not be set: %m");
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "BATADV parameters set success");
+
+        return 1;
+}
+
+static int netdev_batadv_post_create_message(NetDev *netdev, sd_netlink_message *message) {
+        BatmanAdvanced *b;
+        int r;
+
+        assert_se(b = BATADV(netdev));
+
+        r = sd_netlink_message_append_u32(message, BATADV_ATTR_MESH_IFINDEX, netdev->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_GW_MODE, b->gateway_mode);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_AGGREGATED_OGMS_ENABLED, b->aggregation);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED, b->bridge_loop_avoidance);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED, b->distributed_arp_table);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_FRAGMENTATION_ENABLED, b->fragmentation);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(message, BATADV_ATTR_HOP_PENALTY, b->hop_penalty);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(message, BATADV_ATTR_ORIG_INTERVAL, DIV_ROUND_UP(b->originator_interval, USEC_PER_MSEC));
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(message, BATADV_ATTR_GW_BANDWIDTH_DOWN, b->gateway_bandwidth_down);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(message, BATADV_ATTR_GW_BANDWIDTH_UP, b->gateway_bandwidth_up);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_batadv_post_create(NetDev *netdev, Link *link) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
+        int r;
+
+        assert(netdev);
+
+        r = sd_genl_message_new(netdev->manager->genl, BATADV_NL_NAME, BATADV_CMD_SET_MESH, &message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m");
+
+        r = netdev_batadv_post_create_message(netdev, message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, message, netdev_batman_set_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not send netlink message: %m");
+
+        netdev_ref(netdev);
+
+        return r;
+}
+
+static int netdev_batadv_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        BatmanAdvanced *b;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        b = BATADV(netdev);
+        assert(b);
+
+        r = sd_netlink_message_append_string(m, IFLA_BATADV_ALGO_NAME, batadv_routing_algorithm_kernel_to_string(b->routing_algorithm));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+const NetDevVTable batadv_vtable = {
+        .object_size = sizeof(BatmanAdvanced),
+        .init = batadv_init,
+        .sections = NETDEV_COMMON_SECTIONS "BatmanAdvanced\0",
+        .fill_message_create = netdev_batadv_fill_message_create,
+        .post_create = netdev_batadv_post_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/batadv.h b/src/network/netdev/batadv.h
new file mode 100644
index 0000000..f1f9b46
--- /dev/null
+++ b/src/network/netdev/batadv.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#pragma once
+
+#include <linux/batman_adv.h>
+
+#include "conf-parser.h"
+#include "netdev.h"
+
+#define BATADV_GENL_NAME "batadv"
+
+typedef enum BatadvGatewayModes {
+        BATADV_GATEWAY_MODE_OFF = BATADV_GW_MODE_OFF,
+        BATADV_GATEWAY_MODE_CLIENT = BATADV_GW_MODE_CLIENT,
+        BATADV_GATEWAY_MODE_SERVER = BATADV_GW_MODE_SERVER,
+        _BATADV_GATEWAY_MODE_MAX,
+        _BATADV_GATEWAY_MODE_INVALID = -EINVAL,
+} BatadvGatewayModes;
+
+typedef enum BatadvRoutingAlgorithm {
+        BATADV_ROUTING_ALGORITHM_BATMAN_V,
+        BATADV_ROUTING_ALGORITHM_BATMAN_IV,
+        _BATADV_ROUTING_ALGORITHM_MAX,
+        _BATADV_ROUTING_ALGORITHM_INVALID = -EINVAL,
+} BatadvRoutingAlgorithm;
+
+typedef struct Batadv {
+        NetDev meta;
+
+        BatadvGatewayModes gateway_mode;
+        uint32_t gateway_bandwidth_down;
+        uint32_t gateway_bandwidth_up;
+        uint8_t hop_penalty;
+        BatadvRoutingAlgorithm routing_algorithm;
+        usec_t originator_interval;
+        bool aggregation;
+        bool bridge_loop_avoidance;
+        bool distributed_arp_table;
+        bool fragmentation;
+} BatmanAdvanced;
+
+DEFINE_NETDEV_CAST(BATADV, BatmanAdvanced);
+extern const NetDevVTable batadv_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_batadv_gateway_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_batadv_routing_algorithm);
+CONFIG_PARSER_PROTOTYPE(config_parse_badadv_bandwidth);
diff --git a/src/network/netdev/bond.c b/src/network/netdev/bond.c
new file mode 100644
index 0000000..601bff0
--- /dev/null
+++ b/src/network/netdev/bond.c
@@ -0,0 +1,457 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "alloc-util.h"
+#include "bond.h"
+#include "bond-util.h"
+#include "conf-parser.h"
+#include "ether-addr-util.h"
+#include "extract-word.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "string-table.h"
+
+/*
+ * Number of seconds between instances where the bonding
+ * driver sends learning packets to each slaves peer switch
+ */
+#define LEARNING_PACKETS_INTERVAL_MIN_SEC       (1 * USEC_PER_SEC)
+#define LEARNING_PACKETS_INTERVAL_MAX_SEC       (0x7fffffff * USEC_PER_SEC)
+
+/* Number of IGMP membership reports to be issued after
+ * a failover event.
+ */
+#define RESEND_IGMP_MIN           0
+#define RESEND_IGMP_MAX           255
+#define RESEND_IGMP_DEFAULT       1
+
+/*
+ * Number of packets to transmit through a slave before
+ * moving to the next one.
+ */
+#define PACKETS_PER_SLAVE_MIN     0
+#define PACKETS_PER_SLAVE_MAX     65535
+#define PACKETS_PER_SLAVE_DEFAULT 1
+
+/*
+ * Number of peer notifications (gratuitous ARPs and
+ * unsolicited IPv6 Neighbor Advertisements) to be issued after a
+ * failover event.
+ */
+#define GRATUITOUS_ARP_MIN        0
+#define GRATUITOUS_ARP_MAX        255
+#define GRATUITOUS_ARP_DEFAULT    1
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_mode, bond_mode, BondMode, "Failed to parse bond mode");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_xmit_hash_policy,
+                         bond_xmit_hash_policy,
+                         BondXmitHashPolicy,
+                         "Failed to parse bond transmit hash policy");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_lacp_rate, bond_lacp_rate, BondLacpRate, "Failed to parse bond lacp rate");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_ad_select, bond_ad_select, BondAdSelect, "Failed to parse bond AD select");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_fail_over_mac, bond_fail_over_mac, BondFailOverMac, "Failed to parse bond fail over MAC");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_arp_validate, bond_arp_validate, BondArpValidate, "Failed to parse bond arp validate");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_arp_all_targets, bond_arp_all_targets, BondArpAllTargets, "Failed to parse bond Arp all targets");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_primary_reselect, bond_primary_reselect, BondPrimaryReselect, "Failed to parse bond primary reselect");
+
+static int netdev_bond_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Bond *b;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        b = BOND(netdev);
+
+        assert(b);
+
+        if (b->mode != _NETDEV_BOND_MODE_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_MODE, b->mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->xmit_hash_policy != _NETDEV_BOND_XMIT_HASH_POLICY_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_XMIT_HASH_POLICY, b->xmit_hash_policy);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->lacp_rate != _NETDEV_BOND_LACP_RATE_INVALID &&
+            b->mode == NETDEV_BOND_MODE_802_3AD) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_AD_LACP_RATE, b->lacp_rate);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->miimon != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_MIIMON, b->miimon / USEC_PER_MSEC);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->downdelay != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_DOWNDELAY, b->downdelay / USEC_PER_MSEC);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->updelay != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_UPDELAY, b->updelay / USEC_PER_MSEC);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->arp_interval != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_INTERVAL, b->arp_interval / USEC_PER_MSEC);
+                if (r < 0)
+                        return r;
+
+                if (b->lp_interval >= LEARNING_PACKETS_INTERVAL_MIN_SEC &&
+                    b->lp_interval <= LEARNING_PACKETS_INTERVAL_MAX_SEC) {
+                        r = sd_netlink_message_append_u32(m, IFLA_BOND_LP_INTERVAL, b->lp_interval / USEC_PER_SEC);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        if (b->ad_select != _NETDEV_BOND_AD_SELECT_INVALID &&
+            b->mode == NETDEV_BOND_MODE_802_3AD) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_AD_SELECT, b->ad_select);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->fail_over_mac != _NETDEV_BOND_FAIL_OVER_MAC_INVALID &&
+            b->mode == NETDEV_BOND_MODE_ACTIVE_BACKUP) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_FAIL_OVER_MAC, b->fail_over_mac);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->arp_validate != _NETDEV_BOND_ARP_VALIDATE_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_VALIDATE, b->arp_validate);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->arp_all_targets != _NETDEV_BOND_ARP_ALL_TARGETS_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_ARP_ALL_TARGETS, b->arp_all_targets);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->primary_reselect != _NETDEV_BOND_PRIMARY_RESELECT_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_PRIMARY_RESELECT, b->primary_reselect);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->resend_igmp <= RESEND_IGMP_MAX) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_RESEND_IGMP, b->resend_igmp);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->packets_per_slave <= PACKETS_PER_SLAVE_MAX &&
+            b->mode == NETDEV_BOND_MODE_BALANCE_RR) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_PACKETS_PER_SLAVE, b->packets_per_slave);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->num_grat_arp <= GRATUITOUS_ARP_MAX) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_NUM_PEER_NOTIF, b->num_grat_arp);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->min_links != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_BOND_MIN_LINKS, b->min_links);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->ad_actor_sys_prio != 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_BOND_AD_ACTOR_SYS_PRIO, b->ad_actor_sys_prio);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->ad_user_port_key != 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_BOND_AD_USER_PORT_KEY, b->ad_user_port_key);
+                if (r < 0)
+                        return r;
+        }
+
+        if (!ether_addr_is_null(&b->ad_actor_system)) {
+                r = sd_netlink_message_append_ether_addr(m, IFLA_BOND_AD_ACTOR_SYSTEM, &b->ad_actor_system);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_BOND_ALL_SLAVES_ACTIVE, b->all_slaves_active);
+        if (r < 0)
+                return r;
+
+        if (b->tlb_dynamic_lb >= 0) {
+                r = sd_netlink_message_append_u8(m, IFLA_BOND_TLB_DYNAMIC_LB, b->tlb_dynamic_lb);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->arp_interval > 0 && !ordered_set_isempty(b->arp_ip_targets)) {
+                void *val;
+                int n = 0;
+
+                r = sd_netlink_message_open_container(m, IFLA_BOND_ARP_IP_TARGET);
+                if (r < 0)
+                        return r;
+
+                ORDERED_SET_FOREACH(val, b->arp_ip_targets) {
+                        r = sd_netlink_message_append_u32(m, n++, PTR_TO_UINT32(val));
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(m);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int config_parse_arp_ip_target_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Bond *b = userdata;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (isempty(rvalue)) {
+                b->arp_ip_targets = ordered_set_free(b->arp_ip_targets);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *n = NULL;
+                union in_addr_union ip;
+
+                r = extract_first_word(&p, &n, NULL, 0);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse Bond ARP IP target address, ignoring assignment: %s",
+                                   rvalue);
+                        return 0;
+                }
+                if (r == 0)
+                        return 0;
+
+                r = in_addr_from_string(AF_INET, n, &ip);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Bond ARP IP target address is invalid, ignoring assignment: %s", n);
+                        continue;
+                }
+
+                if (ordered_set_size(b->arp_ip_targets) >= NETDEV_BOND_ARP_TARGETS_MAX) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Too many ARP IP targets are specified. The maximum number is %d. Ignoring assignment: %s",
+                                   NETDEV_BOND_ARP_TARGETS_MAX, n);
+                        continue;
+                }
+
+                r = ordered_set_ensure_put(&b->arp_ip_targets, NULL, UINT32_TO_PTR(ip.in.s_addr));
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r == -EEXIST)
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Bond ARP IP target address is duplicated, ignoring assignment: %s", n);
+                if (r < 0)
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to store bond ARP IP target address '%s', ignoring assignment: %m", n);
+        }
+}
+
+int config_parse_ad_actor_sys_prio(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+        Bond *b = userdata;
+        uint16_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou16(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse actor system priority '%s', ignoring: %m", rvalue);
+                return 0;
+        }
+
+        if (v == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Failed to parse actor system priority '%s'. Range is [1,65535], ignoring.",
+                           rvalue);
+                return 0;
+        }
+
+        b->ad_actor_sys_prio = v;
+
+        return 0;
+}
+
+int config_parse_ad_user_port_key(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+        Bond *b = userdata;
+        uint16_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou16(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse user port key '%s', ignoring: %m", rvalue);
+                return 0;
+        }
+
+        if (v > 1023) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Failed to parse user port key '%s'. Range is [0…1023], ignoring.", rvalue);
+                return 0;
+        }
+
+        b->ad_user_port_key = v;
+
+        return 0;
+}
+
+int config_parse_ad_actor_system(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+        Bond *b = userdata;
+        struct ether_addr n;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = parse_ether_addr(rvalue, &n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Not a valid MAC address %s. Ignoring assignment: %m",
+                           rvalue);
+                return 0;
+        }
+        if (ether_addr_is_null(&n) || (n.ether_addr_octet[0] & 0x01)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Not an appropriate MAC address %s, cannot be null or multicast. Ignoring assignment.",
+                           rvalue);
+                return 0;
+        }
+
+        b->ad_actor_system = n;
+
+        return 0;
+}
+
+static void bond_done(NetDev *netdev) {
+        Bond *b;
+
+        assert(netdev);
+        b = BOND(netdev);
+        assert(b);
+
+        ordered_set_free(b->arp_ip_targets);
+}
+
+static void bond_init(NetDev *netdev) {
+        Bond *b;
+
+        assert(netdev);
+
+        b = BOND(netdev);
+
+        assert(b);
+
+        b->mode = _NETDEV_BOND_MODE_INVALID;
+        b->xmit_hash_policy = _NETDEV_BOND_XMIT_HASH_POLICY_INVALID;
+        b->lacp_rate = _NETDEV_BOND_LACP_RATE_INVALID;
+        b->ad_select = _NETDEV_BOND_AD_SELECT_INVALID;
+        b->fail_over_mac = _NETDEV_BOND_FAIL_OVER_MAC_INVALID;
+        b->arp_validate = _NETDEV_BOND_ARP_VALIDATE_INVALID;
+        b->arp_all_targets = _NETDEV_BOND_ARP_ALL_TARGETS_INVALID;
+        b->primary_reselect = _NETDEV_BOND_PRIMARY_RESELECT_INVALID;
+
+        b->all_slaves_active = false;
+        b->tlb_dynamic_lb = -1;
+
+        b->resend_igmp = RESEND_IGMP_DEFAULT;
+        b->packets_per_slave = PACKETS_PER_SLAVE_DEFAULT;
+        b->num_grat_arp = GRATUITOUS_ARP_DEFAULT;
+        b->lp_interval = LEARNING_PACKETS_INTERVAL_MIN_SEC;
+}
+
+const NetDevVTable bond_vtable = {
+        .object_size = sizeof(Bond),
+        .init = bond_init,
+        .done = bond_done,
+        .sections = NETDEV_COMMON_SECTIONS "Bond\0",
+        .fill_message_create = netdev_bond_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/bond.h b/src/network/netdev/bond.h
new file mode 100644
index 0000000..e4b0a0d
--- /dev/null
+++ b/src/network/netdev/bond.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <netinet/in.h>
+#include <linux/if_bonding.h>
+
+#include "bond-util.h"
+#include "macro.h"
+#include "netdev.h"
+#include "ordered-set.h"
+
+typedef struct Bond {
+        NetDev meta;
+
+        BondMode mode;
+        BondXmitHashPolicy xmit_hash_policy;
+        BondLacpRate lacp_rate;
+        BondAdSelect ad_select;
+        BondFailOverMac fail_over_mac;
+        BondArpValidate arp_validate;
+        BondArpAllTargets arp_all_targets;
+        BondPrimaryReselect primary_reselect;
+
+        int tlb_dynamic_lb;
+
+        bool all_slaves_active;
+
+        unsigned resend_igmp;
+        unsigned packets_per_slave;
+        unsigned num_grat_arp;
+        unsigned min_links;
+
+        uint16_t ad_actor_sys_prio;
+        uint16_t ad_user_port_key;
+        struct ether_addr ad_actor_system;
+
+        usec_t miimon;
+        usec_t updelay;
+        usec_t downdelay;
+        usec_t arp_interval;
+        usec_t lp_interval;
+
+        OrderedSet *arp_ip_targets;
+} Bond;
+
+DEFINE_NETDEV_CAST(BOND, Bond);
+extern const NetDevVTable bond_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_xmit_hash_policy);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_lacp_rate);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_ad_select);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_fail_over_mac);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_arp_validate);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_arp_all_targets);
+CONFIG_PARSER_PROTOTYPE(config_parse_bond_primary_reselect);
+CONFIG_PARSER_PROTOTYPE(config_parse_arp_ip_target_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_ad_actor_sys_prio);
+CONFIG_PARSER_PROTOTYPE(config_parse_ad_user_port_key);
+CONFIG_PARSER_PROTOTYPE(config_parse_ad_actor_system);
diff --git a/src/network/netdev/bridge.c b/src/network/netdev/bridge.c
new file mode 100644
index 0000000..b65c3b4
--- /dev/null
+++ b/src/network/netdev/bridge.c
@@ -0,0 +1,290 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+#include <linux/if_bridge.h>
+
+#include "bridge.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "string-table.h"
+#include "vlan-util.h"
+
+assert_cc((int) MULTICAST_ROUTER_NONE            == (int) MDB_RTR_TYPE_DISABLED);
+assert_cc((int) MULTICAST_ROUTER_TEMPORARY_QUERY == (int) MDB_RTR_TYPE_TEMP_QUERY);
+assert_cc((int) MULTICAST_ROUTER_PERMANENT       == (int) MDB_RTR_TYPE_PERM);
+assert_cc((int) MULTICAST_ROUTER_TEMPORARY       == (int) MDB_RTR_TYPE_TEMP);
+
+static const char* const multicast_router_table[_MULTICAST_ROUTER_MAX] = {
+        [MULTICAST_ROUTER_NONE]            = "no",
+        [MULTICAST_ROUTER_TEMPORARY_QUERY] = "query",
+        [MULTICAST_ROUTER_PERMANENT]       = "permanent",
+        [MULTICAST_ROUTER_TEMPORARY]       = "temporary",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(multicast_router, MulticastRouter, _MULTICAST_ROUTER_INVALID);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_multicast_router, multicast_router, MulticastRouter,
+                         "Failed to parse bridge multicast router setting");
+
+/* callback for bridge netdev's parameter set */
+static int netdev_bridge_set_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "Bridge parameters could not be set: %m");
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Bridge parameters set success");
+
+        return 1;
+}
+
+static int netdev_bridge_post_create_message(NetDev *netdev, sd_netlink_message *req) {
+        Bridge *b;
+        int r;
+
+        assert_se(b = BRIDGE(netdev));
+
+        r = sd_netlink_message_open_container(req, IFLA_LINKINFO);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_open_container_union(req, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
+        if (r < 0)
+                return r;
+
+        /* convert to jiffes */
+        if (b->forward_delay != USEC_INFINITY) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_FORWARD_DELAY, usec_to_jiffies(b->forward_delay));
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->hello_time > 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_HELLO_TIME, usec_to_jiffies(b->hello_time));
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->max_age > 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_MAX_AGE, usec_to_jiffies(b->max_age));
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->ageing_time != USEC_INFINITY) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_AGEING_TIME, usec_to_jiffies(b->ageing_time));
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->priority > 0) {
+                r = sd_netlink_message_append_u16(req, IFLA_BR_PRIORITY, b->priority);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->group_fwd_mask > 0) {
+                r = sd_netlink_message_append_u16(req, IFLA_BR_GROUP_FWD_MASK, b->group_fwd_mask);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->default_pvid != VLANID_INVALID) {
+                r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_DEFAULT_PVID, b->default_pvid);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->mcast_querier >= 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_QUERIER, b->mcast_querier);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->mcast_snooping >= 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_SNOOPING, b->mcast_snooping);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->vlan_filtering >= 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_VLAN_FILTERING, b->vlan_filtering);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->vlan_protocol >= 0) {
+                r = sd_netlink_message_append_u16(req, IFLA_BR_VLAN_PROTOCOL, htobe16(b->vlan_protocol));
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->stp >= 0) {
+                r = sd_netlink_message_append_u32(req, IFLA_BR_STP_STATE, b->stp);
+                if (r < 0)
+                        return r;
+        }
+
+        if (b->igmp_version > 0) {
+                r = sd_netlink_message_append_u8(req, IFLA_BR_MCAST_IGMP_VERSION, b->igmp_version);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(req);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_bridge_post_create(NetDev *netdev, Link *link) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(netdev);
+
+        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, netdev->ifindex);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m");
+
+        r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_ACK);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set netlink message flags: %m");
+
+        r = netdev_bridge_post_create_message(netdev, req);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->rtnl, NULL, req, netdev_bridge_set_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not send netlink message: %m");
+
+        netdev_ref(netdev);
+
+        return r;
+}
+
+int config_parse_bridge_igmp_version(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Bridge *b = userdata;
+        uint8_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (isempty(rvalue)) {
+                b->igmp_version = 0; /* 0 means unset. */
+                return 0;
+        }
+
+        r = safe_atou8(rvalue, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse bridge's multicast IGMP version number '%s', ignoring assignment: %m",
+                           rvalue);
+                return 0;
+        }
+        if (!IN_SET(u, 2, 3)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid bridge's multicast IGMP version number '%s', ignoring assignment.", rvalue);
+                return 0;
+        }
+
+        b->igmp_version = u;
+
+        return 0;
+}
+
+int config_parse_bridge_port_priority(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint16_t i;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* This is used in networkd-network-gperf.gperf. */
+
+        r = safe_atou16(rvalue, &i);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse bridge port priority, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Bridge port priority is larger than maximum %u, ignoring: %s",
+                           LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
+                return 0;
+        }
+
+        *((uint16_t *)data) = i;
+
+        return 0;
+}
+
+static void bridge_init(NetDev *n) {
+        Bridge *b;
+
+        b = BRIDGE(n);
+
+        assert(b);
+
+        b->mcast_querier = -1;
+        b->mcast_snooping = -1;
+        b->vlan_filtering = -1;
+        b->vlan_protocol = -1;
+        b->stp = -1;
+        b->default_pvid = VLANID_INVALID;
+        b->forward_delay = USEC_INFINITY;
+        b->ageing_time = USEC_INFINITY;
+}
+
+const NetDevVTable bridge_vtable = {
+        .object_size = sizeof(Bridge),
+        .init = bridge_init,
+        .sections = NETDEV_COMMON_SECTIONS "Bridge\0",
+        .post_create = netdev_bridge_post_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/bridge.h b/src/network/netdev/bridge.h
new file mode 100644
index 0000000..72dd3e4
--- /dev/null
+++ b/src/network/netdev/bridge.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "conf-parser.h"
+#include "netdev.h"
+
+#define LINK_BRIDGE_PORT_PRIORITY_INVALID 128U
+#define LINK_BRIDGE_PORT_PRIORITY_MAX 63U
+
+typedef struct Bridge {
+        NetDev meta;
+
+        int mcast_querier;
+        int mcast_snooping;
+        int vlan_filtering;
+        int vlan_protocol;
+        int stp;
+        uint16_t priority;
+        uint16_t group_fwd_mask;
+        uint16_t default_pvid;
+        uint8_t igmp_version;
+
+        usec_t forward_delay;
+        usec_t hello_time;
+        usec_t max_age;
+        usec_t ageing_time;
+} Bridge;
+
+typedef enum MulticastRouter {
+        MULTICAST_ROUTER_NONE,
+        MULTICAST_ROUTER_TEMPORARY_QUERY,
+        MULTICAST_ROUTER_PERMANENT,
+        MULTICAST_ROUTER_TEMPORARY,
+        _MULTICAST_ROUTER_MAX,
+        _MULTICAST_ROUTER_INVALID = -EINVAL,
+} MulticastRouter;
+
+DEFINE_NETDEV_CAST(BRIDGE, Bridge);
+extern const NetDevVTable bridge_vtable;
+
+const char* multicast_router_to_string(MulticastRouter i) _const_;
+MulticastRouter multicast_router_from_string(const char *s) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_multicast_router);
+CONFIG_PARSER_PROTOTYPE(config_parse_bridge_igmp_version);
+CONFIG_PARSER_PROTOTYPE(config_parse_bridge_port_priority);
diff --git a/src/network/netdev/dummy.c b/src/network/netdev/dummy.c
new file mode 100644
index 0000000..00df1d2
--- /dev/null
+++ b/src/network/netdev/dummy.c
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+
+#include "dummy.h"
+
+const NetDevVTable dummy_vtable = {
+        .object_size = sizeof(Dummy),
+        .sections = NETDEV_COMMON_SECTIONS,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/dummy.h b/src/network/netdev/dummy.h
new file mode 100644
index 0000000..eafdf4b
--- /dev/null
+++ b/src/network/netdev/dummy.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "netdev.h"
+
+typedef struct Dummy {
+        NetDev meta;
+} Dummy;
+
+DEFINE_NETDEV_CAST(DUMMY, Dummy);
+extern const NetDevVTable dummy_vtable;
diff --git a/src/network/netdev/fou-tunnel.c b/src/network/netdev/fou-tunnel.c
new file mode 100644
index 0000000..acd609f
--- /dev/null
+++ b/src/network/netdev/fou-tunnel.c
@@ -0,0 +1,285 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/fou.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/ip.h>
+
+#include "conf-parser.h"
+#include "fou-tunnel.h"
+#include "ip-protocol-list.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+static const char* const fou_encap_type_table[_NETDEV_FOO_OVER_UDP_ENCAP_MAX] = {
+        [NETDEV_FOO_OVER_UDP_ENCAP_DIRECT] = "FooOverUDP",
+        [NETDEV_FOO_OVER_UDP_ENCAP_GUE] = "GenericUDPEncapsulation",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(fou_encap_type, FooOverUDPEncapType);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_fou_encap_type, fou_encap_type, FooOverUDPEncapType,
+                         "Failed to parse Encapsulation=");
+
+static int netdev_fill_fou_tunnel_message(NetDev *netdev, sd_netlink_message *m) {
+        FouTunnel *t;
+        uint8_t encap_type;
+        int r;
+
+        assert_se(t = FOU(netdev));
+
+        r = sd_netlink_message_append_u16(m, FOU_ATTR_PORT, htobe16(t->port));
+        if (r < 0)
+                return r;
+
+        if (IN_SET(t->peer_family, AF_INET, AF_INET6)) {
+                r = sd_netlink_message_append_u16(m, FOU_ATTR_PEER_PORT, htobe16(t->peer_port));
+                if (r < 0)
+                        return r;
+        }
+
+        switch (t->fou_encap_type) {
+        case NETDEV_FOO_OVER_UDP_ENCAP_DIRECT:
+                encap_type = FOU_ENCAP_DIRECT;
+                break;
+        case NETDEV_FOO_OVER_UDP_ENCAP_GUE:
+                encap_type = FOU_ENCAP_GUE;
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        r = sd_netlink_message_append_u8(m, FOU_ATTR_TYPE, encap_type);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, FOU_ATTR_AF, AF_INET);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, FOU_ATTR_IPPROTO, t->fou_protocol);
+        if (r < 0)
+                return r;
+
+        if (t->local_family == AF_INET) {
+                r = sd_netlink_message_append_in_addr(m, FOU_ATTR_LOCAL_V4, &t->local.in);
+                if (r < 0)
+                        return r;
+        } else if (t->local_family == AF_INET6) {
+                r = sd_netlink_message_append_in6_addr(m, FOU_ATTR_LOCAL_V6, &t->local.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        if (t->peer_family == AF_INET) {
+                r = sd_netlink_message_append_in_addr(m, FOU_ATTR_PEER_V4, &t->peer.in);
+                if (r < 0)
+                        return r;
+        } else if (t->peer_family == AF_INET6){
+                r = sd_netlink_message_append_in6_addr(m, FOU_ATTR_PEER_V6, &t->peer.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int netdev_create_fou_tunnel_message(NetDev *netdev, sd_netlink_message **ret) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+
+        r = sd_genl_message_new(netdev->manager->genl, FOU_GENL_NAME, FOU_CMD_ADD, &m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not allocate netlink message: %m");
+
+        r = netdev_fill_fou_tunnel_message(netdev, m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not create netlink message: %m");
+
+        *ret = TAKE_PTR(m);
+        return 0;
+}
+
+static int fou_tunnel_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "FooOverUDP tunnel is created");
+        return 1;
+}
+
+static int netdev_fou_tunnel_create(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(FOU(netdev));
+
+        r = netdev_create_fou_tunnel_message(netdev, &m);
+        if (r < 0)
+                return r;
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, fou_tunnel_create_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create FooOverUDP tunnel: %m");
+
+        netdev_ref(netdev);
+        return 0;
+}
+
+int config_parse_ip_protocol(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint8_t *ret = ASSERT_PTR(data);
+        unsigned protocol;
+        /* linux/fou.h defines the netlink field as one byte, so we need to reject protocols numbers that
+         * don't fit in one byte. */
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_ip_protocol(rvalue);
+        if (r >= 0)
+                protocol = r;
+        else {
+                r = safe_atou(rvalue, &protocol);
+                if (r < 0)
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse IP protocol '%s' for FooOverUDP tunnel, "
+                                   "ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        if (protocol > UINT8_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "IP protocol '%s' for FooOverUDP tunnel out of range, "
+                           "ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        *ret = protocol;
+        return 0;
+}
+
+int config_parse_fou_tunnel_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        union in_addr_union *addr = ASSERT_PTR(data);
+        FouTunnel *t = userdata;
+        int r, *f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (streq(lvalue, "Local"))
+                f = &t->local_family;
+        else
+                f = &t->peer_family;
+
+        r = in_addr_from_string_auto(rvalue, f, addr);
+        if (r < 0)
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "FooOverUDP tunnel '%s' address is invalid, ignoring assignment: %s",
+                           lvalue, rvalue);
+
+        return 0;
+}
+
+static int netdev_fou_tunnel_verify(NetDev *netdev, const char *filename) {
+        FouTunnel *t;
+
+        assert(netdev);
+        assert(filename);
+
+        t = FOU(netdev);
+
+        assert(t);
+
+        switch (t->fou_encap_type) {
+        case NETDEV_FOO_OVER_UDP_ENCAP_DIRECT:
+                if (t->fou_protocol <= 0)
+                        return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                      "FooOverUDP protocol not configured in %s. Rejecting configuration.",
+                                                      filename);
+                break;
+        case NETDEV_FOO_OVER_UDP_ENCAP_GUE:
+                if (t->fou_protocol > 0)
+                        return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                      "FooOverUDP GUE can't be set with protocol configured in %s. Rejecting configuration.",
+                                                      filename);
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        if (t->peer_family == AF_UNSPEC && t->peer_port > 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "FooOverUDP peer port is set but peer address not configured in %s. Rejecting configuration.",
+                                              filename);
+        else if (t->peer_family != AF_UNSPEC && t->peer_port == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "FooOverUDP peer port not set but peer address is configured in %s. Rejecting configuration.",
+                                              filename);
+        return 0;
+}
+
+static void fou_tunnel_init(NetDev *netdev) {
+        FouTunnel *t;
+
+        assert(netdev);
+
+        t = FOU(netdev);
+
+        assert(t);
+
+        t->fou_encap_type = NETDEV_FOO_OVER_UDP_ENCAP_DIRECT;
+}
+
+const NetDevVTable foutnl_vtable = {
+        .object_size = sizeof(FouTunnel),
+        .init = fou_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "FooOverUDP\0",
+        .create = netdev_fou_tunnel_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_fou_tunnel_verify,
+};
diff --git a/src/network/netdev/fou-tunnel.h b/src/network/netdev/fou-tunnel.h
new file mode 100644
index 0000000..576d82e
--- /dev/null
+++ b/src/network/netdev/fou-tunnel.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <netinet/in.h>
+#include <linux/fou.h>
+
+#include "in-addr-util.h"
+#include "netdev.h"
+
+typedef enum FooOverUDPEncapType {
+        NETDEV_FOO_OVER_UDP_ENCAP_UNSPEC = FOU_ENCAP_UNSPEC,
+        NETDEV_FOO_OVER_UDP_ENCAP_DIRECT = FOU_ENCAP_DIRECT,
+        NETDEV_FOO_OVER_UDP_ENCAP_GUE = FOU_ENCAP_GUE,
+        _NETDEV_FOO_OVER_UDP_ENCAP_MAX,
+        _NETDEV_FOO_OVER_UDP_ENCAP_INVALID = -EINVAL,
+} FooOverUDPEncapType;
+
+typedef struct FouTunnel {
+        NetDev meta;
+
+        uint8_t fou_protocol;
+
+        uint16_t port;
+        uint16_t peer_port;
+
+        int local_family;
+        int peer_family;
+
+        FooOverUDPEncapType fou_encap_type;
+        union in_addr_union local;
+        union in_addr_union peer;
+} FouTunnel;
+
+DEFINE_NETDEV_CAST(FOU, FouTunnel);
+extern const NetDevVTable foutnl_vtable;
+
+const char *fou_encap_type_to_string(FooOverUDPEncapType d) _const_;
+FooOverUDPEncapType fou_encap_type_from_string(const char *d) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_fou_encap_type);
+CONFIG_PARSER_PROTOTYPE(config_parse_ip_protocol);
+CONFIG_PARSER_PROTOTYPE(config_parse_fou_tunnel_address);
diff --git a/src/network/netdev/geneve.c b/src/network/netdev/geneve.c
new file mode 100644
index 0000000..777a32d
--- /dev/null
+++ b/src/network/netdev/geneve.c
@@ -0,0 +1,299 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "extract-word.h"
+#include "geneve.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+
+#define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU
+#define DEFAULT_GENEVE_DESTINATION_PORT 6081
+
+static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = {
+        [NETDEV_GENEVE_DF_NO] = "no",
+        [NETDEV_GENEVE_DF_YES] = "yes",
+        [NETDEV_GENEVE_DF_INHERIT] = "inherit",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF, "Failed to parse Geneve IPDoNotFragment= setting");
+
+static int netdev_geneve_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Geneve *v;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        v = GENEVE(netdev);
+
+        if (v->id <= GENEVE_VID_MAX) {
+                r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id);
+                if (r < 0)
+                        return r;
+        }
+
+        if (in_addr_is_set(v->remote_family, &v->remote)) {
+                if (v->remote_family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in);
+                else
+                        r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->inherit) {
+                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1);
+                if (r < 0)
+                        return r;
+        } else {
+                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
+        if (r < 0)
+                return r;
+
+        if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) {
+                r = sd_netlink_message_append_u16(m, IFLA_GENEVE_PORT, htobe16(v->dest_port));
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->flow_label > 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label));
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int config_parse_geneve_vni(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Geneve *v = userdata;
+        uint32_t f;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou32(rvalue, &f);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve VNI '%s'.", rvalue);
+                return 0;
+        }
+
+        if (f > GENEVE_VID_MAX){
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Geneve VNI out is of range '%s'.", rvalue);
+                return 0;
+        }
+
+        v->id = f;
+
+        return 0;
+}
+
+int config_parse_geneve_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Geneve *v = userdata;
+        union in_addr_union *addr = data, buffer;
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        r = in_addr_is_multicast(f, &buffer);
+        if (r > 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        v->remote_family = f;
+        *addr = buffer;
+
+        return 0;
+}
+
+int config_parse_geneve_flow_label(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Geneve *v = userdata;
+        uint32_t f;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou32(rvalue, &f);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue);
+                return 0;
+        }
+
+        if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
+                return 0;
+        }
+
+        v->flow_label = f;
+
+        return 0;
+}
+
+int config_parse_geneve_ttl(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Geneve *v = userdata;
+        unsigned f;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(rvalue, "inherit"))
+                v->inherit = true;
+        else {
+                r = safe_atou(rvalue, &f);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse Geneve TTL '%s', ignoring assignment: %m", rvalue);
+                        return 0;
+                }
+
+                if (f > 255) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid Geneve TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue);
+                        return 0;
+                }
+
+                v->ttl = f;
+        }
+
+        return 0;
+}
+
+static int netdev_geneve_verify(NetDev *netdev, const char *filename) {
+        Geneve *v = GENEVE(netdev);
+
+        assert(netdev);
+        assert(v);
+        assert(filename);
+
+        if (v->id > GENEVE_VID_MAX)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.",
+                                                filename);
+
+        return 0;
+}
+
+static void geneve_init(NetDev *netdev) {
+        Geneve *v;
+
+        assert(netdev);
+
+        v = GENEVE(netdev);
+
+        assert(v);
+
+        v->id = GENEVE_VID_MAX + 1;
+        v->geneve_df = _NETDEV_GENEVE_DF_INVALID;
+        v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT;
+        v->udpcsum = false;
+        v->udp6zerocsumtx = false;
+        v->udp6zerocsumrx = false;
+}
+
+const NetDevVTable geneve_vtable = {
+        .object_size = sizeof(Geneve),
+        .init = geneve_init,
+        .sections = NETDEV_COMMON_SECTIONS "GENEVE\0",
+        .fill_message_create = netdev_geneve_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_geneve_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/geneve.h b/src/network/netdev/geneve.h
new file mode 100644
index 0000000..1f0f15c
--- /dev/null
+++ b/src/network/netdev/geneve.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct Geneve Geneve;
+
+#include "in-addr-util.h"
+#include "netdev.h"
+#include "networkd-network.h"
+
+#define GENEVE_VID_MAX (1u << 24) - 1
+
+typedef enum GeneveDF {
+        NETDEV_GENEVE_DF_NO = GENEVE_DF_UNSET,
+        NETDEV_GENEVE_DF_YES = GENEVE_DF_SET,
+        NETDEV_GENEVE_DF_INHERIT = GENEVE_DF_INHERIT,
+        _NETDEV_GENEVE_DF_MAX,
+        _NETDEV_GENEVE_DF_INVALID = -EINVAL,
+} GeneveDF;
+
+struct Geneve {
+        NetDev meta;
+
+        uint32_t id;
+        uint32_t flow_label;
+
+        int remote_family;
+
+        uint8_t tos;
+        uint8_t ttl;
+
+        uint16_t dest_port;
+
+        bool udpcsum;
+        bool udp6zerocsumtx;
+        bool udp6zerocsumrx;
+        bool inherit;
+
+        GeneveDF geneve_df;
+        union in_addr_union remote;
+};
+
+DEFINE_NETDEV_CAST(GENEVE, Geneve);
+extern const NetDevVTable geneve_vtable;
+
+const char *geneve_df_to_string(GeneveDF d) _const_;
+GeneveDF geneve_df_from_string(const char *d) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_geneve_vni);
+CONFIG_PARSER_PROTOTYPE(config_parse_geneve_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_geneve_flow_label);
+CONFIG_PARSER_PROTOTYPE(config_parse_geneve_df);
+CONFIG_PARSER_PROTOTYPE(config_parse_geneve_ttl);
diff --git a/src/network/netdev/ifb.c b/src/network/netdev/ifb.c
new file mode 100644
index 0000000..d7ff44c
--- /dev/null
+++ b/src/network/netdev/ifb.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/if_arp.h>
+
+#include "ifb.h"
+
+const NetDevVTable ifb_vtable = {
+        .object_size = sizeof(IntermediateFunctionalBlock),
+        .sections = NETDEV_COMMON_SECTIONS,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/ifb.h b/src/network/netdev/ifb.h
new file mode 100644
index 0000000..badfb4a
--- /dev/null
+++ b/src/network/netdev/ifb.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#pragma once
+
+#include "netdev.h"
+
+typedef struct IntermediateFunctionalBlock {
+        NetDev meta;
+} IntermediateFunctionalBlock;
+
+DEFINE_NETDEV_CAST(IFB, IntermediateFunctionalBlock);
+extern const NetDevVTable ifb_vtable;
diff --git a/src/network/netdev/ipoib.c b/src/network/netdev/ipoib.c
new file mode 100644
index 0000000..5dd9286
--- /dev/null
+++ b/src/network/netdev/ipoib.c
@@ -0,0 +1,161 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+#include <linux/if_link.h>
+
+#include "ipoib.h"
+#include "networkd-network.h"
+#include "parse-util.h"
+#include "string-table.h"
+
+assert_cc((int) IP_OVER_INFINIBAND_MODE_DATAGRAM  == (int) IPOIB_MODE_DATAGRAM);
+assert_cc((int) IP_OVER_INFINIBAND_MODE_CONNECTED == (int) IPOIB_MODE_CONNECTED);
+
+static void netdev_ipoib_init(NetDev *netdev) {
+        IPoIB *ipoib;
+
+        assert(netdev);
+
+        ipoib = IPOIB(netdev);
+
+        assert(ipoib);
+
+        ipoib->mode = _IP_OVER_INFINIBAND_MODE_INVALID;
+        ipoib->umcast = -1;
+}
+
+static int netdev_ipoib_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        IPoIB *ipoib;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(m);
+
+        ipoib = IPOIB(netdev);
+
+        assert(ipoib);
+
+        if (ipoib->pkey > 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPOIB_PKEY, ipoib->pkey);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ipoib->mode >= 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPOIB_MODE, ipoib->mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (ipoib->umcast >= 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPOIB_UMCAST, ipoib->umcast);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int ipoib_set_netlink_message(Link *link, sd_netlink_message *m) {
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(m);
+
+        r = sd_netlink_message_set_flags(m, NLM_F_REQUEST | NLM_F_ACK);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, link->kind);
+        if (r < 0)
+                return r;
+
+        if (link->network->ipoib_mode >= 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPOIB_MODE, link->network->ipoib_mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link->network->ipoib_umcast >= 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPOIB_UMCAST, link->network->ipoib_umcast);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static const char * const ipoib_mode_table[_IP_OVER_INFINIBAND_MODE_MAX] = {
+        [IP_OVER_INFINIBAND_MODE_DATAGRAM]  = "datagram",
+        [IP_OVER_INFINIBAND_MODE_CONNECTED] = "connected",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(ipoib_mode, IPoIBMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ipoib_mode, ipoib_mode, IPoIBMode, "Failed to parse IPoIB mode");
+
+int config_parse_ipoib_pkey(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint16_t u, *pkey = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *pkey = 0; /* 0 means unset. */
+                return 0;
+        }
+
+        r = safe_atou16(rvalue, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse IPoIB pkey '%s', ignoring assignment: %m",
+                           rvalue);
+                return 0;
+        }
+        if (IN_SET(u, 0, 0x8000)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "IPoIB pkey cannot be 0 nor 0x8000, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        *pkey = u;
+        return 0;
+}
+
+
+const NetDevVTable ipoib_vtable = {
+        .object_size = sizeof(IPoIB),
+        .sections = NETDEV_COMMON_SECTIONS "IPoIB\0",
+        .init = netdev_ipoib_init,
+        .fill_message_create = netdev_ipoib_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_INFINIBAND,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/ipoib.h b/src/network/netdev/ipoib.h
new file mode 100644
index 0000000..415d3b1
--- /dev/null
+++ b/src/network/netdev/ipoib.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <errno.h>
+
+#include "conf-parser.h"
+#include "netdev.h"
+
+typedef enum IPoIBMode {
+        IP_OVER_INFINIBAND_MODE_DATAGRAM,
+        IP_OVER_INFINIBAND_MODE_CONNECTED,
+        _IP_OVER_INFINIBAND_MODE_MAX,
+        _IP_OVER_INFINIBAND_MODE_INVALID = -EINVAL,
+} IPoIBMode;
+
+typedef struct IPoIB {
+        NetDev meta;
+
+        uint16_t pkey;
+        IPoIBMode mode;
+        int umcast;
+} IPoIB;
+
+DEFINE_NETDEV_CAST(IPOIB, IPoIB);
+extern const NetDevVTable ipoib_vtable;
+
+int ipoib_set_netlink_message(Link *link, sd_netlink_message *m);
+
+CONFIG_PARSER_PROTOTYPE(config_parse_ipoib_pkey);
+CONFIG_PARSER_PROTOTYPE(config_parse_ipoib_mode);
diff --git a/src/network/netdev/ipvlan.c b/src/network/netdev/ipvlan.c
new file mode 100644
index 0000000..058eade
--- /dev/null
+++ b/src/network/netdev/ipvlan.c
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "conf-parser.h"
+#include "ipvlan.h"
+#include "ipvlan-util.h"
+#include "networkd-link.h"
+#include "string-util.h"
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ipvlan_mode, ipvlan_mode, IPVlanMode, "Failed to parse ipvlan mode");
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ipvlan_flags, ipvlan_flags, IPVlanFlags, "Failed to parse ipvlan flags");
+
+static int netdev_ipvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        IPVlan *m;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(netdev->ifname);
+
+        if (netdev->kind == NETDEV_KIND_IPVLAN)
+                m = IPVLAN(netdev);
+        else
+                m = IPVTAP(netdev);
+
+        assert(m);
+
+        if (m->mode != _NETDEV_IPVLAN_MODE_INVALID) {
+                r = sd_netlink_message_append_u16(req, IFLA_IPVLAN_MODE, m->mode);
+                if (r < 0)
+                        return r;
+        }
+
+        if (m->flags != _NETDEV_IPVLAN_FLAGS_INVALID) {
+                r = sd_netlink_message_append_u16(req, IFLA_IPVLAN_FLAGS, m->flags);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static void ipvlan_init(NetDev *n) {
+        IPVlan *m;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_IPVLAN)
+                m = IPVLAN(n);
+        else
+                m = IPVTAP(n);
+
+        assert(m);
+
+        m->mode = _NETDEV_IPVLAN_MODE_INVALID;
+        m->flags = _NETDEV_IPVLAN_FLAGS_INVALID;
+}
+
+const NetDevVTable ipvlan_vtable = {
+        .object_size = sizeof(IPVlan),
+        .init = ipvlan_init,
+        .sections = NETDEV_COMMON_SECTIONS "IPVLAN\0",
+        .fill_message_create = netdev_ipvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
+
+const NetDevVTable ipvtap_vtable = {
+        .object_size = sizeof(IPVlan),
+        .init = ipvlan_init,
+        .sections = NETDEV_COMMON_SECTIONS "IPVTAP\0",
+        .fill_message_create = netdev_ipvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
+
+IPVlanMode link_get_ipvlan_mode(Link *link) {
+        IPVlan *ipvlan;
+
+        assert(link);
+
+        ipvlan = IPVLAN(link->netdev);
+        if (!ipvlan)
+                return _NETDEV_IPVLAN_MODE_INVALID;
+
+        return ipvlan->mode;
+}
diff --git a/src/network/netdev/ipvlan.h b/src/network/netdev/ipvlan.h
new file mode 100644
index 0000000..633b0bd
--- /dev/null
+++ b/src/network/netdev/ipvlan.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <netinet/in.h>
+#include <linux/if_link.h>
+
+#include "ipvlan-util.h"
+#include "netdev.h"
+
+typedef struct IPVlan {
+        NetDev meta;
+
+        IPVlanMode mode;
+        IPVlanFlags flags;
+} IPVlan;
+
+DEFINE_NETDEV_CAST(IPVLAN, IPVlan);
+DEFINE_NETDEV_CAST(IPVTAP, IPVlan);
+extern const NetDevVTable ipvlan_vtable;
+extern const NetDevVTable ipvtap_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_ipvlan_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_ipvlan_flags);
+
+IPVlanMode link_get_ipvlan_mode(Link *link);
diff --git a/src/network/netdev/l2tp-tunnel.c b/src/network/netdev/l2tp-tunnel.c
new file mode 100644
index 0000000..fd2783e
--- /dev/null
+++ b/src/network/netdev/l2tp-tunnel.c
@@ -0,0 +1,880 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/in.h>
+#include <linux/l2tp.h>
+#include <linux/genetlink.h>
+
+#include "conf-parser.h"
+#include "hashmap.h"
+#include "l2tp-tunnel.h"
+#include "netlink-util.h"
+#include "networkd-address.h"
+#include "networkd-manager.h"
+#include "networkd-route-util.h"
+#include "parse-util.h"
+#include "socket-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+static const char* const l2tp_l2spec_type_table[_NETDEV_L2TP_L2SPECTYPE_MAX] = {
+        [NETDEV_L2TP_L2SPECTYPE_NONE]    = "none",
+        [NETDEV_L2TP_L2SPECTYPE_DEFAULT] = "default",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_l2spec_type, L2tpL2specType);
+
+static const char* const l2tp_encap_type_table[_NETDEV_L2TP_ENCAPTYPE_MAX] = {
+        [NETDEV_L2TP_ENCAPTYPE_UDP] = "udp",
+        [NETDEV_L2TP_ENCAPTYPE_IP]  = "ip",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_encap_type, L2tpEncapType);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_l2tp_encap_type, l2tp_encap_type, L2tpEncapType, "Failed to parse L2TP Encapsulation Type");
+
+static const char* const l2tp_local_address_type_table[_NETDEV_L2TP_LOCAL_ADDRESS_MAX] = {
+         [NETDEV_L2TP_LOCAL_ADDRESS_AUTO]    = "auto",
+         [NETDEV_L2TP_LOCAL_ADDRESS_STATIC]  = "static",
+         [NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC] = "dynamic",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_local_address_type, L2tpLocalAddressType);
+
+static L2tpSession* l2tp_session_free(L2tpSession *s) {
+        if (!s)
+                return NULL;
+
+        if (s->tunnel && s->section)
+                ordered_hashmap_remove(s->tunnel->sessions_by_section, s->section);
+
+        config_section_free(s->section);
+        free(s->name);
+        return mfree(s);
+}
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(L2tpSession, l2tp_session_free);
+
+static int l2tp_session_new_static(L2tpTunnel *t, const char *filename, unsigned section_line, L2tpSession **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(l2tp_session_freep) L2tpSession *s = NULL;
+        int r;
+
+        assert(t);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        s = ordered_hashmap_get(t->sessions_by_section, n);
+        if (s) {
+                *ret = TAKE_PTR(s);
+                return 0;
+        }
+
+        s = new(L2tpSession, 1);
+        if (!s)
+                return -ENOMEM;
+
+        *s = (L2tpSession) {
+                .l2tp_l2spec_type = NETDEV_L2TP_L2SPECTYPE_DEFAULT,
+                .tunnel = t,
+                .section = TAKE_PTR(n),
+        };
+
+        r = ordered_hashmap_ensure_put(&t->sessions_by_section, &config_section_hash_ops, s->section, s);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(s);
+        return 0;
+}
+
+static int netdev_l2tp_create_message_tunnel(NetDev *netdev, union in_addr_union *local_address, sd_netlink_message **ret) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        uint16_t encap_type;
+        L2tpTunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(local_address);
+        assert_se(t = L2TP(netdev));
+
+        r = sd_genl_message_new(netdev->manager->genl, L2TP_GENL_NAME, L2TP_CMD_TUNNEL_CREATE, &m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, t->tunnel_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, t->peer_tunnel_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, L2TP_ATTR_PROTO_VERSION, 3);
+        if (r < 0)
+                return r;
+
+        switch (t->l2tp_encap_type) {
+        case NETDEV_L2TP_ENCAPTYPE_IP:
+                encap_type = L2TP_ENCAPTYPE_IP;
+                break;
+        case NETDEV_L2TP_ENCAPTYPE_UDP:
+        default:
+                encap_type = L2TP_ENCAPTYPE_UDP;
+                break;
+        }
+
+        r = sd_netlink_message_append_u16(m, L2TP_ATTR_ENCAP_TYPE, encap_type);
+        if (r < 0)
+                return r;
+
+        if (t->family == AF_INET) {
+                r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_SADDR, &local_address->in);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_DADDR, &t->remote.in);
+                if (r < 0)
+                        return r;
+        } else {
+                r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_SADDR, &local_address->in6);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_DADDR, &t->remote.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        if (encap_type == L2TP_ENCAPTYPE_UDP) {
+                r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_SPORT, t->l2tp_udp_sport);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_DPORT, t->l2tp_udp_dport);
+                if (r < 0)
+                        return r;
+
+                if (t->udp_csum) {
+                        r = sd_netlink_message_append_u8(m, L2TP_ATTR_UDP_CSUM, t->udp_csum);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (t->udp6_csum_tx) {
+                        r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_TX);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (t->udp6_csum_rx) {
+                        r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_RX);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        *ret = TAKE_PTR(m);
+
+        return 0;
+}
+
+static int netdev_l2tp_create_message_session(NetDev *netdev, L2tpSession *session, sd_netlink_message **ret) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        uint16_t l2_spec_len;
+        uint8_t l2_spec_type;
+        int r;
+
+        assert(netdev);
+        assert(session);
+        assert(session->tunnel);
+
+        r = sd_genl_message_new(netdev->manager->genl, L2TP_GENL_NAME, L2TP_CMD_SESSION_CREATE, &m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, session->tunnel->tunnel_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, session->tunnel->peer_tunnel_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_SESSION_ID, session->session_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, L2TP_ATTR_PW_TYPE, L2TP_PWTYPE_ETH);
+        if (r < 0)
+                return r;
+
+        switch (session->l2tp_l2spec_type) {
+        case NETDEV_L2TP_L2SPECTYPE_NONE:
+                l2_spec_type = L2TP_L2SPECTYPE_NONE;
+                l2_spec_len = 0;
+                break;
+        case NETDEV_L2TP_L2SPECTYPE_DEFAULT:
+        default:
+                l2_spec_type = L2TP_L2SPECTYPE_DEFAULT;
+                l2_spec_len = 4;
+                break;
+        }
+
+        r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_TYPE, l2_spec_type);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_LEN, l2_spec_len);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_string(m, L2TP_ATTR_IFNAME, session->name);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(m);
+
+        return 0;
+}
+
+static int link_get_l2tp_local_address(Link *link, L2tpTunnel *t, union in_addr_union *ret) {
+        Address *a;
+
+        assert(link);
+        assert(t);
+
+        SET_FOREACH(a, link->addresses) {
+                if (!address_is_ready(a))
+                        continue;
+
+                if (a->family != t->family)
+                        continue;
+
+                if (in_addr_is_set(a->family, &a->in_addr_peer))
+                        continue;
+
+                if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_STATIC &&
+                    !FLAGS_SET(a->flags, IFA_F_PERMANENT))
+                        continue;
+
+                if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC &&
+                    FLAGS_SET(a->flags, IFA_F_PERMANENT))
+                        continue;
+
+                if (ret)
+                        *ret = a->in_addr;
+        }
+
+        return -ENOENT;
+}
+
+static int l2tp_get_local_address(NetDev *netdev, union in_addr_union *ret) {
+        Link *link = NULL;
+        L2tpTunnel *t;
+        Address *a = NULL;
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+        assert_se(t = L2TP(netdev));
+
+        if (t->local_ifname) {
+                r = link_get_by_name(netdev->manager, t->local_ifname, &link);
+                if (r < 0)
+                        return r;
+
+                if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false))
+                        return -EBUSY;
+        }
+
+        if (netdev->manager->manage_foreign_routes) {
+                /* First, check if the remote address is accessible. */
+                if (link)
+                        r = link_address_is_reachable(link, t->family, &t->remote, &t->local, &a);
+                else
+                        r = manager_address_is_reachable(netdev->manager, t->family, &t->remote, &t->local, &a);
+                if (r < 0)
+                        return r;
+        }
+
+        if (in_addr_is_set(t->family, &t->local)) {
+                /* local address is explicitly specified. */
+
+                if (!a) {
+                        if (link)
+                                r = link_get_address(link, t->family, &t->local, 0, &a);
+                        else
+                                r = manager_get_address(netdev->manager, t->family, &t->local, 0, &a);
+                        if (r < 0)
+                                return r;
+
+                        if (!address_is_ready(a))
+                                return -EBUSY;
+                }
+
+                if (ret)
+                        *ret = a->in_addr;
+
+                return 0;
+        }
+
+        if (a) {
+                if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_STATIC &&
+                    !FLAGS_SET(a->flags, IFA_F_PERMANENT))
+                        return -EINVAL;
+
+                if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC &&
+                    FLAGS_SET(a->flags, IFA_F_PERMANENT))
+                        return -EINVAL;
+
+                if (ret)
+                        *ret = a->in_addr;
+
+                return 0;
+        }
+
+        if (link)
+                return link_get_l2tp_local_address(link, t, ret);
+
+        HASHMAP_FOREACH(link, netdev->manager->links_by_index) {
+                if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false))
+                        continue;
+
+                if (link_get_l2tp_local_address(link, t, ret) >= 0)
+                        return 0;
+        }
+
+        return -ENOENT;
+}
+
+static void l2tp_session_destroy_callback(L2tpSession *session) {
+        if (!session)
+                return;
+
+        netdev_unref(NETDEV(session->tunnel));
+}
+
+static int l2tp_create_session_handler(sd_netlink *rtnl, sd_netlink_message *m, L2tpSession *session) {
+        NetDev *netdev;
+        int r;
+
+        assert(session);
+        assert(session->tunnel);
+
+        netdev = NETDEV(session->tunnel);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev, "L2TP session %s exists, using existing without changing its parameters",
+                                session->name);
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "L2TP session %s could not be created: %m", session->name);
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "L2TP session %s created", session->name);
+        return 1;
+}
+
+static int l2tp_create_session(NetDev *netdev, L2tpSession *session) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *n = NULL;
+        int r;
+
+        r = netdev_l2tp_create_message_session(netdev, session, &n);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, n, l2tp_create_session_handler,
+                               l2tp_session_destroy_callback, session);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create L2TP session %s: %m", session->name);
+
+        netdev_ref(netdev);
+        return 0;
+}
+
+static int l2tp_create_tunnel_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        L2tpSession *session;
+        L2tpTunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        t = L2TP(netdev);
+
+        assert(t);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "L2TP tunnel is created");
+
+        ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section)
+                (void) l2tp_create_session(netdev, session);
+
+        return 1;
+}
+
+static int l2tp_create_tunnel(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        union in_addr_union local_address;
+        L2tpTunnel *t;
+        int r;
+
+        assert(netdev);
+        assert_se(t = L2TP(netdev));
+
+        r = l2tp_get_local_address(netdev, &local_address);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address.");
+
+        if (t->local_address_type >= 0 && DEBUG_LOGGING)
+                log_netdev_debug(netdev, "Local address %s acquired.",
+                                 IN_ADDR_TO_STRING(t->family, &local_address));
+
+        r = netdev_l2tp_create_message_tunnel(netdev, &local_address, &m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, l2tp_create_tunnel_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create L2TP tunnel: %m");
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+static int netdev_l2tp_is_ready_to_create(NetDev *netdev, Link *link) {
+        return l2tp_get_local_address(netdev, NULL) >= 0;
+}
+
+int config_parse_l2tp_tunnel_local_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_free_ char *addr_or_type = NULL, *ifname = NULL;
+        L2tpLocalAddressType type;
+        L2tpTunnel *t = ASSERT_PTR(userdata);
+        const char *p = ASSERT_PTR(rvalue);
+        union in_addr_union a;
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                t->local_ifname = mfree(t->local_ifname);
+                t->local_address_type = NETDEV_L2TP_LOCAL_ADDRESS_AUTO;
+                t->local = IN_ADDR_NULL;
+
+                if (!in_addr_is_set(t->family, &t->remote))
+                        /* If Remote= is not specified yet, then also clear family. */
+                        t->family = AF_UNSPEC;
+
+                return 0;
+        }
+
+        r = extract_first_word(&p, &addr_or_type, "@", 0);
+        if (r < 0)
+                return log_oom();
+        if (r == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid L2TP Tunnel address specified in %s=, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        if (!isempty(p)) {
+                if (!ifname_valid_full(p, IFNAME_VALID_ALTERNATIVE)) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid interface name specified in %s=, ignoring assignment: %s", lvalue, rvalue);
+                        return 0;
+                }
+
+                ifname = strdup(p);
+                if (!ifname)
+                        return log_oom();
+        }
+
+        type = l2tp_local_address_type_from_string(addr_or_type);
+        if (type >= 0) {
+                free_and_replace(t->local_ifname, ifname);
+                t->local_address_type = type;
+                t->local = IN_ADDR_NULL;
+
+                if (!in_addr_is_set(t->family, &t->remote))
+                        /* If Remote= is not specified yet, then also clear family. */
+                        t->family = AF_UNSPEC;
+
+                return 0;
+        }
+
+        r = in_addr_from_string_auto(addr_or_type, &f, &a);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Invalid L2TP Tunnel local address \"%s\" specified, ignoring assignment: %s", addr_or_type, rvalue);
+                return 0;
+        }
+
+        if (in_addr_is_null(f, &a)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "L2TP Tunnel local address cannot be null, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (t->family != AF_UNSPEC && t->family != f) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Address family does not match the previous assignment, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        t->family = f;
+        t->local = a;
+        free_and_replace(t->local_ifname, ifname);
+        t->local_address_type = _NETDEV_L2TP_LOCAL_ADDRESS_INVALID;
+        return 0;
+}
+
+int config_parse_l2tp_tunnel_remote_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        L2tpTunnel *t = ASSERT_PTR(userdata);
+        union in_addr_union a;
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                t->remote = IN_ADDR_NULL;
+
+                if (!in_addr_is_set(t->family, &t->local))
+                        /* If Local= is not specified yet, then also clear family. */
+                        t->family = AF_UNSPEC;
+
+                return 0;
+        }
+
+        r = in_addr_from_string_auto(rvalue, &f, &a);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Invalid L2TP Tunnel remote address specified, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (in_addr_is_null(f, &a)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "L2TP Tunnel remote address cannot be null, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (t->family != AF_UNSPEC && t->family != f) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Address family does not match the previous assignment, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        t->family = f;
+        t->remote = a;
+        return 0;
+}
+
+int config_parse_l2tp_tunnel_id(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint32_t *id = data, k;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou32(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse L2TP tunnel id. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (k == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid L2TP tunnel id. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        *id = k;
+
+        return 0;
+}
+
+int config_parse_l2tp_session_id(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+        L2tpTunnel *t = userdata;
+        uint32_t k;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = l2tp_session_new_static(t, filename, section_line, &session);
+        if (r < 0)
+                return log_oom();
+
+        r = safe_atou32(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse L2TP session id. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (k == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid L2TP session id. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (streq(lvalue, "SessionId"))
+                session->session_id = k;
+        else
+                session->peer_session_id = k;
+
+        session = NULL;
+        return 0;
+}
+
+int config_parse_l2tp_session_l2spec(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+        L2tpTunnel *t = userdata;
+        L2tpL2specType spec;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = l2tp_session_new_static(t, filename, section_line, &session);
+        if (r < 0)
+                return log_oom();
+
+        spec = l2tp_l2spec_type_from_string(rvalue);
+        if (spec < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, spec,
+                           "Failed to parse layer2 specific header type. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        session->l2tp_l2spec_type = spec;
+
+        session = NULL;
+        return 0;
+}
+
+int config_parse_l2tp_session_name(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+        L2tpTunnel *t = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = l2tp_session_new_static(t, filename, section_line, &session);
+        if (r < 0)
+                return log_oom();
+
+        if (!ifname_valid(rvalue)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Failed to parse L2TP tunnel session name. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        r = free_and_strdup(&session->name, rvalue);
+        if (r < 0)
+                return log_oom();
+
+        session = NULL;
+        return 0;
+}
+
+static void l2tp_tunnel_init(NetDev *netdev) {
+        L2tpTunnel *t;
+
+        assert(netdev);
+
+        t = L2TP(netdev);
+
+        assert(t);
+
+        t->l2tp_encap_type = NETDEV_L2TP_ENCAPTYPE_UDP;
+        t->udp6_csum_rx = true;
+        t->udp6_csum_tx = true;
+}
+
+static int l2tp_session_verify(L2tpSession *session) {
+        NetDev *netdev;
+
+        assert(session);
+        assert(session->tunnel);
+
+        netdev = NETDEV(session->tunnel);
+
+        if (section_is_invalid(session->section))
+                return -EINVAL;
+
+        if (!session->name)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: L2TP session without name configured. "
+                                              "Ignoring [L2TPSession] section from line %u",
+                                              session->section->filename, session->section->line);
+
+        if (session->session_id == 0 || session->peer_session_id == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: L2TP session without session IDs configured. "
+                                              "Ignoring [L2TPSession] section from line %u",
+                                              session->section->filename, session->section->line);
+
+        return 0;
+}
+
+static int netdev_l2tp_tunnel_verify(NetDev *netdev, const char *filename) {
+        L2tpTunnel *t;
+        L2tpSession *session;
+
+        assert(netdev);
+        assert(filename);
+
+        t = L2TP(netdev);
+
+        assert(t);
+
+        if (!IN_SET(t->family, AF_INET, AF_INET6))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: L2TP tunnel with invalid address family configured. Ignoring",
+                                              filename);
+
+        if (!in_addr_is_set(t->family, &t->remote))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: L2TP tunnel without a remote address configured. Ignoring",
+                                              filename);
+
+        if (t->tunnel_id == 0 || t->peer_tunnel_id == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: L2TP tunnel without tunnel IDs configured. Ignoring",
+                                              filename);
+
+        ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section)
+                if (l2tp_session_verify(session) < 0)
+                        l2tp_session_free(session);
+
+        return 0;
+}
+
+static void l2tp_tunnel_done(NetDev *netdev) {
+        L2tpTunnel *t;
+
+        assert(netdev);
+
+        t = L2TP(netdev);
+
+        assert(t);
+
+        ordered_hashmap_free_with_destructor(t->sessions_by_section, l2tp_session_free);
+        free(t->local_ifname);
+}
+
+const NetDevVTable l2tptnl_vtable = {
+        .object_size = sizeof(L2tpTunnel),
+        .init = l2tp_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "L2TP\0L2TPSession\0",
+        .create = l2tp_create_tunnel,
+        .done = l2tp_tunnel_done,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .is_ready_to_create = netdev_l2tp_is_ready_to_create,
+        .config_verify = netdev_l2tp_tunnel_verify,
+};
diff --git a/src/network/netdev/l2tp-tunnel.h b/src/network/netdev/l2tp-tunnel.h
new file mode 100644
index 0000000..6028b35
--- /dev/null
+++ b/src/network/netdev/l2tp-tunnel.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <netinet/in.h>
+#include <linux/l2tp.h>
+
+#include "in-addr-util.h"
+#include "netdev.h"
+#include "networkd-util.h"
+
+typedef enum L2tpL2specType {
+        NETDEV_L2TP_L2SPECTYPE_NONE = L2TP_L2SPECTYPE_NONE,
+        NETDEV_L2TP_L2SPECTYPE_DEFAULT = L2TP_L2SPECTYPE_DEFAULT,
+        _NETDEV_L2TP_L2SPECTYPE_MAX,
+        _NETDEV_L2TP_L2SPECTYPE_INVALID = -EINVAL,
+} L2tpL2specType;
+
+typedef enum L2tpEncapType {
+        NETDEV_L2TP_ENCAPTYPE_UDP = L2TP_ENCAPTYPE_UDP,
+        NETDEV_L2TP_ENCAPTYPE_IP = L2TP_ENCAPTYPE_IP,
+        _NETDEV_L2TP_ENCAPTYPE_MAX,
+        _NETDEV_L2TP_ENCAPTYPE_INVALID = -EINVAL,
+} L2tpEncapType;
+
+typedef enum L2tpLocalAddressType {
+        NETDEV_L2TP_LOCAL_ADDRESS_AUTO,
+        NETDEV_L2TP_LOCAL_ADDRESS_STATIC,
+        NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC,
+        _NETDEV_L2TP_LOCAL_ADDRESS_MAX,
+        _NETDEV_L2TP_LOCAL_ADDRESS_INVALID = -EINVAL,
+} L2tpLocalAddressType;
+
+typedef struct L2tpTunnel L2tpTunnel;
+
+typedef struct L2tpSession {
+        L2tpTunnel *tunnel;
+        ConfigSection *section;
+
+        char *name;
+
+        uint32_t session_id;
+        uint32_t peer_session_id;
+        L2tpL2specType l2tp_l2spec_type;
+} L2tpSession;
+
+struct L2tpTunnel {
+        NetDev meta;
+
+        uint16_t l2tp_udp_sport;
+        uint16_t l2tp_udp_dport;
+
+        uint32_t tunnel_id;
+        uint32_t peer_tunnel_id;
+
+        int family;
+
+        bool udp_csum;
+        bool udp6_csum_rx;
+        bool udp6_csum_tx;
+
+        char *local_ifname;
+        L2tpLocalAddressType local_address_type;
+        union in_addr_union local;
+        union in_addr_union remote;
+
+        L2tpEncapType l2tp_encap_type;
+
+        OrderedHashmap *sessions_by_section;
+};
+
+DEFINE_NETDEV_CAST(L2TP, L2tpTunnel);
+extern const NetDevVTable l2tptnl_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_tunnel_local_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_tunnel_remote_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_tunnel_id);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_encap_type);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_l2spec);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_id);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_name);
diff --git a/src/network/netdev/macsec.c b/src/network/netdev/macsec.c
new file mode 100644
index 0000000..1e3f6a9
--- /dev/null
+++ b/src/network/netdev/macsec.c
@@ -0,0 +1,1233 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_macsec.h>
+#include <linux/genetlink.h>
+
+#include "conf-parser.h"
+#include "fileio.h"
+#include "hashmap.h"
+#include "hexdecoct.h"
+#include "macsec.h"
+#include "memory-util.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-helpers.h"
+#include "socket-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+static void security_association_clear(SecurityAssociation *sa) {
+        if (!sa)
+                return;
+
+        explicit_bzero_safe(sa->key, sa->key_len);
+        free(sa->key);
+        free(sa->key_file);
+}
+
+static void security_association_init(SecurityAssociation *sa) {
+        assert(sa);
+
+        sa->activate = -1;
+        sa->use_for_encoding = -1;
+}
+
+static ReceiveAssociation* macsec_receive_association_free(ReceiveAssociation *c) {
+        if (!c)
+                return NULL;
+
+        if (c->macsec && c->section)
+                ordered_hashmap_remove(c->macsec->receive_associations_by_section, c->section);
+
+        config_section_free(c->section);
+        security_association_clear(&c->sa);
+
+        return mfree(c);
+}
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(ReceiveAssociation, macsec_receive_association_free);
+
+static int macsec_receive_association_new_static(MACsec *s, const char *filename, unsigned section_line, ReceiveAssociation **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(macsec_receive_association_freep) ReceiveAssociation *c = NULL;
+        int r;
+
+        assert(s);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        c = ordered_hashmap_get(s->receive_associations_by_section, n);
+        if (c) {
+                *ret = TAKE_PTR(c);
+                return 0;
+        }
+
+        c = new(ReceiveAssociation, 1);
+        if (!c)
+                return -ENOMEM;
+
+        *c = (ReceiveAssociation) {
+                .macsec = s,
+                .section = TAKE_PTR(n),
+        };
+
+        security_association_init(&c->sa);
+
+        r = ordered_hashmap_ensure_put(&s->receive_associations_by_section, &config_section_hash_ops, c->section, c);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(c);
+
+        return 0;
+}
+
+static ReceiveChannel* macsec_receive_channel_free(ReceiveChannel *c) {
+        if (!c)
+                return NULL;
+
+        if (c->macsec) {
+                if (c->sci.as_uint64 > 0)
+                        ordered_hashmap_remove_value(c->macsec->receive_channels, &c->sci.as_uint64, c);
+
+                if (c->section)
+                        ordered_hashmap_remove(c->macsec->receive_channels_by_section, c->section);
+        }
+
+        config_section_free(c->section);
+
+        return mfree(c);
+}
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(ReceiveChannel, macsec_receive_channel_free);
+
+static int macsec_receive_channel_new(MACsec *s, uint64_t sci, ReceiveChannel **ret) {
+        ReceiveChannel *c;
+
+        assert(s);
+
+        c = new(ReceiveChannel, 1);
+        if (!c)
+                return -ENOMEM;
+
+        *c = (ReceiveChannel) {
+                .macsec = s,
+                .sci.as_uint64 = sci,
+        };
+
+        *ret = c;
+        return 0;
+}
+
+static int macsec_receive_channel_new_static(MACsec *s, const char *filename, unsigned section_line, ReceiveChannel **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(macsec_receive_channel_freep) ReceiveChannel *c = NULL;
+        int r;
+
+        assert(s);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        c = ordered_hashmap_get(s->receive_channels_by_section, n);
+        if (c) {
+                *ret = TAKE_PTR(c);
+                return 0;
+        }
+
+        r = macsec_receive_channel_new(s, 0, &c);
+        if (r < 0)
+                return r;
+
+        c->section = TAKE_PTR(n);
+
+        r = ordered_hashmap_ensure_put(&s->receive_channels_by_section, &config_section_hash_ops, c->section, c);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(c);
+
+        return 0;
+}
+
+static TransmitAssociation* macsec_transmit_association_free(TransmitAssociation *a) {
+        if (!a)
+                return NULL;
+
+        if (a->macsec && a->section)
+                ordered_hashmap_remove(a->macsec->transmit_associations_by_section, a->section);
+
+        config_section_free(a->section);
+        security_association_clear(&a->sa);
+
+        return mfree(a);
+}
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(TransmitAssociation, macsec_transmit_association_free);
+
+static int macsec_transmit_association_new_static(MACsec *s, const char *filename, unsigned section_line, TransmitAssociation **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(macsec_transmit_association_freep) TransmitAssociation *a = NULL;
+        int r;
+
+        assert(s);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        a = ordered_hashmap_get(s->transmit_associations_by_section, n);
+        if (a) {
+                *ret = TAKE_PTR(a);
+                return 0;
+        }
+
+        a = new(TransmitAssociation, 1);
+        if (!a)
+                return -ENOMEM;
+
+        *a = (TransmitAssociation) {
+                .macsec = s,
+                .section = TAKE_PTR(n),
+        };
+
+        security_association_init(&a->sa);
+
+        r = ordered_hashmap_ensure_put(&s->transmit_associations_by_section, &config_section_hash_ops, a->section, a);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(a);
+
+        return 0;
+}
+
+static int netdev_macsec_create_message(NetDev *netdev, int command, sd_netlink_message **ret) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(netdev->ifindex > 0);
+
+        r = sd_genl_message_new(netdev->manager->genl, MACSEC_GENL_NAME, command, &m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, MACSEC_ATTR_IFINDEX, netdev->ifindex);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(m);
+
+        return 0;
+}
+
+static int netdev_macsec_fill_message_sci(NetDev *netdev, MACsecSCI *sci, sd_netlink_message *m) {
+        int r;
+
+        assert(netdev);
+        assert(m);
+        assert(sci);
+
+        r = sd_netlink_message_open_container(m, MACSEC_ATTR_RXSC_CONFIG);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u64(m, MACSEC_RXSC_ATTR_SCI, sci->as_uint64);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_macsec_fill_message_sa(NetDev *netdev, SecurityAssociation *a, sd_netlink_message *m) {
+        int r;
+
+        assert(netdev);
+        assert(a);
+        assert(m);
+
+        r = sd_netlink_message_open_container(m, MACSEC_ATTR_SA_CONFIG);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, MACSEC_SA_ATTR_AN, a->association_number);
+        if (r < 0)
+                return r;
+
+        if (a->packet_number > 0) {
+                r = sd_netlink_message_append_u32(m, MACSEC_SA_ATTR_PN, a->packet_number);
+                if (r < 0)
+                        return r;
+        }
+
+        if (a->key_len > 0) {
+                r = sd_netlink_message_append_data(m, MACSEC_SA_ATTR_KEYID, a->key_id, MACSEC_KEYID_LEN);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_data(m, MACSEC_SA_ATTR_KEY, a->key, a->key_len);
+                if (r < 0)
+                        return r;
+        }
+
+        if (a->activate >= 0) {
+                r = sd_netlink_message_append_u8(m, MACSEC_SA_ATTR_ACTIVE, a->activate);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int macsec_receive_association_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev,
+                                "MACsec receive secure association exists, using it without changing parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r,
+                                         "Failed to add receive secure association: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Receive secure association is configured");
+
+        return 1;
+}
+
+static int netdev_macsec_configure_receive_association(NetDev *netdev, ReceiveAssociation *a) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(a);
+
+        r = netdev_macsec_create_message(netdev, MACSEC_CMD_ADD_RXSA, &m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m");
+
+        r = netdev_macsec_fill_message_sa(netdev, &a->sa, m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to fill netlink message: %m");
+
+        r = netdev_macsec_fill_message_sci(netdev, &a->sci, m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to fill netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, macsec_receive_association_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to configure receive secure association: %m");
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+static int macsec_receive_channel_handler(sd_netlink *rtnl, sd_netlink_message *m, ReceiveChannel *c) {
+        NetDev *netdev;
+        int r;
+
+        assert(c);
+        assert(c->macsec);
+
+        netdev = NETDEV(c->macsec);
+
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_debug(netdev,
+                                 "MACsec receive channel exists, using it without changing parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r,
+                                         "Failed to add receive secure channel: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Receive channel is configured");
+
+        for (unsigned i = 0; i < c->n_rxsa; i++) {
+                r = netdev_macsec_configure_receive_association(netdev, c->rxsa[i]);
+                if (r < 0) {
+                        log_netdev_warning_errno(netdev, r,
+                                                 "Failed to configure receive security association: %m");
+                        netdev_enter_failed(netdev);
+                        return 1;
+                }
+        }
+
+        return 1;
+}
+
+static void receive_channel_destroy_callback(ReceiveChannel *c) {
+        assert(c);
+        assert(c->macsec);
+
+        netdev_unref(NETDEV(c->macsec));
+}
+
+static int netdev_macsec_configure_receive_channel(NetDev *netdev, ReceiveChannel *c) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(c);
+
+        r = netdev_macsec_create_message(netdev, MACSEC_CMD_ADD_RXSC, &m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m");
+
+        r = netdev_macsec_fill_message_sci(netdev, &c->sci, m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to fill netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, macsec_receive_channel_handler,
+                               receive_channel_destroy_callback, c);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to configure receive channel: %m");
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+static int macsec_transmit_association_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev,
+                                "MACsec transmit secure association exists, using it without changing parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r,
+                                         "Failed to add transmit secure association: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Transmit secure association is configured");
+
+        return 1;
+}
+
+static int netdev_macsec_configure_transmit_association(NetDev *netdev, TransmitAssociation *a) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(a);
+
+        r = netdev_macsec_create_message(netdev, MACSEC_CMD_ADD_TXSA, &m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m");
+
+        r = netdev_macsec_fill_message_sa(netdev, &a->sa, m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to fill netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, macsec_transmit_association_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Failed to configure transmit secure association: %m");
+
+        netdev_ref(netdev);
+
+        return 0;
+}
+
+static int netdev_macsec_configure(NetDev *netdev, Link *link) {
+        TransmitAssociation *a;
+        ReceiveChannel *c;
+        MACsec *s;
+        int r;
+
+        assert(netdev);
+        s = MACSEC(netdev);
+        assert(s);
+
+        ORDERED_HASHMAP_FOREACH(a, s->transmit_associations_by_section) {
+                r = netdev_macsec_configure_transmit_association(netdev, a);
+                if (r < 0)
+                        return r;
+        }
+
+        ORDERED_HASHMAP_FOREACH(c, s->receive_channels) {
+                r = netdev_macsec_configure_receive_channel(netdev, c);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int netdev_macsec_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        MACsec *v;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        v = MACSEC(netdev);
+
+        assert(v);
+
+        if (v->port > 0) {
+                r = sd_netlink_message_append_u16(m, IFLA_MACSEC_PORT, v->port);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->encrypt >= 0) {
+                r = sd_netlink_message_append_u8(m, IFLA_MACSEC_ENCRYPT, v->encrypt);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_MACSEC_ENCODING_SA, v->encoding_an);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_macsec_port(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        _cleanup_(macsec_receive_channel_free_or_set_invalidp) ReceiveChannel *c = NULL;
+        MACsec *s = userdata;
+        uint16_t port;
+        void *dest;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* This parses port used to make Secure Channel Identifier (SCI) */
+
+        if (streq(section, "MACsec"))
+                dest = &s->port;
+        else if (streq(section, "MACsecReceiveChannel")) {
+                r = macsec_receive_channel_new_static(s, filename, section_line, &c);
+                if (r < 0)
+                        return log_oom();
+
+                dest = &c->sci.port;
+        } else {
+                assert(streq(section, "MACsecReceiveAssociation"));
+
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+                if (r < 0)
+                        return log_oom();
+
+                dest = &b->sci.port;
+        }
+
+        r = parse_ip_port(rvalue, &port);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse port '%s' for secure channel identifier. Ignoring assignment: %m",
+                           rvalue);
+                return 0;
+        }
+
+        unaligned_write_be16(dest, port);
+
+        TAKE_PTR(b);
+        TAKE_PTR(c);
+
+        return 0;
+}
+
+int config_parse_macsec_hw_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        _cleanup_(macsec_receive_channel_free_or_set_invalidp) ReceiveChannel *c = NULL;
+        MACsec *s = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "MACsecReceiveChannel"))
+                r = macsec_receive_channel_new_static(s, filename, section_line, &c);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        r = parse_ether_addr(rvalue, b ? &b->sci.mac : &c->sci.mac);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse MAC address for secure channel identifier. "
+                           "Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(b);
+        TAKE_PTR(c);
+
+        return 0;
+}
+
+int config_parse_macsec_packet_number(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        MACsec *s = userdata;
+        uint32_t val, *dest;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "MACsecTransmitAssociation"))
+                r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        dest = a ? &a->sa.packet_number : &b->sa.packet_number;
+
+        r = safe_atou32(rvalue, &val);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse packet number. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+        if (streq(section, "MACsecTransmitAssociation") && val == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid packet number. Ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        *dest = val;
+        TAKE_PTR(a);
+        TAKE_PTR(b);
+
+        return 0;
+}
+
+int config_parse_macsec_key(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        _cleanup_(erase_and_freep) void *p = NULL;
+        MACsec *s = userdata;
+        SecurityAssociation *dest;
+        size_t l;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        (void) warn_file_is_world_accessible(filename, NULL, unit, line);
+
+        if (streq(section, "MACsecTransmitAssociation"))
+                r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        dest = a ? &a->sa : &b->sa;
+
+        r = unhexmem_full(rvalue, strlen(rvalue), true, &p, &l);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse key. Ignoring assignment: %m");
+                return 0;
+        }
+
+        if (l != 16) {
+                /* See DEFAULT_SAK_LEN in drivers/net/macsec.c */
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid key length (%zu). Ignoring assignment", l);
+                return 0;
+        }
+
+        explicit_bzero_safe(dest->key, dest->key_len);
+        free_and_replace(dest->key, p);
+        dest->key_len = l;
+
+        TAKE_PTR(a);
+        TAKE_PTR(b);
+
+        return 0;
+}
+
+int config_parse_macsec_key_file(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        _cleanup_free_ char *path = NULL;
+        MACsec *s = userdata;
+        char **dest;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "MACsecTransmitAssociation"))
+                r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        dest = a ? &a->sa.key_file : &b->sa.key_file;
+
+        if (isempty(rvalue)) {
+                *dest = mfree(*dest);
+                return 0;
+        }
+
+        path = strdup(rvalue);
+        if (!path)
+                return log_oom();
+
+        if (path_simplify_and_warn(path, PATH_CHECK_ABSOLUTE, unit, filename, line, lvalue) < 0)
+                return 0;
+
+        free_and_replace(*dest, path);
+        TAKE_PTR(a);
+        TAKE_PTR(b);
+
+        return 0;
+}
+
+int config_parse_macsec_key_id(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        _cleanup_free_ void *p = NULL;
+        MACsec *s = userdata;
+        uint8_t *dest;
+        size_t l;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "MACsecTransmitAssociation"))
+                r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        r = unhexmem(rvalue, strlen(rvalue), &p, &l);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse KeyId=%s, ignoring assignment: %m", rvalue);
+                return 0;
+        }
+        if (l > MACSEC_KEYID_LEN) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified KeyId= is larger then the allowed maximum (%zu > %i), ignoring: %s",
+                           l, MACSEC_KEYID_LEN, rvalue);
+                return 0;
+        }
+
+        dest = a ? a->sa.key_id : b->sa.key_id;
+        memcpy_safe(dest, p, l);
+        memzero(dest + l, MACSEC_KEYID_LEN - l);
+
+        TAKE_PTR(a);
+        TAKE_PTR(b);
+
+        return 0;
+}
+
+int config_parse_macsec_sa_activate(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        _cleanup_(macsec_receive_association_free_or_set_invalidp) ReceiveAssociation *b = NULL;
+        MACsec *s = userdata;
+        int *dest;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(section, "MACsecTransmitAssociation"))
+                r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        else
+                r = macsec_receive_association_new_static(s, filename, section_line, &b);
+        if (r < 0)
+                return log_oom();
+
+        dest = a ? &a->sa.activate : &b->sa.activate;
+
+        if (isempty(rvalue))
+                r = -1;
+        else {
+                r = parse_boolean(rvalue);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse activation mode of %s security association. "
+                                   "Ignoring assignment: %s",
+                                   streq(section, "MACsecTransmitAssociation") ? "transmit" : "receive",
+                                   rvalue);
+                        return 0;
+                }
+        }
+
+        *dest = r;
+        TAKE_PTR(a);
+        TAKE_PTR(b);
+
+        return 0;
+}
+
+int config_parse_macsec_use_for_encoding(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(macsec_transmit_association_free_or_set_invalidp) TransmitAssociation *a = NULL;
+        MACsec *s = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = macsec_transmit_association_new_static(s, filename, section_line, &a);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                a->sa.use_for_encoding = -1;
+                TAKE_PTR(a);
+                return 0;
+        }
+
+        r = parse_boolean(rvalue);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse %s= setting. Ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        a->sa.use_for_encoding = r;
+        if (a->sa.use_for_encoding > 0)
+                a->sa.activate = true;
+
+        TAKE_PTR(a);
+
+        return 0;
+}
+
+static int macsec_read_key_file(NetDev *netdev, SecurityAssociation *sa) {
+        _cleanup_(erase_and_freep) uint8_t *key = NULL;
+        size_t key_len;
+        int r;
+
+        assert(netdev);
+        assert(sa);
+
+        if (!sa->key_file)
+                return 0;
+
+        r = read_full_file_full(
+                        AT_FDCWD, sa->key_file, UINT64_MAX, SIZE_MAX,
+                        READ_FULL_FILE_SECURE | READ_FULL_FILE_UNHEX | READ_FULL_FILE_WARN_WORLD_READABLE | READ_FULL_FILE_CONNECT_SOCKET,
+                        NULL, (char **) &key, &key_len);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r,
+                                              "Failed to read key from '%s', ignoring: %m",
+                                              sa->key_file);
+
+        if (key_len != 16)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "Invalid key length (%zu bytes), ignoring: %m", key_len);
+
+        explicit_bzero_safe(sa->key, sa->key_len);
+        free_and_replace(sa->key, key);
+        sa->key_len = key_len;
+
+        return 0;
+}
+
+static int macsec_receive_channel_verify(ReceiveChannel *c) {
+        NetDev *netdev;
+        int r;
+
+        assert(c);
+        assert(c->macsec);
+
+        netdev = NETDEV(c->macsec);
+
+        if (section_is_invalid(c->section))
+                return -EINVAL;
+
+        if (ether_addr_is_null(&c->sci.mac))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec receive channel without MAC address configured. "
+                                              "Ignoring [MACsecReceiveChannel] section from line %u",
+                                              c->section->filename, c->section->line);
+
+        if (c->sci.port == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec receive channel without port configured. "
+                                              "Ignoring [MACsecReceiveChannel] section from line %u",
+                                              c->section->filename, c->section->line);
+
+        r = ordered_hashmap_ensure_put(&c->macsec->receive_channels, &uint64_hash_ops, &c->sci.as_uint64, c);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r == -EEXIST)
+                return log_netdev_error_errno(netdev, r,
+                                              "%s: Multiple [MACsecReceiveChannel] sections have same SCI, "
+                                              "Ignoring [MACsecReceiveChannel] section from line %u",
+                                              c->section->filename, c->section->line);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r,
+                                              "%s: Failed to store [MACsecReceiveChannel] section at hashmap, "
+                                              "Ignoring [MACsecReceiveChannel] section from line %u",
+                                              c->section->filename, c->section->line);
+        return 0;
+}
+
+static int macsec_transmit_association_verify(TransmitAssociation *t) {
+        NetDev *netdev;
+        int r;
+
+        assert(t);
+        assert(t->macsec);
+
+        netdev = NETDEV(t->macsec);
+
+        if (section_is_invalid(t->section))
+                return -EINVAL;
+
+        if (t->sa.packet_number == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec transmit secure association without PacketNumber= configured. "
+                                              "Ignoring [MACsecTransmitAssociation] section from line %u",
+                                              t->section->filename, t->section->line);
+
+        r = macsec_read_key_file(netdev, &t->sa);
+        if (r < 0)
+                return r;
+
+        if (t->sa.key_len <= 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec transmit secure association without key configured. "
+                                              "Ignoring [MACsecTransmitAssociation] section from line %u",
+                                              t->section->filename, t->section->line);
+
+        return 0;
+}
+
+static int macsec_receive_association_verify(ReceiveAssociation *a) {
+        ReceiveChannel *c;
+        NetDev *netdev;
+        int r;
+
+        assert(a);
+        assert(a->macsec);
+
+        netdev = NETDEV(a->macsec);
+
+        if (section_is_invalid(a->section))
+                return -EINVAL;
+
+        r = macsec_read_key_file(netdev, &a->sa);
+        if (r < 0)
+                return r;
+
+        if (a->sa.key_len <= 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec receive secure association without key configured. "
+                                              "Ignoring [MACsecReceiveAssociation] section from line %u",
+                                              a->section->filename, a->section->line);
+
+        if (ether_addr_is_null(&a->sci.mac))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec receive secure association without MAC address configured. "
+                                              "Ignoring [MACsecReceiveAssociation] section from line %u",
+                                              a->section->filename, a->section->line);
+
+        if (a->sci.port == 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: MACsec receive secure association without port configured. "
+                                              "Ignoring [MACsecReceiveAssociation] section from line %u",
+                                              a->section->filename, a->section->line);
+
+        c = ordered_hashmap_get(a->macsec->receive_channels, &a->sci.as_uint64);
+        if (!c) {
+                _cleanup_(macsec_receive_channel_freep) ReceiveChannel *new_channel = NULL;
+
+                r = macsec_receive_channel_new(a->macsec, a->sci.as_uint64, &new_channel);
+                if (r < 0)
+                        return log_oom();
+
+                r = ordered_hashmap_ensure_put(&a->macsec->receive_channels, &uint64_hash_ops, &new_channel->sci.as_uint64, new_channel);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r,
+                                                      "%s: Failed to store receive channel at hashmap, "
+                                                      "Ignoring [MACsecReceiveAssociation] section from line %u",
+                                                      a->section->filename, a->section->line);
+                c = TAKE_PTR(new_channel);
+        }
+        if (c->n_rxsa >= MACSEC_MAX_ASSOCIATION_NUMBER)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(ERANGE),
+                                              "%s: Too many [MACsecReceiveAssociation] sections for the same receive channel, "
+                                              "Ignoring [MACsecReceiveAssociation] section from line %u",
+                                              a->section->filename, a->section->line);
+
+        a->sa.association_number = c->n_rxsa;
+        c->rxsa[c->n_rxsa++] = a;
+
+        return 0;
+}
+
+static int netdev_macsec_verify(NetDev *netdev, const char *filename) {
+        MACsec *v = MACSEC(netdev);
+        TransmitAssociation *a;
+        ReceiveAssociation *n;
+        ReceiveChannel *c;
+        uint8_t an, encoding_an;
+        bool use_for_encoding;
+        int r;
+
+        assert(netdev);
+        assert(v);
+        assert(filename);
+
+        ORDERED_HASHMAP_FOREACH(c, v->receive_channels_by_section) {
+                r = macsec_receive_channel_verify(c);
+                if (r < 0)
+                        macsec_receive_channel_free(c);
+        }
+
+        an = 0;
+        use_for_encoding = false;
+        encoding_an = 0;
+        ORDERED_HASHMAP_FOREACH(a, v->transmit_associations_by_section) {
+                r = macsec_transmit_association_verify(a);
+                if (r < 0) {
+                        macsec_transmit_association_free(a);
+                        continue;
+                }
+
+                if (an >= MACSEC_MAX_ASSOCIATION_NUMBER) {
+                        log_netdev_error(netdev,
+                                         "%s: Too many [MACsecTransmitAssociation] sections configured. "
+                                         "Ignoring [MACsecTransmitAssociation] section from line %u",
+                                         a->section->filename, a->section->line);
+                        macsec_transmit_association_free(a);
+                        continue;
+                }
+
+                a->sa.association_number = an++;
+
+                if (a->sa.use_for_encoding > 0) {
+                        if (use_for_encoding) {
+                                log_netdev_warning(netdev,
+                                                   "%s: Multiple security associations are set to be used for transmit channel."
+                                                   "Disabling UseForEncoding= in [MACsecTransmitAssociation] section from line %u",
+                                                   a->section->filename, a->section->line);
+                                a->sa.use_for_encoding = false;
+                        } else {
+                                encoding_an = a->sa.association_number;
+                                use_for_encoding = true;
+                        }
+                }
+        }
+
+        assert(encoding_an < MACSEC_MAX_ASSOCIATION_NUMBER);
+        v->encoding_an = encoding_an;
+
+        ORDERED_HASHMAP_FOREACH(n, v->receive_associations_by_section) {
+                r = macsec_receive_association_verify(n);
+                if (r < 0)
+                        macsec_receive_association_free(n);
+        }
+
+        return 0;
+}
+
+static void macsec_init(NetDev *netdev) {
+        MACsec *v;
+
+        assert(netdev);
+
+        v = MACSEC(netdev);
+
+        assert(v);
+
+        v->encrypt = -1;
+}
+
+static void macsec_done(NetDev *netdev) {
+        MACsec *t;
+
+        assert(netdev);
+
+        t = MACSEC(netdev);
+
+        assert(t);
+
+        ordered_hashmap_free_with_destructor(t->receive_channels, macsec_receive_channel_free);
+        ordered_hashmap_free_with_destructor(t->receive_channels_by_section, macsec_receive_channel_free);
+        ordered_hashmap_free_with_destructor(t->transmit_associations_by_section, macsec_transmit_association_free);
+        ordered_hashmap_free_with_destructor(t->receive_associations_by_section, macsec_receive_association_free);
+}
+
+const NetDevVTable macsec_vtable = {
+        .object_size = sizeof(MACsec),
+        .init = macsec_init,
+        .sections = NETDEV_COMMON_SECTIONS "MACsec\0MACsecReceiveChannel\0MACsecTransmitAssociation\0MACsecReceiveAssociation\0",
+        .fill_message_create = netdev_macsec_fill_message_create,
+        .post_create = netdev_macsec_configure,
+        .done = macsec_done,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_macsec_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/macsec.h b/src/network/netdev/macsec.h
new file mode 100644
index 0000000..17bb1ca
--- /dev/null
+++ b/src/network/netdev/macsec.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <netinet/in.h>
+#include <linux/if_macsec.h>
+
+#include "ether-addr-util.h"
+#include "in-addr-util.h"
+#include "netdev.h"
+#include "networkd-util.h"
+#include "sparse-endian.h"
+
+/* See the definition of MACSEC_NUM_AN in kernel's drivers/net/macsec.c */
+#define MACSEC_MAX_ASSOCIATION_NUMBER 4
+
+typedef struct MACsec MACsec;
+
+typedef union MACsecSCI {
+        uint64_t as_uint64;
+
+        struct {
+                struct ether_addr mac;
+                be16_t port;
+        } _packed_;
+} MACsecSCI;
+
+assert_cc(sizeof(MACsecSCI) == sizeof(uint64_t));
+
+typedef struct SecurityAssociation {
+        uint8_t association_number;
+        uint32_t packet_number;
+        uint8_t key_id[MACSEC_KEYID_LEN];
+        uint8_t *key;
+        uint32_t key_len;
+        char *key_file;
+        int activate;
+        int use_for_encoding;
+} SecurityAssociation;
+
+typedef struct TransmitAssociation {
+        MACsec *macsec;
+        ConfigSection *section;
+
+        SecurityAssociation sa;
+} TransmitAssociation;
+
+typedef struct ReceiveAssociation {
+        MACsec *macsec;
+        ConfigSection *section;
+
+        MACsecSCI sci;
+        SecurityAssociation sa;
+} ReceiveAssociation;
+
+typedef struct ReceiveChannel {
+        MACsec *macsec;
+        ConfigSection *section;
+
+        MACsecSCI sci;
+        ReceiveAssociation *rxsa[MACSEC_MAX_ASSOCIATION_NUMBER];
+        unsigned n_rxsa;
+} ReceiveChannel;
+
+struct MACsec {
+        NetDev meta;
+
+        uint16_t port;
+        int encrypt;
+        uint8_t encoding_an;
+
+        OrderedHashmap *receive_channels;
+        OrderedHashmap *receive_channels_by_section;
+        OrderedHashmap *transmit_associations_by_section;
+        OrderedHashmap *receive_associations_by_section;
+};
+
+DEFINE_NETDEV_CAST(MACSEC, MACsec);
+extern const NetDevVTable macsec_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_port);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_hw_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_packet_number);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_key_id);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_key);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_key_file);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_sa_activate);
+CONFIG_PARSER_PROTOTYPE(config_parse_macsec_use_for_encoding);
diff --git a/src/network/netdev/macvlan.c b/src/network/netdev/macvlan.c
new file mode 100644
index 0000000..1114bb0
--- /dev/null
+++ b/src/network/netdev/macvlan.c
@@ -0,0 +1,170 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "conf-parser.h"
+#include "macvlan.h"
+#include "macvlan-util.h"
+#include "networkd-network.h"
+#include "parse-util.h"
+
+DEFINE_CONFIG_PARSE_ENUM(config_parse_macvlan_mode, macvlan_mode, MacVlanMode, "Failed to parse macvlan mode");
+
+static int netdev_macvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        MacVlan *m;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(netdev->ifname);
+        assert(link->network);
+
+        if (netdev->kind == NETDEV_KIND_MACVLAN)
+                m = MACVLAN(netdev);
+        else
+                m = MACVTAP(netdev);
+
+        assert(m);
+
+        if (m->mode == NETDEV_MACVLAN_MODE_SOURCE && !set_isempty(m->match_source_mac)) {
+                const struct ether_addr *mac_addr;
+
+                r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MACADDR_MODE, MACVLAN_MACADDR_SET);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_open_container(req, IFLA_MACVLAN_MACADDR_DATA);
+                if (r < 0)
+                        return r;
+
+                SET_FOREACH(mac_addr, m->match_source_mac) {
+                        r = sd_netlink_message_append_ether_addr(req, IFLA_MACVLAN_MACADDR, mac_addr);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return r;
+        }
+
+        if (m->mode != _NETDEV_MACVLAN_MODE_INVALID) {
+                r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MODE, m->mode);
+                if (r < 0)
+                        return r;
+        }
+
+        /* set the nopromisc flag if Promiscuous= of the link is explicitly set to false */
+        if (m->mode == NETDEV_MACVLAN_MODE_PASSTHRU && link->network->promiscuous == 0) {
+                r = sd_netlink_message_append_u16(req, IFLA_MACVLAN_FLAGS, MACVLAN_FLAG_NOPROMISC);
+                if (r < 0)
+                        return r;
+        }
+
+        if (m->bc_queue_length != UINT32_MAX) {
+                r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_BC_QUEUE_LEN, m->bc_queue_length);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int config_parse_macvlan_broadcast_queue_size(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        MacVlan *m = ASSERT_PTR(userdata);
+        uint32_t v;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (isempty(rvalue)) {
+                m->bc_queue_length = UINT32_MAX;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &v);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse BroadcastMulticastQueueLength=%s, ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        if (v == UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid BroadcastMulticastQueueLength=%s, ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        m->bc_queue_length = v;
+        return 0;
+}
+
+static void macvlan_done(NetDev *n) {
+        MacVlan *m;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_MACVLAN)
+                m = MACVLAN(n);
+        else
+                m = MACVTAP(n);
+
+        assert(m);
+
+        set_free(m->match_source_mac);
+}
+
+static void macvlan_init(NetDev *n) {
+        MacVlan *m;
+
+        assert(n);
+
+        if (n->kind == NETDEV_KIND_MACVLAN)
+                m = MACVLAN(n);
+        else
+                m = MACVTAP(n);
+
+        assert(m);
+
+        m->mode = _NETDEV_MACVLAN_MODE_INVALID;
+        m->bc_queue_length = UINT32_MAX;
+}
+
+const NetDevVTable macvtap_vtable = {
+        .object_size = sizeof(MacVlan),
+        .init = macvlan_init,
+        .done = macvlan_done,
+        .sections = NETDEV_COMMON_SECTIONS "MACVTAP\0",
+        .fill_message_create = netdev_macvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
+
+const NetDevVTable macvlan_vtable = {
+        .object_size = sizeof(MacVlan),
+        .init = macvlan_init,
+        .done = macvlan_done,
+        .sections = NETDEV_COMMON_SECTIONS "MACVLAN\0",
+        .fill_message_create = netdev_macvlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/macvlan.h b/src/network/netdev/macvlan.h
new file mode 100644
index 0000000..c45fc4f
--- /dev/null
+++ b/src/network/netdev/macvlan.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct MacVlan MacVlan;
+
+#include "macvlan-util.h"
+#include "netdev.h"
+#include "set.h"
+
+struct MacVlan {
+        NetDev meta;
+
+        MacVlanMode mode;
+        Set *match_source_mac;
+
+        uint32_t bc_queue_length;
+};
+
+DEFINE_NETDEV_CAST(MACVLAN, MacVlan);
+DEFINE_NETDEV_CAST(MACVTAP, MacVlan);
+extern const NetDevVTable macvlan_vtable;
+extern const NetDevVTable macvtap_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_macvlan_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_macvlan_broadcast_queue_size);
diff --git a/src/network/netdev/netdev-gperf.gperf b/src/network/netdev/netdev-gperf.gperf
new file mode 100644
index 0000000..3cfcd51
--- /dev/null
+++ b/src/network/netdev/netdev-gperf.gperf
@@ -0,0 +1,270 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+%{
+#if __GNUC__ >= 7
+_Pragma("GCC diagnostic ignored \"-Wimplicit-fallthrough\"")
+#endif
+#include <stddef.h>
+#include "bareudp.h"
+#include "batadv.h"
+#include "bond.h"
+#include "bridge.h"
+#include "conf-parser.h"
+#include "fou-tunnel.h"
+#include "geneve.h"
+#include "ipoib.h"
+#include "ipvlan.h"
+#include "l2tp-tunnel.h"
+#include "macsec.h"
+#include "macvlan.h"
+#include "net-condition.h"
+#include "netdev.h"
+#include "tunnel.h"
+#include "tuntap.h"
+#include "veth.h"
+#include "vlan-util.h"
+#include "vlan.h"
+#include "vrf.h"
+#include "vxcan.h"
+#include "vxlan.h"
+#include "wireguard.h"
+#include "wlan.h"
+#include "xfrm.h"
+%}
+struct ConfigPerfItem;
+%null_strings
+%language=ANSI-C
+%define slot-name section_and_lvalue
+%define hash-function-name network_netdev_gperf_hash
+%define lookup-function-name network_netdev_gperf_lookup
+%readonly-tables
+%omit-struct-type
+%struct-type
+%includes
+%%
+Match.Host,                               config_parse_net_condition,                CONDITION_HOST,                offsetof(NetDev, conditions)
+Match.Virtualization,                     config_parse_net_condition,                CONDITION_VIRTUALIZATION,      offsetof(NetDev, conditions)
+Match.KernelCommandLine,                  config_parse_net_condition,                CONDITION_KERNEL_COMMAND_LINE, offsetof(NetDev, conditions)
+Match.KernelVersion,                      config_parse_net_condition,                CONDITION_KERNEL_VERSION,      offsetof(NetDev, conditions)
+Match.Credential,                         config_parse_net_condition,                CONDITION_CREDENTIAL,          offsetof(NetDev, conditions)
+Match.Architecture,                       config_parse_net_condition,                CONDITION_ARCHITECTURE,        offsetof(NetDev, conditions)
+Match.Firmware,                           config_parse_net_condition,                CONDITION_FIRMWARE,            offsetof(NetDev, conditions)
+NetDev.Description,                       config_parse_string,                       0,                             offsetof(NetDev, description)
+NetDev.Name,                              config_parse_ifname,                       0,                             offsetof(NetDev, ifname)
+NetDev.Kind,                              config_parse_netdev_kind,                  0,                             offsetof(NetDev, kind)
+NetDev.MTUBytes,                          config_parse_mtu,                          AF_UNSPEC,                     offsetof(NetDev, mtu)
+NetDev.MACAddress,                        config_parse_netdev_hw_addr,               ETH_ALEN,                      offsetof(NetDev, hw_addr)
+VLAN.Id,                                  config_parse_vlanid,                       0,                             offsetof(VLan, id)
+VLAN.Protocol,                            config_parse_vlanprotocol,                 0,                             offsetof(VLan, protocol)
+VLAN.GVRP,                                config_parse_tristate,                     0,                             offsetof(VLan, gvrp)
+VLAN.MVRP,                                config_parse_tristate,                     0,                             offsetof(VLan, mvrp)
+VLAN.LooseBinding,                        config_parse_tristate,                     0,                             offsetof(VLan, loose_binding)
+VLAN.ReorderHeader,                       config_parse_tristate,                     0,                             offsetof(VLan, reorder_hdr)
+VLAN.EgressQOSMaps,                       config_parse_vlan_qos_maps,                0,                             offsetof(VLan, egress_qos_maps)
+VLAN.IngressQOSMaps,                      config_parse_vlan_qos_maps,                0,                             offsetof(VLan, ingress_qos_maps)
+MACVLAN.Mode,                             config_parse_macvlan_mode,                 0,                             offsetof(MacVlan, mode)
+MACVLAN.SourceMACAddress,                 config_parse_ether_addrs,                  0,                             offsetof(MacVlan, match_source_mac)
+MACVLAN.BroadcastMulticastQueueLength,    config_parse_macvlan_broadcast_queue_size, 0,                             offsetof(MacVlan, bc_queue_length)
+MACVTAP.Mode,                             config_parse_macvlan_mode,                 0,                             offsetof(MacVlan, mode)
+MACVTAP.SourceMACAddress,                 config_parse_ether_addrs,                  0,                             offsetof(MacVlan, match_source_mac)
+IPVLAN.Mode,                              config_parse_ipvlan_mode,                  0,                             offsetof(IPVlan, mode)
+IPVLAN.Flags,                             config_parse_ipvlan_flags,                 0,                             offsetof(IPVlan, flags)
+IPVTAP.Mode,                              config_parse_ipvlan_mode,                  0,                             offsetof(IPVlan, mode)
+IPVTAP.Flags,                             config_parse_ipvlan_flags,                 0,                             offsetof(IPVlan, flags)
+Tunnel.Local,                             config_parse_tunnel_local_address,         0,                             0
+Tunnel.Remote,                            config_parse_tunnel_remote_address,        0,                             0
+Tunnel.TOS,                               config_parse_unsigned,                     0,                             offsetof(Tunnel, tos)
+Tunnel.TTL,                               config_parse_unsigned,                     0,                             offsetof(Tunnel, ttl)
+Tunnel.Key,                               config_parse_tunnel_key,                   0,                             offsetof(Tunnel, key)
+Tunnel.InputKey,                          config_parse_tunnel_key,                   0,                             offsetof(Tunnel, ikey)
+Tunnel.OutputKey,                         config_parse_tunnel_key,                   0,                             offsetof(Tunnel, okey)
+Tunnel.DiscoverPathMTU,                   config_parse_bool,                         0,                             offsetof(Tunnel, pmtudisc)
+Tunnel.Mode,                              config_parse_ip6tnl_mode,                  0,                             offsetof(Tunnel, ip6tnl_mode)
+Tunnel.IPv6FlowLabel,                     config_parse_ipv6_flowlabel,               0,                             0
+Tunnel.CopyDSCP,                          config_parse_bool,                         0,                             offsetof(Tunnel, copy_dscp)
+Tunnel.EncapsulationLimit,                config_parse_encap_limit,                  0,                             0
+Tunnel.Independent,                       config_parse_bool,                         0,                             offsetof(Tunnel, independent)
+Tunnel.AssignToLoopback,                  config_parse_bool,                         0,                             offsetof(Tunnel, assign_to_loopback)
+Tunnel.AllowLocalRemote,                  config_parse_tristate,                     0,                             offsetof(Tunnel, allow_localremote)
+Tunnel.FooOverUDP,                        config_parse_bool,                         0,                             offsetof(Tunnel, fou_tunnel)
+Tunnel.FOUDestinationPort,                config_parse_ip_port,                      0,                             offsetof(Tunnel, fou_destination_port)
+Tunnel.FOUSourcePort,                     config_parse_ip_port,                      0,                             offsetof(Tunnel, encap_src_port)
+Tunnel.Encapsulation,                     config_parse_fou_encap_type,               0,                             offsetof(Tunnel, fou_encap_type)
+Tunnel.IPv6RapidDeploymentPrefix,         config_parse_6rd_prefix,                   0,                             0
+Tunnel.ERSPANVersion,                     config_parse_erspan_version,               0,                             offsetof(Tunnel, erspan_version)
+Tunnel.ERSPANIndex,                       config_parse_erspan_index,                 0,                             offsetof(Tunnel, erspan_index)
+Tunnel.ERSPANDirection,                   config_parse_erspan_direction,             0,                             offsetof(Tunnel, erspan_direction)
+Tunnel.ERSPANHardwareId,                  config_parse_erspan_hwid,                  0,                             offsetof(Tunnel, erspan_hwid)
+Tunnel.SerializeTunneledPackets,          config_parse_tristate,                     0,                             offsetof(Tunnel, gre_erspan_sequence)
+Tunnel.ISATAP,                            config_parse_tristate,                     0,                             offsetof(Tunnel, isatap)
+Tunnel.External,                          config_parse_bool,                         0,                             offsetof(Tunnel, external)
+FooOverUDP.Protocol,                      config_parse_ip_protocol,                  0,                             offsetof(FouTunnel, fou_protocol)
+FooOverUDP.Encapsulation,                 config_parse_fou_encap_type,               0,                             offsetof(FouTunnel, fou_encap_type)
+FooOverUDP.Port,                          config_parse_ip_port,                      0,                             offsetof(FouTunnel, port)
+FooOverUDP.PeerPort,                      config_parse_ip_port,                      0,                             offsetof(FouTunnel, peer_port)
+FooOverUDP.Local,                         config_parse_fou_tunnel_address,           0,                             offsetof(FouTunnel, local)
+FooOverUDP.Peer,                          config_parse_fou_tunnel_address,           0,                             offsetof(FouTunnel, peer)
+L2TP.TunnelId,                            config_parse_l2tp_tunnel_id,               0,                             offsetof(L2tpTunnel, tunnel_id)
+L2TP.PeerTunnelId,                        config_parse_l2tp_tunnel_id,               0,                             offsetof(L2tpTunnel, peer_tunnel_id)
+L2TP.UDPSourcePort,                       config_parse_ip_port,                      0,                             offsetof(L2tpTunnel, l2tp_udp_sport)
+L2TP.UDPDestinationPort,                  config_parse_ip_port,                      0,                             offsetof(L2tpTunnel, l2tp_udp_dport)
+L2TP.Local,                               config_parse_l2tp_tunnel_local_address,    0,                             0
+L2TP.Remote,                              config_parse_l2tp_tunnel_remote_address,   0,                             0
+L2TP.EncapsulationType,                   config_parse_l2tp_encap_type,              0,                             offsetof(L2tpTunnel, l2tp_encap_type)
+L2TP.UDPCheckSum,                         config_parse_bool,                         0,                             offsetof(L2tpTunnel, udp_csum)
+L2TP.UDP6CheckSumRx,                      config_parse_bool,                         0,                             offsetof(L2tpTunnel, udp6_csum_rx)
+L2TP.UDP6CheckSumTx,                      config_parse_bool,                         0,                             offsetof(L2tpTunnel, udp6_csum_tx)
+L2TPSession.SessionId,                    config_parse_l2tp_session_id,              0,                             0
+L2TPSession.PeerSessionId,                config_parse_l2tp_session_id,              0,                             0
+L2TPSession.Layer2SpecificHeader,         config_parse_l2tp_session_l2spec,          0,                             0
+L2TPSession.Name,                         config_parse_l2tp_session_name,            0,                             0
+Peer.Name,                                config_parse_ifname,                       0,                             offsetof(Veth, ifname_peer)
+Peer.MACAddress,                          config_parse_netdev_hw_addr,               ETH_ALEN,                      offsetof(Veth, hw_addr_peer)
+VXCAN.Peer,                               config_parse_ifname,                       0,                             offsetof(VxCan, ifname_peer)
+VXLAN.VNI,                                config_parse_uint32,                       0,                             offsetof(VxLan, vni)
+VXLAN.Id,                                 config_parse_uint32,                       0,                             offsetof(VxLan, vni) /* deprecated */
+VXLAN.Group,                              config_parse_vxlan_address,                0,                             offsetof(VxLan, group)
+VXLAN.Local,                              config_parse_vxlan_address,                0,                             offsetof(VxLan, local)
+VXLAN.Remote,                             config_parse_vxlan_address,                0,                             offsetof(VxLan, remote)
+VXLAN.TOS,                                config_parse_unsigned,                     0,                             offsetof(VxLan, tos)
+VXLAN.TTL,                                config_parse_vxlan_ttl,                    0,                             offsetof(VxLan, ttl)
+VXLAN.MacLearning,                        config_parse_bool,                         0,                             offsetof(VxLan, learning)
+VXLAN.ARPProxy,                           config_parse_bool,                         0,                             offsetof(VxLan, arp_proxy)
+VXLAN.ReduceARPProxy,                     config_parse_bool,                         0,                             offsetof(VxLan, arp_proxy)
+VXLAN.L2MissNotification,                 config_parse_bool,                         0,                             offsetof(VxLan, l2miss)
+VXLAN.L3MissNotification,                 config_parse_bool,                         0,                             offsetof(VxLan, l3miss)
+VXLAN.RouteShortCircuit,                  config_parse_bool,                         0,                             offsetof(VxLan, route_short_circuit)
+VXLAN.UDPCheckSum,                        config_parse_bool,                         0,                             offsetof(VxLan, udpcsum)
+VXLAN.UDPChecksum,                        config_parse_bool,                         0,                             offsetof(VxLan, udpcsum)
+VXLAN.UDP6ZeroCheckSumRx,                 config_parse_bool,                         0,                             offsetof(VxLan, udp6zerocsumrx)
+VXLAN.UDP6ZeroChecksumRx,                 config_parse_bool,                         0,                             offsetof(VxLan, udp6zerocsumrx)
+VXLAN.UDP6ZeroCheckSumTx,                 config_parse_bool,                         0,                             offsetof(VxLan, udp6zerocsumtx)
+VXLAN.UDP6ZeroChecksumTx,                 config_parse_bool,                         0,                             offsetof(VxLan, udp6zerocsumtx)
+VXLAN.RemoteChecksumTx,                   config_parse_bool,                         0,                             offsetof(VxLan, remote_csum_tx)
+VXLAN.RemoteChecksumRx,                   config_parse_bool,                         0,                             offsetof(VxLan, remote_csum_rx)
+VXLAN.FDBAgeingSec,                       config_parse_sec,                          0,                             offsetof(VxLan, fdb_ageing)
+VXLAN.GroupPolicyExtension,               config_parse_bool,                         0,                             offsetof(VxLan, group_policy)
+VXLAN.GenericProtocolExtension,           config_parse_bool,                         0,                             offsetof(VxLan, generic_protocol_extension)
+VXLAN.MaximumFDBEntries,                  config_parse_unsigned,                     0,                             offsetof(VxLan, max_fdb)
+VXLAN.PortRange,                          config_parse_port_range,                   0,                             0
+VXLAN.DestinationPort,                    config_parse_ip_port,                      0,                             offsetof(VxLan, dest_port)
+VXLAN.FlowLabel,                          config_parse_flow_label,                   0,                             0
+VXLAN.IPDoNotFragment,                    config_parse_df,                           0,                             offsetof(VxLan, df)
+VXLAN.Independent,                        config_parse_bool,                         0,                             offsetof(VxLan, independent)
+GENEVE.Id,                                config_parse_geneve_vni,                   0,                             offsetof(Geneve, id)
+GENEVE.Remote,                            config_parse_geneve_address,               0,                             offsetof(Geneve, remote)
+GENEVE.TOS,                               config_parse_uint8,                        0,                             offsetof(Geneve, tos)
+GENEVE.TTL,                               config_parse_geneve_ttl,                   0,                             offsetof(Geneve, ttl)
+GENEVE.UDPChecksum,                       config_parse_bool,                         0,                             offsetof(Geneve, udpcsum)
+GENEVE.UDP6ZeroCheckSumRx,                config_parse_bool,                         0,                             offsetof(Geneve, udp6zerocsumrx)
+GENEVE.UDP6ZeroChecksumRx,                config_parse_bool,                         0,                             offsetof(Geneve, udp6zerocsumrx)
+GENEVE.UDP6ZeroCheckSumTx,                config_parse_bool,                         0,                             offsetof(Geneve, udp6zerocsumtx)
+GENEVE.UDP6ZeroChecksumTx,                config_parse_bool,                         0,                             offsetof(Geneve, udp6zerocsumtx)
+GENEVE.DestinationPort,                   config_parse_ip_port,                      0,                             offsetof(Geneve, dest_port)
+GENEVE.IPDoNotFragment,                   config_parse_geneve_df,                    0,                             offsetof(Geneve, geneve_df)
+GENEVE.FlowLabel,                         config_parse_geneve_flow_label,            0,                             0
+MACsec.Port,                              config_parse_macsec_port,                  0,                             0
+MACsec.Encrypt,                           config_parse_tristate,                     0,                             offsetof(MACsec, encrypt)
+MACsecReceiveChannel.Port,                config_parse_macsec_port,                  0,                             0
+MACsecReceiveChannel.MACAddress,          config_parse_macsec_hw_address,            0,                             0
+MACsecTransmitAssociation.PacketNumber,   config_parse_macsec_packet_number,         0,                             0
+MACsecTransmitAssociation.KeyId,          config_parse_macsec_key_id,                0,                             0
+MACsecTransmitAssociation.Key,            config_parse_macsec_key,                   0,                             0
+MACsecTransmitAssociation.KeyFile,        config_parse_macsec_key_file,              0,                             0
+MACsecTransmitAssociation.Activate,       config_parse_macsec_sa_activate,           0,                             0
+MACsecTransmitAssociation.UseForEncoding, config_parse_macsec_use_for_encoding,      0,                             0
+MACsecReceiveAssociation.Port,            config_parse_macsec_port,                  0,                             0
+MACsecReceiveAssociation.MACAddress,      config_parse_macsec_hw_address,            0,                             0
+MACsecReceiveAssociation.PacketNumber,    config_parse_macsec_packet_number,         0,                             0
+MACsecReceiveAssociation.KeyId,           config_parse_macsec_key_id,                0,                             0
+MACsecReceiveAssociation.Key,             config_parse_macsec_key,                   0,                             0
+MACsecReceiveAssociation.KeyFile,         config_parse_macsec_key_file,              0,                             0
+MACsecReceiveAssociation.Activate,        config_parse_macsec_sa_activate,           0,                             0
+Tun.OneQueue,                             config_parse_warn_compat,                  DISABLED_LEGACY,               0
+Tun.MultiQueue,                           config_parse_bool,                         0,                             offsetof(TunTap, multi_queue)
+Tun.PacketInfo,                           config_parse_bool,                         0,                             offsetof(TunTap, packet_info)
+Tun.VNetHeader,                           config_parse_bool,                         0,                             offsetof(TunTap, vnet_hdr)
+Tun.User,                                 config_parse_string,                       CONFIG_PARSE_STRING_SAFE,      offsetof(TunTap, user_name)
+Tun.Group,                                config_parse_string,                       CONFIG_PARSE_STRING_SAFE,      offsetof(TunTap, group_name)
+Tun.KeepCarrier,                          config_parse_bool,                         0,                             offsetof(TunTap, keep_fd)
+Tap.OneQueue,                             config_parse_warn_compat,                  DISABLED_LEGACY,               0
+Tap.MultiQueue,                           config_parse_bool,                         0,                             offsetof(TunTap, multi_queue)
+Tap.PacketInfo,                           config_parse_bool,                         0,                             offsetof(TunTap, packet_info)
+Tap.VNetHeader,                           config_parse_bool,                         0,                             offsetof(TunTap, vnet_hdr)
+Tap.User,                                 config_parse_string,                       CONFIG_PARSE_STRING_SAFE,      offsetof(TunTap, user_name)
+Tap.Group,                                config_parse_string,                       CONFIG_PARSE_STRING_SAFE,      offsetof(TunTap, group_name)
+Tap.KeepCarrier,                          config_parse_bool,                         0,                             offsetof(TunTap, keep_fd)
+Bond.Mode,                                config_parse_bond_mode,                    0,                             offsetof(Bond, mode)
+Bond.TransmitHashPolicy,                  config_parse_bond_xmit_hash_policy,        0,                             offsetof(Bond, xmit_hash_policy)
+Bond.LACPTransmitRate,                    config_parse_bond_lacp_rate,               0,                             offsetof(Bond, lacp_rate)
+Bond.AdSelect,                            config_parse_bond_ad_select,               0,                             offsetof(Bond, ad_select)
+Bond.FailOverMACPolicy,                   config_parse_bond_fail_over_mac,           0,                             offsetof(Bond, fail_over_mac)
+Bond.ARPIPTargets,                        config_parse_arp_ip_target_address,        0,                             0
+Bond.ARPValidate,                         config_parse_bond_arp_validate,            0,                             offsetof(Bond, arp_validate)
+Bond.ARPAllTargets,                       config_parse_bond_arp_all_targets,         0,                             offsetof(Bond, arp_all_targets)
+Bond.PrimaryReselectPolicy,               config_parse_bond_primary_reselect,        0,                             offsetof(Bond, primary_reselect)
+Bond.ResendIGMP,                          config_parse_unsigned,                     0,                             offsetof(Bond, resend_igmp)
+Bond.PacketsPerSlave,                     config_parse_unsigned,                     0,                             offsetof(Bond, packets_per_slave)
+Bond.GratuitousARP,                       config_parse_unsigned,                     0,                             offsetof(Bond, num_grat_arp)
+Bond.AllSlavesActive,                     config_parse_bool,                         0,                             offsetof(Bond, all_slaves_active)
+Bond.DynamicTransmitLoadBalancing,        config_parse_tristate,                     0,                             offsetof(Bond, tlb_dynamic_lb)
+Bond.MinLinks,                            config_parse_unsigned,                     0,                             offsetof(Bond, min_links)
+Bond.MIIMonitorSec,                       config_parse_sec,                          0,                             offsetof(Bond, miimon)
+Bond.UpDelaySec,                          config_parse_sec,                          0,                             offsetof(Bond, updelay)
+Bond.DownDelaySec,                        config_parse_sec,                          0,                             offsetof(Bond, downdelay)
+Bond.ARPIntervalSec,                      config_parse_sec,                          0,                             offsetof(Bond, arp_interval)
+Bond.LearnPacketIntervalSec,              config_parse_sec,                          0,                             offsetof(Bond, lp_interval)
+Bond.AdActorSystemPriority,               config_parse_ad_actor_sys_prio,            0,                             offsetof(Bond, ad_actor_sys_prio)
+Bond.AdUserPortKey,                       config_parse_ad_user_port_key,             0,                             offsetof(Bond, ad_user_port_key)
+Bond.AdActorSystem,                       config_parse_ad_actor_system,              0,                             offsetof(Bond, ad_actor_system)
+Bridge.HelloTimeSec,                      config_parse_sec,                          0,                             offsetof(Bridge, hello_time)
+Bridge.MaxAgeSec,                         config_parse_sec,                          0,                             offsetof(Bridge, max_age)
+Bridge.AgeingTimeSec,                     config_parse_sec,                          0,                             offsetof(Bridge, ageing_time)
+Bridge.ForwardDelaySec,                   config_parse_sec,                          0,                             offsetof(Bridge, forward_delay)
+Bridge.Priority,                          config_parse_uint16,                       0,                             offsetof(Bridge, priority)
+Bridge.GroupForwardMask,                  config_parse_uint16,                       0,                             offsetof(Bridge, group_fwd_mask)
+Bridge.DefaultPVID,                       config_parse_default_port_vlanid,          0,                             offsetof(Bridge, default_pvid)
+Bridge.MulticastQuerier,                  config_parse_tristate,                     0,                             offsetof(Bridge, mcast_querier)
+Bridge.MulticastSnooping,                 config_parse_tristate,                     0,                             offsetof(Bridge, mcast_snooping)
+Bridge.VLANFiltering,                     config_parse_tristate,                     0,                             offsetof(Bridge, vlan_filtering)
+Bridge.VLANProtocol,                      config_parse_vlanprotocol,                 0,                             offsetof(Bridge, vlan_protocol)
+Bridge.STP,                               config_parse_tristate,                     0,                             offsetof(Bridge, stp)
+Bridge.MulticastIGMPVersion,              config_parse_uint8,                        0,                             offsetof(Bridge, igmp_version)
+VRF.TableId,                              config_parse_uint32,                       0,                             offsetof(Vrf, table) /* deprecated */
+VRF.Table,                                config_parse_uint32,                       0,                             offsetof(Vrf, table)
+BareUDP.DestinationPort,                  config_parse_ip_port,                      0,                             offsetof(BareUDP, dest_port)
+BareUDP.EtherType,                        config_parse_bare_udp_iftype,              0,                             offsetof(BareUDP, iftype)
+WireGuard.FirewallMark,                   config_parse_unsigned,                     0,                             offsetof(Wireguard, fwmark)
+WireGuard.FwMark,                         config_parse_unsigned,                     0,                             offsetof(Wireguard, fwmark) /* deprecated */
+WireGuard.ListenPort,                     config_parse_wireguard_listen_port,        0,                             offsetof(Wireguard, port)
+WireGuard.PrivateKey,                     config_parse_wireguard_private_key,        0,                             0
+WireGuard.PrivateKeyFile,                 config_parse_wireguard_private_key_file,   0,                             0
+WireGuard.RouteTable,                     config_parse_wireguard_route_table,        0,                             offsetof(Wireguard, route_table)
+WireGuard.RouteMetric,                    config_parse_wireguard_route_priority,     0,                             offsetof(Wireguard, route_priority)
+WireGuardPeer.AllowedIPs,                 config_parse_wireguard_allowed_ips,        0,                             0
+WireGuardPeer.Endpoint,                   config_parse_wireguard_endpoint,           0,                             0
+WireGuardPeer.PublicKey,                  config_parse_wireguard_peer_key,           0,                             0
+WireGuardPeer.PresharedKey,               config_parse_wireguard_peer_key,           0,                             0
+WireGuardPeer.PresharedKeyFile,           config_parse_wireguard_preshared_key_file, 0,                             0
+WireGuardPeer.PersistentKeepalive,        config_parse_wireguard_keepalive,          0,                             0
+WireGuardPeer.RouteTable,                 config_parse_wireguard_peer_route_table,   0,                             0
+WireGuardPeer.RouteMetric,                config_parse_wireguard_peer_route_priority,0,                             0
+Xfrm.InterfaceId,                         config_parse_uint32,                       0,                             offsetof(Xfrm, if_id)
+Xfrm.Independent,                         config_parse_bool,                         0,                             offsetof(Xfrm, independent)
+BatmanAdvanced.Aggregation,               config_parse_bool,                         0,                             offsetof(BatmanAdvanced, aggregation)
+BatmanAdvanced.BridgeLoopAvoidance,       config_parse_bool,                         0,                             offsetof(BatmanAdvanced, bridge_loop_avoidance)
+BatmanAdvanced.DistributedArpTable,       config_parse_bool,                         0,                             offsetof(BatmanAdvanced, distributed_arp_table)
+BatmanAdvanced.Fragmentation,             config_parse_bool,                         0,                             offsetof(BatmanAdvanced, fragmentation)
+BatmanAdvanced.GatewayMode,               config_parse_batadv_gateway_mode,          0,                             offsetof(BatmanAdvanced, gateway_mode)
+BatmanAdvanced.GatewayBandwithDown,       config_parse_badadv_bandwidth,             0,                             offsetof(BatmanAdvanced, gateway_bandwidth_down)
+BatmanAdvanced.GatewayBandwithUp,         config_parse_badadv_bandwidth,             0,                             offsetof(BatmanAdvanced, gateway_bandwidth_up)
+BatmanAdvanced.GatewayBandwidthDown,      config_parse_badadv_bandwidth,             0,                             offsetof(BatmanAdvanced, gateway_bandwidth_down)
+BatmanAdvanced.GatewayBandwidthUp,        config_parse_badadv_bandwidth,             0,                             offsetof(BatmanAdvanced, gateway_bandwidth_up)
+BatmanAdvanced.HopPenalty,                config_parse_uint8,                        0,                             offsetof(BatmanAdvanced, hop_penalty)
+BatmanAdvanced.OriginatorIntervalSec,     config_parse_sec,                          0,                             offsetof(BatmanAdvanced, originator_interval)
+BatmanAdvanced.RoutingAlgorithm,          config_parse_batadv_routing_algorithm,     0,                             offsetof(BatmanAdvanced, routing_algorithm)
+IPoIB.PartitionKey,                       config_parse_ipoib_pkey,                   0,                             offsetof(IPoIB, pkey)
+IPoIB.Mode,                               config_parse_ipoib_mode,                   0,                             offsetof(IPoIB, mode)
+IPoIB.IgnoreUserspaceMulticastGroups,     config_parse_tristate,                     0,                             offsetof(IPoIB, umcast)
+WLAN.PhysicalDevice,                      config_parse_wiphy,                        0,                             0
+WLAN.Type,                                config_parse_wlan_iftype,                  0,                             offsetof(WLan, iftype)
+WLAN.WDS,                                 config_parse_tristate,                     0,                             offsetof(WLan, wds)
diff --git a/src/network/netdev/netdev-util.c b/src/network/netdev/netdev-util.c
new file mode 100644
index 0000000..2350624
--- /dev/null
+++ b/src/network/netdev/netdev-util.c
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "netdev-util.h"
+#include "networkd-address.h"
+#include "networkd-link.h"
+#include "string-table.h"
+
+static const char * const netdev_local_address_type_table[_NETDEV_LOCAL_ADDRESS_TYPE_MAX] = {
+        [NETDEV_LOCAL_ADDRESS_IPV4LL]  = "ipv4_link_local",
+        [NETDEV_LOCAL_ADDRESS_IPV6LL]  = "ipv6_link_local",
+        [NETDEV_LOCAL_ADDRESS_DHCP4]   = "dhcp4",
+        [NETDEV_LOCAL_ADDRESS_DHCP6]   = "dhcp6",
+        [NETDEV_LOCAL_ADDRESS_SLAAC]   = "slaac",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(netdev_local_address_type, NetDevLocalAddressType);
+
+int link_get_local_address(
+                Link *link,
+                NetDevLocalAddressType type,
+                int family,
+                int *ret_family,
+                union in_addr_union *ret_address) {
+
+        Address *a;
+
+        assert(link);
+
+        switch (type) {
+        case NETDEV_LOCAL_ADDRESS_IPV4LL:
+                assert(IN_SET(family, AF_UNSPEC, AF_INET));
+                family = AF_INET;
+                break;
+        case NETDEV_LOCAL_ADDRESS_IPV6LL:
+                assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+                family = AF_INET6;
+                break;
+        case NETDEV_LOCAL_ADDRESS_DHCP4:
+                assert(IN_SET(family, AF_UNSPEC, AF_INET));
+                family = AF_INET;
+                break;
+        case NETDEV_LOCAL_ADDRESS_DHCP6:
+                assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+                family = AF_INET6;
+                break;
+        case NETDEV_LOCAL_ADDRESS_SLAAC:
+                assert(IN_SET(family, AF_UNSPEC, AF_INET6));
+                family = AF_INET6;
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false))
+                return -EBUSY;
+
+        SET_FOREACH(a, link->addresses) {
+                if (!address_is_ready(a))
+                        continue;
+
+                if (a->family != family)
+                        continue;
+
+                if (in_addr_is_set(a->family, &a->in_addr_peer))
+                        continue;
+
+                switch (type) {
+                case NETDEV_LOCAL_ADDRESS_IPV4LL:
+                        if (a->source != NETWORK_CONFIG_SOURCE_IPV4LL)
+                                continue;
+                        break;
+                case NETDEV_LOCAL_ADDRESS_IPV6LL:
+                        if (!in6_addr_is_link_local(&a->in_addr.in6))
+                                continue;
+                        break;
+                case NETDEV_LOCAL_ADDRESS_DHCP4:
+                        if (a->source != NETWORK_CONFIG_SOURCE_DHCP4)
+                                continue;
+                        break;
+                case NETDEV_LOCAL_ADDRESS_DHCP6:
+                        if (a->source != NETWORK_CONFIG_SOURCE_DHCP6)
+                                continue;
+                        break;
+                case NETDEV_LOCAL_ADDRESS_SLAAC:
+                        if (a->source != NETWORK_CONFIG_SOURCE_NDISC)
+                                continue;
+                        break;
+                default:
+                        assert_not_reached();
+                }
+
+                if (ret_family)
+                        *ret_family = a->family;
+                if (ret_address)
+                        *ret_address = a->in_addr;
+                return 1;
+        }
+
+        return -ENXIO;
+}
diff --git a/src/network/netdev/netdev-util.h b/src/network/netdev/netdev-util.h
new file mode 100644
index 0000000..02b07e3
--- /dev/null
+++ b/src/network/netdev/netdev-util.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "in-addr-util.h"
+#include "macro.h"
+
+typedef struct Link Link;
+
+typedef enum NetDevLocalAddressType {
+        NETDEV_LOCAL_ADDRESS_IPV4LL,
+        NETDEV_LOCAL_ADDRESS_IPV6LL,
+        NETDEV_LOCAL_ADDRESS_DHCP4,
+        NETDEV_LOCAL_ADDRESS_DHCP6,
+        NETDEV_LOCAL_ADDRESS_SLAAC,
+        _NETDEV_LOCAL_ADDRESS_TYPE_MAX,
+        _NETDEV_LOCAL_ADDRESS_TYPE_INVALID = -EINVAL,
+} NetDevLocalAddressType;
+
+const char *netdev_local_address_type_to_string(NetDevLocalAddressType t) _const_;
+NetDevLocalAddressType netdev_local_address_type_from_string(const char *s) _pure_;
+
+int link_get_local_address(
+                Link *link,
+                NetDevLocalAddressType type,
+                int family,
+                int *ret_family,
+                union in_addr_union *ret_address);
diff --git a/src/network/netdev/netdev.c b/src/network/netdev/netdev.c
new file mode 100644
index 0000000..038a27c
--- /dev/null
+++ b/src/network/netdev/netdev.c
@@ -0,0 +1,950 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "arphrd-util.h"
+#include "bareudp.h"
+#include "batadv.h"
+#include "bond.h"
+#include "bridge.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "dummy.h"
+#include "fd-util.h"
+#include "fou-tunnel.h"
+#include "geneve.h"
+#include "ifb.h"
+#include "ipoib.h"
+#include "ipvlan.h"
+#include "l2tp-tunnel.h"
+#include "list.h"
+#include "macsec.h"
+#include "macvlan.h"
+#include "netdev.h"
+#include "netdevsim.h"
+#include "netif-util.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "networkd-queue.h"
+#include "networkd-setlink.h"
+#include "networkd-sriov.h"
+#include "nlmon.h"
+#include "path-lookup.h"
+#include "siphash24.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tunnel.h"
+#include "tuntap.h"
+#include "vcan.h"
+#include "veth.h"
+#include "vlan.h"
+#include "vrf.h"
+#include "vxcan.h"
+#include "vxlan.h"
+#include "wireguard.h"
+#include "wlan.h"
+#include "xfrm.h"
+
+const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
+        [NETDEV_KIND_BAREUDP]   = &bare_udp_vtable,
+        [NETDEV_KIND_BATADV]    = &batadv_vtable,
+        [NETDEV_KIND_BOND]      = &bond_vtable,
+        [NETDEV_KIND_BRIDGE]    = &bridge_vtable,
+        [NETDEV_KIND_DUMMY]     = &dummy_vtable,
+        [NETDEV_KIND_ERSPAN]    = &erspan_vtable,
+        [NETDEV_KIND_FOU]       = &foutnl_vtable,
+        [NETDEV_KIND_GENEVE]    = &geneve_vtable,
+        [NETDEV_KIND_GRE]       = &gre_vtable,
+        [NETDEV_KIND_GRETAP]    = &gretap_vtable,
+        [NETDEV_KIND_IFB]       = &ifb_vtable,
+        [NETDEV_KIND_IP6GRE]    = &ip6gre_vtable,
+        [NETDEV_KIND_IP6GRETAP] = &ip6gretap_vtable,
+        [NETDEV_KIND_IP6TNL]    = &ip6tnl_vtable,
+        [NETDEV_KIND_IPIP]      = &ipip_vtable,
+        [NETDEV_KIND_IPOIB]     = &ipoib_vtable,
+        [NETDEV_KIND_IPVLAN]    = &ipvlan_vtable,
+        [NETDEV_KIND_IPVTAP]    = &ipvtap_vtable,
+        [NETDEV_KIND_L2TP]      = &l2tptnl_vtable,
+        [NETDEV_KIND_MACSEC]    = &macsec_vtable,
+        [NETDEV_KIND_MACVLAN]   = &macvlan_vtable,
+        [NETDEV_KIND_MACVTAP]   = &macvtap_vtable,
+        [NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable,
+        [NETDEV_KIND_NLMON]     = &nlmon_vtable,
+        [NETDEV_KIND_SIT]       = &sit_vtable,
+        [NETDEV_KIND_TAP]       = &tap_vtable,
+        [NETDEV_KIND_TUN]       = &tun_vtable,
+        [NETDEV_KIND_VCAN]      = &vcan_vtable,
+        [NETDEV_KIND_VETH]      = &veth_vtable,
+        [NETDEV_KIND_VLAN]      = &vlan_vtable,
+        [NETDEV_KIND_VRF]       = &vrf_vtable,
+        [NETDEV_KIND_VTI6]      = &vti6_vtable,
+        [NETDEV_KIND_VTI]       = &vti_vtable,
+        [NETDEV_KIND_VXCAN]     = &vxcan_vtable,
+        [NETDEV_KIND_VXLAN]     = &vxlan_vtable,
+        [NETDEV_KIND_WIREGUARD] = &wireguard_vtable,
+        [NETDEV_KIND_WLAN]      = &wlan_vtable,
+        [NETDEV_KIND_XFRM]      = &xfrm_vtable,
+};
+
+static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
+        [NETDEV_KIND_BAREUDP]   = "bareudp",
+        [NETDEV_KIND_BATADV]    = "batadv",
+        [NETDEV_KIND_BOND]      = "bond",
+        [NETDEV_KIND_BRIDGE]    = "bridge",
+        [NETDEV_KIND_DUMMY]     = "dummy",
+        [NETDEV_KIND_ERSPAN]    = "erspan",
+        [NETDEV_KIND_FOU]       = "fou",
+        [NETDEV_KIND_GENEVE]    = "geneve",
+        [NETDEV_KIND_GRE]       = "gre",
+        [NETDEV_KIND_GRETAP]    = "gretap",
+        [NETDEV_KIND_IFB]       = "ifb",
+        [NETDEV_KIND_IP6GRE]    = "ip6gre",
+        [NETDEV_KIND_IP6GRETAP] = "ip6gretap",
+        [NETDEV_KIND_IP6TNL]    = "ip6tnl",
+        [NETDEV_KIND_IPIP]      = "ipip",
+        [NETDEV_KIND_IPOIB]     = "ipoib",
+        [NETDEV_KIND_IPVLAN]    = "ipvlan",
+        [NETDEV_KIND_IPVTAP]    = "ipvtap",
+        [NETDEV_KIND_L2TP]      = "l2tp",
+        [NETDEV_KIND_MACSEC]    = "macsec",
+        [NETDEV_KIND_MACVLAN]   = "macvlan",
+        [NETDEV_KIND_MACVTAP]   = "macvtap",
+        [NETDEV_KIND_NETDEVSIM] = "netdevsim",
+        [NETDEV_KIND_NLMON]     = "nlmon",
+        [NETDEV_KIND_SIT]       = "sit",
+        [NETDEV_KIND_TAP]       = "tap",
+        [NETDEV_KIND_TUN]       = "tun",
+        [NETDEV_KIND_VCAN]      = "vcan",
+        [NETDEV_KIND_VETH]      = "veth",
+        [NETDEV_KIND_VLAN]      = "vlan",
+        [NETDEV_KIND_VRF]       = "vrf",
+        [NETDEV_KIND_VTI6]      = "vti6",
+        [NETDEV_KIND_VTI]       = "vti",
+        [NETDEV_KIND_VXCAN]     = "vxcan",
+        [NETDEV_KIND_VXLAN]     = "vxlan",
+        [NETDEV_KIND_WIREGUARD] = "wireguard",
+        [NETDEV_KIND_WLAN]      = "wlan",
+        [NETDEV_KIND_XFRM]      = "xfrm",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
+
+bool netdev_is_managed(NetDev *netdev) {
+        if (!netdev || !netdev->manager || !netdev->ifname)
+                return false;
+
+        return hashmap_get(netdev->manager->netdevs, netdev->ifname) == netdev;
+}
+
+static bool netdev_is_stacked_and_independent(NetDev *netdev) {
+        assert(netdev);
+
+        if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
+                return false;
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_ERSPAN:
+                return ERSPAN(netdev)->independent;
+        case NETDEV_KIND_GRE:
+                return GRE(netdev)->independent;
+        case NETDEV_KIND_GRETAP:
+                return GRETAP(netdev)->independent;
+        case NETDEV_KIND_IP6GRE:
+                return IP6GRE(netdev)->independent;
+        case NETDEV_KIND_IP6GRETAP:
+                return IP6GRETAP(netdev)->independent;
+        case NETDEV_KIND_IP6TNL:
+                return IP6TNL(netdev)->independent;
+        case NETDEV_KIND_IPIP:
+                return IPIP(netdev)->independent;
+        case NETDEV_KIND_SIT:
+                return SIT(netdev)->independent;
+        case NETDEV_KIND_VTI:
+                return VTI(netdev)->independent;
+        case NETDEV_KIND_VTI6:
+                return VTI6(netdev)->independent;
+        case NETDEV_KIND_VXLAN:
+                return VXLAN(netdev)->independent;
+        case NETDEV_KIND_XFRM:
+                return XFRM(netdev)->independent;
+        default:
+                return false;
+        }
+}
+
+static bool netdev_is_stacked(NetDev *netdev) {
+        assert(netdev);
+
+        if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
+                return false;
+
+        if (netdev_is_stacked_and_independent(netdev))
+                return false;
+
+        return true;
+}
+
+static void netdev_detach_from_manager(NetDev *netdev) {
+        if (netdev->ifname && netdev->manager)
+                hashmap_remove(netdev->manager->netdevs, netdev->ifname);
+}
+
+static NetDev *netdev_free(NetDev *netdev) {
+        assert(netdev);
+
+        netdev_detach_from_manager(netdev);
+
+        free(netdev->filename);
+
+        free(netdev->description);
+        free(netdev->ifname);
+        condition_free_list(netdev->conditions);
+
+        /* Invoke the per-kind done() destructor, but only if the state field is initialized. We conditionalize that
+         * because we parse .netdev files twice: once to determine the kind (with a short, minimal NetDev structure
+         * allocation, with no room for per-kind fields), and once to read the kind's properties (with a full,
+         * comprehensive NetDev structure allocation with enough space for whatever the specific kind needs). Now, in
+         * the first case we shouldn't try to destruct the per-kind NetDev fields on destruction, in the second case we
+         * should. We use the state field to discern the two cases: it's _NETDEV_STATE_INVALID on the first "raw"
+         * call. */
+        if (netdev->state != _NETDEV_STATE_INVALID &&
+            NETDEV_VTABLE(netdev) &&
+            NETDEV_VTABLE(netdev)->done)
+                NETDEV_VTABLE(netdev)->done(netdev);
+
+        return mfree(netdev);
+}
+
+DEFINE_TRIVIAL_REF_UNREF_FUNC(NetDev, netdev, netdev_free);
+
+void netdev_drop(NetDev *netdev) {
+        if (!netdev)
+                return;
+
+        if (netdev_is_stacked(netdev)) {
+                /* The netdev may be removed due to the underlying device removal, and the device may
+                 * be re-added later. */
+                netdev->state = NETDEV_STATE_LOADING;
+                netdev->ifindex = 0;
+
+                log_netdev_debug(netdev, "netdev removed");
+                return;
+        }
+
+        if (NETDEV_VTABLE(netdev) && NETDEV_VTABLE(netdev)->drop)
+                NETDEV_VTABLE(netdev)->drop(netdev);
+
+        netdev->state = NETDEV_STATE_LINGER;
+
+        log_netdev_debug(netdev, "netdev removed");
+
+        netdev_detach_from_manager(netdev);
+        netdev_unref(netdev);
+        return;
+}
+
+int netdev_get(Manager *manager, const char *name, NetDev **ret) {
+        NetDev *netdev;
+
+        assert(manager);
+        assert(name);
+        assert(ret);
+
+        netdev = hashmap_get(manager->netdevs, name);
+        if (!netdev)
+                return -ENOENT;
+
+        *ret = netdev;
+
+        return 0;
+}
+
+void netdev_enter_failed(NetDev *netdev) {
+        netdev->state = NETDEV_STATE_FAILED;
+}
+
+static int netdev_enter_ready(NetDev *netdev) {
+        assert(netdev);
+        assert(netdev->ifname);
+
+        if (netdev->state != NETDEV_STATE_CREATING)
+                return 0;
+
+        netdev->state = NETDEV_STATE_READY;
+
+        log_netdev_info(netdev, "netdev ready");
+
+        if (NETDEV_VTABLE(netdev)->post_create)
+                NETDEV_VTABLE(netdev)->post_create(netdev, NULL);
+
+        return 0;
+}
+
+/* callback for netdev's created without a backing Link */
+static int netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r == -EEXIST)
+                log_netdev_info(netdev, "netdev exists, using existing without changing its parameters");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "netdev could not be created: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "Created");
+
+        return 1;
+}
+
+int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *message) {
+        uint16_t type;
+        const char *kind;
+        const char *received_kind;
+        const char *received_name;
+        int r, ifindex;
+
+        assert(netdev);
+        assert(message);
+
+        r = sd_netlink_message_get_type(message, &type);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get rtnl message type: %m");
+
+        if (type != RTM_NEWLINK)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL), "Cannot set ifindex from unexpected rtnl message type.");
+
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_netdev_error_errno(netdev, r, "Could not get ifindex: %m");
+                netdev_enter_failed(netdev);
+                return r;
+        } else if (ifindex <= 0) {
+                log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex);
+                netdev_enter_failed(netdev);
+                return -EINVAL;
+        }
+
+        if (netdev->ifindex > 0) {
+                if (netdev->ifindex != ifindex) {
+                        log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d",
+                                         ifindex, netdev->ifindex);
+                        netdev_enter_failed(netdev);
+                        return -EEXIST;
+                } else
+                        /* ifindex already set to the same for this netdev */
+                        return 0;
+        }
+
+        r = sd_netlink_message_read_string(message, IFLA_IFNAME, &received_name);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not get IFNAME: %m");
+
+        if (!streq(netdev->ifname, received_name)) {
+                log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", received_name);
+                netdev_enter_failed(netdev);
+                return -EINVAL;
+        }
+
+        if (!NETDEV_VTABLE(netdev)->skip_netdev_kind_check) {
+
+                r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not get LINKINFO: %m");
+
+                r = sd_netlink_message_read_string(message, IFLA_INFO_KIND, &received_kind);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not get KIND: %m");
+
+                r = sd_netlink_message_exit_container(message);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not exit container: %m");
+
+                if (netdev->kind == NETDEV_KIND_TAP)
+                        /* the kernel does not distinguish between tun and tap */
+                        kind = "tun";
+                else {
+                        kind = netdev_kind_to_string(netdev->kind);
+                        if (!kind) {
+                                log_netdev_error(netdev, "Could not get kind");
+                                netdev_enter_failed(netdev);
+                                return -EINVAL;
+                        }
+                }
+
+                if (!streq(kind, received_kind)) {
+                        log_netdev_error(netdev, "Received newlink with wrong KIND %s, expected %s",
+                                         received_kind, kind);
+                        netdev_enter_failed(netdev);
+                        return -EINVAL;
+                }
+        }
+
+        netdev->ifindex = ifindex;
+
+        log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex);
+
+        netdev_enter_ready(netdev);
+
+        return 0;
+}
+
+#define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
+
+int netdev_generate_hw_addr(
+                NetDev *netdev,
+                Link *parent,
+                const char *name,
+                const struct hw_addr_data *hw_addr,
+                struct hw_addr_data *ret) {
+
+        struct hw_addr_data a = HW_ADDR_NULL;
+        bool is_static = false;
+        int r;
+
+        assert(netdev);
+        assert(name);
+        assert(hw_addr);
+        assert(ret);
+
+        if (hw_addr_equal(hw_addr, &HW_ADDR_NONE)) {
+                *ret = HW_ADDR_NULL;
+                return 0;
+        }
+
+        if (hw_addr->length == 0) {
+                uint64_t result;
+
+                /* HardwareAddress= is not specified. */
+
+                if (!NETDEV_VTABLE(netdev)->generate_mac)
+                        goto finalize;
+
+                if (!IN_SET(NETDEV_VTABLE(netdev)->iftype, ARPHRD_ETHER, ARPHRD_INFINIBAND))
+                        goto finalize;
+
+                r = net_get_unique_predictable_data_from_name(name, &HASH_KEY, &result);
+                if (r < 0) {
+                        log_netdev_warning_errno(netdev, r,
+                                                 "Failed to generate persistent MAC address, ignoring: %m");
+                        goto finalize;
+                }
+
+                a.length = arphrd_to_hw_addr_len(NETDEV_VTABLE(netdev)->iftype);
+
+                switch (NETDEV_VTABLE(netdev)->iftype) {
+                case ARPHRD_ETHER:
+                        assert(a.length <= sizeof(result));
+                        memcpy(a.bytes, &result, a.length);
+
+                        if (ether_addr_is_null(&a.ether) || ether_addr_is_broadcast(&a.ether)) {
+                                log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                         "Failed to generate persistent MAC address, ignoring: %m");
+                                a = HW_ADDR_NULL;
+                                goto finalize;
+                        }
+
+                        break;
+                case ARPHRD_INFINIBAND:
+                        if (result == 0) {
+                                log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                         "Failed to generate persistent MAC address: %m");
+                                goto finalize;
+                        }
+
+                        assert(a.length >= sizeof(result));
+                        memzero(a.bytes, a.length - sizeof(result));
+                        memcpy(a.bytes + a.length - sizeof(result), &result, sizeof(result));
+                        break;
+                default:
+                        assert_not_reached();
+                }
+
+        } else {
+                a = *hw_addr;
+                is_static = true;
+        }
+
+        r = net_verify_hardware_address(name, is_static, NETDEV_VTABLE(netdev)->iftype,
+                                        parent ? &parent->hw_addr : NULL, &a);
+        if (r < 0)
+                return r;
+
+finalize:
+        *ret = a;
+        return 0;
+}
+
+static int netdev_create_message(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        int r;
+
+        r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
+        if (r < 0)
+                return r;
+
+        struct hw_addr_data hw_addr;
+        r = netdev_generate_hw_addr(netdev, link, netdev->ifname, &netdev->hw_addr, &hw_addr);
+        if (r < 0)
+                return r;
+
+        if (hw_addr.length > 0) {
+                log_netdev_debug(netdev, "Using MAC address: %s", HW_ADDR_TO_STR(&hw_addr));
+                r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &hw_addr);
+                if (r < 0)
+                        return r;
+        }
+
+        if (netdev->mtu != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
+                if (r < 0)
+                        return r;
+        }
+
+        if (link) {
+                r = sd_netlink_message_append_u32(m, IFLA_LINK, link->ifindex);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
+        if (r < 0)
+                return r;
+
+        if (NETDEV_VTABLE(netdev)->fill_message_create) {
+                r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
+                if (r < 0)
+                        return r;
+
+                r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_close_container(m);
+                if (r < 0)
+                        return r;
+        } else {
+                r = sd_netlink_message_append_string(m, IFLA_INFO_KIND, netdev_kind_to_string(netdev->kind));
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int independent_netdev_create(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+
+        /* create netdev */
+        if (NETDEV_VTABLE(netdev)->create) {
+                r = NETDEV_VTABLE(netdev)->create(netdev);
+                if (r < 0)
+                        return r;
+
+                log_netdev_debug(netdev, "Created");
+                return 0;
+        }
+
+        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
+        if (r < 0)
+                return r;
+
+        r = netdev_create_message(netdev, NULL, m);
+        if (r < 0)
+                return r;
+
+        r = netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return r;
+
+        netdev_ref(netdev);
+
+        netdev->state = NETDEV_STATE_CREATING;
+        log_netdev_debug(netdev, "Creating");
+        return 0;
+}
+
+static int stacked_netdev_create(NetDev *netdev, Link *link, Request *req) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+        assert(link);
+        assert(req);
+
+        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
+        if (r < 0)
+                return r;
+
+        r = netdev_create_message(netdev, link, m);
+        if (r < 0)
+                return r;
+
+        r = request_call_netlink_async(netdev->manager->rtnl, m, req);
+        if (r < 0)
+                return r;
+
+        netdev->state = NETDEV_STATE_CREATING;
+        log_netdev_debug(netdev, "Creating");
+        return 0;
+}
+
+static bool link_is_ready_to_create_stacked_netdev_one(Link *link, bool allow_unmanaged) {
+        assert(link);
+
+        if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
+                return false;
+
+        if (!link->network)
+                return allow_unmanaged;
+
+        if (link->set_link_messages > 0)
+                return false;
+
+        /* If stacked netdevs are created before the underlying interface being activated, then
+         * the activation policy for the netdevs are ignored. See issue #22593. */
+        if (!link->activated)
+                return false;
+
+        return true;
+}
+
+static bool link_is_ready_to_create_stacked_netdev(Link *link) {
+        return check_ready_for_all_sr_iov_ports(link, /* allow_unmanaged = */ false,
+                                                link_is_ready_to_create_stacked_netdev_one);
+}
+
+static int netdev_is_ready_to_create(NetDev *netdev, Link *link) {
+        assert(netdev);
+
+        if (netdev->state != NETDEV_STATE_LOADING)
+                return false;
+
+        if (link && !link_is_ready_to_create_stacked_netdev(link))
+                return false;
+
+        if (NETDEV_VTABLE(netdev)->is_ready_to_create)
+                return NETDEV_VTABLE(netdev)->is_ready_to_create(netdev, link);
+
+        return true;
+}
+
+static int stacked_netdev_process_request(Request *req, Link *link, void *userdata) {
+        NetDev *netdev = ASSERT_PTR(userdata);
+        int r;
+
+        assert(req);
+        assert(link);
+
+        r = netdev_is_ready_to_create(netdev, link);
+        if (r <= 0)
+                return r;
+
+        r = stacked_netdev_create(netdev, link, req);
+        if (r < 0)
+                return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m");
+
+        return 1;
+}
+
+static int create_stacked_netdev_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) {
+        int r;
+
+        assert(m);
+        assert(link);
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_message_warning_errno(link, m, r, "Could not create stacked netdev");
+                link_enter_failed(link);
+                return 0;
+        }
+
+        if (link->create_stacked_netdev_messages == 0) {
+                link->stacked_netdevs_created = true;
+                log_link_debug(link, "Stacked netdevs created.");
+                link_check_ready(link);
+        }
+
+        return 0;
+}
+
+int link_request_stacked_netdev(Link *link, NetDev *netdev) {
+        int r;
+
+        assert(link);
+        assert(netdev);
+
+        if (!netdev_is_stacked(netdev))
+                return -EINVAL;
+
+        if (!IN_SET(netdev->state, NETDEV_STATE_LOADING, NETDEV_STATE_FAILED) || netdev->ifindex > 0)
+                return 0; /* Already created. */
+
+        link->stacked_netdevs_created = false;
+        r = link_queue_request_full(link, REQUEST_TYPE_NETDEV_STACKED,
+                                    netdev_ref(netdev), (mfree_func_t) netdev_unref,
+                                    trivial_hash_func, trivial_compare_func,
+                                    stacked_netdev_process_request,
+                                    &link->create_stacked_netdev_messages,
+                                    create_stacked_netdev_handler, NULL);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to request stacked netdev '%s': %m",
+                                            netdev->ifname);
+
+        log_link_debug(link, "Requested stacked netdev '%s'", netdev->ifname);
+        return 0;
+}
+
+static int independent_netdev_process_request(Request *req, Link *link, void *userdata) {
+        NetDev *netdev = ASSERT_PTR(userdata);
+        int r;
+
+        assert(!link);
+
+        r = netdev_is_ready_to_create(netdev, NULL);
+        if (r <= 0)
+                return r;
+
+        r = independent_netdev_create(netdev);
+        if (r < 0)
+                return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m");
+
+        return 1;
+}
+
+static int netdev_request_to_create(NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+
+        if (netdev_is_stacked(netdev))
+                return 0;
+
+        r = netdev_is_ready_to_create(netdev, NULL);
+        if (r < 0)
+                return r;
+        if (r > 0) {
+                /* If the netdev has no dependency, then create it now. */
+                r = independent_netdev_create(netdev);
+                if (r < 0)
+                        return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m");
+
+        } else {
+                /* Otherwise, wait for the dependencies being resolved. */
+                r = netdev_queue_request(netdev, independent_netdev_process_request, NULL);
+                if (r < 0)
+                        return log_netdev_warning_errno(netdev, r, "Failed to request to create netdev: %m");
+        }
+
+        return 0;
+}
+
+int netdev_load_one(Manager *manager, const char *filename) {
+        _cleanup_(netdev_unrefp) NetDev *netdev_raw = NULL, *netdev = NULL;
+        const char *dropin_dirname;
+        int r;
+
+        assert(manager);
+        assert(filename);
+
+        r = null_or_empty_path(filename);
+        if (r < 0)
+                return log_warning_errno(r, "Failed to check if \"%s\" is empty: %m", filename);
+        if (r > 0) {
+                log_debug("Skipping empty file: %s", filename);
+                return 0;
+        }
+
+        netdev_raw = new(NetDev, 1);
+        if (!netdev_raw)
+                return log_oom();
+
+        *netdev_raw = (NetDev) {
+                .n_ref = 1,
+                .kind = _NETDEV_KIND_INVALID,
+                .state = _NETDEV_STATE_INVALID, /* an invalid state means done() of the implementation won't be called on destruction */
+        };
+
+        dropin_dirname = strjoina(basename(filename), ".d");
+        r = config_parse_many(
+                        STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname,
+                        NETDEV_COMMON_SECTIONS NETDEV_OTHER_SECTIONS,
+                        config_item_perf_lookup, network_netdev_gperf_lookup,
+                        CONFIG_PARSE_WARN,
+                        netdev_raw,
+                        NULL,
+                        NULL);
+        if (r < 0)
+                return r; /* config_parse_many() logs internally. */
+
+        /* skip out early if configuration does not match the environment */
+        if (!condition_test_list(netdev_raw->conditions, environ, NULL, NULL, NULL)) {
+                log_debug("%s: Conditions in the file do not match the system environment, skipping.", filename);
+                return 0;
+        }
+
+        if (netdev_raw->kind == _NETDEV_KIND_INVALID)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev has no Kind= configured in \"%s\", ignoring.", filename);
+
+        if (!netdev_raw->ifname)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "NetDev without Name= configured in \"%s\", ignoring.", filename);
+
+        netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size);
+        if (!netdev)
+                return log_oom();
+
+        netdev->n_ref = 1;
+        netdev->manager = manager;
+        netdev->kind = netdev_raw->kind;
+        netdev->state = NETDEV_STATE_LOADING; /* we initialize the state here for the first time,
+                                                 so that done() will be called on destruction */
+
+        if (NETDEV_VTABLE(netdev)->init)
+                NETDEV_VTABLE(netdev)->init(netdev);
+
+        r = config_parse_many(
+                        STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname,
+                        NETDEV_VTABLE(netdev)->sections,
+                        config_item_perf_lookup, network_netdev_gperf_lookup,
+                        CONFIG_PARSE_WARN,
+                        netdev, NULL, NULL);
+        if (r < 0)
+                return r; /* config_parse_many() logs internally. */
+
+        /* verify configuration */
+        if (NETDEV_VTABLE(netdev)->config_verify) {
+                r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
+                if (r < 0)
+                        return r; /* config_verify() logs internally. */
+        }
+
+        netdev->filename = strdup(filename);
+        if (!netdev->filename)
+                return log_oom();
+
+        r = hashmap_ensure_put(&netdev->manager->netdevs, &string_hash_ops, netdev->ifname, netdev);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r == -EEXIST) {
+                NetDev *n = hashmap_get(netdev->manager->netdevs, netdev->ifname);
+
+                assert(n);
+                if (!streq(netdev->filename, n->filename))
+                        log_netdev_warning_errno(netdev, r,
+                                                 "Device was already configured by \"%s\", ignoring %s.",
+                                                 n->filename, netdev->filename);
+
+                /* Clear ifname before netdev_free() is called. Otherwise, the NetDev object 'n' is
+                 * removed from the hashmap 'manager->netdevs'. */
+                netdev->ifname = mfree(netdev->ifname);
+                return -EEXIST;
+        }
+        assert(r > 0);
+
+        log_netdev_debug(netdev, "loaded \"%s\"", netdev_kind_to_string(netdev->kind));
+
+        r = netdev_request_to_create(netdev);
+        if (r < 0)
+                return r; /* netdev_request_to_create() logs internally. */
+
+        TAKE_PTR(netdev);
+        return 0;
+}
+
+int netdev_load(Manager *manager, bool reload) {
+        _cleanup_strv_free_ char **files = NULL;
+        int r;
+
+        assert(manager);
+
+        if (!reload)
+                hashmap_clear_with_destructor(manager->netdevs, netdev_unref);
+
+        r = conf_files_list_strv(&files, ".netdev", NULL, 0, NETWORK_DIRS);
+        if (r < 0)
+                return log_error_errno(r, "Failed to enumerate netdev files: %m");
+
+        STRV_FOREACH(f, files)
+                (void) netdev_load_one(manager, *f);
+
+        return 0;
+}
+
+int config_parse_netdev_kind(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        NetDevKind k, *kind = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(rvalue);
+
+        k = netdev_kind_from_string(rvalue);
+        if (k < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, k, "Failed to parse netdev kind, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (*kind != _NETDEV_KIND_INVALID && *kind != k) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified netdev kind is different from the previous value '%s', ignoring assignment: %s",
+                           netdev_kind_to_string(*kind), rvalue);
+                return 0;
+        }
+
+        *kind = k;
+
+        return 0;
+}
+
+int config_parse_netdev_hw_addr(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        struct hw_addr_data *hw_addr = ASSERT_PTR(data);
+
+        assert(rvalue);
+
+        if (streq(rvalue, "none")) {
+                *hw_addr = HW_ADDR_NONE;
+                return 0;
+        }
+
+        return config_parse_hw_addr(unit, filename, line, section, section_line, lvalue, ltype, rvalue, data, userdata);
+}
diff --git a/src/network/netdev/netdev.h b/src/network/netdev/netdev.h
new file mode 100644
index 0000000..49eadbb
--- /dev/null
+++ b/src/network/netdev/netdev.h
@@ -0,0 +1,262 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "sd-netlink.h"
+
+#include "conf-parser.h"
+#include "ether-addr-util.h"
+#include "list.h"
+#include "log-link.h"
+#include "networkd-link.h"
+#include "time-util.h"
+
+/* Special hardware address value to suppress generating persistent hardware address for the netdev. */
+#define HW_ADDR_NONE ((struct hw_addr_data) { .length = 1, })
+
+#define NETDEV_COMMON_SECTIONS "Match\0NetDev\0"
+/* This is the list of known sections. We need to ignore them in the initial parsing phase. */
+#define NETDEV_OTHER_SECTIONS                     \
+        "-BareUDP\0"                              \
+        "-BatmanAdvanced\0"                       \
+        "-Bond\0"                                 \
+        "-Bridge\0"                               \
+        "-FooOverUDP\0"                           \
+        "-GENEVE\0"                               \
+        "-IPoIB\0"                                \
+        "-IPVLAN\0"                               \
+        "-IPVTAP\0"                               \
+        "-L2TP\0"                                 \
+        "-L2TPSession\0"                          \
+        "-MACsec\0"                               \
+        "-MACsecReceiveAssociation\0"             \
+        "-MACsecReceiveChannel\0"                 \
+        "-MACsecTransmitAssociation\0"            \
+        "-MACVLAN\0"                              \
+        "-MACVTAP\0"                              \
+        "-Peer\0"                                 \
+        "-Tap\0"                                  \
+        "-Tun\0"                                  \
+        "-Tunnel\0"                               \
+        "-VLAN\0"                                 \
+        "-VRF\0"                                  \
+        "-VXCAN\0"                                \
+        "-VXLAN\0"                                \
+        "-WLAN\0"                                 \
+        "-WireGuard\0"                            \
+        "-WireGuardPeer\0"                        \
+        "-Xfrm\0"
+
+typedef enum NetDevKind {
+        NETDEV_KIND_BAREUDP,
+        NETDEV_KIND_BATADV,
+        NETDEV_KIND_BOND,
+        NETDEV_KIND_BRIDGE,
+        NETDEV_KIND_DUMMY,
+        NETDEV_KIND_ERSPAN,
+        NETDEV_KIND_FOU,
+        NETDEV_KIND_GENEVE,
+        NETDEV_KIND_GRE,
+        NETDEV_KIND_GRETAP,
+        NETDEV_KIND_IFB,
+        NETDEV_KIND_IP6GRE,
+        NETDEV_KIND_IP6GRETAP,
+        NETDEV_KIND_IP6TNL,
+        NETDEV_KIND_IPIP,
+        NETDEV_KIND_IPOIB,
+        NETDEV_KIND_IPVLAN,
+        NETDEV_KIND_IPVTAP,
+        NETDEV_KIND_L2TP,
+        NETDEV_KIND_MACSEC,
+        NETDEV_KIND_MACVLAN,
+        NETDEV_KIND_MACVTAP,
+        NETDEV_KIND_NETDEVSIM,
+        NETDEV_KIND_NLMON,
+        NETDEV_KIND_SIT,
+        NETDEV_KIND_TAP,
+        NETDEV_KIND_TUN,
+        NETDEV_KIND_VCAN,
+        NETDEV_KIND_VETH,
+        NETDEV_KIND_VLAN,
+        NETDEV_KIND_VRF,
+        NETDEV_KIND_VTI,
+        NETDEV_KIND_VTI6,
+        NETDEV_KIND_VXCAN,
+        NETDEV_KIND_VXLAN,
+        NETDEV_KIND_WIREGUARD,
+        NETDEV_KIND_WLAN,
+        NETDEV_KIND_XFRM,
+        _NETDEV_KIND_MAX,
+        _NETDEV_KIND_TUNNEL, /* Used by config_parse_stacked_netdev() */
+        _NETDEV_KIND_INVALID = -EINVAL,
+} NetDevKind;
+
+typedef enum NetDevState {
+        NETDEV_STATE_LOADING,
+        NETDEV_STATE_FAILED,
+        NETDEV_STATE_CREATING,
+        NETDEV_STATE_READY,
+        NETDEV_STATE_LINGER,
+        _NETDEV_STATE_MAX,
+        _NETDEV_STATE_INVALID = -EINVAL,
+} NetDevState;
+
+typedef enum NetDevCreateType {
+        NETDEV_CREATE_INDEPENDENT,
+        NETDEV_CREATE_STACKED,
+        _NETDEV_CREATE_MAX,
+        _NETDEV_CREATE_INVALID = -EINVAL,
+} NetDevCreateType;
+
+typedef struct Manager Manager;
+typedef struct Condition Condition;
+
+typedef struct NetDev {
+        Manager *manager;
+
+        unsigned n_ref;
+
+        char *filename;
+
+        LIST_HEAD(Condition, conditions);
+
+        NetDevState state;
+        NetDevKind kind;
+        char *description;
+        char *ifname;
+        struct hw_addr_data hw_addr;
+        uint32_t mtu;
+        int ifindex;
+} NetDev;
+
+typedef struct NetDevVTable {
+        /* How much memory does an object of this unit type need */
+        size_t object_size;
+
+        /* Config file sections this netdev kind understands, separated
+         * by NUL chars */
+        const char *sections;
+
+        /* This should reset all type-specific variables. This should
+         * not allocate memory, and is called with zero-initialized
+         * data. It should hence only initialize variables that need
+         * to be set != 0. */
+        void (*init)(NetDev *n);
+
+        /* This is called when the interface is removed. */
+        void (*drop)(NetDev *n);
+
+        /* This should free all kind-specific variables. It should be
+         * idempotent. */
+        void (*done)(NetDev *n);
+
+        /* fill in message to create netdev */
+        int (*fill_message_create)(NetDev *netdev, Link *link, sd_netlink_message *message);
+
+        /* specifies if netdev is independent, or a master device or a stacked device */
+        NetDevCreateType create_type;
+
+        /* This is used for stacked netdev. Return true when the underlying link is ready. */
+        int (*is_ready_to_create)(NetDev *netdev, Link *link);
+
+        /* create netdev, if not done via rtnl */
+        int (*create)(NetDev *netdev);
+
+        /* perform additional configuration after netdev has been createad */
+        int (*post_create)(NetDev *netdev, Link *link);
+
+        /* verify that compulsory configuration options were specified */
+        int (*config_verify)(NetDev *netdev, const char *filename);
+
+        /* expected iftype, e.g. ARPHRD_ETHER. */
+        uint16_t iftype;
+
+        /* Generate MAC address when MACAddress= is not specified. */
+        bool generate_mac;
+
+        /* When assigning ifindex to the netdev, skip to check if the netdev kind matches. */
+        bool skip_netdev_kind_check;
+} NetDevVTable;
+
+extern const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX];
+
+#define NETDEV_VTABLE(n) ((n)->kind != _NETDEV_KIND_INVALID ? netdev_vtable[(n)->kind] : NULL)
+
+/* For casting a netdev into the various netdev kinds */
+#define DEFINE_NETDEV_CAST(UPPERCASE, MixedCase)                            \
+        static inline MixedCase* UPPERCASE(NetDev *n) {                     \
+                if (_unlikely_(!n ||                                        \
+                               n->kind != NETDEV_KIND_##UPPERCASE) ||       \
+                               n->state == _NETDEV_STATE_INVALID)           \
+                        return NULL;                                        \
+                                                                            \
+                return (MixedCase*) n;                                      \
+        }
+
+/* For casting the various netdev kinds into a netdev */
+#define NETDEV(n) (&(n)->meta)
+
+int netdev_load(Manager *manager, bool reload);
+int netdev_load_one(Manager *manager, const char *filename);
+void netdev_drop(NetDev *netdev);
+void netdev_enter_failed(NetDev *netdev);
+
+NetDev *netdev_unref(NetDev *netdev);
+NetDev *netdev_ref(NetDev *netdev);
+DEFINE_TRIVIAL_DESTRUCTOR(netdev_destroy_callback, NetDev, netdev_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
+
+bool netdev_is_managed(NetDev *netdev);
+int netdev_get(Manager *manager, const char *name, NetDev **ret);
+int netdev_set_ifindex(NetDev *netdev, sd_netlink_message *newlink);
+int netdev_generate_hw_addr(NetDev *netdev, Link *link, const char *name,
+                            const struct hw_addr_data *hw_addr, struct hw_addr_data *ret);
+
+int link_request_stacked_netdev(Link *link, NetDev *netdev);
+
+const char *netdev_kind_to_string(NetDevKind d) _const_;
+NetDevKind netdev_kind_from_string(const char *d) _pure_;
+
+static inline NetDevCreateType netdev_get_create_type(NetDev *netdev) {
+        assert(netdev);
+        assert(NETDEV_VTABLE(netdev));
+
+        return NETDEV_VTABLE(netdev)->create_type;
+}
+
+CONFIG_PARSER_PROTOTYPE(config_parse_netdev_kind);
+CONFIG_PARSER_PROTOTYPE(config_parse_netdev_hw_addr);
+
+/* gperf */
+const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
+
+/* Macros which append INTERFACE= to the message */
+
+#define log_netdev_full_errno_zerook(netdev, level, error, ...)         \
+        ({                                                              \
+                const NetDev *_n = (netdev);                            \
+                log_interface_full_errno_zerook(_n ? _n->ifname : NULL, level, error, __VA_ARGS__); \
+        })
+
+#define log_netdev_full_errno(netdev, level, error, ...) \
+        ({                                                              \
+                int _error = (error);                                   \
+                ASSERT_NON_ZERO(_error);                                \
+                log_netdev_full_errno_zerook(netdev, level, _error, __VA_ARGS__); \
+        })
+
+#define log_netdev_full(netdev, level, ...) (void) log_netdev_full_errno_zerook(netdev, level, 0, __VA_ARGS__)
+
+#define log_netdev_debug(netdev, ...)   log_netdev_full(netdev, LOG_DEBUG, __VA_ARGS__)
+#define log_netdev_info(netdev, ...)    log_netdev_full(netdev, LOG_INFO, __VA_ARGS__)
+#define log_netdev_notice(netdev, ...)  log_netdev_full(netdev, LOG_NOTICE, __VA_ARGS__)
+#define log_netdev_warning(netdev, ...) log_netdev_full(netdev, LOG_WARNING,  __VA_ARGS__)
+#define log_netdev_error(netdev, ...)   log_netdev_full(netdev, LOG_ERR, __VA_ARGS__)
+
+#define log_netdev_debug_errno(netdev, error, ...)   log_netdev_full_errno(netdev, LOG_DEBUG, error, __VA_ARGS__)
+#define log_netdev_info_errno(netdev, error, ...)    log_netdev_full_errno(netdev, LOG_INFO, error, __VA_ARGS__)
+#define log_netdev_notice_errno(netdev, error, ...)  log_netdev_full_errno(netdev, LOG_NOTICE, error, __VA_ARGS__)
+#define log_netdev_warning_errno(netdev, error, ...) log_netdev_full_errno(netdev, LOG_WARNING, error, __VA_ARGS__)
+#define log_netdev_error_errno(netdev, error, ...)   log_netdev_full_errno(netdev, LOG_ERR, error, __VA_ARGS__)
+
+#define LOG_NETDEV_MESSAGE(netdev, fmt, ...) "MESSAGE=%s: " fmt, (netdev)->ifname, ##__VA_ARGS__
+#define LOG_NETDEV_INTERFACE(netdev) "INTERFACE=%s", (netdev)->ifname
diff --git a/src/network/netdev/netdevsim.c b/src/network/netdev/netdevsim.c
new file mode 100644
index 0000000..15d5c13
--- /dev/null
+++ b/src/network/netdev/netdevsim.c
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+
+#include "netdevsim.h"
+
+const NetDevVTable netdevsim_vtable = {
+        .object_size = sizeof(NetDevSim),
+        .sections = NETDEV_COMMON_SECTIONS,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/netdevsim.h b/src/network/netdev/netdevsim.h
new file mode 100644
index 0000000..27adc59
--- /dev/null
+++ b/src/network/netdev/netdevsim.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct NetDevSim NetDevSim;
+
+#include "netdev.h"
+
+struct NetDevSim {
+        NetDev meta;
+};
+
+DEFINE_NETDEV_CAST(NETDEVSIM, NetDevSim);
+extern const NetDevVTable netdevsim_vtable;
diff --git a/src/network/netdev/nlmon.c b/src/network/netdev/nlmon.c
new file mode 100644
index 0000000..ff37209
--- /dev/null
+++ b/src/network/netdev/nlmon.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+
+#include "nlmon.h"
+
+static int netdev_nlmon_verify(NetDev *netdev, const char *filename) {
+        assert(netdev);
+        assert(filename);
+
+        if (netdev->hw_addr.length > 0) {
+                log_netdev_warning(netdev, "%s: MACAddress= is not supported. Ignoring", filename);
+                netdev->hw_addr = HW_ADDR_NULL;
+        }
+
+        return 0;
+}
+
+const NetDevVTable nlmon_vtable = {
+        .object_size = sizeof(NLMon),
+        .sections = NETDEV_COMMON_SECTIONS,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_nlmon_verify,
+        .iftype = ARPHRD_NETLINK,
+};
diff --git a/src/network/netdev/nlmon.h b/src/network/netdev/nlmon.h
new file mode 100644
index 0000000..edfc504
--- /dev/null
+++ b/src/network/netdev/nlmon.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct NLMon NLMon;
+
+#include "netdev.h"
+
+struct NLMon {
+        NetDev meta;
+};
+
+DEFINE_NETDEV_CAST(NLMON, NLMon);
+
+extern const NetDevVTable nlmon_vtable;
diff --git a/src/network/netdev/tunnel.c b/src/network/netdev/tunnel.c
new file mode 100644
index 0000000..db414a8
--- /dev/null
+++ b/src/network/netdev/tunnel.c
@@ -0,0 +1,1318 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/in.h>
+#include <linux/fou.h>
+#include <linux/if_arp.h>
+#include <linux/if_tunnel.h>
+#include <linux/ip.h>
+#include <linux/ip6_tunnel.h>
+
+#include "af-list.h"
+#include "conf-parser.h"
+#include "hexdecoct.h"
+#include "missing_network.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "siphash24.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "tunnel.h"
+#include "util.h"
+
+#define DEFAULT_IPV6_TTL   64
+#define IP6_FLOWINFO_FLOWLABEL  htobe32(0x000FFFFF)
+#define IP6_TNL_F_ALLOW_LOCAL_REMOTE 0x40
+
+static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = {
+        [NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6",
+        [NETDEV_IP6_TNL_MODE_IPIP6] = "ipip6",
+        [NETDEV_IP6_TNL_MODE_ANYIP6] = "any",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode, Ip6TnlMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode, ip6tnl_mode, Ip6TnlMode, "Failed to parse ip6 tunnel Mode");
+
+#define HASH_KEY SD_ID128_MAKE(74,c4,de,12,f3,d9,41,34,bb,3d,c1,a4,42,93,50,87)
+
+int dhcp4_pd_create_6rd_tunnel_name(Link *link, char **ret) {
+        _cleanup_free_ char *ifname_alloc = NULL;
+        uint8_t ipv4masklen, sixrd_prefixlen, *buf, *p;
+        struct in_addr ipv4address;
+        struct in6_addr sixrd_prefix;
+        char ifname[IFNAMSIZ];
+        uint64_t result;
+        size_t sz;
+        int r;
+
+        assert(link);
+        assert(link->dhcp_lease);
+
+        r = sd_dhcp_lease_get_address(link->dhcp_lease, &ipv4address);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to get DHCPv4 address: %m");
+
+        r = sd_dhcp_lease_get_6rd(link->dhcp_lease, &ipv4masklen, &sixrd_prefixlen, &sixrd_prefix, NULL, NULL);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to get 6rd option: %m");
+
+        sz = sizeof(uint8_t) * 2 + sizeof(struct in6_addr) + sizeof(struct in_addr);
+        buf = newa(uint8_t, sz);
+        p = buf;
+        p = mempcpy(p, &ipv4masklen, sizeof(uint8_t));
+        p = mempcpy(p, &ipv4address, sizeof(struct in_addr));
+        p = mempcpy(p, &sixrd_prefixlen, sizeof(uint8_t));
+        p = mempcpy(p, &sixrd_prefix, sizeof(struct in6_addr));
+
+        result = siphash24(buf, sz, HASH_KEY.bytes);
+        memcpy(ifname, "6rd-", STRLEN("6rd-"));
+        ifname[STRLEN("6rd-")    ] = urlsafe_base64char(result >> 54);
+        ifname[STRLEN("6rd-") + 1] = urlsafe_base64char(result >> 48);
+        ifname[STRLEN("6rd-") + 2] = urlsafe_base64char(result >> 42);
+        ifname[STRLEN("6rd-") + 3] = urlsafe_base64char(result >> 36);
+        ifname[STRLEN("6rd-") + 4] = urlsafe_base64char(result >> 30);
+        ifname[STRLEN("6rd-") + 5] = urlsafe_base64char(result >> 24);
+        ifname[STRLEN("6rd-") + 6] = urlsafe_base64char(result >> 18);
+        ifname[STRLEN("6rd-") + 7] = urlsafe_base64char(result >> 12);
+        ifname[STRLEN("6rd-") + 8] = urlsafe_base64char(result >> 6);
+        ifname[STRLEN("6rd-") + 9] = urlsafe_base64char(result);
+        ifname[STRLEN("6rd-") + 10] = '\0';
+        assert_cc(STRLEN("6rd-") + 10 <= IFNAMSIZ);
+
+        ifname_alloc = strdup(ifname);
+        if (!ifname_alloc)
+                return log_oom_debug();
+
+        *ret = TAKE_PTR(ifname_alloc);
+        return 0;
+}
+
+static int dhcp4_pd_create_6rd_tunnel_message(
+                Link *link,
+                sd_netlink_message *m,
+                const struct in_addr *ipv4address,
+                uint8_t ipv4masklen,
+                const struct in6_addr *sixrd_prefix,
+                uint8_t sixrd_prefixlen) {
+        int r;
+
+        r = sd_netlink_message_append_string(m, IFLA_IFNAME, link->dhcp4_6rd_tunnel_name);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "sit");
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, ipv4address);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, 64);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_6RD_PREFIX, sixrd_prefix);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_PREFIXLEN, sixrd_prefixlen);
+        if (r < 0)
+                return r;
+
+        struct in_addr relay_prefix = *ipv4address;
+        (void) in4_addr_mask(&relay_prefix, ipv4masklen);
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_6RD_RELAY_PREFIX, relay_prefix.s_addr);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, ipv4masklen);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int dhcp4_pd_create_6rd_tunnel(Link *link, link_netlink_message_handler_t callback) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        uint8_t ipv4masklen, sixrd_prefixlen;
+        struct in_addr ipv4address;
+        struct in6_addr sixrd_prefix;
+        int r;
+
+        assert(link);
+        assert(link->ifindex > 0);
+        assert(link->manager);
+        assert(link->dhcp_lease);
+        assert(link->dhcp4_6rd_tunnel_name);
+        assert(callback);
+
+        r = sd_dhcp_lease_get_address(link->dhcp_lease, &ipv4address);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to get DHCPv4 address: %m");
+
+        r = sd_dhcp_lease_get_6rd(link->dhcp_lease, &ipv4masklen, &sixrd_prefixlen, &sixrd_prefix, NULL, NULL);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to get 6rd option: %m");
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, 0);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to create netlink message: %m");
+
+        r = dhcp4_pd_create_6rd_tunnel_message(link, m,
+                                               &ipv4address, ipv4masklen,
+                                               &sixrd_prefix, sixrd_prefixlen);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Failed to fill netlink message: %m");
+
+        r = netlink_call_async(link->manager->rtnl, NULL, m, callback,
+                               link_netlink_destroy_callback, link);
+        if (r < 0)
+                return log_link_debug_errno(link, r, "Could not send netlink message: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
+static int tunnel_get_local_address(Tunnel *t, Link *link, union in_addr_union *ret) {
+        assert(t);
+
+        if (t->local_type < 0) {
+                if (ret)
+                        *ret = t->local;
+                return 0;
+        }
+
+        return link_get_local_address(link, t->local_type, t->family, NULL, ret);
+}
+
+static int netdev_ipip_sit_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        if (netdev->kind == NETDEV_KIND_IPIP)
+                t = IPIP(netdev);
+        else
+                t = SIT(netdev);
+
+        assert(t);
+
+        if (t->external) {
+                r = sd_netlink_message_append_flag(m, IFLA_IPTUN_COLLECT_METADATA);
+                if (r < 0)
+                        return r;
+
+                /* If external mode is enabled, then the following settings should not be appended. */
+                return 0;
+        }
+
+        if (link || t->assign_to_loopback) {
+                r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+                if (r < 0)
+                        return r;
+        }
+
+        r = tunnel_get_local_address(t, link, &local);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &local.in);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
+        if (r < 0)
+                return r;
+
+        if (t->fou_tunnel) {
+                r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_TYPE, t->fou_encap_type);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_SPORT, htobe16(t->encap_src_port));
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_DPORT, htobe16(t->fou_destination_port));
+                if (r < 0)
+                        return r;
+        }
+
+        if (netdev->kind == NETDEV_KIND_SIT) {
+                if (t->sixrd_prefixlen > 0) {
+                        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_6RD_PREFIX, &t->sixrd_prefix);
+                        if (r < 0)
+                                return r;
+
+                        /* u16 is deliberate here, even though we're passing a netmask that can never be >128. The kernel is
+                         * expecting to receive the prefixlen as a u16.
+                         */
+                        r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_PREFIXLEN, t->sixrd_prefixlen);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (t->isatap >= 0) {
+                        uint16_t flags = 0;
+
+                        SET_FLAG(flags, SIT_ISATAP, t->isatap);
+
+                        r = sd_netlink_message_append_u16(m, IFLA_IPTUN_FLAGS, flags);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        return 0;
+}
+
+static int netdev_gre_erspan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        uint32_t ikey = 0;
+        uint32_t okey = 0;
+        uint16_t iflags = 0;
+        uint16_t oflags = 0;
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_GRE:
+                t = GRE(netdev);
+                break;
+        case NETDEV_KIND_ERSPAN:
+                t = ERSPAN(netdev);
+                break;
+        case NETDEV_KIND_GRETAP:
+                t = GRETAP(netdev);
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        assert(t);
+
+        if (t->external) {
+                r = sd_netlink_message_append_flag(m, IFLA_GRE_COLLECT_METADATA);
+                if (r < 0)
+                        return r;
+
+                /* If external mode is enabled, then the following settings should not be appended. */
+                return 0;
+        }
+
+        if (link || t->assign_to_loopback) {
+                r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+                if (r < 0)
+                        return r;
+        }
+
+        if (netdev->kind == NETDEV_KIND_ERSPAN) {
+                r = sd_netlink_message_append_u8(m, IFLA_GRE_ERSPAN_VER, t->erspan_version);
+                if (r < 0)
+                        return r;
+
+                if (t->erspan_version == 1) {
+                        r = sd_netlink_message_append_u32(m, IFLA_GRE_ERSPAN_INDEX, t->erspan_index);
+                        if (r < 0)
+                                return r;
+
+                } else if (t->erspan_version == 2) {
+                        r = sd_netlink_message_append_u8(m, IFLA_GRE_ERSPAN_DIR, t->erspan_direction);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_netlink_message_append_u16(m, IFLA_GRE_ERSPAN_HWID, t->erspan_hwid);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        r = tunnel_get_local_address(t, link, &local);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_GRE_LOCAL, &local.in);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TOS, t->tos);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_PMTUDISC, t->pmtudisc);
+        if (r < 0)
+                return r;
+
+        if (t->key != 0) {
+                ikey = okey = htobe32(t->key);
+                iflags |= GRE_KEY;
+                oflags |= GRE_KEY;
+        }
+
+        if (t->ikey != 0) {
+                ikey = htobe32(t->ikey);
+                iflags |= GRE_KEY;
+        }
+
+        if (t->okey != 0) {
+                okey = htobe32(t->okey);
+                oflags |= GRE_KEY;
+        }
+
+        if (t->gre_erspan_sequence > 0) {
+                iflags |= GRE_SEQ;
+                oflags |= GRE_SEQ;
+        } else if (t->gre_erspan_sequence == 0) {
+                iflags &= ~GRE_SEQ;
+                oflags &= ~GRE_SEQ;
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_IKEY, ikey);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_OKEY, okey);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_GRE_IFLAGS, iflags);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_GRE_OFLAGS, oflags);
+        if (r < 0)
+                return r;
+
+        if (t->fou_tunnel) {
+                r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_TYPE, t->fou_encap_type);
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_SPORT, htobe16(t->encap_src_port));
+                if (r < 0)
+                        return r;
+
+                r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_DPORT, htobe16(t->fou_destination_port));
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int netdev_ip6gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        uint32_t ikey = 0;
+        uint32_t okey = 0;
+        uint16_t iflags = 0;
+        uint16_t oflags = 0;
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        if (netdev->kind == NETDEV_KIND_IP6GRE)
+                t = IP6GRE(netdev);
+        else
+                t = IP6GRETAP(netdev);
+
+        assert(t);
+
+        if (t->external) {
+                r = sd_netlink_message_append_flag(m, IFLA_GRE_COLLECT_METADATA);
+                if (r < 0)
+                        return r;
+
+                /* If external mode is enabled, then the following settings should not be appended. */
+                return 0;
+        }
+
+        if (link || t->assign_to_loopback) {
+                r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+                if (r < 0)
+                        return r;
+        }
+
+        r = tunnel_get_local_address(t, link, &local);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_LOCAL, &local.in6);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_REMOTE, &t->remote.in6);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
+        if (r < 0)
+                return r;
+
+        if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_GRE_FLOWINFO, t->ipv6_flowlabel);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_FLAGS, t->flags);
+        if (r < 0)
+                return r;
+
+        if (t->key != 0) {
+                ikey = okey = htobe32(t->key);
+                iflags |= GRE_KEY;
+                oflags |= GRE_KEY;
+        }
+
+        if (t->ikey != 0) {
+                ikey = htobe32(t->ikey);
+                iflags |= GRE_KEY;
+        }
+
+        if (t->okey != 0) {
+                okey = htobe32(t->okey);
+                oflags |= GRE_KEY;
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_IKEY, ikey);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, IFLA_GRE_OKEY, okey);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_GRE_IFLAGS, iflags);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_GRE_OFLAGS, oflags);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        uint32_t ikey, okey;
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        if (netdev->kind == NETDEV_KIND_VTI)
+                t = VTI(netdev);
+        else
+                t = VTI6(netdev);
+
+        assert(t);
+
+        if (link || t->assign_to_loopback) {
+                r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+                if (r < 0)
+                        return r;
+        }
+
+        if (t->key != 0)
+                ikey = okey = htobe32(t->key);
+        else {
+                ikey = htobe32(t->ikey);
+                okey = htobe32(t->okey);
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_VTI_IKEY, ikey);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, IFLA_VTI_OKEY, okey);
+        if (r < 0)
+                return r;
+
+        r = tunnel_get_local_address(t, link, &local);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
+
+        r = netlink_message_append_in_addr_union(m, IFLA_VTI_LOCAL, t->family, &local);
+        if (r < 0)
+                return r;
+
+        r = netlink_message_append_in_addr_union(m, IFLA_VTI_REMOTE, t->family, &t->remote);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        uint8_t proto;
+        Tunnel *t;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        t = IP6TNL(netdev);
+
+        assert(t);
+
+        switch (t->ip6tnl_mode) {
+        case NETDEV_IP6_TNL_MODE_IP6IP6:
+                proto = IPPROTO_IPV6;
+                break;
+        case NETDEV_IP6_TNL_MODE_IPIP6:
+                proto = IPPROTO_IPIP;
+                break;
+        case NETDEV_IP6_TNL_MODE_ANYIP6:
+        default:
+                proto = 0;
+                break;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PROTO, proto);
+        if (r < 0)
+                return r;
+
+        if (t->external) {
+                r = sd_netlink_message_append_flag(m, IFLA_IPTUN_COLLECT_METADATA);
+                if (r < 0)
+                        return r;
+
+                /* If external mode is enabled, then the following settings should not be appended. */
+                return 0;
+        }
+
+        if (link || t->assign_to_loopback) {
+                r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+                if (r < 0)
+                        return r;
+        }
+
+        r = tunnel_get_local_address(t, link, &local);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_LOCAL, &local.in6);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in6);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+        if (r < 0)
+                return r;
+
+        if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
+                r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLOWINFO, t->ipv6_flowlabel);
+                if (r < 0)
+                        return r;
+        }
+
+        if (t->copy_dscp)
+                t->flags |= IP6_TNL_F_RCV_DSCP_COPY;
+
+        if (t->allow_localremote >= 0)
+                SET_FLAG(t->flags, IP6_TNL_F_ALLOW_LOCAL_REMOTE, t->allow_localremote);
+
+        r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLAGS, t->flags);
+        if (r < 0)
+                return r;
+
+        if (t->encap_limit != 0) {
+                r = sd_netlink_message_append_u8(m, IFLA_IPTUN_ENCAP_LIMIT, t->encap_limit);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int netdev_tunnel_is_ready_to_create(NetDev *netdev, Link *link) {
+        Tunnel *t;
+
+        assert(netdev);
+
+        t = TUNNEL(netdev);
+
+        assert(t);
+
+        if (t->independent)
+                return true;
+
+        return tunnel_get_local_address(t, link, NULL) >= 0;
+}
+
+static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
+        Tunnel *t;
+
+        assert(netdev);
+        assert(filename);
+
+        t = TUNNEL(netdev);
+
+        assert(t);
+
+        if (netdev->kind == NETDEV_KIND_IP6TNL &&
+            t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "ip6tnl without mode configured in %s. Ignoring", filename);
+
+        if (t->external) {
+                if (IN_SET(netdev->kind, NETDEV_KIND_VTI, NETDEV_KIND_VTI6))
+                        log_netdev_debug(netdev, "vti/vti6 tunnel do not support external mode, ignoring.");
+                else {
+                        /* tunnel with external mode does not require underlying interface. */
+                        t->independent = true;
+
+                        /* tunnel with external mode does not require any settings checked below. */
+                        return 0;
+                }
+        }
+
+        if (IN_SET(netdev->kind, NETDEV_KIND_VTI, NETDEV_KIND_IPIP, NETDEV_KIND_SIT, NETDEV_KIND_GRE) &&
+            !IN_SET(t->family, AF_UNSPEC, AF_INET))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "vti/ipip/sit/gre tunnel without a local/remote IPv4 address configured in %s. Ignoring", filename);
+
+        if (IN_SET(netdev->kind, NETDEV_KIND_GRETAP, NETDEV_KIND_ERSPAN) &&
+            (t->family != AF_INET || !in_addr_is_set(t->family, &t->remote)))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "gretap/erspan tunnel without a remote IPv4 address configured in %s. Ignoring", filename);
+
+        if ((IN_SET(netdev->kind, NETDEV_KIND_VTI6, NETDEV_KIND_IP6TNL) && t->family != AF_INET6) ||
+            (netdev->kind == NETDEV_KIND_IP6GRE && !IN_SET(t->family, AF_UNSPEC, AF_INET6)))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "vti6/ip6tnl/ip6gre tunnel without a local/remote IPv6 address configured in %s. Ignoring", filename);
+
+        if (netdev->kind == NETDEV_KIND_IP6GRETAP &&
+            (t->family != AF_INET6 || !in_addr_is_set(t->family, &t->remote)))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "ip6gretap tunnel without a remote IPv6 address configured in %s. Ignoring", filename);
+
+        if (t->fou_tunnel && t->fou_destination_port <= 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "FooOverUDP missing port configured in %s. Ignoring", filename);
+
+        /* netlink_message_append_in_addr_union() is used for vti/vti6. So, t->family cannot be AF_UNSPEC. */
+        if (netdev->kind == NETDEV_KIND_VTI)
+                t->family = AF_INET;
+
+        if (t->assign_to_loopback)
+                t->independent = true;
+
+        if (t->independent && t->local_type >= 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "The local address cannot be '%s' when Independent= or AssignToLoopback= is enabled, ignoring.",
+                                              strna(netdev_local_address_type_to_string(t->local_type)));
+
+        return 0;
+}
+
+static int unset_local(Tunnel *t) {
+        assert(t);
+
+        /* Unset the previous assignment. */
+        t->local = IN_ADDR_NULL;
+        t->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
+
+        /* If the remote address is not specified, also clear the address family. */
+        if (!in_addr_is_set(t->family, &t->remote))
+                t->family = AF_UNSPEC;
+
+        return 0;
+}
+
+int config_parse_tunnel_local_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        union in_addr_union buffer = IN_ADDR_NULL;
+        NetDevLocalAddressType type;
+        Tunnel *t = ASSERT_PTR(userdata);
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue) || streq(rvalue, "any"))
+                return unset_local(t);
+
+        type = netdev_local_address_type_from_string(rvalue);
+        if (IN_SET(type, NETDEV_LOCAL_ADDRESS_IPV4LL, NETDEV_LOCAL_ADDRESS_DHCP4))
+                f = AF_INET;
+        else if (IN_SET(type, NETDEV_LOCAL_ADDRESS_IPV6LL, NETDEV_LOCAL_ADDRESS_DHCP6, NETDEV_LOCAL_ADDRESS_SLAAC))
+                f = AF_INET6;
+        else {
+                type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
+                r = in_addr_from_string_auto(rvalue, &f, &buffer);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Tunnel address \"%s\" invalid, ignoring assignment: %m", rvalue);
+                        return 0;
+                }
+
+                if (in_addr_is_null(f, &buffer))
+                        return unset_local(t);
+        }
+
+        if (t->family != AF_UNSPEC && t->family != f) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Address family does not match the previous assignment, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        t->family = f;
+        t->local = buffer;
+        t->local_type = type;
+        return 0;
+}
+
+static int unset_remote(Tunnel *t) {
+        assert(t);
+
+        /* Unset the previous assignment. */
+        t->remote = IN_ADDR_NULL;
+
+        /* If the local address is not specified, also clear the address family. */
+        if (t->local_type == _NETDEV_LOCAL_ADDRESS_TYPE_INVALID &&
+            !in_addr_is_set(t->family, &t->local))
+                t->family = AF_UNSPEC;
+
+        return 0;
+}
+
+int config_parse_tunnel_remote_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        union in_addr_union buffer;
+        Tunnel *t = ASSERT_PTR(userdata);
+        int r, f;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue) || streq(rvalue, "any"))
+                return unset_remote(t);
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Tunnel address \"%s\" invalid, ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        if (in_addr_is_null(f, &buffer))
+                return unset_remote(t);
+
+        if (t->family != AF_UNSPEC && t->family != f) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Address family does not match the previous assignment, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        t->family = f;
+        t->remote = buffer;
+        return 0;
+}
+
+int config_parse_tunnel_key(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint32_t *dest = ASSERT_PTR(data), k;
+        union in_addr_union buffer;
+        int r;
+
+        assert(filename);
+        assert(rvalue);
+
+        r = in_addr_from_string(AF_INET, rvalue, &buffer);
+        if (r < 0) {
+                r = safe_atou32(rvalue, &k);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse tunnel key ignoring assignment: %s", rvalue);
+                        return 0;
+                }
+        } else
+                k = be32toh(buffer.in.s_addr);
+
+        *dest = k;
+        return 0;
+}
+
+int config_parse_ipv6_flowlabel(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Tunnel *t = ASSERT_PTR(userdata);
+        int k, r;
+
+        assert(filename);
+        assert(rvalue);
+
+        if (streq(rvalue, "inherit")) {
+                t->ipv6_flowlabel = IP6_FLOWINFO_FLOWLABEL;
+                t->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
+                return 0;
+        }
+
+        r = safe_atoi(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse tunnel IPv6 flowlabel, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (k > 0xFFFFF) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid tunnel IPv6 flowlabel, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        t->ipv6_flowlabel = htobe32(k) & IP6_FLOWINFO_FLOWLABEL;
+        t->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
+        return 0;
+}
+
+int config_parse_encap_limit(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Tunnel *t = ASSERT_PTR(userdata);
+        int k, r;
+
+        assert(filename);
+        assert(rvalue);
+
+        if (streq(rvalue, "none")) {
+                t->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
+                t->encap_limit = 0;
+                return 0;
+        }
+
+        r = safe_atoi(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse Tunnel Encapsulation Limit option, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        if (k > 255 || k < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid Tunnel Encapsulation value, ignoring assignment: %d", k);
+                return 0;
+        }
+
+        t->encap_limit = k;
+        t->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
+        return 0;
+}
+
+int config_parse_6rd_prefix(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Tunnel *t = userdata;
+        union in_addr_union p;
+        uint8_t l;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = in_addr_prefix_from_string(rvalue, AF_INET6, &p, &l);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse 6rd prefix \"%s\", ignoring: %m", rvalue);
+                return 0;
+        }
+        if (l == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "6rd prefix length of \"%s\" must be greater than zero, ignoring", rvalue);
+                return 0;
+        }
+
+        t->sixrd_prefix = p.in6;
+        t->sixrd_prefixlen = l;
+
+        return 0;
+}
+
+int config_parse_erspan_version(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint8_t n, *v = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *v = 1; /* defaults to 1 */
+                return 0;
+        }
+
+        r = safe_atou8(rvalue, &n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse erspan version \"%s\", ignoring: %m", rvalue);
+                return 0;
+        }
+        if (!IN_SET(n, 0, 1, 2)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid erspan version \"%s\", which must be 0, 1 or 2, ignoring.", rvalue);
+                return 0;
+        }
+
+        *v = n;
+        return 0;
+}
+
+int config_parse_erspan_index(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint32_t n, *v = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *v = 0; /* defaults to 0 */
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse erspan index \"%s\", ignoring: %m", rvalue);
+                return 0;
+        }
+        if (n >= 0x100000) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid erspan index \"%s\", which must be less than 0x100000, ignoring.", rvalue);
+                return 0;
+        }
+
+        *v = n;
+        return 0;
+}
+
+int config_parse_erspan_direction(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint8_t *v = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue) || streq(rvalue, "ingress"))
+                *v = 0; /* defaults to ingress */
+        else if (streq(rvalue, "egress"))
+                *v = 1;
+        else
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid erspan direction \"%s\", which must be \"ingress\" or \"egress\", ignoring.", rvalue);
+
+        return 0;
+}
+
+int config_parse_erspan_hwid(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint16_t n, *v = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *v = 0; /* defaults to 0 */
+                return 0;
+        }
+
+        r = safe_atou16(rvalue, &n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse erspan hwid \"%s\", ignoring: %m", rvalue);
+                return 0;
+        }
+        if (n >= 64) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid erspan index \"%s\", which must be less than 64, ignoring.", rvalue);
+                return 0;
+        }
+
+        *v = n;
+        return 0;
+}
+
+static void netdev_tunnel_init(NetDev *netdev) {
+        Tunnel *t;
+
+        assert(netdev);
+
+        t = TUNNEL(netdev);
+
+        assert(t);
+
+        t->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
+        t->pmtudisc = true;
+        t->fou_encap_type = NETDEV_FOO_OVER_UDP_ENCAP_DIRECT;
+        t->isatap = -1;
+        t->gre_erspan_sequence = -1;
+        t->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
+        t->ip6tnl_mode = _NETDEV_IP6_TNL_MODE_INVALID;
+        t->ipv6_flowlabel = _NETDEV_IPV6_FLOWLABEL_INVALID;
+        t->allow_localremote = -1;
+        t->erspan_version = 1;
+
+        if (IN_SET(netdev->kind, NETDEV_KIND_IP6GRE, NETDEV_KIND_IP6GRETAP, NETDEV_KIND_IP6TNL))
+                t->ttl = DEFAULT_IPV6_TTL;
+}
+
+const NetDevVTable ipip_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_ipip_sit_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_TUNNEL,
+};
+
+const NetDevVTable sit_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_ipip_sit_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_SIT,
+};
+
+const NetDevVTable vti_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_vti_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_TUNNEL,
+};
+
+const NetDevVTable vti6_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_vti_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_TUNNEL6,
+};
+
+const NetDevVTable gre_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_gre_erspan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_IPGRE,
+};
+
+const NetDevVTable gretap_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_gre_erspan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
+
+const NetDevVTable ip6gre_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_ip6gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_IP6GRE,
+};
+
+const NetDevVTable ip6gretap_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_ip6gre_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
+
+const NetDevVTable ip6tnl_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_ip6tnl_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_TUNNEL6,
+};
+
+const NetDevVTable erspan_vtable = {
+        .object_size = sizeof(Tunnel),
+        .init = netdev_tunnel_init,
+        .sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
+        .fill_message_create = netdev_gre_erspan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_tunnel_is_ready_to_create,
+        .config_verify = netdev_tunnel_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/tunnel.h b/src/network/netdev/tunnel.h
new file mode 100644
index 0000000..7c81f22
--- /dev/null
+++ b/src/network/netdev/tunnel.h
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "in-addr-util.h"
+
+#include "conf-parser.h"
+#include "fou-tunnel.h"
+#include "netdev-util.h"
+#include "netdev.h"
+#include "networkd-link.h"
+
+typedef enum Ip6TnlMode {
+        NETDEV_IP6_TNL_MODE_IP6IP6,
+        NETDEV_IP6_TNL_MODE_IPIP6,
+        NETDEV_IP6_TNL_MODE_ANYIP6,
+        _NETDEV_IP6_TNL_MODE_MAX,
+        _NETDEV_IP6_TNL_MODE_INVALID = -EINVAL,
+} Ip6TnlMode;
+
+typedef enum IPv6FlowLabel {
+        NETDEV_IPV6_FLOWLABEL_INHERIT = 0xFFFFF + 1,
+        _NETDEV_IPV6_FLOWLABEL_MAX,
+        _NETDEV_IPV6_FLOWLABEL_INVALID = -EINVAL,
+} IPv6FlowLabel;
+
+typedef struct Tunnel {
+        NetDev meta;
+
+        uint8_t encap_limit;
+
+        int family;
+        int ipv6_flowlabel;
+        int allow_localremote;
+        int gre_erspan_sequence;
+        int isatap;
+
+        unsigned ttl;
+        unsigned tos;
+        unsigned flags;
+
+        uint32_t key;
+        uint32_t ikey;
+        uint32_t okey;
+
+        uint8_t erspan_version;
+        uint32_t erspan_index;    /* version 1 */
+        uint8_t erspan_direction; /* version 2 */
+        uint16_t erspan_hwid;     /* version 2 */
+
+        NetDevLocalAddressType local_type;
+        union in_addr_union local;
+        union in_addr_union remote;
+
+        Ip6TnlMode ip6tnl_mode;
+        FooOverUDPEncapType fou_encap_type;
+
+        bool pmtudisc;
+        bool copy_dscp;
+        bool independent;
+        bool fou_tunnel;
+        bool assign_to_loopback;
+        bool external; /* a.k.a collect metadata mode */
+
+        uint16_t encap_src_port;
+        uint16_t fou_destination_port;
+
+        struct in6_addr sixrd_prefix;
+        uint8_t sixrd_prefixlen;
+} Tunnel;
+
+int dhcp4_pd_create_6rd_tunnel_name(Link *link, char **ret);
+int dhcp4_pd_create_6rd_tunnel(Link *link, link_netlink_message_handler_t callback);
+
+DEFINE_NETDEV_CAST(IPIP, Tunnel);
+DEFINE_NETDEV_CAST(GRE, Tunnel);
+DEFINE_NETDEV_CAST(GRETAP, Tunnel);
+DEFINE_NETDEV_CAST(IP6GRE, Tunnel);
+DEFINE_NETDEV_CAST(IP6GRETAP, Tunnel);
+DEFINE_NETDEV_CAST(SIT, Tunnel);
+DEFINE_NETDEV_CAST(VTI, Tunnel);
+DEFINE_NETDEV_CAST(VTI6, Tunnel);
+DEFINE_NETDEV_CAST(IP6TNL, Tunnel);
+DEFINE_NETDEV_CAST(ERSPAN, Tunnel);
+
+static inline Tunnel* TUNNEL(NetDev *netdev) {
+        assert(netdev);
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_IPIP:
+                return IPIP(netdev);
+        case NETDEV_KIND_SIT:
+                return SIT(netdev);
+        case NETDEV_KIND_GRE:
+                return GRE(netdev);
+        case NETDEV_KIND_GRETAP:
+                return GRETAP(netdev);
+        case NETDEV_KIND_IP6GRE:
+                return IP6GRE(netdev);
+        case NETDEV_KIND_IP6GRETAP:
+                return IP6GRETAP(netdev);
+        case NETDEV_KIND_VTI:
+                return VTI(netdev);
+        case NETDEV_KIND_VTI6:
+                return VTI6(netdev);
+        case NETDEV_KIND_IP6TNL:
+                return IP6TNL(netdev);
+        case NETDEV_KIND_ERSPAN:
+                return ERSPAN(netdev);
+        default:
+                return NULL;
+        }
+}
+
+extern const NetDevVTable ipip_vtable;
+extern const NetDevVTable sit_vtable;
+extern const NetDevVTable vti_vtable;
+extern const NetDevVTable vti6_vtable;
+extern const NetDevVTable gre_vtable;
+extern const NetDevVTable gretap_vtable;
+extern const NetDevVTable ip6gre_vtable;
+extern const NetDevVTable ip6gretap_vtable;
+extern const NetDevVTable ip6tnl_vtable;
+extern const NetDevVTable erspan_vtable;
+
+const char *ip6tnl_mode_to_string(Ip6TnlMode d) _const_;
+Ip6TnlMode ip6tnl_mode_from_string(const char *d) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_ip6tnl_mode);
+CONFIG_PARSER_PROTOTYPE(config_parse_tunnel_local_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_tunnel_remote_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_ipv6_flowlabel);
+CONFIG_PARSER_PROTOTYPE(config_parse_encap_limit);
+CONFIG_PARSER_PROTOTYPE(config_parse_tunnel_key);
+CONFIG_PARSER_PROTOTYPE(config_parse_6rd_prefix);
+CONFIG_PARSER_PROTOTYPE(config_parse_erspan_version);
+CONFIG_PARSER_PROTOTYPE(config_parse_erspan_index);
+CONFIG_PARSER_PROTOTYPE(config_parse_erspan_direction);
+CONFIG_PARSER_PROTOTYPE(config_parse_erspan_hwid);
diff --git a/src/network/netdev/tuntap.c b/src/network/netdev/tuntap.c
new file mode 100644
index 0000000..10c93be
--- /dev/null
+++ b/src/network/netdev/tuntap.c
@@ -0,0 +1,261 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <netinet/if_ether.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <linux/if_tun.h>
+
+#include "alloc-util.h"
+#include "daemon-util.h"
+#include "fd-util.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "socket-util.h"
+#include "tuntap.h"
+#include "user-util.h"
+
+#define TUN_DEV "/dev/net/tun"
+
+static TunTap* TUNTAP(NetDev *netdev) {
+        assert(netdev);
+
+        switch (netdev->kind) {
+        case NETDEV_KIND_TAP:
+                return TAP(netdev);
+        case NETDEV_KIND_TUN:
+                return TUN(netdev);
+        default:
+                return NULL;
+        }
+}
+
+static void *close_fd_ptr(void *p) {
+        safe_close(PTR_TO_FD(p));
+        return NULL;
+}
+
+DEFINE_PRIVATE_HASH_OPS_FULL(named_fd_hash_ops, char, string_hash_func, string_compare_func, free, void, close_fd_ptr);
+
+int manager_add_tuntap_fd(Manager *m, int fd, const char *name) {
+        _cleanup_free_ char *tuntap_name = NULL;
+        const char *p;
+        int r;
+
+        assert(m);
+        assert(fd >= 0);
+        assert(name);
+
+        p = startswith(name, "tuntap-");
+        if (!p)
+                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Received unknown fd (%s).", name);
+
+        if (!ifname_valid(p))
+                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Received tuntap fd with invalid name (%s).", p);
+
+        tuntap_name = strdup(p);
+        if (!tuntap_name)
+                return log_oom_debug();
+
+        r = hashmap_ensure_put(&m->tuntap_fds_by_name, &named_fd_hash_ops, tuntap_name, FD_TO_PTR(fd));
+        if (r < 0)
+                return log_debug_errno(r, "Failed to store tuntap fd: %m");
+
+        TAKE_PTR(tuntap_name);
+        return 0;
+}
+
+void manager_clear_unmanaged_tuntap_fds(Manager *m) {
+        char *name;
+        void *p;
+
+        assert(m);
+
+        while ((p = hashmap_steal_first_key_and_value(m->tuntap_fds_by_name, (void**) &name))) {
+                close_and_notify_warn(PTR_TO_FD(p), name);
+                name = mfree(name);
+        }
+}
+
+static int tuntap_take_fd(NetDev *netdev) {
+        _cleanup_free_ char *name = NULL;
+        void *p;
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+
+        r = link_get_by_name(netdev->manager, netdev->ifname, NULL);
+        if (r < 0)
+                return r;
+
+        p = hashmap_remove2(netdev->manager->tuntap_fds_by_name, netdev->ifname, (void**) &name);
+        if (!p)
+                return -ENOENT;
+
+        log_netdev_debug(netdev, "Found file descriptor in fd store.");
+        return PTR_TO_FD(p);
+}
+
+static int netdev_create_tuntap(NetDev *netdev) {
+        _cleanup_close_ int fd = -1;
+        struct ifreq ifr = {};
+        TunTap *t;
+        int r;
+
+        assert(netdev);
+        t = TUNTAP(netdev);
+        assert(t);
+
+        fd = TAKE_FD(t->fd);
+        if (fd < 0)
+                fd = tuntap_take_fd(netdev);
+        if (fd < 0)
+                fd = open(TUN_DEV, O_RDWR|O_CLOEXEC);
+        if (fd < 0)
+                return log_netdev_error_errno(netdev, errno,  "Failed to open " TUN_DEV ": %m");
+
+        if (netdev->kind == NETDEV_KIND_TAP)
+                ifr.ifr_flags |= IFF_TAP;
+        else
+                ifr.ifr_flags |= IFF_TUN;
+
+        if (!t->packet_info)
+                ifr.ifr_flags |= IFF_NO_PI;
+
+        if (t->multi_queue)
+                ifr.ifr_flags |= IFF_MULTI_QUEUE;
+
+        if (t->vnet_hdr)
+                ifr.ifr_flags |= IFF_VNET_HDR;
+
+        strncpy(ifr.ifr_name, netdev->ifname, IFNAMSIZ-1);
+
+        if (ioctl(fd, TUNSETIFF, &ifr) < 0)
+                return log_netdev_error_errno(netdev, errno, "TUNSETIFF failed: %m");
+
+        if (t->multi_queue) {
+                /* If we don't detach the queue, the kernel will send packets to our queue and they
+                 * will be dropped because we never read them, which is especially important in case
+                 * of KeepCarrier option which persists open FD. So detach our queue right after
+                 * device create/attach to make kernel not send the packets to it. The option is
+                 * available for multi-queue devices only.
+                 *
+                 * See https://github.com/systemd/systemd/pull/30504 for details. */
+                struct ifreq detach_request = { .ifr_flags = IFF_DETACH_QUEUE };
+                if (ioctl(fd, TUNSETQUEUE, &detach_request) < 0)
+                        return log_netdev_error_errno(netdev, errno, "TUNSETQUEUE failed: %m");
+        }
+
+        if (t->user_name) {
+                const char *user = t->user_name;
+                uid_t uid;
+
+                r = get_user_creds(&user, &uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Cannot resolve user name %s: %m", t->user_name);
+
+                if (ioctl(fd, TUNSETOWNER, uid) < 0)
+                        return log_netdev_error_errno(netdev, errno, "TUNSETOWNER failed: %m");
+        }
+
+        if (t->group_name) {
+                const char *group = t->group_name;
+                gid_t gid;
+
+                r = get_group_creds(&group, &gid, USER_CREDS_ALLOW_MISSING);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Cannot resolve group name %s: %m", t->group_name);
+
+                if (ioctl(fd, TUNSETGROUP, gid) < 0)
+                        return log_netdev_error_errno(netdev, errno, "TUNSETGROUP failed: %m");
+
+        }
+
+        if (ioctl(fd, TUNSETPERSIST, 1) < 0)
+                return log_netdev_error_errno(netdev, errno, "TUNSETPERSIST failed: %m");
+
+        if (t->keep_fd) {
+                t->fd = TAKE_FD(fd);
+                (void) notify_push_fdf(t->fd, "tuntap-%s", netdev->ifname);
+        }
+
+        return 0;
+}
+
+static void tuntap_init(NetDev *netdev) {
+        TunTap *t;
+
+        assert(netdev);
+        t = TUNTAP(netdev);
+        assert(t);
+
+        t->fd = -1;
+}
+
+static void tuntap_drop(NetDev *netdev) {
+        TunTap *t;
+
+        assert(netdev);
+        t = TUNTAP(netdev);
+        assert(t);
+
+        t->fd = close_and_notify_warn(t->fd, netdev->ifname);
+}
+
+static void tuntap_done(NetDev *netdev) {
+        TunTap *t;
+
+        assert(netdev);
+        t = TUNTAP(netdev);
+        assert(t);
+
+        t->fd = safe_close(t->fd);
+        t->user_name = mfree(t->user_name);
+        t->group_name = mfree(t->group_name);
+}
+
+static int tuntap_verify(NetDev *netdev, const char *filename) {
+        assert(netdev);
+
+        if (netdev->mtu != 0)
+                log_netdev_warning(netdev,
+                                   "MTUBytes= configured for %s device in %s will be ignored.\n"
+                                   "Please set it in the corresponding .network file.",
+                                   netdev_kind_to_string(netdev->kind), filename);
+
+        if (netdev->hw_addr.length > 0)
+                log_netdev_warning(netdev,
+                                   "MACAddress= configured for %s device in %s will be ignored.\n"
+                                   "Please set it in the corresponding .network file.",
+                                   netdev_kind_to_string(netdev->kind), filename);
+
+        return 0;
+}
+
+const NetDevVTable tun_vtable = {
+        .object_size = sizeof(TunTap),
+        .sections = NETDEV_COMMON_SECTIONS "Tun\0",
+        .config_verify = tuntap_verify,
+        .init = tuntap_init,
+        .drop = tuntap_drop,
+        .done = tuntap_done,
+        .create = netdev_create_tuntap,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_NONE,
+};
+
+const NetDevVTable tap_vtable = {
+        .object_size = sizeof(TunTap),
+        .sections = NETDEV_COMMON_SECTIONS "Tap\0",
+        .config_verify = tuntap_verify,
+        .init = tuntap_init,
+        .drop = tuntap_drop,
+        .done = tuntap_done,
+        .create = netdev_create_tuntap,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+};
diff --git a/src/network/netdev/tuntap.h b/src/network/netdev/tuntap.h
new file mode 100644
index 0000000..88e0ce5
--- /dev/null
+++ b/src/network/netdev/tuntap.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct TunTap TunTap;
+
+#include "netdev.h"
+
+struct TunTap {
+        NetDev meta;
+
+        int fd;
+        char *user_name;
+        char *group_name;
+        bool multi_queue;
+        bool packet_info;
+        bool vnet_hdr;
+        bool keep_fd;
+};
+
+DEFINE_NETDEV_CAST(TUN, TunTap);
+DEFINE_NETDEV_CAST(TAP, TunTap);
+extern const NetDevVTable tun_vtable;
+extern const NetDevVTable tap_vtable;
+
+int manager_add_tuntap_fd(Manager *m, int fd, const char *name);
+void manager_clear_unmanaged_tuntap_fds(Manager *m);
diff --git a/src/network/netdev/vcan.c b/src/network/netdev/vcan.c
new file mode 100644
index 0000000..380547e
--- /dev/null
+++ b/src/network/netdev/vcan.c
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+
+#include "vcan.h"
+
+const NetDevVTable vcan_vtable = {
+        .object_size = sizeof(VCan),
+        .sections = NETDEV_COMMON_SECTIONS,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_CAN,
+};
diff --git a/src/network/netdev/vcan.h b/src/network/netdev/vcan.h
new file mode 100644
index 0000000..843984f
--- /dev/null
+++ b/src/network/netdev/vcan.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct VCan VCan;
+
+#include <netinet/in.h>
+#include <linux/can/netlink.h>
+
+#include "netdev.h"
+
+struct VCan {
+        NetDev meta;
+};
+
+DEFINE_NETDEV_CAST(VCAN, VCan);
+
+extern const NetDevVTable vcan_vtable;
diff --git a/src/network/netdev/veth.c b/src/network/netdev/veth.c
new file mode 100644
index 0000000..fb00e66
--- /dev/null
+++ b/src/network/netdev/veth.c
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+#include <linux/veth.h>
+
+#include "netlink-util.h"
+#include "veth.h"
+
+static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        struct hw_addr_data hw_addr;
+        Veth *v;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
+        if (r < 0)
+                return r;
+
+        if (v->ifname_peer) {
+                r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
+                if (r < 0)
+                        return r;
+        }
+
+        r = netdev_generate_hw_addr(netdev, NULL, v->ifname_peer, &v->hw_addr_peer, &hw_addr);
+        if (r < 0)
+                return r;
+
+        if (hw_addr.length > 0) {
+                log_netdev_debug(netdev, "Using MAC address for peer: %s", HW_ADDR_TO_STR(&hw_addr));
+                r = netlink_message_append_hw_addr(m, IFLA_ADDRESS, &hw_addr);
+                if (r < 0)
+                        return r;
+        }
+
+        if (netdev->mtu != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_veth_verify(NetDev *netdev, const char *filename) {
+        Veth *v;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        if (!v->ifname_peer)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "Veth NetDev without peer name configured in %s. Ignoring",
+                                                filename);
+
+        return 0;
+}
+
+static void veth_done(NetDev *n) {
+        Veth *v;
+
+        assert(n);
+
+        v = VETH(n);
+
+        assert(v);
+
+        free(v->ifname_peer);
+}
+
+const NetDevVTable veth_vtable = {
+        .object_size = sizeof(Veth),
+        .sections = NETDEV_COMMON_SECTIONS "Peer\0",
+        .done = veth_done,
+        .fill_message_create = netdev_veth_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_veth_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/veth.h b/src/network/netdev/veth.h
new file mode 100644
index 0000000..e0d6fd4
--- /dev/null
+++ b/src/network/netdev/veth.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct Veth Veth;
+
+#include "netdev.h"
+
+struct Veth {
+        NetDev meta;
+
+        char *ifname_peer;
+        struct hw_addr_data hw_addr_peer;
+};
+
+DEFINE_NETDEV_CAST(VETH, Veth);
+extern const NetDevVTable veth_vtable;
diff --git a/src/network/netdev/vlan.c b/src/network/netdev/vlan.c
new file mode 100644
index 0000000..5eb36ef
--- /dev/null
+++ b/src/network/netdev/vlan.c
@@ -0,0 +1,234 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <net/if.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+
+#include "parse-util.h"
+#include "vlan-util.h"
+#include "vlan.h"
+
+static int netdev_vlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
+        struct ifla_vlan_flags flags = {};
+        VLan *v;
+        int r;
+
+        assert(netdev);
+        assert(link);
+        assert(req);
+
+        v = VLAN(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_append_u16(req, IFLA_VLAN_ID, v->id);
+        if (r < 0)
+                return r;
+
+        if (v->protocol >= 0) {
+                r = sd_netlink_message_append_u16(req, IFLA_VLAN_PROTOCOL, htobe16(v->protocol));
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->gvrp != -1) {
+                flags.mask |= VLAN_FLAG_GVRP;
+                SET_FLAG(flags.flags, VLAN_FLAG_GVRP, v->gvrp);
+        }
+
+        if (v->mvrp != -1) {
+                flags.mask |= VLAN_FLAG_MVRP;
+                SET_FLAG(flags.flags, VLAN_FLAG_MVRP, v->mvrp);
+        }
+
+        if (v->reorder_hdr != -1) {
+                flags.mask |= VLAN_FLAG_REORDER_HDR;
+                SET_FLAG(flags.flags, VLAN_FLAG_REORDER_HDR, v->reorder_hdr);
+        }
+
+        if (v->loose_binding != -1) {
+                flags.mask |= VLAN_FLAG_LOOSE_BINDING;
+                SET_FLAG(flags.flags, VLAN_FLAG_LOOSE_BINDING, v->loose_binding);
+        }
+
+        r = sd_netlink_message_append_data(req, IFLA_VLAN_FLAGS, &flags, sizeof(struct ifla_vlan_flags));
+        if (r < 0)
+                return r;
+
+        if (!set_isempty(v->egress_qos_maps)) {
+                struct ifla_vlan_qos_mapping *m;
+
+                r = sd_netlink_message_open_container(req, IFLA_VLAN_EGRESS_QOS);
+                if (r < 0)
+                        return r;
+
+                SET_FOREACH(m, v->egress_qos_maps) {
+                        r = sd_netlink_message_append_data(req, IFLA_VLAN_QOS_MAPPING, m, sizeof(struct ifla_vlan_qos_mapping));
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return r;
+        }
+
+        if (!set_isempty(v->ingress_qos_maps)) {
+                struct ifla_vlan_qos_mapping *m;
+
+                r = sd_netlink_message_open_container(req, IFLA_VLAN_INGRESS_QOS);
+                if (r < 0)
+                        return r;
+
+                SET_FOREACH(m, v->ingress_qos_maps) {
+                        r = sd_netlink_message_append_data(req, IFLA_VLAN_QOS_MAPPING, m, sizeof(struct ifla_vlan_qos_mapping));
+                        if (r < 0)
+                                return r;
+                }
+
+                r = sd_netlink_message_close_container(req);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static void vlan_qos_maps_hash_func(const struct ifla_vlan_qos_mapping *x, struct siphash *state) {
+        siphash24_compress(&x->from, sizeof(x->from), state);
+        siphash24_compress(&x->to, sizeof(x->to), state);
+}
+
+static int vlan_qos_maps_compare_func(const struct ifla_vlan_qos_mapping *a, const struct ifla_vlan_qos_mapping *b) {
+        int r;
+
+        r = CMP(a->from, b->from);
+        if (r != 0)
+                return r;
+
+        return CMP(a->to, b->to);
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+                vlan_qos_maps_hash_ops,
+                struct ifla_vlan_qos_mapping,
+                vlan_qos_maps_hash_func,
+                vlan_qos_maps_compare_func,
+                free);
+
+int config_parse_vlan_qos_maps(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Set **s = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *s = set_free(*s);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ struct ifla_vlan_qos_mapping *m = NULL;
+                _cleanup_free_ char *w = NULL;
+                unsigned from, to;
+
+                r = extract_first_word(&p, &w, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s, ignoring: %s", lvalue, rvalue);
+                        return 0;
+                }
+                if (r == 0)
+                        return 0;
+
+                r = parse_range(w, &from, &to);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s, ignoring: %s", lvalue, w);
+                        continue;
+                }
+
+                m = new(struct ifla_vlan_qos_mapping, 1);
+                if (!m)
+                        return log_oom();
+
+                *m = (struct ifla_vlan_qos_mapping) {
+                        .from = from,
+                        .to = to,
+                };
+
+                r = set_ensure_consume(s, &vlan_qos_maps_hash_ops, TAKE_PTR(m));
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to store %s, ignoring: %s", lvalue, w);
+                        continue;
+                }
+        }
+}
+
+static int netdev_vlan_verify(NetDev *netdev, const char *filename) {
+        VLan *v;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VLAN(netdev);
+
+        assert(v);
+
+        if (v->id == VLANID_INVALID) {
+                log_netdev_warning(netdev, "VLAN without valid Id (%"PRIu16") configured in %s.", v->id, filename);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static void vlan_done(NetDev *n) {
+        VLan *v;
+
+        v = VLAN(n);
+
+        assert(v);
+
+        set_free(v->egress_qos_maps);
+        set_free(v->ingress_qos_maps);
+}
+
+static void vlan_init(NetDev *netdev) {
+        VLan *v = VLAN(netdev);
+
+        assert(netdev);
+        assert(v);
+
+        v->id = VLANID_INVALID;
+        v->protocol = -1;
+        v->gvrp = -1;
+        v->mvrp = -1;
+        v->loose_binding = -1;
+        v->reorder_hdr = -1;
+}
+
+const NetDevVTable vlan_vtable = {
+        .object_size = sizeof(VLan),
+        .init = vlan_init,
+        .sections = NETDEV_COMMON_SECTIONS "VLAN\0",
+        .fill_message_create = netdev_vlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .config_verify = netdev_vlan_verify,
+        .done = vlan_done,
+        .iftype = ARPHRD_ETHER,
+};
diff --git a/src/network/netdev/vlan.h b/src/network/netdev/vlan.h
new file mode 100644
index 0000000..1e5e590
--- /dev/null
+++ b/src/network/netdev/vlan.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct VLan VLan;
+
+#include "netdev.h"
+#include "set.h"
+
+struct VLan {
+        NetDev meta;
+
+        uint16_t id;
+        int protocol;
+
+        int gvrp;
+        int mvrp;
+        int loose_binding;
+        int reorder_hdr;
+
+        Set *egress_qos_maps;
+        Set *ingress_qos_maps;
+};
+
+DEFINE_NETDEV_CAST(VLAN, VLan);
+extern const NetDevVTable vlan_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_vlan_qos_maps);
diff --git a/src/network/netdev/vrf.c b/src/network/netdev/vrf.c
new file mode 100644
index 0000000..05ef3ff
--- /dev/null
+++ b/src/network/netdev/vrf.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "vrf.h"
+
+static int netdev_vrf_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Vrf *v;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        v = VRF(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_append_u32(m, IFLA_VRF_TABLE, v->table);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+const NetDevVTable vrf_vtable = {
+        .object_size = sizeof(Vrf),
+        .sections = NETDEV_COMMON_SECTIONS "VRF\0",
+        .fill_message_create = netdev_vrf_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/vrf.h b/src/network/netdev/vrf.h
new file mode 100644
index 0000000..87977e2
--- /dev/null
+++ b/src/network/netdev/vrf.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct Vrf Vrf;
+
+#include "netdev.h"
+
+struct Vrf {
+        NetDev meta;
+
+        uint32_t table;
+};
+
+DEFINE_NETDEV_CAST(VRF, Vrf);
+extern const NetDevVTable vrf_vtable;
diff --git a/src/network/netdev/vxcan.c b/src/network/netdev/vxcan.c
new file mode 100644
index 0000000..83269b0
--- /dev/null
+++ b/src/network/netdev/vxcan.c
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/can/vxcan.h>
+#include <linux/if_arp.h>
+
+#include "vxcan.h"
+
+static int netdev_vxcan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        VxCan *v;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        v = VXCAN(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_open_container(m, VXCAN_INFO_PEER);
+        if (r < 0)
+                return r;
+
+        if (v->ifname_peer) {
+                r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int netdev_vxcan_verify(NetDev *netdev, const char *filename) {
+        VxCan *v;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VXCAN(netdev);
+
+        assert(v);
+
+        if (!v->ifname_peer)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "VxCan NetDev without peer name configured in %s. Ignoring", filename);
+
+        return 0;
+}
+
+static void vxcan_done(NetDev *n) {
+        VxCan *v;
+
+        assert(n);
+
+        v = VXCAN(n);
+
+        assert(v);
+
+        free(v->ifname_peer);
+}
+
+const NetDevVTable vxcan_vtable = {
+        .object_size = sizeof(VxCan),
+        .sections = NETDEV_COMMON_SECTIONS "VXCAN\0",
+        .done = vxcan_done,
+        .fill_message_create = netdev_vxcan_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_vxcan_verify,
+        .iftype = ARPHRD_CAN,
+};
diff --git a/src/network/netdev/vxcan.h b/src/network/netdev/vxcan.h
new file mode 100644
index 0000000..47be3f0
--- /dev/null
+++ b/src/network/netdev/vxcan.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct VxCan VxCan;
+
+#include "netdev.h"
+
+struct VxCan {
+        NetDev meta;
+
+        char *ifname_peer;
+};
+
+DEFINE_NETDEV_CAST(VXCAN, VxCan);
+
+extern const NetDevVTable vxcan_vtable;
diff --git a/src/network/netdev/vxlan.c b/src/network/netdev/vxlan.c
new file mode 100644
index 0000000..5891619
--- /dev/null
+++ b/src/network/netdev/vxlan.c
@@ -0,0 +1,468 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+
+#include "conf-parser.h"
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "parse-util.h"
+#include "vxlan.h"
+
+static const char* const df_table[_NETDEV_VXLAN_DF_MAX] = {
+        [NETDEV_VXLAN_DF_NO] = "no",
+        [NETDEV_VXLAN_DF_YES] = "yes",
+        [NETDEV_VXLAN_DF_INHERIT] = "inherit",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(df, VxLanDF, NETDEV_VXLAN_DF_YES);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_df, df, VxLanDF, "Failed to parse VXLAN IPDoNotFragment= setting");
+
+static int vxlan_get_local_address(VxLan *v, Link *link, int *ret_family, union in_addr_union *ret_address) {
+        assert(v);
+
+        if (v->local_type < 0) {
+                if (ret_family)
+                        *ret_family = v->local_family;
+                if (ret_address)
+                        *ret_address = v->local;
+                return 0;
+        }
+
+        return link_get_local_address(link, v->local_type, v->local_family, ret_family, ret_address);
+}
+
+static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        union in_addr_union local;
+        int local_family, r;
+        VxLan *v;
+
+        assert(netdev);
+        assert(m);
+
+        v = VXLAN(netdev);
+
+        assert(v);
+
+        if (v->vni <= VXLAN_VID_MAX) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_ID, v->vni);
+                if (r < 0)
+                        return r;
+        }
+
+        if (in_addr_is_set(v->group_family, &v->group)) {
+                if (v->group_family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->group.in);
+                else
+                        r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_GROUP6, &v->group.in6);
+                if (r < 0)
+                        return r;
+        } else if (in_addr_is_set(v->remote_family, &v->remote)) {
+                if (v->remote_family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_GROUP, &v->remote.in);
+                else
+                        r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_GROUP6, &v->remote.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        r = vxlan_get_local_address(v, link, &local_family, &local);
+        if (r < 0)
+                return r;
+
+        if (in_addr_is_set(local_family, &local)) {
+                if (local_family == AF_INET)
+                        r = sd_netlink_message_append_in_addr(m, IFLA_VXLAN_LOCAL, &local.in);
+                else
+                        r = sd_netlink_message_append_in6_addr(m, IFLA_VXLAN_LOCAL6, &local.in6);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LINK, link ? link->ifindex : 0);
+        if (r < 0)
+                return r;
+
+        if (v->inherit) {
+                r = sd_netlink_message_append_flag(m, IFLA_VXLAN_TTL_INHERIT);
+                if (r < 0)
+                        return r;
+        } else {
+                r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->tos != 0) {
+                r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TOS, v->tos);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_LEARNING, v->learning);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_RSC, v->route_short_circuit);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_PROXY, v->arp_proxy);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L2MISS, v->l2miss);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_L3MISS, v->l3miss);
+        if (r < 0)
+                return r;
+
+        if (v->fdb_ageing != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_AGEING, v->fdb_ageing / USEC_PER_SEC);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->max_fdb != 0) {
+                r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LIMIT, v->max_fdb);
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_CSUM, v->udpcsum);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_TX, v->remote_csum_tx);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u8(m, IFLA_VXLAN_REMCSUM_RX, v->remote_csum_rx);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
+        if (r < 0)
+                return r;
+
+        if (v->port_range.low != 0 || v->port_range.high != 0) {
+                struct ifla_vxlan_port_range port_range;
+
+                port_range.low = htobe16(v->port_range.low);
+                port_range.high = htobe16(v->port_range.high);
+
+                r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
+                if (r < 0)
+                        return r;
+        }
+
+        r = sd_netlink_message_append_u32(m, IFLA_VXLAN_LABEL, htobe32(v->flow_label));
+        if (r < 0)
+                return r;
+
+        if (v->group_policy) {
+                r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->generic_protocol_extension) {
+                r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GPE);
+                if (r < 0)
+                        return r;
+        }
+
+        if (v->df != _NETDEV_VXLAN_DF_INVALID) {
+                r = sd_netlink_message_append_u8(m, IFLA_VXLAN_DF, v->df);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int config_parse_vxlan_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        VxLan *v = ASSERT_PTR(userdata);
+        union in_addr_union *addr = data, buffer;
+        int *family, f, r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(lvalue, "Local"))
+                family = &v->local_family;
+        else if (streq(lvalue, "Remote"))
+                family = &v->remote_family;
+        else if (streq(lvalue, "Group"))
+                family = &v->group_family;
+        else
+                assert_not_reached();
+
+        if (isempty(rvalue)) {
+                *addr = IN_ADDR_NULL;
+                *family = AF_UNSPEC;
+                return 0;
+        }
+
+        if (streq(lvalue, "Local")) {
+                NetDevLocalAddressType t;
+
+                t = netdev_local_address_type_from_string(rvalue);
+                if (t >= 0) {
+                        v->local = IN_ADDR_NULL;
+                        v->local_family = AF_UNSPEC;
+                        v->local_type = t;
+                        return 0;
+                }
+        }
+
+        r = in_addr_from_string_auto(rvalue, &f, &buffer);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        r = in_addr_is_multicast(f, &buffer);
+
+        if (streq(lvalue, "Group")) {
+                if (r <= 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "%s= must be a multicast address, ignoring assignment: %s", lvalue, rvalue);
+                        return 0;
+                }
+        } else {
+                if (r > 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "%s= cannot be a multicast address, ignoring assignment: %s", lvalue, rvalue);
+                        return 0;
+                }
+        }
+
+        if (streq(lvalue, "Local"))
+                v->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
+        *addr = buffer;
+        *family = f;
+
+        return 0;
+}
+
+int config_parse_port_range(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        VxLan *v = userdata;
+        uint16_t low, high;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = parse_ip_port_range(rvalue, &low, &high);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", rvalue);
+                return 0;
+        }
+
+        v->port_range.low = low;
+        v->port_range.high = high;
+
+        return 0;
+}
+
+int config_parse_flow_label(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        VxLan *v = userdata;
+        unsigned f;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou(rvalue, &f);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse VXLAN flow label '%s'.", rvalue);
+                return 0;
+        }
+
+        if (f & ~VXLAN_FLOW_LABEL_MAX_MASK) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "VXLAN flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
+                return 0;
+        }
+
+        v->flow_label = f;
+
+        return 0;
+}
+
+int config_parse_vxlan_ttl(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        VxLan *v = userdata;
+        unsigned f;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (streq(rvalue, "inherit"))
+                v->inherit = true;
+        else {
+                r = safe_atou(rvalue, &f);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse VXLAN TTL '%s', ignoring assignment: %m", rvalue);
+                        return 0;
+                }
+
+                if (f > 255) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid VXLAN TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue);
+                        return 0;
+                }
+
+                v->ttl = f;
+        }
+
+        return 0;
+}
+
+static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
+        VxLan *v = VXLAN(netdev);
+
+        assert(netdev);
+        assert(v);
+        assert(filename);
+
+        if (v->vni > VXLAN_VID_MAX)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: VXLAN without valid VNI (or VXLAN Segment ID) configured. Ignoring.",
+                                                filename);
+
+        if (v->ttl > 255)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: VXLAN TTL must be <= 255. Ignoring.",
+                                                filename);
+
+        if (!v->dest_port && v->generic_protocol_extension)
+                v->dest_port = 4790;
+
+        if (in_addr_is_set(v->group_family, &v->group) && in_addr_is_set(v->remote_family, &v->remote))
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: VXLAN both 'Group=' and 'Remote=' cannot be specified. Ignoring.",
+                                                filename);
+
+        if (v->independent && v->local_type >= 0)
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "The local address cannot be '%s' when Independent= is enabled, ignoring.",
+                                              strna(netdev_local_address_type_to_string(v->local_type)));
+
+        return 0;
+}
+
+static int netdev_vxlan_is_ready_to_create(NetDev *netdev, Link *link) {
+        VxLan *v;
+
+        assert(netdev);
+
+        v = VXLAN(netdev);
+
+        assert(v);
+
+        if (v->independent)
+                return true;
+
+        return vxlan_get_local_address(v, link, NULL, NULL) >= 0;
+}
+
+static void vxlan_init(NetDev *netdev) {
+        VxLan *v;
+
+        assert(netdev);
+
+        v = VXLAN(netdev);
+
+        assert(v);
+
+        v->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
+        v->vni = VXLAN_VID_MAX + 1;
+        v->df = _NETDEV_VXLAN_DF_INVALID;
+        v->learning = true;
+        v->udpcsum = false;
+        v->udp6zerocsumtx = false;
+        v->udp6zerocsumrx = false;
+}
+
+const NetDevVTable vxlan_vtable = {
+        .object_size = sizeof(VxLan),
+        .init = vxlan_init,
+        .sections = NETDEV_COMMON_SECTIONS "VXLAN\0",
+        .fill_message_create = netdev_vxlan_fill_message_create,
+        .create_type = NETDEV_CREATE_STACKED,
+        .is_ready_to_create = netdev_vxlan_is_ready_to_create,
+        .config_verify = netdev_vxlan_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+};
diff --git a/src/network/netdev/vxlan.h b/src/network/netdev/vxlan.h
new file mode 100644
index 0000000..141ac4d
--- /dev/null
+++ b/src/network/netdev/vxlan.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct VxLan VxLan;
+
+#include <linux/if_link.h>
+
+#include "in-addr-util.h"
+#include "netdev-util.h"
+#include "netdev.h"
+
+#define VXLAN_VID_MAX (1u << 24) - 1
+#define VXLAN_FLOW_LABEL_MAX_MASK 0xFFFFFU
+
+typedef enum VxLanDF {
+        NETDEV_VXLAN_DF_NO = VXLAN_DF_UNSET,
+        NETDEV_VXLAN_DF_YES = VXLAN_DF_SET,
+        NETDEV_VXLAN_DF_INHERIT = VXLAN_DF_INHERIT,
+        _NETDEV_VXLAN_DF_MAX,
+        _NETDEV_VXLAN_DF_INVALID = -EINVAL,
+} VxLanDF;
+
+struct VxLan {
+        NetDev meta;
+
+        uint32_t vni;
+
+        int remote_family;
+        int local_family;
+        int group_family;
+
+        VxLanDF df;
+
+        NetDevLocalAddressType local_type;
+        union in_addr_union local;
+        union in_addr_union remote;
+        union in_addr_union group;
+
+        unsigned tos;
+        unsigned ttl;
+        unsigned max_fdb;
+        unsigned flow_label;
+
+        uint16_t dest_port;
+
+        usec_t fdb_ageing;
+
+        bool learning;
+        bool arp_proxy;
+        bool route_short_circuit;
+        bool l2miss;
+        bool l3miss;
+        bool udpcsum;
+        bool udp6zerocsumtx;
+        bool udp6zerocsumrx;
+        bool remote_csum_tx;
+        bool remote_csum_rx;
+        bool group_policy;
+        bool generic_protocol_extension;
+        bool inherit;
+        bool independent;
+
+        struct ifla_vxlan_port_range port_range;
+};
+
+DEFINE_NETDEV_CAST(VXLAN, VxLan);
+extern const NetDevVTable vxlan_vtable;
+
+const char *df_to_string(VxLanDF d) _const_;
+VxLanDF df_from_string(const char *d) _pure_;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_port_range);
+CONFIG_PARSER_PROTOTYPE(config_parse_flow_label);
+CONFIG_PARSER_PROTOTYPE(config_parse_df);
+CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_ttl);
diff --git a/src/network/netdev/wireguard.c b/src/network/netdev/wireguard.c
new file mode 100644
index 0000000..51e7e02
--- /dev/null
+++ b/src/network/netdev/wireguard.c
@@ -0,0 +1,1183 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+  Copyright © 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+***/
+
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <linux/if_arp.h>
+#include <linux/ipv6_route.h>
+
+#include "sd-resolve.h"
+
+#include "alloc-util.h"
+#include "dns-domain.h"
+#include "event-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "hexdecoct.h"
+#include "memory-util.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "networkd-route-util.h"
+#include "networkd-route.h"
+#include "networkd-util.h"
+#include "parse-helpers.h"
+#include "parse-util.h"
+#include "random-util.h"
+#include "resolve-private.h"
+#include "string-util.h"
+#include "strv.h"
+#include "wireguard.h"
+
+static void wireguard_resolve_endpoints(NetDev *netdev);
+static int peer_resolve_endpoint(WireguardPeer *peer);
+
+static WireguardPeer* wireguard_peer_free(WireguardPeer *peer) {
+        WireguardIPmask *mask;
+
+        if (!peer)
+                return NULL;
+
+        if (peer->wireguard) {
+                LIST_REMOVE(peers, peer->wireguard->peers, peer);
+
+                if (peer->section)
+                        hashmap_remove(peer->wireguard->peers_by_section, peer->section);
+        }
+
+        config_section_free(peer->section);
+
+        while ((mask = peer->ipmasks)) {
+                LIST_REMOVE(ipmasks, peer->ipmasks, mask);
+                free(mask);
+        }
+
+        free(peer->endpoint_host);
+        free(peer->endpoint_port);
+        free(peer->preshared_key_file);
+        explicit_bzero_safe(peer->preshared_key, WG_KEY_LEN);
+
+        sd_event_source_disable_unref(peer->resolve_retry_event_source);
+        sd_resolve_query_unref(peer->resolve_query);
+
+        return mfree(peer);
+}
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(WireguardPeer, wireguard_peer_free);
+
+static int wireguard_peer_new_static(Wireguard *w, const char *filename, unsigned section_line, WireguardPeer **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(wireguard_peer_freep) WireguardPeer *peer = NULL;
+        int r;
+
+        assert(w);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        peer = hashmap_get(w->peers_by_section, n);
+        if (peer) {
+                *ret = TAKE_PTR(peer);
+                return 0;
+        }
+
+        peer = new(WireguardPeer, 1);
+        if (!peer)
+                return -ENOMEM;
+
+        *peer = (WireguardPeer) {
+                .flags = WGPEER_F_REPLACE_ALLOWEDIPS,
+                .wireguard = w,
+                .section = TAKE_PTR(n),
+        };
+
+        LIST_PREPEND(peers, w->peers, peer);
+
+        r = hashmap_ensure_put(&w->peers_by_section, &config_section_hash_ops, peer->section, peer);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(peer);
+        return 0;
+}
+
+static int wireguard_set_ipmask_one(NetDev *netdev, sd_netlink_message *message, const WireguardIPmask *mask, uint16_t index) {
+        int r;
+
+        assert(message);
+        assert(mask);
+        assert(index > 0);
+
+        /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */
+
+        r = sd_netlink_message_open_array(message, index);
+        if (r < 0)
+                return 0;
+
+        r = sd_netlink_message_append_u16(message, WGALLOWEDIP_A_FAMILY, mask->family);
+        if (r < 0)
+                goto cancel;
+
+        r = netlink_message_append_in_addr_union(message, WGALLOWEDIP_A_IPADDR, mask->family, &mask->ip);
+        if (r < 0)
+                goto cancel;
+
+        r = sd_netlink_message_append_u8(message, WGALLOWEDIP_A_CIDR_MASK, mask->cidr);
+        if (r < 0)
+                goto cancel;
+
+        r = sd_netlink_message_close_container(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not add wireguard allowed ip: %m");
+
+        return 1;
+
+cancel:
+        r = sd_netlink_message_cancel_array(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not cancel wireguard allowed ip message attribute: %m");
+
+        return 0;
+}
+
+static int wireguard_set_peer_one(NetDev *netdev, sd_netlink_message *message, const WireguardPeer *peer, uint16_t index, WireguardIPmask **mask_start) {
+        WireguardIPmask *start, *last = NULL;
+        uint16_t j = 0;
+        int r;
+
+        assert(message);
+        assert(peer);
+        assert(index > 0);
+        assert(mask_start);
+
+        /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */
+
+        start = *mask_start ?: peer->ipmasks;
+
+        r = sd_netlink_message_open_array(message, index);
+        if (r < 0)
+                return 0;
+
+        r = sd_netlink_message_append_data(message, WGPEER_A_PUBLIC_KEY, &peer->public_key, sizeof(peer->public_key));
+        if (r < 0)
+                goto cancel;
+
+        if (!*mask_start) {
+                r = sd_netlink_message_append_data(message, WGPEER_A_PRESHARED_KEY, &peer->preshared_key, WG_KEY_LEN);
+                if (r < 0)
+                        goto cancel;
+
+                r = sd_netlink_message_append_u32(message, WGPEER_A_FLAGS, peer->flags);
+                if (r < 0)
+                        goto cancel;
+
+                r = sd_netlink_message_append_u16(message, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, peer->persistent_keepalive_interval);
+                if (r < 0)
+                        goto cancel;
+
+                if (IN_SET(peer->endpoint.sa.sa_family, AF_INET, AF_INET6)) {
+                        r = netlink_message_append_sockaddr_union(message, WGPEER_A_ENDPOINT, &peer->endpoint);
+                        if (r < 0)
+                                goto cancel;
+                }
+        }
+
+        r = sd_netlink_message_open_container(message, WGPEER_A_ALLOWEDIPS);
+        if (r < 0)
+                goto cancel;
+
+        LIST_FOREACH(ipmasks, mask, start) {
+                r = wireguard_set_ipmask_one(netdev, message, mask, ++j);
+                if (r < 0)
+                        return r;
+                if (r == 0) {
+                        last = mask;
+                        break;
+                }
+        }
+
+        r = sd_netlink_message_close_container(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not add wireguard allowed ip: %m");
+
+        r = sd_netlink_message_close_container(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not add wireguard peer: %m");
+
+        *mask_start = last; /* Start next cycle from this mask. */
+        return !last;
+
+cancel:
+        r = sd_netlink_message_cancel_array(message);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not cancel wireguard peers: %m");
+
+        return 0;
+}
+
+static int wireguard_set_interface(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
+        WireguardIPmask *mask_start = NULL;
+        WireguardPeer *peer_start;
+        bool sent_once = false;
+        uint32_t serial;
+        Wireguard *w;
+        int r;
+
+        assert(netdev);
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        for (peer_start = w->peers; peer_start || !sent_once; ) {
+                uint16_t i = 0;
+
+                message = sd_netlink_message_unref(message);
+
+                r = sd_genl_message_new(netdev->manager->genl, WG_GENL_NAME, WG_CMD_SET_DEVICE, &message);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Failed to allocate generic netlink message: %m");
+
+                r = sd_netlink_message_append_string(message, WGDEVICE_A_IFNAME, netdev->ifname);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append wireguard interface name: %m");
+
+                if (peer_start == w->peers) {
+                        r = sd_netlink_message_append_data(message, WGDEVICE_A_PRIVATE_KEY, &w->private_key, WG_KEY_LEN);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append wireguard private key: %m");
+
+                        r = sd_netlink_message_append_u16(message, WGDEVICE_A_LISTEN_PORT, w->port);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append wireguard port: %m");
+
+                        r = sd_netlink_message_append_u32(message, WGDEVICE_A_FWMARK, w->fwmark);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append wireguard fwmark: %m");
+
+                        r = sd_netlink_message_append_u32(message, WGDEVICE_A_FLAGS, w->flags);
+                        if (r < 0)
+                                return log_netdev_error_errno(netdev, r, "Could not append wireguard flags: %m");
+                }
+
+                r = sd_netlink_message_open_container(message, WGDEVICE_A_PEERS);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append wireguard peer attributes: %m");
+
+                WireguardPeer *peer_last = NULL;
+                LIST_FOREACH(peers, peer, peer_start) {
+                        r = wireguard_set_peer_one(netdev, message, peer, ++i, &mask_start);
+                        if (r < 0)
+                                return r;
+                        if (r == 0) {
+                                peer_last = peer;
+                                break;
+                        }
+                }
+                peer_start = peer_last; /* Start next cycle from this peer. */
+
+                r = sd_netlink_message_close_container(message);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not close wireguard container: %m");
+
+                r = sd_netlink_send(netdev->manager->genl, message, &serial);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not set wireguard device: %m");
+
+                sent_once = true;
+        }
+
+        return 0;
+}
+
+static int on_resolve_retry(sd_event_source *s, usec_t usec, void *userdata) {
+        WireguardPeer *peer = ASSERT_PTR(userdata);
+        NetDev *netdev;
+
+        assert(peer->wireguard);
+
+        netdev = NETDEV(peer->wireguard);
+
+        if (!netdev_is_managed(netdev))
+                return 0;
+
+        peer->resolve_query = sd_resolve_query_unref(peer->resolve_query);
+
+        (void) peer_resolve_endpoint(peer);
+        return 0;
+}
+
+static usec_t peer_next_resolve_usec(WireguardPeer *peer) {
+        usec_t usec;
+
+        /* Given the number of retries this function will return an exponential increasing amount of
+         * milliseconds to wait starting at 200ms and capped at 25 seconds. */
+
+        assert(peer);
+
+        usec = (2 << MIN(peer->n_retries, 7U)) * 100 * USEC_PER_MSEC;
+
+        return random_u64_range(usec / 10) + usec * 9 / 10;
+}
+
+static int wireguard_peer_resolve_handler(
+              sd_resolve_query *q,
+              int ret,
+              const struct addrinfo *ai,
+              void *userdata) {
+
+        WireguardPeer *peer = ASSERT_PTR(userdata);
+        NetDev *netdev;
+        int r;
+
+        assert(peer->wireguard);
+
+        netdev = NETDEV(peer->wireguard);
+
+        if (!netdev_is_managed(netdev))
+                return 0;
+
+        if (ret != 0) {
+                log_netdev_warning(netdev, "Failed to resolve host '%s:%s', ignoring: %s",
+                                   peer->endpoint_host, peer->endpoint_port, gai_strerror(ret));
+                peer->n_retries++;
+
+        } else {
+                bool found = false;
+                for (; ai; ai = ai->ai_next) {
+                        if (!IN_SET(ai->ai_family, AF_INET, AF_INET6))
+                                continue;
+
+                        if (ai->ai_addrlen != (ai->ai_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6)))
+                                continue;
+
+                        memcpy(&peer->endpoint, ai->ai_addr, ai->ai_addrlen);
+                        (void) wireguard_set_interface(netdev);
+                        peer->n_retries = 0;
+                        found = true;
+                        break;
+                }
+
+                if (!found) {
+                        log_netdev_warning(netdev, "Neither IPv4 nor IPv6 address found for peer endpoint %s:%s, ignoring the endpoint.",
+                                           peer->endpoint_host, peer->endpoint_port);
+                        peer->n_retries++;
+                }
+        }
+
+        if (peer->n_retries > 0) {
+                r = event_reset_time_relative(netdev->manager->event,
+                                              &peer->resolve_retry_event_source,
+                                              CLOCK_BOOTTIME,
+                                              peer_next_resolve_usec(peer), 0,
+                                              on_resolve_retry, peer, 0, "wireguard-resolve-retry", true);
+                if (r < 0)
+                        log_netdev_warning_errno(netdev, r, "Could not arm resolve retry handler for endpoint %s:%s, ignoring: %m",
+                                                 peer->endpoint_host, peer->endpoint_port);
+        }
+
+        wireguard_resolve_endpoints(netdev);
+        return 0;
+}
+
+static int peer_resolve_endpoint(WireguardPeer *peer) {
+        static const struct addrinfo hints = {
+                .ai_family = AF_UNSPEC,
+                .ai_socktype = SOCK_DGRAM,
+                .ai_protocol = IPPROTO_UDP
+        };
+        NetDev *netdev;
+        int r;
+
+        assert(peer);
+        assert(peer->wireguard);
+
+        netdev = NETDEV(peer->wireguard);
+
+        if (!peer->endpoint_host || !peer->endpoint_port)
+                /* Not necessary to resolve the endpoint. */
+                return 0;
+
+        if (sd_event_source_get_enabled(peer->resolve_retry_event_source, NULL) > 0)
+                /* Timer event source is enabled. The endpoint will be resolved later. */
+                return 0;
+
+        if (peer->resolve_query)
+                /* Being resolved, or already resolved. */
+                return 0;
+
+        r = sd_resolve_getaddrinfo(netdev->manager->resolve,
+                                   &peer->resolve_query,
+                                   peer->endpoint_host,
+                                   peer->endpoint_port,
+                                   &hints,
+                                   wireguard_peer_resolve_handler,
+                                   peer);
+        if (r < 0)
+                return log_netdev_full_errno(netdev, r == -ENOBUFS ? LOG_DEBUG : LOG_WARNING, r,
+                                             "Failed to create endpoint resolver for %s:%s, ignoring: %m",
+                                             peer->endpoint_host, peer->endpoint_port);
+
+        return 0;
+}
+
+static void wireguard_resolve_endpoints(NetDev *netdev) {
+        Wireguard *w;
+
+        assert(netdev);
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        LIST_FOREACH(peers, peer, w->peers)
+                if (peer_resolve_endpoint(peer) == -ENOBUFS)
+                        /* Too many requests. Let's resolve remaining endpoints later. */
+                        break;
+}
+
+static int netdev_wireguard_post_create(NetDev *netdev, Link *link) {
+        assert(netdev);
+        assert(WIREGUARD(netdev));
+
+        (void) wireguard_set_interface(netdev);
+        wireguard_resolve_endpoints(netdev);
+        return 0;
+}
+
+int config_parse_wireguard_listen_port(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint16_t *s = ASSERT_PTR(data);
+        int r;
+
+        assert(rvalue);
+
+        if (isempty(rvalue) || streq(rvalue, "auto")) {
+                *s = 0;
+                return 0;
+        }
+
+        r = parse_ip_port(rvalue, s);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Invalid port specification, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+static int wireguard_decode_key_and_warn(
+                const char *rvalue,
+                uint8_t ret[static WG_KEY_LEN],
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *lvalue) {
+
+        _cleanup_(erase_and_freep) void *key = NULL;
+        size_t len;
+        int r;
+
+        assert(rvalue);
+        assert(ret);
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                memzero(ret, WG_KEY_LEN);
+                return 0;
+        }
+
+        if (!streq(lvalue, "PublicKey"))
+                (void) warn_file_is_world_accessible(filename, NULL, unit, line);
+
+        r = unbase64mem_full(rvalue, strlen(rvalue), true, &key, &len);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to decode wireguard key provided by %s=, ignoring assignment: %m", lvalue);
+                return 0;
+        }
+        if (len != WG_KEY_LEN) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Wireguard key provided by %s= has invalid length (%zu bytes), ignoring assignment.",
+                           lvalue, len);
+                return 0;
+        }
+
+        memcpy(ret, key, WG_KEY_LEN);
+        return 0;
+}
+
+int config_parse_wireguard_private_key(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        Wireguard *w;
+
+        assert(data);
+        w = WIREGUARD(data);
+        assert(w);
+
+        return wireguard_decode_key_and_warn(rvalue, w->private_key, unit, filename, line, lvalue);
+}
+
+int config_parse_wireguard_private_key_file(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_free_ char *path = NULL;
+        Wireguard *w;
+
+        assert(data);
+        w = WIREGUARD(data);
+        assert(w);
+
+        if (isempty(rvalue)) {
+                w->private_key_file = mfree(w->private_key_file);
+                return 0;
+        }
+
+        path = strdup(rvalue);
+        if (!path)
+                return log_oom();
+
+        if (path_simplify_and_warn(path, PATH_CHECK_ABSOLUTE, unit, filename, line, lvalue) < 0)
+                return 0;
+
+        return free_and_replace(w->private_key_file, path);
+}
+
+int config_parse_wireguard_peer_key(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        Wireguard *w;
+        int r;
+
+        assert(data);
+        w = WIREGUARD(data);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        r = wireguard_decode_key_and_warn(rvalue,
+                                          streq(lvalue, "PublicKey") ? peer->public_key : peer->preshared_key,
+                                          unit, filename, line, lvalue);
+        if (r < 0)
+                return r;
+
+        TAKE_PTR(peer);
+        return 0;
+}
+
+int config_parse_wireguard_preshared_key_file(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        _cleanup_free_ char *path = NULL;
+        Wireguard *w;
+        int r;
+
+        assert(data);
+        w = WIREGUARD(data);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                peer->preshared_key_file = mfree(peer->preshared_key_file);
+                TAKE_PTR(peer);
+                return 0;
+        }
+
+        path = strdup(rvalue);
+        if (!path)
+                return log_oom();
+
+        if (path_simplify_and_warn(path, PATH_CHECK_ABSOLUTE, unit, filename, line, lvalue) < 0)
+                return 0;
+
+        free_and_replace(peer->preshared_key_file, path);
+        TAKE_PTR(peer);
+        return 0;
+}
+
+int config_parse_wireguard_allowed_ips(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        union in_addr_union addr;
+        unsigned char prefixlen;
+        int r, family;
+        Wireguard *w;
+        WireguardIPmask *ipmask;
+
+        assert(rvalue);
+        assert(data);
+
+        w = WIREGUARD(data);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+                union in_addr_union masked;
+
+                r = extract_first_word(&p, &word, "," WHITESPACE, 0);
+                if (r == 0)
+                        break;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to split allowed ips \"%s\" option: %m", rvalue);
+                        break;
+                }
+
+                r = in_addr_prefix_from_string_auto(word, &family, &addr, &prefixlen);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Network address is invalid, ignoring assignment: %s", word);
+                        continue;
+                }
+
+                masked = addr;
+                assert_se(in_addr_mask(family, &masked, prefixlen) >= 0);
+                if (!in_addr_equal(family, &masked, &addr))
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Specified address '%s' is not properly masked, assuming '%s'.",
+                                   word,
+                                   IN_ADDR_PREFIX_TO_STRING(family, &masked, prefixlen));
+
+                ipmask = new(WireguardIPmask, 1);
+                if (!ipmask)
+                        return log_oom();
+
+                *ipmask = (WireguardIPmask) {
+                        .family = family,
+                        .ip = masked,
+                        .cidr = prefixlen,
+                };
+
+                LIST_PREPEND(ipmasks, peer->ipmasks, ipmask);
+        }
+
+        TAKE_PTR(peer);
+        return 0;
+}
+
+int config_parse_wireguard_endpoint(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        _cleanup_free_ char *host = NULL;
+        union in_addr_union addr;
+        const char *p;
+        uint16_t port;
+        Wireguard *w;
+        int family, r;
+
+        assert(filename);
+        assert(rvalue);
+        assert(userdata);
+
+        w = WIREGUARD(userdata);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        r = in_addr_port_ifindex_name_from_string_auto(rvalue, &family, &addr, &port, NULL, NULL);
+        if (r >= 0) {
+                if (family == AF_INET)
+                        peer->endpoint.in = (struct sockaddr_in) {
+                                .sin_family = AF_INET,
+                                .sin_addr = addr.in,
+                                .sin_port = htobe16(port),
+                        };
+                else if (family == AF_INET6)
+                        peer->endpoint.in6 = (struct sockaddr_in6) {
+                                .sin6_family = AF_INET6,
+                                .sin6_addr = addr.in6,
+                                .sin6_port = htobe16(port),
+                        };
+                else
+                        assert_not_reached();
+
+                peer->endpoint_host = mfree(peer->endpoint_host);
+                peer->endpoint_port = mfree(peer->endpoint_port);
+
+                TAKE_PTR(peer);
+                return 0;
+        }
+
+        p = strrchr(rvalue, ':');
+        if (!p) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Unable to find port of endpoint, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        host = strndup(rvalue, p - rvalue);
+        if (!host)
+                return log_oom();
+
+        if (!dns_name_is_valid(host)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Invalid domain name of endpoint, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        p++;
+        r = parse_ip_port(p, &port);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Invalid port of endpoint, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        peer->endpoint = (union sockaddr_union) {};
+
+        free_and_replace(peer->endpoint_host, host);
+
+        r = free_and_strdup(&peer->endpoint_port, p);
+        if (r < 0)
+                return log_oom();
+
+        TAKE_PTR(peer); /* The peer may already have been in the hash map, that is fine too. */
+        return 0;
+}
+
+int config_parse_wireguard_keepalive(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        uint16_t keepalive = 0;
+        Wireguard *w;
+        int r;
+
+        assert(rvalue);
+        assert(data);
+
+        w = WIREGUARD(data);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        if (streq(rvalue, "off"))
+                keepalive = 0;
+        else {
+                r = safe_atou16(rvalue, &keepalive);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to parse \"%s\" as keepalive interval (range 0–65535), ignoring assignment: %m",
+                                   rvalue);
+                        return 0;
+                }
+        }
+
+        peer->persistent_keepalive_interval = keepalive;
+
+        TAKE_PTR(peer);
+        return 0;
+}
+
+int config_parse_wireguard_route_table(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        NetDev *netdev = ASSERT_PTR(userdata);
+        uint32_t *table = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue) || parse_boolean(rvalue) == 0) {
+                *table = 0; /* Disabled. */
+                return 0;
+        }
+
+        r = manager_get_route_table_from_string(netdev->manager, rvalue, table);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse %s=, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_wireguard_peer_route_table(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        NetDev *netdev = ASSERT_PTR(userdata);
+        Wireguard *w;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(netdev->manager);
+
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                peer->route_table_set = false; /* Use the table specified in [WireGuard] section. */
+                TAKE_PTR(peer);
+                return 0;
+        }
+
+        if (parse_boolean(rvalue) == 0) {
+                peer->route_table = 0; /* Disabled. */
+                peer->route_table_set = true;
+                TAKE_PTR(peer);
+                return 0;
+        }
+
+        r = manager_get_route_table_from_string(netdev->manager, rvalue, &peer->route_table);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse %s=, ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        peer->route_table_set = true;
+        TAKE_PTR(peer);
+        return 0;
+}
+
+int config_parse_wireguard_route_priority(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        uint32_t *priority = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *priority = 0;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, priority);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_wireguard_peer_route_priority(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(wireguard_peer_free_or_set_invalidp) WireguardPeer *peer = NULL;
+        Wireguard *w;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(userdata);
+
+        w = WIREGUARD(userdata);
+        assert(w);
+
+        r = wireguard_peer_new_static(w, filename, section_line, &peer);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                peer->route_priority_set = false; /* Use the priority specified in [WireGuard] section. */
+                TAKE_PTR(peer);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &peer->route_priority);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        peer->route_priority_set = true;
+        TAKE_PTR(peer);
+        return 0;
+}
+
+static void wireguard_init(NetDev *netdev) {
+        Wireguard *w;
+
+        assert(netdev);
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        w->flags = WGDEVICE_F_REPLACE_PEERS;
+}
+
+static void wireguard_done(NetDev *netdev) {
+        Wireguard *w;
+
+        assert(netdev);
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        explicit_bzero_safe(w->private_key, WG_KEY_LEN);
+        free(w->private_key_file);
+
+        hashmap_free_with_destructor(w->peers_by_section, wireguard_peer_free);
+
+        set_free(w->routes);
+}
+
+static int wireguard_read_key_file(const char *filename, uint8_t dest[static WG_KEY_LEN]) {
+        _cleanup_(erase_and_freep) char *key = NULL;
+        size_t key_len;
+        int r;
+
+        if (!filename)
+                return 0;
+
+        assert(dest);
+
+        r = read_full_file_full(
+                        AT_FDCWD, filename, UINT64_MAX, SIZE_MAX,
+                        READ_FULL_FILE_SECURE | READ_FULL_FILE_UNBASE64 | READ_FULL_FILE_WARN_WORLD_READABLE | READ_FULL_FILE_CONNECT_SOCKET,
+                        NULL, &key, &key_len);
+        if (r < 0)
+                return r;
+
+        if (key_len != WG_KEY_LEN)
+                return -EINVAL;
+
+        memcpy(dest, key, WG_KEY_LEN);
+        return 0;
+}
+
+static int wireguard_peer_verify(WireguardPeer *peer) {
+        NetDev *netdev = NETDEV(peer->wireguard);
+        int r;
+
+        if (section_is_invalid(peer->section))
+                return -EINVAL;
+
+        if (eqzero(peer->public_key))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: WireGuardPeer section without PublicKey= configured. "
+                                              "Ignoring [WireGuardPeer] section from line %u.",
+                                              peer->section->filename, peer->section->line);
+
+        r = wireguard_read_key_file(peer->preshared_key_file, peer->preshared_key);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r,
+                                              "%s: Failed to read preshared key from '%s'. "
+                                              "Ignoring [WireGuardPeer] section from line %u.",
+                                              peer->section->filename, peer->preshared_key_file,
+                                              peer->section->line);
+
+        return 0;
+}
+
+static int wireguard_verify(NetDev *netdev, const char *filename) {
+        Wireguard *w;
+        int r;
+
+        assert(netdev);
+        w = WIREGUARD(netdev);
+        assert(w);
+
+        r = wireguard_read_key_file(w->private_key_file, w->private_key);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r,
+                                              "Failed to read private key from %s. Ignoring network device.",
+                                              w->private_key_file);
+
+        if (eqzero(w->private_key))
+                return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                              "%s: Missing PrivateKey= or PrivateKeyFile=, "
+                                              "Ignoring network device.", filename);
+
+        LIST_FOREACH(peers, peer, w->peers) {
+                if (wireguard_peer_verify(peer) < 0) {
+                        wireguard_peer_free(peer);
+                        continue;
+                }
+
+                if ((peer->route_table_set ? peer->route_table : w->route_table) == 0)
+                        continue;
+
+                LIST_FOREACH(ipmasks, ipmask, peer->ipmasks) {
+                        _cleanup_(route_freep) Route *route = NULL;
+
+                        r = route_new(&route);
+                        if (r < 0)
+                                return log_oom();
+
+                        route->family = ipmask->family;
+                        route->dst = ipmask->ip;
+                        route->dst_prefixlen = ipmask->cidr;
+                        route->scope = RT_SCOPE_UNIVERSE;
+                        route->protocol = RTPROT_STATIC;
+                        route->table = peer->route_table_set ? peer->route_table : w->route_table;
+                        route->priority = peer->route_priority_set ? peer->route_priority : w->route_priority;
+                        if (route->priority == 0 && route->family == AF_INET6)
+                                route->priority = IP6_RT_PRIO_USER;
+                        route->source = NETWORK_CONFIG_SOURCE_STATIC;
+
+                        r = set_ensure_consume(&w->routes, &route_hash_ops, TAKE_PTR(route));
+                        if (r < 0)
+                                return log_oom();
+                }
+        }
+
+        return 0;
+}
+
+const NetDevVTable wireguard_vtable = {
+        .object_size = sizeof(Wireguard),
+        .sections = NETDEV_COMMON_SECTIONS "WireGuard\0WireGuardPeer\0",
+        .post_create = netdev_wireguard_post_create,
+        .init = wireguard_init,
+        .done = wireguard_done,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = wireguard_verify,
+        .iftype = ARPHRD_NONE,
+};
diff --git a/src/network/netdev/wireguard.h b/src/network/netdev/wireguard.h
new file mode 100644
index 0000000..09dca88
--- /dev/null
+++ b/src/network/netdev/wireguard.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#pragma once
+
+typedef struct Wireguard Wireguard;
+
+#include <netinet/in.h>
+#include <linux/wireguard.h>
+
+#include "sd-event.h"
+#include "sd-resolve.h"
+
+#include "in-addr-util.h"
+#include "netdev.h"
+#include "socket-util.h"
+
+typedef struct WireguardIPmask {
+        uint16_t family;
+        union in_addr_union ip;
+        uint8_t cidr;
+
+        LIST_FIELDS(struct WireguardIPmask, ipmasks);
+} WireguardIPmask;
+
+typedef struct WireguardPeer {
+        Wireguard *wireguard;
+        ConfigSection *section;
+
+        uint8_t public_key[WG_KEY_LEN];
+        uint8_t preshared_key[WG_KEY_LEN];
+        char *preshared_key_file;
+        uint32_t flags;
+        uint16_t persistent_keepalive_interval;
+
+        union sockaddr_union endpoint;
+        char *endpoint_host;
+        char *endpoint_port;
+
+        unsigned n_retries;
+        sd_event_source *resolve_retry_event_source;
+        sd_resolve_query *resolve_query;
+
+        uint32_t route_table;
+        uint32_t route_priority;
+        bool route_table_set;
+        bool route_priority_set;
+
+        LIST_HEAD(WireguardIPmask, ipmasks);
+        LIST_FIELDS(struct WireguardPeer, peers);
+} WireguardPeer;
+
+struct Wireguard {
+        NetDev meta;
+        unsigned last_peer_section;
+
+        uint32_t flags;
+        uint8_t private_key[WG_KEY_LEN];
+        char *private_key_file;
+        uint16_t port;
+        uint32_t fwmark;
+
+        Hashmap *peers_by_section;
+        LIST_HEAD(WireguardPeer, peers);
+
+        Set *routes;
+        uint32_t route_table;
+        uint32_t route_priority;
+};
+
+DEFINE_NETDEV_CAST(WIREGUARD, Wireguard);
+extern const NetDevVTable wireguard_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_allowed_ips);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_endpoint);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_listen_port);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_peer_key);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_private_key);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_private_key_file);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_preshared_key_file);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_keepalive);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_route_table);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_peer_route_table);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_route_priority);
+CONFIG_PARSER_PROTOTYPE(config_parse_wireguard_peer_route_priority);
diff --git a/src/network/netdev/wlan.c b/src/network/netdev/wlan.c
new file mode 100644
index 0000000..816e106
--- /dev/null
+++ b/src/network/netdev/wlan.c
@@ -0,0 +1,258 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <net/if_arp.h>
+
+#include "sd-netlink.h"
+
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "networkd-wiphy.h"
+#include "parse-util.h"
+#include "wifi-util.h"
+#include "wlan.h"
+
+static void wlan_done(NetDev *netdev) {
+        WLan *w;
+
+        assert(netdev);
+
+        w = WLAN(netdev);
+
+        assert(w);
+
+        w->wiphy_name = mfree(w->wiphy_name);
+}
+
+static void wlan_init(NetDev *netdev) {
+        WLan *w;
+
+        assert(netdev);
+
+        w = WLAN(netdev);
+
+        assert(w);
+
+        w->wiphy_index = UINT32_MAX;
+        w->wds = -1;
+}
+
+static int wlan_get_wiphy(NetDev *netdev, Wiphy **ret) {
+        WLan *w;
+
+        assert(netdev);
+
+        w = WLAN(netdev);
+
+        assert(w);
+
+        if (w->wiphy_name)
+                return wiphy_get_by_name(netdev->manager, w->wiphy_name, ret);
+
+        return wiphy_get_by_index(netdev->manager, w->wiphy_index, ret);
+}
+
+static int wlan_is_ready_to_create(NetDev *netdev, Link *link) {
+        return wlan_get_wiphy(netdev, NULL) >= 0;
+}
+
+static int wlan_fill_message(NetDev *netdev, sd_netlink_message *m) {
+        Wiphy *wiphy;
+        WLan *w;
+        int r;
+
+        assert(netdev);
+        assert(m);
+
+        w = WLAN(netdev);
+
+        assert(w);
+
+        r = wlan_get_wiphy(netdev, &wiphy);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, NL80211_ATTR_WIPHY, wiphy->index);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_string(m, NL80211_ATTR_IFNAME, netdev->ifname);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(m, NL80211_ATTR_IFTYPE, w->iftype);
+        if (r < 0)
+                return r;
+
+        if (!hw_addr_is_null(&netdev->hw_addr) && netdev->hw_addr.length == ETH_ALEN) {
+                r = sd_netlink_message_append_ether_addr(m, NL80211_ATTR_MAC, &netdev->hw_addr.ether);
+                if (r < 0)
+                        return r;
+        }
+
+        if (w->wds >= 0) {
+                r = sd_netlink_message_append_u8(m, NL80211_ATTR_4ADDR, w->wds);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int wlan_create_handler(sd_netlink *genl, sd_netlink_message *m, NetDev *netdev) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->state != _NETDEV_STATE_INVALID);
+
+        r = sd_netlink_message_get_errno(m);
+        if (IN_SET(r, -EEXIST, -ENFILE))
+                /* Unlike the other netdevs, the kernel may return -ENFILE. See dev_alloc_name(). */
+                log_netdev_info(netdev, "WLAN interface exists, using existing without changing its parameters.");
+        else if (r < 0) {
+                log_netdev_warning_errno(netdev, r, "WLAN interface could not be created: %m");
+                netdev_enter_failed(netdev);
+
+                return 1;
+        }
+
+        log_netdev_debug(netdev, "WLAN interface is created.");
+        return 1;
+}
+
+static int wlan_create(NetDev *netdev) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+        int r;
+
+        assert(netdev);
+        assert(netdev->manager);
+        assert(netdev->manager->genl);
+
+        r = sd_genl_message_new(netdev->manager->genl, NL80211_GENL_NAME, NL80211_CMD_NEW_INTERFACE, &m);
+        if (r < 0)
+                return log_netdev_warning_errno(netdev, r, "Failed to allocate netlink message: %m");
+
+        r = wlan_fill_message(netdev, m);
+        if (r < 0)
+                return log_netdev_warning_errno(netdev, r, "Failed to fill netlink message: %m");
+
+        r = netlink_call_async(netdev->manager->genl, NULL, m, wlan_create_handler,
+                               netdev_destroy_callback, netdev);
+        if (r < 0)
+                return log_netdev_warning_errno(netdev, r, "Failed to send netlink message: %m");
+
+        netdev_ref(netdev);
+        return 0;
+}
+
+static int wlan_verify(NetDev *netdev, const char *filename) {
+        WLan *w;
+
+        assert(netdev);
+        assert(filename);
+
+        w = WLAN(netdev);
+
+        assert(w);
+
+        if (w->iftype == NL80211_IFTYPE_UNSPECIFIED)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: WLAN interface type is not specified, ignoring.",
+                                                filename);
+
+        if (w->wiphy_index == UINT32_MAX && isempty(w->wiphy_name))
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: physical WLAN device is not specified, ignoring.",
+                                                filename);
+
+        return 0;
+}
+
+int config_parse_wiphy(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        WLan *w = ASSERT_PTR(userdata);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                w->wiphy_name = mfree(w->wiphy_name);
+                w->wiphy_index = UINT32_MAX;
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &w->wiphy_index);
+        if (r >= 0) {
+                w->wiphy_name = mfree(w->wiphy_name);
+                return 0;
+        }
+
+        r = free_and_strdup_warn(&w->wiphy_name, rvalue);
+        if (r < 0)
+                return r;
+
+        w->wiphy_index = UINT32_MAX;
+        return 0;
+}
+
+int config_parse_wlan_iftype(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        enum nl80211_iftype t, *iftype = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *iftype = NL80211_IFTYPE_UNSPECIFIED;
+                return 0;
+        }
+
+        t = nl80211_iftype_from_string(rvalue);
+        /* We reuse the kernel provided enum which does not contain negative value. So, the cast
+         * below is mandatory. Otherwise, the check below always passes. */
+        if ((int) t < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, t,
+                           "Failed to parse wlan interface type, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        *iftype = t;
+        return 0;
+}
+
+const NetDevVTable wlan_vtable = {
+        .object_size = sizeof(WLan),
+        .init = wlan_init,
+        .done = wlan_done,
+        .sections = NETDEV_COMMON_SECTIONS "WLAN\0",
+        .is_ready_to_create = wlan_is_ready_to_create,
+        .create = wlan_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = wlan_verify,
+        .iftype = ARPHRD_ETHER,
+        .generate_mac = true,
+        .skip_netdev_kind_check = true,
+};
diff --git a/src/network/netdev/wlan.h b/src/network/netdev/wlan.h
new file mode 100644
index 0000000..bcc2dbc
--- /dev/null
+++ b/src/network/netdev/wlan.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <linux/nl80211.h>
+
+#include "conf-parser.h"
+#include "netdev.h"
+
+typedef struct WLan {
+        NetDev meta;
+
+        char *wiphy_name;
+        uint32_t wiphy_index;
+        enum nl80211_iftype iftype;
+        int wds; /* tristate */
+} WLan;
+
+DEFINE_NETDEV_CAST(WLAN, WLan);
+extern const NetDevVTable wlan_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_wiphy);
+CONFIG_PARSER_PROTOTYPE(config_parse_wlan_iftype);
diff --git a/src/network/netdev/xfrm.c b/src/network/netdev/xfrm.c
new file mode 100644
index 0000000..a961d8f
--- /dev/null
+++ b/src/network/netdev/xfrm.c
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/if_arp.h>
+
+#include "missing_network.h"
+#include "xfrm.h"
+
+static int xfrm_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *message) {
+        Xfrm *x;
+        int r;
+
+        assert(netdev);
+        assert(message);
+
+        x = XFRM(netdev);
+
+        assert(x);
+        assert(link || x->independent);
+
+        r = sd_netlink_message_append_u32(message, IFLA_XFRM_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
+        if (r < 0)
+                return r;
+
+        r = sd_netlink_message_append_u32(message, IFLA_XFRM_IF_ID, x->if_id);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int xfrm_verify(NetDev *netdev, const char *filename) {
+        Xfrm *x;
+
+        assert(netdev);
+        assert(filename);
+
+        x = XFRM(netdev);
+
+        assert(x);
+
+        if (x->if_id == 0)
+                return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+                                                "%s: Xfrm interface ID cannot be zero.", filename);
+
+        return 0;
+}
+
+const NetDevVTable xfrm_vtable = {
+        .object_size = sizeof(Xfrm),
+        .sections = NETDEV_COMMON_SECTIONS "Xfrm\0",
+        .fill_message_create = xfrm_fill_message_create,
+        .config_verify = xfrm_verify,
+        .create_type = NETDEV_CREATE_STACKED,
+        .iftype = ARPHRD_NONE,
+};
diff --git a/src/network/netdev/xfrm.h b/src/network/netdev/xfrm.h
new file mode 100644
index 0000000..f56c4f2
--- /dev/null
+++ b/src/network/netdev/xfrm.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include "netdev.h"
+
+typedef struct Xfrm {
+        NetDev meta;
+
+        uint32_t if_id;
+        bool independent;
+} Xfrm;
+
+DEFINE_NETDEV_CAST(XFRM, Xfrm);
+extern const NetDevVTable xfrm_vtable;