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-rw-r--r--src/network/netdev/bridge.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/src/network/netdev/bridge.c b/src/network/netdev/bridge.c
new file mode 100644
index 0000000..3e394ed
--- /dev/null
+++ b/src/network/netdev/bridge.c
@@ -0,0 +1,253 @@
+/* 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 = BRIDGE(netdev);
+ int r;
+
+ 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) {
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ Bridge *b = ASSERT_PTR(userdata);
+
+ if (isempty(rvalue)) {
+ b->igmp_version = 0; /* 0 means unset. */
+ return 0;
+ }
+
+ return config_parse_uint8_bounded(
+ unit, filename, line, section, section_line, lvalue, rvalue,
+ 2, 3, true,
+ &b->igmp_version);
+}
+
+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) {
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ uint16_t *prio = ASSERT_PTR(data);
+
+ return config_parse_uint16_bounded(
+ unit, filename, line, section, section_line, lvalue, rvalue,
+ 0, LINK_BRIDGE_PORT_PRIORITY_MAX, true,
+ prio);
+}
+
+static void bridge_init(NetDev *netdev) {
+ Bridge *b = BRIDGE(netdev);
+
+ 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,
+};