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-rw-r--r--src/network/netdev/bareudp.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/network/netdev/bareudp.c b/src/network/netdev/bareudp.c
new file mode 100644
index 0000000..22c0e49
--- /dev/null
+++ b/src/network/netdev/bareudp.c
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#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=");
+
+/* callback for bareudp netdev's created without a backing Link */
+static int bare_udp_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, "BareUDP netdev exists, using existing without changing its parameters.");
+ else if (r < 0) {
+ log_netdev_warning_errno(netdev, r, "BareUDP netdev could not be created: %m");
+ netdev_drop(netdev);
+
+ return 1;
+ }
+
+ log_netdev_debug(netdev, "BareUDP created.");
+
+ return 1;
+}
+
+static int netdev_bare_udp_create(NetDev *netdev) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+ BareUDP *u;
+ int r;
+
+ assert(netdev);
+
+ u = BAREUDP(netdev);
+
+ assert(u);
+
+ r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
+
+ r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
+
+ r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+ r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+ r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_ETHERTYPE, htobe16(u->iftype));
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_BAREUDP_ETHERTYPE attribute: %m");
+
+ r = sd_netlink_message_append_u16(m, IFLA_BAREUDP_PORT, htobe16(u->dest_port));
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_BAREUDP_PORT attribute: %m");
+
+ r = sd_netlink_message_close_container(m);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+ r = sd_netlink_message_close_container(m);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
+
+ r = netlink_call_async(netdev->manager->rtnl, NULL, m, bare_udp_netdev_create_handler,
+ netdev_destroy_callback, netdev);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
+
+ netdev_ref(netdev);
+ netdev->state = NETDEV_STATE_CREATING;
+
+ log_netdev_debug(netdev, "Creating");
+
+ return r;
+}
+
+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,
+ .create = netdev_bare_udp_create,
+ .create_type = NETDEV_CREATE_INDEPENDENT,
+};