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Diffstat (limited to 'src/network/netdev/veth.c')
-rw-r--r--src/network/netdev/veth.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/src/network/netdev/veth.c b/src/network/netdev/veth.c
new file mode 100644
index 0000000..3ad95ad
--- /dev/null
+++ b/src/network/netdev/veth.c
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <linux/veth.h>
+#include <net/if.h>
+
+#include "sd-netlink.h"
+
+#include "netdev/veth.h"
+
+static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+ 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 log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
+
+ if (v->ifname_peer) {
+ r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add netlink interface name: %m");
+ }
+
+ if (v->mac_peer) {
+ r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, v->mac_peer);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS 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");
+
+ return r;
+}
+
+static int netdev_veth_verify(NetDev *netdev, const char *filename) {
+ Veth *v;
+ int r;
+
+ assert(netdev);
+ assert(filename);
+
+ v = VETH(netdev);
+
+ assert(v);
+
+ if (!v->ifname_peer) {
+ log_warning("Veth NetDev without peer name configured in %s. Ignoring",
+ filename);
+ return -EINVAL;
+ }
+
+ if (!v->mac_peer) {
+ r = netdev_get_mac(v->ifname_peer, &v->mac_peer);
+ if (r < 0) {
+ log_warning("Failed to generate predictable MAC address for %s. Ignoring",
+ v->ifname_peer);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static void veth_done(NetDev *n) {
+ Veth *v;
+
+ assert(n);
+
+ v = VETH(n);
+
+ assert(v);
+
+ free(v->ifname_peer);
+ free(v->mac_peer);
+}
+
+const NetDevVTable veth_vtable = {
+ .object_size = sizeof(Veth),
+ .sections = "Match\0NetDev\0Peer\0",
+ .done = veth_done,
+ .fill_message_create = netdev_veth_fill_message_create,
+ .create_type = NETDEV_CREATE_INDEPENDENT,
+ .config_verify = netdev_veth_verify,
+};