1 files changed, 98 insertions, 0 deletions
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,
+};