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-rw-r--r--src/network/netdev/veth.c98
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,
+};