network: bridge: add support for host_interface_name option

Fixes containers/netavark#24523

Signed-off-by: Michael Zimmermann <[email protected]>

src/network/bridge.rs

@@ -38,6 +38,8 @@ const NO_BRIDGE_NAME_ERROR: &str = "no bridge interface name given";
 struct InternalData {
     /// interface name of the veth pair inside the container netns
     container_interface_name: String,
+    /// interace name of the veth pair in the host netns
+    host_interface_name: String,
     /// interface name of the bridge for on the host
     bridge_interface_name: String,
     /// static mac address
@@ -95,6 +97,13 @@ impl driver::NetworkDriver for Bridge<'_> {
         self.data = Some(InternalData {
             bridge_interface_name: bridge_name,
             container_interface_name: self.info.per_network_opts.interface_name.clone(),
+            host_interface_name: self
+                .info
+                .per_network_opts
+                .options
+                .get("host_interface_name")
+                .cloned()
+                .unwrap_or_else(|| "".to_string()),
             mac_address: static_mac,
             ipam,
             mtu,
@@ -647,7 +656,8 @@ fn create_veth_pair<'fd>(
     let mut peer = LinkMessage::default();
     netlink::parse_create_link_options(&mut peer, peer_opts);
 
-    let mut host_veth = netlink::CreateLinkOptions::new(String::from(""), InfoKind::Veth);
+    let mut host_veth =
+        netlink::CreateLinkOptions::new(data.host_interface_name.clone(), InfoKind::Veth);
     host_veth.mtu = data.mtu;
     host_veth.primary_index = primary_index;
     host_veth.info_data = Some(InfoData::Veth(InfoVeth::Peer(peer)));