Fix TCP accept and accept packet from null mac address

src/smolnetd/link/ethernet.rs

@@ -31,6 +31,8 @@ enum ArpState {
 
 type PacketBuffer = smoltcp::storage::PacketBuffer<'static, IpAddress>;
 
+const EMPTY_MAC: EthernetAddress = EthernetAddress([0;6]);
+
 pub struct EthernetLink {
     name: Rc<str>,
     neighbor_cache: BTreeMap<IpAddress, Neighbor>,
@@ -333,11 +335,14 @@ impl LinkDevice for EthernetLink {
                 continue;
             };
 
-            if !repr.dst_addr.is_broadcast() && repr.dst_addr != self.hardware_address {
+            // We let EMPTY_MAC pass because somehow this is the mac used when net=redir is used
+            if !repr.dst_addr.is_broadcast() && repr.dst_addr != EMPTY_MAC && repr.dst_addr != self.hardware_address {
                 // Drop packets which are not for us
                 continue;
             }
 
+            error!("Incomming packet {}, {}", repr.dst_addr, repr.ethertype);
+
             match repr.ethertype {
                 EthernetProtocol::Ipv4 => {
                     self.input_buffer = input_buffer;

src/smolnetd/scheme/tcp.rs

@@ -226,10 +226,7 @@ impl<'a> SchemeSocket for TcpSocket<'a> {
                     {
                         let tcp_socket = socket_set.get_mut::<TcpSocket>(new_socket_handle);
                         tcp_socket
-                            .listen(
-                                local_endpoint
-                                    .expect("Socket was active so local endpoint must be set"),
-                            )
+                            .listen(listen_enpoint)
                             .expect("Can't listen on local endpoint");
                     }
                     // We got a new connection to the socket so acquire the port