diff options
Diffstat (limited to 'pkg/tcpip/stack/nic.go')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index a867f8c00..ab6798aa6 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -780,7 +780,7 @@ func (n *NIC) DeliverNetworkPacket(linkEP LinkEndpoint, remote, local tcpip.Link // packet and forward it to the NIC. // // TODO: Should we be forwarding the packet even if promiscuous? - if n.stack.Forwarding() { + if n.stack.Forwarding(protocol) { r, err := n.stack.FindRoute(0, "", dst, protocol, false /* multicastLoop */) if err != nil { n.stack.stats.IP.InvalidAddressesReceived.Increment() @@ -805,9 +805,12 @@ func (n *NIC) DeliverNetworkPacket(linkEP LinkEndpoint, remote, local tcpip.Link } else { // n doesn't have a destination endpoint. // Send the packet out of n. - hdr := buffer.NewPrependableFromView(vv.First()) + // If we want to send the packet to a link-layer, + // we have to reserve space for an Ethernet header. + hdr := buffer.NewPrependableFromView(vv.First(), int(n.linkEP.MaxHeaderLength())) vv.RemoveFirst() + // TODO(gvisor.dev/issue/1085): According to the RFC, we must decrease the TTL field for ipv4/ipv6. // TODO(b/128629022): use route.WritePacket. if err := n.linkEP.WritePacket(&r, nil /* gso */, hdr, vv, protocol); err != nil { r.Stats().IP.OutgoingPacketErrors.Increment() |