diff options
Diffstat (limited to 'pkg/tcpip/stack/nic.go')
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index 5d037a27e..4a34805b5 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -20,7 +20,6 @@ import ( "reflect" "sync/atomic" - "gvisor.dev/gvisor/pkg/sleep" "gvisor.dev/gvisor/pkg/sync" "gvisor.dev/gvisor/pkg/tcpip" "gvisor.dev/gvisor/pkg/tcpip/header" @@ -295,15 +294,17 @@ func (n *NIC) WritePacket(r *Route, gso *GSO, protocol tcpip.NetworkProtocolNumb // the same unresolved IP address, and transmit the saved // packet when the address has been resolved. // - // RFC 4861 section 5.2 (for IPv6): - // Once the IP address of the next-hop node is known, the sender - // examines the Neighbor Cache for link-layer information about that - // neighbor. If no entry exists, the sender creates one, sets its state - // to INCOMPLETE, initiates Address Resolution, and then queues the data - // packet pending completion of address resolution. + // RFC 4861 section 7.2.2 (for IPv6): + // While waiting for address resolution to complete, the sender MUST, for + // each neighbor, retain a small queue of packets waiting for address + // resolution to complete. The queue MUST hold at least one packet, and MAY + // contain more. However, the number of queued packets per neighbor SHOULD + // be limited to some small value. When a queue overflows, the new arrival + // SHOULD replace the oldest entry. Once address resolution completes, the + // node transmits any queued packets. if ch, err := r.Resolve(nil); err != nil { if err == tcpip.ErrWouldBlock { - r := r.Clone() + r.Acquire() n.stack.linkResQueue.enqueue(ch, r, protocol, pkt) return nil } @@ -316,7 +317,9 @@ func (n *NIC) WritePacket(r *Route, gso *GSO, protocol tcpip.NetworkProtocolNumb // WritePacketToRemote implements NetworkInterface. func (n *NIC) WritePacketToRemote(remoteLinkAddr tcpip.LinkAddress, gso *GSO, protocol tcpip.NetworkProtocolNumber, pkt *PacketBuffer) *tcpip.Error { r := Route{ - NetProto: protocol, + routeInfo: routeInfo{ + NetProto: protocol, + }, } r.ResolveWith(remoteLinkAddr) return n.writePacket(&r, gso, protocol, pkt) @@ -545,14 +548,6 @@ func (n *NIC) neighbors() ([]NeighborEntry, *tcpip.Error) { return n.neigh.entries(), nil } -func (n *NIC) removeWaker(addr tcpip.Address, w *sleep.Waker) { - if n.neigh == nil { - return - } - - n.neigh.removeWaker(addr, w) -} - func (n *NIC) addStaticNeighbor(addr tcpip.Address, linkAddress tcpip.LinkAddress) *tcpip.Error { if n.neigh == nil { return tcpip.ErrNotSupported |