diff options
Diffstat (limited to 'pkg/tcpip/transport/packet')
| -rw-r--r-- | pkg/tcpip/transport/packet/endpoint.go | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/pkg/tcpip/transport/packet/endpoint.go b/pkg/tcpip/transport/packet/endpoint.go index 7b2083a09..8f167391f 100644 --- a/pkg/tcpip/transport/packet/endpoint.go +++ b/pkg/tcpip/transport/packet/endpoint.go @@ -441,6 +441,7 @@ func (ep *endpoint) HandlePacket(nicID tcpip.NICID, localAddr tcpip.LinkAddress, Addr: tcpip.Address(hdr.SourceAddress()), } packet.packetInfo.Protocol = netProto + packet.packetInfo.PktType = pkt.PktType } else { // Guess the would-be ethernet header. packet.senderAddr = tcpip.FullAddress{ @@ -448,30 +449,53 @@ func (ep *endpoint) HandlePacket(nicID tcpip.NICID, localAddr tcpip.LinkAddress, Addr: tcpip.Address(localAddr), } packet.packetInfo.Protocol = netProto + packet.packetInfo.PktType = pkt.PktType } if ep.cooked { // Cooked packets can simply be queued. - packet.data = pkt.Data + switch pkt.PktType { + case tcpip.PacketHost: + packet.data = pkt.Data + case tcpip.PacketOutgoing: + // Strip Link Header from the Header. + pkt.Header = buffer.NewPrependableFromView(pkt.Header.View()[len(pkt.LinkHeader):]) + combinedVV := pkt.Header.View().ToVectorisedView() + combinedVV.Append(pkt.Data) + packet.data = combinedVV + default: + panic(fmt.Sprintf("unexpected PktType in pkt: %+v", pkt)) + } + } else { // Raw packets need their ethernet headers prepended before // queueing. var linkHeader buffer.View - if len(pkt.LinkHeader) == 0 { - // We weren't provided with an actual ethernet header, - // so fake one. - ethFields := header.EthernetFields{ - SrcAddr: tcpip.LinkAddress([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), - DstAddr: localAddr, - Type: netProto, + var combinedVV buffer.VectorisedView + if pkt.PktType != tcpip.PacketOutgoing { + if len(pkt.LinkHeader) == 0 { + // We weren't provided with an actual ethernet header, + // so fake one. + ethFields := header.EthernetFields{ + SrcAddr: tcpip.LinkAddress([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), + DstAddr: localAddr, + Type: netProto, + } + fakeHeader := make(header.Ethernet, header.EthernetMinimumSize) + fakeHeader.Encode(ðFields) + linkHeader = buffer.View(fakeHeader) + } else { + linkHeader = append(buffer.View(nil), pkt.LinkHeader...) } - fakeHeader := make(header.Ethernet, header.EthernetMinimumSize) - fakeHeader.Encode(ðFields) - linkHeader = buffer.View(fakeHeader) - } else { - linkHeader = append(buffer.View(nil), pkt.LinkHeader...) + combinedVV = linkHeader.ToVectorisedView() + } + if pkt.PktType == tcpip.PacketOutgoing { + // For outgoing packets the Link, Network and Transport + // headers are in the pkt.Header fields normally unless + // a Raw socket is in use in which case pkt.Header could + // be nil. + combinedVV.AppendView(pkt.Header.View()) } - combinedVV := linkHeader.ToVectorisedView() combinedVV.Append(pkt.Data) packet.data = combinedVV } |