diff options
Diffstat (limited to 'pkg/tcpip/network/ipv6/icmp.go')
| -rw-r--r-- | pkg/tcpip/network/ipv6/icmp.go | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/pkg/tcpip/network/ipv6/icmp.go b/pkg/tcpip/network/ipv6/icmp.go index e3ef89d26..b18b78830 100644 --- a/pkg/tcpip/network/ipv6/icmp.go +++ b/pkg/tcpip/network/ipv6/icmp.go @@ -62,6 +62,7 @@ func (e *endpoint) handleControl(typ stack.ControlType, extra uint32, vv *buffer e.dispatcher.DeliverTransportControlPacket(e.id.LocalAddress, h.DestinationAddress(), ProtocolNumber, p, typ, extra, vv) } +// TODO: take buffer.VectorisedView by value. func (e *endpoint) handleICMP(r *stack.Route, vv *buffer.VectorisedView) { v := vv.First() if len(v) < header.ICMPv6MinimumSize { @@ -105,8 +106,8 @@ func (e *endpoint) handleICMP(r *stack.Route, vv *buffer.VectorisedView) { pkt[icmpV6OptOffset] = ndpOptDstLinkAddr pkt[icmpV6LengthOffset] = 1 copy(pkt[icmpV6LengthOffset+1:], r.LocalLinkAddress[:]) - pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, nil)) - r.WritePacket(&hdr, nil, header.ICMPv6ProtocolNumber) + pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, buffer.VectorisedView{})) + r.WritePacket(&hdr, buffer.VectorisedView{}, header.ICMPv6ProtocolNumber) e.linkAddrCache.AddLinkAddress(e.nicid, r.RemoteAddress, r.RemoteLinkAddress) @@ -125,13 +126,12 @@ func (e *endpoint) handleICMP(r *stack.Route, vv *buffer.VectorisedView) { return } vv.TrimFront(header.ICMPv6EchoMinimumSize) - data := vv.ToView() hdr := buffer.NewPrependable(int(r.MaxHeaderLength()) + header.IPv6MinimumSize + header.ICMPv6EchoMinimumSize) pkt := header.ICMPv6(hdr.Prepend(header.ICMPv6EchoMinimumSize)) copy(pkt, h) pkt.SetType(header.ICMPv6EchoReply) - pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, data)) - r.WritePacket(&hdr, data, header.ICMPv6ProtocolNumber) + pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, *vv)) + r.WritePacket(&hdr, *vv, header.ICMPv6ProtocolNumber) case header.ICMPv6EchoReply: if len(v) < header.ICMPv6EchoMinimumSize { @@ -185,7 +185,7 @@ func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, linkEP stack. pkt[icmpV6OptOffset] = ndpOptSrcLinkAddr pkt[icmpV6LengthOffset] = 1 copy(pkt[icmpV6LengthOffset+1:], linkEP.LinkAddress()) - pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, nil)) + pkt.SetChecksum(icmpChecksum(pkt, r.LocalAddress, r.RemoteAddress, buffer.VectorisedView{})) length := uint16(hdr.UsedLength()) ip := header.IPv6(hdr.Prepend(header.IPv6MinimumSize)) @@ -197,7 +197,7 @@ func (*protocol) LinkAddressRequest(addr, localAddr tcpip.Address, linkEP stack. DstAddr: r.RemoteAddress, }) - return linkEP.WritePacket(r, &hdr, nil, ProtocolNumber) + return linkEP.WritePacket(r, &hdr, buffer.VectorisedView{}, ProtocolNumber) } // ResolveStaticAddress implements stack.LinkAddressResolver. @@ -205,15 +205,17 @@ func (*protocol) ResolveStaticAddress(addr tcpip.Address) (tcpip.LinkAddress, bo return "", false } -func icmpChecksum(h header.ICMPv6, src, dst tcpip.Address, data []byte) uint16 { +func icmpChecksum(h header.ICMPv6, src, dst tcpip.Address, vv buffer.VectorisedView) uint16 { // Calculate the IPv6 pseudo-header upper-layer checksum. xsum := header.Checksum([]byte(src), 0) xsum = header.Checksum([]byte(dst), xsum) var upperLayerLength [4]byte - binary.BigEndian.PutUint32(upperLayerLength[:], uint32(len(h)+len(data))) + binary.BigEndian.PutUint32(upperLayerLength[:], uint32(len(h)+vv.Size())) xsum = header.Checksum(upperLayerLength[:], xsum) xsum = header.Checksum([]byte{0, 0, 0, uint8(header.ICMPv6ProtocolNumber)}, xsum) - xsum = header.Checksum(data, xsum) + for _, v := range vv.Views() { + xsum = header.Checksum(v, xsum) + } // h[2:4] is the checksum itself, set it aside to avoid checksumming the checksum. h2, h3 := h[2], h[3] |