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| author | Austin Kiekintveld <akiek@google.com> | 2019-07-31 11:25:25 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-07-31 11:26:41 -0700 |
| commit | 12c4eb294a43f4a84a789871730869d164ef52c9 (patch) | |
| tree | d765c0eed3a0d616e1bc229a68ee8e1073e96444 /pkg | |
| parent | c6e6d92cb116fb79a8acd2ee64726b6b53135ad4 (diff) | |
Fix ICMPv4 EchoReply packet checksum
The checksum was not being reset before being re-calculated and sent out.
This caused the sent checksum to always be `0x0800`.
Fixes #605.
PiperOrigin-RevId: 260965059
Diffstat (limited to 'pkg')
| -rw-r--r-- | pkg/tcpip/network/ipv4/icmp.go | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go index fbef6947d..497164cbb 100644 --- a/pkg/tcpip/network/ipv4/icmp.go +++ b/pkg/tcpip/network/ipv4/icmp.go @@ -94,6 +94,7 @@ func (e *endpoint) handleICMP(r *stack.Route, netHeader buffer.View, vv buffer.V pkt := header.ICMPv4(hdr.Prepend(header.ICMPv4MinimumSize)) copy(pkt, h) pkt.SetType(header.ICMPv4EchoReply) + pkt.SetChecksum(0) pkt.SetChecksum(^header.Checksum(pkt, header.ChecksumVV(vv, 0))) sent := stats.ICMP.V4PacketsSent if err := r.WritePacket(nil /* gso */, hdr, vv, header.ICMPv4ProtocolNumber, r.DefaultTTL()); err != nil { |