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TUN-6654: Support ICMPv6 on Linux and Darwin

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This commit is contained in:
cthuang
2022-09-06 13:46:21 +01:00
parent a65f8bce7f
commit bf3d70d1d2
7 changed files with 232 additions and 68 deletions
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24
ingress/icmp_linux.go
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@@ -110,26 +110,26 @@ func (ip *icmpProxy) Serve(ctx context.Context) error {
func (ip *icmpProxy) listenResponse(flow *icmpEchoFlow, conn *icmp.PacketConn) error {
buf := make([]byte, mtu)
for {
n, src, err := conn.ReadFrom(buf)
n, from, err := conn.ReadFrom(buf)
if err != nil {
return err
}
if err := ip.handleResponse(flow, src, buf[:n]); err != nil {
ip.logger.Err(err).Str("dst", src.String()).Msg("Failed to handle ICMP response")
reply, err := parseReply(from, buf[:n])
if err != nil {
ip.logger.Error().Err(err).Str("dst", from.String()).Msg("Failed to parse ICMP reply")
continue
}
if !isEchoReply(reply.msg) {
ip.logger.Debug().Str("dst", from.String()).Msgf("Drop ICMP %s from reply", reply.msg.Type)
continue
}
if err := flow.returnToSrc(reply); err != nil {
ip.logger.Err(err).Str("dst", from.String()).Msg("Failed to send ICMP reply")
continue
}
}
}
func (ip *icmpProxy) handleResponse(flow *icmpEchoFlow, from net.Addr, rawMsg []byte) error {
reply, err := parseReply(from, rawMsg)
if err != nil {
return err
}
return flow.returnToSrc(reply)
}
// originSender wraps icmp.PacketConn to implement packet.FunnelUniPipe interface
type originSender struct {
conn *icmp.PacketConn