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TUN-6741: ICMP proxy tries to listen on specific IPv4 & IPv6 when possible

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If it cannot determine the correct interface IP, it will fallback to all interfaces.
This commit also introduces the icmpv4-src and icmpv6-src flags
This commit is contained in:
cthuang
2022-09-20 11:39:51 +01:00
parent 3449ea35f2
commit be0305ec58
22 changed files with 262 additions and 109 deletions
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4
quic/datagram.go
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@@ -49,7 +49,7 @@ func (dm *DatagramMuxer) SendToSession(session *packet.Session) error {
packetTooBigDropped.Inc()
return fmt.Errorf("origin UDP payload has %d bytes, which exceeds transport MTU %d", len(session.Payload), dm.mtu())
}
payloadWithMetadata, err := suffixSessionID(session.ID, session.Payload)
payloadWithMetadata, err := SuffixSessionID(session.ID, session.Payload)
if err != nil {
return errors.Wrap(err, "Failed to suffix session ID to datagram, it will be dropped")
}
@@ -112,7 +112,7 @@ func extractSessionID(b []byte) (uuid.UUID, []byte, error) {
// SuffixSessionID appends the session ID at the end of the payload. Suffix is more performant than prefix because
// the payload slice might already have enough capacity to append the session ID at the end
func suffixSessionID(sessionID uuid.UUID, b []byte) ([]byte, error) {
func SuffixSessionID(sessionID uuid.UUID, b []byte) ([]byte, error) {
if len(b)+len(sessionID) > MaxDatagramFrameSize {
return nil, fmt.Errorf("datagram size exceed %d", MaxDatagramFrameSize)
}