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Return ICMPv6 Destination Unreachable for unknown destinations (#748)
* Return ICMPv6 Destination Unreachable for unknown destinations * Update go.mod/go.sum for yggdrasil-extras * go mod tidy
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@ -5,6 +5,9 @@ import (
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"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
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"github.com/yggdrasil-network/yggdrasil-go/src/yggdrasil"
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"golang.org/x/net/icmp"
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"golang.org/x/net/ipv6"
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"github.com/Arceliar/phony"
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)
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@ -147,6 +150,16 @@ func (tun *TunAdapter) _handlePacket(recvd []byte, err error) {
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}
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if addrlen != 16 || (!dstAddr.IsValid() && !dstSnet.IsValid()) {
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// Couldn't find this node's ygg IP
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dlen := len(bs)
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if dlen > 900 {
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dlen = 900
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}
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ptb := &icmp.DstUnreach{
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Data: bs[:dlen],
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}
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if packet, err := CreateICMPv6(bs[8:24], bs[24:40], ipv6.ICMPTypeDestinationUnreachable, 0, ptb); err == nil {
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tun.writer.writeFrom(nil, packet)
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}
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return
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}
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// Do we have an active connection for this node address?
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