yggdrasil-network/yggdrasil-go
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Fix checksums and packet buffers, sends ICMPv6 Packet Too Big messages successfully now

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This commit is contained in:
Neil Alexander 2018-02-15 13:38:54 +00:00
parent 37e4492b86
commit 1c59338f01
2 changed files with 21 additions and 26 deletions
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5
src/yggdrasil/router.go
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@ -149,8 +149,6 @@ func (r *router) sendPacket(bs []byte) {
default:
// Generate an ICMPv6 Packet Too Big for packets larger than session MTU
if len(bs) > int(sinfo.getMTU()) {
sinfo.core.log.Printf("Packet length %d exceeds session MTU %d", len(bs), sinfo.getMTU())
// Get the size of the oversized payload, up to a max of 900 bytes
window := 900
if int(sinfo.getMTU()) < window {
@ -159,14 +157,13 @@ func (r *router) sendPacket(bs []byte) {
// Create the Packet Too Big response
ptb := &icmp.PacketTooBig{
MTU: int(sinfo.getMTU()),
MTU: int(sinfo.getMTU()),
Data: bs[:window],
}
// Create the ICMPv6 response from it
icmpv6Buf, err := r.core.tun.icmpv6.create_icmpv6_tun(bs[8:24], ipv6.ICMPTypePacketTooBig, 0, ptb)
if err == nil {
sinfo.core.log.Printf("Sending ICMPv6 Message Too Big")
r.recv <- icmpv6Buf
}