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net/packet: add IPv6 source and destination IPs to Parsed.

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Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson
2020-11-10 00:04:27 -08:00
committed by Dave Anderson
parent d192bd0f86
commit 89894c6930
8 changed files with 66 additions and 40 deletions
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wgengine/userspace.go
+3 -3
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@@ -397,7 +397,7 @@ func (e *userspaceEngine) handleLocalPackets(p *packet.Parsed, t *tstun.TUN) fil
return filter.Drop
}
if runtime.GOOS == "darwin" && e.isLocalAddr(p.DstIP) {
if runtime.GOOS == "darwin" && e.isLocalAddr(p.DstIP4) {
// macOS NetworkExtension directs packets destined to the
// tunnel's local IP address into the tunnel, instead of
// looping back within the kernel network stack. We have to
@@ -421,10 +421,10 @@ func (e *userspaceEngine) isLocalAddr(ip packet.IP4) bool {
// handleDNS is an outbound pre-filter resolving Tailscale domains.
func (e *userspaceEngine) handleDNS(p *packet.Parsed, t *tstun.TUN) filter.Response {
if p.DstIP == magicDNSIP && p.DstPort == magicDNSPort && p.IPProto == packet.UDP {
if p.DstIP4 == magicDNSIP && p.DstPort == magicDNSPort && p.IPProto == packet.UDP {
request := tsdns.Packet{
Payload: append([]byte(nil), p.Payload()...),
Addr: netaddr.IPPort{IP: p.SrcIP.Netaddr(), Port: p.SrcPort},
Addr: netaddr.IPPort{IP: p.SrcIP4.Netaddr(), Port: p.SrcPort},
}
err := e.resolver.EnqueueRequest(request)
if err != nil {