TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-10-25 02:02:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

wgengine/packet: refactor and expose UDP header marshaling (#408)

Browse Source 
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
This commit is contained in:
Dmytro Shynkevych
2020-06-04 18:42:44 -04:00
committed by GitHub
parent 5e0ff494a5
commit 059b1d10bb
11 changed files with 793 additions and 216 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
wgengine/tstun/tun.go
View File

@@ -176,10 +176,11 @@ func (t *TUN) filterOut(buf []byte) filter.Response {
return filter.Drop
}
var q packet.QDecode
if filt.RunOut(buf, &q, t.filterFlags) == filter.Accept {
var p packet.ParsedPacket
if filt.RunOut(buf, &p, t.filterFlags) == filter.Accept {
return filter.Accept
}
return filter.Drop
}
@@ -218,13 +219,15 @@ func (t *TUN) filterIn(buf []byte) filter.Response {
return filter.Drop
}
var q packet.QDecode
if filt.RunIn(buf, &q, t.filterFlags) == filter.Accept {
var p packet.ParsedPacket
if filt.RunIn(buf, &p, t.filterFlags) == filter.Accept {
// Only in fake mode, answer any incoming pings.
if q.IsEchoRequest() {
if p.IsEchoRequest() {
ft, ok := t.tdev.(*fakeTUN)
if ok {
packet := q.EchoRespond()
header := p.ICMPHeader()
header.ToResponse()
packet := packet.Generate(&header, p.Payload())
ft.Write(packet, 0)
// We already handled it, stop.
return filter.Drop
@@ -232,6 +235,7 @@ func (t *TUN) filterIn(buf []byte) filter.Response {
}
return filter.Accept
}
return filter.Drop
}