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Use flags to check for NAT in conntrack data

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This commit is contained in:
Bryan Boreham
2018-11-26 15:07:35 +00:00
parent 85df164dc7
commit ceafa6c1d0
1 changed files with 11 additions and 10 deletions
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21
probe/endpoint/connection_tracker.go
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@@ -43,18 +43,19 @@ func newConnectionTracker(conf ReporterConfig) connectionTracker {
}
func flowToTuple(f conntrack.Conn) (ft fourTuple) {
ft = fourTuple{
f.Orig.Src.String(),
f.Orig.Dst.String(),
uint16(f.Orig.SrcPort),
uint16(f.Orig.DstPort),
}
// Handle DNAT-ed connections in the initial state
if !f.Orig.Dst.Equal(f.Reply.Src) {
if (f.Status & conntrack.IPS_DST_NAT) == 0 {
ft = fourTuple{
f.Reply.Dst.String(),
f.Orig.Src.String(),
f.Orig.Dst.String(),
uint16(f.Orig.SrcPort),
uint16(f.Orig.DstPort),
}
} else {
// Handle DNAT-ed connections in the initial state
ft = fourTuple{
f.Orig.Src.String(),
f.Reply.Src.String(),
uint16(f.Reply.DstPort),
uint16(f.Orig.SrcPort),
uint16(f.Reply.SrcPort),
}
}