// New handles creating a new tcpassembly.Stream.
func (f *myFactory) New(netFlow, tcpFlow gopacket.Flow) tcpassembly.Stream {
// Create a new stream.
s := &myStream{}
// Find the bidi bidirectional struct for this stream, creating a new one if
// one doesn't already exist in the map.
k := key{netFlow, tcpFlow}
bd := f.bidiMap[k]
if bd == nil {
bd = &bidi{a: s, key: k}
log.Printf("[%v] created first side of bidirectional stream", bd.key)
// Register bidirectional with the reverse key, so the matching stream going
// the other direction will find it.
f.bidiMap[key{netFlow.Reverse(), tcpFlow.Reverse()}] = bd
} else {
log.Printf("[%v] found second side of bidirectional stream", bd.key)
bd.b = s
// Clear out the bidi we're using from the map, just in case.
delete(f.bidiMap, k)
}
s.bidi = bd
return s
}
