// newStreamHandler is the remote-opened stream handler for inet.Network
// TODO: this feels a bit wonky
func (h *BasicHost) newStreamHandler(s inet.Stream) {
protoID, handle, err := h.Mux().ReadHeader(s)
if err != nil {
if err == io.EOF {
log.Debugf("protocol EOF: %s", s.Conn().RemotePeer())
} else {
log.Warning("protocol mux failed: %s", err)
}
return
}
logStream := mstream.WrapStream(s, protoID, h.bwc)
go handle(logStream)
}
func (ids *IDService) RequestHandler(s inet.Stream) {
defer s.Close()
c := s.Conn()
bwc := ids.Host.GetBandwidthReporter()
s = mstream.WrapStream(s, ID, bwc)
w := ggio.NewDelimitedWriter(s)
mes := pb.Identify{}
ids.populateMessage(&mes, s.Conn())
w.WriteMsg(&mes)
log.Debugf("%s sent message to %s %s", ID,
c.RemotePeer(), c.RemoteMultiaddr())
}
// NewStream opens a new stream to given peer p, and writes a p2p/protocol
// header with given protocol.ID. If there is no connection to p, attempts
// to create one. If ProtocolID is "", writes no header.
// (Threadsafe)
func (h *BasicHost) NewStream(pid protocol.ID, p peer.ID) (inet.Stream, error) {
s, err := h.Network().NewStream(p)
if err != nil {
return nil, err
}
logStream := mstream.WrapStream(s, pid, h.bwc)
if err := protocol.WriteHeader(logStream, pid); err != nil {
logStream.Close()
return nil, err
}
return logStream, nil
}
func (ids *IDService) IdentifyConn(c inet.Conn) {
ids.currmu.Lock()
if wait, found := ids.currid[c]; found {
ids.currmu.Unlock()
log.Debugf("IdentifyConn called twice on: %s", c)
<-wait // already identifying it. wait for it.
return
}
ids.currid[c] = make(chan struct{})
ids.currmu.Unlock()
s, err := c.NewStream()
if err != nil {
log.Debugf("error opening initial stream for %s", ID)
log.Event(context.TODO(), "IdentifyOpenFailed", c.RemotePeer())
c.Close()
return
} else {
bwc := ids.Host.GetBandwidthReporter()
s = mstream.WrapStream(s, ID, bwc)
// ok give the response to our handler.
if err := protocol.WriteHeader(s, ID); err != nil {
log.Debugf("error writing stream header for %s", ID)
log.Event(context.TODO(), "IdentifyOpenFailed", c.RemotePeer())
s.Close()
c.Close()
return
}
ids.ResponseHandler(s)
}
ids.currmu.Lock()
ch, found := ids.currid[c]
delete(ids.currid, c)
ids.currmu.Unlock()
if !found {
log.Debugf("IdentifyConn failed to find channel (programmer error) for %s", c)
return
}
close(ch) // release everyone waiting.
}