Ejemplo n.º 1
0
// 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(ctx context.Context, p peer.ID, pids ...protocol.ID) (inet.Stream, error) {
	pref, err := h.preferredProtocol(p, pids)
	if err != nil {
		return nil, err
	}

	if pref != "" {
		return h.newStream(ctx, p, pref)
	}

	var protoStrs []string
	for _, pid := range pids {
		protoStrs = append(protoStrs, string(pid))
	}

	s, err := h.Network().NewStream(ctx, p)
	if err != nil {
		return nil, err
	}

	selected, err := msmux.SelectOneOf(protoStrs, s)
	if err != nil {
		s.Close()
		return nil, err
	}
	selpid := protocol.ID(selected)
	s.SetProtocol(selpid)
	h.Peerstore().AddProtocols(p, selected)

	return mstream.WrapStream(s, h.bwc), nil
}
Ejemplo n.º 2
0
func (t *transport) NewConn(nc net.Conn, isServer bool) (pst.Conn, error) {
	var proto string
	if isServer {
		selected, _, err := t.mux.Negotiate(nc)
		if err != nil {
			return nil, err
		}
		proto = selected
	} else {
		// prefer yamux
		selected, err := mss.SelectOneOf([]string{"/yamux", "/spdystream", "/multiplex"}, nc)
		if err != nil {
			return nil, err
		}
		proto = selected
	}

	tpt := t.tpts[proto]

	return tpt.NewConn(nc, isServer)
}