Ejemplo n.º 1
0
func (d *tcpDialer) reuseDial(raddr ma.Multiaddr) (manet.Conn, error) {
	logdial := lgbl.Dial("conn", "", "", d.laddr, raddr)
	rpev := log.EventBegin(context.TODO(), "tptDialReusePort", logdial)

	network, netraddr, err := manet.DialArgs(raddr)
	if err != nil {
		return nil, err
	}

	con, err := d.rd.Dial(network, netraddr)
	if err == nil {
		logdial["reuseport"] = "success"
		rpev.Done()
		return manet.WrapNetConn(con)
	}

	if !ReuseErrShouldRetry(err) {
		logdial["reuseport"] = "failure"
		logdial["error"] = err
		rpev.Done()
		return nil, err
	}

	logdial["reuseport"] = "retry"
	logdial["error"] = err
	rpev.Done()

	return d.madialer.Dial(raddr)
}
Ejemplo n.º 2
0
// NewMapping attemps to construct a mapping on protocol and internal port
// It will also periodically renew the mapping until the returned Mapping
// -- or its parent NAT -- is Closed.
//
// May not succeed, and mappings may change over time;
// NAT devices may not respect our port requests, and even lie.
// Clients should not store the mapped results, but rather always
// poll our object for the latest mappings.
func (nat *NAT) NewMapping(maddr ma.Multiaddr) (Mapping, error) {
	if nat == nil {
		return nil, fmt.Errorf("no nat available")
	}

	network, addr, err := manet.DialArgs(maddr)
	if err != nil {
		return nil, fmt.Errorf("DialArgs failed on addr:", maddr.String())
	}

	switch network {
	case "tcp", "tcp4", "tcp6":
		network = "tcp"
	case "udp", "udp4", "udp6":
		network = "udp"
	default:
		return nil, fmt.Errorf("transport not supported by NAT: %s", network)
	}

	intports := strings.Split(addr, ":")[1]
	intport, err := strconv.Atoi(intports)
	if err != nil {
		return nil, err
	}

	m := &mapping{
		nat:     nat,
		proto:   network,
		intport: intport,
		intaddr: maddr,
	}
	m.proc = goprocess.WithTeardown(func() error {
		nat.rmMapping(m)
		return nil
	})
	nat.addMapping(m)

	m.proc.AddChild(periodic.Every(MappingDuration/3, func(worker goprocess.Process) {
		nat.establishMapping(m)
	}))

	// do it once synchronously, so first mapping is done right away, and before exiting,
	// allowing users -- in the optimistic case -- to use results right after.
	nat.establishMapping(m)
	return m, nil
}
Ejemplo n.º 3
0
func manetListen(addr ma.Multiaddr) (manet.Listener, error) {
	network, naddr, err := manet.DialArgs(addr)
	if err != nil {
		return nil, err
	}

	if ReuseportIsAvailable() {
		nl, err := reuseport.Listen(network, naddr)
		if err == nil {
			// hey, it worked!
			return manet.WrapNetListener(nl)
		}
		// reuseport is available, but we failed to listen. log debug, and retry normally.
		log.Debugf("reuseport available, but failed to listen: %s %s, %s", network, naddr, err)
	}

	// either reuseport not available, or it failed. try normally.
	return manet.Listen(addr)
}
Ejemplo n.º 4
0
func (fbd *FallbackDialer) utpDial(raddr ma.Multiaddr) (Conn, error) {
	_, addr, err := manet.DialArgs(raddr)
	if err != nil {
		return nil, err
	}

	con, err := utp.Dial(addr)
	if err != nil {
		return nil, err
	}

	mnc, err := manet.WrapNetConn(&mautp.Conn{Conn: con})
	if err != nil {
		return nil, err
	}

	return &connWrap{
		Conn: mnc,
	}, nil
}
Ejemplo n.º 5
0
func (s *UtpSocket) Dial(raddr ma.Multiaddr) (Conn, error) {
	_, addr, err := manet.DialArgs(raddr)
	if err != nil {
		return nil, err
	}

	con, err := s.s.Dial(addr)
	if err != nil {
		return nil, err
	}

	mnc, err := manet.WrapNetConn(&mautp.Conn{Conn: con})
	if err != nil {
		return nil, err
	}

	return &connWrap{
		Conn:      mnc,
		transport: s.transport,
	}, nil
}
Ejemplo n.º 6
0
func (t *UtpTransport) newConn(addr ma.Multiaddr, opts ...DialOpt) (*UtpSocket, error) {
	network, netaddr, err := manet.DialArgs(addr)
	if err != nil {
		return nil, err
	}

	s, err := utp.NewSocket("udp"+network[3:], netaddr)
	if err != nil {
		return nil, err
	}

	laddr, err := manet.FromNetAddr(mautp.MakeAddr(s.LocalAddr()))
	if err != nil {
		return nil, err
	}

	return &UtpSocket{
		s:         s,
		laddr:     laddr,
		transport: t,
	}, nil
}