示例#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)
}
示例#2
0
文件: dial.go 项目: avbalu/go-ipfs
// rawConnDial dials the underlying net.Conn + manet.Conns
func (d *Dialer) rawConnDial(ctx context.Context, raddr ma.Multiaddr, remote peer.ID) (manet.Conn, error) {

	// before doing anything, check we're going to be able to dial.
	// we may not support the given address.
	if _, _, err := manet.DialArgs(raddr); err != nil {
		return nil, err
	}

	if strings.HasPrefix(raddr.String(), "/ip4/0.0.0.0") {
		log.Event(ctx, "connDialZeroAddr", lgbl.Dial("conn", d.LocalPeer, remote, nil, raddr))
		return nil, fmt.Errorf("Attempted to connect to zero address: %s", raddr)
	}

	// get local addr to use.
	laddr := pickLocalAddr(d.LocalAddrs, raddr)
	logdial := lgbl.Dial("conn", d.LocalPeer, remote, laddr, raddr)
	defer log.EventBegin(ctx, "connDialRawConn", logdial).Done()

	// make a copy of the manet.Dialer, we may need to change its timeout.
	madialer := d.Dialer

	if laddr != nil && reuseportIsAvailable() {
		// we're perhaps going to dial twice. half the timeout, so we can afford to.
		// otherwise our context would expire right after the first dial.
		madialer.Dialer.Timeout = (madialer.Dialer.Timeout / 2)

		// dial using reuseport.Dialer, because we're probably reusing addrs.
		// this is optimistic, as the reuseDial may fail to bind the port.
		rpev := log.EventBegin(ctx, "connDialReusePort", logdial)
		if nconn, retry, reuseErr := reuseDial(madialer.Dialer, laddr, raddr); reuseErr == nil {
			// if it worked, wrap the raw net.Conn with our manet.Conn
			logdial["reuseport"] = "success"
			rpev.Done()
			return manet.WrapNetConn(nconn)
		} else if !retry {
			// reuseDial is sure this is a legitimate dial failure, not a reuseport failure.
			logdial["reuseport"] = "failure"
			logdial["error"] = reuseErr
			rpev.Done()
			return nil, reuseErr
		} else {
			// this is a failure to reuse port. log it.
			logdial["reuseport"] = "retry"
			logdial["error"] = reuseErr
			rpev.Done()
		}
	}

	defer log.EventBegin(ctx, "connDialManet", logdial).Done()
	return madialer.Dial(raddr)
}
示例#3
0
文件: utp.go 项目: noffle/go-ipfs
func (s *UtpSocket) Accept() (Conn, error) {
	c, err := s.s.Accept()
	if err != nil {
		return nil, err
	}

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

	return &connWrap{
		Conn:      mnc,
		transport: s.transport,
	}, nil
}
示例#4
0
文件: utp.go 项目: noffle/go-ipfs
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
}