if h := sd.testHookDialTCP; h != nil {
		return h(ctx, sd.network, laddr, raddr)
	}
	if h := testHookDialTCP; h != nil {
		return h(ctx, sd.network, laddr, raddr)
	}
	return sd.doDialTCP(ctx, laddr, raddr)
}

func (sd *sysDialer) doDialTCP(ctx context.Context, laddr, raddr *TCPAddr) (*TCPConn, error) {
	switch sd.network {
	case "tcp4":
		// Plan 9 doesn't complain about [::]:0->127.0.0.1, so it's up to us.

	if h := sd.testHookDialTCP; h != nil {
		return h(ctx, sd.network, laddr, raddr)
	}
	if h := testHookDialTCP; h != nil {
		return h(ctx, sd.network, laddr, raddr)
	}
	return sd.doDialTCP(ctx, laddr, raddr)
}

func (sd *sysDialer) doDialTCP(ctx context.Context, laddr, raddr *TCPAddr) (*TCPConn, error) {
	return sd.doDialTCPProto(ctx, laddr, raddr, 0)
}

// before the deadline.
func slowDialTCP(ctx context.Context, network string, laddr, raddr *TCPAddr) (*TCPConn, error) {
	sd := &sysDialer{network: network, address: raddr.String()}
	c, err := sd.doDialTCP(ctx, laddr, raddr)
	if ParseIP(slowDst4).Equal(raddr.IP) || ParseIP(slowDst6).Equal(raddr.IP) {
		// Wait for the deadline, or indefinitely if none exists.
		<-ctx.Done()
	}
	return c, err
}

String id=46
	data="net.(*sysDialer).doDialTCPProto"
String id=47
	data="/usr/local/google/home/mknyszek/work/go-1/src/net/tcpsock_posix.go"
String id=48
	data="net.(*sysDialer).doDialTCP"
String id=49
	data="net.(*sysDialer).dialTCP"
String id=50
	data="net.(*sysDialer).dialSingle"
String id=51
	data="/usr/local/google/home/mknyszek/work/go-1/src/net/dial.go"
String id=52