// When using TCP, and the host resolves to multiple IP addresses,
// Dial will try each IP address in order until one succeeds.
//
// Examples:
//
//	Dial("tcp", "golang.org:http")
//	Dial("tcp", "192.0.2.1:http")
//	Dial("tcp", "198.51.100.1:80")
//	Dial("udp", "[2001:db8::1]:domain")
//	Dial("udp", "[fe80::1%lo0]:53")
//	Dial("tcp", ":80")
//
// For IP networks, the network must be "ip", "ip4" or "ip6" followed

		return nil, &DNSError{Err: "dial error test", Name: "name", Server: "server", IsTimeout: true}
	}
	sw.Set(socktest.FilterConnect, func(so *socktest.Status) (socktest.AfterFilter, error) {
		return nil, errOpNotSupported
	})
	defer sw.Set(socktest.FilterConnect, nil)

	d := Dialer{Timeout: someTimeout}
	for i, tt := range dialErrorTests {
		i, tt := i, tt

	}

	return tlsConn, nil
}

// dialWithoutProxy dials the host specified by url, using TLS if appropriate.
func (s *SpdyRoundTripper) dialWithoutProxy(ctx context.Context, url *url.URL) (net.Conn, error) {
	dialAddr := netutil.CanonicalAddr(url)
	dialer := s.Dialer
	if dialer == nil {
		dialer = &net.Dialer{}
	}

	if url.Scheme == "http" {
		return dialer.DialContext(ctx, "tcp", dialAddr)
	}

//
// DialWithDialer uses context.Background internally; to specify the context,
// use [Dialer.DialContext] with NetDialer set to the desired dialer.
func DialWithDialer(dialer *net.Dialer, network, addr string, config *Config) (*Conn, error) {
	return dial(context.Background(), dialer, network, addr, config)
}

func dial(ctx context.Context, netDialer *net.Dialer, network, addr string, config *Config) (*Conn, error) {
	if netDialer.Timeout != 0 {

	defer ln.Close()
	_, port, err := SplitHostPort(ln.Addr().String())
	if err != nil {
		t.Fatal(err)
	}

	ctx := contextWithNonZeroDeadline{Context: context.Background()}
	var dialer Dialer
	c, err := dialer.DialContext(ctx, "tcp", JoinHostPort("", port))
	if err != nil {
		t.Fatal(err)
	}
	c.Close()

		}()
	}
	attempts := 10 * N
	fails := 0
	d := &Dialer{Timeout: 200 * time.Millisecond}
	for i := 0; i < attempts; i++ {
		c, err := d.Dial("tcp", ln.Addr().String())
		if err != nil {
			fails++
		} else {
			c.Close()
		}
	}
	ln.Close()
	wg.Wait()
	if fails > attempts/9 { // see issues 7400 and 7541
		t.Fatalf("too many Dial failed: %v", fails)
	}
	if fails > 0 {

			}

			trch := make(chan error, 1)
			_, port, err := SplitHostPort(ls.PacketConn.LocalAddr().String())
			if err != nil {
				t.Fatal(err)
			}
			if tt.dial {
				d := Dialer{Timeout: someTimeout}
				c2, err := d.Dial(tt.tnet, JoinHostPort(tt.taddr, port))
				if err != nil {
					if perr := parseDialError(err); perr != nil {
						t.Error(perr)
					}
					t.Fatal(err)
				}

				delay := afterDial.Sub(beforeDial)
				if delay < d.Timeout {
					t.Errorf("Dial returned after %v; want ≥%v", delay, d.Timeout)
				}
			}

			if perr := parseDialError(err); perr != nil {
				t.Errorf("unexpected error from Dial: %v", perr)
			}
			if nerr, ok := err.(Error); !ok || !nerr.Timeout() {
				t.Errorf("Dial: %v, want timeout", err)
			}
		})
	}
}

	serverDone := make(chan struct{})
	dialed := make(chan struct{})
	go func() {
		defer close(serverDone)

		cs, err := ln.Accept()
		if err != nil {
			return
		}
		<-dialed
		cs.(*TCPConn).SetLinger(0)
		cs.Close()
	}()
	defer func() {
		ln.Close()
		<-serverDone
	}()

	ss, err := Dial("tcp", ln.Addr().String())
	close(dialed)
	if err != nil {
		t.Fatal(err)
	}

// dial makes a new connection to the provided server (which must be
// an IP address) with the provided network type, using either r.Dial
// (if both r and r.Dial are non-nil) or else Dialer.DialContext.
func (r *Resolver) dial(ctx context.Context, network, server string) (Conn, error) {
	// Calling Dial here is scary -- we have to be sure not to
	// dial a name that will require a DNS lookup, or Dial will