main_test.go

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !js
     6  
     7  package net
     8  
     9  import (
    10  	"flag"
    11  	"fmt"
    12  	"net/internal/socktest"
    13  	"os"
    14  	"runtime"
    15  	"sort"
    16  	"strings"
    17  	"sync"
    18  	"testing"
    19  )
    20  
    21  var (
    22  	sw socktest.Switch
    23  
    24  	// uninstallTestHooks runs just before a run of benchmarks.
    25  	testHookUninstaller sync.Once
    26  )
    27  
    28  var (
    29  	testTCPBig = flag.Bool("tcpbig", false, "whether to test massive size of data per read or write call on TCP connection")
    30  
    31  	testDNSFlood = flag.Bool("dnsflood", false, "whether to test DNS query flooding")
    32  
    33  	// If external IPv4 connectivity exists, we can try dialing
    34  	// non-node/interface local scope IPv4 addresses.
    35  	// On Windows, Lookup APIs may not return IPv4-related
    36  	// resource records when a node has no external IPv4
    37  	// connectivity.
    38  	testIPv4 = flag.Bool("ipv4", true, "assume external IPv4 connectivity exists")
    39  
    40  	// If external IPv6 connectivity exists, we can try dialing
    41  	// non-node/interface local scope IPv6 addresses.
    42  	// On Windows, Lookup APIs may not return IPv6-related
    43  	// resource records when a node has no external IPv6
    44  	// connectivity.
    45  	testIPv6 = flag.Bool("ipv6", false, "assume external IPv6 connectivity exists")
    46  )
    47  
    48  func TestMain(m *testing.M) {
    49  	setupTestData()
    50  	installTestHooks()
    51  
    52  	st := m.Run()
    53  
    54  	testHookUninstaller.Do(uninstallTestHooks)
    55  	if testing.Verbose() {
    56  		printRunningGoroutines()
    57  		printInflightSockets()
    58  		printSocketStats()
    59  	}
    60  	forceCloseSockets()
    61  	os.Exit(st)
    62  }
    63  
    64  type ipv6LinkLocalUnicastTest struct {
    65  	network, address string
    66  	nameLookup       bool
    67  }
    68  
    69  var (
    70  	ipv6LinkLocalUnicastTCPTests []ipv6LinkLocalUnicastTest
    71  	ipv6LinkLocalUnicastUDPTests []ipv6LinkLocalUnicastTest
    72  )
    73  
    74  func setupTestData() {
    75  	if supportsIPv4() {
    76  		resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
    77  			{"tcp", "localhost:1", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 1}, nil},
    78  			{"tcp4", "localhost:2", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 2}, nil},
    79  		}...)
    80  		resolveUDPAddrTests = append(resolveUDPAddrTests, []resolveUDPAddrTest{
    81  			{"udp", "localhost:1", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 1}, nil},
    82  			{"udp4", "localhost:2", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 2}, nil},
    83  		}...)
    84  		resolveIPAddrTests = append(resolveIPAddrTests, []resolveIPAddrTest{
    85  			{"ip", "localhost", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
    86  			{"ip4", "localhost", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
    87  		}...)
    88  	}
    89  
    90  	if supportsIPv6() {
    91  		resolveTCPAddrTests = append(resolveTCPAddrTests, resolveTCPAddrTest{"tcp6", "localhost:3", &TCPAddr{IP: IPv6loopback, Port: 3}, nil})
    92  		resolveUDPAddrTests = append(resolveUDPAddrTests, resolveUDPAddrTest{"udp6", "localhost:3", &UDPAddr{IP: IPv6loopback, Port: 3}, nil})
    93  		resolveIPAddrTests = append(resolveIPAddrTests, resolveIPAddrTest{"ip6", "localhost", &IPAddr{IP: IPv6loopback}, nil})
    94  
    95  		// Issue 20911: don't return IPv4 addresses for
    96  		// Resolve*Addr calls of the IPv6 unspecified address.
    97  		resolveTCPAddrTests = append(resolveTCPAddrTests, resolveTCPAddrTest{"tcp", "[::]:4", &TCPAddr{IP: IPv6unspecified, Port: 4}, nil})
    98  		resolveUDPAddrTests = append(resolveUDPAddrTests, resolveUDPAddrTest{"udp", "[::]:4", &UDPAddr{IP: IPv6unspecified, Port: 4}, nil})
    99  		resolveIPAddrTests = append(resolveIPAddrTests, resolveIPAddrTest{"ip", "::", &IPAddr{IP: IPv6unspecified}, nil})
   100  	}
   101  
   102  	ifi := loopbackInterface()
   103  	if ifi != nil {
   104  		index := fmt.Sprintf("%v", ifi.Index)
   105  		resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
   106  			{"tcp6", "[fe80::1%" + ifi.Name + "]:1", &TCPAddr{IP: ParseIP("fe80::1"), Port: 1, Zone: zoneCache.name(ifi.Index)}, nil},
   107  			{"tcp6", "[fe80::1%" + index + "]:2", &TCPAddr{IP: ParseIP("fe80::1"), Port: 2, Zone: index}, nil},
   108  		}...)
   109  		resolveUDPAddrTests = append(resolveUDPAddrTests, []resolveUDPAddrTest{
   110  			{"udp6", "[fe80::1%" + ifi.Name + "]:1", &UDPAddr{IP: ParseIP("fe80::1"), Port: 1, Zone: zoneCache.name(ifi.Index)}, nil},
   111  			{"udp6", "[fe80::1%" + index + "]:2", &UDPAddr{IP: ParseIP("fe80::1"), Port: 2, Zone: index}, nil},
   112  		}...)
   113  		resolveIPAddrTests = append(resolveIPAddrTests, []resolveIPAddrTest{
   114  			{"ip6", "fe80::1%" + ifi.Name, &IPAddr{IP: ParseIP("fe80::1"), Zone: zoneCache.name(ifi.Index)}, nil},
   115  			{"ip6", "fe80::1%" + index, &IPAddr{IP: ParseIP("fe80::1"), Zone: index}, nil},
   116  		}...)
   117  	}
   118  
   119  	addr := ipv6LinkLocalUnicastAddr(ifi)
   120  	if addr != "" {
   121  		if runtime.GOOS != "dragonfly" {
   122  			ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
   123  				{"tcp", "[" + addr + "%" + ifi.Name + "]:0", false},
   124  			}...)
   125  			ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
   126  				{"udp", "[" + addr + "%" + ifi.Name + "]:0", false},
   127  			}...)
   128  		}
   129  		ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
   130  			{"tcp6", "[" + addr + "%" + ifi.Name + "]:0", false},
   131  		}...)
   132  		ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
   133  			{"udp6", "[" + addr + "%" + ifi.Name + "]:0", false},
   134  		}...)
   135  		switch runtime.GOOS {
   136  		case "darwin", "ios", "dragonfly", "freebsd", "openbsd", "netbsd":
   137  			ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
   138  				{"tcp", "[localhost%" + ifi.Name + "]:0", true},
   139  				{"tcp6", "[localhost%" + ifi.Name + "]:0", true},
   140  			}...)
   141  			ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
   142  				{"udp", "[localhost%" + ifi.Name + "]:0", true},
   143  				{"udp6", "[localhost%" + ifi.Name + "]:0", true},
   144  			}...)
   145  		case "linux":
   146  			ipv6LinkLocalUnicastTCPTests = append(ipv6LinkLocalUnicastTCPTests, []ipv6LinkLocalUnicastTest{
   147  				{"tcp", "[ip6-localhost%" + ifi.Name + "]:0", true},
   148  				{"tcp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
   149  			}...)
   150  			ipv6LinkLocalUnicastUDPTests = append(ipv6LinkLocalUnicastUDPTests, []ipv6LinkLocalUnicastTest{
   151  				{"udp", "[ip6-localhost%" + ifi.Name + "]:0", true},
   152  				{"udp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
   153  			}...)
   154  		}
   155  	}
   156  }
   157  
   158  func printRunningGoroutines() {
   159  	gss := runningGoroutines()
   160  	if len(gss) == 0 {
   161  		return
   162  	}
   163  	fmt.Fprintf(os.Stderr, "Running goroutines:\n")
   164  	for _, gs := range gss {
   165  		fmt.Fprintf(os.Stderr, "%v\n", gs)
   166  	}
   167  	fmt.Fprintf(os.Stderr, "\n")
   168  }
   169  
   170  // runningGoroutines returns a list of remaining goroutines.
   171  func runningGoroutines() []string {
   172  	var gss []string
   173  	b := make([]byte, 2<<20)
   174  	b = b[:runtime.Stack(b, true)]
   175  	for _, s := range strings.Split(string(b), "\n\n") {
   176  		_, stack, _ := strings.Cut(s, "\n")
   177  		stack = strings.TrimSpace(stack)
   178  		if !strings.Contains(stack, "created by net") {
   179  			continue
   180  		}
   181  		gss = append(gss, stack)
   182  	}
   183  	sort.Strings(gss)
   184  	return gss
   185  }
   186  
   187  func printInflightSockets() {
   188  	sos := sw.Sockets()
   189  	if len(sos) == 0 {
   190  		return
   191  	}
   192  	fmt.Fprintf(os.Stderr, "Inflight sockets:\n")
   193  	for s, so := range sos {
   194  		fmt.Fprintf(os.Stderr, "%v: %v\n", s, so)
   195  	}
   196  	fmt.Fprintf(os.Stderr, "\n")
   197  }
   198  
   199  func printSocketStats() {
   200  	sts := sw.Stats()
   201  	if len(sts) == 0 {
   202  		return
   203  	}
   204  	fmt.Fprintf(os.Stderr, "Socket statistical information:\n")
   205  	for _, st := range sts {
   206  		fmt.Fprintf(os.Stderr, "%v\n", st)
   207  	}
   208  	fmt.Fprintf(os.Stderr, "\n")
   209  }
   210
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