libgo/go/net/ip_test.go

   1 // Copyright 2009 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 package net
   6
   7 import (
   8         "bytes"
   9         "reflect"
  10         "runtime"
  11         "testing"
  12 )
  13
  14 var parseIPTests = []struct {
  15         in  string
  16         out IP
  17 }{
  18         {"127.0.1.2", IPv4(127, 0, 1, 2)},
  19         {"127.0.0.1", IPv4(127, 0, 0, 1)},
  20         {"127.001.002.003", IPv4(127, 1, 2, 3)},
  21         {"::ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
  22         {"::ffff:127.001.002.003", IPv4(127, 1, 2, 3)},
  23         {"::ffff:7f01:0203", IPv4(127, 1, 2, 3)},
  24         {"0:0:0:0:0000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
  25         {"0:0:0:0:000000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
  26         {"0:0:0:0::ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
  27
  28         {"2001:4860:0:2001::68", IP{0x20, 0x01, 0x48, 0x60, 0, 0, 0x20, 0x01, 0, 0, 0, 0, 0, 0, 0x00, 0x68}},
  29         {"2001:4860:0000:2001:0000:0000:0000:0068", IP{0x20, 0x01, 0x48, 0x60, 0, 0, 0x20, 0x01, 0, 0, 0, 0, 0, 0, 0x00, 0x68}},
  30
  31         {"-0.0.0.0", nil},
  32         {"0.-1.0.0", nil},
  33         {"0.0.-2.0", nil},
  34         {"0.0.0.-3", nil},
  35         {"127.0.0.256", nil},
  36         {"abc", nil},
  37         {"123:", nil},
  38         {"fe80::1%lo0", nil},
  39         {"fe80::1%911", nil},
  40         {"", nil},
  41         {"a1:a2:a3:a4::b1:b2:b3:b4", nil}, // Issue 6628
  42 }
  43
  44 func TestParseIP(t *testing.T) {
  45         for _, tt := range parseIPTests {
  46                 if out := ParseIP(tt.in); !reflect.DeepEqual(out, tt.out) {
  47                         t.Errorf("ParseIP(%q) = %v, want %v", tt.in, out, tt.out)
  48                 }
  49                 if tt.in == "" {
  50                         // Tested in TestMarshalEmptyIP below.
  51                         continue
  52                 }
  53                 var out IP
  54                 if err := out.UnmarshalText([]byte(tt.in)); !reflect.DeepEqual(out, tt.out) || (tt.out == nil) != (err != nil) {
  55                         t.Errorf("IP.UnmarshalText(%q) = %v, %v, want %v", tt.in, out, err, tt.out)
  56                 }
  57         }
  58 }
  59
  60 func TestLookupWithIP(t *testing.T) {
  61         _, err := LookupIP("")
  62         if err == nil {
  63                 t.Errorf(`LookupIP("") succeeded, should fail`)
  64         }
  65         _, err = LookupHost("")
  66         if err == nil {
  67                 t.Errorf(`LookupIP("") succeeded, should fail`)
  68         }
  69
  70         // Test that LookupHost and LookupIP, which normally
  71         // expect host names, work with IP addresses.
  72         for _, tt := range parseIPTests {
  73                 if tt.out != nil {
  74                         addrs, err := LookupHost(tt.in)
  75                         if len(addrs) != 1 || addrs[0] != tt.in || err != nil {
  76                                 t.Errorf("LookupHost(%q) = %v, %v, want %v, nil", tt.in, addrs, err, []string{tt.in})
  77                         }
  78                 } else if !testing.Short() {
  79                         // We can't control what the host resolver does; if it can resolve, say,
  80                         // 127.0.0.256 or fe80::1%911 or a host named 'abc', who are we to judge?
  81                         // Warn about these discrepancies but don't fail the test.
  82                         addrs, err := LookupHost(tt.in)
  83                         if err == nil {
  84                                 t.Logf("warning: LookupHost(%q) = %v, want error", tt.in, addrs)
  85                         }
  86                 }
  87
  88                 if tt.out != nil {
  89                         ips, err := LookupIP(tt.in)
  90                         if len(ips) != 1 || !reflect.DeepEqual(ips[0], tt.out) || err != nil {
  91                                 t.Errorf("LookupIP(%q) = %v, %v, want %v, nil", tt.in, ips, err, []IP{tt.out})
  92                         }
  93                 } else if !testing.Short() {
  94                         ips, err := LookupIP(tt.in)
  95                         // We can't control what the host resolver does. See above.
  96                         if err == nil {
  97                                 t.Logf("warning: LookupIP(%q) = %v, want error", tt.in, ips)
  98                         }
  99                 }
 100         }
 101 }
 102
 103 func BenchmarkParseIP(b *testing.B) {
 104         testHookUninstaller.Do(uninstallTestHooks)
 105
 106         for i := 0; i < b.N; i++ {
 107                 for _, tt := range parseIPTests {
 108                         ParseIP(tt.in)
 109                 }
 110         }
 111 }
 112
 113 // Issue 6339
 114 func TestMarshalEmptyIP(t *testing.T) {
 115         for _, in := range [][]byte{nil, []byte("")} {
 116                 var out = IP{1, 2, 3, 4}
 117                 if err := out.UnmarshalText(in); err != nil || out != nil {
 118                         t.Errorf("UnmarshalText(%v) = %v, %v; want nil, nil", in, out, err)
 119                 }
 120         }
 121         var ip IP
 122         got, err := ip.MarshalText()
 123         if err != nil {
 124                 t.Fatal(err)
 125         }
 126         if !reflect.DeepEqual(got, []byte("")) {
 127                 t.Errorf(`got %#v, want []byte("")`, got)
 128         }
 129 }
 130
 131 var ipStringTests = []struct {
 132         in  IP     // see RFC 791 and RFC 4291
 133         str string // see RFC 791, RFC 4291 and RFC 5952
 134         byt []byte
 135         error
 136 }{
 137         // IPv4 address
 138         {
 139                 IP{192, 0, 2, 1},
 140                 "192.0.2.1",
 141                 []byte("192.0.2.1"),
 142                 nil,
 143         },
 144         {
 145                 IP{0, 0, 0, 0},
 146                 "0.0.0.0",
 147                 []byte("0.0.0.0"),
 148                 nil,
 149         },
 150
 151         // IPv4-mapped IPv6 address
 152         {
 153                 IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 192, 0, 2, 1},
 154                 "192.0.2.1",
 155                 []byte("192.0.2.1"),
 156                 nil,
 157         },
 158         {
 159                 IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 0, 0, 0},
 160                 "0.0.0.0",
 161                 []byte("0.0.0.0"),
 162                 nil,
 163         },
 164
 165         // IPv6 address
 166         {
 167                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0x1, 0x23, 0, 0x12, 0, 0x1},
 168                 "2001:db8::123:12:1",
 169                 []byte("2001:db8::123:12:1"),
 170                 nil,
 171         },
 172         {
 173                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x1},
 174                 "2001:db8::1",
 175                 []byte("2001:db8::1"),
 176                 nil,
 177         },
 178         {
 179                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0x1, 0, 0, 0, 0x1, 0, 0, 0, 0x1},
 180                 "2001:db8:0:1:0:1:0:1",
 181                 []byte("2001:db8:0:1:0:1:0:1"),
 182                 nil,
 183         },
 184         {
 185                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0x1, 0, 0, 0, 0x1, 0, 0, 0, 0x1, 0, 0},
 186                 "2001:db8:1:0:1:0:1:0",
 187                 []byte("2001:db8:1:0:1:0:1:0"),
 188                 nil,
 189         },
 190         {
 191                 IP{0x20, 0x1, 0, 0, 0, 0, 0, 0, 0, 0x1, 0, 0, 0, 0, 0, 0x1},
 192                 "2001::1:0:0:1",
 193                 []byte("2001::1:0:0:1"),
 194                 nil,
 195         },
 196         {
 197                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0x1, 0, 0, 0, 0, 0, 0},
 198                 "2001:db8:0:0:1::",
 199                 []byte("2001:db8:0:0:1::"),
 200                 nil,
 201         },
 202         {
 203                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0x1, 0, 0, 0, 0, 0, 0x1},
 204                 "2001:db8::1:0:0:1",
 205                 []byte("2001:db8::1:0:0:1"),
 206                 nil,
 207         },
 208         {
 209                 IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0xa, 0, 0xb, 0, 0xc, 0, 0xd},
 210                 "2001:db8::a:b:c:d",
 211                 []byte("2001:db8::a:b:c:d"),
 212                 nil,
 213         },
 214         {
 215                 IPv6unspecified,
 216                 "::",
 217                 []byte("::"),
 218                 nil,
 219         },
 220
 221         // IP wildcard equivalent address in Dial/Listen API
 222         {
 223                 nil,
 224                 "<nil>",
 225                 nil,
 226                 nil,
 227         },
 228
 229         // Opaque byte sequence
 230         {
 231                 IP{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef},
 232                 "?0123456789abcdef",
 233                 nil,
 234                 &AddrError{Err: "invalid IP address", Addr: "0123456789abcdef"},
 235         },
 236 }
 237
 238 func TestIPString(t *testing.T) {
 239         for _, tt := range ipStringTests {
 240                 if out := tt.in.String(); out != tt.str {
 241                         t.Errorf("IP.String(%v) = %q, want %q", tt.in, out, tt.str)
 242                 }
 243                 if out, err := tt.in.MarshalText(); !bytes.Equal(out, tt.byt) || !reflect.DeepEqual(err, tt.error) {
 244                         t.Errorf("IP.MarshalText(%v) = %v, %v, want %v, %v", tt.in, out, err, tt.byt, tt.error)
 245                 }
 246         }
 247 }
 248
 249 var sink string
 250
 251 func BenchmarkIPString(b *testing.B) {
 252         testHookUninstaller.Do(uninstallTestHooks)
 253
 254         for i := 0; i < b.N; i++ {
 255                 for _, tt := range ipStringTests {
 256                         if tt.in != nil {
 257                                 sink = tt.in.String()
 258                         }
 259                 }
 260         }
 261 }
 262
 263 var ipMaskTests = []struct {
 264         in   IP
 265         mask IPMask
 266         out  IP
 267 }{
 268         {IPv4(192, 168, 1, 127), IPv4Mask(255, 255, 255, 128), IPv4(192, 168, 1, 0)},
 269         {IPv4(192, 168, 1, 127), IPMask(ParseIP("255.255.255.192")), IPv4(192, 168, 1, 64)},
 270         {IPv4(192, 168, 1, 127), IPMask(ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffe0")), IPv4(192, 168, 1, 96)},
 271         {IPv4(192, 168, 1, 127), IPv4Mask(255, 0, 255, 0), IPv4(192, 0, 1, 0)},
 272         {ParseIP("2001:db8::1"), IPMask(ParseIP("ffff:ff80::")), ParseIP("2001:d80::")},
 273         {ParseIP("2001:db8::1"), IPMask(ParseIP("f0f0:0f0f::")), ParseIP("2000:d08::")},
 274 }
 275
 276 func TestIPMask(t *testing.T) {
 277         for _, tt := range ipMaskTests {
 278                 if out := tt.in.Mask(tt.mask); out == nil || !tt.out.Equal(out) {
 279                         t.Errorf("IP(%v).Mask(%v) = %v, want %v", tt.in, tt.mask, out, tt.out)
 280                 }
 281         }
 282 }
 283
 284 var ipMaskStringTests = []struct {
 285         in  IPMask
 286         out string
 287 }{
 288         {IPv4Mask(255, 255, 255, 240), "fffffff0"},
 289         {IPv4Mask(255, 0, 128, 0), "ff008000"},
 290         {IPMask(ParseIP("ffff:ff80::")), "ffffff80000000000000000000000000"},
 291         {IPMask(ParseIP("ef00:ff80::cafe:0")), "ef00ff800000000000000000cafe0000"},
 292         {nil, "<nil>"},
 293 }
 294
 295 func TestIPMaskString(t *testing.T) {
 296         for _, tt := range ipMaskStringTests {
 297                 if out := tt.in.String(); out != tt.out {
 298                         t.Errorf("IPMask.String(%v) = %q, want %q", tt.in, out, tt.out)
 299                 }
 300         }
 301 }
 302
 303 func BenchmarkIPMaskString(b *testing.B) {
 304         testHookUninstaller.Do(uninstallTestHooks)
 305
 306         for i := 0; i < b.N; i++ {
 307                 for _, tt := range ipMaskStringTests {
 308                         sink = tt.in.String()
 309                 }
 310         }
 311 }
 312
 313 var parseCIDRTests = []struct {
 314         in  string
 315         ip  IP
 316         net *IPNet
 317         err error
 318 }{
 319         {"135.104.0.0/32", IPv4(135, 104, 0, 0), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
 320         {"0.0.0.0/24", IPv4(0, 0, 0, 0), &IPNet{IP: IPv4(0, 0, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
 321         {"135.104.0.0/24", IPv4(135, 104, 0, 0), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
 322         {"135.104.0.1/32", IPv4(135, 104, 0, 1), &IPNet{IP: IPv4(135, 104, 0, 1), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
 323         {"135.104.0.1/24", IPv4(135, 104, 0, 1), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
 324         {"::1/128", ParseIP("::1"), &IPNet{IP: ParseIP("::1"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"))}, nil},
 325         {"abcd:2345::/127", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe"))}, nil},
 326         {"abcd:2345::/65", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:8000::"))}, nil},
 327         {"abcd:2345::/64", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff::"))}, nil},
 328         {"abcd:2345::/63", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:fffe::"))}, nil},
 329         {"abcd:2345::/33", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:8000::"))}, nil},
 330         {"abcd:2345::/32", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff::"))}, nil},
 331         {"abcd:2344::/31", ParseIP("abcd:2344::"), &IPNet{IP: ParseIP("abcd:2344::"), Mask: IPMask(ParseIP("ffff:fffe::"))}, nil},
 332         {"abcd:2300::/24", ParseIP("abcd:2300::"), &IPNet{IP: ParseIP("abcd:2300::"), Mask: IPMask(ParseIP("ffff:ff00::"))}, nil},
 333         {"abcd:2345::/24", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2300::"), Mask: IPMask(ParseIP("ffff:ff00::"))}, nil},
 334         {"2001:DB8::/48", ParseIP("2001:DB8::"), &IPNet{IP: ParseIP("2001:DB8::"), Mask: IPMask(ParseIP("ffff:ffff:ffff::"))}, nil},
 335         {"2001:DB8::1/48", ParseIP("2001:DB8::1"), &IPNet{IP: ParseIP("2001:DB8::"), Mask: IPMask(ParseIP("ffff:ffff:ffff::"))}, nil},
 336         {"192.168.1.1/255.255.255.0", nil, nil, &ParseError{Type: "CIDR address", Text: "192.168.1.1/255.255.255.0"}},
 337         {"192.168.1.1/35", nil, nil, &ParseError{Type: "CIDR address", Text: "192.168.1.1/35"}},
 338         {"2001:db8::1/-1", nil, nil, &ParseError{Type: "CIDR address", Text: "2001:db8::1/-1"}},
 339         {"2001:db8::1/-0", nil, nil, &ParseError{Type: "CIDR address", Text: "2001:db8::1/-0"}},
 340         {"-0.0.0.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "-0.0.0.0/32"}},
 341         {"0.-1.0.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.-1.0.0/32"}},
 342         {"0.0.-2.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.-2.0/32"}},
 343         {"0.0.0.-3/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.-3/32"}},
 344         {"0.0.0.0/-0", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.0/-0"}},
 345         {"", nil, nil, &ParseError{Type: "CIDR address", Text: ""}},
 346 }
 347
 348 func TestParseCIDR(t *testing.T) {
 349         for _, tt := range parseCIDRTests {
 350                 ip, net, err := ParseCIDR(tt.in)
 351                 if !reflect.DeepEqual(err, tt.err) {
 352                         t.Errorf("ParseCIDR(%q) = %v, %v; want %v, %v", tt.in, ip, net, tt.ip, tt.net)
 353                 }
 354                 if err == nil && (!tt.ip.Equal(ip) || !tt.net.IP.Equal(net.IP) || !reflect.DeepEqual(net.Mask, tt.net.Mask)) {
 355                         t.Errorf("ParseCIDR(%q) = %v, {%v, %v}; want %v, {%v, %v}", tt.in, ip, net.IP, net.Mask, tt.ip, tt.net.IP, tt.net.Mask)
 356                 }
 357         }
 358 }
 359
 360 var ipNetContainsTests = []struct {
 361         ip  IP
 362         net *IPNet
 363         ok  bool
 364 }{
 365         {IPv4(172, 16, 1, 1), &IPNet{IP: IPv4(172, 16, 0, 0), Mask: CIDRMask(12, 32)}, true},
 366         {IPv4(172, 24, 0, 1), &IPNet{IP: IPv4(172, 16, 0, 0), Mask: CIDRMask(13, 32)}, false},
 367         {IPv4(192, 168, 0, 3), &IPNet{IP: IPv4(192, 168, 0, 0), Mask: IPv4Mask(0, 0, 255, 252)}, true},
 368         {IPv4(192, 168, 0, 4), &IPNet{IP: IPv4(192, 168, 0, 0), Mask: IPv4Mask(0, 255, 0, 252)}, false},
 369         {ParseIP("2001:db8:1:2::1"), &IPNet{IP: ParseIP("2001:db8:1::"), Mask: CIDRMask(47, 128)}, true},
 370         {ParseIP("2001:db8:1:2::1"), &IPNet{IP: ParseIP("2001:db8:2::"), Mask: CIDRMask(47, 128)}, false},
 371         {ParseIP("2001:db8:1:2::1"), &IPNet{IP: ParseIP("2001:db8:1::"), Mask: IPMask(ParseIP("ffff:0:ffff::"))}, true},
 372         {ParseIP("2001:db8:1:2::1"), &IPNet{IP: ParseIP("2001:db8:1::"), Mask: IPMask(ParseIP("0:0:0:ffff::"))}, false},
 373 }
 374
 375 func TestIPNetContains(t *testing.T) {
 376         for _, tt := range ipNetContainsTests {
 377                 if ok := tt.net.Contains(tt.ip); ok != tt.ok {
 378                         t.Errorf("IPNet(%v).Contains(%v) = %v, want %v", tt.net, tt.ip, ok, tt.ok)
 379                 }
 380         }
 381 }
 382
 383 var ipNetStringTests = []struct {
 384         in  *IPNet
 385         out string
 386 }{
 387         {&IPNet{IP: IPv4(192, 168, 1, 0), Mask: CIDRMask(26, 32)}, "192.168.1.0/26"},
 388         {&IPNet{IP: IPv4(192, 168, 1, 0), Mask: IPv4Mask(255, 0, 255, 0)}, "192.168.1.0/ff00ff00"},
 389         {&IPNet{IP: ParseIP("2001:db8::"), Mask: CIDRMask(55, 128)}, "2001:db8::/55"},
 390         {&IPNet{IP: ParseIP("2001:db8::"), Mask: IPMask(ParseIP("8000:f123:0:cafe::"))}, "2001:db8::/8000f1230000cafe0000000000000000"},
 391 }
 392
 393 func TestIPNetString(t *testing.T) {
 394         for _, tt := range ipNetStringTests {
 395                 if out := tt.in.String(); out != tt.out {
 396                         t.Errorf("IPNet.String(%v) = %q, want %q", tt.in, out, tt.out)
 397                 }
 398         }
 399 }
 400
 401 var cidrMaskTests = []struct {
 402         ones int
 403         bits int
 404         out  IPMask
 405 }{
 406         {0, 32, IPv4Mask(0, 0, 0, 0)},
 407         {12, 32, IPv4Mask(255, 240, 0, 0)},
 408         {24, 32, IPv4Mask(255, 255, 255, 0)},
 409         {32, 32, IPv4Mask(255, 255, 255, 255)},
 410         {0, 128, IPMask{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 411         {4, 128, IPMask{0xf0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 412         {48, 128, IPMask{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 413         {128, 128, IPMask{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}},
 414         {33, 32, nil},
 415         {32, 33, nil},
 416         {-1, 128, nil},
 417         {128, -1, nil},
 418 }
 419
 420 func TestCIDRMask(t *testing.T) {
 421         for _, tt := range cidrMaskTests {
 422                 if out := CIDRMask(tt.ones, tt.bits); !reflect.DeepEqual(out, tt.out) {
 423                         t.Errorf("CIDRMask(%v, %v) = %v, want %v", tt.ones, tt.bits, out, tt.out)
 424                 }
 425         }
 426 }
 427
 428 var (
 429         v4addr         = IP{192, 168, 0, 1}
 430         v4mappedv6addr = IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 192, 168, 0, 1}
 431         v6addr         = IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0x1, 0x23, 0, 0x12, 0, 0x1}
 432         v4mask         = IPMask{255, 255, 255, 0}
 433         v4mappedv6mask = IPMask{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 255, 255, 255, 0}
 434         v6mask         = IPMask{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0}
 435         badaddr        = IP{192, 168, 0}
 436         badmask        = IPMask{255, 255, 0}
 437         v4maskzero     = IPMask{0, 0, 0, 0}
 438 )
 439
 440 var networkNumberAndMaskTests = []struct {
 441         in  IPNet
 442         out IPNet
 443 }{
 444         {IPNet{IP: v4addr, Mask: v4mask}, IPNet{IP: v4addr, Mask: v4mask}},
 445         {IPNet{IP: v4addr, Mask: v4mappedv6mask}, IPNet{IP: v4addr, Mask: v4mask}},
 446         {IPNet{IP: v4mappedv6addr, Mask: v4mappedv6mask}, IPNet{IP: v4addr, Mask: v4mask}},
 447         {IPNet{IP: v4mappedv6addr, Mask: v6mask}, IPNet{IP: v4addr, Mask: v4maskzero}},
 448         {IPNet{IP: v4addr, Mask: v6mask}, IPNet{IP: v4addr, Mask: v4maskzero}},
 449         {IPNet{IP: v6addr, Mask: v6mask}, IPNet{IP: v6addr, Mask: v6mask}},
 450         {IPNet{IP: v6addr, Mask: v4mappedv6mask}, IPNet{IP: v6addr, Mask: v4mappedv6mask}},
 451         {in: IPNet{IP: v6addr, Mask: v4mask}},
 452         {in: IPNet{IP: v4addr, Mask: badmask}},
 453         {in: IPNet{IP: v4mappedv6addr, Mask: badmask}},
 454         {in: IPNet{IP: v6addr, Mask: badmask}},
 455         {in: IPNet{IP: badaddr, Mask: v4mask}},
 456         {in: IPNet{IP: badaddr, Mask: v4mappedv6mask}},
 457         {in: IPNet{IP: badaddr, Mask: v6mask}},
 458         {in: IPNet{IP: badaddr, Mask: badmask}},
 459 }
 460
 461 func TestNetworkNumberAndMask(t *testing.T) {
 462         for _, tt := range networkNumberAndMaskTests {
 463                 ip, m := networkNumberAndMask(&tt.in)
 464                 out := &IPNet{IP: ip, Mask: m}
 465                 if !reflect.DeepEqual(&tt.out, out) {
 466                         t.Errorf("networkNumberAndMask(%v) = %v, want %v", tt.in, out, &tt.out)
 467                 }
 468         }
 469 }
 470
 471 var splitJoinTests = []struct {
 472         host string
 473         port string
 474         join string
 475 }{
 476         {"www.google.com", "80", "www.google.com:80"},
 477         {"127.0.0.1", "1234", "127.0.0.1:1234"},
 478         {"::1", "80", "[::1]:80"},
 479         {"fe80::1%lo0", "80", "[fe80::1%lo0]:80"},
 480         {"localhost%lo0", "80", "[localhost%lo0]:80"},
 481         {"", "0", ":0"},
 482
 483         {"google.com", "https%foo", "google.com:https%foo"}, // Go 1.0 behavior
 484         {"127.0.0.1", "", "127.0.0.1:"},                     // Go 1.0 behavior
 485         {"www.google.com", "", "www.google.com:"},           // Go 1.0 behavior
 486 }
 487
 488 var splitFailureTests = []struct {
 489         hostPort string
 490         err      string
 491 }{
 492         {"www.google.com", "missing port in address"},
 493         {"127.0.0.1", "missing port in address"},
 494         {"[::1]", "missing port in address"},
 495         {"[fe80::1%lo0]", "missing port in address"},
 496         {"[localhost%lo0]", "missing port in address"},
 497         {"localhost%lo0", "missing port in address"},
 498
 499         {"::1", "too many colons in address"},
 500         {"fe80::1%lo0", "too many colons in address"},
 501         {"fe80::1%lo0:80", "too many colons in address"},
 502
 503         {"localhost%lo0:80", "missing brackets in address"},
 504
 505         // Test cases that didn't fail in Go 1.0
 506
 507         {"[foo:bar]", "missing port in address"},
 508         {"[foo:bar]baz", "missing port in address"},
 509         {"[foo]bar:baz", "missing port in address"},
 510
 511         {"[foo]:[bar]:baz", "too many colons in address"},
 512
 513         {"[foo]:[bar]baz", "unexpected '[' in address"},
 514         {"foo[bar]:baz", "unexpected '[' in address"},
 515
 516         {"foo]bar:baz", "unexpected ']' in address"},
 517 }
 518
 519 func TestSplitHostPort(t *testing.T) {
 520         for _, tt := range splitJoinTests {
 521                 if host, port, err := SplitHostPort(tt.join); host != tt.host || port != tt.port || err != nil {
 522                         t.Errorf("SplitHostPort(%q) = %q, %q, %v; want %q, %q, nil", tt.join, host, port, err, tt.host, tt.port)
 523                 }
 524         }
 525         for _, tt := range splitFailureTests {
 526                 if host, port, err := SplitHostPort(tt.hostPort); err == nil {
 527                         t.Errorf("SplitHostPort(%q) should have failed", tt.hostPort)
 528                 } else {
 529                         e := err.(*AddrError)
 530                         if e.Err != tt.err {
 531                                 t.Errorf("SplitHostPort(%q) = _, _, %q; want %q", tt.hostPort, e.Err, tt.err)
 532                         }
 533                         if host != "" || port != "" {
 534                                 t.Errorf("SplitHostPort(%q) = %q, %q, err; want %q, %q, err on failure", tt.hostPort, host, port, "", "")
 535                         }
 536                 }
 537         }
 538 }
 539
 540 func TestJoinHostPort(t *testing.T) {
 541         for _, tt := range splitJoinTests {
 542                 if join := JoinHostPort(tt.host, tt.port); join != tt.join {
 543                         t.Errorf("JoinHostPort(%q, %q) = %q; want %q", tt.host, tt.port, join, tt.join)
 544                 }
 545         }
 546 }
 547
 548 var ipAddrFamilyTests = []struct {
 549         in  IP
 550         af4 bool
 551         af6 bool
 552 }{
 553         {IPv4bcast, true, false},
 554         {IPv4allsys, true, false},
 555         {IPv4allrouter, true, false},
 556         {IPv4zero, true, false},
 557         {IPv4(224, 0, 0, 1), true, false},
 558         {IPv4(127, 0, 0, 1), true, false},
 559         {IPv4(240, 0, 0, 1), true, false},
 560         {IPv6unspecified, false, true},
 561         {IPv6loopback, false, true},
 562         {IPv6interfacelocalallnodes, false, true},
 563         {IPv6linklocalallnodes, false, true},
 564         {IPv6linklocalallrouters, false, true},
 565         {ParseIP("ff05::a:b:c:d"), false, true},
 566         {ParseIP("fe80::1:2:3:4"), false, true},
 567         {ParseIP("2001:db8::123:12:1"), false, true},
 568 }
 569
 570 func TestIPAddrFamily(t *testing.T) {
 571         for _, tt := range ipAddrFamilyTests {
 572                 if af := tt.in.To4() != nil; af != tt.af4 {
 573                         t.Errorf("verifying IPv4 address family for %q = %v, want %v", tt.in, af, tt.af4)
 574                 }
 575                 if af := len(tt.in) == IPv6len && tt.in.To4() == nil; af != tt.af6 {
 576                         t.Errorf("verifying IPv6 address family for %q = %v, want %v", tt.in, af, tt.af6)
 577                 }
 578         }
 579 }
 580
 581 var ipAddrScopeTests = []struct {
 582         scope func(IP) bool
 583         in    IP
 584         ok    bool
 585 }{
 586         {IP.IsUnspecified, IPv4zero, true},
 587         {IP.IsUnspecified, IPv4(127, 0, 0, 1), false},
 588         {IP.IsUnspecified, IPv6unspecified, true},
 589         {IP.IsUnspecified, IPv6interfacelocalallnodes, false},
 590         {IP.IsUnspecified, nil, false},
 591         {IP.IsLoopback, IPv4(127, 0, 0, 1), true},
 592         {IP.IsLoopback, IPv4(127, 255, 255, 254), true},
 593         {IP.IsLoopback, IPv4(128, 1, 2, 3), false},
 594         {IP.IsLoopback, IPv6loopback, true},
 595         {IP.IsLoopback, IPv6linklocalallrouters, false},
 596         {IP.IsLoopback, nil, false},
 597         {IP.IsMulticast, IPv4(224, 0, 0, 0), true},
 598         {IP.IsMulticast, IPv4(239, 0, 0, 0), true},
 599         {IP.IsMulticast, IPv4(240, 0, 0, 0), false},
 600         {IP.IsMulticast, IPv6linklocalallnodes, true},
 601         {IP.IsMulticast, IP{0xff, 0x05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, true},
 602         {IP.IsMulticast, IP{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, false},
 603         {IP.IsMulticast, nil, false},
 604         {IP.IsInterfaceLocalMulticast, IPv4(224, 0, 0, 0), false},
 605         {IP.IsInterfaceLocalMulticast, IPv4(0xff, 0x01, 0, 0), false},
 606         {IP.IsInterfaceLocalMulticast, IPv6interfacelocalallnodes, true},
 607         {IP.IsInterfaceLocalMulticast, nil, false},
 608         {IP.IsLinkLocalMulticast, IPv4(224, 0, 0, 0), true},
 609         {IP.IsLinkLocalMulticast, IPv4(239, 0, 0, 0), false},
 610         {IP.IsLinkLocalMulticast, IPv4(0xff, 0x02, 0, 0), false},
 611         {IP.IsLinkLocalMulticast, IPv6linklocalallrouters, true},
 612         {IP.IsLinkLocalMulticast, IP{0xff, 0x05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, false},
 613         {IP.IsLinkLocalMulticast, nil, false},
 614         {IP.IsLinkLocalUnicast, IPv4(169, 254, 0, 0), true},
 615         {IP.IsLinkLocalUnicast, IPv4(169, 255, 0, 0), false},
 616         {IP.IsLinkLocalUnicast, IPv4(0xfe, 0x80, 0, 0), false},
 617         {IP.IsLinkLocalUnicast, IP{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, true},
 618         {IP.IsLinkLocalUnicast, IP{0xfe, 0xc0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, false},
 619         {IP.IsLinkLocalUnicast, nil, false},
 620         {IP.IsGlobalUnicast, IPv4(240, 0, 0, 0), true},
 621         {IP.IsGlobalUnicast, IPv4(232, 0, 0, 0), false},
 622         {IP.IsGlobalUnicast, IPv4(169, 254, 0, 0), false},
 623         {IP.IsGlobalUnicast, IPv4bcast, false},
 624         {IP.IsGlobalUnicast, IP{0x20, 0x1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0x1, 0x23, 0, 0x12, 0, 0x1}, true},
 625         {IP.IsGlobalUnicast, IP{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, false},
 626         {IP.IsGlobalUnicast, IP{0xff, 0x05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, false},
 627         {IP.IsGlobalUnicast, nil, false},
 628 }
 629
 630 func name(f interface{}) string {
 631         return runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
 632 }
 633
 634 func TestIPAddrScope(t *testing.T) {
 635         for _, tt := range ipAddrScopeTests {
 636                 if ok := tt.scope(tt.in); ok != tt.ok {
 637                         t.Errorf("%s(%q) = %v, want %v", name(tt.scope), tt.in, ok, tt.ok)
 638                 }
 639                 ip := tt.in.To4()
 640                 if ip == nil {
 641                         continue
 642                 }
 643                 if ok := tt.scope(ip); ok != tt.ok {
 644                         t.Errorf("%s(%q) = %v, want %v", name(tt.scope), ip, ok, tt.ok)
 645                 }
 646         }
 647 }