summaryrefslogtreecommitdiffstats
path: root/test/socket/test_addrinfo.rb
blob: 4a0806066905cff719883cef1f496e99948c7253 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
begin
  require "socket"
rescue LoadError
end

require "test/unit"

class TestSocketAddrinfo < Test::Unit::TestCase
  HAS_UNIXSOCKET = defined?(UNIXSocket) && /cygwin/ !~ RUBY_PLATFORM

  def tcp_unspecified_to_loopback(addrinfo)
    if addrinfo.ipv4? && addrinfo.ip_address == "0.0.0.0"
      Addrinfo.tcp("127.0.0.1", addrinfo.ip_port)
    elsif addrinfo.ipv6? && addrinfo.ipv6_unspecified?
      Addrinfo.tcp("::1", addrinfo.ip_port)
    elsif addrinfo.ipv6? && (ai = addrinfo.ipv6_to_ipv4) && ai.ip_address == "0.0.0.0"
      Addrinfo.tcp("127.0.0.1", addrinfo.ip_port)
    else
      addrinfo
    end
  end

  def test_addrinfo_ip
    ai = Addrinfo.ip("127.0.0.1")
    assert_equal([0, "127.0.0.1"], Socket.unpack_sockaddr_in(ai))
    assert_equal(Socket::AF_INET, ai.afamily)
    assert_equal(Socket::PF_INET, ai.pfamily)
    assert_equal(0, ai.socktype)
    assert_equal(0, ai.protocol)
  end

  def test_addrinfo_tcp
    ai = Addrinfo.tcp("127.0.0.1", 80)
    assert_equal([80, "127.0.0.1"], Socket.unpack_sockaddr_in(ai))
    assert_equal(Socket::AF_INET, ai.afamily)
    assert_equal(Socket::PF_INET, ai.pfamily)
    assert_equal(Socket::SOCK_STREAM, ai.socktype)
    assert_includes([0, Socket::IPPROTO_TCP], ai.protocol)
  end

  def test_addrinfo_udp
    ai = Addrinfo.udp("127.0.0.1", 80)
    assert_equal([80, "127.0.0.1"], Socket.unpack_sockaddr_in(ai))
    assert_equal(Socket::AF_INET, ai.afamily)
    assert_equal(Socket::PF_INET, ai.pfamily)
    assert_equal(Socket::SOCK_DGRAM, ai.socktype)
    assert_includes([0, Socket::IPPROTO_UDP], ai.protocol)
  end

  def test_addrinfo_ip_unpack
    ai = Addrinfo.tcp("127.0.0.1", 80)
    assert_equal(["127.0.0.1", 80], ai.ip_unpack)
    assert_equal("127.0.0.1", ai.ip_address)
    assert_equal(80, ai.ip_port)
  end

  def test_addrinfo_inspect_sockaddr
    ai = Addrinfo.tcp("127.0.0.1", 80)
    assert_equal("127.0.0.1:80", ai.inspect_sockaddr)
  end

  def test_addrinfo_new_inet
    ai = Addrinfo.new(["AF_INET", 46102, "localhost.localdomain", "127.0.0.2"])
    assert_equal([46102, "127.0.0.2"], Socket.unpack_sockaddr_in(ai))
    assert_equal(Socket::AF_INET, ai.afamily)
    assert_equal(Socket::PF_INET, ai.pfamily)
    assert_equal(0, ai.socktype)
    assert_equal(0, ai.protocol)
  end

  def test_addrinfo_predicates
    ipv4_ai = Addrinfo.new(Socket.sockaddr_in(80, "192.168.0.1"))
    assert(ipv4_ai.ip?)
    assert(ipv4_ai.ipv4?)
    assert(!ipv4_ai.ipv6?)
    assert(!ipv4_ai.unix?)
  end

  def test_ipv4_address_predicates
    list = [
      [:ipv4_private?, "10.0.0.0", "10.255.255.255",
                       "172.16.0.0", "172.31.255.255",
                       "192.168.0.0", "192.168.255.255"],
      [:ipv4_loopback?, "127.0.0.1", "127.0.0.0", "127.255.255.255"],
      [:ipv4_multicast?, "224.0.0.0", "224.255.255.255"]
    ]
    list.each {|meth, *addrs|
      addrs.each {|addr|
        assert(Addrinfo.ip(addr).send(meth), "Addrinfo.ip(#{addr.inspect}).#{meth}")
        list.each {|meth2,|
          next if meth == meth2
          assert(!Addrinfo.ip(addr).send(meth2), "!Addrinfo.ip(#{addr.inspect}).#{meth2}")
        }
      }
    }
  end

  def test_basicsocket_send
    s1 = Socket.new(:INET, :DGRAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    sa = s1.getsockname
    ai = Addrinfo.new(sa)
    s2 = Socket.new(:INET, :DGRAM, 0)
    s2.send("test-basicsocket-send", 0, ai)
    assert_equal("test-basicsocket-send", s1.recv(100))
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
  end

  def test_udpsocket_send
    s1 = UDPSocket.new
    s1.bind("127.0.0.1", 0)
    ai = Addrinfo.new(s1.getsockname)
    s2 = UDPSocket.new
    s2.send("test-udp-send", 0, ai)
    assert_equal("test-udp-send", s1.recv(100))
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
  end

  def test_socket_bind
    s1 = Socket.new(:INET, :DGRAM, 0)
    sa = Socket.sockaddr_in(0, "127.0.0.1")
    ai = Addrinfo.new(sa)
    s1.bind(ai)
    s2 = UDPSocket.new
    s2.send("test-socket-bind", 0, s1.getsockname)
    assert_equal("test-socket-bind", s1.recv(100))
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
  end

  def test_socket_connect
    s1 = Socket.new(:INET, :STREAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s1.listen(5)
    ai = Addrinfo.new(s1.getsockname)
    s2 = Socket.new(:INET, :STREAM, 0)
    s2.connect(ai)
    s3, sender_addr = s1.accept
    s2.send("test-socket-connect", 0)
    assert_equal("test-socket-connect", s3.recv(100))
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
    s3.close if s3 && !s3.closed?
  end

  def test_socket_connect_nonblock
    s1 = Socket.new(:INET, :STREAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s1.listen(5)
    ai = Addrinfo.new(s1.getsockname)
    s2 = Socket.new(:INET, :STREAM, 0)
    begin
      s2.connect_nonblock(ai)
    rescue IO::WaitWritable
      IO.select(nil, [s2])
      begin
        s2.connect_nonblock(ai)
      rescue Errno::EISCONN
      end
    end
    s3, sender_addr = s1.accept
    s2.send("test-socket-connect-nonblock", 0)
    assert_equal("test-socket-connect-nonblock", s3.recv(100))
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
    s3.close if s3 && !s3.closed?
  end

  def test_socket_getnameinfo
     ai = Addrinfo.udp("127.0.0.1", 8888)
     assert_equal(["127.0.0.1", "8888"], Socket.getnameinfo(ai, Socket::NI_NUMERICHOST|Socket::NI_NUMERICSERV))
  end

  def test_basicsocket_local_address
    s1 = Socket.new(:INET, :DGRAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    e = Socket.unpack_sockaddr_in(s1.getsockname)
    a = Socket.unpack_sockaddr_in(s1.local_address.to_sockaddr)
    assert_equal(e, a)
    assert_equal(Socket::AF_INET, s1.local_address.afamily)
    assert_equal(Socket::PF_INET, s1.local_address.pfamily)
    assert_equal(Socket::SOCK_DGRAM, s1.local_address.socktype)
  ensure
    s1.close if s1 && !s1.closed?
  end

  def test_basicsocket_remote_address
    s1 = TCPServer.new("127.0.0.1", 0)
    s2 = Socket.new(:INET, :STREAM, 0)
    s2.connect(s1.getsockname)
    s3, _ = s1.accept
    e = Socket.unpack_sockaddr_in(s2.getsockname)
    a = Socket.unpack_sockaddr_in(s3.remote_address.to_sockaddr)
    assert_equal(e, a)
    assert_equal(Socket::AF_INET, s3.remote_address.afamily)
    assert_equal(Socket::PF_INET, s3.remote_address.pfamily)
    assert_equal(Socket::SOCK_STREAM, s3.remote_address.socktype)
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
    s3.close if s3 && !s3.closed?
  end

  def test_socket_accept
    serv = Socket.new(:INET, :STREAM, 0)
    serv.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    serv.listen(5)
    c = Socket.new(:INET, :STREAM, 0)
    c.connect(serv.local_address)
    ret = serv.accept
    s, ai = ret
    assert_kind_of(Array, ret)
    assert_equal(2, ret.length)
    assert_kind_of(Addrinfo, ai)
    e = Socket.unpack_sockaddr_in(c.getsockname)
    a = Socket.unpack_sockaddr_in(ai.to_sockaddr)
    assert_equal(e, a)
  ensure
    serv.close if serv && !serv.closed?
    s.close if s && !s.closed?
    c.close if c && !c.closed?
  end

  def test_socket_accept_nonblock
    serv = Socket.new(:INET, :STREAM, 0)
    serv.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    serv.listen(5)
    c = Socket.new(:INET, :STREAM, 0)
    c.connect(serv.local_address)
    begin
      ret = serv.accept_nonblock
    rescue IO::WaitReadable, Errno::EINTR
      IO.select([serv])
      retry
    end
    s, ai = ret
    assert_kind_of(Array, ret)
    assert_equal(2, ret.length)
    assert_kind_of(Addrinfo, ai)
    e = Socket.unpack_sockaddr_in(c.getsockname)
    a = Socket.unpack_sockaddr_in(ai.to_sockaddr)
    assert_equal(e, a)
  ensure
    serv.close if serv && !serv.closed?
    s.close if s && !s.closed?
    c.close if c && !c.closed?
  end

  def test_socket_sysaccept
    serv = Socket.new(:INET, :STREAM, 0)
    serv.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    serv.listen(5)
    c = Socket.new(:INET, :STREAM, 0)
    c.connect(serv.local_address)
    ret = serv.sysaccept
    fd, ai = ret
    s = IO.new(fd)
    assert_kind_of(Array, ret)
    assert_equal(2, ret.length)
    assert_kind_of(Addrinfo, ai)
    e = Socket.unpack_sockaddr_in(c.getsockname)
    a = Socket.unpack_sockaddr_in(ai.to_sockaddr)
    assert_equal(e, a)
  ensure
    serv.close if serv && !serv.closed?
    s.close if s && !s.closed?
    c.close if c && !c.closed?
  end

  def test_socket_recvfrom
    s1 = Socket.new(:INET, :DGRAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s2 = Socket.new(:INET, :DGRAM, 0)
    s2.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s2.send("test-socket-recvfrom", 0, s1.getsockname)
    data, ai = s1.recvfrom(100)
    assert_equal("test-socket-recvfrom", data)
    assert_kind_of(Addrinfo, ai)
    e = Socket.unpack_sockaddr_in(s2.getsockname)
    a = Socket.unpack_sockaddr_in(ai.to_sockaddr)
    assert_equal(e, a)
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
  end

  def test_socket_recvfrom_nonblock
    s1 = Socket.new(:INET, :DGRAM, 0)
    s1.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s2 = Socket.new(:INET, :DGRAM, 0)
    s2.bind(Socket.sockaddr_in(0, "127.0.0.1"))
    s2.send("test-socket-recvfrom", 0, s1.getsockname)
    begin
      data, ai = s1.recvfrom_nonblock(100)
    rescue IO::WaitReadable
      IO.select([s1])
      retry
    end
    assert_equal("test-socket-recvfrom", data)
    assert_kind_of(Addrinfo, ai)
    e = Socket.unpack_sockaddr_in(s2.getsockname)
    a = Socket.unpack_sockaddr_in(ai.to_sockaddr)
    assert_equal(e, a)
  ensure
    s1.close if s1 && !s1.closed?
    s2.close if s2 && !s2.closed?
  end

  def test_family_addrinfo
    ai = Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("127.0.0.1", 80)
    assert_equal(["127.0.0.1", 80], ai.ip_unpack)
    assert_equal(Socket::SOCK_STREAM, ai.socktype)
    ai = Addrinfo.unix("/tmp/sock").family_addrinfo("/tmp/sock2")
    assert_equal("/tmp/sock2", ai.unix_path)
    assert_equal(Socket::SOCK_STREAM, ai.socktype)
    assert_raise(SocketError) { Addrinfo.tcp("0.0.0.0", 4649).family_addrinfo("::1", 80) }
  end

  def random_port
    # IANA suggests dynamic port for 49152 to 65535
    # http://www.iana.org/assignments/port-numbers
    49152 + rand(65535-49152+1)
  end

  def test_connect_from
    TCPServer.open("0.0.0.0", 0) {|serv|
      serv_ai = Addrinfo.new(serv.getsockname, :INET, :STREAM)
      serv_ai = tcp_unspecified_to_loopback(serv_ai)
      port = random_port
      begin
        serv_ai.connect_from("0.0.0.0", port) {|s1|
          s2 = serv.accept
          begin
            assert_equal(port, s2.remote_address.ip_port)
          ensure
            s2.close
          end
        }
      rescue Errno::EADDRINUSE
        # not test failure
      end
    }
  end

  def test_connect_to
    TCPServer.open("0.0.0.0", 0) {|serv|
      serv_ai = Addrinfo.new(serv.getsockname, :INET, :STREAM)
      serv_ai = tcp_unspecified_to_loopback(serv_ai)
      port = random_port
      client_ai = Addrinfo.tcp("0.0.0.0", port)
      begin
        client_ai.connect_to(*serv_ai.ip_unpack) {|s1|
          s2 = serv.accept
          begin
            assert_equal(port, s2.remote_address.ip_port)
          ensure
            s2.close
          end
        }
      rescue Errno::EADDRINUSE
        # not test failure
      end
    }
  end

  def test_connect
    TCPServer.open("0.0.0.0", 0) {|serv|
      serv_ai = Addrinfo.new(serv.getsockname, :INET, :STREAM)
      serv_ai = tcp_unspecified_to_loopback(serv_ai)
      begin
        serv_ai.connect {|s1|
          s2 = serv.accept
          begin
            assert_equal(s1.local_address.ip_unpack, s2.remote_address.ip_unpack)
            assert_equal(s2.local_address.ip_unpack, s1.remote_address.ip_unpack)
          ensure
            s2.close
          end
        }
      rescue Errno::EADDRINUSE
        # not test failure
      end
    }
  end

  def test_bind
    port = random_port
    client_ai = Addrinfo.tcp("0.0.0.0", port)
    begin
      client_ai.bind {|s|
        assert_equal(port, s.local_address.ip_port)
      }
    rescue Errno::EADDRINUSE
      # not test failure
    end
  end

  def test_listen
    port = random_port
    client_ai = Addrinfo.tcp("0.0.0.0", port)
    begin
      client_ai.listen {|serv|
        assert_equal(port, serv.local_address.ip_port)
        serv_addr, serv_port = serv.local_address.ip_unpack
        case serv_addr
	when "0.0.0.0" then serv_addr = "127.0.0.1"
	end
        TCPSocket.open(serv_addr, serv_port) {|s1|
          s2, addr = serv.accept
          begin
            assert_equal(s1.local_address.ip_unpack, addr.ip_unpack)
          ensure
            s2.close
          end
        }
      }
    rescue Errno::EADDRINUSE
      # not test failure
    end
  end

  def test_s_foreach
    Addrinfo.foreach(nil, 80, nil, :STREAM) {|ai|
      assert_kind_of(Addrinfo, ai)
    }
  end

  def test_marshal
    ai1 = Addrinfo.tcp("127.0.0.1", 80)
    ai2 = Marshal.load(Marshal.dump(ai1))
    assert_equal(ai1.afamily, ai2.afamily)
    assert_equal(ai1.ip_unpack, ai2.ip_unpack)
    assert_equal(ai1.pfamily, ai2.pfamily)
    assert_equal(ai1.socktype, ai2.socktype)
    assert_equal(ai1.protocol, ai2.protocol)
    assert_equal(ai1.canonname, ai2.canonname)
  end

  if Socket.const_defined?("AF_INET6")

    def test_addrinfo_new_inet6
      ai = Addrinfo.new(["AF_INET6", 42304, "ip6-localhost", "::1"])
      assert_equal([42304, "::1"], Socket.unpack_sockaddr_in(ai))
      assert_equal(Socket::AF_INET6, ai.afamily)
      assert_equal(Socket::PF_INET6, ai.pfamily)
      assert_equal(0, ai.socktype)
      assert_equal(0, ai.protocol)
    end

    def test_addrinfo_ip_unpack_inet6
      ai = Addrinfo.tcp("::1", 80)
      assert_equal(["::1", 80], ai.ip_unpack)
      assert_equal("::1", ai.ip_address)
      assert_equal(80, ai.ip_port)
    end

    def test_addrinfo_inspect_sockaddr_inet6
      ai = Addrinfo.tcp("::1", 80)
      assert_equal("[::1]:80", ai.inspect_sockaddr)
    end

    def test_marshal_inet6
      ai1 = Addrinfo.tcp("::1", 80)
      ai2 = Marshal.load(Marshal.dump(ai1))
      assert_equal(ai1.afamily, ai2.afamily)
      assert_equal(ai1.ip_unpack, ai2.ip_unpack)
      assert_equal(ai1.pfamily, ai2.pfamily)
      assert_equal(ai1.socktype, ai2.socktype)
      assert_equal(ai1.protocol, ai2.protocol)
      assert_equal(ai1.canonname, ai2.canonname)
    end

    def ipv6(str)
      Addrinfo.getaddrinfo(str, nil, :INET6, :DGRAM).fetch(0)
    end

    def test_ipv6_address_predicates
      list = [
        [:ipv6_unspecified?, "::"],
        [:ipv6_loopback?, "::1"],
        [:ipv6_v4compat?, "::0.0.0.2", "::255.255.255.255"],
        [:ipv6_v4mapped?, "::ffff:0.0.0.0", "::ffff:255.255.255.255"],
        [:ipv6_linklocal?, "fe80::", "febf::"],
        [:ipv6_sitelocal?, "fec0::", "feef::"],
        [:ipv6_multicast?, "ff00::", "ffff::"]
      ]
      mlist = [
        [:ipv6_mc_nodelocal?, "ff01::", "ff11::"],
        [:ipv6_mc_linklocal?, "ff02::", "ff12::"],
        [:ipv6_mc_sitelocal?, "ff05::", "ff15::"],
        [:ipv6_mc_orglocal?, "ff08::", "ff18::"],
        [:ipv6_mc_global?, "ff0e::", "ff1e::"]
      ]
      list.each {|meth, *addrs|
        addrs.each {|addr|
          addr_exp = "Addrinfo.getaddrinfo(#{addr.inspect}, nil, :INET6, :DGRAM).fetch(0)"
	  if meth == :ipv6_v4compat? || meth == :ipv6_v4mapped?
	    # MacOS X returns IPv4 address for ::ffff:1.2.3.4 and ::1.2.3.4.
            # Solaris returns IPv4 address for ::ffff:1.2.3.4.
	    ai = ipv6(addr)
	    assert(ai.ipv4? || ai.send(meth), "ai=#{addr_exp}; ai.ipv4? || .#{meth}")
	  else
	    assert(ipv6(addr).send(meth), "#{addr_exp}.#{meth}")
            assert_equal(addr, ipv6(addr).ip_address)
	  end
          list.each {|meth2,|
            next if meth == meth2
            assert(!ipv6(addr).send(meth2), "!#{addr_exp}.#{meth2}")
          }
        }
      }
      mlist.each {|meth, *addrs|
        addrs.each {|addr|
          addr_exp = "Addrinfo.getaddrinfo(#{addr.inspect}, nil, :INET6, :DGRAM).fetch(0)"
          assert(ipv6(addr).send(meth), "#{addr_exp}.#{meth}")
          assert(ipv6(addr).ipv6_multicast?, "#{addr_exp}.ipv6_multicast?")
          mlist.each {|meth2,|
            next if meth == meth2
            assert(!ipv6(addr).send(meth2), "!#{addr_exp}.#{meth2}")
          }
          list.each {|meth2,|
            next if :ipv6_multicast? == meth2
            assert(!ipv6(addr).send(meth2), "!#{addr_exp}.#{meth2}")
          }
        }
      }
    end

    def test_ipv6_to_ipv4
      ai = Addrinfo.ip("::192.0.2.3")
      ai = ai.ipv6_to_ipv4 if !ai.ipv4?
      assert(ai.ipv4?)
      assert_equal("192.0.2.3", ai.ip_address)

      ai = Addrinfo.ip("::ffff:192.0.2.3")
      ai = ai.ipv6_to_ipv4 if !ai.ipv4?
      assert(ai.ipv4?)
      assert_equal("192.0.2.3", ai.ip_address)

      assert_nil(Addrinfo.ip("::1").ipv6_to_ipv4)
      assert_nil(Addrinfo.ip("192.0.2.3").ipv6_to_ipv4)
      if HAS_UNIXSOCKET
        assert_nil(Addrinfo.unix("/tmp/sock").ipv6_to_ipv4)
      end
    end
  end

  if HAS_UNIXSOCKET

    def test_addrinfo_unix
      ai = Addrinfo.unix("/tmp/sock")
      assert_equal("/tmp/sock", Socket.unpack_sockaddr_un(ai))
      assert_equal(Socket::AF_UNIX, ai.afamily)
      assert_equal(Socket::PF_UNIX, ai.pfamily)
      assert_equal(Socket::SOCK_STREAM, ai.socktype)
      assert_equal(0, ai.protocol)
    end

    def test_addrinfo_unix_dgram
      ai = Addrinfo.unix("/tmp/sock", :DGRAM)
      assert_equal("/tmp/sock", Socket.unpack_sockaddr_un(ai))
      assert_equal(Socket::AF_UNIX, ai.afamily)
      assert_equal(Socket::PF_UNIX, ai.pfamily)
      assert_equal(Socket::SOCK_DGRAM, ai.socktype)
      assert_equal(0, ai.protocol)
    end

    def test_addrinfo_unix_path
      ai = Addrinfo.unix("/tmp/sock1")
      assert_equal("/tmp/sock1", ai.unix_path)
    end

    def test_addrinfo_inspect_sockaddr_unix
      ai = Addrinfo.unix("/tmp/test_addrinfo_inspect_sockaddr_unix")
      assert_equal("/tmp/test_addrinfo_inspect_sockaddr_unix", ai.inspect_sockaddr)
    end

    def test_addrinfo_new_unix
      ai = Addrinfo.new(["AF_UNIX", "/tmp/sock"])
      assert_equal("/tmp/sock", Socket.unpack_sockaddr_un(ai))
      assert_equal(Socket::AF_UNIX, ai.afamily)
      assert_equal(Socket::PF_UNIX, ai.pfamily)
      assert_equal(Socket::SOCK_STREAM, ai.socktype) # UNIXSocket/UNIXServer is SOCK_STREAM only.
      assert_equal(0, ai.protocol)
    end

    def test_addrinfo_predicates_unix
      unix_ai = Addrinfo.new(Socket.sockaddr_un("/tmp/sososo"))
      assert(!unix_ai.ip?)
      assert(!unix_ai.ipv4?)
      assert(!unix_ai.ipv6?)
      assert(unix_ai.unix?)
    end

    def test_marshal_unix
      ai1 = Addrinfo.unix("/var/tmp/sock")
      ai2 = Marshal.load(Marshal.dump(ai1))
      assert_equal(ai1.afamily, ai2.afamily)
      assert_equal(ai1.unix_path, ai2.unix_path)
      assert_equal(ai1.pfamily, ai2.pfamily)
      assert_equal(ai1.socktype, ai2.socktype)
      assert_equal(ai1.protocol, ai2.protocol)
      assert_equal(ai1.canonname, ai2.canonname)
    end

  end
end