Source file
src/net/udpsock_test.go
Documentation: net
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7
8 package net
9
10 import (
11 "errors"
12 "internal/testenv"
13 "os"
14 "reflect"
15 "runtime"
16 "testing"
17 "time"
18 )
19
20 func BenchmarkUDP6LinkLocalUnicast(b *testing.B) {
21 testHookUninstaller.Do(uninstallTestHooks)
22
23 if !supportsIPv6() {
24 b.Skip("IPv6 is not supported")
25 }
26 ifi := loopbackInterface()
27 if ifi == nil {
28 b.Skip("loopback interface not found")
29 }
30 lla := ipv6LinkLocalUnicastAddr(ifi)
31 if lla == "" {
32 b.Skip("IPv6 link-local unicast address not found")
33 }
34
35 c1, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
36 if err != nil {
37 b.Fatal(err)
38 }
39 defer c1.Close()
40 c2, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
41 if err != nil {
42 b.Fatal(err)
43 }
44 defer c2.Close()
45
46 var buf [1]byte
47 for i := 0; i < b.N; i++ {
48 if _, err := c1.WriteTo(buf[:], c2.LocalAddr()); err != nil {
49 b.Fatal(err)
50 }
51 if _, _, err := c2.ReadFrom(buf[:]); err != nil {
52 b.Fatal(err)
53 }
54 }
55 }
56
57 type resolveUDPAddrTest struct {
58 network string
59 litAddrOrName string
60 addr *UDPAddr
61 err error
62 }
63
64 var resolveUDPAddrTests = []resolveUDPAddrTest{
65 {"udp", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil},
66 {"udp4", "127.0.0.1:65535", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil},
67
68 {"udp", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil},
69 {"udp6", "[::1]:65535", &UDPAddr{IP: ParseIP("::1"), Port: 65535}, nil},
70
71 {"udp", "[::1%en0]:1", &UDPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil},
72 {"udp6", "[::1%911]:2", &UDPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil},
73
74 {"", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil},
75 {"", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil},
76
77 {"udp", ":12345", &UDPAddr{Port: 12345}, nil},
78
79 {"http", "127.0.0.1:0", nil, UnknownNetworkError("http")},
80
81 {"udp", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
82 {"udp", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 53}, nil},
83 {"udp", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
84 {"udp4", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
85 {"udp4", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
86 {"udp6", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
87
88 {"udp4", "[2001:db8::1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}},
89 {"udp6", "127.0.0.1:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}},
90 {"udp6", "[::ffff:127.0.0.1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}},
91 }
92
93 func TestResolveUDPAddr(t *testing.T) {
94 origTestHookLookupIP := testHookLookupIP
95 defer func() { testHookLookupIP = origTestHookLookupIP }()
96 testHookLookupIP = lookupLocalhost
97
98 for _, tt := range resolveUDPAddrTests {
99 addr, err := ResolveUDPAddr(tt.network, tt.litAddrOrName)
100 if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) {
101 t.Errorf("ResolveUDPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err)
102 continue
103 }
104 if err == nil {
105 addr2, err := ResolveUDPAddr(addr.Network(), addr.String())
106 if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err {
107 t.Errorf("(%q, %q): ResolveUDPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr.Network(), addr.String(), addr2, err, tt.addr, tt.err)
108 }
109 }
110 }
111 }
112
113 func TestWriteToUDP(t *testing.T) {
114 switch runtime.GOOS {
115 case "plan9":
116 t.Skipf("not supported on %s", runtime.GOOS)
117 }
118
119 c, err := ListenPacket("udp", "127.0.0.1:0")
120 if err != nil {
121 t.Fatal(err)
122 }
123 defer c.Close()
124
125 testWriteToConn(t, c.LocalAddr().String())
126 testWriteToPacketConn(t, c.LocalAddr().String())
127 }
128
129 func testWriteToConn(t *testing.T, raddr string) {
130 c, err := Dial("udp", raddr)
131 if err != nil {
132 t.Fatal(err)
133 }
134 defer c.Close()
135
136 ra, err := ResolveUDPAddr("udp", raddr)
137 if err != nil {
138 t.Fatal(err)
139 }
140
141 b := []byte("CONNECTED-MODE SOCKET")
142 _, err = c.(*UDPConn).WriteToUDP(b, ra)
143 if err == nil {
144 t.Fatal("should fail")
145 }
146 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
147 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
148 }
149 _, err = c.(*UDPConn).WriteTo(b, ra)
150 if err == nil {
151 t.Fatal("should fail")
152 }
153 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
154 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
155 }
156 _, err = c.Write(b)
157 if err != nil {
158 t.Fatal(err)
159 }
160 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra)
161 if err == nil {
162 t.Fatal("should fail")
163 }
164 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
165 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
166 }
167 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil)
168 if err != nil {
169 t.Fatal(err)
170 }
171 }
172
173 func testWriteToPacketConn(t *testing.T, raddr string) {
174 c, err := ListenPacket("udp", "127.0.0.1:0")
175 if err != nil {
176 t.Fatal(err)
177 }
178 defer c.Close()
179
180 ra, err := ResolveUDPAddr("udp", raddr)
181 if err != nil {
182 t.Fatal(err)
183 }
184
185 b := []byte("UNCONNECTED-MODE SOCKET")
186 _, err = c.(*UDPConn).WriteToUDP(b, ra)
187 if err != nil {
188 t.Fatal(err)
189 }
190 _, err = c.WriteTo(b, ra)
191 if err != nil {
192 t.Fatal(err)
193 }
194 _, err = c.(*UDPConn).Write(b)
195 if err == nil {
196 t.Fatal("should fail")
197 }
198 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil)
199 if err == nil {
200 t.Fatal("should fail")
201 }
202 if err != nil && err.(*OpError).Err != errMissingAddress {
203 t.Fatalf("should fail as errMissingAddress: %v", err)
204 }
205 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra)
206 if err != nil {
207 t.Fatal(err)
208 }
209 }
210
211 var udpConnLocalNameTests = []struct {
212 net string
213 laddr *UDPAddr
214 }{
215 {"udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)}},
216 {"udp4", &UDPAddr{}},
217 {"udp4", nil},
218 }
219
220 func TestUDPConnLocalName(t *testing.T) {
221 testenv.MustHaveExternalNetwork(t)
222
223 for _, tt := range udpConnLocalNameTests {
224 c, err := ListenUDP(tt.net, tt.laddr)
225 if err != nil {
226 t.Fatal(err)
227 }
228 defer c.Close()
229 la := c.LocalAddr()
230 if a, ok := la.(*UDPAddr); !ok || a.Port == 0 {
231 t.Fatalf("got %v; expected a proper address with non-zero port number", la)
232 }
233 }
234 }
235
236 func TestUDPConnLocalAndRemoteNames(t *testing.T) {
237 for _, laddr := range []string{"", "127.0.0.1:0"} {
238 c1, err := ListenPacket("udp", "127.0.0.1:0")
239 if err != nil {
240 t.Fatal(err)
241 }
242 defer c1.Close()
243
244 var la *UDPAddr
245 if laddr != "" {
246 var err error
247 if la, err = ResolveUDPAddr("udp", laddr); err != nil {
248 t.Fatal(err)
249 }
250 }
251 c2, err := DialUDP("udp", la, c1.LocalAddr().(*UDPAddr))
252 if err != nil {
253 t.Fatal(err)
254 }
255 defer c2.Close()
256
257 var connAddrs = [4]struct {
258 got Addr
259 ok bool
260 }{
261 {c1.LocalAddr(), true},
262 {c1.(*UDPConn).RemoteAddr(), false},
263 {c2.LocalAddr(), true},
264 {c2.RemoteAddr(), true},
265 }
266 for _, ca := range connAddrs {
267 if a, ok := ca.got.(*UDPAddr); ok != ca.ok || ok && a.Port == 0 {
268 t.Fatalf("got %v; expected a proper address with non-zero port number", ca.got)
269 }
270 }
271 }
272 }
273
274 func TestIPv6LinkLocalUnicastUDP(t *testing.T) {
275 testenv.MustHaveExternalNetwork(t)
276
277 if !supportsIPv6() {
278 t.Skip("IPv6 is not supported")
279 }
280
281 for i, tt := range ipv6LinkLocalUnicastUDPTests {
282 c1, err := ListenPacket(tt.network, tt.address)
283 if err != nil {
284
285
286 t.Log(err)
287 continue
288 }
289 ls, err := (&packetListener{PacketConn: c1}).newLocalServer()
290 if err != nil {
291 t.Fatal(err)
292 }
293 defer ls.teardown()
294 ch := make(chan error, 1)
295 handler := func(ls *localPacketServer, c PacketConn) { packetTransponder(c, ch) }
296 if err := ls.buildup(handler); err != nil {
297 t.Fatal(err)
298 }
299 if la, ok := c1.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" {
300 t.Fatalf("got %v; expected a proper address with zone identifier", la)
301 }
302
303 c2, err := Dial(tt.network, ls.PacketConn.LocalAddr().String())
304 if err != nil {
305 t.Fatal(err)
306 }
307 defer c2.Close()
308 if la, ok := c2.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" {
309 t.Fatalf("got %v; expected a proper address with zone identifier", la)
310 }
311 if ra, ok := c2.RemoteAddr().(*UDPAddr); !ok || !tt.nameLookup && ra.Zone == "" {
312 t.Fatalf("got %v; expected a proper address with zone identifier", ra)
313 }
314
315 if _, err := c2.Write([]byte("UDP OVER IPV6 LINKLOCAL TEST")); err != nil {
316 t.Fatal(err)
317 }
318 b := make([]byte, 32)
319 if _, err := c2.Read(b); err != nil {
320 t.Fatal(err)
321 }
322
323 for err := range ch {
324 t.Errorf("#%d: %v", i, err)
325 }
326 }
327 }
328
329 func TestUDPZeroBytePayload(t *testing.T) {
330 switch runtime.GOOS {
331 case "plan9":
332 t.Skipf("not supported on %s", runtime.GOOS)
333 case "darwin", "ios":
334 testenv.SkipFlaky(t, 29225)
335 }
336
337 c, err := newLocalPacketListener("udp")
338 if err != nil {
339 t.Fatal(err)
340 }
341 defer c.Close()
342
343 for _, genericRead := range []bool{false, true} {
344 n, err := c.WriteTo(nil, c.LocalAddr())
345 if err != nil {
346 t.Fatal(err)
347 }
348 if n != 0 {
349 t.Errorf("got %d; want 0", n)
350 }
351 c.SetReadDeadline(time.Now().Add(30 * time.Second))
352 var b [1]byte
353 var name string
354 if genericRead {
355 _, err = c.(Conn).Read(b[:])
356 name = "Read"
357 } else {
358 _, _, err = c.ReadFrom(b[:])
359 name = "ReadFrom"
360 }
361 if err != nil {
362 t.Errorf("%s of zero byte packet failed: %v", name, err)
363 }
364 }
365 }
366
367 func TestUDPZeroByteBuffer(t *testing.T) {
368 switch runtime.GOOS {
369 case "plan9":
370 t.Skipf("not supported on %s", runtime.GOOS)
371 }
372
373 c, err := newLocalPacketListener("udp")
374 if err != nil {
375 t.Fatal(err)
376 }
377 defer c.Close()
378
379 b := []byte("UDP ZERO BYTE BUFFER TEST")
380 for _, genericRead := range []bool{false, true} {
381 n, err := c.WriteTo(b, c.LocalAddr())
382 if err != nil {
383 t.Fatal(err)
384 }
385 if n != len(b) {
386 t.Errorf("got %d; want %d", n, len(b))
387 }
388 c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
389 if genericRead {
390 _, err = c.(Conn).Read(nil)
391 } else {
392 _, _, err = c.ReadFrom(nil)
393 }
394 switch err {
395 case nil:
396 default:
397 if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" {
398 t.Fatal(err)
399 }
400 }
401 }
402 }
403
404 func TestUDPReadSizeError(t *testing.T) {
405 switch runtime.GOOS {
406 case "plan9":
407 t.Skipf("not supported on %s", runtime.GOOS)
408 }
409
410 c1, err := newLocalPacketListener("udp")
411 if err != nil {
412 t.Fatal(err)
413 }
414 defer c1.Close()
415
416 c2, err := Dial("udp", c1.LocalAddr().String())
417 if err != nil {
418 t.Fatal(err)
419 }
420 defer c2.Close()
421
422 b1 := []byte("READ SIZE ERROR TEST")
423 for _, genericRead := range []bool{false, true} {
424 n, err := c2.Write(b1)
425 if err != nil {
426 t.Fatal(err)
427 }
428 if n != len(b1) {
429 t.Errorf("got %d; want %d", n, len(b1))
430 }
431 c1.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
432 b2 := make([]byte, len(b1)-1)
433 if genericRead {
434 n, err = c1.(Conn).Read(b2)
435 } else {
436 n, _, err = c1.ReadFrom(b2)
437 }
438 switch err {
439 case nil:
440 default:
441 if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" {
442 t.Fatal(err)
443 }
444 }
445 if n != len(b1)-1 {
446 t.Fatalf("got %d; want %d", n, len(b1)-1)
447 }
448 }
449 }
450
451
452
453 func TestUDPReadTimeout(t *testing.T) {
454 la, err := ResolveUDPAddr("udp4", "127.0.0.1:0")
455 if err != nil {
456 t.Fatal(err)
457 }
458 c, err := ListenUDP("udp4", la)
459 if err != nil {
460 t.Fatal(err)
461 }
462 defer c.Close()
463
464 c.SetDeadline(time.Now())
465 b := make([]byte, 1)
466 n, addr, err := c.ReadFromUDP(b)
467 if !errors.Is(err, os.ErrDeadlineExceeded) {
468 t.Errorf("ReadFromUDP got err %v want os.ErrDeadlineExceeded", err)
469 }
470 if n != 0 {
471 t.Errorf("ReadFromUDP got n %d want 0", n)
472 }
473 if addr != nil {
474 t.Errorf("ReadFromUDP got addr %+#v want nil", addr)
475 }
476 }
477
478 func BenchmarkWriteToReadFromUDP(b *testing.B) {
479 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
480 if err != nil {
481 b.Fatal(err)
482 }
483 addr := conn.LocalAddr()
484 buf := make([]byte, 8)
485 b.ResetTimer()
486 b.ReportAllocs()
487 for i := 0; i < b.N; i++ {
488 _, err := conn.WriteTo(buf, addr)
489 if err != nil {
490 b.Fatal(err)
491 }
492 _, _, err = conn.ReadFromUDP(buf)
493 if err != nil {
494 b.Fatal(err)
495 }
496 }
497 }
498
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