1 // Copyright 2012 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.
19 func BenchmarkUDP6LinkLocalUnicast(b *testing.B) {
20 testHookUninstaller.Do(uninstallTestHooks)
23 b.Skip("IPv6 is not supported")
25 ifi := loopbackInterface()
27 b.Skip("loopback interface not found")
29 lla := ipv6LinkLocalUnicastAddr(ifi)
31 b.Skip("IPv6 link-local unicast address not found")
34 c1, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
39 c2, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
46 for i := 0; i < b.N; i++ {
47 if _, err := c1.WriteTo(buf[:], c2.LocalAddr()); err != nil {
50 if _, _, err := c2.ReadFrom(buf[:]); err != nil {
56 type resolveUDPAddrTest struct {
63 var resolveUDPAddrTests = []resolveUDPAddrTest{
64 {"udp", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil},
65 {"udp4", "127.0.0.1:65535", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil},
67 {"udp", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil},
68 {"udp6", "[::1]:65535", &UDPAddr{IP: ParseIP("::1"), Port: 65535}, nil},
70 {"udp", "[::1%en0]:1", &UDPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil},
71 {"udp6", "[::1%911]:2", &UDPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil},
73 {"", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior
74 {"", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior
76 {"udp", ":12345", &UDPAddr{Port: 12345}, nil},
78 {"http", "127.0.0.1:0", nil, UnknownNetworkError("http")},
80 {"udp", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
81 {"udp", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 53}, nil},
82 {"udp", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
83 {"udp4", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
84 {"udp4", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
85 {"udp6", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
87 {"udp4", "[2001:db8::1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}},
88 {"udp6", "127.0.0.1:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}},
89 {"udp6", "[::ffff:127.0.0.1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}},
92 func TestResolveUDPAddr(t *testing.T) {
93 origTestHookLookupIP := testHookLookupIP
94 defer func() { testHookLookupIP = origTestHookLookupIP }()
95 testHookLookupIP = lookupLocalhost
97 for _, tt := range resolveUDPAddrTests {
98 addr, err := ResolveUDPAddr(tt.network, tt.litAddrOrName)
99 if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) {
100 t.Errorf("ResolveUDPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err)
104 addr2, err := ResolveUDPAddr(addr.Network(), addr.String())
105 if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err {
106 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)
112 func TestWriteToUDP(t *testing.T) {
113 switch runtime.GOOS {
115 t.Skipf("not supported on %s", runtime.GOOS)
118 if !testableNetwork("udp") {
119 t.Skipf("skipping: udp not supported")
122 c, err := ListenPacket("udp", "127.0.0.1:0")
128 testWriteToConn(t, c.LocalAddr().String())
129 testWriteToPacketConn(t, c.LocalAddr().String())
132 func testWriteToConn(t *testing.T, raddr string) {
133 c, err := Dial("udp", raddr)
139 ra, err := ResolveUDPAddr("udp", raddr)
144 b := []byte("CONNECTED-MODE SOCKET")
145 _, err = c.(*UDPConn).WriteToUDP(b, ra)
147 t.Fatal("should fail")
149 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
150 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
152 _, err = c.(*UDPConn).WriteTo(b, ra)
154 t.Fatal("should fail")
156 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
157 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
163 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra)
165 t.Fatal("should fail")
167 if err != nil && err.(*OpError).Err != ErrWriteToConnected {
168 t.Fatalf("should fail as ErrWriteToConnected: %v", err)
170 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil)
176 func testWriteToPacketConn(t *testing.T, raddr string) {
177 c, err := ListenPacket("udp", "127.0.0.1:0")
183 ra, err := ResolveUDPAddr("udp", raddr)
188 b := []byte("UNCONNECTED-MODE SOCKET")
189 _, err = c.(*UDPConn).WriteToUDP(b, ra)
193 _, err = c.WriteTo(b, ra)
197 _, err = c.(*UDPConn).Write(b)
199 t.Fatal("should fail")
201 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil)
203 t.Fatal("should fail")
205 if err != nil && err.(*OpError).Err != errMissingAddress {
206 t.Fatalf("should fail as errMissingAddress: %v", err)
208 _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra)
214 var udpConnLocalNameTests = []struct {
218 {"udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)}},
219 {"udp4", &UDPAddr{}},
223 func TestUDPConnLocalName(t *testing.T) {
224 testenv.MustHaveExternalNetwork(t)
226 for _, tt := range udpConnLocalNameTests {
227 t.Run(fmt.Sprint(tt.laddr), func(t *testing.T) {
228 if !testableNetwork(tt.net) {
229 t.Skipf("skipping: %s not available", tt.net)
232 c, err := ListenUDP(tt.net, tt.laddr)
238 if a, ok := la.(*UDPAddr); !ok || a.Port == 0 {
239 t.Fatalf("got %v; expected a proper address with non-zero port number", la)
245 func TestUDPConnLocalAndRemoteNames(t *testing.T) {
246 if !testableNetwork("udp") {
247 t.Skipf("skipping: udp not available")
250 for _, laddr := range []string{"", "127.0.0.1:0"} {
251 c1, err := ListenPacket("udp", "127.0.0.1:0")
260 if la, err = ResolveUDPAddr("udp", laddr); err != nil {
264 c2, err := DialUDP("udp", la, c1.LocalAddr().(*UDPAddr))
270 var connAddrs = [4]struct {
274 {c1.LocalAddr(), true},
275 {c1.(*UDPConn).RemoteAddr(), false},
276 {c2.LocalAddr(), true},
277 {c2.RemoteAddr(), true},
279 for _, ca := range connAddrs {
280 if a, ok := ca.got.(*UDPAddr); ok != ca.ok || ok && a.Port == 0 {
281 t.Fatalf("got %v; expected a proper address with non-zero port number", ca.got)
287 func TestIPv6LinkLocalUnicastUDP(t *testing.T) {
288 testenv.MustHaveExternalNetwork(t)
291 t.Skip("IPv6 is not supported")
294 for i, tt := range ipv6LinkLocalUnicastUDPTests {
295 c1, err := ListenPacket(tt.network, tt.address)
297 // It might return "LookupHost returned no
298 // suitable address" error on some platforms.
302 ls := (&packetListener{PacketConn: c1}).newLocalServer()
304 ch := make(chan error, 1)
305 handler := func(ls *localPacketServer, c PacketConn) { packetTransponder(c, ch) }
306 if err := ls.buildup(handler); err != nil {
309 if la, ok := c1.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" {
310 t.Fatalf("got %v; expected a proper address with zone identifier", la)
313 c2, err := Dial(tt.network, ls.PacketConn.LocalAddr().String())
318 if la, ok := c2.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" {
319 t.Fatalf("got %v; expected a proper address with zone identifier", la)
321 if ra, ok := c2.RemoteAddr().(*UDPAddr); !ok || !tt.nameLookup && ra.Zone == "" {
322 t.Fatalf("got %v; expected a proper address with zone identifier", ra)
325 if _, err := c2.Write([]byte("UDP OVER IPV6 LINKLOCAL TEST")); err != nil {
328 b := make([]byte, 32)
329 if _, err := c2.Read(b); err != nil {
333 for err := range ch {
334 t.Errorf("#%d: %v", i, err)
339 func TestUDPZeroBytePayload(t *testing.T) {
340 switch runtime.GOOS {
342 t.Skipf("not supported on %s", runtime.GOOS)
343 case "darwin", "ios":
344 testenv.SkipFlaky(t, 29225)
346 if !testableNetwork("udp") {
347 t.Skipf("skipping: udp not available")
350 c := newLocalPacketListener(t, "udp")
353 for _, genericRead := range []bool{false, true} {
354 n, err := c.WriteTo(nil, c.LocalAddr())
359 t.Errorf("got %d; want 0", n)
361 c.SetReadDeadline(time.Now().Add(30 * time.Second))
365 _, err = c.(Conn).Read(b[:])
368 _, _, err = c.ReadFrom(b[:])
372 t.Errorf("%s of zero byte packet failed: %v", name, err)
377 func TestUDPZeroByteBuffer(t *testing.T) {
378 switch runtime.GOOS {
380 t.Skipf("not supported on %s", runtime.GOOS)
382 if !testableNetwork("udp") {
383 t.Skipf("skipping: udp not available")
386 c := newLocalPacketListener(t, "udp")
389 b := []byte("UDP ZERO BYTE BUFFER TEST")
390 for _, genericRead := range []bool{false, true} {
391 n, err := c.WriteTo(b, c.LocalAddr())
396 t.Errorf("got %d; want %d", n, len(b))
398 c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
400 _, err = c.(Conn).Read(nil)
402 _, _, err = c.ReadFrom(nil)
405 case nil: // ReadFrom succeeds
406 default: // Read may timeout, it depends on the platform
407 if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" { // Windows returns WSAEMSGSIZE
414 func TestUDPReadSizeError(t *testing.T) {
415 switch runtime.GOOS {
417 t.Skipf("not supported on %s", runtime.GOOS)
419 if !testableNetwork("udp") {
420 t.Skipf("skipping: udp not available")
423 c1 := newLocalPacketListener(t, "udp")
426 c2, err := Dial("udp", c1.LocalAddr().String())
432 b1 := []byte("READ SIZE ERROR TEST")
433 for _, genericRead := range []bool{false, true} {
434 n, err := c2.Write(b1)
439 t.Errorf("got %d; want %d", n, len(b1))
441 b2 := make([]byte, len(b1)-1)
443 n, err = c1.(Conn).Read(b2)
445 n, _, err = c1.ReadFrom(b2)
447 if err != nil && runtime.GOOS != "windows" { // Windows returns WSAEMSGSIZE
451 t.Fatalf("got %d; want %d", n, len(b1)-1)
456 // TestUDPReadTimeout verifies that ReadFromUDP with timeout returns an error
457 // without data or an address.
458 func TestUDPReadTimeout(t *testing.T) {
459 if !testableNetwork("udp4") {
460 t.Skipf("skipping: udp4 not available")
463 la, err := ResolveUDPAddr("udp4", "127.0.0.1:0")
467 c, err := ListenUDP("udp4", la)
473 c.SetDeadline(time.Now())
475 n, addr, err := c.ReadFromUDP(b)
476 if !errors.Is(err, os.ErrDeadlineExceeded) {
477 t.Errorf("ReadFromUDP got err %v want os.ErrDeadlineExceeded", err)
480 t.Errorf("ReadFromUDP got n %d want 0", n)
483 t.Errorf("ReadFromUDP got addr %+#v want nil", addr)
487 func TestAllocs(t *testing.T) {
488 switch runtime.GOOS {
489 case "plan9", "js", "wasip1":
490 // These implementations have not been optimized.
491 t.Skipf("skipping on %v", runtime.GOOS)
493 if !testableNetwork("udp4") {
494 t.Skipf("skipping: udp4 not available")
497 // Optimizations are required to remove the allocs.
498 testenv.SkipIfOptimizationOff(t)
500 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
505 addr := conn.LocalAddr()
506 addrPort := addr.(*UDPAddr).AddrPort()
507 buf := make([]byte, 8)
509 allocs := testing.AllocsPerRun(1000, func() {
510 _, _, err := conn.WriteMsgUDPAddrPort(buf, nil, addrPort)
514 _, _, _, _, err = conn.ReadMsgUDPAddrPort(buf, nil)
519 if got := int(allocs); got != 0 {
520 t.Errorf("WriteMsgUDPAddrPort/ReadMsgUDPAddrPort allocated %d objects", got)
523 allocs = testing.AllocsPerRun(1000, func() {
524 _, err := conn.WriteToUDPAddrPort(buf, addrPort)
528 _, _, err = conn.ReadFromUDPAddrPort(buf)
533 if got := int(allocs); got != 0 {
534 t.Errorf("WriteToUDPAddrPort/ReadFromUDPAddrPort allocated %d objects", got)
537 allocs = testing.AllocsPerRun(1000, func() {
538 _, err := conn.WriteTo(buf, addr)
542 _, _, err = conn.ReadFromUDP(buf)
547 if got := int(allocs); got != 1 {
548 t.Errorf("WriteTo/ReadFromUDP allocated %d objects", got)
552 func BenchmarkReadWriteMsgUDPAddrPort(b *testing.B) {
553 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
558 addr := conn.LocalAddr().(*UDPAddr).AddrPort()
559 buf := make([]byte, 8)
562 for i := 0; i < b.N; i++ {
563 _, _, err := conn.WriteMsgUDPAddrPort(buf, nil, addr)
567 _, _, _, _, err = conn.ReadMsgUDPAddrPort(buf, nil)
574 func BenchmarkWriteToReadFromUDP(b *testing.B) {
575 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
580 addr := conn.LocalAddr()
581 buf := make([]byte, 8)
584 for i := 0; i < b.N; i++ {
585 _, err := conn.WriteTo(buf, addr)
589 _, _, err = conn.ReadFromUDP(buf)
596 func BenchmarkWriteToReadFromUDPAddrPort(b *testing.B) {
597 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
602 addr := conn.LocalAddr().(*UDPAddr).AddrPort()
603 buf := make([]byte, 8)
606 for i := 0; i < b.N; i++ {
607 _, err := conn.WriteToUDPAddrPort(buf, addr)
611 _, _, err = conn.ReadFromUDPAddrPort(buf)
618 func TestUDPIPVersionReadMsg(t *testing.T) {
619 switch runtime.GOOS {
621 t.Skipf("skipping on %v", runtime.GOOS)
623 if !testableNetwork("udp4") {
624 t.Skipf("skipping: udp4 not available")
627 conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
632 daddr := conn.LocalAddr().(*UDPAddr).AddrPort()
633 buf := make([]byte, 8)
634 _, err = conn.WriteToUDPAddrPort(buf, daddr)
638 _, _, _, saddr, err := conn.ReadMsgUDPAddrPort(buf, nil)
642 if !saddr.Addr().Is4() {
643 t.Error("returned AddrPort is not IPv4")
645 _, err = conn.WriteToUDPAddrPort(buf, daddr)
649 _, _, _, soldaddr, err := conn.ReadMsgUDP(buf, nil)
653 if len(soldaddr.IP) != 4 {
654 t.Error("returned UDPAddr is not IPv4")
658 // TestIPv6WriteMsgUDPAddrPortTargetAddrIPVersion verifies that
659 // WriteMsgUDPAddrPort accepts IPv4, IPv4-mapped IPv6, and IPv6 target addresses
660 // on a UDPConn listening on "::".
661 func TestIPv6WriteMsgUDPAddrPortTargetAddrIPVersion(t *testing.T) {
662 if !testableNetwork("udp4") {
663 t.Skipf("skipping: udp4 not available")
665 if !testableNetwork("udp6") {
666 t.Skipf("skipping: udp6 not available")
669 switch runtime.GOOS {
670 case "dragonfly", "openbsd":
671 // DragonflyBSD's IPv6 sockets are always IPv6-only, according to the man page:
672 // https://www.dragonflybsd.org/cgi/web-man?command=ip6 (search for IPV6_V6ONLY).
673 // OpenBSD's IPv6 sockets are always IPv6-only, according to the man page:
674 // https://man.openbsd.org/ip6#IPV6_V6ONLY
675 t.Skipf("skipping on %v", runtime.GOOS)
678 conn, err := ListenUDP("udp", nil)
684 daddr4 := netip.AddrPortFrom(netip.MustParseAddr("127.0.0.1"), 12345)
685 daddr4in6 := netip.AddrPortFrom(netip.MustParseAddr("::ffff:127.0.0.1"), 12345)
686 daddr6 := netip.AddrPortFrom(netip.MustParseAddr("::1"), 12345)
687 buf := make([]byte, 8)
689 _, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr4)
694 _, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr4in6)
699 _, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr6)