// Copyright 2012 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package net import ( "reflect" "runtime" "testing" "time" ) type resolveUDPAddrTest struct { network string litAddrOrName string addr *UDPAddr err error } var resolveUDPAddrTests = []resolveUDPAddrTest{ {"udp", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, {"udp4", "127.0.0.1:65535", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil}, {"udp", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil}, {"udp6", "[::1]:65535", &UDPAddr{IP: ParseIP("::1"), Port: 65535}, nil}, {"udp", "[::1%en0]:1", &UDPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil}, {"udp6", "[::1%911]:2", &UDPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil}, {"", "127.0.0.1:0", &UDPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior {"", "[::1]:0", &UDPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior {"udp", ":12345", &UDPAddr{Port: 12345}, nil}, {"http", "127.0.0.1:0", nil, UnknownNetworkError("http")}, } func TestResolveUDPAddr(t *testing.T) { origTestHookLookupIP := testHookLookupIP defer func() { testHookLookupIP = origTestHookLookupIP }() testHookLookupIP = lookupLocalhost for i, tt := range resolveUDPAddrTests { addr, err := ResolveUDPAddr(tt.network, tt.litAddrOrName) if err != tt.err { t.Errorf("#%d: %v", i, err) } else if !reflect.DeepEqual(addr, tt.addr) { t.Errorf("#%d: got %#v; want %#v", i, addr, tt.addr) } if err != nil { continue } rtaddr, err := ResolveUDPAddr(addr.Network(), addr.String()) if err != nil { t.Errorf("#%d: %v", i, err) } else if !reflect.DeepEqual(rtaddr, addr) { t.Errorf("#%d: got %#v; want %#v", i, rtaddr, addr) } } } func TestWriteToUDP(t *testing.T) { switch runtime.GOOS { case "plan9": t.Skipf("not supported on %s", runtime.GOOS) } c, err := ListenPacket("udp", "127.0.0.1:0") if err != nil { t.Fatal(err) } defer c.Close() testWriteToConn(t, c.LocalAddr().String()) testWriteToPacketConn(t, c.LocalAddr().String()) } func testWriteToConn(t *testing.T, raddr string) { c, err := Dial("udp", raddr) if err != nil { t.Fatal(err) } defer c.Close() ra, err := ResolveUDPAddr("udp", raddr) if err != nil { t.Fatal(err) } b := []byte("CONNECTED-MODE SOCKET") _, err = c.(*UDPConn).WriteToUDP(b, ra) if err == nil { t.Fatal("should fail") } if err != nil && err.(*OpError).Err != ErrWriteToConnected { t.Fatalf("should fail as ErrWriteToConnected: %v", err) } _, err = c.(*UDPConn).WriteTo(b, ra) if err == nil { t.Fatal("should fail") } if err != nil && err.(*OpError).Err != ErrWriteToConnected { t.Fatalf("should fail as ErrWriteToConnected: %v", err) } _, err = c.Write(b) if err != nil { t.Fatal(err) } _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra) if err == nil { t.Fatal("should fail") } if err != nil && err.(*OpError).Err != ErrWriteToConnected { t.Fatalf("should fail as ErrWriteToConnected: %v", err) } _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil) switch runtime.GOOS { case "nacl", "windows": // see golang.org/issue/9252 t.Skipf("not implemented yet on %s", runtime.GOOS) default: if err != nil { t.Fatal(err) } } } func testWriteToPacketConn(t *testing.T, raddr string) { c, err := ListenPacket("udp", "127.0.0.1:0") if err != nil { t.Fatal(err) } defer c.Close() ra, err := ResolveUDPAddr("udp", raddr) if err != nil { t.Fatal(err) } b := []byte("UNCONNECTED-MODE SOCKET") _, err = c.(*UDPConn).WriteToUDP(b, ra) if err != nil { t.Fatal(err) } _, err = c.WriteTo(b, ra) if err != nil { t.Fatal(err) } _, err = c.(*UDPConn).Write(b) if err == nil { t.Fatal("should fail") } _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, nil) if err == nil { t.Fatal("should fail") } if err != nil && err.(*OpError).Err != errMissingAddress { t.Fatalf("should fail as errMissingAddress: %v", err) } _, _, err = c.(*UDPConn).WriteMsgUDP(b, nil, ra) switch runtime.GOOS { case "nacl", "windows": // see golang.org/issue/9252 t.Skipf("not implemented yet on %s", runtime.GOOS) default: if err != nil { t.Fatal(err) } } } var udpConnLocalNameTests = []struct { net string laddr *UDPAddr }{ {"udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)}}, {"udp4", &UDPAddr{}}, {"udp4", nil}, } func TestUDPConnLocalName(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("avoid external network") } for _, tt := range udpConnLocalNameTests { c, err := ListenUDP(tt.net, tt.laddr) if err != nil { t.Fatal(err) } defer c.Close() la := c.LocalAddr() if a, ok := la.(*UDPAddr); !ok || a.Port == 0 { t.Fatalf("got %v; expected a proper address with non-zero port number", la) } } } func TestUDPConnLocalAndRemoteNames(t *testing.T) { for _, laddr := range []string{"", "127.0.0.1:0"} { c1, err := ListenPacket("udp", "127.0.0.1:0") if err != nil { t.Fatal(err) } defer c1.Close() var la *UDPAddr if laddr != "" { var err error if la, err = ResolveUDPAddr("udp", laddr); err != nil { t.Fatal(err) } } c2, err := DialUDP("udp", la, c1.LocalAddr().(*UDPAddr)) if err != nil { t.Fatal(err) } defer c2.Close() var connAddrs = [4]struct { got Addr ok bool }{ {c1.LocalAddr(), true}, {c1.(*UDPConn).RemoteAddr(), false}, {c2.LocalAddr(), true}, {c2.RemoteAddr(), true}, } for _, ca := range connAddrs { if a, ok := ca.got.(*UDPAddr); ok != ca.ok || ok && a.Port == 0 { t.Fatalf("got %v; expected a proper address with non-zero port number", ca.got) } } } } func TestIPv6LinkLocalUnicastUDP(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("avoid external network") } if !supportsIPv6 { t.Skip("IPv6 is not supported") } for i, tt := range ipv6LinkLocalUnicastUDPTests { c1, err := ListenPacket(tt.network, tt.address) if err != nil { // It might return "LookupHost returned no // suitable address" error on some platforms. t.Log(err) continue } ls, err := (&packetListener{PacketConn: c1}).newLocalServer() if err != nil { t.Fatal(err) } defer ls.teardown() ch := make(chan error, 1) handler := func(ls *localPacketServer, c PacketConn) { packetTransponder(c, ch) } if err := ls.buildup(handler); err != nil { t.Fatal(err) } if la, ok := c1.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" { t.Fatalf("got %v; expected a proper address with zone identifier", la) } c2, err := Dial(tt.network, ls.PacketConn.LocalAddr().String()) if err != nil { t.Fatal(err) } defer c2.Close() if la, ok := c2.LocalAddr().(*UDPAddr); !ok || !tt.nameLookup && la.Zone == "" { t.Fatalf("got %v; expected a proper address with zone identifier", la) } if ra, ok := c2.RemoteAddr().(*UDPAddr); !ok || !tt.nameLookup && ra.Zone == "" { t.Fatalf("got %v; expected a proper address with zone identifier", ra) } if _, err := c2.Write([]byte("UDP OVER IPV6 LINKLOCAL TEST")); err != nil { t.Fatal(err) } b := make([]byte, 32) if _, err := c2.Read(b); err != nil { t.Fatal(err) } for err := range ch { t.Errorf("#%d: %v", i, err) } } } func TestUDPZeroBytePayload(t *testing.T) { switch runtime.GOOS { case "nacl", "plan9": t.Skipf("not supported on %s", runtime.GOOS) } c, err := newLocalPacketListener("udp") if err != nil { t.Fatal(err) } defer c.Close() for _, genericRead := range []bool{false, true} { n, err := c.WriteTo(nil, c.LocalAddr()) if err != nil { t.Fatal(err) } if n != 0 { t.Errorf("got %d; want 0", n) } c.SetReadDeadline(time.Now().Add(100 * time.Millisecond)) var b [1]byte if genericRead { _, err = c.(Conn).Read(b[:]) } else { _, _, err = c.ReadFrom(b[:]) } switch err { case nil: // ReadFrom succeeds default: // Read may timeout, it depends on the platform if nerr, ok := err.(Error); !ok || !nerr.Timeout() { t.Fatal(err) } } } } func TestUDPZeroByteBuffer(t *testing.T) { switch runtime.GOOS { case "nacl", "plan9": t.Skipf("not supported on %s", runtime.GOOS) } c, err := newLocalPacketListener("udp") if err != nil { t.Fatal(err) } defer c.Close() b := []byte("UDP ZERO BYTE BUFFER TEST") for _, genericRead := range []bool{false, true} { n, err := c.WriteTo(b, c.LocalAddr()) if err != nil { t.Fatal(err) } if n != len(b) { t.Errorf("got %d; want %d", n, len(b)) } c.SetReadDeadline(time.Now().Add(100 * time.Millisecond)) if genericRead { _, err = c.(Conn).Read(nil) } else { _, _, err = c.ReadFrom(nil) } switch err { case nil: // ReadFrom succeeds default: // Read may timeout, it depends on the platform if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" { // Windows retruns WSAEMSGSIZ t.Fatal(err) } } } }