// 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" "strings" "testing" "time" ) func TestResolveUDPAddr(t *testing.T) { for _, tt := range resolveTCPAddrTests { net := strings.Replace(tt.net, "tcp", "udp", -1) addr, err := ResolveUDPAddr(net, tt.litAddrOrName) if err != tt.err { t.Fatalf("ResolveUDPAddr(%q, %q) failed: %v", net, tt.litAddrOrName, err) } if !reflect.DeepEqual(addr, (*UDPAddr)(tt.addr)) { t.Fatalf("ResolveUDPAddr(%q, %q) = %#v, want %#v", net, tt.litAddrOrName, addr, tt.addr) } if err == nil { str := addr.String() addr1, err := ResolveUDPAddr(net, str) if err != nil { t.Fatalf("ResolveUDPAddr(%q, %q) [from %q]: %v", net, str, tt.litAddrOrName, err) } if !reflect.DeepEqual(addr1, addr) { t.Fatalf("ResolveUDPAddr(%q, %q) [from %q] = %#v, want %#v", net, str, tt.litAddrOrName, addr1, addr) } } } } func TestReadFromUDP(t *testing.T) { switch runtime.GOOS { case "nacl", "plan9": t.Skipf("skipping test on %q, see issue 8916", runtime.GOOS) } ra, err := ResolveUDPAddr("udp", "127.0.0.1:7") if err != nil { t.Fatal(err) } la, err := ResolveUDPAddr("udp", "127.0.0.1:0") if err != nil { t.Fatal(err) } c, err := ListenUDP("udp", la) if err != nil { t.Fatal(err) } defer c.Close() _, err = c.WriteToUDP([]byte("a"), ra) if err != nil { t.Fatal(err) } err = c.SetDeadline(time.Now().Add(100 * time.Millisecond)) if err != nil { t.Fatal(err) } b := make([]byte, 1) _, _, err = c.ReadFromUDP(b) if err == nil { t.Fatal("ReadFromUDP should fail") } else if !isTimeout(err) { t.Fatal(err) } } func TestWriteToUDP(t *testing.T) { switch runtime.GOOS { case "plan9": t.Skipf("skipping test on %q", runtime.GOOS) } l, err := ListenPacket("udp", "127.0.0.1:0") if err != nil { t.Fatalf("Listen failed: %v", err) } defer l.Close() testWriteToConn(t, l.LocalAddr().String()) testWriteToPacketConn(t, l.LocalAddr().String()) } func testWriteToConn(t *testing.T, raddr string) { c, err := Dial("udp", raddr) if err != nil { t.Fatalf("Dial failed: %v", err) } defer c.Close() ra, err := ResolveUDPAddr("udp", raddr) if err != nil { t.Fatalf("ResolveUDPAddr failed: %v", err) } _, err = c.(*UDPConn).WriteToUDP([]byte("Connection-oriented mode socket"), ra) if err == nil { t.Fatal("WriteToUDP should fail") } if err != nil && err.(*OpError).Err != ErrWriteToConnected { t.Fatalf("WriteToUDP should fail as ErrWriteToConnected: %v", err) } _, err = c.(*UDPConn).WriteTo([]byte("Connection-oriented mode socket"), ra) if err == nil { t.Fatal("WriteTo should fail") } if err != nil && err.(*OpError).Err != ErrWriteToConnected { t.Fatalf("WriteTo should fail as ErrWriteToConnected: %v", err) } _, err = c.Write([]byte("Connection-oriented mode socket")) if err != nil { t.Fatalf("Write failed: %v", err) } } func testWriteToPacketConn(t *testing.T, raddr string) { c, err := ListenPacket("udp", "127.0.0.1:0") if err != nil { t.Fatalf("ListenPacket failed: %v", err) } defer c.Close() ra, err := ResolveUDPAddr("udp", raddr) if err != nil { t.Fatalf("ResolveUDPAddr failed: %v", err) } _, err = c.(*UDPConn).WriteToUDP([]byte("Connection-less mode socket"), ra) if err != nil { t.Fatalf("WriteToUDP failed: %v", err) } _, err = c.WriteTo([]byte("Connection-less mode socket"), ra) if err != nil { t.Fatalf("WriteTo failed: %v", err) } _, err = c.(*UDPConn).Write([]byte("Connection-less mode socket")) if err == nil { t.Fatal("Write should fail") } } 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("skipping test to avoid external network") } for _, tt := range udpConnLocalNameTests { c, err := ListenUDP(tt.net, tt.laddr) if err != nil { t.Fatalf("ListenUDP failed: %v", 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.Fatalf("ListenUDP failed: %v", err) } defer c1.Close() var la *UDPAddr if laddr != "" { var err error if la, err = ResolveUDPAddr("udp", laddr); err != nil { t.Fatalf("ResolveUDPAddr failed: %v", err) } } c2, err := DialUDP("udp", la, c1.LocalAddr().(*UDPAddr)) if err != nil { t.Fatalf("DialUDP failed: %v", 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("skipping test to avoid external network") } if !supportsIPv6 { t.Skip("ipv6 is not supported") } ifi := loopbackInterface() if ifi == nil { t.Skip("loopback interface not found") } laddr := ipv6LinkLocalUnicastAddr(ifi) if laddr == "" { t.Skip("ipv6 unicast address on loopback not found") } type test struct { net, addr string nameLookup bool } var tests = []test{ {"udp", "[" + laddr + "%" + ifi.Name + "]:0", false}, {"udp6", "[" + laddr + "%" + ifi.Name + "]:0", false}, } // The first udp test fails on DragonFly - see issue 7473. if runtime.GOOS == "dragonfly" { tests = tests[1:] } switch runtime.GOOS { case "darwin", "dragonfly", "freebsd", "openbsd", "netbsd": tests = append(tests, []test{ {"udp", "[localhost%" + ifi.Name + "]:0", true}, {"udp6", "[localhost%" + ifi.Name + "]:0", true}, }...) case "linux": tests = append(tests, []test{ {"udp", "[ip6-localhost%" + ifi.Name + "]:0", true}, {"udp6", "[ip6-localhost%" + ifi.Name + "]:0", true}, }...) } for _, tt := range tests { c1, err := ListenPacket(tt.net, tt.addr) if err != nil { // It might return "LookupHost returned no // suitable address" error on some platforms. t.Logf("ListenPacket failed: %v", err) continue } defer c1.Close() 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.net, c1.LocalAddr().String()) if err != nil { t.Fatalf("Dial failed: %v", 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.Fatalf("Conn.Write failed: %v", err) } b := make([]byte, 32) if _, from, err := c1.ReadFrom(b); err != nil { t.Fatalf("PacketConn.ReadFrom failed: %v", err) } else { if ra, ok := from.(*UDPAddr); !ok || !tt.nameLookup && ra.Zone == "" { t.Fatalf("got %v; expected a proper address with zone identifier", ra) } } } }