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// 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"
)
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 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},
}
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)
}
}
}
}
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