Preview: udpsock_test.go
Size: 17.24 KB
/proc/thread-self/root/opt/golang/1.22.0/src/net/udpsock_test.go
// 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 (
"errors"
"fmt"
"internal/testenv"
"net/netip"
"os"
"reflect"
"runtime"
"testing"
"time"
)
func BenchmarkUDP6LinkLocalUnicast(b *testing.B) {
testHookUninstaller.Do(uninstallTestHooks)
if !supportsIPv6() {
b.Skip("IPv6 is not supported")
}
ifi := loopbackInterface()
if ifi == nil {
b.Skip("loopback interface not found")
}
lla := ipv6LinkLocalUnicastAddr(ifi)
if lla == "" {
b.Skip("IPv6 link-local unicast address not found")
}
c1, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
if err != nil {
b.Fatal(err)
}
defer c1.Close()
c2, err := ListenPacket("udp6", JoinHostPort(lla+"%"+ifi.Name, "0"))
if err != nil {
b.Fatal(err)
}
defer c2.Close()
var buf [1]byte
for i := 0; i < b.N; i++ {
if _, err := c1.WriteTo(buf[:], c2.LocalAddr()); err != nil {
b.Fatal(err)
}
if _, _, err := c2.ReadFrom(buf[:]); err != nil {
b.Fatal(err)
}
}
}
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")},
{"udp", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
{"udp", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 53}, nil},
{"udp", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
{"udp4", "127.0.0.1:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
{"udp4", "[::ffff:127.0.0.1]:domain", &UDPAddr{IP: ParseIP("127.0.0.1"), Port: 53}, nil},
{"udp6", "[2001:db8::1]:domain", &UDPAddr{IP: ParseIP("2001:db8::1"), Port: 53}, nil},
{"udp4", "[2001:db8::1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}},
{"udp6", "127.0.0.1:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}},
{"udp6", "[::ffff:127.0.0.1]:domain", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}},
}
func TestResolveUDPAddr(t *testing.T) {
origTestHookLookupIP := testHookLookupIP
defer func() { testHookLookupIP = origTestHookLookupIP }()
testHookLookupIP = lookupLocalhost
for _, tt := range resolveUDPAddrTests {
addr, err := ResolveUDPAddr(tt.network, tt.litAddrOrName)
if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) {
t.Errorf("ResolveUDPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err)
continue
}
if err == nil {
addr2, err := ResolveUDPAddr(addr.Network(), addr.String())
if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err {
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)
}
}
}
}
func TestWriteToUDP(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
if !testableNetwork("udp") {
t.Skipf("skipping: udp not supported")
}
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)
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)
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) {
testenv.MustHaveExternalNetwork(t)
for _, tt := range udpConnLocalNameTests {
t.Run(fmt.Sprint(tt.laddr), func(t *testing.T) {
if !testableNetwork(tt.net) {
t.Skipf("skipping: %s not available", tt.net)
}
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) {
if !testableNetwork("udp") {
t.Skipf("skipping: udp not available")
}
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) {
testenv.MustHaveExternalNetwork(t)
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 := (&packetListener{PacketConn: c1}).newLocalServer()
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 "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
case "darwin", "ios":
testenv.SkipFlaky(t, 29225)
}
if !testableNetwork("udp") {
t.Skipf("skipping: udp not available")
}
c := newLocalPacketListener(t, "udp")
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(30 * time.Second))
var b [1]byte
var name string
if genericRead {
_, err = c.(Conn).Read(b[:])
name = "Read"
} else {
_, _, err = c.ReadFrom(b[:])
name = "ReadFrom"
}
if err != nil {
t.Errorf("%s of zero byte packet failed: %v", name, err)
}
}
}
func TestUDPZeroByteBuffer(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
if !testableNetwork("udp") {
t.Skipf("skipping: udp not available")
}
c := newLocalPacketListener(t, "udp")
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 returns WSAEMSGSIZE
t.Fatal(err)
}
}
}
}
func TestUDPReadSizeError(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %s", runtime.GOOS)
}
if !testableNetwork("udp") {
t.Skipf("skipping: udp not available")
}
c1 := newLocalPacketListener(t, "udp")
defer c1.Close()
c2, err := Dial("udp", c1.LocalAddr().String())
if err != nil {
t.Fatal(err)
}
defer c2.Close()
b1 := []byte("READ SIZE ERROR TEST")
for _, genericRead := range []bool{false, true} {
n, err := c2.Write(b1)
if err != nil {
t.Fatal(err)
}
if n != len(b1) {
t.Errorf("got %d; want %d", n, len(b1))
}
b2 := make([]byte, len(b1)-1)
if genericRead {
n, err = c1.(Conn).Read(b2)
} else {
n, _, err = c1.ReadFrom(b2)
}
if err != nil && runtime.GOOS != "windows" { // Windows returns WSAEMSGSIZE
t.Fatal(err)
}
if n != len(b1)-1 {
t.Fatalf("got %d; want %d", n, len(b1)-1)
}
}
}
// TestUDPReadTimeout verifies that ReadFromUDP with timeout returns an error
// without data or an address.
func TestUDPReadTimeout(t *testing.T) {
if !testableNetwork("udp4") {
t.Skipf("skipping: udp4 not available")
}
la, err := ResolveUDPAddr("udp4", "127.0.0.1:0")
if err != nil {
t.Fatal(err)
}
c, err := ListenUDP("udp4", la)
if err != nil {
t.Fatal(err)
}
defer c.Close()
c.SetDeadline(time.Now())
b := make([]byte, 1)
n, addr, err := c.ReadFromUDP(b)
if !errors.Is(err, os.ErrDeadlineExceeded) {
t.Errorf("ReadFromUDP got err %v want os.ErrDeadlineExceeded", err)
}
if n != 0 {
t.Errorf("ReadFromUDP got n %d want 0", n)
}
if addr != nil {
t.Errorf("ReadFromUDP got addr %+#v want nil", addr)
}
}
func TestAllocs(t *testing.T) {
switch runtime.GOOS {
case "plan9", "js", "wasip1":
// These implementations have not been optimized.
t.Skipf("skipping on %v", runtime.GOOS)
}
if !testableNetwork("udp4") {
t.Skipf("skipping: udp4 not available")
}
// Optimizations are required to remove the allocs.
testenv.SkipIfOptimizationOff(t)
conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
if err != nil {
t.Fatal(err)
}
defer conn.Close()
addr := conn.LocalAddr()
addrPort := addr.(*UDPAddr).AddrPort()
buf := make([]byte, 8)
allocs := testing.AllocsPerRun(1000, func() {
_, _, err := conn.WriteMsgUDPAddrPort(buf, nil, addrPort)
if err != nil {
t.Fatal(err)
}
_, _, _, _, err = conn.ReadMsgUDPAddrPort(buf, nil)
if err != nil {
t.Fatal(err)
}
})
if got := int(allocs); got != 0 {
t.Errorf("WriteMsgUDPAddrPort/ReadMsgUDPAddrPort allocated %d objects", got)
}
allocs = testing.AllocsPerRun(1000, func() {
_, err := conn.WriteToUDPAddrPort(buf, addrPort)
if err != nil {
t.Fatal(err)
}
_, _, err = conn.ReadFromUDPAddrPort(buf)
if err != nil {
t.Fatal(err)
}
})
if got := int(allocs); got != 0 {
t.Errorf("WriteToUDPAddrPort/ReadFromUDPAddrPort allocated %d objects", got)
}
allocs = testing.AllocsPerRun(1000, func() {
_, err := conn.WriteTo(buf, addr)
if err != nil {
t.Fatal(err)
}
_, _, err = conn.ReadFromUDP(buf)
if err != nil {
t.Fatal(err)
}
})
if got := int(allocs); got != 1 {
t.Errorf("WriteTo/ReadFromUDP allocated %d objects", got)
}
}
func BenchmarkReadWriteMsgUDPAddrPort(b *testing.B) {
conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
if err != nil {
b.Fatal(err)
}
defer conn.Close()
addr := conn.LocalAddr().(*UDPAddr).AddrPort()
buf := make([]byte, 8)
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_, _, err := conn.WriteMsgUDPAddrPort(buf, nil, addr)
if err != nil {
b.Fatal(err)
}
_, _, _, _, err = conn.ReadMsgUDPAddrPort(buf, nil)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkWriteToReadFromUDP(b *testing.B) {
conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
if err != nil {
b.Fatal(err)
}
defer conn.Close()
addr := conn.LocalAddr()
buf := make([]byte, 8)
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_, err := conn.WriteTo(buf, addr)
if err != nil {
b.Fatal(err)
}
_, _, err = conn.ReadFromUDP(buf)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkWriteToReadFromUDPAddrPort(b *testing.B) {
conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
if err != nil {
b.Fatal(err)
}
defer conn.Close()
addr := conn.LocalAddr().(*UDPAddr).AddrPort()
buf := make([]byte, 8)
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_, err := conn.WriteToUDPAddrPort(buf, addr)
if err != nil {
b.Fatal(err)
}
_, _, err = conn.ReadFromUDPAddrPort(buf)
if err != nil {
b.Fatal(err)
}
}
}
func TestUDPIPVersionReadMsg(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("skipping on %v", runtime.GOOS)
}
if !testableNetwork("udp4") {
t.Skipf("skipping: udp4 not available")
}
conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
if err != nil {
t.Fatal(err)
}
defer conn.Close()
daddr := conn.LocalAddr().(*UDPAddr).AddrPort()
buf := make([]byte, 8)
_, err = conn.WriteToUDPAddrPort(buf, daddr)
if err != nil {
t.Fatal(err)
}
_, _, _, saddr, err := conn.ReadMsgUDPAddrPort(buf, nil)
if err != nil {
t.Fatal(err)
}
if !saddr.Addr().Is4() {
t.Error("returned AddrPort is not IPv4")
}
_, err = conn.WriteToUDPAddrPort(buf, daddr)
if err != nil {
t.Fatal(err)
}
_, _, _, soldaddr, err := conn.ReadMsgUDP(buf, nil)
if err != nil {
t.Fatal(err)
}
if len(soldaddr.IP) != 4 {
t.Error("returned UDPAddr is not IPv4")
}
}
// TestIPv6WriteMsgUDPAddrPortTargetAddrIPVersion verifies that
// WriteMsgUDPAddrPort accepts IPv4, IPv4-mapped IPv6, and IPv6 target addresses
// on a UDPConn listening on "::".
func TestIPv6WriteMsgUDPAddrPortTargetAddrIPVersion(t *testing.T) {
if !testableNetwork("udp4") {
t.Skipf("skipping: udp4 not available")
}
if !testableNetwork("udp6") {
t.Skipf("skipping: udp6 not available")
}
switch runtime.GOOS {
case "dragonfly", "openbsd":
// DragonflyBSD's IPv6 sockets are always IPv6-only, according to the man page:
// https://www.dragonflybsd.org/cgi/web-man?command=ip6 (search for IPV6_V6ONLY).
// OpenBSD's IPv6 sockets are always IPv6-only, according to the man page:
// https://man.openbsd.org/ip6#IPV6_V6ONLY
t.Skipf("skipping on %v", runtime.GOOS)
}
conn, err := ListenUDP("udp", nil)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
daddr4 := netip.AddrPortFrom(netip.MustParseAddr("127.0.0.1"), 12345)
daddr4in6 := netip.AddrPortFrom(netip.MustParseAddr("::ffff:127.0.0.1"), 12345)
daddr6 := netip.AddrPortFrom(netip.MustParseAddr("::1"), 12345)
buf := make([]byte, 8)
_, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr4)
if err != nil {
t.Fatal(err)
}
_, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr4in6)
if err != nil {
t.Fatal(err)
}
_, _, err = conn.WriteMsgUDPAddrPort(buf, nil, daddr6)
if err != nil {
t.Fatal(err)
}
}
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