mirror of
https://github.com/autc04/Retro68.git
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192 lines
4.6 KiB
Go
192 lines
4.6 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"internal/testenv"
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"os"
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"os/exec"
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"runtime"
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"strconv"
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"strings"
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"testing"
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)
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var unixEnabledOnAIX bool
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func init() {
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if runtime.GOOS == "aix" {
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// Unix network isn't properly working on AIX 7.2 with
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// Technical Level < 2.
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// The information is retrieved only once in this init()
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// instead of everytime testableNetwork is called.
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out, _ := exec.Command("oslevel", "-s").Output()
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if len(out) >= len("7200-XX-ZZ-YYMM") { // AIX 7.2, Tech Level XX, Service Pack ZZ, date YYMM
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aixVer := string(out[:4])
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tl, _ := strconv.Atoi(string(out[5:7]))
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unixEnabledOnAIX = aixVer > "7200" || (aixVer == "7200" && tl >= 2)
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}
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}
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}
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// testableNetwork reports whether network is testable on the current
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// platform configuration.
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func testableNetwork(network string) bool {
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net, _, _ := strings.Cut(network, ":")
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switch net {
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case "ip+nopriv":
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case "ip", "ip4", "ip6":
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switch runtime.GOOS {
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case "plan9":
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return false
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default:
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if os.Getuid() != 0 {
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return false
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}
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}
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case "unix", "unixgram":
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switch runtime.GOOS {
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case "android", "plan9", "windows":
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return false
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case "aix":
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return unixEnabledOnAIX
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}
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// iOS does not support unix, unixgram.
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if iOS() {
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return false
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}
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case "unixpacket":
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switch runtime.GOOS {
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case "aix", "android", "darwin", "ios", "plan9", "windows":
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return false
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case "netbsd":
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// It passes on amd64 at least. 386 fails (Issue 22927). arm is unknown.
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if runtime.GOARCH == "386" {
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return false
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}
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}
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}
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switch net {
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case "tcp4", "udp4", "ip4":
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if !supportsIPv4() {
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return false
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}
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case "tcp6", "udp6", "ip6":
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if !supportsIPv6() {
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return false
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}
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}
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return true
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}
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func iOS() bool {
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return runtime.GOOS == "ios"
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}
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// testableAddress reports whether address of network is testable on
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// the current platform configuration.
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func testableAddress(network, address string) bool {
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switch net, _, _ := strings.Cut(network, ":"); net {
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case "unix", "unixgram", "unixpacket":
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// Abstract unix domain sockets, a Linux-ism.
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if address[0] == '@' && runtime.GOOS != "linux" {
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return false
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}
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}
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return true
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}
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// testableListenArgs reports whether arguments are testable on the
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// current platform configuration.
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func testableListenArgs(network, address, client string) bool {
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if !testableNetwork(network) || !testableAddress(network, address) {
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return false
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}
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var err error
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var addr Addr
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switch net, _, _ := strings.Cut(network, ":"); net {
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case "tcp", "tcp4", "tcp6":
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addr, err = ResolveTCPAddr("tcp", address)
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case "udp", "udp4", "udp6":
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addr, err = ResolveUDPAddr("udp", address)
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case "ip", "ip4", "ip6":
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addr, err = ResolveIPAddr("ip", address)
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default:
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return true
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}
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if err != nil {
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return false
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}
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var ip IP
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var wildcard bool
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switch addr := addr.(type) {
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case *TCPAddr:
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ip = addr.IP
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wildcard = addr.isWildcard()
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case *UDPAddr:
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ip = addr.IP
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wildcard = addr.isWildcard()
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case *IPAddr:
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ip = addr.IP
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wildcard = addr.isWildcard()
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}
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// Test wildcard IP addresses.
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if wildcard && !testenv.HasExternalNetwork() {
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return false
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}
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// Test functionality of IPv4 communication using AF_INET and
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// IPv6 communication using AF_INET6 sockets.
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if !supportsIPv4() && ip.To4() != nil {
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return false
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}
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if !supportsIPv6() && ip.To16() != nil && ip.To4() == nil {
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return false
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}
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cip := ParseIP(client)
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if cip != nil {
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if !supportsIPv4() && cip.To4() != nil {
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return false
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}
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if !supportsIPv6() && cip.To16() != nil && cip.To4() == nil {
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return false
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}
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}
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// Test functionality of IPv4 communication using AF_INET6
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// sockets.
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if !supportsIPv4map() && supportsIPv4() && (network == "tcp" || network == "udp" || network == "ip") && wildcard {
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// At this point, we prefer IPv4 when ip is nil.
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// See favoriteAddrFamily for further information.
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if ip.To16() != nil && ip.To4() == nil && cip.To4() != nil { // a pair of IPv6 server and IPv4 client
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return false
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}
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if (ip.To4() != nil || ip == nil) && cip.To16() != nil && cip.To4() == nil { // a pair of IPv4 server and IPv6 client
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return false
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}
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}
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return true
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}
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func condFatalf(t *testing.T, network string, format string, args ...any) {
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t.Helper()
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// A few APIs like File and Read/WriteMsg{UDP,IP} are not
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// fully implemented yet on Plan 9 and Windows.
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switch runtime.GOOS {
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case "windows":
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if network == "file+net" {
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t.Logf(format, args...)
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return
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}
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case "plan9":
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t.Logf(format, args...)
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return
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}
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t.Fatalf(format, args...)
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}
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