mirror of
https://github.com/golang/go
synced 2024-09-24 21:20:13 -06:00
112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
// Copyright 2009 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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// $G $F.go && $L $F.$A && GOMAXPROCS=2 ./$A.out
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package main
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import (
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"net";
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"flag";
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"io";
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"os";
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"syscall"
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)
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// If an IPv6 tunnel is running (see go/stubl), we can try dialing a real IPv6 address.
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var ipv6 = false
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var ipv6_flag = flag.Bool("ipv6", false, &ipv6, "assume ipv6 tunnel is present")
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func StringToBuf(s string) *[]byte
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{
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l := len(s);
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b := new([]byte, l);
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for i := 0; i < l; i++ {
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b[i] = s[i];
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}
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return b;
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}
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func Readn(fd io.Read, buf *[]byte) (n int, err *os.Error) {
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n = 0;
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for n < len(buf) {
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nn, e := fd.Read(buf[n:len(buf)]);
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if nn > 0 {
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n += nn
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}
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if e != nil {
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return n, e
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}
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}
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return n, nil
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}
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// fd is already connected to www.google.com port 80.
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// Run an HTTP request to fetch the main page.
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func FetchGoogle(fd net.Conn) {
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req := StringToBuf("GET / HTTP/1.0\r\nHost: www.google.com\r\n\r\n");
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n, errno := fd.Write(req);
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buf := new([1000]byte);
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n, errno = Readn(fd, buf);
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fd.Close();
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if n < 1000 {
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panic("short http read");
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}
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}
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func TestDial(network, addr string) {
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fd, err := net.Dial(network, "", addr)
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if err != nil {
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panic("net.Dial ", network, " ", addr, ": ", err.String())
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}
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FetchGoogle(fd)
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}
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func TestDialTCP(network, addr string) {
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fd, err := net.DialTCP(network, "", addr)
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if err != nil {
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panic("net.DialTCP ", network, " ", addr, ": ", err.String())
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}
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FetchGoogle(fd)
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}
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var addrs = []string {
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"74.125.19.99:80",
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"074.125.019.099:0080",
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"[::ffff:74.125.19.99]:80",
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"[::ffff:4a7d:1363]:80",
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"[0:0:0:0:0000:ffff:74.125.19.99]:80",
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"[0:0:0:0:000000:ffff:74.125.19.99]:80",
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"[0:0:0:0:0:ffff::74.125.19.99]:80",
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"[2001:4860:0:2001::68]:80" // ipv6.google.com; removed if ipv6 flag not set
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}
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func main()
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{
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flag.Parse()
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// If no ipv6 tunnel, don't try the last address.
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if !ipv6 {
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addrs[len(addrs)-1] = ""
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}
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for i := 0; i < len(addrs); i++ {
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addr := addrs[i]
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if addr == "" {
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continue
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}
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// print(addr, "\n");
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TestDial("tcp", addr);
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TestDialTCP("tcp", addr)
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if addr[0] != '[' {
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TestDial("tcp4", addr);
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TestDialTCP("tcp4", addr)
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}
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TestDial("tcp6", addr);
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TestDialTCP("tcp6", addr)
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}
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}
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