mirror of
https://github.com/golang/go
synced 2024-11-26 17:56:55 -07:00
983f06bdb6
* 1. all statements and declarations are terminated by semicolons * 2. semicolons can be omitted at top level. * 3. semicolons can be omitted before and after the closing ) or } * on a list of statements or declarations. /home/rsc/bin/addsemi and then diff+tweak. R=r,gri OCL=16620 CL=16643
112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
// Copyright 2009 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.
|
|
|
|
// $G $F.go && $L $F.$A && GOMAXPROCS=2 ./$A.out
|
|
|
|
package main
|
|
|
|
import (
|
|
"net";
|
|
"flag";
|
|
"io";
|
|
"os";
|
|
"syscall"
|
|
)
|
|
|
|
// If an IPv6 tunnel is running (see go/stubl), we can try dialing a real IPv6 address.
|
|
var ipv6 = false
|
|
var ipv6_flag = flag.Bool("ipv6", false, &ipv6, "assume ipv6 tunnel is present")
|
|
|
|
func StringToBuf(s string) *[]byte
|
|
{
|
|
l := len(s);
|
|
b := new([]byte, l);
|
|
for i := 0; i < l; i++ {
|
|
b[i] = s[i];
|
|
}
|
|
return b;
|
|
}
|
|
|
|
func Readn(fd io.Read, buf *[]byte) (n int, err *os.Error) {
|
|
n = 0;
|
|
for n < len(buf) {
|
|
nn, e := fd.Read(buf[n:len(buf)]);
|
|
if nn > 0 {
|
|
n += nn
|
|
}
|
|
if e != nil {
|
|
return n, e
|
|
}
|
|
}
|
|
return n, nil
|
|
}
|
|
|
|
|
|
// fd is already connected to www.google.com port 80.
|
|
// Run an HTTP request to fetch the main page.
|
|
func FetchGoogle(fd net.Conn) {
|
|
req := StringToBuf("GET / HTTP/1.0\r\nHost: www.google.com\r\n\r\n");
|
|
n, errno := fd.Write(req);
|
|
|
|
buf := new([1000]byte);
|
|
n, errno = Readn(fd, buf);
|
|
|
|
fd.Close();
|
|
if n < 1000 {
|
|
panic("short http read");
|
|
}
|
|
}
|
|
|
|
func TestDial(network, addr string) {
|
|
fd, err := net.Dial(network, "", addr);
|
|
if err != nil {
|
|
panic("net.Dial ", network, " ", addr, ": ", err.String())
|
|
}
|
|
FetchGoogle(fd)
|
|
}
|
|
|
|
func TestDialTCP(network, addr string) {
|
|
fd, err := net.DialTCP(network, "", addr);
|
|
if err != nil {
|
|
panic("net.DialTCP ", network, " ", addr, ": ", err.String())
|
|
}
|
|
FetchGoogle(fd)
|
|
}
|
|
|
|
var addrs = []string {
|
|
"74.125.19.99:80",
|
|
"074.125.019.099:0080",
|
|
"[::ffff:74.125.19.99]:80",
|
|
"[::ffff:4a7d:1363]:80",
|
|
"[0:0:0:0:0000:ffff:74.125.19.99]:80",
|
|
"[0:0:0:0:000000:ffff:74.125.19.99]:80",
|
|
"[0:0:0:0:0:ffff::74.125.19.99]:80",
|
|
"[2001:4860:0:2001::68]:80" // ipv6.google.com; removed if ipv6 flag not set
|
|
}
|
|
|
|
func main()
|
|
{
|
|
flag.Parse();
|
|
// If no ipv6 tunnel, don't try the last address.
|
|
if !ipv6 {
|
|
addrs[len(addrs)-1] = ""
|
|
}
|
|
|
|
for i := 0; i < len(addrs); i++ {
|
|
addr := addrs[i];
|
|
if addr == "" {
|
|
continue
|
|
}
|
|
// print(addr, "\n");
|
|
TestDial("tcp", addr);
|
|
TestDialTCP("tcp", addr);
|
|
if addr[0] != '[' {
|
|
TestDial("tcp4", addr);
|
|
TestDialTCP("tcp4", addr)
|
|
}
|
|
TestDial("tcp6", addr);
|
|
TestDialTCP("tcp6", addr)
|
|
}
|
|
}
|