我正在尝试使 php 中的点对点应用程序以与 Skype 工作方式相同的方式工作。它适用于内部地址,但是当我尝试将数据发送到我的外部地址时,消息永远不会到达那里。显然我错过了一些地址转换,但我不知道如何使用 PHP 套接字来做到这一点。可能吗?
这是我目前接收消息的代码,我首先运行它以等待一些消息:
<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Could not create socket: " . socket_strerror(socket_last_error($socket)));
socket_bind($socket, "0.0.0.0", 100) or die("Could not bind socket: " . socket_strerror(socket_last_error($socket)));
$ret = "";
$from_ip = "";
$from_port = 0;
echo "waiting...\n";
socket_recvfrom($socket, $ret, 6, 0, $from_ip, $from_port);
var_dump($ret, $from_ip, $from_port);
socket_close($socket);
然后当它等待时,我运行这段代码来发送一条消息:
<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Could not create socket: " . socket_strerror(socket_last_error($socket)));
$to_ip = "externalip"; //works with internal "127.0.0.1";
$to_port = 100;
$message = "hello!";
socket_sendto($socket, $message, strlen($message), 0, $to_ip, $to_port);
echo "sent\n";
socket_close($socket);
但它发送并退出,但第一个脚本仍在等待......现在已经有一段时间了,有人可以帮我吗?
- 编辑 -
好的,所以我已经实现了一个 stun 服务器并为它设置了端口转发,如下所示:
<?php
echo "-- STUN SERVER --\n";
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Could not create socket: " . socket_strerror(socket_last_error($socket)));
socket_bind($socket, "0.0.0.0", 5104) or die("Could not bind socket: " . socket_strerror(socket_last_error($socket)));
do {
$ret = "";
$from = "";
$port = 0;
echo "waiting...\n";
socket_recvfrom($socket, $ret, 6, 0, $from, $port);
echo "received: $ret\n";
$message = $from.":".$port;
socket_sendto($socket, $message, strlen($message), 0, $from, $port);
echo "sent: $message\n\n";
}
while (true);
并更改了我的第一个脚本以从 stun 服务器获取其 ip/端口:
<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Could not create socket: " . socket_strerror(socket_last_error($socket)));
socket_bind($socket, "0.0.0.0", 100) or die("Could not bind socket: " . socket_strerror(socket_last_error($socket)));
$ret = "";
$from = "";
$port = 0;
echo "sending info to stun server...\n";
$to_ip = "stunip";
$to_port = 5104;
$message = "get_ip";
socket_sendto($socket, $message, strlen($message), 0, $to_ip, $to_port);
echo "waiting for stun...\n";
$stuninfo = "";
socket_recvfrom($socket, $stuninfo, 25, 0, $from, $port);
var_dump($stuninfo); // i use this info in my second script
echo "waiting...\n";
socket_recvfrom($socket, $ret, 6, 0, $from, $port);
var_dump($ret, $from, $port);
socket_close($socket);
它可以从 stun 服务器获取信息并等待另一个连接,但是当我在我的第二个脚本中使用该信息时,第一个脚本仍然没有收到任何消息.. 还有我遗漏的另一个步骤吗?