SOCK_STREAM运行得很好，但是PHP SOCK_RAW却不行。有人举过例子吗？

Question

因此，我已经用这段代码测试了套接字，它正在运行精细 (SOCK_STREAM)。

   <?php    
        set_time_limit(0);
        
        $sock = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket \n");
        $result = socket_bind($sock, $host, $port) or die("Could not bind to socket \n");
        
        $result = socket_listen($sock, 3) or die("Dould not set up socket listener \n");
        echo "Listening for connection \n";
        
        // LOOP FOREVER
        do {
                $accept = socket_accept($sock) or die ("Could not accept incoming connection \n");
                $msg = socket_read($accept, 100000) or die("Could not read input \n");
        
                echo "Client says: " . $msg . "\n\n\n";
        
        } while(true);
        
        socket_close($accept, $sock);

但问题是当我试图将socket_create()更改为SOCK_RAW时

$sock = socket_create(AF_INET, SOCK_RAW, 1) or die("Could not create socket \n");

或

$sock = socket_create(AF_INET, SOCK_RAW, 0) or die("Could not create socket \n");

或

$sock = socket_create(AF_INET, SOCK_RAW, getprotobyname('icmp')) or die("Could not create socket \n");

我有以下错误：

PHP Warning:  socket_listen(): unable to listen on socket [10045]: The attempted operation is not supported for the type of object referenced in C:\xampp\htdocs\wialon php script\server.php on line 10

Warning: socket_listen(): unable to listen on socket [10045]: The attempted operation is not supported for the type of object referenced in C:\xampp\htdocs\wialon php script\server.php on line 10
Dould not set up socket listener

请帮帮忙。提前谢谢你。

Answer 1

不能对原始套接字使用socket_listen() (扩展为socket_accept())。它们只对面向连接(即: TCP等)套接字有意义。PHP文档甚至这样说：

https://www.php.net/manual/en/function.socket-listen.php

socket_listen()只适用于SOCK_STREAM或SOCK_SEQPACKET类型的套接字。

https://www.php.net/manual/en/function.socket-accept.php

在使用socket_listen()，创建套接字socket之后，将其绑定到带有socket_bind()、并被告知侦听与 socket_create()的连接的名称之后，该函数将在该套接字上接受传入的连接。