[C Language] -- C language and PHP implement local communication through af_unix

Recently, due to work needs, I learned PHP-related programming. The socket communication of PHP is needed. Originally, PHP socket communication is simpler than C language, but the server uses C code, the client uses PHP, and local communication, that is, communication is performed through local temporary files in the form of af_unix. It is relatively easy to use C language, and there are a lot of online materials. For details, refer. By referring to the PHP online reference manual, after modifying relevant parameters, You can implement C-server and PHP-Client Communication Based on af_unix. The Code is as follows:

Server

Reference: http://blog.csdn.net/ast_224/article/details/3962221

# Include <stdio. h>
# Include <sys/types. h>
# Include <sys/socket. h>
# Include <sys/UN. h>
# Define unix_domain "/tmp/Unix. Domain"
Int main (void)
{
Socklen_t clt_addr_len;
Int listen_fd;
Int com_fd;
Int ret;
Int I;
Static char recv_buf [1024];
Int Len;
Struct sockaddr_un clt_addr;
Struct sockaddr_un srv_addr;
Listen_fd = socket (pf_unix, sock_stream, 0 );
If (listen_fd <0)
{
Perror ("cannot create communication socket ");
Return 1;
}
Else
{
Printf ("socket start: \ n ");
}

// Set server addr_param
Srv_addr.sun_family = af_unix;
Strncpy (srv_addr.sun_path, unix_domain, sizeof (srv_addr.sun_path)-1 );
Unlink (unix_domain );
// Bind sockfd & ADDR
Ret = BIND (listen_fd, (struct sockaddr *) & srv_addr, sizeof (srv_addr ));
If (ret =-1)
{
Perror ("cannot bind server socket ");
Close (listen_fd );
Unlink (unix_domain );
Return 1;
}
Else
{
Printf ("bind OK \ n ");
}
// Listen sockfd
Ret = listen (listen_fd, 1 );
If (ret =-1)
{
Perror ("cannot listen the client CONNECT request ");
Close (listen_fd );
Unlink (unix_domain );
Return 1;
}
Else
{
Printf ("start to listen \ n ");
}
// Have CONNECT request use accept
Len = sizeof (clt_addr );
Com_fd = accept (listen_fd, (struct sockaddr *) & clt_addr, & Len );
If (com_fd <0)
{
Perror ("cannot accept client CONNECT request ");
Close (listen_fd );
Unlink (unix_domain );
Return 1;
}
// Read and printf sent Client info
Printf ("/n ==== info ====/N ");
For (I = 0; I <4; I ++)
{
Memset (recv_buf, 0,1024 );
Int num = read (com_fd, recv_buf, sizeof (recv_buf ));
Printf ("Message from client (% d): % s/n", num, recv_buf );
}
Close (com_fd );
Close (listen_fd );
Unlink (unix_domain );
Return 0;
}

Client:

<? PHP
Define ("unix_domain", "/tmp/Unix. Domain ");
Echo unix_domain;

$ Socket = socket_create (af_unix, sock_stream, 0); // The third parameter is 0.
If ($ socket <0)
{
Echo "socket_create () failed: reason:". socket_strerror ($ socket). "\ n ";
}
Else

{
Echo "create OK. \ n ";
}

$ Result = socket_connect ($ socket, unix_domain); // you only need two parameters.
If ($ result <0)
{
Echo "socket_connect () failed. \ nreason: ($ result)". socket_strerror ($ result). "\ n ";
}
Else

{
Echo "Connect OK ";
}

// The following code communicates with a common PHP socket
$ In = "Hello, ni hao \ n ";
If (! Socket_write ($ socket, $ in, strlen ($ in )))
{
Echo "socket_write () failed: reason:". socket_strerror ($ socket). "\ n ";
}
Else

{
Echo "Send message OK! ";
}
 
 
Echo "Close socket ...";
Socket_close ($ socket );
Echo "close OK ";
 
?>