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/*

kHTTPd -- the next generation

Basic socket functions

*/

/****************************************************************

 *      This program is free software; you can redistribute it and/or modify

 *      it under the terms of the GNU General Public License as published by

 *      the Free Software Foundation; either version 2, or (at your option)

 *      any later version.

 *

 *      This program is distributed in the hope that it will be useful,

 *      but WITHOUT ANY WARRANTY; without even the implied warranty of

 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *      GNU General Public License for more details.

 *

 *      You should have received a copy of the GNU General Public License

 *      along with this program; if not, write to the Free Software

 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 ****************************************************************/

#include "prototypes.h"

#include <linux/kernel.h>

#include <linux/net.h>

#include <linux/version.h>

#include <linux/smp_lock.h>

#include <net/sock.h>

/*

MainSocket is shared by all threads, therefore it has to be

a global variable.

*/

struct socket *MainSocket=NULL;

int StartListening(const int Port)

{

        struct socket *sock;

        struct sockaddr_in sin;

        int error;

        EnterFunction("StartListening");

        /* First create a socket */

        error = sock_create(PF_INET,SOCK_STREAM,IPPROTO_TCP,&sock);

        if (error<0)

             (void)printk(KERN_ERR "Error during creation of socket; terminating\n");

        /* Now bind the socket */

        sin.sin_family       = AF_INET;

        sin.sin_addr.s_addr  = INADDR_ANY;

        sin.sin_port         = htons((unsigned short)Port);

        error = sock->ops->bind(sock,(struct sockaddr*)&sin,sizeof(sin));

        if (error<0)

        {

                (void)printk(KERN_ERR "kHTTPd: Error binding socket. This means that some other \n");

                (void)printk(KERN_ERR "        daemon is (or was a short time ago) using port %i.\n",Port);

                return 0;

        }

        /* Grrr... setsockopt() does this. */

        sock->sk->reuse   = 1;

        /* Now, start listening on the socket */

        /* I have no idea what a sane backlog-value is. 48 works so far. */

        error=sock->ops->listen(sock,48);

        if (error!=0)

                (void)printk(KERN_ERR "kHTTPd: Error listening on socket \n");

        MainSocket = sock;

        LeaveFunction("StartListening");

        return 1;

}

void StopListening(void)

{

        struct socket *sock;

        EnterFunction("StopListening");

        if (MainSocket==NULL) return;

        sock=MainSocket;

        MainSocket = NULL;

        sock_release(sock);

        LeaveFunction("StopListening");

}