Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * INET         An implementation of the TCP/IP protocol suite for the LINUX

 *              operating system.  INET is implemented using the  BSD Socket

 *              interface as the means of communication with the user level.

 *

 *              PF_INET6 protocol dispatch tables.

 *

 * Version:     $Id: protocol.c,v 1.10 2001/05/18 02:25:49 davem Exp $

 *

 * Authors:     Pedro Roque     <roque@di.fc.ul.pt>

 *

 *              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 of the License, or (at your option) any later version.

 */

/*

 *      Changes:

 *

 *      Vince Laviano (vince@cs.stanford.edu)       16 May 2001

 *      - Removed unused variable 'inet6_protocol_base'

 *      - Modified inet6_del_protocol() to correctly maintain copy bit.

 */

#include <linux/errno.h>

#include <linux/types.h>

#include <linux/socket.h>

#include <linux/sockios.h>

#include <linux/net.h>

#include <linux/in6.h>

#include <linux/netdevice.h>

#include <linux/if_arp.h>

#include <net/sock.h>

#include <net/snmp.h>

#include <net/ipv6.h>

#include <net/protocol.h>

struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];

static DEFINE_SPINLOCK(inet6_proto_lock);

int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol)

{

        int ret, hash = protocol & (MAX_INET_PROTOS - 1);

        spin_lock_bh(&inet6_proto_lock);

        if (inet6_protos[hash]) {

                ret = -1;

        } else {

                inet6_protos[hash] = prot;

                ret = 0;

        }

        spin_unlock_bh(&inet6_proto_lock);

        return ret;

}

EXPORT_SYMBOL(inet6_add_protocol);

/*

 *      Remove a protocol from the hash tables.

 */

int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol)

{

        int ret, hash = protocol & (MAX_INET_PROTOS - 1);

        spin_lock_bh(&inet6_proto_lock);

        if (inet6_protos[hash] != prot) {

                ret = -1;

        } else {

                inet6_protos[hash] = NULL;

                ret = 0;

        }

        spin_unlock_bh(&inet6_proto_lock);

        synchronize_net();

        return ret;

}

EXPORT_SYMBOL(inet6_del_protocol);