[net-next-2.6.git] / net / ipv6 / protocol.c

/*
 * 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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* INET An implementation of the TCP/IP protocol suite for the LINUX
	3	* operating system. INET is implemented using the BSD Socket
	4	* interface as the means of communication with the user level.
	5	*
	6	* PF_INET6 protocol dispatch tables.
	7	*
	8	* Version: $Id: protocol.c,v 1.10 2001/05/18 02:25:49 davem Exp $
	9	*
	10	* Authors: Pedro Roque <roque@di.fc.ul.pt>
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation; either version
	15	* 2 of the License, or (at your option) any later version.
	16	*/
	17
	18	/*
	19	* Changes:
	20	*
	21	* Vince Laviano (vince@cs.stanford.edu) 16 May 2001
	22	* - Removed unused variable 'inet6_protocol_base'
	23	* - Modified inet6_del_protocol() to correctly maintain copy bit.
	24	*/
	25
	26	#include <linux/errno.h>
	27	#include <linux/types.h>
	28	#include <linux/socket.h>
	29	#include <linux/sockios.h>
1da177e4 LT	30	#include <linux/net.h>
	31	#include <linux/in6.h>
	32	#include <linux/netdevice.h>
	33	#include <linux/if_arp.h>
	34
	35	#include <net/sock.h>
	36	#include <net/snmp.h>
	37
	38	#include <net/ipv6.h>
	39	#include <net/protocol.h>
	40
	41	struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
	42	static DEFINE_SPINLOCK(inet6_proto_lock);
	43
	44
	45	int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol)
	46	{
	47	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
	48
	49	spin_lock_bh(&inet6_proto_lock);
	50
	51	if (inet6_protos[hash]) {
	52	ret = -1;
	53	} else {
	54	inet6_protos[hash] = prot;
	55	ret = 0;
	56	}
	57
	58	spin_unlock_bh(&inet6_proto_lock);
	59
	60	return ret;
	61	}
	62
7159039a YH	63	EXPORT_SYMBOL(inet6_add_protocol);
7159039a YH	64
1da177e4 LT	65	/*
	66	* Remove a protocol from the hash tables.
	67	*/
1ab1457c	68
1da177e4 LT	69	int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol)
	70	{
	71	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
	72
	73	spin_lock_bh(&inet6_proto_lock);
	74
	75	if (inet6_protos[hash] != prot) {
	76	ret = -1;
	77	} else {
	78	inet6_protos[hash] = NULL;
	79	ret = 0;
	80	}
	81
	82	spin_unlock_bh(&inet6_proto_lock);
	83
	84	synchronize_net();
	85
	86	return ret;
	87	}
7159039a YH	88
7159039a YH	89	EXPORT_SYMBOL(inet6_del_protocol);