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/*
* 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/sched.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;
}
/*
* 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;
}