/* * 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. * * 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/module.h>#include <linux/netdevice.h>#include <linux/spinlock.h>#include <net/protocol.h> const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly; int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol){	int hash = protocol & (MAX_INET_PROTOS - 1); 	return !cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],			NULL, prot) ? 0 : -1;}EXPORT_SYMBOL(inet6_add_protocol); /* *	Remove a protocol from the hash tables. */ int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol){	int ret, hash = protocol & (MAX_INET_PROTOS - 1); 	ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],		       prot, NULL) == prot) ? 0 : -1; 	synchronize_net(); 	return ret;}EXPORT_SYMBOL(inet6_del_protocol);