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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 spinlock_t inet6_proto_lock = SPIN_LOCK_UNLOCKED; 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; } |