Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 63 | /* |
| 64 | * Remove a protocol from the hash tables. |
| 65 | */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol) |
| 68 | { |
| 69 | int ret, hash = protocol & (MAX_INET_PROTOS - 1); |
| 70 | |
| 71 | spin_lock_bh(&inet6_proto_lock); |
| 72 | |
| 73 | if (inet6_protos[hash] != prot) { |
| 74 | ret = -1; |
| 75 | } else { |
| 76 | inet6_protos[hash] = NULL; |
| 77 | ret = 0; |
| 78 | } |
| 79 | |
| 80 | spin_unlock_bh(&inet6_proto_lock); |
| 81 | |
| 82 | synchronize_net(); |
| 83 | |
| 84 | return ret; |
| 85 | } |