projects / linux.git / blame
| 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 <[email protected]> | |
| 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 ([email protected]) 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> | |
| 30 | #include <linux/sched.h> | |
| 31 | #include <linux/net.h> | |
| 32 | #include <linux/in6.h> | |
| 33 | #include <linux/netdevice.h> | |
| 34 | #include <linux/if_arp.h> | |
| 35 | ||
| 36 | #include <net/sock.h> | |
| 37 | #include <net/snmp.h> | |
| 38 | ||
| 39 | #include <net/ipv6.h> | |
| 40 | #include <net/protocol.h> | |
| 41 | ||
| 42 | struct inet6_protocol *inet6_protos[MAX_INET_PROTOS]; | |
| 43 | static DEFINE_SPINLOCK(inet6_proto_lock); | |
| 44 | ||
| 45 | ||
| 46 | int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol) | |
| 47 | { | |
| 48 | int ret, hash = protocol & (MAX_INET_PROTOS - 1); | |
| 49 | ||
| 50 | spin_lock_bh(&inet6_proto_lock); | |
| 51 | ||
| 52 | if (inet6_protos[hash]) { | |
| 53 | ret = -1; | |
| 54 | } else { | |
| 55 | inet6_protos[hash] = prot; | |
| 56 | ret = 0; | |
| 57 | } | |
| 58 | ||
| 59 | spin_unlock_bh(&inet6_proto_lock); | |
| 60 | ||
| 61 | return ret; | |
| 62 | } | |
| 63 | ||
| 64 | /* | |
| 65 | * Remove a protocol from the hash tables. | |
| 66 | */ | |
| 1ab1457c | 67 | |
| 1da177e4 LT |
68 | int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol) |
| 69 | { | |
| 70 | int ret, hash = protocol & (MAX_INET_PROTOS - 1); | |
| 71 | ||
| 72 | spin_lock_bh(&inet6_proto_lock); | |
| 73 | ||
| 74 | if (inet6_protos[hash] != prot) { | |
| 75 | ret = -1; | |
| 76 | } else { | |
| 77 | inet6_protos[hash] = NULL; | |
| 78 | ret = 0; | |
| 79 | } | |
| 80 | ||
| 81 | spin_unlock_bh(&inet6_proto_lock); | |
| 82 | ||
| 83 | synchronize_net(); | |
| 84 | ||
| 85 | return ret; | |
| 86 | } |