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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 | * | |
1da177e4 LT |
8 | * Authors: Pedro Roque <roque@di.fc.ul.pt> |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | /* | |
17 | * Changes: | |
18 | * | |
19 | * Vince Laviano (vince@cs.stanford.edu) 16 May 2001 | |
20 | * - Removed unused variable 'inet6_protocol_base' | |
21 | * - Modified inet6_del_protocol() to correctly maintain copy bit. | |
22 | */ | |
23 | ||
24 | #include <linux/errno.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | ||
33 | #include <net/sock.h> | |
34 | #include <net/snmp.h> | |
35 | ||
36 | #include <net/ipv6.h> | |
37 | #include <net/protocol.h> | |
38 | ||
39 | struct inet6_protocol *inet6_protos[MAX_INET_PROTOS]; | |
40 | static DEFINE_SPINLOCK(inet6_proto_lock); | |
41 | ||
42 | ||
43 | int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol) | |
44 | { | |
45 | int ret, hash = protocol & (MAX_INET_PROTOS - 1); | |
46 | ||
47 | spin_lock_bh(&inet6_proto_lock); | |
48 | ||
49 | if (inet6_protos[hash]) { | |
50 | ret = -1; | |
51 | } else { | |
52 | inet6_protos[hash] = prot; | |
53 | ret = 0; | |
54 | } | |
55 | ||
56 | spin_unlock_bh(&inet6_proto_lock); | |
57 | ||
58 | return ret; | |
59 | } | |
60 | ||
7159039a YH |
61 | EXPORT_SYMBOL(inet6_add_protocol); |
62 | ||
1da177e4 LT |
63 | /* |
64 | * Remove a protocol from the hash tables. | |
65 | */ | |
1ab1457c | 66 | |
1da177e4 LT |
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 | } | |
7159039a YH |
86 | |
87 | EXPORT_SYMBOL(inet6_del_protocol); |