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 * Definitions for the protocol dispatcher.
7 *
8 * Version: @(#)protocol.h 1.0.2 05/07/93
9 *
10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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 * Changes:
18 * Alan Cox : Added a name field and a frag handler
19 * field for later.
20 * Alan Cox : Cleaned up, and sorted types.
21 * Pedro Roque : inet6 protocols
22 */
23
24 #ifndef _PROTOCOL_H
25 #define _PROTOCOL_H
26
27 #include <linux/config.h>
28 #include <linux/in6.h>
29 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
30 #include <linux/ipv6.h>
31 #endif
32
33 #define MAX_INET_PROTOS 32 /* Must be a power of 2 */
34
35
36 /* This is used to register protocols. */
37 struct inet_protocol
38 {
39 int (*handler)(struct sk_buff *skb, unsigned short len);
40 void (*err_handler)(struct sk_buff *skb, unsigned char *dp, int len);
41 struct inet_protocol *next;
42 unsigned char protocol;
43 unsigned char copy:1;
44 void *data;
45 const char *name;
46 };
47
48 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
49 struct inet6_protocol
50 {
51 int (*handler)(struct sk_buff *skb,
52 unsigned long len);
53
54 void (*err_handler)(struct sk_buff *skb, struct ipv6hdr *hdr,
55 struct inet6_skb_parm *opt,
56 int type, int code, unsigned char *buff,
57 __u32 info);
58 struct inet6_protocol *next;
59 unsigned char protocol;
60 unsigned char copy:1;
61 void *data;
62 const char *name;
63 };
64
65 #endif
66
67 extern struct inet_protocol *inet_protocol_base;
68 extern struct inet_protocol *inet_protos[MAX_INET_PROTOS];
69
70 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
71 extern struct inet6_protocol *inet6_protocol_base;
72 extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
73 #endif
74
75 extern void inet_add_protocol(struct inet_protocol *prot);
76 extern int inet_del_protocol(struct inet_protocol *prot);
77
78 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
79 extern void inet6_add_protocol(struct inet6_protocol *prot);
80 extern int inet6_del_protocol(struct inet6_protocol *prot);
81 #endif
82
83 #endif /* _PROTOCOL_H */
84
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