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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 | * 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 | ||
1da177e4 LT |
27 | #include <linux/in6.h> |
28 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
29 | #include <linux/ipv6.h> | |
30 | #endif | |
31 | ||
32 | #define MAX_INET_PROTOS 256 /* Must be a power of 2 */ | |
33 | ||
34 | ||
35 | /* This is used to register protocols. */ | |
36 | struct net_protocol { | |
37 | int (*handler)(struct sk_buff *skb); | |
38 | void (*err_handler)(struct sk_buff *skb, u32 info); | |
576a30eb HX |
39 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
40 | int features); | |
1da177e4 LT |
41 | int no_policy; |
42 | }; | |
43 | ||
44 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
45 | struct inet6_protocol | |
46 | { | |
951dbc8a | 47 | int (*handler)(struct sk_buff **skb); |
1da177e4 LT |
48 | |
49 | void (*err_handler)(struct sk_buff *skb, | |
50 | struct inet6_skb_parm *opt, | |
51 | int type, int code, int offset, | |
52 | __u32 info); | |
adcfc7d0 HX |
53 | |
54 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, | |
55 | int features); | |
56 | ||
1da177e4 LT |
57 | unsigned int flags; /* INET6_PROTO_xxx */ |
58 | }; | |
59 | ||
60 | #define INET6_PROTO_NOPOLICY 0x1 | |
61 | #define INET6_PROTO_FINAL 0x2 | |
adcfc7d0 HX |
62 | /* This should be set for any extension header which is compatible with GSO. */ |
63 | #define INET6_PROTO_GSO_EXTHDR 0x4 | |
1da177e4 LT |
64 | #endif |
65 | ||
66 | /* This is used to register socket interfaces for IP protocols. */ | |
67 | struct inet_protosw { | |
68 | struct list_head list; | |
69 | ||
70 | /* These two fields form the lookup key. */ | |
71 | unsigned short type; /* This is the 2nd argument to socket(2). */ | |
72 | int protocol; /* This is the L4 protocol number. */ | |
73 | ||
74 | struct proto *prot; | |
90ddc4f0 | 75 | const struct proto_ops *ops; |
1da177e4 LT |
76 | |
77 | int capability; /* Which (if any) capability do | |
78 | * we need to use this socket | |
79 | * interface? | |
80 | */ | |
81 | char no_check; /* checksum on rcv/xmit/none? */ | |
82 | unsigned char flags; /* See INET_PROTOSW_* below. */ | |
83 | }; | |
84 | #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ | |
85 | #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ | |
d83d8461 | 86 | #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ |
1da177e4 LT |
87 | |
88 | extern struct net_protocol *inet_protocol_base; | |
89 | extern struct net_protocol *inet_protos[MAX_INET_PROTOS]; | |
90 | ||
91 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
92 | extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS]; | |
93 | #endif | |
94 | ||
95 | extern int inet_add_protocol(struct net_protocol *prot, unsigned char num); | |
96 | extern int inet_del_protocol(struct net_protocol *prot, unsigned char num); | |
97 | extern void inet_register_protosw(struct inet_protosw *p); | |
98 | extern void inet_unregister_protosw(struct inet_protosw *p); | |
99 | ||
100 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
101 | extern int inet6_add_protocol(struct inet6_protocol *prot, unsigned char num); | |
102 | extern int inet6_del_protocol(struct inet6_protocol *prot, unsigned char num); | |
103 | extern void inet6_register_protosw(struct inet_protosw *p); | |
104 | extern void inet6_unregister_protosw(struct inet_protosw *p); | |
105 | #endif | |
106 | ||
107 | #endif /* _PROTOCOL_H */ |