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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/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); |
39 | int (*gso_send_check)(struct sk_buff *skb); |
40 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
41 | u32 features); |
42 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
43 | struct sk_buff *skb); |
44 | int (*gro_complete)(struct sk_buff *skb); |
45 | unsigned int no_policy:1, |
46 | netns_ok:1; |
47 | }; |
48 | |
49 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
50 | struct inet6_protocol { |
51 | int (*handler)(struct sk_buff *skb); |
52 | |
53 | void (*err_handler)(struct sk_buff *skb, |
54 | struct inet6_skb_parm *opt, |
55 | u8 type, u8 code, int offset, |
56 | __be32 info); |
57 | |
58 | int (*gso_send_check)(struct sk_buff *skb); |
59 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
60 | u32 features); |
61 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
62 | struct sk_buff *skb); |
63 | int (*gro_complete)(struct sk_buff *skb); |
64 | |
65 | unsigned int flags; /* INET6_PROTO_xxx */ |
66 | }; |
67 | |
68 | #define INET6_PROTO_NOPOLICY 0x1 |
69 | #define INET6_PROTO_FINAL 0x2 |
70 | /* This should be set for any extension header which is compatible with GSO. */ |
71 | #define INET6_PROTO_GSO_EXTHDR 0x4 |
72 | #endif |
73 | |
74 | /* This is used to register socket interfaces for IP protocols. */ |
75 | struct inet_protosw { |
76 | struct list_head list; |
77 | |
78 | /* These two fields form the lookup key. */ |
79 | unsigned short type; /* This is the 2nd argument to socket(2). */ |
80 | unsigned short protocol; /* This is the L4 protocol number. */ |
81 | |
82 | struct proto *prot; |
83 | const struct proto_ops *ops; |
84 | |
85 | char no_check; /* checksum on rcv/xmit/none? */ |
86 | unsigned char flags; /* See INET_PROTOSW_* below. */ |
87 | }; |
88 | #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ |
89 | #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ |
90 | #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ |
91 | |
92 | extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS]; |
93 | |
94 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
95 | extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS]; |
96 | #endif |
97 | |
98 | extern int inet_add_protocol(const struct net_protocol *prot, unsigned char num); |
99 | extern int inet_del_protocol(const struct net_protocol *prot, unsigned char num); |
100 | extern void inet_register_protosw(struct inet_protosw *p); |
101 | extern void inet_unregister_protosw(struct inet_protosw *p); |
102 | |
103 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
104 | extern int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num); |
105 | extern int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num); |
106 | extern int inet6_register_protosw(struct inet_protosw *p); |
107 | extern void inet6_unregister_protosw(struct inet_protosw *p); |
108 | #endif |
109 | |
110 | #endif /* _PROTOCOL_H */ |
111 |
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