]>
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 | * 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 | 27 | #include <linux/in6.h> |
c6b641a4 | 28 | #include <linux/skbuff.h> |
dfd56b8b | 29 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
30 | #include <linux/ipv6.h> |
31 | #endif | |
f191a1d1 | 32 | #include <linux/netdevice.h> |
1da177e4 | 33 | |
f9242b6b DM |
34 | /* This is one larger than the largest protocol value that can be |
35 | * found in an ipv4 or ipv6 header. Since in both cases the protocol | |
36 | * value is presented in a __u8, this is defined to be 256. | |
37 | */ | |
38 | #define MAX_INET_PROTOS 256 | |
1da177e4 LT |
39 | |
40 | /* This is used to register protocols. */ | |
41 | struct net_protocol { | |
7487449c PA |
42 | int (*early_demux)(struct sk_buff *skb); |
43 | int (*early_demux_handler)(struct sk_buff *skb); | |
1da177e4 | 44 | int (*handler)(struct sk_buff *skb); |
32bbd879 SB |
45 | |
46 | /* This returns an error if we weren't able to handle the error. */ | |
47 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
48 | ||
f145049a | 49 | unsigned int no_policy:1, |
8ed1dc44 HFS |
50 | netns_ok:1, |
51 | /* does the protocol do more stringent | |
52 | * icmp tag validation than simple | |
53 | * socket lookup? | |
54 | */ | |
55 | icmp_strict_tag_validation:1; | |
1da177e4 LT |
56 | }; |
57 | ||
dfd56b8b | 58 | #if IS_ENABLED(CONFIG_IPV6) |
fd2c3ef7 | 59 | struct inet6_protocol { |
c7109986 | 60 | void (*early_demux)(struct sk_buff *skb); |
dddb64bc | 61 | void (*early_demux_handler)(struct sk_buff *skb); |
e5bbef20 | 62 | int (*handler)(struct sk_buff *skb); |
1da177e4 | 63 | |
32bbd879 SB |
64 | /* This returns an error if we weren't able to handle the error. */ |
65 | int (*err_handler)(struct sk_buff *skb, | |
1da177e4 | 66 | struct inet6_skb_parm *opt, |
d5fdd6ba | 67 | u8 type, u8 code, int offset, |
04ce6909 | 68 | __be32 info); |
32bbd879 | 69 | |
1da177e4 LT |
70 | unsigned int flags; /* INET6_PROTO_xxx */ |
71 | }; | |
72 | ||
73 | #define INET6_PROTO_NOPOLICY 0x1 | |
74 | #define INET6_PROTO_FINAL 0x2 | |
75 | #endif | |
76 | ||
de27d001 | 77 | struct net_offload { |
f191a1d1 VY |
78 | struct offload_callbacks callbacks; |
79 | unsigned int flags; /* Flags used by IPv6 for now */ | |
de27d001 | 80 | }; |
c6b641a4 VY |
81 | /* This should be set for any extension header which is compatible with GSO. */ |
82 | #define INET6_PROTO_GSO_EXTHDR 0x1 | |
de27d001 | 83 | |
1da177e4 LT |
84 | /* This is used to register socket interfaces for IP protocols. */ |
85 | struct inet_protosw { | |
86 | struct list_head list; | |
87 | ||
88 | /* These two fields form the lookup key. */ | |
89 | unsigned short type; /* This is the 2nd argument to socket(2). */ | |
ee41e2df | 90 | unsigned short protocol; /* This is the L4 protocol number. */ |
1da177e4 LT |
91 | |
92 | struct proto *prot; | |
90ddc4f0 | 93 | const struct proto_ops *ops; |
1da177e4 | 94 | |
1da177e4 LT |
95 | unsigned char flags; /* See INET_PROTOSW_* below. */ |
96 | }; | |
97 | #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */ | |
98 | #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */ | |
d83d8461 | 99 | #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */ |
1da177e4 | 100 | |
dddb64bc | 101 | extern struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS]; |
de27d001 | 102 | extern const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS]; |
c6b641a4 | 103 | extern const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS]; |
1da177e4 | 104 | |
dfd56b8b | 105 | #if IS_ENABLED(CONFIG_IPV6) |
dddb64bc | 106 | extern struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS]; |
1da177e4 LT |
107 | #endif |
108 | ||
f307c636 JP |
109 | int inet_add_protocol(const struct net_protocol *prot, unsigned char num); |
110 | int inet_del_protocol(const struct net_protocol *prot, unsigned char num); | |
111 | int inet_add_offload(const struct net_offload *prot, unsigned char num); | |
112 | int inet_del_offload(const struct net_offload *prot, unsigned char num); | |
113 | void inet_register_protosw(struct inet_protosw *p); | |
114 | void inet_unregister_protosw(struct inet_protosw *p); | |
1da177e4 | 115 | |
dfd56b8b | 116 | #if IS_ENABLED(CONFIG_IPV6) |
f307c636 JP |
117 | int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num); |
118 | int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num); | |
119 | int inet6_register_protosw(struct inet_protosw *p); | |
120 | void inet6_unregister_protosw(struct inet_protosw *p); | |
1da177e4 | 121 | #endif |
f307c636 JP |
122 | int inet6_add_offload(const struct net_offload *prot, unsigned char num); |
123 | int inet6_del_offload(const struct net_offload *prot, unsigned char num); | |
1da177e4 LT |
124 | |
125 | #endif /* _PROTOCOL_H */ |