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.
6 * Definitions for the protocol dispatcher.
8 * Version: @(#)protocol.h 1.0.2 05/07/93
10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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.
18 * Alan Cox : Added a name field and a frag handler
20 * Alan Cox : Cleaned up, and sorted types.
21 * Pedro Roque : inet6 protocols
27 #include <linux/in6.h>
28 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
29 #include <linux/ipv6.h>
32 #define MAX_INET_PROTOS 256 /* Must be a power of 2 */
35 /* This is used to register protocols. */
37 int (*handler)(struct sk_buff *skb);
38 void (*err_handler)(struct sk_buff *skb, u32 info);
39 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
44 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
47 int (*handler)(struct sk_buff **skb);
49 void (*err_handler)(struct sk_buff *skb,
50 struct inet6_skb_parm *opt,
51 int type, int code, int offset,
54 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
57 unsigned int flags; /* INET6_PROTO_xxx */
60 #define INET6_PROTO_NOPOLICY 0x1
61 #define INET6_PROTO_FINAL 0x2
62 /* This should be set for any extension header which is compatible with GSO. */
63 #define INET6_PROTO_GSO_EXTHDR 0x4
66 /* This is used to register socket interfaces for IP protocols. */
68 struct list_head list;
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. */
75 const struct proto_ops *ops;
77 int capability; /* Which (if any) capability do
78 * we need to use this socket
81 char no_check; /* checksum on rcv/xmit/none? */
82 unsigned char flags; /* See INET_PROTOSW_* below. */
84 #define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
85 #define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
86 #define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
88 extern struct net_protocol *inet_protocol_base;
89 extern struct net_protocol *inet_protos[MAX_INET_PROTOS];
91 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
92 extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
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);
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);
107 #endif /* _PROTOCOL_H */