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* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
* Definitions for the protocol dispatcher.
* Version: @(#)protocol.h 1.0.2 05/07/93
* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* Changes:
* Alan Cox : Added a name field and a frag handler
* field for later.
* Alan Cox : Cleaned up, and sorted types.
* Pedro Roque : inet6 protocols
#ifndef _PROTOCOL_H
#define _PROTOCOL_H
#include <linux/in6.h>
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
#include <linux/ipv6.h>
#define MAX_INET_PROTOS 256 /* Must be a power of 2 */
/* This is used to register protocols. */
struct net_protocol {
int (*handler)(struct sk_buff *skb);
void (*err_handler)(struct sk_buff *skb, u32 info);
int (*gso_send_check)(struct sk_buff *skb);
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
int features);
int no_policy;
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
struct inet6_protocol
int (*handler)(struct sk_buff *skb);
void (*err_handler)(struct sk_buff *skb,
struct inet6_skb_parm *opt,
int type, int code, int offset,
__be32 info);
int (*gso_send_check)(struct sk_buff *skb);
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
int features);
unsigned int flags; /* INET6_PROTO_xxx */
#define INET6_PROTO_FINAL 0x2
/* This should be set for any extension header which is compatible with GSO. */
/* This is used to register socket interfaces for IP protocols. */
struct inet_protosw {
struct list_head list;
/* These two fields form the lookup key. */
unsigned short type; /* This is the 2nd argument to socket(2). */
unsigned short protocol; /* This is the L4 protocol number. */
struct proto *prot;
const struct proto_ops *ops;
int capability; /* Which (if any) capability do
* we need to use this socket
* interface?
char no_check; /* checksum on rcv/xmit/none? */
unsigned char flags; /* See INET_PROTOSW_* below. */
#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
extern struct net_protocol *inet_protocol_base;
extern struct net_protocol *inet_protos[MAX_INET_PROTOS];
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
extern int inet_add_protocol(struct net_protocol *prot, unsigned char num);
extern int inet_del_protocol(struct net_protocol *prot, unsigned char num);
extern void inet_register_protosw(struct inet_protosw *p);
extern void inet_unregister_protosw(struct inet_protosw *p);
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
extern int inet6_add_protocol(struct inet6_protocol *prot, unsigned char num);
extern int inet6_del_protocol(struct inet6_protocol *prot, unsigned char num);
extern int inet6_register_protosw(struct inet_protosw *p);
extern void inet6_unregister_protosw(struct inet_protosw *p);
#endif /* _PROTOCOL_H */