[net-next-2.6.git] / include / net / protocol.h

/*
 * 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>
#endif

#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,
			       __u32 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_NOPOLICY	0x1
#define INET6_PROTO_FINAL	0x2
/* This should be set for any extension header which is compatible with GSO. */
#define INET6_PROTO_GSO_EXTHDR	0x4
#endif

/* 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). */
	int		 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];
#endif

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 void	inet6_register_protosw(struct inet_protosw *p);
extern void	inet6_unregister_protosw(struct inet_protosw *p);
#endif

#endif	/* _PROTOCOL_H */
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 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);
a430a43d	39	int (gso_send_check)(struct sk_buff skb);
576a30eb HX	40	struct sk_buff (gso_segment)(struct sk_buff *skb,
576a30eb HX	41	int features);
1da177e4 LT	42	int no_policy;
	43	};
	44
	45	#if defined(CONFIG_IPV6) \|\| defined (CONFIG_IPV6_MODULE)
	46	struct inet6_protocol
	47	{
951dbc8a	48	int (handler)(struct sk_buff *skb);
1da177e4 LT	49
	50	void (err_handler)(struct sk_buff skb,
	51	struct inet6_skb_parm *opt,
	52	int type, int code, int offset,
	53	__u32 info);
adcfc7d0	54
a430a43d	55	int (gso_send_check)(struct sk_buff skb);
adcfc7d0 HX	56	struct sk_buff (gso_segment)(struct sk_buff *skb,
	57	int features);
	58
1da177e4 LT	59	unsigned int flags; /* INET6_PROTO_xxx */
	60	};
	61
	62	#define INET6_PROTO_NOPOLICY 0x1
	63	#define INET6_PROTO_FINAL 0x2
adcfc7d0 HX	64	/* This should be set for any extension header which is compatible with GSO. */
adcfc7d0 HX	65	#define INET6_PROTO_GSO_EXTHDR 0x4
1da177e4 LT	66	#endif
	67
	68	/* This is used to register socket interfaces for IP protocols. */
	69	struct inet_protosw {
	70	struct list_head list;
	71
	72	/* These two fields form the lookup key. */
	73	unsigned short type; /* This is the 2nd argument to socket(2). */
	74	int protocol; /* This is the L4 protocol number. */
	75
	76	struct proto *prot;
90ddc4f0	77	const struct proto_ops *ops;
1da177e4 LT	78
	79	int capability; /* Which (if any) capability do
	80	* we need to use this socket
	81	* interface?
	82	*/
	83	char no_check; /* checksum on rcv/xmit/none? */
	84	unsigned char flags; /* See INET_PROTOSW_* below. */
	85	};
	86	#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
	87	#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
d83d8461	88	#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
1da177e4 LT	89
	90	extern struct net_protocol *inet_protocol_base;
	91	extern struct net_protocol *inet_protos[MAX_INET_PROTOS];
	92
	93	#if defined(CONFIG_IPV6) \|\| defined (CONFIG_IPV6_MODULE)
	94	extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
	95	#endif
	96
	97	extern int inet_add_protocol(struct net_protocol *prot, unsigned char num);
	98	extern int inet_del_protocol(struct net_protocol *prot, unsigned char num);
	99	extern void inet_register_protosw(struct inet_protosw *p);
	100	extern void inet_unregister_protosw(struct inet_protosw *p);
	101
	102	#if defined(CONFIG_IPV6) \|\| defined (CONFIG_IPV6_MODULE)
	103	extern int inet6_add_protocol(struct inet6_protocol *prot, unsigned char num);
	104	extern int inet6_del_protocol(struct inet6_protocol *prot, unsigned char num);
	105	extern void inet6_register_protosw(struct inet_protosw *p);
	106	extern void inet6_unregister_protosw(struct inet_protosw *p);
	107	#endif
	108
	109	#endif /* _PROTOCOL_H */