[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);
	struct sk_buff	      **(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
	unsigned int		no_policy:1,
				netns_ok:1;
};

#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,
			       u8 type, u8 code, int offset,
			       __be32 info);

	int	(*gso_send_check)(struct sk_buff *skb);
	struct sk_buff *(*gso_segment)(struct sk_buff *skb,
				       int features);
	struct sk_buff **(*gro_receive)(struct sk_buff **head,
					struct sk_buff *skb);
	int	(*gro_complete)(struct sk_buff *skb);

	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). */
	unsigned short	 protocol; /* This is the L4 protocol number.  */

	struct proto	 *prot;
	const struct proto_ops *ops;
  
	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 const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];

#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
#endif

extern int	inet_add_protocol(const struct net_protocol *prot, unsigned char num);
extern int	inet_del_protocol(const 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(const struct inet6_protocol *prot, unsigned char num);
extern int	inet6_del_protocol(const 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

#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);
73cc19f1 HX	42	struct sk_buff *(gro_receive)(struct sk_buff **head,
	43	struct sk_buff *skb);
	44	int (gro_complete)(struct sk_buff skb);
f145049a DL	45	unsigned int no_policy:1,
f145049a DL	46	netns_ok:1;
1da177e4 LT	47	};
	48
	49	#if defined(CONFIG_IPV6) \|\| defined (CONFIG_IPV6_MODULE)
fd2c3ef7	50	struct inet6_protocol {
e5bbef20	51	int (handler)(struct sk_buff skb);
1da177e4 LT	52
	53	void (err_handler)(struct sk_buff skb,
	54	struct inet6_skb_parm *opt,
d5fdd6ba	55	u8 type, u8 code, int offset,
04ce6909	56	__be32 info);
adcfc7d0	57
a430a43d	58	int (gso_send_check)(struct sk_buff skb);
adcfc7d0 HX	59	struct sk_buff (gso_segment)(struct sk_buff *skb,
adcfc7d0 HX	60	int features);
787e9208 HX	61	struct sk_buff *(gro_receive)(struct sk_buff **head,
	62	struct sk_buff *skb);
	63	int (gro_complete)(struct sk_buff skb);
adcfc7d0	64
1da177e4 LT	65	unsigned int flags; /* INET6_PROTO_xxx */
	66	};
	67
	68	#define INET6_PROTO_NOPOLICY 0x1
	69	#define INET6_PROTO_FINAL 0x2
adcfc7d0 HX	70	/* This should be set for any extension header which is compatible with GSO. */
adcfc7d0 HX	71	#define INET6_PROTO_GSO_EXTHDR 0x4
1da177e4 LT	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). */
ee41e2df	80	unsigned short protocol; /* This is the L4 protocol number. */
1da177e4 LT	81
1da177e4 LT	82	struct proto *prot;
90ddc4f0	83	const struct proto_ops *ops;
1da177e4	84
1da177e4 LT	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. */
d83d8461	90	#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
1da177e4	91
e0ad61ec	92	extern const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS];
1da177e4 LT	93
1da177e4 LT	94	#if defined(CONFIG_IPV6) \|\| defined (CONFIG_IPV6_MODULE)
e0ad61ec	95	extern const struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS];
1da177e4 LT	96	#endif
1da177e4 LT	97
32613090 AD	98	extern int inet_add_protocol(const struct net_protocol *prot, unsigned char num);
32613090 AD	99	extern int inet_del_protocol(const struct net_protocol *prot, unsigned char num);
1da177e4 LT	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)
41135cc8 AD	104	extern int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
41135cc8 AD	105	extern int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
87c3efbf	106	extern int inet6_register_protosw(struct inet_protosw *p);
1da177e4 LT	107	extern void inet6_unregister_protosw(struct inet_protosw *p);
	108	#endif
	109
	110	#endif /* _PROTOCOL_H */