/* * 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 */