WebSVN - shark - Blame - Rev 423 - /shark/trunk/drivers/linuxc26/include/linux/netfilter_ipv4/ip

Rev	Author	Line No.	Line
423	giacomo	1	#ifndef _IP_NAT_H
		2	#define _IP_NAT_H
		3	#include <linux/netfilter_ipv4.h>
		4	#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
		5
		6	#define IP_NAT_MAPPING_TYPE_MAX_NAMELEN 16
		7
		8	enum ip_nat_manip_type
		9	{
		10	IP_NAT_MANIP_SRC,
		11	IP_NAT_MANIP_DST
		12	};
		13
		14	#ifndef CONFIG_IP_NF_NAT_LOCAL
		15	/* SRC manip occurs only on POST_ROUTING */
		16	#define HOOK2MANIP(hooknum) ((hooknum) != NF_IP_POST_ROUTING)
		17	#else
		18	/* SRC manip occurs POST_ROUTING or LOCAL_IN */
		19	#define HOOK2MANIP(hooknum) ((hooknum) != NF_IP_POST_ROUTING && (hooknum) != NF_IP_LOCAL_IN)
		20	#endif
		21
		22	#define IP_NAT_RANGE_MAP_IPS 1
		23	#define IP_NAT_RANGE_PROTO_SPECIFIED 2
		24	/* Used internally by get_unique_tuple(). */
		25	#define IP_NAT_RANGE_FULL 4
		26
		27	/* NAT sequence number modifications */
		28	struct ip_nat_seq {
		29	/* position of the last TCP sequence number
		30	* modification (if any) */
		31	u_int32_t correction_pos;
		32	/* sequence number offset before and after last modification */
		33	int32_t offset_before, offset_after;
		34	};
		35
		36	/* Single range specification. */
		37	struct ip_nat_range
		38	{
		39	/* Set to OR of flags above. */
		40	unsigned int flags;
		41
		42	/* Inclusive: network order. */
		43	u_int32_t min_ip, max_ip;
		44
		45	/* Inclusive: network order */
		46	union ip_conntrack_manip_proto min, max;
		47	};
		48
		49	/* A range consists of an array of 1 or more ip_nat_range */
		50	struct ip_nat_multi_range
		51	{
		52	unsigned int rangesize;
		53
		54	/* hangs off end. */
		55	struct ip_nat_range range[1];
		56	};
		57
		58	/* Worst case: local-out manip + 1 post-routing, and reverse dirn. */
		59	#define IP_NAT_MAX_MANIPS (2*3)
		60
		61	struct ip_nat_info_manip
		62	{
		63	/* The direction. */
		64	u_int8_t direction;
		65
		66	/* Which hook the manipulation happens on. */
		67	u_int8_t hooknum;
		68
		69	/* The manipulation type. */
		70	u_int8_t maniptype;
		71
		72	/* Manipulations to occur at each conntrack in this dirn. */
		73	struct ip_conntrack_manip manip;
		74	};
		75
		76	#ifdef __KERNEL__
		77	#include <linux/list.h>
		78	#include <linux/netfilter_ipv4/lockhelp.h>
		79
		80	/* Protects NAT hash tables, and NAT-private part of conntracks. */
		81	DECLARE_RWLOCK_EXTERN(ip_nat_lock);
		82
		83	/* Hashes for by-source and IP/protocol. */
		84	struct ip_nat_hash
		85	{
		86	struct list_head list;
		87
		88	/* conntrack we're embedded in: NULL if not in hash. */
		89	struct ip_conntrack *conntrack;
		90	};
		91
		92	/* The structure embedded in the conntrack structure. */
		93	struct ip_nat_info
		94	{
		95	/* Set to zero when conntrack created: bitmask of maniptypes */
		96	int initialized;
		97
		98	unsigned int num_manips;
		99
		100	/* Manipulations to be done on this conntrack. */
		101	struct ip_nat_info_manip manips[IP_NAT_MAX_MANIPS];
		102
		103	/* The mapping type which created us (NULL for null mapping). */
		104	const struct ip_nat_mapping_type *mtype;
		105
		106	struct ip_nat_hash bysource, byipsproto;
		107
		108	/* Helper (NULL if none). */
		109	struct ip_nat_helper *helper;
		110
		111	struct ip_nat_seq seq[IP_CT_DIR_MAX];
		112	};
		113
		114	/* Set up the info structure to map into this range. */
		115	extern unsigned int ip_nat_setup_info(struct ip_conntrack *conntrack,
		116	const struct ip_nat_multi_range *mr,
		117	unsigned int hooknum);
		118
		119	/* Is this tuple already taken? (not by us)*/
		120	extern int ip_nat_used_tuple(const struct ip_conntrack_tuple *tuple,
		121	const struct ip_conntrack *ignored_conntrack);
		122
		123	/* Calculate relative checksum. */
		124	extern u_int16_t ip_nat_cheat_check(u_int32_t oldvalinv,
		125	u_int32_t newval,
		126	u_int16_t oldcheck);
		127	#endif /__KERNEL__/
		128	#endif

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(root)/shark/trunk/drivers/linuxc26/include/linux/netfilter_ipv4/ip_nat.h - Rev 423