[deliverable/linux.git] / include / net / netfilter / nf_conntrack_seqadj.h

#ifndef _NF_CONNTRACK_SEQADJ_H
#define _NF_CONNTRACK_SEQADJ_H

#include <net/netfilter/nf_conntrack_extend.h>

/**
 * struct nf_ct_seqadj - sequence number adjustment information
 *
 * @correction_pos: position of the last TCP sequence number modification
 * @offset_before: sequence number offset before last modification
 * @offset_after: sequence number offset after last modification
 */
struct nf_ct_seqadj {
	u32		correction_pos;
	s32		offset_before;
	s32		offset_after;
};

struct nf_conn_seqadj {
	struct nf_ct_seqadj	seq[IP_CT_DIR_MAX];
};

static inline struct nf_conn_seqadj *nfct_seqadj(const struct nf_conn *ct)
{
	return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ);
}

static inline struct nf_conn_seqadj *nfct_seqadj_ext_add(struct nf_conn *ct)
{
	return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC);
}

int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
		      s32 off);
int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
		     __be32 seq, s32 off);
void nf_ct_tcp_seqadj_set(struct sk_buff *skb, struct nf_conn *ct,
			  enum ip_conntrack_info ctinfo, s32 off);

int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
		     enum ip_conntrack_info ctinfo, unsigned int protoff);
s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);

int nf_conntrack_seqadj_init(void);
void nf_conntrack_seqadj_fini(void);

#endif /* _NF_CONNTRACK_SEQADJ_H */
Commit	Line	Data
41d73ec0 PM	1	#ifndef _NF_CONNTRACK_SEQADJ_H
	2	#define _NF_CONNTRACK_SEQADJ_H
	3
	4	#include <net/netfilter/nf_conntrack_extend.h>
	5
	6	/**
	7	* struct nf_ct_seqadj - sequence number adjustment information
	8	*
	9	* @correction_pos: position of the last TCP sequence number modification
	10	* @offset_before: sequence number offset before last modification
	11	* @offset_after: sequence number offset after last modification
	12	*/
	13	struct nf_ct_seqadj {
	14	u32 correction_pos;
	15	s32 offset_before;
	16	s32 offset_after;
	17	};
	18
	19	struct nf_conn_seqadj {
	20	struct nf_ct_seqadj seq[IP_CT_DIR_MAX];
	21	};
	22
	23	static inline struct nf_conn_seqadj nfct_seqadj(const struct nf_conn ct)
	24	{
	25	return nf_ct_ext_find(ct, NF_CT_EXT_SEQADJ);
	26	}
	27
	28	static inline struct nf_conn_seqadj nfct_seqadj_ext_add(struct nf_conn ct)
	29	{
	30	return nf_ct_ext_add(ct, NF_CT_EXT_SEQADJ, GFP_ATOMIC);
	31	}
	32
4e77be46 JP	33	int nf_ct_seqadj_init(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
	34	s32 off);
	35	int nf_ct_seqadj_set(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
	36	__be32 seq, s32 off);
	37	void nf_ct_tcp_seqadj_set(struct sk_buff skb, struct nf_conn ct,
	38	enum ip_conntrack_info ctinfo, s32 off);
	39
	40	int nf_ct_seq_adjust(struct sk_buff skb, struct nf_conn ct,
	41	enum ip_conntrack_info ctinfo, unsigned int protoff);
	42	s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);
	43
	44	int nf_conntrack_seqadj_init(void);
	45	void nf_conntrack_seqadj_fini(void);
41d73ec0 PM	46
41d73ec0 PM	47	#endif /* _NF_CONNTRACK_SEQADJ_H */