Cregit: Linux 6.9: nf_conntrack

Contributors: 10
Author	Tokens	Token Proportion	Commits	Commit Proportion
Harald Welte	53	54.64%	1	7.69%
Linus Torvalds (pre-git)	11	11.34%	3	23.08%
Pablo Neira Ayuso	9	9.28%	1	7.69%
Yasuyuki Kozakai	7	7.22%	1	7.69%
Jozsef Kadlecsik	5	5.15%	2	15.38%
Phil Oester	4	4.12%	1	7.69%
George Hansper	4	4.12%	1	7.69%
Arnd Bergmann	2	2.06%	1	7.69%
David Howells	1	1.03%	1	7.69%
Greg Kroah-Hartman	1	1.03%	1	7.69%
Total	97		13

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_CONNTRACK_TCP_H
#define _NF_CONNTRACK_TCP_H

#include <uapi/linux/netfilter/nf_conntrack_tcp.h>


struct ip_ct_tcp_state {
	u_int32_t	td_end;		/* max of seq + len */
	u_int32_t	td_maxend;	/* max of ack + max(win, 1) */
	u_int32_t	td_maxwin;	/* max(win) */
	u_int32_t	td_maxack;	/* max of ack */
	u_int8_t	td_scale;	/* window scale factor */
	u_int8_t	flags;		/* per direction options */
};

struct ip_ct_tcp {
	struct ip_ct_tcp_state seen[2];	/* connection parameters per direction */
	u_int8_t	state;		/* state of the connection (enum tcp_conntrack) */
	/* For detecting stale connections */
	u_int8_t	last_dir;	/* Direction of the last packet (enum ip_conntrack_dir) */
	u_int8_t	retrans;	/* Number of retransmitted packets */
	u_int8_t	last_index;	/* Index of the last packet */
	u_int32_t	last_seq;	/* Last sequence number seen in dir */
	u_int32_t	last_ack;	/* Last sequence number seen in opposite dir */
	u_int32_t	last_end;	/* Last seq + len */
	u_int16_t	last_win;	/* Last window advertisement seen in dir */
	/* For SYN packets while we may be out-of-sync */
	u_int8_t	last_wscale;	/* Last window scaling factor seen */
	u_int8_t	last_flags;	/* Last flags set */
};

#endif /* _NF_CONNTRACK_TCP_H */