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/* $OpenBSD: ip_state.h,v 1.5 1997/06/23 19:03:51 kstailey Exp $ */
/*
* (C)opyright 1995 by Darren Reed.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and due credit is given
* to the original author and the contributors.
*
* @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
* $DRId: ip_state.h,v 2.0.1.2 1997/03/20 10:20:53 darrenr Exp $
*/
#ifndef __IP_STATE_H__
#define __IP_STATE_H__
#define IPSTATE_SIZE 257
#define IPSTATE_MAX 2048 /* Maximum number of states held */
typedef struct udpstate {
u_short us_sport;
u_short us_dport;
} udpstate_t;
typedef struct icmpstate {
u_short ics_id;
u_short ics_seq;
u_char ics_type;
} icmpstate_t;
typedef struct tcpstate {
u_short ts_sport;
u_short ts_dport;
u_long ts_seq;
u_long ts_ack;
u_short ts_swin;
u_short ts_dwin;
u_char ts_state[2];
} tcpstate_t;
typedef struct ipstate {
struct ipstate *is_next;
u_long is_age;
u_int is_pass;
struct in_addr is_src;
struct in_addr is_dst;
u_char is_p;
u_char is_flags;
union {
icmpstate_t is_ics;
tcpstate_t is_ts;
udpstate_t is_us;
} is_ps;
} ipstate_t;
#define is_icmp is_ps.is_ics
#define is_tcp is_ps.is_ts
#define is_udp is_ps.is_us
#define is_seq is_tcp.ts_seq
#define is_ack is_tcp.ts_ack
#define is_dwin is_tcp.ts_dwin
#define is_swin is_tcp.ts_swin
#define is_sport is_tcp.ts_sport
#define is_dport is_tcp.ts_dport
#define is_state is_tcp.ts_state
#define TH_OPENING (TH_SYN|TH_ACK)
typedef struct ips_stat {
u_long iss_hits;
u_long iss_miss;
u_long iss_max;
u_long iss_tcp;
u_long iss_udp;
u_long iss_icmp;
u_long iss_nomem;
u_long iss_expire;
u_long iss_fin;
u_long iss_active;
ipstate_t **iss_table;
} ips_stat_t;
extern ips_stat_t *fr_statetstats __P((void));
extern int fr_addstate __P((ip_t *, fr_info_t *, u_int));
extern int fr_checkstate __P((ip_t *, fr_info_t *));
extern void fr_timeoutstate __P((void));
extern void set_tcp_age __P((long *, u_char *, ip_t *, fr_info_t *, int));
# ifdef _KERNEL
extern void fr_stateunload __P((void));
# endif
#endif /* __IP_STATE_H__ */
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