1997-01-06 00:32:18 +03:00
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/* $NetBSD: ip_state.h,v 1.2 1997/01/05 21:32:25 veego Exp $ */
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1997-01-05 16:47:59 +03:00
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/*
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* (C)opyright 1995 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*
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* @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
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1997-01-06 00:32:18 +03:00
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* Id: ip_state.h,v 1.2.4.4 1996/12/02 11:52:01 darrenr Exp
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1997-01-05 16:47:59 +03:00
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*/
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#ifndef __IP_STATE_H__
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#define __IP_STATE_H__
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#define IPSTATE_SIZE 257
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#define IPSTATE_MAX 2048 /* Maximum number of states held */
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typedef struct udpstate {
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u_short us_sport;
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u_short us_dport;
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} udpstate_t;
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typedef struct icmpstate {
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u_short ics_id;
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u_short ics_seq;
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u_char ics_type;
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} icmpstate_t;
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typedef struct tcpstate {
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u_short ts_sport;
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u_short ts_dport;
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u_long ts_seq;
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u_long ts_ack;
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u_short ts_swin;
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u_short ts_dwin;
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u_char ts_state[2];
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} tcpstate_t;
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typedef struct ipstate {
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struct ipstate *is_next;
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int is_age;
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u_int is_pass;
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struct in_addr is_src;
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struct in_addr is_dst;
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u_char is_p;
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u_char is_flags;
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union {
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icmpstate_t is_ics;
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tcpstate_t is_ts;
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udpstate_t is_us;
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} is_ps;
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} ipstate_t;
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#define is_icmp is_ps.is_ics
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#define is_tcp is_ps.is_ts
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#define is_udp is_ps.is_us
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#define is_seq is_tcp.ts_seq
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#define is_ack is_tcp.ts_ack
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#define is_dwin is_tcp.ts_dwin
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#define is_swin is_tcp.ts_swin
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#define is_sport is_tcp.ts_sport
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#define is_dport is_tcp.ts_dport
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#define is_state is_tcp.ts_state
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#define TH_OPENING (TH_SYN|TH_ACK)
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typedef struct ips_stat {
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u_long iss_hits;
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u_long iss_miss;
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u_long iss_max;
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u_long iss_tcp;
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u_long iss_udp;
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u_long iss_icmp;
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u_long iss_nomem;
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u_long iss_expire;
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u_long iss_fin;
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u_long iss_active;
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ipstate_t **iss_table;
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} ips_stat_t;
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extern ips_stat_t *fr_statetstats __P((void));
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extern int fr_addstate __P((ip_t *ip, fr_info_t *fin, u_int pass));
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extern int fr_checkstate __P((ip_t *ip, fr_info_t *fin));
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extern void fr_timeoutstate __P((void));
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extern void set_tcp_age __P((int *age, u_char *state, ip_t *ip,
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fr_info_t *fin, int dir));
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# ifdef _KERNEL
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extern void fr_stateunload __P((void));
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# endif
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#endif /* __IP_STATE_H__ */
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