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/* $OpenBSD: ip_state.h,v 1.14 2000/04/13 17:13:42 kjell Exp $ */
/*
* Copyright (C) 1995-1998 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
* $IPFilter: ip_state.h,v 2.1.2.4 2000/02/23 15:23:27 darrenr Exp $
*/
#ifndef __IP_STATE_H__
#define __IP_STATE_H__
#ifndef IPSTATE_SIZE
# define IPSTATE_SIZE 257
#endif
#ifndef IPSTATE_MAX
# define IPSTATE_MAX 2048 /* Maximum number of states held */
#endif
#define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
(((s1) == (d2)) && ((d1) == (s2))))
#define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
(s2).s_addr, (d2).s_addr)
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 tcpdata {
u_32_t td_end;
u_32_t td_maxend;
u_short td_maxwin;
} tcpdata_t;
typedef struct tcpstate {
u_short ts_sport;
u_short ts_dport;
tcpdata_t ts_data[2];
u_char ts_state[2];
} tcpstate_t;
typedef struct ipstate {
struct ipstate *is_next;
u_long is_age;
u_int is_pass;
U_QUAD_T is_pkts;
U_QUAD_T is_bytes;
void *is_ifpin;
void *is_ifpout;
frentry_t *is_rule;
struct in_addr is_src;
struct in_addr is_dst;
u_char is_p; /* Protocol */
u_32_t is_flags;
u_32_t is_opt; /* packet options set */
u_32_t is_optmsk; /* " " mask */
u_short is_sec; /* security options set */
u_short is_secmsk; /* " " mask */
u_short is_auth; /* authentication options set */
u_short is_authmsk; /* " " mask */
union {
icmpstate_t is_ics;
tcpstate_t is_ts;
udpstate_t is_us;
} is_ps;
char is_ifname[2][IFNAMSIZ];
} ipstate_t;
#define is_icmp is_ps.is_ics
#define is_type is_icmp.ics_type
#define is_code is_icmp.ics_code
#define is_tcp is_ps.is_ts
#define is_udp is_ps.is_us
#define is_send is_tcp.ts_data[0].td_end
#define is_dend is_tcp.ts_data[1].td_end
#define is_maxswin is_tcp.ts_data[0].td_maxwin
#define is_maxdwin is_tcp.ts_data[1].td_maxwin
#define is_maxsend is_tcp.ts_data[0].td_maxend
#define is_maxdend is_tcp.ts_data[1].td_maxend
#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)
/*
* is_flags:
* Bits 0 - 3 are use as a mask with the current packet's bits to check for
* whether it is short, tcp/udp, a fragment or the presence of IP options.
* Bits 4 - 7 are set from the initial packet and contain what the packet
* anded with bits 0-3 must match.
* Bits 8,9 are used to indicate wildcard source/destination port matching.
*/
typedef struct ipslog {
U_QUAD_T isl_pkts;
U_QUAD_T isl_bytes;
struct in_addr isl_src;
struct in_addr isl_dst;
u_char isl_p;
u_char isl_flags;
u_char isl_state[2];
u_short isl_type;
union {
u_short isl_filler[2];
u_short isl_ports[2];
u_short isl_icmp;
} isl_ps;
} ipslog_t;
#define isl_sport isl_ps.isl_ports[0]
#define isl_dport isl_ps.isl_ports[1]
#define isl_itype isl_ps.isl_icmp
#define ISL_NEW 0
#define ISL_EXPIRE 0xffff
#define ISL_FLUSH 0xfffe
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;
u_long iss_logged;
u_long iss_logfail;
u_long iss_inuse;
ipstate_t **iss_table;
} ips_stat_t;
extern u_long fr_tcpidletimeout;
extern u_long fr_tcpclosewait;
extern u_long fr_tcplastack;
extern u_long fr_tcptimeout;
extern u_long fr_tcpclosed;
extern u_long fr_udptimeout;
extern u_long fr_icmptimeout;
extern int fr_stateinit __P((void));
extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
extern ipstate_t *fr_addstate __P((ip_t *, fr_info_t *, u_int));
extern frentry_t *fr_checkstate __P((ip_t *, fr_info_t *));
extern void ip_statesync __P((void *));
extern void fr_timeoutstate __P((void));
extern void fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
extern void fr_stateunload __P((void));
extern void ipstate_log __P((struct ipstate *, u_int));
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern int fr_state_ioctl __P((caddr_t, u_long, int));
#else
extern int fr_state_ioctl __P((caddr_t, int, int));
#endif
#endif /* __IP_STATE_H__ */
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