166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
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* Copyright (C) 1995-1998 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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* $Id: ip_state.h,v 2.1 1999/08/04 17:30:00 darrenr Exp $
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* $FreeBSD$
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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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#define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
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(((s1) == (d2)) && ((d1) == (s2))))
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#define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
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(s2).s_addr, (d2).s_addr)
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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 tcpdata {
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u_32_t td_end;
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u_32_t td_maxend;
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u_short td_maxwin;
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} tcpdata_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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tcpdata_t ts_data[2];
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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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u_long is_age;
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u_int is_pass;
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U_QUAD_T is_pkts;
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U_QUAD_T is_bytes;
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void *is_ifpin;
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void *is_ifpout;
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frentry_t *is_rule;
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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; /* Protocol */
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u_char is_rout; /* Is rule in/out ? */
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u_32_t is_flags;
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u_32_t is_opt; /* packet options set */
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u_32_t is_optmsk; /* " " mask */
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u_short is_sec; /* security options set */
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u_short is_secmsk; /* " " mask */
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u_short is_auth; /* authentication options set */
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u_short is_authmsk; /* " " mask */
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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_type is_icmp.ics_type
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#define is_code is_icmp.ics_code
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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_send is_tcp.ts_data[0].td_end
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#define is_dend is_tcp.ts_data[1].td_end
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#define is_maxswin is_tcp.ts_data[0].td_maxwin
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#define is_maxdwin is_tcp.ts_data[1].td_maxwin
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#define is_maxsend is_tcp.ts_data[0].td_maxend
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#define is_maxdend is_tcp.ts_data[1].td_maxend
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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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/*
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* is_flags:
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* Bits 0 - 3 are use as a mask with the current packet's bits to check for
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* whether it is short, tcp/udp, a fragment or the presence of IP options.
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* Bits 4 - 7 are set from the initial packet and contain what the packet
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* anded with bits 0-3 must match.
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* Bits 8,9 are used to indicate wildcard source/destination port matching.
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*/
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typedef struct ipslog {
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U_QUAD_T isl_pkts;
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U_QUAD_T isl_bytes;
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struct in_addr isl_src;
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struct in_addr isl_dst;
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u_char isl_p;
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u_char isl_flags;
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u_char isl_state[2];
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u_short isl_type;
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union {
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u_short isl_filler[2];
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u_short isl_ports[2];
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u_short isl_icmp;
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} isl_ps;
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} ipslog_t;
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#define isl_sport isl_ps.isl_ports[0]
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#define isl_dport isl_ps.isl_ports[1]
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#define isl_itype isl_ps.isl_icmp
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#define ISL_NEW 0
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#define ISL_EXPIRE 0xffff
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#define ISL_FLUSH 0xfffe
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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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u_long iss_logged;
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u_long iss_logfail;
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u_long iss_inuse;
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ipstate_t **iss_table;
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} ips_stat_t;
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extern u_long fr_tcpidletimeout;
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extern u_long fr_tcpclosewait;
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extern u_long fr_tcplastack;
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extern u_long fr_tcptimeout;
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extern u_long fr_tcpclosed;
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extern u_long fr_udptimeout;
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extern u_long fr_icmptimeout;
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extern int fr_stateinit __P((void));
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extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
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extern ipstate_t *fr_addstate __P((ip_t *, fr_info_t *, u_int));
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extern frentry_t *fr_checkstate __P((ip_t *, fr_info_t *));
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extern void fr_timeoutstate __P((void));
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extern void fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
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extern void fr_stateunload __P((void));
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extern void ipstate_log __P((struct ipstate *, u_int));
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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extern int fr_state_ioctl __P((caddr_t, u_long, int));
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#else
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extern int fr_state_ioctl __P((caddr_t, int, int));
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#endif
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#endif /* __IP_STATE_H__ */
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