ip_state.h revision 57096 
1/*
2 * Copyright (C) 1995-1998 by Darren Reed.
3 *
4 * Redistribution and use in source and binary forms are permitted
5 * provided that this notice is preserved and due credit is given
6 * to the original author and the contributors.
7 *
8 * @(#)ip_state.h	1.3 1/12/96 (C) 1995 Darren Reed
9 * $Id: ip_state.h,v 2.1.2.2 2000/01/24 13:13:52 darrenr Exp $
10 */
11#ifndef	__IP_STATE_H__
12#define	__IP_STATE_H__
13
14#define	IPSTATE_SIZE	257
15#define	IPSTATE_MAX	2048	/* Maximum number of states held */
16
17#define	PAIRS(s1,d1,s2,d2)	((((s1) == (s2)) && ((d1) == (d2))) ||\
18				 (((s1) == (d2)) && ((d1) == (s2))))
19#define	IPPAIR(s1,d1,s2,d2)	PAIRS((s1).s_addr, (d1).s_addr, \
20				      (s2).s_addr, (d2).s_addr)
21
22
23typedef struct udpstate {
24	u_short	us_sport;
25	u_short	us_dport;
26} udpstate_t;
27
28typedef struct icmpstate {
29	u_short	ics_id;
30	u_short	ics_seq;
31	u_char	ics_type;
32} icmpstate_t;
33
34typedef	struct	tcpdata	{
35	u_32_t	td_end;
36	u_32_t	td_maxend;
37	u_short	td_maxwin;
38} tcpdata_t;
39
40typedef	struct tcpstate {
41	u_short	ts_sport;
42	u_short	ts_dport;
43	tcpdata_t ts_data[2];
44	u_char	ts_state[2];
45} tcpstate_t;
46
47typedef struct ipstate {
48	struct	ipstate	*is_next;
49	u_long	is_age;
50	u_int	is_pass;
51	U_QUAD_T	is_pkts;
52	U_QUAD_T	is_bytes;
53	void	*is_ifpin;
54	void	*is_ifpout;
55	frentry_t	*is_rule;
56	struct	in_addr	is_src;
57	struct	in_addr	is_dst;
58	u_char	is_p;			/* Protocol */
59	u_char	is_rout;		/* Is rule in/out ? */
60	u_32_t	is_flags;
61	u_32_t	is_opt;			/* packet options set */
62	u_32_t	is_optmsk;		/*    "      "    mask */
63	u_short	is_sec;			/* security options set */
64	u_short	is_secmsk;		/*    "        "    mask */
65	u_short	is_auth;		/* authentication options set */
66	u_short	is_authmsk;		/*    "              "    mask */
67	union {
68		icmpstate_t	is_ics;
69		tcpstate_t	is_ts;
70		udpstate_t	is_us;
71	} is_ps;
72} ipstate_t;
73
74#define	is_icmp	is_ps.is_ics
75#define	is_type	is_icmp.ics_type
76#define	is_code	is_icmp.ics_code
77#define	is_tcp	is_ps.is_ts
78#define	is_udp	is_ps.is_us
79#define is_send	is_tcp.ts_data[0].td_end
80#define is_dend	is_tcp.ts_data[1].td_end
81#define is_maxswin	is_tcp.ts_data[0].td_maxwin
82#define is_maxdwin	is_tcp.ts_data[1].td_maxwin
83#define is_maxsend	is_tcp.ts_data[0].td_maxend
84#define is_maxdend	is_tcp.ts_data[1].td_maxend
85#define	is_sport	is_tcp.ts_sport
86#define	is_dport	is_tcp.ts_dport
87#define	is_state	is_tcp.ts_state
88
89#define	TH_OPENING	(TH_SYN|TH_ACK)
90/*
91 * is_flags:
92 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
93 * whether it is short, tcp/udp, a fragment or the presence of IP options.
94 * Bits 4 - 7 are set from the initial packet and contain what the packet
95 * anded with bits 0-3 must match.
96 * Bits 8,9 are used to indicate wildcard source/destination port matching.
97 */
98
99
100typedef	struct	ipslog	{
101	U_QUAD_T	isl_pkts;
102	U_QUAD_T	isl_bytes;
103	struct	in_addr	isl_src;
104	struct	in_addr	isl_dst;
105	u_char	isl_p;
106	u_char	isl_flags;
107	u_char	isl_state[2];
108	u_short	isl_type;
109	union {
110		u_short	isl_filler[2];
111		u_short	isl_ports[2];
112		u_short	isl_icmp;
113	} isl_ps;
114} ipslog_t;
115
116#define	isl_sport	isl_ps.isl_ports[0]
117#define	isl_dport	isl_ps.isl_ports[1]
118#define	isl_itype	isl_ps.isl_icmp
119
120#define	ISL_NEW		0
121#define	ISL_EXPIRE	0xffff
122#define	ISL_FLUSH	0xfffe
123
124
125typedef	struct	ips_stat {
126	u_long	iss_hits;
127	u_long	iss_miss;
128	u_long	iss_max;
129	u_long	iss_tcp;
130	u_long	iss_udp;
131	u_long	iss_icmp;
132	u_long	iss_nomem;
133	u_long	iss_expire;
134	u_long	iss_fin;
135	u_long	iss_active;
136	u_long	iss_logged;
137	u_long	iss_logfail;
138	u_long	iss_inuse;
139	ipstate_t **iss_table;
140} ips_stat_t;
141
142
143extern	u_long	fr_tcpidletimeout;
144extern	u_long	fr_tcpclosewait;
145extern	u_long	fr_tcplastack;
146extern	u_long	fr_tcptimeout;
147extern	u_long	fr_tcpclosed;
148extern	u_long	fr_udptimeout;
149extern	u_long	fr_icmptimeout;
150extern	int	fr_stateinit __P((void));
151extern	int	fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
152extern	ipstate_t	*fr_addstate __P((ip_t *, fr_info_t *, u_int));
153extern	frentry_t	*fr_checkstate __P((ip_t *, fr_info_t *));
154extern	void	ip_statesync __P((void *));
155extern	void	fr_timeoutstate __P((void));
156extern	void	fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
157extern	void	fr_stateunload __P((void));
158extern	void	ipstate_log __P((struct ipstate *, u_int));
159#if defined(__NetBSD__) || defined(__OpenBSD__)
160extern	int	fr_state_ioctl __P((caddr_t, u_long, int));
161#else
162extern	int	fr_state_ioctl __P((caddr_t, int, int));
163#endif
164
165#endif /* __IP_STATE_H__ */
166