1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* $OpenBSD: ip_state.h,v 1.10 1999/12/15 05:20:23 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
* $Id: ip_state.h,v 1.10 1999/12/15 05:20:23 kjell Exp $
*/
#ifndef __IP_STATE_H__
#define __IP_STATE_H__
#define IPSTATE_SIZE 257
#define IPSTATE_MAX 2048 /* Maximum number of states held */
#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_char is_rout; /* Is rule in/out ? */
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;
} 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 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__ */
|
