2 * Copyright (C) 1995-2001 by Darren Reed.
4 * See the IPFILTER.LICENCE file for details on licencing.
6 * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
7 * $Id: ip_state.h,v 2.13.2.1 2000/07/08 02:15:35 darrenr Exp $
10 #ifndef __IP_STATE_H__
11 #define __IP_STATE_H__
13 #if defined(__STDC__) || defined(__GNUC__)
14 # define SIOCDELST _IOW('r', 61, struct ipstate *)
16 # define SIOCDELST _IOW(r, 61, struct ipstate *)
20 # define IPSTATE_SIZE 5737
23 # define IPSTATE_MAX 4013 /* Maximum number of states held */
26 #define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
27 (((s1) == (d2)) && ((d1) == (s2))))
28 #define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
29 (s2).s_addr, (d2).s_addr)
32 typedef struct udpstate {
37 typedef struct icmpstate {
43 typedef struct tcpdata {
49 typedef struct tcpstate {
56 typedef struct ipstate {
57 struct ipstate *is_next;
58 struct ipstate **is_pnext;
59 struct ipstate *is_hnext;
60 struct ipstate **is_phnext;
69 u_char is_p; /* Protocol */
73 u_32_t is_opt; /* packet options set */
74 u_32_t is_optmsk; /* " " mask */
75 u_short is_sec; /* security options set */
76 u_short is_secmsk; /* " " mask */
77 u_short is_auth; /* authentication options set */
78 u_short is_authmsk; /* " " mask */
84 char is_ifname[2][IFNAMSIZ];
85 #if SOLARIS || defined(__sgi)
90 #define is_saddr is_src.in4.s_addr
91 #define is_daddr is_dst.in4.s_addr
92 #define is_icmp is_ps.is_ics
93 #define is_type is_icmp.ics_type
94 #define is_code is_icmp.ics_code
95 #define is_tcp is_ps.is_ts
96 #define is_udp is_ps.is_us
97 #define is_send is_tcp.ts_data[0].td_end
98 #define is_dend is_tcp.ts_data[1].td_end
99 #define is_maxswin is_tcp.ts_data[0].td_maxwin
100 #define is_maxdwin is_tcp.ts_data[1].td_maxwin
101 #define is_maxsend is_tcp.ts_data[0].td_maxend
102 #define is_maxdend is_tcp.ts_data[1].td_maxend
103 #define is_sport is_tcp.ts_sport
104 #define is_dport is_tcp.ts_dport
105 #define is_state is_tcp.ts_state
106 #define is_ifpin is_ifp[0]
107 #define is_ifpout is_ifp[1]
109 #define TH_OPENING (TH_SYN|TH_ACK)
112 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
113 * whether it is short, tcp/udp, a fragment or the presence of IP options.
114 * Bits 4 - 7 are set from the initial packet and contain what the packet
115 * anded with bits 0-3 must match.
116 * Bits 8,9 are used to indicate wildcard source/destination port matching.
119 typedef struct ipstate_save {
121 struct ipstate ips_is;
122 struct frentry ips_fr;
125 #define ips_rule ips_is.is_rule
128 typedef struct ipslog {
131 union i6addr isl_src;
132 union i6addr isl_dst;
135 u_short isl_filler[2];
136 u_short isl_ports[2];
145 #define isl_sport isl_ps.isl_ports[0]
146 #define isl_dport isl_ps.isl_ports[1]
147 #define isl_itype isl_ps.isl_icmp
150 #define ISL_EXPIRE 0xffff
151 #define ISL_FLUSH 0xfffe
152 #define ISL_REMOVE 0xfffd
155 typedef struct ips_stat {
169 ipstate_t **iss_table;
174 extern u_long fr_tcpidletimeout;
175 extern u_long fr_tcpclosewait;
176 extern u_long fr_tcplastack;
177 extern u_long fr_tcptimeout;
178 extern u_long fr_tcpclosed;
179 extern u_long fr_tcphalfclosed;
180 extern u_long fr_udptimeout;
181 extern u_long fr_icmptimeout;
182 extern int fr_state_lock;
183 extern int fr_stateinit __P((void));
184 extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
185 extern ipstate_t *fr_addstate __P((ip_t *, fr_info_t *, u_int));
186 extern frentry_t *fr_checkstate __P((ip_t *, fr_info_t *));
187 extern void ip_statesync __P((void *));
188 extern void fr_timeoutstate __P((void));
189 extern void fr_tcp_age __P((u_long *, u_char *, fr_info_t *, int));
190 extern void fr_stateunload __P((void));
191 extern void ipstate_log __P((struct ipstate *, u_int));
192 #if defined(__NetBSD__) || defined(__OpenBSD__)
193 extern int fr_state_ioctl __P((caddr_t, u_long, int));
195 extern int fr_state_ioctl __P((caddr_t, int, int));
198 #endif /* __IP_STATE_H__ */