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 2.13.2.13 2002/06/27 14:40:29 darrenr Exp $
10 #define __IP_STATE_H__
12 #if defined(__STDC__) || defined(__GNUC__)
13 # define SIOCDELST _IOW('r', 61, struct ipstate *)
15 # define SIOCDELST _IOW(r, 61, struct ipstate *)
19 # define IPSTATE_SIZE 5737
22 # define IPSTATE_MAX 4013 /* Maximum number of states held */
25 #define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
26 (((s1) == (d2)) && ((d1) == (s2))))
27 #define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
28 (s2).s_addr, (d2).s_addr)
31 typedef struct udpstate {
36 typedef struct icmpstate {
42 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;
61 struct ipstate **is_me;
69 u_int is_frage[2]; /* age from filter rule, forward & reverse */
71 u_char is_p; /* Protocol */
72 u_char is_v; /* IP version */
73 u_char is_fsm; /* 1 = following FSM, 0 = not */
74 u_char is_xxx; /* pad */
75 u_int is_hv; /* hash value for this in the table */
76 u_32_t is_rulen; /* rule number */
77 u_32_t is_flags; /* flags for this structure */
78 u_32_t is_opt; /* packet options set */
79 u_32_t is_optmsk; /* " " mask */
80 u_short is_sec; /* security options set */
81 u_short is_secmsk; /* " " mask */
82 u_short is_auth; /* authentication options set */
83 u_short is_authmsk; /* " " mask */
90 char is_ifname[4][IFNAMSIZ];
91 #if SOLARIS || defined(__sgi)
96 #define is_saddr is_src.in4.s_addr
97 #define is_daddr is_dst.in4.s_addr
98 #define is_icmp is_ps.is_ics
99 #define is_type is_icmp.ics_type
100 #define is_code is_icmp.ics_code
101 #define is_tcp is_ps.is_ts
102 #define is_udp is_ps.is_us
103 #define is_send is_tcp.ts_data[0].td_end
104 #define is_dend is_tcp.ts_data[1].td_end
105 #define is_maxswin is_tcp.ts_data[0].td_maxwin
106 #define is_maxdwin is_tcp.ts_data[1].td_maxwin
107 #define is_swscale is_tcp.ts_data[0].td_wscale
108 #define is_dwscale is_tcp.ts_data[1].td_wscale
109 #define is_maxsend is_tcp.ts_data[0].td_maxend
110 #define is_maxdend is_tcp.ts_data[1].td_maxend
111 #define is_sport is_tcp.ts_sport
112 #define is_dport is_tcp.ts_dport
113 #define is_state is_tcp.ts_state
114 #define is_ifpin is_ifp[0]
115 #define is_ifpout is_ifp[2]
117 #define TH_OPENING (TH_SYN|TH_ACK)
120 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
121 * whether it is short, tcp/udp, a fragment or the presence of IP options.
122 * Bits 4 - 7 are set from the initial packet and contain what the packet
123 * anded with bits 0-3 must match.
124 * Bits 8,9 are used to indicate wildcard source/destination port matching.
127 typedef struct ipstate_save {
129 struct ipstate ips_is;
130 struct frentry ips_fr;
133 #define ips_rule ips_is.is_rule
136 typedef struct ipslog {
139 union i6addr isl_src;
140 union i6addr isl_dst;
143 u_short isl_filler[2];
144 u_short isl_ports[2];
155 #define isl_sport isl_ps.isl_ports[0]
156 #define isl_dport isl_ps.isl_ports[1]
157 #define isl_itype isl_ps.isl_icmp
160 #define ISL_EXPIRE 0xffff
161 #define ISL_FLUSH 0xfffe
162 #define ISL_REMOVE 0xfffd
165 typedef struct ips_stat {
179 ipstate_t **iss_table;
184 extern u_long fr_tcpidletimeout;
185 extern u_long fr_tcpclosewait;
186 extern u_long fr_tcplastack;
187 extern u_long fr_tcptimeout;
188 extern u_long fr_tcpclosed;
189 extern u_long fr_tcphalfclosed;
190 extern u_long fr_udptimeout;
191 extern u_long fr_udpacktimeout;
192 extern u_long fr_icmptimeout;
193 extern u_long fr_icmpacktimeout;
194 extern ipstate_t *ips_list;
195 extern int fr_state_lock;
196 extern int fr_stateinit __P((void));
197 extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
198 extern ipstate_t *fr_addstate __P((ip_t *, fr_info_t *, ipstate_t **, u_int));
199 extern frentry_t *fr_checkstate __P((ip_t *, fr_info_t *));
200 extern void ip_statesync __P((void *));
201 extern void fr_timeoutstate __P((void));
202 extern int fr_tcp_age __P((u_long *, u_char *, fr_info_t *, int, int));
203 extern void fr_stateunload __P((void));
204 extern void ipstate_log __P((struct ipstate *, u_int));
205 #if defined(__NetBSD__) || defined(__OpenBSD__)
206 extern int fr_state_ioctl __P((caddr_t, u_long, int));
208 extern int fr_state_ioctl __P((caddr_t, int, int));
211 #endif /* __IP_STATE_H__ */