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 $
8 * $FreeBSD: src/sys/contrib/ipfilter/netinet/ip_state.h,v 1.10.2.5 2004/07/04 09:24:39 darrenr Exp $
9 * $DragonFly: src/sys/contrib/ipfilter/netinet/ip_state.h,v 1.4 2004/07/28 00:22:37 hmp Exp $
11 #ifndef __IP_STATE_H__
12 #define __IP_STATE_H__
14 #include <sys/ioccom.h>
16 #if defined(__STDC__) || defined(__GNUC__)
17 # define SIOCDELST _IOW('r', 61, struct ipstate *)
19 # define SIOCDELST _IOW(r, 61, struct ipstate *)
23 # define IPSTATE_SIZE 5737
26 # define IPSTATE_MAX 4013 /* Maximum number of states held */
29 #define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
30 (((s1) == (d2)) && ((d1) == (s2))))
31 #define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
32 (s2).s_addr, (d2).s_addr)
35 typedef struct udpstate {
40 typedef struct icmpstate {
46 typedef struct tcpdata {
53 typedef struct tcpstate {
60 typedef struct ipstate {
61 struct ipstate *is_next;
62 struct ipstate **is_pnext;
63 struct ipstate *is_hnext;
64 struct ipstate **is_phnext;
65 struct ipstate **is_me;
74 u_int is_frage[2]; /* age from filter rule, forward & reverse */
76 u_char is_p; /* Protocol */
77 u_char is_v; /* IP version */
78 u_char is_fsm; /* 1 = following FSM, 0 = not */
79 u_char is_xxx; /* pad */
80 u_int is_hv; /* hash value for this in the table */
81 u_32_t is_rulen; /* rule number */
82 u_32_t is_flags; /* flags for this structure */
83 u_32_t is_opt; /* packet options set */
84 u_32_t is_optmsk; /* " " mask */
85 u_short is_sec; /* security options set */
86 u_short is_secmsk; /* " " mask */
87 u_short is_auth; /* authentication options set */
88 u_short is_authmsk; /* " " mask */
95 char is_ifname[4][IFNAMSIZ];
96 #if SOLARIS || defined(__sgi)
101 #define is_saddr is_src.in4.s_addr
102 #define is_daddr is_dst.in4.s_addr
103 #define is_icmp is_ps.is_ics
104 #define is_type is_icmp.ics_type
105 #define is_code is_icmp.ics_code
106 #define is_tcp is_ps.is_ts
107 #define is_udp is_ps.is_us
108 #define is_send is_tcp.ts_data[0].td_end
109 #define is_dend is_tcp.ts_data[1].td_end
110 #define is_maxswin is_tcp.ts_data[0].td_maxwin
111 #define is_maxdwin is_tcp.ts_data[1].td_maxwin
112 #define is_swscale is_tcp.ts_data[0].td_wscale
113 #define is_dwscale is_tcp.ts_data[1].td_wscale
114 #define is_maxsend is_tcp.ts_data[0].td_maxend
115 #define is_maxdend is_tcp.ts_data[1].td_maxend
116 #define is_sport is_tcp.ts_sport
117 #define is_dport is_tcp.ts_dport
118 #define is_state is_tcp.ts_state
119 #define is_ifpin is_ifp[0]
120 #define is_ifpout is_ifp[2]
122 #define TH_OPENING (TH_SYN|TH_ACK)
125 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
126 * whether it is short, tcp/udp, a fragment or the presence of IP options.
127 * Bits 4 - 7 are set from the initial packet and contain what the packet
128 * anded with bits 0-3 must match.
129 * Bits 8,9 are used to indicate wildcard source/destination port matching.
132 typedef struct ipstate_save {
134 struct ipstate ips_is;
135 struct frentry ips_fr;
138 #define ips_rule ips_is.is_rule
141 typedef struct ipslog {
144 union i6addr isl_src;
145 union i6addr isl_dst;
148 u_short isl_filler[2];
149 u_short isl_ports[2];
160 #define isl_sport isl_ps.isl_ports[0]
161 #define isl_dport isl_ps.isl_ports[1]
162 #define isl_itype isl_ps.isl_icmp
165 #define ISL_EXPIRE 0xffff
166 #define ISL_FLUSH 0xfffe
167 #define ISL_REMOVE 0xfffd
170 typedef struct ips_stat {
184 ipstate_t **iss_table;
189 extern u_long fr_tcpidletimeout;
190 extern u_long fr_tcpclosewait;
191 extern u_long fr_tcplastack;
192 extern u_long fr_tcptimeout;
193 extern u_long fr_tcpclosed;
194 extern u_long fr_tcphalfclosed;
195 extern u_long fr_udptimeout;
196 extern u_long fr_udpacktimeout;
197 extern u_long fr_icmptimeout;
198 extern u_long fr_icmpacktimeout;
199 extern ipstate_t *ips_list;
200 extern int fr_state_lock;
201 extern int fr_stateinit (void);
202 extern int fr_tcpstate (ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *);
203 extern ipstate_t *fr_addstate (ip_t *, fr_info_t *, ipstate_t **, u_int);
204 extern frentry_t *fr_checkstate (ip_t *, fr_info_t *);
205 extern void ip_statesync (void *);
206 extern void fr_timeoutstate (void);
207 extern int fr_tcp_age (u_long *, u_char *, fr_info_t *, int, int);
208 extern void fr_stateunload (void);
209 extern void ipstate_log (struct ipstate *, u_int);
210 #if defined(__NetBSD__) || defined(__OpenBSD__)
211 extern int fr_state_ioctl (caddr_t, u_long, int);
213 extern int fr_state_ioctl (caddr_t, int, int);
216 #endif /* __IP_STATE_H__ */