4 * Copyright (C) 1995-2001 by Darren Reed.
6 * See the IPFILTER.LICENCE file for details on licencing.
8 * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
10 * Id: ip_state.h,v 2.68.2.3 2005/03/03 14:24:11 darrenr Exp
12 #ifndef __IP_STATE_H__
13 #define __IP_STATE_H__
15 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51)
16 # define SIOCDELST _IOW('r', 61, struct ipfobj)
18 # define SIOCDELST _IOW(r, 61, struct ipfobj)
24 # define IPSTATE_SIZE 5737
27 # define IPSTATE_MAX 4013 /* Maximum number of states held */
30 #define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
31 (((s1) == (d2)) && ((d1) == (s2))))
32 #define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
33 (s2).s_addr, (d2).s_addr)
36 typedef struct ipstate {
38 struct ipstate *is_next;
39 struct ipstate **is_pnext;
40 struct ipstate *is_hnext;
41 struct ipstate **is_phnext;
42 struct ipstate **is_me;
46 struct ipftq *is_tqehead[2];
47 struct ipscan *is_isc;
50 U_QUAD_T is_icmppkts[4];
51 struct ipftqent is_sti;
53 int is_ref; /* reference count */
59 u_char is_p; /* Protocol */
63 u_32_t is_opt[2]; /* packet options set */
64 u_32_t is_optmsk[2]; /* " " mask */
65 u_short is_sec; /* security options set */
66 u_short is_secmsk; /* " " mask */
67 u_short is_auth; /* authentication options set */
68 u_short is_authmsk; /* " " mask */
77 u_32_t is_rulen; /* rule number when created */
80 char is_group[FR_GROUPLEN];
82 char is_ifname[4][LIFNAMSIZ];
85 #define is_die is_sti.tqe_die
86 #define is_state is_sti.tqe_state
87 #define is_touched is_sti.tqe_touched
88 #define is_saddr is_src.in4.s_addr
89 #define is_daddr is_dst.in4.s_addr
90 #define is_icmp is_ps.is_ics
91 #define is_type is_icmp.ici_type
92 #define is_code is_icmp.ici_code
93 #define is_tcp is_ps.is_ts
94 #define is_udp is_ps.is_us
95 #define is_send is_tcp.ts_data[0].td_end
96 #define is_dend is_tcp.ts_data[1].td_end
97 #define is_maxswin is_tcp.ts_data[0].td_maxwin
98 #define is_maxdwin is_tcp.ts_data[1].td_maxwin
99 #define is_maxsend is_tcp.ts_data[0].td_maxend
100 #define is_maxdend is_tcp.ts_data[1].td_maxend
101 #define is_swinscale is_tcp.ts_data[0].td_winscale
102 #define is_dwinscale is_tcp.ts_data[1].td_winscale
103 #define is_swinflags is_tcp.ts_data[0].td_winflags
104 #define is_dwinflags is_tcp.ts_data[1].td_winflags
105 #define is_sport is_tcp.ts_sport
106 #define is_dport is_tcp.ts_dport
107 #define is_ifpin is_ifp[0]
108 #define is_ifpout is_ifp[2]
109 #define is_gre is_ps.is_ug
110 #define is_call is_gre.gs_call
112 #define IS_WSPORT SI_W_SPORT /* 0x00100 */
113 #define IS_WDPORT SI_W_DPORT /* 0x00200 */
114 #define IS_WSADDR SI_W_SADDR /* 0x00400 */
115 #define IS_WDADDR SI_W_DADDR /* 0x00800 */
116 #define IS_NEWFR SI_NEWFR /* 0x01000 */
117 #define IS_CLONE SI_CLONE /* 0x02000 */
118 #define IS_CLONED SI_CLONED /* 0x04000 */
119 #define IS_TCPFSM 0x10000
120 #define IS_STRICT 0x20000
121 #define IS_ISNSYN 0x40000
122 #define IS_ISNACK 0x80000
123 #define IS_STATESYNC 0x100000
125 * IS_SC flags are for scan-operations that need to be recognised in state.
127 #define IS_SC_CLIENT 0x10000000
128 #define IS_SC_SERVER 0x20000000
129 #define IS_SC_MATCHC 0x40000000
130 #define IS_SC_MATCHS 0x80000000
131 #define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC)
132 #define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER)
135 * Flags that can be passed into fr_addstate
137 #define IS_INHERITED 0x0fffff00
139 #define TH_OPENING (TH_SYN|TH_ACK)
142 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
143 * whether it is short, tcp/udp, a fragment or the presence of IP options.
144 * Bits 4 - 7 are set from the initial packet and contain what the packet
145 * anded with bits 0-3 must match.
146 * Bits 8,9 are used to indicate wildcard source/destination port matching.
147 * Bits 10,11 are reserved for other wildcard flag compatibility.
148 * Bits 12,13 are for scaning.
151 typedef struct ipstate_save {
153 struct ipstate ips_is;
154 struct frentry ips_fr;
157 #define ips_rule ips_is.is_rule
160 typedef struct ipslog {
161 U_QUAD_T isl_pkts[4];
162 U_QUAD_T isl_bytes[4];
168 u_short isl_filler[2];
169 u_short isl_ports[2];
177 char isl_group[FR_GROUPLEN];
180 #define isl_sport isl_ps.isl_ports[0]
181 #define isl_dport isl_ps.isl_ports[1]
182 #define isl_itype isl_ps.isl_icmp
186 #define ISL_EXPIRE 0xffff
187 #define ISL_FLUSH 0xfffe
188 #define ISL_REMOVE 0xfffd
189 #define ISL_INTERMEDIATE 0xfffc
190 #define ISL_KILLED 0xfffb
191 #define ISL_ORPHAN 0xfffa
192 #define ISL_UNLOAD 0xfff9
195 typedef struct ips_stat {
213 u_long iss_bucketfull;
216 ipstate_t **iss_table;
218 u_long *iss_bucketlen;
223 extern u_long fr_tcpidletimeout;
224 extern u_long fr_tcpclosewait;
225 extern u_long fr_tcplastack;
226 extern u_long fr_tcptimeout;
227 extern u_long fr_tcpclosed;
228 extern u_long fr_tcphalfclosed;
229 extern u_long fr_udptimeout;
230 extern u_long fr_udpacktimeout;
231 extern u_long fr_icmptimeout;
232 extern u_long fr_icmpacktimeout;
233 extern u_long fr_iptimeout;
234 extern int fr_statemax;
235 extern int fr_statesize;
236 extern int fr_state_lock;
237 extern int fr_state_maxbucket;
238 extern int fr_state_maxbucket_reset;
239 extern ipstate_t *ips_list;
240 extern ipftq_t *ips_utqe;
241 extern ipftq_t ips_tqtqb[IPF_TCP_NSTATES];
243 extern int fr_stateinit __P((void));
244 extern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int));
245 extern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *));
246 extern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **));
247 extern void fr_statesync __P((void *));
248 extern void fr_timeoutstate __P((void));
249 extern int fr_tcp_age __P((struct ipftqent *, struct fr_info *,
250 struct ipftq *, int));
251 extern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *,
252 struct tcpdata *, tcphdr_t *, int));
253 extern void fr_stateunload __P((void));
254 extern void ipstate_log __P((struct ipstate *, u_int));
255 extern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *));
256 extern void fr_stinsert __P((struct ipstate *, int));
257 extern void fr_sttab_init __P((struct ipftq *));
258 extern void fr_sttab_destroy __P((struct ipftq *));
259 extern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *));
260 extern void fr_statederef __P((ipstate_t **));
261 extern void fr_setstatequeue __P((ipstate_t *, int));
263 #endif /* __IP_STATE_H__ */