1 /* $NetBSD: ip_state.h,v 1.24.2.1 2004/08/13 03:56:09 jmc Exp $ */
2
3 /*
4 * Copyright (C) 1995-2001 by Darren Reed.
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
9 * Id: ip_state.h,v 2.68.2.1 2004/06/30 11:26:12 darrenr Exp
10 */
11 #ifndef _NETINET_IP_STATE_H_
12 #define _NETINET_IP_STATE_H_
13
14 #if defined(__STDC__) || defined(__GNUC__)
15 # define SIOCDELST _IOW('r', 61, struct ipfobj)
16 #else
17 # define SIOCDELST _IOW(r, 61, struct ipfobj)
18 #endif
19
20 struct ipscan;
21
22 #ifndef IPSTATE_SIZE
23 # define IPSTATE_SIZE 5737
24 #endif
25 #ifndef IPSTATE_MAX
26 # define IPSTATE_MAX 4013 /* Maximum number of states held */
27 #endif
28
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)
33
34
35 typedef struct ipstate {
36 ipfmutex_t is_lock;
37 struct ipstate *is_next;
38 struct ipstate **is_pnext;
39 struct ipstate *is_hnext;
40 struct ipstate **is_phnext;
41 struct ipstate **is_me;
42 void *is_ifp[4];
43 void *is_sync;
44 struct nat *is_nat[2];
45 frentry_t *is_rule;
46 struct ipftq *is_tqehead[2];
47 struct ipscan *is_isc;
48 U_QUAD_T is_pkts[4];
49 U_QUAD_T is_bytes[4];
50 U_QUAD_T is_icmppkts[4];
51 struct ipftqent is_sti;
52 u_int is_frage[2];
53 int is_ref; /* reference count */
54 int is_isninc[2];
55 u_short is_sumd[2];
56 i6addr_t is_src;
57 i6addr_t is_dst;
58 u_int is_pass;
59 u_char is_p; /* Protocol */
60 u_char is_v;
61 u_32_t is_hv;
62 u_32_t is_tag;
63 u_32_t is_opt; /* packet options set */
64 u_32_t is_optmsk; /* " " 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 */
69 union {
70 icmpinfo_t is_ics;
71 tcpinfo_t is_ts;
72 udpinfo_t is_us;
73 greinfo_t is_ug;
74 } is_ps;
75 u_32_t is_flags;
76 int is_flx[2][2];
77 u_32_t is_rulen; /* rule number when created */
78 u_32_t is_s0[2];
79 u_short is_smsk[2];
80 char is_group[FR_GROUPLEN];
81 char is_sbuf[2][16];
82 char is_ifname[4][LIFNAMSIZ];
83 } ipstate_t;
84
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
111 #define IS_WSPORT SI_W_SPORT /* 0x00100 */
112 #define IS_WDPORT SI_W_DPORT /* 0x00200 */
113 #define IS_WSADDR SI_W_SADDR /* 0x00400 */
114 #define IS_WDADDR SI_W_DADDR /* 0x00800 */
115 #define IS_NEWFR SI_NEWFR /* 0x01000 */
116 #define IS_CLONE SI_CLONE /* 0x02000 */
117 #define IS_CLONED SI_CLONED /* 0x04000 */
118 #define IS_TCPFSM 0x10000
119 #define IS_STRICT 0x20000
120 #define IS_ISNSYN 0x40000
121 #define IS_ISNACK 0x80000
122 /*
123 * IS_SC flags are for scan-operations that need to be recognised in state.
124 */
125 #define IS_SC_CLIENT 0x10000000
126 #define IS_SC_SERVER 0x20000000
127 #define IS_SC_MATCHC 0x40000000
128 #define IS_SC_MATCHS 0x80000000
129 #define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC)
130 #define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER)
131
132 /*
133 * Flags that can be passed into fr_addstate
134 */
135 #define IS_INHERITED 0x0fffff00
136
137 #define TH_OPENING (TH_SYN|TH_ACK)
138 /*
139 * is_flags:
140 * Bits 0 - 3 are use as a mask with the current packet's bits to check for
141 * whether it is short, tcp/udp, a fragment or the presence of IP options.
142 * Bits 4 - 7 are set from the initial packet and contain what the packet
143 * anded with bits 0-3 must match.
144 * Bits 8,9 are used to indicate wildcard source/destination port matching.
145 * Bits 10,11 are reserved for other wildcard flag compatibility.
146 * Bits 12,13 are for scaning.
147 */
148
149 typedef struct ipstate_save {
150 void *ips_next;
151 struct ipstate ips_is;
152 struct frentry ips_fr;
153 } ipstate_save_t;
154
155 #define ips_rule ips_is.is_rule
156
157
158 typedef struct ipslog {
159 U_QUAD_T isl_pkts[4];
160 U_QUAD_T isl_bytes[4];
161 i6addr_t isl_src;
162 i6addr_t isl_dst;
163 u_32_t isl_tag;
164 u_short isl_type;
165 union {
166 u_short isl_filler[2];
167 u_short isl_ports[2];
168 u_short isl_icmp;
169 } isl_ps;
170 u_char isl_v;
171 u_char isl_p;
172 u_char isl_flags;
173 u_char isl_state[2];
174 u_32_t isl_rulen;
175 char isl_group[FR_GROUPLEN];
176 } ipslog_t;
177
178 #define isl_sport isl_ps.isl_ports[0]
179 #define isl_dport isl_ps.isl_ports[1]
180 #define isl_itype isl_ps.isl_icmp
181
182 #define ISL_NEW 0
183 #define ISL_CLONE 1
184 #define ISL_EXPIRE 0xffff
185 #define ISL_FLUSH 0xfffe
186 #define ISL_REMOVE 0xfffd
187 #define ISL_INTERMEDIATE 0xfffc
188 #define ISL_KILLED 0xfffb
189 #define ISL_ORPHAN 0xfffa
190
191
192 typedef struct ips_stat {
193 u_long iss_hits;
194 u_long iss_miss;
195 u_long iss_max;
196 u_long iss_maxref;
197 u_long iss_tcp;
198 u_long iss_udp;
199 u_long iss_icmp;
200 u_long iss_nomem;
201 u_long iss_expire;
202 u_long iss_fin;
203 u_long iss_active;
204 u_long iss_logged;
205 u_long iss_logfail;
206 u_long iss_inuse;
207 u_long iss_wild;
208 u_long iss_killed;
209 u_long iss_ticks;
210 u_long iss_bucketfull;
211 int iss_statesize;
212 int iss_statemax;
213 ipstate_t **iss_table;
214 ipstate_t *iss_list;
215 u_long *iss_bucketlen;
216 } ips_stat_t;
217
218
219 extern u_long fr_tcpidletimeout;
220 extern u_long fr_tcpclosewait;
221 extern u_long fr_tcplastack;
222 extern u_long fr_tcptimeout;
223 extern u_long fr_tcpclosed;
224 extern u_long fr_tcphalfclosed;
225 extern u_long fr_udptimeout;
226 extern u_long fr_udpacktimeout;
227 extern u_long fr_icmptimeout;
228 extern u_long fr_icmpacktimeout;
229 extern int fr_statemax;
230 extern int fr_statesize;
231 extern int fr_state_lock;
232 extern int fr_state_maxbucket;
233 extern int fr_state_maxbucket_reset;
234 extern ipstate_t *ips_list;
235 extern ipftq_t *ips_utqe;
236 extern ipftq_t ips_tqtqb[IPF_TCP_NSTATES];
237
238 extern int fr_stateinit __P((void));
239 extern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int));
240 extern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *));
241 extern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **));
242 extern void fr_statesync __P((void *));
243 extern void fr_timeoutstate __P((void));
244 extern int fr_tcp_age __P((struct ipftqent *, struct fr_info *,
245 struct ipftq *, int));
246 extern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *,
247 struct tcpdata *, tcphdr_t *, int));
248 extern void fr_stateunload __P((void));
249 extern void ipstate_log __P((struct ipstate *, u_int));
250 extern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int));
251 extern void fr_stinsert __P((struct ipstate *, int));
252 extern void fr_sttab_init __P((struct ipftq *));
253 extern void fr_sttab_destroy __P((struct ipftq *));
254 extern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *));
255 extern void fr_statederef __P((fr_info_t *, ipstate_t **));
256 extern void fr_setstatequeue __P((ipstate_t *, int));
257
258 #endif /* _NETINET_IP_STATE_H_ */
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