| 1 | /* $NetBSD: ip_state.h,v 1.3 2012/07/22 14:27:51 darrenr Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (C) 2012 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 1.1.1.2 2012/07/22 13:45:37 darrenr Exp |
| 10 | */ |
| 11 | #ifndef _NETINET_IP_STATE_H_ |
| 12 | #define _NETINET_IP_STATE_H_ |
| 13 | |
| 14 | #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) |
| 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 | frentry_t *is_rule; |
| 45 | struct ipftq *is_tqehead[2]; |
| 46 | struct ipscan *is_isc; |
| 47 | U_QUAD_T is_pkts[4]; |
| 48 | U_QUAD_T is_bytes[4]; |
| 49 | U_QUAD_T is_icmppkts[4]; |
| 50 | struct ipftqent is_sti; |
| 51 | u_int is_frage[2]; |
| 52 | int is_ref; /* reference count */ |
| 53 | int is_isninc[2]; |
| 54 | u_short is_sumd[2]; |
| 55 | i6addr_t is_src; |
| 56 | i6addr_t is_dst; |
| 57 | u_int is_pass; |
| 58 | u_char is_p; /* Protocol */ |
| 59 | u_char is_v; |
| 60 | int is_family; |
| 61 | u_32_t is_hv; |
| 62 | u_32_t is_tag; |
| 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 */ |
| 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 | frdest_t is_dif; |
| 81 | frdest_t is_tifs[2]; |
| 82 | char is_group[FR_GROUPLEN]; |
| 83 | char is_sbuf[2][16]; |
| 84 | char is_ifname[4][LIFNAMSIZ]; |
| 85 | } ipstate_t; |
| 86 | |
| 87 | #define is_die is_sti.tqe_die |
| 88 | #define is_state is_sti.tqe_state |
| 89 | #define is_touched is_sti.tqe_touched |
| 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.ici_type |
| 94 | #define is_tcp is_ps.is_ts |
| 95 | #define is_udp is_ps.is_us |
| 96 | #define is_send is_tcp.ts_data[0].td_end |
| 97 | #define is_dend is_tcp.ts_data[1].td_end |
| 98 | #define is_maxswin is_tcp.ts_data[0].td_maxwin |
| 99 | #define is_maxdwin is_tcp.ts_data[1].td_maxwin |
| 100 | #define is_maxsend is_tcp.ts_data[0].td_maxend |
| 101 | #define is_maxdend is_tcp.ts_data[1].td_maxend |
| 102 | #define is_swinscale is_tcp.ts_data[0].td_winscale |
| 103 | #define is_dwinscale is_tcp.ts_data[1].td_winscale |
| 104 | #define is_swinflags is_tcp.ts_data[0].td_winflags |
| 105 | #define is_dwinflags is_tcp.ts_data[1].td_winflags |
| 106 | #define is_sport is_tcp.ts_sport |
| 107 | #define is_dport is_tcp.ts_dport |
| 108 | #define is_ifpin is_ifp[0] |
| 109 | #define is_ifpout is_ifp[2] |
| 110 | #define is_gre is_ps.is_ug |
| 111 | #define is_call is_gre.gs_call |
| 112 | |
| 113 | #define IS_WSPORT SI_W_SPORT /* 0x00100 */ |
| 114 | #define IS_WDPORT SI_W_DPORT /* 0x00200 */ |
| 115 | #define IS_WSADDR SI_W_SADDR /* 0x00400 */ |
| 116 | #define IS_WDADDR SI_W_DADDR /* 0x00800 */ |
| 117 | #define IS_NEWFR SI_NEWFR /* 0x01000 */ |
| 118 | #define IS_CLONE SI_CLONE /* 0x02000 */ |
| 119 | #define IS_CLONED SI_CLONED /* 0x04000 */ |
| 120 | #define IS_TCPFSM 0x10000 |
| 121 | #define IS_STRICT 0x20000 |
| 122 | #define IS_ISNSYN 0x40000 |
| 123 | #define IS_ISNACK 0x80000 |
| 124 | #define IS_STATESYNC 0x100000 |
| 125 | #define IS_LOOSE 0x200000 |
| 126 | /* |
| 127 | * IS_SC flags are for scan-operations that need to be recognised in state. |
| 128 | */ |
| 129 | #define IS_SC_CLIENT 0x10000000 |
| 130 | #define IS_SC_SERVER 0x20000000 |
| 131 | #define IS_SC_MATCHC 0x40000000 |
| 132 | #define IS_SC_MATCHS 0x80000000 |
| 133 | #define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC) |
| 134 | #define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER) |
| 135 | |
| 136 | /* |
| 137 | * Flags that can be passed into ipf_addstate |
| 138 | */ |
| 139 | #define IS_INHERITED 0x0fffff00 |
| 140 | |
| 141 | #define TH_OPENING (TH_SYN|TH_ACK) |
| 142 | /* |
| 143 | * is_flags: |
| 144 | * Bits 0 - 3 are use as a mask with the current packet's bits to check for |
| 145 | * whether it is short, tcp/udp, a fragment or the presence of IP options. |
| 146 | * Bits 4 - 7 are set from the initial packet and contain what the packet |
| 147 | * anded with bits 0-3 must match. |
| 148 | * Bits 8,9 are used to indicate wildcard source/destination port matching. |
| 149 | * Bits 10,11 are reserved for other wildcard flag compatibility. |
| 150 | * Bits 12,13 are for scaning. |
| 151 | */ |
| 152 | |
| 153 | typedef struct ipstate_save { |
| 154 | void *ips_next; |
| 155 | struct ipstate ips_is; |
| 156 | struct frentry ips_fr; |
| 157 | } ipstate_save_t; |
| 158 | |
| 159 | #define ips_rule ips_is.is_rule |
| 160 | |
| 161 | |
| 162 | typedef struct ipslog { |
| 163 | U_QUAD_T isl_pkts[4]; |
| 164 | U_QUAD_T isl_bytes[4]; |
| 165 | i6addr_t isl_src; |
| 166 | i6addr_t isl_dst; |
| 167 | u_32_t isl_tag; |
| 168 | u_short isl_type; |
| 169 | union { |
| 170 | u_short isl_filler[2]; |
| 171 | u_short isl_ports[2]; |
| 172 | u_short isl_icmp; |
| 173 | } isl_ps; |
| 174 | u_char isl_v; |
| 175 | u_char isl_p; |
| 176 | u_char isl_flags; |
| 177 | u_char isl_state[2]; |
| 178 | u_32_t isl_rulen; |
| 179 | char isl_group[FR_GROUPLEN]; |
| 180 | } ipslog_t; |
| 181 | |
| 182 | #define isl_sport isl_ps.isl_ports[0] |
| 183 | #define isl_dport isl_ps.isl_ports[1] |
| 184 | #define isl_itype isl_ps.isl_icmp |
| 185 | |
| 186 | #define ISL_NEW 0 |
| 187 | #define ISL_CLONE 1 |
| 188 | #define ISL_STATECHANGE 2 |
| 189 | #define ISL_EXPIRE 0xffff |
| 190 | #define ISL_FLUSH 0xfffe |
| 191 | #define ISL_REMOVE 0xfffd |
| 192 | #define ISL_INTERMEDIATE 0xfffc |
| 193 | #define ISL_KILLED 0xfffb |
| 194 | #define ISL_ORPHAN 0xfffa |
| 195 | #define ISL_UNLOAD 0xfff9 |
| 196 | |
| 197 | |
| 198 | typedef struct ips_stat { |
| 199 | u_int iss_active; |
| 200 | u_int iss_active_proto[256]; |
| 201 | u_long iss_add_bad; |
| 202 | u_long iss_add_dup; |
| 203 | u_long iss_add_locked; |
| 204 | u_long iss_add_oow; |
| 205 | u_long iss_bucket_full; |
| 206 | u_long iss_check_bad; |
| 207 | u_long iss_check_miss; |
| 208 | u_long iss_check_nattag; |
| 209 | u_long iss_check_notag; |
| 210 | u_long iss_clone_nomem; |
| 211 | u_long iss_cloned; |
| 212 | u_long iss_expire; |
| 213 | u_long iss_fin; |
| 214 | u_long iss_flush_all; |
| 215 | u_long iss_flush_closing; |
| 216 | u_long iss_flush_queue; |
| 217 | u_long iss_flush_state; |
| 218 | u_long iss_flush_timeout; |
| 219 | u_long iss_hits; |
| 220 | u_long iss_icmp6_icmperr; |
| 221 | u_long iss_icmp6_miss; |
| 222 | u_long iss_icmp6_notinfo; |
| 223 | u_long iss_icmp6_notquery; |
| 224 | u_long iss_icmp_bad; |
| 225 | u_long iss_icmp_banned; |
| 226 | u_long iss_icmp_headblock; |
| 227 | u_long iss_icmp_hits; |
| 228 | u_long iss_icmp_icmperr; |
| 229 | u_long iss_icmp_miss; |
| 230 | u_long iss_icmp_notquery; |
| 231 | u_long iss_icmp_short; |
| 232 | u_long iss_icmp_toomany; |
| 233 | u_int iss_inuse; |
| 234 | ipstate_t *iss_list; |
| 235 | u_long iss_log_fail; |
| 236 | u_long iss_log_ok; |
| 237 | u_long iss_lookup_badifp; |
| 238 | u_long iss_lookup_badport; |
| 239 | u_long iss_lookup_miss; |
| 240 | u_long iss_max; |
| 241 | u_long iss_max_ref; |
| 242 | u_long iss_max_track; |
| 243 | u_long iss_miss_mask; |
| 244 | u_long iss_nomem; |
| 245 | u_long iss_oow; |
| 246 | u_long iss_orphan; |
| 247 | u_long iss_proto[256]; |
| 248 | u_long iss_scan_block; |
| 249 | u_long iss_state_max; |
| 250 | u_long iss_state_size; |
| 251 | u_long iss_states[IPF_TCP_NSTATES]; |
| 252 | ipstate_t **iss_table; |
| 253 | u_long iss_tcp_closing; |
| 254 | u_long iss_tcp_oow; |
| 255 | u_long iss_tcp_rstadd; |
| 256 | u_long iss_tcp_toosmall; |
| 257 | u_long iss_tcp_badopt; |
| 258 | u_long iss_tcp_fsm; |
| 259 | u_long iss_tcp_strict; |
| 260 | ipftq_t *iss_tcptab; |
| 261 | u_int iss_ticks; |
| 262 | u_long iss_wild; |
| 263 | u_long iss_winsack; |
| 264 | u_int *iss_bucketlen; |
| 265 | } ips_stat_t; |
| 266 | |
| 267 | |
| 268 | typedef struct ipf_state_softc_s { |
| 269 | ipfmutex_t ipf_stinsert; |
| 270 | int ipf_state_logging; |
| 271 | int ipf_state_lock; |
| 272 | int ipf_state_doflush; |
| 273 | u_int ipf_state_inited; |
| 274 | u_int ipf_state_max; |
| 275 | u_int ipf_state_maxbucket; |
| 276 | u_int ipf_state_size; |
| 277 | u_int ipf_state_wm_freq; |
| 278 | u_int ipf_state_wm_high; |
| 279 | u_int ipf_state_wm_low; |
| 280 | u_int ipf_state_wm_last; |
| 281 | u_long *ipf_state_seed; |
| 282 | ipstate_t *ipf_state_list; |
| 283 | ipstate_t **ipf_state_table; |
| 284 | ipftuneable_t *ipf_state_tune; |
| 285 | ipftq_t *ipf_state_usertq; |
| 286 | ipftq_t ipf_state_pending; |
| 287 | ipftq_t ipf_state_deletetq; |
| 288 | ipftq_t ipf_state_udptq; |
| 289 | ipftq_t ipf_state_udpacktq; |
| 290 | ipftq_t ipf_state_iptq; |
| 291 | ipftq_t ipf_state_icmptq; |
| 292 | ipftq_t ipf_state_icmpacktq; |
| 293 | ipftq_t ipf_state_tcptq[IPF_TCP_NSTATES]; |
| 294 | ips_stat_t ipf_state_stats; |
| 295 | } ipf_state_softc_t; |
| 296 | |
| 297 | |
| 298 | #ifndef _KERNEL |
| 299 | extern void ipf_state_dump(ipf_main_softc_t *, void *); |
| 300 | #endif |
| 301 | extern int ipf_tcp_age(struct ipftqent *, struct fr_info *, |
| 302 | struct ipftq *, int, int); |
| 303 | extern int ipf_tcpinwindow(struct fr_info *, struct tcpdata *, |
| 304 | struct tcpdata *, tcphdr_t *, int); |
| 305 | |
| 306 | extern int ipf_state_add(ipf_main_softc_t *, fr_info_t *, |
| 307 | ipstate_t **, u_int); |
| 308 | extern frentry_t *ipf_state_check(struct fr_info *, u_32_t *); |
| 309 | extern void ipf_state_deref(ipf_main_softc_t *, ipstate_t **); |
| 310 | extern void ipf_state_expire(ipf_main_softc_t *); |
| 311 | extern int ipf_state_flush(ipf_main_softc_t *, int, int); |
| 312 | extern ipstate_t *ipf_state_lookup(fr_info_t *, tcphdr_t *, ipftq_t **); |
| 313 | extern int ipf_state_init(void); |
| 314 | extern int ipf_state_insert(ipf_main_softc_t *, struct ipstate *, int); |
| 315 | extern int ipf_state_ioctl(ipf_main_softc_t *, void *, ioctlcmd_t, int, int, void *); |
| 316 | extern void ipf_state_log(ipf_main_softc_t *, struct ipstate *, u_int); |
| 317 | extern int ipf_state_matchflush(ipf_main_softc_t *, void *); |
| 318 | extern int ipf_state_rehash(ipf_main_softc_t *, ipftuneable_t *, ipftuneval_t *); |
| 319 | extern void ipf_state_setqueue(ipf_main_softc_t *, ipstate_t *, int); |
| 320 | extern void ipf_state_setpending(ipf_main_softc_t *, ipstate_t *); |
| 321 | extern int ipf_state_settimeout(struct ipf_main_softc_s *, ipftuneable_t *, ipftuneval_t *); |
| 322 | extern void ipf_state_sync(ipf_main_softc_t *, void *); |
| 323 | extern void ipf_state_update(fr_info_t *, ipstate_t *); |
| 324 | |
| 325 | extern void ipf_sttab_init(ipf_main_softc_t *, struct ipftq *); |
| 326 | extern void ipf_sttab_destroy(struct ipftq *); |
| 327 | extern void ipf_state_setlock(void *, int); |
| 328 | extern int ipf_state_main_load(void); |
| 329 | extern int ipf_state_main_unload(void); |
| 330 | extern void *ipf_state_soft_create(ipf_main_softc_t *); |
| 331 | extern void ipf_state_soft_destroy(ipf_main_softc_t *, void *); |
| 332 | extern int ipf_state_soft_init(ipf_main_softc_t *, void *); |
| 333 | extern int ipf_state_soft_fini(ipf_main_softc_t *, void *); |
| 334 | extern int ipf_state_main_load(void); |
| 335 | extern ipftq_t *ipf_state_add_tq(ipf_main_softc_t *, int); |
| 336 | |
| 337 | #endif /* _NETINET_IP_STATE_H_ */ |
| 338 | |