1 /* 2 * Copyright (C) 1993-2001, 2003 by Darren Reed. 3 * 4 * See the IPFILTER.LICENCE file for details on licencing. 5 * 6 * @(#)ip_fil.h 1.35 6/5/96 7 * $Id: ip_fil.h,v 2.170.2.22 2005/07/16 05:55:35 darrenr Exp $ 8 * 9 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 10 */ 11 12 #ifndef __IP_FIL_H__ 13 #define __IP_FIL_H__ 14 15 #include "netinet/ip_compat.h" 16 17 #ifndef SOLARIS 18 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 19 #endif 20 21 #ifndef __P 22 # ifdef __STDC__ 23 # define __P(x) x 24 # else 25 # define __P(x) () 26 # endif 27 #endif 28 29 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 30 # define SIOCADAFR _IOW('r', 60, struct ipfobj) 31 # define SIOCRMAFR _IOW('r', 61, struct ipfobj) 32 # define SIOCSETFF _IOW('r', 62, u_int) 33 # define SIOCGETFF _IOR('r', 63, u_int) 34 # define SIOCGETFS _IOWR('r', 64, struct ipfobj) 35 # define SIOCIPFFL _IOWR('r', 65, int) 36 # define SIOCIPFFB _IOR('r', 66, int) 37 # define SIOCADIFR _IOW('r', 67, struct ipfobj) 38 # define SIOCRMIFR _IOW('r', 68, struct ipfobj) 39 # define SIOCSWAPA _IOR('r', 69, u_int) 40 # define SIOCINAFR _IOW('r', 70, struct ipfobj) 41 # define SIOCINIFR _IOW('r', 71, struct ipfobj) 42 # define SIOCFRENB _IOW('r', 72, u_int) 43 # define SIOCFRSYN _IOW('r', 73, u_int) 44 # define SIOCFRZST _IOWR('r', 74, struct ipfobj) 45 # define SIOCZRLST _IOWR('r', 75, struct ipfobj) 46 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 47 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 48 # define SIOCATHST _IOWR('r', 78, struct ipfobj) 49 # define SIOCSTLCK _IOWR('r', 79, u_int) 50 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 51 # define SIOCSTGET _IOWR('r', 81, struct ipfobj) 52 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 53 # define SIOCGFRST _IOWR('r', 83, struct ipfobj) 54 # define SIOCSETLG _IOWR('r', 84, int) 55 # define SIOCGETLG _IOWR('r', 85, int) 56 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 57 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 58 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 59 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 60 # define SIOCIPFL6 _IOWR('r', 90, int) 61 # define SIOCIPFLP _IOWR('r', 91, int) 62 # define SIOCIPFITER _IOWR('r', 92, struct ipfobj) 63 # define SIOCGENITER _IOWR('r', 93, struct ipfobj) 64 # define SIOCGTABL _IOWR('r', 94, struct ipfobj) 65 # define SIOCIPFDELTOK _IOWR('r', 95, int) 66 # define SIOCLOOKUPITER _IOWR('r', 96, struct ipfobj) 67 #else 68 # define SIOCADAFR _IOW(r, 60, struct ipfobj) 69 # define SIOCRMAFR _IOW(r, 61, struct ipfobj) 70 # define SIOCSETFF _IOW(r, 62, u_int) 71 # define SIOCGETFF _IOR(r, 63, u_int) 72 # define SIOCGETFS _IOWR(r, 64, struct ipfobj) 73 # define SIOCIPFFL _IOWR(r, 65, int) 74 # define SIOCIPFFB _IOR(r, 66, int) 75 # define SIOCADIFR _IOW(r, 67, struct ipfobj) 76 # define SIOCRMIFR _IOW(r, 68, struct ipfobj) 77 # define SIOCSWAPA _IOR(r, 69, u_int) 78 # define SIOCINAFR _IOW(r, 70, struct ipfobj) 79 # define SIOCINIFR _IOW(r, 71, struct ipfobj) 80 # define SIOCFRENB _IOW(r, 72, u_int) 81 # define SIOCFRSYN _IOW(r, 73, u_int) 82 # define SIOCFRZST _IOWR(r, 74, struct ipfobj) 83 # define SIOCZRLST _IOWR(r, 75, struct ipfobj) 84 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 85 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 86 # define SIOCATHST _IOWR(r, 78, struct ipfobj) 87 # define SIOCSTLCK _IOWR(r, 79, u_int) 88 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 89 # define SIOCSTGET _IOWR(r, 81, struct ipfobj) 90 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 91 # define SIOCGFRST _IOWR(r, 83, struct ipfobj) 92 # define SIOCSETLG _IOWR(r, 84, int) 93 # define SIOCGETLG _IOWR(r, 85, int) 94 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 95 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 96 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 97 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 98 # define SIOCIPFL6 _IOWR(r, 90, int) 99 # define SIOCIPFLP _IOWR(r, 91, int) 100 # define SIOCIPFITER _IOWR(r, 92, struct ipfobj) 101 # define SIOCGENITER _IOWR(r, 93, struct ipfobj) 102 # define SIOCGTABL _IOWR(r, 94, struct ipfobj) 103 # define SIOCIPFDELTOK _IOWR(r, 95, int) 104 # define SIOCLOOKUPITER _IOWR(r, 96, struct ipfobj) 105 #endif 106 #define SIOCADDFR SIOCADAFR 107 #define SIOCDELFR SIOCRMAFR 108 #define SIOCINSFR SIOCINAFR 109 110 /* 111 * What type of table is getting flushed? 112 */ 113 114 #define NAT_FLUSH 1 115 #define STATE_FLUSH 2 116 117 /* 118 * What table flush options are available? 119 */ 120 121 #define FLUSH_LIST 0 122 #define FLUSH_TABLE_ALL 1 /* Flush entire table */ 123 #define FLUSH_TABLE_CLOSING 2 /* Flush "closing" entries" */ 124 #define FLUSH_TABLE_EXTRA 3 /* Targetted flush: almost closed, long idle */ 125 126 #define VALID_TABLE_FLUSH_OPT(x) ((x) >= 1 && (x) <= 3) 127 128 /* 129 * Define the default hi and lo watermarks used when flushing the 130 * tables. The values represent percent full of respective tables. 131 */ 132 133 #define NAT_FLUSH_HI 95 134 #define NAT_FLUSH_LO 75 135 136 #define ST_FLUSH_HI 95 137 #define ST_FLUSH_LO 75 138 139 /* 140 * How full are the tables? 141 */ 142 143 #define NAT_TAB_WATER_LEVEL(x) ((x)->ifs_nat_stats.ns_inuse * 100 \ 144 / (x)->ifs_ipf_nattable_max) 145 146 #define ST_TAB_WATER_LEVEL(x) ((x)->ifs_ips_num * 100 \ 147 / (x)->ifs_fr_statemax) 148 149 struct ipscan; 150 struct ifnet; 151 152 typedef struct ipf_stack ipf_stack_t; 153 typedef struct fr_info fr_info_t; 154 155 typedef int (* lookupfunc_t) __P((void *, int, void *, fr_info_t *, ipf_stack_t *)); 156 157 /* 158 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 159 * as other types of objects, depending on its qualifier. 160 */ 161 #ifdef USE_INET6 162 typedef union i6addr { 163 u_32_t i6[4]; 164 struct in_addr in4; 165 struct in6_addr in6; 166 void *vptr[2]; 167 lookupfunc_t lptr[2]; 168 } i6addr_t; 169 #define in6_addr8 in6.s6_addr 170 #else 171 typedef union i6addr { 172 u_32_t i6[4]; 173 struct in_addr in4; 174 void *vptr[2]; 175 lookupfunc_t lptr[2]; 176 } i6addr_t; 177 #endif 178 179 #define in4_addr in4.s_addr 180 #define iplookupnum i6[0] 181 #define iplookuptype i6[1] 182 /* 183 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 184 */ 185 #define iplookupptr vptr[0] 186 #define iplookupfunc lptr[1] 187 188 #define I60(x) (((i6addr_t *)(x))->i6[0]) 189 #define I61(x) (((i6addr_t *)(x))->i6[1]) 190 #define I62(x) (((i6addr_t *)(x))->i6[2]) 191 #define I63(x) (((i6addr_t *)(x))->i6[3]) 192 #define HI60(x) ntohl(((i6addr_t *)(x))->i6[0]) 193 #define HI61(x) ntohl(((i6addr_t *)(x))->i6[1]) 194 #define HI62(x) ntohl(((i6addr_t *)(x))->i6[2]) 195 #define HI63(x) ntohl(((i6addr_t *)(x))->i6[3]) 196 197 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 198 (I61(a) == I61(b)) && (I60(a) == I60(b))) 199 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 200 (I61(a) != I61(b)) || (I60(a) != I60(b))) 201 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 202 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 203 #define IP6_ISONES(a) ((I63(a) == 0xffffffff) && (I62(a) == 0xffffffff) && \ 204 (I61(a) == 0xffffffff) && (I60(a) == 0xffffffff)) 205 #define IP6_GT(a,b) (ntohl(HI60(a)) > ntohl(HI60(b)) || \ 206 (HI60(a) == HI60(b) && \ 207 (ntohl(HI61(a)) > ntohl(HI61(b)) || \ 208 (HI61(a) == HI61(b) && \ 209 (ntohl(HI62(a)) > ntohl(HI62(b)) || \ 210 (HI62(a) == HI62(b) && \ 211 ntohl(HI63(a)) > ntohl(HI63(b)))))))) 212 #define IP6_LT(a,b) (ntohl(HI60(a)) < ntohl(HI60(b)) || \ 213 (HI60(a) == HI60(b) && \ 214 (ntohl(HI61(a)) < ntohl(HI61(b)) || \ 215 (HI61(a) == HI61(b) && \ 216 (ntohl(HI62(a)) < ntohl(HI62(b)) || \ 217 (HI62(a) == HI62(b) && \ 218 ntohl(HI63(a)) < ntohl(HI63(b)))))))) 219 #define NLADD(n,x) htonl(ntohl(n) + (x)) 220 #define IP6_INC(a) \ 221 { i6addr_t *_i6 = (i6addr_t *)(a); \ 222 _i6->i6[3] = NLADD(_i6->i6[3], 1); \ 223 if (_i6->i6[3] == 0) { \ 224 _i6->i6[2] = NLADD(_i6->i6[2], 1); \ 225 if (_i6->i6[2] == 0) { \ 226 _i6->i6[1] = NLADD(_i6->i6[1], 1); \ 227 if (_i6->i6[1] == 0) { \ 228 _i6->i6[0] = NLADD(_i6->i6[0], 1); \ 229 } \ 230 } \ 231 } \ 232 } 233 #define IP6_ADD(a,x,d) \ 234 { i6addr_t *_s = (i6addr_t *)(a); \ 235 i6addr_t *_d = (i6addr_t *)(d); \ 236 _d->i6[3] = NLADD(_s->i6[3], x); \ 237 if (ntohl(_d->i6[3]) < ntohl(_s->i6[3])) { \ 238 _d->i6[2] = NLADD(_d->i6[2], 1); \ 239 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 240 _d->i6[1] = NLADD(_d->i6[1], 1); \ 241 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 242 _d->i6[0] = NLADD(_d->i6[0], 1); \ 243 } \ 244 } \ 245 } \ 246 } 247 #define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \ 248 i6addr_t *_s2 = (i6addr_t *)(b); \ 249 i6addr_t *_d = (i6addr_t *)(d); \ 250 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 251 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 252 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 253 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 254 } 255 #define IP6_MASKEQ(a,m,b) \ 256 (((I60(a) & I60(m)) == I60(b)) && \ 257 ((I61(a) & I61(m)) == I61(b)) && \ 258 ((I62(a) & I62(m)) == I62(b)) && \ 259 ((I63(a) & I63(m)) == I63(b))) 260 #define IP6_MASKNEQ(a,m,b) \ 261 (((I60(a) & I60(m)) != I60(b)) || \ 262 ((I61(a) & I61(m)) != I61(b)) || \ 263 ((I62(a) & I62(m)) != I62(b)) || \ 264 ((I63(a) & I63(m)) != I63(b))) 265 #define IP6_MERGE(a,b,c) \ 266 { i6addr_t *_d, *_s1, *_s2; \ 267 _d = (i6addr_t *)(a); \ 268 _s1 = (i6addr_t *)(b); \ 269 _s2 = (i6addr_t *)(c); \ 270 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 271 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 272 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 273 _d->i6[3] |= _s1->i6[3] & ~_s2->i6[3]; \ 274 } 275 276 277 typedef struct fr_ip { 278 u_32_t fi_v:4; /* IP version */ 279 u_32_t fi_xx:4; /* spare */ 280 u_32_t fi_tos:8; /* IP packet TOS */ 281 u_32_t fi_ttl:8; /* IP packet TTL */ 282 u_32_t fi_p:8; /* IP packet protocol */ 283 u_32_t fi_optmsk; /* bitmask composed from IP options */ 284 i6addr_t fi_src; /* source address from packet */ 285 i6addr_t fi_dst; /* destination address from packet */ 286 u_short fi_secmsk; /* bitmask composed from IP security options */ 287 u_short fi_auth; /* authentication code from IP sec. options */ 288 u_32_t fi_flx; /* packet flags */ 289 u_32_t fi_tcpmsk; /* TCP options set/reset */ 290 u_32_t fi_res1; /* RESERVED */ 291 } fr_ip_t; 292 293 /* 294 * For use in fi_flx 295 */ 296 #define FI_TCPUDP 0x0001 /* TCP/UCP implied comparison*/ 297 #define FI_OPTIONS 0x0002 298 #define FI_FRAG 0x0004 299 #define FI_SHORT 0x0008 300 #define FI_NATED 0x0010 301 #define FI_MULTICAST 0x0020 302 #define FI_BROADCAST 0x0040 303 #define FI_MBCAST 0x0080 304 #define FI_STATE 0x0100 305 #define FI_BADNAT 0x0200 306 #define FI_BAD 0x0400 307 #define FI_OOW 0x0800 /* Out of state window, else match */ 308 #define FI_ICMPERR 0x1000 309 #define FI_FRAGBODY 0x2000 310 #define FI_BADSRC 0x4000 311 #define FI_LOWTTL 0x8000 312 #define FI_CMP 0xcf03 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL,broadcast */ 313 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 314 #define FI_WITH 0xeffe /* Not FI_TCPUDP */ 315 #define FI_V6EXTHDR 0x10000 316 #define FI_COALESCE 0x20000 317 #define FI_ICMPQUERY 0x40000 318 #define FI_NEWNAT 0x80000 319 #define FI_MOREFRAG 0x100000 320 #define FI_NEG_OOW 0x10000000 /* packet underflows TCP window */ 321 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 322 #define FI_DONTCACHE 0x40000000 /* don't cache the result */ 323 #define FI_IGNORE 0x80000000 324 325 #define fi_saddr fi_src.in4.s_addr 326 #define fi_daddr fi_dst.in4.s_addr 327 #define fi_srcnum fi_src.iplookupnum 328 #define fi_dstnum fi_dst.iplookupnum 329 #define fi_srctype fi_src.iplookuptype 330 #define fi_dsttype fi_dst.iplookuptype 331 #define fi_srcptr fi_src.iplookupptr 332 #define fi_dstptr fi_dst.iplookupptr 333 #define fi_srcfunc fi_src.iplookupfunc 334 #define fi_dstfunc fi_dst.iplookupfunc 335 336 337 /* 338 * These are both used by the state and NAT code to indicate that one port or 339 * the other should be treated as a wildcard. 340 * NOTE: When updating, check bit masks in ip_state.h and update there too. 341 */ 342 #define SI_W_SPORT 0x00000100 343 #define SI_W_DPORT 0x00000200 344 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 345 #define SI_W_SADDR 0x00000400 346 #define SI_W_DADDR 0x00000800 347 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 348 #define SI_NEWFR 0x00001000 349 #define SI_CLONE 0x00002000 350 #define SI_CLONED 0x00004000 351 352 353 354 355 struct fr_info { 356 void *fin_ifp; /* interface packet is `on' */ 357 fr_ip_t fin_fi; /* IP Packet summary */ 358 union { 359 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */ 360 u_32_t fid_32; 361 } fin_dat; 362 int fin_out; /* in or out ? 1 == out, 0 == in */ 363 int fin_rev; /* state only: 1 = reverse */ 364 u_short fin_hlen; /* length of IP header in bytes */ 365 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ 366 u_char fin_icode; /* ICMP error to return */ 367 u_32_t fin_rule; /* rule # last matched */ 368 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 369 struct frentry *fin_fr; /* last matching rule */ 370 void *fin_dp; /* start of data past IP header */ 371 int fin_dlen; /* length of data portion of packet */ 372 int fin_plen; 373 int fin_ipoff; /* # bytes from buffer start to hdr */ 374 u_32_t fin_id; /* IP packet id field */ 375 u_short fin_off; 376 int fin_depth; /* Group nesting depth */ 377 int fin_error; /* Error code to return */ 378 u_int fin_pktnum; 379 void *fin_nattag; 380 union { 381 ip_t *fip_ip; 382 #ifdef USE_INET6 383 ip6_t *fip_ip6; 384 #endif 385 } fin_ipu; 386 mb_t **fin_mp; /* pointer to pointer to mbuf */ 387 mb_t *fin_m; /* pointer to mbuf */ 388 #ifdef MENTAT 389 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 390 void *fin_qpi; 391 ipf_stack_t *fin_ifs; 392 #endif 393 #ifdef __sgi 394 void *fin_hbuf; 395 #endif 396 }; 397 398 #define fin_ip fin_ipu.fip_ip 399 #define fin_ip6 fin_ipu.fip_ip6 400 #define fin_v fin_fi.fi_v 401 #define fin_p fin_fi.fi_p 402 #define fin_flx fin_fi.fi_flx 403 #define fin_optmsk fin_fi.fi_optmsk 404 #define fin_secmsk fin_fi.fi_secmsk 405 #define fin_auth fin_fi.fi_auth 406 #define fin_src fin_fi.fi_src.in4 407 #define fin_saddr fin_fi.fi_saddr 408 #define fin_dst fin_fi.fi_dst.in4 409 #define fin_daddr fin_fi.fi_daddr 410 #define fin_data fin_dat.fid_16 411 #define fin_sport fin_dat.fid_16[0] 412 #define fin_dport fin_dat.fid_16[1] 413 #define fin_ports fin_dat.fid_32 414 415 #ifdef USE_INET6 416 # define fin_src6 fin_fi.fi_src 417 # define fin_dst6 fin_fi.fi_dst 418 # define fin_dstip6 fin_fi.fi_dst.in6 419 # define fin_srcip6 fin_fi.fi_src.in6 420 #endif 421 422 #define IPF_IN 0 423 #define IPF_OUT 1 424 425 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *)); 426 typedef int (*ipfuncinit_t) __P((struct frentry *, 427 ipf_stack_t *)); 428 429 typedef struct ipfunc_resolve { 430 char ipfu_name[32]; 431 ipfunc_t ipfu_addr; 432 ipfuncinit_t ipfu_init; 433 } ipfunc_resolve_t; 434 435 /* 436 * Size for compares on fr_info structures 437 */ 438 #define FI_CSIZE offsetof(fr_info_t, fin_icode) 439 #define FI_LCSIZE offsetof(fr_info_t, fin_dp) 440 441 /* 442 * Size for copying cache fr_info structure 443 */ 444 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 445 446 /* 447 * Structure for holding IPFilter's tag information 448 */ 449 #define IPFTAG_LEN 16 450 typedef struct { 451 union { 452 u_32_t iptu_num[4]; 453 char iptu_tag[IPFTAG_LEN]; 454 } ipt_un; 455 int ipt_not; 456 } ipftag_t; 457 458 #define ipt_tag ipt_un.iptu_tag 459 #define ipt_num ipt_un.iptu_num 460 461 462 /* 463 * This structure is used to hold information about the next hop for where 464 * to forward a packet. 465 */ 466 typedef struct frdest { 467 void *fd_ifp; 468 i6addr_t fd_ip6; 469 char fd_ifname[LIFNAMSIZ]; 470 } frdest_t; 471 472 #define fd_ip fd_ip6.in4 473 474 475 /* 476 * This structure holds information about a port comparison. 477 */ 478 typedef struct frpcmp { 479 int frp_cmp; /* data for port comparisons */ 480 u_short frp_port; /* top port for <> and >< */ 481 u_short frp_top; /* top port for <> and >< */ 482 } frpcmp_t; 483 484 #define FR_NONE 0 485 #define FR_EQUAL 1 486 #define FR_NEQUAL 2 487 #define FR_LESST 3 488 #define FR_GREATERT 4 489 #define FR_LESSTE 5 490 #define FR_GREATERTE 6 491 #define FR_OUTRANGE 7 492 #define FR_INRANGE 8 493 #define FR_INCRANGE 9 494 495 /* 496 * Structure containing all the relevant TCP things that can be checked in 497 * a filter rule. 498 */ 499 typedef struct frtuc { 500 u_char ftu_tcpfm; /* tcp flags mask */ 501 u_char ftu_tcpf; /* tcp flags */ 502 frpcmp_t ftu_src; 503 frpcmp_t ftu_dst; 504 } frtuc_t; 505 506 #define ftu_scmp ftu_src.frp_cmp 507 #define ftu_dcmp ftu_dst.frp_cmp 508 #define ftu_sport ftu_src.frp_port 509 #define ftu_dport ftu_dst.frp_port 510 #define ftu_stop ftu_src.frp_top 511 #define ftu_dtop ftu_dst.frp_top 512 513 #define FR_TCPFMAX 0x3f 514 515 /* 516 * This structure makes up what is considered to be the IPFilter specific 517 * matching components of a filter rule, as opposed to the data structures 518 * used to define the result which are in frentry_t and not here. 519 */ 520 typedef struct fripf { 521 fr_ip_t fri_ip; 522 fr_ip_t fri_mip; /* mask structure */ 523 524 u_short fri_icmpm; /* data for ICMP packets (mask) */ 525 u_short fri_icmp; 526 527 frtuc_t fri_tuc; 528 int fri_satype; /* addres type */ 529 int fri_datype; /* addres type */ 530 int fri_sifpidx; /* doing dynamic addressing */ 531 int fri_difpidx; /* index into fr_ifps[] to use when */ 532 } fripf_t; 533 534 #define fri_dstnum fri_ip.fi_dstnum 535 #define fri_srcnum fri_mip.fi_srcnum 536 #define fri_dstptr fri_ip.fi_dstptr 537 #define fri_srcptr fri_mip.fi_srcptr 538 539 #define FRI_NORMAL 0 /* Normal address */ 540 #define FRI_DYNAMIC 1 /* dynamic address */ 541 #define FRI_LOOKUP 2 /* address is a pool # */ 542 #define FRI_RANGE 3 /* address/mask is a range */ 543 #define FRI_NETWORK 4 /* network address from if */ 544 #define FRI_BROADCAST 5 /* broadcast address from if */ 545 #define FRI_PEERADDR 6 /* Peer address for P-to-P */ 546 #define FRI_NETMASKED 7 /* network address with netmask from if */ 547 548 549 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *)); 550 551 typedef struct frentry { 552 ipfmutex_t fr_lock; 553 struct frentry *fr_next; 554 struct frentry **fr_grp; 555 struct ipscan *fr_isc; 556 void *fr_ifas[4]; 557 void *fr_ptr; /* for use with fr_arg */ 558 char *fr_comment; /* text comment for rule */ 559 int fr_ref; /* reference count - for grouping */ 560 int fr_statecnt; /* state count - for limit rules */ 561 /* 562 * These are only incremented when a packet matches this rule and 563 * it is the last match 564 */ 565 U_QUAD_T fr_hits; 566 U_QUAD_T fr_bytes; 567 568 /* 569 * For PPS rate limiting 570 */ 571 struct timeval fr_lastpkt; 572 int fr_curpps; 573 574 union { 575 void *fru_data; 576 caddr_t fru_caddr; 577 fripf_t *fru_ipf; 578 frentfunc_t fru_func; 579 } fr_dun; 580 581 /* 582 * Fields after this may not change whilst in the kernel. 583 */ 584 ipfunc_t fr_func; /* call this function */ 585 int fr_dsize; 586 int fr_pps; 587 int fr_statemax; /* max reference count */ 588 int fr_flineno; /* line number from conf file */ 589 u_32_t fr_type; 590 u_32_t fr_flags; /* per-rule flags && options (see below) */ 591 u_32_t fr_logtag; /* user defined log tag # */ 592 u_32_t fr_collect; /* collection number */ 593 u_int fr_arg; /* misc. numeric arg for rule */ 594 u_int fr_loglevel; /* syslog log facility + priority */ 595 u_int fr_age[2]; /* non-TCP timeouts */ 596 u_char fr_v; 597 u_char fr_icode; /* return ICMP code */ 598 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */ 599 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */ 600 ipftag_t fr_nattag; 601 char fr_ifnames[4][LIFNAMSIZ]; 602 char fr_isctag[16]; 603 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 604 frdest_t fr_dif; /* duplicate packet interface */ 605 /* 606 * This must be last and will change after loaded into the kernel. 607 */ 608 u_int fr_cksum; /* checksum on filter rules for performance */ 609 } frentry_t; 610 611 #define fr_caddr fr_dun.fru_caddr 612 #define fr_data fr_dun.fru_data 613 #define fr_dfunc fr_dun.fru_func 614 #define fr_ipf fr_dun.fru_ipf 615 #define fr_ip fr_ipf->fri_ip 616 #define fr_mip fr_ipf->fri_mip 617 #define fr_icmpm fr_ipf->fri_icmpm 618 #define fr_icmp fr_ipf->fri_icmp 619 #define fr_tuc fr_ipf->fri_tuc 620 #define fr_satype fr_ipf->fri_satype 621 #define fr_datype fr_ipf->fri_datype 622 #define fr_sifpidx fr_ipf->fri_sifpidx 623 #define fr_difpidx fr_ipf->fri_difpidx 624 #define fr_proto fr_ip.fi_p 625 #define fr_mproto fr_mip.fi_p 626 #define fr_ttl fr_ip.fi_ttl 627 #define fr_mttl fr_mip.fi_ttl 628 #define fr_tos fr_ip.fi_tos 629 #define fr_mtos fr_mip.fi_tos 630 #define fr_tcpfm fr_tuc.ftu_tcpfm 631 #define fr_tcpf fr_tuc.ftu_tcpf 632 #define fr_scmp fr_tuc.ftu_scmp 633 #define fr_dcmp fr_tuc.ftu_dcmp 634 #define fr_dport fr_tuc.ftu_dport 635 #define fr_sport fr_tuc.ftu_sport 636 #define fr_stop fr_tuc.ftu_stop 637 #define fr_dtop fr_tuc.ftu_dtop 638 #define fr_dst fr_ip.fi_dst.in4 639 #define fr_daddr fr_ip.fi_dst.in4.s_addr 640 #define fr_src fr_ip.fi_src.in4 641 #define fr_saddr fr_ip.fi_src.in4.s_addr 642 #define fr_dmsk fr_mip.fi_dst.in4 643 #define fr_dmask fr_mip.fi_dst.in4.s_addr 644 #define fr_smsk fr_mip.fi_src.in4 645 #define fr_smask fr_mip.fi_src.in4.s_addr 646 #define fr_dstnum fr_ip.fi_dstnum 647 #define fr_srcnum fr_ip.fi_srcnum 648 #define fr_dsttype fr_ip.fi_dsttype 649 #define fr_srctype fr_ip.fi_srctype 650 #define fr_dstptr fr_mip.fi_dstptr 651 #define fr_srcptr fr_mip.fi_srcptr 652 #define fr_dstfunc fr_mip.fi_dstfunc 653 #define fr_srcfunc fr_mip.fi_srcfunc 654 #define fr_optbits fr_ip.fi_optmsk 655 #define fr_optmask fr_mip.fi_optmsk 656 #define fr_secbits fr_ip.fi_secmsk 657 #define fr_secmask fr_mip.fi_secmsk 658 #define fr_authbits fr_ip.fi_auth 659 #define fr_authmask fr_mip.fi_auth 660 #define fr_flx fr_ip.fi_flx 661 #define fr_mflx fr_mip.fi_flx 662 #define fr_ifname fr_ifnames[0] 663 #define fr_oifname fr_ifnames[2] 664 #define fr_ifa fr_ifas[0] 665 #define fr_oifa fr_ifas[2] 666 #define fr_tif fr_tifs[0] 667 #define fr_rif fr_tifs[1] 668 669 #define FR_NOLOGTAG 0 670 671 #ifndef offsetof 672 #define offsetof(t,m) (int)((&((t *)0L)->m)) 673 #endif 674 #define FR_CMPSIZ (sizeof(struct frentry) - \ 675 offsetof(struct frentry, fr_func)) 676 677 /* 678 * fr_type 679 */ 680 #define FR_T_NONE 0 681 #define FR_T_IPF 1 /* IPF structures */ 682 #define FR_T_BPFOPC 2 /* BPF opcode */ 683 #define FR_T_CALLFUNC 3 /* callout to function in fr_func only */ 684 #define FR_T_COMPIPF 4 /* compiled C code */ 685 #define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */ 686 687 /* 688 * fr_flags 689 */ 690 #define FR_CALL 0x00000 /* call rule */ 691 #define FR_BLOCK 0x00001 /* do not allow packet to pass */ 692 #define FR_PASS 0x00002 /* allow packet to pass */ 693 #define FR_AUTH 0x00003 /* use authentication */ 694 #define FR_PREAUTH 0x00004 /* require preauthentication */ 695 #define FR_ACCOUNT 0x00005 /* Accounting rule */ 696 #define FR_SKIP 0x00006 /* skip rule */ 697 #define FR_DIVERT 0x00007 /* divert rule */ 698 #define FR_CMDMASK 0x0000f 699 #define FR_LOG 0x00010 /* Log */ 700 #define FR_LOGB 0x00011 /* Log-fail */ 701 #define FR_LOGP 0x00012 /* Log-pass */ 702 #define FR_LOGMASK (FR_LOG|FR_CMDMASK) 703 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 704 #define FR_NOTSRCIP 0x00040 705 #define FR_NOTDSTIP 0x00080 706 #define FR_QUICK 0x00100 /* match & stop processing list */ 707 #define FR_KEEPFRAG 0x00200 /* keep fragment information */ 708 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 709 #define FR_FASTROUTE 0x00800 /* bypass normal routing */ 710 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 711 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 712 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 713 #define FR_OUTQUE 0x04000 /* outgoing packets */ 714 #define FR_INQUE 0x08000 /* ingoing packets */ 715 #define FR_LOGBODY 0x10000 /* Log the body */ 716 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 717 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 718 #define FR_DUP 0x80000 /* duplicate packet */ 719 #define FR_FRSTRICT 0x100000 /* strict frag. cache */ 720 #define FR_STSTRICT 0x200000 /* strict keep state */ 721 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 722 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 723 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 724 #define FR_NOMATCH 0x8000000 /* no match occured */ 725 /* 0x10000000 FF_LOGPASS */ 726 /* 0x20000000 FF_LOGBLOCK */ 727 /* 0x40000000 FF_LOGNOMATCH */ 728 /* 0x80000000 FF_BLOCKNONIP */ 729 #define FR_COPIED 0x40000000 /* copied from user space */ 730 #define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */ 731 732 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 733 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 734 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 735 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 736 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 737 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 738 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 739 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 740 #define FR_INOUT (FR_INQUE|FR_OUTQUE) 741 742 /* 743 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 744 */ 745 #define FF_LOGPASS 0x10000000 746 #define FF_LOGBLOCK 0x20000000 747 #define FF_LOGNOMATCH 0x40000000 748 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 749 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 750 751 752 /* 753 * Structure that passes information on what/how to flush to the kernel. 754 */ 755 typedef struct ipfflush { 756 int ipflu_how; 757 int ipflu_arg; 758 } ipfflush_t; 759 760 761 /* 762 * 763 */ 764 typedef struct ipfgetctl { 765 u_int ipfg_min; /* min value */ 766 u_int ipfg_current; /* current value */ 767 u_int ipfg_max; /* max value */ 768 u_int ipfg_default; /* default value */ 769 u_int ipfg_steps; /* value increments */ 770 char ipfg_name[40]; /* tag name for this control */ 771 } ipfgetctl_t; 772 773 typedef struct ipfsetctl { 774 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 775 u_int ipfs_value; /* min value */ 776 char ipfs_name[40]; /* tag name for this control */ 777 } ipfsetctl_t; 778 779 780 /* 781 * Some of the statistics below are in their own counters, but most are kept 782 * in this single structure so that they can all easily be collected and 783 * copied back as required. 784 * 785 * NOTE: when changing, keep in sync with kstats (below). 786 */ 787 typedef struct filterstats { 788 u_long fr_pass; /* packets allowed */ 789 u_long fr_block; /* packets denied */ 790 u_long fr_nom; /* packets which don't match any rule */ 791 u_long fr_short; /* packets which are short */ 792 u_long fr_ppkl; /* packets allowed and logged */ 793 u_long fr_bpkl; /* packets denied and logged */ 794 u_long fr_npkl; /* packets unmatched and logged */ 795 u_long fr_pkl; /* packets logged */ 796 u_long fr_skip; /* packets to be logged but buffer full */ 797 u_long fr_ret; /* packets for which a return is sent */ 798 u_long fr_acct; /* packets for which counting was performed */ 799 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 800 u_long fr_nfr; /* new fragment state kept */ 801 u_long fr_cfr; /* add new fragment state but complete pkt */ 802 u_long fr_bads; /* bad attempts to allocate packet state */ 803 u_long fr_ads; /* new packet state kept */ 804 u_long fr_chit; /* cached hit */ 805 u_long fr_tcpbad; /* TCP checksum check failures */ 806 u_long fr_pull[2]; /* good and bad pullup attempts */ 807 u_long fr_badsrc; /* source received doesn't match route */ 808 u_long fr_badttl; /* TTL in packet doesn't reach minimum */ 809 u_long fr_bad; /* bad IP packets to the filter */ 810 u_long fr_ipv6; /* IPv6 packets in/out */ 811 u_long fr_ppshit; /* dropped because of pps ceiling */ 812 u_long fr_ipud; /* IP id update failures */ 813 } filterstats_t; 814 815 /* 816 * kstat "copy" of the above - keep in sync! 817 * also keep in sync with initialisation code in solaris.c, ipf_kstat_init(). 818 */ 819 typedef struct filter_kstats { 820 kstat_named_t fks_pass; /* see above for comments */ 821 kstat_named_t fks_block; 822 kstat_named_t fks_nom; 823 kstat_named_t fks_short; 824 kstat_named_t fks_ppkl; 825 kstat_named_t fks_bpkl; 826 kstat_named_t fks_npkl; 827 kstat_named_t fks_pkl; 828 kstat_named_t fks_skip; 829 kstat_named_t fks_ret; 830 kstat_named_t fks_acct; 831 kstat_named_t fks_bnfr; 832 kstat_named_t fks_nfr; 833 kstat_named_t fks_cfr; 834 kstat_named_t fks_bads; 835 kstat_named_t fks_ads; 836 kstat_named_t fks_chit; 837 kstat_named_t fks_tcpbad; 838 kstat_named_t fks_pull[2]; 839 kstat_named_t fks_badsrc; 840 kstat_named_t fks_badttl; 841 kstat_named_t fks_bad; 842 kstat_named_t fks_ipv6; 843 kstat_named_t fks_ppshit; 844 kstat_named_t fks_ipud; 845 } filter_kstats_t; 846 847 /* 848 * Log structure. Each packet header logged is prepended by one of these. 849 * Following this in the log records read from the device will be an ipflog 850 * structure which is then followed by any packet data. 851 */ 852 typedef struct iplog { 853 u_32_t ipl_magic; 854 u_int ipl_count; 855 struct timeval ipl_time; 856 size_t ipl_dsize; 857 struct iplog *ipl_next; 858 } iplog_t; 859 860 #define ipl_sec ipl_time.tv_sec 861 #define ipl_usec ipl_time.tv_usec 862 863 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 864 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 865 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 866 #define IPLOG_SIZE sizeof(iplog_t) 867 868 typedef struct ipflog { 869 #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 870 (defined(OpenBSD) && (OpenBSD >= 199603)) 871 #else 872 u_int fl_unit; 873 #endif 874 u_32_t fl_rule; 875 u_32_t fl_flags; 876 u_32_t fl_lflags; 877 u_32_t fl_logtag; 878 ipftag_t fl_nattag; 879 u_short fl_plen; /* extra data after hlen */ 880 u_short fl_loglevel; /* syslog log level */ 881 char fl_group[FR_GROUPLEN]; 882 u_char fl_hlen; /* length of IP headers saved */ 883 u_char fl_dir; 884 u_char fl_xxx[2]; /* pad */ 885 char fl_ifname[LIFNAMSIZ]; 886 } ipflog_t; 887 888 #ifndef IPF_LOGGING 889 # define IPF_LOGGING 0 890 #endif 891 #ifndef IPF_DEFAULT_PASS 892 # define IPF_DEFAULT_PASS FR_PASS 893 #endif 894 895 #define DEFAULT_IPFLOGSIZE 8192 896 #ifndef IPFILTER_LOGSIZE 897 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 898 #else 899 # if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE 900 # error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE 901 # endif 902 #endif 903 904 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 905 906 /* 907 * Device filenames for reading log information. Use ipf on Solaris2 because 908 * ipl is already a name used by something else. 909 */ 910 #ifndef IPL_NAME 911 # if SOLARIS 912 # define IPL_NAME "/dev/ipf" 913 # else 914 # define IPL_NAME "/dev/ipl" 915 # endif 916 #endif 917 /* 918 * Pathnames for various IP Filter control devices. Used by LKM 919 * and userland, so defined here. 920 */ 921 #define IPNAT_NAME "/dev/ipnat" 922 #define IPSTATE_NAME "/dev/ipstate" 923 #define IPAUTH_NAME "/dev/ipauth" 924 #define IPSYNC_NAME "/dev/ipsync" 925 #define IPSCAN_NAME "/dev/ipscan" 926 #define IPLOOKUP_NAME "/dev/iplookup" 927 928 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 929 #define IPL_LOGNAT 1 930 #define IPL_LOGSTATE 2 931 #define IPL_LOGAUTH 3 932 #define IPL_LOGSYNC 4 933 #define IPL_LOGSCAN 5 934 #define IPL_LOGLOOKUP 6 935 #define IPL_LOGCOUNT 7 936 #define IPL_LOGMAX 7 937 #define IPL_LOGSIZE (IPL_LOGMAX + 1) 938 #define IPL_LOGALL -1 939 #define IPL_LOGNONE -2 940 941 /* 942 * For SIOCGETFS 943 */ 944 typedef struct friostat { 945 struct filterstats f_st[2]; 946 struct frentry *f_ipf[2][2]; 947 struct frentry *f_acct[2][2]; 948 struct frentry *f_ipf6[2][2]; 949 struct frentry *f_acct6[2][2]; 950 struct frentry *f_auth; 951 struct frgroup *f_groups[IPL_LOGSIZE][2]; 952 u_long f_froute[2]; 953 u_long f_ticks; 954 int f_locks[IPL_LOGMAX]; 955 size_t f_kmutex_sz; 956 size_t f_krwlock_sz; 957 int f_defpass; /* default pass - from fr_pass */ 958 int f_active; /* 1 or 0 - active rule set */ 959 int f_running; /* 1 if running, else 0 */ 960 int f_logging; /* 1 if enabled, else 0 */ 961 int f_features; 962 char f_version[32]; /* version string */ 963 } friostat_t; 964 965 #define f_fin f_ipf[0] 966 #define f_fin6 f_ipf6[0] 967 #define f_fout f_ipf[1] 968 #define f_fout6 f_ipf6[1] 969 #define f_acctin f_acct[0] 970 #define f_acctin6 f_acct6[0] 971 #define f_acctout f_acct[1] 972 #define f_acctout6 f_acct6[1] 973 974 #define IPF_FEAT_LKM 0x001 975 #define IPF_FEAT_LOG 0x002 976 #define IPF_FEAT_LOOKUP 0x004 977 #define IPF_FEAT_BPF 0x008 978 #define IPF_FEAT_COMPILED 0x010 979 #define IPF_FEAT_CKSUM 0x020 980 #define IPF_FEAT_SYNC 0x040 981 #define IPF_FEAT_SCAN 0x080 982 #define IPF_FEAT_IPV6 0x100 983 984 typedef struct optlist { 985 u_short ol_val; 986 int ol_bit; 987 } optlist_t; 988 989 990 /* 991 * Group list structure. 992 */ 993 typedef struct frgroup { 994 struct frgroup *fg_next; 995 struct frentry *fg_head; 996 struct frentry *fg_start; 997 u_32_t fg_flags; 998 int fg_ref; 999 char fg_name[FR_GROUPLEN]; 1000 } frgroup_t; 1001 1002 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 1003 1004 1005 /* 1006 * Used by state and NAT tables 1007 */ 1008 typedef struct icmpinfo { 1009 u_short ici_id; 1010 u_short ici_seq; 1011 u_char ici_type; 1012 } icmpinfo_t; 1013 1014 typedef struct udpinfo { 1015 u_short us_sport; 1016 u_short us_dport; 1017 } udpinfo_t; 1018 1019 1020 typedef struct tcpdata { 1021 u_32_t td_end; 1022 u_32_t td_maxend; 1023 u_32_t td_maxwin; 1024 u_32_t td_winscale; 1025 u_32_t td_maxseg; 1026 int td_winflags; 1027 } tcpdata_t; 1028 1029 #define TCP_WSCALE_MAX 14 1030 1031 #define TCP_WSCALE_SEEN 0x00000001 1032 #define TCP_WSCALE_FIRST 0x00000002 1033 #define TCP_SACK_PERMIT 0x00000004 1034 1035 1036 typedef struct tcpinfo { 1037 u_short ts_sport; 1038 u_short ts_dport; 1039 tcpdata_t ts_data[2]; 1040 } tcpinfo_t; 1041 1042 1043 /* 1044 * Structures to define a GRE header as seen in a packet. 1045 */ 1046 struct grebits { 1047 u_32_t grb_C:1; 1048 u_32_t grb_R:1; 1049 u_32_t grb_K:1; 1050 u_32_t grb_S:1; 1051 u_32_t grb_s:1; 1052 u_32_t grb_recur:1; 1053 u_32_t grb_A:1; 1054 u_32_t grb_flags:3; 1055 u_32_t grb_ver:3; 1056 u_short grb_ptype; 1057 }; 1058 1059 typedef struct grehdr { 1060 union { 1061 struct grebits gru_bits; 1062 u_short gru_flags; 1063 } gr_un; 1064 u_short gr_len; 1065 u_short gr_call; 1066 } grehdr_t; 1067 1068 #define gr_flags gr_un.gru_flags 1069 #define gr_bits gr_un.gru_bits 1070 #define gr_ptype gr_bits.grb_ptype 1071 #define gr_C gr_bits.grb_C 1072 #define gr_R gr_bits.grb_R 1073 #define gr_K gr_bits.grb_K 1074 #define gr_S gr_bits.grb_S 1075 #define gr_s gr_bits.grb_s 1076 #define gr_recur gr_bits.grb_recur 1077 #define gr_A gr_bits.grb_A 1078 #define gr_ver gr_bits.grb_ver 1079 1080 /* 1081 * GRE information tracked by "keep state" 1082 */ 1083 typedef struct greinfo { 1084 u_short gs_call[2]; 1085 u_short gs_flags; 1086 u_short gs_ptype; 1087 } greinfo_t; 1088 1089 #define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1090 1091 1092 /* 1093 * Format of an Authentication header 1094 */ 1095 typedef struct authhdr { 1096 u_char ah_next; 1097 u_char ah_plen; 1098 u_short ah_reserved; 1099 u_32_t ah_spi; 1100 u_32_t ah_seq; 1101 /* Following the sequence number field is 0 or more bytes of */ 1102 /* authentication data, as specified by ah_plen - RFC 2402. */ 1103 } authhdr_t; 1104 1105 1106 /* 1107 * Timeout tail queue list member 1108 */ 1109 typedef struct ipftqent { 1110 struct ipftqent **tqe_pnext; 1111 struct ipftqent *tqe_next; 1112 struct ipftq *tqe_ifq; 1113 void *tqe_parent; /* pointer back to NAT/state struct */ 1114 u_long tqe_die; /* when this entriy is to die */ 1115 u_long tqe_touched; 1116 int tqe_flags; 1117 int tqe_state[2]; /* current state of this entry */ 1118 } ipftqent_t; 1119 1120 #define TQE_RULEBASED 0x00000001 1121 1122 1123 /* 1124 * Timeout tail queue head for IPFilter 1125 */ 1126 typedef struct ipftq { 1127 ipfmutex_t ifq_lock; 1128 u_int ifq_ttl; 1129 ipftqent_t *ifq_head; 1130 ipftqent_t **ifq_tail; 1131 struct ipftq *ifq_next; 1132 struct ipftq **ifq_pnext; 1133 int ifq_ref; 1134 u_int ifq_flags; 1135 } ipftq_t; 1136 1137 #define IFQF_USER 0x01 /* User defined aging */ 1138 #define IFQF_DELETE 0x02 /* Marked for deletion */ 1139 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1140 1141 #define IPF_HZ_MULT 1 1142 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1143 /* checks its timeout queues. */ 1144 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1145 1146 /* 1147 * Structure to define address for pool lookups. 1148 */ 1149 typedef struct { 1150 u_char adf_len; 1151 sa_family_t adf_family; 1152 i6addr_t adf_addr; 1153 } addrfamily_t; 1154 1155 1156 /* 1157 * Object structure description. For passing through in ioctls. 1158 */ 1159 typedef struct ipfobj { 1160 u_32_t ipfo_rev; /* IPFilter version number */ 1161 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1162 void *ipfo_ptr; /* pointer to object */ 1163 int ipfo_type; /* type of object being pointed to */ 1164 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1165 u_char ipfo_xxxpad[32]; /* reserved for future use */ 1166 } ipfobj_t; 1167 1168 #define IPFOBJ_FRENTRY 0 /* struct frentry */ 1169 #define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1170 #define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1171 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1172 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1173 #define IPFOBJ_IPNAT 5 /* struct ipnat */ 1174 #define IPFOBJ_NATSTAT 6 /* struct natstat */ 1175 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1176 #define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1177 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1178 #define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1179 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1180 #define IPFOBJ_FRAUTH 12 /* struct frauth */ 1181 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1182 #define IPFOBJ_NAT 14 /* struct nat */ 1183 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1184 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1185 #define IPFOBJ_GTABLE 17 /* struct ipftable */ 1186 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1187 #define IPFOBJ_COUNT 19 /* How many #defines are above this? */ 1188 1189 1190 typedef union ipftunevalptr { 1191 void *ipftp_void; 1192 u_long *ipftp_long; 1193 u_int *ipftp_int; 1194 u_short *ipftp_short; 1195 u_char *ipftp_char; 1196 } ipftunevalptr_t; 1197 1198 typedef struct ipftuneable { 1199 ipftunevalptr_t ipft_una; 1200 char *ipft_name; 1201 u_long ipft_min; 1202 u_long ipft_max; 1203 int ipft_sz; 1204 int ipft_flags; 1205 struct ipftuneable *ipft_next; 1206 } ipftuneable_t; 1207 1208 #define ipft_addr ipft_una.ipftp_void 1209 #define ipft_plong ipft_una.ipftp_long 1210 #define ipft_pint ipft_una.ipftp_int 1211 #define ipft_pshort ipft_una.ipftp_short 1212 #define ipft_pchar ipft_una.ipftp_char 1213 1214 #define IPFT_RDONLY 1 /* read-only */ 1215 #define IPFT_WRDISABLED 2 /* write when disabled only */ 1216 1217 typedef union ipftuneval { 1218 u_long ipftu_long; 1219 u_int ipftu_int; 1220 u_short ipftu_short; 1221 u_char ipftu_char; 1222 } ipftuneval_t; 1223 1224 typedef struct ipftune { 1225 void *ipft_cookie; 1226 ipftuneval_t ipft_un; 1227 u_long ipft_min; 1228 u_long ipft_max; 1229 int ipft_sz; 1230 int ipft_flags; 1231 char ipft_name[80]; 1232 } ipftune_t; 1233 1234 #define ipft_vlong ipft_un.ipftu_long 1235 #define ipft_vint ipft_un.ipftu_int 1236 #define ipft_vshort ipft_un.ipftu_short 1237 #define ipft_vchar ipft_un.ipftu_char 1238 1239 /* 1240 * ipfruleiter is iterator structure used for filter rules. 1241 */ 1242 typedef struct ipfruleiter { 1243 int iri_ver; 1244 int iri_inout; 1245 char iri_group[FR_GROUPLEN]; 1246 int iri_active; 1247 int iri_nrules; 1248 frentry_t *iri_rule; 1249 } ipfruleiter_t; 1250 1251 /* Values for iri_inout */ 1252 #define F_IN 0 1253 #define F_OUT 1 1254 #define F_ACIN 2 1255 #define F_ACOUT 3 1256 1257 /* 1258 * ipfgeniter is generic iterator structure used for nat rules, 1259 * hostmap entries and nat table entries. 1260 */ 1261 typedef struct ipfgeniter { 1262 int igi_type; /* type of data we're looking at */ 1263 int igi_nitems; 1264 void *igi_data; 1265 } ipfgeniter_t; 1266 1267 #define IPFGENITER_IPF 0 1268 #define IPFGENITER_NAT 1 1269 #define IPFGENITER_IPNAT 2 1270 #define IPFGENITER_FRAG 3 1271 #define IPFGENITER_AUTH 4 1272 #define IPFGENITER_STATE 5 1273 #define IPFGENITER_NATFRAG 6 1274 #define IPFGENITER_HOSTMAP 7 1275 #define IPFGENITER_LOOKUP 8 1276 1277 typedef struct ipftable { 1278 int ita_type; 1279 void *ita_table; 1280 } ipftable_t; 1281 1282 typedef struct ipftoken { 1283 struct ipftoken *ipt_next; 1284 struct ipftoken **ipt_pnext; 1285 void *ipt_ctx; 1286 void *ipt_data; 1287 u_long ipt_die; 1288 int ipt_type; 1289 int ipt_uid; 1290 int ipt_subtype; 1291 int ipt_alive; 1292 } ipftoken_t; 1293 1294 1295 /* 1296 * sync commands 1297 */ 1298 #define IPFSYNC_RESYNC 0 1299 #define IPFSYNC_NEWIFP 1 1300 #define IPFSYNC_OLDIFP 2 1301 1302 1303 /* 1304 ** HPUX Port 1305 */ 1306 #ifdef __hpux 1307 /* HP-UX locking sequence deadlock detection module lock MAJOR ID */ 1308 # define IPF_SMAJ 0 /* temp assignment XXX, not critical */ 1309 #endif 1310 1311 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1312 (__FreeBSD_version >= 220000) 1313 # define CDEV_MAJOR 79 1314 #endif 1315 1316 /* 1317 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns 1318 * on those hooks. We don't need any special mods in non-IP Filter code 1319 * with this! 1320 */ 1321 #if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \ 1322 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \ 1323 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043)) 1324 # if (NetBSD >= 199905) 1325 # define PFIL_HOOKS 1326 # endif 1327 # ifdef PFIL_HOOKS 1328 # define NETBSD_PF 1329 # endif 1330 #endif 1331 1332 #ifndef _KERNEL 1333 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1334 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1335 extern int ipf_log __P((void)); 1336 extern struct ifnet *get_unit __P((char *, int, ipf_stack_t *)); 1337 extern char *get_ifname __P((struct ifnet *)); 1338 # if defined(__NetBSD__) || defined(__OpenBSD__) || \ 1339 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) 1340 extern int frrequest __P((int, u_long, caddr_t, int, int, ipf_stack_t *)); 1341 # else 1342 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int)); 1343 # endif 1344 extern int iplopen __P((dev_t, int)); 1345 extern int iplclose __P((dev_t, int)); 1346 extern void m_freem __P((mb_t *)); 1347 #else /* #ifndef _KERNEL */ 1348 extern phy_if_t get_unit __P((char *, int, ipf_stack_t *)); 1349 # if defined(__NetBSD__) && defined(PFIL_HOOKS) 1350 extern void ipfilterattach __P((int)); 1351 # endif 1352 extern int ipl_enable __P((void)); 1353 extern int ipl_disable __P((void)); 1354 # ifdef MENTAT 1355 extern ipf_stack_t *ipf_find_stack(const zoneid_t zone); 1356 extern int fr_check __P((struct ip *, int, void *, int, void *, 1357 mblk_t **, ipf_stack_t *)); 1358 # if SOLARIS 1359 # if SOLARIS2 >= 7 1360 extern int iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *)); 1361 # else 1362 extern int iplioctl __P((dev_t, int, int *, int, cred_t *, int *)); 1363 # endif 1364 # if SOLARIS2 >= 10 && defined(_KERNEL) 1365 extern int fr_make_rst __P((fr_info_t *)); 1366 extern int fr_make_icmp __P((fr_info_t *)); 1367 extern void fr_calc_chksum __P((fr_info_t *, mb_t *)); 1368 # endif 1369 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1370 extern int iplclose __P((dev_t, int, int, cred_t *)); 1371 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1372 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1373 # endif 1374 # ifdef __hpux 1375 extern int iplopen __P((dev_t, int, intptr_t, int)); 1376 extern int iplclose __P((dev_t, int, int)); 1377 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1378 extern int iplread __P((dev_t, uio_t *)); 1379 extern int iplwrite __P((dev_t, uio_t *)); 1380 extern int iplselect __P((dev_t, int)); 1381 # endif 1382 extern int ipfsync __P((ipf_stack_t *)); 1383 extern int fr_qout __P((queue_t *, mblk_t *)); 1384 # else /* MENTAT */ 1385 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1386 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1387 extern size_t mbufchainlen __P((mb_t *)); 1388 # ifdef __sgi 1389 # include <sys/cred.h> 1390 extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *)); 1391 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1392 extern int iplclose __P((dev_t, int, int, cred_t *)); 1393 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1394 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1395 extern int ipfsync __P((ipf_stack_t *)); 1396 extern int ipfilter_sgi_attach __P((void)); 1397 extern void ipfilter_sgi_detach __P((void)); 1398 extern void ipfilter_sgi_intfsync __P((void)); 1399 # else 1400 # ifdef IPFILTER_LKM 1401 extern int iplidentify __P((char *)); 1402 # endif 1403 # if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \ 1404 (NetBSD >= 199511) || defined(__OpenBSD__) 1405 # if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \ 1406 defined(__OpenBSD__) || (__FreeBSD_version >= 300000) 1407 # if (__FreeBSD_version >= 500024) 1408 # if (__FreeBSD_version >= 502116) 1409 extern int iplioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *)); 1410 # else 1411 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct thread *)); 1412 # endif /* __FreeBSD_version >= 502116 */ 1413 # else 1414 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 1415 # endif /* __FreeBSD_version >= 500024 */ 1416 # else 1417 extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *)); 1418 # endif 1419 # if (__FreeBSD_version >= 500024) 1420 # if (__FreeBSD_version >= 502116) 1421 extern int iplopen __P((struct cdev*, int, int, struct thread *)); 1422 extern int iplclose __P((struct cdev*, int, int, struct thread *)); 1423 # else 1424 extern int iplopen __P((dev_t, int, int, struct thread *)); 1425 extern int iplclose __P((dev_t, int, int, struct thread *)); 1426 # endif /* __FreeBSD_version >= 502116 */ 1427 # else 1428 extern int iplopen __P((dev_t, int, int, struct proc *)); 1429 extern int iplclose __P((dev_t, int, int, struct proc *)); 1430 # endif /* __FreeBSD_version >= 500024 */ 1431 # else 1432 # ifdef linux 1433 extern int iplioctl __P((struct inode *, struct file *, u_int, u_long)); 1434 # else 1435 extern int iplopen __P((dev_t, int)); 1436 extern int iplclose __P((dev_t, int)); 1437 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1438 # endif 1439 # endif /* (_BSDI_VERSION >= 199510) */ 1440 # if BSD >= 199306 1441 # if (__FreeBSD_version >= 502116) 1442 extern int iplread __P((struct cdev*, struct uio *, int)); 1443 extern int iplwrite __P((struct cdev*, struct uio *, int)); 1444 # else 1445 extern int iplread __P((dev_t, struct uio *, int)); 1446 extern int iplwrite __P((dev_t, struct uio *, int)); 1447 # endif /* __FreeBSD_version >= 502116 */ 1448 # else 1449 # ifndef linux 1450 extern int iplread __P((dev_t, struct uio *)); 1451 extern int iplwrite __P((dev_t, struct uio *)); 1452 # endif 1453 # endif /* BSD >= 199306 */ 1454 # endif /* __ sgi */ 1455 # endif /* MENTAT */ 1456 1457 #endif /* #ifndef _KERNEL */ 1458 1459 extern char *memstr __P((char *, char *, int, int)); 1460 extern int count4bits __P((u_32_t)); 1461 extern int count6bits __P((u_32_t *)); 1462 extern int frrequest __P((int, ioctlcmd_t, caddr_t, int, int, ipf_stack_t *)); 1463 extern char *getifname __P((struct ifnet *)); 1464 extern int iplattach __P((ipf_stack_t *)); 1465 extern int ipldetach __P((ipf_stack_t *)); 1466 extern u_short ipf_cksum __P((u_short *, int)); 1467 extern int copyinptr __P((void *, void *, size_t)); 1468 extern int copyoutptr __P((void *, void *, size_t)); 1469 extern int fr_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *)); 1470 extern int fr_inobj __P((void *, void *, int)); 1471 extern int fr_inobjsz __P((void *, void *, int, int)); 1472 extern int fr_ioctlswitch __P((int, void *, ioctlcmd_t, int, int, void *, 1473 ipf_stack_t *)); 1474 extern int fr_ipftune __P((ioctlcmd_t, void *, ipf_stack_t *)); 1475 extern int fr_outobj __P((void *, void *, int)); 1476 extern int fr_outobjsz __P((void *, void *, int, int)); 1477 extern void *fr_pullup __P((mb_t *, fr_info_t *, int)); 1478 extern void fr_resolvedest __P((struct frdest *, int, ipf_stack_t *)); 1479 extern int fr_resolvefunc __P((void *)); 1480 extern void *fr_resolvenic __P((char *, int, ipf_stack_t *)); 1481 extern int fr_send_icmp_err __P((int, fr_info_t *, int)); 1482 extern int fr_send_reset __P((fr_info_t *)); 1483 #if (__FreeBSD_version < 490000) || !defined(_KERNEL) 1484 extern int ppsratecheck __P((struct timeval *, int *, int)); 1485 #endif 1486 extern ipftq_t *fr_addtimeoutqueue __P((ipftq_t **, u_int, ipf_stack_t *)); 1487 extern void fr_deletequeueentry __P((ipftqent_t *)); 1488 extern int fr_deletetimeoutqueue __P((ipftq_t *)); 1489 extern void fr_freetimeoutqueue __P((ipftq_t *, ipf_stack_t *)); 1490 extern void fr_movequeue __P((ipftqent_t *, ipftq_t *, ipftq_t *, 1491 ipf_stack_t *)); 1492 extern void fr_queueappend __P((ipftqent_t *, ipftq_t *, void *, 1493 ipf_stack_t *)); 1494 extern void fr_queueback __P((ipftqent_t *, ipf_stack_t *)); 1495 extern void fr_queuefront __P((ipftqent_t *)); 1496 extern void fr_checkv4sum __P((fr_info_t *)); 1497 extern int fr_checkl4sum __P((fr_info_t *)); 1498 extern int fr_ifpfillv4addr __P((int, struct sockaddr_in *, 1499 struct sockaddr_in *, struct in_addr *, 1500 struct in_addr *)); 1501 extern int fr_coalesce __P((fr_info_t *)); 1502 #ifdef USE_INET6 1503 extern void fr_checkv6sum __P((fr_info_t *)); 1504 extern int fr_ifpfillv6addr __P((int, struct sockaddr_in6 *, 1505 struct sockaddr_in6 *, struct in_addr *, 1506 struct in_addr *)); 1507 #endif 1508 1509 #define IPFILTER_COMPAT 1510 extern int fr_incomptrans __P((ipfobj_t *, void *)); 1511 extern int fr_outcomptrans __P((ipfobj_t *, void *)); 1512 1513 extern int fr_addipftune __P((ipftuneable_t *, ipf_stack_t *)); 1514 extern int fr_delipftune __P((ipftuneable_t *, ipf_stack_t *)); 1515 1516 extern int frflush __P((minor_t, int, int, ipf_stack_t *)); 1517 extern void frsync __P((int, int, void *, char *, ipf_stack_t *)); 1518 #if SOLARIS2 >= 10 1519 extern void fr_ifindexsync __P((void *, void *, ipf_stack_t *)); 1520 #endif 1521 extern frgroup_t *fr_addgroup __P((char *, void *, u_32_t, minor_t, int, 1522 ipf_stack_t *)); 1523 extern int fr_derefrule __P((frentry_t **, ipf_stack_t *)); 1524 extern void fr_delgroup __P((char *, minor_t, int, ipf_stack_t *)); 1525 extern frgroup_t *fr_findgroup __P((char *, minor_t, int, frgroup_t ***, 1526 ipf_stack_t *)); 1527 1528 extern int fr_loginit __P((ipf_stack_t *)); 1529 extern int ipflog_clear __P((minor_t, ipf_stack_t *)); 1530 extern int ipflog_read __P((minor_t, struct uio *, ipf_stack_t *)); 1531 extern int ipflog __P((fr_info_t *, u_int)); 1532 extern int ipllog __P((int, fr_info_t *, void **, size_t *, int *, int, 1533 ipf_stack_t *)); 1534 extern void fr_logunload __P((ipf_stack_t *)); 1535 1536 extern frentry_t *fr_acctpkt __P((fr_info_t *, u_32_t *)); 1537 extern int fr_copytolog __P((int, char *, int)); 1538 extern u_short fr_cksum __P((mb_t *, ip_t *, int, void *)); 1539 extern void fr_deinitialise __P((ipf_stack_t *)); 1540 extern frentry_t *fr_dolog __P((fr_info_t *, u_32_t *)); 1541 extern frentry_t *fr_dstgrpmap __P((fr_info_t *, u_32_t *)); 1542 extern void fr_fixskip __P((frentry_t **, frentry_t *, int)); 1543 extern void fr_forgetifp __P((void *, ipf_stack_t *)); 1544 extern frentry_t *fr_getrulen __P((int, char *, u_32_t, 1545 ipf_stack_t *)); 1546 extern void fr_getstat __P((struct friostat *, ipf_stack_t *)); 1547 extern int fr_ifpaddr __P((int, int, void *, 1548 struct in_addr *, struct in_addr *, 1549 ipf_stack_t *)); 1550 extern int fr_initialise __P((ipf_stack_t *)); 1551 extern int fr_lock __P((caddr_t, int *)); 1552 extern int fr_makefrip __P((int, ip_t *, fr_info_t *)); 1553 extern int fr_matchtag __P((ipftag_t *, ipftag_t *)); 1554 extern int fr_matchicmpqueryreply __P((int, icmpinfo_t *, 1555 struct icmp *, int)); 1556 extern u_32_t fr_newisn __P((fr_info_t *)); 1557 extern u_short fr_nextipid __P((fr_info_t *)); 1558 extern int fr_rulen __P((int, frentry_t *, ipf_stack_t *)); 1559 extern int fr_scanlist __P((fr_info_t *, u_32_t)); 1560 extern frentry_t *fr_srcgrpmap __P((fr_info_t *, u_32_t *)); 1561 extern int fr_tcpudpchk __P((fr_info_t *, frtuc_t *)); 1562 extern int fr_verifysrc __P((fr_info_t *fin)); 1563 extern int fr_zerostats __P((char *, ipf_stack_t *)); 1564 extern ipftoken_t *ipf_findtoken __P((int, int, void *, ipf_stack_t *)); 1565 extern int ipf_getnextrule __P((ipftoken_t *, void *, 1566 ipf_stack_t *)); 1567 extern void ipf_expiretokens __P((ipf_stack_t *)); 1568 extern void ipf_freetoken __P((ipftoken_t *, ipf_stack_t *)); 1569 extern int ipf_deltoken __P((int, int, void *, ipf_stack_t *)); 1570 extern int ipf_genericiter __P((void *, int, void *, ipf_stack_t *)); 1571 extern int ipf_extraflush __P((int, ipftq_t *, ipftq_t *, ipf_stack_t *)); 1572 extern int ipf_flushclosing __P((int, int, ipftq_t *, ipftq_t *, ipf_stack_t *)); 1573 extern int ipf_earlydrop __P((int, ipftq_t *, int, ipf_stack_t *)); 1574 1575 #ifndef ipf_random 1576 extern u_32_t ipf_random __P((void)); 1577 #endif 1578 1579 extern char ipfilter_version[]; 1580 #ifdef USE_INET6 1581 extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1582 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1583 extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1584 #endif 1585 extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1586 extern frentry_t *ipfrule_match __P((fr_info_t *)); 1587 1588 extern void ipftuneable_alloc(ipf_stack_t *); 1589 extern void ipftuneable_free(ipf_stack_t *); 1590 1591 #endif /* __IP_FIL_H__ */ 1592