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 2008 Sun Microsystems, Inc. All rights reserved. 10 * Use is subject to license terms. 11 */ 12 13 #pragma ident "%Z%%M% %I% %E% SMI" 14 15 #ifndef __IP_FIL_H__ 16 #define __IP_FIL_H__ 17 18 #include "netinet/ip_compat.h" 19 20 #ifndef SOLARIS 21 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 22 #endif 23 24 #ifndef __P 25 # ifdef __STDC__ 26 # define __P(x) x 27 # else 28 # define __P(x) () 29 # endif 30 #endif 31 32 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 33 # define SIOCADAFR _IOW('r', 60, struct ipfobj) 34 # define SIOCRMAFR _IOW('r', 61, struct ipfobj) 35 # define SIOCSETFF _IOW('r', 62, u_int) 36 # define SIOCGETFF _IOR('r', 63, u_int) 37 # define SIOCGETFS _IOWR('r', 64, struct ipfobj) 38 # define SIOCIPFFL _IOWR('r', 65, int) 39 # define SIOCIPFFB _IOR('r', 66, int) 40 # define SIOCADIFR _IOW('r', 67, struct ipfobj) 41 # define SIOCRMIFR _IOW('r', 68, struct ipfobj) 42 # define SIOCSWAPA _IOR('r', 69, u_int) 43 # define SIOCINAFR _IOW('r', 70, struct ipfobj) 44 # define SIOCINIFR _IOW('r', 71, struct ipfobj) 45 # define SIOCFRENB _IOW('r', 72, u_int) 46 # define SIOCFRSYN _IOW('r', 73, u_int) 47 # define SIOCFRZST _IOWR('r', 74, struct ipfobj) 48 # define SIOCZRLST _IOWR('r', 75, struct ipfobj) 49 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 50 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 51 # define SIOCATHST _IOWR('r', 78, struct ipfobj) 52 # define SIOCSTLCK _IOWR('r', 79, u_int) 53 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 54 # define SIOCSTGET _IOWR('r', 81, struct ipfobj) 55 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 56 # define SIOCGFRST _IOWR('r', 83, struct ipfobj) 57 # define SIOCSETLG _IOWR('r', 84, int) 58 # define SIOCGETLG _IOWR('r', 85, int) 59 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 60 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 61 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 62 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 63 # define SIOCIPFL6 _IOWR('r', 90, int) 64 # define SIOCIPFLP _IOWR('r', 91, int) 65 # define SIOCIPFITER _IOWR('r', 92, struct ipfobj) 66 # define SIOCGENITER _IOWR('r', 93, struct ipfobj) 67 # define SIOCGTABL _IOWR('r', 94, struct ipfobj) 68 # define SIOCIPFDELTOK _IOWR('r', 95, int) 69 # define SIOCLOOKUPITER _IOWR('r', 96, struct ipfobj) 70 #else 71 # define SIOCADAFR _IOW(r, 60, struct ipfobj) 72 # define SIOCRMAFR _IOW(r, 61, struct ipfobj) 73 # define SIOCSETFF _IOW(r, 62, u_int) 74 # define SIOCGETFF _IOR(r, 63, u_int) 75 # define SIOCGETFS _IOWR(r, 64, struct ipfobj) 76 # define SIOCIPFFL _IOWR(r, 65, int) 77 # define SIOCIPFFB _IOR(r, 66, int) 78 # define SIOCADIFR _IOW(r, 67, struct ipfobj) 79 # define SIOCRMIFR _IOW(r, 68, struct ipfobj) 80 # define SIOCSWAPA _IOR(r, 69, u_int) 81 # define SIOCINAFR _IOW(r, 70, struct ipfobj) 82 # define SIOCINIFR _IOW(r, 71, struct ipfobj) 83 # define SIOCFRENB _IOW(r, 72, u_int) 84 # define SIOCFRSYN _IOW(r, 73, u_int) 85 # define SIOCFRZST _IOWR(r, 74, struct ipfobj) 86 # define SIOCZRLST _IOWR(r, 75, struct ipfobj) 87 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 88 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 89 # define SIOCATHST _IOWR(r, 78, struct ipfobj) 90 # define SIOCSTLCK _IOWR(r, 79, u_int) 91 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 92 # define SIOCSTGET _IOWR(r, 81, struct ipfobj) 93 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 94 # define SIOCGFRST _IOWR(r, 83, struct ipfobj) 95 # define SIOCSETLG _IOWR(r, 84, int) 96 # define SIOCGETLG _IOWR(r, 85, int) 97 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 98 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 99 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 100 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 101 # define SIOCIPFL6 _IOWR(r, 90, int) 102 # define SIOCIPFLP _IOWR(r, 91, int) 103 # define SIOCIPFITER _IOWR(r, 92, struct ipfobj) 104 # define SIOCGENITER _IOWR(r, 93, struct ipfobj) 105 # define SIOCGTABL _IOWR(r, 94, struct ipfobj) 106 # define SIOCIPFDELTOK _IOWR(r, 95, int) 107 # define SIOCLOOKUPITER _IOWR(r, 96, struct ipfobj) 108 #endif 109 #define SIOCADDFR SIOCADAFR 110 #define SIOCDELFR SIOCRMAFR 111 #define SIOCINSFR SIOCINAFR 112 113 114 struct ipscan; 115 struct ifnet; 116 117 typedef struct ipf_stack ipf_stack_t; 118 119 typedef int (* lookupfunc_t) __P((void *, int, void *, ipf_stack_t *)); 120 121 122 /* 123 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 124 * as other types of objects, depending on its qualifier. 125 */ 126 #ifdef USE_INET6 127 typedef union i6addr { 128 u_32_t i6[4]; 129 struct in_addr in4; 130 struct in6_addr in6; 131 void *vptr[2]; 132 lookupfunc_t lptr[2]; 133 } i6addr_t; 134 #define in6_addr8 in6.s6_addr 135 #else 136 typedef union i6addr { 137 u_32_t i6[4]; 138 struct in_addr in4; 139 void *vptr[2]; 140 lookupfunc_t lptr[2]; 141 } i6addr_t; 142 #endif 143 144 #define in4_addr in4.s_addr 145 #define iplookupnum i6[0] 146 #define iplookuptype i6[1] 147 /* 148 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 149 */ 150 #define iplookupptr vptr[0] 151 #define iplookupfunc lptr[1] 152 153 #define I60(x) (((i6addr_t *)(x))->i6[0]) 154 #define I61(x) (((i6addr_t *)(x))->i6[1]) 155 #define I62(x) (((i6addr_t *)(x))->i6[2]) 156 #define I63(x) (((i6addr_t *)(x))->i6[3]) 157 #define HI60(x) ntohl(((i6addr_t *)(x))->i6[0]) 158 #define HI61(x) ntohl(((i6addr_t *)(x))->i6[1]) 159 #define HI62(x) ntohl(((i6addr_t *)(x))->i6[2]) 160 #define HI63(x) ntohl(((i6addr_t *)(x))->i6[3]) 161 162 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 163 (I61(a) == I61(b)) && (I60(a) == I60(b))) 164 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 165 (I61(a) != I61(b)) || (I60(a) != I60(b))) 166 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 167 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 168 #define IP6_ISONES(a) ((I63(a) == 0xffffffff) && (I62(a) == 0xffffffff) && \ 169 (I61(a) == 0xffffffff) && (I60(a) == 0xffffffff)) 170 #define IP6_GT(a,b) (ntohl(HI60(a)) > ntohl(HI60(b)) || \ 171 (HI60(a) == HI60(b) && \ 172 (ntohl(HI61(a)) > ntohl(HI61(b)) || \ 173 (HI61(a) == HI61(b) && \ 174 (ntohl(HI62(a)) > ntohl(HI62(b)) || \ 175 (HI62(a) == HI62(b) && \ 176 ntohl(HI63(a)) > ntohl(HI63(b)))))))) 177 #define IP6_LT(a,b) (ntohl(HI60(a)) < ntohl(HI60(b)) || \ 178 (HI60(a) == HI60(b) && \ 179 (ntohl(HI61(a)) < ntohl(HI61(b)) || \ 180 (HI61(a) == HI61(b) && \ 181 (ntohl(HI62(a)) < ntohl(HI62(b)) || \ 182 (HI62(a) == HI62(b) && \ 183 ntohl(HI63(a)) < ntohl(HI63(b)))))))) 184 #define NLADD(n,x) htonl(ntohl(n) + (x)) 185 #define IP6_INC(a) \ 186 { i6addr_t *_i6 = (i6addr_t *)(a); \ 187 _i6->i6[3] = NLADD(_i6->i6[3], 1); \ 188 if (_i6->i6[3] == 0) { \ 189 _i6->i6[2] = NLADD(_i6->i6[2], 1); \ 190 if (_i6->i6[2] == 0) { \ 191 _i6->i6[1] = NLADD(_i6->i6[1], 1); \ 192 if (_i6->i6[1] == 0) { \ 193 _i6->i6[0] = NLADD(_i6->i6[0], 1); \ 194 } \ 195 } \ 196 } \ 197 } 198 #define IP6_ADD(a,x,d) \ 199 { i6addr_t *_s = (i6addr_t *)(a); \ 200 i6addr_t *_d = (i6addr_t *)(d); \ 201 _d->i6[3] = NLADD(_s->i6[3], x); \ 202 if (ntohl(_d->i6[3]) < ntohl(_s->i6[3])) { \ 203 _d->i6[2] = NLADD(_d->i6[2], 1); \ 204 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 205 _d->i6[1] = NLADD(_d->i6[1], 1); \ 206 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 207 _d->i6[0] = NLADD(_d->i6[0], 1); \ 208 } \ 209 } \ 210 } \ 211 } 212 #define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \ 213 i6addr_t *_s2 = (i6addr_t *)(b); \ 214 i6addr_t *_d = (i6addr_t *)(d); \ 215 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 216 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 217 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 218 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 219 } 220 #define IP6_MASKEQ(a,m,b) \ 221 (((I60(a) & I60(m)) == I60(b)) && \ 222 ((I61(a) & I61(m)) == I61(b)) && \ 223 ((I62(a) & I62(m)) == I62(b)) && \ 224 ((I63(a) & I63(m)) == I63(b))) 225 #define IP6_MASKNEQ(a,m,b) \ 226 (((I60(a) & I60(m)) != I60(b)) || \ 227 ((I61(a) & I61(m)) != I61(b)) || \ 228 ((I62(a) & I62(m)) != I62(b)) || \ 229 ((I63(a) & I63(m)) != I63(b))) 230 #define IP6_MERGE(a,b,c) \ 231 { i6addr_t *_d, *_s1, *_s2; \ 232 _d = (i6addr_t *)(a); \ 233 _s1 = (i6addr_t *)(b); \ 234 _s2 = (i6addr_t *)(c); \ 235 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 236 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 237 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 238 _d->i6[3] |= _s1->i6[3] & ~_s2->i6[3]; \ 239 } 240 241 242 typedef struct fr_ip { 243 u_32_t fi_v:4; /* IP version */ 244 u_32_t fi_xx:4; /* spare */ 245 u_32_t fi_tos:8; /* IP packet TOS */ 246 u_32_t fi_ttl:8; /* IP packet TTL */ 247 u_32_t fi_p:8; /* IP packet protocol */ 248 u_32_t fi_optmsk; /* bitmask composed from IP options */ 249 i6addr_t fi_src; /* source address from packet */ 250 i6addr_t fi_dst; /* destination address from packet */ 251 u_short fi_secmsk; /* bitmask composed from IP security options */ 252 u_short fi_auth; /* authentication code from IP sec. options */ 253 u_32_t fi_flx; /* packet flags */ 254 u_32_t fi_tcpmsk; /* TCP options set/reset */ 255 u_32_t fi_res1; /* RESERVED */ 256 } fr_ip_t; 257 258 /* 259 * For use in fi_flx 260 */ 261 #define FI_MULTICAST 0x0001 262 #define FI_BROADCAST 0x0002 263 #define FI_FRAG 0x0004 264 #define FI_SHORT 0x0008 265 #define FI_NATED 0x0010 266 #define FI_TCPUDP 0x0020 /* TCP/UCP implied comparison*/ 267 #define FI_OPTIONS 0x0040 268 #define FI_MBCAST 0x0080 269 #define FI_STATE 0x0100 270 #define FI_BADNAT 0x0200 271 #define FI_BAD 0x0400 272 #define FI_OOW 0x0800 /* Out of state window, else match */ 273 #define FI_ICMPERR 0x1000 274 #define FI_FRAGBODY 0x2000 275 #define FI_BADSRC 0x4000 276 #define FI_LOWTTL 0x8000 277 #define FI_CMP 0xcfe3 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL */ 278 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 279 #define FI_WITH 0xeffe /* Not FI_TCPUDP */ 280 #define FI_V6EXTHDR 0x10000 281 #define FI_COALESCE 0x20000 282 #define FI_ICMPQUERY 0x40000 283 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 284 #define FI_DONTCACHE 0x40000000 /* don't cache the result */ 285 #define FI_IGNORE 0x80000000 286 287 #define fi_saddr fi_src.in4.s_addr 288 #define fi_daddr fi_dst.in4.s_addr 289 #define fi_srcnum fi_src.iplookupnum 290 #define fi_dstnum fi_dst.iplookupnum 291 #define fi_srctype fi_src.iplookuptype 292 #define fi_dsttype fi_dst.iplookuptype 293 #define fi_srcptr fi_src.iplookupptr 294 #define fi_dstptr fi_dst.iplookupptr 295 #define fi_srcfunc fi_src.iplookupfunc 296 #define fi_dstfunc fi_dst.iplookupfunc 297 298 299 /* 300 * These are both used by the state and NAT code to indicate that one port or 301 * the other should be treated as a wildcard. 302 * NOTE: When updating, check bit masks in ip_state.h and update there too. 303 */ 304 #define SI_W_SPORT 0x00000100 305 #define SI_W_DPORT 0x00000200 306 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 307 #define SI_W_SADDR 0x00000400 308 #define SI_W_DADDR 0x00000800 309 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 310 #define SI_NEWFR 0x00001000 311 #define SI_CLONE 0x00002000 312 #define SI_CLONED 0x00004000 313 314 315 316 317 typedef struct fr_info { 318 void *fin_ifp; /* interface packet is `on' */ 319 fr_ip_t fin_fi; /* IP Packet summary */ 320 union { 321 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */ 322 u_32_t fid_32; 323 } fin_dat; 324 int fin_out; /* in or out ? 1 == out, 0 == in */ 325 int fin_rev; /* state only: 1 = reverse */ 326 u_short fin_hlen; /* length of IP header in bytes */ 327 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ 328 u_char fin_icode; /* ICMP error to return */ 329 u_32_t fin_rule; /* rule # last matched */ 330 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 331 struct frentry *fin_fr; /* last matching rule */ 332 void *fin_dp; /* start of data past IP header */ 333 int fin_dlen; /* length of data portion of packet */ 334 int fin_plen; 335 int fin_flen; /* length of layer 4 hdr and 336 ipv6 ext hdr after fragment hdr */ 337 int fin_ipoff; /* # bytes from buffer start to hdr */ 338 u_32_t fin_id; /* IP packet id field */ 339 u_short fin_off; 340 int fin_depth; /* Group nesting depth */ 341 int fin_error; /* Error code to return */ 342 void *fin_nat; 343 void *fin_state; 344 void *fin_nattag; 345 union { 346 ip_t *fip_ip; 347 #ifdef USE_INET6 348 ip6_t *fip_ip6; 349 #endif 350 } fin_ipu; 351 mb_t **fin_mp; /* pointer to pointer to mbuf */ 352 mb_t *fin_m; /* pointer to mbuf */ 353 #ifdef MENTAT 354 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 355 void *fin_qpi; 356 ipf_stack_t *fin_ifs; 357 #endif 358 #ifdef __sgi 359 void *fin_hbuf; 360 #endif 361 } fr_info_t; 362 363 #define fin_ip fin_ipu.fip_ip 364 #define fin_ip6 fin_ipu.fip_ip6 365 #define fin_v fin_fi.fi_v 366 #define fin_p fin_fi.fi_p 367 #define fin_flx fin_fi.fi_flx 368 #define fin_optmsk fin_fi.fi_optmsk 369 #define fin_secmsk fin_fi.fi_secmsk 370 #define fin_auth fin_fi.fi_auth 371 #define fin_src fin_fi.fi_src.in4 372 #define fin_saddr fin_fi.fi_saddr 373 #define fin_dst fin_fi.fi_dst.in4 374 #define fin_daddr fin_fi.fi_daddr 375 #define fin_data fin_dat.fid_16 376 #define fin_sport fin_dat.fid_16[0] 377 #define fin_dport fin_dat.fid_16[1] 378 #define fin_ports fin_dat.fid_32 379 380 #ifdef USE_INET6 381 # define fin_src6 fin_fi.fi_src 382 # define fin_dst6 fin_fi.fi_dst 383 # define fin_dstip6 fin_fi.fi_dst.in6 384 # define fin_srcip6 fin_fi.fi_src.in6 385 #endif 386 387 #define IPF_IN 0 388 #define IPF_OUT 1 389 390 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *)); 391 typedef int (*ipfuncinit_t) __P((struct frentry *, 392 ipf_stack_t *)); 393 394 typedef struct ipfunc_resolve { 395 char ipfu_name[32]; 396 ipfunc_t ipfu_addr; 397 ipfuncinit_t ipfu_init; 398 } ipfunc_resolve_t; 399 400 /* 401 * Size for compares on fr_info structures 402 */ 403 #define FI_CSIZE offsetof(fr_info_t, fin_icode) 404 #define FI_LCSIZE offsetof(fr_info_t, fin_dp) 405 406 /* 407 * Size for copying cache fr_info structure 408 */ 409 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 410 411 /* 412 * Structure for holding IPFilter's tag information 413 */ 414 #define IPFTAG_LEN 16 415 typedef struct { 416 union { 417 u_32_t iptu_num[4]; 418 char iptu_tag[IPFTAG_LEN]; 419 } ipt_un; 420 int ipt_not; 421 } ipftag_t; 422 423 #define ipt_tag ipt_un.iptu_tag 424 #define ipt_num ipt_un.iptu_num 425 426 427 /* 428 * This structure is used to hold information about the next hop for where 429 * to forward a packet. 430 */ 431 typedef struct frdest { 432 void *fd_ifp; 433 i6addr_t fd_ip6; 434 char fd_ifname[LIFNAMSIZ]; 435 } frdest_t; 436 437 #define fd_ip fd_ip6.in4 438 439 440 /* 441 * This structure holds information about a port comparison. 442 */ 443 typedef struct frpcmp { 444 int frp_cmp; /* data for port comparisons */ 445 u_short frp_port; /* top port for <> and >< */ 446 u_short frp_top; /* top port for <> and >< */ 447 } frpcmp_t; 448 449 #define FR_NONE 0 450 #define FR_EQUAL 1 451 #define FR_NEQUAL 2 452 #define FR_LESST 3 453 #define FR_GREATERT 4 454 #define FR_LESSTE 5 455 #define FR_GREATERTE 6 456 #define FR_OUTRANGE 7 457 #define FR_INRANGE 8 458 #define FR_INCRANGE 9 459 460 /* 461 * Structure containing all the relevant TCP things that can be checked in 462 * a filter rule. 463 */ 464 typedef struct frtuc { 465 u_char ftu_tcpfm; /* tcp flags mask */ 466 u_char ftu_tcpf; /* tcp flags */ 467 frpcmp_t ftu_src; 468 frpcmp_t ftu_dst; 469 } frtuc_t; 470 471 #define ftu_scmp ftu_src.frp_cmp 472 #define ftu_dcmp ftu_dst.frp_cmp 473 #define ftu_sport ftu_src.frp_port 474 #define ftu_dport ftu_dst.frp_port 475 #define ftu_stop ftu_src.frp_top 476 #define ftu_dtop ftu_dst.frp_top 477 478 #define FR_TCPFMAX 0x3f 479 480 /* 481 * This structure makes up what is considered to be the IPFilter specific 482 * matching components of a filter rule, as opposed to the data structures 483 * used to define the result which are in frentry_t and not here. 484 */ 485 typedef struct fripf { 486 fr_ip_t fri_ip; 487 fr_ip_t fri_mip; /* mask structure */ 488 489 u_short fri_icmpm; /* data for ICMP packets (mask) */ 490 u_short fri_icmp; 491 492 frtuc_t fri_tuc; 493 int fri_satype; /* addres type */ 494 int fri_datype; /* addres type */ 495 int fri_sifpidx; /* doing dynamic addressing */ 496 int fri_difpidx; /* index into fr_ifps[] to use when */ 497 } fripf_t; 498 499 #define fri_dstnum fri_ip.fi_dstnum 500 #define fri_srcnum fri_mip.fi_srcnum 501 #define fri_dstptr fri_ip.fi_dstptr 502 #define fri_srcptr fri_mip.fi_srcptr 503 504 #define FRI_NORMAL 0 /* Normal address */ 505 #define FRI_DYNAMIC 1 /* dynamic address */ 506 #define FRI_LOOKUP 2 /* address is a pool # */ 507 #define FRI_RANGE 3 /* address/mask is a range */ 508 #define FRI_NETWORK 4 /* network address from if */ 509 #define FRI_BROADCAST 5 /* broadcast address from if */ 510 #define FRI_PEERADDR 6 /* Peer address for P-to-P */ 511 #define FRI_NETMASKED 7 /* network address with netmask from if */ 512 513 514 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *)); 515 516 typedef struct frentry { 517 ipfmutex_t fr_lock; 518 struct frentry *fr_next; 519 struct frentry **fr_grp; 520 struct ipscan *fr_isc; 521 void *fr_ifas[4]; 522 void *fr_ptr; /* for use with fr_arg */ 523 char *fr_comment; /* text comment for rule */ 524 int fr_ref; /* reference count - for grouping */ 525 int fr_statecnt; /* state count - for limit rules */ 526 /* 527 * These are only incremented when a packet matches this rule and 528 * it is the last match 529 */ 530 U_QUAD_T fr_hits; 531 U_QUAD_T fr_bytes; 532 533 /* 534 * For PPS rate limiting 535 */ 536 struct timeval fr_lastpkt; 537 int fr_curpps; 538 539 union { 540 void *fru_data; 541 caddr_t fru_caddr; 542 fripf_t *fru_ipf; 543 frentfunc_t fru_func; 544 } fr_dun; 545 546 /* 547 * Fields after this may not change whilst in the kernel. 548 */ 549 ipfunc_t fr_func; /* call this function */ 550 int fr_dsize; 551 int fr_pps; 552 int fr_statemax; /* max reference count */ 553 int fr_flineno; /* line number from conf file */ 554 u_32_t fr_type; 555 u_32_t fr_flags; /* per-rule flags && options (see below) */ 556 u_32_t fr_logtag; /* user defined log tag # */ 557 u_32_t fr_collect; /* collection number */ 558 u_int fr_arg; /* misc. numeric arg for rule */ 559 u_int fr_loglevel; /* syslog log facility + priority */ 560 u_int fr_age[2]; /* non-TCP timeouts */ 561 u_char fr_v; 562 u_char fr_icode; /* return ICMP code */ 563 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */ 564 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */ 565 ipftag_t fr_nattag; 566 char fr_ifnames[4][LIFNAMSIZ]; 567 char fr_isctag[16]; 568 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 569 frdest_t fr_dif; /* duplicate packet interface */ 570 /* 571 * This must be last and will change after loaded into the kernel. 572 */ 573 u_int fr_cksum; /* checksum on filter rules for performance */ 574 } frentry_t; 575 576 #define fr_caddr fr_dun.fru_caddr 577 #define fr_data fr_dun.fru_data 578 #define fr_dfunc fr_dun.fru_func 579 #define fr_ipf fr_dun.fru_ipf 580 #define fr_ip fr_ipf->fri_ip 581 #define fr_mip fr_ipf->fri_mip 582 #define fr_icmpm fr_ipf->fri_icmpm 583 #define fr_icmp fr_ipf->fri_icmp 584 #define fr_tuc fr_ipf->fri_tuc 585 #define fr_satype fr_ipf->fri_satype 586 #define fr_datype fr_ipf->fri_datype 587 #define fr_sifpidx fr_ipf->fri_sifpidx 588 #define fr_difpidx fr_ipf->fri_difpidx 589 #define fr_proto fr_ip.fi_p 590 #define fr_mproto fr_mip.fi_p 591 #define fr_ttl fr_ip.fi_ttl 592 #define fr_mttl fr_mip.fi_ttl 593 #define fr_tos fr_ip.fi_tos 594 #define fr_mtos fr_mip.fi_tos 595 #define fr_tcpfm fr_tuc.ftu_tcpfm 596 #define fr_tcpf fr_tuc.ftu_tcpf 597 #define fr_scmp fr_tuc.ftu_scmp 598 #define fr_dcmp fr_tuc.ftu_dcmp 599 #define fr_dport fr_tuc.ftu_dport 600 #define fr_sport fr_tuc.ftu_sport 601 #define fr_stop fr_tuc.ftu_stop 602 #define fr_dtop fr_tuc.ftu_dtop 603 #define fr_dst fr_ip.fi_dst.in4 604 #define fr_daddr fr_ip.fi_dst.in4.s_addr 605 #define fr_src fr_ip.fi_src.in4 606 #define fr_saddr fr_ip.fi_src.in4.s_addr 607 #define fr_dmsk fr_mip.fi_dst.in4 608 #define fr_dmask fr_mip.fi_dst.in4.s_addr 609 #define fr_smsk fr_mip.fi_src.in4 610 #define fr_smask fr_mip.fi_src.in4.s_addr 611 #define fr_dstnum fr_ip.fi_dstnum 612 #define fr_srcnum fr_ip.fi_srcnum 613 #define fr_dsttype fr_ip.fi_dsttype 614 #define fr_srctype fr_ip.fi_srctype 615 #define fr_dstptr fr_mip.fi_dstptr 616 #define fr_srcptr fr_mip.fi_srcptr 617 #define fr_dstfunc fr_mip.fi_dstfunc 618 #define fr_srcfunc fr_mip.fi_srcfunc 619 #define fr_optbits fr_ip.fi_optmsk 620 #define fr_optmask fr_mip.fi_optmsk 621 #define fr_secbits fr_ip.fi_secmsk 622 #define fr_secmask fr_mip.fi_secmsk 623 #define fr_authbits fr_ip.fi_auth 624 #define fr_authmask fr_mip.fi_auth 625 #define fr_flx fr_ip.fi_flx 626 #define fr_mflx fr_mip.fi_flx 627 #define fr_ifname fr_ifnames[0] 628 #define fr_oifname fr_ifnames[2] 629 #define fr_ifa fr_ifas[0] 630 #define fr_oifa fr_ifas[2] 631 #define fr_tif fr_tifs[0] 632 #define fr_rif fr_tifs[1] 633 634 #define FR_NOLOGTAG 0 635 636 #ifndef offsetof 637 #define offsetof(t,m) (int)((&((t *)0L)->m)) 638 #endif 639 #define FR_CMPSIZ (sizeof(struct frentry) - \ 640 offsetof(struct frentry, fr_func)) 641 642 /* 643 * fr_type 644 */ 645 #define FR_T_NONE 0 646 #define FR_T_IPF 1 /* IPF structures */ 647 #define FR_T_BPFOPC 2 /* BPF opcode */ 648 #define FR_T_CALLFUNC 3 /* callout to function in fr_func only */ 649 #define FR_T_COMPIPF 4 /* compiled C code */ 650 #define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */ 651 652 /* 653 * fr_flags 654 */ 655 #define FR_CALL 0x00000 /* call rule */ 656 #define FR_BLOCK 0x00001 /* do not allow packet to pass */ 657 #define FR_PASS 0x00002 /* allow packet to pass */ 658 #define FR_AUTH 0x00003 /* use authentication */ 659 #define FR_PREAUTH 0x00004 /* require preauthentication */ 660 #define FR_ACCOUNT 0x00005 /* Accounting rule */ 661 #define FR_SKIP 0x00006 /* skip rule */ 662 #define FR_DIVERT 0x00007 /* divert rule */ 663 #define FR_CMDMASK 0x0000f 664 #define FR_LOG 0x00010 /* Log */ 665 #define FR_LOGB 0x00011 /* Log-fail */ 666 #define FR_LOGP 0x00012 /* Log-pass */ 667 #define FR_LOGMASK (FR_LOG|FR_CMDMASK) 668 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 669 #define FR_NOTSRCIP 0x00040 670 #define FR_NOTDSTIP 0x00080 671 #define FR_QUICK 0x00100 /* match & stop processing list */ 672 #define FR_KEEPFRAG 0x00200 /* keep fragment information */ 673 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 674 #define FR_FASTROUTE 0x00800 /* bypass normal routing */ 675 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 676 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 677 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 678 #define FR_OUTQUE 0x04000 /* outgoing packets */ 679 #define FR_INQUE 0x08000 /* ingoing packets */ 680 #define FR_LOGBODY 0x10000 /* Log the body */ 681 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 682 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 683 #define FR_DUP 0x80000 /* duplicate packet */ 684 #define FR_FRSTRICT 0x100000 /* strict frag. cache */ 685 #define FR_STSTRICT 0x200000 /* strict keep state */ 686 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 687 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 688 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 689 #define FR_NOMATCH 0x8000000 /* no match occured */ 690 /* 0x10000000 FF_LOGPASS */ 691 /* 0x20000000 FF_LOGBLOCK */ 692 /* 0x40000000 FF_LOGNOMATCH */ 693 /* 0x80000000 FF_BLOCKNONIP */ 694 #define FR_COPIED 0x40000000 /* copied from user space */ 695 #define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */ 696 697 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 698 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 699 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 700 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 701 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 702 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 703 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 704 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 705 #define FR_INOUT (FR_INQUE|FR_OUTQUE) 706 707 /* 708 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 709 */ 710 #define FF_LOGPASS 0x10000000 711 #define FF_LOGBLOCK 0x20000000 712 #define FF_LOGNOMATCH 0x40000000 713 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 714 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 715 716 717 /* 718 * Structure that passes information on what/how to flush to the kernel. 719 */ 720 typedef struct ipfflush { 721 int ipflu_how; 722 int ipflu_arg; 723 } ipfflush_t; 724 725 726 /* 727 * 728 */ 729 typedef struct ipfgetctl { 730 u_int ipfg_min; /* min value */ 731 u_int ipfg_current; /* current value */ 732 u_int ipfg_max; /* max value */ 733 u_int ipfg_default; /* default value */ 734 u_int ipfg_steps; /* value increments */ 735 char ipfg_name[40]; /* tag name for this control */ 736 } ipfgetctl_t; 737 738 typedef struct ipfsetctl { 739 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 740 u_int ipfs_value; /* min value */ 741 char ipfs_name[40]; /* tag name for this control */ 742 } ipfsetctl_t; 743 744 745 /* 746 * Some of the statistics below are in their own counters, but most are kept 747 * in this single structure so that they can all easily be collected and 748 * copied back as required. 749 * 750 * NOTE: when changing, keep in sync with kstats (below). 751 */ 752 typedef struct filterstats { 753 u_long fr_pass; /* packets allowed */ 754 u_long fr_block; /* packets denied */ 755 u_long fr_nom; /* packets which don't match any rule */ 756 u_long fr_short; /* packets which are short */ 757 u_long fr_ppkl; /* packets allowed and logged */ 758 u_long fr_bpkl; /* packets denied and logged */ 759 u_long fr_npkl; /* packets unmatched and logged */ 760 u_long fr_pkl; /* packets logged */ 761 u_long fr_skip; /* packets to be logged but buffer full */ 762 u_long fr_ret; /* packets for which a return is sent */ 763 u_long fr_acct; /* packets for which counting was performed */ 764 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 765 u_long fr_nfr; /* new fragment state kept */ 766 u_long fr_cfr; /* add new fragment state but complete pkt */ 767 u_long fr_bads; /* bad attempts to allocate packet state */ 768 u_long fr_ads; /* new packet state kept */ 769 u_long fr_chit; /* cached hit */ 770 u_long fr_tcpbad; /* TCP checksum check failures */ 771 u_long fr_pull[2]; /* good and bad pullup attempts */ 772 u_long fr_badsrc; /* source received doesn't match route */ 773 u_long fr_badttl; /* TTL in packet doesn't reach minimum */ 774 u_long fr_bad; /* bad IP packets to the filter */ 775 u_long fr_ipv6; /* IPv6 packets in/out */ 776 u_long fr_ppshit; /* dropped because of pps ceiling */ 777 u_long fr_ipud; /* IP id update failures */ 778 } filterstats_t; 779 780 /* 781 * kstat "copy" of the above - keep in sync! 782 * also keep in sync with initialisation code in solaris.c, ipf_kstat_init(). 783 */ 784 typedef struct filter_kstats { 785 kstat_named_t fks_pass; /* see above for comments */ 786 kstat_named_t fks_block; 787 kstat_named_t fks_nom; 788 kstat_named_t fks_short; 789 kstat_named_t fks_ppkl; 790 kstat_named_t fks_bpkl; 791 kstat_named_t fks_npkl; 792 kstat_named_t fks_pkl; 793 kstat_named_t fks_skip; 794 kstat_named_t fks_ret; 795 kstat_named_t fks_acct; 796 kstat_named_t fks_bnfr; 797 kstat_named_t fks_nfr; 798 kstat_named_t fks_cfr; 799 kstat_named_t fks_bads; 800 kstat_named_t fks_ads; 801 kstat_named_t fks_chit; 802 kstat_named_t fks_tcpbad; 803 kstat_named_t fks_pull[2]; 804 kstat_named_t fks_badsrc; 805 kstat_named_t fks_badttl; 806 kstat_named_t fks_bad; 807 kstat_named_t fks_ipv6; 808 kstat_named_t fks_ppshit; 809 kstat_named_t fks_ipud; 810 } filter_kstats_t; 811 812 /* 813 * Log structure. Each packet header logged is prepended by one of these. 814 * Following this in the log records read from the device will be an ipflog 815 * structure which is then followed by any packet data. 816 */ 817 typedef struct iplog { 818 u_32_t ipl_magic; 819 u_int ipl_count; 820 struct timeval ipl_time; 821 size_t ipl_dsize; 822 struct iplog *ipl_next; 823 } iplog_t; 824 825 #define ipl_sec ipl_time.tv_sec 826 #define ipl_usec ipl_time.tv_usec 827 828 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 829 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 830 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 831 #define IPLOG_SIZE sizeof(iplog_t) 832 833 typedef struct ipflog { 834 #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 835 (defined(OpenBSD) && (OpenBSD >= 199603)) 836 #else 837 u_int fl_unit; 838 #endif 839 u_32_t fl_rule; 840 u_32_t fl_flags; 841 u_32_t fl_lflags; 842 u_32_t fl_logtag; 843 ipftag_t fl_nattag; 844 u_short fl_plen; /* extra data after hlen */ 845 u_short fl_loglevel; /* syslog log level */ 846 char fl_group[FR_GROUPLEN]; 847 u_char fl_hlen; /* length of IP headers saved */ 848 u_char fl_dir; 849 u_char fl_xxx[2]; /* pad */ 850 char fl_ifname[LIFNAMSIZ]; 851 } ipflog_t; 852 853 #ifndef IPF_LOGGING 854 # define IPF_LOGGING 0 855 #endif 856 #ifndef IPF_DEFAULT_PASS 857 # define IPF_DEFAULT_PASS FR_PASS 858 #endif 859 860 #define DEFAULT_IPFLOGSIZE 8192 861 #ifndef IPFILTER_LOGSIZE 862 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 863 #else 864 # if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE 865 # error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE 866 # endif 867 #endif 868 869 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 870 871 /* 872 * Device filenames for reading log information. Use ipf on Solaris2 because 873 * ipl is already a name used by something else. 874 */ 875 #ifndef IPL_NAME 876 # if SOLARIS 877 # define IPL_NAME "/dev/ipf" 878 # else 879 # define IPL_NAME "/dev/ipl" 880 # endif 881 #endif 882 /* 883 * Pathnames for various IP Filter control devices. Used by LKM 884 * and userland, so defined here. 885 */ 886 #define IPNAT_NAME "/dev/ipnat" 887 #define IPSTATE_NAME "/dev/ipstate" 888 #define IPAUTH_NAME "/dev/ipauth" 889 #define IPSYNC_NAME "/dev/ipsync" 890 #define IPSCAN_NAME "/dev/ipscan" 891 #define IPLOOKUP_NAME "/dev/iplookup" 892 893 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 894 #define IPL_LOGNAT 1 895 #define IPL_LOGSTATE 2 896 #define IPL_LOGAUTH 3 897 #define IPL_LOGSYNC 4 898 #define IPL_LOGSCAN 5 899 #define IPL_LOGLOOKUP 6 900 #define IPL_LOGCOUNT 7 901 #define IPL_LOGMAX 7 902 #define IPL_LOGSIZE (IPL_LOGMAX + 1) 903 #define IPL_LOGALL -1 904 #define IPL_LOGNONE -2 905 906 /* 907 * For SIOCGETFS 908 */ 909 typedef struct friostat { 910 struct filterstats f_st[2]; 911 struct frentry *f_ipf[2][2]; 912 struct frentry *f_acct[2][2]; 913 struct frentry *f_ipf6[2][2]; 914 struct frentry *f_acct6[2][2]; 915 struct frentry *f_auth; 916 struct frgroup *f_groups[IPL_LOGSIZE][2]; 917 u_long f_froute[2]; 918 u_long f_ticks; 919 int f_locks[IPL_LOGMAX]; 920 size_t f_kmutex_sz; 921 size_t f_krwlock_sz; 922 int f_defpass; /* default pass - from fr_pass */ 923 int f_active; /* 1 or 0 - active rule set */ 924 int f_running; /* 1 if running, else 0 */ 925 int f_logging; /* 1 if enabled, else 0 */ 926 int f_features; 927 char f_version[32]; /* version string */ 928 } friostat_t; 929 930 #define f_fin f_ipf[0] 931 #define f_fin6 f_ipf6[0] 932 #define f_fout f_ipf[1] 933 #define f_fout6 f_ipf6[1] 934 #define f_acctin f_acct[0] 935 #define f_acctin6 f_acct6[0] 936 #define f_acctout f_acct[1] 937 #define f_acctout6 f_acct6[1] 938 939 #define IPF_FEAT_LKM 0x001 940 #define IPF_FEAT_LOG 0x002 941 #define IPF_FEAT_LOOKUP 0x004 942 #define IPF_FEAT_BPF 0x008 943 #define IPF_FEAT_COMPILED 0x010 944 #define IPF_FEAT_CKSUM 0x020 945 #define IPF_FEAT_SYNC 0x040 946 #define IPF_FEAT_SCAN 0x080 947 #define IPF_FEAT_IPV6 0x100 948 949 typedef struct optlist { 950 u_short ol_val; 951 int ol_bit; 952 } optlist_t; 953 954 955 /* 956 * Group list structure. 957 */ 958 typedef struct frgroup { 959 struct frgroup *fg_next; 960 struct frentry *fg_head; 961 struct frentry *fg_start; 962 u_32_t fg_flags; 963 int fg_ref; 964 char fg_name[FR_GROUPLEN]; 965 } frgroup_t; 966 967 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 968 969 970 /* 971 * Used by state and NAT tables 972 */ 973 typedef struct icmpinfo { 974 u_short ici_id; 975 u_short ici_seq; 976 u_char ici_type; 977 } icmpinfo_t; 978 979 typedef struct udpinfo { 980 u_short us_sport; 981 u_short us_dport; 982 } udpinfo_t; 983 984 985 typedef struct tcpdata { 986 u_32_t td_end; 987 u_32_t td_maxend; 988 u_32_t td_maxwin; 989 u_32_t td_winscale; 990 u_32_t td_maxseg; 991 int td_winflags; 992 } tcpdata_t; 993 994 #define TCP_WSCALE_MAX 14 995 996 #define TCP_WSCALE_SEEN 0x00000001 997 #define TCP_WSCALE_FIRST 0x00000002 998 #define TCP_SACK_PERMIT 0x00000004 999 1000 1001 typedef struct tcpinfo { 1002 u_short ts_sport; 1003 u_short ts_dport; 1004 tcpdata_t ts_data[2]; 1005 } tcpinfo_t; 1006 1007 1008 /* 1009 * Structures to define a GRE header as seen in a packet. 1010 */ 1011 struct grebits { 1012 u_32_t grb_C:1; 1013 u_32_t grb_R:1; 1014 u_32_t grb_K:1; 1015 u_32_t grb_S:1; 1016 u_32_t grb_s:1; 1017 u_32_t grb_recur:1; 1018 u_32_t grb_A:1; 1019 u_32_t grb_flags:3; 1020 u_32_t grb_ver:3; 1021 u_short grb_ptype; 1022 }; 1023 1024 typedef struct grehdr { 1025 union { 1026 struct grebits gru_bits; 1027 u_short gru_flags; 1028 } gr_un; 1029 u_short gr_len; 1030 u_short gr_call; 1031 } grehdr_t; 1032 1033 #define gr_flags gr_un.gru_flags 1034 #define gr_bits gr_un.gru_bits 1035 #define gr_ptype gr_bits.grb_ptype 1036 #define gr_C gr_bits.grb_C 1037 #define gr_R gr_bits.grb_R 1038 #define gr_K gr_bits.grb_K 1039 #define gr_S gr_bits.grb_S 1040 #define gr_s gr_bits.grb_s 1041 #define gr_recur gr_bits.grb_recur 1042 #define gr_A gr_bits.grb_A 1043 #define gr_ver gr_bits.grb_ver 1044 1045 /* 1046 * GRE information tracked by "keep state" 1047 */ 1048 typedef struct greinfo { 1049 u_short gs_call[2]; 1050 u_short gs_flags; 1051 u_short gs_ptype; 1052 } greinfo_t; 1053 1054 #define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1055 1056 1057 /* 1058 * Format of an Authentication header 1059 */ 1060 typedef struct authhdr { 1061 u_char ah_next; 1062 u_char ah_plen; 1063 u_short ah_reserved; 1064 u_32_t ah_spi; 1065 u_32_t ah_seq; 1066 /* Following the sequence number field is 0 or more bytes of */ 1067 /* authentication data, as specified by ah_plen - RFC 2402. */ 1068 } authhdr_t; 1069 1070 1071 /* 1072 * Timeout tail queue list member 1073 */ 1074 typedef struct ipftqent { 1075 struct ipftqent **tqe_pnext; 1076 struct ipftqent *tqe_next; 1077 struct ipftq *tqe_ifq; 1078 void *tqe_parent; /* pointer back to NAT/state struct */ 1079 u_long tqe_die; /* when this entriy is to die */ 1080 u_long tqe_touched; 1081 int tqe_flags; 1082 int tqe_state[2]; /* current state of this entry */ 1083 } ipftqent_t; 1084 1085 #define TQE_RULEBASED 0x00000001 1086 1087 1088 /* 1089 * Timeout tail queue head for IPFilter 1090 */ 1091 typedef struct ipftq { 1092 ipfmutex_t ifq_lock; 1093 u_int ifq_ttl; 1094 ipftqent_t *ifq_head; 1095 ipftqent_t **ifq_tail; 1096 struct ipftq *ifq_next; 1097 struct ipftq **ifq_pnext; 1098 int ifq_ref; 1099 u_int ifq_flags; 1100 } ipftq_t; 1101 1102 #define IFQF_USER 0x01 /* User defined aging */ 1103 #define IFQF_DELETE 0x02 /* Marked for deletion */ 1104 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1105 1106 #define IPF_HZ_MULT 1 1107 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1108 /* checks its timeout queues. */ 1109 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1110 1111 /* 1112 * Structure to define address for pool lookups. 1113 */ 1114 typedef struct { 1115 u_char adf_len; 1116 sa_family_t adf_family; 1117 i6addr_t adf_addr; 1118 } addrfamily_t; 1119 1120 1121 /* 1122 * Object structure description. For passing through in ioctls. 1123 */ 1124 typedef struct ipfobj { 1125 u_32_t ipfo_rev; /* IPFilter version number */ 1126 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1127 void *ipfo_ptr; /* pointer to object */ 1128 int ipfo_type; /* type of object being pointed to */ 1129 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1130 u_char ipfo_xxxpad[32]; /* reserved for future use */ 1131 } ipfobj_t; 1132 1133 #define IPFOBJ_FRENTRY 0 /* struct frentry */ 1134 #define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1135 #define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1136 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1137 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1138 #define IPFOBJ_IPNAT 5 /* struct ipnat */ 1139 #define IPFOBJ_NATSTAT 6 /* struct natstat */ 1140 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1141 #define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1142 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1143 #define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1144 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1145 #define IPFOBJ_FRAUTH 12 /* struct frauth */ 1146 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1147 #define IPFOBJ_NAT 14 /* struct nat */ 1148 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1149 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1150 #define IPFOBJ_GTABLE 17 /* struct ipftable */ 1151 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1152 #define IPFOBJ_COUNT 19 /* How many #defines are above this? */ 1153 1154 1155 typedef union ipftunevalptr { 1156 void *ipftp_void; 1157 u_long *ipftp_long; 1158 u_int *ipftp_int; 1159 u_short *ipftp_short; 1160 u_char *ipftp_char; 1161 } ipftunevalptr_t; 1162 1163 typedef struct ipftuneable { 1164 ipftunevalptr_t ipft_una; 1165 char *ipft_name; 1166 u_long ipft_min; 1167 u_long ipft_max; 1168 int ipft_sz; 1169 int ipft_flags; 1170 struct ipftuneable *ipft_next; 1171 } ipftuneable_t; 1172 1173 #define ipft_addr ipft_una.ipftp_void 1174 #define ipft_plong ipft_una.ipftp_long 1175 #define ipft_pint ipft_una.ipftp_int 1176 #define ipft_pshort ipft_una.ipftp_short 1177 #define ipft_pchar ipft_una.ipftp_char 1178 1179 #define IPFT_RDONLY 1 /* read-only */ 1180 #define IPFT_WRDISABLED 2 /* write when disabled only */ 1181 1182 typedef union ipftuneval { 1183 u_long ipftu_long; 1184 u_int ipftu_int; 1185 u_short ipftu_short; 1186 u_char ipftu_char; 1187 } ipftuneval_t; 1188 1189 typedef struct ipftune { 1190 void *ipft_cookie; 1191 ipftuneval_t ipft_un; 1192 u_long ipft_min; 1193 u_long ipft_max; 1194 int ipft_sz; 1195 int ipft_flags; 1196 char ipft_name[80]; 1197 } ipftune_t; 1198 1199 #define ipft_vlong ipft_un.ipftu_long 1200 #define ipft_vint ipft_un.ipftu_int 1201 #define ipft_vshort ipft_un.ipftu_short 1202 #define ipft_vchar ipft_un.ipftu_char 1203 1204 /* 1205 * ipfruleiter is iterator structure used for filter rules. 1206 */ 1207 typedef struct ipfruleiter { 1208 int iri_ver; 1209 int iri_inout; 1210 char iri_group[FR_GROUPLEN]; 1211 int iri_active; 1212 int iri_nrules; 1213 frentry_t *iri_rule; 1214 } ipfruleiter_t; 1215 1216 /* Values for iri_inout */ 1217 #define F_IN 0 1218 #define F_OUT 1 1219 #define F_ACIN 2 1220 #define F_ACOUT 3 1221 1222 /* 1223 * ipfgeniter is generic iterator structure used for nat rules, 1224 * hostmap entries and nat table entries. 1225 */ 1226 typedef struct ipfgeniter { 1227 int igi_type; /* type of data we're looking at */ 1228 int igi_nitems; 1229 void *igi_data; 1230 } ipfgeniter_t; 1231 1232 #define IPFGENITER_IPF 0 1233 #define IPFGENITER_NAT 1 1234 #define IPFGENITER_IPNAT 2 1235 #define IPFGENITER_FRAG 3 1236 #define IPFGENITER_AUTH 4 1237 #define IPFGENITER_STATE 5 1238 #define IPFGENITER_NATFRAG 6 1239 #define IPFGENITER_HOSTMAP 7 1240 #define IPFGENITER_LOOKUP 8 1241 1242 typedef struct ipftable { 1243 int ita_type; 1244 void *ita_table; 1245 } ipftable_t; 1246 1247 typedef struct ipftoken { 1248 struct ipftoken *ipt_next; 1249 struct ipftoken **ipt_pnext; 1250 void *ipt_ctx; 1251 void *ipt_data; 1252 u_long ipt_die; 1253 int ipt_type; 1254 int ipt_uid; 1255 int ipt_subtype; 1256 int ipt_alive; 1257 } ipftoken_t; 1258 1259 1260 /* 1261 * sync commands 1262 */ 1263 #define IPFSYNC_RESYNC 0 1264 #define IPFSYNC_NEWIFP 1 1265 #define IPFSYNC_OLDIFP 2 1266 1267 1268 /* 1269 ** HPUX Port 1270 */ 1271 #ifdef __hpux 1272 /* HP-UX locking sequence deadlock detection module lock MAJOR ID */ 1273 # define IPF_SMAJ 0 /* temp assignment XXX, not critical */ 1274 #endif 1275 1276 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1277 (__FreeBSD_version >= 220000) 1278 # define CDEV_MAJOR 79 1279 #endif 1280 1281 /* 1282 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns 1283 * on those hooks. We don't need any special mods in non-IP Filter code 1284 * with this! 1285 */ 1286 #if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \ 1287 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \ 1288 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043)) 1289 # if (NetBSD >= 199905) 1290 # define PFIL_HOOKS 1291 # endif 1292 # ifdef PFIL_HOOKS 1293 # define NETBSD_PF 1294 # endif 1295 #endif 1296 1297 #ifndef _KERNEL 1298 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1299 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1300 extern int ipf_log __P((void)); 1301 extern struct ifnet *get_unit __P((char *, int, ipf_stack_t *)); 1302 extern char *get_ifname __P((struct ifnet *)); 1303 # if defined(__NetBSD__) || defined(__OpenBSD__) || \ 1304 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) 1305 extern int frrequest __P((int, u_long, caddr_t, int, int, ipf_stack_t *)); 1306 # else 1307 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int)); 1308 # endif 1309 extern int iplopen __P((dev_t, int)); 1310 extern int iplclose __P((dev_t, int)); 1311 extern void m_freem __P((mb_t *)); 1312 #else /* #ifndef _KERNEL */ 1313 extern phy_if_t get_unit __P((char *, int, ipf_stack_t *)); 1314 # if defined(__NetBSD__) && defined(PFIL_HOOKS) 1315 extern void ipfilterattach __P((int)); 1316 # endif 1317 extern int ipl_enable __P((void)); 1318 extern int ipl_disable __P((void)); 1319 # ifdef MENTAT 1320 extern int fr_check __P((struct ip *, int, void *, int, void *, 1321 mblk_t **, ipf_stack_t *)); 1322 # if SOLARIS 1323 # if SOLARIS2 >= 7 1324 extern int iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *)); 1325 # else 1326 extern int iplioctl __P((dev_t, int, int *, int, cred_t *, int *)); 1327 # endif 1328 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1329 extern int iplclose __P((dev_t, int, int, cred_t *)); 1330 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1331 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1332 # endif 1333 # ifdef __hpux 1334 extern int iplopen __P((dev_t, int, intptr_t, int)); 1335 extern int iplclose __P((dev_t, int, int)); 1336 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1337 extern int iplread __P((dev_t, uio_t *)); 1338 extern int iplwrite __P((dev_t, uio_t *)); 1339 extern int iplselect __P((dev_t, int)); 1340 # endif 1341 extern int ipfsync __P((ipf_stack_t *)); 1342 extern int fr_qout __P((queue_t *, mblk_t *)); 1343 # else /* MENTAT */ 1344 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1345 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1346 extern size_t mbufchainlen __P((mb_t *)); 1347 # ifdef __sgi 1348 # include <sys/cred.h> 1349 extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *)); 1350 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1351 extern int iplclose __P((dev_t, int, int, cred_t *)); 1352 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1353 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1354 extern int ipfsync __P((ipf_stack_t *)); 1355 extern int ipfilter_sgi_attach __P((void)); 1356 extern void ipfilter_sgi_detach __P((void)); 1357 extern void ipfilter_sgi_intfsync __P((void)); 1358 # else 1359 # ifdef IPFILTER_LKM 1360 extern int iplidentify __P((char *)); 1361 # endif 1362 # if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \ 1363 (NetBSD >= 199511) || defined(__OpenBSD__) 1364 # if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \ 1365 defined(__OpenBSD__) || (__FreeBSD_version >= 300000) 1366 # if (__FreeBSD_version >= 500024) 1367 # if (__FreeBSD_version >= 502116) 1368 extern int iplioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *)); 1369 # else 1370 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct thread *)); 1371 # endif /* __FreeBSD_version >= 502116 */ 1372 # else 1373 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 1374 # endif /* __FreeBSD_version >= 500024 */ 1375 # else 1376 extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *)); 1377 # endif 1378 # if (__FreeBSD_version >= 500024) 1379 # if (__FreeBSD_version >= 502116) 1380 extern int iplopen __P((struct cdev*, int, int, struct thread *)); 1381 extern int iplclose __P((struct cdev*, int, int, struct thread *)); 1382 # else 1383 extern int iplopen __P((dev_t, int, int, struct thread *)); 1384 extern int iplclose __P((dev_t, int, int, struct thread *)); 1385 # endif /* __FreeBSD_version >= 502116 */ 1386 # else 1387 extern int iplopen __P((dev_t, int, int, struct proc *)); 1388 extern int iplclose __P((dev_t, int, int, struct proc *)); 1389 # endif /* __FreeBSD_version >= 500024 */ 1390 # else 1391 # ifdef linux 1392 extern int iplioctl __P((struct inode *, struct file *, u_int, u_long)); 1393 # else 1394 extern int iplopen __P((dev_t, int)); 1395 extern int iplclose __P((dev_t, int)); 1396 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1397 # endif 1398 # endif /* (_BSDI_VERSION >= 199510) */ 1399 # if BSD >= 199306 1400 # if (__FreeBSD_version >= 502116) 1401 extern int iplread __P((struct cdev*, struct uio *, int)); 1402 extern int iplwrite __P((struct cdev*, struct uio *, int)); 1403 # else 1404 extern int iplread __P((dev_t, struct uio *, int)); 1405 extern int iplwrite __P((dev_t, struct uio *, int)); 1406 # endif /* __FreeBSD_version >= 502116 */ 1407 # else 1408 # ifndef linux 1409 extern int iplread __P((dev_t, struct uio *)); 1410 extern int iplwrite __P((dev_t, struct uio *)); 1411 # endif 1412 # endif /* BSD >= 199306 */ 1413 # endif /* __ sgi */ 1414 # endif /* MENTAT */ 1415 1416 #endif /* #ifndef _KERNEL */ 1417 1418 extern char *memstr __P((char *, char *, int, int)); 1419 extern int count4bits __P((u_32_t)); 1420 extern int count6bits __P((u_32_t *)); 1421 extern int frrequest __P((int, ioctlcmd_t, caddr_t, int, int, ipf_stack_t *)); 1422 extern char *getifname __P((struct ifnet *)); 1423 extern int iplattach __P((ipf_stack_t *, netstack_t *)); 1424 extern int ipldetach __P((ipf_stack_t *)); 1425 extern u_short ipf_cksum __P((u_short *, int)); 1426 extern int copyinptr __P((void *, void *, size_t)); 1427 extern int copyoutptr __P((void *, void *, size_t)); 1428 extern int fr_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *)); 1429 extern int fr_inobj __P((void *, void *, int)); 1430 extern int fr_inobjsz __P((void *, void *, int, int)); 1431 extern int fr_ioctlswitch __P((int, void *, ioctlcmd_t, int, int, void *, 1432 ipf_stack_t *)); 1433 extern int fr_ipftune __P((ioctlcmd_t, void *, ipf_stack_t *)); 1434 extern int fr_outobj __P((void *, void *, int)); 1435 extern int fr_outobjsz __P((void *, void *, int, int)); 1436 extern void *fr_pullup __P((mb_t *, fr_info_t *, int)); 1437 extern void fr_resolvedest __P((struct frdest *, int, ipf_stack_t *)); 1438 extern int fr_resolvefunc __P((void *)); 1439 extern void *fr_resolvenic __P((char *, int, ipf_stack_t *)); 1440 extern int fr_send_icmp_err __P((int, fr_info_t *, int)); 1441 extern int fr_send_reset __P((fr_info_t *)); 1442 #if (__FreeBSD_version < 490000) || !defined(_KERNEL) 1443 extern int ppsratecheck __P((struct timeval *, int *, int)); 1444 #endif 1445 extern ipftq_t *fr_addtimeoutqueue __P((ipftq_t **, u_int, ipf_stack_t *)); 1446 extern void fr_deletequeueentry __P((ipftqent_t *)); 1447 extern int fr_deletetimeoutqueue __P((ipftq_t *)); 1448 extern void fr_freetimeoutqueue __P((ipftq_t *, ipf_stack_t *)); 1449 extern void fr_movequeue __P((ipftqent_t *, ipftq_t *, ipftq_t *, 1450 ipf_stack_t *)); 1451 extern void fr_queueappend __P((ipftqent_t *, ipftq_t *, void *, 1452 ipf_stack_t *)); 1453 extern void fr_queueback __P((ipftqent_t *, ipf_stack_t *)); 1454 extern void fr_queuefront __P((ipftqent_t *)); 1455 extern void fr_checkv4sum __P((fr_info_t *)); 1456 extern int fr_checkl4sum __P((fr_info_t *)); 1457 extern int fr_ifpfillv4addr __P((int, struct sockaddr_in *, 1458 struct sockaddr_in *, struct in_addr *, 1459 struct in_addr *)); 1460 extern int fr_coalesce __P((fr_info_t *)); 1461 #ifdef USE_INET6 1462 extern void fr_checkv6sum __P((fr_info_t *)); 1463 extern int fr_ifpfillv6addr __P((int, struct sockaddr_in6 *, 1464 struct sockaddr_in6 *, struct in_addr *, 1465 struct in_addr *)); 1466 #endif 1467 1468 #define IPFILTER_COMPAT 1469 extern int fr_incomptrans __P((ipfobj_t *, void *)); 1470 extern int fr_outcomptrans __P((ipfobj_t *, void *)); 1471 1472 extern int fr_addipftune __P((ipftuneable_t *, ipf_stack_t *)); 1473 extern int fr_delipftune __P((ipftuneable_t *, ipf_stack_t *)); 1474 1475 extern int frflush __P((minor_t, int, int, ipf_stack_t *)); 1476 extern void frsync __P((int, int, void *, char *, ipf_stack_t *)); 1477 extern frgroup_t *fr_addgroup __P((char *, void *, u_32_t, minor_t, int, 1478 ipf_stack_t *)); 1479 extern int fr_derefrule __P((frentry_t **, ipf_stack_t *)); 1480 extern void fr_delgroup __P((char *, minor_t, int, ipf_stack_t *)); 1481 extern frgroup_t *fr_findgroup __P((char *, minor_t, int, frgroup_t ***, 1482 ipf_stack_t *)); 1483 1484 extern int fr_loginit __P((ipf_stack_t *)); 1485 extern int ipflog_clear __P((minor_t, ipf_stack_t *)); 1486 extern int ipflog_read __P((minor_t, struct uio *, ipf_stack_t *)); 1487 extern int ipflog __P((fr_info_t *, u_int)); 1488 extern int ipllog __P((int, fr_info_t *, void **, size_t *, int *, int, 1489 ipf_stack_t *)); 1490 extern void fr_logunload __P((ipf_stack_t *)); 1491 1492 extern frentry_t *fr_acctpkt __P((fr_info_t *, u_32_t *)); 1493 extern int fr_copytolog __P((int, char *, int)); 1494 extern u_short fr_cksum __P((mb_t *, ip_t *, int, void *)); 1495 extern void fr_deinitialise __P((ipf_stack_t *)); 1496 extern frentry_t *fr_dolog __P((fr_info_t *, u_32_t *)); 1497 extern frentry_t *fr_dstgrpmap __P((fr_info_t *, u_32_t *)); 1498 extern void fr_fixskip __P((frentry_t **, frentry_t *, int)); 1499 extern void fr_forgetifp __P((void *, ipf_stack_t *)); 1500 extern frentry_t *fr_getrulen __P((int, char *, u_32_t, 1501 ipf_stack_t *)); 1502 extern void fr_getstat __P((struct friostat *, ipf_stack_t *)); 1503 extern int fr_ifpaddr __P((int, int, void *, 1504 struct in_addr *, struct in_addr *, 1505 ipf_stack_t *)); 1506 extern int fr_initialise __P((ipf_stack_t *)); 1507 extern void fr_lock __P((caddr_t, int *)); 1508 extern int fr_makefrip __P((int, ip_t *, fr_info_t *)); 1509 extern int fr_matchtag __P((ipftag_t *, ipftag_t *)); 1510 extern int fr_matchicmpqueryreply __P((int, icmpinfo_t *, 1511 struct icmp *, int)); 1512 extern u_32_t fr_newisn __P((fr_info_t *)); 1513 extern u_short fr_nextipid __P((fr_info_t *)); 1514 extern int fr_rulen __P((int, frentry_t *, ipf_stack_t *)); 1515 extern int fr_scanlist __P((fr_info_t *, u_32_t)); 1516 extern frentry_t *fr_srcgrpmap __P((fr_info_t *, u_32_t *)); 1517 extern int fr_tcpudpchk __P((fr_info_t *, frtuc_t *)); 1518 extern int fr_verifysrc __P((fr_info_t *fin)); 1519 extern int fr_zerostats __P((char *, ipf_stack_t *)); 1520 extern ipftoken_t *ipf_findtoken __P((int, int, void *, ipf_stack_t *)); 1521 extern int ipf_getnextrule __P((ipftoken_t *, void *, 1522 ipf_stack_t *)); 1523 extern void ipf_expiretokens __P((ipf_stack_t *)); 1524 extern void ipf_freetoken __P((ipftoken_t *, ipf_stack_t *)); 1525 extern int ipf_deltoken __P((int,int, void *, ipf_stack_t *)); 1526 extern int ipf_genericiter __P((void *, int, void *, 1527 ipf_stack_t *)); 1528 1529 extern char ipfilter_version[]; 1530 #ifdef USE_INET6 1531 extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1532 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1533 extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1534 #endif 1535 extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1536 extern frentry_t *ipfrule_match __P((fr_info_t *)); 1537 1538 extern void ipftuneable_alloc(ipf_stack_t *); 1539 extern void ipftuneable_free(ipf_stack_t *); 1540 1541 #endif /* __IP_FIL_H__ */ 1542