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 #ifndef __IP_FIL_H__ 14 #define __IP_FIL_H__ 15 16 #include "netinet/ip_compat.h" 17 18 #ifndef SOLARIS 19 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 20 #endif 21 22 #ifndef __P 23 # ifdef __STDC__ 24 # define __P(x) x 25 # else 26 # define __P(x) () 27 # endif 28 #endif 29 30 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 31 # define SIOCADAFR _IOW('r', 60, struct ipfobj) 32 # define SIOCRMAFR _IOW('r', 61, struct ipfobj) 33 # define SIOCSETFF _IOW('r', 62, u_int) 34 # define SIOCGETFF _IOR('r', 63, u_int) 35 # define SIOCGETFS _IOWR('r', 64, struct ipfobj) 36 # define SIOCIPFFL _IOWR('r', 65, int) 37 # define SIOCIPFFB _IOR('r', 66, int) 38 # define SIOCADIFR _IOW('r', 67, struct ipfobj) 39 # define SIOCRMIFR _IOW('r', 68, struct ipfobj) 40 # define SIOCSWAPA _IOR('r', 69, u_int) 41 # define SIOCINAFR _IOW('r', 70, struct ipfobj) 42 # define SIOCINIFR _IOW('r', 71, struct ipfobj) 43 # define SIOCFRENB _IOW('r', 72, u_int) 44 # define SIOCFRSYN _IOW('r', 73, u_int) 45 # define SIOCFRZST _IOWR('r', 74, struct ipfobj) 46 # define SIOCZRLST _IOWR('r', 75, struct ipfobj) 47 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 48 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 49 # define SIOCATHST _IOWR('r', 78, struct ipfobj) 50 # define SIOCSTLCK _IOWR('r', 79, u_int) 51 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 52 # define SIOCSTGET _IOWR('r', 81, struct ipfobj) 53 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 54 # define SIOCGFRST _IOWR('r', 83, struct ipfobj) 55 # define SIOCSETLG _IOWR('r', 84, int) 56 # define SIOCGETLG _IOWR('r', 85, int) 57 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 58 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 59 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 60 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 61 # define SIOCIPFL6 _IOWR('r', 90, int) 62 # define SIOCIPFLP _IOWR('r', 91, int) 63 # define SIOCIPFITER _IOWR('r', 92, struct ipfobj) 64 # define SIOCGENITER _IOWR('r', 93, struct ipfobj) 65 # define SIOCGTABL _IOWR('r', 94, struct ipfobj) 66 # define SIOCIPFDELTOK _IOWR('r', 95, int) 67 # define SIOCLOOKUPITER _IOWR('r', 96, struct ipfobj) 68 #else 69 # define SIOCADAFR _IOW(r, 60, struct ipfobj) 70 # define SIOCRMAFR _IOW(r, 61, struct ipfobj) 71 # define SIOCSETFF _IOW(r, 62, u_int) 72 # define SIOCGETFF _IOR(r, 63, u_int) 73 # define SIOCGETFS _IOWR(r, 64, struct ipfobj) 74 # define SIOCIPFFL _IOWR(r, 65, int) 75 # define SIOCIPFFB _IOR(r, 66, int) 76 # define SIOCADIFR _IOW(r, 67, struct ipfobj) 77 # define SIOCRMIFR _IOW(r, 68, struct ipfobj) 78 # define SIOCSWAPA _IOR(r, 69, u_int) 79 # define SIOCINAFR _IOW(r, 70, struct ipfobj) 80 # define SIOCINIFR _IOW(r, 71, struct ipfobj) 81 # define SIOCFRENB _IOW(r, 72, u_int) 82 # define SIOCFRSYN _IOW(r, 73, u_int) 83 # define SIOCFRZST _IOWR(r, 74, struct ipfobj) 84 # define SIOCZRLST _IOWR(r, 75, struct ipfobj) 85 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 86 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 87 # define SIOCATHST _IOWR(r, 78, struct ipfobj) 88 # define SIOCSTLCK _IOWR(r, 79, u_int) 89 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 90 # define SIOCSTGET _IOWR(r, 81, struct ipfobj) 91 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 92 # define SIOCGFRST _IOWR(r, 83, struct ipfobj) 93 # define SIOCSETLG _IOWR(r, 84, int) 94 # define SIOCGETLG _IOWR(r, 85, int) 95 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 96 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 97 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 98 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 99 # define SIOCIPFL6 _IOWR(r, 90, int) 100 # define SIOCIPFLP _IOWR(r, 91, int) 101 # define SIOCIPFITER _IOWR(r, 92, struct ipfobj) 102 # define SIOCGENITER _IOWR(r, 93, struct ipfobj) 103 # define SIOCGTABL _IOWR(r, 94, struct ipfobj) 104 # define SIOCIPFDELTOK _IOWR(r, 95, int) 105 # define SIOCLOOKUPITER _IOWR(r, 96, struct ipfobj) 106 #endif 107 #define SIOCADDFR SIOCADAFR 108 #define SIOCDELFR SIOCRMAFR 109 #define SIOCINSFR SIOCINAFR 110 111 112 struct ipscan; 113 struct ifnet; 114 115 typedef struct ipf_stack ipf_stack_t; 116 117 typedef int (* lookupfunc_t) __P((void *, int, void *, ipf_stack_t *)); 118 119 120 /* 121 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 122 * as other types of objects, depending on its qualifier. 123 */ 124 #ifdef USE_INET6 125 typedef union i6addr { 126 u_32_t i6[4]; 127 struct in_addr in4; 128 struct in6_addr in6; 129 void *vptr[2]; 130 lookupfunc_t lptr[2]; 131 } i6addr_t; 132 #define in6_addr8 in6.s6_addr 133 #else 134 typedef union i6addr { 135 u_32_t i6[4]; 136 struct in_addr in4; 137 void *vptr[2]; 138 lookupfunc_t lptr[2]; 139 } i6addr_t; 140 #endif 141 142 #define in4_addr in4.s_addr 143 #define iplookupnum i6[0] 144 #define iplookuptype i6[1] 145 /* 146 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 147 */ 148 #define iplookupptr vptr[0] 149 #define iplookupfunc lptr[1] 150 151 #define I60(x) (((i6addr_t *)(x))->i6[0]) 152 #define I61(x) (((i6addr_t *)(x))->i6[1]) 153 #define I62(x) (((i6addr_t *)(x))->i6[2]) 154 #define I63(x) (((i6addr_t *)(x))->i6[3]) 155 #define HI60(x) ntohl(((i6addr_t *)(x))->i6[0]) 156 #define HI61(x) ntohl(((i6addr_t *)(x))->i6[1]) 157 #define HI62(x) ntohl(((i6addr_t *)(x))->i6[2]) 158 #define HI63(x) ntohl(((i6addr_t *)(x))->i6[3]) 159 160 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 161 (I61(a) == I61(b)) && (I60(a) == I60(b))) 162 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 163 (I61(a) != I61(b)) || (I60(a) != I60(b))) 164 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 165 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 166 #define IP6_ISONES(a) ((I63(a) == 0xffffffff) && (I62(a) == 0xffffffff) && \ 167 (I61(a) == 0xffffffff) && (I60(a) == 0xffffffff)) 168 #define IP6_GT(a,b) (ntohl(HI60(a)) > ntohl(HI60(b)) || \ 169 (HI60(a) == HI60(b) && \ 170 (ntohl(HI61(a)) > ntohl(HI61(b)) || \ 171 (HI61(a) == HI61(b) && \ 172 (ntohl(HI62(a)) > ntohl(HI62(b)) || \ 173 (HI62(a) == HI62(b) && \ 174 ntohl(HI63(a)) > ntohl(HI63(b)))))))) 175 #define IP6_LT(a,b) (ntohl(HI60(a)) < ntohl(HI60(b)) || \ 176 (HI60(a) == HI60(b) && \ 177 (ntohl(HI61(a)) < ntohl(HI61(b)) || \ 178 (HI61(a) == HI61(b) && \ 179 (ntohl(HI62(a)) < ntohl(HI62(b)) || \ 180 (HI62(a) == HI62(b) && \ 181 ntohl(HI63(a)) < ntohl(HI63(b)))))))) 182 #define NLADD(n,x) htonl(ntohl(n) + (x)) 183 #define IP6_INC(a) \ 184 { i6addr_t *_i6 = (i6addr_t *)(a); \ 185 _i6->i6[3] = NLADD(_i6->i6[3], 1); \ 186 if (_i6->i6[3] == 0) { \ 187 _i6->i6[2] = NLADD(_i6->i6[2], 1); \ 188 if (_i6->i6[2] == 0) { \ 189 _i6->i6[1] = NLADD(_i6->i6[1], 1); \ 190 if (_i6->i6[1] == 0) { \ 191 _i6->i6[0] = NLADD(_i6->i6[0], 1); \ 192 } \ 193 } \ 194 } \ 195 } 196 #define IP6_ADD(a,x,d) \ 197 { i6addr_t *_s = (i6addr_t *)(a); \ 198 i6addr_t *_d = (i6addr_t *)(d); \ 199 _d->i6[3] = NLADD(_s->i6[3], x); \ 200 if (ntohl(_d->i6[3]) < ntohl(_s->i6[3])) { \ 201 _d->i6[2] = NLADD(_d->i6[2], 1); \ 202 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 203 _d->i6[1] = NLADD(_d->i6[1], 1); \ 204 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 205 _d->i6[0] = NLADD(_d->i6[0], 1); \ 206 } \ 207 } \ 208 } \ 209 } 210 #define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \ 211 i6addr_t *_s2 = (i6addr_t *)(b); \ 212 i6addr_t *_d = (i6addr_t *)(d); \ 213 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 214 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 215 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 216 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 217 } 218 #define IP6_MASKEQ(a,m,b) \ 219 (((I60(a) & I60(m)) == I60(b)) && \ 220 ((I61(a) & I61(m)) == I61(b)) && \ 221 ((I62(a) & I62(m)) == I62(b)) && \ 222 ((I63(a) & I63(m)) == I63(b))) 223 #define IP6_MASKNEQ(a,m,b) \ 224 (((I60(a) & I60(m)) != I60(b)) || \ 225 ((I61(a) & I61(m)) != I61(b)) || \ 226 ((I62(a) & I62(m)) != I62(b)) || \ 227 ((I63(a) & I63(m)) != I63(b))) 228 #define IP6_MERGE(a,b,c) \ 229 { i6addr_t *_d, *_s1, *_s2; \ 230 _d = (i6addr_t *)(a); \ 231 _s1 = (i6addr_t *)(b); \ 232 _s2 = (i6addr_t *)(c); \ 233 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 234 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 235 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 236 _d->i6[3] |= _s1->i6[3] & ~_s2->i6[3]; \ 237 } 238 239 240 typedef struct fr_ip { 241 u_32_t fi_v:4; /* IP version */ 242 u_32_t fi_xx:4; /* spare */ 243 u_32_t fi_tos:8; /* IP packet TOS */ 244 u_32_t fi_ttl:8; /* IP packet TTL */ 245 u_32_t fi_p:8; /* IP packet protocol */ 246 u_32_t fi_optmsk; /* bitmask composed from IP options */ 247 i6addr_t fi_src; /* source address from packet */ 248 i6addr_t fi_dst; /* destination address from packet */ 249 u_short fi_secmsk; /* bitmask composed from IP security options */ 250 u_short fi_auth; /* authentication code from IP sec. options */ 251 u_32_t fi_flx; /* packet flags */ 252 u_32_t fi_tcpmsk; /* TCP options set/reset */ 253 u_32_t fi_res1; /* RESERVED */ 254 } fr_ip_t; 255 256 /* 257 * For use in fi_flx 258 */ 259 #define FI_MULTICAST 0x0001 260 #define FI_BROADCAST 0x0002 261 #define FI_FRAG 0x0004 262 #define FI_SHORT 0x0008 263 #define FI_NATED 0x0010 264 #define FI_TCPUDP 0x0020 /* TCP/UCP implied comparison*/ 265 #define FI_OPTIONS 0x0040 266 #define FI_MBCAST 0x0080 267 #define FI_STATE 0x0100 268 #define FI_BADNAT 0x0200 269 #define FI_BAD 0x0400 270 #define FI_OOW 0x0800 /* Out of state window, else match */ 271 #define FI_ICMPERR 0x1000 272 #define FI_FRAGBODY 0x2000 273 #define FI_BADSRC 0x4000 274 #define FI_LOWTTL 0x8000 275 #define FI_CMP 0xcf03 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL,broadcast */ 276 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 277 #define FI_WITH 0xeffe /* Not FI_TCPUDP */ 278 #define FI_V6EXTHDR 0x10000 279 #define FI_COALESCE 0x20000 280 #define FI_ICMPQUERY 0x40000 281 #define FI_NEWNAT 0x80000 282 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 283 #define FI_DONTCACHE 0x40000000 /* don't cache the result */ 284 #define FI_IGNORE 0x80000000 285 286 #define fi_saddr fi_src.in4.s_addr 287 #define fi_daddr fi_dst.in4.s_addr 288 #define fi_srcnum fi_src.iplookupnum 289 #define fi_dstnum fi_dst.iplookupnum 290 #define fi_srctype fi_src.iplookuptype 291 #define fi_dsttype fi_dst.iplookuptype 292 #define fi_srcptr fi_src.iplookupptr 293 #define fi_dstptr fi_dst.iplookupptr 294 #define fi_srcfunc fi_src.iplookupfunc 295 #define fi_dstfunc fi_dst.iplookupfunc 296 297 298 /* 299 * These are both used by the state and NAT code to indicate that one port or 300 * the other should be treated as a wildcard. 301 * NOTE: When updating, check bit masks in ip_state.h and update there too. 302 */ 303 #define SI_W_SPORT 0x00000100 304 #define SI_W_DPORT 0x00000200 305 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 306 #define SI_W_SADDR 0x00000400 307 #define SI_W_DADDR 0x00000800 308 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 309 #define SI_NEWFR 0x00001000 310 #define SI_CLONE 0x00002000 311 #define SI_CLONED 0x00004000 312 313 314 315 316 typedef struct fr_info { 317 void *fin_ifp; /* interface packet is `on' */ 318 fr_ip_t fin_fi; /* IP Packet summary */ 319 union { 320 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */ 321 u_32_t fid_32; 322 } fin_dat; 323 int fin_out; /* in or out ? 1 == out, 0 == in */ 324 int fin_rev; /* state only: 1 = reverse */ 325 u_short fin_hlen; /* length of IP header in bytes */ 326 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ 327 u_char fin_icode; /* ICMP error to return */ 328 u_32_t fin_rule; /* rule # last matched */ 329 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 330 struct frentry *fin_fr; /* last matching rule */ 331 void *fin_dp; /* start of data past IP header */ 332 int fin_dlen; /* length of data portion of packet */ 333 int fin_plen; 334 int fin_flen; /* length of layer 4 hdr and 335 ipv6 ext hdr after fragment hdr */ 336 int fin_ipoff; /* # bytes from buffer start to hdr */ 337 u_32_t fin_id; /* IP packet id field */ 338 u_short fin_off; 339 int fin_depth; /* Group nesting depth */ 340 int fin_error; /* Error code to return */ 341 void *fin_nat; 342 void *fin_state; 343 void *fin_nattag; 344 union { 345 ip_t *fip_ip; 346 #ifdef USE_INET6 347 ip6_t *fip_ip6; 348 #endif 349 } fin_ipu; 350 mb_t **fin_mp; /* pointer to pointer to mbuf */ 351 mb_t *fin_m; /* pointer to mbuf */ 352 #ifdef MENTAT 353 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 354 void *fin_qpi; 355 ipf_stack_t *fin_ifs; 356 #endif 357 #ifdef __sgi 358 void *fin_hbuf; 359 #endif 360 } fr_info_t; 361 362 #define fin_ip fin_ipu.fip_ip 363 #define fin_ip6 fin_ipu.fip_ip6 364 #define fin_v fin_fi.fi_v 365 #define fin_p fin_fi.fi_p 366 #define fin_flx fin_fi.fi_flx 367 #define fin_optmsk fin_fi.fi_optmsk 368 #define fin_secmsk fin_fi.fi_secmsk 369 #define fin_auth fin_fi.fi_auth 370 #define fin_src fin_fi.fi_src.in4 371 #define fin_saddr fin_fi.fi_saddr 372 #define fin_dst fin_fi.fi_dst.in4 373 #define fin_daddr fin_fi.fi_daddr 374 #define fin_data fin_dat.fid_16 375 #define fin_sport fin_dat.fid_16[0] 376 #define fin_dport fin_dat.fid_16[1] 377 #define fin_ports fin_dat.fid_32 378 379 #ifdef USE_INET6 380 # define fin_src6 fin_fi.fi_src 381 # define fin_dst6 fin_fi.fi_dst 382 # define fin_dstip6 fin_fi.fi_dst.in6 383 # define fin_srcip6 fin_fi.fi_src.in6 384 #endif 385 386 #define IPF_IN 0 387 #define IPF_OUT 1 388 389 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *)); 390 typedef int (*ipfuncinit_t) __P((struct frentry *, 391 ipf_stack_t *)); 392 393 typedef struct ipfunc_resolve { 394 char ipfu_name[32]; 395 ipfunc_t ipfu_addr; 396 ipfuncinit_t ipfu_init; 397 } ipfunc_resolve_t; 398 399 /* 400 * Size for compares on fr_info structures 401 */ 402 #define FI_CSIZE offsetof(fr_info_t, fin_icode) 403 #define FI_LCSIZE offsetof(fr_info_t, fin_dp) 404 405 /* 406 * Size for copying cache fr_info structure 407 */ 408 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 409 410 /* 411 * Structure for holding IPFilter's tag information 412 */ 413 #define IPFTAG_LEN 16 414 typedef struct { 415 union { 416 u_32_t iptu_num[4]; 417 char iptu_tag[IPFTAG_LEN]; 418 } ipt_un; 419 int ipt_not; 420 } ipftag_t; 421 422 #define ipt_tag ipt_un.iptu_tag 423 #define ipt_num ipt_un.iptu_num 424 425 426 /* 427 * This structure is used to hold information about the next hop for where 428 * to forward a packet. 429 */ 430 typedef struct frdest { 431 void *fd_ifp; 432 i6addr_t fd_ip6; 433 char fd_ifname[LIFNAMSIZ]; 434 } frdest_t; 435 436 #define fd_ip fd_ip6.in4 437 438 439 /* 440 * This structure holds information about a port comparison. 441 */ 442 typedef struct frpcmp { 443 int frp_cmp; /* data for port comparisons */ 444 u_short frp_port; /* top port for <> and >< */ 445 u_short frp_top; /* top port for <> and >< */ 446 } frpcmp_t; 447 448 #define FR_NONE 0 449 #define FR_EQUAL 1 450 #define FR_NEQUAL 2 451 #define FR_LESST 3 452 #define FR_GREATERT 4 453 #define FR_LESSTE 5 454 #define FR_GREATERTE 6 455 #define FR_OUTRANGE 7 456 #define FR_INRANGE 8 457 #define FR_INCRANGE 9 458 459 /* 460 * Structure containing all the relevant TCP things that can be checked in 461 * a filter rule. 462 */ 463 typedef struct frtuc { 464 u_char ftu_tcpfm; /* tcp flags mask */ 465 u_char ftu_tcpf; /* tcp flags */ 466 frpcmp_t ftu_src; 467 frpcmp_t ftu_dst; 468 } frtuc_t; 469 470 #define ftu_scmp ftu_src.frp_cmp 471 #define ftu_dcmp ftu_dst.frp_cmp 472 #define ftu_sport ftu_src.frp_port 473 #define ftu_dport ftu_dst.frp_port 474 #define ftu_stop ftu_src.frp_top 475 #define ftu_dtop ftu_dst.frp_top 476 477 #define FR_TCPFMAX 0x3f 478 479 /* 480 * This structure makes up what is considered to be the IPFilter specific 481 * matching components of a filter rule, as opposed to the data structures 482 * used to define the result which are in frentry_t and not here. 483 */ 484 typedef struct fripf { 485 fr_ip_t fri_ip; 486 fr_ip_t fri_mip; /* mask structure */ 487 488 u_short fri_icmpm; /* data for ICMP packets (mask) */ 489 u_short fri_icmp; 490 491 frtuc_t fri_tuc; 492 int fri_satype; /* addres type */ 493 int fri_datype; /* addres type */ 494 int fri_sifpidx; /* doing dynamic addressing */ 495 int fri_difpidx; /* index into fr_ifps[] to use when */ 496 } fripf_t; 497 498 #define fri_dstnum fri_ip.fi_dstnum 499 #define fri_srcnum fri_mip.fi_srcnum 500 #define fri_dstptr fri_ip.fi_dstptr 501 #define fri_srcptr fri_mip.fi_srcptr 502 503 #define FRI_NORMAL 0 /* Normal address */ 504 #define FRI_DYNAMIC 1 /* dynamic address */ 505 #define FRI_LOOKUP 2 /* address is a pool # */ 506 #define FRI_RANGE 3 /* address/mask is a range */ 507 #define FRI_NETWORK 4 /* network address from if */ 508 #define FRI_BROADCAST 5 /* broadcast address from if */ 509 #define FRI_PEERADDR 6 /* Peer address for P-to-P */ 510 #define FRI_NETMASKED 7 /* network address with netmask from if */ 511 512 513 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *)); 514 515 typedef struct frentry { 516 ipfmutex_t fr_lock; 517 struct frentry *fr_next; 518 struct frentry **fr_grp; 519 struct ipscan *fr_isc; 520 void *fr_ifas[4]; 521 void *fr_ptr; /* for use with fr_arg */ 522 char *fr_comment; /* text comment for rule */ 523 int fr_ref; /* reference count - for grouping */ 524 int fr_statecnt; /* state count - for limit rules */ 525 /* 526 * These are only incremented when a packet matches this rule and 527 * it is the last match 528 */ 529 U_QUAD_T fr_hits; 530 U_QUAD_T fr_bytes; 531 532 /* 533 * For PPS rate limiting 534 */ 535 struct timeval fr_lastpkt; 536 int fr_curpps; 537 538 union { 539 void *fru_data; 540 caddr_t fru_caddr; 541 fripf_t *fru_ipf; 542 frentfunc_t fru_func; 543 } fr_dun; 544 545 /* 546 * Fields after this may not change whilst in the kernel. 547 */ 548 ipfunc_t fr_func; /* call this function */ 549 int fr_dsize; 550 int fr_pps; 551 int fr_statemax; /* max reference count */ 552 int fr_flineno; /* line number from conf file */ 553 u_32_t fr_type; 554 u_32_t fr_flags; /* per-rule flags && options (see below) */ 555 u_32_t fr_logtag; /* user defined log tag # */ 556 u_32_t fr_collect; /* collection number */ 557 u_int fr_arg; /* misc. numeric arg for rule */ 558 u_int fr_loglevel; /* syslog log facility + priority */ 559 u_int fr_age[2]; /* non-TCP timeouts */ 560 u_char fr_v; 561 u_char fr_icode; /* return ICMP code */ 562 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */ 563 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */ 564 ipftag_t fr_nattag; 565 char fr_ifnames[4][LIFNAMSIZ]; 566 char fr_isctag[16]; 567 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 568 frdest_t fr_dif; /* duplicate packet interface */ 569 /* 570 * This must be last and will change after loaded into the kernel. 571 */ 572 u_int fr_cksum; /* checksum on filter rules for performance */ 573 } frentry_t; 574 575 #define fr_caddr fr_dun.fru_caddr 576 #define fr_data fr_dun.fru_data 577 #define fr_dfunc fr_dun.fru_func 578 #define fr_ipf fr_dun.fru_ipf 579 #define fr_ip fr_ipf->fri_ip 580 #define fr_mip fr_ipf->fri_mip 581 #define fr_icmpm fr_ipf->fri_icmpm 582 #define fr_icmp fr_ipf->fri_icmp 583 #define fr_tuc fr_ipf->fri_tuc 584 #define fr_satype fr_ipf->fri_satype 585 #define fr_datype fr_ipf->fri_datype 586 #define fr_sifpidx fr_ipf->fri_sifpidx 587 #define fr_difpidx fr_ipf->fri_difpidx 588 #define fr_proto fr_ip.fi_p 589 #define fr_mproto fr_mip.fi_p 590 #define fr_ttl fr_ip.fi_ttl 591 #define fr_mttl fr_mip.fi_ttl 592 #define fr_tos fr_ip.fi_tos 593 #define fr_mtos fr_mip.fi_tos 594 #define fr_tcpfm fr_tuc.ftu_tcpfm 595 #define fr_tcpf fr_tuc.ftu_tcpf 596 #define fr_scmp fr_tuc.ftu_scmp 597 #define fr_dcmp fr_tuc.ftu_dcmp 598 #define fr_dport fr_tuc.ftu_dport 599 #define fr_sport fr_tuc.ftu_sport 600 #define fr_stop fr_tuc.ftu_stop 601 #define fr_dtop fr_tuc.ftu_dtop 602 #define fr_dst fr_ip.fi_dst.in4 603 #define fr_daddr fr_ip.fi_dst.in4.s_addr 604 #define fr_src fr_ip.fi_src.in4 605 #define fr_saddr fr_ip.fi_src.in4.s_addr 606 #define fr_dmsk fr_mip.fi_dst.in4 607 #define fr_dmask fr_mip.fi_dst.in4.s_addr 608 #define fr_smsk fr_mip.fi_src.in4 609 #define fr_smask fr_mip.fi_src.in4.s_addr 610 #define fr_dstnum fr_ip.fi_dstnum 611 #define fr_srcnum fr_ip.fi_srcnum 612 #define fr_dsttype fr_ip.fi_dsttype 613 #define fr_srctype fr_ip.fi_srctype 614 #define fr_dstptr fr_mip.fi_dstptr 615 #define fr_srcptr fr_mip.fi_srcptr 616 #define fr_dstfunc fr_mip.fi_dstfunc 617 #define fr_srcfunc fr_mip.fi_srcfunc 618 #define fr_optbits fr_ip.fi_optmsk 619 #define fr_optmask fr_mip.fi_optmsk 620 #define fr_secbits fr_ip.fi_secmsk 621 #define fr_secmask fr_mip.fi_secmsk 622 #define fr_authbits fr_ip.fi_auth 623 #define fr_authmask fr_mip.fi_auth 624 #define fr_flx fr_ip.fi_flx 625 #define fr_mflx fr_mip.fi_flx 626 #define fr_ifname fr_ifnames[0] 627 #define fr_oifname fr_ifnames[2] 628 #define fr_ifa fr_ifas[0] 629 #define fr_oifa fr_ifas[2] 630 #define fr_tif fr_tifs[0] 631 #define fr_rif fr_tifs[1] 632 633 #define FR_NOLOGTAG 0 634 635 #ifndef offsetof 636 #define offsetof(t,m) (int)((&((t *)0L)->m)) 637 #endif 638 #define FR_CMPSIZ (sizeof(struct frentry) - \ 639 offsetof(struct frentry, fr_func)) 640 641 /* 642 * fr_type 643 */ 644 #define FR_T_NONE 0 645 #define FR_T_IPF 1 /* IPF structures */ 646 #define FR_T_BPFOPC 2 /* BPF opcode */ 647 #define FR_T_CALLFUNC 3 /* callout to function in fr_func only */ 648 #define FR_T_COMPIPF 4 /* compiled C code */ 649 #define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */ 650 651 /* 652 * fr_flags 653 */ 654 #define FR_CALL 0x00000 /* call rule */ 655 #define FR_BLOCK 0x00001 /* do not allow packet to pass */ 656 #define FR_PASS 0x00002 /* allow packet to pass */ 657 #define FR_AUTH 0x00003 /* use authentication */ 658 #define FR_PREAUTH 0x00004 /* require preauthentication */ 659 #define FR_ACCOUNT 0x00005 /* Accounting rule */ 660 #define FR_SKIP 0x00006 /* skip rule */ 661 #define FR_DIVERT 0x00007 /* divert rule */ 662 #define FR_CMDMASK 0x0000f 663 #define FR_LOG 0x00010 /* Log */ 664 #define FR_LOGB 0x00011 /* Log-fail */ 665 #define FR_LOGP 0x00012 /* Log-pass */ 666 #define FR_LOGMASK (FR_LOG|FR_CMDMASK) 667 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 668 #define FR_NOTSRCIP 0x00040 669 #define FR_NOTDSTIP 0x00080 670 #define FR_QUICK 0x00100 /* match & stop processing list */ 671 #define FR_KEEPFRAG 0x00200 /* keep fragment information */ 672 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 673 #define FR_FASTROUTE 0x00800 /* bypass normal routing */ 674 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 675 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 676 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 677 #define FR_OUTQUE 0x04000 /* outgoing packets */ 678 #define FR_INQUE 0x08000 /* ingoing packets */ 679 #define FR_LOGBODY 0x10000 /* Log the body */ 680 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 681 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 682 #define FR_DUP 0x80000 /* duplicate packet */ 683 #define FR_FRSTRICT 0x100000 /* strict frag. cache */ 684 #define FR_STSTRICT 0x200000 /* strict keep state */ 685 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 686 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 687 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 688 #define FR_NOMATCH 0x8000000 /* no match occured */ 689 /* 0x10000000 FF_LOGPASS */ 690 /* 0x20000000 FF_LOGBLOCK */ 691 /* 0x40000000 FF_LOGNOMATCH */ 692 /* 0x80000000 FF_BLOCKNONIP */ 693 #define FR_COPIED 0x40000000 /* copied from user space */ 694 #define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */ 695 696 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 697 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 698 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 699 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 700 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 701 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 702 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 703 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 704 #define FR_INOUT (FR_INQUE|FR_OUTQUE) 705 706 /* 707 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 708 */ 709 #define FF_LOGPASS 0x10000000 710 #define FF_LOGBLOCK 0x20000000 711 #define FF_LOGNOMATCH 0x40000000 712 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 713 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 714 715 716 /* 717 * Structure that passes information on what/how to flush to the kernel. 718 */ 719 typedef struct ipfflush { 720 int ipflu_how; 721 int ipflu_arg; 722 } ipfflush_t; 723 724 725 /* 726 * 727 */ 728 typedef struct ipfgetctl { 729 u_int ipfg_min; /* min value */ 730 u_int ipfg_current; /* current value */ 731 u_int ipfg_max; /* max value */ 732 u_int ipfg_default; /* default value */ 733 u_int ipfg_steps; /* value increments */ 734 char ipfg_name[40]; /* tag name for this control */ 735 } ipfgetctl_t; 736 737 typedef struct ipfsetctl { 738 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 739 u_int ipfs_value; /* min value */ 740 char ipfs_name[40]; /* tag name for this control */ 741 } ipfsetctl_t; 742 743 744 /* 745 * Some of the statistics below are in their own counters, but most are kept 746 * in this single structure so that they can all easily be collected and 747 * copied back as required. 748 * 749 * NOTE: when changing, keep in sync with kstats (below). 750 */ 751 typedef struct filterstats { 752 u_long fr_pass; /* packets allowed */ 753 u_long fr_block; /* packets denied */ 754 u_long fr_nom; /* packets which don't match any rule */ 755 u_long fr_short; /* packets which are short */ 756 u_long fr_ppkl; /* packets allowed and logged */ 757 u_long fr_bpkl; /* packets denied and logged */ 758 u_long fr_npkl; /* packets unmatched and logged */ 759 u_long fr_pkl; /* packets logged */ 760 u_long fr_skip; /* packets to be logged but buffer full */ 761 u_long fr_ret; /* packets for which a return is sent */ 762 u_long fr_acct; /* packets for which counting was performed */ 763 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 764 u_long fr_nfr; /* new fragment state kept */ 765 u_long fr_cfr; /* add new fragment state but complete pkt */ 766 u_long fr_bads; /* bad attempts to allocate packet state */ 767 u_long fr_ads; /* new packet state kept */ 768 u_long fr_chit; /* cached hit */ 769 u_long fr_tcpbad; /* TCP checksum check failures */ 770 u_long fr_pull[2]; /* good and bad pullup attempts */ 771 u_long fr_badsrc; /* source received doesn't match route */ 772 u_long fr_badttl; /* TTL in packet doesn't reach minimum */ 773 u_long fr_bad; /* bad IP packets to the filter */ 774 u_long fr_ipv6; /* IPv6 packets in/out */ 775 u_long fr_ppshit; /* dropped because of pps ceiling */ 776 u_long fr_ipud; /* IP id update failures */ 777 } filterstats_t; 778 779 /* 780 * kstat "copy" of the above - keep in sync! 781 * also keep in sync with initialisation code in solaris.c, ipf_kstat_init(). 782 */ 783 typedef struct filter_kstats { 784 kstat_named_t fks_pass; /* see above for comments */ 785 kstat_named_t fks_block; 786 kstat_named_t fks_nom; 787 kstat_named_t fks_short; 788 kstat_named_t fks_ppkl; 789 kstat_named_t fks_bpkl; 790 kstat_named_t fks_npkl; 791 kstat_named_t fks_pkl; 792 kstat_named_t fks_skip; 793 kstat_named_t fks_ret; 794 kstat_named_t fks_acct; 795 kstat_named_t fks_bnfr; 796 kstat_named_t fks_nfr; 797 kstat_named_t fks_cfr; 798 kstat_named_t fks_bads; 799 kstat_named_t fks_ads; 800 kstat_named_t fks_chit; 801 kstat_named_t fks_tcpbad; 802 kstat_named_t fks_pull[2]; 803 kstat_named_t fks_badsrc; 804 kstat_named_t fks_badttl; 805 kstat_named_t fks_bad; 806 kstat_named_t fks_ipv6; 807 kstat_named_t fks_ppshit; 808 kstat_named_t fks_ipud; 809 } filter_kstats_t; 810 811 /* 812 * Log structure. Each packet header logged is prepended by one of these. 813 * Following this in the log records read from the device will be an ipflog 814 * structure which is then followed by any packet data. 815 */ 816 typedef struct iplog { 817 u_32_t ipl_magic; 818 u_int ipl_count; 819 struct timeval ipl_time; 820 size_t ipl_dsize; 821 struct iplog *ipl_next; 822 } iplog_t; 823 824 #define ipl_sec ipl_time.tv_sec 825 #define ipl_usec ipl_time.tv_usec 826 827 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 828 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 829 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 830 #define IPLOG_SIZE sizeof(iplog_t) 831 832 typedef struct ipflog { 833 #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 834 (defined(OpenBSD) && (OpenBSD >= 199603)) 835 #else 836 u_int fl_unit; 837 #endif 838 u_32_t fl_rule; 839 u_32_t fl_flags; 840 u_32_t fl_lflags; 841 u_32_t fl_logtag; 842 ipftag_t fl_nattag; 843 u_short fl_plen; /* extra data after hlen */ 844 u_short fl_loglevel; /* syslog log level */ 845 char fl_group[FR_GROUPLEN]; 846 u_char fl_hlen; /* length of IP headers saved */ 847 u_char fl_dir; 848 u_char fl_xxx[2]; /* pad */ 849 char fl_ifname[LIFNAMSIZ]; 850 } ipflog_t; 851 852 #ifndef IPF_LOGGING 853 # define IPF_LOGGING 0 854 #endif 855 #ifndef IPF_DEFAULT_PASS 856 # define IPF_DEFAULT_PASS FR_PASS 857 #endif 858 859 #define DEFAULT_IPFLOGSIZE 8192 860 #ifndef IPFILTER_LOGSIZE 861 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 862 #else 863 # if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE 864 # error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE 865 # endif 866 #endif 867 868 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 869 870 /* 871 * Device filenames for reading log information. Use ipf on Solaris2 because 872 * ipl is already a name used by something else. 873 */ 874 #ifndef IPL_NAME 875 # if SOLARIS 876 # define IPL_NAME "/dev/ipf" 877 # else 878 # define IPL_NAME "/dev/ipl" 879 # endif 880 #endif 881 /* 882 * Pathnames for various IP Filter control devices. Used by LKM 883 * and userland, so defined here. 884 */ 885 #define IPNAT_NAME "/dev/ipnat" 886 #define IPSTATE_NAME "/dev/ipstate" 887 #define IPAUTH_NAME "/dev/ipauth" 888 #define IPSYNC_NAME "/dev/ipsync" 889 #define IPSCAN_NAME "/dev/ipscan" 890 #define IPLOOKUP_NAME "/dev/iplookup" 891 892 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 893 #define IPL_LOGNAT 1 894 #define IPL_LOGSTATE 2 895 #define IPL_LOGAUTH 3 896 #define IPL_LOGSYNC 4 897 #define IPL_LOGSCAN 5 898 #define IPL_LOGLOOKUP 6 899 #define IPL_LOGCOUNT 7 900 #define IPL_LOGMAX 7 901 #define IPL_LOGSIZE (IPL_LOGMAX + 1) 902 #define IPL_LOGALL -1 903 #define IPL_LOGNONE -2 904 905 /* 906 * For SIOCGETFS 907 */ 908 typedef struct friostat { 909 struct filterstats f_st[2]; 910 struct frentry *f_ipf[2][2]; 911 struct frentry *f_acct[2][2]; 912 struct frentry *f_ipf6[2][2]; 913 struct frentry *f_acct6[2][2]; 914 struct frentry *f_auth; 915 struct frgroup *f_groups[IPL_LOGSIZE][2]; 916 u_long f_froute[2]; 917 u_long f_ticks; 918 int f_locks[IPL_LOGMAX]; 919 size_t f_kmutex_sz; 920 size_t f_krwlock_sz; 921 int f_defpass; /* default pass - from fr_pass */ 922 int f_active; /* 1 or 0 - active rule set */ 923 int f_running; /* 1 if running, else 0 */ 924 int f_logging; /* 1 if enabled, else 0 */ 925 int f_features; 926 char f_version[32]; /* version string */ 927 } friostat_t; 928 929 #define f_fin f_ipf[0] 930 #define f_fin6 f_ipf6[0] 931 #define f_fout f_ipf[1] 932 #define f_fout6 f_ipf6[1] 933 #define f_acctin f_acct[0] 934 #define f_acctin6 f_acct6[0] 935 #define f_acctout f_acct[1] 936 #define f_acctout6 f_acct6[1] 937 938 #define IPF_FEAT_LKM 0x001 939 #define IPF_FEAT_LOG 0x002 940 #define IPF_FEAT_LOOKUP 0x004 941 #define IPF_FEAT_BPF 0x008 942 #define IPF_FEAT_COMPILED 0x010 943 #define IPF_FEAT_CKSUM 0x020 944 #define IPF_FEAT_SYNC 0x040 945 #define IPF_FEAT_SCAN 0x080 946 #define IPF_FEAT_IPV6 0x100 947 948 typedef struct optlist { 949 u_short ol_val; 950 int ol_bit; 951 } optlist_t; 952 953 954 /* 955 * Group list structure. 956 */ 957 typedef struct frgroup { 958 struct frgroup *fg_next; 959 struct frentry *fg_head; 960 struct frentry *fg_start; 961 u_32_t fg_flags; 962 int fg_ref; 963 char fg_name[FR_GROUPLEN]; 964 } frgroup_t; 965 966 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 967 968 969 /* 970 * Used by state and NAT tables 971 */ 972 typedef struct icmpinfo { 973 u_short ici_id; 974 u_short ici_seq; 975 u_char ici_type; 976 } icmpinfo_t; 977 978 typedef struct udpinfo { 979 u_short us_sport; 980 u_short us_dport; 981 } udpinfo_t; 982 983 984 typedef struct tcpdata { 985 u_32_t td_end; 986 u_32_t td_maxend; 987 u_32_t td_maxwin; 988 u_32_t td_winscale; 989 u_32_t td_maxseg; 990 int td_winflags; 991 } tcpdata_t; 992 993 #define TCP_WSCALE_MAX 14 994 995 #define TCP_WSCALE_SEEN 0x00000001 996 #define TCP_WSCALE_FIRST 0x00000002 997 #define TCP_SACK_PERMIT 0x00000004 998 999 1000 typedef struct tcpinfo { 1001 u_short ts_sport; 1002 u_short ts_dport; 1003 tcpdata_t ts_data[2]; 1004 } tcpinfo_t; 1005 1006 1007 /* 1008 * Structures to define a GRE header as seen in a packet. 1009 */ 1010 struct grebits { 1011 u_32_t grb_C:1; 1012 u_32_t grb_R:1; 1013 u_32_t grb_K:1; 1014 u_32_t grb_S:1; 1015 u_32_t grb_s:1; 1016 u_32_t grb_recur:1; 1017 u_32_t grb_A:1; 1018 u_32_t grb_flags:3; 1019 u_32_t grb_ver:3; 1020 u_short grb_ptype; 1021 }; 1022 1023 typedef struct grehdr { 1024 union { 1025 struct grebits gru_bits; 1026 u_short gru_flags; 1027 } gr_un; 1028 u_short gr_len; 1029 u_short gr_call; 1030 } grehdr_t; 1031 1032 #define gr_flags gr_un.gru_flags 1033 #define gr_bits gr_un.gru_bits 1034 #define gr_ptype gr_bits.grb_ptype 1035 #define gr_C gr_bits.grb_C 1036 #define gr_R gr_bits.grb_R 1037 #define gr_K gr_bits.grb_K 1038 #define gr_S gr_bits.grb_S 1039 #define gr_s gr_bits.grb_s 1040 #define gr_recur gr_bits.grb_recur 1041 #define gr_A gr_bits.grb_A 1042 #define gr_ver gr_bits.grb_ver 1043 1044 /* 1045 * GRE information tracked by "keep state" 1046 */ 1047 typedef struct greinfo { 1048 u_short gs_call[2]; 1049 u_short gs_flags; 1050 u_short gs_ptype; 1051 } greinfo_t; 1052 1053 #define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1054 1055 1056 /* 1057 * Format of an Authentication header 1058 */ 1059 typedef struct authhdr { 1060 u_char ah_next; 1061 u_char ah_plen; 1062 u_short ah_reserved; 1063 u_32_t ah_spi; 1064 u_32_t ah_seq; 1065 /* Following the sequence number field is 0 or more bytes of */ 1066 /* authentication data, as specified by ah_plen - RFC 2402. */ 1067 } authhdr_t; 1068 1069 1070 /* 1071 * Timeout tail queue list member 1072 */ 1073 typedef struct ipftqent { 1074 struct ipftqent **tqe_pnext; 1075 struct ipftqent *tqe_next; 1076 struct ipftq *tqe_ifq; 1077 void *tqe_parent; /* pointer back to NAT/state struct */ 1078 u_long tqe_die; /* when this entriy is to die */ 1079 u_long tqe_touched; 1080 int tqe_flags; 1081 int tqe_state[2]; /* current state of this entry */ 1082 } ipftqent_t; 1083 1084 #define TQE_RULEBASED 0x00000001 1085 1086 1087 /* 1088 * Timeout tail queue head for IPFilter 1089 */ 1090 typedef struct ipftq { 1091 ipfmutex_t ifq_lock; 1092 u_int ifq_ttl; 1093 ipftqent_t *ifq_head; 1094 ipftqent_t **ifq_tail; 1095 struct ipftq *ifq_next; 1096 struct ipftq **ifq_pnext; 1097 int ifq_ref; 1098 u_int ifq_flags; 1099 } ipftq_t; 1100 1101 #define IFQF_USER 0x01 /* User defined aging */ 1102 #define IFQF_DELETE 0x02 /* Marked for deletion */ 1103 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1104 1105 #define IPF_HZ_MULT 1 1106 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1107 /* checks its timeout queues. */ 1108 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1109 1110 /* 1111 * Structure to define address for pool lookups. 1112 */ 1113 typedef struct { 1114 u_char adf_len; 1115 sa_family_t adf_family; 1116 i6addr_t adf_addr; 1117 } addrfamily_t; 1118 1119 1120 /* 1121 * Object structure description. For passing through in ioctls. 1122 */ 1123 typedef struct ipfobj { 1124 u_32_t ipfo_rev; /* IPFilter version number */ 1125 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1126 void *ipfo_ptr; /* pointer to object */ 1127 int ipfo_type; /* type of object being pointed to */ 1128 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1129 u_char ipfo_xxxpad[32]; /* reserved for future use */ 1130 } ipfobj_t; 1131 1132 #define IPFOBJ_FRENTRY 0 /* struct frentry */ 1133 #define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1134 #define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1135 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1136 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1137 #define IPFOBJ_IPNAT 5 /* struct ipnat */ 1138 #define IPFOBJ_NATSTAT 6 /* struct natstat */ 1139 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1140 #define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1141 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1142 #define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1143 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1144 #define IPFOBJ_FRAUTH 12 /* struct frauth */ 1145 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1146 #define IPFOBJ_NAT 14 /* struct nat */ 1147 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1148 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1149 #define IPFOBJ_GTABLE 17 /* struct ipftable */ 1150 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1151 #define IPFOBJ_COUNT 19 /* How many #defines are above this? */ 1152 1153 1154 typedef union ipftunevalptr { 1155 void *ipftp_void; 1156 u_long *ipftp_long; 1157 u_int *ipftp_int; 1158 u_short *ipftp_short; 1159 u_char *ipftp_char; 1160 } ipftunevalptr_t; 1161 1162 typedef struct ipftuneable { 1163 ipftunevalptr_t ipft_una; 1164 char *ipft_name; 1165 u_long ipft_min; 1166 u_long ipft_max; 1167 int ipft_sz; 1168 int ipft_flags; 1169 struct ipftuneable *ipft_next; 1170 } ipftuneable_t; 1171 1172 #define ipft_addr ipft_una.ipftp_void 1173 #define ipft_plong ipft_una.ipftp_long 1174 #define ipft_pint ipft_una.ipftp_int 1175 #define ipft_pshort ipft_una.ipftp_short 1176 #define ipft_pchar ipft_una.ipftp_char 1177 1178 #define IPFT_RDONLY 1 /* read-only */ 1179 #define IPFT_WRDISABLED 2 /* write when disabled only */ 1180 1181 typedef union ipftuneval { 1182 u_long ipftu_long; 1183 u_int ipftu_int; 1184 u_short ipftu_short; 1185 u_char ipftu_char; 1186 } ipftuneval_t; 1187 1188 typedef struct ipftune { 1189 void *ipft_cookie; 1190 ipftuneval_t ipft_un; 1191 u_long ipft_min; 1192 u_long ipft_max; 1193 int ipft_sz; 1194 int ipft_flags; 1195 char ipft_name[80]; 1196 } ipftune_t; 1197 1198 #define ipft_vlong ipft_un.ipftu_long 1199 #define ipft_vint ipft_un.ipftu_int 1200 #define ipft_vshort ipft_un.ipftu_short 1201 #define ipft_vchar ipft_un.ipftu_char 1202 1203 /* 1204 * ipfruleiter is iterator structure used for filter rules. 1205 */ 1206 typedef struct ipfruleiter { 1207 int iri_ver; 1208 int iri_inout; 1209 char iri_group[FR_GROUPLEN]; 1210 int iri_active; 1211 int iri_nrules; 1212 frentry_t *iri_rule; 1213 } ipfruleiter_t; 1214 1215 /* Values for iri_inout */ 1216 #define F_IN 0 1217 #define F_OUT 1 1218 #define F_ACIN 2 1219 #define F_ACOUT 3 1220 1221 /* 1222 * ipfgeniter is generic iterator structure used for nat rules, 1223 * hostmap entries and nat table entries. 1224 */ 1225 typedef struct ipfgeniter { 1226 int igi_type; /* type of data we're looking at */ 1227 int igi_nitems; 1228 void *igi_data; 1229 } ipfgeniter_t; 1230 1231 #define IPFGENITER_IPF 0 1232 #define IPFGENITER_NAT 1 1233 #define IPFGENITER_IPNAT 2 1234 #define IPFGENITER_FRAG 3 1235 #define IPFGENITER_AUTH 4 1236 #define IPFGENITER_STATE 5 1237 #define IPFGENITER_NATFRAG 6 1238 #define IPFGENITER_HOSTMAP 7 1239 #define IPFGENITER_LOOKUP 8 1240 1241 typedef struct ipftable { 1242 int ita_type; 1243 void *ita_table; 1244 } ipftable_t; 1245 1246 typedef struct ipftoken { 1247 struct ipftoken *ipt_next; 1248 struct ipftoken **ipt_pnext; 1249 void *ipt_ctx; 1250 void *ipt_data; 1251 u_long ipt_die; 1252 int ipt_type; 1253 int ipt_uid; 1254 int ipt_subtype; 1255 int ipt_alive; 1256 } ipftoken_t; 1257 1258 1259 /* 1260 * sync commands 1261 */ 1262 #define IPFSYNC_RESYNC 0 1263 #define IPFSYNC_NEWIFP 1 1264 #define IPFSYNC_OLDIFP 2 1265 1266 1267 /* 1268 ** HPUX Port 1269 */ 1270 #ifdef __hpux 1271 /* HP-UX locking sequence deadlock detection module lock MAJOR ID */ 1272 # define IPF_SMAJ 0 /* temp assignment XXX, not critical */ 1273 #endif 1274 1275 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1276 (__FreeBSD_version >= 220000) 1277 # define CDEV_MAJOR 79 1278 #endif 1279 1280 /* 1281 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns 1282 * on those hooks. We don't need any special mods in non-IP Filter code 1283 * with this! 1284 */ 1285 #if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \ 1286 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \ 1287 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043)) 1288 # if (NetBSD >= 199905) 1289 # define PFIL_HOOKS 1290 # endif 1291 # ifdef PFIL_HOOKS 1292 # define NETBSD_PF 1293 # endif 1294 #endif 1295 1296 #ifndef _KERNEL 1297 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1298 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1299 extern int ipf_log __P((void)); 1300 extern struct ifnet *get_unit __P((char *, int, ipf_stack_t *)); 1301 extern char *get_ifname __P((struct ifnet *)); 1302 # if defined(__NetBSD__) || defined(__OpenBSD__) || \ 1303 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) 1304 extern int frrequest __P((int, u_long, caddr_t, int, int, ipf_stack_t *)); 1305 # else 1306 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int)); 1307 # endif 1308 extern int iplopen __P((dev_t, int)); 1309 extern int iplclose __P((dev_t, int)); 1310 extern void m_freem __P((mb_t *)); 1311 #else /* #ifndef _KERNEL */ 1312 extern phy_if_t get_unit __P((char *, int, ipf_stack_t *)); 1313 # if defined(__NetBSD__) && defined(PFIL_HOOKS) 1314 extern void ipfilterattach __P((int)); 1315 # endif 1316 extern int ipl_enable __P((void)); 1317 extern int ipl_disable __P((void)); 1318 # ifdef MENTAT 1319 extern int fr_check __P((struct ip *, int, void *, int, void *, 1320 mblk_t **, ipf_stack_t *)); 1321 # if SOLARIS 1322 # if SOLARIS2 >= 7 1323 extern int iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *)); 1324 # else 1325 extern int iplioctl __P((dev_t, int, int *, int, cred_t *, int *)); 1326 # endif 1327 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1328 extern int iplclose __P((dev_t, int, int, cred_t *)); 1329 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1330 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1331 # endif 1332 # ifdef __hpux 1333 extern int iplopen __P((dev_t, int, intptr_t, int)); 1334 extern int iplclose __P((dev_t, int, int)); 1335 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1336 extern int iplread __P((dev_t, uio_t *)); 1337 extern int iplwrite __P((dev_t, uio_t *)); 1338 extern int iplselect __P((dev_t, int)); 1339 # endif 1340 extern int ipfsync __P((ipf_stack_t *)); 1341 extern int fr_qout __P((queue_t *, mblk_t *)); 1342 # else /* MENTAT */ 1343 extern int fr_check __P((struct ip *, int, void *, int, mb_t **, ipf_stack_t *)); 1344 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **, ipf_stack_t *)); 1345 extern size_t mbufchainlen __P((mb_t *)); 1346 # ifdef __sgi 1347 # include <sys/cred.h> 1348 extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *)); 1349 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1350 extern int iplclose __P((dev_t, int, int, cred_t *)); 1351 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1352 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1353 extern int ipfsync __P((ipf_stack_t *)); 1354 extern int ipfilter_sgi_attach __P((void)); 1355 extern void ipfilter_sgi_detach __P((void)); 1356 extern void ipfilter_sgi_intfsync __P((void)); 1357 # else 1358 # ifdef IPFILTER_LKM 1359 extern int iplidentify __P((char *)); 1360 # endif 1361 # if (_BSDI_VERSION >= 199510) || (__FreeBSD_version >= 220000) || \ 1362 (NetBSD >= 199511) || defined(__OpenBSD__) 1363 # if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \ 1364 defined(__OpenBSD__) || (__FreeBSD_version >= 300000) 1365 # if (__FreeBSD_version >= 500024) 1366 # if (__FreeBSD_version >= 502116) 1367 extern int iplioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *)); 1368 # else 1369 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct thread *)); 1370 # endif /* __FreeBSD_version >= 502116 */ 1371 # else 1372 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 1373 # endif /* __FreeBSD_version >= 500024 */ 1374 # else 1375 extern int iplioctl __P((dev_t, int, caddr_t, int, struct proc *)); 1376 # endif 1377 # if (__FreeBSD_version >= 500024) 1378 # if (__FreeBSD_version >= 502116) 1379 extern int iplopen __P((struct cdev*, int, int, struct thread *)); 1380 extern int iplclose __P((struct cdev*, int, int, struct thread *)); 1381 # else 1382 extern int iplopen __P((dev_t, int, int, struct thread *)); 1383 extern int iplclose __P((dev_t, int, int, struct thread *)); 1384 # endif /* __FreeBSD_version >= 502116 */ 1385 # else 1386 extern int iplopen __P((dev_t, int, int, struct proc *)); 1387 extern int iplclose __P((dev_t, int, int, struct proc *)); 1388 # endif /* __FreeBSD_version >= 500024 */ 1389 # else 1390 # ifdef linux 1391 extern int iplioctl __P((struct inode *, struct file *, u_int, u_long)); 1392 # else 1393 extern int iplopen __P((dev_t, int)); 1394 extern int iplclose __P((dev_t, int)); 1395 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1396 # endif 1397 # endif /* (_BSDI_VERSION >= 199510) */ 1398 # if BSD >= 199306 1399 # if (__FreeBSD_version >= 502116) 1400 extern int iplread __P((struct cdev*, struct uio *, int)); 1401 extern int iplwrite __P((struct cdev*, struct uio *, int)); 1402 # else 1403 extern int iplread __P((dev_t, struct uio *, int)); 1404 extern int iplwrite __P((dev_t, struct uio *, int)); 1405 # endif /* __FreeBSD_version >= 502116 */ 1406 # else 1407 # ifndef linux 1408 extern int iplread __P((dev_t, struct uio *)); 1409 extern int iplwrite __P((dev_t, struct uio *)); 1410 # endif 1411 # endif /* BSD >= 199306 */ 1412 # endif /* __ sgi */ 1413 # endif /* MENTAT */ 1414 1415 #endif /* #ifndef _KERNEL */ 1416 1417 extern char *memstr __P((char *, char *, int, int)); 1418 extern int count4bits __P((u_32_t)); 1419 extern int count6bits __P((u_32_t *)); 1420 extern int frrequest __P((int, ioctlcmd_t, caddr_t, int, int, ipf_stack_t *)); 1421 extern char *getifname __P((struct ifnet *)); 1422 extern int iplattach __P((ipf_stack_t *, netstack_t *)); 1423 extern int ipldetach __P((ipf_stack_t *)); 1424 extern u_short ipf_cksum __P((u_short *, int)); 1425 extern int copyinptr __P((void *, void *, size_t)); 1426 extern int copyoutptr __P((void *, void *, size_t)); 1427 extern int fr_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *)); 1428 extern int fr_inobj __P((void *, void *, int)); 1429 extern int fr_inobjsz __P((void *, void *, int, int)); 1430 extern int fr_ioctlswitch __P((int, void *, ioctlcmd_t, int, int, void *, 1431 ipf_stack_t *)); 1432 extern int fr_ipftune __P((ioctlcmd_t, void *, ipf_stack_t *)); 1433 extern int fr_outobj __P((void *, void *, int)); 1434 extern int fr_outobjsz __P((void *, void *, int, int)); 1435 extern void *fr_pullup __P((mb_t *, fr_info_t *, int)); 1436 extern void fr_resolvedest __P((struct frdest *, int, ipf_stack_t *)); 1437 extern int fr_resolvefunc __P((void *)); 1438 extern void *fr_resolvenic __P((char *, int, ipf_stack_t *)); 1439 extern int fr_send_icmp_err __P((int, fr_info_t *, int)); 1440 extern int fr_send_reset __P((fr_info_t *)); 1441 #if (__FreeBSD_version < 490000) || !defined(_KERNEL) 1442 extern int ppsratecheck __P((struct timeval *, int *, int)); 1443 #endif 1444 extern ipftq_t *fr_addtimeoutqueue __P((ipftq_t **, u_int, ipf_stack_t *)); 1445 extern void fr_deletequeueentry __P((ipftqent_t *)); 1446 extern int fr_deletetimeoutqueue __P((ipftq_t *)); 1447 extern void fr_freetimeoutqueue __P((ipftq_t *, ipf_stack_t *)); 1448 extern void fr_movequeue __P((ipftqent_t *, ipftq_t *, ipftq_t *, 1449 ipf_stack_t *)); 1450 extern void fr_queueappend __P((ipftqent_t *, ipftq_t *, void *, 1451 ipf_stack_t *)); 1452 extern void fr_queueback __P((ipftqent_t *, ipf_stack_t *)); 1453 extern void fr_queuefront __P((ipftqent_t *)); 1454 extern void fr_checkv4sum __P((fr_info_t *)); 1455 extern int fr_checkl4sum __P((fr_info_t *)); 1456 extern int fr_ifpfillv4addr __P((int, struct sockaddr_in *, 1457 struct sockaddr_in *, struct in_addr *, 1458 struct in_addr *)); 1459 extern int fr_coalesce __P((fr_info_t *)); 1460 #ifdef USE_INET6 1461 extern void fr_checkv6sum __P((fr_info_t *)); 1462 extern int fr_ifpfillv6addr __P((int, struct sockaddr_in6 *, 1463 struct sockaddr_in6 *, struct in_addr *, 1464 struct in_addr *)); 1465 #endif 1466 1467 #define IPFILTER_COMPAT 1468 extern int fr_incomptrans __P((ipfobj_t *, void *)); 1469 extern int fr_outcomptrans __P((ipfobj_t *, void *)); 1470 1471 extern int fr_addipftune __P((ipftuneable_t *, ipf_stack_t *)); 1472 extern int fr_delipftune __P((ipftuneable_t *, ipf_stack_t *)); 1473 1474 extern int frflush __P((minor_t, int, int, ipf_stack_t *)); 1475 extern void frsync __P((int, int, void *, char *, ipf_stack_t *)); 1476 extern frgroup_t *fr_addgroup __P((char *, void *, u_32_t, minor_t, int, 1477 ipf_stack_t *)); 1478 extern int fr_derefrule __P((frentry_t **, ipf_stack_t *)); 1479 extern void fr_delgroup __P((char *, minor_t, int, ipf_stack_t *)); 1480 extern frgroup_t *fr_findgroup __P((char *, minor_t, int, frgroup_t ***, 1481 ipf_stack_t *)); 1482 1483 extern int fr_loginit __P((ipf_stack_t *)); 1484 extern int ipflog_clear __P((minor_t, ipf_stack_t *)); 1485 extern int ipflog_read __P((minor_t, struct uio *, ipf_stack_t *)); 1486 extern int ipflog __P((fr_info_t *, u_int)); 1487 extern int ipllog __P((int, fr_info_t *, void **, size_t *, int *, int, 1488 ipf_stack_t *)); 1489 extern void fr_logunload __P((ipf_stack_t *)); 1490 1491 extern frentry_t *fr_acctpkt __P((fr_info_t *, u_32_t *)); 1492 extern int fr_copytolog __P((int, char *, int)); 1493 extern u_short fr_cksum __P((mb_t *, ip_t *, int, void *)); 1494 extern void fr_deinitialise __P((ipf_stack_t *)); 1495 extern frentry_t *fr_dolog __P((fr_info_t *, u_32_t *)); 1496 extern frentry_t *fr_dstgrpmap __P((fr_info_t *, u_32_t *)); 1497 extern void fr_fixskip __P((frentry_t **, frentry_t *, int)); 1498 extern void fr_forgetifp __P((void *, ipf_stack_t *)); 1499 extern frentry_t *fr_getrulen __P((int, char *, u_32_t, 1500 ipf_stack_t *)); 1501 extern void fr_getstat __P((struct friostat *, ipf_stack_t *)); 1502 extern int fr_ifpaddr __P((int, int, void *, 1503 struct in_addr *, struct in_addr *, 1504 ipf_stack_t *)); 1505 extern int fr_initialise __P((ipf_stack_t *)); 1506 extern int fr_lock __P((caddr_t, int *)); 1507 extern int fr_makefrip __P((int, ip_t *, fr_info_t *)); 1508 extern int fr_matchtag __P((ipftag_t *, ipftag_t *)); 1509 extern int fr_matchicmpqueryreply __P((int, icmpinfo_t *, 1510 struct icmp *, int)); 1511 extern u_32_t fr_newisn __P((fr_info_t *)); 1512 extern u_short fr_nextipid __P((fr_info_t *)); 1513 extern int fr_rulen __P((int, frentry_t *, ipf_stack_t *)); 1514 extern int fr_scanlist __P((fr_info_t *, u_32_t)); 1515 extern frentry_t *fr_srcgrpmap __P((fr_info_t *, u_32_t *)); 1516 extern int fr_tcpudpchk __P((fr_info_t *, frtuc_t *)); 1517 extern int fr_verifysrc __P((fr_info_t *fin)); 1518 extern int fr_zerostats __P((char *, ipf_stack_t *)); 1519 extern ipftoken_t *ipf_findtoken __P((int, int, void *, ipf_stack_t *)); 1520 extern int ipf_getnextrule __P((ipftoken_t *, void *, 1521 ipf_stack_t *)); 1522 extern void ipf_expiretokens __P((ipf_stack_t *)); 1523 extern void ipf_freetoken __P((ipftoken_t *, ipf_stack_t *)); 1524 extern int ipf_deltoken __P((int,int, void *, ipf_stack_t *)); 1525 extern int ipf_genericiter __P((void *, int, void *, 1526 ipf_stack_t *)); 1527 #ifndef ipf_random 1528 extern u_32_t ipf_random __P((void)); 1529 #endif 1530 1531 extern char ipfilter_version[]; 1532 #ifdef USE_INET6 1533 extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1534 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1535 extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1536 #endif 1537 extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1538 extern frentry_t *ipfrule_match __P((fr_info_t *)); 1539 1540 extern void ipftuneable_alloc(ipf_stack_t *); 1541 extern void ipftuneable_free(ipf_stack_t *); 1542 1543 #endif /* __IP_FIL_H__ */ 1544