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 * $FreeBSD: stable/9/sys/contrib/ipfilter/netinet/ip_fil.h 180778 2008-07-24 12:35:05Z darrenr $ 8 * Id: ip_fil.h,v 2.170.2.51 2007/10/10 09:48:03 darrenr Exp $ 9 */ 10 11 #ifndef __IP_FIL_H__ 12 #define __IP_FIL_H__ 13 14 #include "netinet/ip_compat.h" 15 16 #ifndef SOLARIS 17 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 18 #endif 19 20 #ifndef __P 21 # ifdef __STDC__ 22 # define __P(x) x 23 # else 24 # define __P(x) () 25 # endif 26 #endif 27 28 #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 29 # define SIOCADAFR _IOW('r', 60, struct ipfobj) 30 # define SIOCRMAFR _IOW('r', 61, struct ipfobj) 31 # define SIOCSETFF _IOW('r', 62, u_int) 32 # define SIOCGETFF _IOR('r', 63, u_int) 33 # define SIOCGETFS _IOWR('r', 64, struct ipfobj) 34 # define SIOCIPFFL _IOWR('r', 65, int) 35 # define SIOCIPFFB _IOR('r', 66, int) 36 # define SIOCADIFR _IOW('r', 67, struct ipfobj) 37 # define SIOCRMIFR _IOW('r', 68, struct ipfobj) 38 # define SIOCSWAPA _IOR('r', 69, u_int) 39 # define SIOCINAFR _IOW('r', 70, struct ipfobj) 40 # define SIOCINIFR _IOW('r', 71, struct ipfobj) 41 # define SIOCFRENB _IOW('r', 72, u_int) 42 # define SIOCFRSYN _IOW('r', 73, u_int) 43 # define SIOCFRZST _IOWR('r', 74, struct ipfobj) 44 # define SIOCZRLST _IOWR('r', 75, struct ipfobj) 45 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 46 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 47 # define SIOCSTAT1 _IOWR('r', 78, struct ipfobj) 48 # define SIOCSTLCK _IOWR('r', 79, u_int) 49 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 50 # define SIOCSTGET _IOWR('r', 81, struct ipfobj) 51 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 52 # define SIOCSTAT2 _IOWR('r', 83, struct ipfobj) 53 # define SIOCSETLG _IOWR('r', 84, int) 54 # define SIOCGETLG _IOWR('r', 85, int) 55 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 56 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 57 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 58 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 59 # define SIOCIPFL6 _IOWR('r', 90, int) 60 # define SIOCIPFITER _IOWR('r', 91, struct ipfobj) 61 # define SIOCGENITER _IOWR('r', 92, struct ipfobj) 62 # define SIOCGTABL _IOWR('r', 93, struct ipfobj) 63 # define SIOCIPFDELTOK _IOWR('r', 94, int) 64 # define SIOCLOOKUPITER _IOWR('r', 95, struct ipfobj) 65 # define SIOCGTQTAB _IOWR('r', 96, struct ipfobj) 66 #else 67 # define SIOCADAFR _IOW(r, 60, struct ipfobj) 68 # define SIOCRMAFR _IOW(r, 61, struct ipfobj) 69 # define SIOCSETFF _IOW(r, 62, u_int) 70 # define SIOCGETFF _IOR(r, 63, u_int) 71 # define SIOCGETFS _IOWR(r, 64, struct ipfobj) 72 # define SIOCIPFFL _IOWR(r, 65, int) 73 # define SIOCIPFFB _IOR(r, 66, int) 74 # define SIOCADIFR _IOW(r, 67, struct ipfobj) 75 # define SIOCRMIFR _IOW(r, 68, struct ipfobj) 76 # define SIOCSWAPA _IOR(r, 69, u_int) 77 # define SIOCINAFR _IOW(r, 70, struct ipfobj) 78 # define SIOCINIFR _IOW(r, 71, struct ipfobj) 79 # define SIOCFRENB _IOW(r, 72, u_int) 80 # define SIOCFRSYN _IOW(r, 73, u_int) 81 # define SIOCFRZST _IOWR(r, 74, struct ipfobj) 82 # define SIOCZRLST _IOWR(r, 75, struct ipfobj) 83 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 84 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 85 # define SIOCSTAT1 _IOWR(r, 78, struct ipfobj) 86 # define SIOCSTLCK _IOWR(r, 79, u_int) 87 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 88 # define SIOCSTGET _IOWR(r, 81, struct ipfobj) 89 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 90 # define SIOCSTAT2 _IOWR(r, 83, struct ipfobj) 91 # define SIOCSETLG _IOWR(r, 84, int) 92 # define SIOCGETLG _IOWR(r, 85, int) 93 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 94 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 95 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 96 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 97 # define SIOCIPFL6 _IOWR(r, 90, int) 98 # define SIOCIPFITER _IOWR(r, 91, struct ipfobj) 99 # define SIOCGENITER _IOWR(r, 92, struct ipfobj) 100 # define SIOCGTABL _IOWR(r, 93, struct ipfobj) 101 # define SIOCIPFDELTOK _IOWR(r, 94, int) 102 # define SIOCLOOKUPITER _IOWR(r, 95, struct ipfobj) 103 # define SIOCGTQTAB _IOWR(r, 96, struct ipfobj) 104 #endif 105 #define SIOCADDFR SIOCADAFR 106 #define SIOCDELFR SIOCRMAFR 107 #define SIOCINSFR SIOCINAFR 108 #define SIOCATHST SIOCSTAT1 109 #define SIOCGFRST SIOCSTAT2 110 111 112 struct ipscan; 113 struct ifnet; 114 115 116 typedef int (* lookupfunc_t) __P((void *, int, void *)); 117 118 /* 119 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 120 * as other types of objects, depending on its qualifier. 121 */ 122 #ifdef USE_INET6 123 typedef union i6addr { 124 u_32_t i6[4]; 125 struct in_addr in4; 126 struct in6_addr in6; 127 void *vptr[2]; 128 lookupfunc_t lptr[2]; 129 struct { 130 u_short type; 131 u_short subtype; 132 char label[12]; 133 } i6un; 134 } i6addr_t; 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 struct { 142 u_short type; 143 u_short subtype; 144 char label[12]; 145 } i6un; 146 } i6addr_t; 147 #endif 148 149 #define in4_addr in4.s_addr 150 #define iplookupnum i6[1] 151 #define iplookupname i6un.label 152 #define iplookuptype i6un.type 153 #define iplookupsubtype i6un.subtype 154 /* 155 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 156 */ 157 #define iplookupptr vptr[0] 158 #define iplookupfunc lptr[1] 159 160 #define I60(x) (((u_32_t *)(x))[0]) 161 #define I61(x) (((u_32_t *)(x))[1]) 162 #define I62(x) (((u_32_t *)(x))[2]) 163 #define I63(x) (((u_32_t *)(x))[3]) 164 #define HI60(x) ntohl(((u_32_t *)(x))[0]) 165 #define HI61(x) ntohl(((u_32_t *)(x))[1]) 166 #define HI62(x) ntohl(((u_32_t *)(x))[2]) 167 #define HI63(x) ntohl(((u_32_t *)(x))[3]) 168 169 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 170 (I61(a) == I61(b)) && (I60(a) == I60(b))) 171 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 172 (I61(a) != I61(b)) || (I60(a) != I60(b))) 173 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 174 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 175 #define IP6_GT(a,b) (HI60(a) > HI60(b) || (HI60(a) == HI60(b) && \ 176 (HI61(a) > HI61(b) || (HI61(a) == HI61(b) && \ 177 (HI62(a) > HI62(b) || (HI62(a) == HI62(b) && \ 178 HI63(a) > HI63(b))))))) 179 #define IP6_LT(a,b) (HI60(a) < HI60(b) || (HI60(a) == HI60(b) && \ 180 (HI61(a) < HI61(b) || (HI61(a) == HI61(b) && \ 181 (HI62(a) < HI62(b) || (HI62(a) == HI62(b) && \ 182 HI63(a) < HI63(b))))))) 183 #define NLADD(n,x) htonl(ntohl(n) + (x)) 184 #define IP6_INC(a) \ 185 { u_32_t *_i6 = (u_32_t *)(a); \ 186 _i6[3] = NLADD(_i6[3], 1); \ 187 if (_i6[3] == 0) { \ 188 _i6[2] = NLADD(_i6[2], 1); \ 189 if (_i6[2] == 0) { \ 190 _i6[1] = NLADD(_i6[1], 1); \ 191 if (_i6[1] == 0) { \ 192 _i6[0] = NLADD(_i6[0], 1); \ 193 } \ 194 } \ 195 } \ 196 } 197 #define IP6_ADD(a,x,d) \ 198 { i6addr_t *_s = (i6addr_t *)(a); \ 199 i6addr_t *_d = (i6addr_t *)(d); \ 200 _d->i6[0] = NLADD(_s->i6[0], x); \ 201 if (ntohl(_d->i6[0]) < ntohl(_s->i6[0])) { \ 202 _d->i6[1] = NLADD(_d->i6[1], 1); \ 203 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 204 _d->i6[2] = NLADD(_d->i6[2], 1); \ 205 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 206 _d->i6[3] = NLADD(_d->i6[3], 1); \ 207 } \ 208 } \ 209 } \ 210 } 211 #define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \ 212 i6addr_t *_s2 = (i6addr_t *)(d); \ 213 i6addr_t *_d = (i6addr_t *)(d); \ 214 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 215 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 216 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 217 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 218 } 219 #define IP6_MERGE(a,b,c) \ 220 { i6addr_t *_d, *_s1, *_s2; \ 221 _d = (i6addr_t *)(a); \ 222 _s1 = (i6addr_t *)(b); \ 223 _s2 = (i6addr_t *)(c); \ 224 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 225 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 226 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 227 _d->i6[2] |= _s1->i6[3] & ~_s2->i6[3]; \ 228 } 229 230 231 typedef struct fr_ip { 232 u_32_t fi_v:4; /* IP version */ 233 u_32_t fi_xx:4; /* spare */ 234 u_32_t fi_tos:8; /* IP packet TOS */ 235 u_32_t fi_ttl:8; /* IP packet TTL */ 236 u_32_t fi_p:8; /* IP packet protocol */ 237 u_32_t fi_optmsk; /* bitmask composed from IP options */ 238 i6addr_t fi_src; /* source address from packet */ 239 i6addr_t fi_dst; /* destination address from packet */ 240 u_short fi_secmsk; /* bitmask composed from IP security options */ 241 u_short fi_auth; /* authentication code from IP sec. options */ 242 u_32_t fi_flx; /* packet flags */ 243 u_32_t fi_tcpmsk; /* TCP options set/reset */ 244 u_32_t fi_res1; /* RESERVED */ 245 } fr_ip_t; 246 247 /* 248 * For use in fi_flx 249 */ 250 #define FI_TCPUDP 0x0001 /* TCP/UCP implied comparison*/ 251 #define FI_OPTIONS 0x0002 252 #define FI_FRAG 0x0004 253 #define FI_SHORT 0x0008 254 #define FI_NATED 0x0010 255 #define FI_MULTICAST 0x0020 256 #define FI_BROADCAST 0x0040 257 #define FI_MBCAST 0x0080 258 #define FI_STATE 0x0100 259 #define FI_BADNAT 0x0200 260 #define FI_BAD 0x0400 261 #define FI_OOW 0x0800 /* Out of state window, else match */ 262 #define FI_ICMPERR 0x1000 263 #define FI_FRAGBODY 0x2000 264 #define FI_BADSRC 0x4000 265 #define FI_LOWTTL 0x8000 266 #define FI_CMP 0xcf03 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL,broadcast */ 267 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 268 #define FI_WITH 0xeffe /* Not FI_TCPUDP */ 269 #define FI_V6EXTHDR 0x10000 270 #define FI_COALESCE 0x20000 271 #define FI_NEWNAT 0x40000 272 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 273 #define FI_DONTCACHE 0x40000000 /* don't cache the result */ 274 #define FI_IGNORE 0x80000000 275 276 #define fi_saddr fi_src.in4.s_addr 277 #define fi_daddr fi_dst.in4.s_addr 278 #define fi_srcnum fi_src.iplookupnum 279 #define fi_dstnum fi_dst.iplookupnum 280 #define fi_srcname fi_src.iplookupname 281 #define fi_dstname fi_dst.iplookupname 282 #define fi_srctype fi_src.iplookuptype 283 #define fi_dsttype fi_dst.iplookuptype 284 #define fi_srcsubtype fi_src.iplookupsubtype 285 #define fi_dstsubtype fi_dst.iplookupsubtype 286 #define fi_srcptr fi_src.iplookupptr 287 #define fi_dstptr fi_dst.iplookupptr 288 #define fi_srcfunc fi_src.iplookupfunc 289 #define fi_dstfunc fi_dst.iplookupfunc 290 291 292 /* 293 * These are both used by the state and NAT code to indicate that one port or 294 * the other should be treated as a wildcard. 295 * NOTE: When updating, check bit masks in ip_state.h and update there too. 296 */ 297 #define SI_W_SPORT 0x00000100 298 #define SI_W_DPORT 0x00000200 299 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 300 #define SI_W_SADDR 0x00000400 301 #define SI_W_DADDR 0x00000800 302 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 303 #define SI_NEWFR 0x00001000 304 #define SI_CLONE 0x00002000 305 #define SI_CLONED 0x00004000 306 307 308 typedef struct fr_info { 309 void *fin_ifp; /* interface packet is `on' */ 310 fr_ip_t fin_fi; /* IP Packet summary */ 311 union { 312 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */ 313 u_32_t fid_32; 314 } fin_dat; 315 int fin_out; /* in or out ? 1 == out, 0 == in */ 316 int fin_rev; /* state only: 1 = reverse */ 317 u_short fin_hlen; /* length of IP header in bytes */ 318 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ 319 u_char fin_icode; /* ICMP error to return */ 320 u_32_t fin_rule; /* rule # last matched */ 321 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 322 struct frentry *fin_fr; /* last matching rule */ 323 void *fin_dp; /* start of data past IP header */ 324 int fin_dlen; /* length of data portion of packet */ 325 int fin_plen; 326 int fin_ipoff; /* # bytes from buffer start to hdr */ 327 u_short fin_id; /* IP packet id field */ 328 u_short fin_off; 329 int fin_depth; /* Group nesting depth */ 330 int fin_error; /* Error code to return */ 331 int fin_cksum; /* -1 bad, 1 good, 0 not done */ 332 void *fin_nat; 333 void *fin_state; 334 void *fin_nattag; 335 void *fin_exthdr; 336 ip_t *fin_ip; 337 mb_t **fin_mp; /* pointer to pointer to mbuf */ 338 mb_t *fin_m; /* pointer to mbuf */ 339 #ifdef MENTAT 340 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 341 void *fin_qpi; 342 char fin_ifname[LIFNAMSIZ]; 343 #endif 344 #ifdef __sgi 345 void *fin_hbuf; 346 #endif 347 } fr_info_t; 348 349 #define fin_v fin_fi.fi_v 350 #define fin_p fin_fi.fi_p 351 #define fin_flx fin_fi.fi_flx 352 #define fin_optmsk fin_fi.fi_optmsk 353 #define fin_secmsk fin_fi.fi_secmsk 354 #define fin_auth fin_fi.fi_auth 355 #define fin_src fin_fi.fi_src.in4 356 #define fin_src6 fin_fi.fi_src.in6 357 #define fin_saddr fin_fi.fi_saddr 358 #define fin_dst fin_fi.fi_dst.in4 359 #define fin_dst6 fin_fi.fi_dst.in6 360 #define fin_daddr fin_fi.fi_daddr 361 #define fin_data fin_dat.fid_16 362 #define fin_sport fin_dat.fid_16[0] 363 #define fin_dport fin_dat.fid_16[1] 364 #define fin_ports fin_dat.fid_32 365 366 #define IPF_IN 0 367 #define IPF_OUT 1 368 369 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *)); 370 typedef int (*ipfuncinit_t) __P((struct frentry *)); 371 372 typedef struct ipfunc_resolve { 373 char ipfu_name[32]; 374 ipfunc_t ipfu_addr; 375 ipfuncinit_t ipfu_init; 376 } ipfunc_resolve_t; 377 378 /* 379 * Size for compares on fr_info structures 380 */ 381 #define FI_CSIZE offsetof(fr_info_t, fin_icode) 382 #define FI_LCSIZE offsetof(fr_info_t, fin_dp) 383 384 /* 385 * Size for copying cache fr_info structure 386 */ 387 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 388 389 /* 390 * Structure for holding IPFilter's tag information 391 */ 392 #define IPFTAG_LEN 16 393 typedef struct { 394 union { 395 u_32_t iptu_num[4]; 396 char iptu_tag[IPFTAG_LEN]; 397 } ipt_un; 398 int ipt_not; 399 } ipftag_t; 400 401 #define ipt_tag ipt_un.iptu_tag 402 #define ipt_num ipt_un.iptu_num 403 404 405 /* 406 * This structure is used to hold information about the next hop for where 407 * to forward a packet. 408 */ 409 typedef struct frdest { 410 void *fd_ifp; 411 i6addr_t fd_ip6; 412 char fd_ifname[LIFNAMSIZ]; 413 } frdest_t; 414 415 #define fd_ip fd_ip6.in4 416 417 418 /* 419 * This structure holds information about a port comparison. 420 */ 421 typedef struct frpcmp { 422 int frp_cmp; /* data for port comparisons */ 423 u_short frp_port; /* top port for <> and >< */ 424 u_short frp_top; /* top port for <> and >< */ 425 } frpcmp_t; 426 427 #define FR_NONE 0 428 #define FR_EQUAL 1 429 #define FR_NEQUAL 2 430 #define FR_LESST 3 431 #define FR_GREATERT 4 432 #define FR_LESSTE 5 433 #define FR_GREATERTE 6 434 #define FR_OUTRANGE 7 435 #define FR_INRANGE 8 436 #define FR_INCRANGE 9 437 438 /* 439 * Structure containing all the relevant TCP things that can be checked in 440 * a filter rule. 441 */ 442 typedef struct frtuc { 443 u_char ftu_tcpfm; /* tcp flags mask */ 444 u_char ftu_tcpf; /* tcp flags */ 445 frpcmp_t ftu_src; 446 frpcmp_t ftu_dst; 447 } frtuc_t; 448 449 #define ftu_scmp ftu_src.frp_cmp 450 #define ftu_dcmp ftu_dst.frp_cmp 451 #define ftu_sport ftu_src.frp_port 452 #define ftu_dport ftu_dst.frp_port 453 #define ftu_stop ftu_src.frp_top 454 #define ftu_dtop ftu_dst.frp_top 455 456 #define FR_TCPFMAX 0x3f 457 458 /* 459 * This structure makes up what is considered to be the IPFilter specific 460 * matching components of a filter rule, as opposed to the data structures 461 * used to define the result which are in frentry_t and not here. 462 */ 463 typedef struct fripf { 464 fr_ip_t fri_ip; 465 fr_ip_t fri_mip; /* mask structure */ 466 467 u_short fri_icmpm; /* data for ICMP packets (mask) */ 468 u_short fri_icmp; 469 470 frtuc_t fri_tuc; 471 int fri_satype; /* addres type */ 472 int fri_datype; /* addres type */ 473 int fri_sifpidx; /* doing dynamic addressing */ 474 int fri_difpidx; /* index into fr_ifps[] to use when */ 475 } fripf_t; 476 477 #define fri_dlookup fri_mip.fi_dst 478 #define fri_slookup fri_mip.fi_src 479 #define fri_dstnum fri_mip.fi_dstnum 480 #define fri_srcnum fri_mip.fi_srcnum 481 #define fri_dstname fri_mip.fi_dstname 482 #define fri_srcname fri_mip.fi_srcname 483 #define fri_dstptr fri_mip.fi_dstptr 484 #define fri_srcptr fri_mip.fi_srcptr 485 486 #define FRI_NORMAL 0 /* Normal address */ 487 #define FRI_DYNAMIC 1 /* dynamic address */ 488 #define FRI_LOOKUP 2 /* address is a pool # */ 489 #define FRI_RANGE 3 /* address/mask is a range */ 490 #define FRI_NETWORK 4 /* network address from if */ 491 #define FRI_BROADCAST 5 /* broadcast address from if */ 492 #define FRI_PEERADDR 6 /* Peer address for P-to-P */ 493 #define FRI_NETMASKED 7 /* network address with netmask from if */ 494 495 496 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *)); 497 498 typedef struct frentry { 499 ipfmutex_t fr_lock; 500 struct frentry *fr_next; 501 struct frentry **fr_grp; 502 struct ipscan *fr_isc; 503 void *fr_ifas[4]; 504 void *fr_ptr; /* for use with fr_arg */ 505 char *fr_comment; /* text comment for rule */ 506 int fr_ref; /* reference count - for grouping */ 507 int fr_statecnt; /* state count - for limit rules */ 508 /* 509 * The line number from a file is here because we need to be able to 510 * match the rule generated with ``grep rule ipf.conf | ipf -rf -'' 511 * with the rule loaded using ``ipf -f ipf.conf'' - thus it can't be 512 * on the other side of fr_func. 513 */ 514 int fr_flineno; /* line number from conf file */ 515 /* 516 * These are only incremented when a packet matches this rule and 517 * it is the last match 518 */ 519 U_QUAD_T fr_hits; 520 U_QUAD_T fr_bytes; 521 522 /* 523 * For PPS rate limiting 524 */ 525 struct timeval fr_lastpkt; 526 int fr_curpps; 527 528 union { 529 void *fru_data; 530 caddr_t fru_caddr; 531 fripf_t *fru_ipf; 532 frentfunc_t fru_func; 533 } fr_dun; 534 535 /* 536 * Fields after this may not change whilst in the kernel. 537 */ 538 ipfunc_t fr_func; /* call this function */ 539 int fr_dsize; 540 int fr_pps; 541 int fr_statemax; /* max reference count */ 542 u_32_t fr_type; 543 u_32_t fr_flags; /* per-rule flags && options (see below) */ 544 u_32_t fr_logtag; /* user defined log tag # */ 545 u_32_t fr_collect; /* collection number */ 546 u_int fr_arg; /* misc. numeric arg for rule */ 547 u_int fr_loglevel; /* syslog log facility + priority */ 548 u_int fr_age[2]; /* non-TCP timeouts */ 549 u_char fr_v; 550 u_char fr_icode; /* return ICMP code */ 551 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */ 552 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */ 553 ipftag_t fr_nattag; 554 char fr_ifnames[4][LIFNAMSIZ]; 555 char fr_isctag[16]; 556 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 557 frdest_t fr_dif; /* duplicate packet interface */ 558 /* 559 * This must be last and will change after loaded into the kernel. 560 */ 561 u_int fr_cksum; /* checksum on filter rules for performance */ 562 } frentry_t; 563 564 #define fr_caddr fr_dun.fru_caddr 565 #define fr_data fr_dun.fru_data 566 #define fr_dfunc fr_dun.fru_func 567 #define fr_ipf fr_dun.fru_ipf 568 #define fr_ip fr_ipf->fri_ip 569 #define fr_mip fr_ipf->fri_mip 570 #define fr_icmpm fr_ipf->fri_icmpm 571 #define fr_icmp fr_ipf->fri_icmp 572 #define fr_tuc fr_ipf->fri_tuc 573 #define fr_satype fr_ipf->fri_satype 574 #define fr_datype fr_ipf->fri_datype 575 #define fr_sifpidx fr_ipf->fri_sifpidx 576 #define fr_difpidx fr_ipf->fri_difpidx 577 #define fr_proto fr_ip.fi_p 578 #define fr_mproto fr_mip.fi_p 579 #define fr_ttl fr_ip.fi_ttl 580 #define fr_mttl fr_mip.fi_ttl 581 #define fr_tos fr_ip.fi_tos 582 #define fr_mtos fr_mip.fi_tos 583 #define fr_tcpfm fr_tuc.ftu_tcpfm 584 #define fr_tcpf fr_tuc.ftu_tcpf 585 #define fr_scmp fr_tuc.ftu_scmp 586 #define fr_dcmp fr_tuc.ftu_dcmp 587 #define fr_dport fr_tuc.ftu_dport 588 #define fr_sport fr_tuc.ftu_sport 589 #define fr_stop fr_tuc.ftu_stop 590 #define fr_dtop fr_tuc.ftu_dtop 591 #define fr_dst fr_ip.fi_dst.in4 592 #define fr_daddr fr_ip.fi_dst.in4.s_addr 593 #define fr_src fr_ip.fi_src.in4 594 #define fr_saddr fr_ip.fi_src.in4.s_addr 595 #define fr_dmsk fr_mip.fi_dst.in4 596 #define fr_dmask fr_mip.fi_dst.in4.s_addr 597 #define fr_smsk fr_mip.fi_src.in4 598 #define fr_smask fr_mip.fi_src.in4.s_addr 599 #define fr_dstnum fr_ip.fi_dstnum 600 #define fr_srcnum fr_ip.fi_srcnum 601 #define fr_dlookup fr_ip.fi_dst 602 #define fr_slookup fr_ip.fi_src 603 #define fr_dstname fr_ip.fi_dstname 604 #define fr_srcname fr_ip.fi_srcname 605 #define fr_dsttype fr_ip.fi_dsttype 606 #define fr_srctype fr_ip.fi_srctype 607 #define fr_dstsubtype fr_ip.fi_dstsubtype 608 #define fr_srcsubtype fr_ip.fi_srcsubtype 609 #define fr_dstptr fr_mip.fi_dstptr 610 #define fr_srcptr fr_mip.fi_srcptr 611 #define fr_dstfunc fr_mip.fi_dstfunc 612 #define fr_srcfunc fr_mip.fi_srcfunc 613 #define fr_optbits fr_ip.fi_optmsk 614 #define fr_optmask fr_mip.fi_optmsk 615 #define fr_secbits fr_ip.fi_secmsk 616 #define fr_secmask fr_mip.fi_secmsk 617 #define fr_authbits fr_ip.fi_auth 618 #define fr_authmask fr_mip.fi_auth 619 #define fr_flx fr_ip.fi_flx 620 #define fr_mflx fr_mip.fi_flx 621 #define fr_ifname fr_ifnames[0] 622 #define fr_oifname fr_ifnames[2] 623 #define fr_ifa fr_ifas[0] 624 #define fr_oifa fr_ifas[2] 625 #define fr_tif fr_tifs[0] 626 #define fr_rif fr_tifs[1] 627 628 #define FR_NOLOGTAG 0 629 630 #ifndef offsetof 631 #define offsetof(t,m) (int)((&((t *)0L)->m)) 632 #endif 633 #define FR_CMPSIZ (sizeof(struct frentry) - \ 634 offsetof(struct frentry, fr_func)) 635 636 /* 637 * fr_type 638 */ 639 #define FR_T_NONE 0 640 #define FR_T_IPF 1 /* IPF structures */ 641 #define FR_T_BPFOPC 2 /* BPF opcode */ 642 #define FR_T_CALLFUNC 3 /* callout to function in fr_func only */ 643 #define FR_T_COMPIPF 4 /* compiled C code */ 644 #define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */ 645 646 /* 647 * fr_flags 648 */ 649 #define FR_CALL 0x00000 /* call rule */ 650 #define FR_BLOCK 0x00001 /* do not allow packet to pass */ 651 #define FR_PASS 0x00002 /* allow packet to pass */ 652 #define FR_AUTH 0x00003 /* use authentication */ 653 #define FR_PREAUTH 0x00004 /* require preauthentication */ 654 #define FR_ACCOUNT 0x00005 /* Accounting rule */ 655 #define FR_SKIP 0x00006 /* skip rule */ 656 #define FR_DIVERT 0x00007 /* divert rule */ 657 #define FR_CMDMASK 0x0000f 658 #define FR_LOG 0x00010 /* Log */ 659 #define FR_LOGB 0x00011 /* Log-fail */ 660 #define FR_LOGP 0x00012 /* Log-pass */ 661 #define FR_LOGMASK (FR_LOG|FR_CMDMASK) 662 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 663 #define FR_NOTSRCIP 0x00040 664 #define FR_NOTDSTIP 0x00080 665 #define FR_QUICK 0x00100 /* match & stop processing list */ 666 #define FR_KEEPFRAG 0x00200 /* keep fragment information */ 667 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 668 #define FR_FASTROUTE 0x00800 /* bypass normal routing */ 669 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 670 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 671 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 672 #define FR_OUTQUE 0x04000 /* outgoing packets */ 673 #define FR_INQUE 0x08000 /* ingoing packets */ 674 #define FR_LOGBODY 0x10000 /* Log the body */ 675 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 676 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 677 #define FR_DUP 0x80000 /* duplicate packet */ 678 #define FR_FRSTRICT 0x100000 /* strict frag. cache */ 679 #define FR_STSTRICT 0x200000 /* strict keep state */ 680 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 681 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 682 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 683 #define FR_NOMATCH 0x8000000 /* no match occured */ 684 /* 0x10000000 FF_LOGPASS */ 685 /* 0x20000000 FF_LOGBLOCK */ 686 /* 0x40000000 FF_LOGNOMATCH */ 687 /* 0x80000000 FF_BLOCKNONIP */ 688 #define FR_COPIED 0x40000000 /* copied from user space */ 689 #define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */ 690 691 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 692 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 693 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 694 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 695 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 696 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 697 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 698 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 699 #define FR_INOUT (FR_INQUE|FR_OUTQUE) 700 701 /* 702 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 703 */ 704 #define FF_LOGPASS 0x10000000 705 #define FF_LOGBLOCK 0x20000000 706 #define FF_LOGNOMATCH 0x40000000 707 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 708 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 709 710 711 /* 712 * Structure that passes information on what/how to flush to the kernel. 713 */ 714 typedef struct ipfflush { 715 int ipflu_how; 716 int ipflu_arg; 717 } ipfflush_t; 718 719 720 /* 721 * 722 */ 723 typedef struct ipfgetctl { 724 u_int ipfg_min; /* min value */ 725 u_int ipfg_current; /* current value */ 726 u_int ipfg_max; /* max value */ 727 u_int ipfg_default; /* default value */ 728 u_int ipfg_steps; /* value increments */ 729 char ipfg_name[40]; /* tag name for this control */ 730 } ipfgetctl_t; 731 732 typedef struct ipfsetctl { 733 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 734 u_int ipfs_value; /* min value */ 735 char ipfs_name[40]; /* tag name for this control */ 736 } ipfsetctl_t; 737 738 739 /* 740 * Some of the statistics below are in their own counters, but most are kept 741 * in this single structure so that they can all easily be collected and 742 * copied back as required. 743 */ 744 typedef struct filterstats { 745 u_long fr_pass; /* packets allowed */ 746 u_long fr_block; /* packets denied */ 747 u_long fr_nom; /* packets which don't match any rule */ 748 u_long fr_short; /* packets which are short */ 749 u_long fr_ppkl; /* packets allowed and logged */ 750 u_long fr_bpkl; /* packets denied and logged */ 751 u_long fr_npkl; /* packets unmatched and logged */ 752 u_long fr_pkl; /* packets logged */ 753 u_long fr_skip; /* packets to be logged but buffer full */ 754 u_long fr_ret; /* packets for which a return is sent */ 755 u_long fr_acct; /* packets for which counting was performed */ 756 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 757 u_long fr_nfr; /* new fragment state kept */ 758 u_long fr_cfr; /* add new fragment state but complete pkt */ 759 u_long fr_bads; /* bad attempts to allocate packet state */ 760 u_long fr_ads; /* new packet state kept */ 761 u_long fr_chit; /* cached hit */ 762 u_long fr_tcpbad; /* TCP checksum check failures */ 763 u_long fr_pull[2]; /* good and bad pullup attempts */ 764 u_long fr_badsrc; /* source received doesn't match route */ 765 u_long fr_badttl; /* TTL in packet doesn't reach minimum */ 766 u_long fr_bad; /* bad IP packets to the filter */ 767 u_long fr_ipv6; /* IPv6 packets in/out */ 768 u_long fr_ppshit; /* dropped because of pps ceiling */ 769 u_long fr_ipud; /* IP id update failures */ 770 } filterstats_t; 771 772 /* 773 * Log structure. Each packet header logged is prepended by one of these. 774 * Following this in the log records read from the device will be an ipflog 775 * structure which is then followed by any packet data. 776 */ 777 typedef struct iplog { 778 u_32_t ipl_magic; 779 u_int ipl_count; 780 struct timeval ipl_time; 781 size_t ipl_dsize; 782 struct iplog *ipl_next; 783 } iplog_t; 784 785 #define ipl_sec ipl_time.tv_sec 786 #define ipl_usec ipl_time.tv_usec 787 788 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 789 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 790 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 791 #define IPLOG_SIZE sizeof(iplog_t) 792 793 typedef struct ipflog { 794 #if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 795 (defined(OpenBSD) && (OpenBSD >= 199603)) 796 #else 797 u_int fl_unit; 798 #endif 799 u_32_t fl_rule; 800 u_32_t fl_flags; 801 u_32_t fl_lflags; 802 u_32_t fl_logtag; 803 ipftag_t fl_nattag; 804 u_short fl_plen; /* extra data after hlen */ 805 u_short fl_loglevel; /* syslog log level */ 806 char fl_group[FR_GROUPLEN]; 807 u_char fl_hlen; /* length of IP headers saved */ 808 u_char fl_dir; 809 u_char fl_xxx[2]; /* pad */ 810 char fl_ifname[LIFNAMSIZ]; 811 } ipflog_t; 812 813 #ifndef IPF_LOGGING 814 # define IPF_LOGGING 0 815 #endif 816 #ifndef IPF_DEFAULT_PASS 817 # define IPF_DEFAULT_PASS FR_PASS 818 #endif 819 820 #define DEFAULT_IPFLOGSIZE 8192 821 #ifndef IPFILTER_LOGSIZE 822 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 823 #else 824 # if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE 825 # error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE 826 # endif 827 #endif 828 829 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 830 831 /* 832 * Device filenames for reading log information. Use ipf on Solaris2 because 833 * ipl is already a name used by something else. 834 */ 835 #ifndef IPL_NAME 836 # if SOLARIS 837 # define IPL_NAME "/dev/ipf" 838 # else 839 # define IPL_NAME "/dev/ipl" 840 # endif 841 #endif 842 /* 843 * Pathnames for various IP Filter control devices. Used by LKM 844 * and userland, so defined here. 845 */ 846 #define IPNAT_NAME "/dev/ipnat" 847 #define IPSTATE_NAME "/dev/ipstate" 848 #define IPAUTH_NAME "/dev/ipauth" 849 #define IPSYNC_NAME "/dev/ipsync" 850 #define IPSCAN_NAME "/dev/ipscan" 851 #define IPLOOKUP_NAME "/dev/iplookup" 852 853 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 854 #define IPL_LOGNAT 1 855 #define IPL_LOGSTATE 2 856 #define IPL_LOGAUTH 3 857 #define IPL_LOGSYNC 4 858 #define IPL_LOGSCAN 5 859 #define IPL_LOGLOOKUP 6 860 #define IPL_LOGCOUNT 7 861 #define IPL_LOGMAX 7 862 #define IPL_LOGSIZE IPL_LOGMAX + 1 863 #define IPL_LOGALL -1 864 #define IPL_LOGNONE -2 865 866 /* 867 * For SIOCGETFS 868 */ 869 typedef struct friostat { 870 struct filterstats f_st[2]; 871 struct frentry *f_ipf[2][2]; 872 struct frentry *f_acct[2][2]; 873 struct frentry *f_ipf6[2][2]; 874 struct frentry *f_acct6[2][2]; 875 struct frentry *f_auth; 876 struct frgroup *f_groups[IPL_LOGSIZE][2]; 877 u_long f_froute[2]; 878 u_long f_ticks; 879 int f_locks[IPL_LOGMAX]; 880 size_t f_kmutex_sz; 881 size_t f_krwlock_sz; 882 int f_defpass; /* default pass - from fr_pass */ 883 int f_active; /* 1 or 0 - active rule set */ 884 int f_running; /* 1 if running, else 0 */ 885 int f_logging; /* 1 if enabled, else 0 */ 886 int f_features; 887 char f_version[32]; /* version string */ 888 } friostat_t; 889 890 #define f_fin f_ipf[0] 891 #define f_fin6 f_ipf6[0] 892 #define f_fout f_ipf[1] 893 #define f_fout6 f_ipf6[1] 894 #define f_acctin f_acct[0] 895 #define f_acctin6 f_acct6[0] 896 #define f_acctout f_acct[1] 897 #define f_acctout6 f_acct6[1] 898 899 #define IPF_FEAT_LKM 0x001 900 #define IPF_FEAT_LOG 0x002 901 #define IPF_FEAT_LOOKUP 0x004 902 #define IPF_FEAT_BPF 0x008 903 #define IPF_FEAT_COMPILED 0x010 904 #define IPF_FEAT_CKSUM 0x020 905 #define IPF_FEAT_SYNC 0x040 906 #define IPF_FEAT_SCAN 0x080 907 #define IPF_FEAT_IPV6 0x100 908 909 typedef struct optlist { 910 u_short ol_val; 911 int ol_bit; 912 } optlist_t; 913 914 915 /* 916 * Group list structure. 917 */ 918 typedef struct frgroup { 919 struct frgroup *fg_next; 920 struct frentry *fg_head; 921 struct frentry *fg_start; 922 u_32_t fg_flags; 923 int fg_ref; 924 char fg_name[FR_GROUPLEN]; 925 } frgroup_t; 926 927 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 928 929 930 /* 931 * Used by state and NAT tables 932 */ 933 typedef struct icmpinfo { 934 u_short ici_id; 935 u_short ici_seq; 936 u_char ici_type; 937 } icmpinfo_t; 938 939 typedef struct udpinfo { 940 u_short us_sport; 941 u_short us_dport; 942 } udpinfo_t; 943 944 945 typedef struct tcpdata { 946 u_32_t td_end; 947 u_32_t td_maxend; 948 u_32_t td_maxwin; 949 u_32_t td_winscale; 950 u_32_t td_maxseg; 951 int td_winflags; 952 } tcpdata_t; 953 954 #define TCP_WSCALE_MAX 14 955 956 #define TCP_WSCALE_SEEN 0x00000001 957 #define TCP_WSCALE_FIRST 0x00000002 958 #define TCP_SACK_PERMIT 0x00000004 959 960 961 typedef struct tcpinfo { 962 u_short ts_sport; 963 u_short ts_dport; 964 tcpdata_t ts_data[2]; 965 } tcpinfo_t; 966 967 968 /* 969 * Structures to define a GRE header as seen in a packet. 970 */ 971 struct grebits { 972 u_32_t grb_C:1; 973 u_32_t grb_R:1; 974 u_32_t grb_K:1; 975 u_32_t grb_S:1; 976 u_32_t grb_s:1; 977 u_32_t grb_recur:1; 978 u_32_t grb_A:1; 979 u_32_t grb_flags:3; 980 u_32_t grb_ver:3; 981 u_short grb_ptype; 982 }; 983 984 typedef struct grehdr { 985 union { 986 struct grebits gru_bits; 987 u_short gru_flags; 988 } gr_un; 989 u_short gr_len; 990 u_short gr_call; 991 } grehdr_t; 992 993 #define gr_flags gr_un.gru_flags 994 #define gr_bits gr_un.gru_bits 995 #define gr_ptype gr_bits.grb_ptype 996 #define gr_C gr_bits.grb_C 997 #define gr_R gr_bits.grb_R 998 #define gr_K gr_bits.grb_K 999 #define gr_S gr_bits.grb_S 1000 #define gr_s gr_bits.grb_s 1001 #define gr_recur gr_bits.grb_recur 1002 #define gr_A gr_bits.grb_A 1003 #define gr_ver gr_bits.grb_ver 1004 1005 /* 1006 * GRE information tracked by "keep state" 1007 */ 1008 typedef struct greinfo { 1009 u_short gs_call[2]; 1010 u_short gs_flags; 1011 u_short gs_ptype; 1012 } greinfo_t; 1013 1014 #define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1015 1016 1017 /* 1018 * Format of an Authentication header 1019 */ 1020 typedef struct authhdr { 1021 u_char ah_next; 1022 u_char ah_plen; 1023 u_short ah_reserved; 1024 u_32_t ah_spi; 1025 u_32_t ah_seq; 1026 /* Following the sequence number field is 0 or more bytes of */ 1027 /* authentication data, as specified by ah_plen - RFC 2402. */ 1028 } authhdr_t; 1029 1030 1031 /* 1032 * Timeout tail queue list member 1033 */ 1034 typedef struct ipftqent { 1035 struct ipftqent **tqe_pnext; 1036 struct ipftqent *tqe_next; 1037 struct ipftq *tqe_ifq; 1038 void *tqe_parent; /* pointer back to NAT/state struct */ 1039 u_long tqe_die; /* when this entriy is to die */ 1040 u_long tqe_touched; 1041 int tqe_flags; 1042 int tqe_state[2]; /* current state of this entry */ 1043 } ipftqent_t; 1044 1045 #define TQE_RULEBASED 0x00000001 1046 1047 1048 /* 1049 * Timeout tail queue head for IPFilter 1050 */ 1051 typedef struct ipftq { 1052 ipfmutex_t ifq_lock; 1053 u_int ifq_ttl; 1054 ipftqent_t *ifq_head; 1055 ipftqent_t **ifq_tail; 1056 struct ipftq *ifq_next; 1057 struct ipftq **ifq_pnext; 1058 int ifq_ref; 1059 u_int ifq_flags; 1060 } ipftq_t; 1061 1062 #define IFQF_USER 0x01 /* User defined aging */ 1063 #define IFQF_DELETE 0x02 /* Marked for deletion */ 1064 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1065 1066 #define IPF_HZ_MULT 1 1067 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1068 /* checks its timeout queues. */ 1069 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1070 1071 typedef int (*ipftq_delete_fn_t)(void *); 1072 1073 /* 1074 * Structure to define address for pool lookups. 1075 */ 1076 typedef struct { 1077 u_char adf_len; 1078 i6addr_t adf_addr; 1079 } addrfamily_t; 1080 1081 1082 /* 1083 * Object structure description. For passing through in ioctls. 1084 */ 1085 typedef struct ipfobj { 1086 u_32_t ipfo_rev; /* IPFilter version number */ 1087 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1088 void *ipfo_ptr; /* pointer to object */ 1089 int ipfo_type; /* type of object being pointed to */ 1090 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1091 u_char ipfo_xxxpad[32]; /* reserved for future use */ 1092 } ipfobj_t; 1093 1094 #define IPFOBJ_FRENTRY 0 /* struct frentry */ 1095 #define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1096 #define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1097 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1098 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1099 #define IPFOBJ_IPNAT 5 /* struct ipnat */ 1100 #define IPFOBJ_NATSTAT 6 /* struct natstat */ 1101 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1102 #define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1103 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1104 #define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1105 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1106 #define IPFOBJ_FRAUTH 12 /* struct frauth */ 1107 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1108 #define IPFOBJ_NAT 14 /* struct nat */ 1109 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1110 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1111 #define IPFOBJ_GTABLE 17 /* struct ipftable */ 1112 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1113 #define IPFOBJ_STATETQTAB 19 /* struct ipftq [NSTATES] */ 1114 #define IPFOBJ_COUNT 20 /* How many #defines are above this? */ 1115 1116 1117 typedef union ipftunevalptr { 1118 void *ipftp_void; 1119 u_long *ipftp_long; 1120 u_int *ipftp_int; 1121 u_short *ipftp_short; 1122 u_char *ipftp_char; 1123 } ipftunevalptr_t; 1124 1125 typedef struct ipftuneable { 1126 ipftunevalptr_t ipft_una; 1127 const char *ipft_name; 1128 u_long ipft_min; 1129 u_long ipft_max; 1130 int ipft_sz; 1131 int ipft_flags; 1132 struct ipftuneable *ipft_next; 1133 } ipftuneable_t; 1134 1135 #define ipft_addr ipft_una.ipftp_void 1136 #define ipft_plong ipft_una.ipftp_long 1137 #define ipft_pint ipft_una.ipftp_int 1138 #define ipft_pshort ipft_una.ipftp_short 1139 #define ipft_pchar ipft_una.ipftp_char 1140 1141 #define IPFT_RDONLY 1 /* read-only */ 1142 #define IPFT_WRDISABLED 2 /* write when disabled only */ 1143 1144 typedef union ipftuneval { 1145 u_long ipftu_long; 1146 u_int ipftu_int; 1147 u_short ipftu_short; 1148 u_char ipftu_char; 1149 } ipftuneval_t; 1150 1151 typedef struct ipftune { 1152 void *ipft_cookie; 1153 ipftuneval_t ipft_un; 1154 u_long ipft_min; 1155 u_long ipft_max; 1156 int ipft_sz; 1157 int ipft_flags; 1158 char ipft_name[80]; 1159 } ipftune_t; 1160 1161 #define ipft_vlong ipft_un.ipftu_long 1162 #define ipft_vint ipft_un.ipftu_int 1163 #define ipft_vshort ipft_un.ipftu_short 1164 #define ipft_vchar ipft_un.ipftu_char 1165 1166 /* 1167 * 1168 */ 1169 typedef struct ipfruleiter { 1170 int iri_inout; 1171 char iri_group[FR_GROUPLEN]; 1172 int iri_active; 1173 int iri_nrules; 1174 int iri_v; 1175 frentry_t *iri_rule; 1176 } ipfruleiter_t; 1177 1178 /* 1179 * Values for iri_inout 1180 */ 1181 #define F_IN 0 1182 #define F_OUT 1 1183 #define F_ACIN 2 1184 #define F_ACOUT 3 1185 1186 1187 typedef struct ipfgeniter { 1188 int igi_type; 1189 int igi_nitems; 1190 void *igi_data; 1191 } ipfgeniter_t; 1192 1193 #define IPFGENITER_IPF 0 1194 #define IPFGENITER_NAT 1 1195 #define IPFGENITER_IPNAT 2 1196 #define IPFGENITER_FRAG 3 1197 #define IPFGENITER_AUTH 4 1198 #define IPFGENITER_STATE 5 1199 #define IPFGENITER_NATFRAG 6 1200 #define IPFGENITER_HOSTMAP 7 1201 #define IPFGENITER_LOOKUP 8 1202 1203 typedef struct ipftable { 1204 int ita_type; 1205 void *ita_table; 1206 } ipftable_t; 1207 1208 #define IPFTABLE_BUCKETS 1 1209 #define IPFTABLE_BUCKETS_NATIN 2 1210 #define IPFTABLE_BUCKETS_NATOUT 3 1211 1212 1213 /* 1214 * 1215 */ 1216 typedef struct ipftoken { 1217 struct ipftoken *ipt_next; 1218 struct ipftoken **ipt_pnext; 1219 void *ipt_ctx; 1220 void *ipt_data; 1221 u_long ipt_die; 1222 int ipt_type; 1223 int ipt_uid; 1224 int ipt_subtype; 1225 int ipt_alive; 1226 } ipftoken_t; 1227 1228 1229 /* 1230 ** HPUX Port 1231 */ 1232 #ifdef __hpux 1233 /* HP-UX locking sequence deadlock detection module lock MAJOR ID */ 1234 # define IPF_SMAJ 0 /* temp assignment XXX, not critical */ 1235 #endif 1236 1237 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1238 (__FreeBSD_version >= 220000) 1239 # define CDEV_MAJOR 79 1240 #endif 1241 1242 /* 1243 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns 1244 * on those hooks. We don't need any special mods in non-IP Filter code 1245 * with this! 1246 */ 1247 #if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \ 1248 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \ 1249 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043)) 1250 # if defined(NetBSD) && (NetBSD >= 199905) 1251 # define PFIL_HOOKS 1252 # endif 1253 # ifdef PFIL_HOOKS 1254 # define NETBSD_PF 1255 # endif 1256 #endif 1257 1258 #ifdef _KERNEL 1259 # define FR_VERBOSE(verb_pr) 1260 # define FR_DEBUG(verb_pr) 1261 #else 1262 extern void debug __P((char *, ...)); 1263 extern void verbose __P((char *, ...)); 1264 # define FR_VERBOSE(verb_pr) verbose verb_pr 1265 # define FR_DEBUG(verb_pr) debug verb_pr 1266 #endif 1267 1268 1269 #ifndef _KERNEL 1270 extern int fr_check __P((struct ip *, int, void *, int, mb_t **)); 1271 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **)); 1272 extern int ipf_log __P((void)); 1273 extern struct ifnet *get_unit __P((char *, int)); 1274 extern char *get_ifname __P((struct ifnet *)); 1275 # if defined(__NetBSD__) || defined(__OpenBSD__) || \ 1276 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) 1277 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int)); 1278 # else 1279 extern int iplioctl __P((int, ioctlcmd_t, caddr_t, int)); 1280 # endif 1281 extern int iplopen __P((dev_t, int)); 1282 extern int iplclose __P((dev_t, int)); 1283 extern void m_freem __P((mb_t *)); 1284 extern int bcopywrap __P((void *, void *, size_t)); 1285 #else /* #ifndef _KERNEL */ 1286 # ifdef BSD 1287 # if (defined(__NetBSD__) && (__NetBSD_Version__ < 399000000)) || \ 1288 defined(__osf__) || \ 1289 (defined(__FreeBSD_version) && (__FreeBSD_version < 500043)) 1290 # include <sys/select.h> 1291 # else 1292 # include <sys/selinfo.h> 1293 # endif 1294 extern struct selinfo ipfselwait[IPL_LOGSIZE]; 1295 # endif 1296 # if defined(__NetBSD__) && defined(PFIL_HOOKS) 1297 extern void ipfilterattach __P((int)); 1298 # endif 1299 extern int ipl_enable __P((void)); 1300 extern int ipl_disable __P((void)); 1301 extern int ipf_inject __P((fr_info_t *, mb_t *)); 1302 # ifdef MENTAT 1303 extern int fr_check __P((struct ip *, int, void *, int, void *, 1304 mblk_t **)); 1305 # if SOLARIS 1306 # if SOLARIS2 >= 7 1307 extern int iplioctl __P((dev_t, int, intptr_t, int, cred_t *, int *)); 1308 # else 1309 extern int iplioctl __P((dev_t, int, int *, int, cred_t *, int *)); 1310 # endif 1311 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1312 extern int iplclose __P((dev_t, int, int, cred_t *)); 1313 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1314 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1315 # endif 1316 # ifdef __hpux 1317 extern int iplopen __P((dev_t, int, intptr_t, int)); 1318 extern int iplclose __P((dev_t, int, int)); 1319 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1320 extern int iplread __P((dev_t, uio_t *)); 1321 extern int iplwrite __P((dev_t, uio_t *)); 1322 extern int iplselect __P((dev_t, int)); 1323 # endif 1324 extern int fr_qout __P((queue_t *, mblk_t *)); 1325 # else /* MENTAT */ 1326 extern int fr_check __P((struct ip *, int, void *, int, mb_t **)); 1327 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **)); 1328 extern size_t mbufchainlen __P((mb_t *)); 1329 # ifdef __sgi 1330 # include <sys/cred.h> 1331 extern int iplioctl __P((dev_t, int, caddr_t, int, cred_t *, int *)); 1332 extern int iplopen __P((dev_t *, int, int, cred_t *)); 1333 extern int iplclose __P((dev_t, int, int, cred_t *)); 1334 extern int iplread __P((dev_t, uio_t *, cred_t *)); 1335 extern int iplwrite __P((dev_t, uio_t *, cred_t *)); 1336 extern int ipfilter_sgi_attach __P((void)); 1337 extern void ipfilter_sgi_detach __P((void)); 1338 extern void ipfilter_sgi_intfsync __P((void)); 1339 # else 1340 # ifdef IPFILTER_LKM 1341 extern int iplidentify __P((char *)); 1342 # endif 1343 # if (defined(_BSDI_VERSION) && _BSDI_VERSION >= 199510) || \ 1344 (__FreeBSD_version >= 220000) || \ 1345 (NetBSD >= 199511) || defined(__OpenBSD__) 1346 # if defined(__NetBSD__) || \ 1347 (defined(_BSDI_VERSION) && _BSDI_VERSION >= 199701) || \ 1348 defined(__OpenBSD__) || (__FreeBSD_version >= 300000) 1349 # if (__FreeBSD_version >= 500024) 1350 # if (__FreeBSD_version >= 502116) 1351 extern int iplioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *)); 1352 # else 1353 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct thread *)); 1354 # endif /* __FreeBSD_version >= 502116 */ 1355 # else 1356 # if (__NetBSD_Version__ >= 499001000) 1357 extern int iplioctl __P((dev_t, u_long, void *, int, struct lwp *)); 1358 # else 1359 # if (__NetBSD_Version__ >= 399001400) 1360 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct lwp *)); 1361 # else 1362 extern int iplioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 1363 # endif 1364 # endif 1365 # endif /* __FreeBSD_version >= 500024 */ 1366 # else 1367 extern int iplioctl __P((dev_t, int, caddr_t, int, struct thread *)); 1368 # endif 1369 # if (__FreeBSD_version >= 500024) 1370 # if (__FreeBSD_version >= 502116) 1371 extern int iplopen __P((struct cdev*, int, int, struct thread *)); 1372 extern int iplclose __P((struct cdev*, int, int, struct thread *)); 1373 # else 1374 extern int iplopen __P((dev_t, int, int, struct thread *)); 1375 extern int iplclose __P((dev_t, int, int, struct thread *)); 1376 # endif /* __FreeBSD_version >= 502116 */ 1377 # else 1378 # if (__NetBSD_Version__ >= 399001400) 1379 extern int iplopen __P((dev_t, int, int, struct lwp *)); 1380 extern int iplclose __P((dev_t, int, int, struct lwp *)); 1381 # else 1382 extern int iplopen __P((dev_t, int, int, struct proc *)); 1383 extern int iplclose __P((dev_t, int, int, struct proc *)); 1384 # endif /* __NetBSD_Version__ >= 399001400 */ 1385 # endif /* __FreeBSD_version >= 500024 */ 1386 # else 1387 # ifdef linux 1388 extern int iplioctl __P((struct inode *, struct file *, u_int, u_long)); 1389 # else 1390 extern int iplopen __P((dev_t, int)); 1391 extern int iplclose __P((dev_t, int)); 1392 extern int iplioctl __P((dev_t, int, caddr_t, int)); 1393 # endif 1394 # endif /* (_BSDI_VERSION >= 199510) */ 1395 # if BSD >= 199306 1396 # if (__FreeBSD_version >= 502116) 1397 extern int iplread __P((struct cdev*, struct uio *, int)); 1398 extern int iplwrite __P((struct cdev*, struct uio *, int)); 1399 # else 1400 extern int iplread __P((dev_t, struct uio *, int)); 1401 extern int iplwrite __P((dev_t, struct uio *, int)); 1402 # endif /* __FreeBSD_version >= 502116 */ 1403 # else 1404 # ifndef linux 1405 extern int iplread __P((dev_t, struct uio *)); 1406 extern int iplwrite __P((dev_t, struct uio *)); 1407 # endif 1408 # endif /* BSD >= 199306 */ 1409 # endif /* __ sgi */ 1410 # endif /* MENTAT */ 1411 1412 # if defined(__FreeBSD_version) 1413 extern int ipf_pfil_hook __P((void)); 1414 extern int ipf_pfil_unhook __P((void)); 1415 extern void ipf_event_reg __P((void)); 1416 extern void ipf_event_dereg __P((void)); 1417 # endif 1418 1419 #endif /* #ifndef _KERNEL */ 1420 1421 extern ipfmutex_t ipl_mutex, ipf_authmx, ipf_rw, ipf_hostmap; 1422 extern ipfmutex_t ipf_timeoutlock, ipf_stinsert, ipf_natio, ipf_nat_new; 1423 extern ipfrwlock_t ipf_mutex, ipf_global, ip_poolrw, ipf_ipidfrag; 1424 extern ipfrwlock_t ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_auth; 1425 extern ipfrwlock_t ipf_frcache, ipf_tokens; 1426 1427 extern char *memstr __P((const char *, char *, size_t, size_t)); 1428 extern int count4bits __P((u_32_t)); 1429 extern int frrequest __P((int, ioctlcmd_t, caddr_t, int, int)); 1430 extern char *getifname __P((struct ifnet *)); 1431 extern int ipfattach __P((void)); 1432 extern int ipfdetach __P((void)); 1433 extern u_short ipf_cksum __P((u_short *, int)); 1434 extern int copyinptr __P((void *, void *, size_t)); 1435 extern int copyoutptr __P((void *, void *, size_t)); 1436 extern int fr_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *)); 1437 extern int fr_inobj __P((void *, void *, int)); 1438 extern int fr_inobjsz __P((void *, void *, int, int)); 1439 extern int fr_ioctlswitch __P((int, void *, ioctlcmd_t, int, int, void *)); 1440 extern int fr_ipf_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *)); 1441 extern int fr_ipftune __P((ioctlcmd_t, void *)); 1442 extern int fr_outobj __P((void *, void *, int)); 1443 extern int fr_outobjsz __P((void *, void *, int, int)); 1444 extern void *fr_pullup __P((mb_t *, fr_info_t *, int)); 1445 extern void fr_resolvedest __P((struct frdest *, int)); 1446 extern int fr_resolvefunc __P((void *)); 1447 extern void *fr_resolvenic __P((char *, int)); 1448 extern int fr_send_icmp_err __P((int, fr_info_t *, int)); 1449 extern int fr_send_reset __P((fr_info_t *)); 1450 #if (__FreeBSD_version < 501000) || !defined(_KERNEL) 1451 extern int ppsratecheck __P((struct timeval *, int *, int)); 1452 #endif 1453 extern ipftq_t *fr_addtimeoutqueue __P((ipftq_t **, u_int)); 1454 extern void fr_deletequeueentry __P((ipftqent_t *)); 1455 extern int fr_deletetimeoutqueue __P((ipftq_t *)); 1456 extern void fr_freetimeoutqueue __P((ipftq_t *)); 1457 extern void fr_movequeue __P((ipftqent_t *, ipftq_t *, ipftq_t *)); 1458 extern void fr_queueappend __P((ipftqent_t *, ipftq_t *, void *)); 1459 extern void fr_queueback __P((ipftqent_t *)); 1460 extern void fr_queuefront __P((ipftqent_t *)); 1461 extern void fr_checkv4sum __P((fr_info_t *)); 1462 extern int fr_checkl4sum __P((fr_info_t *)); 1463 extern int fr_ifpfillv4addr __P((int, struct sockaddr_in *, 1464 struct sockaddr_in *, struct in_addr *, 1465 struct in_addr *)); 1466 extern int fr_coalesce __P((fr_info_t *)); 1467 #ifdef USE_INET6 1468 extern void fr_checkv6sum __P((fr_info_t *)); 1469 extern int fr_ifpfillv6addr __P((int, struct sockaddr_in6 *, 1470 struct sockaddr_in6 *, struct in_addr *, 1471 struct in_addr *)); 1472 #endif 1473 1474 extern int fr_addipftune __P((ipftuneable_t *)); 1475 extern int fr_delipftune __P((ipftuneable_t *)); 1476 1477 extern int frflush __P((minor_t, int, int)); 1478 extern void frsync __P((void *)); 1479 extern frgroup_t *fr_addgroup __P((char *, void *, u_32_t, minor_t, int)); 1480 extern int fr_derefrule __P((frentry_t **)); 1481 extern void fr_delgroup __P((char *, minor_t, int)); 1482 extern frgroup_t *fr_findgroup __P((char *, minor_t, int, frgroup_t ***)); 1483 1484 extern int fr_loginit __P((void)); 1485 extern int ipflog_canread __P((int)); 1486 extern int ipflog_clear __P((minor_t)); 1487 extern int ipflog_read __P((minor_t, uio_t *)); 1488 extern int ipflog __P((fr_info_t *, u_int)); 1489 extern int ipllog __P((int, fr_info_t *, void **, size_t *, int *, int)); 1490 extern void fr_logunload __P((void)); 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 *, int)); 1495 extern void fr_deinitialise __P((void)); 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 *)); 1500 extern frentry_t *fr_getrulen __P((int, char *, u_32_t)); 1501 extern void fr_getstat __P((struct friostat *)); 1502 extern int fr_ifpaddr __P((int, int, void *, 1503 struct in_addr *, struct in_addr *)); 1504 extern int fr_initialise __P((void)); 1505 extern int fr_lock __P((caddr_t, int *)); 1506 extern int fr_makefrip __P((int, ip_t *, fr_info_t *)); 1507 extern int fr_matchtag __P((ipftag_t *, ipftag_t *)); 1508 extern int fr_matchicmpqueryreply __P((int, icmpinfo_t *, 1509 struct icmp *, int)); 1510 extern u_32_t fr_newisn __P((fr_info_t *)); 1511 extern u_short fr_nextipid __P((fr_info_t *)); 1512 extern int ipf_queueflush __P((ipftq_delete_fn_t, ipftq_t *, ipftq_t *)); 1513 extern int fr_rulen __P((int, frentry_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((void *)); 1519 extern ipftoken_t *ipf_findtoken __P((int, int, void *)); 1520 extern int ipf_getnextrule __P((ipftoken_t *, void *)); 1521 extern void ipf_expiretokens __P((void)); 1522 extern void ipf_freetoken __P((ipftoken_t *)); 1523 extern int ipf_deltoken __P((int,int, void *)); 1524 extern int ipfsync __P((void)); 1525 extern int ipf_genericiter __P((void *, int, void *)); 1526 #ifndef ipf_random 1527 extern u_32_t ipf_random __P((void)); 1528 #endif 1529 #ifdef NEED_LOCAL_RAND 1530 extern void ipf_rand_push __P((void *, int)); 1531 #endif 1532 1533 extern int fr_running; 1534 extern u_long fr_frouteok[2]; 1535 extern int fr_pass; 1536 extern int fr_flags; 1537 extern int fr_active; 1538 extern int fr_chksrc; 1539 extern int fr_minttl; 1540 extern int fr_refcnt; 1541 extern int fr_control_forwarding; 1542 extern int fr_update_ipid; 1543 extern int nat_logging; 1544 extern int ipstate_logging; 1545 extern int ipl_suppress; 1546 extern int ipl_logmax; 1547 extern int ipl_logall; 1548 extern int ipl_logsize; 1549 extern u_long fr_ticks; 1550 extern fr_info_t frcache[2][8]; 1551 extern char ipfilter_version[]; 1552 extern iplog_t **iplh[IPL_LOGMAX+1], *iplt[IPL_LOGMAX+1]; 1553 extern int iplused[IPL_LOGMAX + 1]; 1554 extern struct frentry *ipfilter[2][2], *ipacct[2][2]; 1555 #ifdef USE_INET6 1556 extern struct frentry *ipfilter6[2][2], *ipacct6[2][2]; 1557 extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1558 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1559 extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1560 #endif 1561 extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1562 extern struct frgroup *ipfgroups[IPL_LOGSIZE][2]; 1563 extern struct filterstats frstats[]; 1564 extern frentry_t *ipfrule_match __P((fr_info_t *)); 1565 extern u_char ipf_iss_secret[32]; 1566 extern ipftuneable_t ipf_tuneables[]; 1567 1568 #endif /* __IP_FIL_H__ */ 1569