1/* $NetBSD: ip_fil.h,v 1.19 2010/04/17 21:00:44 darrenr Exp $ */ 2 3/* 4 * Copyright (C) 1993-2001, 2003 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 * 8 * @(#)ip_fil.h 1.35 6/5/96 9 * Id: ip_fil.h,v 2.170.2.63 2010/01/31 16:22:55 darrenr Exp 10 */ 11 12#ifndef _NETINET_IP_FIL_H_ 13#define _NETINET_IP_FIL_H_ 14 15#include "netinet/ip_compat.h" 16 17#ifndef SOLARIS 18# define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 19#endif 20 21#if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 22# define SIOCADAFR _IOW('r', 60, struct ipfobj) 23# define SIOCRMAFR _IOW('r', 61, struct ipfobj) 24# define SIOCSETFF _IOW('r', 62, u_int) 25# define SIOCGETFF _IOR('r', 63, u_int) 26# define SIOCGETFS _IOWR('r', 64, struct ipfobj) 27# define SIOCIPFFL _IOWR('r', 65, int) 28# define SIOCIPFFB _IOR('r', 66, int) 29# define SIOCADIFR _IOW('r', 67, struct ipfobj) 30# define SIOCRMIFR _IOW('r', 68, struct ipfobj) 31# define SIOCSWAPA _IOR('r', 69, u_int) 32# define SIOCINAFR _IOW('r', 70, struct ipfobj) 33# define SIOCINIFR _IOW('r', 71, struct ipfobj) 34# define SIOCFRENB _IOW('r', 72, u_int) 35# define SIOCFRSYN _IOW('r', 73, u_int) 36# define SIOCFRZST _IOWR('r', 74, struct ipfobj) 37# define SIOCZRLST _IOWR('r', 75, struct ipfobj) 38# define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 39# define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 40# define SIOCSTAT1 _IOWR('r', 78, struct ipfobj) 41# define SIOCSTLCK _IOWR('r', 79, u_int) 42# define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 43# define SIOCSTGET _IOWR('r', 81, struct ipfobj) 44# define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 45# define SIOCSTAT2 _IOWR('r', 83, struct ipfobj) 46# define SIOCSETLG _IOWR('r', 84, int) 47# define SIOCGETLG _IOWR('r', 85, int) 48# define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 49# define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 50# define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 51# define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 52# define SIOCIPFL6 _IOWR('r', 90, int) 53# define SIOCIPFITER _IOWR('r', 91, struct ipfobj) 54# define SIOCGENITER _IOWR('r', 92, struct ipfobj) 55# define SIOCGTABL _IOWR('r', 93, struct ipfobj) 56# define SIOCIPFDELTOK _IOWR('r', 94, int) 57# define SIOCLOOKUPITER _IOWR('r', 95, struct ipfobj) 58# define SIOCGTQTAB _IOWR('r', 96, struct ipfobj) 59#else 60# define SIOCADAFR _IOW(r, 60, struct ipfobj) 61# define SIOCRMAFR _IOW(r, 61, struct ipfobj) 62# define SIOCSETFF _IOW(r, 62, u_int) 63# define SIOCGETFF _IOR(r, 63, u_int) 64# define SIOCGETFS _IOWR(r, 64, struct ipfobj) 65# define SIOCIPFFL _IOWR(r, 65, int) 66# define SIOCIPFFB _IOR(r, 66, int) 67# define SIOCADIFR _IOW(r, 67, struct ipfobj) 68# define SIOCRMIFR _IOW(r, 68, struct ipfobj) 69# define SIOCSWAPA _IOR(r, 69, u_int) 70# define SIOCINAFR _IOW(r, 70, struct ipfobj) 71# define SIOCINIFR _IOW(r, 71, struct ipfobj) 72# define SIOCFRENB _IOW(r, 72, u_int) 73# define SIOCFRSYN _IOW(r, 73, u_int) 74# define SIOCFRZST _IOWR(r, 74, struct ipfobj) 75# define SIOCZRLST _IOWR(r, 75, struct ipfobj) 76# define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 77# define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 78# define SIOCSTAT1 _IOWR(r, 78, struct ipfobj) 79# define SIOCSTLCK _IOWR(r, 79, u_int) 80# define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 81# define SIOCSTGET _IOWR(r, 81, struct ipfobj) 82# define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 83# define SIOCSTAT2 _IOWR(r, 83, struct ipfobj) 84# define SIOCSETLG _IOWR(r, 84, int) 85# define SIOCGETLG _IOWR(r, 85, int) 86# define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 87# define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 88# define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 89# define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 90# define SIOCIPFL6 _IOWR(r, 90, int) 91# define SIOCIPFITER _IOWR(r, 91, struct ipfobj) 92# define SIOCGENITER _IOWR(r, 92, struct ipfobj) 93# define SIOCGTABL _IOWR(r, 93, struct ipfobj) 94# define SIOCIPFDELTOK _IOWR(r, 94, int) 95# define SIOCLOOKUPITER _IOWR(r, 95, struct ipfobj) 96# define SIOCGTQTAB _IOWR(r, 96, struct ipfobj) 97#endif 98#define SIOCADDFR SIOCADAFR 99#define SIOCDELFR SIOCRMAFR 100#define SIOCINSFR SIOCINAFR 101#define SIOCATHST SIOCSTAT1 102#define SIOCGFRST SIOCSTAT2 103 104 105struct ipscan; 106struct ifnet; 107 108 109typedef int (* lookupfunc_t)(void *, int, void *); 110 111/* 112 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 113 * as other types of objects, depending on its qualifier. 114 */ 115#ifdef USE_INET6 116typedef union i6addr { 117 u_32_t i6[4]; 118 struct in_addr in4; 119 struct in6_addr in6; 120 void *vptr[2]; 121 lookupfunc_t lptr[2]; 122 struct { 123 u_short type; 124 u_short subtype; 125 char label[12]; 126 } i6un; 127} i6addr_t; 128#else 129typedef union i6addr { 130 u_32_t i6[4]; 131 struct in_addr in4; 132 void *vptr[2]; 133 lookupfunc_t lptr[2]; 134 struct { 135 u_short type; 136 u_short subtype; 137 char label[12]; 138 } i6un; 139} i6addr_t; 140#endif 141 142#define in4_addr in4.s_addr 143#define iplookupnum i6[1] 144#define iplookupname i6un.label 145#define iplookuptype i6un.type 146#define iplookupsubtype i6un.subtype 147/* 148 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 149 */ 150#define iplookupptr vptr[0] 151#define iplookupfunc lptr[1] 152 153/* Avoid casting to a type presuming 64-bit alignment. */ 154#define I60(x) (((u_32_t *)(x))[0]) 155#define I61(x) (((u_32_t *)(x))[1]) 156#define I62(x) (((u_32_t *)(x))[2]) 157#define I63(x) (((u_32_t *)(x))[3]) 158#define HI60(x) ntohl(((u_32_t *)(x))[0]) 159#define HI61(x) ntohl(((u_32_t *)(x))[1]) 160#define HI62(x) ntohl(((u_32_t *)(x))[2]) 161#define HI63(x) ntohl(((u_32_t *)(x))[3]) 162 163#define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 164 (I61(a) == I61(b)) && (I60(a) == I60(b))) 165#define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 166 (I61(a) != I61(b)) || (I60(a) != I60(b))) 167#define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 168#define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 169#define IP6_GT(a,b) (HI60(a) > HI60(b) || (HI60(a) == HI60(b) && \ 170 (HI61(a) > HI61(b) || (HI61(a) == HI61(b) && \ 171 (HI62(a) > HI62(b) || (HI62(a) == HI62(b) && \ 172 HI63(a) > HI63(b))))))) 173#define IP6_LT(a,b) (HI60(a) < HI60(b) || (HI60(a) == HI60(b) && \ 174 (HI61(a) < HI61(b) || (HI61(a) == HI61(b) && \ 175 (HI62(a) < HI62(b) || (HI62(a) == HI62(b) && \ 176 HI63(a) < HI63(b))))))) 177#define NLADD(n,x) htonl(ntohl(n) + (x)) 178#define IP6_INC(a) \ 179 { u_32_t *_i6 = (u_32_t *)(a); \ 180 _i6[3] = NLADD(_i6[3], 1); \ 181 if (_i6[3] == 0) { \ 182 _i6[2] = NLADD(_i6[2], 1); \ 183 if (_i6[2] == 0) { \ 184 _i6[1] = NLADD(_i6[1], 1); \ 185 if (_i6[1] == 0) { \ 186 _i6[0] = NLADD(_i6[0], 1); \ 187 } \ 188 } \ 189 } \ 190 } 191#define IP6_ADD(a,x,d) \ 192 { i6addr_t *_s = (i6addr_t *)(a); \ 193 i6addr_t *_d = (i6addr_t *)(d); \ 194 _d->i6[0] = NLADD(_s->i6[0], x); \ 195 if (ntohl(_d->i6[0]) < ntohl(_s->i6[0])) { \ 196 _d->i6[1] = NLADD(_d->i6[1], 1); \ 197 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 198 _d->i6[2] = NLADD(_d->i6[2], 1); \ 199 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 200 _d->i6[3] = NLADD(_d->i6[3], 1); \ 201 } \ 202 } \ 203 } \ 204 } 205#define IP6_AND(a,b,d) { i6addr_t *_s1 = (i6addr_t *)(a); \ 206 i6addr_t *_s2 = (i6addr_t *)(b); \ 207 i6addr_t *_d = (i6addr_t *)(d); \ 208 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 209 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 210 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 211 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 212 } 213#define IP6_MERGE(a,b,c) \ 214 { i6addr_t *_d, *_s1, *_s2; \ 215 _d = (i6addr_t *)(a); \ 216 _s1 = (i6addr_t *)(b); \ 217 _s2 = (i6addr_t *)(c); \ 218 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 219 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 220 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 221 _d->i6[2] |= _s1->i6[3] & ~_s2->i6[3]; \ 222 } 223 224 225typedef struct fr_ip { 226 u_32_t fi_v:4; /* IP version */ 227 u_32_t fi_xx:4; /* spare */ 228 u_32_t fi_tos:8; /* IP packet TOS */ 229 u_32_t fi_ttl:8; /* IP packet TTL */ 230 u_32_t fi_p:8; /* IP packet protocol */ 231 u_32_t fi_optmsk; /* bitmask composed from IP options */ 232 i6addr_t fi_src; /* source address from packet */ 233 i6addr_t fi_dst; /* destination address from packet */ 234 u_short fi_secmsk; /* bitmask composed from IP security options */ 235 u_short fi_auth; /* authentication code from IP sec. options */ 236 u_32_t fi_flx; /* packet flags */ 237 u_32_t fi_tcpmsk; /* TCP options set/reset */ 238 u_32_t fi_res1; /* RESERVED */ 239} fr_ip_t; 240 241/* 242 * For use in fi_flx 243 */ 244#define FI_TCPUDP 0x0001 /* TCP/UCP implied comparison*/ 245#define FI_OPTIONS 0x0002 246#define FI_FRAG 0x0004 247#define FI_SHORT 0x0008 248#define FI_NATED 0x0010 249#define FI_MULTICAST 0x0020 250#define FI_BROADCAST 0x0040 251#define FI_MBCAST 0x0080 252#define FI_STATE 0x0100 253#define FI_BADNAT 0x0200 254#define FI_BAD 0x0400 255#define FI_OOW 0x0800 /* Out of state window, else match */ 256#define FI_ICMPERR 0x1000 257#define FI_FRAGBODY 0x2000 258#define FI_BADSRC 0x4000 259#define FI_LOWTTL 0x8000 260#define FI_CMP 0xcf03 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL,broadcast */ 261#define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 262#define FI_WITH 0xeffe /* Not FI_TCPUDP */ 263#define FI_V6EXTHDR 0x10000 264#define FI_COALESCE 0x20000 265#define FI_NEWNAT 0x40000 266#define FI_MOREFRAG 0x80000 267#define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 268#define FI_DONTCACHE 0x40000000 /* don't cache the result */ 269#define FI_IGNORE 0x80000000 270 271#define fi_saddr fi_src.in4.s_addr 272#define fi_daddr fi_dst.in4.s_addr 273#define fi_srcnum fi_src.iplookupnum 274#define fi_dstnum fi_dst.iplookupnum 275#define fi_srcname fi_src.iplookupname 276#define fi_dstname fi_dst.iplookupname 277#define fi_srctype fi_src.iplookuptype 278#define fi_dsttype fi_dst.iplookuptype 279#define fi_srcsubtype fi_src.iplookupsubtype 280#define fi_dstsubtype fi_dst.iplookupsubtype 281#define fi_srcptr fi_src.iplookupptr 282#define fi_dstptr fi_dst.iplookupptr 283#define fi_srcfunc fi_src.iplookupfunc 284#define fi_dstfunc fi_dst.iplookupfunc 285 286 287/* 288 * These are both used by the state and NAT code to indicate that one port or 289 * the other should be treated as a wildcard. 290 * NOTE: When updating, check bit masks in ip_state.h and update there too. 291 */ 292#define SI_W_SPORT 0x00000100 293#define SI_W_DPORT 0x00000200 294#define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 295#define SI_W_SADDR 0x00000400 296#define SI_W_DADDR 0x00000800 297#define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 298#define SI_NEWFR 0x00001000 299#define SI_CLONE 0x00002000 300#define SI_CLONED 0x00004000 301 302 303typedef struct fr_info { 304 void *fin_ifp; /* interface packet is `on' */ 305 fr_ip_t fin_fi; /* IP Packet summary */ 306 union { 307 u_short fid_16[2]; /* TCP/UDP ports, ICMP code/type */ 308 u_32_t fid_32; 309 } fin_dat; 310 int fin_out; /* in or out ? 1 == out, 0 == in */ 311 int fin_rev; /* state only: 1 = reverse */ 312 u_short fin_hlen; /* length of IP header in bytes */ 313 u_char fin_tcpf; /* TCP header flags (SYN, ACK, etc) */ 314 u_char fin_icode; /* ICMP error to return */ 315 u_32_t fin_rule; /* rule # last matched */ 316 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 317 struct frentry *fin_fr; /* last matching rule */ 318 void *fin_dp; /* start of data past IP header */ 319 int fin_dlen; /* length of data portion of packet */ 320 int fin_plen; 321 int fin_ipoff; /* # bytes from buffer start to hdr */ 322 u_short fin_id; /* IP packet id field */ 323 u_short fin_off; 324 int fin_depth; /* Group nesting depth */ 325 int fin_error; /* Error code to return */ 326 int fin_cksum; /* -1 bad, 1 good, 0 not done */ 327 u_int fin_pktnum; 328 void *fin_nattag; 329 void *fin_exthdr; 330 ip_t *fin_ip; 331 mb_t **fin_mp; /* pointer to pointer to mbuf */ 332 mb_t *fin_m; /* pointer to mbuf */ 333#ifdef MENTAT 334 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 335 void *fin_qpi; 336 char fin_ifname[LIFNAMSIZ]; 337#endif 338#ifdef __sgi 339 void *fin_hbuf; 340#endif 341} fr_info_t; 342 343#define fin_v fin_fi.fi_v 344#define fin_p fin_fi.fi_p 345#define fin_flx fin_fi.fi_flx 346#define fin_optmsk fin_fi.fi_optmsk 347#define fin_secmsk fin_fi.fi_secmsk 348#define fin_auth fin_fi.fi_auth 349#define fin_src fin_fi.fi_src.in4 350#define fin_src6 fin_fi.fi_src.in6 351#define fin_saddr fin_fi.fi_saddr 352#define fin_dst fin_fi.fi_dst.in4 353#define fin_dst6 fin_fi.fi_dst.in6 354#define fin_daddr fin_fi.fi_daddr 355#define fin_data fin_dat.fid_16 356#define fin_sport fin_dat.fid_16[0] 357#define fin_dport fin_dat.fid_16[1] 358#define fin_ports fin_dat.fid_32 359 360#define IPF_IN 0 361#define IPF_OUT 1 362 363typedef struct frentry *(*ipfunc_t)(fr_info_t *, u_32_t *); 364typedef int (*ipfuncinit_t)(struct frentry *); 365 366typedef struct ipfunc_resolve { 367 char ipfu_name[32]; 368 ipfunc_t ipfu_addr; 369 ipfuncinit_t ipfu_init; 370} ipfunc_resolve_t; 371 372/* 373 * Size for compares on fr_info structures 374 */ 375#define FI_CSIZE offsetof(fr_info_t, fin_icode) 376#define FI_LCSIZE offsetof(fr_info_t, fin_dp) 377 378/* 379 * Size for copying cache fr_info structure 380 */ 381#define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 382 383/* 384 * Structure for holding IPFilter's tag information 385 */ 386#define IPFTAG_LEN 16 387typedef struct { 388 union { 389 u_32_t iptu_num[4]; 390 char iptu_tag[IPFTAG_LEN]; 391 } ipt_un; 392 int ipt_not; 393} ipftag_t; 394 395#define ipt_tag ipt_un.iptu_tag 396#define ipt_num ipt_un.iptu_num 397 398 399/* 400 * This structure is used to hold information about the next hop for where 401 * to forward a packet. 402 */ 403typedef struct frdest { 404 void *fd_ifp; 405 i6addr_t fd_ip6; 406 char fd_ifname[LIFNAMSIZ]; 407} frdest_t; 408 409#define fd_ip fd_ip6.in4 410 411 412/* 413 * This structure holds information about a port comparison. 414 */ 415typedef struct frpcmp { 416 int frp_cmp; /* data for port comparisons */ 417 u_short frp_port; /* top port for <> and >< */ 418 u_short frp_top; /* top port for <> and >< */ 419} frpcmp_t; 420 421#define FR_NONE 0 422#define FR_EQUAL 1 423#define FR_NEQUAL 2 424#define FR_LESST 3 425#define FR_GREATERT 4 426#define FR_LESSTE 5 427#define FR_GREATERTE 6 428#define FR_OUTRANGE 7 429#define FR_INRANGE 8 430#define FR_INCRANGE 9 431 432/* 433 * Structure containing all the relevant TCP things that can be checked in 434 * a filter rule. 435 */ 436typedef struct frtuc { 437 u_char ftu_tcpfm; /* tcp flags mask */ 438 u_char ftu_tcpf; /* tcp flags */ 439 frpcmp_t ftu_src; 440 frpcmp_t ftu_dst; 441} frtuc_t; 442 443#define ftu_scmp ftu_src.frp_cmp 444#define ftu_dcmp ftu_dst.frp_cmp 445#define ftu_sport ftu_src.frp_port 446#define ftu_dport ftu_dst.frp_port 447#define ftu_stop ftu_src.frp_top 448#define ftu_dtop ftu_dst.frp_top 449 450#define FR_TCPFMAX 0x3f 451 452/* 453 * This structure makes up what is considered to be the IPFilter specific 454 * matching components of a filter rule, as opposed to the data structures 455 * used to define the result which are in frentry_t and not here. 456 */ 457typedef struct fripf { 458 fr_ip_t fri_ip; 459 fr_ip_t fri_mip; /* mask structure */ 460 461 u_short fri_icmpm; /* data for ICMP packets (mask) */ 462 u_short fri_icmp; 463 464 frtuc_t fri_tuc; 465 int fri_satype; /* addres type */ 466 int fri_datype; /* addres type */ 467 int fri_sifpidx; /* doing dynamic addressing */ 468 int fri_difpidx; /* index into fr_ifps[] to use when */ 469} fripf_t; 470 471#define fri_dlookup fri_mip.fi_dst 472#define fri_slookup fri_mip.fi_src 473#define fri_dstnum fri_mip.fi_dstnum 474#define fri_srcnum fri_mip.fi_srcnum 475#define fri_dstname fri_mip.fi_dstname 476#define fri_srcname fri_mip.fi_srcname 477#define fri_dstptr fri_mip.fi_dstptr 478#define fri_srcptr fri_mip.fi_srcptr 479 480#define FRI_NORMAL 0 /* Normal address */ 481#define FRI_DYNAMIC 1 /* dynamic address */ 482#define FRI_LOOKUP 2 /* address is a pool # */ 483#define FRI_RANGE 3 /* address/mask is a range */ 484#define FRI_NETWORK 4 /* network address from if */ 485#define FRI_BROADCAST 5 /* broadcast address from if */ 486#define FRI_PEERADDR 6 /* Peer address for P-to-P */ 487#define FRI_NETMASKED 7 /* network address with netmask from if */ 488 489 490typedef struct frentry * (* frentfunc_t)(fr_info_t *); 491 492typedef struct frentry { 493 ipfmutex_t fr_lock; 494 struct frentry *fr_next; 495 struct frentry **fr_grp; 496 struct ipscan *fr_isc; 497 void *fr_ifas[4]; 498 void *fr_ptr; /* for use with fr_arg */ 499 char *fr_comment; /* text comment for rule */ 500 int fr_ref; /* reference count - for grouping */ 501 int fr_statecnt; /* state count - for limit rules */ 502 /* 503 * The line number from a file is here because we need to be able to 504 * match the rule generated with ``grep rule ipf.conf | ipf -rf -'' 505 * with the rule loaded using ``ipf -f ipf.conf'' - thus it can't be 506 * on the other side of fr_func. 507 */ 508 int fr_flineno; /* line number from conf file */ 509 /* 510 * These are only incremented when a packet matches this rule and 511 * it is the last match 512 */ 513 U_QUAD_T fr_hits; 514 U_QUAD_T fr_bytes; 515 516 /* 517 * For PPS rate limiting 518 * fr_lpu is used to always have the same size for this field, 519 * allocating 64bits for seconds and 32bits for milliseconds. 520 */ 521 union { 522 struct timeval frp_lastpkt; 523 char frp_bytes[12]; 524 } fr_lpu; 525 int fr_curpps; 526 527 union { 528 void *fru_data; 529 void * fru_caddr; 530 fripf_t *fru_ipf; 531 frentfunc_t fru_func; 532 } fr_dun; 533 534 /* 535 * Fields after this may not change whilst in the kernel. 536 */ 537 ipfunc_t fr_func; /* call this function */ 538 int fr_dsize; 539 int fr_pps; 540 int fr_statemax; /* max reference count */ 541 u_32_t fr_type; 542 u_32_t fr_flags; /* per-rule flags && options (see below) */ 543 u_32_t fr_logtag; /* user defined log tag # */ 544 u_32_t fr_collect; /* collection number */ 545 u_int fr_arg; /* misc. numeric arg for rule */ 546 u_int fr_loglevel; /* syslog log facility + priority */ 547 u_int fr_age[2]; /* non-TCP timeouts */ 548 u_char fr_v; 549 u_char fr_icode; /* return ICMP code */ 550 char fr_group[FR_GROUPLEN]; /* group to which this rule belongs */ 551 char fr_grhead[FR_GROUPLEN]; /* group # which this rule starts */ 552 ipftag_t fr_nattag; 553 char fr_ifnames[4][LIFNAMSIZ]; 554 char fr_isctag[16]; 555 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 556 frdest_t fr_dif; /* duplicate packet interface */ 557 /* 558 * This must be last and will change after loaded into the kernel. 559 */ 560 u_int fr_cksum; /* checksum on filter rules for performance */ 561} frentry_t; 562 563#define fr_lastpkt fr_lpu.frp_lastpkt 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#define FR_CMPSIZ (sizeof(struct frentry) - \ 631 offsetof(struct frentry, fr_func)) 632 633/* 634 * fr_type 635 */ 636#define FR_T_NONE 0 637#define FR_T_IPF 1 /* IPF structures */ 638#define FR_T_BPFOPC 2 /* BPF opcode */ 639#define FR_T_CALLFUNC 3 /* callout to function in fr_func only */ 640#define FR_T_COMPIPF 4 /* compiled C code */ 641#define FR_T_BUILTIN 0x80000000 /* rule is in kernel space */ 642 643/* 644 * fr_flags 645 */ 646#define FR_CALL 0x00000 /* call rule */ 647#define FR_BLOCK 0x00001 /* do not allow packet to pass */ 648#define FR_PASS 0x00002 /* allow packet to pass */ 649#define FR_AUTH 0x00003 /* use authentication */ 650#define FR_PREAUTH 0x00004 /* require preauthentication */ 651#define FR_ACCOUNT 0x00005 /* Accounting rule */ 652#define FR_SKIP 0x00006 /* skip rule */ 653#define FR_DIVERT 0x00007 /* divert rule */ 654#define FR_CMDMASK 0x0000f 655#define FR_LOG 0x00010 /* Log */ 656#define FR_LOGB 0x00011 /* Log-fail */ 657#define FR_LOGP 0x00012 /* Log-pass */ 658#define FR_LOGMASK (FR_LOG|FR_CMDMASK) 659#define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 660#define FR_NOTSRCIP 0x00040 661#define FR_NOTDSTIP 0x00080 662#define FR_QUICK 0x00100 /* match & stop processing list */ 663#define FR_KEEPFRAG 0x00200 /* keep fragment information */ 664#define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 665#define FR_FASTROUTE 0x00800 /* bypass normal routing */ 666#define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 667#define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 668#define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 669#define FR_OUTQUE 0x04000 /* outgoing packets */ 670#define FR_INQUE 0x08000 /* ingoing packets */ 671#define FR_LOGBODY 0x10000 /* Log the body */ 672#define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 673#define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 674#define FR_DUP 0x80000 /* duplicate packet */ 675#define FR_FRSTRICT 0x100000 /* strict frag. cache */ 676#define FR_STSTRICT 0x200000 /* strict keep state */ 677#define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 678#define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 679#define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 680#define FR_NOMATCH 0x8000000 /* no match occured */ 681 /* 0x10000000 FF_LOGPASS */ 682 /* 0x20000000 FF_LOGBLOCK */ 683 /* 0x40000000 FF_LOGNOMATCH */ 684 /* 0x80000000 FF_BLOCKNONIP */ 685#define FR_COPIED 0x40000000 /* copied from user space */ 686#define FR_INACTIVE 0x80000000 /* only used when flush'ing rules */ 687 688#define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 689#define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 690#define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 691#define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 692#define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 693#define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 694#define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 695#define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 696#define FR_INOUT (FR_INQUE|FR_OUTQUE) 697 698/* 699 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 700 */ 701#define FF_LOGPASS 0x10000000 702#define FF_LOGBLOCK 0x20000000 703#define FF_LOGNOMATCH 0x40000000 704#define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 705#define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 706 707 708/* 709 * Structure that passes information on what/how to flush to the kernel. 710 */ 711typedef struct ipfflush { 712 int ipflu_how; 713 int ipflu_arg; 714} ipfflush_t; 715 716 717/* 718 * 719 */ 720typedef struct ipfgetctl { 721 u_int ipfg_min; /* min value */ 722 u_int ipfg_current; /* current value */ 723 u_int ipfg_max; /* max value */ 724 u_int ipfg_default; /* default value */ 725 u_int ipfg_steps; /* value increments */ 726 char ipfg_name[40]; /* tag name for this control */ 727} ipfgetctl_t; 728 729typedef struct ipfsetctl { 730 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 731 u_int ipfs_value; /* min value */ 732 char ipfs_name[40]; /* tag name for this control */ 733} ipfsetctl_t; 734 735 736/* 737 * Some of the statistics below are in their own counters, but most are kept 738 * in this single structure so that they can all easily be collected and 739 * copied back as required. 740 */ 741typedef struct filterstats { 742 u_long fr_pass; /* packets allowed */ 743 u_long fr_block; /* packets denied */ 744 u_long fr_nom; /* packets which don't match any rule */ 745 u_long fr_short; /* packets which are short */ 746 u_long fr_ppkl; /* packets allowed and logged */ 747 u_long fr_bpkl; /* packets denied and logged */ 748 u_long fr_npkl; /* packets unmatched and logged */ 749 u_long fr_pkl; /* packets logged */ 750 u_long fr_skip; /* packets to be logged but buffer full */ 751 u_long fr_ret; /* packets for which a return is sent */ 752 u_long fr_acct; /* packets for which counting was performed */ 753 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 754 u_long fr_nfr; /* new fragment state kept */ 755 u_long fr_cfr; /* add new fragment state but complete pkt */ 756 u_long fr_bads; /* bad attempts to allocate packet state */ 757 u_long fr_ads; /* new packet state kept */ 758 u_long fr_chit; /* cached hit */ 759 u_long fr_tcpbad; /* TCP checksum check failures */ 760 u_long fr_pull[2]; /* good and bad pullup attempts */ 761 u_long fr_badsrc; /* source received doesn't match route */ 762 u_long fr_badttl; /* TTL in packet doesn't reach minimum */ 763 u_long fr_bad; /* bad IP packets to the filter */ 764 u_long fr_ipv6; /* IPv6 packets in/out */ 765 u_long fr_ppshit; /* dropped because of pps ceiling */ 766 u_long fr_ipud; /* IP id update failures */ 767} filterstats_t; 768 769/* 770 * Log structure. Each packet header logged is prepended by one of these. 771 * Following this in the log records read from the device will be an ipflog 772 * structure which is then followed by any packet data. 773 */ 774typedef struct iplog { 775 u_32_t ipl_magic; 776 u_int ipl_count; 777 struct timeval ipl_time; 778 size_t ipl_dsize; 779 struct iplog *ipl_next; 780} iplog_t; 781 782#define ipl_sec ipl_time.tv_sec 783#define ipl_usec ipl_time.tv_usec 784 785#define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 786#define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 787#define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 788#define IPLOG_SIZE sizeof(iplog_t) 789 790typedef struct ipflog { 791#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 792 (defined(OpenBSD) && (OpenBSD >= 199603)) 793#else 794 u_int fl_unit; 795#endif 796 u_32_t fl_rule; 797 u_32_t fl_flags; 798 u_32_t fl_lflags; 799 u_32_t fl_logtag; 800 ipftag_t fl_nattag; 801 u_short fl_plen; /* extra data after hlen */ 802 u_short fl_loglevel; /* syslog log level */ 803 char fl_group[FR_GROUPLEN]; 804 u_char fl_hlen; /* length of IP headers saved */ 805 u_char fl_dir; 806 u_char fl_xxx[2]; /* pad */ 807 char fl_ifname[LIFNAMSIZ]; 808} ipflog_t; 809 810#ifndef IPF_LOGGING 811# define IPF_LOGGING 0 812#endif 813#ifndef IPF_DEFAULT_PASS 814# define IPF_DEFAULT_PASS FR_PASS 815#endif 816 817#define DEFAULT_IPFLOGSIZE 8192 818#ifndef IPFILTER_LOGSIZE 819# define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 820#else 821# if IPFILTER_LOGSIZE < DEFAULT_IPFLOGSIZE 822# error IPFILTER_LOGSIZE too small. Must be >= DEFAULT_IPFLOGSIZE 823# endif 824#endif 825 826#define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 827 828/* 829 * Device filenames for reading log information. Use ipf on Solaris2 because 830 * ipl is already a name used by something else. 831 */ 832#ifndef IPL_NAME 833# if SOLARIS 834# define IPL_NAME "/dev/ipf" 835# else 836# define IPL_NAME "/dev/ipl" 837# endif 838#endif 839/* 840 * Pathnames for various IP Filter control devices. Used by LKM 841 * and userland, so defined here. 842 */ 843#define IPNAT_NAME "/dev/ipnat" 844#define IPSTATE_NAME "/dev/ipstate" 845#define IPAUTH_NAME "/dev/ipauth" 846#define IPSYNC_NAME "/dev/ipsync" 847#define IPSCAN_NAME "/dev/ipscan" 848#define IPLOOKUP_NAME "/dev/iplookup" 849 850#define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 851#define IPL_LOGNAT 1 852#define IPL_LOGSTATE 2 853#define IPL_LOGAUTH 3 854#define IPL_LOGSYNC 4 855#define IPL_LOGSCAN 5 856#define IPL_LOGLOOKUP 6 857#define IPL_LOGCOUNT 7 858#define IPL_LOGMAX 7 859#define IPL_LOGSIZE IPL_LOGMAX + 1 860#define IPL_LOGALL -1 861#define IPL_LOGNONE -2 862 863/* 864 * For SIOCGETFS 865 */ 866typedef struct friostat { 867 struct filterstats f_st[2]; 868 struct frentry *f_ipf[2][2]; 869 struct frentry *f_acct[2][2]; 870 struct frentry *f_ipf6[2][2]; 871 struct frentry *f_acct6[2][2]; 872 struct frentry *f_auth; 873 struct frgroup *f_groups[IPL_LOGSIZE][2]; 874 u_long f_froute[2]; 875 u_long f_ticks; 876 int f_locks[IPL_LOGSIZE]; 877 size_t f_kmutex_sz; 878 size_t f_krwlock_sz; 879 int f_defpass; /* default pass - from fr_pass */ 880 int f_active; /* 1 or 0 - active rule set */ 881 int f_running; /* 1 if running, else 0 */ 882 int f_logging; /* 1 if enabled, else 0 */ 883 int f_features; 884 char f_version[32]; /* version string */ 885} friostat_t; 886 887#define f_fin f_ipf[0] 888#define f_fin6 f_ipf6[0] 889#define f_fout f_ipf[1] 890#define f_fout6 f_ipf6[1] 891#define f_acctin f_acct[0] 892#define f_acctin6 f_acct6[0] 893#define f_acctout f_acct[1] 894#define f_acctout6 f_acct6[1] 895 896#define IPF_FEAT_LKM 0x001 897#define IPF_FEAT_LOG 0x002 898#define IPF_FEAT_LOOKUP 0x004 899#define IPF_FEAT_BPF 0x008 900#define IPF_FEAT_COMPILED 0x010 901#define IPF_FEAT_CKSUM 0x020 902#define IPF_FEAT_SYNC 0x040 903#define IPF_FEAT_SCAN 0x080 904#define IPF_FEAT_IPV6 0x100 905 906typedef struct optlist { 907 u_short ol_val; 908 int ol_bit; 909} optlist_t; 910 911 912/* 913 * Group list structure. 914 */ 915typedef struct frgroup { 916 struct frgroup *fg_next; 917 struct frentry *fg_head; 918 struct frentry *fg_start; 919 u_32_t fg_flags; 920 int fg_ref; 921 char fg_name[FR_GROUPLEN]; 922} frgroup_t; 923 924#define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 925 926 927/* 928 * Used by state and NAT tables 929 */ 930typedef struct icmpinfo { 931 u_short ici_id; 932 u_short ici_seq; 933 u_char ici_type; 934} icmpinfo_t; 935 936typedef struct udpinfo { 937 u_short us_sport; 938 u_short us_dport; 939} udpinfo_t; 940 941 942typedef struct tcpdata { 943 u_32_t td_end; 944 u_32_t td_maxend; 945 u_32_t td_maxwin; 946 u_32_t td_winscale; 947 u_32_t td_maxseg; 948 int td_winflags; 949} tcpdata_t; 950 951#define TCP_WSCALE_MAX 14 952 953#define TCP_WSCALE_SEEN 0x00000001 954#define TCP_WSCALE_FIRST 0x00000002 955#define TCP_SACK_PERMIT 0x00000004 956 957 958typedef struct tcpinfo { 959 u_short ts_sport; 960 u_short ts_dport; 961 tcpdata_t ts_data[2]; 962} tcpinfo_t; 963 964 965/* 966 * Structures to define a GRE header as seen in a packet. 967 */ 968struct grebits { 969 u_32_t grb_C:1; 970 u_32_t grb_R:1; 971 u_32_t grb_K:1; 972 u_32_t grb_S:1; 973 u_32_t grb_s:1; 974 u_32_t grb_recur:1; 975 u_32_t grb_A:1; 976 u_32_t grb_flags:3; 977 u_32_t grb_ver:3; 978 u_short grb_ptype; 979}; 980 981typedef struct grehdr { 982 union { 983 struct grebits gru_bits; 984 u_short gru_flags; 985 } gr_un; 986 u_short gr_len; 987 u_short gr_call; 988} grehdr_t; 989 990#define gr_flags gr_un.gru_flags 991#define gr_bits gr_un.gru_bits 992#define gr_ptype gr_bits.grb_ptype 993#define gr_C gr_bits.grb_C 994#define gr_R gr_bits.grb_R 995#define gr_K gr_bits.grb_K 996#define gr_S gr_bits.grb_S 997#define gr_s gr_bits.grb_s 998#define gr_recur gr_bits.grb_recur 999#define gr_A gr_bits.grb_A 1000#define gr_ver gr_bits.grb_ver 1001 1002/* 1003 * GRE information tracked by "keep state" 1004 */ 1005typedef struct greinfo { 1006 u_short gs_call[2]; 1007 u_short gs_flags; 1008 u_short gs_ptype; 1009} greinfo_t; 1010 1011#define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1012 1013 1014/* 1015 * Format of an Authentication header 1016 */ 1017typedef struct authhdr { 1018 u_char ah_next; 1019 u_char ah_plen; 1020 u_short ah_reserved; 1021 u_32_t ah_spi; 1022 u_32_t ah_seq; 1023 /* Following the sequence number field is 0 or more bytes of */ 1024 /* authentication data, as specified by ah_plen - RFC 2402. */ 1025} authhdr_t; 1026 1027 1028/* 1029 * Timeout tail queue list member 1030 */ 1031typedef struct ipftqent { 1032 struct ipftqent **tqe_pnext; 1033 struct ipftqent *tqe_next; 1034 struct ipftq *tqe_ifq; 1035 void *tqe_parent; /* pointer back to NAT/state struct */ 1036 u_long tqe_die; /* when this entriy is to die */ 1037 u_long tqe_touched; 1038 int tqe_flags; 1039 int tqe_state[2]; /* current state of this entry */ 1040} ipftqent_t; 1041 1042#define TQE_RULEBASED 0x00000001 1043 1044 1045/* 1046 * Timeout tail queue head for IPFilter 1047 */ 1048typedef struct ipftq { 1049 ipfmutex_t ifq_lock; 1050 u_int ifq_ttl; 1051 ipftqent_t *ifq_head; 1052 ipftqent_t **ifq_tail; 1053 struct ipftq *ifq_next; 1054 struct ipftq **ifq_pnext; 1055 int ifq_ref; 1056 u_int ifq_flags; 1057} ipftq_t; 1058 1059#define IFQF_USER 0x01 /* User defined aging */ 1060#define IFQF_DELETE 0x02 /* Marked for deletion */ 1061#define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1062 1063#define IPF_HZ_MULT 1 1064#define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1065 /* checks its timeout queues. */ 1066#define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1067 1068typedef int (*ipftq_delete_fn_t)(void *); 1069 1070/* 1071 * Structure to define address for pool lookups. 1072 */ 1073typedef struct { 1074 u_char adf_len; 1075 i6addr_t adf_addr; 1076} addrfamily_t; 1077 1078 1079/* 1080 * Object structure description. For passing through in ioctls. 1081 */ 1082typedef struct ipfobj { 1083 u_32_t ipfo_rev; /* IPFilter version number */ 1084 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1085 void *ipfo_ptr; /* pointer to object */ 1086 int ipfo_type; /* type of object being pointed to */ 1087 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1088 u_char ipfo_xxxpad[32]; /* reserved for future use */ 1089} ipfobj_t; 1090 1091#define IPFOBJ_FRENTRY 0 /* struct frentry */ 1092#define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1093#define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1094#define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1095#define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1096#define IPFOBJ_IPNAT 5 /* struct ipnat */ 1097#define IPFOBJ_NATSTAT 6 /* struct natstat */ 1098#define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1099#define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1100#define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1101#define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1102#define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1103#define IPFOBJ_FRAUTH 12 /* struct frauth */ 1104#define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1105#define IPFOBJ_NAT 14 /* struct nat */ 1106#define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1107#define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1108#define IPFOBJ_GTABLE 17 /* struct ipftable */ 1109#define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1110#define IPFOBJ_STATETQTAB 19 /* struct ipftq [NSTATES] */ 1111#define IPFOBJ_COUNT 20 /* How many #defines are above this? */ 1112 1113 1114typedef union ipftunevalptr { 1115 void *ipftp_void; 1116 u_long *ipftp_long; 1117 u_int *ipftp_int; 1118 u_short *ipftp_short; 1119 u_char *ipftp_char; 1120} ipftunevalptr_t; 1121 1122typedef struct ipftuneable { 1123 ipftunevalptr_t ipft_una; 1124 const char *ipft_name; 1125 u_long ipft_min; 1126 u_long ipft_max; 1127 int ipft_sz; 1128 int ipft_flags; 1129 struct ipftuneable *ipft_next; 1130} ipftuneable_t; 1131 1132#define ipft_addr ipft_una.ipftp_void 1133#define ipft_plong ipft_una.ipftp_long 1134#define ipft_pint ipft_una.ipftp_int 1135#define ipft_pshort ipft_una.ipftp_short 1136#define ipft_pchar ipft_una.ipftp_char 1137 1138#define IPFT_RDONLY 1 /* read-only */ 1139#define IPFT_WRDISABLED 2 /* write when disabled only */ 1140 1141typedef union ipftuneval { 1142 u_long ipftu_long; 1143 u_int ipftu_int; 1144 u_short ipftu_short; 1145 u_char ipftu_char; 1146} ipftuneval_t; 1147 1148typedef struct ipftune { 1149 void *ipft_cookie; 1150 ipftuneval_t ipft_un; 1151 u_long ipft_min; 1152 u_long ipft_max; 1153 int ipft_sz; 1154 int ipft_flags; 1155 char ipft_name[80]; 1156} ipftune_t; 1157 1158#define ipft_vlong ipft_un.ipftu_long 1159#define ipft_vint ipft_un.ipftu_int 1160#define ipft_vshort ipft_un.ipftu_short 1161#define ipft_vchar ipft_un.ipftu_char 1162 1163/* 1164 * 1165 */ 1166typedef struct ipfruleiter { 1167 int iri_inout; 1168 char iri_group[FR_GROUPLEN]; 1169 int iri_active; 1170 int iri_nrules; 1171 int iri_v; 1172 frentry_t *iri_rule; 1173} ipfruleiter_t; 1174 1175/* 1176 * Values for iri_inout 1177 */ 1178#define F_IN 0 1179#define F_OUT 1 1180#define F_ACIN 2 1181#define F_ACOUT 3 1182 1183 1184typedef struct ipfgeniter { 1185 int igi_type; 1186 int igi_nitems; 1187 void *igi_data; 1188} ipfgeniter_t; 1189 1190#define IPFGENITER_IPF 0 1191#define IPFGENITER_NAT 1 1192#define IPFGENITER_IPNAT 2 1193#define IPFGENITER_FRAG 3 1194#define IPFGENITER_AUTH 4 1195#define IPFGENITER_STATE 5 1196#define IPFGENITER_NATFRAG 6 1197#define IPFGENITER_HOSTMAP 7 1198#define IPFGENITER_LOOKUP 8 1199 1200typedef struct ipftable { 1201 int ita_type; 1202 void *ita_table; 1203} ipftable_t; 1204 1205#define IPFTABLE_BUCKETS 1 1206#define IPFTABLE_BUCKETS_NATIN 2 1207#define IPFTABLE_BUCKETS_NATOUT 3 1208 1209 1210/* 1211 * 1212 */ 1213typedef struct ipftoken { 1214 struct ipftoken *ipt_next; 1215 struct ipftoken **ipt_pnext; 1216 void *ipt_ctx; 1217 void *ipt_data; 1218 u_long ipt_die; 1219 int ipt_type; 1220 int ipt_uid; 1221 int ipt_subtype; 1222 int ipt_ref; 1223} ipftoken_t; 1224 1225 1226/* 1227** HPUX Port 1228*/ 1229#ifdef __hpux 1230/* HP-UX locking sequence deadlock detection module lock MAJOR ID */ 1231# define IPF_SMAJ 0 /* temp assignment XXX, not critical */ 1232#endif 1233 1234#if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1235 (__FreeBSD_version >= 220000) 1236# define CDEV_MAJOR 79 1237#endif 1238 1239/* 1240 * Post NetBSD 1.2 has the PFIL interface for packet filters. This turns 1241 * on those hooks. We don't need any special mods in non-IP Filter code 1242 * with this! 1243 */ 1244#if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \ 1245 (defined(NetBSD1_2) && NetBSD1_2 > 1) || \ 1246 (defined(__FreeBSD__) && (__FreeBSD_version >= 500043)) 1247# if (NetBSD >= 199905) 1248# define PFIL_HOOKS 1249# endif 1250# ifdef PFIL_HOOKS 1251# define NETBSD_PF 1252# endif 1253#endif 1254 1255#ifdef _KERNEL 1256# define FR_VERBOSE(verb_pr) 1257# define FR_DEBUG(verb_pr) 1258#else 1259extern void debug(char *, ...); 1260extern void verbose(char *, ...); 1261# define FR_VERBOSE(verb_pr) verbose verb_pr 1262# define FR_DEBUG(verb_pr) debug verb_pr 1263#endif 1264 1265 1266#ifndef _KERNEL 1267extern int fr_check(struct ip *, int, void *, int, mb_t **); 1268extern int (*fr_checkp)(ip_t *, int, void *, int, mb_t **); 1269extern int ipf_log(void); 1270extern struct ifnet *get_unit(char *, int); 1271extern char *get_ifname(struct ifnet *); 1272# if defined(__NetBSD__) || defined(__OpenBSD__) || \ 1273 (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) 1274extern int iplioctl(int, ioctlcmd_t, void *, int); 1275# else 1276extern int iplioctl(int, ioctlcmd_t, void *, int); 1277# endif 1278extern int iplopen(dev_t, int); 1279extern int iplclose(dev_t, int); 1280extern void m_freem(mb_t *); 1281extern int bcopywrap(void *, void *, size_t); 1282#else /* #ifndef _KERNEL */ 1283# ifdef BSD 1284# if (defined(__NetBSD__) && (__NetBSD_Version__ < 399000000)) || \ 1285 defined(__osf__) || \ 1286 (defined(__FreeBSD_version) && (__FreeBSD_version < 500043)) 1287# include <sys/select.h> 1288# else 1289# include <sys/selinfo.h> 1290# endif 1291extern struct selinfo ipfselwait[IPL_LOGSIZE]; 1292# endif 1293# if defined(__NetBSD__) && defined(PFIL_HOOKS) 1294extern void ipfilterattach(int); 1295# endif 1296extern int ipl_enable(void); 1297extern int ipl_disable(void); 1298extern int ipf_inject(fr_info_t *, mb_t *); 1299# ifdef MENTAT 1300extern int fr_check(struct ip *, int, void *, int, void *, 1301 mblk_t **); 1302# if SOLARIS 1303# if SOLARIS2 >= 7 1304extern int iplioctl(dev_t, int, intptr_t, int, cred_t *, int *); 1305# else 1306extern int iplioctl(dev_t, int, int *, int, cred_t *, int *); 1307# endif 1308extern int iplopen(dev_t *, int, int, cred_t *); 1309extern int iplclose(dev_t, int, int, cred_t *); 1310extern int iplread(dev_t, uio_t *, cred_t *); 1311extern int iplwrite(dev_t, uio_t *, cred_t *); 1312# endif 1313# ifdef __hpux 1314extern int iplopen(dev_t, int, intptr_t, int); 1315extern int iplclose(dev_t, int, int); 1316extern int iplioctl(dev_t, int, void *, int); 1317extern int iplread(dev_t, uio_t *); 1318extern int iplwrite(dev_t, uio_t *); 1319extern int iplselect(dev_t, int); 1320# endif 1321extern int fr_qout(queue_t *, mblk_t *); 1322# else /* MENTAT */ 1323extern int fr_check(struct ip *, int, void *, int, mb_t **); 1324extern int (*fr_checkp)(ip_t *, int, void *, int, mb_t **); 1325extern size_t mbufchainlen(mb_t *); 1326# ifdef __sgi 1327# include <sys/cred.h> 1328extern int iplioctl(dev_t, int, void *, int, cred_t *, int *); 1329extern int iplopen(dev_t *, int, int, cred_t *); 1330extern int iplclose(dev_t, int, int, cred_t *); 1331extern int iplread(dev_t, uio_t *, cred_t *); 1332extern int iplwrite(dev_t, uio_t *, cred_t *); 1333extern int ipfilter_sgi_attach(void); 1334extern void ipfilter_sgi_detach(void); 1335extern void ipfilter_sgi_intfsync(void); 1336# else 1337# ifdef IPFILTER_LKM 1338extern int iplidentify(char *); 1339# endif 1340# if (defined(_BSDI_VERSION) && (_BSDI_VERSION >= 199510)) || \ 1341 (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) || \ 1342 (defined(NetBSD) && (NetBSD >= 199511)) || defined(__OpenBSD__) 1343# if defined(__NetBSD__) || (_BSDI_VERSION >= 199701) || \ 1344 defined(__OpenBSD__) || (__FreeBSD_version >= 300000) 1345# if (__FreeBSD_version >= 500024) 1346# if (__FreeBSD_version >= 502116) 1347extern int iplioctl(struct cdev*, u_long, void *, int, struct thread *); 1348# else 1349extern int iplioctl(dev_t, u_long, void *, int, struct thread *); 1350# endif /* __FreeBSD_version >= 502116 */ 1351# else 1352# if (__NetBSD_Version__ >= 499001000) 1353extern int iplioctl(dev_t, u_long, void *, int, struct lwp *); 1354# else 1355# if (__NetBSD_Version__ >= 399001400) 1356extern int iplioctl(dev_t, u_long, caddr_t, int, struct lwp *); 1357# else 1358extern int iplioctl(dev_t, u_long, caddr_t, int, struct proc *); 1359# endif 1360# endif 1361# endif /* __FreeBSD_version >= 500024 */ 1362# else 1363extern int iplioctl(dev_t, int, void *, int, struct lwp *); 1364# endif 1365# if (__FreeBSD_version >= 500024) 1366# if (__FreeBSD_version >= 502116) 1367extern int iplopen(struct cdev*, int, int, struct thread *); 1368extern int iplclose(struct cdev*, int, int, struct thread *); 1369# else 1370extern int iplopen(dev_t, int, int, struct thread *); 1371extern int iplclose(dev_t, int, int, struct thread *); 1372# endif /* __FreeBSD_version >= 502116 */ 1373# else 1374# if (__NetBSD_Version__ >= 399001400) 1375extern int iplopen(dev_t, int, int, struct lwp *); 1376extern int iplclose(dev_t, int, int, struct lwp *); 1377# else 1378extern int iplopen(dev_t, int, int, struct proc *); 1379extern int iplclose(dev_t, int, int, struct proc *); 1380# endif /* __NetBSD_Version__ >= 399001400 */ 1381# endif /* __FreeBSD_version >= 500024 */ 1382# else 1383# ifdef linux 1384extern int iplioctl(struct inode *, struct file *, u_int, u_long); 1385# else 1386extern int iplopen(dev_t, int); 1387extern int iplclose(dev_t, int); 1388extern int iplioctl(dev_t, int, void *, int); 1389# endif 1390# endif /* (_BSDI_VERSION >= 199510) */ 1391# if defined(BSD) && (BSD >= 199306) 1392# if (__FreeBSD_version >= 502116) 1393extern int iplread(struct cdev*, struct uio *, int); 1394extern int iplwrite(struct cdev*, struct uio *, int); 1395# else 1396extern int iplread(dev_t, struct uio *, int); 1397extern int iplwrite(dev_t, struct uio *, int); 1398# endif /* __FreeBSD_version >= 502116 */ 1399# else 1400# ifndef linux 1401extern int iplread(dev_t, struct uio *); 1402extern int iplwrite(dev_t, struct uio *); 1403# endif 1404# endif /* BSD >= 199306 */ 1405# endif /* __ sgi */ 1406# endif /* MENTAT */ 1407 1408# if defined(__FreeBSD_version) 1409extern int ipf_pfil_hook(void); 1410extern int ipf_pfil_unhook(void); 1411extern void ipf_event_reg(void); 1412extern void ipf_event_dereg(void); 1413# endif 1414 1415#endif /* #ifndef _KERNEL */ 1416 1417extern ipfmutex_t ipl_mutex, ipf_authmx, ipf_rw, ipf_hostmap; 1418extern ipfmutex_t ipf_timeoutlock, ipf_stinsert, ipf_natio, ipf_nat_new; 1419extern ipfrwlock_t ipf_mutex, ipf_global, ip_poolrw, ipf_ipidfrag; 1420extern ipfrwlock_t ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_auth; 1421extern ipfrwlock_t ipf_frcache, ipf_tokens; 1422 1423extern char *memstr(const char *, char *, size_t, size_t); 1424extern int count4bits(u_32_t); 1425extern int frrequest(int, ioctlcmd_t, void *, int, int); 1426extern char *getifname(struct ifnet *); 1427extern int ipfattach(void); 1428extern int ipfdetach(void); 1429extern u_short ipf_cksum(u_short *, int); 1430extern int copyinptr(void *, void *, size_t); 1431extern int copyoutptr(void *, void *, size_t); 1432extern int fr_fastroute(mb_t *, mb_t **, fr_info_t *, frdest_t *); 1433extern int fr_inobj(void *, ipfobj_t *, void *, int); 1434extern int fr_inobjsz(void *, void *, int, int); 1435extern int fr_ioctlswitch(int, void *, ioctlcmd_t, int, int, void *); 1436extern int fr_ipf_ioctl(void *, ioctlcmd_t, int, int, void *); 1437extern int fr_ipftune(ioctlcmd_t, void *); 1438extern int fr_outobj(void *, void *, int); 1439extern int fr_outobjk(ipfobj_t *, void *); 1440extern int fr_outobjsz(void *, void *, int, int); 1441extern void *fr_pullup(mb_t *, fr_info_t *, int); 1442extern void fr_resolvedest(struct frdest *, int); 1443extern int fr_resolvefunc(void *); 1444extern void *fr_resolvenic(char *, int); 1445extern int fr_send_icmp_err(int, fr_info_t *, int); 1446extern int fr_send_reset(fr_info_t *); 1447#if (defined(__FreeBSD_version) && (__FreeBSD_version < 501000)) || \ 1448 !defined(_KERNEL) || defined(linux) 1449extern int ppsratecheck(struct timeval *, int *, int); 1450#endif 1451extern ipftq_t *fr_addtimeoutqueue(ipftq_t **, u_int); 1452extern void fr_deletequeueentry(ipftqent_t *); 1453extern int fr_deletetimeoutqueue(ipftq_t *); 1454extern void fr_freetimeoutqueue(ipftq_t *); 1455extern void fr_movequeue(ipftqent_t *, ipftq_t *, ipftq_t *); 1456extern void fr_queueappend(ipftqent_t *, ipftq_t *, void *); 1457extern void fr_queueback(ipftqent_t *); 1458extern void fr_queuefront(ipftqent_t *); 1459extern void fr_checkv4sum(fr_info_t *); 1460extern int fr_checkl4sum(fr_info_t *); 1461extern int fr_ifpfillv4addr(int, struct sockaddr_in *, 1462 struct sockaddr_in *, struct in_addr *, 1463 struct in_addr *); 1464extern int fr_coalesce(fr_info_t *); 1465#ifdef USE_INET6 1466extern void fr_checkv6sum(fr_info_t *); 1467extern int fr_ifpfillv6addr(int, struct sockaddr_in6 *, 1468 struct sockaddr_in6 *, struct in_addr *, 1469 struct in_addr *); 1470#endif 1471 1472extern int fr_addipftune(ipftuneable_t *); 1473extern int fr_delipftune(ipftuneable_t *); 1474 1475extern int frflush(minor_t, int, int); 1476extern void frsync(void *); 1477extern frgroup_t *fr_addgroup(char *, void *, u_32_t, minor_t, int); 1478extern int fr_derefrule(frentry_t **); 1479extern void fr_delgroup(char *, minor_t, int); 1480extern frgroup_t *fr_findgroup(char *, minor_t, int, frgroup_t ***); 1481 1482extern int fr_loginit(void); 1483extern int ipflog_canread(int); 1484extern int ipflog_clear(minor_t); 1485extern int ipflog_read(minor_t, uio_t *); 1486extern int ipflog(fr_info_t *, u_int); 1487extern int ipllog(int, fr_info_t *, void **, size_t *, int *, int); 1488extern void fr_logunload(void); 1489 1490extern frentry_t *fr_acctpkt(fr_info_t *, u_32_t *); 1491extern int fr_copytolog(int, char *, int); 1492extern u_short fr_cksum(mb_t *, ip_t *, int, void *, int); 1493extern void fr_deinitialise(void); 1494extern frentry_t *fr_dolog(fr_info_t *, u_32_t *); 1495extern frentry_t *fr_dstgrpmap(fr_info_t *, u_32_t *); 1496extern void fr_fixskip(frentry_t **, frentry_t *, int); 1497extern void fr_forgetifp(void *); 1498extern frentry_t *fr_getrulen(int, char *, u_32_t); 1499extern int fr_ifpaddr(int, int, void *, 1500 struct in_addr *, struct in_addr *); 1501extern int fr_initialise(void); 1502extern int fr_lock(void *, int *); 1503extern int fr_makefrip(int, ip_t *, fr_info_t *); 1504extern int fr_matchtag(ipftag_t *, ipftag_t *); 1505extern int fr_matchicmpqueryreply(int, icmpinfo_t *, 1506 struct icmp *, int); 1507extern u_32_t fr_newisn(fr_info_t *); 1508extern u_short fr_nextipid(fr_info_t *); 1509extern int ipf_queueflush(ipftq_delete_fn_t, ipftq_t *, ipftq_t *); 1510extern int fr_scanlist(fr_info_t *, u_32_t); 1511extern frentry_t *fr_srcgrpmap(fr_info_t *, u_32_t *); 1512extern int fr_tcpudpchk(fr_info_t *, frtuc_t *); 1513extern int fr_verifysrc(fr_info_t *fin); 1514extern int fr_zerostats(void *); 1515extern ipftoken_t *ipf_findtoken(int, int, void *); 1516extern void ipf_dereftoken(ipftoken_t *); 1517extern int ipf_getnextrule(ipftoken_t *, void *); 1518extern void ipf_expiretokens(void); 1519extern void ipf_freetoken(ipftoken_t *); 1520extern int ipf_deltoken(int,int, void *); 1521extern int ipfsync(void); 1522extern int ipf_genericiter(void *, int, void *); 1523#ifndef ipf_random 1524extern u_32_t ipf_random(void); 1525#endif 1526#ifdef NEED_LOCAL_RAND 1527extern void ipf_rand_push(void *, int); 1528#endif 1529 1530extern int fr_running; 1531extern u_long fr_frouteok[2]; 1532extern int fr_pass; 1533extern int fr_flags; 1534extern int fr_active; 1535extern int fr_chksrc; 1536extern int fr_minttl; 1537extern int fr_refcnt; 1538extern int fr_control_forwarding; 1539extern int fr_update_ipid; 1540extern int nat_logging; 1541extern int ipstate_logging; 1542extern int ipl_suppress; 1543extern int ipl_logmax; 1544extern int ipl_logall; 1545extern int ipl_logsize; 1546extern u_long fr_ticks; 1547extern fr_info_t frcache[2][8]; 1548extern char ipfilter_version[]; 1549extern iplog_t **iplh[IPL_LOGSIZE], *iplt[IPL_LOGSIZE]; 1550extern int iplused[IPL_LOGMAX + 1]; 1551extern struct frentry *ipfilter[2][2], *ipacct[2][2]; 1552#ifdef USE_INET6 1553extern struct frentry *ipfilter6[2][2], *ipacct6[2][2]; 1554extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1555extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1556extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1557#endif 1558#ifdef IPFILTER_COMPAT 1559extern int fr_in_compat(ipfobj_t *, void *); 1560extern int fr_out_compat(ipfobj_t *, void *); 1561#endif 1562extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1563extern struct frgroup *ipfgroups[IPL_LOGSIZE][2]; 1564extern struct filterstats frstats[]; 1565extern frentry_t *ipfrule_match(fr_info_t *); 1566extern u_char ipf_iss_secret[32]; 1567extern ipftuneable_t ipf_tuneables[]; 1568 1569#endif /* _NETINET_IP_FIL_H_ */ 1570