1 /* 2 * Copyright (C) 2012 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 * $FreeBSD$ 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/in.h> 15 16 #include "netinet/ip_compat.h" 17 #include "netinet/ipf_rb.h" 18 #if NETBSD_GE_REV(104040000) 19 # include <sys/callout.h> 20 #endif 21 #if defined(BSD) && defined(_KERNEL) 22 # include <sys/selinfo.h> 23 #endif 24 25 #ifndef SOLARIS 26 # if defined(sun) && defined(__SVR4) 27 # define SOLARIS 1 28 # else 29 # define SOLARIS 0 30 # endif 31 #endif 32 33 #ifndef __P 34 # ifdef __STDC__ 35 # define __P(x) x 36 # else 37 # define __P(x) () 38 # endif 39 #endif 40 41 #if defined(__STDC__) || defined(__GNUC__) 42 # define SIOCADAFR _IOW('r', 60, struct ipfobj) 43 # define SIOCRMAFR _IOW('r', 61, struct ipfobj) 44 # define SIOCSETFF _IOW('r', 62, u_int) 45 # define SIOCGETFF _IOR('r', 63, u_int) 46 # define SIOCGETFS _IOWR('r', 64, struct ipfobj) 47 # define SIOCIPFFL _IOWR('r', 65, int) 48 # define SIOCIPFFB _IOR('r', 66, int) 49 # define SIOCADIFR _IOW('r', 67, struct ipfobj) 50 # define SIOCRMIFR _IOW('r', 68, struct ipfobj) 51 # define SIOCSWAPA _IOR('r', 69, u_int) 52 # define SIOCINAFR _IOW('r', 70, struct ipfobj) 53 # define SIOCINIFR _IOW('r', 71, struct ipfobj) 54 # define SIOCFRENB _IOW('r', 72, u_int) 55 # define SIOCFRSYN _IOW('r', 73, u_int) 56 # define SIOCFRZST _IOWR('r', 74, struct ipfobj) 57 # define SIOCZRLST _IOWR('r', 75, struct ipfobj) 58 # define SIOCAUTHW _IOWR('r', 76, struct ipfobj) 59 # define SIOCAUTHR _IOWR('r', 77, struct ipfobj) 60 # define SIOCSTAT1 _IOWR('r', 78, struct ipfobj) 61 # define SIOCSTLCK _IOWR('r', 79, u_int) 62 # define SIOCSTPUT _IOWR('r', 80, struct ipfobj) 63 # define SIOCSTGET _IOWR('r', 81, struct ipfobj) 64 # define SIOCSTGSZ _IOWR('r', 82, struct ipfobj) 65 # define SIOCSTAT2 _IOWR('r', 83, struct ipfobj) 66 # define SIOCSETLG _IOWR('r', 84, int) 67 # define SIOCGETLG _IOWR('r', 85, int) 68 # define SIOCFUNCL _IOWR('r', 86, struct ipfunc_resolve) 69 # define SIOCIPFGETNEXT _IOWR('r', 87, struct ipfobj) 70 # define SIOCIPFGET _IOWR('r', 88, struct ipfobj) 71 # define SIOCIPFSET _IOWR('r', 89, struct ipfobj) 72 # define SIOCIPFL6 _IOWR('r', 90, int) 73 # define SIOCIPFITER _IOWR('r', 91, struct ipfobj) 74 # define SIOCGENITER _IOWR('r', 92, struct ipfobj) 75 # define SIOCGTABL _IOWR('r', 93, struct ipfobj) 76 # define SIOCIPFDELTOK _IOWR('r', 94, int) 77 # define SIOCLOOKUPITER _IOWR('r', 95, struct ipfobj) 78 # define SIOCGTQTAB _IOWR('r', 96, struct ipfobj) 79 # define SIOCMATCHFLUSH _IOWR('r', 97, struct ipfobj) 80 # define SIOCIPFINTERROR _IOR('r', 98, int) 81 #else 82 # define SIOCADAFR _IOW(r, 60, struct ipfobj) 83 # define SIOCRMAFR _IOW(r, 61, struct ipfobj) 84 # define SIOCSETFF _IOW(r, 62, u_int) 85 # define SIOCGETFF _IOR(r, 63, u_int) 86 # define SIOCGETFS _IOWR(r, 64, struct ipfobj) 87 # define SIOCIPFFL _IOWR(r, 65, int) 88 # define SIOCIPFFB _IOR(r, 66, int) 89 # define SIOCADIFR _IOW(r, 67, struct ipfobj) 90 # define SIOCRMIFR _IOW(r, 68, struct ipfobj) 91 # define SIOCSWAPA _IOR(r, 69, u_int) 92 # define SIOCINAFR _IOW(r, 70, struct ipfobj) 93 # define SIOCINIFR _IOW(r, 71, struct ipfobj) 94 # define SIOCFRENB _IOW(r, 72, u_int) 95 # define SIOCFRSYN _IOW(r, 73, u_int) 96 # define SIOCFRZST _IOWR(r, 74, struct ipfobj) 97 # define SIOCZRLST _IOWR(r, 75, struct ipfobj) 98 # define SIOCAUTHW _IOWR(r, 76, struct ipfobj) 99 # define SIOCAUTHR _IOWR(r, 77, struct ipfobj) 100 # define SIOCSTAT1 _IOWR(r, 78, struct ipfobj) 101 # define SIOCSTLCK _IOWR(r, 79, u_int) 102 # define SIOCSTPUT _IOWR(r, 80, struct ipfobj) 103 # define SIOCSTGET _IOWR(r, 81, struct ipfobj) 104 # define SIOCSTGSZ _IOWR(r, 82, struct ipfobj) 105 # define SIOCSTAT2 _IOWR(r, 83, struct ipfobj) 106 # define SIOCSETLG _IOWR(r, 84, int) 107 # define SIOCGETLG _IOWR(r, 85, int) 108 # define SIOCFUNCL _IOWR(r, 86, struct ipfunc_resolve) 109 # define SIOCIPFGETNEXT _IOWR(r, 87, struct ipfobj) 110 # define SIOCIPFGET _IOWR(r, 88, struct ipfobj) 111 # define SIOCIPFSET _IOWR(r, 89, struct ipfobj) 112 # define SIOCIPFL6 _IOWR(r, 90, int) 113 # define SIOCIPFITER _IOWR(r, 91, struct ipfobj) 114 # define SIOCGENITER _IOWR(r, 92, struct ipfobj) 115 # define SIOCGTABL _IOWR(r, 93, struct ipfobj) 116 # define SIOCIPFDELTOK _IOWR(r, 94, int) 117 # define SIOCLOOKUPITER _IOWR(r, 95, struct ipfobj) 118 # define SIOCGTQTAB _IOWR(r, 96, struct ipfobj) 119 # define SIOCMATCHFLUSH _IOWR(r, 97, struct ipfobj) 120 # define SIOCIPFINTERROR _IOR(r, 98, int) 121 #endif 122 #define SIOCADDFR SIOCADAFR 123 #define SIOCDELFR SIOCRMAFR 124 #define SIOCINSFR SIOCINAFR 125 #define SIOCATHST SIOCSTAT1 126 #define SIOCGFRST SIOCSTAT2 127 128 129 struct ipscan; 130 struct ifnet; 131 struct ipf_main_softc_s; 132 133 typedef int (* lookupfunc_t) __P((struct ipf_main_softc_s *, void *, 134 int, void *, u_int)); 135 136 /* 137 * i6addr is used as a container for both IPv4 and IPv6 addresses, as well 138 * as other types of objects, depending on its qualifier. 139 */ 140 typedef union i6addr { 141 u_32_t i6[4]; 142 struct in_addr in4; 143 #ifdef USE_INET6 144 struct in6_addr in6; 145 #endif 146 void *vptr[2]; 147 lookupfunc_t lptr[2]; 148 struct { 149 u_short type; 150 u_short subtype; 151 int name; 152 } i6un; 153 } i6addr_t; 154 155 #define in4_addr in4.s_addr 156 #define iplookupnum i6[1] 157 #define iplookupname i6un.name 158 #define iplookuptype i6un.type 159 #define iplookupsubtype i6un.subtype 160 /* 161 * NOTE: These DO overlap the above on 64bit systems and this IS recognised. 162 */ 163 #define iplookupptr vptr[0] 164 #define iplookupfunc lptr[1] 165 166 #define I60(x) (((u_32_t *)(x))[0]) 167 #define I61(x) (((u_32_t *)(x))[1]) 168 #define I62(x) (((u_32_t *)(x))[2]) 169 #define I63(x) (((u_32_t *)(x))[3]) 170 #define HI60(x) ntohl(((u_32_t *)(x))[0]) 171 #define HI61(x) ntohl(((u_32_t *)(x))[1]) 172 #define HI62(x) ntohl(((u_32_t *)(x))[2]) 173 #define HI63(x) ntohl(((u_32_t *)(x))[3]) 174 175 #define IP6_EQ(a,b) ((I63(a) == I63(b)) && (I62(a) == I62(b)) && \ 176 (I61(a) == I61(b)) && (I60(a) == I60(b))) 177 #define IP6_NEQ(a,b) ((I63(a) != I63(b)) || (I62(a) != I62(b)) || \ 178 (I61(a) != I61(b)) || (I60(a) != I60(b))) 179 #define IP6_ISZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) == 0) 180 #define IP6_NOTZERO(a) ((I60(a) | I61(a) | I62(a) | I63(a)) != 0) 181 #define IP6_ISONES(a) ((I63(a) == 0xffffffff) && (I62(a) == 0xffffffff) && \ 182 (I61(a) == 0xffffffff) && (I60(a) == 0xffffffff)) 183 #define IP6_GT(a,b) (ntohl(HI60(a)) > ntohl(HI60(b)) || \ 184 (HI60(a) == HI60(b) && \ 185 (ntohl(HI61(a)) > ntohl(HI61(b)) || \ 186 (HI61(a) == HI61(b) && \ 187 (ntohl(HI62(a)) > ntohl(HI62(b)) || \ 188 (HI62(a) == HI62(b) && \ 189 ntohl(HI63(a)) > ntohl(HI63(b)))))))) 190 #define IP6_LT(a,b) (ntohl(HI60(a)) < ntohl(HI60(b)) || \ 191 (HI60(a) == HI60(b) && \ 192 (ntohl(HI61(a)) < ntohl(HI61(b)) || \ 193 (HI61(a) == HI61(b) && \ 194 (ntohl(HI62(a)) < ntohl(HI62(b)) || \ 195 (HI62(a) == HI62(b) && \ 196 ntohl(HI63(a)) < ntohl(HI63(b)))))))) 197 #define NLADD(n,x) htonl(ntohl(n) + (x)) 198 #define IP6_INC(a) \ 199 do { u_32_t *_i6 = (u_32_t *)(a); \ 200 _i6[3] = NLADD(_i6[3], 1); \ 201 if (_i6[3] == 0) { \ 202 _i6[2] = NLADD(_i6[2], 1); \ 203 if (_i6[2] == 0) { \ 204 _i6[1] = NLADD(_i6[1], 1); \ 205 if (_i6[1] == 0) { \ 206 _i6[0] = NLADD(_i6[0], 1); \ 207 } \ 208 } \ 209 } \ 210 } while (0) 211 #define IP6_ADD(a,x,d) \ 212 do { i6addr_t *_s = (i6addr_t *)(a); \ 213 i6addr_t *_d = (i6addr_t *)(d); \ 214 _d->i6[0] = NLADD(_s->i6[0], x); \ 215 if (ntohl(_d->i6[0]) < ntohl(_s->i6[0])) { \ 216 _d->i6[1] = NLADD(_d->i6[1], 1); \ 217 if (ntohl(_d->i6[1]) < ntohl(_s->i6[1])) { \ 218 _d->i6[2] = NLADD(_d->i6[2], 1); \ 219 if (ntohl(_d->i6[2]) < ntohl(_s->i6[2])) { \ 220 _d->i6[3] = NLADD(_d->i6[3], 1); \ 221 } \ 222 } \ 223 } \ 224 } while (0) 225 #define IP6_AND(a,b,d) do { i6addr_t *_s1 = (i6addr_t *)(a); \ 226 i6addr_t *_s2 = (i6addr_t *)(b); \ 227 i6addr_t *_d = (i6addr_t *)(d); \ 228 _d->i6[0] = _s1->i6[0] & _s2->i6[0]; \ 229 _d->i6[1] = _s1->i6[1] & _s2->i6[1]; \ 230 _d->i6[2] = _s1->i6[2] & _s2->i6[2]; \ 231 _d->i6[3] = _s1->i6[3] & _s2->i6[3]; \ 232 } while (0) 233 #define IP6_ANDASSIGN(a,m) \ 234 do { i6addr_t *_d = (i6addr_t *)(a); \ 235 i6addr_t *_m = (i6addr_t *)(m); \ 236 _d->i6[0] &= _m->i6[0]; \ 237 _d->i6[1] &= _m->i6[1]; \ 238 _d->i6[2] &= _m->i6[2]; \ 239 _d->i6[3] &= _m->i6[3]; \ 240 } while (0) 241 #define IP6_MASKEQ(a,m,b) \ 242 (((I60(a) & I60(m)) == I60(b)) && \ 243 ((I61(a) & I61(m)) == I61(b)) && \ 244 ((I62(a) & I62(m)) == I62(b)) && \ 245 ((I63(a) & I63(m)) == I63(b))) 246 #define IP6_MASKNEQ(a,m,b) \ 247 (((I60(a) & I60(m)) != I60(b)) || \ 248 ((I61(a) & I61(m)) != I61(b)) || \ 249 ((I62(a) & I62(m)) != I62(b)) || \ 250 ((I63(a) & I63(m)) != I63(b))) 251 #define IP6_MERGE(a,b,c) \ 252 do { i6addr_t *_d, *_s1, *_s2; \ 253 _d = (i6addr_t *)(a); \ 254 _s1 = (i6addr_t *)(b); \ 255 _s2 = (i6addr_t *)(c); \ 256 _d->i6[0] |= _s1->i6[0] & ~_s2->i6[0]; \ 257 _d->i6[1] |= _s1->i6[1] & ~_s2->i6[1]; \ 258 _d->i6[2] |= _s1->i6[2] & ~_s2->i6[2]; \ 259 _d->i6[3] |= _s1->i6[3] & ~_s2->i6[3]; \ 260 } while (0) 261 #define IP6_MASK(a,b,c) \ 262 do { i6addr_t *_d, *_s1, *_s2; \ 263 _d = (i6addr_t *)(a); \ 264 _s1 = (i6addr_t *)(b); \ 265 _s2 = (i6addr_t *)(c); \ 266 _d->i6[0] = _s1->i6[0] & ~_s2->i6[0]; \ 267 _d->i6[1] = _s1->i6[1] & ~_s2->i6[1]; \ 268 _d->i6[2] = _s1->i6[2] & ~_s2->i6[2]; \ 269 _d->i6[3] = _s1->i6[3] & ~_s2->i6[3]; \ 270 } while (0) 271 #define IP6_SETONES(a) \ 272 do { i6addr_t *_d = (i6addr_t *)(a); \ 273 _d->i6[0] = 0xffffffff; \ 274 _d->i6[1] = 0xffffffff; \ 275 _d->i6[2] = 0xffffffff; \ 276 _d->i6[3] = 0xffffffff; \ 277 } while (0) 278 279 typedef union ipso_u { 280 u_short ipso_ripso[2]; 281 u_32_t ipso_doi; 282 } ipso_t; 283 284 typedef struct fr_ip { 285 u_32_t fi_v:4; /* IP version */ 286 u_32_t fi_xx:4; /* spare */ 287 u_32_t fi_tos:8; /* IP packet TOS */ 288 u_32_t fi_ttl:8; /* IP packet TTL */ 289 u_32_t fi_p:8; /* IP packet protocol */ 290 u_32_t fi_optmsk; /* bitmask composed from IP options */ 291 i6addr_t fi_src; /* source address from packet */ 292 i6addr_t fi_dst; /* destination address from packet */ 293 ipso_t fi_ipso; /* IP security options */ 294 u_32_t fi_flx; /* packet flags */ 295 u_32_t fi_tcpmsk; /* TCP options set/reset */ 296 u_32_t fi_ports[2]; /* TCP ports */ 297 u_char fi_tcpf; /* TCP flags */ 298 u_char fi_sensitivity; 299 u_char fi_xxx[2]; /* pad */ 300 } fr_ip_t; 301 302 /* 303 * For use in fi_flx 304 */ 305 #define FI_TCPUDP 0x0001 /* TCP/UCP implied comparison*/ 306 #define FI_OPTIONS 0x0002 307 #define FI_FRAG 0x0004 308 #define FI_SHORT 0x0008 309 #define FI_NATED 0x0010 310 #define FI_MULTICAST 0x0020 311 #define FI_BROADCAST 0x0040 312 #define FI_MBCAST 0x0080 313 #define FI_STATE 0x0100 314 #define FI_BADNAT 0x0200 315 #define FI_BAD 0x0400 316 #define FI_OOW 0x0800 /* Out of state window, else match */ 317 #define FI_ICMPERR 0x1000 318 #define FI_FRAGBODY 0x2000 319 #define FI_BADSRC 0x4000 320 #define FI_LOWTTL 0x8000 321 #define FI_CMP 0x5cfe3 /* Not FI_FRAG,FI_NATED,FI_FRAGTAIL */ 322 #define FI_ICMPCMP 0x0003 /* Flags we can check for ICMP error packets */ 323 #define FI_WITH 0x5effe /* Not FI_TCPUDP */ 324 #define FI_V6EXTHDR 0x10000 325 #define FI_COALESCE 0x20000 326 #define FI_NEWNAT 0x40000 327 #define FI_ICMPQUERY 0x80000 328 #define FI_ENCAP 0x100000 /* encap/decap with NAT */ 329 #define FI_AH 0x200000 /* AH header present */ 330 #define FI_DOCKSUM 0x10000000 /* Proxy wants L4 recalculation */ 331 #define FI_NOCKSUM 0x20000000 /* don't do a L4 checksum validation */ 332 #define FI_NOWILD 0x40000000 /* Do not do wildcard searches */ 333 #define FI_IGNORE 0x80000000 334 335 #define fi_secmsk fi_ipso.ipso_ripso[0] 336 #define fi_auth fi_ipso.ipso_ripso[1] 337 #define fi_doi fi_ipso.ipso_doi 338 #define fi_saddr fi_src.in4.s_addr 339 #define fi_daddr fi_dst.in4.s_addr 340 #define fi_srcnum fi_src.iplookupnum 341 #define fi_dstnum fi_dst.iplookupnum 342 #define fi_srcname fi_src.iplookupname 343 #define fi_dstname fi_dst.iplookupname 344 #define fi_srctype fi_src.iplookuptype 345 #define fi_dsttype fi_dst.iplookuptype 346 #define fi_srcsubtype fi_src.iplookupsubtype 347 #define fi_dstsubtype fi_dst.iplookupsubtype 348 #define fi_srcptr fi_src.iplookupptr 349 #define fi_dstptr fi_dst.iplookupptr 350 #define fi_srcfunc fi_src.iplookupfunc 351 #define fi_dstfunc fi_dst.iplookupfunc 352 353 354 /* 355 * These are both used by the state and NAT code to indicate that one port or 356 * the other should be treated as a wildcard. 357 * NOTE: When updating, check bit masks in ip_state.h and update there too. 358 */ 359 #define SI_W_SPORT 0x00000100 360 #define SI_W_DPORT 0x00000200 361 #define SI_WILDP (SI_W_SPORT|SI_W_DPORT) 362 #define SI_W_SADDR 0x00000400 363 #define SI_W_DADDR 0x00000800 364 #define SI_WILDA (SI_W_SADDR|SI_W_DADDR) 365 #define SI_NEWFR 0x00001000 366 #define SI_CLONE 0x00002000 367 #define SI_CLONED 0x00004000 368 #define SI_NEWCLONE 0x00008000 369 370 typedef struct { 371 u_short fda_ports[2]; 372 u_char fda_tcpf; /* TCP header flags (SYN, ACK, etc) */ 373 } frdat_t; 374 375 typedef enum fr_breasons_e { 376 FRB_BLOCKED = 0, 377 FRB_LOGFAIL = 1, 378 FRB_PPSRATE = 2, 379 FRB_JUMBO = 3, 380 FRB_MAKEFRIP = 4, 381 FRB_STATEADD = 5, 382 FRB_UPDATEIPID = 6, 383 FRB_LOGFAIL2 = 7, 384 FRB_DECAPFRIP = 8, 385 FRB_AUTHNEW = 9, 386 FRB_AUTHCAPTURE = 10, 387 FRB_COALESCE = 11, 388 FRB_PULLUP = 12, 389 FRB_AUTHFEEDBACK = 13, 390 FRB_BADFRAG = 14, 391 FRB_NATV4 = 15, 392 FRB_NATV6 = 16, 393 } fr_breason_t; 394 395 #define FRB_MAX_VALUE 16 396 397 typedef enum ipf_cksum_e { 398 FI_CK_BAD = -1, 399 FI_CK_NEEDED = 0, 400 FI_CK_SUMOK = 1, 401 FI_CK_L4PART = 2, 402 FI_CK_L4FULL = 4 403 } ipf_cksum_t; 404 405 typedef struct fr_info { 406 void *fin_main_soft; 407 void *fin_ifp; /* interface packet is `on' */ 408 struct frentry *fin_fr; /* last matching rule */ 409 int fin_out; /* in or out ? 1 == out, 0 == in */ 410 fr_ip_t fin_fi; /* IP Packet summary */ 411 frdat_t fin_dat; /* TCP/UDP ports, ICMP code/type */ 412 int fin_dlen; /* length of data portion of packet */ 413 int fin_plen; 414 u_32_t fin_rule; /* rule # last matched */ 415 u_short fin_hlen; /* length of IP header in bytes */ 416 char fin_group[FR_GROUPLEN]; /* group number, -1 for none */ 417 void *fin_dp; /* start of data past IP header */ 418 /* 419 * Fields after fin_dp aren't used for compression of log records. 420 * fin_fi contains the IP version (fin_family) 421 * fin_rule isn't included because adding a new rule can change it but 422 * not change fin_fr. fin_rule is the rule number reported. 423 * It isn't necessary to include fin_crc because that is checked 424 * for explicitly, before calling bcmp. 425 */ 426 u_32_t fin_crc; /* Simple calculation for logging */ 427 int fin_family; /* AF_INET, etc. */ 428 int fin_icode; /* ICMP error to return */ 429 int fin_mtu; /* MTU input for ICMP need-frag */ 430 int fin_rev; /* state only: 1 = reverse */ 431 int fin_ipoff; /* # bytes from buffer start to hdr */ 432 u_32_t fin_id; /* IP packet id field */ 433 u_short fin_l4hlen; /* length of L4 header, if known */ 434 u_short fin_off; 435 int fin_depth; /* Group nesting depth */ 436 int fin_error; /* Error code to return */ 437 ipf_cksum_t fin_cksum; /* -1 = bad, 1 = good, 0 = not done */ 438 fr_breason_t fin_reason; /* why auto blocked */ 439 u_int fin_pktnum; 440 void *fin_nattag; 441 struct frdest *fin_dif; 442 struct frdest *fin_tif; 443 union { 444 ip_t *fip_ip; 445 #ifdef USE_INET6 446 ip6_t *fip_ip6; 447 #endif 448 } fin_ipu; 449 mb_t **fin_mp; /* pointer to pointer to mbuf */ 450 mb_t *fin_m; /* pointer to mbuf */ 451 #ifdef MENTAT 452 mb_t *fin_qfm; /* pointer to mblk where pkt starts */ 453 void *fin_qpi; 454 char fin_ifname[LIFNAMSIZ]; 455 #endif 456 void *fin_fraghdr; /* pointer to start of ipv6 frag hdr */ 457 } fr_info_t; 458 459 #define fin_ip fin_ipu.fip_ip 460 #define fin_ip6 fin_ipu.fip_ip6 461 #define fin_v fin_fi.fi_v 462 #define fin_p fin_fi.fi_p 463 #define fin_flx fin_fi.fi_flx 464 #define fin_optmsk fin_fi.fi_optmsk 465 #define fin_secmsk fin_fi.fi_secmsk 466 #define fin_doi fin_fi.fi_doi 467 #define fin_auth fin_fi.fi_auth 468 #define fin_src fin_fi.fi_src.in4 469 #define fin_saddr fin_fi.fi_saddr 470 #define fin_dst fin_fi.fi_dst.in4 471 #define fin_daddr fin_fi.fi_daddr 472 #define fin_data fin_fi.fi_ports 473 #define fin_sport fin_fi.fi_ports[0] 474 #define fin_dport fin_fi.fi_ports[1] 475 #define fin_tcpf fin_fi.fi_tcpf 476 #define fin_src6 fin_fi.fi_src 477 #define fin_dst6 fin_fi.fi_dst 478 #define fin_srcip6 fin_fi.fi_src.in6 479 #define fin_dstip6 fin_fi.fi_dst.in6 480 481 #define IPF_IN 0 482 #define IPF_OUT 1 483 484 typedef struct frentry *(*ipfunc_t) __P((fr_info_t *, u_32_t *)); 485 typedef int (*ipfuncinit_t) __P((struct ipf_main_softc_s *, struct frentry *)); 486 487 typedef struct ipfunc_resolve { 488 char ipfu_name[32]; 489 ipfunc_t ipfu_addr; 490 ipfuncinit_t ipfu_init; 491 ipfuncinit_t ipfu_fini; 492 } ipfunc_resolve_t; 493 494 /* 495 * Size for compares on fr_info structures 496 */ 497 #define FI_CSIZE offsetof(fr_info_t, fin_icode) 498 #define FI_LCSIZE offsetof(fr_info_t, fin_dp) 499 500 /* 501 * Size for copying cache fr_info structure 502 */ 503 #define FI_COPYSIZE offsetof(fr_info_t, fin_dp) 504 505 /* 506 * Structure for holding IPFilter's tag information 507 */ 508 #define IPFTAG_LEN 16 509 typedef struct { 510 union { 511 u_32_t iptu_num[4]; 512 char iptu_tag[IPFTAG_LEN]; 513 } ipt_un; 514 int ipt_not; 515 } ipftag_t; 516 517 #define ipt_tag ipt_un.iptu_tag 518 #define ipt_num ipt_un.iptu_num 519 520 /* 521 * Structure to define address for pool lookups. 522 */ 523 typedef struct { 524 u_char adf_len; 525 sa_family_t adf_family; 526 u_char adf_xxx[2]; 527 i6addr_t adf_addr; 528 } addrfamily_t; 529 530 531 RBI_LINK(ipf_rb, host_node_s); 532 533 typedef struct host_node_s { 534 RBI_FIELD(ipf_rb) hn_entry; 535 addrfamily_t hn_addr; 536 int hn_active; 537 } host_node_t; 538 539 typedef RBI_HEAD(ipf_rb, host_node_s) ipf_rb_head_t; 540 541 typedef struct host_track_s { 542 ipf_rb_head_t ht_root; 543 int ht_max_nodes; 544 int ht_max_per_node; 545 int ht_netmask; 546 int ht_cur_nodes; 547 } host_track_t; 548 549 550 typedef enum fr_dtypes_e { 551 FRD_NORMAL = 0, 552 FRD_DSTLIST 553 } fr_dtypes_t; 554 /* 555 * This structure is used to hold information about the next hop for where 556 * to forward a packet. 557 */ 558 typedef struct frdest { 559 void *fd_ptr; 560 addrfamily_t fd_addr; 561 fr_dtypes_t fd_type; 562 int fd_name; 563 } frdest_t; 564 565 #define fd_ip6 fd_addr.adf_addr 566 #define fd_ip fd_ip6.in4 567 568 569 typedef enum fr_ctypes_e { 570 FR_NONE = 0, 571 FR_EQUAL, 572 FR_NEQUAL, 573 FR_LESST, 574 FR_GREATERT, 575 FR_LESSTE, 576 FR_GREATERTE, 577 FR_OUTRANGE, 578 FR_INRANGE, 579 FR_INCRANGE 580 } fr_ctypes_t; 581 582 /* 583 * This structure holds information about a port comparison. 584 */ 585 typedef struct frpcmp { 586 fr_ctypes_t frp_cmp; /* data for port comparisons */ 587 u_32_t frp_port; /* low port for <> and >< */ 588 u_32_t frp_top; /* high port for <> and >< */ 589 } frpcmp_t; 590 591 592 /* 593 * Structure containing all the relevant TCP/UDP things that can be checked in 594 * a filter rule. 595 */ 596 typedef struct frtuc { 597 u_char ftu_tcpfm; /* tcp flags mask */ 598 u_char ftu_tcpf; /* tcp flags */ 599 frpcmp_t ftu_src; /* source port */ 600 frpcmp_t ftu_dst; /* destination port */ 601 } frtuc_t; 602 603 #define ftu_scmp ftu_src.frp_cmp 604 #define ftu_dcmp ftu_dst.frp_cmp 605 #define ftu_sport ftu_src.frp_port 606 #define ftu_dport ftu_dst.frp_port 607 #define ftu_stop ftu_src.frp_top 608 #define ftu_dtop ftu_dst.frp_top 609 610 #define FR_TCPFMAX 0x3f 611 612 typedef enum fr_atypes_e { 613 FRI_NONE = -1, /* For LHS of NAT */ 614 FRI_NORMAL = 0, /* Normal address */ 615 FRI_DYNAMIC, /* dynamic address */ 616 FRI_LOOKUP, /* address is a pool # */ 617 FRI_RANGE, /* address/mask is a range */ 618 FRI_NETWORK, /* network address from if */ 619 FRI_BROADCAST, /* broadcast address from if */ 620 FRI_PEERADDR, /* Peer address for P-to-P */ 621 FRI_NETMASKED, /* network address with netmask from if */ 622 FRI_SPLIT, /* For NAT compatibility */ 623 FRI_INTERFACE /* address is based on interface name */ 624 } fr_atypes_t; 625 626 /* 627 * This structure makes up what is considered to be the IPFilter specific 628 * matching components of a filter rule, as opposed to the data structures 629 * used to define the result which are in frentry_t and not here. 630 */ 631 typedef struct fripf { 632 fr_ip_t fri_ip; 633 fr_ip_t fri_mip; /* mask structure */ 634 635 u_short fri_icmpm; /* data for ICMP packets (mask) */ 636 u_short fri_icmp; 637 638 frtuc_t fri_tuc; 639 fr_atypes_t fri_satype; /* addres type */ 640 fr_atypes_t fri_datype; /* addres type */ 641 int fri_sifpidx; /* doing dynamic addressing */ 642 int fri_difpidx; /* index into fr_ifps[] to use when */ 643 } fripf_t; 644 645 #define fri_dlookup fri_mip.fi_dst 646 #define fri_slookup fri_mip.fi_src 647 #define fri_dstnum fri_mip.fi_dstnum 648 #define fri_srcnum fri_mip.fi_srcnum 649 #define fri_dstname fri_mip.fi_dstname 650 #define fri_srcname fri_mip.fi_srcname 651 #define fri_dstptr fri_mip.fi_dstptr 652 #define fri_srcptr fri_mip.fi_srcptr 653 654 655 typedef enum fr_rtypes_e { 656 FR_T_NONE = 0, 657 FR_T_IPF, /* IPF structures */ 658 FR_T_BPFOPC, /* BPF opcode */ 659 FR_T_CALLFUNC, /* callout to function in fr_func only */ 660 FR_T_COMPIPF, /* compiled C code */ 661 FR_T_IPFEXPR, /* IPF expression */ 662 FR_T_BUILTIN = 0x40000000, /* rule is in kernel space */ 663 FR_T_IPF_BUILTIN, 664 FR_T_BPFOPC_BUILTIN, 665 FR_T_CALLFUNC_BUILTIN, 666 FR_T_COMPIPF_BUILTIN, 667 FR_T_IPFEXPR_BUILTIN 668 } fr_rtypes_t; 669 670 typedef struct frentry * (* frentfunc_t) __P((fr_info_t *)); 671 672 typedef struct frentry { 673 ipfmutex_t fr_lock; 674 struct frentry *fr_next; 675 struct frentry **fr_pnext; 676 struct frgroup *fr_grp; 677 struct frgroup *fr_grphead; 678 struct frgroup *fr_icmpgrp; 679 struct ipscan *fr_isc; 680 struct frentry *fr_dnext; /* 2 fr_die linked list pointers */ 681 struct frentry **fr_pdnext; 682 void *fr_ifas[4]; 683 void *fr_ptr; /* for use with fr_arg */ 684 int fr_comment; /* text comment for rule */ 685 int fr_size; /* size of this structure */ 686 int fr_ref; /* reference count */ 687 int fr_statecnt; /* state count - for limit rules */ 688 u_32_t fr_die; /* only used on loading the rule */ 689 u_int fr_cksum; /* checksum on filter rules for performance */ 690 /* 691 * The line number from a file is here because we need to be able to 692 * match the rule generated with ``grep rule ipf.conf | ipf -rf -'' 693 * with the rule loaded using ``ipf -f ipf.conf'' - thus it can't be 694 * on the other side of fr_func. 695 */ 696 int fr_flineno; /* line number from conf file */ 697 /* 698 * These are only incremented when a packet matches this rule and 699 * it is the last match 700 */ 701 U_QUAD_T fr_hits; 702 U_QUAD_T fr_bytes; 703 704 /* 705 * For PPS rate limiting 706 * fr_lpu is used to always have the same size for this field, 707 * allocating 64bits for seconds and 32bits for milliseconds. 708 */ 709 union { 710 struct timeval frp_lastpkt; 711 char frp_bytes[12]; 712 } fr_lpu; 713 int fr_curpps; 714 715 union { 716 void *fru_data; 717 char *fru_caddr; 718 fripf_t *fru_ipf; 719 frentfunc_t fru_func; 720 } fr_dun; 721 722 /* 723 * Fields after this may not change whilst in the kernel. 724 */ 725 ipfunc_t fr_func; /* call this function */ 726 int fr_dsize; 727 int fr_pps; 728 fr_rtypes_t fr_type; 729 u_32_t fr_flags; /* per-rule flags && options (see below) */ 730 u_32_t fr_logtag; /* user defined log tag # */ 731 u_32_t fr_collect; /* collection number */ 732 u_int fr_arg; /* misc. numeric arg for rule */ 733 u_int fr_loglevel; /* syslog log facility + priority */ 734 u_char fr_family; 735 u_char fr_icode; /* return ICMP code */ 736 int fr_group; /* group to which this rule belongs */ 737 int fr_grhead; /* group # which this rule starts */ 738 int fr_isctag; 739 int fr_rpc; /* XID Filtering */ 740 ipftag_t fr_nattag; 741 /* 742 * These are all options related to stateful filtering 743 */ 744 host_track_t fr_srctrack; 745 int fr_nostatelog; 746 int fr_statemax; /* max reference count */ 747 int fr_icmphead; /* ICMP group for state options */ 748 u_int fr_age[2]; /* non-TCP state timeouts */ 749 /* 750 * These are compared separately. 751 */ 752 int fr_ifnames[4]; 753 frdest_t fr_tifs[2]; /* "to"/"reply-to" interface */ 754 frdest_t fr_dif; /* duplicate packet interface */ 755 /* 756 * How big is the name buffer at the end? 757 */ 758 int fr_namelen; 759 char fr_names[1]; 760 } frentry_t; 761 762 #define fr_lastpkt fr_lpu.frp_lastpkt 763 #define fr_caddr fr_dun.fru_caddr 764 #define fr_data fr_dun.fru_data 765 #define fr_dfunc fr_dun.fru_func 766 #define fr_ipf fr_dun.fru_ipf 767 #define fr_ip fr_ipf->fri_ip 768 #define fr_mip fr_ipf->fri_mip 769 #define fr_icmpm fr_ipf->fri_icmpm 770 #define fr_icmp fr_ipf->fri_icmp 771 #define fr_tuc fr_ipf->fri_tuc 772 #define fr_satype fr_ipf->fri_satype 773 #define fr_datype fr_ipf->fri_datype 774 #define fr_sifpidx fr_ipf->fri_sifpidx 775 #define fr_difpidx fr_ipf->fri_difpidx 776 #define fr_proto fr_ip.fi_p 777 #define fr_mproto fr_mip.fi_p 778 #define fr_ttl fr_ip.fi_ttl 779 #define fr_mttl fr_mip.fi_ttl 780 #define fr_tos fr_ip.fi_tos 781 #define fr_mtos fr_mip.fi_tos 782 #define fr_tcpfm fr_tuc.ftu_tcpfm 783 #define fr_tcpf fr_tuc.ftu_tcpf 784 #define fr_scmp fr_tuc.ftu_scmp 785 #define fr_dcmp fr_tuc.ftu_dcmp 786 #define fr_dport fr_tuc.ftu_dport 787 #define fr_sport fr_tuc.ftu_sport 788 #define fr_stop fr_tuc.ftu_stop 789 #define fr_dtop fr_tuc.ftu_dtop 790 #define fr_dst fr_ip.fi_dst.in4 791 #define fr_dst6 fr_ip.fi_dst 792 #define fr_daddr fr_ip.fi_dst.in4.s_addr 793 #define fr_src fr_ip.fi_src.in4 794 #define fr_src6 fr_ip.fi_src 795 #define fr_saddr fr_ip.fi_src.in4.s_addr 796 #define fr_dmsk fr_mip.fi_dst.in4 797 #define fr_dmsk6 fr_mip.fi_dst 798 #define fr_dmask fr_mip.fi_dst.in4.s_addr 799 #define fr_smsk fr_mip.fi_src.in4 800 #define fr_smsk6 fr_mip.fi_src 801 #define fr_smask fr_mip.fi_src.in4.s_addr 802 #define fr_dstnum fr_ip.fi_dstnum 803 #define fr_srcnum fr_ip.fi_srcnum 804 #define fr_dlookup fr_ip.fi_dst 805 #define fr_slookup fr_ip.fi_src 806 #define fr_dstname fr_ip.fi_dstname 807 #define fr_srcname fr_ip.fi_srcname 808 #define fr_dsttype fr_ip.fi_dsttype 809 #define fr_srctype fr_ip.fi_srctype 810 #define fr_dstsubtype fr_ip.fi_dstsubtype 811 #define fr_srcsubtype fr_ip.fi_srcsubtype 812 #define fr_dstptr fr_mip.fi_dstptr 813 #define fr_srcptr fr_mip.fi_srcptr 814 #define fr_dstfunc fr_mip.fi_dstfunc 815 #define fr_srcfunc fr_mip.fi_srcfunc 816 #define fr_optbits fr_ip.fi_optmsk 817 #define fr_optmask fr_mip.fi_optmsk 818 #define fr_secbits fr_ip.fi_secmsk 819 #define fr_secmask fr_mip.fi_secmsk 820 #define fr_authbits fr_ip.fi_auth 821 #define fr_authmask fr_mip.fi_auth 822 #define fr_doi fr_ip.fi_doi 823 #define fr_doimask fr_mip.fi_doi 824 #define fr_flx fr_ip.fi_flx 825 #define fr_mflx fr_mip.fi_flx 826 #define fr_ifa fr_ifas[0] 827 #define fr_oifa fr_ifas[2] 828 #define fr_tif fr_tifs[0] 829 #define fr_rif fr_tifs[1] 830 831 #define FR_NOLOGTAG 0 832 833 #define FR_CMPSIZ (offsetof(struct frentry, fr_ifnames) - \ 834 offsetof(struct frentry, fr_func)) 835 #define FR_NAME(_f, _n) (_f)->fr_names + (_f)->_n 836 #define FR_NUM(_a) (sizeof(_a) / sizeof(*_a)) 837 838 839 /* 840 * fr_flags 841 */ 842 #define FR_BLOCK 0x00001 /* do not allow packet to pass */ 843 #define FR_PASS 0x00002 /* allow packet to pass */ 844 #define FR_AUTH 0x00003 /* use authentication */ 845 #define FR_PREAUTH 0x00004 /* require preauthentication */ 846 #define FR_ACCOUNT 0x00005 /* Accounting rule */ 847 #define FR_SKIP 0x00006 /* skip rule */ 848 #define FR_DECAPSULATE 0x00008 /* decapsulate rule */ 849 #define FR_CALL 0x00009 /* call rule */ 850 #define FR_CMDMASK 0x0000f 851 #define FR_LOG 0x00010 /* Log */ 852 #define FR_LOGB 0x00011 /* Log-fail */ 853 #define FR_LOGP 0x00012 /* Log-pass */ 854 #define FR_LOGMASK (FR_LOG|FR_CMDMASK) 855 #define FR_CALLNOW 0x00020 /* call another function (fr_func) if matches */ 856 #define FR_NOTSRCIP 0x00040 857 #define FR_NOTDSTIP 0x00080 858 #define FR_QUICK 0x00100 /* match & stop processing list */ 859 #define FR_KEEPFRAG 0x00200 /* keep fragment information */ 860 #define FR_KEEPSTATE 0x00400 /* keep `connection' state information */ 861 #define FR_FASTROUTE 0x00800 /* bypass normal routing */ 862 #define FR_RETRST 0x01000 /* Return TCP RST packet - reset connection */ 863 #define FR_RETICMP 0x02000 /* Return ICMP unreachable packet */ 864 #define FR_FAKEICMP 0x03000 /* Return ICMP unreachable with fake source */ 865 #define FR_OUTQUE 0x04000 /* outgoing packets */ 866 #define FR_INQUE 0x08000 /* ingoing packets */ 867 #define FR_LOGBODY 0x10000 /* Log the body */ 868 #define FR_LOGFIRST 0x20000 /* Log the first byte if state held */ 869 #define FR_LOGORBLOCK 0x40000 /* block the packet if it can't be logged */ 870 #define FR_STLOOSE 0x80000 /* loose state checking */ 871 #define FR_FRSTRICT 0x100000 /* strict frag. cache */ 872 #define FR_STSTRICT 0x200000 /* strict keep state */ 873 #define FR_NEWISN 0x400000 /* new ISN for outgoing TCP */ 874 #define FR_NOICMPERR 0x800000 /* do not match ICMP errors in state */ 875 #define FR_STATESYNC 0x1000000 /* synchronize state to slave */ 876 #define FR_COPIED 0x2000000 /* copied from user space */ 877 #define FR_INACTIVE 0x4000000 /* only used when flush'ing rules */ 878 #define FR_NOMATCH 0x8000000 /* no match occured */ 879 /* 0x10000000 FF_LOGPASS */ 880 /* 0x20000000 FF_LOGBLOCK */ 881 /* 0x40000000 FF_LOGNOMATCH */ 882 /* 0x80000000 FF_BLOCKNONIP */ 883 884 #define FR_RETMASK (FR_RETICMP|FR_RETRST|FR_FAKEICMP) 885 #define FR_ISBLOCK(x) (((x) & FR_CMDMASK) == FR_BLOCK) 886 #define FR_ISPASS(x) (((x) & FR_CMDMASK) == FR_PASS) 887 #define FR_ISAUTH(x) (((x) & FR_CMDMASK) == FR_AUTH) 888 #define FR_ISPREAUTH(x) (((x) & FR_CMDMASK) == FR_PREAUTH) 889 #define FR_ISACCOUNT(x) (((x) & FR_CMDMASK) == FR_ACCOUNT) 890 #define FR_ISSKIP(x) (((x) & FR_CMDMASK) == FR_SKIP) 891 #define FR_ISDECAPS(x) (((x) & FR_CMDMASK) == FR_DECAPSULATE) 892 #define FR_ISNOMATCH(x) ((x) & FR_NOMATCH) 893 #define FR_INOUT (FR_INQUE|FR_OUTQUE) 894 895 /* 896 * recognized flags for SIOCGETFF and SIOCSETFF, and get put in fr_flags 897 */ 898 #define FF_LOGPASS 0x10000000 899 #define FF_LOGBLOCK 0x20000000 900 #define FF_LOGNOMATCH 0x40000000 901 #define FF_LOGGING (FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH) 902 #define FF_BLOCKNONIP 0x80000000 /* Solaris2 Only */ 903 904 905 /* 906 * Structure that passes information on what/how to flush to the kernel. 907 */ 908 typedef struct ipfflush { 909 int ipflu_how; 910 int ipflu_arg; 911 } ipfflush_t; 912 913 914 /* 915 * 916 */ 917 typedef struct ipfgetctl { 918 u_int ipfg_min; /* min value */ 919 u_int ipfg_current; /* current value */ 920 u_int ipfg_max; /* max value */ 921 u_int ipfg_default; /* default value */ 922 u_int ipfg_steps; /* value increments */ 923 char ipfg_name[40]; /* tag name for this control */ 924 } ipfgetctl_t; 925 926 typedef struct ipfsetctl { 927 int ipfs_which; /* 0 = min 1 = current 2 = max 3 = default */ 928 u_int ipfs_value; /* min value */ 929 char ipfs_name[40]; /* tag name for this control */ 930 } ipfsetctl_t; 931 932 933 /* 934 * Some of the statistics below are in their own counters, but most are kept 935 * in this single structure so that they can all easily be collected and 936 * copied back as required. 937 */ 938 typedef struct ipf_statistics { 939 u_long fr_icmp_coalesce; 940 u_long fr_tcp_frag; 941 u_long fr_tcp_pullup; 942 u_long fr_tcp_short; 943 u_long fr_tcp_small; 944 u_long fr_tcp_bad_flags; 945 u_long fr_udp_pullup; 946 u_long fr_ip_freed; 947 u_long fr_v6_ah_bad; 948 u_long fr_v6_bad; 949 u_long fr_v6_badfrag; 950 u_long fr_v6_dst_bad; 951 u_long fr_v6_esp_pullup; 952 u_long fr_v6_ext_short; 953 u_long fr_v6_ext_pullup; 954 u_long fr_v6_ext_hlen; 955 u_long fr_v6_frag_bad; 956 u_long fr_v6_frag_pullup; 957 u_long fr_v6_frag_size; 958 u_long fr_v6_gre_pullup; 959 u_long fr_v6_icmp6_pullup; 960 u_long fr_v6_rh_bad; 961 u_long fr_v6_badttl; /* TTL in packet doesn't reach minimum */ 962 u_long fr_v4_ah_bad; 963 u_long fr_v4_ah_pullup; 964 u_long fr_v4_esp_pullup; 965 u_long fr_v4_cipso_bad; 966 u_long fr_v4_cipso_tlen; 967 u_long fr_v4_gre_frag; 968 u_long fr_v4_gre_pullup; 969 u_long fr_v4_icmp_frag; 970 u_long fr_v4_icmp_pullup; 971 u_long fr_v4_badttl; /* TTL in packet doesn't reach minimum */ 972 u_long fr_v4_badsrc; /* source received doesn't match route */ 973 u_long fr_l4_badcksum; /* layer 4 header checksum failure */ 974 u_long fr_badcoalesces; 975 u_long fr_pass; /* packets allowed */ 976 u_long fr_block; /* packets denied */ 977 u_long fr_nom; /* packets which don't match any rule */ 978 u_long fr_short; /* packets which are short */ 979 u_long fr_ppkl; /* packets allowed and logged */ 980 u_long fr_bpkl; /* packets denied and logged */ 981 u_long fr_npkl; /* packets unmatched and logged */ 982 u_long fr_ret; /* packets for which a return is sent */ 983 u_long fr_acct; /* packets for which counting was performed */ 984 u_long fr_bnfr; /* bad attempts to allocate fragment state */ 985 u_long fr_nfr; /* new fragment state kept */ 986 u_long fr_cfr; /* add new fragment state but complete pkt */ 987 u_long fr_bads; /* bad attempts to allocate packet state */ 988 u_long fr_ads; /* new packet state kept */ 989 u_long fr_chit; /* cached hit */ 990 u_long fr_cmiss; /* cached miss */ 991 u_long fr_tcpbad; /* TCP checksum check failures */ 992 u_long fr_pull[2]; /* good and bad pullup attempts */ 993 u_long fr_bad; /* bad IP packets to the filter */ 994 u_long fr_ipv6; /* IPv6 packets in/out */ 995 u_long fr_ppshit; /* dropped because of pps ceiling */ 996 u_long fr_ipud; /* IP id update failures */ 997 u_long fr_blocked[FRB_MAX_VALUE + 1]; 998 } ipf_statistics_t; 999 1000 /* 1001 * Log structure. Each packet header logged is prepended by one of these. 1002 * Following this in the log records read from the device will be an ipflog 1003 * structure which is then followed by any packet data. 1004 */ 1005 typedef struct iplog { 1006 u_32_t ipl_magic; 1007 u_int ipl_count; 1008 u_32_t ipl_seqnum; 1009 struct timeval ipl_time; 1010 size_t ipl_dsize; 1011 struct iplog *ipl_next; 1012 } iplog_t; 1013 1014 #define ipl_sec ipl_time.tv_sec 1015 #define ipl_usec ipl_time.tv_usec 1016 1017 #define IPL_MAGIC 0x49504c4d /* 'IPLM' */ 1018 #define IPL_MAGIC_NAT 0x49504c4e /* 'IPLN' */ 1019 #define IPL_MAGIC_STATE 0x49504c53 /* 'IPLS' */ 1020 #define IPLOG_SIZE sizeof(iplog_t) 1021 1022 typedef struct ipflog { 1023 u_int fl_unit; 1024 u_32_t fl_rule; 1025 u_32_t fl_flags; 1026 u_32_t fl_lflags; 1027 u_32_t fl_logtag; 1028 ipftag_t fl_nattag; 1029 u_short fl_plen; /* extra data after hlen */ 1030 u_short fl_loglevel; /* syslog log level */ 1031 char fl_group[FR_GROUPLEN]; 1032 u_char fl_hlen; /* length of IP headers saved */ 1033 u_char fl_dir; 1034 u_char fl_breason; /* from fin_reason */ 1035 u_char fl_family; /* address family of packet logged */ 1036 char fl_ifname[LIFNAMSIZ]; 1037 } ipflog_t; 1038 1039 #ifndef IPF_LOGGING 1040 # define IPF_LOGGING 0 1041 #endif 1042 #ifndef IPF_DEFAULT_PASS 1043 # define IPF_DEFAULT_PASS FR_PASS 1044 #endif 1045 1046 #define DEFAULT_IPFLOGSIZE 32768 1047 #ifndef IPFILTER_LOGSIZE 1048 # define IPFILTER_LOGSIZE DEFAULT_IPFLOGSIZE 1049 #else 1050 # if IPFILTER_LOGSIZE < 8192 1051 # error IPFILTER_LOGSIZE too small. Must be >= 8192 1052 # endif 1053 #endif 1054 1055 #define IPF_OPTCOPY 0x07ff00 /* bit mask of copied options */ 1056 1057 /* 1058 * Device filenames for reading log information. Use ipf on Solaris2 because 1059 * ipl is already a name used by something else. 1060 */ 1061 #ifndef IPL_NAME 1062 # if SOLARIS 1063 # define IPL_NAME "/dev/ipf" 1064 # else 1065 # define IPL_NAME "/dev/ipl" 1066 # endif 1067 #endif 1068 /* 1069 * Pathnames for various IP Filter control devices. Used by LKM 1070 * and userland, so defined here. 1071 */ 1072 #define IPNAT_NAME "/dev/ipnat" 1073 #define IPSTATE_NAME "/dev/ipstate" 1074 #define IPAUTH_NAME "/dev/ipauth" 1075 #define IPSYNC_NAME "/dev/ipsync" 1076 #define IPSCAN_NAME "/dev/ipscan" 1077 #define IPLOOKUP_NAME "/dev/iplookup" 1078 1079 #define IPL_LOGIPF 0 /* Minor device #'s for accessing logs */ 1080 #define IPL_LOGNAT 1 1081 #define IPL_LOGSTATE 2 1082 #define IPL_LOGAUTH 3 1083 #define IPL_LOGSYNC 4 1084 #define IPL_LOGSCAN 5 1085 #define IPL_LOGLOOKUP 6 1086 #define IPL_LOGCOUNT 7 1087 #define IPL_LOGMAX 7 1088 #define IPL_LOGSIZE IPL_LOGMAX + 1 1089 #define IPL_LOGALL -1 1090 #define IPL_LOGNONE -2 1091 1092 /* 1093 * For SIOCGETFS 1094 */ 1095 typedef struct friostat { 1096 ipf_statistics_t f_st[2]; 1097 frentry_t *f_ipf[2][2]; 1098 frentry_t *f_acct[2][2]; 1099 frentry_t *f_auth; 1100 struct frgroup *f_groups[IPL_LOGSIZE][2]; 1101 u_long f_froute[2]; 1102 u_long f_log_ok; 1103 u_long f_log_fail; 1104 u_long f_rb_no_mem; 1105 u_long f_rb_node_max; 1106 u_32_t f_ticks; 1107 int f_locks[IPL_LOGSIZE]; 1108 int f_defpass; /* default pass - from fr_pass */ 1109 int f_active; /* 1 or 0 - active rule set */ 1110 int f_running; /* 1 if running, else 0 */ 1111 int f_logging; /* 1 if enabled, else 0 */ 1112 int f_features; 1113 char f_version[32]; /* version string */ 1114 } friostat_t; 1115 1116 #define f_fin f_ipf[0] 1117 #define f_fout f_ipf[1] 1118 #define f_acctin f_acct[0] 1119 #define f_acctout f_acct[1] 1120 1121 #define IPF_FEAT_LKM 0x001 1122 #define IPF_FEAT_LOG 0x002 1123 #define IPF_FEAT_LOOKUP 0x004 1124 #define IPF_FEAT_BPF 0x008 1125 #define IPF_FEAT_COMPILED 0x010 1126 #define IPF_FEAT_CKSUM 0x020 1127 #define IPF_FEAT_SYNC 0x040 1128 #define IPF_FEAT_SCAN 0x080 1129 #define IPF_FEAT_IPV6 0x100 1130 1131 typedef struct optlist { 1132 u_short ol_val; 1133 int ol_bit; 1134 } optlist_t; 1135 1136 1137 /* 1138 * Group list structure. 1139 */ 1140 typedef struct frgroup { 1141 struct frgroup *fg_next; 1142 struct frentry *fg_head; 1143 struct frentry *fg_start; 1144 struct frgroup **fg_set; 1145 u_32_t fg_flags; 1146 int fg_ref; 1147 char fg_name[FR_GROUPLEN]; 1148 } frgroup_t; 1149 1150 #define FG_NAME(g) (*(g)->fg_name == '\0' ? "" : (g)->fg_name) 1151 1152 1153 /* 1154 * Used by state and NAT tables 1155 */ 1156 typedef struct icmpinfo { 1157 u_short ici_id; 1158 u_short ici_seq; 1159 u_char ici_type; 1160 } icmpinfo_t; 1161 1162 typedef struct udpinfo { 1163 u_short us_sport; 1164 u_short us_dport; 1165 } udpinfo_t; 1166 1167 1168 typedef struct tcpdata { 1169 u_32_t td_end; 1170 u_32_t td_maxend; 1171 u_32_t td_maxwin; 1172 u_32_t td_winscale; 1173 u_32_t td_maxseg; 1174 int td_winflags; 1175 } tcpdata_t; 1176 1177 #define TCP_WSCALE_MAX 14 1178 1179 #define TCP_WSCALE_SEEN 0x00000001 1180 #define TCP_WSCALE_FIRST 0x00000002 1181 #define TCP_SACK_PERMIT 0x00000004 1182 1183 1184 typedef struct tcpinfo { 1185 u_32_t ts_sport; 1186 u_32_t ts_dport; 1187 tcpdata_t ts_data[2]; 1188 } tcpinfo_t; 1189 1190 1191 /* 1192 * Structures to define a GRE header as seen in a packet. 1193 */ 1194 struct grebits { 1195 #if defined(sparc) 1196 u_32_t grb_ver:3; 1197 u_32_t grb_flags:3; 1198 u_32_t grb_A:1; 1199 u_32_t grb_recur:1; 1200 u_32_t grb_s:1; 1201 u_32_t grb_S:1; 1202 u_32_t grb_K:1; 1203 u_32_t grb_R:1; 1204 u_32_t grb_C:1; 1205 #else 1206 u_32_t grb_C:1; 1207 u_32_t grb_R:1; 1208 u_32_t grb_K:1; 1209 u_32_t grb_S:1; 1210 u_32_t grb_s:1; 1211 u_32_t grb_recur:1; 1212 u_32_t grb_A:1; 1213 u_32_t grb_flags:3; 1214 u_32_t grb_ver:3; 1215 #endif 1216 u_short grb_ptype; 1217 }; 1218 1219 typedef struct grehdr { 1220 union { 1221 struct grebits gru_bits; 1222 u_short gru_flags; 1223 } gr_un; 1224 u_short gr_len; 1225 u_short gr_call; 1226 } grehdr_t; 1227 1228 #define gr_flags gr_un.gru_flags 1229 #define gr_bits gr_un.gru_bits 1230 #define gr_ptype gr_bits.grb_ptype 1231 #define gr_C gr_bits.grb_C 1232 #define gr_R gr_bits.grb_R 1233 #define gr_K gr_bits.grb_K 1234 #define gr_S gr_bits.grb_S 1235 #define gr_s gr_bits.grb_s 1236 #define gr_recur gr_bits.grb_recur 1237 #define gr_A gr_bits.grb_A 1238 #define gr_ver gr_bits.grb_ver 1239 1240 /* 1241 * GRE information tracked by "keep state" 1242 */ 1243 typedef struct greinfo { 1244 u_short gs_call[2]; 1245 u_short gs_flags; 1246 u_short gs_ptype; 1247 } greinfo_t; 1248 1249 #define GRE_REV(x) ((ntohs(x) >> 13) & 7) 1250 1251 1252 /* 1253 * Format of an Authentication header 1254 */ 1255 typedef struct authhdr { 1256 u_char ah_next; 1257 u_char ah_plen; 1258 u_short ah_reserved; 1259 u_32_t ah_spi; 1260 u_32_t ah_seq; 1261 /* Following the sequence number field is 0 or more bytes of */ 1262 /* authentication data, as specified by ah_plen - RFC 2402. */ 1263 } authhdr_t; 1264 1265 1266 /* 1267 * Timeout tail queue list member 1268 */ 1269 typedef struct ipftqent { 1270 struct ipftqent **tqe_pnext; 1271 struct ipftqent *tqe_next; 1272 struct ipftq *tqe_ifq; 1273 void *tqe_parent; /* pointer back to NAT/state struct */ 1274 u_32_t tqe_die; /* when this entriy is to die */ 1275 u_32_t tqe_touched; 1276 int tqe_flags; 1277 int tqe_state[2]; /* current state of this entry */ 1278 } ipftqent_t; 1279 1280 #define TQE_RULEBASED 0x00000001 1281 #define TQE_DELETE 0x00000002 1282 1283 1284 /* 1285 * Timeout tail queue head for IPFilter 1286 */ 1287 typedef struct ipftq { 1288 ipfmutex_t ifq_lock; 1289 u_int ifq_ttl; 1290 ipftqent_t *ifq_head; 1291 ipftqent_t **ifq_tail; 1292 struct ipftq *ifq_next; 1293 struct ipftq **ifq_pnext; 1294 int ifq_ref; 1295 u_int ifq_flags; 1296 } ipftq_t; 1297 1298 #define IFQF_USER 0x01 /* User defined aging */ 1299 #define IFQF_DELETE 0x02 /* Marked for deletion */ 1300 #define IFQF_PROXY 0x04 /* Timeout queue in use by a proxy */ 1301 1302 #define IPFTQ_INIT(x,y,z) do { \ 1303 (x)->ifq_ttl = (y); \ 1304 (x)->ifq_head = NULL; \ 1305 (x)->ifq_ref = 1; \ 1306 (x)->ifq_tail = &(x)->ifq_head; \ 1307 MUTEX_INIT(&(x)->ifq_lock, (z)); \ 1308 } while (0) 1309 1310 #define IPF_HZ_MULT 1 1311 #define IPF_HZ_DIVIDE 2 /* How many times a second ipfilter */ 1312 /* checks its timeout queues. */ 1313 #define IPF_TTLVAL(x) (((x) / IPF_HZ_MULT) * IPF_HZ_DIVIDE) 1314 1315 typedef int (*ipftq_delete_fn_t)(struct ipf_main_softc_s *, void *); 1316 1317 1318 /* 1319 * Object structure description. For passing through in ioctls. 1320 */ 1321 typedef struct ipfobj { 1322 u_32_t ipfo_rev; /* IPFilter version number */ 1323 u_32_t ipfo_size; /* size of object at ipfo_ptr */ 1324 void *ipfo_ptr; /* pointer to object */ 1325 int ipfo_type; /* type of object being pointed to */ 1326 int ipfo_offset; /* bytes from ipfo_ptr where to start */ 1327 int ipfo_retval; /* return value */ 1328 u_char ipfo_xxxpad[28]; /* reserved for future use */ 1329 } ipfobj_t; 1330 1331 #define IPFOBJ_FRENTRY 0 /* struct frentry */ 1332 #define IPFOBJ_IPFSTAT 1 /* struct friostat */ 1333 #define IPFOBJ_IPFINFO 2 /* struct fr_info */ 1334 #define IPFOBJ_AUTHSTAT 3 /* struct fr_authstat */ 1335 #define IPFOBJ_FRAGSTAT 4 /* struct ipfrstat */ 1336 #define IPFOBJ_IPNAT 5 /* struct ipnat */ 1337 #define IPFOBJ_NATSTAT 6 /* struct natstat */ 1338 #define IPFOBJ_STATESAVE 7 /* struct ipstate_save */ 1339 #define IPFOBJ_NATSAVE 8 /* struct nat_save */ 1340 #define IPFOBJ_NATLOOKUP 9 /* struct natlookup */ 1341 #define IPFOBJ_IPSTATE 10 /* struct ipstate */ 1342 #define IPFOBJ_STATESTAT 11 /* struct ips_stat */ 1343 #define IPFOBJ_FRAUTH 12 /* struct frauth */ 1344 #define IPFOBJ_TUNEABLE 13 /* struct ipftune */ 1345 #define IPFOBJ_NAT 14 /* struct nat */ 1346 #define IPFOBJ_IPFITER 15 /* struct ipfruleiter */ 1347 #define IPFOBJ_GENITER 16 /* struct ipfgeniter */ 1348 #define IPFOBJ_GTABLE 17 /* struct ipftable */ 1349 #define IPFOBJ_LOOKUPITER 18 /* struct ipflookupiter */ 1350 #define IPFOBJ_STATETQTAB 19 /* struct ipftq * NSTATES */ 1351 #define IPFOBJ_IPFEXPR 20 1352 #define IPFOBJ_PROXYCTL 21 /* strct ap_ctl */ 1353 #define IPFOBJ_FRIPF 22 /* structfripf */ 1354 #define IPFOBJ_COUNT 23 /* How many #defines are above this? */ 1355 1356 1357 typedef union ipftunevalptr { 1358 void *ipftp_void; 1359 u_long *ipftp_long; 1360 u_int *ipftp_int; 1361 u_short *ipftp_short; 1362 u_char *ipftp_char; 1363 u_long ipftp_offset; 1364 } ipftunevalptr_t; 1365 1366 typedef union ipftuneval { 1367 u_long ipftu_long; 1368 u_int ipftu_int; 1369 u_short ipftu_short; 1370 u_char ipftu_char; 1371 } ipftuneval_t; 1372 1373 struct ipftuneable; 1374 typedef int (* ipftunefunc_t) __P((struct ipf_main_softc_s *, struct ipftuneable *, ipftuneval_t *)); 1375 1376 typedef struct ipftuneable { 1377 ipftunevalptr_t ipft_una; 1378 const char *ipft_name; 1379 u_long ipft_min; 1380 u_long ipft_max; 1381 int ipft_sz; 1382 int ipft_flags; 1383 struct ipftuneable *ipft_next; 1384 ipftunefunc_t ipft_func; 1385 } ipftuneable_t; 1386 1387 #define ipft_addr ipft_una.ipftp_void 1388 #define ipft_plong ipft_una.ipftp_long 1389 #define ipft_pint ipft_una.ipftp_int 1390 #define ipft_pshort ipft_una.ipftp_short 1391 #define ipft_pchar ipft_una.ipftp_char 1392 1393 #define IPFT_RDONLY 1 /* read-only */ 1394 #define IPFT_WRDISABLED 2 /* write when disabled only */ 1395 1396 typedef struct ipftune { 1397 void *ipft_cookie; 1398 ipftuneval_t ipft_un; 1399 u_long ipft_min; 1400 u_long ipft_max; 1401 int ipft_sz; 1402 int ipft_flags; 1403 char ipft_name[80]; 1404 } ipftune_t; 1405 1406 #define ipft_vlong ipft_un.ipftu_long 1407 #define ipft_vint ipft_un.ipftu_int 1408 #define ipft_vshort ipft_un.ipftu_short 1409 #define ipft_vchar ipft_un.ipftu_char 1410 1411 /* 1412 * Hash table header 1413 */ 1414 #define IPFHASH(x,y) typedef struct { \ 1415 ipfrwlock_t ipfh_lock; \ 1416 struct x *ipfh_head; \ 1417 } y 1418 1419 /* 1420 ** HPUX Port 1421 */ 1422 1423 #if !defined(CDEV_MAJOR) && defined (__FreeBSD_version) && \ 1424 (__FreeBSD_version >= 220000) 1425 # define CDEV_MAJOR 79 1426 #endif 1427 1428 #ifdef _KERNEL 1429 # define FR_VERBOSE(verb_pr) 1430 # define FR_DEBUG(verb_pr) 1431 #else 1432 extern void ipfkdebug __P((char *, ...)); 1433 extern void ipfkverbose __P((char *, ...)); 1434 # define FR_VERBOSE(verb_pr) ipfkverbose verb_pr 1435 # define FR_DEBUG(verb_pr) ipfkdebug verb_pr 1436 #endif 1437 1438 /* 1439 * 1440 */ 1441 typedef struct ipfruleiter { 1442 int iri_inout; 1443 char iri_group[FR_GROUPLEN]; 1444 int iri_active; 1445 int iri_nrules; 1446 int iri_v; /* No longer used (compatibility) */ 1447 frentry_t *iri_rule; 1448 } ipfruleiter_t; 1449 1450 /* 1451 * Values for iri_inout 1452 */ 1453 #define F_IN 0 1454 #define F_OUT 1 1455 #define F_ACIN 2 1456 #define F_ACOUT 3 1457 1458 1459 typedef struct ipfgeniter { 1460 int igi_type; 1461 int igi_nitems; 1462 void *igi_data; 1463 } ipfgeniter_t; 1464 1465 #define IPFGENITER_IPF 0 1466 #define IPFGENITER_NAT 1 1467 #define IPFGENITER_IPNAT 2 1468 #define IPFGENITER_FRAG 3 1469 #define IPFGENITER_AUTH 4 1470 #define IPFGENITER_STATE 5 1471 #define IPFGENITER_NATFRAG 6 1472 #define IPFGENITER_HOSTMAP 7 1473 #define IPFGENITER_LOOKUP 8 1474 1475 typedef struct ipftable { 1476 int ita_type; 1477 void *ita_table; 1478 } ipftable_t; 1479 1480 #define IPFTABLE_BUCKETS 1 1481 #define IPFTABLE_BUCKETS_NATIN 2 1482 #define IPFTABLE_BUCKETS_NATOUT 3 1483 1484 1485 typedef struct ipf_v4_masktab_s { 1486 u_32_t imt4_active[33]; 1487 int imt4_masks[33]; 1488 int imt4_max; 1489 } ipf_v4_masktab_t; 1490 1491 typedef struct ipf_v6_masktab_s { 1492 i6addr_t imt6_active[129]; 1493 int imt6_masks[129]; 1494 int imt6_max; 1495 } ipf_v6_masktab_t; 1496 1497 1498 /* 1499 * 1500 */ 1501 typedef struct ipftoken { 1502 struct ipftoken *ipt_next; 1503 struct ipftoken **ipt_pnext; 1504 void *ipt_ctx; 1505 void *ipt_data; 1506 u_long ipt_die; 1507 int ipt_type; 1508 int ipt_uid; 1509 int ipt_subtype; 1510 int ipt_ref; 1511 int ipt_complete; 1512 } ipftoken_t; 1513 1514 1515 /* 1516 * 1517 */ 1518 typedef struct ipfexp { 1519 int ipfe_cmd; 1520 int ipfe_not; 1521 int ipfe_narg; 1522 int ipfe_size; 1523 int ipfe_arg0[1]; 1524 } ipfexp_t; 1525 1526 /* 1527 * Currently support commands (ipfe_cmd) 1528 * 32bits is split up follows: 1529 * aabbcccc 1530 * aa = 0 = packet matching, 1 = meta data matching 1531 * bb = IP protocol number 1532 * cccc = command 1533 */ 1534 #define IPF_EXP_IP_PR 0x00000001 1535 #define IPF_EXP_IP_ADDR 0x00000002 1536 #define IPF_EXP_IP_SRCADDR 0x00000003 1537 #define IPF_EXP_IP_DSTADDR 0x00000004 1538 #define IPF_EXP_IP6_ADDR 0x00000005 1539 #define IPF_EXP_IP6_SRCADDR 0x00000006 1540 #define IPF_EXP_IP6_DSTADDR 0x00000007 1541 #define IPF_EXP_TCP_FLAGS 0x00060001 1542 #define IPF_EXP_TCP_PORT 0x00060002 1543 #define IPF_EXP_TCP_SPORT 0x00060003 1544 #define IPF_EXP_TCP_DPORT 0x00060004 1545 #define IPF_EXP_UDP_PORT 0x00110002 1546 #define IPF_EXP_UDP_SPORT 0x00110003 1547 #define IPF_EXP_UDP_DPORT 0x00110004 1548 #define IPF_EXP_IDLE_GT 0x01000001 1549 #define IPF_EXP_TCP_STATE 0x01060002 1550 #define IPF_EXP_END 0xffffffff 1551 1552 #define ONE_DAY IPF_TTLVAL(1 * 86400) /* 1 day */ 1553 #define FIVE_DAYS (5 * ONE_DAY) 1554 1555 typedef struct ipf_main_softc_s { 1556 struct ipf_main_softc_s *ipf_next; 1557 ipfmutex_t ipf_rw; 1558 ipfmutex_t ipf_timeoutlock; 1559 ipfrwlock_t ipf_mutex; 1560 ipfrwlock_t ipf_frag; 1561 ipfrwlock_t ipf_global; 1562 ipfrwlock_t ipf_tokens; 1563 ipfrwlock_t ipf_state; 1564 ipfrwlock_t ipf_nat; 1565 ipfrwlock_t ipf_natfrag; 1566 ipfrwlock_t ipf_poolrw; 1567 int ipf_dynamic_softc; 1568 int ipf_refcnt; 1569 int ipf_running; 1570 int ipf_flags; 1571 int ipf_active; 1572 int ipf_control_forwarding; 1573 int ipf_update_ipid; 1574 int ipf_chksrc; /* causes a system crash if enabled */ 1575 int ipf_pass; 1576 int ipf_minttl; 1577 int ipf_icmpminfragmtu; 1578 int ipf_interror; /* Should be in a struct that is per */ 1579 /* thread or process. Does not belong */ 1580 /* here but there's a lot more work */ 1581 /* in doing that properly. For now, */ 1582 /* it is squatting. */ 1583 u_int ipf_tcpidletimeout; 1584 u_int ipf_tcpclosewait; 1585 u_int ipf_tcplastack; 1586 u_int ipf_tcptimewait; 1587 u_int ipf_tcptimeout; 1588 u_int ipf_tcpsynsent; 1589 u_int ipf_tcpsynrecv; 1590 u_int ipf_tcpclosed; 1591 u_int ipf_tcphalfclosed; 1592 u_int ipf_udptimeout; 1593 u_int ipf_udpacktimeout; 1594 u_int ipf_icmptimeout; 1595 u_int ipf_icmpacktimeout; 1596 u_int ipf_iptimeout; 1597 u_long ipf_ticks; 1598 u_long ipf_userifqs; 1599 u_long ipf_rb_no_mem; 1600 u_long ipf_rb_node_max; 1601 u_long ipf_frouteok[2]; 1602 ipftuneable_t *ipf_tuners; 1603 void *ipf_frag_soft; 1604 void *ipf_nat_soft; 1605 void *ipf_state_soft; 1606 void *ipf_auth_soft; 1607 void *ipf_proxy_soft; 1608 void *ipf_sync_soft; 1609 void *ipf_lookup_soft; 1610 void *ipf_log_soft; 1611 struct frgroup *ipf_groups[IPL_LOGSIZE][2]; 1612 frentry_t *ipf_rules[2][2]; 1613 frentry_t *ipf_acct[2][2]; 1614 frentry_t *ipf_rule_explist[2]; 1615 ipftoken_t *ipf_token_head; 1616 ipftoken_t **ipf_token_tail; 1617 #if defined(__FreeBSD_version) && defined(_KERNEL) 1618 struct callout ipf_slow_ch; 1619 #endif 1620 #if NETBSD_GE_REV(104040000) 1621 struct callout ipf_slow_ch; 1622 #endif 1623 #if SOLARIS 1624 timeout_id_t ipf_slow_ch; 1625 #endif 1626 #if defined(_KERNEL) 1627 # if SOLARIS 1628 struct pollhead ipf_poll_head[IPL_LOGSIZE]; 1629 void *ipf_dip; 1630 # if defined(INSTANCES) 1631 int ipf_get_loopback; 1632 u_long ipf_idnum; 1633 net_handle_t ipf_nd_v4; 1634 net_handle_t ipf_nd_v6; 1635 hook_t *ipf_hk_v4_in; 1636 hook_t *ipf_hk_v4_out; 1637 hook_t *ipf_hk_v4_nic; 1638 hook_t *ipf_hk_v6_in; 1639 hook_t *ipf_hk_v6_out; 1640 hook_t *ipf_hk_v6_nic; 1641 hook_t *ipf_hk_loop_v4_in; 1642 hook_t *ipf_hk_loop_v4_out; 1643 hook_t *ipf_hk_loop_v6_in; 1644 hook_t *ipf_hk_loop_v6_out; 1645 # endif 1646 # else 1647 struct selinfo ipf_selwait[IPL_LOGSIZE]; 1648 # endif 1649 #endif 1650 void *ipf_slow; 1651 ipf_statistics_t ipf_stats[2]; 1652 u_char ipf_iss_secret[32]; 1653 u_short ipf_ip_id; 1654 } ipf_main_softc_t; 1655 1656 #define IPFERROR(_e) do { softc->ipf_interror = (_e); \ 1657 DT1(user_error, int, _e); \ 1658 } while (0) 1659 1660 #ifndef _KERNEL 1661 extern int ipf_check __P((void *, struct ip *, int, struct ifnet *, int, mb_t **)); 1662 extern struct ifnet *get_unit __P((char *, int)); 1663 extern char *get_ifname __P((struct ifnet *)); 1664 extern int ipfioctl __P((ipf_main_softc_t *, int, ioctlcmd_t, 1665 caddr_t, int)); 1666 extern void m_freem __P((mb_t *)); 1667 extern size_t msgdsize __P((mb_t *)); 1668 extern int bcopywrap __P((void *, void *, size_t)); 1669 extern void ip_fillid(struct ip *); 1670 #else /* #ifndef _KERNEL */ 1671 # if defined(__NetBSD__) && defined(PFIL_HOOKS) 1672 extern void ipfilterattach __P((int)); 1673 # endif 1674 extern int ipl_enable __P((void)); 1675 extern int ipl_disable __P((void)); 1676 # ifdef MENTAT 1677 /* XXX MENTAT is always defined for Solaris */ 1678 extern int ipf_check __P((void *, struct ip *, int, struct ifnet *, int, void *, 1679 mblk_t **)); 1680 # if SOLARIS 1681 extern void ipf_prependmbt(fr_info_t *, mblk_t *); 1682 extern int ipfioctl __P((dev_t, int, intptr_t, int, cred_t *, int *)); 1683 # endif 1684 extern int ipf_qout __P((queue_t *, mblk_t *)); 1685 # else /* MENTAT */ 1686 /* XXX MENTAT is never defined for FreeBSD & NetBSD */ 1687 extern int ipf_check __P((void *, struct ip *, int, struct ifnet *, int, mb_t **)); 1688 extern int (*fr_checkp) __P((ip_t *, int, void *, int, mb_t **)); 1689 extern size_t mbufchainlen __P((mb_t *)); 1690 # ifdef IPFILTER_LKM 1691 extern int ipf_identify __P((char *)); 1692 # endif 1693 # if defined(__FreeBSD_version) 1694 extern int ipfioctl __P((struct cdev*, u_long, caddr_t, int, struct thread *)); 1695 # elif defined(__NetBSD__) 1696 extern int ipfioctl __P((dev_t, u_long, void *, int, struct lwp *)); 1697 # endif 1698 # endif /* MENTAT */ 1699 1700 # if defined(__FreeBSD_version) 1701 extern int ipf_pfil_hook __P((void)); 1702 extern int ipf_pfil_unhook __P((void)); 1703 extern void ipf_event_reg __P((void)); 1704 extern void ipf_event_dereg __P((void)); 1705 # endif 1706 1707 # if defined(INSTANCES) 1708 extern ipf_main_softc_t *ipf_find_softc __P((u_long)); 1709 extern int ipf_set_loopback __P((ipf_main_softc_t *, ipftuneable_t *, 1710 ipftuneval_t *)); 1711 # endif 1712 1713 #endif /* #ifndef _KERNEL */ 1714 1715 extern char *memstr __P((const char *, char *, size_t, size_t)); 1716 extern int count4bits __P((u_32_t)); 1717 #ifdef USE_INET6 1718 extern int count6bits __P((u_32_t *)); 1719 #endif 1720 extern int frrequest __P((ipf_main_softc_t *, int, ioctlcmd_t, caddr_t, 1721 int, int)); 1722 extern char *getifname __P((struct ifnet *)); 1723 extern int ipfattach __P((ipf_main_softc_t *)); 1724 extern int ipfdetach __P((ipf_main_softc_t *)); 1725 extern u_short ipf_cksum __P((u_short *, int)); 1726 extern int copyinptr __P((ipf_main_softc_t *, void *, void *, size_t)); 1727 extern int copyoutptr __P((ipf_main_softc_t *, void *, void *, size_t)); 1728 extern int ipf_fastroute __P((mb_t *, mb_t **, fr_info_t *, frdest_t *)); 1729 extern int ipf_inject __P((fr_info_t *, mb_t *)); 1730 extern int ipf_inobj __P((ipf_main_softc_t *, void *, ipfobj_t *, 1731 void *, int)); 1732 extern int ipf_inobjsz __P((ipf_main_softc_t *, void *, void *, 1733 int , int)); 1734 extern int ipf_ioctlswitch __P((ipf_main_softc_t *, int, void *, 1735 ioctlcmd_t, int, int, void *)); 1736 extern int ipf_ipf_ioctl __P((ipf_main_softc_t *, caddr_t, ioctlcmd_t, 1737 int, int, void *)); 1738 extern int ipf_ipftune __P((ipf_main_softc_t *, ioctlcmd_t, void *)); 1739 extern int ipf_matcharray_load __P((ipf_main_softc_t *, caddr_t, 1740 ipfobj_t *, int **)); 1741 extern int ipf_matcharray_verify __P((int *, int)); 1742 extern int ipf_outobj __P((ipf_main_softc_t *, void *, void *, int)); 1743 extern int ipf_outobjk __P((ipf_main_softc_t *, ipfobj_t *, void *)); 1744 extern int ipf_outobjsz __P((ipf_main_softc_t *, void *, void *, 1745 int, int)); 1746 extern void *ipf_pullup __P((mb_t *, fr_info_t *, int)); 1747 extern int ipf_resolvedest __P((ipf_main_softc_t *, char *, 1748 struct frdest *, int)); 1749 extern int ipf_resolvefunc __P((ipf_main_softc_t *, void *)); 1750 extern void *ipf_resolvenic __P((ipf_main_softc_t *, char *, int)); 1751 extern int ipf_send_icmp_err __P((int, fr_info_t *, int)); 1752 extern int ipf_send_reset __P((fr_info_t *)); 1753 extern void ipf_apply_timeout __P((ipftq_t *, u_int)); 1754 extern ipftq_t *ipf_addtimeoutqueue __P((ipf_main_softc_t *, ipftq_t **, 1755 u_int)); 1756 extern void ipf_deletequeueentry __P((ipftqent_t *)); 1757 extern int ipf_deletetimeoutqueue __P((ipftq_t *)); 1758 extern void ipf_freetimeoutqueue __P((ipf_main_softc_t *, ipftq_t *)); 1759 extern void ipf_movequeue __P((u_long, ipftqent_t *, ipftq_t *, 1760 ipftq_t *)); 1761 extern void ipf_queueappend __P((u_long, ipftqent_t *, ipftq_t *, void *)); 1762 extern void ipf_queueback __P((u_long, ipftqent_t *)); 1763 extern int ipf_queueflush __P((ipf_main_softc_t *, ipftq_delete_fn_t, 1764 ipftq_t *, ipftq_t *, u_int *, int, int)); 1765 extern void ipf_queuefront __P((ipftqent_t *)); 1766 extern int ipf_settimeout_tcp __P((ipftuneable_t *, ipftuneval_t *, 1767 ipftq_t *)); 1768 extern int ipf_checkv4sum __P((fr_info_t *)); 1769 extern int ipf_checkl4sum __P((fr_info_t *)); 1770 extern int ipf_ifpfillv4addr __P((int, struct sockaddr_in *, 1771 struct sockaddr_in *, struct in_addr *, 1772 struct in_addr *)); 1773 extern int ipf_coalesce __P((fr_info_t *)); 1774 #ifdef USE_INET6 1775 extern int ipf_checkv6sum __P((fr_info_t *)); 1776 extern int ipf_ifpfillv6addr __P((int, struct sockaddr_in6 *, 1777 struct sockaddr_in6 *, i6addr_t *, 1778 i6addr_t *)); 1779 #endif 1780 1781 extern int ipf_tune_add __P((ipf_main_softc_t *, ipftuneable_t *)); 1782 extern int ipf_tune_add_array __P((ipf_main_softc_t *, ipftuneable_t *)); 1783 extern int ipf_tune_del __P((ipf_main_softc_t *, ipftuneable_t *)); 1784 extern int ipf_tune_del_array __P((ipf_main_softc_t *, ipftuneable_t *)); 1785 extern int ipf_tune_array_link __P((ipf_main_softc_t *, ipftuneable_t *)); 1786 extern int ipf_tune_array_unlink __P((ipf_main_softc_t *, 1787 ipftuneable_t *)); 1788 extern ipftuneable_t *ipf_tune_array_copy __P((void *, size_t, 1789 ipftuneable_t *)); 1790 1791 extern int ipf_pr_pullup __P((fr_info_t *, int)); 1792 1793 extern int ipf_flush __P((ipf_main_softc_t *, minor_t, int)); 1794 extern frgroup_t *ipf_group_add __P((ipf_main_softc_t *, char *, void *, 1795 u_32_t, minor_t, int)); 1796 extern void ipf_group_del __P((ipf_main_softc_t *, frgroup_t *, 1797 frentry_t *)); 1798 extern int ipf_derefrule __P((ipf_main_softc_t *, frentry_t **)); 1799 extern frgroup_t *ipf_findgroup __P((ipf_main_softc_t *, char *, minor_t, 1800 int, frgroup_t ***)); 1801 1802 extern int ipf_log_init __P((void)); 1803 extern int ipf_log_bytesused __P((ipf_main_softc_t *, int)); 1804 extern int ipf_log_canread __P((ipf_main_softc_t *, int)); 1805 extern int ipf_log_clear __P((ipf_main_softc_t *, minor_t)); 1806 extern u_long ipf_log_failures __P((ipf_main_softc_t *, int)); 1807 extern int ipf_log_read __P((ipf_main_softc_t *, minor_t, uio_t *)); 1808 extern int ipf_log_items __P((ipf_main_softc_t *, int, fr_info_t *, 1809 void **, size_t *, int *, int)); 1810 extern u_long ipf_log_logok __P((ipf_main_softc_t *, int)); 1811 extern void ipf_log_unload __P((ipf_main_softc_t *)); 1812 extern int ipf_log_pkt __P((fr_info_t *, u_int)); 1813 1814 extern frentry_t *ipf_acctpkt __P((fr_info_t *, u_32_t *)); 1815 extern u_short fr_cksum __P((fr_info_t *, ip_t *, int, void *)); 1816 extern void ipf_deinitialise __P((ipf_main_softc_t *)); 1817 extern int ipf_deliverlocal __P((ipf_main_softc_t *, int, void *, 1818 i6addr_t *)); 1819 extern frentry_t *ipf_dstgrpmap __P((fr_info_t *, u_32_t *)); 1820 extern void ipf_fixskip __P((frentry_t **, frentry_t *, int)); 1821 extern void ipf_forgetifp __P((ipf_main_softc_t *, void *)); 1822 extern frentry_t *ipf_getrulen __P((ipf_main_softc_t *, int, char *, 1823 u_32_t)); 1824 extern int ipf_ifpaddr __P((ipf_main_softc_t *, int, int, void *, 1825 i6addr_t *, i6addr_t *)); 1826 extern void ipf_inet_mask_add __P((int, ipf_v4_masktab_t *)); 1827 extern void ipf_inet_mask_del __P((int, ipf_v4_masktab_t *)); 1828 #ifdef USE_INET6 1829 extern void ipf_inet6_mask_add __P((int, i6addr_t *, 1830 ipf_v6_masktab_t *)); 1831 extern void ipf_inet6_mask_del __P((int, i6addr_t *, 1832 ipf_v6_masktab_t *)); 1833 #endif 1834 extern int ipf_initialise __P((void)); 1835 extern int ipf_lock __P((caddr_t, int *)); 1836 extern int ipf_makefrip __P((int, ip_t *, fr_info_t *)); 1837 extern int ipf_matchtag __P((ipftag_t *, ipftag_t *)); 1838 extern int ipf_matchicmpqueryreply __P((int, icmpinfo_t *, 1839 struct icmp *, int)); 1840 extern u_32_t ipf_newisn __P((fr_info_t *)); 1841 extern u_int ipf_pcksum __P((fr_info_t *, int, u_int)); 1842 extern void ipf_rule_expire __P((ipf_main_softc_t *)); 1843 extern int ipf_scanlist __P((fr_info_t *, u_32_t)); 1844 extern frentry_t *ipf_srcgrpmap __P((fr_info_t *, u_32_t *)); 1845 extern int ipf_tcpudpchk __P((fr_ip_t *, frtuc_t *)); 1846 extern int ipf_verifysrc __P((fr_info_t *fin)); 1847 extern int ipf_zerostats __P((ipf_main_softc_t *, char *)); 1848 extern int ipf_getnextrule __P((ipf_main_softc_t *, ipftoken_t *, 1849 void *)); 1850 extern int ipf_sync __P((ipf_main_softc_t *, void *)); 1851 extern int ipf_token_deref __P((ipf_main_softc_t *, ipftoken_t *)); 1852 extern void ipf_token_expire __P((ipf_main_softc_t *)); 1853 extern ipftoken_t *ipf_token_find __P((ipf_main_softc_t *, int, int, 1854 void *)); 1855 extern int ipf_token_del __P((ipf_main_softc_t *, int, int, 1856 void *)); 1857 extern void ipf_token_mark_complete __P((ipftoken_t *)); 1858 extern int ipf_genericiter __P((ipf_main_softc_t *, void *, 1859 int, void *)); 1860 #ifdef IPFILTER_LOOKUP 1861 extern void *ipf_resolvelookup __P((int, u_int, u_int, 1862 lookupfunc_t *)); 1863 #endif 1864 extern u_32_t ipf_random __P((void)); 1865 1866 extern int ipf_main_load __P((void)); 1867 extern void *ipf_main_soft_create __P((void *)); 1868 extern void ipf_main_soft_destroy __P((ipf_main_softc_t *)); 1869 extern int ipf_main_soft_init __P((ipf_main_softc_t *)); 1870 extern int ipf_main_soft_fini __P((ipf_main_softc_t *)); 1871 extern int ipf_main_unload __P((void)); 1872 extern int ipf_load_all __P((void)); 1873 extern int ipf_unload_all __P((void)); 1874 extern void ipf_destroy_all __P((ipf_main_softc_t *)); 1875 extern ipf_main_softc_t *ipf_create_all __P((void *)); 1876 extern int ipf_init_all __P((ipf_main_softc_t *)); 1877 extern int ipf_fini_all __P((ipf_main_softc_t *)); 1878 extern void ipf_log_soft_destroy __P((ipf_main_softc_t *, void *)); 1879 extern void *ipf_log_soft_create __P((ipf_main_softc_t *)); 1880 extern int ipf_log_soft_init __P((ipf_main_softc_t *, void *)); 1881 extern int ipf_log_soft_fini __P((ipf_main_softc_t *, void *)); 1882 extern int ipf_log_main_load __P((void)); 1883 extern int ipf_log_main_unload __P((void)); 1884 1885 1886 extern char ipfilter_version[]; 1887 #ifdef USE_INET6 1888 extern int icmptoicmp6types[ICMP_MAXTYPE+1]; 1889 extern int icmptoicmp6unreach[ICMP_MAX_UNREACH]; 1890 extern int icmpreplytype6[ICMP6_MAXTYPE + 1]; 1891 #endif 1892 #ifdef IPFILTER_COMPAT 1893 extern int ipf_in_compat __P((ipf_main_softc_t *, ipfobj_t *, void *,int)); 1894 extern int ipf_out_compat __P((ipf_main_softc_t *, ipfobj_t *, void *)); 1895 #endif 1896 extern int icmpreplytype4[ICMP_MAXTYPE + 1]; 1897 1898 extern int ipf_ht_node_add __P((ipf_main_softc_t *, host_track_t *, 1899 int, i6addr_t *)); 1900 extern int ipf_ht_node_del __P((host_track_t *, int, i6addr_t *)); 1901 extern void ipf_rb_ht_flush __P((host_track_t *)); 1902 extern void ipf_rb_ht_freenode __P((host_node_t *, void *)); 1903 extern void ipf_rb_ht_init __P((host_track_t *)); 1904 1905 #endif /* __IP_FIL_H__ */ 1906