fil.c revision 67614
1/* 2 * Copyright (C) 1993-2000 by Darren Reed. 3 * 4 * Redistribution and use in source and binary forms are permitted 5 * provided that this notice is preserved and due credit is given 6 * to the original author and the contributors. 7 */ 8#if !defined(lint) 9static const char sccsid[] = "@(#)fil.c 1.36 6/5/96 (C) 1993-1996 Darren Reed"; 10/* static const char rcsid[] = "@(#)$Id: fil.c,v 2.3.2.16 2000/01/27 08:49:37 darrenr Exp $"; */ 11static const char rcsid[] = "@(#)$FreeBSD: head/sys/contrib/ipfilter/netinet/fil.c 67614 2000-10-26 12:33:42Z darrenr $"; 12#endif 13 14#include <sys/errno.h> 15#include <sys/types.h> 16#include <sys/param.h> 17#include <sys/time.h> 18#include <sys/file.h> 19#if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \ 20 defined(_KERNEL) 21# include "opt_ipfilter_log.h" 22#endif 23#if (defined(KERNEL) || defined(_KERNEL)) && defined(__FreeBSD_version) && \ 24 (__FreeBSD_version >= 220000) 25# if (__FreeBSD_version >= 400000) 26# ifndef KLD_MODULE 27# include "opt_inet6.h" 28# endif 29# if (__FreeBSD_version == 400019) 30# define CSUM_DELAY_DATA 31# endif 32# endif 33# include <sys/filio.h> 34# include <sys/fcntl.h> 35#else 36# include <sys/ioctl.h> 37#endif 38#if (defined(_KERNEL) || defined(KERNEL)) && !defined(linux) 39# include <sys/systm.h> 40#else 41# include <stdio.h> 42# include <string.h> 43# include <stdlib.h> 44#endif 45#include <sys/uio.h> 46#if !defined(__SVR4) && !defined(__svr4__) 47# ifndef linux 48# include <sys/mbuf.h> 49# endif 50#else 51# include <sys/byteorder.h> 52# if SOLARIS2 < 5 53# include <sys/dditypes.h> 54# endif 55# include <sys/stream.h> 56#endif 57#ifndef linux 58# include <sys/protosw.h> 59# include <sys/socket.h> 60#endif 61#include <net/if.h> 62#ifdef sun 63# include <net/af.h> 64#endif 65#include <net/route.h> 66#include <netinet/in.h> 67#include <netinet/in_systm.h> 68#include <netinet/ip.h> 69#ifndef linux 70# include <netinet/ip_var.h> 71#endif 72#if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */ 73# include <sys/hashing.h> 74# include <netinet/in_var.h> 75#endif 76#include <netinet/tcp.h> 77#include <netinet/udp.h> 78#include <netinet/ip_icmp.h> 79#include "netinet/ip_compat.h" 80#ifdef USE_INET6 81# include <netinet/icmp6.h> 82# if !SOLARIS && defined(_KERNEL) 83# include <netinet6/in6_var.h> 84# endif 85#endif 86#include <netinet/tcpip.h> 87#include "netinet/ip_fil.h" 88#include "netinet/ip_proxy.h" 89#include "netinet/ip_nat.h" 90#include "netinet/ip_frag.h" 91#include "netinet/ip_state.h" 92#include "netinet/ip_auth.h" 93# if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000) 94# include <sys/malloc.h> 95# if defined(_KERNEL) && !defined(IPFILTER_LKM) 96# include "opt_ipfilter.h" 97# endif 98# endif 99#ifndef MIN 100# define MIN(a,b) (((a)<(b))?(a):(b)) 101#endif 102#include "netinet/ipl.h" 103 104#include <machine/in_cksum.h> 105 106#ifndef _KERNEL 107# include "ipf.h" 108# include "ipt.h" 109extern int opts; 110 111# define FR_VERBOSE(verb_pr) verbose verb_pr 112# define FR_DEBUG(verb_pr) debug verb_pr 113# define IPLLOG(a, c, d, e) ipllog() 114#else /* #ifndef _KERNEL */ 115# define FR_VERBOSE(verb_pr) 116# define FR_DEBUG(verb_pr) 117# define IPLLOG(a, c, d, e) ipflog(a, c, d, e) 118# if SOLARIS || defined(__sgi) 119extern KRWLOCK_T ipf_mutex, ipf_auth, ipf_nat; 120extern kmutex_t ipf_rw; 121# endif 122# if SOLARIS 123# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, \ 124 ip, qif) 125# else /* SOLARIS */ 126# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, ip) 127# endif /* SOLARIS || __sgi */ 128#endif /* _KERNEL */ 129 130 131struct filterstats frstats[2] = {{0,0,0,0,0},{0,0,0,0,0}}; 132struct frentry *ipfilter[2][2] = { { NULL, NULL }, { NULL, NULL } }, 133#ifdef USE_INET6 134 *ipfilter6[2][2] = { { NULL, NULL }, { NULL, NULL } }, 135 *ipacct6[2][2] = { { NULL, NULL }, { NULL, NULL } }, 136#endif 137 *ipacct[2][2] = { { NULL, NULL }, { NULL, NULL } }; 138struct frgroup *ipfgroups[3][2]; 139int fr_flags = IPF_LOGGING; 140int fr_active = 0; 141int fr_chksrc = 0; 142#if defined(IPFILTER_DEFAULT_BLOCK) 143int fr_pass = FR_NOMATCH|FR_BLOCK; 144#else 145int fr_pass = (IPF_DEFAULT_PASS|FR_NOMATCH); 146#endif 147char ipfilter_version[] = IPL_VERSION; 148 149fr_info_t frcache[2]; 150 151static int frflushlist __P((int, minor_t, int *, frentry_t **)); 152#ifdef _KERNEL 153static void frsynclist __P((frentry_t *)); 154#endif 155 156 157/* 158 * bit values for identifying presence of individual IP options 159 */ 160struct optlist ipopts[20] = { 161 { IPOPT_NOP, 0x000001 }, 162 { IPOPT_RR, 0x000002 }, 163 { IPOPT_ZSU, 0x000004 }, 164 { IPOPT_MTUP, 0x000008 }, 165 { IPOPT_MTUR, 0x000010 }, 166 { IPOPT_ENCODE, 0x000020 }, 167 { IPOPT_TS, 0x000040 }, 168 { IPOPT_TR, 0x000080 }, 169 { IPOPT_SECURITY, 0x000100 }, 170 { IPOPT_LSRR, 0x000200 }, 171 { IPOPT_E_SEC, 0x000400 }, 172 { IPOPT_CIPSO, 0x000800 }, 173 { IPOPT_SATID, 0x001000 }, 174 { IPOPT_SSRR, 0x002000 }, 175 { IPOPT_ADDEXT, 0x004000 }, 176 { IPOPT_VISA, 0x008000 }, 177 { IPOPT_IMITD, 0x010000 }, 178 { IPOPT_EIP, 0x020000 }, 179 { IPOPT_FINN, 0x040000 }, 180 { 0, 0x000000 } 181}; 182 183/* 184 * bit values for identifying presence of individual IP security options 185 */ 186struct optlist secopt[8] = { 187 { IPSO_CLASS_RES4, 0x01 }, 188 { IPSO_CLASS_TOPS, 0x02 }, 189 { IPSO_CLASS_SECR, 0x04 }, 190 { IPSO_CLASS_RES3, 0x08 }, 191 { IPSO_CLASS_CONF, 0x10 }, 192 { IPSO_CLASS_UNCL, 0x20 }, 193 { IPSO_CLASS_RES2, 0x40 }, 194 { IPSO_CLASS_RES1, 0x80 } 195}; 196 197 198/* 199 * compact the IP header into a structure which contains just the info. 200 * which is useful for comparing IP headers with. 201 */ 202void fr_makefrip(hlen, ip, fin) 203int hlen; 204ip_t *ip; 205fr_info_t *fin; 206{ 207 u_short optmsk = 0, secmsk = 0, auth = 0; 208 int i, mv, ol, off, p, plen, v; 209 fr_ip_t *fi = &fin->fin_fi; 210 struct optlist *op; 211 u_char *s, opt; 212 tcphdr_t *tcp; 213 214 fin->fin_rev = 0; 215 fin->fin_fr = NULL; 216 fin->fin_tcpf = 0; 217 fin->fin_data[0] = 0; 218 fin->fin_data[1] = 0; 219 fin->fin_rule = -1; 220 fin->fin_group = -1; 221#ifdef _KERNEL 222 fin->fin_icode = ipl_unreach; 223#endif 224 v = fin->fin_v; 225 fi->fi_v = v; 226 fin->fin_hlen = hlen; 227 if (v == 4) { 228 fin->fin_id = ip->ip_id; 229 fi->fi_tos = ip->ip_tos; 230 off = (ip->ip_off & IP_OFFMASK) << 3; 231 tcp = (tcphdr_t *)((char *)ip + hlen); 232 (*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4)); 233 fi->fi_src.i6[1] = 0; 234 fi->fi_src.i6[2] = 0; 235 fi->fi_src.i6[3] = 0; 236 fi->fi_dst.i6[1] = 0; 237 fi->fi_dst.i6[2] = 0; 238 fi->fi_dst.i6[3] = 0; 239 fi->fi_saddr = ip->ip_src.s_addr; 240 fi->fi_daddr = ip->ip_dst.s_addr; 241 p = ip->ip_p; 242 fi->fi_fl = (hlen > sizeof(ip_t)) ? FI_OPTIONS : 0; 243 if (ip->ip_off & 0x3fff) 244 fi->fi_fl |= FI_FRAG; 245 plen = ip->ip_len; 246 fin->fin_dlen = plen - hlen; 247 } 248#ifdef USE_INET6 249 else if (v == 6) { 250 ip6_t *ip6 = (ip6_t *)ip; 251 252 off = 0; 253 p = ip6->ip6_nxt; 254 fi->fi_p = p; 255 fi->fi_ttl = ip6->ip6_hlim; 256 tcp = (tcphdr_t *)(ip6 + 1); 257 fi->fi_src.in6 = ip6->ip6_src; 258 fi->fi_dst.in6 = ip6->ip6_dst; 259 fin->fin_id = (u_short)(ip6->ip6_flow & 0xffff); 260 fi->fi_tos = 0; 261 fi->fi_fl = 0; 262 plen = ntohs(ip6->ip6_plen); 263 fin->fin_dlen = plen; 264 } 265#endif 266 else 267 return; 268 269 fin->fin_off = off; 270 fin->fin_plen = plen; 271 fin->fin_dp = (void *)tcp; 272 273 switch (p) 274 { 275 case IPPROTO_ICMP : 276 { 277 int minicmpsz = sizeof(struct icmp); 278 icmphdr_t *icmp; 279 280 if (fin->fin_dlen > 1) 281 fin->fin_data[0] = *(u_short *)tcp; 282 283 if ((!(plen >= hlen + minicmpsz) && !off) || 284 (off && off < sizeof(struct icmp))) { 285 fi->fi_fl |= FI_SHORT; 286 if (fin->fin_dlen < 2) 287 break; 288 } 289 290 icmp = (icmphdr_t *)tcp; 291 292 if (!off && (icmp->icmp_type == ICMP_ECHOREPLY || 293 icmp->icmp_type == ICMP_ECHO)) 294 minicmpsz = ICMP_MINLEN; 295 296 /* type(1) + code(1) + cksum(2) + id(2) seq(2) + 297 * 3*timestamp(3*4) */ 298 else if (!off && (icmp->icmp_type == ICMP_TSTAMP || 299 icmp->icmp_type == ICMP_TSTAMPREPLY)) 300 minicmpsz = 20; 301 302 /* type(1) + code(1) + cksum(2) + id(2) seq(2) + mask(4) */ 303 else if (!off && (icmp->icmp_type == ICMP_MASKREQ || 304 icmp->icmp_type == ICMP_MASKREPLY)) 305 minicmpsz = 12; 306 307 break; 308 } 309 case IPPROTO_TCP : 310 fi->fi_fl |= FI_TCPUDP; 311#ifdef USE_INET6 312 if (v == 6) { 313 if (plen < sizeof(struct tcphdr)) 314 fi->fi_fl |= FI_SHORT; 315 } else 316#endif 317 if (v == 4) { 318 if ((!IPMINLEN(ip, tcphdr) && !off) || 319 (off && off < sizeof(struct tcphdr))) 320 fi->fi_fl |= FI_SHORT; 321 } 322 if (!(fi->fi_fl & FI_SHORT) && !off) 323 fin->fin_tcpf = tcp->th_flags; 324 goto getports; 325 case IPPROTO_UDP : 326 fi->fi_fl |= FI_TCPUDP; 327#ifdef USE_INET6 328 if (v == 6) { 329 if (plen < sizeof(struct udphdr)) 330 fi->fi_fl |= FI_SHORT; 331 } else 332#endif 333 if (v == 4) { 334 if ((!IPMINLEN(ip, udphdr) && !off) || 335 (off && off < sizeof(struct udphdr))) 336 fi->fi_fl |= FI_SHORT; 337 } 338getports: 339 if (!off && (fin->fin_dlen > 3)) { 340 fin->fin_data[0] = ntohs(tcp->th_sport); 341 fin->fin_data[1] = ntohs(tcp->th_dport); 342 } 343 break; 344 default : 345 break; 346 } 347 348#ifdef USE_INET6 349 if (v == 6) { 350 fi->fi_optmsk = 0; 351 fi->fi_secmsk = 0; 352 fi->fi_auth = 0; 353 return; 354 } 355#endif 356 357 for (s = (u_char *)(ip + 1), hlen -= (int)sizeof(*ip); hlen > 0; ) { 358 opt = *s; 359 if (opt == '\0') 360 break; 361 else if (opt == IPOPT_NOP) 362 ol = 1; 363 else { 364 if (hlen < 2) 365 break; 366 ol = (int)*(s + 1); 367 if (ol < 2 || ol > hlen) 368 break; 369 } 370 for (i = 9, mv = 4; mv >= 0; ) { 371 op = ipopts + i; 372 if (opt == (u_char)op->ol_val) { 373 optmsk |= op->ol_bit; 374 if (opt == IPOPT_SECURITY) { 375 struct optlist *sp; 376 u_char sec; 377 int j, m; 378 379 sec = *(s + 2); /* classification */ 380 for (j = 3, m = 2; m >= 0; ) { 381 sp = secopt + j; 382 if (sec == sp->ol_val) { 383 secmsk |= sp->ol_bit; 384 auth = *(s + 3); 385 auth *= 256; 386 auth += *(s + 4); 387 break; 388 } 389 if (sec < sp->ol_val) 390 j -= m--; 391 else 392 j += m--; 393 } 394 } 395 break; 396 } 397 if (opt < op->ol_val) 398 i -= mv--; 399 else 400 i += mv--; 401 } 402 hlen -= ol; 403 s += ol; 404 } 405 if (auth && !(auth & 0x0100)) 406 auth &= 0xff00; 407 fi->fi_optmsk = optmsk; 408 fi->fi_secmsk = secmsk; 409 fi->fi_auth = auth; 410} 411 412 413/* 414 * check an IP packet for TCP/UDP characteristics such as ports and flags. 415 */ 416int fr_tcpudpchk(ft, fin) 417frtuc_t *ft; 418fr_info_t *fin; 419{ 420 register u_short po, tup; 421 register char i; 422 register int err = 1; 423 424 /* 425 * Both ports should *always* be in the first fragment. 426 * So far, I cannot find any cases where they can not be. 427 * 428 * compare destination ports 429 */ 430 if ((i = (int)ft->ftu_dcmp)) { 431 po = ft->ftu_dport; 432 tup = fin->fin_data[1]; 433 /* 434 * Do opposite test to that required and 435 * continue if that succeeds. 436 */ 437 if (!--i && tup != po) /* EQUAL */ 438 err = 0; 439 else if (!--i && tup == po) /* NOTEQUAL */ 440 err = 0; 441 else if (!--i && tup >= po) /* LESSTHAN */ 442 err = 0; 443 else if (!--i && tup <= po) /* GREATERTHAN */ 444 err = 0; 445 else if (!--i && tup > po) /* LT or EQ */ 446 err = 0; 447 else if (!--i && tup < po) /* GT or EQ */ 448 err = 0; 449 else if (!--i && /* Out of range */ 450 (tup >= po && tup <= ft->ftu_dtop)) 451 err = 0; 452 else if (!--i && /* In range */ 453 (tup <= po || tup >= ft->ftu_dtop)) 454 err = 0; 455 } 456 /* 457 * compare source ports 458 */ 459 if (err && (i = (int)ft->ftu_scmp)) { 460 po = ft->ftu_sport; 461 tup = fin->fin_data[0]; 462 if (!--i && tup != po) 463 err = 0; 464 else if (!--i && tup == po) 465 err = 0; 466 else if (!--i && tup >= po) 467 err = 0; 468 else if (!--i && tup <= po) 469 err = 0; 470 else if (!--i && tup > po) 471 err = 0; 472 else if (!--i && tup < po) 473 err = 0; 474 else if (!--i && /* Out of range */ 475 (tup >= po && tup <= ft->ftu_stop)) 476 err = 0; 477 else if (!--i && /* In range */ 478 (tup <= po || tup >= ft->ftu_stop)) 479 err = 0; 480 } 481 482 /* 483 * If we don't have all the TCP/UDP header, then how can we 484 * expect to do any sort of match on it ? If we were looking for 485 * TCP flags, then NO match. If not, then match (which should 486 * satisfy the "short" class too). 487 */ 488 if (err && (fin->fin_fi.fi_p == IPPROTO_TCP)) { 489 if (fin->fin_fi.fi_fl & FI_SHORT) 490 return !(ft->ftu_tcpf | ft->ftu_tcpfm); 491 /* 492 * Match the flags ? If not, abort this match. 493 */ 494 if (ft->ftu_tcpfm && 495 ft->ftu_tcpf != (fin->fin_tcpf & ft->ftu_tcpfm)) { 496 FR_DEBUG(("f. %#x & %#x != %#x\n", fin->fin_tcpf, 497 ft->ftu_tcpfm, ft->ftu_tcpf)); 498 err = 0; 499 } 500 } 501 return err; 502} 503 504/* 505 * Check the input/output list of rules for a match and result. 506 * Could be per interface, but this gets real nasty when you don't have 507 * kernel sauce. 508 */ 509int fr_scanlist(pass, ip, fin, m) 510u_32_t pass; 511ip_t *ip; 512register fr_info_t *fin; 513void *m; 514{ 515 register struct frentry *fr; 516 register fr_ip_t *fi = &fin->fin_fi; 517 int rulen, portcmp = 0, off, skip = 0, logged = 0; 518 u_32_t passt; 519 520 fr = fin->fin_fr; 521 fin->fin_fr = NULL; 522 fin->fin_rule = 0; 523 fin->fin_group = 0; 524 if (fin->fin_v == 4) 525 off = ip->ip_off & IP_OFFMASK; 526 else 527 off = 0; 528 pass |= (fi->fi_fl << 24); 529 530 if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off) 531 portcmp = 1; 532 533 for (rulen = 0; fr; fr = fr->fr_next, rulen++) { 534 if (skip) { 535 skip--; 536 continue; 537 } 538 /* 539 * In all checks below, a null (zero) value in the 540 * filter struture is taken to mean a wildcard. 541 * 542 * check that we are working for the right interface 543 */ 544#ifdef _KERNEL 545# if BSD >= 199306 546 if (fin->fin_out != 0) { 547 if ((fr->fr_oifa && 548 fr->fr_oifa != ((mb_t *)m)->m_pkthdr.rcvif) || 549 (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)) 550 continue; 551 } else 552# endif 553 if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp) 554 continue; 555#else 556 if (opts & (OPT_VERBOSE|OPT_DEBUG)) 557 printf("\n"); 558 FR_VERBOSE(("%c", (pass & FR_PASS) ? 'p' : 559 (pass & FR_AUTH) ? 'a' : 'b')); 560 if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp) 561 continue; 562 FR_VERBOSE((":i")); 563#endif 564 { 565 register u_32_t *ld, *lm, *lip; 566 register int i; 567 568 lip = (u_32_t *)fi; 569 lm = (u_32_t *)&fr->fr_mip; 570 ld = (u_32_t *)&fr->fr_ip; 571 i = ((*lip & *lm) != *ld); 572 FR_DEBUG(("0. %#08x & %#08x != %#08x\n", 573 *lip, *lm, *ld)); 574 if (i) 575 continue; 576 /* 577 * We now know whether the packet version and the 578 * rule version match, along with protocol, ttl and 579 * tos. 580 */ 581 lip++, lm++, ld++; 582 /* 583 * Unrolled loops (4 each, for 32 bits). 584 */ 585 i |= ((*lip & *lm) != *ld) << 19; 586 FR_DEBUG(("1a. %#08x & %#08x != %#08x\n", 587 *lip, *lm, *ld)); 588 if (fi->fi_v == 6) { 589 lip++, lm++, ld++; 590 i |= ((*lip & *lm) != *ld) << 19; 591 FR_DEBUG(("1b. %#08x & %#08x != %#08x\n", 592 *lip, *lm, *ld)); 593 lip++, lm++, ld++; 594 i |= ((*lip & *lm) != *ld) << 19; 595 FR_DEBUG(("1c. %#08x & %#08x != %#08x\n", 596 *lip, *lm, *ld)); 597 lip++, lm++, ld++; 598 i |= ((*lip & *lm) != *ld) << 19; 599 FR_DEBUG(("1d. %#08x & %#08x != %#08x\n", 600 *lip, *lm, *ld)); 601 } else { 602 lip += 3; 603 lm += 3; 604 ld += 3; 605 } 606 i ^= (fr->fr_flags & FR_NOTSRCIP); 607 if (i) 608 continue; 609 lip++, lm++, ld++; 610 i |= ((*lip & *lm) != *ld) << 20; 611 FR_DEBUG(("2a. %#08x & %#08x != %#08x\n", 612 *lip, *lm, *ld)); 613 if (fi->fi_v == 6) { 614 lip++, lm++, ld++; 615 i |= ((*lip & *lm) != *ld) << 20; 616 FR_DEBUG(("2b. %#08x & %#08x != %#08x\n", 617 *lip, *lm, *ld)); 618 lip++, lm++, ld++; 619 i |= ((*lip & *lm) != *ld) << 20; 620 FR_DEBUG(("2c. %#08x & %#08x != %#08x\n", 621 *lip, *lm, *ld)); 622 lip++, lm++, ld++; 623 i |= ((*lip & *lm) != *ld) << 20; 624 FR_DEBUG(("2d. %#08x & %#08x != %#08x\n", 625 *lip, *lm, *ld)); 626 } else { 627 lip += 3; 628 lm += 3; 629 ld += 3; 630 } 631 i ^= (fr->fr_flags & FR_NOTDSTIP); 632 if (i) 633 continue; 634 lip++, lm++, ld++; 635 i |= ((*lip & *lm) != *ld); 636 FR_DEBUG(("3. %#08x & %#08x != %#08x\n", 637 *lip, *lm, *ld)); 638 lip++, lm++, ld++; 639 i |= ((*lip & *lm) != *ld); 640 FR_DEBUG(("4. %#08x & %#08x != %#08x\n", 641 *lip, *lm, *ld)); 642 if (i) 643 continue; 644 } 645 646 /* 647 * If a fragment, then only the first has what we're looking 648 * for here... 649 */ 650 if (!portcmp && (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf || 651 fr->fr_tcpfm)) 652 continue; 653 if (fi->fi_fl & FI_TCPUDP) { 654 if (!fr_tcpudpchk(&fr->fr_tuc, fin)) 655 continue; 656 } else if (fr->fr_icmpm || fr->fr_icmp) { 657 if ((fi->fi_p != IPPROTO_ICMP) || off || 658 (fin->fin_dlen < 2)) 659 continue; 660 if ((fin->fin_data[0] & fr->fr_icmpm) != fr->fr_icmp) { 661 FR_DEBUG(("i. %#x & %#x != %#x\n", 662 fin->fin_data[0], fr->fr_icmpm, 663 fr->fr_icmp)); 664 continue; 665 } 666 } 667 FR_VERBOSE(("*")); 668 /* 669 * Just log this packet... 670 */ 671 passt = fr->fr_flags; 672#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL)) 673 if (securelevel <= 0) 674#endif 675 if ((passt & FR_CALLNOW) && fr->fr_func) 676 passt = (*fr->fr_func)(passt, ip, fin); 677 fin->fin_fr = fr; 678#ifdef IPFILTER_LOG 679 if ((passt & FR_LOGMASK) == FR_LOG) { 680 if (!IPLLOG(passt, ip, fin, m)) { 681 if (passt & FR_LOGORBLOCK) 682 passt |= FR_BLOCK|FR_QUICK; 683 ATOMIC_INCL(frstats[fin->fin_out].fr_skip); 684 } 685 ATOMIC_INCL(frstats[fin->fin_out].fr_pkl); 686 logged = 1; 687 } 688#endif /* IPFILTER_LOG */ 689 if (!(skip = fr->fr_skip) && (passt & FR_LOGMASK) != FR_LOG) 690 pass = passt; 691 FR_DEBUG(("pass %#x\n", pass)); 692 ATOMIC_INCL(fr->fr_hits); 693 if (pass & FR_ACCOUNT) 694 fr->fr_bytes += (U_QUAD_T)ip->ip_len; 695 else 696 fin->fin_icode = fr->fr_icode; 697 fin->fin_rule = rulen; 698 fin->fin_group = fr->fr_group; 699 if (fr->fr_grp) { 700 fin->fin_fr = fr->fr_grp; 701 pass = fr_scanlist(pass, ip, fin, m); 702 if (fin->fin_fr == NULL) { 703 fin->fin_rule = rulen; 704 fin->fin_group = fr->fr_group; 705 fin->fin_fr = fr; 706 } 707 if (pass & FR_DONTCACHE) 708 logged = 1; 709 } 710 if (pass & FR_QUICK) 711 break; 712 } 713 if (logged) 714 pass |= FR_DONTCACHE; 715 return pass; 716} 717 718 719/* 720 * frcheck - filter check 721 * check using source and destination addresses/ports in a packet whether 722 * or not to pass it on or not. 723 */ 724int fr_check(ip, hlen, ifp, out 725#if defined(_KERNEL) && SOLARIS 726, qif, mp) 727qif_t *qif; 728#else 729, mp) 730#endif 731mb_t **mp; 732ip_t *ip; 733int hlen; 734void *ifp; 735int out; 736{ 737 /* 738 * The above really sucks, but short of writing a diff 739 */ 740 fr_info_t frinfo, *fc; 741 register fr_info_t *fin = &frinfo; 742 int changed, error = EHOSTUNREACH, v = ip->ip_v; 743 frentry_t *fr = NULL, *list; 744 u_32_t pass, apass; 745#if !SOLARIS || !defined(_KERNEL) 746 register mb_t *m = *mp; 747#endif 748 749#ifdef _KERNEL 750 mb_t *mc = NULL; 751 int p, len; 752# if !defined(__SVR4) && !defined(__svr4__) 753# ifdef __sgi 754 char hbuf[(0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8]; 755# endif 756 int up; 757 758# ifdef M_CANFASTFWD 759 /* 760 * XXX For now, IP Filter and fast-forwarding of cached flows 761 * XXX are mutually exclusive. Eventually, IP Filter should 762 * XXX get a "can-fast-forward" filter rule. 763 */ 764 m->m_flags &= ~M_CANFASTFWD; 765# endif /* M_CANFASTFWD */ 766# ifdef CSUM_DELAY_DATA 767 /* 768 * disable delayed checksums. 769 */ 770 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { 771 in_delayed_cksum(m); 772 m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA; 773 } 774# endif /* CSUM_DELAY_DATA */ 775 776# ifdef USE_INET6 777 if (v == 6) { 778 len = ntohs(((ip6_t*)ip)->ip6_plen); 779 p = ((ip6_t *)ip)->ip6_nxt; 780 } else 781# endif 782 { 783 p = ip->ip_p; 784 len = ip->ip_len; 785 } 786 787 if ((p == IPPROTO_TCP || p == IPPROTO_UDP || p == IPPROTO_ICMP 788# ifdef USE_INET6 789 || (v == 6 && p == IPPROTO_ICMPV6) 790# endif 791 )) { 792 int plen = 0; 793 794 if ((v == 6) || (ip->ip_off & IP_OFFMASK) == 0) 795 switch(p) 796 { 797 case IPPROTO_TCP: 798 plen = sizeof(tcphdr_t); 799 break; 800 case IPPROTO_UDP: 801 plen = sizeof(udphdr_t); 802 break; 803 /* 96 - enough for complete ICMP error IP header */ 804 case IPPROTO_ICMP: 805# ifdef USE_INET6 806 case IPPROTO_ICMPV6 : 807# endif 808 plen = ICMPERR_MAXPKTLEN - sizeof(ip_t); 809 break; 810 } 811 up = MIN(hlen + plen, len); 812 813 if (up > m->m_len) { 814# ifdef __sgi 815 /* Under IRIX, avoid m_pullup as it makes ping <hostname> panic */ 816 if ((up > sizeof(hbuf)) || (m_length(m) < up)) { 817 ATOMIC_INCL(frstats[out].fr_pull[1]); 818 return -1; 819 } 820 m_copydata(m, 0, up, hbuf); 821 ATOMIC_INCL(frstats[out].fr_pull[0]); 822 ip = (ip_t *)hbuf; 823# else /* __ sgi */ 824# ifndef linux 825 if ((*mp = m_pullup(m, up)) == 0) { 826 ATOMIC_INCL(frstats[out].fr_pull[1]); 827 return -1; 828 } else { 829 ATOMIC_INCL(frstats[out].fr_pull[0]); 830 m = *mp; 831 ip = mtod(m, ip_t *); 832 } 833# endif /* !linux */ 834# endif /* __sgi */ 835 } else 836 up = 0; 837 } else 838 up = 0; 839# endif /* !defined(__SVR4) && !defined(__svr4__) */ 840# if SOLARIS 841 mb_t *m = qif->qf_m; 842 843 if ((u_int)ip & 0x3) 844 return 2; 845 fin->fin_qfm = m; 846 fin->fin_qif = qif; 847# endif 848#endif /* _KERNEL */ 849 850#ifndef __FreeBSD__ 851 /* 852 * Be careful here: ip_id is in network byte order when called 853 * from ip_output() 854 */ 855 if ((out) && (v == 4)) 856 ip->ip_id = ntohs(ip->ip_id); 857#endif 858 859 changed = 0; 860 fin->fin_ifp = ifp; 861 fin->fin_v = v; 862 fin->fin_out = out; 863 fin->fin_mp = mp; 864 fr_makefrip(hlen, ip, fin); 865 866#ifdef _KERNEL 867# ifdef USE_INET6 868 if (v == 6) { 869 ATOMIC_INCL(frstats[0].fr_ipv6[out]); 870 } else 871# endif 872 if (!out && fr_chksrc && !fr_verifysrc(ip->ip_src, ifp)) { 873 ATOMIC_INCL(frstats[0].fr_badsrc); 874# ifdef IPFILTER_LOG 875 if (fr_chksrc == 2) { 876 fin->fin_group = -2; 877 pass = FR_INQUE|FR_NOMATCH|FR_LOGB; 878 (void) IPLLOG(pass, ip, fin, m); 879 } 880# endif 881# if !SOLARIS 882 m_freem(m); 883# endif 884 return error; 885 } 886#endif 887 pass = fr_pass; 888 if (fin->fin_fi.fi_fl & FI_SHORT) { 889 ATOMIC_INCL(frstats[out].fr_short); 890 } 891 892 READ_ENTER(&ipf_mutex); 893 894 if (fin->fin_fi.fi_fl & FI_SHORT) 895 ATOMIC_INCL(frstats[out].fr_short); 896 897 /* 898 * Check auth now. This, combined with the check below to see if apass 899 * is 0 is to ensure that we don't count the packet twice, which can 900 * otherwise occur when we reprocess it. As it is, we only count it 901 * after it has no auth. table matchup. This also stops NAT from 902 * occuring until after the packet has been auth'd. 903 */ 904 apass = fr_checkauth(ip, fin); 905 906 if (!out) { 907#ifdef USE_INET6 908 if (v == 6) 909 list = ipacct6[0][fr_active]; 910 else 911#endif 912 list = ipacct[0][fr_active]; 913 changed = ip_natin(ip, fin); 914 if (!apass && (fin->fin_fr = list) && 915 (fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) { 916 ATOMIC_INCL(frstats[0].fr_acct); 917 } 918 } 919 920 if (apass || (!(fr = ipfr_knownfrag(ip, fin)) && 921 !(fr = fr_checkstate(ip, fin)))) { 922 /* 923 * If a packet is found in the auth table, then skip checking 924 * the access lists for permission but we do need to consider 925 * the result as if it were from the ACL's. 926 */ 927 if (!apass) { 928 fc = frcache + out; 929 if (!bcmp((char *)fin, (char *)fc, FI_CSIZE)) { 930 /* 931 * copy cached data so we can unlock the mutex 932 * earlier. 933 */ 934 bcopy((char *)fc, (char *)fin, FI_COPYSIZE); 935 ATOMIC_INCL(frstats[out].fr_chit); 936 if ((fr = fin->fin_fr)) { 937 ATOMIC_INCL(fr->fr_hits); 938 pass = fr->fr_flags; 939 } 940 } else { 941#ifdef USE_INET6 942 if (v == 6) 943 list = ipfilter6[out][fr_active]; 944 else 945#endif 946 list = ipfilter[out][fr_active]; 947 if ((fin->fin_fr = list)) 948 pass = fr_scanlist(fr_pass, ip, fin, m); 949 if (!(pass & (FR_KEEPSTATE|FR_DONTCACHE))) 950 bcopy((char *)fin, (char *)fc, 951 FI_COPYSIZE); 952 if (pass & FR_NOMATCH) { 953 ATOMIC_INCL(frstats[out].fr_nom); 954 } 955 } 956 fr = fin->fin_fr; 957 } else 958 pass = apass; 959 960 /* 961 * If we fail to add a packet to the authorization queue, 962 * then we drop the packet later. However, if it was added 963 * then pretend we've dropped it already. 964 */ 965 if ((pass & FR_AUTH)) 966 if (fr_newauth((mb_t *)m, fin, ip) != 0) 967#ifdef _KERNEL 968 m = *mp = NULL; 969#else 970 ; 971#endif 972 973 if (pass & FR_PREAUTH) { 974 READ_ENTER(&ipf_auth); 975 if ((fin->fin_fr = ipauth) && 976 (pass = fr_scanlist(0, ip, fin, m))) { 977 ATOMIC_INCL(fr_authstats.fas_hits); 978 } else { 979 ATOMIC_INCL(fr_authstats.fas_miss); 980 } 981 RWLOCK_EXIT(&ipf_auth); 982 } 983 984 fin->fin_fr = fr; 985 if ((pass & (FR_KEEPFRAG|FR_KEEPSTATE)) == FR_KEEPFRAG) { 986 if (fin->fin_fi.fi_fl & FI_FRAG) { 987 if (ipfr_newfrag(ip, fin, pass) == -1) { 988 ATOMIC_INCL(frstats[out].fr_bnfr); 989 } else { 990 ATOMIC_INCL(frstats[out].fr_nfr); 991 } 992 } else { 993 ATOMIC_INCL(frstats[out].fr_cfr); 994 } 995 } 996 if (pass & FR_KEEPSTATE) { 997 if (fr_addstate(ip, fin, 0) == NULL) { 998 ATOMIC_INCL(frstats[out].fr_bads); 999 } else { 1000 ATOMIC_INCL(frstats[out].fr_ads); 1001 } 1002 } 1003 } else if (fr != NULL) { 1004 pass = fr->fr_flags; 1005 if (pass & FR_LOGFIRST) 1006 pass &= ~(FR_LOGFIRST|FR_LOG); 1007 } 1008 1009#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL)) 1010 if (securelevel <= 0) 1011#endif 1012 if (fr && fr->fr_func && !(pass & FR_CALLNOW)) 1013 pass = (*fr->fr_func)(pass, ip, fin); 1014 1015 /* 1016 * Only count/translate packets which will be passed on, out the 1017 * interface. 1018 */ 1019 if (out && (pass & FR_PASS)) { 1020#ifdef USE_INET6 1021 if (v == 6) 1022 list = ipacct6[1][fr_active]; 1023 else 1024#endif 1025 list = ipacct[1][fr_active]; 1026 if ((fin->fin_fr = list) && 1027 (fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) { 1028 ATOMIC_INCL(frstats[1].fr_acct); 1029 } 1030 fin->fin_fr = fr; 1031 changed = ip_natout(ip, fin); 1032 } else 1033 fin->fin_fr = fr; 1034 RWLOCK_EXIT(&ipf_mutex); 1035 1036#ifdef IPFILTER_LOG 1037 if ((fr_flags & FF_LOGGING) || (pass & FR_LOGMASK)) { 1038 if ((fr_flags & FF_LOGNOMATCH) && (pass & FR_NOMATCH)) { 1039 pass |= FF_LOGNOMATCH; 1040 ATOMIC_INCL(frstats[out].fr_npkl); 1041 goto logit; 1042 } else if (((pass & FR_LOGMASK) == FR_LOGP) || 1043 ((pass & FR_PASS) && (fr_flags & FF_LOGPASS))) { 1044 if ((pass & FR_LOGMASK) != FR_LOGP) 1045 pass |= FF_LOGPASS; 1046 ATOMIC_INCL(frstats[out].fr_ppkl); 1047 goto logit; 1048 } else if (((pass & FR_LOGMASK) == FR_LOGB) || 1049 ((pass & FR_BLOCK) && (fr_flags & FF_LOGBLOCK))) { 1050 if ((pass & FR_LOGMASK) != FR_LOGB) 1051 pass |= FF_LOGBLOCK; 1052 ATOMIC_INCL(frstats[out].fr_bpkl); 1053logit: 1054 if (!IPLLOG(pass, ip, fin, m)) { 1055 ATOMIC_INCL(frstats[out].fr_skip); 1056 if ((pass & (FR_PASS|FR_LOGORBLOCK)) == 1057 (FR_PASS|FR_LOGORBLOCK)) 1058 pass ^= FR_PASS|FR_BLOCK; 1059 } 1060 } 1061 } 1062#endif /* IPFILTER_LOG */ 1063 1064#ifndef __FreeBSD__ 1065 if ((out) && (v == 4)) 1066 ip->ip_id = htons(ip->ip_id); 1067#endif 1068 1069#ifdef _KERNEL 1070 /* 1071 * Only allow FR_DUP to work if a rule matched - it makes no sense to 1072 * set FR_DUP as a "default" as there are no instructions about where 1073 * to send the packet. 1074 */ 1075 if (fr && (pass & FR_DUP)) 1076# if SOLARIS 1077 mc = dupmsg(m); 1078# else 1079# ifndef linux 1080 mc = m_copy(m, 0, M_COPYALL); 1081# else 1082 ; 1083# endif 1084# endif 1085#endif 1086 if (pass & FR_PASS) { 1087 ATOMIC_INCL(frstats[out].fr_pass); 1088 } else if (pass & FR_BLOCK) { 1089 ATOMIC_INCL(frstats[out].fr_block); 1090 /* 1091 * Should we return an ICMP packet to indicate error 1092 * status passing through the packet filter ? 1093 * WARNING: ICMP error packets AND TCP RST packets should 1094 * ONLY be sent in repsonse to incoming packets. Sending them 1095 * in response to outbound packets can result in a panic on 1096 * some operating systems. 1097 */ 1098 if (!out) { 1099#ifdef _KERNEL 1100 if (pass & FR_RETICMP) { 1101 int dst; 1102 1103 if ((pass & FR_RETMASK) == FR_FAKEICMP) 1104 dst = 1; 1105 else 1106 dst = 0; 1107 send_icmp_err(ip, ICMP_UNREACH, fin, dst); 1108 ATOMIC_INCL(frstats[0].fr_ret); 1109 } else if (((pass & FR_RETMASK) == FR_RETRST) && 1110 !(fin->fin_fi.fi_fl & FI_SHORT)) { 1111 if (send_reset(ip, fin) == 0) { 1112 ATOMIC_INCL(frstats[1].fr_ret); 1113 } 1114 } 1115#else 1116 if ((pass & FR_RETMASK) == FR_RETICMP) { 1117 verbose("- ICMP unreachable sent\n"); 1118 ATOMIC_INCL(frstats[0].fr_ret); 1119 } else if ((pass & FR_RETMASK) == FR_FAKEICMP) { 1120 verbose("- forged ICMP unreachable sent\n"); 1121 ATOMIC_INCL(frstats[0].fr_ret); 1122 } else if (((pass & FR_RETMASK) == FR_RETRST) && 1123 !(fin->fin_fi.fi_fl & FI_SHORT)) { 1124 verbose("- TCP RST sent\n"); 1125 ATOMIC_INCL(frstats[1].fr_ret); 1126 } 1127#endif 1128 } else { 1129 if (pass & FR_RETRST) 1130 error = ECONNRESET; 1131 } 1132 } 1133 1134 /* 1135 * If we didn't drop off the bottom of the list of rules (and thus 1136 * the 'current' rule fr is not NULL), then we may have some extra 1137 * instructions about what to do with a packet. 1138 * Once we're finished return to our caller, freeing the packet if 1139 * we are dropping it (* BSD ONLY *). 1140 */ 1141 if ((changed == -1) && (pass & FR_PASS)) { 1142 pass &= ~FR_PASS; 1143 pass |= FR_BLOCK; 1144 } 1145#if defined(_KERNEL) 1146# if !SOLARIS 1147# if !defined(linux) 1148 if (fr) { 1149 frdest_t *fdp = &fr->fr_tif; 1150 1151 if (((pass & FR_FASTROUTE) && !out) || 1152 (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) { 1153 if (ipfr_fastroute(m, fin, fdp) == 0) 1154 m = *mp = NULL; 1155 } 1156 if (mc) 1157 ipfr_fastroute(mc, fin, &fr->fr_dif); 1158 } 1159 if (!(pass & FR_PASS) && m) 1160 m_freem(m); 1161# ifdef __sgi 1162 else if (changed && up && m) 1163 m_copyback(m, 0, up, hbuf); 1164# endif 1165# endif /* !linux */ 1166# else /* !SOLARIS */ 1167 if (fr) { 1168 frdest_t *fdp = &fr->fr_tif; 1169 1170 if (((pass & FR_FASTROUTE) && !out) || 1171 (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) { 1172 if (ipfr_fastroute(ip, m, mp, fin, fdp) == 0) 1173 m = *mp = NULL; 1174 } 1175 if (mc) 1176 ipfr_fastroute(ip, mc, mp, fin, &fr->fr_dif); 1177 } 1178# endif /* !SOLARIS */ 1179 return (pass & FR_PASS) ? 0 : error; 1180#else /* _KERNEL */ 1181 if (pass & FR_NOMATCH) 1182 return 1; 1183 if (pass & FR_PASS) 1184 return 0; 1185 if (pass & FR_AUTH) 1186 return -2; 1187 return -1; 1188#endif /* _KERNEL */ 1189} 1190 1191 1192/* 1193 * ipf_cksum 1194 * addr should be 16bit aligned and len is in bytes. 1195 * length is in bytes 1196 */ 1197u_short ipf_cksum(addr, len) 1198register u_short *addr; 1199register int len; 1200{ 1201 register u_32_t sum = 0; 1202 1203 for (sum = 0; len > 1; len -= 2) 1204 sum += *addr++; 1205 1206 /* mop up an odd byte, if necessary */ 1207 if (len == 1) 1208 sum += *(u_char *)addr; 1209 1210 /* 1211 * add back carry outs from top 16 bits to low 16 bits 1212 */ 1213 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1214 sum += (sum >> 16); /* add carry */ 1215 return (u_short)(~sum); 1216} 1217 1218 1219/* 1220 * NB: This function assumes we've pullup'd enough for all of the IP header 1221 * and the TCP header. We also assume that data blocks aren't allocated in 1222 * odd sizes. 1223 */ 1224u_short fr_tcpsum(m, ip, tcp) 1225mb_t *m; 1226ip_t *ip; 1227tcphdr_t *tcp; 1228{ 1229 u_short *sp, slen, ts; 1230 u_int sum, sum2; 1231 int hlen; 1232 1233 /* 1234 * Add up IP Header portion 1235 */ 1236 hlen = ip->ip_hl << 2; 1237 slen = ip->ip_len - hlen; 1238 sum = htons((u_short)ip->ip_p); 1239 sum += htons(slen); 1240 sp = (u_short *)&ip->ip_src; 1241 sum += *sp++; /* ip_src */ 1242 sum += *sp++; 1243 sum += *sp++; /* ip_dst */ 1244 sum += *sp++; 1245 ts = tcp->th_sum; 1246 tcp->th_sum = 0; 1247#ifdef KERNEL 1248# if SOLARIS 1249 sum2 = ip_cksum(m, hlen, sum); /* hlen == offset */ 1250 sum2 = (sum2 & 0xffff) + (sum2 >> 16); 1251 sum2 = ~sum2 & 0xffff; 1252# else /* SOLARIS */ 1253# if defined(BSD) || defined(sun) 1254# if BSD >= 199306 1255 m->m_data += hlen; 1256# else 1257 m->m_off += hlen; 1258# endif 1259 m->m_len -= hlen; 1260 sum2 = in_cksum(m, slen); 1261 m->m_len += hlen; 1262# if BSD >= 199306 1263 m->m_data -= hlen; 1264# else 1265 m->m_off -= hlen; 1266# endif 1267 /* 1268 * Both sum and sum2 are partial sums, so combine them together. 1269 */ 1270 sum = (sum & 0xffff) + (sum >> 16); 1271 sum = ~sum & 0xffff; 1272 sum2 += sum; 1273 sum2 = (sum2 & 0xffff) + (sum2 >> 16); 1274# else /* defined(BSD) || defined(sun) */ 1275{ 1276 union { 1277 u_char c[2]; 1278 u_short s; 1279 } bytes; 1280 u_short len = ip->ip_len; 1281# if defined(__sgi) 1282 int add; 1283# endif 1284 1285 /* 1286 * Add up IP Header portion 1287 */ 1288 sp = (u_short *)&ip->ip_src; 1289 len -= (ip->ip_hl << 2); 1290 sum = ntohs(IPPROTO_TCP); 1291 sum += htons(len); 1292 sum += *sp++; /* ip_src */ 1293 sum += *sp++; 1294 sum += *sp++; /* ip_dst */ 1295 sum += *sp++; 1296 if (sp != (u_short *)tcp) 1297 sp = (u_short *)tcp; 1298 sum += *sp++; /* sport */ 1299 sum += *sp++; /* dport */ 1300 sum += *sp++; /* seq */ 1301 sum += *sp++; 1302 sum += *sp++; /* ack */ 1303 sum += *sp++; 1304 sum += *sp++; /* off */ 1305 sum += *sp++; /* win */ 1306 sum += *sp++; /* Skip over checksum */ 1307 sum += *sp++; /* urp */ 1308 1309# ifdef __sgi 1310 /* 1311 * In case we had to copy the IP & TCP header out of mbufs, 1312 * skip over the mbuf bits which are the header 1313 */ 1314 if ((caddr_t)ip != mtod(m, caddr_t)) { 1315 hlen = (caddr_t)sp - (caddr_t)ip; 1316 while (hlen) { 1317 add = MIN(hlen, m->m_len); 1318 sp = (u_short *)(mtod(m, caddr_t) + add); 1319 hlen -= add; 1320 if (add == m->m_len) { 1321 m = m->m_next; 1322 if (!hlen) { 1323 if (!m) 1324 break; 1325 sp = mtod(m, u_short *); 1326 } 1327 PANIC((!m),("fr_tcpsum(1): not enough data")); 1328 } 1329 } 1330 } 1331# endif 1332 1333 if (!(len -= sizeof(*tcp))) 1334 goto nodata; 1335 while (len > 1) { 1336 if (((caddr_t)sp - mtod(m, caddr_t)) >= m->m_len) { 1337 m = m->m_next; 1338 PANIC((!m),("fr_tcpsum(2): not enough data")); 1339 sp = mtod(m, u_short *); 1340 } 1341 if (((caddr_t)(sp + 1) - mtod(m, caddr_t)) > m->m_len) { 1342 bytes.c[0] = *(u_char *)sp; 1343 m = m->m_next; 1344 PANIC((!m),("fr_tcpsum(3): not enough data")); 1345 sp = mtod(m, u_short *); 1346 bytes.c[1] = *(u_char *)sp; 1347 sum += bytes.s; 1348 sp = (u_short *)((u_char *)sp + 1); 1349 } 1350 if ((u_long)sp & 1) { 1351 bcopy((char *)sp++, (char *)&bytes.s, sizeof(bytes.s)); 1352 sum += bytes.s; 1353 } else 1354 sum += *sp++; 1355 len -= 2; 1356 } 1357 if (len) 1358 sum += ntohs(*(u_char *)sp << 8); 1359nodata: 1360 while (sum > 0xffff) 1361 sum = (sum & 0xffff) + (sum >> 16); 1362 sum2 = (u_short)(~sum & 0xffff); 1363} 1364# endif /* defined(BSD) || defined(sun) */ 1365# endif /* SOLARIS */ 1366#else /* KERNEL */ 1367 sum2 = 0; 1368#endif /* KERNEL */ 1369 tcp->th_sum = ts; 1370 return sum2; 1371} 1372 1373 1374#if defined(_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || defined(__sgi) ) 1375/* 1376 * Copyright (c) 1982, 1986, 1988, 1991, 1993 1377 * The Regents of the University of California. All rights reserved. 1378 * 1379 * Redistribution and use in source and binary forms, with or without 1380 * modification, are permitted provided that the following conditions 1381 * are met: 1382 * 1. Redistributions of source code must retain the above copyright 1383 * notice, this list of conditions and the following disclaimer. 1384 * 2. Redistributions in binary form must reproduce the above copyright 1385 * notice, this list of conditions and the following disclaimer in the 1386 * documentation and/or other materials provided with the distribution. 1387 * 3. All advertising materials mentioning features or use of this software 1388 * must display the following acknowledgement: 1389 * This product includes software developed by the University of 1390 * California, Berkeley and its contributors. 1391 * 4. Neither the name of the University nor the names of its contributors 1392 * may be used to endorse or promote products derived from this software 1393 * without specific prior written permission. 1394 * 1395 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1396 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1397 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1398 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 1399 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1400 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 1401 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 1402 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 1403 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 1404 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 1405 * SUCH DAMAGE. 1406 * 1407 * @(#)uipc_mbuf.c 8.2 (Berkeley) 1/4/94 1408 * $Id: fil.c,v 2.35.2.26 2000/10/24 11:58:17 darrenr Exp $ 1409 */ 1410/* 1411 * Copy data from an mbuf chain starting "off" bytes from the beginning, 1412 * continuing for "len" bytes, into the indicated buffer. 1413 */ 1414void 1415m_copydata(m, off, len, cp) 1416 register mb_t *m; 1417 register int off; 1418 register int len; 1419 caddr_t cp; 1420{ 1421 register unsigned count; 1422 1423 if (off < 0 || len < 0) 1424 panic("m_copydata"); 1425 while (off > 0) { 1426 if (m == 0) 1427 panic("m_copydata"); 1428 if (off < m->m_len) 1429 break; 1430 off -= m->m_len; 1431 m = m->m_next; 1432 } 1433 while (len > 0) { 1434 if (m == 0) 1435 panic("m_copydata"); 1436 count = MIN(m->m_len - off, len); 1437 bcopy(mtod(m, caddr_t) + off, cp, count); 1438 len -= count; 1439 cp += count; 1440 off = 0; 1441 m = m->m_next; 1442 } 1443} 1444 1445 1446# ifndef linux 1447/* 1448 * Copy data from a buffer back into the indicated mbuf chain, 1449 * starting "off" bytes from the beginning, extending the mbuf 1450 * chain if necessary. 1451 */ 1452void 1453m_copyback(m0, off, len, cp) 1454 struct mbuf *m0; 1455 register int off; 1456 register int len; 1457 caddr_t cp; 1458{ 1459 register int mlen; 1460 register struct mbuf *m = m0, *n; 1461 int totlen = 0; 1462 1463 if (m0 == 0) 1464 return; 1465 while (off > (mlen = m->m_len)) { 1466 off -= mlen; 1467 totlen += mlen; 1468 if (m->m_next == 0) { 1469 n = m_getclr(M_DONTWAIT, m->m_type); 1470 if (n == 0) 1471 goto out; 1472 n->m_len = min(MLEN, len + off); 1473 m->m_next = n; 1474 } 1475 m = m->m_next; 1476 } 1477 while (len > 0) { 1478 mlen = min (m->m_len - off, len); 1479 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 1480 cp += mlen; 1481 len -= mlen; 1482 mlen += off; 1483 off = 0; 1484 totlen += mlen; 1485 if (len == 0) 1486 break; 1487 if (m->m_next == 0) { 1488 n = m_get(M_DONTWAIT, m->m_type); 1489 if (n == 0) 1490 break; 1491 n->m_len = min(MLEN, len); 1492 m->m_next = n; 1493 } 1494 m = m->m_next; 1495 } 1496out: 1497#if 0 1498 if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 1499 m->m_pkthdr.len = totlen; 1500#endif 1501 return; 1502} 1503# endif /* linux */ 1504#endif /* (_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || __sgi) */ 1505 1506 1507frgroup_t *fr_findgroup(num, flags, which, set, fgpp) 1508u_32_t num, flags; 1509minor_t which; 1510int set; 1511frgroup_t ***fgpp; 1512{ 1513 frgroup_t *fg, **fgp; 1514 1515 if (which == IPL_LOGAUTH) 1516 fgp = &ipfgroups[2][set]; 1517 else if (flags & FR_ACCOUNT) 1518 fgp = &ipfgroups[1][set]; 1519 else if (flags & (FR_OUTQUE|FR_INQUE)) 1520 fgp = &ipfgroups[0][set]; 1521 else 1522 return NULL; 1523 num &= 0xffff; 1524 1525 while ((fg = *fgp)) 1526 if (fg->fg_num == num) 1527 break; 1528 else 1529 fgp = &fg->fg_next; 1530 if (fgpp) 1531 *fgpp = fgp; 1532 return fg; 1533} 1534 1535 1536frgroup_t *fr_addgroup(num, fp, which, set) 1537u_32_t num; 1538frentry_t *fp; 1539minor_t which; 1540int set; 1541{ 1542 frgroup_t *fg, **fgp; 1543 1544 if ((fg = fr_findgroup(num, fp->fr_flags, which, set, &fgp))) 1545 return fg; 1546 1547 KMALLOC(fg, frgroup_t *); 1548 if (fg) { 1549 fg->fg_num = num; 1550 fg->fg_next = *fgp; 1551 fg->fg_head = fp; 1552 fg->fg_start = &fp->fr_grp; 1553 *fgp = fg; 1554 } 1555 return fg; 1556} 1557 1558 1559void fr_delgroup(num, flags, which, set) 1560u_32_t num, flags; 1561minor_t which; 1562int set; 1563{ 1564 frgroup_t *fg, **fgp; 1565 1566 if (!(fg = fr_findgroup(num, flags, which, set, &fgp))) 1567 return; 1568 1569 *fgp = fg->fg_next; 1570 KFREE(fg); 1571} 1572 1573 1574 1575/* 1576 * recursively flush rules from the list, descending groups as they are 1577 * encountered. if a rule is the head of a group and it has lost all its 1578 * group members, then also delete the group reference. 1579 */ 1580static int frflushlist(set, unit, nfreedp, listp) 1581int set; 1582minor_t unit; 1583int *nfreedp; 1584frentry_t **listp; 1585{ 1586 register int freed = 0, i; 1587 register frentry_t *fp; 1588 1589 while ((fp = *listp)) { 1590 *listp = fp->fr_next; 1591 if (fp->fr_grp) { 1592 i = frflushlist(set, unit, nfreedp, &fp->fr_grp); 1593 MUTEX_ENTER(&ipf_rw); 1594 fp->fr_ref -= i; 1595 MUTEX_EXIT(&ipf_rw); 1596 } 1597 1598 ATOMIC_DEC32(fp->fr_ref); 1599 if (fp->fr_grhead) { 1600 fr_delgroup(fp->fr_grhead, fp->fr_flags, 1601 unit, set); 1602 fp->fr_grhead = 0; 1603 } 1604 if (fp->fr_ref == 0) { 1605 KFREE(fp); 1606 freed++; 1607 } else 1608 fp->fr_next = NULL; 1609 } 1610 *nfreedp += freed; 1611 return freed; 1612} 1613 1614 1615int frflush(unit, flags) 1616minor_t unit; 1617int flags; 1618{ 1619 int flushed = 0, set; 1620 1621 if (unit != IPL_LOGIPF) 1622 return 0; 1623 WRITE_ENTER(&ipf_mutex); 1624 bzero((char *)frcache, sizeof(frcache[0]) * 2); 1625 1626 set = fr_active; 1627 if (flags & FR_INACTIVE) 1628 set = 1 - set; 1629 1630 if (flags & FR_OUTQUE) { 1631#ifdef USE_INET6 1632 (void) frflushlist(set, unit, &flushed, &ipfilter6[1][set]); 1633 (void) frflushlist(set, unit, &flushed, &ipacct6[1][set]); 1634#endif 1635 (void) frflushlist(set, unit, &flushed, &ipfilter[1][set]); 1636 (void) frflushlist(set, unit, &flushed, &ipacct[1][set]); 1637 } 1638 if (flags & FR_INQUE) { 1639#ifdef USE_INET6 1640 (void) frflushlist(set, unit, &flushed, &ipfilter6[0][set]); 1641 (void) frflushlist(set, unit, &flushed, &ipacct6[0][set]); 1642#endif 1643 (void) frflushlist(set, unit, &flushed, &ipfilter[0][set]); 1644 (void) frflushlist(set, unit, &flushed, &ipacct[0][set]); 1645 } 1646 RWLOCK_EXIT(&ipf_mutex); 1647 return flushed; 1648} 1649 1650 1651char *memstr(src, dst, slen, dlen) 1652char *src, *dst; 1653int slen, dlen; 1654{ 1655 char *s = NULL; 1656 1657 while (dlen >= slen) { 1658 if (bcmp(src, dst, slen) == 0) { 1659 s = dst; 1660 break; 1661 } 1662 dst++; 1663 dlen--; 1664 } 1665 return s; 1666} 1667 1668 1669void fixskip(listp, rp, addremove) 1670frentry_t **listp, *rp; 1671int addremove; 1672{ 1673 frentry_t *fp; 1674 int rules = 0, rn = 0; 1675 1676 for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rules++) 1677 ; 1678 1679 if (!fp) 1680 return; 1681 1682 for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rn++) 1683 if (fp->fr_skip && (rn + fp->fr_skip >= rules)) 1684 fp->fr_skip += addremove; 1685} 1686 1687 1688#ifdef _KERNEL 1689/* 1690 * count consecutive 1's in bit mask. If the mask generated by counting 1691 * consecutive 1's is different to that passed, return -1, else return # 1692 * of bits. 1693 */ 1694int countbits(ip) 1695u_32_t ip; 1696{ 1697 u_32_t ipn; 1698 int cnt = 0, i, j; 1699 1700 ip = ipn = ntohl(ip); 1701 for (i = 32; i; i--, ipn *= 2) 1702 if (ipn & 0x80000000) 1703 cnt++; 1704 else 1705 break; 1706 ipn = 0; 1707 for (i = 32, j = cnt; i; i--, j--) { 1708 ipn *= 2; 1709 if (j > 0) 1710 ipn++; 1711 } 1712 if (ipn == ip) 1713 return cnt; 1714 return -1; 1715} 1716 1717 1718/* 1719 * return the first IP Address associated with an interface 1720 */ 1721int fr_ifpaddr(v, ifptr, inp) 1722int v; 1723void *ifptr; 1724struct in_addr *inp; 1725{ 1726# ifdef USE_INET6 1727 struct in6_addr *inp6 = NULL; 1728# endif 1729# if SOLARIS 1730 ill_t *ill = ifptr; 1731# else 1732 struct ifnet *ifp = ifptr; 1733# endif 1734 struct in_addr in; 1735 1736# if SOLARIS 1737# ifdef USE_INET6 1738 if (v == 6) { 1739 struct in6_addr in6; 1740 1741 /* 1742 * First is always link local. 1743 */ 1744 if (ill->ill_ipif->ipif_next) 1745 in6 = ill->ill_ipif->ipif_next->ipif_v6lcl_addr; 1746 else 1747 bzero((char *)&in6, sizeof(in6)); 1748 bcopy((char *)&in6, (char *)inp, sizeof(in6)); 1749 } else 1750# endif 1751 { 1752 in.s_addr = ill->ill_ipif->ipif_local_addr; 1753 *inp = in; 1754 } 1755# else /* SOLARIS */ 1756# if linux 1757 ; 1758# else /* linux */ 1759 struct sockaddr_in *sin; 1760 struct ifaddr *ifa; 1761 1762# if (__FreeBSD_version >= 300000) 1763 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1764# else 1765# if defined(__NetBSD__) || defined(__OpenBSD__) 1766 ifa = ifp->if_addrlist.tqh_first; 1767# else 1768# if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */ 1769 ifa = &((struct in_ifaddr *)ifp->in_ifaddr)->ia_ifa; 1770# else 1771 ifa = ifp->if_addrlist; 1772# endif 1773# endif /* __NetBSD__ || __OpenBSD__ */ 1774# endif /* __FreeBSD_version >= 300000 */ 1775# if (BSD < 199306) && !(/*IRIX6*/defined(__sgi) && defined(IFF_DRVRLOCK)) 1776 sin = (struct sockaddr_in *)&ifa->ifa_addr; 1777# else 1778 sin = (struct sockaddr_in *)ifa->ifa_addr; 1779 while (sin && ifa) { 1780 if ((v == 4) && (sin->sin_family == AF_INET)) 1781 break; 1782# ifdef USE_INET6 1783 if ((v == 6) && (sin->sin_family == AF_INET6)) { 1784 inp6 = &((struct sockaddr_in6 *)sin)->sin6_addr; 1785 if (!IN6_IS_ADDR_LINKLOCAL(inp6) && 1786 !IN6_IS_ADDR_LOOPBACK(inp6)) 1787 break; 1788 } 1789# endif 1790# if (__FreeBSD_version >= 300000) 1791 ifa = TAILQ_NEXT(ifa, ifa_link); 1792# else 1793# if defined(__NetBSD__) || defined(__OpenBSD__) 1794 ifa = ifa->ifa_list.tqe_next; 1795# else 1796 ifa = ifa->ifa_next; 1797# endif 1798# endif /* __FreeBSD_version >= 300000 */ 1799 if (ifa) 1800 sin = (struct sockaddr_in *)ifa->ifa_addr; 1801 } 1802 if (ifa == NULL) 1803 sin = NULL; 1804 if (sin == NULL) 1805 return -1; 1806# endif /* (BSD < 199306) && (!__sgi && IFF_DRVLOCK) */ 1807# ifdef USE_INET6 1808 if (v == 6) 1809 bcopy((char *)inp6, (char *)inp, sizeof(*inp6)); 1810 else 1811# endif 1812 { 1813 in = sin->sin_addr; 1814 *inp = in; 1815 } 1816# endif /* linux */ 1817# endif /* SOLARIS */ 1818 return 0; 1819} 1820 1821 1822static void frsynclist(fr) 1823register frentry_t *fr; 1824{ 1825 for (; fr; fr = fr->fr_next) { 1826 if (fr->fr_ifa != NULL) { 1827 fr->fr_ifa = GETUNIT(fr->fr_ifname, fr->fr_ip.fi_v); 1828 if (fr->fr_ifa == NULL) 1829 fr->fr_ifa = (void *)-1; 1830 } 1831 if (fr->fr_grp) 1832 frsynclist(fr->fr_grp); 1833 } 1834} 1835 1836 1837void frsync() 1838{ 1839# if !SOLARIS 1840 register struct ifnet *ifp; 1841 1842# if defined(__OpenBSD__) || ((NetBSD >= 199511) && (NetBSD < 1991011)) || \ 1843 (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)) 1844# if (NetBSD >= 199905) || defined(__OpenBSD__) 1845 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next) 1846# else 1847 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) 1848# endif 1849# else 1850 for (ifp = ifnet; ifp; ifp = ifp->if_next) 1851# endif 1852 { 1853 ip_natsync(ifp); 1854 ip_statesync(ifp); 1855 } 1856 ip_natsync((struct ifnet *)-1); 1857# endif 1858 1859 WRITE_ENTER(&ipf_mutex); 1860 frsynclist(ipacct[0][fr_active]); 1861 frsynclist(ipacct[1][fr_active]); 1862 frsynclist(ipfilter[0][fr_active]); 1863 frsynclist(ipfilter[1][fr_active]); 1864#ifdef USE_INET6 1865 frsynclist(ipacct6[0][fr_active]); 1866 frsynclist(ipacct6[1][fr_active]); 1867 frsynclist(ipfilter6[0][fr_active]); 1868 frsynclist(ipfilter6[1][fr_active]); 1869#endif 1870 RWLOCK_EXIT(&ipf_mutex); 1871} 1872 1873 1874/* 1875 * In the functions below, bcopy() is called because the pointer being 1876 * copied _from_ in this instance is a pointer to a char buf (which could 1877 * end up being unaligned) and on the kernel's local stack. 1878 */ 1879int ircopyptr(a, b, c) 1880void *a, *b; 1881size_t c; 1882{ 1883 caddr_t ca; 1884 int err; 1885 1886#if SOLARIS 1887 if (copyin(a, (char *)&ca, sizeof(ca))) 1888 return EFAULT; 1889#else 1890 bcopy(a, &ca, sizeof(ca)); 1891#endif 1892 err = copyin(ca, b, c); 1893 if (err) 1894 err = EFAULT; 1895 return err; 1896} 1897 1898 1899int iwcopyptr(a, b, c) 1900void *a, *b; 1901size_t c; 1902{ 1903 caddr_t ca; 1904 int err; 1905 1906#if SOLARIS 1907 if (copyin(b, (char *)&ca, sizeof(ca))) 1908 return EFAULT; 1909#else 1910 bcopy(b, &ca, sizeof(ca)); 1911#endif 1912 err = copyout(a, ca, c); 1913 if (err) 1914 err = EFAULT; 1915 return err; 1916} 1917 1918#else /* _KERNEL */ 1919 1920 1921/* 1922 * return the first IP Address associated with an interface 1923 */ 1924int fr_ifpaddr(v, ifptr, inp) 1925int v; 1926void *ifptr; 1927struct in_addr *inp; 1928{ 1929 return 0; 1930} 1931 1932 1933int ircopyptr(a, b, c) 1934void *a, *b; 1935size_t c; 1936{ 1937 caddr_t ca; 1938 1939 bcopy(a, &ca, sizeof(ca)); 1940 bcopy(ca, b, c); 1941 return 0; 1942} 1943 1944 1945int iwcopyptr(a, b, c) 1946void *a, *b; 1947size_t c; 1948{ 1949 caddr_t ca; 1950 1951 bcopy(b, &ca, sizeof(ca)); 1952 bcopy(a, ca, c); 1953 return 0; 1954} 1955 1956 1957#endif 1958 1959 1960int fr_lock(data, lockp) 1961caddr_t data; 1962int *lockp; 1963{ 1964 int arg, error; 1965 1966 error = IRCOPY(data, (caddr_t)&arg, sizeof(arg)); 1967 if (!error) { 1968 error = IWCOPY((caddr_t)lockp, data, sizeof(*lockp)); 1969 if (!error) 1970 *lockp = arg; 1971 } 1972 return error; 1973} 1974 1975 1976void fr_getstat(fiop) 1977friostat_t *fiop; 1978{ 1979 bcopy((char *)frstats, (char *)fiop->f_st, sizeof(filterstats_t) * 2); 1980 fiop->f_locks[0] = fr_state_lock; 1981 fiop->f_locks[1] = fr_nat_lock; 1982 fiop->f_locks[2] = fr_frag_lock; 1983 fiop->f_locks[3] = fr_auth_lock; 1984 fiop->f_fin[0] = ipfilter[0][0]; 1985 fiop->f_fin[1] = ipfilter[0][1]; 1986 fiop->f_fout[0] = ipfilter[1][0]; 1987 fiop->f_fout[1] = ipfilter[1][1]; 1988 fiop->f_acctin[0] = ipacct[0][0]; 1989 fiop->f_acctin[1] = ipacct[0][1]; 1990 fiop->f_acctout[0] = ipacct[1][0]; 1991 fiop->f_acctout[1] = ipacct[1][1]; 1992#ifdef USE_INET6 1993 fiop->f_fin6[0] = ipfilter6[0][0]; 1994 fiop->f_fin6[1] = ipfilter6[0][1]; 1995 fiop->f_fout6[0] = ipfilter6[1][0]; 1996 fiop->f_fout6[1] = ipfilter6[1][1]; 1997 fiop->f_acctin6[0] = ipacct6[0][0]; 1998 fiop->f_acctin6[1] = ipacct6[0][1]; 1999 fiop->f_acctout6[0] = ipacct6[1][0]; 2000 fiop->f_acctout6[1] = ipacct6[1][1]; 2001#else 2002 fiop->f_fin6[0] = NULL; 2003 fiop->f_fin6[1] = NULL; 2004 fiop->f_fout6[0] = NULL; 2005 fiop->f_fout6[1] = NULL; 2006 fiop->f_acctin6[0] = NULL; 2007 fiop->f_acctin6[1] = NULL; 2008 fiop->f_acctout6[0] = NULL; 2009 fiop->f_acctout6[1] = NULL; 2010#endif 2011 fiop->f_active = fr_active; 2012 fiop->f_froute[0] = ipl_frouteok[0]; 2013 fiop->f_froute[1] = ipl_frouteok[1]; 2014 2015 fiop->f_running = fr_running; 2016 fiop->f_groups[0][0] = ipfgroups[0][0]; 2017 fiop->f_groups[0][1] = ipfgroups[0][1]; 2018 fiop->f_groups[1][0] = ipfgroups[1][0]; 2019 fiop->f_groups[1][1] = ipfgroups[1][1]; 2020 fiop->f_groups[2][0] = ipfgroups[2][0]; 2021 fiop->f_groups[2][1] = ipfgroups[2][1]; 2022#ifdef IPFILTER_LOG 2023 fiop->f_logging = 1; 2024#else 2025 fiop->f_logging = 0; 2026#endif 2027 fiop->f_defpass = fr_pass; 2028 strncpy(fiop->f_version, ipfilter_version, sizeof(fiop->f_version)); 2029} 2030 2031 2032#ifdef USE_INET6 2033int icmptoicmp6types[ICMP_MAXTYPE+1] = { 2034 ICMP6_ECHO_REPLY, /* 0: ICMP_ECHOREPLY */ 2035 -1, /* 1: UNUSED */ 2036 -1, /* 2: UNUSED */ 2037 ICMP6_DST_UNREACH, /* 3: ICMP_UNREACH */ 2038 -1, /* 4: ICMP_SOURCEQUENCH */ 2039 ND_REDIRECT, /* 5: ICMP_REDIRECT */ 2040 -1, /* 6: UNUSED */ 2041 -1, /* 7: UNUSED */ 2042 ICMP6_ECHO_REQUEST, /* 8: ICMP_ECHO */ 2043 -1, /* 9: UNUSED */ 2044 -1, /* 10: UNUSED */ 2045 ICMP6_TIME_EXCEEDED, /* 11: ICMP_TIMXCEED */ 2046 ICMP6_PARAM_PROB, /* 12: ICMP_PARAMPROB */ 2047 -1, /* 13: ICMP_TSTAMP */ 2048 -1, /* 14: ICMP_TSTAMPREPLY */ 2049 -1, /* 15: ICMP_IREQ */ 2050 -1, /* 16: ICMP_IREQREPLY */ 2051 -1, /* 17: ICMP_MASKREQ */ 2052 -1, /* 18: ICMP_MASKREPLY */ 2053}; 2054 2055 2056int icmptoicmp6unreach[ICMP_MAX_UNREACH] = { 2057 ICMP6_DST_UNREACH_ADDR, /* 0: ICMP_UNREACH_NET */ 2058 ICMP6_DST_UNREACH_ADDR, /* 1: ICMP_UNREACH_HOST */ 2059 -1, /* 2: ICMP_UNREACH_PROTOCOL */ 2060 ICMP6_DST_UNREACH_NOPORT, /* 3: ICMP_UNREACH_PORT */ 2061 -1, /* 4: ICMP_UNREACH_NEEDFRAG */ 2062 ICMP6_DST_UNREACH_NOTNEIGHBOR, /* 5: ICMP_UNREACH_SRCFAIL */ 2063 ICMP6_DST_UNREACH_ADDR, /* 6: ICMP_UNREACH_NET_UNKNOWN */ 2064 ICMP6_DST_UNREACH_ADDR, /* 7: ICMP_UNREACH_HOST_UNKNOWN */ 2065 -1, /* 8: ICMP_UNREACH_ISOLATED */ 2066 ICMP6_DST_UNREACH_ADMIN, /* 9: ICMP_UNREACH_NET_PROHIB */ 2067 ICMP6_DST_UNREACH_ADMIN, /* 10: ICMP_UNREACH_HOST_PROHIB */ 2068 -1, /* 11: ICMP_UNREACH_TOSNET */ 2069 -1, /* 12: ICMP_UNREACH_TOSHOST */ 2070 ICMP6_DST_UNREACH_ADMIN, /* 13: ICMP_UNREACH_ADMIN_PROHIBIT */ 2071}; 2072#endif 2073