1 /* $OpenBSD: pf_osfp.c,v 1.28 2013/11/11 09:15:34 mpi Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Mike Frantzen <frantzen@w4g.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 */ 19 20 #include <sys/param.h> 21 #include <sys/socket.h> 22 #ifdef _KERNEL 23 # include <sys/systm.h> 24 #include <sys/pool.h> 25 #endif /* _KERNEL */ 26 #include <sys/mbuf.h> 27 #include <sys/syslog.h> 28 29 #include <netinet/in.h> 30 #include <netinet/in_systm.h> 31 #include <netinet/ip.h> 32 #include <netinet/tcp.h> 33 34 #include <net/if.h> 35 #include <net/pfvar.h> 36 37 #include <netinet/ip6.h> 38 39 40 #ifdef _KERNEL 41 typedef struct pool pool_t; 42 43 #else 44 /* Userland equivalents so we can lend code to tcpdump et al. */ 45 46 # include <arpa/inet.h> 47 # include <errno.h> 48 # include <stdio.h> 49 # include <stdlib.h> 50 # include <string.h> 51 # include <netdb.h> 52 # define pool_t int 53 # define pool_get(pool, flags) malloc(*(pool)) 54 # define pool_put(pool, item) free(item) 55 # define pool_init(pool, size, a, ao, f, m, p) (*(pool)) = (size) 56 57 # ifdef PFDEBUG 58 # include <sys/stdarg.h> /* for DPFPRINTF() */ 59 # endif /* PFDEBUG */ 60 61 #endif /* _KERNEL */ 62 63 64 SLIST_HEAD(pf_osfp_list, pf_os_fingerprint) pf_osfp_list; 65 pool_t pf_osfp_entry_pl; 66 pool_t pf_osfp_pl; 67 68 struct pf_os_fingerprint *pf_osfp_find(struct pf_osfp_list *, 69 struct pf_os_fingerprint *, u_int8_t); 70 struct pf_os_fingerprint *pf_osfp_find_exact(struct pf_osfp_list *, 71 struct pf_os_fingerprint *); 72 void pf_osfp_insert(struct pf_osfp_list *, 73 struct pf_os_fingerprint *); 74 75 76 #ifdef _KERNEL 77 /* 78 * Passively fingerprint the OS of the host (IPv4 TCP SYN packets only) 79 * Returns the list of possible OSes. 80 */ 81 struct pf_osfp_enlist * 82 pf_osfp_fingerprint(struct pf_pdesc *pd) 83 { 84 struct tcphdr *th = pd->hdr.tcp; 85 struct ip *ip = NULL; 86 struct ip6_hdr *ip6 = NULL; 87 char hdr[60]; 88 89 if (pd->proto != IPPROTO_TCP) 90 return (NULL); 91 92 switch (pd->af) { 93 case AF_INET: 94 ip = mtod(pd->m, struct ip *); 95 break; 96 case AF_INET6: 97 ip6 = mtod(pd->m, struct ip6_hdr *); 98 break; 99 } 100 if (!pf_pull_hdr(pd->m, pd->off, hdr, th->th_off << 2, NULL, NULL, 101 pd->af)) 102 return (NULL); 103 104 return (pf_osfp_fingerprint_hdr(ip, ip6, (struct tcphdr *)hdr)); 105 } 106 #endif /* _KERNEL */ 107 108 struct pf_osfp_enlist * 109 pf_osfp_fingerprint_hdr(const struct ip *ip, const struct ip6_hdr *ip6, 110 const struct tcphdr *tcp) 111 { 112 struct pf_os_fingerprint fp, *fpresult; 113 int cnt, optlen = 0; 114 const u_int8_t *optp; 115 #ifdef _KERNEL 116 char srcname[128]; 117 #else 118 char srcname[NI_MAXHOST]; 119 #endif 120 121 if ((tcp->th_flags & (TH_SYN|TH_ACK)) != TH_SYN) 122 return (NULL); 123 if (ip) { 124 if ((ip->ip_off & htons(IP_OFFMASK)) != 0) 125 return (NULL); 126 } 127 128 memset(&fp, 0, sizeof(fp)); 129 130 if (ip) { 131 #ifndef _KERNEL 132 struct sockaddr_in sin; 133 #endif 134 135 fp.fp_psize = ntohs(ip->ip_len); 136 fp.fp_ttl = ip->ip_ttl; 137 if (ip->ip_off & htons(IP_DF)) 138 fp.fp_flags |= PF_OSFP_DF; 139 #ifdef _KERNEL 140 inet_ntop(AF_INET, &ip->ip_src, srcname, sizeof(srcname)); 141 #else 142 memset(&sin, 0, sizeof(sin)); 143 sin.sin_family = AF_INET; 144 sin.sin_len = sizeof(struct sockaddr_in); 145 sin.sin_addr = ip->ip_src; 146 (void)getnameinfo((struct sockaddr *)&sin, 147 sizeof(struct sockaddr_in), srcname, sizeof(srcname), 148 NULL, 0, NI_NUMERICHOST); 149 #endif 150 } 151 #ifdef INET6 152 else if (ip6) { 153 #ifndef _KERNEL 154 struct sockaddr_in6 sin6; 155 #endif 156 157 /* jumbo payload? */ 158 fp.fp_psize = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 159 fp.fp_ttl = ip6->ip6_hlim; 160 fp.fp_flags |= PF_OSFP_DF; 161 fp.fp_flags |= PF_OSFP_INET6; 162 #ifdef _KERNEL 163 inet_ntop(AF_INET6, &ip6->ip6_src, srcname, sizeof(srcname)); 164 #else 165 memset(&sin6, 0, sizeof(sin6)); 166 sin6.sin6_family = AF_INET6; 167 sin6.sin6_len = sizeof(struct sockaddr_in6); 168 sin6.sin6_addr = ip6->ip6_src; 169 (void)getnameinfo((struct sockaddr *)&sin6, 170 sizeof(struct sockaddr_in6), srcname, sizeof(srcname), 171 NULL, 0, NI_NUMERICHOST); 172 #endif 173 } 174 #endif 175 else 176 return (NULL); 177 fp.fp_wsize = ntohs(tcp->th_win); 178 179 180 cnt = (tcp->th_off << 2) - sizeof(*tcp); 181 optp = (const u_int8_t *)((const char *)tcp + sizeof(*tcp)); 182 for (; cnt > 0; cnt -= optlen, optp += optlen) { 183 if (*optp == TCPOPT_EOL) 184 break; 185 186 fp.fp_optcnt++; 187 if (*optp == TCPOPT_NOP) { 188 fp.fp_tcpopts = (fp.fp_tcpopts << PF_OSFP_TCPOPT_BITS) | 189 PF_OSFP_TCPOPT_NOP; 190 optlen = 1; 191 } else { 192 if (cnt < 2) 193 return (NULL); 194 optlen = optp[1]; 195 if (optlen > cnt || optlen < 2) 196 return (NULL); 197 switch (*optp) { 198 case TCPOPT_MAXSEG: 199 if (optlen >= TCPOLEN_MAXSEG) 200 memcpy(&fp.fp_mss, &optp[2], 201 sizeof(fp.fp_mss)); 202 fp.fp_tcpopts = (fp.fp_tcpopts << 203 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_MSS; 204 NTOHS(fp.fp_mss); 205 break; 206 case TCPOPT_WINDOW: 207 if (optlen >= TCPOLEN_WINDOW) 208 memcpy(&fp.fp_wscale, &optp[2], 209 sizeof(fp.fp_wscale)); 210 fp.fp_tcpopts = (fp.fp_tcpopts << 211 PF_OSFP_TCPOPT_BITS) | 212 PF_OSFP_TCPOPT_WSCALE; 213 break; 214 case TCPOPT_SACK_PERMITTED: 215 fp.fp_tcpopts = (fp.fp_tcpopts << 216 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_SACK; 217 break; 218 case TCPOPT_TIMESTAMP: 219 if (optlen >= TCPOLEN_TIMESTAMP) { 220 u_int32_t ts; 221 memcpy(&ts, &optp[2], sizeof(ts)); 222 if (ts == 0) 223 fp.fp_flags |= PF_OSFP_TS0; 224 225 } 226 fp.fp_tcpopts = (fp.fp_tcpopts << 227 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_TS; 228 break; 229 default: 230 return (NULL); 231 } 232 } 233 optlen = MAX(optlen, 1); /* paranoia */ 234 } 235 236 DPFPRINTF(LOG_NOTICE, 237 "fingerprinted %s:%d %d:%d:%d:%d:%llx (%d) " 238 "(TS=%s,M=%s%d,W=%s%d)", 239 srcname, ntohs(tcp->th_sport), 240 fp.fp_wsize, fp.fp_ttl, (fp.fp_flags & PF_OSFP_DF) != 0, 241 fp.fp_psize, (long long int)fp.fp_tcpopts, fp.fp_optcnt, 242 (fp.fp_flags & PF_OSFP_TS0) ? "0" : "", 243 (fp.fp_flags & PF_OSFP_MSS_MOD) ? "%" : 244 (fp.fp_flags & PF_OSFP_MSS_DC) ? "*" : "", 245 fp.fp_mss, 246 (fp.fp_flags & PF_OSFP_WSCALE_MOD) ? "%" : 247 (fp.fp_flags & PF_OSFP_WSCALE_DC) ? "*" : "", 248 fp.fp_wscale); 249 250 if ((fpresult = pf_osfp_find(&pf_osfp_list, &fp, 251 PF_OSFP_MAXTTL_OFFSET))) 252 return (&fpresult->fp_oses); 253 return (NULL); 254 } 255 256 /* Match a fingerprint ID against a list of OSes */ 257 int 258 pf_osfp_match(struct pf_osfp_enlist *list, pf_osfp_t os) 259 { 260 struct pf_osfp_entry *entry; 261 int os_class, os_version, os_subtype; 262 int en_class, en_version, en_subtype; 263 264 if (os == PF_OSFP_ANY) 265 return (1); 266 if (list == NULL) { 267 DPFPRINTF(LOG_NOTICE, "osfp no match against %x", os); 268 return (os == PF_OSFP_UNKNOWN); 269 } 270 PF_OSFP_UNPACK(os, os_class, os_version, os_subtype); 271 SLIST_FOREACH(entry, list, fp_entry) { 272 PF_OSFP_UNPACK(entry->fp_os, en_class, en_version, en_subtype); 273 if ((os_class == PF_OSFP_ANY || en_class == os_class) && 274 (os_version == PF_OSFP_ANY || en_version == os_version) && 275 (os_subtype == PF_OSFP_ANY || en_subtype == os_subtype)) { 276 DPFPRINTF(LOG_NOTICE, 277 "osfp matched %s %s %s %x==%x", 278 entry->fp_class_nm, entry->fp_version_nm, 279 entry->fp_subtype_nm, os, entry->fp_os); 280 return (1); 281 } 282 } 283 DPFPRINTF(LOG_NOTICE, "fingerprint 0x%x didn't match", os); 284 return (0); 285 } 286 287 /* Initialize the OS fingerprint system */ 288 void 289 pf_osfp_initialize(void) 290 { 291 pool_init(&pf_osfp_entry_pl, sizeof(struct pf_osfp_entry), 0, 0, 0, 292 "pfosfpen", &pool_allocator_nointr); 293 pool_init(&pf_osfp_pl, sizeof(struct pf_os_fingerprint), 0, 0, 0, 294 "pfosfp", &pool_allocator_nointr); 295 SLIST_INIT(&pf_osfp_list); 296 } 297 298 /* Flush the fingerprint list */ 299 void 300 pf_osfp_flush(void) 301 { 302 struct pf_os_fingerprint *fp; 303 struct pf_osfp_entry *entry; 304 305 while ((fp = SLIST_FIRST(&pf_osfp_list))) { 306 SLIST_REMOVE_HEAD(&pf_osfp_list, fp_next); 307 while ((entry = SLIST_FIRST(&fp->fp_oses))) { 308 SLIST_REMOVE_HEAD(&fp->fp_oses, fp_entry); 309 pool_put(&pf_osfp_entry_pl, entry); 310 } 311 pool_put(&pf_osfp_pl, fp); 312 } 313 } 314 315 316 /* Add a fingerprint */ 317 int 318 pf_osfp_add(struct pf_osfp_ioctl *fpioc) 319 { 320 struct pf_os_fingerprint *fp, fpadd; 321 struct pf_osfp_entry *entry; 322 323 memset(&fpadd, 0, sizeof(fpadd)); 324 fpadd.fp_tcpopts = fpioc->fp_tcpopts; 325 fpadd.fp_wsize = fpioc->fp_wsize; 326 fpadd.fp_psize = fpioc->fp_psize; 327 fpadd.fp_mss = fpioc->fp_mss; 328 fpadd.fp_flags = fpioc->fp_flags; 329 fpadd.fp_optcnt = fpioc->fp_optcnt; 330 fpadd.fp_wscale = fpioc->fp_wscale; 331 fpadd.fp_ttl = fpioc->fp_ttl; 332 333 DPFPRINTF(LOG_DEBUG, 334 "adding osfp %s %s %s = %s%d:%d:%d:%s%d:0x%llx %d " 335 "(TS=%s,M=%s%d,W=%s%d) %x", 336 fpioc->fp_os.fp_class_nm, fpioc->fp_os.fp_version_nm, 337 fpioc->fp_os.fp_subtype_nm, 338 (fpadd.fp_flags & PF_OSFP_WSIZE_MOD) ? "%" : 339 (fpadd.fp_flags & PF_OSFP_WSIZE_MSS) ? "S" : 340 (fpadd.fp_flags & PF_OSFP_WSIZE_MTU) ? "T" : 341 (fpadd.fp_flags & PF_OSFP_WSIZE_DC) ? "*" : "", 342 fpadd.fp_wsize, 343 fpadd.fp_ttl, 344 (fpadd.fp_flags & PF_OSFP_DF) ? 1 : 0, 345 (fpadd.fp_flags & PF_OSFP_PSIZE_MOD) ? "%" : 346 (fpadd.fp_flags & PF_OSFP_PSIZE_DC) ? "*" : "", 347 fpadd.fp_psize, 348 (long long int)fpadd.fp_tcpopts, fpadd.fp_optcnt, 349 (fpadd.fp_flags & PF_OSFP_TS0) ? "0" : "", 350 (fpadd.fp_flags & PF_OSFP_MSS_MOD) ? "%" : 351 (fpadd.fp_flags & PF_OSFP_MSS_DC) ? "*" : "", 352 fpadd.fp_mss, 353 (fpadd.fp_flags & PF_OSFP_WSCALE_MOD) ? "%" : 354 (fpadd.fp_flags & PF_OSFP_WSCALE_DC) ? "*" : "", 355 fpadd.fp_wscale, 356 fpioc->fp_os.fp_os); 357 358 if ((fp = pf_osfp_find_exact(&pf_osfp_list, &fpadd))) { 359 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 360 if (PF_OSFP_ENTRY_EQ(entry, &fpioc->fp_os)) 361 return (EEXIST); 362 } 363 if ((entry = pool_get(&pf_osfp_entry_pl, 364 PR_WAITOK|PR_LIMITFAIL)) == NULL) 365 return (ENOMEM); 366 } else { 367 if ((fp = pool_get(&pf_osfp_pl, 368 PR_WAITOK|PR_ZERO|PR_LIMITFAIL)) == NULL) 369 return (ENOMEM); 370 fp->fp_tcpopts = fpioc->fp_tcpopts; 371 fp->fp_wsize = fpioc->fp_wsize; 372 fp->fp_psize = fpioc->fp_psize; 373 fp->fp_mss = fpioc->fp_mss; 374 fp->fp_flags = fpioc->fp_flags; 375 fp->fp_optcnt = fpioc->fp_optcnt; 376 fp->fp_wscale = fpioc->fp_wscale; 377 fp->fp_ttl = fpioc->fp_ttl; 378 SLIST_INIT(&fp->fp_oses); 379 if ((entry = pool_get(&pf_osfp_entry_pl, 380 PR_WAITOK|PR_LIMITFAIL)) == NULL) { 381 pool_put(&pf_osfp_pl, fp); 382 return (ENOMEM); 383 } 384 pf_osfp_insert(&pf_osfp_list, fp); 385 } 386 memcpy(entry, &fpioc->fp_os, sizeof(*entry)); 387 388 /* Make sure the strings are NUL terminated */ 389 entry->fp_class_nm[sizeof(entry->fp_class_nm)-1] = '\0'; 390 entry->fp_version_nm[sizeof(entry->fp_version_nm)-1] = '\0'; 391 entry->fp_subtype_nm[sizeof(entry->fp_subtype_nm)-1] = '\0'; 392 393 SLIST_INSERT_HEAD(&fp->fp_oses, entry, fp_entry); 394 395 #ifdef PFDEBUG 396 if ((fp = pf_osfp_validate())) 397 DPFPRINTF(LOG_NOTICE, 398 "Invalid fingerprint list"); 399 #endif /* PFDEBUG */ 400 return (0); 401 } 402 403 404 /* Find a fingerprint in the list */ 405 struct pf_os_fingerprint * 406 pf_osfp_find(struct pf_osfp_list *list, struct pf_os_fingerprint *find, 407 u_int8_t ttldiff) 408 { 409 struct pf_os_fingerprint *f; 410 411 #define MATCH_INT(_MOD, _DC, _field) \ 412 if ((f->fp_flags & _DC) == 0) { \ 413 if ((f->fp_flags & _MOD) == 0) { \ 414 if (f->_field != find->_field) \ 415 continue; \ 416 } else { \ 417 if (f->_field == 0 || find->_field % f->_field) \ 418 continue; \ 419 } \ 420 } 421 422 SLIST_FOREACH(f, list, fp_next) { 423 if (f->fp_tcpopts != find->fp_tcpopts || 424 f->fp_optcnt != find->fp_optcnt || 425 f->fp_ttl < find->fp_ttl || 426 f->fp_ttl - find->fp_ttl > ttldiff || 427 (f->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0)) != 428 (find->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0))) 429 continue; 430 431 MATCH_INT(PF_OSFP_PSIZE_MOD, PF_OSFP_PSIZE_DC, fp_psize) 432 MATCH_INT(PF_OSFP_MSS_MOD, PF_OSFP_MSS_DC, fp_mss) 433 MATCH_INT(PF_OSFP_WSCALE_MOD, PF_OSFP_WSCALE_DC, fp_wscale) 434 if ((f->fp_flags & PF_OSFP_WSIZE_DC) == 0) { 435 if (f->fp_flags & PF_OSFP_WSIZE_MSS) { 436 if (find->fp_mss == 0) 437 continue; 438 439 /* Some "smart" NAT devices and DSL routers will tweak the MSS size and 440 * will set it to whatever is suitable for the link type. 441 */ 442 #define SMART_MSS 1460 443 if ((find->fp_wsize % find->fp_mss || 444 find->fp_wsize / find->fp_mss != 445 f->fp_wsize) && 446 (find->fp_wsize % SMART_MSS || 447 find->fp_wsize / SMART_MSS != 448 f->fp_wsize)) 449 continue; 450 } else if (f->fp_flags & PF_OSFP_WSIZE_MTU) { 451 if (find->fp_mss == 0) 452 continue; 453 454 #define MTUOFF (sizeof(struct ip) + sizeof(struct tcphdr)) 455 #define SMART_MTU (SMART_MSS + MTUOFF) 456 if ((find->fp_wsize % (find->fp_mss + MTUOFF) || 457 find->fp_wsize / (find->fp_mss + MTUOFF) != 458 f->fp_wsize) && 459 (find->fp_wsize % SMART_MTU || 460 find->fp_wsize / SMART_MTU != 461 f->fp_wsize)) 462 continue; 463 } else if (f->fp_flags & PF_OSFP_WSIZE_MOD) { 464 if (f->fp_wsize == 0 || find->fp_wsize % 465 f->fp_wsize) 466 continue; 467 } else { 468 if (f->fp_wsize != find->fp_wsize) 469 continue; 470 } 471 } 472 return (f); 473 } 474 475 return (NULL); 476 } 477 478 /* Find an exact fingerprint in the list */ 479 struct pf_os_fingerprint * 480 pf_osfp_find_exact(struct pf_osfp_list *list, struct pf_os_fingerprint *find) 481 { 482 struct pf_os_fingerprint *f; 483 484 SLIST_FOREACH(f, list, fp_next) { 485 if (f->fp_tcpopts == find->fp_tcpopts && 486 f->fp_wsize == find->fp_wsize && 487 f->fp_psize == find->fp_psize && 488 f->fp_mss == find->fp_mss && 489 f->fp_flags == find->fp_flags && 490 f->fp_optcnt == find->fp_optcnt && 491 f->fp_wscale == find->fp_wscale && 492 f->fp_ttl == find->fp_ttl) 493 return (f); 494 } 495 496 return (NULL); 497 } 498 499 /* Insert a fingerprint into the list */ 500 void 501 pf_osfp_insert(struct pf_osfp_list *list, struct pf_os_fingerprint *ins) 502 { 503 struct pf_os_fingerprint *f, *prev = NULL; 504 505 /* XXX need to go semi tree based. can key on tcp options */ 506 507 SLIST_FOREACH(f, list, fp_next) 508 prev = f; 509 if (prev) 510 SLIST_INSERT_AFTER(prev, ins, fp_next); 511 else 512 SLIST_INSERT_HEAD(list, ins, fp_next); 513 } 514 515 /* Fill a fingerprint by its number (from an ioctl) */ 516 int 517 pf_osfp_get(struct pf_osfp_ioctl *fpioc) 518 { 519 struct pf_os_fingerprint *fp; 520 struct pf_osfp_entry *entry; 521 int num = fpioc->fp_getnum; 522 int i = 0; 523 524 525 memset(fpioc, 0, sizeof(*fpioc)); 526 SLIST_FOREACH(fp, &pf_osfp_list, fp_next) { 527 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 528 if (i++ == num) { 529 fpioc->fp_mss = fp->fp_mss; 530 fpioc->fp_wsize = fp->fp_wsize; 531 fpioc->fp_flags = fp->fp_flags; 532 fpioc->fp_psize = fp->fp_psize; 533 fpioc->fp_ttl = fp->fp_ttl; 534 fpioc->fp_wscale = fp->fp_wscale; 535 fpioc->fp_getnum = num; 536 memcpy(&fpioc->fp_os, entry, 537 sizeof(fpioc->fp_os)); 538 return (0); 539 } 540 } 541 } 542 543 return (EBUSY); 544 } 545 546 547 /* Validate that each signature is reachable */ 548 struct pf_os_fingerprint * 549 pf_osfp_validate(void) 550 { 551 struct pf_os_fingerprint *f, *f2, find; 552 553 SLIST_FOREACH(f, &pf_osfp_list, fp_next) { 554 memcpy(&find, f, sizeof(find)); 555 556 /* We do a few MSS/th_win percolations to make things unique */ 557 if (find.fp_mss == 0) 558 find.fp_mss = 128; 559 if (f->fp_flags & PF_OSFP_WSIZE_MSS) 560 find.fp_wsize *= find.fp_mss; 561 else if (f->fp_flags & PF_OSFP_WSIZE_MTU) 562 find.fp_wsize *= (find.fp_mss + 40); 563 else if (f->fp_flags & PF_OSFP_WSIZE_MOD) 564 find.fp_wsize *= 2; 565 if (f != (f2 = pf_osfp_find(&pf_osfp_list, &find, 0))) { 566 if (f2) 567 DPFPRINTF(LOG_NOTICE, 568 "Found \"%s %s %s\" instead of " 569 "\"%s %s %s\"\n", 570 SLIST_FIRST(&f2->fp_oses)->fp_class_nm, 571 SLIST_FIRST(&f2->fp_oses)->fp_version_nm, 572 SLIST_FIRST(&f2->fp_oses)->fp_subtype_nm, 573 SLIST_FIRST(&f->fp_oses)->fp_class_nm, 574 SLIST_FIRST(&f->fp_oses)->fp_version_nm, 575 SLIST_FIRST(&f->fp_oses)->fp_subtype_nm); 576 else 577 DPFPRINTF(LOG_NOTICE, 578 "Couldn't find \"%s %s %s\"\n", 579 SLIST_FIRST(&f->fp_oses)->fp_class_nm, 580 SLIST_FIRST(&f->fp_oses)->fp_version_nm, 581 SLIST_FIRST(&f->fp_oses)->fp_subtype_nm); 582 return (f); 583 } 584 } 585 return (NULL); 586 } 587