1 /* $OpenBSD: pf_osfp.c,v 1.15 2008/06/14 02:22:13 henning 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 #endif /* _KERNEL */ 25 #include <sys/mbuf.h> 26 27 #include <netinet/in.h> 28 #include <netinet/in_systm.h> 29 #include <netinet/ip.h> 30 #include <netinet/tcp.h> 31 32 #include <net/if.h> 33 #include <net/pf/pfvar.h> 34 35 #include <netinet/ip6.h> 36 #ifdef _KERNEL 37 #include <netinet6/in6_var.h> 38 #endif 39 40 41 #ifdef _KERNEL 42 # define DPFPRINTF(format, x...) \ 43 if (pf_status.debug >= PF_DEBUG_NOISY) \ 44 kprintf(format , ##x) 45 46 #else 47 /* Userland equivalents so we can lend code to tcpdump et al. */ 48 49 # include <arpa/inet.h> 50 # include <errno.h> 51 # include <stdio.h> 52 # include <stdlib.h> 53 # include <string.h> 54 # include <netdb.h> 55 56 # ifdef PFDEBUG 57 # include <sys/stdarg.h> 58 # define DPFPRINTF(format, x...) fprintf(stderr, format , ##x) 59 # else 60 # define DPFPRINTF(format, x...) ((void)0) 61 # endif /* PFDEBUG */ 62 #endif /* _KERNEL */ 63 64 static MALLOC_DEFINE(M_PFOSFPENTRYPL, "pfospfen", "pf OS finger printing pool list"); 65 static MALLOC_DEFINE(M_PFOSFPPL, "pfosfp", "pf OS finger printing pool list"); 66 67 SLIST_HEAD(pf_osfp_list, pf_os_fingerprint) pf_osfp_list; 68 69 struct pf_os_fingerprint *pf_osfp_find(struct pf_osfp_list *, 70 struct pf_os_fingerprint *, u_int8_t); 71 struct pf_os_fingerprint *pf_osfp_find_exact(struct pf_osfp_list *, 72 struct pf_os_fingerprint *); 73 void pf_osfp_insert(struct pf_osfp_list *, 74 struct pf_os_fingerprint *); 75 76 77 #ifdef _KERNEL 78 /* 79 * Passively fingerprint the OS of the host (IPv4 TCP SYN packets only) 80 * Returns the list of possible OSes. 81 */ 82 struct pf_osfp_enlist * 83 pf_osfp_fingerprint(struct pf_pdesc *pd, struct mbuf *m, int off, 84 const struct tcphdr *tcp) 85 { 86 struct ip *ip; 87 struct ip6_hdr *ip6; 88 char hdr[60]; 89 90 if ((pd->af != PF_INET && pd->af != PF_INET6) || 91 pd->proto != IPPROTO_TCP || (tcp->th_off << 2) < sizeof(*tcp)) 92 return (NULL); 93 94 if (pd->af == PF_INET) { 95 ip = mtod(m, struct ip *); 96 ip6 = NULL; 97 } else { 98 ip = NULL; 99 ip6 = mtod(m, struct ip6_hdr *); 100 } 101 if (!pf_pull_hdr(m, off, hdr, tcp->th_off << 2, NULL, NULL, 102 pd->af)) 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, const struct tcphdr *tcp) 110 { 111 struct pf_os_fingerprint fp, *fpresult; 112 int cnt, optlen = 0; 113 const u_int8_t *optp; 114 #ifdef _KERNEL 115 char srcname[128]; 116 #else 117 char srcname[NI_MAXHOST]; 118 #endif 119 120 if ((tcp->th_flags & (TH_SYN|TH_ACK)) != TH_SYN) 121 return (NULL); 122 if (ip) { 123 if ((ip->ip_off & IP_OFFMASK) != 0) 124 return (NULL); 125 } 126 127 memset(&fp, 0, sizeof(fp)); 128 129 if (ip) { 130 #ifndef _KERNEL 131 struct sockaddr_in sin; 132 #endif 133 134 fp.fp_psize = ip->ip_len; 135 fp.fp_ttl = ip->ip_ttl; 136 if (ip->ip_off & IP_DF) 137 fp.fp_flags |= PF_OSFP_DF; 138 #ifdef _KERNEL 139 kinet_ntoa(ip->ip_src, srcname); 140 #else 141 memset(&sin, 0, sizeof(sin)); 142 sin.sin_family = AF_INET; 143 sin.sin_len = sizeof(struct sockaddr_in); 144 sin.sin_addr = ip->ip_src; 145 (void)getnameinfo((struct sockaddr *)&sin, 146 sizeof(struct sockaddr_in), srcname, sizeof(srcname), 147 NULL, 0, NI_NUMERICHOST); 148 #endif 149 } 150 #ifdef INET6 151 else if (ip6) { 152 #ifndef _KERNEL 153 struct sockaddr_in6 sin6; 154 #endif 155 156 /* jumbo payload? */ 157 fp.fp_psize = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 158 fp.fp_ttl = ip6->ip6_hlim; 159 fp.fp_flags |= PF_OSFP_DF; 160 fp.fp_flags |= PF_OSFP_INET6; 161 #ifdef _KERNEL 162 strlcpy(srcname, ip6_sprintf((struct in6_addr *)&ip6->ip6_src), 163 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 fp.fp_mss = 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("fingerprinted %s:%d %d:%d:%d:%d:%llx (%d) " 237 "(TS=%s,M=%s%d,W=%s%d)\n", 238 srcname, ntohs(tcp->th_sport), 239 fp.fp_wsize, fp.fp_ttl, (fp.fp_flags & PF_OSFP_DF) != 0, 240 fp.fp_psize, (long long int)fp.fp_tcpopts, fp.fp_optcnt, 241 (fp.fp_flags & PF_OSFP_TS0) ? "0" : "", 242 (fp.fp_flags & PF_OSFP_MSS_MOD) ? "%" : 243 (fp.fp_flags & PF_OSFP_MSS_DC) ? "*" : "", 244 fp.fp_mss, 245 (fp.fp_flags & PF_OSFP_WSCALE_MOD) ? "%" : 246 (fp.fp_flags & PF_OSFP_WSCALE_DC) ? "*" : "", 247 fp.fp_wscale); 248 249 if ((fpresult = pf_osfp_find(&pf_osfp_list, &fp, 250 PF_OSFP_MAXTTL_OFFSET))) 251 return (&fpresult->fp_oses); 252 return (NULL); 253 } 254 255 /* Match a fingerprint ID against a list of OSes */ 256 int 257 pf_osfp_match(struct pf_osfp_enlist *list, pf_osfp_t os) 258 { 259 struct pf_osfp_entry *entry; 260 int os_class, os_version, os_subtype; 261 int en_class, en_version, en_subtype; 262 263 if (os == PF_OSFP_ANY) 264 return (1); 265 if (list == NULL) { 266 DPFPRINTF("osfp no match against %x\n", os); 267 return (os == PF_OSFP_UNKNOWN); 268 } 269 PF_OSFP_UNPACK(os, os_class, os_version, os_subtype); 270 SLIST_FOREACH(entry, list, fp_entry) { 271 PF_OSFP_UNPACK(entry->fp_os, en_class, en_version, en_subtype); 272 if ((os_class == PF_OSFP_ANY || en_class == os_class) && 273 (os_version == PF_OSFP_ANY || en_version == os_version) && 274 (os_subtype == PF_OSFP_ANY || en_subtype == os_subtype)) { 275 DPFPRINTF("osfp matched %s %s %s %x==%x\n", 276 entry->fp_class_nm, entry->fp_version_nm, 277 entry->fp_subtype_nm, os, entry->fp_os); 278 return (1); 279 } 280 } 281 DPFPRINTF("fingerprint 0x%x didn't match\n", os); 282 return (0); 283 } 284 285 /* Initialize the OS fingerprint system */ 286 void 287 pf_osfp_initialize(void) 288 { 289 SLIST_INIT(&pf_osfp_list); 290 } 291 292 /* Flush the fingerprint list */ 293 void 294 pf_osfp_flush(void) 295 { 296 struct pf_os_fingerprint *fp; 297 struct pf_osfp_entry *entry; 298 299 while ((fp = SLIST_FIRST(&pf_osfp_list))) { 300 SLIST_REMOVE_HEAD(&pf_osfp_list, fp_next); 301 while ((entry = SLIST_FIRST(&fp->fp_oses))) { 302 SLIST_REMOVE_HEAD(&fp->fp_oses, fp_entry); 303 kfree(entry, M_PFOSFPENTRYPL); 304 } 305 kfree(fp, M_PFOSFPPL); 306 } 307 } 308 309 310 /* Add a fingerprint */ 311 int 312 pf_osfp_add(struct pf_osfp_ioctl *fpioc) 313 { 314 struct pf_os_fingerprint *fp, fpadd; 315 struct pf_osfp_entry *entry; 316 317 memset(&fpadd, 0, sizeof(fpadd)); 318 fpadd.fp_tcpopts = fpioc->fp_tcpopts; 319 fpadd.fp_wsize = fpioc->fp_wsize; 320 fpadd.fp_psize = fpioc->fp_psize; 321 fpadd.fp_mss = fpioc->fp_mss; 322 fpadd.fp_flags = fpioc->fp_flags; 323 fpadd.fp_optcnt = fpioc->fp_optcnt; 324 fpadd.fp_wscale = fpioc->fp_wscale; 325 fpadd.fp_ttl = fpioc->fp_ttl; 326 327 #if 0 /* XXX RYAN wants to fix logging */ 328 DPFPRINTF("adding osfp %s %s %s = %s%d:%d:%d:%s%d:0x%llx %d " 329 "(TS=%s,M=%s%d,W=%s%d) %x\n", 330 fpioc->fp_os.fp_class_nm, fpioc->fp_os.fp_version_nm, 331 fpioc->fp_os.fp_subtype_nm, 332 (fpadd.fp_flags & PF_OSFP_WSIZE_MOD) ? "%" : 333 (fpadd.fp_flags & PF_OSFP_WSIZE_MSS) ? "S" : 334 (fpadd.fp_flags & PF_OSFP_WSIZE_MTU) ? "T" : 335 (fpadd.fp_flags & PF_OSFP_WSIZE_DC) ? "*" : "", 336 fpadd.fp_wsize, 337 fpadd.fp_ttl, 338 (fpadd.fp_flags & PF_OSFP_DF) ? 1 : 0, 339 (fpadd.fp_flags & PF_OSFP_PSIZE_MOD) ? "%" : 340 (fpadd.fp_flags & PF_OSFP_PSIZE_DC) ? "*" : "", 341 fpadd.fp_psize, 342 (long long int)fpadd.fp_tcpopts, fpadd.fp_optcnt, 343 (fpadd.fp_flags & PF_OSFP_TS0) ? "0" : "", 344 (fpadd.fp_flags & PF_OSFP_MSS_MOD) ? "%" : 345 (fpadd.fp_flags & PF_OSFP_MSS_DC) ? "*" : "", 346 fpadd.fp_mss, 347 (fpadd.fp_flags & PF_OSFP_WSCALE_MOD) ? "%" : 348 (fpadd.fp_flags & PF_OSFP_WSCALE_DC) ? "*" : "", 349 fpadd.fp_wscale, 350 fpioc->fp_os.fp_os); 351 #endif 352 353 if ((fp = pf_osfp_find_exact(&pf_osfp_list, &fpadd))) { 354 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 355 if (PF_OSFP_ENTRY_EQ(entry, &fpioc->fp_os)) 356 return (EEXIST); 357 } 358 if ((entry = kmalloc(sizeof(struct pf_osfp_entry), 359 M_PFOSFPENTRYPL, M_WAITOK|M_NULLOK)) == NULL) 360 return (ENOMEM); 361 } else { 362 if ((fp = kmalloc(sizeof(struct pf_os_fingerprint), 363 M_PFOSFPPL, M_WAITOK|M_NULLOK)) == NULL) 364 return (ENOMEM); 365 memset(fp, 0, sizeof(*fp)); 366 fp->fp_tcpopts = fpioc->fp_tcpopts; 367 fp->fp_wsize = fpioc->fp_wsize; 368 fp->fp_psize = fpioc->fp_psize; 369 fp->fp_mss = fpioc->fp_mss; 370 fp->fp_flags = fpioc->fp_flags; 371 fp->fp_optcnt = fpioc->fp_optcnt; 372 fp->fp_wscale = fpioc->fp_wscale; 373 fp->fp_ttl = fpioc->fp_ttl; 374 SLIST_INIT(&fp->fp_oses); 375 if ((entry = kmalloc(sizeof(struct pf_osfp_entry), 376 M_PFOSFPENTRYPL, M_WAITOK|M_NULLOK)) == NULL) { 377 kfree(fp, M_PFOSFPPL); 378 return (ENOMEM); 379 } 380 pf_osfp_insert(&pf_osfp_list, fp); 381 } 382 memcpy(entry, &fpioc->fp_os, sizeof(*entry)); 383 384 /* Make sure the strings are NUL terminated */ 385 entry->fp_class_nm[sizeof(entry->fp_class_nm)-1] = '\0'; 386 entry->fp_version_nm[sizeof(entry->fp_version_nm)-1] = '\0'; 387 entry->fp_subtype_nm[sizeof(entry->fp_subtype_nm)-1] = '\0'; 388 389 SLIST_INSERT_HEAD(&fp->fp_oses, entry, fp_entry); 390 391 #ifdef PFDEBUG 392 if ((fp = pf_osfp_validate())) 393 kprintf("Invalid fingerprint list\n"); 394 #endif /* PFDEBUG */ 395 return (0); 396 } 397 398 399 /* Find a fingerprint in the list */ 400 struct pf_os_fingerprint * 401 pf_osfp_find(struct pf_osfp_list *list, struct pf_os_fingerprint *find, 402 u_int8_t ttldiff) 403 { 404 struct pf_os_fingerprint *f; 405 406 #define MATCH_INT(_MOD, _DC, _field) \ 407 if ((f->fp_flags & _DC) == 0) { \ 408 if ((f->fp_flags & _MOD) == 0) { \ 409 if (f->_field != find->_field) \ 410 continue; \ 411 } else { \ 412 if (f->_field == 0 || find->_field % f->_field) \ 413 continue; \ 414 } \ 415 } 416 417 SLIST_FOREACH(f, list, fp_next) { 418 if (f->fp_tcpopts != find->fp_tcpopts || 419 f->fp_optcnt != find->fp_optcnt || 420 f->fp_ttl < find->fp_ttl || 421 f->fp_ttl - find->fp_ttl > ttldiff || 422 (f->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0)) != 423 (find->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0))) 424 continue; 425 426 MATCH_INT(PF_OSFP_PSIZE_MOD, PF_OSFP_PSIZE_DC, fp_psize) 427 MATCH_INT(PF_OSFP_MSS_MOD, PF_OSFP_MSS_DC, fp_mss) 428 MATCH_INT(PF_OSFP_WSCALE_MOD, PF_OSFP_WSCALE_DC, fp_wscale) 429 if ((f->fp_flags & PF_OSFP_WSIZE_DC) == 0) { 430 if (f->fp_flags & PF_OSFP_WSIZE_MSS) { 431 if (find->fp_mss == 0) 432 continue; 433 434 /* Some "smart" NAT devices and DSL routers will tweak the MSS size and 435 * will set it to whatever is suitable for the link type. 436 */ 437 #define SMART_MSS 1460 438 if ((find->fp_wsize % find->fp_mss || 439 find->fp_wsize / find->fp_mss != 440 f->fp_wsize) && 441 (find->fp_wsize % SMART_MSS || 442 find->fp_wsize / SMART_MSS != 443 f->fp_wsize)) 444 continue; 445 } else if (f->fp_flags & PF_OSFP_WSIZE_MTU) { 446 if (find->fp_mss == 0) 447 continue; 448 449 #define MTUOFF (sizeof(struct ip) + sizeof(struct tcphdr)) 450 #define SMART_MTU (SMART_MSS + MTUOFF) 451 if ((find->fp_wsize % (find->fp_mss + MTUOFF) || 452 find->fp_wsize / (find->fp_mss + MTUOFF) != 453 f->fp_wsize) && 454 (find->fp_wsize % SMART_MTU || 455 find->fp_wsize / SMART_MTU != 456 f->fp_wsize)) 457 continue; 458 } else if (f->fp_flags & PF_OSFP_WSIZE_MOD) { 459 if (f->fp_wsize == 0 || find->fp_wsize % 460 f->fp_wsize) 461 continue; 462 } else { 463 if (f->fp_wsize != find->fp_wsize) 464 continue; 465 } 466 } 467 return (f); 468 } 469 470 return (NULL); 471 } 472 473 /* Find an exact fingerprint in the list */ 474 struct pf_os_fingerprint * 475 pf_osfp_find_exact(struct pf_osfp_list *list, struct pf_os_fingerprint *find) 476 { 477 struct pf_os_fingerprint *f; 478 479 SLIST_FOREACH(f, list, fp_next) { 480 if (f->fp_tcpopts == find->fp_tcpopts && 481 f->fp_wsize == find->fp_wsize && 482 f->fp_psize == find->fp_psize && 483 f->fp_mss == find->fp_mss && 484 f->fp_flags == find->fp_flags && 485 f->fp_optcnt == find->fp_optcnt && 486 f->fp_wscale == find->fp_wscale && 487 f->fp_ttl == find->fp_ttl) 488 return (f); 489 } 490 491 return (NULL); 492 } 493 494 /* Insert a fingerprint into the list */ 495 void 496 pf_osfp_insert(struct pf_osfp_list *list, struct pf_os_fingerprint *ins) 497 { 498 struct pf_os_fingerprint *f, *prev = NULL; 499 500 /* XXX need to go semi tree based. can key on tcp options */ 501 502 SLIST_FOREACH(f, list, fp_next) 503 prev = f; 504 if (prev) 505 SLIST_INSERT_AFTER(prev, ins, fp_next); 506 else 507 SLIST_INSERT_HEAD(list, ins, fp_next); 508 } 509 510 /* Fill a fingerprint by its number (from an ioctl) */ 511 int 512 pf_osfp_get(struct pf_osfp_ioctl *fpioc) 513 { 514 struct pf_os_fingerprint *fp; 515 struct pf_osfp_entry *entry; 516 int num = fpioc->fp_getnum; 517 int i = 0; 518 519 520 memset(fpioc, 0, sizeof(*fpioc)); 521 SLIST_FOREACH(fp, &pf_osfp_list, fp_next) { 522 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 523 if (i++ == num) { 524 fpioc->fp_mss = fp->fp_mss; 525 fpioc->fp_wsize = fp->fp_wsize; 526 fpioc->fp_flags = fp->fp_flags; 527 fpioc->fp_psize = fp->fp_psize; 528 fpioc->fp_ttl = fp->fp_ttl; 529 fpioc->fp_wscale = fp->fp_wscale; 530 fpioc->fp_getnum = num; 531 memcpy(&fpioc->fp_os, entry, 532 sizeof(fpioc->fp_os)); 533 return (0); 534 } 535 } 536 } 537 538 return (EBUSY); 539 } 540 541 542 /* Validate that each signature is reachable */ 543 struct pf_os_fingerprint * 544 pf_osfp_validate(void) 545 { 546 struct pf_os_fingerprint *f, *f2, find; 547 548 SLIST_FOREACH(f, &pf_osfp_list, fp_next) { 549 memcpy(&find, f, sizeof(find)); 550 551 /* We do a few MSS/th_win percolations to make things unique */ 552 if (find.fp_mss == 0) 553 find.fp_mss = 128; 554 if (f->fp_flags & PF_OSFP_WSIZE_MSS) 555 find.fp_wsize *= find.fp_mss; 556 else if (f->fp_flags & PF_OSFP_WSIZE_MTU) 557 find.fp_wsize *= (find.fp_mss + 40); 558 else if (f->fp_flags & PF_OSFP_WSIZE_MOD) 559 find.fp_wsize *= 2; 560 if (f != (f2 = pf_osfp_find(&pf_osfp_list, &find, 0))) { 561 if (f2) 562 kprintf("Found \"%s %s %s\" instead of " 563 "\"%s %s %s\"\n", 564 SLIST_FIRST(&f2->fp_oses)->fp_class_nm, 565 SLIST_FIRST(&f2->fp_oses)->fp_version_nm, 566 SLIST_FIRST(&f2->fp_oses)->fp_subtype_nm, 567 SLIST_FIRST(&f->fp_oses)->fp_class_nm, 568 SLIST_FIRST(&f->fp_oses)->fp_version_nm, 569 SLIST_FIRST(&f->fp_oses)->fp_subtype_nm); 570 else 571 kprintf("Couldn't find \"%s %s %s\"\n", 572 SLIST_FIRST(&f->fp_oses)->fp_class_nm, 573 SLIST_FIRST(&f->fp_oses)->fp_version_nm, 574 SLIST_FIRST(&f->fp_oses)->fp_subtype_nm); 575 return (f); 576 } 577 } 578 return (NULL); 579 } 580