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 #include <sys/malloc.h> 25 #endif /* _KERNEL */ 26 #include <sys/mbuf.h> 27 28 #include <netinet/in.h> 29 #include <netinet/in_systm.h> 30 #include <netinet/ip.h> 31 #include <netinet/tcp.h> 32 33 #include <net/if.h> 34 #include <net/pf/pfvar.h> 35 36 #include <netinet/ip6.h> 37 #ifdef _KERNEL 38 #include <netinet6/in6_var.h> 39 #endif 40 41 42 #ifdef _KERNEL 43 # define DPFPRINTF(format, x...) \ 44 if (pf_status.debug >= PF_DEBUG_NOISY) \ 45 kprintf(format , ##x) 46 47 #else 48 /* Userland equivalents so we can lend code to tcpdump et al. */ 49 50 # include <arpa/inet.h> 51 # include <errno.h> 52 # include <stdio.h> 53 # include <stdlib.h> 54 # include <string.h> 55 # include <netdb.h> 56 57 # ifdef PFDEBUG 58 # include <sys/stdarg.h> 59 # define DPFPRINTF(format, x...) fprintf(stderr, format , ##x) 60 # else 61 # define DPFPRINTF(format, x...) ((void)0) 62 # endif /* PFDEBUG */ 63 #endif /* _KERNEL */ 64 65 static MALLOC_DEFINE(M_PFOSFPENTRYPL, "pfospfen", "pf OS finger printing pool list"); 66 static MALLOC_DEFINE(M_PFOSFPPL, "pfosfp", "pf OS finger printing pool list"); 67 68 SLIST_HEAD(pf_osfp_list, pf_os_fingerprint) pf_osfp_list; 69 70 struct pf_os_fingerprint *pf_osfp_find(struct pf_osfp_list *, 71 struct pf_os_fingerprint *, u_int8_t); 72 struct pf_os_fingerprint *pf_osfp_find_exact(struct pf_osfp_list *, 73 struct pf_os_fingerprint *); 74 void pf_osfp_insert(struct pf_osfp_list *, 75 struct pf_os_fingerprint *); 76 77 78 #ifdef _KERNEL 79 /* 80 * Passively fingerprint the OS of the host (IPv4 TCP SYN packets only) 81 * Returns the list of possible OSes. 82 */ 83 struct pf_osfp_enlist * 84 pf_osfp_fingerprint(struct pf_pdesc *pd, struct mbuf *m, int off, 85 const struct tcphdr *tcp) 86 { 87 struct ip *ip; 88 struct ip6_hdr *ip6; 89 char hdr[60]; 90 91 if ((pd->af != PF_INET && pd->af != PF_INET6) || 92 pd->proto != IPPROTO_TCP || (tcp->th_off << 2) < sizeof(*tcp)) 93 return (NULL); 94 95 if (pd->af == PF_INET) { 96 ip = mtod(m, struct ip *); 97 ip6 = NULL; 98 } else { 99 ip = NULL; 100 ip6 = mtod(m, struct ip6_hdr *); 101 } 102 if (!pf_pull_hdr(m, off, hdr, tcp->th_off << 2, NULL, NULL, 103 pd->af)) return (NULL); 104 105 return (pf_osfp_fingerprint_hdr(ip, ip6, (struct tcphdr *)hdr)); 106 } 107 #endif /* _KERNEL */ 108 109 struct pf_osfp_enlist * 110 pf_osfp_fingerprint_hdr(const struct ip *ip, const struct ip6_hdr *ip6, 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 & 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 = ip->ip_len; 136 fp.fp_ttl = ip->ip_ttl; 137 if (ip->ip_off & IP_DF) 138 fp.fp_flags |= PF_OSFP_DF; 139 #ifdef _KERNEL 140 kinet_ntoa(ip->ip_src, 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 strlcpy(srcname, ip6_sprintf((struct in6_addr *)&ip6->ip6_src), 164 sizeof(srcname)); 165 #else 166 memset(&sin6, 0, sizeof(sin6)); 167 sin6.sin6_family = AF_INET6; 168 sin6.sin6_len = sizeof(struct sockaddr_in6); 169 sin6.sin6_addr = ip6->ip6_src; 170 (void)getnameinfo((struct sockaddr *)&sin6, 171 sizeof(struct sockaddr_in6), srcname, sizeof(srcname), 172 NULL, 0, NI_NUMERICHOST); 173 #endif 174 } 175 #endif 176 else 177 return (NULL); 178 fp.fp_wsize = ntohs(tcp->th_win); 179 180 181 cnt = (tcp->th_off << 2) - sizeof(*tcp); 182 optp = (const u_int8_t *)((const char *)tcp + sizeof(*tcp)); 183 for (; cnt > 0; cnt -= optlen, optp += optlen) { 184 if (*optp == TCPOPT_EOL) 185 break; 186 187 fp.fp_optcnt++; 188 if (*optp == TCPOPT_NOP) { 189 fp.fp_tcpopts = (fp.fp_tcpopts << PF_OSFP_TCPOPT_BITS) | 190 PF_OSFP_TCPOPT_NOP; 191 optlen = 1; 192 } else { 193 if (cnt < 2) 194 return (NULL); 195 optlen = optp[1]; 196 if (optlen > cnt || optlen < 2) 197 return (NULL); 198 switch (*optp) { 199 case TCPOPT_MAXSEG: 200 if (optlen >= TCPOLEN_MAXSEG) 201 memcpy(&fp.fp_mss, &optp[2], 202 sizeof(fp.fp_mss)); 203 fp.fp_tcpopts = (fp.fp_tcpopts << 204 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_MSS; 205 fp.fp_mss = ntohs(fp.fp_mss); 206 break; 207 case TCPOPT_WINDOW: 208 if (optlen >= TCPOLEN_WINDOW) 209 memcpy(&fp.fp_wscale, &optp[2], 210 sizeof(fp.fp_wscale)); 211 fp.fp_tcpopts = (fp.fp_tcpopts << 212 PF_OSFP_TCPOPT_BITS) | 213 PF_OSFP_TCPOPT_WSCALE; 214 break; 215 case TCPOPT_SACK_PERMITTED: 216 fp.fp_tcpopts = (fp.fp_tcpopts << 217 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_SACK; 218 break; 219 case TCPOPT_TIMESTAMP: 220 if (optlen >= TCPOLEN_TIMESTAMP) { 221 u_int32_t ts; 222 memcpy(&ts, &optp[2], sizeof(ts)); 223 if (ts == 0) 224 fp.fp_flags |= PF_OSFP_TS0; 225 226 } 227 fp.fp_tcpopts = (fp.fp_tcpopts << 228 PF_OSFP_TCPOPT_BITS) | PF_OSFP_TCPOPT_TS; 229 break; 230 default: 231 return (NULL); 232 } 233 } 234 optlen = MAX(optlen, 1); /* paranoia */ 235 } 236 237 DPFPRINTF("fingerprinted %s:%d %d:%d:%d:%d:%llx (%d) " 238 "(TS=%s,M=%s%d,W=%s%d)\n", 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("osfp no match against %x\n", 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("osfp matched %s %s %s %x==%x\n", 277 entry->fp_class_nm, entry->fp_version_nm, 278 entry->fp_subtype_nm, os, entry->fp_os); 279 return (1); 280 } 281 } 282 DPFPRINTF("fingerprint 0x%x didn't match\n", os); 283 return (0); 284 } 285 286 /* Initialize the OS fingerprint system */ 287 void 288 pf_osfp_initialize(void) 289 { 290 SLIST_INIT(&pf_osfp_list); 291 } 292 293 /* Flush the fingerprint list */ 294 void 295 pf_osfp_flush(void) 296 { 297 struct pf_os_fingerprint *fp; 298 struct pf_osfp_entry *entry; 299 300 while ((fp = SLIST_FIRST(&pf_osfp_list))) { 301 SLIST_REMOVE_HEAD(&pf_osfp_list, fp_next); 302 while ((entry = SLIST_FIRST(&fp->fp_oses))) { 303 SLIST_REMOVE_HEAD(&fp->fp_oses, fp_entry); 304 kfree(entry, M_PFOSFPENTRYPL); 305 } 306 kfree(fp, M_PFOSFPPL); 307 } 308 } 309 310 311 /* Add a fingerprint */ 312 int 313 pf_osfp_add(struct pf_osfp_ioctl *fpioc) 314 { 315 struct pf_os_fingerprint *fp, fpadd; 316 struct pf_osfp_entry *entry; 317 318 memset(&fpadd, 0, sizeof(fpadd)); 319 fpadd.fp_tcpopts = fpioc->fp_tcpopts; 320 fpadd.fp_wsize = fpioc->fp_wsize; 321 fpadd.fp_psize = fpioc->fp_psize; 322 fpadd.fp_mss = fpioc->fp_mss; 323 fpadd.fp_flags = fpioc->fp_flags; 324 fpadd.fp_optcnt = fpioc->fp_optcnt; 325 fpadd.fp_wscale = fpioc->fp_wscale; 326 fpadd.fp_ttl = fpioc->fp_ttl; 327 328 #if 0 /* XXX RYAN wants to fix logging */ 329 DPFPRINTF("adding osfp %s %s %s = %s%d:%d:%d:%s%d:0x%llx %d " 330 "(TS=%s,M=%s%d,W=%s%d) %x\n", 331 fpioc->fp_os.fp_class_nm, fpioc->fp_os.fp_version_nm, 332 fpioc->fp_os.fp_subtype_nm, 333 (fpadd.fp_flags & PF_OSFP_WSIZE_MOD) ? "%" : 334 (fpadd.fp_flags & PF_OSFP_WSIZE_MSS) ? "S" : 335 (fpadd.fp_flags & PF_OSFP_WSIZE_MTU) ? "T" : 336 (fpadd.fp_flags & PF_OSFP_WSIZE_DC) ? "*" : "", 337 fpadd.fp_wsize, 338 fpadd.fp_ttl, 339 (fpadd.fp_flags & PF_OSFP_DF) ? 1 : 0, 340 (fpadd.fp_flags & PF_OSFP_PSIZE_MOD) ? "%" : 341 (fpadd.fp_flags & PF_OSFP_PSIZE_DC) ? "*" : "", 342 fpadd.fp_psize, 343 (long long int)fpadd.fp_tcpopts, fpadd.fp_optcnt, 344 (fpadd.fp_flags & PF_OSFP_TS0) ? "0" : "", 345 (fpadd.fp_flags & PF_OSFP_MSS_MOD) ? "%" : 346 (fpadd.fp_flags & PF_OSFP_MSS_DC) ? "*" : "", 347 fpadd.fp_mss, 348 (fpadd.fp_flags & PF_OSFP_WSCALE_MOD) ? "%" : 349 (fpadd.fp_flags & PF_OSFP_WSCALE_DC) ? "*" : "", 350 fpadd.fp_wscale, 351 fpioc->fp_os.fp_os); 352 #endif 353 354 if ((fp = pf_osfp_find_exact(&pf_osfp_list, &fpadd))) { 355 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 356 if (PF_OSFP_ENTRY_EQ(entry, &fpioc->fp_os)) 357 return (EEXIST); 358 } 359 if ((entry = kmalloc(sizeof(struct pf_osfp_entry), 360 M_PFOSFPENTRYPL, M_WAITOK|M_NULLOK)) == NULL) 361 return (ENOMEM); 362 } else { 363 if ((fp = kmalloc(sizeof(struct pf_os_fingerprint), 364 M_PFOSFPPL, M_WAITOK|M_NULLOK)) == NULL) 365 return (ENOMEM); 366 memset(fp, 0, sizeof(*fp)); 367 fp->fp_tcpopts = fpioc->fp_tcpopts; 368 fp->fp_wsize = fpioc->fp_wsize; 369 fp->fp_psize = fpioc->fp_psize; 370 fp->fp_mss = fpioc->fp_mss; 371 fp->fp_flags = fpioc->fp_flags; 372 fp->fp_optcnt = fpioc->fp_optcnt; 373 fp->fp_wscale = fpioc->fp_wscale; 374 fp->fp_ttl = fpioc->fp_ttl; 375 SLIST_INIT(&fp->fp_oses); 376 if ((entry = kmalloc(sizeof(struct pf_osfp_entry), 377 M_PFOSFPENTRYPL, M_WAITOK|M_NULLOK)) == NULL) { 378 kfree(fp, M_PFOSFPPL); 379 return (ENOMEM); 380 } 381 pf_osfp_insert(&pf_osfp_list, fp); 382 } 383 memcpy(entry, &fpioc->fp_os, sizeof(*entry)); 384 385 /* Make sure the strings are NUL terminated */ 386 entry->fp_class_nm[sizeof(entry->fp_class_nm)-1] = '\0'; 387 entry->fp_version_nm[sizeof(entry->fp_version_nm)-1] = '\0'; 388 entry->fp_subtype_nm[sizeof(entry->fp_subtype_nm)-1] = '\0'; 389 390 SLIST_INSERT_HEAD(&fp->fp_oses, entry, fp_entry); 391 392 #ifdef PFDEBUG 393 if ((fp = pf_osfp_validate())) 394 kprintf("Invalid fingerprint list\n"); 395 #endif /* PFDEBUG */ 396 return (0); 397 } 398 399 400 /* Find a fingerprint in the list */ 401 struct pf_os_fingerprint * 402 pf_osfp_find(struct pf_osfp_list *list, struct pf_os_fingerprint *find, 403 u_int8_t ttldiff) 404 { 405 struct pf_os_fingerprint *f; 406 407 #define MATCH_INT(_MOD, _DC, _field) \ 408 if ((f->fp_flags & _DC) == 0) { \ 409 if ((f->fp_flags & _MOD) == 0) { \ 410 if (f->_field != find->_field) \ 411 continue; \ 412 } else { \ 413 if (f->_field == 0 || find->_field % f->_field) \ 414 continue; \ 415 } \ 416 } 417 418 SLIST_FOREACH(f, list, fp_next) { 419 if (f->fp_tcpopts != find->fp_tcpopts || 420 f->fp_optcnt != find->fp_optcnt || 421 f->fp_ttl < find->fp_ttl || 422 f->fp_ttl - find->fp_ttl > ttldiff || 423 (f->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0)) != 424 (find->fp_flags & (PF_OSFP_DF|PF_OSFP_TS0))) 425 continue; 426 427 MATCH_INT(PF_OSFP_PSIZE_MOD, PF_OSFP_PSIZE_DC, fp_psize) 428 MATCH_INT(PF_OSFP_MSS_MOD, PF_OSFP_MSS_DC, fp_mss) 429 MATCH_INT(PF_OSFP_WSCALE_MOD, PF_OSFP_WSCALE_DC, fp_wscale) 430 if ((f->fp_flags & PF_OSFP_WSIZE_DC) == 0) { 431 if (f->fp_flags & PF_OSFP_WSIZE_MSS) { 432 if (find->fp_mss == 0) 433 continue; 434 435 /* Some "smart" NAT devices and DSL routers will tweak the MSS size and 436 * will set it to whatever is suitable for the link type. 437 */ 438 #define SMART_MSS 1460 439 if ((find->fp_wsize % find->fp_mss || 440 find->fp_wsize / find->fp_mss != 441 f->fp_wsize) && 442 (find->fp_wsize % SMART_MSS || 443 find->fp_wsize / SMART_MSS != 444 f->fp_wsize)) 445 continue; 446 } else if (f->fp_flags & PF_OSFP_WSIZE_MTU) { 447 if (find->fp_mss == 0) 448 continue; 449 450 #define MTUOFF (sizeof(struct ip) + sizeof(struct tcphdr)) 451 #define SMART_MTU (SMART_MSS + MTUOFF) 452 if ((find->fp_wsize % (find->fp_mss + MTUOFF) || 453 find->fp_wsize / (find->fp_mss + MTUOFF) != 454 f->fp_wsize) && 455 (find->fp_wsize % SMART_MTU || 456 find->fp_wsize / SMART_MTU != 457 f->fp_wsize)) 458 continue; 459 } else if (f->fp_flags & PF_OSFP_WSIZE_MOD) { 460 if (f->fp_wsize == 0 || find->fp_wsize % 461 f->fp_wsize) 462 continue; 463 } else { 464 if (f->fp_wsize != find->fp_wsize) 465 continue; 466 } 467 } 468 return (f); 469 } 470 471 return (NULL); 472 } 473 474 /* Find an exact fingerprint in the list */ 475 struct pf_os_fingerprint * 476 pf_osfp_find_exact(struct pf_osfp_list *list, struct pf_os_fingerprint *find) 477 { 478 struct pf_os_fingerprint *f; 479 480 SLIST_FOREACH(f, list, fp_next) { 481 if (f->fp_tcpopts == find->fp_tcpopts && 482 f->fp_wsize == find->fp_wsize && 483 f->fp_psize == find->fp_psize && 484 f->fp_mss == find->fp_mss && 485 f->fp_flags == find->fp_flags && 486 f->fp_optcnt == find->fp_optcnt && 487 f->fp_wscale == find->fp_wscale && 488 f->fp_ttl == find->fp_ttl) 489 return (f); 490 } 491 492 return (NULL); 493 } 494 495 /* Insert a fingerprint into the list */ 496 void 497 pf_osfp_insert(struct pf_osfp_list *list, struct pf_os_fingerprint *ins) 498 { 499 struct pf_os_fingerprint *f, *prev = NULL; 500 501 /* XXX need to go semi tree based. can key on tcp options */ 502 503 SLIST_FOREACH(f, list, fp_next) 504 prev = f; 505 if (prev) 506 SLIST_INSERT_AFTER(prev, ins, fp_next); 507 else 508 SLIST_INSERT_HEAD(list, ins, fp_next); 509 } 510 511 /* Fill a fingerprint by its number (from an ioctl) */ 512 int 513 pf_osfp_get(struct pf_osfp_ioctl *fpioc) 514 { 515 struct pf_os_fingerprint *fp; 516 struct pf_osfp_entry *entry; 517 int num = fpioc->fp_getnum; 518 int i = 0; 519 520 521 memset(fpioc, 0, sizeof(*fpioc)); 522 SLIST_FOREACH(fp, &pf_osfp_list, fp_next) { 523 SLIST_FOREACH(entry, &fp->fp_oses, fp_entry) { 524 if (i++ == num) { 525 fpioc->fp_mss = fp->fp_mss; 526 fpioc->fp_wsize = fp->fp_wsize; 527 fpioc->fp_flags = fp->fp_flags; 528 fpioc->fp_psize = fp->fp_psize; 529 fpioc->fp_ttl = fp->fp_ttl; 530 fpioc->fp_wscale = fp->fp_wscale; 531 fpioc->fp_getnum = num; 532 memcpy(&fpioc->fp_os, entry, 533 sizeof(fpioc->fp_os)); 534 return (0); 535 } 536 } 537 } 538 539 return (EBUSY); 540 } 541 542 543 /* Validate that each signature is reachable */ 544 struct pf_os_fingerprint * 545 pf_osfp_validate(void) 546 { 547 struct pf_os_fingerprint *f, *f2, find; 548 549 SLIST_FOREACH(f, &pf_osfp_list, fp_next) { 550 memcpy(&find, f, sizeof(find)); 551 552 /* We do a few MSS/th_win percolations to make things unique */ 553 if (find.fp_mss == 0) 554 find.fp_mss = 128; 555 if (f->fp_flags & PF_OSFP_WSIZE_MSS) 556 find.fp_wsize *= find.fp_mss; 557 else if (f->fp_flags & PF_OSFP_WSIZE_MTU) 558 find.fp_wsize *= (find.fp_mss + 40); 559 else if (f->fp_flags & PF_OSFP_WSIZE_MOD) 560 find.fp_wsize *= 2; 561 if (f != (f2 = pf_osfp_find(&pf_osfp_list, &find, 0))) { 562 if (f2) 563 kprintf("Found \"%s %s %s\" instead of " 564 "\"%s %s %s\"\n", 565 SLIST_FIRST(&f2->fp_oses)->fp_class_nm, 566 SLIST_FIRST(&f2->fp_oses)->fp_version_nm, 567 SLIST_FIRST(&f2->fp_oses)->fp_subtype_nm, 568 SLIST_FIRST(&f->fp_oses)->fp_class_nm, 569 SLIST_FIRST(&f->fp_oses)->fp_version_nm, 570 SLIST_FIRST(&f->fp_oses)->fp_subtype_nm); 571 else 572 kprintf("Couldn't find \"%s %s %s\"\n", 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 return (f); 577 } 578 } 579 return (NULL); 580 } 581