1 /* 2 * Copyright (C) 1997-2003 by Darren Reed. 3 * 4 * See the IPFILTER.LICENCE file for details on licencing. 5 * 6 * $Id: ip_log.c,v 2.75.2.7 2005/06/11 07:47:44 darrenr Exp $ 7 * 8 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 9 * Use is subject to license terms. 10 */ 11 12 #pragma ident "%Z%%M% %I% %E% SMI" 13 14 #include <sys/param.h> 15 #if defined(KERNEL) || defined(_KERNEL) 16 # undef KERNEL 17 # undef _KERNEL 18 # define KERNEL 1 19 # define _KERNEL 1 20 #endif 21 #if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \ 22 defined(_KERNEL) 23 # include "opt_ipfilter_log.h" 24 #endif 25 #if defined(__FreeBSD__) && !defined(IPFILTER_LKM) 26 # if defined(_KERNEL) 27 # if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000) 28 # include "opt_ipfilter.h" 29 # endif 30 # else 31 # include <osreldate.h> 32 # endif 33 #endif 34 #ifndef SOLARIS 35 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 36 #endif 37 #include <sys/errno.h> 38 #include <sys/types.h> 39 #include <sys/file.h> 40 #ifndef _KERNEL 41 # include <stdio.h> 42 # include <string.h> 43 # include <stdlib.h> 44 # include <ctype.h> 45 # define _KERNEL 46 # define KERNEL 47 # ifdef __OpenBSD__ 48 struct file; 49 # endif 50 # include <sys/uio.h> 51 # undef _KERNEL 52 # undef KERNEL 53 #endif 54 #if __FreeBSD_version >= 220000 && defined(_KERNEL) 55 # include <sys/fcntl.h> 56 # include <sys/filio.h> 57 #else 58 # include <sys/ioctl.h> 59 #endif 60 #include <sys/time.h> 61 #if defined(_KERNEL) 62 # include <sys/systm.h> 63 # if defined(NetBSD) && (__NetBSD_Version__ >= 104000000) 64 # include <sys/proc.h> 65 # endif 66 #endif /* _KERNEL */ 67 #if !SOLARIS && !defined(__hpux) && !defined(linux) 68 # if (NetBSD > 199609) || (OpenBSD > 199603) || (__FreeBSD_version >= 300000) 69 # include <sys/dirent.h> 70 # else 71 # include <sys/dir.h> 72 # endif 73 # include <sys/mbuf.h> 74 #else 75 # if !defined(__hpux) && defined(_KERNEL) 76 # include <sys/filio.h> 77 # include <sys/cred.h> 78 # include <sys/ddi.h> 79 # include <sys/sunddi.h> 80 # include <sys/ksynch.h> 81 # include <sys/kmem.h> 82 # include <sys/mkdev.h> 83 # include <sys/dditypes.h> 84 # include <sys/cmn_err.h> 85 # endif /* !__hpux */ 86 #endif /* !SOLARIS && !__hpux */ 87 #if !defined(linux) 88 # include <sys/protosw.h> 89 #endif 90 #include <sys/socket.h> 91 92 #include <net/if.h> 93 #ifdef sun 94 # include <net/af.h> 95 #endif 96 #if __FreeBSD_version >= 300000 97 # include <net/if_var.h> 98 #endif 99 #include <net/route.h> 100 #include <netinet/in.h> 101 #ifdef __sgi 102 # include <sys/ddi.h> 103 # ifdef IFF_DRVRLOCK /* IRIX6 */ 104 # include <sys/hashing.h> 105 # endif 106 #endif 107 #if !defined(__hpux) && !defined(linux) && \ 108 !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/ 109 # include <netinet/in_var.h> 110 #endif 111 #include <netinet/in_systm.h> 112 #include <netinet/ip.h> 113 #include <netinet/tcp.h> 114 #include <netinet/udp.h> 115 #include <netinet/ip_icmp.h> 116 #ifdef USE_INET6 117 # include <netinet/icmp6.h> 118 #endif 119 #if !defined(linux) 120 # include <netinet/ip_var.h> 121 #endif 122 #ifndef _KERNEL 123 # include <syslog.h> 124 #endif 125 #include "netinet/ip_compat.h" 126 #include <netinet/tcpip.h> 127 #include "netinet/ip_fil.h" 128 #include "netinet/ip_nat.h" 129 #include "netinet/ip_frag.h" 130 #include "netinet/ip_state.h" 131 #include "netinet/ip_auth.h" 132 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__) 133 # include <sys/malloc.h> 134 #endif 135 /* END OF INCLUDES */ 136 137 #ifdef IPFILTER_LOG 138 139 # if defined(IPL_SELECT) 140 # include <machine/sys/user.h> 141 # include <sys/kthread_iface.h> 142 # define READ_COLLISION 0x001 143 144 iplog_select_t iplog_ss[IPL_LOGMAX+1]; 145 146 extern int selwait; 147 # endif /* IPL_SELECT */ 148 149 # if defined(linux) && defined(_KERNEL) 150 wait_queue_head_t iplh_linux[IPL_LOGSIZE]; 151 # endif 152 # if SOLARIS 153 extern kcondvar_t iplwait; 154 # endif 155 156 iplog_t **iplh[IPL_LOGSIZE], *iplt[IPL_LOGSIZE], *ipll[IPL_LOGSIZE]; 157 int iplused[IPL_LOGSIZE]; 158 static fr_info_t iplcrc[IPL_LOGSIZE]; 159 int ipl_suppress = 1; 160 int ipl_buffer_sz; 161 int ipl_logmax = IPL_LOGMAX; 162 int ipl_logall = 0; 163 int ipl_log_init = 0; 164 int ipl_logsize = IPFILTER_LOGSIZE; 165 int ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE, 166 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, 167 IPL_MAGIC, IPL_MAGIC }; 168 169 170 /* ------------------------------------------------------------------------ */ 171 /* Function: fr_loginit */ 172 /* Returns: int - 0 == success (always returned) */ 173 /* Parameters: Nil */ 174 /* */ 175 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ 176 /* secret for use in calculating the "last log checksum". */ 177 /* ------------------------------------------------------------------------ */ 178 int fr_loginit() 179 { 180 int i; 181 182 for (i = IPL_LOGMAX; i >= 0; i--) { 183 iplt[i] = NULL; 184 ipll[i] = NULL; 185 iplh[i] = &iplt[i]; 186 iplused[i] = 0; 187 bzero((char *)&iplcrc[i], sizeof(iplcrc[i])); 188 # ifdef IPL_SELECT 189 iplog_ss[i].read_waiter = 0; 190 iplog_ss[i].state = 0; 191 # endif 192 # if defined(linux) && defined(_KERNEL) 193 init_waitqueue_head(iplh_linux + i); 194 # endif 195 } 196 197 # if SOLARIS && defined(_KERNEL) 198 cv_init(&iplwait, "ipl condvar", CV_DRIVER, NULL); 199 # endif 200 MUTEX_INIT(&ipl_mutex, "ipf log mutex"); 201 202 ipl_log_init = 1; 203 204 return 0; 205 } 206 207 208 /* ------------------------------------------------------------------------ */ 209 /* Function: fr_logunload */ 210 /* Returns: Nil */ 211 /* Parameters: Nil */ 212 /* */ 213 /* Clean up any log data that has accumulated without being read. */ 214 /* ------------------------------------------------------------------------ */ 215 void fr_logunload() 216 { 217 int i; 218 219 if (ipl_log_init == 0) 220 return; 221 222 for (i = IPL_LOGMAX; i >= 0; i--) 223 (void) ipflog_clear(i); 224 225 # if SOLARIS && defined(_KERNEL) 226 cv_destroy(&iplwait); 227 # endif 228 MUTEX_DESTROY(&ipl_mutex); 229 230 ipl_log_init = 0; 231 } 232 233 234 /* ------------------------------------------------------------------------ */ 235 /* Function: ipflog */ 236 /* Returns: int - 0 == success, -1 == failure */ 237 /* Parameters: fin(I) - pointer to packet information */ 238 /* flags(I) - flags from filter rules */ 239 /* */ 240 /* Create a log record for a packet given that it has been triggered by a */ 241 /* rule (or the default setting). Calculate the transport protocol header */ 242 /* size using predetermined size of a couple of popular protocols and thus */ 243 /* how much data to copy into the log, including part of the data body if */ 244 /* requested. */ 245 /* ------------------------------------------------------------------------ */ 246 int ipflog(fin, flags) 247 fr_info_t *fin; 248 u_int flags; 249 { 250 register size_t hlen; 251 int types[2], mlen; 252 size_t sizes[2]; 253 void *ptrs[2]; 254 ipflog_t ipfl; 255 u_char p; 256 mb_t *m; 257 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) 258 # ifndef IRE_ILL_CN 259 qif_t *ifp; 260 # else 261 s_ill_t *ifp; 262 # endif /* IRE_ILL_CN */ 263 # else 264 struct ifnet *ifp; 265 # endif /* SOLARIS || __hpux */ 266 267 ipfl.fl_nattag.ipt_num[0] = 0; 268 m = fin->fin_m; 269 ifp = fin->fin_ifp; 270 hlen = fin->fin_hlen; 271 /* 272 * calculate header size. 273 */ 274 if (fin->fin_off == 0) { 275 p = fin->fin_fi.fi_p; 276 if (p == IPPROTO_TCP) 277 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); 278 else if (p == IPPROTO_UDP) 279 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); 280 else if (p == IPPROTO_ICMP) { 281 struct icmp *icmp; 282 283 icmp = (struct icmp *)fin->fin_dp; 284 285 /* 286 * For ICMP, if the packet is an error packet, also 287 * include the information about the packet which 288 * caused the error. 289 */ 290 switch (icmp->icmp_type) 291 { 292 case ICMP_UNREACH : 293 case ICMP_SOURCEQUENCH : 294 case ICMP_REDIRECT : 295 case ICMP_TIMXCEED : 296 case ICMP_PARAMPROB : 297 hlen += MIN(sizeof(struct icmp) + 8, 298 fin->fin_dlen); 299 break; 300 default : 301 hlen += MIN(sizeof(struct icmp), 302 fin->fin_dlen); 303 break; 304 } 305 } 306 # ifdef USE_INET6 307 else if (p == IPPROTO_ICMPV6) { 308 struct icmp6_hdr *icmp; 309 310 icmp = (struct icmp6_hdr *)fin->fin_dp; 311 312 /* 313 * For ICMPV6, if the packet is an error packet, also 314 * include the information about the packet which 315 * caused the error. 316 */ 317 if (icmp->icmp6_type < 128) { 318 hlen += MIN(sizeof(struct icmp6_hdr) + 8, 319 fin->fin_dlen); 320 } else { 321 hlen += MIN(sizeof(struct icmp6_hdr), 322 fin->fin_dlen); 323 } 324 } 325 # endif 326 } 327 /* 328 * Get the interface number and name to which this packet is 329 * currently associated. 330 */ 331 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) 332 ipfl.fl_unit = (u_int)0; 333 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 334 # else 335 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 336 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \ 337 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) 338 COPYIFNAME(ifp, ipfl.fl_ifname); 339 # else 340 ipfl.fl_unit = (u_int)ifp->if_unit; 341 # if defined(_KERNEL) 342 if ((ipfl.fl_ifname[0] = ifp->if_name[0])) 343 if ((ipfl.fl_ifname[1] = ifp->if_name[1])) 344 if ((ipfl.fl_ifname[2] = ifp->if_name[2])) 345 ipfl.fl_ifname[3] = ifp->if_name[3]; 346 # else 347 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 348 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; 349 # endif 350 # endif 351 # endif /* __hpux || SOLARIS */ 352 mlen = fin->fin_plen - hlen; 353 if (!ipl_logall) { 354 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; 355 } else if ((flags & FR_LOGBODY) == 0) { 356 mlen = 0; 357 } 358 if (mlen < 0) 359 mlen = 0; 360 ipfl.fl_plen = (u_char)mlen; 361 ipfl.fl_hlen = (u_char)hlen; 362 ipfl.fl_rule = fin->fin_rule; 363 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); 364 if (fin->fin_fr != NULL) { 365 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; 366 ipfl.fl_logtag = fin->fin_fr->fr_logtag; 367 } else { 368 ipfl.fl_loglevel = 0xffff; 369 ipfl.fl_logtag = FR_NOLOGTAG; 370 } 371 if (fin->fin_nattag != NULL) 372 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, 373 sizeof(ipfl.fl_nattag)); 374 ipfl.fl_flags = flags; 375 ipfl.fl_dir = fin->fin_out; 376 ipfl.fl_lflags = fin->fin_flx; 377 ptrs[0] = (void *)&ipfl; 378 sizes[0] = sizeof(ipfl); 379 types[0] = 0; 380 # if defined(MENTAT) && defined(_KERNEL) 381 /* 382 * Are we copied from the mblk or an aligned array ? 383 */ 384 if (fin->fin_ip == (ip_t *)m->b_rptr) { 385 ptrs[1] = m; 386 sizes[1] = hlen + mlen; 387 types[1] = 1; 388 } else { 389 ptrs[1] = fin->fin_ip; 390 sizes[1] = hlen + mlen; 391 types[1] = 0; 392 } 393 # else 394 ptrs[1] = m; 395 sizes[1] = hlen + mlen; 396 types[1] = 1; 397 # endif /* MENTAT */ 398 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2); 399 } 400 401 402 /* ------------------------------------------------------------------------ */ 403 /* Function: ipllog */ 404 /* Returns: int - 0 == success, -1 == failure */ 405 /* Parameters: dev(I) - device that owns this log record */ 406 /* fin(I) - pointer to packet information */ 407 /* items(I) - array of pointers to log data */ 408 /* itemsz(I) - array of size of valid memory pointed to */ 409 /* types(I) - type of data pointed to by items pointers */ 410 /* cnt(I) - number of elements in arrays items/itemsz/types */ 411 /* */ 412 /* Takes an array of parameters and constructs one record to include the */ 413 /* miscellaneous packet information, as well as packet data, for reading */ 414 /* from the log device. */ 415 /* ------------------------------------------------------------------------ */ 416 int ipllog(dev, fin, items, itemsz, types, cnt) 417 int dev; 418 fr_info_t *fin; 419 void **items; 420 size_t *itemsz; 421 int *types, cnt; 422 { 423 caddr_t buf, ptr; 424 iplog_t *ipl; 425 size_t len; 426 int i; 427 SPL_INT(s); 428 429 /* 430 * Check to see if this log record has a CRC which matches the last 431 * record logged. If it does, just up the count on the previous one 432 * rather than create a new one. 433 */ 434 if (ipl_suppress) { 435 MUTEX_ENTER(&ipl_mutex); 436 if ((fin != NULL) && (fin->fin_off == 0)) { 437 if ((ipll[dev] != NULL) && 438 bcmp((char *)fin, (char *)&iplcrc[dev], 439 FI_LCSIZE) == 0) { 440 ipll[dev]->ipl_count++; 441 MUTEX_EXIT(&ipl_mutex); 442 return 0; 443 } 444 bcopy((char *)fin, (char *)&iplcrc[dev], FI_LCSIZE); 445 } else 446 bzero((char *)&iplcrc[dev], FI_CSIZE); 447 MUTEX_EXIT(&ipl_mutex); 448 } 449 450 /* 451 * Get the total amount of data to be logged. 452 */ 453 for (i = 0, len = sizeof(iplog_t); i < cnt; i++) 454 len += itemsz[i]; 455 456 /* 457 * check that we have space to record this information and can 458 * allocate that much. 459 */ 460 KMALLOCS(buf, caddr_t, len); 461 if (buf == NULL) 462 return -1; 463 SPL_NET(s); 464 MUTEX_ENTER(&ipl_mutex); 465 if ((iplused[dev] + len) > ipl_logsize) { 466 MUTEX_EXIT(&ipl_mutex); 467 SPL_X(s); 468 KFREES(buf, len); 469 return -1; 470 } 471 iplused[dev] += len; 472 MUTEX_EXIT(&ipl_mutex); 473 SPL_X(s); 474 475 /* 476 * advance the log pointer to the next empty record and deduct the 477 * amount of space we're going to use. 478 */ 479 ipl = (iplog_t *)buf; 480 ipl->ipl_magic = ipl_magic[dev]; 481 ipl->ipl_count = 1; 482 ipl->ipl_next = NULL; 483 ipl->ipl_dsize = len; 484 #ifdef _KERNEL 485 GETKTIME(&ipl->ipl_sec); 486 #else 487 ipl->ipl_sec = 0; 488 ipl->ipl_usec = 0; 489 #endif 490 491 /* 492 * Loop through all the items to be logged, copying each one to the 493 * buffer. Use bcopy for normal data or the mb_t copyout routine. 494 */ 495 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { 496 if (types[i] == 0) { 497 bcopy(items[i], ptr, itemsz[i]); 498 } else if (types[i] == 1) { 499 COPYDATA(items[i], 0, itemsz[i], ptr); 500 } 501 ptr += itemsz[i]; 502 } 503 SPL_NET(s); 504 MUTEX_ENTER(&ipl_mutex); 505 ipll[dev] = ipl; 506 *iplh[dev] = ipl; 507 iplh[dev] = &ipl->ipl_next; 508 509 /* 510 * Now that the log record has been completed and added to the queue, 511 * wake up any listeners who may want to read it. 512 */ 513 # if SOLARIS && defined(_KERNEL) 514 cv_signal(&iplwait); 515 MUTEX_EXIT(&ipl_mutex); 516 # else 517 MUTEX_EXIT(&ipl_mutex); 518 WAKEUP(iplh,dev); 519 # endif 520 SPL_X(s); 521 # ifdef IPL_SELECT 522 iplog_input_ready(dev); 523 # endif 524 return 0; 525 } 526 527 528 /* ------------------------------------------------------------------------ */ 529 /* Function: ipflog_read */ 530 /* Returns: int - 0 == success, else error value. */ 531 /* Parameters: unit(I) - device we are reading from */ 532 /* uio(O) - pointer to information about where to store data */ 533 /* */ 534 /* Called to handle a read on an IPFilter device. Returns only complete */ 535 /* log messages - will not partially copy a log record out to userland. */ 536 /* */ 537 /* NOTE: This function will block and wait for a signal to return data if */ 538 /* there is none present. Asynchronous I/O is not implemented. */ 539 /* ------------------------------------------------------------------------ */ 540 int ipflog_read(unit, uio) 541 minor_t unit; 542 struct uio *uio; 543 { 544 size_t dlen, copied; 545 int error = 0; 546 iplog_t *ipl; 547 SPL_INT(s); 548 549 /* 550 * Sanity checks. Make sure the minor # is valid and we're copying 551 * a valid chunk of data. 552 */ 553 if (IPL_LOGMAX < unit) 554 return ENXIO; 555 if (uio->uio_resid == 0) 556 return 0; 557 if ((uio->uio_resid < sizeof(iplog_t)) || 558 (uio->uio_resid > ipl_logsize)) 559 return EINVAL; 560 561 /* 562 * Lock the log so we can snapshot the variables. Wait for a signal 563 * if the log is empty. 564 */ 565 SPL_NET(s); 566 MUTEX_ENTER(&ipl_mutex); 567 568 while (iplt[unit] == NULL) { 569 # if SOLARIS && defined(_KERNEL) 570 if (!cv_wait_sig(&iplwait, &ipl_mutex.ipf_lk)) { 571 MUTEX_EXIT(&ipl_mutex); 572 return EINTR; 573 } 574 # else 575 # if defined(__hpux) && defined(_KERNEL) 576 lock_t *l; 577 578 # ifdef IPL_SELECT 579 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { 580 /* this is no blocking system call */ 581 MUTEX_EXIT(&ipl_mutex); 582 return 0; 583 } 584 # endif 585 586 MUTEX_EXIT(&ipl_mutex); 587 l = get_sleep_lock(&iplh[unit]); 588 error = sleep(&iplh[unit], PZERO+1); 589 spinunlock(l); 590 # else 591 # if defined(__osf__) && defined(_KERNEL) 592 error = mpsleep(&iplh[unit], PSUSP|PCATCH, "iplread", 0, 593 &ipl_mutex, MS_LOCK_SIMPLE); 594 # else 595 MUTEX_EXIT(&ipl_mutex); 596 SPL_X(s); 597 error = SLEEP(unit + iplh, "ipl sleep"); 598 # endif /* __osf__ */ 599 # endif /* __hpux */ 600 if (error) 601 return error; 602 SPL_NET(s); 603 MUTEX_ENTER(&ipl_mutex); 604 # endif /* SOLARIS */ 605 } 606 607 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__) 608 uio->uio_rw = UIO_READ; 609 # endif 610 611 for (copied = 0; (ipl = iplt[unit]) != NULL; copied += dlen) { 612 dlen = ipl->ipl_dsize; 613 if (dlen > uio->uio_resid) 614 break; 615 /* 616 * Don't hold the mutex over the uiomove call. 617 */ 618 iplt[unit] = ipl->ipl_next; 619 iplused[unit] -= dlen; 620 MUTEX_EXIT(&ipl_mutex); 621 SPL_X(s); 622 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio); 623 if (error) { 624 SPL_NET(s); 625 MUTEX_ENTER(&ipl_mutex); 626 ipl->ipl_next = iplt[unit]; 627 iplt[unit] = ipl; 628 iplused[unit] += dlen; 629 break; 630 } 631 MUTEX_ENTER(&ipl_mutex); 632 KFREES((caddr_t)ipl, dlen); 633 SPL_NET(s); 634 } 635 if (!iplt[unit]) { 636 iplused[unit] = 0; 637 iplh[unit] = &iplt[unit]; 638 ipll[unit] = NULL; 639 } 640 641 MUTEX_EXIT(&ipl_mutex); 642 SPL_X(s); 643 return error; 644 } 645 646 647 /* ------------------------------------------------------------------------ */ 648 /* Function: ipflog_clear */ 649 /* Returns: int - number of log bytes cleared. */ 650 /* Parameters: unit(I) - device we are reading from */ 651 /* */ 652 /* Deletes all queued up log records for a given output device. */ 653 /* ------------------------------------------------------------------------ */ 654 int ipflog_clear(unit) 655 minor_t unit; 656 { 657 iplog_t *ipl; 658 int used; 659 SPL_INT(s); 660 661 SPL_NET(s); 662 MUTEX_ENTER(&ipl_mutex); 663 while ((ipl = iplt[unit]) != NULL) { 664 iplt[unit] = ipl->ipl_next; 665 KFREES((caddr_t)ipl, ipl->ipl_dsize); 666 } 667 iplh[unit] = &iplt[unit]; 668 ipll[unit] = NULL; 669 used = iplused[unit]; 670 iplused[unit] = 0; 671 bzero((char *)&iplcrc[unit], FI_CSIZE); 672 MUTEX_EXIT(&ipl_mutex); 673 SPL_X(s); 674 return used; 675 } 676 #endif /* IPFILTER_LOG */ 677