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(_KERNEL) 258 net_data_t nif; 259 void *ifp; 260 # else 261 # if defined(__hpux) && defined(_KERNEL) 262 qif_t *ifp; 263 # else 264 struct ifnet *ifp; 265 # endif 266 # endif /* SOLARIS */ 267 268 ipfl.fl_nattag.ipt_num[0] = 0; 269 m = fin->fin_m; 270 ifp = fin->fin_ifp; 271 hlen = fin->fin_hlen; 272 /* 273 * calculate header size. 274 */ 275 if (fin->fin_off == 0) { 276 p = fin->fin_fi.fi_p; 277 if (p == IPPROTO_TCP) 278 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); 279 else if (p == IPPROTO_UDP) 280 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); 281 else if (p == IPPROTO_ICMP) { 282 struct icmp *icmp; 283 284 icmp = (struct icmp *)fin->fin_dp; 285 286 /* 287 * For ICMP, if the packet is an error packet, also 288 * include the information about the packet which 289 * caused the error. 290 */ 291 switch (icmp->icmp_type) 292 { 293 case ICMP_UNREACH : 294 case ICMP_SOURCEQUENCH : 295 case ICMP_REDIRECT : 296 case ICMP_TIMXCEED : 297 case ICMP_PARAMPROB : 298 hlen += MIN(sizeof(struct icmp) + 8, 299 fin->fin_dlen); 300 break; 301 default : 302 hlen += MIN(sizeof(struct icmp), 303 fin->fin_dlen); 304 break; 305 } 306 } 307 # ifdef USE_INET6 308 else if (p == IPPROTO_ICMPV6) { 309 struct icmp6_hdr *icmp; 310 311 icmp = (struct icmp6_hdr *)fin->fin_dp; 312 313 /* 314 * For ICMPV6, if the packet is an error packet, also 315 * include the information about the packet which 316 * caused the error. 317 */ 318 if (icmp->icmp6_type < 128) { 319 hlen += MIN(sizeof(struct icmp6_hdr) + 8, 320 fin->fin_dlen); 321 } else { 322 hlen += MIN(sizeof(struct icmp6_hdr), 323 fin->fin_dlen); 324 } 325 } 326 # endif 327 } 328 /* 329 * Get the interface number and name to which this packet is 330 * currently associated. 331 */ 332 # if SOLARIS && defined(_KERNEL) 333 ipfl.fl_unit = (u_int)0; 334 nif = NULL; 335 if (fin->fin_fi.fi_v == 4) 336 nif = ipf_ipv4; 337 else if (fin->fin_fi.fi_v == 6) 338 nif = ipf_ipv6; 339 if (nif != NULL) { 340 if (net_getifname(nif, (phy_if_t)ifp, 341 ipfl.fl_ifname, sizeof(ipfl.fl_ifname)) != 0) 342 return (-1); 343 } 344 345 # else 346 # if defined(__hpux) && defined(_KERNEL) 347 ipfl.fl_unit = (u_int)0; 348 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 349 # else 350 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 351 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \ 352 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) 353 COPYIFNAME(ifp, ipfl.fl_ifname); 354 # else 355 ipfl.fl_unit = (u_int)ifp->if_unit; 356 # if defined(_KERNEL) 357 if ((ipfl.fl_ifname[0] = ifp->if_name[0])) 358 if ((ipfl.fl_ifname[1] = ifp->if_name[1])) 359 if ((ipfl.fl_ifname[2] = ifp->if_name[2])) 360 ipfl.fl_ifname[3] = ifp->if_name[3]; 361 # else 362 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 363 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; 364 # endif 365 # endif 366 # endif /* __hpux */ 367 # endif /* SOLARIS */ 368 mlen = fin->fin_plen - hlen; 369 if (!ipl_logall) { 370 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; 371 } else if ((flags & FR_LOGBODY) == 0) { 372 mlen = 0; 373 } 374 if (mlen < 0) 375 mlen = 0; 376 ipfl.fl_plen = (u_char)mlen; 377 ipfl.fl_hlen = (u_char)hlen; 378 ipfl.fl_rule = fin->fin_rule; 379 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); 380 if (fin->fin_fr != NULL) { 381 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; 382 ipfl.fl_logtag = fin->fin_fr->fr_logtag; 383 } else { 384 ipfl.fl_loglevel = 0xffff; 385 ipfl.fl_logtag = FR_NOLOGTAG; 386 } 387 if (fin->fin_nattag != NULL) 388 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, 389 sizeof(ipfl.fl_nattag)); 390 ipfl.fl_flags = flags; 391 ipfl.fl_dir = fin->fin_out; 392 ipfl.fl_lflags = fin->fin_flx; 393 ptrs[0] = (void *)&ipfl; 394 sizes[0] = sizeof(ipfl); 395 types[0] = 0; 396 # if defined(MENTAT) && defined(_KERNEL) 397 /* 398 * Are we copied from the mblk or an aligned array ? 399 */ 400 if (fin->fin_ip == (ip_t *)m->b_rptr) { 401 ptrs[1] = m; 402 sizes[1] = hlen + mlen; 403 types[1] = 1; 404 } else { 405 ptrs[1] = fin->fin_ip; 406 sizes[1] = hlen + mlen; 407 types[1] = 0; 408 } 409 # else 410 ptrs[1] = m; 411 sizes[1] = hlen + mlen; 412 types[1] = 1; 413 # endif /* MENTAT */ 414 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2); 415 } 416 417 418 /* ------------------------------------------------------------------------ */ 419 /* Function: ipllog */ 420 /* Returns: int - 0 == success, -1 == failure */ 421 /* Parameters: dev(I) - device that owns this log record */ 422 /* fin(I) - pointer to packet information */ 423 /* items(I) - array of pointers to log data */ 424 /* itemsz(I) - array of size of valid memory pointed to */ 425 /* types(I) - type of data pointed to by items pointers */ 426 /* cnt(I) - number of elements in arrays items/itemsz/types */ 427 /* */ 428 /* Takes an array of parameters and constructs one record to include the */ 429 /* miscellaneous packet information, as well as packet data, for reading */ 430 /* from the log device. */ 431 /* ------------------------------------------------------------------------ */ 432 int ipllog(dev, fin, items, itemsz, types, cnt) 433 int dev; 434 fr_info_t *fin; 435 void **items; 436 size_t *itemsz; 437 int *types, cnt; 438 { 439 caddr_t buf, ptr; 440 iplog_t *ipl; 441 size_t len; 442 int i; 443 SPL_INT(s); 444 445 /* 446 * Check to see if this log record has a CRC which matches the last 447 * record logged. If it does, just up the count on the previous one 448 * rather than create a new one. 449 */ 450 if (ipl_suppress) { 451 MUTEX_ENTER(&ipl_mutex); 452 if ((fin != NULL) && (fin->fin_off == 0)) { 453 if ((ipll[dev] != NULL) && 454 bcmp((char *)fin, (char *)&iplcrc[dev], 455 FI_LCSIZE) == 0) { 456 ipll[dev]->ipl_count++; 457 MUTEX_EXIT(&ipl_mutex); 458 return 0; 459 } 460 bcopy((char *)fin, (char *)&iplcrc[dev], FI_LCSIZE); 461 } else 462 bzero((char *)&iplcrc[dev], FI_CSIZE); 463 MUTEX_EXIT(&ipl_mutex); 464 } 465 466 /* 467 * Get the total amount of data to be logged. 468 */ 469 for (i = 0, len = sizeof(iplog_t); i < cnt; i++) 470 len += itemsz[i]; 471 472 /* 473 * check that we have space to record this information and can 474 * allocate that much. 475 */ 476 KMALLOCS(buf, caddr_t, len); 477 if (buf == NULL) 478 return -1; 479 SPL_NET(s); 480 MUTEX_ENTER(&ipl_mutex); 481 if ((iplused[dev] + len) > ipl_logsize) { 482 MUTEX_EXIT(&ipl_mutex); 483 SPL_X(s); 484 KFREES(buf, len); 485 return -1; 486 } 487 iplused[dev] += len; 488 MUTEX_EXIT(&ipl_mutex); 489 SPL_X(s); 490 491 /* 492 * advance the log pointer to the next empty record and deduct the 493 * amount of space we're going to use. 494 */ 495 ipl = (iplog_t *)buf; 496 ipl->ipl_magic = ipl_magic[dev]; 497 ipl->ipl_count = 1; 498 ipl->ipl_next = NULL; 499 ipl->ipl_dsize = len; 500 #ifdef _KERNEL 501 GETKTIME(&ipl->ipl_sec); 502 #else 503 ipl->ipl_sec = 0; 504 ipl->ipl_usec = 0; 505 #endif 506 507 /* 508 * Loop through all the items to be logged, copying each one to the 509 * buffer. Use bcopy for normal data or the mb_t copyout routine. 510 */ 511 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { 512 if (types[i] == 0) { 513 bcopy(items[i], ptr, itemsz[i]); 514 } else if (types[i] == 1) { 515 COPYDATA(items[i], 0, itemsz[i], ptr); 516 } 517 ptr += itemsz[i]; 518 } 519 SPL_NET(s); 520 MUTEX_ENTER(&ipl_mutex); 521 ipll[dev] = ipl; 522 *iplh[dev] = ipl; 523 iplh[dev] = &ipl->ipl_next; 524 525 /* 526 * Now that the log record has been completed and added to the queue, 527 * wake up any listeners who may want to read it. 528 */ 529 # if SOLARIS && defined(_KERNEL) 530 cv_signal(&iplwait); 531 MUTEX_EXIT(&ipl_mutex); 532 # else 533 MUTEX_EXIT(&ipl_mutex); 534 WAKEUP(iplh,dev); 535 # endif 536 SPL_X(s); 537 # ifdef IPL_SELECT 538 iplog_input_ready(dev); 539 # endif 540 return 0; 541 } 542 543 544 /* ------------------------------------------------------------------------ */ 545 /* Function: ipflog_read */ 546 /* Returns: int - 0 == success, else error value. */ 547 /* Parameters: unit(I) - device we are reading from */ 548 /* uio(O) - pointer to information about where to store data */ 549 /* */ 550 /* Called to handle a read on an IPFilter device. Returns only complete */ 551 /* log messages - will not partially copy a log record out to userland. */ 552 /* */ 553 /* NOTE: This function will block and wait for a signal to return data if */ 554 /* there is none present. Asynchronous I/O is not implemented. */ 555 /* ------------------------------------------------------------------------ */ 556 int ipflog_read(unit, uio) 557 minor_t unit; 558 struct uio *uio; 559 { 560 size_t dlen, copied; 561 int error = 0; 562 iplog_t *ipl; 563 SPL_INT(s); 564 565 /* 566 * Sanity checks. Make sure the minor # is valid and we're copying 567 * a valid chunk of data. 568 */ 569 if (IPL_LOGMAX < unit) 570 return ENXIO; 571 if (uio->uio_resid == 0) 572 return 0; 573 if ((uio->uio_resid < sizeof(iplog_t)) || 574 (uio->uio_resid > ipl_logsize)) 575 return EINVAL; 576 577 /* 578 * Lock the log so we can snapshot the variables. Wait for a signal 579 * if the log is empty. 580 */ 581 SPL_NET(s); 582 MUTEX_ENTER(&ipl_mutex); 583 584 while (iplt[unit] == NULL) { 585 # if SOLARIS && defined(_KERNEL) 586 if (!cv_wait_sig(&iplwait, &ipl_mutex.ipf_lk)) { 587 MUTEX_EXIT(&ipl_mutex); 588 return EINTR; 589 } 590 # else 591 # if defined(__hpux) && defined(_KERNEL) 592 lock_t *l; 593 594 # ifdef IPL_SELECT 595 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { 596 /* this is no blocking system call */ 597 MUTEX_EXIT(&ipl_mutex); 598 return 0; 599 } 600 # endif 601 602 MUTEX_EXIT(&ipl_mutex); 603 l = get_sleep_lock(&iplh[unit]); 604 error = sleep(&iplh[unit], PZERO+1); 605 spinunlock(l); 606 # else 607 # if defined(__osf__) && defined(_KERNEL) 608 error = mpsleep(&iplh[unit], PSUSP|PCATCH, "iplread", 0, 609 &ipl_mutex, MS_LOCK_SIMPLE); 610 # else 611 MUTEX_EXIT(&ipl_mutex); 612 SPL_X(s); 613 error = SLEEP(unit + iplh, "ipl sleep"); 614 # endif /* __osf__ */ 615 # endif /* __hpux */ 616 if (error) 617 return error; 618 SPL_NET(s); 619 MUTEX_ENTER(&ipl_mutex); 620 # endif /* SOLARIS */ 621 } 622 623 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__) 624 uio->uio_rw = UIO_READ; 625 # endif 626 627 for (copied = 0; (ipl = iplt[unit]) != NULL; copied += dlen) { 628 dlen = ipl->ipl_dsize; 629 if (dlen > uio->uio_resid) 630 break; 631 /* 632 * Don't hold the mutex over the uiomove call. 633 */ 634 iplt[unit] = ipl->ipl_next; 635 iplused[unit] -= dlen; 636 if (iplt[unit] == NULL) { 637 iplh[unit] = &iplt[unit]; 638 ipll[unit] = NULL; 639 } 640 MUTEX_EXIT(&ipl_mutex); 641 SPL_X(s); 642 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio); 643 if (error) { 644 SPL_NET(s); 645 MUTEX_ENTER(&ipl_mutex); 646 iplused[unit] += dlen; 647 ipl->ipl_next = iplt[unit]; 648 iplt[unit] = ipl; 649 ipll[unit] = ipl; 650 if (iplh[unit] == &iplt[unit]) { 651 *iplh[unit] = ipl; 652 iplh[unit] = &ipl->ipl_next; 653 } 654 break; 655 } 656 MUTEX_ENTER(&ipl_mutex); 657 KFREES((caddr_t)ipl, dlen); 658 SPL_NET(s); 659 } 660 661 MUTEX_EXIT(&ipl_mutex); 662 SPL_X(s); 663 return error; 664 } 665 666 667 /* ------------------------------------------------------------------------ */ 668 /* Function: ipflog_clear */ 669 /* Returns: int - number of log bytes cleared. */ 670 /* Parameters: unit(I) - device we are reading from */ 671 /* */ 672 /* Deletes all queued up log records for a given output device. */ 673 /* ------------------------------------------------------------------------ */ 674 int ipflog_clear(unit) 675 minor_t unit; 676 { 677 iplog_t *ipl; 678 int used; 679 SPL_INT(s); 680 681 SPL_NET(s); 682 MUTEX_ENTER(&ipl_mutex); 683 while ((ipl = iplt[unit]) != NULL) { 684 iplt[unit] = ipl->ipl_next; 685 KFREES((caddr_t)ipl, ipl->ipl_dsize); 686 } 687 iplh[unit] = &iplt[unit]; 688 ipll[unit] = NULL; 689 used = iplused[unit]; 690 iplused[unit] = 0; 691 bzero((char *)&iplcrc[unit], FI_CSIZE); 692 MUTEX_EXIT(&ipl_mutex); 693 SPL_X(s); 694 return used; 695 } 696 #endif /* IPFILTER_LOG */ 697