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 2007 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 #include "netinet/ipf_stack.h" 133 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__) 134 # include <sys/malloc.h> 135 #endif 136 /* END OF INCLUDES */ 137 138 #ifdef IPFILTER_LOG 139 140 # if defined(IPL_SELECT) 141 # include <machine/sys/user.h> 142 # include <sys/kthread_iface.h> 143 # define READ_COLLISION 0x001 144 145 iplog_select_t iplog_ss[IPL_LOGMAX+1]; 146 147 extern int selwait; 148 # endif /* IPL_SELECT */ 149 150 /* ipl_magic never changes */ 151 int ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE, 152 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, 153 IPL_MAGIC, IPL_MAGIC }; 154 155 /* ------------------------------------------------------------------------ */ 156 /* Function: fr_loginit */ 157 /* Returns: int - 0 == success (always returned) */ 158 /* Parameters: Nil */ 159 /* */ 160 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ 161 /* secret for use in calculating the "last log checksum". */ 162 /* ------------------------------------------------------------------------ */ 163 int fr_loginit(ifs) 164 ipf_stack_t *ifs; 165 { 166 int i; 167 168 ifs->ifs_ipl_suppress = 1; 169 ifs->ifs_ipl_logmax = IPL_LOGMAX; 170 ifs->ifs_ipl_logsize = IPFILTER_LOGSIZE; 171 for (i = IPL_LOGMAX; i >= 0; i--) { 172 ifs->ifs_iplt[i] = NULL; 173 ifs->ifs_ipll[i] = NULL; 174 ifs->ifs_iplh[i] = &ifs->ifs_iplt[i]; 175 ifs->ifs_iplused[i] = 0; 176 bzero((char *)&ifs->ifs_iplcrc[i], sizeof(ifs->ifs_iplcrc[i])); 177 # ifdef IPL_SELECT 178 iplog_ss[i].read_waiter = 0; 179 iplog_ss[i].state = 0; 180 # endif 181 # if defined(linux) && defined(_KERNEL) 182 init_waitqueue_head(iplh_linux + i); 183 # endif 184 } 185 186 # if SOLARIS && defined(_KERNEL) 187 cv_init(&ifs->ifs_iplwait, "ipl condvar", CV_DRIVER, NULL); 188 # endif 189 MUTEX_INIT(&ifs->ifs_ipl_mutex, "ipf log mutex"); 190 191 ifs->ifs_ipl_log_init = 1; 192 193 return 0; 194 } 195 196 197 /* ------------------------------------------------------------------------ */ 198 /* Function: fr_logunload */ 199 /* Returns: Nil */ 200 /* Parameters: Nil */ 201 /* */ 202 /* Clean up any log data that has accumulated without being read. */ 203 /* ------------------------------------------------------------------------ */ 204 void fr_logunload(ifs) 205 ipf_stack_t *ifs; 206 { 207 int i; 208 209 if (ifs->ifs_ipl_log_init == 0) 210 return; 211 212 for (i = IPL_LOGMAX; i >= 0; i--) 213 (void) ipflog_clear(i, ifs); 214 215 # if SOLARIS && defined(_KERNEL) 216 cv_destroy(&ifs->ifs_iplwait); 217 # endif 218 MUTEX_DESTROY(&ifs->ifs_ipl_mutex); 219 220 ifs->ifs_ipl_log_init = 0; 221 } 222 223 224 /* ------------------------------------------------------------------------ */ 225 /* Function: ipflog */ 226 /* Returns: int - 0 == success, -1 == failure */ 227 /* Parameters: fin(I) - pointer to packet information */ 228 /* flags(I) - flags from filter rules */ 229 /* */ 230 /* Create a log record for a packet given that it has been triggered by a */ 231 /* rule (or the default setting). Calculate the transport protocol header */ 232 /* size using predetermined size of a couple of popular protocols and thus */ 233 /* how much data to copy into the log, including part of the data body if */ 234 /* requested. */ 235 /* ------------------------------------------------------------------------ */ 236 int ipflog(fin, flags) 237 fr_info_t *fin; 238 u_int flags; 239 { 240 register size_t hlen; 241 int types[2], mlen; 242 size_t sizes[2]; 243 void *ptrs[2]; 244 ipflog_t ipfl; 245 u_char p; 246 mb_t *m; 247 # if SOLARIS && defined(_KERNEL) 248 net_data_t nif; 249 void *ifp; 250 # else 251 # if defined(__hpux) && defined(_KERNEL) 252 qif_t *ifp; 253 # else 254 struct ifnet *ifp; 255 # endif 256 # endif /* SOLARIS */ 257 ipf_stack_t *ifs = fin->fin_ifs; 258 259 ipfl.fl_nattag.ipt_num[0] = 0; 260 m = fin->fin_m; 261 ifp = fin->fin_ifp; 262 hlen = fin->fin_hlen; 263 /* 264 * calculate header size. 265 */ 266 if (fin->fin_off == 0) { 267 p = fin->fin_fi.fi_p; 268 if (p == IPPROTO_TCP) 269 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); 270 else if (p == IPPROTO_UDP) 271 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); 272 else if (p == IPPROTO_ICMP) { 273 struct icmp *icmp; 274 275 icmp = (struct icmp *)fin->fin_dp; 276 277 /* 278 * For ICMP, if the packet is an error packet, also 279 * include the information about the packet which 280 * caused the error. 281 */ 282 switch (icmp->icmp_type) 283 { 284 case ICMP_UNREACH : 285 case ICMP_SOURCEQUENCH : 286 case ICMP_REDIRECT : 287 case ICMP_TIMXCEED : 288 case ICMP_PARAMPROB : 289 hlen += MIN(sizeof(struct icmp) + 8, 290 fin->fin_dlen); 291 break; 292 default : 293 hlen += MIN(sizeof(struct icmp), 294 fin->fin_dlen); 295 break; 296 } 297 } 298 # ifdef USE_INET6 299 else if (p == IPPROTO_ICMPV6) { 300 struct icmp6_hdr *icmp; 301 302 icmp = (struct icmp6_hdr *)fin->fin_dp; 303 304 /* 305 * For ICMPV6, if the packet is an error packet, also 306 * include the information about the packet which 307 * caused the error. 308 */ 309 if (icmp->icmp6_type < 128) { 310 hlen += MIN(sizeof(struct icmp6_hdr) + 8, 311 fin->fin_dlen); 312 } else { 313 hlen += MIN(sizeof(struct icmp6_hdr), 314 fin->fin_dlen); 315 } 316 } 317 # endif 318 } 319 /* 320 * Get the interface number and name to which this packet is 321 * currently associated. 322 */ 323 # if SOLARIS && defined(_KERNEL) 324 ipfl.fl_unit = (u_int)0; 325 nif = NULL; 326 if (fin->fin_fi.fi_v == 4) 327 nif = ifs->ifs_ipf_ipv4; 328 else if (fin->fin_fi.fi_v == 6) 329 nif = ifs->ifs_ipf_ipv6; 330 if (nif != NULL) { 331 if (net_getifname(nif, (phy_if_t)ifp, 332 ipfl.fl_ifname, sizeof(ipfl.fl_ifname)) != 0) 333 return (-1); 334 } 335 336 # else 337 # if defined(__hpux) && defined(_KERNEL) 338 ipfl.fl_unit = (u_int)0; 339 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 340 # else 341 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 342 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \ 343 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) 344 COPYIFNAME(ifp, ipfl.fl_ifname); 345 # else 346 ipfl.fl_unit = (u_int)ifp->if_unit; 347 # if defined(_KERNEL) 348 if ((ipfl.fl_ifname[0] = ifp->if_name[0])) 349 if ((ipfl.fl_ifname[1] = ifp->if_name[1])) 350 if ((ipfl.fl_ifname[2] = ifp->if_name[2])) 351 ipfl.fl_ifname[3] = ifp->if_name[3]; 352 # else 353 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 354 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; 355 # endif 356 # endif 357 # endif /* __hpux */ 358 # endif /* SOLARIS */ 359 mlen = fin->fin_plen - hlen; 360 if (!ifs->ifs_ipl_logall) { 361 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; 362 } else if ((flags & FR_LOGBODY) == 0) { 363 mlen = 0; 364 } 365 if (mlen < 0) 366 mlen = 0; 367 ipfl.fl_plen = (u_char)mlen; 368 ipfl.fl_hlen = (u_char)hlen; 369 ipfl.fl_rule = fin->fin_rule; 370 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); 371 if (fin->fin_fr != NULL) { 372 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; 373 ipfl.fl_logtag = fin->fin_fr->fr_logtag; 374 } else { 375 ipfl.fl_loglevel = 0xffff; 376 ipfl.fl_logtag = FR_NOLOGTAG; 377 } 378 if (fin->fin_nattag != NULL) 379 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, 380 sizeof(ipfl.fl_nattag)); 381 ipfl.fl_flags = flags; 382 ipfl.fl_dir = fin->fin_out; 383 ipfl.fl_lflags = fin->fin_flx; 384 ptrs[0] = (void *)&ipfl; 385 sizes[0] = sizeof(ipfl); 386 types[0] = 0; 387 # if defined(MENTAT) && defined(_KERNEL) 388 /* 389 * Are we copied from the mblk or an aligned array ? 390 */ 391 if (fin->fin_ip == (ip_t *)m->b_rptr) { 392 ptrs[1] = m; 393 sizes[1] = hlen + mlen; 394 types[1] = 1; 395 } else { 396 ptrs[1] = fin->fin_ip; 397 sizes[1] = hlen + mlen; 398 types[1] = 0; 399 } 400 # else 401 ptrs[1] = m; 402 sizes[1] = hlen + mlen; 403 types[1] = 1; 404 # endif /* MENTAT */ 405 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2, fin->fin_ifs); 406 } 407 408 409 /* ------------------------------------------------------------------------ */ 410 /* Function: ipllog */ 411 /* Returns: int - 0 == success, -1 == failure */ 412 /* Parameters: dev(I) - device that owns this log record */ 413 /* fin(I) - pointer to packet information */ 414 /* items(I) - array of pointers to log data */ 415 /* itemsz(I) - array of size of valid memory pointed to */ 416 /* types(I) - type of data pointed to by items pointers */ 417 /* cnt(I) - number of elements in arrays items/itemsz/types */ 418 /* */ 419 /* Takes an array of parameters and constructs one record to include the */ 420 /* miscellaneous packet information, as well as packet data, for reading */ 421 /* from the log device. */ 422 /* ------------------------------------------------------------------------ */ 423 int ipllog(dev, fin, items, itemsz, types, cnt, ifs) 424 int dev; 425 fr_info_t *fin; 426 void **items; 427 size_t *itemsz; 428 int *types, cnt; 429 ipf_stack_t *ifs; 430 { 431 caddr_t buf, ptr; 432 iplog_t *ipl; 433 size_t len; 434 int i; 435 SPL_INT(s); 436 437 /* 438 * Check to see if this log record has a CRC which matches the last 439 * record logged. If it does, just up the count on the previous one 440 * rather than create a new one. 441 */ 442 if (ifs->ifs_ipl_suppress) { 443 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 444 if ((fin != NULL) && (fin->fin_off == 0)) { 445 if ((ifs->ifs_ipll[dev] != NULL) && 446 bcmp((char *)fin, (char *)&ifs->ifs_iplcrc[dev], 447 FI_LCSIZE) == 0) { 448 ifs->ifs_ipll[dev]->ipl_count++; 449 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 450 return 0; 451 } 452 bcopy((char *)fin, (char *)&ifs->ifs_iplcrc[dev], 453 FI_LCSIZE); 454 } else 455 bzero((char *)&ifs->ifs_iplcrc[dev], FI_CSIZE); 456 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 457 } 458 459 /* 460 * Get the total amount of data to be logged. 461 */ 462 for (i = 0, len = sizeof(iplog_t); i < cnt; i++) 463 len += itemsz[i]; 464 465 /* 466 * check that we have space to record this information and can 467 * allocate that much. 468 */ 469 KMALLOCS(buf, caddr_t, len); 470 if (buf == NULL) 471 return -1; 472 SPL_NET(s); 473 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 474 if ((ifs->ifs_iplused[dev] + len) > IPFILTER_LOGSIZE) { 475 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 476 SPL_X(s); 477 KFREES(buf, len); 478 return -1; 479 } 480 ifs->ifs_iplused[dev] += len; 481 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 482 SPL_X(s); 483 484 /* 485 * advance the log pointer to the next empty record and deduct the 486 * amount of space we're going to use. 487 */ 488 ipl = (iplog_t *)buf; 489 ipl->ipl_magic = ipl_magic[dev]; 490 ipl->ipl_count = 1; 491 ipl->ipl_next = NULL; 492 ipl->ipl_dsize = len; 493 #ifdef _KERNEL 494 GETKTIME(&ipl->ipl_sec); 495 #else 496 ipl->ipl_sec = 0; 497 ipl->ipl_usec = 0; 498 #endif 499 500 /* 501 * Loop through all the items to be logged, copying each one to the 502 * buffer. Use bcopy for normal data or the mb_t copyout routine. 503 */ 504 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { 505 if (types[i] == 0) { 506 bcopy(items[i], ptr, itemsz[i]); 507 } else if (types[i] == 1) { 508 COPYDATA(items[i], 0, itemsz[i], ptr); 509 } 510 ptr += itemsz[i]; 511 } 512 SPL_NET(s); 513 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 514 ifs->ifs_ipll[dev] = ipl; 515 *ifs->ifs_iplh[dev] = ipl; 516 ifs->ifs_iplh[dev] = &ipl->ipl_next; 517 518 /* 519 * Now that the log record has been completed and added to the queue, 520 * wake up any listeners who may want to read it. 521 */ 522 # if SOLARIS && defined(_KERNEL) 523 cv_signal(&ifs->ifs_iplwait); 524 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 525 # else 526 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 527 WAKEUP(&ifs->ifs_iplh, dev); 528 # endif 529 SPL_X(s); 530 # ifdef IPL_SELECT 531 iplog_input_ready(dev); 532 # endif 533 return 0; 534 } 535 536 537 /* ------------------------------------------------------------------------ */ 538 /* Function: ipflog_read */ 539 /* Returns: int - 0 == success, else error value. */ 540 /* Parameters: unit(I) - device we are reading from */ 541 /* uio(O) - pointer to information about where to store data */ 542 /* */ 543 /* Called to handle a read on an IPFilter device. Returns only complete */ 544 /* log messages - will not partially copy a log record out to userland. */ 545 /* */ 546 /* NOTE: This function will block and wait for a signal to return data if */ 547 /* there is none present. Asynchronous I/O is not implemented. */ 548 /* ------------------------------------------------------------------------ */ 549 int ipflog_read(unit, uio, ifs) 550 minor_t unit; 551 struct uio *uio; 552 ipf_stack_t *ifs; 553 { 554 size_t dlen, copied; 555 int error = 0; 556 iplog_t *ipl; 557 SPL_INT(s); 558 559 /* 560 * Sanity checks. Make sure the minor # is valid and we're copying 561 * a valid chunk of data. 562 */ 563 if (IPL_LOGMAX < unit) 564 return ENXIO; 565 if (uio->uio_resid == 0) 566 return 0; 567 if ((uio->uio_resid < sizeof(iplog_t)) || 568 (uio->uio_resid > ifs->ifs_ipl_logsize)) 569 return EINVAL; 570 571 /* 572 * Lock the log so we can snapshot the variables. Wait for a signal 573 * if the log is empty. 574 */ 575 SPL_NET(s); 576 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 577 578 while (ifs->ifs_iplt[unit] == NULL) { 579 # if SOLARIS && defined(_KERNEL) 580 if (!cv_wait_sig(&ifs->ifs_iplwait, &ifs->ifs_ipl_mutex.ipf_lk)) { 581 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 582 return EINTR; 583 } 584 # else 585 # if defined(__hpux) && defined(_KERNEL) 586 lock_t *l; 587 588 # ifdef IPL_SELECT 589 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { 590 /* this is no blocking system call */ 591 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 592 return 0; 593 } 594 # endif 595 596 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 597 l = get_sleep_lock(&ifs->ifs_iplh[unit]); 598 error = sleep(&ifs->ifs_iplh[unit], PZERO+1); 599 spinunlock(l); 600 # else 601 # if defined(__osf__) && defined(_KERNEL) 602 error = mpsleep(&ifs->ifs_iplh[unit], PSUSP|PCATCH, "iplread", 0, 603 &ifs->ifs_ipl_mutex, MS_LOCK_SIMPLE); 604 # else 605 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 606 SPL_X(s); 607 error = SLEEP(&ifs->ifs_iplh[unit], "ipl sleep"); 608 # endif /* __osf__ */ 609 # endif /* __hpux */ 610 if (error) 611 return error; 612 SPL_NET(s); 613 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 614 # endif /* SOLARIS */ 615 } 616 617 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__) 618 uio->uio_rw = UIO_READ; 619 # endif 620 621 for (copied = 0; ((ipl = ifs->ifs_iplt[unit]) != NULL); copied += dlen) { 622 dlen = ipl->ipl_dsize; 623 if (dlen > uio->uio_resid) 624 break; 625 /* 626 * Don't hold the mutex over the uiomove call. 627 */ 628 ifs->ifs_iplt[unit] = ipl->ipl_next; 629 ifs->ifs_iplused[unit] -= dlen; 630 if (ifs->ifs_iplt[unit] == NULL) { 631 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit]; 632 ifs->ifs_ipll[unit] = NULL; 633 } 634 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 635 SPL_X(s); 636 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio); 637 if (error) { 638 SPL_NET(s); 639 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 640 ifs->ifs_iplused[unit] += dlen; 641 ipl->ipl_next = ifs->ifs_iplt[unit]; 642 ifs->ifs_iplt[unit] = ipl; 643 ifs->ifs_ipll[unit] = ipl; 644 if (ifs->ifs_iplh[unit] == &ifs->ifs_iplt[unit]) { 645 *ifs->ifs_iplh[unit] = ipl; 646 ifs->ifs_iplh[unit] = &ipl->ipl_next; 647 } 648 break; 649 } 650 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 651 KFREES((caddr_t)ipl, dlen); 652 SPL_NET(s); 653 } 654 655 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 656 SPL_X(s); 657 return error; 658 } 659 660 661 /* ------------------------------------------------------------------------ */ 662 /* Function: ipflog_clear */ 663 /* Returns: int - number of log bytes cleared. */ 664 /* Parameters: unit(I) - device we are reading from */ 665 /* */ 666 /* Deletes all queued up log records for a given output device. */ 667 /* ------------------------------------------------------------------------ */ 668 int ipflog_clear(unit, ifs) 669 minor_t unit; 670 ipf_stack_t *ifs; 671 { 672 iplog_t *ipl; 673 int used; 674 SPL_INT(s); 675 676 SPL_NET(s); 677 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 678 while ((ipl = ifs->ifs_iplt[unit]) != NULL) { 679 ifs->ifs_iplt[unit] = ipl->ipl_next; 680 KFREES((caddr_t)ipl, ipl->ipl_dsize); 681 } 682 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit]; 683 ifs->ifs_ipll[unit] = NULL; 684 used = ifs->ifs_iplused[unit]; 685 ifs->ifs_iplused[unit] = 0; 686 bzero((char *)&ifs->ifs_iplcrc[unit], FI_CSIZE); 687 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 688 SPL_X(s); 689 return used; 690 } 691 #endif /* IPFILTER_LOG */ 692