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 2008 Sun Microsystems, Inc. All rights reserved. 9 * Use is subject to license terms. 10 * 11 * Copyright (c) 2014, Joyent, Inc. All rights reserved. 12 */ 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 #ifdef SOLARIS 35 #undef SOLARIS 36 #endif 37 #if (defined(sun) && (defined(__svr4__) || defined(__SVR4))) 38 #define SOLARIS (1) 39 #else 40 #define SOLARIS (0) 41 #endif 42 #include <sys/errno.h> 43 #include <sys/types.h> 44 #include <sys/file.h> 45 #ifndef _KERNEL 46 # include <stdio.h> 47 # include <string.h> 48 # include <stdlib.h> 49 # include <ctype.h> 50 # define _KERNEL 51 # define KERNEL 52 # ifdef __OpenBSD__ 53 struct file; 54 # endif 55 # include <sys/uio.h> 56 # undef _KERNEL 57 # undef KERNEL 58 #endif 59 #if __FreeBSD_version >= 220000 && defined(_KERNEL) 60 # include <sys/fcntl.h> 61 # include <sys/filio.h> 62 #else 63 # include <sys/ioctl.h> 64 #endif 65 #include <sys/time.h> 66 #if defined(_KERNEL) 67 # include <sys/systm.h> 68 # if defined(NetBSD) && (__NetBSD_Version__ >= 104000000) 69 # include <sys/proc.h> 70 # endif 71 #endif /* _KERNEL */ 72 #if !defined(SOLARIS) && !defined(__hpux) && !defined(linux) 73 # if (NetBSD > 199609) || (OpenBSD > 199603) || (__FreeBSD_version >= 300000) 74 # include <sys/dirent.h> 75 # else 76 # include <sys/dir.h> 77 # endif 78 # include <sys/mbuf.h> 79 #else 80 # if !defined(__hpux) && defined(_KERNEL) 81 # include <sys/filio.h> 82 # include <sys/cred.h> 83 # include <sys/ddi.h> 84 # include <sys/sunddi.h> 85 # include <sys/ksynch.h> 86 # include <sys/kmem.h> 87 # include <sys/mkdev.h> 88 # include <sys/dditypes.h> 89 # include <sys/cmn_err.h> 90 # endif /* !__hpux */ 91 #endif /* !SOLARIS && !__hpux */ 92 #if !defined(linux) 93 # include <sys/protosw.h> 94 #endif 95 #include <sys/socket.h> 96 97 #include <net/if.h> 98 #ifdef sun 99 # include <net/af.h> 100 #endif 101 #if __FreeBSD_version >= 300000 102 # include <net/if_var.h> 103 #endif 104 #include <net/route.h> 105 #include <netinet/in.h> 106 #ifdef __sgi 107 # include <sys/ddi.h> 108 # ifdef IFF_DRVRLOCK /* IRIX6 */ 109 # include <sys/hashing.h> 110 # endif 111 #endif 112 #if !defined(__hpux) && !defined(linux) && \ 113 !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/ 114 # include <netinet/in_var.h> 115 #endif 116 #include <netinet/in_systm.h> 117 #include <netinet/ip.h> 118 #include <netinet/tcp.h> 119 #include <netinet/udp.h> 120 #include <netinet/ip_icmp.h> 121 #ifdef USE_INET6 122 # include <netinet/icmp6.h> 123 #endif 124 #if !defined(linux) 125 # include <netinet/ip_var.h> 126 #endif 127 #ifndef _KERNEL 128 # include <syslog.h> 129 #endif 130 #include "netinet/ip_compat.h" 131 #include <netinet/tcpip.h> 132 #include "netinet/ip_fil.h" 133 #include "netinet/ip_nat.h" 134 #include "netinet/ip_frag.h" 135 #include "netinet/ip_state.h" 136 #include "netinet/ip_auth.h" 137 #include "netinet/ipf_stack.h" 138 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__) 139 # include <sys/malloc.h> 140 #endif 141 /* END OF INCLUDES */ 142 143 #ifdef IPFILTER_LOG 144 145 # if defined(IPL_SELECT) 146 # include <machine/sys/user.h> 147 # include <sys/kthread_iface.h> 148 # define READ_COLLISION 0x001 149 150 iplog_select_t iplog_ss[IPL_LOGMAX+1]; 151 152 extern int selwait; 153 # endif /* IPL_SELECT */ 154 155 /* ipl_magic never changes */ 156 int ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE, 157 IPL_MAGIC, IPL_MAGIC, IPL_MAGIC, 158 IPL_MAGIC, IPL_MAGIC }; 159 160 /* ------------------------------------------------------------------------ */ 161 /* Function: fr_loginit */ 162 /* Returns: int - 0 == success (always returned) */ 163 /* Parameters: Nil */ 164 /* */ 165 /* Initialise log buffers & pointers. Also iniialised the CRC to a local */ 166 /* secret for use in calculating the "last log checksum". */ 167 /* ------------------------------------------------------------------------ */ 168 int fr_loginit(ifs) 169 ipf_stack_t *ifs; 170 { 171 int i; 172 173 for (i = IPL_LOGMAX; i >= 0; i--) { 174 ifs->ifs_iplt[i] = NULL; 175 ifs->ifs_ipll[i] = NULL; 176 ifs->ifs_iplh[i] = &ifs->ifs_iplt[i]; 177 ifs->ifs_iplused[i] = 0; 178 bzero((char *)&ifs->ifs_iplcrc[i], sizeof(ifs->ifs_iplcrc[i])); 179 # ifdef IPL_SELECT 180 iplog_ss[i].read_waiter = 0; 181 iplog_ss[i].state = 0; 182 # endif 183 # if defined(linux) && defined(_KERNEL) 184 init_waitqueue_head(iplh_linux + i); 185 # endif 186 } 187 188 # if defined(SOLARIS) && defined(_KERNEL) 189 cv_init(&ifs->ifs_iplwait, "ipl condvar", CV_DRIVER, NULL); 190 # endif 191 MUTEX_INIT(&ifs->ifs_ipl_mutex, "ipf log mutex"); 192 193 ifs->ifs_ipl_log_init = 1; 194 195 return 0; 196 } 197 198 199 /* ------------------------------------------------------------------------ */ 200 /* Function: fr_logunload */ 201 /* Returns: Nil */ 202 /* Parameters: Nil */ 203 /* */ 204 /* Clean up any log data that has accumulated without being read. */ 205 /* ------------------------------------------------------------------------ */ 206 void fr_logunload(ifs) 207 ipf_stack_t *ifs; 208 { 209 int i; 210 211 if (ifs->ifs_ipl_log_init == 0) 212 return; 213 214 for (i = IPL_LOGMAX; i >= 0; i--) 215 (void) ipflog_clear(i, ifs); 216 217 # if defined(SOLARIS) && defined(_KERNEL) 218 cv_destroy(&ifs->ifs_iplwait); 219 # endif 220 MUTEX_DESTROY(&ifs->ifs_ipl_mutex); 221 222 ifs->ifs_ipl_log_init = 0; 223 } 224 225 226 /* ------------------------------------------------------------------------ */ 227 /* Function: ipflog */ 228 /* Returns: int - 0 == success, -1 == failure */ 229 /* Parameters: fin(I) - pointer to packet information */ 230 /* flags(I) - flags from filter rules */ 231 /* */ 232 /* Create a log record for a packet given that it has been triggered by a */ 233 /* rule (or the default setting). Calculate the transport protocol header */ 234 /* size using predetermined size of a couple of popular protocols and thus */ 235 /* how much data to copy into the log, including part of the data body if */ 236 /* requested. */ 237 /* ------------------------------------------------------------------------ */ 238 int ipflog(fin, flags) 239 fr_info_t *fin; 240 u_int flags; 241 { 242 register size_t hlen; 243 int types[2], mlen; 244 size_t sizes[2]; 245 void *ptrs[2]; 246 ipflog_t ipfl; 247 u_char p; 248 mb_t *m; 249 # if defined(SOLARIS) && defined(_KERNEL) 250 net_handle_t nif; 251 void *ifp; 252 # else 253 # if defined(__hpux) && defined(_KERNEL) 254 qif_t *ifp; 255 # else 256 struct ifnet *ifp; 257 # endif 258 # endif /* SOLARIS */ 259 ipf_stack_t *ifs = fin->fin_ifs; 260 261 ipfl.fl_nattag.ipt_num[0] = 0; 262 m = fin->fin_m; 263 ifp = fin->fin_ifp; 264 hlen = fin->fin_hlen; 265 /* 266 * calculate header size. 267 */ 268 if (fin->fin_off == 0) { 269 p = fin->fin_fi.fi_p; 270 if (p == IPPROTO_TCP) 271 hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen); 272 else if (p == IPPROTO_UDP) 273 hlen += MIN(sizeof(udphdr_t), fin->fin_dlen); 274 else if (p == IPPROTO_ICMP) { 275 struct icmp *icmp; 276 277 icmp = (struct icmp *)fin->fin_dp; 278 279 /* 280 * For ICMP, if the packet is an error packet, also 281 * include the information about the packet which 282 * caused the error. 283 */ 284 switch (icmp->icmp_type) 285 { 286 case ICMP_UNREACH : 287 case ICMP_SOURCEQUENCH : 288 case ICMP_REDIRECT : 289 case ICMP_TIMXCEED : 290 case ICMP_PARAMPROB : 291 hlen += MIN(sizeof(struct icmp) + 8, 292 fin->fin_dlen); 293 break; 294 default : 295 hlen += MIN(sizeof(struct icmp), 296 fin->fin_dlen); 297 break; 298 } 299 } 300 # ifdef USE_INET6 301 else if (p == IPPROTO_ICMPV6) { 302 struct icmp6_hdr *icmp; 303 304 icmp = (struct icmp6_hdr *)fin->fin_dp; 305 306 /* 307 * For ICMPV6, if the packet is an error packet, also 308 * include the information about the packet which 309 * caused the error. 310 */ 311 if (icmp->icmp6_type < 128) { 312 hlen += MIN(sizeof(struct icmp6_hdr) + 8, 313 fin->fin_dlen); 314 } else { 315 hlen += MIN(sizeof(struct icmp6_hdr), 316 fin->fin_dlen); 317 } 318 } 319 # endif 320 } 321 /* 322 * Get the interface number and name to which this packet is 323 * currently associated. 324 */ 325 # if defined(SOLARIS) && defined(_KERNEL) 326 ipfl.fl_unit = (u_int)0; 327 nif = NULL; 328 if (fin->fin_fi.fi_v == 4) 329 nif = ifs->ifs_ipf_ipv4; 330 else if (fin->fin_fi.fi_v == 6) 331 nif = ifs->ifs_ipf_ipv6; 332 if (nif != NULL) { 333 if (net_getifname(nif, (phy_if_t)ifp, 334 ipfl.fl_ifname, sizeof(ipfl.fl_ifname)) != 0) 335 return (-1); 336 } 337 338 # else 339 # if defined(__hpux) && defined(_KERNEL) 340 ipfl.fl_unit = (u_int)0; 341 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 342 # else 343 # if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \ 344 (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \ 345 (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) 346 COPYIFNAME(ifp, ipfl.fl_ifname); 347 # else 348 ipfl.fl_unit = (u_int)ifp->if_unit; 349 # if defined(_KERNEL) 350 if ((ipfl.fl_ifname[0] = ifp->if_name[0])) 351 if ((ipfl.fl_ifname[1] = ifp->if_name[1])) 352 if ((ipfl.fl_ifname[2] = ifp->if_name[2])) 353 ipfl.fl_ifname[3] = ifp->if_name[3]; 354 # else 355 (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname)); 356 ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0'; 357 # endif 358 # endif 359 # endif /* __hpux */ 360 # endif /* SOLARIS */ 361 mlen = fin->fin_plen - hlen; 362 if (!ifs->ifs_ipl_logall) { 363 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0; 364 } else if ((flags & FR_LOGBODY) == 0) { 365 mlen = 0; 366 } 367 if (mlen < 0) 368 mlen = 0; 369 ipfl.fl_plen = (u_char)mlen; 370 ipfl.fl_hlen = (u_char)hlen; 371 ipfl.fl_rule = fin->fin_rule; 372 (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN); 373 if (fin->fin_fr != NULL) { 374 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel; 375 ipfl.fl_logtag = fin->fin_fr->fr_logtag; 376 } else { 377 ipfl.fl_loglevel = 0xffff; 378 ipfl.fl_logtag = FR_NOLOGTAG; 379 } 380 if (fin->fin_nattag != NULL) 381 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag, 382 sizeof(ipfl.fl_nattag)); 383 ipfl.fl_flags = flags; 384 ipfl.fl_dir = fin->fin_out; 385 ipfl.fl_lflags = fin->fin_flx; 386 ptrs[0] = (void *)&ipfl; 387 sizes[0] = sizeof(ipfl); 388 types[0] = 0; 389 # if defined(MENTAT) && defined(_KERNEL) 390 /* 391 * Are we copied from the mblk or an aligned array ? 392 */ 393 if (fin->fin_ip == (ip_t *)m->b_rptr) { 394 ptrs[1] = m; 395 sizes[1] = hlen + mlen; 396 types[1] = 1; 397 } else { 398 ptrs[1] = fin->fin_ip; 399 sizes[1] = hlen + mlen; 400 types[1] = 0; 401 } 402 # else 403 ptrs[1] = m; 404 sizes[1] = hlen + mlen; 405 types[1] = 1; 406 # endif /* MENTAT */ 407 return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2, fin->fin_ifs); 408 } 409 410 411 /* ------------------------------------------------------------------------ */ 412 /* Function: ipllog */ 413 /* Returns: int - 0 == success, -1 == failure */ 414 /* Parameters: dev(I) - device that owns this log record */ 415 /* fin(I) - pointer to packet information */ 416 /* items(I) - array of pointers to log data */ 417 /* itemsz(I) - array of size of valid memory pointed to */ 418 /* types(I) - type of data pointed to by items pointers */ 419 /* cnt(I) - number of elements in arrays items/itemsz/types */ 420 /* */ 421 /* Takes an array of parameters and constructs one record to include the */ 422 /* miscellaneous packet information, as well as packet data, for reading */ 423 /* from the log device. */ 424 /* ------------------------------------------------------------------------ */ 425 int ipllog(dev, fin, items, itemsz, types, cnt, ifs) 426 int dev; 427 fr_info_t *fin; 428 void **items; 429 size_t *itemsz; 430 int *types, cnt; 431 ipf_stack_t *ifs; 432 { 433 caddr_t buf, ptr; 434 iplog_t *ipl; 435 size_t len; 436 int i; 437 SPL_INT(s); 438 439 /* 440 * Check to see if this log record has a CRC which matches the last 441 * record logged. If it does, just up the count on the previous one 442 * rather than create a new one. 443 */ 444 if (ifs->ifs_ipl_suppress) { 445 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 446 if ((fin != NULL) && (fin->fin_off == 0)) { 447 if ((ifs->ifs_ipll[dev] != NULL) && 448 bcmp((char *)fin, (char *)&ifs->ifs_iplcrc[dev], 449 FI_LCSIZE) == 0) { 450 ifs->ifs_ipll[dev]->ipl_count++; 451 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 452 return 0; 453 } 454 bcopy((char *)fin, (char *)&ifs->ifs_iplcrc[dev], 455 FI_LCSIZE); 456 } else 457 bzero((char *)&ifs->ifs_iplcrc[dev], FI_CSIZE); 458 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 459 } 460 461 /* 462 * Get the total amount of data to be logged. 463 */ 464 for (i = 0, len = sizeof(iplog_t); i < cnt; i++) 465 len += itemsz[i]; 466 467 /* 468 * check that we have space to record this information and can 469 * allocate that much. 470 */ 471 KMALLOCS(buf, caddr_t, len); 472 if (buf == NULL) 473 return -1; 474 SPL_NET(s); 475 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 476 if ((ifs->ifs_iplused[dev] + len) > IPFILTER_LOGSIZE) { 477 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 478 SPL_X(s); 479 KFREES(buf, len); 480 return -1; 481 } 482 ifs->ifs_iplused[dev] += len; 483 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 484 SPL_X(s); 485 486 /* 487 * advance the log pointer to the next empty record and deduct the 488 * amount of space we're going to use. 489 */ 490 ipl = (iplog_t *)buf; 491 ipl->ipl_magic = ipl_magic[dev]; 492 ipl->ipl_count = 1; 493 ipl->ipl_next = NULL; 494 ipl->ipl_dsize = len; 495 #ifdef _KERNEL 496 GETKTIME(&ipl->ipl_sec); 497 #else 498 ipl->ipl_sec = 0; 499 ipl->ipl_usec = 0; 500 #endif 501 502 /* 503 * Loop through all the items to be logged, copying each one to the 504 * buffer. Use bcopy for normal data or the mb_t copyout routine. 505 */ 506 for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) { 507 if (types[i] == 0) { 508 bcopy(items[i], ptr, itemsz[i]); 509 } else if (types[i] == 1) { 510 COPYDATA(items[i], 0, itemsz[i], ptr); 511 } 512 ptr += itemsz[i]; 513 } 514 SPL_NET(s); 515 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 516 ifs->ifs_ipll[dev] = ipl; 517 *ifs->ifs_iplh[dev] = ipl; 518 ifs->ifs_iplh[dev] = &ipl->ipl_next; 519 520 /* 521 * Now that the log record has been completed and added to the queue, 522 * wake up any listeners who may want to read it. 523 */ 524 # if defined(SOLARIS) && defined(_KERNEL) 525 cv_signal(&ifs->ifs_iplwait); 526 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 527 # else 528 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 529 WAKEUP(&ifs->ifs_iplh, dev); 530 # endif 531 SPL_X(s); 532 # ifdef IPL_SELECT 533 iplog_input_ready(dev); 534 # endif 535 return 0; 536 } 537 538 539 /* ------------------------------------------------------------------------ */ 540 /* Function: ipflog_read */ 541 /* Returns: int - 0 == success, else error value. */ 542 /* Parameters: unit(I) - device we are reading from */ 543 /* uio(O) - pointer to information about where to store data */ 544 /* */ 545 /* Called to handle a read on an IPFilter device. Returns only complete */ 546 /* log messages - will not partially copy a log record out to userland. */ 547 /* */ 548 /* NOTE: This function will block and wait for a signal to return data if */ 549 /* there is none present. Asynchronous I/O is not implemented. */ 550 /* ------------------------------------------------------------------------ */ 551 int ipflog_read(unit, uio, ifs) 552 minor_t unit; 553 struct uio *uio; 554 ipf_stack_t *ifs; 555 { 556 size_t dlen, copied; 557 int error = 0; 558 iplog_t *ipl; 559 SPL_INT(s); 560 561 /* 562 * Sanity checks. Make sure the minor # is valid and we're copying 563 * a valid chunk of data. 564 */ 565 if (IPL_LOGMAX < unit) 566 return ENXIO; 567 if (uio->uio_resid == 0) 568 return 0; 569 if ((uio->uio_resid < sizeof(iplog_t)) || 570 (uio->uio_resid > ifs->ifs_ipl_logsize)) 571 return EINVAL; 572 573 /* 574 * Lock the log so we can snapshot the variables. Wait for a signal 575 * if the log is empty. 576 */ 577 SPL_NET(s); 578 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 579 580 while (ifs->ifs_iplt[unit] == NULL) { 581 # if defined(SOLARIS) && defined(_KERNEL) 582 /* 583 * Prevent a deadlock with ipldetach() - see the "ipfilter 584 * kernel module mutexes and locking" comment block in solaris.c 585 * for details. 586 */ 587 RWLOCK_EXIT(&ifs->ifs_ipf_global); 588 if (!cv_wait_sig(&ifs->ifs_iplwait, &ifs->ifs_ipl_mutex.ipf_lk)) { 589 READ_ENTER(&ifs->ifs_ipf_global); 590 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 591 return EINTR; 592 } 593 READ_ENTER(&ifs->ifs_ipf_global); 594 # else 595 # if defined(__hpux) && defined(_KERNEL) 596 lock_t *l; 597 598 # ifdef IPL_SELECT 599 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) { 600 /* this is no blocking system call */ 601 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 602 return 0; 603 } 604 # endif 605 606 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 607 l = get_sleep_lock(&ifs->ifs_iplh[unit]); 608 error = sleep(&ifs->ifs_iplh[unit], PZERO+1); 609 spinunlock(l); 610 # else 611 # if defined(__osf__) && defined(_KERNEL) 612 error = mpsleep(&ifs->ifs_iplh[unit], PSUSP|PCATCH, "iplread", 0, 613 &ifs->ifs_ipl_mutex, MS_LOCK_SIMPLE); 614 # else 615 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 616 SPL_X(s); 617 error = SLEEP(&ifs->ifs_iplh[unit], "ipl sleep"); 618 # endif /* __osf__ */ 619 # endif /* __hpux */ 620 if (error) 621 return error; 622 SPL_NET(s); 623 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 624 # endif /* SOLARIS */ 625 } 626 627 # if (BSD >= 199101) || defined(__FreeBSD__) || defined(__osf__) 628 uio->uio_rw = UIO_READ; 629 # endif 630 631 for (copied = 0; ((ipl = ifs->ifs_iplt[unit]) != NULL); copied += dlen) { 632 dlen = ipl->ipl_dsize; 633 if (dlen > uio->uio_resid) 634 break; 635 /* 636 * Don't hold the mutex over the uiomove call. 637 */ 638 ifs->ifs_iplt[unit] = ipl->ipl_next; 639 ifs->ifs_iplused[unit] -= dlen; 640 if (ifs->ifs_iplt[unit] == NULL) { 641 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit]; 642 ifs->ifs_ipll[unit] = NULL; 643 } 644 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 645 SPL_X(s); 646 error = UIOMOVE((caddr_t)ipl, dlen, UIO_READ, uio); 647 if (error) { 648 SPL_NET(s); 649 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 650 ifs->ifs_iplused[unit] += dlen; 651 ipl->ipl_next = ifs->ifs_iplt[unit]; 652 ifs->ifs_iplt[unit] = ipl; 653 ifs->ifs_ipll[unit] = ipl; 654 if (ifs->ifs_iplh[unit] == &ifs->ifs_iplt[unit]) { 655 *ifs->ifs_iplh[unit] = ipl; 656 ifs->ifs_iplh[unit] = &ipl->ipl_next; 657 } 658 break; 659 } 660 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 661 KFREES((caddr_t)ipl, dlen); 662 SPL_NET(s); 663 } 664 665 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 666 SPL_X(s); 667 return error; 668 } 669 670 671 /* ------------------------------------------------------------------------ */ 672 /* Function: ipflog_clear */ 673 /* Returns: int - number of log bytes cleared. */ 674 /* Parameters: unit(I) - device we are reading from */ 675 /* */ 676 /* Deletes all queued up log records for a given output device. */ 677 /* ------------------------------------------------------------------------ */ 678 int ipflog_clear(unit, ifs) 679 minor_t unit; 680 ipf_stack_t *ifs; 681 { 682 iplog_t *ipl; 683 int used; 684 SPL_INT(s); 685 686 SPL_NET(s); 687 MUTEX_ENTER(&ifs->ifs_ipl_mutex); 688 while ((ipl = ifs->ifs_iplt[unit]) != NULL) { 689 ifs->ifs_iplt[unit] = ipl->ipl_next; 690 KFREES((caddr_t)ipl, ipl->ipl_dsize); 691 } 692 ifs->ifs_iplh[unit] = &ifs->ifs_iplt[unit]; 693 ifs->ifs_ipll[unit] = NULL; 694 used = ifs->ifs_iplused[unit]; 695 ifs->ifs_iplused[unit] = 0; 696 bzero((char *)&ifs->ifs_iplcrc[unit], FI_CSIZE); 697 MUTEX_EXIT(&ifs->ifs_ipl_mutex); 698 SPL_X(s); 699 return used; 700 } 701 #endif /* IPFILTER_LOG */ 702