sys/dist/ipf/netinet/ip_log.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 1997-2003 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * Id: ip_log.c,v 2.75.2.25 2009/07/22 01:46:43 darrenr Exp
   9  */
  10
  11 #include <sys/cdefs.h>
  12 __KERNEL_RCSID(0, "$NetBSD$");
  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 # if (__NetBSD_Version__ < 399001400)
  24 #  include "opt_ipfilter_log.h"
  25 # else
  26 #  include "opt_ipfilter.h"
  27 # endif
  28 #endif
  29 #if defined(__FreeBSD__) && !defined(IPFILTER_LKM)
  30 # if defined(_KERNEL)
  31 #  if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
  32 #   include "opt_ipfilter.h"
  33 #  endif
  34 # else
  35 #  include <osreldate.h>
  36 # endif
  37 #endif
  38 #ifndef SOLARIS
  39 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
  40 #endif
  41 #include <sys/errno.h>
  42 #include <sys/types.h>
  43 #include <sys/file.h>
  44 #ifndef _KERNEL
  45 # include <stdio.h>
  46 # include <string.h>
  47 # include <stdlib.h>
  48 # include <ctype.h>
  49 # define _KERNEL
  50 # define KERNEL
  51 # ifdef __OpenBSD__
  52 struct file;
  53 # endif
  54 # include <sys/uio.h>
  55 # undef _KERNEL
  56 # undef KERNEL
  57 #endif
  58 #if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \
  59     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 !SOLARIS && !defined(__hpux) && !defined(linux)
  73 # if (defined(NetBSD) && (NetBSD > 199609)) || \
  74      (defined(OpenBSD) && (OpenBSD > 199603)) || \
  75      (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000))
  76 #  include <sys/dirent.h>
  77 # else
  78 #  include <sys/dir.h>
  79 # endif
  80 # include <sys/mbuf.h>
  81 # include <sys/select.h>
  82 # if __FreeBSD_version >= 500000
  83 #  include <sys/selinfo.h>
  84 # endif
  85 #else
  86 # if !defined(__hpux) && defined(_KERNEL)
  87 #  include <sys/filio.h>
  88 #  include <sys/cred.h>
  89 #  include <sys/ddi.h>
  90 #  include <sys/sunddi.h>
  91 #  include <sys/ksynch.h>
  92 #  include <sys/kmem.h>
  93 #  include <sys/mkdev.h>
  94 #  include <sys/dditypes.h>
  95 #  include <sys/cmn_err.h>
  96 # endif /* !__hpux */
  97 #endif /* !SOLARIS && !__hpux */
  98 #if !defined(linux)
  99 # include <sys/protosw.h>
 100 #endif
 101 #include <sys/socket.h>
 102
 103 #include <net/if.h>
 104 #ifdef sun
 105 # include <net/af.h>
 106 #endif
 107 #if __FreeBSD_version >= 300000
 108 # include <net/if_var.h>
 109 #endif
 110 #include <netinet/in.h>
 111 #ifdef __sgi
 112 # include <sys/ddi.h>
 113 # ifdef IFF_DRVRLOCK /* IRIX6 */
 114 #  include <sys/hashing.h>
 115 # endif
 116 #endif
 117 #if !defined(__hpux) && !defined(linux) && \
 118     !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/
 119 # include <netinet/in_var.h>
 120 #endif
 121 #include <netinet/in_systm.h>
 122 #include <netinet/ip.h>
 123 #include <netinet/tcp.h>
 124 #include <netinet/udp.h>
 125 #include <netinet/ip_icmp.h>
 126 #ifdef USE_INET6
 127 # include <netinet/icmp6.h>
 128 #endif
 129 #if !defined(linux)
 130 # include <netinet/ip_var.h>
 131 #endif
 132 #ifndef _KERNEL
 133 # include <syslog.h>
 134 #endif
 135 #include "netinet/ip_compat.h"
 136 #include <netinet/tcpip.h>
 137 #include "netinet/ip_fil.h"
 138 #include "netinet/ip_nat.h"
 139 #include "netinet/ip_frag.h"
 140 #include "netinet/ip_state.h"
 141 #include "netinet/ip_auth.h"
 142 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__)
 143 # include <sys/malloc.h>
 144 #endif
 145 /* END OF INCLUDES */
 146
 147 #ifdef  IPFILTER_LOG
 148
 149 # if defined(IPL_SELECT)
 150 #  include      <machine/sys/user.h>
 151 #  include      <sys/kthread_iface.h>
 152 #  define       READ_COLLISION  0x001
 153
 154 iplog_select_t  iplog_ss[IPL_LOGSIZE];
 155
 156 extern int selwait;
 157 # endif /* IPL_SELECT */
 158
 159 # if defined(linux) && defined(_KERNEL)
 160 wait_queue_head_t       iplh_linux[IPL_LOGSIZE];
 161 # endif
 162 # if SOLARIS && defined(_KERNEL)
 163 extern  kcondvar_t      iplwait;
 164 extern  struct pollhead iplpollhead[IPL_LOGSIZE];
 165 # endif
 166
 167 iplog_t **iplh[IPL_LOGSIZE], *iplt[IPL_LOGSIZE], *ipll[IPL_LOGSIZE];
 168 int     iplused[IPL_LOGSIZE];
 169 static fr_info_t        iplcrc[IPL_LOGSIZE];
 170 int     ipl_suppress = 1;
 171 int     ipl_logmax = IPL_LOGMAX;
 172 int     ipl_logall = 0;
 173 int     ipl_log_init = 0;
 174 int     ipl_logsize = IPFILTER_LOGSIZE;
 175 int     ipl_magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE,
 176                                    IPL_MAGIC, IPL_MAGIC, IPL_MAGIC,
 177                                    IPL_MAGIC, IPL_MAGIC };
 178
 179
 180 /* ------------------------------------------------------------------------ */
 181 /* Function:    fr_loginit                                                  */
 182 /* Returns:     int - 0 == success (always returned)                        */
 183 /* Parameters:  Nil                                                         */
 184 /*                                                                          */
 185 /* Initialise log buffers & pointers.  Also iniialised the CRC to a local   */
 186 /* secret for use in calculating the "last log checksum".                   */
 187 /* ------------------------------------------------------------------------ */
 188 int fr_loginit()
 189 {
 190         int     i;
 191
 192         for (i = IPL_LOGMAX; i >= 0; i--) {
 193                 iplt[i] = NULL;
 194                 ipll[i] = NULL;
 195                 iplh[i] = &iplt[i];
 196                 iplused[i] = 0;
 197                 bzero((char *)&iplcrc[i], sizeof(iplcrc[i]));
 198 # ifdef IPL_SELECT
 199                 iplog_ss[i].read_waiter = 0;
 200                 iplog_ss[i].state = 0;
 201 # endif
 202 # if defined(linux) && defined(_KERNEL)
 203                 init_waitqueue_head(iplh_linux + i);
 204 # endif
 205         }
 206
 207 # if SOLARIS && defined(_KERNEL)
 208         cv_init(&iplwait, "ipl condvar", CV_DRIVER, NULL);
 209 # endif
 210         MUTEX_INIT(&ipl_mutex, "ipf log mutex");
 211
 212         ipl_log_init = 1;
 213
 214         return 0;
 215 }
 216
 217
 218 /* ------------------------------------------------------------------------ */
 219 /* Function:    fr_logunload                                                */
 220 /* Returns:     Nil                                                         */
 221 /* Parameters:  Nil                                                         */
 222 /*                                                                          */
 223 /* Clean up any log data that has accumulated without being read.           */
 224 /* ------------------------------------------------------------------------ */
 225 void fr_logunload()
 226 {
 227         int i;
 228
 229         if (ipl_log_init == 0)
 230                 return;
 231
 232         for (i = IPL_LOGMAX; i >= 0; i--)
 233                 (void) ipflog_clear(i);
 234
 235 # if SOLARIS && defined(_KERNEL)
 236         cv_destroy(&iplwait);
 237 # endif
 238         MUTEX_DESTROY(&ipl_mutex);
 239
 240         ipl_log_init = 0;
 241 }
 242
 243
 244 /* ------------------------------------------------------------------------ */
 245 /* Function:    ipflog                                                      */
 246 /* Returns:     int - 0 == success, -1 == failure                           */
 247 /* Parameters:  fin(I)   - pointer to packet information                    */
 248 /*              flags(I) - flags from filter rules                          */
 249 /*                                                                          */
 250 /* Create a log record for a packet given that it has been triggered by a   */
 251 /* rule (or the default setting).  Calculate the transport protocol header  */
 252 /* size using predetermined size of a couple of popular protocols and thus  */
 253 /* how much data to copy into the log, including part of the data body if   */
 254 /* requested.                                                               */
 255 /* ------------------------------------------------------------------------ */
 256 int ipflog(fin, flags)
 257 fr_info_t *fin;
 258 u_int flags;
 259 {
 260         register size_t hlen;
 261         int types[2], mlen;
 262         size_t sizes[2];
 263         void *ptrs[2];
 264         ipflog_t ipfl;
 265         u_char p;
 266         mb_t *m;
 267 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) && \
 268   !defined(_INET_IP_STACK_H)
 269         qif_t *ifp;
 270 # else
 271         struct ifnet *ifp;
 272 # endif /* SOLARIS || __hpux */
 273
 274         m = fin->fin_m;
 275         if (m == NULL)
 276                 return -1;
 277
 278         ipfl.fl_nattag.ipt_num[0] = 0;
 279         ifp = fin->fin_ifp;
 280         if (fin->fin_exthdr != NULL)
 281                 hlen = (char *)fin->fin_dp - (char *)fin->fin_ip;
 282         else
 283                 hlen = fin->fin_hlen;
 284         /*
 285          * calculate header size.
 286          */
 287         if (fin->fin_off == 0) {
 288                 p = fin->fin_fi.fi_p;
 289                 if (p == IPPROTO_TCP)
 290                         hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
 291                 else if (p == IPPROTO_UDP)
 292                         hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
 293                 else if (p == IPPROTO_ICMP) {
 294                         struct icmp *icmp;
 295
 296                         icmp = (struct icmp *)fin->fin_dp;
 297
 298                         /*
 299                          * For ICMP, if the packet is an error packet, also
 300                          * include the information about the packet which
 301                          * caused the error.
 302                          */
 303                         switch (icmp->icmp_type)
 304                         {
 305                         case ICMP_UNREACH :
 306                         case ICMP_SOURCEQUENCH :
 307                         case ICMP_REDIRECT :
 308                         case ICMP_TIMXCEED :
 309                         case ICMP_PARAMPROB :
 310                                 hlen += MIN(sizeof(struct icmp) + 8,
 311                                             fin->fin_dlen);
 312                                 break;
 313                         default :
 314                                 hlen += MIN(sizeof(struct icmp),
 315                                             fin->fin_dlen);
 316                                 break;
 317                         }
 318                 }
 319 # ifdef USE_INET6
 320                 else if (p == IPPROTO_ICMPV6) {
 321                         struct icmp6_hdr *icmp;
 322
 323                         icmp = (struct icmp6_hdr *)fin->fin_dp;
 324
 325                         /*
 326                          * For ICMPV6, if the packet is an error packet, also
 327                          * include the information about the packet which
 328                          * caused the error.
 329                          */
 330                         if (icmp->icmp6_type < 128) {
 331                                 hlen += MIN(sizeof(struct icmp6_hdr) + 8,
 332                                             fin->fin_dlen);
 333                         } else {
 334                                 hlen += MIN(sizeof(struct icmp6_hdr),
 335                                             fin->fin_dlen);
 336                         }
 337                 }
 338 # endif
 339         }
 340         /*
 341          * Get the interface number and name to which this packet is
 342          * currently associated.
 343          */
 344 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) && \
 345      !defined(_INET_IP_STACK_H)
 346         ipfl.fl_unit = (u_int)ifp->qf_ppa;
 347         COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
 348 # else
 349 #  if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603)) || \
 350       (defined(OpenBSD) && (OpenBSD >= 199603)) || defined(linux) || \
 351       (defined(__FreeBSD__) && (__FreeBSD_version >= 501113)) || \
 352       (SOLARIS && defined(_INET_IP_STACK_H))
 353         COPYIFNAME(fin->fin_v, 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         COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
 363         ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0';
 364 #   endif
 365 #  endif
 366 # endif /* __hpux || SOLARIS */
 367         mlen = fin->fin_plen - hlen;
 368         if (!ipl_logall) {
 369                 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0;
 370         } else if ((flags & FR_LOGBODY) == 0) {
 371                 mlen = 0;
 372         }
 373         if (mlen < 0)
 374                 mlen = 0;
 375         ipfl.fl_plen = (u_char)mlen;
 376         ipfl.fl_hlen = (u_char)hlen;
 377         ipfl.fl_rule = fin->fin_rule;
 378         (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN);
 379         if (fin->fin_fr != NULL) {
 380                 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel;
 381                 ipfl.fl_logtag = fin->fin_fr->fr_logtag;
 382         } else {
 383                 ipfl.fl_loglevel = 0xffff;
 384                 ipfl.fl_logtag = FR_NOLOGTAG;
 385         }
 386         if (fin->fin_nattag != NULL)
 387                 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag,
 388                       sizeof(ipfl.fl_nattag));
 389         ipfl.fl_flags = flags;
 390         ipfl.fl_dir = fin->fin_out;
 391         ipfl.fl_lflags = fin->fin_flx;
 392         ptrs[0] = (void *)&ipfl;
 393         sizes[0] = sizeof(ipfl);
 394         types[0] = 0;
 395 # if defined(MENTAT) && defined(_KERNEL)
 396         /*
 397          * Are we copied from the mblk or an aligned array ?
 398          */
 399         if (fin->fin_ip == (ip_t *)m->b_rptr) {
 400                 ptrs[1] = m;
 401                 sizes[1] = hlen + mlen;
 402                 types[1] = 1;
 403         } else {
 404                 ptrs[1] = fin->fin_ip;
 405                 sizes[1] = hlen + mlen;
 406                 types[1] = 0;
 407         }
 408 # else
 409         ptrs[1] = m;
 410         sizes[1] = hlen + mlen;
 411         types[1] = 1;
 412 # endif /* MENTAT */
 413         return ipllog(IPL_LOGIPF, fin, ptrs, sizes, types, 2);
 414 }
 415
 416
 417 /* ------------------------------------------------------------------------ */
 418 /* Function:    ipllog                                                      */
 419 /* Returns:     int - 0 == success, -1 == failure                           */
 420 /* Parameters:  dev(I)    - device that owns this log record                */
 421 /*              fin(I)    - pointer to packet information                   */
 422 /*              items(I)  - array of pointers to log data                   */
 423 /*              itemsz(I) - array of size of valid memory pointed to        */
 424 /*              types(I)  - type of data pointed to by items pointers       */
 425 /*              cnt(I)    - number of elements in arrays items/itemsz/types */
 426 /*                                                                          */
 427 /* Takes an array of parameters and constructs one record to include the    */
 428 /* miscellaneous packet information, as well as packet data, for reading    */
 429 /* from the log device.                                                     */
 430 /* ------------------------------------------------------------------------ */
 431 int ipllog(dev, fin, items, itemsz, types, cnt)
 432 int dev;
 433 fr_info_t *fin;
 434 void **items;
 435 size_t *itemsz;
 436 int *types, cnt;
 437 {
 438         char *buf, *ptr;
 439         iplog_t *ipl;
 440         size_t len;
 441         int i;
 442         SPL_INT(s);
 443
 444         /*
 445          * Get the total amount of data to be logged.
 446          */
 447         for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
 448                 len += itemsz[i];
 449
 450         /*
 451          * check that we have space to record this information and can
 452          * allocate that much.
 453          */
 454         if ((iplused[dev] + len) > ipl_logsize)
 455                 return -1;
 456
 457         KMALLOCS(buf, char *, len);
 458         if (buf == NULL)
 459                 return -1;
 460         ipl = (iplog_t *)buf;
 461         ipl->ipl_magic = ipl_magic[dev];
 462         ipl->ipl_count = 1;
 463         ipl->ipl_next = NULL;
 464         ipl->ipl_dsize = len;
 465 #ifdef _KERNEL
 466         GETKTIME(&ipl->ipl_sec);
 467 #else
 468         ipl->ipl_sec = 0;
 469         ipl->ipl_usec = 0;
 470 #endif
 471
 472         /*
 473          * Loop through all the items to be logged, copying each one to the
 474          * buffer.  Use bcopy for normal data or the mb_t copyout routine.
 475          */
 476         for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) {
 477                 if (types[i] == 0) {
 478                         memcpy(ptr, items[i], itemsz[i]);
 479                 } else if (types[i] == 1) {
 480                         COPYDATA(items[i], 0, itemsz[i], (char *)ptr);
 481                 }
 482                 ptr += itemsz[i];
 483         }
 484
 485         SPL_NET(s);
 486         MUTEX_ENTER(&ipl_mutex);
 487         /*
 488          * Check to see if this log record has a CRC which matches the last
 489          * record logged.  If it does, just up the count on the previous one
 490          * rather than create a new one.
 491          */
 492         if (ipl_suppress) {
 493                 if ((fin != NULL) && (fin->fin_off == 0)) {
 494                         if ((ipll[dev] != NULL) &&
 495                             bcmp((char *)fin, (char *)&iplcrc[dev],
 496                                  FI_LCSIZE) == 0) {
 497                                 ipll[dev]->ipl_count++;
 498                                 MUTEX_EXIT(&ipl_mutex);
 499                                 SPL_X(s);
 500                                 KFREES(buf, len);
 501                                 return 0;
 502                         }
 503                         bcopy((char *)fin, (char *)&iplcrc[dev], FI_LCSIZE);
 504                 } else
 505                         bzero((char *)&iplcrc[dev], FI_CSIZE);
 506         }
 507
 508         /*
 509          * advance the log pointer to the next empty record and deduct the
 510          * amount of space we're going to use.
 511          */
 512         ipll[dev] = ipl;
 513         *iplh[dev] = ipl;
 514         iplh[dev] = &ipl->ipl_next;
 515         iplused[dev] += len;
 516
 517         /*
 518          * Now that the log record has been completed and added to the queue,
 519          * wake up any listeners who may want to read it.
 520          */
 521 # if SOLARIS && defined(_KERNEL)
 522         cv_signal(&iplwait);
 523         MUTEX_EXIT(&ipl_mutex);
 524         pollwakeup(&iplpollhead[dev], POLLRDNORM);
 525 # else
 526         MUTEX_EXIT(&ipl_mutex);
 527         WAKEUP(iplh, dev);
 528         POLLWAKEUP(dev);
 529 # endif
 530         SPL_X(s);
 531 # ifdef IPL_SELECT
 532         iplog_input_ready(dev);
 533 # endif
 534         return 0;
 535 }
 536
 537
 538 /* ------------------------------------------------------------------------ */
 539 /* Function:    ipflog_read                                                 */
 540 /* Returns:     int    - 0 == success, else error value.                    */
 541 /* Parameters:  unit(I) - device we are reading from                        */
 542 /*              uio(O)  - pointer to information about where to store data  */
 543 /*                                                                          */
 544 /* Called to handle a read on an IPFilter device.  Returns only complete    */
 545 /* log messages - will not partially copy a log record out to userland.     */
 546 /*                                                                          */
 547 /* NOTE: This function will block and wait for a signal to return data if   */
 548 /* there is none present.  Asynchronous I/O is not implemented.             */
 549 /* ------------------------------------------------------------------------ */
 550 int ipflog_read(unit, uio)
 551 minor_t unit;
 552 struct uio *uio;
 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 > 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(&ipl_mutex);
 577
 578         while (iplt[unit] == NULL) {
 579 # if SOLARIS && defined(_KERNEL)
 580                 if (!cv_wait_sig(&iplwait, &ipl_mutex.ipf_lk)) {
 581                         MUTEX_EXIT(&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(&ipl_mutex);
 592                         return 0;
 593                 }
 594 #   endif
 595
 596                 MUTEX_EXIT(&ipl_mutex);
 597                 l = get_sleep_lock(&iplh[unit]);
 598                 error = sleep(&iplh[unit], PZERO+1);
 599                 spinunlock(l);
 600 #  else
 601 #   if defined(__osf__) && defined(_KERNEL)
 602                 error = mpsleep(&iplh[unit], PSUSP|PCATCH,  "iplread", 0,
 603                                 &ipl_mutex, MS_LOCK_SIMPLE);
 604 #   else
 605                 MUTEX_EXIT(&ipl_mutex);
 606                 SPL_X(s);
 607                 error = SLEEP(unit + iplh, "ipl sleep");
 608 #   endif /* __osf__ */
 609 #  endif /* __hpux */
 610                 if (error)
 611                         return error;
 612                 SPL_NET(s);
 613                 MUTEX_ENTER(&ipl_mutex);
 614 # endif /* SOLARIS */
 615         }
 616
 617 # if (defined(BSD) && (BSD >= 199101)) || defined(__FreeBSD__) || \
 618      defined(__osf__)
 619         uio->uio_rw = UIO_READ;
 620 # endif
 621
 622         for (copied = 0; (ipl = iplt[unit]) != NULL; copied += dlen) {
 623                 dlen = ipl->ipl_dsize;
 624                 if (dlen > uio->uio_resid)
 625                         break;
 626                 /*
 627                  * Don't hold the mutex over the uiomove call.
 628                  */
 629                 iplt[unit] = ipl->ipl_next;
 630                 iplused[unit] -= dlen;
 631                 MUTEX_EXIT(&ipl_mutex);
 632                 SPL_X(s);
 633                 error = UIOMOVE((void *)ipl, dlen, UIO_READ, uio);
 634                 if (error) {
 635                         SPL_NET(s);
 636                         MUTEX_ENTER(&ipl_mutex);
 637                         ipl->ipl_next = iplt[unit];
 638                         iplt[unit] = ipl;
 639                         iplused[unit] += dlen;
 640                         break;
 641                 }
 642                 MUTEX_ENTER(&ipl_mutex);
 643                 KFREES((void *)ipl, dlen);
 644                 SPL_NET(s);
 645         }
 646         if (!iplt[unit]) {
 647                 iplused[unit] = 0;
 648                 iplh[unit] = &iplt[unit];
 649                 ipll[unit] = NULL;
 650         }
 651
 652         MUTEX_EXIT(&ipl_mutex);
 653         SPL_X(s);
 654         return error;
 655 }
 656
 657
 658 /* ------------------------------------------------------------------------ */
 659 /* Function:    ipflog_clear                                                */
 660 /* Returns:     int    - number of log bytes cleared.                       */
 661 /* Parameters:  unit(I) - device we are reading from                        */
 662 /*                                                                          */
 663 /* Deletes all queued up log records for a given output device.             */
 664 /* ------------------------------------------------------------------------ */
 665 int ipflog_clear(unit)
 666 minor_t unit;
 667 {
 668         iplog_t *ipl;
 669         int used;
 670         SPL_INT(s);
 671
 672         SPL_NET(s);
 673         MUTEX_ENTER(&ipl_mutex);
 674         while ((ipl = iplt[unit]) != NULL) {
 675                 iplt[unit] = ipl->ipl_next;
 676                 KFREES((void *)ipl, ipl->ipl_dsize);
 677         }
 678         iplh[unit] = &iplt[unit];
 679         ipll[unit] = NULL;
 680         used = iplused[unit];
 681         iplused[unit] = 0;
 682         bzero((char *)&iplcrc[unit], FI_CSIZE);
 683         MUTEX_EXIT(&ipl_mutex);
 684         SPL_X(s);
 685         return used;
 686 }
 687
 688
 689 /* ------------------------------------------------------------------------ */
 690 /* Function:    ipflog_canread                                              */
 691 /* Returns:     int    - 0 == no data to read, 1 = data present             */
 692 /* Parameters:  unit(I) - device we are reading from                        */
 693 /*                                                                          */
 694 /* Returns an indication of whether or not there is data present in the     */
 695 /* current buffer for the selected ipf device.                              */
 696 /* ------------------------------------------------------------------------ */
 697 int ipflog_canread(unit)
 698 int unit;
 699 {
 700         return iplt[unit] != NULL;
 701 }
 702 #endif /* IPFILTER_LOG */