sys/contrib/ipfilter/netinet/ip_log.c

   1 /*      $FreeBSD$       */
   2
   3 /*
   4  * Copyright (C) 2012 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * $FreeBSD$
   9  * Id: ip_log.c,v 2.75.2.19 2007/09/09 11:32:06 darrenr Exp $
  10  */
  11 #include <sys/param.h>
  12 #if defined(KERNEL) || defined(_KERNEL)
  13 # undef KERNEL
  14 # undef _KERNEL
  15 # define        KERNEL  1
  16 # define        _KERNEL 1
  17 #endif
  18 #if defined(__FreeBSD__) && !defined(_KERNEL)
  19 # include <osreldate.h>
  20 #endif
  21 #ifndef SOLARIS
  22 # define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
  23 #endif
  24 #include <sys/errno.h>
  25 #include <sys/types.h>
  26 #include <sys/file.h>
  27 #ifndef _KERNEL
  28 # include <stdio.h>
  29 # include <string.h>
  30 # include <stdlib.h>
  31 # include <ctype.h>
  32 # define _KERNEL
  33 # define KERNEL
  34 # ifdef __OpenBSD__
  35 struct file;
  36 # endif
  37 # include <sys/uio.h>
  38 # undef _KERNEL
  39 # undef KERNEL
  40 #endif
  41 #if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \
  42     defined(_KERNEL)
  43 # include <sys/fcntl.h>
  44 # include <sys/filio.h>
  45 #else
  46 # include <sys/ioctl.h>
  47 #endif
  48 #include <sys/time.h>
  49 #if defined(_KERNEL)
  50 # include <sys/systm.h>
  51 # if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000))
  52 #  include <sys/proc.h>
  53 # endif
  54 #endif /* _KERNEL */
  55 #if !SOLARIS && !defined(__hpux) && !defined(linux)
  56 # if (defined(NetBSD) && (NetBSD > 199609)) || \
  57      (defined(OpenBSD) && (OpenBSD > 199603)) || \
  58      (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000))
  59 #  include <sys/dirent.h>
  60 # else
  61 #  include <sys/dir.h>
  62 # endif
  63 # include <sys/mbuf.h>
  64 # include <sys/select.h>
  65 # if __FreeBSD_version >= 500000
  66 #  include <sys/selinfo.h>
  67 # endif
  68 #else
  69 # if !defined(__hpux) && defined(_KERNEL)
  70 #  include <sys/filio.h>
  71 #  include <sys/cred.h>
  72 #  include <sys/ddi.h>
  73 #  include <sys/sunddi.h>
  74 #  include <sys/ksynch.h>
  75 #  include <sys/kmem.h>
  76 #  include <sys/mkdev.h>
  77 #  include <sys/dditypes.h>
  78 #  include <sys/cmn_err.h>
  79 # endif /* !__hpux */
  80 #endif /* !SOLARIS && !__hpux */
  81 #if !defined(linux)
  82 # include <sys/protosw.h>
  83 #endif
  84 #include <sys/socket.h>
  85
  86 #include <net/if.h>
  87 #ifdef sun
  88 # include <net/af.h>
  89 #endif
  90 #if __FreeBSD_version >= 300000
  91 # include <net/if_var.h>
  92 #endif
  93 #include <netinet/in.h>
  94 #ifdef __sgi
  95 # include <sys/ddi.h>
  96 # ifdef IFF_DRVRLOCK /* IRIX6 */
  97 #  include <sys/hashing.h>
  98 # endif
  99 #endif
 100 #if !defined(__hpux) && !defined(linux) && \
 101     !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /*IRIX<6*/
 102 # include <netinet/in_var.h>
 103 #endif
 104 #include <netinet/in_systm.h>
 105 #include <netinet/ip.h>
 106 #include <netinet/tcp.h>
 107 #include <netinet/udp.h>
 108 #include <netinet/ip_icmp.h>
 109 #ifdef USE_INET6
 110 # include <netinet/icmp6.h>
 111 #endif
 112 #if !defined(linux)
 113 # include <netinet/ip_var.h>
 114 #endif
 115 #ifndef _KERNEL
 116 # include <syslog.h>
 117 #endif
 118 #include "netinet/ip_compat.h"
 119 #include <netinet/tcpip.h>
 120 #include "netinet/ip_fil.h"
 121 #include "netinet/ip_nat.h"
 122 #include "netinet/ip_frag.h"
 123 #include "netinet/ip_state.h"
 124 #include "netinet/ip_auth.h"
 125 #if (__FreeBSD_version >= 300000) || defined(__NetBSD__)
 126 # include <sys/malloc.h>
 127 #endif
 128 /* END OF INCLUDES */
 129
 130 #ifdef  IPFILTER_LOG
 131
 132 # if defined(IPL_SELECT)
 133 #  include      <machine/sys/user.h>
 134 #  include      <sys/kthread_iface.h>
 135 #  define       READ_COLLISION  0x001
 136 extern int selwait;
 137 # endif /* IPL_SELECT */
 138
 139 typedef struct ipf_log_softc_s {
 140         ipfmutex_t      ipl_mutex[IPL_LOGSIZE];
 141 # if SOLARIS && defined(_KERNEL)
 142         kcondvar_t      ipl_wait[IPL_LOGSIZE];
 143 # endif
 144 # if defined(linux) && defined(_KERNEL)
 145         wait_queue_head_t       iplh_linux[IPL_LOGSIZE];
 146 # endif
 147 # if defined(__hpux) && defined(_KERNEL)
 148         iplog_select_t  ipl_ss[IPL_LOGSIZE];
 149 # endif
 150         iplog_t         **iplh[IPL_LOGSIZE];
 151         iplog_t         *iplt[IPL_LOGSIZE];
 152         iplog_t         *ipll[IPL_LOGSIZE];
 153         u_long          ipl_logfail[IPL_LOGSIZE];
 154         u_long          ipl_logok[IPL_LOGSIZE];
 155         fr_info_t       ipl_crc[IPL_LOGSIZE];
 156         u_32_t          ipl_counter[IPL_LOGSIZE];
 157         int             ipl_suppress;
 158         int             ipl_logall;
 159         int             ipl_log_init;
 160         int             ipl_logsize;
 161         int             ipl_used[IPL_LOGSIZE];
 162         int             ipl_magic[IPL_LOGSIZE];
 163         ipftuneable_t   *ipf_log_tune;
 164         int             ipl_readers[IPL_LOGSIZE];
 165 } ipf_log_softc_t;
 166
 167 static int magic[IPL_LOGSIZE] = { IPL_MAGIC, IPL_MAGIC_NAT, IPL_MAGIC_STATE,
 168                                   IPL_MAGIC, IPL_MAGIC, IPL_MAGIC,
 169                                   IPL_MAGIC, IPL_MAGIC };
 170
 171 static ipftuneable_t ipf_log_tuneables[] = {
 172         /* log */
 173         { { (void *)offsetof(ipf_log_softc_t, ipl_suppress) },
 174                 "log_suppress",         0,      1,
 175                 stsizeof(ipf_log_softc_t, ipl_suppress),
 176                 0,                      NULL,   NULL },
 177         { { (void *)offsetof(ipf_log_softc_t, ipl_logall) },
 178                 "log_all",              0,      1,
 179                 stsizeof(ipf_log_softc_t, ipl_logall),
 180                 0,                      NULL,   NULL },
 181         { { (void *)offsetof(ipf_log_softc_t, ipl_logsize) },
 182                 "log_size",             0,      0x80000,
 183                 stsizeof(ipf_log_softc_t, ipl_logsize),
 184                 0,                      NULL,   NULL },
 185         { { NULL },             NULL,                   0,      0,
 186                 0,
 187                 0,                      NULL,   NULL }
 188 };
 189
 190
 191 int
 192 ipf_log_main_load()
 193 {
 194         return 0;
 195 }
 196
 197
 198 int
 199 ipf_log_main_unload()
 200 {
 201         return 0;
 202 }
 203
 204 /* ------------------------------------------------------------------------ */
 205 /* Function:    ipf_log_soft_create                                         */
 206 /* Returns:     void * - NULL = failure, else pointer to log context data   */
 207 /* Parameters:  softc(I) - pointer to soft context main structure           */
 208 /*                                                                          */
 209 /* Initialise log buffers & pointers.  Also iniialised the CRC to a local   */
 210 /* secret for use in calculating the "last log checksum".                   */
 211 /* ------------------------------------------------------------------------ */
 212 void *
 213 ipf_log_soft_create(softc)
 214         ipf_main_softc_t *softc;
 215 {
 216         ipf_log_softc_t *softl;
 217         int i;
 218
 219         KMALLOC(softl, ipf_log_softc_t *);
 220         if (softl == NULL)
 221                 return NULL;
 222
 223         bzero((char *)softl, sizeof(*softl));
 224         bcopy((char *)magic, (char *)softl->ipl_magic, sizeof(magic));
 225
 226         softl->ipf_log_tune = ipf_tune_array_copy(softl,
 227                                                   sizeof(ipf_log_tuneables),
 228                                                   ipf_log_tuneables);
 229         if (softl->ipf_log_tune == NULL) {
 230                 ipf_log_soft_destroy(softc, softl);
 231                 return NULL;
 232         }
 233         if (ipf_tune_array_link(softc, softl->ipf_log_tune) == -1) {
 234                 ipf_log_soft_destroy(softc, softl);
 235                 return NULL;
 236         }
 237
 238         for (i = IPL_LOGMAX; i >= 0; i--) {
 239                 MUTEX_INIT(&softl->ipl_mutex[i], "ipf log mutex");
 240         }
 241
 242         softl->ipl_suppress = 1;
 243         softl->ipl_logall = 0;
 244         softl->ipl_log_init = 0;
 245         softl->ipl_logsize = IPFILTER_LOGSIZE;
 246
 247         return softl;
 248 }
 249
 250 /* ------------------------------------------------------------------------ */
 251 /* Function:    ipf_log_soft_init                                           */
 252 /* Returns:     int - 0 == success (always returned)                        */
 253 /* Parameters:  softc(I) - pointer to soft context main structure           */
 254 /*                                                                          */
 255 /* Initialise log buffers & pointers.  Also iniialised the CRC to a local   */
 256 /* secret for use in calculating the "last log checksum".                   */
 257 /* ------------------------------------------------------------------------ */
 258 int
 259 ipf_log_soft_init(softc, arg)
 260         ipf_main_softc_t *softc;
 261         void *arg;
 262 {
 263         ipf_log_softc_t *softl = arg;
 264         int i;
 265
 266         for (i = IPL_LOGMAX; i >= 0; i--) {
 267                 softl->iplt[i] = NULL;
 268                 softl->ipll[i] = NULL;
 269                 softl->iplh[i] = &softl->iplt[i];
 270                 bzero((char *)&softl->ipl_crc[i], sizeof(softl->ipl_crc[i]));
 271 # ifdef IPL_SELECT
 272                 softl->iplog_ss[i].read_waiter = 0;
 273                 softl->iplog_ss[i].state = 0;
 274 # endif
 275         }
 276
 277
 278         softl->ipl_log_init = 1;
 279
 280         return 0;
 281 }
 282
 283
 284 /* ------------------------------------------------------------------------ */
 285 /* Function:    ipf_log_soft_fini                                           */
 286 /* Parameters:  softc(I) - pointer to soft context main structure           */
 287 /*              arg(I)   - pointer to log context structure                 */
 288 /*                                                                          */
 289 /* Clean up any log data that has accumulated without being read.           */
 290 /* ------------------------------------------------------------------------ */
 291 int
 292 ipf_log_soft_fini(softc, arg)
 293         ipf_main_softc_t *softc;
 294         void *arg;
 295 {
 296         ipf_log_softc_t *softl = arg;
 297         int i;
 298
 299         if (softl->ipl_log_init == 0)
 300                 return 0;
 301
 302         softl->ipl_log_init = 0;
 303
 304         for (i = IPL_LOGMAX; i >= 0; i--) {
 305                 (void) ipf_log_clear(softc, i);
 306
 307                 /*
 308                  * This is a busy-wait loop so as to avoid yet another lock
 309                  * to wait on.
 310                  */
 311                 MUTEX_ENTER(&softl->ipl_mutex[i]);
 312                 while (softl->ipl_readers[i] > 0) {
 313 # if SOLARIS && defined(_KERNEL)
 314                         cv_broadcast(&softl->ipl_wait[i]);
 315                         MUTEX_EXIT(&softl->ipl_mutex[i]);
 316                         delay(100);
 317                         pollwakeup(&softc->ipf_poll_head[i], POLLRDNORM);
 318 # else
 319                         MUTEX_EXIT(&softl->ipl_mutex[i]);
 320                         WAKEUP(softl->iplh, i);
 321                         POLLWAKEUP(i);
 322 # endif
 323                         MUTEX_ENTER(&softl->ipl_mutex[i]);
 324                 }
 325                 MUTEX_EXIT(&softl->ipl_mutex[i]);
 326         }
 327
 328         return 0;
 329 }
 330
 331
 332 /* ------------------------------------------------------------------------ */
 333 /* Function:    ipf_log_soft_destroy                                        */
 334 /* Parameters:  softc(I) - pointer to soft context main structure           */
 335 /*              arg(I)   - pointer to log context structure                 */
 336 /*                                                                          */
 337 /* When this function is called, it is expected that there are no longer    */
 338 /* any threads active in the reading code path or the logging code path.    */
 339 /* ------------------------------------------------------------------------ */
 340 void
 341 ipf_log_soft_destroy(softc, arg)
 342         ipf_main_softc_t *softc;
 343         void *arg;
 344 {
 345         ipf_log_softc_t *softl = arg;
 346         int i;
 347
 348         for (i = IPL_LOGMAX; i >= 0; i--) {
 349 # if SOLARIS && defined(_KERNEL)
 350                 cv_destroy(&softl->ipl_wait[i]);
 351 # endif
 352                 MUTEX_DESTROY(&softl->ipl_mutex[i]);
 353         }
 354
 355         if (softl->ipf_log_tune != NULL) {
 356                 ipf_tune_array_unlink(softc, softl->ipf_log_tune);
 357                 KFREES(softl->ipf_log_tune, sizeof(ipf_log_tuneables));
 358                 softl->ipf_log_tune = NULL;
 359         }
 360
 361         KFREE(softl);
 362 }
 363
 364
 365 /* ------------------------------------------------------------------------ */
 366 /* Function:    ipf_log_pkt                                                 */
 367 /* Returns:     int      - 0 == success, -1 == failure                      */
 368 /* Parameters:  fin(I)   - pointer to packet information                    */
 369 /*              flags(I) - flags from filter rules                          */
 370 /*                                                                          */
 371 /* Create a log record for a packet given that it has been triggered by a   */
 372 /* rule (or the default setting).  Calculate the transport protocol header  */
 373 /* size using predetermined size of a couple of popular protocols and thus  */
 374 /* how much data to copy into the log, including part of the data body if   */
 375 /* requested.                                                               */
 376 /* ------------------------------------------------------------------------ */
 377 int
 378 ipf_log_pkt(fin, flags)
 379         fr_info_t *fin;
 380         u_int flags;
 381 {
 382         ipf_main_softc_t *softc = fin->fin_main_soft;
 383         ipf_log_softc_t *softl = softc->ipf_log_soft;
 384         register size_t hlen;
 385         int types[2], mlen;
 386         size_t sizes[2];
 387         void *ptrs[2];
 388         ipflog_t ipfl;
 389         u_char p;
 390         mb_t *m;
 391 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL) && !defined(FW_HOOKS)
 392         qif_t *ifp;
 393 # else
 394         struct ifnet *ifp;
 395 # endif /* SOLARIS || __hpux */
 396
 397         m = fin->fin_m;
 398         if (m == NULL)
 399                 return -1;
 400
 401         ipfl.fl_nattag.ipt_num[0] = 0;
 402         ifp = fin->fin_ifp;
 403         hlen = (char *)fin->fin_dp - (char *)fin->fin_ip;
 404
 405         /*
 406          * calculate header size.
 407          */
 408         if (fin->fin_off == 0) {
 409                 p = fin->fin_fi.fi_p;
 410                 if (p == IPPROTO_TCP)
 411                         hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
 412                 else if (p == IPPROTO_UDP)
 413                         hlen += MIN(sizeof(udphdr_t), fin->fin_dlen);
 414                 else if (p == IPPROTO_ICMP) {
 415                         struct icmp *icmp;
 416
 417                         icmp = (struct icmp *)fin->fin_dp;
 418
 419                         /*
 420                          * For ICMP, if the packet is an error packet, also
 421                          * include the information about the packet which
 422                          * caused the error.
 423                          */
 424                         switch (icmp->icmp_type)
 425                         {
 426                         case ICMP_UNREACH :
 427                         case ICMP_SOURCEQUENCH :
 428                         case ICMP_REDIRECT :
 429                         case ICMP_TIMXCEED :
 430                         case ICMP_PARAMPROB :
 431                                 hlen += MIN(sizeof(struct icmp) + 8,
 432                                             fin->fin_dlen);
 433                                 break;
 434                         default :
 435                                 hlen += MIN(sizeof(struct icmp),
 436                                             fin->fin_dlen);
 437                                 break;
 438                         }
 439                 }
 440 # ifdef USE_INET6
 441                 else if (p == IPPROTO_ICMPV6) {
 442                         struct icmp6_hdr *icmp;
 443
 444                         icmp = (struct icmp6_hdr *)fin->fin_dp;
 445
 446                         /*
 447                          * For ICMPV6, if the packet is an error packet, also
 448                          * include the information about the packet which
 449                          * caused the error.
 450                          */
 451                         if (icmp->icmp6_type < 128) {
 452                                 hlen += MIN(sizeof(struct icmp6_hdr) + 8,
 453                                             fin->fin_dlen);
 454                         } else {
 455                                 hlen += MIN(sizeof(struct icmp6_hdr),
 456                                             fin->fin_dlen);
 457                         }
 458                 }
 459 # endif
 460         }
 461         /*
 462          * Get the interface number and name to which this packet is
 463          * currently associated.
 464          */
 465 # if (SOLARIS || defined(__hpux)) && defined(_KERNEL)
 466 #  if !defined(FW_HOOKS)
 467         ipfl.fl_unit = (u_int)ifp->qf_ppa;
 468 #  endif
 469         COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
 470 # else
 471 #  if (defined(NetBSD) && (NetBSD  <= 1991011) && (NetBSD >= 199603)) || \
 472       OPENBSD_GE_REV(199603) || defined(linux) || FREEBSD_GE_REV(501113)
 473         COPYIFNAME(fin->fin_v, ifp, ipfl.fl_ifname);
 474 #  else
 475         ipfl.fl_unit = (u_int)ifp->if_unit;
 476 #   if defined(_KERNEL)
 477         if ((ipfl.fl_ifname[0] = ifp->if_name[0]))
 478                 if ((ipfl.fl_ifname[1] = ifp->if_name[1]))
 479                         if ((ipfl.fl_ifname[2] = ifp->if_name[2]))
 480                                 ipfl.fl_ifname[3] = ifp->if_name[3];
 481 #   else
 482         (void) strncpy(ipfl.fl_ifname, IFNAME(ifp), sizeof(ipfl.fl_ifname));
 483         ipfl.fl_ifname[sizeof(ipfl.fl_ifname) - 1] = '\0';
 484 #   endif
 485 #  endif
 486 # endif /* __hpux || SOLARIS */
 487         mlen = fin->fin_plen - hlen;
 488         if (!softl->ipl_logall) {
 489                 mlen = (flags & FR_LOGBODY) ? MIN(mlen, 128) : 0;
 490         } else if ((flags & FR_LOGBODY) == 0) {
 491                 mlen = 0;
 492         }
 493         if (mlen < 0)
 494                 mlen = 0;
 495         ipfl.fl_plen = (u_char)mlen;
 496         ipfl.fl_hlen = (u_char)hlen;
 497         ipfl.fl_rule = fin->fin_rule;
 498         (void) strncpy(ipfl.fl_group, fin->fin_group, FR_GROUPLEN);
 499         if (fin->fin_fr != NULL) {
 500                 ipfl.fl_loglevel = fin->fin_fr->fr_loglevel;
 501                 ipfl.fl_logtag = fin->fin_fr->fr_logtag;
 502         } else {
 503                 ipfl.fl_loglevel = 0xffff;
 504                 ipfl.fl_logtag = FR_NOLOGTAG;
 505         }
 506         if (fin->fin_nattag != NULL)
 507                 bcopy(fin->fin_nattag, (void *)&ipfl.fl_nattag,
 508                       sizeof(ipfl.fl_nattag));
 509         ipfl.fl_flags = flags;
 510         ipfl.fl_breason = (fin->fin_reason & 0xff);
 511         ipfl.fl_dir = fin->fin_out;
 512         ipfl.fl_lflags = fin->fin_flx;
 513         ipfl.fl_family = fin->fin_family;
 514         ptrs[0] = (void *)&ipfl;
 515         sizes[0] = sizeof(ipfl);
 516         types[0] = 0;
 517 # if defined(MENTAT) && defined(_KERNEL)
 518         /*
 519          * Are we copied from the mblk or an aligned array ?
 520          */
 521         if (fin->fin_ip == (ip_t *)m->b_rptr) {
 522                 ptrs[1] = m;
 523                 sizes[1] = hlen + mlen;
 524                 types[1] = 1;
 525         } else {
 526                 ptrs[1] = fin->fin_ip;
 527                 sizes[1] = hlen + mlen;
 528                 types[1] = 0;
 529         }
 530 # else
 531         ptrs[1] = m;
 532         sizes[1] = hlen + mlen;
 533         types[1] = 1;
 534 # endif /* MENTAT */
 535         return ipf_log_items(softc, IPL_LOGIPF, fin, ptrs, sizes, types, 2);
 536 }
 537
 538
 539 /* ------------------------------------------------------------------------ */
 540 /* Function:    ipf_log_items                                               */
 541 /* Returns:     int       - 0 == success, -1 == failure                     */
 542 /* Parameters:  softc(I)  - pointer to main soft context                    */
 543 /*              unit(I)   - device we are reading from                      */
 544 /*              fin(I)    - pointer to packet information                   */
 545 /*              items(I)  - array of pointers to log data                   */
 546 /*              itemsz(I) - array of size of valid memory pointed to        */
 547 /*              types(I)  - type of data pointed to by items pointers       */
 548 /*              cnt(I)    - number of elements in arrays items/itemsz/types */
 549 /*                                                                          */
 550 /* Takes an array of parameters and constructs one record to include the    */
 551 /* miscellaneous packet information, as well as packet data, for reading    */
 552 /* from the log device.                                                     */
 553 /* ------------------------------------------------------------------------ */
 554 int
 555 ipf_log_items(softc, unit, fin, items, itemsz, types, cnt)
 556         ipf_main_softc_t *softc;
 557         int unit;
 558         fr_info_t *fin;
 559         void **items;
 560         size_t *itemsz;
 561         int *types, cnt;
 562 {
 563         ipf_log_softc_t *softl = softc->ipf_log_soft;
 564         caddr_t buf, ptr;
 565         iplog_t *ipl;
 566         size_t len;
 567         int i;
 568         SPL_INT(s);
 569
 570         /*
 571          * Get the total amount of data to be logged.
 572          */
 573         for (i = 0, len = sizeof(iplog_t); i < cnt; i++)
 574                 len += itemsz[i];
 575
 576         SPL_NET(s);
 577         MUTEX_ENTER(&softl->ipl_mutex[unit]);
 578         softl->ipl_counter[unit]++;
 579         /*
 580          * check that we have space to record this information and can
 581          * allocate that much.
 582          */
 583         if ((softl->ipl_used[unit] + len) > softl->ipl_logsize) {
 584                 softl->ipl_logfail[unit]++;
 585                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 586                 return -1;
 587         }
 588
 589         KMALLOCS(buf, caddr_t, len);
 590         if (buf == NULL) {
 591                 softl->ipl_logfail[unit]++;
 592                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 593                 return -1;
 594         }
 595         ipl = (iplog_t *)buf;
 596         ipl->ipl_magic = softl->ipl_magic[unit];
 597         ipl->ipl_count = 1;
 598         ipl->ipl_seqnum = softl->ipl_counter[unit];
 599         ipl->ipl_next = NULL;
 600         ipl->ipl_dsize = len;
 601 #ifdef _KERNEL
 602         GETKTIME(&ipl->ipl_sec);
 603 #else
 604         ipl->ipl_sec = 0;
 605         ipl->ipl_usec = 0;
 606 #endif
 607
 608         /*
 609          * Loop through all the items to be logged, copying each one to the
 610          * buffer.  Use bcopy for normal data or the mb_t copyout routine.
 611          */
 612         for (i = 0, ptr = buf + sizeof(*ipl); i < cnt; i++) {
 613                 if (types[i] == 0) {
 614                         bcopy(items[i], ptr, itemsz[i]);
 615                 } else if (types[i] == 1) {
 616                         COPYDATA(items[i], 0, itemsz[i], ptr);
 617                 }
 618                 ptr += itemsz[i];
 619         }
 620         /*
 621          * Check to see if this log record has a CRC which matches the last
 622          * record logged.  If it does, just up the count on the previous one
 623          * rather than create a new one.
 624          */
 625         if (softl->ipl_suppress) {
 626                 if ((fin != NULL) && (fin->fin_off == 0)) {
 627                         if ((softl->ipll[unit] != NULL) &&
 628                             (fin->fin_crc == softl->ipl_crc[unit].fin_crc) &&
 629                             bcmp((char *)fin, (char *)&softl->ipl_crc[unit],
 630                                  FI_LCSIZE) == 0) {
 631                                 softl->ipll[unit]->ipl_count++;
 632                                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 633                                 SPL_X(s);
 634                                 KFREES(buf, len);
 635                                 return 0;
 636                         }
 637                         bcopy((char *)fin, (char *)&softl->ipl_crc[unit],
 638                               FI_LCSIZE);
 639                         softl->ipl_crc[unit].fin_crc = fin->fin_crc;
 640                 } else
 641                         bzero((char *)&softl->ipl_crc[unit], FI_CSIZE);
 642         }
 643
 644         /*
 645          * advance the log pointer to the next empty record and deduct the
 646          * amount of space we're going to use.
 647          */
 648         softl->ipl_logok[unit]++;
 649         softl->ipll[unit] = ipl;
 650         *softl->iplh[unit] = ipl;
 651         softl->iplh[unit] = &ipl->ipl_next;
 652         softl->ipl_used[unit] += len;
 653
 654         /*
 655          * Now that the log record has been completed and added to the queue,
 656          * wake up any listeners who may want to read it.
 657          */
 658 # if SOLARIS && defined(_KERNEL)
 659         cv_signal(&softl->ipl_wait[unit]);
 660         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 661         pollwakeup(&softc->ipf_poll_head[unit], POLLRDNORM);
 662 # else
 663         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 664         WAKEUP(softl->iplh, unit);
 665         POLLWAKEUP(unit);
 666 # endif
 667         SPL_X(s);
 668 # ifdef IPL_SELECT
 669         iplog_input_ready(unit);
 670 # endif
 671         return 0;
 672 }
 673
 674
 675 /* ------------------------------------------------------------------------ */
 676 /* Function:    ipf_log_read                                                */
 677 /* Returns:     int      - 0 == success, else error value.                  */
 678 /* Parameters:  softc(I) - pointer to main soft context                     */
 679 /*              unit(I)  - device we are reading from                       */
 680 /*              uio(O)   - pointer to information about where to store data */
 681 /*                                                                          */
 682 /* Called to handle a read on an IPFilter device.  Returns only complete    */
 683 /* log messages - will not partially copy a log record out to userland.     */
 684 /*                                                                          */
 685 /* NOTE: This function will block and wait for a signal to return data if   */
 686 /* there is none present.  Asynchronous I/O is not implemented.             */
 687 /* ------------------------------------------------------------------------ */
 688 int
 689 ipf_log_read(softc, unit, uio)
 690         ipf_main_softc_t *softc;
 691         minor_t unit;
 692         struct uio *uio;
 693 {
 694         ipf_log_softc_t *softl = softc->ipf_log_soft;
 695         size_t dlen, copied;
 696         int error = 0;
 697         iplog_t *ipl;
 698         SPL_INT(s);
 699
 700         if (softl->ipl_log_init == 0) {
 701                 IPFERROR(40007);
 702                 return 0;
 703         }
 704
 705         /*
 706          * Sanity checks.  Make sure the minor # is valid and we're copying
 707          * a valid chunk of data.
 708          */
 709         if (IPL_LOGMAX < unit) {
 710                 IPFERROR(40001);
 711                 return ENXIO;
 712         }
 713         if (uio->uio_resid == 0)
 714                 return 0;
 715
 716         if (uio->uio_resid < sizeof(iplog_t)) {
 717                 IPFERROR(40002);
 718                 return EINVAL;
 719         }
 720         if (uio->uio_resid > softl->ipl_logsize) {
 721                 IPFERROR(40005);
 722                 return EINVAL;
 723         }
 724
 725         /*
 726          * Lock the log so we can snapshot the variables.  Wait for a signal
 727          * if the log is empty.
 728          */
 729         SPL_NET(s);
 730         MUTEX_ENTER(&softl->ipl_mutex[unit]);
 731         softl->ipl_readers[unit]++;
 732
 733         while (softl->ipl_log_init == 1 && softl->iplt[unit] == NULL) {
 734 # if SOLARIS && defined(_KERNEL)
 735                 if (!cv_wait_sig(&softl->ipl_wait[unit],
 736                                  &softl->ipl_mutex[unit].ipf_lk)) {
 737                         softl->ipl_readers[unit]--;
 738                         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 739                         IPFERROR(40003);
 740                         return EINTR;
 741                 }
 742 # else
 743 #  if defined(__hpux) && defined(_KERNEL)
 744                 lock_t *l;
 745
 746 #   ifdef IPL_SELECT
 747                 if (uio->uio_fpflags & (FNBLOCK|FNDELAY)) {
 748                         /* this is no blocking system call */
 749                         softl->ipl_readers[unit]--;
 750                         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 751                         return 0;
 752                 }
 753 #   endif
 754
 755                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 756                 l = get_sleep_lock(&softl->iplh[unit]);
 757                 error = sleep(&softl->iplh[unit], PZERO+1);
 758                 spinunlock(l);
 759 #  else
 760 #   if defined(__osf__) && defined(_KERNEL)
 761                 error = mpsleep(&softl->iplh[unit], PSUSP|PCATCH,  "ipfread", 0,
 762                                 &softl->ipl_mutex, MS_LOCK_SIMPLE);
 763 #   else
 764                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 765                 SPL_X(s);
 766                 error = SLEEP(unit + softl->iplh, "ipl sleep");
 767 #   endif /* __osf__ */
 768 #  endif /* __hpux */
 769                 SPL_NET(s);
 770                 MUTEX_ENTER(&softl->ipl_mutex[unit]);
 771                 if (error) {
 772                         softl->ipl_readers[unit]--;
 773                         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 774                         IPFERROR(40004);
 775                         return error;
 776                 }
 777 # endif /* SOLARIS */
 778         }
 779         if (softl->ipl_log_init != 1) {
 780                 softl->ipl_readers[unit]--;
 781                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 782                 IPFERROR(40008);
 783                 return EIO;
 784         }
 785
 786 # if (defined(BSD) && (BSD >= 199101)) || defined(__FreeBSD__) || \
 787      defined(__osf__)
 788         uio->uio_rw = UIO_READ;
 789 # endif
 790
 791         for (copied = 0; (ipl = softl->iplt[unit]) != NULL; copied += dlen) {
 792                 dlen = ipl->ipl_dsize;
 793                 if (dlen > uio->uio_resid)
 794                         break;
 795                 /*
 796                  * Don't hold the mutex over the uiomove call.
 797                  */
 798                 softl->iplt[unit] = ipl->ipl_next;
 799                 softl->ipl_used[unit] -= dlen;
 800                 MUTEX_EXIT(&softl->ipl_mutex[unit]);
 801                 SPL_X(s);
 802                 error = UIOMOVE(ipl, dlen, UIO_READ, uio);
 803                 if (error) {
 804                         SPL_NET(s);
 805                         MUTEX_ENTER(&softl->ipl_mutex[unit]);
 806                         IPFERROR(40006);
 807                         ipl->ipl_next = softl->iplt[unit];
 808                         softl->iplt[unit] = ipl;
 809                         softl->ipl_used[unit] += dlen;
 810                         break;
 811                 }
 812                 MUTEX_ENTER(&softl->ipl_mutex[unit]);
 813                 KFREES((caddr_t)ipl, dlen);
 814                 SPL_NET(s);
 815         }
 816         if (!softl->iplt[unit]) {
 817                 softl->ipl_used[unit] = 0;
 818                 softl->iplh[unit] = &softl->iplt[unit];
 819                 softl->ipll[unit] = NULL;
 820         }
 821
 822         softl->ipl_readers[unit]--;
 823         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 824         SPL_X(s);
 825         return error;
 826 }
 827
 828
 829 /* ------------------------------------------------------------------------ */
 830 /* Function:    ipf_log_clear                                               */
 831 /* Returns:     int      - number of log bytes cleared.                     */
 832 /* Parameters:  softc(I) - pointer to main soft context                     */
 833 /*              unit(I)  - device we are reading from                       */
 834 /*                                                                          */
 835 /* Deletes all queued up log records for a given output device.             */
 836 /* ------------------------------------------------------------------------ */
 837 int
 838 ipf_log_clear(softc, unit)
 839         ipf_main_softc_t *softc;
 840         minor_t unit;
 841 {
 842         ipf_log_softc_t *softl = softc->ipf_log_soft;
 843         iplog_t *ipl;
 844         int used;
 845         SPL_INT(s);
 846
 847         SPL_NET(s);
 848         MUTEX_ENTER(&softl->ipl_mutex[unit]);
 849         while ((ipl = softl->iplt[unit]) != NULL) {
 850                 softl->iplt[unit] = ipl->ipl_next;
 851                 KFREES((caddr_t)ipl, ipl->ipl_dsize);
 852         }
 853         softl->iplh[unit] = &softl->iplt[unit];
 854         softl->ipll[unit] = NULL;
 855         used = softl->ipl_used[unit];
 856         softl->ipl_used[unit] = 0;
 857         bzero((char *)&softl->ipl_crc[unit], FI_CSIZE);
 858         MUTEX_EXIT(&softl->ipl_mutex[unit]);
 859         SPL_X(s);
 860         return used;
 861 }
 862
 863
 864 /* ------------------------------------------------------------------------ */
 865 /* Function:    ipf_log_canread                                             */
 866 /* Returns:     int      - 0 == no data to read, 1 = data present           */
 867 /* Parameters:  softc(I) - pointer to main soft context                     */
 868 /*              unit(I)  - device we are reading from                       */
 869 /*                                                                          */
 870 /* Returns an indication of whether or not there is data present in the     */
 871 /* current buffer for the selected ipf device.                              */
 872 /* ------------------------------------------------------------------------ */
 873 int
 874 ipf_log_canread(softc, unit)
 875         ipf_main_softc_t *softc;
 876         int unit;
 877 {
 878         ipf_log_softc_t *softl = softc->ipf_log_soft;
 879
 880         return softl->iplt[unit] != NULL;
 881 }
 882
 883
 884 /* ------------------------------------------------------------------------ */
 885 /* Function:    ipf_log_canread                                             */
 886 /* Returns:     int      - 0 == no data to read, 1 = data present           */
 887 /* Parameters:  softc(I) - pointer to main soft context                     */
 888 /*              unit(I)  - device we are reading from                       */
 889 /*                                                                          */
 890 /* Returns how many bytes are currently held in log buffers for the         */
 891 /* selected ipf device.                                                     */
 892 /* ------------------------------------------------------------------------ */
 893 int
 894 ipf_log_bytesused(softc, unit)
 895         ipf_main_softc_t *softc;
 896         int unit;
 897 {
 898         ipf_log_softc_t *softl = softc->ipf_log_soft;
 899
 900         if (softl == NULL)
 901                 return 0;
 902
 903         return softl->ipl_used[unit];
 904 }
 905
 906
 907 /* ------------------------------------------------------------------------ */
 908 /* Function:    ipf_log_failures                                            */
 909 /* Returns:     U_QUAD_T - number of log failures                           */
 910 /* Parameters:  softc(I) - pointer to main soft context                     */
 911 /*              unit(I)  - device we are reading from                       */
 912 /*                                                                          */
 913 /* Returns how many times we've tried to log a packet but failed to do so   */
 914 /* for the selected ipf device.                                             */
 915 /* ------------------------------------------------------------------------ */
 916 u_long
 917 ipf_log_failures(softc, unit)
 918         ipf_main_softc_t *softc;
 919         int unit;
 920 {
 921         ipf_log_softc_t *softl = softc->ipf_log_soft;
 922
 923         if (softl == NULL)
 924                 return 0;
 925
 926         return softl->ipl_logfail[unit];
 927 }
 928
 929
 930 /* ------------------------------------------------------------------------ */
 931 /* Function:    ipf_log_logok                                               */
 932 /* Returns:     U_QUAD_T - number of packets logged                         */
 933 /* Parameters:  softc(I) - pointer to main soft context                     */
 934 /*              unit(I)  - device we are reading from                       */
 935 /*                                                                          */
 936 /* Returns how many times we've successfully logged a packet for the        */
 937 /* selected ipf device.                                                     */
 938 /* ------------------------------------------------------------------------ */
 939 u_long
 940 ipf_log_logok(softc, unit)
 941         ipf_main_softc_t *softc;
 942         int unit;
 943 {
 944         ipf_log_softc_t *softl = softc->ipf_log_soft;
 945
 946         if (softl == NULL)
 947                 return 0;
 948
 949         return softl->ipl_logok[unit];
 950 }
 951 #endif /* IPFILTER_LOG */