src/main/detail.c

   1 /*
   2  * detail.c     Process the detail file
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2007  The FreeRADIUS server project
  21  * Copyright 2007  Alan DeKok <aland@deployingradius.com>
  22  */
  23
  24 RCSID("$Id$")
  25
  26 #include <freeradius-devel/radiusd.h>
  27 #include <freeradius-devel/modules.h>
  28 #include <freeradius-devel/detail.h>
  29 #include <freeradius-devel/process.h>
  30 #include <freeradius-devel/rad_assert.h>
  31
  32 #ifdef HAVE_SYS_STAT_H
  33 #include <sys/stat.h>
  34 #endif
  35
  36 #ifdef HAVE_GLOB_H
  37 #include <glob.h>
  38 #endif
  39
  40 #include <fcntl.h>
  41
  42 #ifdef WITH_DETAIL
  43
  44 #define USEC (1000000)
  45
  46 static FR_NAME_NUMBER state_names[] = {
  47         { "unopened", STATE_UNOPENED },
  48         { "unlocked", STATE_UNLOCKED },
  49         { "header", STATE_HEADER },
  50         { "reading", STATE_READING },
  51         { "queued", STATE_QUEUED },
  52         { "running", STATE_RUNNING },
  53         { "no-reply", STATE_NO_REPLY },
  54         { "replied", STATE_REPLIED },
  55
  56         { NULL, 0 }
  57 };
  58
  59 /*
  60  *      If we're limiting outstanding packets, then mark the response
  61  *      as being sent.
  62  */
  63 int detail_send(rad_listen_t *listener, REQUEST *request)
  64 {
  65         int rtt;
  66         struct timeval now;
  67         listen_detail_t *data = listener->data;
  68
  69         rad_assert(request->listener == listener);
  70         rad_assert(listener->send == detail_send);
  71
  72         /*
  73          *      This request timed out.  Remember that, and tell the
  74          *      caller it's OK to read more "detail" file stuff.
  75          */
  76         if (request->reply->code == 0) {
  77                 data->delay_time = data->retry_interval * USEC;
  78                 data->signal = 1;
  79                 data->state = STATE_NO_REPLY;
  80
  81                 RDEBUG("Detail - No response configured for request %d.  Will retry in %d seconds",
  82                        request->number, data->retry_interval);
  83
  84                 radius_signal_self(RADIUS_SIGNAL_SELF_DETAIL);
  85                 return 0;
  86         }
  87
  88         /*
  89          *      We call gettimeofday a lot.  But it should be OK,
  90          *      because there's nothing else to do.
  91          */
  92         gettimeofday(&now, NULL);
  93
  94         /*
  95          *      If we haven't sent a packet in the last second, reset
  96          *      the RTT.
  97          */
  98         now.tv_sec -= 1;
  99         if (timercmp(&data->last_packet, &now, <)) {
 100                 data->has_rtt = FALSE;
 101         }
 102         now.tv_sec += 1;
 103
 104         /*
 105          *      Only one detail packet may be outstanding at a time,
 106          *      so it's safe to update some entries in the detail
 107          *      structure.
 108          *
 109          *      We keep smoothed round trip time (SRTT), but not round
 110          *      trip timeout (RTO).  We use SRTT to calculate a rough
 111          *      load factor.
 112          */
 113         rtt = now.tv_sec - request->packet->timestamp.tv_sec;
 114         rtt *= USEC;
 115         rtt += now.tv_usec;
 116         rtt -= request->packet->timestamp.tv_usec;
 117
 118         /*
 119          *      If we're proxying, the RTT is our processing time,
 120          *      plus the network delay there and back, plus the time
 121          *      on the other end to process the packet.  Ideally, we
 122          *      should remove the network delays from the RTT, but we
 123          *      don't know what they are.
 124          *
 125          *      So, to be safe, we over-estimate the total cost of
 126          *      processing the packet.
 127          */
 128         if (!data->has_rtt) {
 129                 data->has_rtt = TRUE;
 130                 data->srtt = rtt;
 131                 data->rttvar = rtt / 2;
 132
 133         } else {
 134                 data->rttvar -= data->rttvar >> 2;
 135                 data->rttvar += (data->srtt - rtt);
 136                 data->srtt -= data->srtt >> 3;
 137                 data->srtt += rtt >> 3;
 138         }
 139
 140         /*
 141          *      Calculate the time we wait before sending the next
 142          *      packet.
 143          *
 144          *      rtt / (rtt + delay) = load_factor / 100
 145          */
 146         data->delay_time = (data->srtt * (100 - data->load_factor)) / (data->load_factor);
 147
 148         /*
 149          *      Cap delay at 4 packets/s.  If the end system can't
 150          *      handle this, then it's very broken.
 151          */
 152         if (data->delay_time > (USEC / 4)) data->delay_time= USEC / 4;
 153
 154         RDEBUG3("Received response for request %d.  Will read the next packet in %d seconds",
 155                 request->number, data->delay_time / USEC);
 156
 157         data->last_packet = now;
 158         data->signal = 1;
 159         data->state = STATE_REPLIED;
 160         data->counter++;
 161         radius_signal_self(RADIUS_SIGNAL_SELF_DETAIL);
 162
 163         return 0;
 164 }
 165
 166
 167 /*
 168  *      Open the detail file, if we can.
 169  *
 170  *      FIXME: create it, if it's not already there, so that the main
 171  *      server select() will wake us up if there's anything to read.
 172  */
 173 static int detail_open(rad_listen_t *this)
 174 {
 175         struct stat st;
 176         listen_detail_t *data = this->data;
 177         char *filename = data->filename;
 178
 179         rad_assert(data->state == STATE_UNOPENED);
 180         data->delay_time = USEC;
 181
 182         /*
 183          *      Open detail.work first, so we don't lose
 184          *      accounting packets.  It's probably better to
 185          *      duplicate them than to lose them.
 186          *
 187          *      Note that we're not writing to the file, but
 188          *      we've got to open it for writing in order to
 189          *      establish the lock, to prevent rlm_detail from
 190          *      writing to it.
 191          *
 192          *      This also means that if we're doing globbing,
 193          *      this file will be read && processed before the
 194          *      file globbing is done.
 195          */
 196         this->fd = open(data->filename_work, O_RDWR);
 197         if (this->fd < 0) {
 198                 DEBUG2("Polling for detail file %s", filename);
 199
 200                 /*
 201                  *      Try reading the detail file.  If it
 202                  *      doesn't exist, we can't do anything.
 203                  *
 204                  *      Doing the stat will tell us if the file
 205                  *      exists, even if we don't have permissions
 206                  *      to read it.
 207                  */
 208                 if (stat(filename, &st) < 0) {
 209 #ifdef HAVE_GLOB_H
 210                         unsigned int i;
 211                         int found;
 212                         time_t chtime;
 213                         glob_t files;
 214
 215                         memset(&files, 0, sizeof(files));
 216                         if (glob(filename, 0, NULL, &files) != 0) {
 217                                 globfree(&files);
 218                                 return 0;
 219                         }
 220
 221                         chtime = 0;
 222                         found = -1;
 223                         for (i = 0; i < files.gl_pathc; i++) {
 224                                 if (stat(files.gl_pathv[i], &st) < 0) continue;
 225
 226                                 if ((i == 0) ||
 227                                     (st.st_ctime < chtime)) {
 228                                         chtime = st.st_ctime;
 229                                         found = i;
 230                                 }
 231                         }
 232
 233                         if (found < 0) {
 234                                 globfree(&files);
 235                                 return 0;
 236                         }
 237
 238                         filename = strdup(files.gl_pathv[found]);
 239                         globfree(&files);
 240 #else
 241                         return 0;
 242 #endif
 243                 }
 244
 245                 /*
 246                  *      Open it BEFORE we rename it, just to
 247                  *      be safe...
 248                  */
 249                 this->fd = open(filename, O_RDWR);
 250                 if (this->fd < 0) {
 251                         radlog(L_ERR, "Detail - Failed to open %s: %s",
 252                                filename, strerror(errno));
 253                         if (filename != data->filename) free(filename);
 254                         return 0;
 255                 }
 256
 257                 /*
 258                  *      Rename detail to detail.work
 259                  */
 260                 DEBUG("Detail - Renaming %s -> %s", filename, data->filename_work);
 261                 if (rename(filename, data->filename_work) < 0) {
 262                         if (filename != data->filename) free(filename);
 263                         close(this->fd);
 264                         this->fd = -1;
 265                         return 0;
 266                 }
 267                 if (filename != data->filename) free(filename);
 268         } /* else detail.work existed, and we opened it */
 269
 270         rad_assert(data->vps == NULL);
 271         rad_assert(data->fp == NULL);
 272
 273         data->state = STATE_UNLOCKED;
 274
 275         data->client_ip.af = AF_UNSPEC;
 276         data->timestamp = 0;
 277         data->offset = 0;
 278         data->packets = 0;
 279         data->tries = 0;
 280
 281         return 1;
 282 }
 283
 284
 285 /*
 286  *      FIXME: add a configuration "exit when done" so that the detail
 287  *      file reader can be used as a one-off tool to update stuff.
 288  *
 289  *      The time sequence for reading from the detail file is:
 290  *
 291  *      t_0             signalled that the server is idle, and we
 292  *                      can read from the detail file.
 293  *
 294  *      t_rtt           the packet has been processed successfully,
 295  *                      wait for t_delay to enforce load factor.
 296  *
 297  *      t_rtt + t_delay wait for signal that the server is idle.
 298  *
 299  */
 300 int detail_recv(rad_listen_t *listener)
 301 {
 302         char            key[256], op[8], value[1024];
 303         VALUE_PAIR      *vp, **tail;
 304         RADIUS_PACKET   *packet;
 305         char            buffer[2048];
 306         listen_detail_t *data = listener->data;
 307         struct timeval  now;
 308
 309         /*
 310          *      We may be in the main thread.  It needs to update the
 311          *      timers before we try to read from the file again.
 312          */
 313         if (data->signal) return 0;
 314
 315         switch (data->state) {
 316                 case STATE_UNOPENED:
 317         open_file:
 318                         rad_assert(listener->fd < 0);
 319
 320                         if (!detail_open(listener)) return 0;
 321
 322                         rad_assert(data->state == STATE_UNLOCKED);
 323                         rad_assert(listener->fd >= 0);
 324
 325                         /* FALL-THROUGH */
 326
 327                         /*
 328                          *      Try to lock fd.  If we can't, return.
 329                          *      If we can, continue.  This means that
 330                          *      the server doesn't block while waiting
 331                          *      for the lock to open...
 332                          */
 333                 case STATE_UNLOCKED:
 334                         /*
 335                          *      Note that we do NOT block waiting for
 336                          *      the lock.  We've re-named the file
 337                          *      above, so we've already guaranteed
 338                          *      that any *new* detail writer will not
 339                          *      be opening this file.  The only
 340                          *      purpose of the lock is to catch a race
 341                          *      condition where the execution
 342                          *      "ping-pongs" between radiusd &
 343                          *      radrelay.
 344                          */
 345                         if (rad_lockfd_nonblock(listener->fd, 0) < 0) {
 346                                 /*
 347                                  *      Close the FD.  The main loop
 348                                  *      will wake up in a second and
 349                                  *      try again.
 350                                  */
 351                                 close(listener->fd);
 352                                 listener->fd = -1;
 353                                 data->state = STATE_UNOPENED;
 354                                 return 0;
 355                         }
 356
 357                         data->fp = fdopen(listener->fd, "r");
 358                         if (!data->fp) {
 359                                 radlog(L_ERR, "FATAL: Failed to re-open detail file %s: %s",
 360                                        data->filename, strerror(errno));
 361                                 exit(1);
 362                         }
 363
 364                         /*
 365                          *      Look for the header
 366                          */
 367                         data->state = STATE_HEADER;
 368                         data->delay_time = USEC;
 369                         data->vps = NULL;
 370
 371                         /* FALL-THROUGH */
 372
 373                 case STATE_HEADER:
 374                 do_header:
 375                         data->tries = 0;
 376                         if (!data->fp) {
 377                                 data->state = STATE_UNOPENED;
 378                                 goto open_file;
 379                         }
 380
 381                         {
 382                                 struct stat buf;
 383
 384                                 if (fstat(listener->fd, &buf) < 0) {
 385                                         radlog(L_ERR, "Failed to stat "
 386                                                "detail file %s: %s",
 387                                                 data->filename,
 388                                                 strerror(errno));
 389
 390                                         goto cleanup;
 391                                 }
 392                                 if (((off_t) ftell(data->fp)) == buf.st_size) {
 393                                         goto cleanup;
 394                                 }
 395                         }
 396
 397                         /*
 398                          *      End of file.  Delete it, and re-set
 399                          *      everything.
 400                          */
 401                         if (feof(data->fp)) {
 402                         cleanup:
 403                                 DEBUG("Detail - unlinking %s",
 404                                       data->filename_work);
 405                                 unlink(data->filename_work);
 406                                 if (data->fp) fclose(data->fp);
 407                                 data->fp = NULL;
 408                                 listener->fd = -1;
 409                                 data->state = STATE_UNOPENED;
 410                                 rad_assert(data->vps == NULL);
 411
 412                                 if (data->one_shot) {
 413                                         radlog(L_INFO, "Finished reading \"one shot\" detail file - Exiting");
 414                                         radius_signal_self(RADIUS_SIGNAL_SELF_EXIT);
 415                                 }
 416
 417                                 return 0;
 418                         }
 419
 420                         /*
 421                          *      Else go read something.
 422                          */
 423                         break;
 424
 425                         /*
 426                          *      Read more value-pair's, unless we're
 427                          *      at EOF.  In that case, queue whatever
 428                          *      we have.
 429                          */
 430                 case STATE_READING:
 431                         if (data->fp && !feof(data->fp)) break;
 432                         data->state = STATE_QUEUED;
 433
 434                         /* FALL-THROUGH */
 435
 436                 case STATE_QUEUED:
 437                         goto alloc_packet;
 438
 439                         /*
 440                          *      Periodically check what's going on.
 441                          *      If the request is taking too long,
 442                          *      retry it.
 443                          */
 444                 case STATE_RUNNING:
 445                         if (time(NULL) < (data->running + data->retry_interval)) {
 446                                 return 0;
 447                         }
 448
 449                         DEBUG("No response to detail request.  Retrying");
 450                         data->state = STATE_NO_REPLY;
 451                         /* FALL-THROUGH */
 452
 453                         /*
 454                          *      If there's no reply, keep
 455                          *      retransmitting the current packet
 456                          *      forever.
 457                          */
 458                 case STATE_NO_REPLY:
 459                         data->state = STATE_QUEUED;
 460                         goto alloc_packet;
 461
 462                         /*
 463                          *      We have a reply.  Clean up the old
 464                          *      request, and go read another one.
 465                          */
 466                 case STATE_REPLIED:
 467                         pairfree(&data->vps);
 468                         data->state = STATE_HEADER;
 469                         goto do_header;
 470         }
 471
 472         tail = &data->vps;
 473         while (*tail) tail = &(*tail)->next;
 474
 475         /*
 476          *      Read a header, OR a value-pair.
 477          */
 478         while (fgets(buffer, sizeof(buffer), data->fp)) {
 479                 data->offset = ftell(data->fp); /* for statistics */
 480
 481                 /*
 482                  *      Badly formatted file: delete it.
 483                  *
 484                  *      FIXME: Maybe flag an error?
 485                  */
 486                 if (!strchr(buffer, '\n')) {
 487                         pairfree(&data->vps);
 488                         goto cleanup;
 489                 }
 490
 491                 /*
 492                  *      We're reading VP's, and got a blank line.
 493                  *      Queue the packet.
 494                  */
 495                 if ((data->state == STATE_READING) &&
 496                     (buffer[0] == '\n')) {
 497                         data->state = STATE_QUEUED;
 498                         break;
 499                 }
 500
 501                 /*
 502                  *      Look for date/time header, and read VP's if
 503                  *      found.  If not, keep reading lines until we
 504                  *      find one.
 505                  */
 506                 if (data->state == STATE_HEADER) {
 507                         int y;
 508
 509                         if (sscanf(buffer, "%*s %*s %*d %*d:%*d:%*d %d", &y)) {
 510                                 data->state = STATE_READING;
 511                         }
 512                         continue;
 513                 }
 514
 515                 /*
 516                  *      We have a full "attribute = value" line.
 517                  *      If it doesn't look reasonable, skip it.
 518                  *
 519                  *      FIXME: print an error for badly formatted attributes?
 520                  */
 521                 if (sscanf(buffer, "%255s %8s %1023s", key, op, value) != 3) {
 522                         DEBUG2W("Skipping badly formatted line %s",
 523                                buffer);
 524                         continue;
 525                 }
 526
 527                 /*
 528                  *      Should be =, :=, +=, ...
 529                  */
 530                 if (!strchr(op, '=')) continue;
 531
 532                 /*
 533                  *      Skip non-protocol attributes.
 534                  */
 535                 if (!strcasecmp(key, "Request-Authenticator")) continue;
 536
 537                 /*
 538                  *      Set the original client IP address, based on
 539                  *      what's in the detail file.
 540                  *
 541                  *      Hmm... we don't set the server IP address.
 542                  *      or port.  Oh well.
 543                  */
 544                 if (!strcasecmp(key, "Client-IP-Address")) {
 545                         data->client_ip.af = AF_INET;
 546                         if (ip_hton(value, AF_INET, &data->client_ip) < 0) {
 547                                 radlog(L_ERR,
 548                                        "Failed parsing Client-IP-Address");
 549
 550                                 pairfree(&data->vps);
 551                                 goto cleanup;
 552                         }
 553                         continue;
 554                 }
 555
 556                 /*
 557                  *      The original time at which we received the
 558                  *      packet.  We need this to properly calculate
 559                  *      Acct-Delay-Time.
 560                  */
 561                 if (!strcasecmp(key, "Timestamp")) {
 562                         data->timestamp = atoi(value);
 563
 564                         vp = paircreate(data, PW_PACKET_ORIGINAL_TIMESTAMP, 0);
 565                         if (vp) {
 566                                 vp->vp_date = (uint32_t) data->timestamp;
 567                                 *tail = vp;
 568                                 tail = &(vp->next);
 569                         }
 570                         continue;
 571                 }
 572
 573                 /*
 574                  *      Read one VP.
 575                  *
 576                  *      FIXME: do we want to check for non-protocol
 577                  *      attributes like radsqlrelay does?
 578                  */
 579                 vp = NULL;
 580                 if ((userparse(data, buffer, &vp) > 0) &&
 581                     (vp != NULL)) {
 582                         *tail = vp;
 583                         tail = &(vp->next);
 584                 }
 585         }
 586
 587         /*
 588          *      Some kind of error.
 589          *
 590          *      FIXME: Leave the file in-place, and warn the
 591          *      administrator?
 592          */
 593         if (ferror(data->fp)) goto cleanup;
 594
 595         data->tries = 0;
 596         data->packets++;
 597
 598         /*
 599          *      Process the packet.
 600          */
 601  alloc_packet:
 602         data->tries++;
 603
 604         /*
 605          *      The writer doesn't check that the record was
 606          *      completely written.  If the disk is full, this can
 607          *      result in a truncated record.  When that happens,
 608          *      treat it as EOF.
 609          */
 610         if (data->state != STATE_QUEUED) {
 611                 radlog(L_ERR, "Truncated record: treating it as EOF for detail file %s", data->filename_work);
 612                 goto cleanup;
 613         }
 614
 615         /*
 616          *      We're done reading the file, but we didn't read
 617          *      anything.  Clean up, and don't return anything.
 618          */
 619         if (!data->vps) {
 620                 data->state = STATE_HEADER;
 621                 if (!data->fp || feof(data->fp)) goto cleanup;
 622                 return 0;
 623         }
 624
 625         /*
 626          *      Allocate the packet.  If we fail, it's a serious
 627          *      problem.
 628          */
 629         packet = rad_alloc(NULL, 1);
 630         if (!packet) {
 631                 radlog(L_ERR, "FATAL: Failed allocating memory for detail");
 632                 exit(1);
 633         }
 634
 635         memset(packet, 0, sizeof(*packet));
 636         packet->sockfd = -1;
 637         packet->src_ipaddr.af = AF_INET;
 638         packet->src_ipaddr.ipaddr.ip4addr.s_addr = htonl(INADDR_NONE);
 639         packet->code = PW_ACCOUNTING_REQUEST;
 640         gettimeofday(&packet->timestamp, NULL);
 641
 642         /*
 643          *      Remember where it came from, so that we don't
 644          *      proxy it to the place it came from...
 645          */
 646         if (data->client_ip.af != AF_UNSPEC) {
 647                 packet->src_ipaddr = data->client_ip;
 648         }
 649
 650         vp = pairfind(packet->vps, PW_PACKET_SRC_IP_ADDRESS, 0, TAG_ANY);
 651         if (vp) {
 652                 packet->src_ipaddr.af = AF_INET;
 653                 packet->src_ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
 654         } else {
 655                 vp = pairfind(packet->vps, PW_PACKET_SRC_IPV6_ADDRESS, 0, TAG_ANY);
 656                 if (vp) {
 657                         packet->src_ipaddr.af = AF_INET6;
 658                         memcpy(&packet->src_ipaddr.ipaddr.ip6addr,
 659                                &vp->vp_ipv6addr, sizeof(vp->vp_ipv6addr));
 660                 }
 661         }
 662
 663         vp = pairfind(packet->vps, PW_PACKET_DST_IP_ADDRESS, 0, TAG_ANY);
 664         if (vp) {
 665                 packet->dst_ipaddr.af = AF_INET;
 666                 packet->dst_ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
 667         } else {
 668                 vp = pairfind(packet->vps, PW_PACKET_DST_IPV6_ADDRESS, 0, TAG_ANY);
 669                 if (vp) {
 670                         packet->dst_ipaddr.af = AF_INET6;
 671                         memcpy(&packet->dst_ipaddr.ipaddr.ip6addr,
 672                                &vp->vp_ipv6addr, sizeof(vp->vp_ipv6addr));
 673                 }
 674         }
 675
 676         /*
 677          *      Generate packet ID, ports, IP via a counter.
 678          */
 679         packet->id = data->counter & 0xff;
 680         packet->src_port = 1024 + ((data->counter >> 8) & 0xff);
 681         packet->dst_port = 1024 + ((data->counter >> 16) & 0xff);
 682
 683         packet->dst_ipaddr.af = AF_INET;
 684         packet->dst_ipaddr.ipaddr.ip4addr.s_addr = htonl((INADDR_LOOPBACK & ~0xffffff) | ((data->counter >> 24) & 0xff));
 685
 686         /*
 687          *      If everything's OK, this is a waste of memory.
 688          *      Otherwise, it lets us re-send the original packet
 689          *      contents, unmolested.
 690          */
 691         packet->vps = paircopy(packet, data->vps);
 692
 693         /*
 694          *      Prefer the Event-Timestamp in the packet, if it
 695          *      exists.  That is when the event occurred, whereas the
 696          *      "Timestamp" field is when we wrote the packet to the
 697          *      detail file, which could have been much later.
 698          */
 699         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP, 0, TAG_ANY);
 700         if (vp) {
 701                 data->timestamp = vp->vp_integer;
 702         }
 703
 704         /*
 705          *      Look for Acct-Delay-Time, and update
 706          *      based on Acct-Delay-Time += (time(NULL) - timestamp)
 707          */
 708         vp = pairfind(packet->vps, PW_ACCT_DELAY_TIME, 0, TAG_ANY);
 709         if (!vp) {
 710                 vp = paircreate(packet, PW_ACCT_DELAY_TIME, 0);
 711                 rad_assert(vp != NULL);
 712                 pairadd(&packet->vps, vp);
 713         }
 714         if (data->timestamp != 0) {
 715                 vp->vp_integer += time(NULL) - data->timestamp;
 716         }
 717
 718         /*
 719          *      Set the transmission count.
 720          */
 721         vp = pairfind(packet->vps, PW_PACKET_TRANSMIT_COUNTER, 0, TAG_ANY);
 722         if (!vp) {
 723                 vp = paircreate(packet, PW_PACKET_TRANSMIT_COUNTER, 0);
 724                 rad_assert(vp != NULL);
 725                 pairadd(&packet->vps, vp);
 726         }
 727         vp->vp_integer = data->tries;
 728
 729         if (debug_flag) {
 730                 fr_printf_log("detail_recv: Read packet from %s\n", data->filename_work);
 731                 for (vp = packet->vps; vp; vp = vp->next) {
 732                         debug_pair(vp);
 733                 }
 734         }
 735
 736         /*
 737          *      Don't bother doing limit checks, etc.
 738          */
 739         gettimeofday(&now, NULL);
 740         if (!request_insert(listener, packet, &data->detail_client,
 741                             rad_accounting, &now)) {
 742                 rad_free(&packet);
 743                 data->state = STATE_NO_REPLY;   /* try again later */
 744                 return 0;
 745         }
 746
 747         data->state = STATE_RUNNING;
 748         data->running = packet->timestamp.tv_sec;
 749
 750         return 1;
 751 }
 752
 753
 754 /*
 755  *      Free detail-specific stuff.
 756  */
 757 void detail_free(rad_listen_t *this)
 758 {
 759         listen_detail_t *data = this->data;
 760
 761         talloc_free(data->filename);
 762         data->filename = NULL;
 763         pairfree(&data->vps);
 764
 765         if (data->fp != NULL) {
 766                 fclose(data->fp);
 767                 data->fp = NULL;
 768         }
 769 }
 770
 771
 772 int detail_print(const rad_listen_t *this, char *buffer, size_t bufsize)
 773 {
 774         if (!this->server) {
 775                 return snprintf(buffer, bufsize, "%s",
 776                                 ((listen_detail_t *)(this->data))->filename);
 777         }
 778
 779         return snprintf(buffer, bufsize, "detail file %s as server %s",
 780                         ((listen_detail_t *)(this->data))->filename,
 781                         this->server);
 782 }
 783
 784 /*
 785  *      Overloaded to return delay times.
 786  */
 787 int detail_encode(rad_listen_t *this, UNUSED REQUEST *request)
 788 {
 789         listen_detail_t *data = this->data;
 790
 791         /*
 792          *      We haven't sent a packet... delay things a bit.
 793          */
 794         if (!data->signal) {
 795                 int delay = (data->poll_interval - 1) * USEC;
 796
 797                 /*
 798                  *      Add +/- 0.25s of jitter
 799                  */
 800                 delay += (USEC * 3) / 4;
 801                 delay += fr_rand() % (USEC / 2);
 802
 803                 DEBUG2("Detail listener %s state %s signalled %d waiting %d.%06d sec",
 804                        data->filename,
 805                        fr_int2str(state_names, data->state, "?"), data->signal,
 806                        (delay / USEC), delay % USEC);
 807
 808                 return delay;
 809         }
 810
 811         data->signal = 0;
 812
 813         DEBUG2("Detail listener %s state %s signalled %d waiting %d.%06d sec",
 814                data->filename, fr_int2str(state_names, data->state, "?"),
 815                data->signal,
 816                data->delay_time / USEC,
 817                data->delay_time % USEC);
 818
 819         return data->delay_time;
 820 }
 821
 822
 823 /*
 824  *      Overloaded to return "should we fix delay times"
 825  */
 826 int detail_decode(rad_listen_t *this, UNUSED REQUEST *request)
 827 {
 828         listen_detail_t *data = this->data;
 829
 830         return data->signal;
 831 }
 832
 833
 834 static const CONF_PARSER detail_config[] = {
 835         { "filename",   PW_TYPE_STRING_PTR,
 836           offsetof(listen_detail_t, filename), NULL,  NULL },
 837         { "load_factor",   PW_TYPE_INTEGER,
 838           offsetof(listen_detail_t, load_factor), NULL, Stringify(10)},
 839         { "poll_interval",   PW_TYPE_INTEGER,
 840           offsetof(listen_detail_t, poll_interval), NULL, Stringify(1)},
 841         { "retry_interval",   PW_TYPE_INTEGER,
 842           offsetof(listen_detail_t, retry_interval), NULL, Stringify(30)},
 843         { "one_shot",   PW_TYPE_BOOLEAN,
 844           offsetof(listen_detail_t, one_shot), NULL, NULL},
 845         { "max_outstanding",   PW_TYPE_INTEGER,
 846           offsetof(listen_detail_t, load_factor), NULL, NULL},
 847
 848         { NULL, -1, 0, NULL, NULL }             /* end the list */
 849 };
 850
 851 extern int check_config;
 852
 853 /*
 854  *      Parse a detail section.
 855  */
 856 int detail_parse(CONF_SECTION *cs, rad_listen_t *this)
 857 {
 858         int             rcode;
 859         listen_detail_t *data;
 860         RADCLIENT       *client;
 861         char buffer[2048];
 862
 863         if (check_config) return 0;
 864
 865         if (!this->data) {
 866                 this->data = rad_malloc(sizeof(*data));
 867                 memset(this->data, 0, sizeof(*data));
 868         }
 869
 870         data = this->data;
 871
 872         rcode = cf_section_parse(cs, data, detail_config);
 873         if (rcode < 0) {
 874                 cf_log_err_cs(cs, "Failed parsing listen section");
 875                 return -1;
 876         }
 877
 878         if (!data->filename) {
 879                 cf_log_err_cs(cs, "No detail file specified in listen section");
 880                 return -1;
 881         }
 882
 883         if ((data->load_factor < 1) || (data->load_factor > 100)) {
 884                 cf_log_err_cs(cs, "Load factor must be between 1 and 100");
 885                 return -1;
 886         }
 887
 888         if ((data->poll_interval < 1) || (data->poll_interval > 20)) {
 889                 cf_log_err_cs(cs, "poll_interval must be between 1 and 20");
 890                 return -1;
 891         }
 892
 893         if (data->max_outstanding == 0) data->max_outstanding = 1;
 894
 895         /*
 896          *      If the filename is a glob, use "detail.work" as the
 897          *      work file name.
 898          */
 899         if ((strchr(data->filename, '*') != NULL) ||
 900             (strchr(data->filename, '[') != NULL)) {
 901                 char *p;
 902
 903 #ifndef HAVE_GLOB_H
 904                 radlog(L_INFO, "WARNING: Detail file \"%s\" appears to use file globbing, but it is not supported on this system.", data->filename);
 905 #endif
 906                 strlcpy(buffer, data->filename, sizeof(buffer));
 907                 p = strrchr(buffer, FR_DIR_SEP);
 908                 if (p) {
 909                         p[1] = '\0';
 910                 } else {
 911                         buffer[0] = '\0';
 912                 }
 913                 strlcat(buffer, "detail.work",
 914                         sizeof(buffer) - strlen(buffer));
 915
 916         } else {
 917                 snprintf(buffer, sizeof(buffer), "%s.work", data->filename);
 918         }
 919
 920         free(data->filename_work);
 921         data->filename_work = strdup(buffer); /* FIXME: leaked */
 922
 923         data->vps = NULL;
 924         data->fp = NULL;
 925         data->state = STATE_UNOPENED;
 926         data->delay_time = data->poll_interval * USEC;
 927         data->signal = 1;
 928
 929         /*
 930          *      Initialize the fake client.
 931          */
 932         client = &data->detail_client;
 933         memset(client, 0, sizeof(*client));
 934         client->ipaddr.af = AF_INET;
 935         client->ipaddr.ipaddr.ip4addr.s_addr = INADDR_NONE;
 936         client->prefix = 0;
 937         client->longname = client->shortname = data->filename;
 938         client->secret = client->shortname;
 939         client->nastype = strdup("none");
 940
 941         return 0;
 942 }
 943 #endif