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 #include <freeradius-devel/ident.h>
  25 RCSID("$Id$")
  26
  27 #include <freeradius-devel/radiusd.h>
  28 #include <freeradius-devel/modules.h>
  29 #include <freeradius-devel/detail.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 typedef struct listen_detail_t {
  47         int             delay_time; /* should be first entry */
  48         char            *filename;
  49         char            *filename_work;
  50         VALUE_PAIR      *vps;
  51         FILE            *fp;
  52         int             state;
  53         time_t          timestamp;
  54         fr_ipaddr_t     client_ip;
  55         int             load_factor; /* 1..100 */
  56         int             signal;
  57         int             poll_interval;
  58
  59         int             has_rtt;
  60         int             srtt;
  61         int             rttvar;
  62         struct timeval  last_packet;
  63         RADCLIENT       detail_client;
  64 } listen_detail_t;
  65
  66
  67 #define STATE_UNOPENED  (0)
  68 #define STATE_UNLOCKED  (1)
  69 #define STATE_HEADER    (2)
  70 #define STATE_READING   (3)
  71 #define STATE_QUEUED    (4)
  72 #define STATE_RUNNING   (5)
  73 #define STATE_NO_REPLY  (6)
  74 #define STATE_REPLIED   (7)
  75
  76 /*
  77  *      If we're limiting outstanding packets, then mark the response
  78  *      as being sent.
  79  */
  80 int detail_send(rad_listen_t *listener, REQUEST *request)
  81 {
  82         int rtt;
  83         struct timeval now;
  84         listen_detail_t *data = listener->data;
  85
  86         rad_assert(request->listener == listener);
  87         rad_assert(listener->send == detail_send);
  88
  89         /*
  90          *      This request timed out.  Remember that, and tell the
  91          *      caller it's OK to read more "detail" file stuff.
  92          */
  93         if (request->reply->code == 0) {
  94                 data->delay_time = USEC;
  95                 data->signal = 1;
  96                 data->state = STATE_NO_REPLY;
  97                 radius_signal_self(RADIUS_SIGNAL_SELF_DETAIL);
  98                 return 0;
  99         }
 100
 101         /*
 102          *      We call gettimeofday a lot.  But here it should be OK,
 103          *      because there's nothing else to do.
 104          */
 105         gettimeofday(&now, NULL);
 106
 107         /*
 108          *      If we haven't sent a packet in the last second, reset
 109          *      the RTT.
 110          */
 111         now.tv_sec -= 1;
 112         if (timercmp(&data->last_packet, &now, <)) {
 113                 data->has_rtt = FALSE;
 114         }
 115         now.tv_sec += 1;
 116
 117         /*
 118          *      Only one detail packet may be outstanding at a time,
 119          *      so it's safe to update some entries in the detail
 120          *      structure.
 121          *
 122          *      We keep smoothed round trip time (SRTT), but not round
 123          *      trip timeout (RTO).  We use SRTT to calculate a rough
 124          *      load factor.
 125          */
 126         rtt = now.tv_sec - request->received.tv_sec;
 127         rtt *= USEC;
 128         rtt += now.tv_usec;
 129         rtt -= request->received.tv_usec;
 130
 131         /*
 132          *      If we're proxying, the RTT is our processing time,
 133          *      plus the network delay there and back, plus the time
 134          *      on the other end to process the packet.  Ideally, we
 135          *      should remove the network delays from the RTT, but we
 136          *      don't know what they are.
 137          *
 138          *      So, to be safe, we over-estimate the total cost of
 139          *      processing the packet.
 140          */
 141         if (!data->has_rtt) {
 142                 data->has_rtt = TRUE;
 143                 data->srtt = rtt;
 144                 data->rttvar = rtt / 2;
 145
 146         } else {
 147                 data->rttvar -= data->rttvar >> 2;
 148                 data->rttvar += (data->srtt - rtt);
 149                 data->srtt -= data->srtt >> 3;
 150                 data->srtt += rtt >> 3;
 151         }
 152
 153         /*
 154          *      Calculate the time we wait before sending the next
 155          *      packet.
 156          *
 157          *      rtt / (rtt + delay) = load_factor / 100
 158          */
 159         data->delay_time = (data->srtt * (100 - data->load_factor)) / (data->load_factor);
 160         if (data->delay_time == 0) data->delay_time = USEC / 10;
 161
 162         /*
 163          *      Cap delay at 4 packets/s.  If the end system can't
 164          *      handle this, then it's very broken.
 165          */
 166         if (data->delay_time > (USEC / 4)) data->delay_time= USEC / 4;
 167
 168 #if 0
 169         DEBUG2("RTT %d\tdelay %d", data->srtt, data->delay_time);
 170 #endif
 171
 172         data->last_packet = now;
 173         data->signal = 1;
 174         data->state = STATE_REPLIED;
 175         radius_signal_self(RADIUS_SIGNAL_SELF_DETAIL);
 176
 177         return 0;
 178 }
 179
 180 int detail_delay(rad_listen_t *listener)
 181 {
 182         listen_detail_t *data = listener->data;
 183
 184         if (!data->signal) return 0;
 185
 186         data->signal = 0;
 187
 188         return data->delay_time;
 189 }
 190
 191
 192 /*
 193  *      Open the detail file, if we can.
 194  *
 195  *      FIXME: create it, if it's not already there, so that the main
 196  *      server select() will wake us up if there's anything to read.
 197  */
 198 static int detail_open(rad_listen_t *this)
 199 {
 200         struct stat st;
 201         listen_detail_t *data = this->data;
 202         char *filename = data->filename;
 203
 204         rad_assert(data->state == STATE_UNOPENED);
 205         data->delay_time = USEC;
 206
 207         /*
 208          *      Open detail.work first, so we don't lose
 209          *      accounting packets.  It's probably better to
 210          *      duplicate them than to lose them.
 211          *
 212          *      Note that we're not writing to the file, but
 213          *      we've got to open it for writing in order to
 214          *      establish the lock, to prevent rlm_detail from
 215          *      writing to it.
 216          *
 217          *      This also means that if we're doing globbing,
 218          *      this file will be read && processed before the
 219          *      file globbing is done.
 220          */
 221         this->fd = open(data->filename_work, O_RDWR);
 222         if (this->fd < 0) {
 223                 DEBUG2("Polling for detail file %s", filename);
 224
 225                 /*
 226                  *      Try reading the detail file.  If it
 227                  *      doesn't exist, we can't do anything.
 228                  *
 229                  *      Doing the stat will tell us if the file
 230                  *      exists, even if we don't have permissions
 231                  *      to read it.
 232                  */
 233                 if (stat(filename, &st) < 0) {
 234 #ifdef HAVE_GLOB_H
 235                         int i, found;
 236                         time_t chtime;
 237                         glob_t files;
 238
 239                         memset(&files, 0, sizeof(files));
 240                         if (glob(filename, 0, NULL, &files) != 0) {
 241                                 return 0;
 242                         }
 243
 244                         chtime = 0;
 245                         found = -1;
 246                         for (i = 0; i < files.gl_pathc; i++) {
 247                                 if (stat(files.gl_pathv[i], &st) < 0) continue;
 248
 249                                 if ((i == 0) ||
 250                                     (st.st_ctime < chtime)) {
 251                                         chtime = st.st_ctime;
 252                                         found = i;
 253                                 }
 254                         }
 255
 256                         if (found < 0) {
 257                                 globfree(&files);
 258                                 return 0;
 259                         }
 260
 261                         filename = strdup(files.gl_pathv[found]);
 262                         globfree(&files);
 263 #else
 264                         return 0;
 265 #endif
 266                 }
 267
 268                 /*
 269                  *      Open it BEFORE we rename it, just to
 270                  *      be safe...
 271                  */
 272                 this->fd = open(filename, O_RDWR);
 273                 if (this->fd < 0) {
 274                         radlog(L_ERR, "Failed to open %s: %s",
 275                                filename, strerror(errno));
 276                         if (filename != data->filename) free(filename);
 277                         return 0;
 278                 }
 279
 280                 /*
 281                  *      Rename detail to detail.work
 282                  */
 283                 DEBUG("detail_recv: Renaming %s -> %s", filename, data->filename_work);
 284                 if (rename(filename, data->filename_work) < 0) {
 285                         if (filename != data->filename) free(filename);
 286                         close(this->fd);
 287                         this->fd = -1;
 288                         return 0;
 289                 }
 290                 if (filename != data->filename) free(filename);
 291         } /* else detail.work existed, and we opened it */
 292
 293         rad_assert(data->vps == NULL);
 294         rad_assert(data->fp == NULL);
 295
 296         data->state = STATE_UNLOCKED;
 297
 298         data->client_ip.af = AF_UNSPEC;
 299         data->timestamp = 0;
 300
 301         return 1;
 302 }
 303
 304
 305 /*
 306  *      FIXME: add a configuration "exit when done" so that the detail
 307  *      file reader can be used as a one-off tool to update stuff.
 308  *
 309  *      The time sequence for reading from the detail file is:
 310  *
 311  *      t_0             signalled that the server is idle, and we
 312  *                      can read from the detail file.
 313  *
 314  *      t_rtt           the packet has been processed successfully,
 315  *                      wait for t_delay to enforce load factor.
 316  *
 317  *      t_rtt + t_delay wait for signal that the server is idle.
 318  *
 319  */
 320 int detail_recv(rad_listen_t *listener,
 321                 RAD_REQUEST_FUNP *pfun, REQUEST **prequest)
 322 {
 323         char            key[256], value[1024];
 324         VALUE_PAIR      *vp, **tail;
 325         RADIUS_PACKET   *packet;
 326         char            buffer[2048];
 327         listen_detail_t *data = listener->data;
 328
 329         switch (data->state) {
 330                 case STATE_UNOPENED:
 331         open_file:
 332                         rad_assert(listener->fd < 0);
 333
 334                         if (!detail_open(listener)) return 0;
 335
 336                         rad_assert(data->state == STATE_UNLOCKED);
 337                         rad_assert(listener->fd >= 0);
 338
 339                         /* FALL-THROUGH */
 340
 341                         /*
 342                          *      Try to lock fd.  If we can't, return.
 343                          *      If we can, continue.  This means that
 344                          *      the server doesn't block while waiting
 345                          *      for the lock to open...
 346                          */
 347                 case STATE_UNLOCKED:
 348                         /*
 349                          *      Note that we do NOT block waiting for
 350                          *      the lock.  We've re-named the file
 351                          *      above, so we've already guaranteed
 352                          *      that any *new* detail writer will not
 353                          *      be opening this file.  The only
 354                          *      purpose of the lock is to catch a race
 355                          *      condition where the execution
 356                          *      "ping-pongs" between radiusd &
 357                          *      radrelay.
 358                          */
 359                         if (rad_lockfd_nonblock(listener->fd, 0) < 0) {
 360                                 /*
 361                                  *      Close the FD.  The main loop
 362                                  *      will wake up in a second and
 363                                  *      try again.
 364                                  */
 365                                 close(listener->fd);
 366                                 listener->fd = -1;
 367                                 data->state = STATE_UNOPENED;
 368                                 return 0;
 369                         }
 370
 371                         data->fp = fdopen(listener->fd, "r");
 372                         if (!data->fp) {
 373                                 radlog(L_ERR, "FATAL: Failed to re-open detail file %s: %s",
 374                                        data->filename, strerror(errno));
 375                                 exit(1);
 376                         }
 377
 378                         /*
 379                          *      Look for the header
 380                          */
 381                         data->state = STATE_HEADER;
 382                         data->vps = NULL;
 383
 384                         /* FALL-THROUGH */
 385
 386                 case STATE_HEADER:
 387                 do_header:
 388                         if (!data->fp) {
 389                                 data->state = STATE_UNOPENED;
 390                                 goto open_file;
 391                         }
 392
 393                         {
 394                                 struct stat buf;
 395
 396                                 fstat(listener->fd, &buf);
 397                                 if (((off_t) ftell(data->fp)) == buf.st_size) {
 398                                         goto cleanup;
 399                                 }
 400                         }
 401
 402                         /*
 403                          *      End of file.  Delete it, and re-set
 404                          *      everything.
 405                          */
 406                         if (feof(data->fp)) {
 407                         cleanup:
 408                                 unlink(data->filename_work);
 409                                 if (data->fp) fclose(data->fp);
 410                                 data->fp = NULL;
 411                                 listener->fd = -1;
 412                                 data->state = STATE_UNOPENED;
 413                                 rad_assert(data->vps == NULL);
 414                                 return 0;
 415                         }
 416
 417                         /*
 418                          *      Else go read something.
 419                          */
 420                         break;
 421
 422                         /*
 423                          *      Read more value-pair's, unless we're
 424                          *      at EOF.  In that case, queue whatever
 425                          *      we have.
 426                          */
 427                 case STATE_READING:
 428                         if (data->fp && !feof(data->fp)) break;
 429                         data->state = STATE_QUEUED;
 430
 431                         /* FALL-THROUGH */
 432
 433                 case STATE_QUEUED:
 434                         goto alloc_packet;
 435
 436                         /*
 437                          *      We still have an outstanding packet.
 438                          *      Don't read any more.
 439                          */
 440                 case STATE_RUNNING:
 441                         return 0;
 442
 443                         /*
 444                          *      If there's no reply, keep
 445                          *      retransmitting the current packet
 446                          *      forever.
 447                          */
 448                 case STATE_NO_REPLY:
 449                         data->state = STATE_QUEUED;
 450                         goto alloc_packet;
 451
 452                         /*
 453                          *      We have a reply.  Clean up the old
 454                          *      request, and go read another one.
 455                          */
 456                 case STATE_REPLIED:
 457                         pairfree(&data->vps);
 458                         data->state = STATE_HEADER;
 459                         goto do_header;
 460         }
 461
 462         tail = &data->vps;
 463         while (*tail) tail = &(*tail)->next;
 464
 465         /*
 466          *      Read a header, OR a value-pair.
 467          */
 468         while (fgets(buffer, sizeof(buffer), data->fp)) {
 469                 /*
 470                  *      Badly formatted file: delete it.
 471                  *
 472                  *      FIXME: Maybe flag an error?
 473                  */
 474                 if (!strchr(buffer, '\n')) {
 475                         pairfree(&data->vps);
 476                         goto cleanup;
 477                 }
 478
 479                 /*
 480                  *      We're reading VP's, and got a blank line.
 481                  *      Queue the packet.
 482                  */
 483                 if ((data->state == STATE_READING) &&
 484                     (buffer[0] == '\n')) {
 485                         data->state = STATE_QUEUED;
 486                         break;
 487                 }
 488
 489                 /*
 490                  *      Look for date/time header, and read VP's if
 491                  *      found.  If not, keep reading lines until we
 492                  *      find one.
 493                  */
 494                 if (data->state == STATE_HEADER) {
 495                         int y;
 496
 497                         if (sscanf(buffer, "%*s %*s %*d %*d:%*d:%*d %d", &y)) {
 498                                 data->state = STATE_READING;
 499                         }
 500                         continue;
 501                 }
 502
 503                 /*
 504                  *      We have a full "attribute = value" line.
 505                  *      If it doesn't look reasonable, skip it.
 506                  *
 507                  *      FIXME: print an error for badly formatted attributes?
 508                  */
 509                 if (sscanf(buffer, "%255s = %1023s", key, value) != 2) {
 510                         continue;
 511                 }
 512
 513                 /*
 514                  *      Skip non-protocol attributes.
 515                  */
 516                 if (!strcasecmp(key, "Request-Authenticator")) continue;
 517
 518                 /*
 519                  *      Set the original client IP address, based on
 520                  *      what's in the detail file.
 521                  *
 522                  *      Hmm... we don't set the server IP address.
 523                  *      or port.  Oh well.
 524                  */
 525                 if (!strcasecmp(key, "Client-IP-Address")) {
 526                         data->client_ip.af = AF_INET;
 527                         ip_hton(value, AF_INET, &data->client_ip);
 528                         continue;
 529                 }
 530
 531                 /*
 532                  *      The original time at which we received the
 533                  *      packet.  We need this to properly calculate
 534                  *      Acct-Delay-Time.
 535                  */
 536                 if (!strcasecmp(key, "Timestamp")) {
 537                         data->timestamp = atoi(value);
 538
 539                         vp = paircreate(PW_PACKET_ORIGINAL_TIMESTAMP,
 540                                         PW_TYPE_DATE);
 541                         if (vp) {
 542                                 vp->vp_date = (uint32_t) data->timestamp;
 543                                 *tail = vp;
 544                                 tail = &(vp->next);
 545                         }
 546                         continue;
 547                 }
 548
 549                 /*
 550                  *      Read one VP.
 551                  *
 552                  *      FIXME: do we want to check for non-protocol
 553                  *      attributes like radsqlrelay does?
 554                  */
 555                 vp = NULL;
 556                 if ((userparse(buffer, &vp) > 0) &&
 557                     (vp != NULL)) {
 558                         *tail = vp;
 559                         tail = &(vp->next);
 560                 }
 561         }
 562
 563         /*
 564          *      Some kind of error.
 565          *
 566          *      FIXME: Leave the file in-place, and warn the
 567          *      administrator?
 568          */
 569         if (ferror(data->fp)) goto cleanup;
 570
 571         /*
 572          *      Process the packet.
 573          */
 574  alloc_packet:
 575         rad_assert(data->state == STATE_QUEUED);
 576
 577         /*
 578          *      We're done reading the file, but we didn't read
 579          *      anything.  Clean up, and don't return anything.
 580          */
 581         if (!data->vps) {
 582                 data->state = STATE_HEADER;
 583                 if (feof(data->fp)) goto cleanup;
 584                 return 0;
 585         }
 586
 587         /*
 588          *      Allocate the packet.  If we fail, it's a serious
 589          *      problem.
 590          */
 591         packet = rad_alloc(1);
 592         if (!packet) {
 593                 radlog(L_ERR, "FATAL: Failed allocating memory for detail");
 594                 exit(1);
 595         }
 596
 597         memset(packet, 0, sizeof(*packet));
 598         packet->sockfd = -1;
 599         packet->src_ipaddr.af = AF_INET;
 600         packet->src_ipaddr.ipaddr.ip4addr.s_addr = htonl(INADDR_NONE);
 601         packet->code = PW_ACCOUNTING_REQUEST;
 602         packet->timestamp = time(NULL);
 603
 604         /*
 605          *      Remember where it came from, so that we don't
 606          *      proxy it to the place it came from...
 607          */
 608         if (data->client_ip.af != AF_UNSPEC) {
 609                 packet->src_ipaddr = data->client_ip;
 610         }
 611
 612         vp = pairfind(packet->vps, PW_PACKET_SRC_IP_ADDRESS);
 613         if (vp) {
 614                 packet->src_ipaddr.af = AF_INET;
 615                 packet->src_ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
 616         } else {
 617                 vp = pairfind(packet->vps, PW_PACKET_SRC_IPV6_ADDRESS);
 618                 if (vp) {
 619                         packet->src_ipaddr.af = AF_INET6;
 620                         memcpy(&packet->src_ipaddr.ipaddr.ip6addr,
 621                                &vp->vp_ipv6addr, sizeof(vp->vp_ipv6addr));
 622                 }
 623         }
 624
 625         vp = pairfind(packet->vps, PW_PACKET_DST_IP_ADDRESS);
 626         if (vp) {
 627                 packet->dst_ipaddr.af = AF_INET;
 628                 packet->dst_ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
 629         } else {
 630                 vp = pairfind(packet->vps, PW_PACKET_DST_IPV6_ADDRESS);
 631                 if (vp) {
 632                         packet->dst_ipaddr.af = AF_INET6;
 633                         memcpy(&packet->dst_ipaddr.ipaddr.ip6addr,
 634                                &vp->vp_ipv6addr, sizeof(vp->vp_ipv6addr));
 635                 }
 636         }
 637
 638         /*
 639          *      We've got to give SOME value for Id & ports, so that
 640          *      the packets can be added to the request queue.
 641          *      However, we don't want to keep track of used/unused
 642          *      id's and ports, as that's a lot of work.  This hack
 643          *      ensures that (if we have real random numbers), that
 644          *      there will be a collision on every 2^(16+15+15+24 - 1)
 645          *      packets, on average.  That means we can read 2^37
 646          *      packets before having a collision, which means it's
 647          *      effectively impossible.
 648          */
 649         packet->id = fr_rand() & 0xffff;
 650         packet->src_port = 1024 + (fr_rand() & 0x7fff);
 651         packet->dst_port = 1024 + (fr_rand() & 0x7fff);
 652
 653         packet->dst_ipaddr.af = AF_INET;
 654         packet->dst_ipaddr.ipaddr.ip4addr.s_addr = htonl((INADDR_LOOPBACK & ~0xffffff) | (fr_rand() & 0xffffff));
 655
 656         /*
 657          *      If everything's OK, this is a waste of memory.
 658          *      Otherwise, it lets us re-send the original packet
 659          *      contents, unmolested.
 660          */
 661         packet->vps = paircopy(data->vps);
 662
 663         /*
 664          *      Look for Acct-Delay-Time, and update
 665          *      based on Acct-Delay-Time += (time(NULL) - timestamp)
 666          */
 667         vp = pairfind(packet->vps, PW_ACCT_DELAY_TIME);
 668         if (!vp) {
 669                 vp = paircreate(PW_ACCT_DELAY_TIME, PW_TYPE_INTEGER);
 670                 rad_assert(vp != NULL);
 671                 pairadd(&packet->vps, vp);
 672         }
 673         if (data->timestamp != 0) {
 674                 vp->vp_integer += time(NULL) - data->timestamp;
 675         }
 676
 677         *pfun = rad_accounting;
 678
 679         if (debug_flag) {
 680                 fr_printf_log("detail_recv: Read packet from %s\n", data->filename_work);
 681                 for (vp = packet->vps; vp; vp = vp->next) {
 682                         debug_pair(vp);
 683                 }
 684         }
 685
 686         /*
 687          *      FIXME: many of these checks may not be necessary when
 688          *      reading from the detail file.
 689          *
 690          *      Try again later...
 691          */
 692         if (!received_request(listener, packet, prequest,
 693                               &data->detail_client)) {
 694                 rad_free(&packet);
 695                 data->state = STATE_NO_REPLY;   /* try again later */
 696                 return 0;
 697         }
 698
 699         data->state = STATE_RUNNING;
 700
 701         return 1;
 702 }
 703
 704
 705 /*
 706  *      Free detail-specific stuff.
 707  */
 708 void detail_free(rad_listen_t *this)
 709 {
 710         listen_detail_t *data = this->data;
 711
 712         free(data->filename);
 713         pairfree(&data->vps);
 714
 715         if (data->fp != NULL) fclose(data->fp);
 716 }
 717
 718
 719 int detail_print(rad_listen_t *this, char *buffer, size_t bufsize)
 720 {
 721         if (!this->server) {
 722                 return snprintf(buffer, bufsize, "%s",
 723                                 ((listen_detail_t *)(this->data))->filename);
 724         }
 725
 726         return snprintf(buffer, bufsize, "detail file %s as server %s",
 727                         ((listen_detail_t *)(this->data))->filename,
 728                         this->server);
 729 }
 730
 731 int detail_encode(UNUSED rad_listen_t *this, UNUSED REQUEST *request)
 732 {
 733         /*
 734          *      We never encode responses "sent to" the detail file.
 735          */
 736         return 0;
 737 }
 738
 739 int detail_decode(UNUSED rad_listen_t *this, UNUSED REQUEST *request)
 740 {
 741         /*
 742          *      We never decode responses read from the detail file.
 743          */
 744         return 0;
 745 }
 746
 747
 748 static const CONF_PARSER detail_config[] = {
 749         { "filename",   PW_TYPE_STRING_PTR,
 750           offsetof(listen_detail_t, filename), NULL,  NULL },
 751         { "load_factor",   PW_TYPE_INTEGER,
 752           offsetof(listen_detail_t, load_factor), NULL, Stringify(10)},
 753         { "poll_interval",   PW_TYPE_INTEGER,
 754           offsetof(listen_detail_t, poll_interval), NULL, Stringify(1)},
 755
 756         { NULL, -1, 0, NULL, NULL }             /* end the list */
 757 };
 758
 759
 760 /*
 761  *      Parse a detail section.
 762  */
 763 int detail_parse(CONF_SECTION *cs, rad_listen_t *this)
 764 {
 765         int             rcode;
 766         listen_detail_t *data;
 767         RADCLIENT       *client;
 768         char buffer[2048];
 769
 770         if (!this->data) {
 771                 this->data = rad_malloc(sizeof(*data));
 772                 memset(this->data, 0, sizeof(*data));
 773         }
 774
 775         data = this->data;
 776         data->delay_time = USEC;
 777
 778         rcode = cf_section_parse(cs, data, detail_config);
 779         if (rcode < 0) {
 780                 cf_log_err(cf_sectiontoitem(cs), "Failed parsing listen section");
 781                 return -1;
 782         }
 783
 784         if (!data->filename) {
 785                 cf_log_err(cf_sectiontoitem(cs), "No detail file specified in listen section");
 786                 return -1;
 787         }
 788
 789         if ((data->load_factor < 1) || (data->load_factor > 100)) {
 790                 cf_log_err(cf_sectiontoitem(cs), "Load factor must be between 1 and 100");
 791                 return -1;
 792         }
 793
 794         if ((data->poll_interval < 1) || (data->poll_interval > 3600)) {
 795                 cf_log_err(cf_sectiontoitem(cs), "poll_interval must be between 1 and 3600");
 796                 return -1;
 797         }
 798
 799         /*
 800          *      If the filename is a glob, use "detail.work" as the
 801          *      work file name.
 802          */
 803         if ((strchr(data->filename, '*') != NULL) ||
 804             (strchr(data->filename, '[') != NULL)) {
 805                 char *p;
 806
 807 #ifndef HAVE_GLOB_H
 808                 radlog(L_INFO, "WARNING: Detail file \"%s\" appears to use file globbing, but it is not supported on this system.", data->filename);
 809 #endif
 810                 strlcpy(buffer, data->filename, sizeof(buffer));
 811                 p = strrchr(buffer, FR_DIR_SEP);
 812                 if (p) {
 813                         p[1] = '\0';
 814                 } else {
 815                         buffer[0] = '\0';
 816                 }
 817                 strlcat(buffer, "detail.work",
 818                         sizeof(buffer) - strlen(buffer));
 819
 820         } else {
 821                 snprintf(buffer, sizeof(buffer), "%s.work", data->filename);
 822         }
 823
 824         free(data->filename_work);
 825         data->filename_work = strdup(buffer); /* FIXME: leaked */
 826
 827         data->vps = NULL;
 828         data->fp = NULL;
 829         data->state = STATE_UNOPENED;
 830
 831         /*
 832          *      Initialize the fake client.
 833          */
 834         client = &data->detail_client;
 835         memset(client, 0, sizeof(*client));
 836         client->ipaddr.af = AF_INET;
 837         client->ipaddr.ipaddr.ip4addr.s_addr = INADDR_NONE;
 838         client->prefix = 0;
 839         client->longname = client->shortname = data->filename;
 840         client->secret = client->shortname;
 841         client->nastype = strdup("none");
 842
 843         return 0;
 844 }
 845
 846 int detail_poll_interval(rad_listen_t *listener)
 847 {
 848         listen_detail_t *data = listener->data;
 849
 850         return data->poll_interval;
 851 }
 852
 853 #endif