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