src/main/event.c

   1 /*
   2  * event.c      Server event handling
   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/event.h>
  30 #include <freeradius-devel/detail.h>
  31
  32 #include <freeradius-devel/rad_assert.h>
  33
  34 #include <signal.h>
  35 #include <fcntl.h>
  36
  37 #ifdef HAVE_SYS_WAIT_H
  38 #       include <sys/wait.h>
  39 #endif
  40
  41 #define USEC (1000000)
  42
  43 extern pid_t radius_pid;
  44 extern int dont_fork;
  45 extern int check_config;
  46 extern void force_log_reopen(void);
  47 extern char *debug_condition;
  48
  49 /*
  50  *      Ridiculous amounts of local state.
  51  */
  52 static fr_event_list_t  *el = NULL;
  53 static fr_packet_list_t *pl = NULL;
  54 static int                      request_num_counter = 0;
  55 static struct timeval           now;
  56 time_t                          fr_start_time;
  57 static int                      have_children;
  58 static int                      just_started = TRUE;
  59
  60 #ifndef __MINGW32__
  61 #ifdef HAVE_PTHREAD_H
  62 #define WITH_SELF_PIPE (1)
  63 #endif
  64 #endif
  65
  66 #ifdef WITH_SELF_PIPE
  67 static int self_pipe[2];
  68 #endif
  69
  70 #ifdef HAVE_PTHREAD_H
  71 #ifdef WITH_PROXY
  72 static pthread_mutex_t  proxy_mutex;
  73 #endif
  74
  75 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
  76 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
  77
  78 static pthread_t NO_SUCH_CHILD_PID;
  79 #else
  80 /*
  81  *      This is easier than ifdef's throughout the code.
  82  */
  83 #define PTHREAD_MUTEX_LOCK(_x)
  84 #define PTHREAD_MUTEX_UNLOCK(_x)
  85 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
  86 {
  87         radius_handle_request(request, fun);
  88         return 1;
  89 }
  90 #endif
  91
  92 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
  93
  94 #ifdef WITH_PROXY
  95 static fr_packet_list_t *proxy_list = NULL;
  96
  97 /*
  98  *      We keep the proxy FD's here.  The RADIUS Id's are marked
  99  *      "allocated" per Id, via a bit per proxy FD.
 100  */
 101 static int              proxy_fds[32];
 102 static rad_listen_t     *proxy_listeners[32];
 103 #else
 104 #define remove_from_proxy_hash(foo)
 105 #endif
 106
 107 static void request_post_handler(REQUEST *request);
 108 static void wait_a_bit(void *ctx);
 109 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
 110 #ifdef WITH_DETAIL
 111 static void event_poll_detail(void *ctx);
 112 #endif
 113
 114 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
 115                                     const char *msg)
 116 {
 117         radlog(L_ERR, "[%s:%d] %s", file, line, msg);
 118         _exit(1);
 119 }
 120
 121 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
 122
 123
 124 static void tv_add(struct timeval *tv, int usec_delay)
 125 {
 126         if (usec_delay > USEC) {
 127                 tv->tv_sec += usec_delay / USEC;
 128                 usec_delay %= USEC;
 129         }
 130         tv->tv_usec += usec_delay;
 131
 132         if (tv->tv_usec > USEC) {
 133                 tv->tv_usec -= USEC;
 134                 tv->tv_sec++;
 135         }
 136 }
 137
 138 static void remove_from_request_hash(REQUEST *request)
 139 {
 140         if (!request->in_request_hash) return;
 141
 142         fr_packet_list_yank(pl, request->packet);
 143         request->in_request_hash = FALSE;
 144
 145         request_stats_final(request);
 146 }
 147
 148
 149 #ifdef WITH_PROXY
 150 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
 151 {
 152         RADIUS_PACKET **proxy_p;
 153         REQUEST *request;
 154
 155         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 156         proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
 157
 158         if (!proxy_p) {
 159                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 160                 return NULL;
 161         }
 162
 163         request = fr_packet2myptr(REQUEST, proxy, proxy_p);
 164
 165         if (!request) {
 166                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 167                 return NULL;
 168         }
 169
 170         request->num_proxied_responses++;
 171
 172         /*
 173          *      Catch the most common case of everything working
 174          *      correctly.
 175          */
 176         if (request->num_proxied_requests == request->num_proxied_responses) {
 177                 fr_packet_list_yank(proxy_list, request->proxy);
 178                 fr_packet_list_id_free(proxy_list, request->proxy);
 179                 request->in_proxy_hash = FALSE;
 180         }
 181
 182         /*
 183          *      On the FIRST reply, decrement the count of outstanding
 184          *      requests.  Note that this is NOT the count of sent
 185          *      packets, but whether or not the home server has
 186          *      responded at all.
 187          */
 188         if (!request->proxy_reply &&
 189             request->home_server &&
 190             request->home_server->currently_outstanding) {
 191                 request->home_server->currently_outstanding--;
 192         }
 193
 194         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 195
 196         return request;
 197 }
 198
 199
 200 static void remove_from_proxy_hash(REQUEST *request)
 201 {
 202         /*
 203          *      Check this without grabbing the mutex because it's a
 204          *      lot faster that way.
 205          */
 206         if (!request->in_proxy_hash) return;
 207
 208         /*
 209          *      The "not in hash" flag is definitive.  However, if the
 210          *      flag says that it IS in the hash, there might still be
 211          *      a race condition where it isn't.
 212          */
 213         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 214
 215         if (!request->in_proxy_hash) {
 216                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 217                 return;
 218         }
 219
 220         fr_packet_list_yank(proxy_list, request->proxy);
 221         fr_packet_list_id_free(proxy_list, request->proxy);
 222
 223         /*
 224          *      The home server hasn't replied, but we've given up on
 225          *      this request.  Don't count this request against the
 226          *      home server.
 227          */
 228         if (!request->proxy_reply &&
 229             request->home_server &&
 230             request->home_server->currently_outstanding) {
 231                 request->home_server->currently_outstanding--;
 232         }
 233
 234         /*
 235          *      Got from YES in hash, to NO, not in hash while we hold
 236          *      the mutex.  This guarantees that when another thread
 237          *      grans the mutex, the "not in hash" flag is correct.
 238          */
 239         request->in_proxy_hash = FALSE;
 240
 241         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 242 }
 243
 244 static void ev_request_free(REQUEST **prequest)
 245 {
 246         REQUEST *request;
 247
 248         if (!prequest || !*prequest) return;
 249
 250         request = *prequest;
 251
 252 #ifdef WITH_COA
 253         if (request->coa) {
 254                 /*
 255                  *      Divorce the child from the parent first,
 256                  *      then clean up the child.
 257                  */
 258                 request->coa->parent = NULL;
 259                 ev_request_free(&request->coa);
 260         }
 261
 262         /*
 263          *      Divorce the parent from the child, and leave the
 264          *      parent still alive.
 265          */
 266         if (request->parent && (request->parent->coa == request)) {
 267                 request->parent->coa = NULL;
 268         }
 269 #endif
 270
 271         if (request->ev) fr_event_delete(el, &request->ev);
 272         if (request->in_proxy_hash) remove_from_proxy_hash(request);
 273         if (request->in_request_hash) remove_from_request_hash(request);
 274
 275         request_free(prequest);
 276 }
 277
 278 static int proxy_id_alloc(REQUEST *request, RADIUS_PACKET *packet)
 279 {
 280         int i, proxy, found;
 281         rad_listen_t *proxy_listener;
 282
 283         if (fr_packet_list_id_alloc(proxy_list, packet)) return 1;
 284
 285         /*
 286          *      Allocate a new proxy fd.  This function adds
 287          *      it to the tail of the list of listeners.  With
 288          *      some care, this can be thread-safe.
 289          */
 290         proxy_listener = proxy_new_listener(&packet->src_ipaddr, FALSE);
 291         if (!proxy_listener) {
 292                 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 293                 return 0;
 294         }
 295
 296         /*
 297          *      Cache it locally.
 298          */
 299         found = -1;
 300         proxy = proxy_listener->fd;
 301         for (i = 0; i < 32; i++) {
 302                 /*
 303                  *      Found a free entry.  Save the socket,
 304                  *      and remember where we saved it.
 305                  */
 306                 if (proxy_fds[(proxy + i) & 0x1f] == -1) {
 307                         found = (proxy + i) & 0x1f;
 308                         proxy_fds[found] = proxy;
 309                         proxy_listeners[found] = proxy_listener;
 310                         break;
 311                 }
 312         }
 313         rad_assert(found >= 0);
 314
 315         if (!fr_packet_list_socket_add(proxy_list, proxy_listener->fd)) {
 316                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 317                 return 0;
 318
 319         }
 320
 321         if (!fr_packet_list_id_alloc(proxy_list, packet)) {
 322                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 323                 return 0;
 324         }
 325
 326         /*
 327          *      Signal the main thread to add the new FD to the list
 328          *      of listening FD's.
 329          */
 330         radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
 331         return 1;
 332 }
 333
 334
 335 static int insert_into_proxy_hash(REQUEST *request, int retransmit)
 336 {
 337         int i, proxy;
 338         char buf[128];
 339
 340         rad_assert(request->proxy != NULL);
 341         rad_assert(proxy_list != NULL);
 342
 343         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 344
 345         /*
 346          *      Keep track of maximum outstanding requests to a
 347          *      particular home server.  'max_outstanding' is
 348          *      enforced in home_server_ldb(), in realms.c.
 349          */
 350         if (request->home_server) {
 351                 request->home_server->currently_outstanding++;
 352                 request->home_server->stats.total_requests++;
 353         }
 354
 355         if (retransmit) {
 356                 RADIUS_PACKET packet;
 357
 358                 packet = *request->proxy;
 359
 360                 if (!proxy_id_alloc(request, &packet)) {
 361                         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 362                         return 0;
 363                 }
 364
 365                 /*
 366                  *      Yank the request, free the old Id, and
 367                  *      remember the new Id.
 368                  */
 369                 fr_packet_list_yank(proxy_list, request->proxy);
 370                 fr_packet_list_id_free(proxy_list, request->proxy);
 371                 *request->proxy = packet;
 372
 373         } else if (!proxy_id_alloc(request, request->proxy)) {
 374                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 375                 return 0;
 376         }
 377
 378         rad_assert(request->proxy->sockfd >= 0);
 379
 380         /*
 381          *      FIXME: Hack until we get rid of rad_listen_t, and put
 382          *      the information into the packet_list.
 383          */
 384         proxy = -1;
 385         for (i = 0; i < 32; i++) {
 386                 if (proxy_fds[i] == request->proxy->sockfd) {
 387                         proxy = i;
 388                         break;
 389                 }
 390         }
 391
 392         if (proxy < 0) {
 393                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 394                 RDEBUG2("ERROR: All sockets are full.");
 395                 return 0;
 396         }
 397
 398         rad_assert(proxy_fds[proxy] != -1);
 399         rad_assert(proxy_listeners[proxy] != NULL);
 400         request->proxy_listener = proxy_listeners[proxy];
 401
 402         if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
 403                 fr_packet_list_id_free(proxy_list, request->proxy);
 404                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 405                 RDEBUG2("ERROR: Failed to insert entry into proxy list");
 406                 return 0;
 407         }
 408
 409         request->in_proxy_hash = TRUE;
 410
 411         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 412
 413         RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
 414                inet_ntop(request->proxy->dst_ipaddr.af,
 415                          &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
 416                request->proxy->dst_port,
 417                request->proxy->id);
 418
 419         return 1;
 420 }
 421
 422
 423 /*
 424  *      Called as BOTH an event, and in-line from other functions.
 425  */
 426 static void wait_for_proxy_id_to_expire(void *ctx)
 427 {
 428         REQUEST *request = ctx;
 429
 430         rad_assert(request->magic == REQUEST_MAGIC);
 431         rad_assert(request->proxy != NULL);
 432
 433         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
 434         request->when = request->proxy_when;
 435
 436 #ifdef WITH_COA
 437         if (((request->proxy->code == PW_COA_REQUEST) ||
 438              (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
 439             (request->packet->code != request->proxy->code)) {
 440                 request->when.tv_sec += request->home_server->coa_mrd;
 441         } else
 442 #endif
 443         request->when.tv_sec += request->home_server->response_window;
 444
 445         if ((request->num_proxied_requests == request->num_proxied_responses) ||
 446             timercmp(&now, &request->when, >)) {
 447                 if (request->packet) {
 448                         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 449                                request->number, request->packet->id,
 450                                (unsigned int) (request->timestamp - fr_start_time));
 451                 } else {
 452                         RDEBUG2("Cleaning up request %d with timestamp +%d",
 453                                request->number,
 454                                (unsigned int) (request->timestamp - fr_start_time));
 455                 }
 456
 457                 ev_request_free(&request);
 458                 return;
 459         }
 460
 461         INSERT_EVENT(wait_for_proxy_id_to_expire, request);
 462 }
 463 #endif
 464
 465 #ifdef HAVE_PTHREAD_H
 466 static void wait_for_child_to_die(void *ctx)
 467 {
 468         REQUEST *request = ctx;
 469
 470         rad_assert(request->magic == REQUEST_MAGIC);
 471
 472         if ((request->child_state == REQUEST_QUEUED) |
 473             (request->child_state == REQUEST_RUNNING)) {
 474                 request->delay += (request->delay >> 1);
 475                 tv_add(&request->when, request->delay);
 476
 477                 RDEBUG2("Child is still stuck for request %d", request->number);
 478
 479                 INSERT_EVENT(wait_for_child_to_die, request);
 480                 return;
 481         }
 482
 483         RDEBUG2("Child is finally responsive for request %d", request->number);
 484         remove_from_request_hash(request);
 485
 486 #ifdef WITH_PROXY
 487         if (request->proxy) {
 488                 wait_for_proxy_id_to_expire(request);
 489                 return;
 490         }
 491 #endif
 492
 493         ev_request_free(&request);
 494 }
 495 #endif
 496
 497 static void cleanup_delay(void *ctx)
 498 {
 499         REQUEST *request = ctx;
 500
 501         rad_assert(request->magic == REQUEST_MAGIC);
 502         rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
 503                    (request->child_state == REQUEST_DONE));
 504
 505         remove_from_request_hash(request);
 506
 507 #ifdef WITH_PROXY
 508         if (request->proxy && request->in_proxy_hash) {
 509                 wait_for_proxy_id_to_expire(request);
 510                 return;
 511         }
 512 #endif
 513
 514         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 515                request->number, request->packet->id,
 516                (unsigned int) (request->timestamp - fr_start_time));
 517
 518         ev_request_free(&request);
 519 }
 520
 521
 522 /*
 523  *      FIXME: Put into a libradius function.
 524  */
 525 #define MAX_PACKET_CODE (52)
 526 static const char *packet_codes[] = {
 527   "",
 528   "Access-Request",
 529   "Access-Accept",
 530   "Access-Reject",
 531   "Accounting-Request",
 532   "Accounting-Response",
 533   "Accounting-Status",
 534   "Password-Request",
 535   "Password-Accept",
 536   "Password-Reject",
 537   "Accounting-Message",
 538   "Access-Challenge",
 539   "Status-Server",
 540   "Status-Client",
 541   "14",
 542   "15",
 543   "16",
 544   "17",
 545   "18",
 546   "19",
 547   "20",
 548   "Resource-Free-Request",
 549   "Resource-Free-Response",
 550   "Resource-Query-Request",
 551   "Resource-Query-Response",
 552   "Alternate-Resource-Reclaim-Request",
 553   "NAS-Reboot-Request",
 554   "NAS-Reboot-Response",
 555   "28",
 556   "Next-Passcode",
 557   "New-Pin",
 558   "Terminate-Session",
 559   "Password-Expired",
 560   "Event-Request",
 561   "Event-Response",
 562   "35",
 563   "36",
 564   "37",
 565   "38",
 566   "39",
 567   "Disconnect-Request",
 568   "Disconnect-ACK",
 569   "Disconnect-NAK",
 570   "CoA-Request",
 571   "CoA-ACK",
 572   "CoA-NAK",
 573   "46",
 574   "47",
 575   "48",
 576   "49",
 577   "IP-Address-Allocate",
 578   "IP-Address-Release"
 579 };
 580
 581
 582 /*
 583  *      In daemon mode, AND this request has debug flags set.
 584  */
 585 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
 586
 587 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
 588 {
 589         VALUE_PAIR *vp;
 590         char buffer[1024];
 591         const char *received, *from;
 592         const fr_ipaddr_t *ip;
 593         int port;
 594
 595         if (!packet) return;
 596
 597         rad_assert(debug_flag != 0);
 598         rad_assert(request->radlog != NULL);
 599
 600         if (direction == 0) {
 601                 received = "Received";
 602                 from = "from";  /* what else? */
 603                 ip = &packet->src_ipaddr;
 604                 port = packet->src_port;
 605
 606         } else {
 607                 received = "Sending";
 608                 from = "to";    /* hah! */
 609                 ip = &packet->dst_ipaddr;
 610                 port = packet->dst_port;
 611         }
 612
 613         /*
 614          *      Client-specific debugging re-prints the input
 615          *      packet into the client log.
 616          *
 617          *      This really belongs in a utility library
 618          */
 619         if ((packet->code > 0) && (packet->code < MAX_PACKET_CODE)) {
 620                 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
 621                        received, packet_codes[packet->code], from,
 622                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 623                        port, packet->id, packet->data_len);
 624         } else {
 625                 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
 626                        received, from,
 627                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 628                        port,
 629                        packet->code, packet->id, packet->data_len);
 630         }
 631
 632         for (vp = packet->vps; vp != NULL; vp = vp->next) {
 633                 vp_prints(buffer, sizeof(buffer), vp);
 634                 request->radlog(L_DBG, 0, request, "\t%s", buffer);
 635         }
 636 }
 637
 638 static void reject_delay(void *ctx)
 639 {
 640         REQUEST *request = ctx;
 641
 642         rad_assert(request->magic == REQUEST_MAGIC);
 643         rad_assert(request->child_state == REQUEST_REJECT_DELAY);
 644
 645         RDEBUG2("Sending delayed reject for request %d", request->number);
 646
 647         DEBUG_PACKET(request, request->reply, 1);
 648
 649         request->listener->send(request->listener, request);
 650
 651         request->when.tv_sec += request->root->cleanup_delay;
 652         request->child_state = REQUEST_CLEANUP_DELAY;
 653
 654         INSERT_EVENT(cleanup_delay, request);
 655 }
 656
 657
 658 #ifdef WITH_PROXY
 659 void revive_home_server(void *ctx)
 660 {
 661         home_server *home = ctx;
 662         char buffer[128];
 663
 664         home->state = HOME_STATE_ALIVE;
 665         home->currently_outstanding = 0;
 666         home->revive_time = now;
 667
 668         /*
 669          *      Delete any outstanding events.
 670          */
 671         if (home->ev) fr_event_delete(el, &home->ev);
 672
 673         radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
 674                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 675                          buffer, sizeof(buffer)),
 676                home->port);
 677
 678 }
 679
 680
 681 static void no_response_to_ping(void *ctx)
 682 {
 683         REQUEST *request = ctx;
 684         home_server *home;
 685         char buffer[128];
 686
 687         rad_assert(request->home_server != NULL);
 688
 689         home = request->home_server;
 690         home->num_received_pings = 0;
 691
 692         RDEBUG2("No response to status check %d from home server %s port %d",
 693                request->number,
 694                inet_ntop(request->proxy->dst_ipaddr.af,
 695                          &request->proxy->dst_ipaddr.ipaddr,
 696                          buffer, sizeof(buffer)),
 697                request->proxy->dst_port);
 698
 699         wait_for_proxy_id_to_expire(request);
 700 }
 701
 702
 703 static void received_response_to_ping(REQUEST *request)
 704 {
 705         home_server *home;
 706         char buffer[128];
 707
 708         rad_assert(request->home_server != NULL);
 709
 710         home = request->home_server;
 711         home->num_received_pings++;
 712
 713         RDEBUG2("Received response to status check %d (%d in current sequence)",
 714                request->number, home->num_received_pings);
 715
 716         /*
 717          *      Remove the request from any hashes
 718          */
 719         fr_event_delete(el, &request->ev);
 720         remove_from_proxy_hash(request);
 721         rad_assert(request->in_request_hash == FALSE);
 722
 723         /*
 724          *      The control socket may have marked the home server as
 725          *      alive.  OR, it may have suddenly started responding to
 726          *      requests again.  If so, don't re-do the "make alive"
 727          *      work.
 728          */
 729         if (home->state == HOME_STATE_ALIVE) return;
 730
 731         /*
 732          *      We haven't received enough ping responses to mark it
 733          *      "alive".  Wait a bit.
 734          */
 735         if (home->num_received_pings < home->num_pings_to_alive) {
 736                 return;
 737         }
 738
 739         home->state = HOME_STATE_ALIVE;
 740         home->currently_outstanding = 0;
 741         home->revive_time = now;
 742
 743         if (!fr_event_delete(el, &home->ev)) {
 744                 RDEBUG2("Hmm... no event for home server.  Oh well.");
 745         }
 746
 747         radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
 748                inet_ntop(request->proxy->dst_ipaddr.af,
 749                          &request->proxy->dst_ipaddr.ipaddr,
 750                          buffer, sizeof(buffer)),
 751                request->proxy->dst_port);
 752 }
 753
 754
 755 /*
 756  *      Called from start of zombie period, OR after control socket
 757  *      marks the home server dead.
 758  */
 759 static void ping_home_server(void *ctx)
 760 {
 761         uint32_t jitter;
 762         home_server *home = ctx;
 763         REQUEST *request;
 764         VALUE_PAIR *vp;
 765
 766         if (home->state == HOME_STATE_ALIVE) {
 767                 return;
 768         }
 769
 770         request = request_alloc();
 771         request->number = request_num_counter++;
 772
 773         request->proxy = rad_alloc(1);
 774         rad_assert(request->proxy != NULL);
 775
 776         fr_event_now(el, &request->when);
 777         home->when = request->when;
 778
 779         if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
 780                 request->proxy->code = PW_STATUS_SERVER;
 781
 782                 radius_pairmake(request, &request->proxy->vps,
 783                                 "Message-Authenticator", "0x00", T_OP_SET);
 784
 785         } else if (home->type == HOME_TYPE_AUTH) {
 786                 request->proxy->code = PW_AUTHENTICATION_REQUEST;
 787
 788                 radius_pairmake(request, &request->proxy->vps,
 789                                 "User-Name", home->ping_user_name, T_OP_SET);
 790                 radius_pairmake(request, &request->proxy->vps,
 791                                 "User-Password", home->ping_user_password, T_OP_SET);
 792                 radius_pairmake(request, &request->proxy->vps,
 793                                 "Service-Type", "Authenticate-Only", T_OP_SET);
 794                 radius_pairmake(request, &request->proxy->vps,
 795                                 "Message-Authenticator", "0x00", T_OP_SET);
 796
 797         } else {
 798 #ifdef WITH_ACCOUNTING
 799                 request->proxy->code = PW_ACCOUNTING_REQUEST;
 800
 801                 radius_pairmake(request, &request->proxy->vps,
 802                                 "User-Name", home->ping_user_name, T_OP_SET);
 803                 radius_pairmake(request, &request->proxy->vps,
 804                                 "Acct-Status-Type", "Stop", T_OP_SET);
 805                 radius_pairmake(request, &request->proxy->vps,
 806                                 "Acct-Session-Id", "00000000", T_OP_SET);
 807                 vp = radius_pairmake(request, &request->proxy->vps,
 808                                      "Event-Timestamp", "0", T_OP_SET);
 809                 vp->vp_date = now.tv_sec;
 810 #else
 811                 rad_assert("Internal sanity check failed");
 812 #endif
 813         }
 814
 815         radius_pairmake(request, &request->proxy->vps,
 816                         "NAS-Identifier", "Status Check. Are you alive?",
 817                         T_OP_SET);
 818
 819         request->proxy->dst_ipaddr = home->ipaddr;
 820         request->proxy->dst_port = home->port;
 821         request->home_server = home;
 822
 823         rad_assert(request->proxy_listener == NULL);
 824
 825         if (!insert_into_proxy_hash(request, FALSE)) {
 826                 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash.  Discarding it.",
 827                        request->number);
 828                 ev_request_free(&request);
 829                 return;
 830         }
 831         rad_assert(request->proxy_listener != NULL);
 832         request->proxy_listener->send(request->proxy_listener,
 833                                       request);
 834
 835         request->next_callback = NULL;
 836         request->child_state = REQUEST_PROXIED;
 837         request->when.tv_sec += home->ping_timeout;;
 838
 839         INSERT_EVENT(no_response_to_ping, request);
 840
 841         /*
 842          *      Add +/- 2s of jitter, as suggested in RFC 3539
 843          *      and in the Issues and Fixes draft.
 844          */
 845         home->when.tv_sec += home->ping_interval - 2;
 846
 847         jitter = fr_rand();
 848         jitter ^= (jitter >> 10);
 849         jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
 850
 851         tv_add(&home->when, jitter);
 852
 853         INSERT_EVENT(ping_home_server, home);
 854 }
 855
 856
 857 void mark_home_server_dead(home_server *home, struct timeval *when)
 858 {
 859         int previous_state = home->state;
 860         char buffer[128];
 861
 862         radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
 863                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 864                          buffer, sizeof(buffer)),
 865                home->port);
 866
 867         home->state = HOME_STATE_IS_DEAD;
 868         home->num_received_pings = 0;
 869
 870         if (home->ping_check != HOME_PING_CHECK_NONE) {
 871                 /*
 872                  *      If the control socket marks us dead, start
 873                  *      pinging.  Otherwise, we already started
 874                  *      pinging when it was marked "zombie".
 875                  */
 876                 if (previous_state == HOME_STATE_ALIVE) {
 877                         ping_home_server(home);
 878                 }
 879
 880         } else {
 881                 /*
 882                  *      Revive it after a fixed period of time.  This
 883                  *      is very, very, bad.
 884                  */
 885                 home->when = *when;
 886                 home->when.tv_sec += home->revive_interval;
 887
 888                 INSERT_EVENT(revive_home_server, home);
 889         }
 890 }
 891
 892 static void check_for_zombie_home_server(REQUEST *request)
 893 {
 894         home_server *home;
 895         struct timeval when;
 896
 897         home = request->home_server;
 898
 899         if (home->state != HOME_STATE_ZOMBIE) return;
 900
 901         when = home->zombie_period_start;
 902         when.tv_sec += home->zombie_period;
 903
 904         fr_event_now(el, &now);
 905         if (timercmp(&now, &when, <)) {
 906                 return;
 907         }
 908
 909         mark_home_server_dead(home, &request->when);
 910 }
 911
 912 static int proxy_to_virtual_server(REQUEST *request);
 913
 914 static int virtual_server_handler(UNUSED REQUEST *request)
 915 {
 916         proxy_to_virtual_server(request);
 917         return 0;
 918 }
 919
 920 static void proxy_fallback_handler(REQUEST *request)
 921 {
 922         /*
 923          *      A proper time is required for wait_a_bit.
 924          */
 925         request->delay = USEC / 10;
 926         gettimeofday(&now, NULL);
 927         request->next_when = now;
 928         tv_add(&request->next_when, request->delay);
 929         request->next_callback = wait_a_bit;
 930
 931         /*
 932          *      Re-queue the request.
 933          */
 934         request->child_state = REQUEST_QUEUED;
 935
 936         rad_assert(request->proxy != NULL);
 937         if (!thread_pool_addrequest(request, virtual_server_handler)) {
 938                 request->child_state = REQUEST_DONE;
 939         }
 940
 941 #ifdef HAVE_PTHREAD_H
 942         /*
 943          *      MAY free the request if we're over max_request_time,
 944          *      AND we're not in threaded mode!
 945          *
 946          *      Note that we call this ONLY if we're threaded, as
 947          *      if we're NOT threaded, request_post_handler() calls
 948          *      wait_a_bit(), which means that "request" may not
 949          *      exist any more...
 950          */
 951         if (have_children) wait_a_bit(request);
 952 #endif
 953 }
 954
 955
 956 static int setup_post_proxy_fail(REQUEST *request)
 957 {
 958         DICT_VALUE *dval = NULL;
 959         VALUE_PAIR *vp;
 960
 961         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 962                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 963
 964         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 965                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 966
 967 #ifdef WITH_COA
 968                 /*
 969                  *      See no_response_to_coa_request
 970                  */
 971         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 972                 request->packet->code &= 0xff; /* restore it */
 973
 974                 if (request->proxy->code == PW_COA_REQUEST) {
 975                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 976
 977                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 978                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 979                 } else {
 980                         return 0;
 981                 }
 982
 983 #endif
 984         } else {
 985                 return 0;
 986         }
 987
 988         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 989
 990         if (!dval) {
 991                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 992                 return 0;
 993         }
 994
 995         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 996         if (!vp) vp = radius_paircreate(request, &request->config_items,
 997                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
 998         vp->vp_integer = dval->value;
 999
1000         rad_assert(request->proxy_reply == NULL);
1001
1002         return 1;
1003 }
1004
1005
1006 static int null_handler(UNUSED REQUEST *request)
1007 {
1008         return 0;
1009 }
1010
1011 static void post_proxy_fail_handler(REQUEST *request)
1012 {
1013         /*
1014          *      A proper time is required for wait_a_bit.
1015          */
1016         request->delay = USEC / 10;
1017         gettimeofday(&now, NULL);
1018
1019         /*
1020          *      Not set up to run Post-Proxy-Type = Fail.
1021          *
1022          *      Mark the request as still running, and figure out what
1023          *      to do next.
1024          */
1025         if (!setup_post_proxy_fail(request)) {
1026                 request->child_state = REQUEST_RUNNING;
1027                 request_post_handler(request);
1028
1029         } else {
1030                 /*
1031                  *      Re-queue the request.
1032                  */
1033                 request->child_state = REQUEST_QUEUED;
1034
1035                 /*
1036                  *      There is a post-proxy-type of fail.  We run
1037                  *      the request through the pre/post proxy
1038                  *      handlers, just like it was a real proxied
1039                  *      request.  However, we set the per-request
1040                  *      handler to NULL, as we don't want to do
1041                  *      anything else.
1042                  *
1043                  *      Note that when we're not threaded, this will
1044                  *      process the request even if it's greater than
1045                  *      max_request_time.  That's not fatal.
1046                  */
1047                 request->priority = 0;
1048                 rad_assert(request->proxy != NULL);
1049                 thread_pool_addrequest(request, null_handler);
1050         }
1051
1052         /*
1053          *      MAY free the request if we're over max_request_time,
1054          *      AND we're not in threaded mode!
1055          *
1056          *      Note that we call this ONLY if we're threaded, as
1057          *      if we're NOT threaded, request_post_handler() calls
1058          *      wait_a_bit(), which means that "request" may not
1059          *      exist any more...
1060          */
1061         if (have_children) wait_a_bit(request);
1062 }
1063
1064
1065 /* maybe check this against wait_for_proxy_id_to_expire? */
1066 static void no_response_to_proxied_request(void *ctx)
1067 {
1068         REQUEST *request = ctx;
1069         home_server *home;
1070         char buffer[128];
1071
1072         rad_assert(request->magic == REQUEST_MAGIC);
1073         rad_assert(request->child_state == REQUEST_PROXIED);
1074
1075         /*
1076          *      If we've failed over to an internal home server,
1077          *      replace the callback with the correct one.  This
1078          *      is due to locking issues with child threads...
1079          */
1080         if (request->home_server->server) {
1081                 wait_a_bit(request);
1082                 return;
1083         }
1084
1085         radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1086                request->number,
1087                inet_ntop(request->proxy->dst_ipaddr.af,
1088                          &request->proxy->dst_ipaddr.ipaddr,
1089                          buffer, sizeof(buffer)),
1090                request->proxy->dst_port);
1091
1092         check_for_zombie_home_server(request);
1093
1094         home = request->home_server;
1095
1096         post_proxy_fail_handler(request);
1097
1098         /*
1099          *      Don't touch request due to race conditions
1100          */
1101         if (home->state == HOME_STATE_IS_DEAD) {
1102                 rad_assert(home->ev != NULL); /* or it will never wake up */
1103                 return;
1104         }
1105
1106         /*
1107          *      Enable the zombie period when we notice that the home
1108          *      server hasn't responded.  We do NOT back-date the start
1109          *      of the zombie period.
1110          */
1111         if (home->state == HOME_STATE_ALIVE) {
1112                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1113                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1114                                  buffer, sizeof(buffer)),
1115                        home->port);
1116                 home->state = HOME_STATE_ZOMBIE;
1117                 home->zombie_period_start = now;
1118
1119                 /*
1120                  *      Start pinging the home server.
1121                  */
1122                 ping_home_server(home);
1123         }
1124 }
1125 #endif
1126
1127 static void wait_a_bit(void *ctx)
1128 {
1129         struct timeval when;
1130         REQUEST *request = ctx;
1131         fr_event_callback_t callback = NULL;
1132
1133         rad_assert(request->magic == REQUEST_MAGIC);
1134
1135 #ifdef WITH_COA
1136         /*
1137          *      The CoA request is a new (internally generated)
1138          *      request, created in a child thread.  We therefore need
1139          *      some way to tie its events back into the main event
1140          *      handler.
1141          */
1142         if (request->coa && !request->coa->proxy_reply &&
1143             request->coa->next_callback) {
1144                 request->coa->when = request->coa->next_when;
1145                 INSERT_EVENT(request->coa->next_callback, request->coa);
1146                 request->coa->next_callback = NULL;
1147                 request->coa->parent = NULL;
1148                 request->coa = NULL;
1149         }
1150 #endif
1151
1152         switch (request->child_state) {
1153         case REQUEST_QUEUED:
1154         case REQUEST_RUNNING:
1155                 when = request->received;
1156                 when.tv_sec += request->root->max_request_time;
1157
1158                 /*
1159                  *      Normally called from the event loop with the
1160                  *      proper event loop time.  Otherwise, called from
1161                  *      post proxy fail handler, which sets "now", and
1162                  *      this call won't re-set it, because we're not
1163                  *      in the event loop.
1164                  */
1165                 fr_event_now(el, &now);
1166
1167                 /*
1168                  *      Request still has more time.  Continue
1169                  *      waiting.
1170                  */
1171                 if (timercmp(&now, &when, <) ||
1172                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1173                      (request->child_state == REQUEST_QUEUED))) {
1174                         if (request->delay < (USEC / 10)) {
1175                                 request->delay = USEC / 10;
1176                         }
1177                         request->delay += request->delay >> 1;
1178
1179 #ifdef WITH_DETAIL
1180                         /*
1181                          *      Cap wait at some sane value for detail
1182                          *      files.
1183                          */
1184                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1185                             (request->delay > (request->root->max_request_time * USEC))) {
1186                                 request->delay = request->root->max_request_time * USEC;
1187                         }
1188 #endif
1189
1190                         request->when = now;
1191                         tv_add(&request->when, request->delay);
1192                         callback = wait_a_bit;
1193                         break;
1194                 }
1195
1196 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1197                 /*
1198                  *      A child thread MAY still be running on the
1199                  *      request.  Ask the thread to stop working on
1200                  *      the request.
1201                  */
1202                 if (have_children) {
1203                         /* FIXME: kill unresponsive children? */
1204
1205                         /*
1206                          *      Print this error message ONLY if
1207                          *      there's a child currently processing
1208                          *      the request.  As we don't have thread
1209                          *      locks here, there may be race
1210                          *      conditions on this check.  But it's
1211                          *      just an error message, so that's OK.
1212                          */
1213                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1214                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1215                                        request->number,
1216                                        request->module ? request->module : "<server core>",
1217                                        request->component ? request->component : "<server core>");
1218                         }
1219
1220                         request->master_state = REQUEST_STOP_PROCESSING;
1221
1222                         request->delay = USEC / 4;
1223                         tv_add(&request->when, request->delay);
1224                         callback = wait_for_child_to_die;
1225                         break;
1226                 }
1227 #endif
1228
1229                 /*
1230                  *      Else there are no child threads.  We probably
1231                  *      should have just marked the request as 'done'
1232                  *      elsewhere, like in the post-proxy-fail
1233                  *      handler.  But doing that would involve
1234                  *      checking for max_request_time in multiple
1235                  *      places, so this may be simplest.
1236                  */
1237                 request->child_state = REQUEST_DONE;
1238                 /* FALL-THROUGH */
1239
1240                 /*
1241                  *      Mark the request as no longer running,
1242                  *      and clean it up.
1243                  */
1244         case REQUEST_DONE:
1245 #ifdef HAVE_PTHREAD_H
1246                 request->child_pid = NO_SUCH_CHILD_PID;
1247 #endif
1248
1249 #ifdef WTH_COA
1250                 /*
1251                  *      This is a CoA request.  It's been divorced
1252                  *      from everything else, so we clean it up now.
1253                  */
1254                 if (!request->in_request_hash &&
1255                     request->proxy &&
1256                     (request->packet->code != request->proxy->code) &&
1257                     ((request->proxy->code == PW_COA_REQUEST) ||
1258                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1259                         /*
1260                          *      FIXME: Do CoA MIBs
1261                          */
1262                         ev_request_free(&request);
1263                         return;
1264                 }
1265 #endif
1266                 request_stats_final(request);
1267                 cleanup_delay(request);
1268                 return;
1269
1270         case REQUEST_REJECT_DELAY:
1271         case REQUEST_CLEANUP_DELAY:
1272 #ifdef HAVE_PTHREAD_H
1273                 request->child_pid = NO_SUCH_CHILD_PID;
1274 #endif
1275                 request_stats_final(request);
1276
1277         case REQUEST_PROXIED:
1278                 rad_assert(request->next_callback != NULL);
1279                 rad_assert(request->next_callback != wait_a_bit);
1280
1281                 request->when = request->next_when;
1282                 callback = request->next_callback;
1283                 request->next_callback = NULL;
1284                 break;
1285
1286         default:
1287                 rad_panic("Internal sanity check failure");
1288                 return;
1289         }
1290
1291         /*
1292          *      Something major went wrong.  Discard the request, and
1293          *      keep running.
1294          *
1295          *      FIXME: No idea why this happens or how to fix it...
1296          *      It seems to happen *only* when requests are proxied,
1297          *      and where the home server doesn't respond.  So it looks
1298          *      like a race condition above, but it happens in debug
1299          *      mode, with no threads...
1300          */
1301         if (!callback) {
1302                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1303                 ev_request_free(&request);
1304                 return;
1305         }
1306
1307         INSERT_EVENT(callback, request);
1308 }
1309
1310 #ifdef WITH_COA
1311 static void no_response_to_coa_request(void *ctx)
1312 {
1313         REQUEST *request = ctx;
1314         char buffer[128];
1315
1316         rad_assert(request->magic == REQUEST_MAGIC);
1317         rad_assert(request->child_state == REQUEST_PROXIED);
1318         rad_assert(request->home_server != NULL);
1319         rad_assert(!request->in_request_hash);
1320
1321         radlog(L_ERR, "No response to CoA request sent to %s",
1322                inet_ntop(request->proxy->dst_ipaddr.af,
1323                          &request->proxy->dst_ipaddr.ipaddr,
1324                          buffer, sizeof(buffer)));
1325
1326         /*
1327          *      Hack.
1328          */
1329         request->packet->code |= (PW_COA_REQUEST << 8);
1330         post_proxy_fail_handler(request);
1331 }
1332
1333
1334 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1335 {
1336         VALUE_PAIR *vp;
1337
1338         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1339         if (!vp) return 0;
1340
1341         vp->vp_date = when;
1342
1343         if (packet->data) {
1344                 free(packet->data);
1345                 packet->data = NULL;
1346                 packet->data_len = 0;
1347         }
1348
1349         return 1;               /* time stamp updated */
1350 }
1351
1352
1353 /*
1354  *      Called when we haven't received a response to a CoA request.
1355  */
1356 static void retransmit_coa_request(void *ctx)
1357 {
1358         int delay, frac;
1359         struct timeval mrd;
1360         REQUEST *request = ctx;
1361
1362         rad_assert(request->magic == REQUEST_MAGIC);
1363         rad_assert(request->child_state == REQUEST_PROXIED);
1364         rad_assert(request->home_server != NULL);
1365         rad_assert(!request->in_request_hash);
1366         rad_assert(request->parent == NULL);
1367
1368         fr_event_now(el, &now);
1369
1370         /*
1371          *      Cap count at MRC, if it is non-zero.
1372          */
1373         if (request->home_server->coa_mrc &&
1374             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1375                 no_response_to_coa_request(request);
1376                 return;
1377         }
1378
1379         /*
1380          *      RFC 5080 Section 2.2.1
1381          *
1382          *      RT = 2*RTprev + RAND*RTprev
1383          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1384          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1385          */
1386         delay = fr_rand();
1387         delay ^= (delay >> 16);
1388         delay &= 0xffff;
1389         frac = request->delay / 5;
1390         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1391
1392         delay += (2 * request->delay) - (request->delay / 10);
1393
1394         /*
1395          *      Cap delay at MRT, if MRT is non-zero.
1396          */
1397         if (request->home_server->coa_mrt &&
1398             (delay > (request->home_server->coa_mrt * USEC))) {
1399                 int mrt_usec = request->home_server->coa_mrt * USEC;
1400
1401                 /*
1402                  *      delay = MRT + RAND * MRT
1403                  *            = 0.9 MRT + rand(0,.2)  * MRT
1404                  */
1405                 delay = fr_rand();
1406                 delay ^= (delay >> 15);
1407                 delay &= 0x1ffff;
1408                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1409                 delay += mrt_usec - (mrt_usec / 10);
1410         }
1411
1412         request->delay = delay;
1413         request->when = now;
1414         tv_add(&request->when, request->delay);
1415         mrd = request->proxy_when;
1416         mrd.tv_sec += request->home_server->coa_mrd;
1417
1418         /*
1419          *      Cap duration at MRD.
1420          */
1421         if (timercmp(&mrd, &request->when, <)) {
1422                 request->when = mrd;
1423                 INSERT_EVENT(no_response_to_coa_request, request);
1424
1425         } else {
1426                 INSERT_EVENT(retransmit_coa_request, request);
1427         }
1428
1429         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1430                 if (!insert_into_proxy_hash(request, TRUE)) {
1431                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1432                         return;
1433                 }
1434
1435                 request->num_proxied_requests = 0;
1436                 request->num_proxied_responses = 0;
1437         }
1438
1439         request->num_proxied_requests++;
1440         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1441
1442         request->proxy_listener->send(request->proxy_listener,
1443                                       request);
1444 }
1445
1446
1447 /*
1448  *      The original request is either DONE, or in CLEANUP_DELAY.
1449  */
1450 static int originated_coa_request(REQUEST *request)
1451 {
1452         int delay, rcode, pre_proxy_type = 0;
1453         VALUE_PAIR *vp;
1454         REQUEST *coa;
1455         fr_ipaddr_t ipaddr;
1456         char buffer[256];
1457
1458         rad_assert(request->proxy == NULL);
1459         rad_assert(!request->in_proxy_hash);
1460         rad_assert(request->proxy_reply == NULL);
1461
1462         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1463         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1464         if (vp) {
1465                 if (vp->vp_integer == 0) {
1466                         ev_request_free(&request->coa);
1467                         return 1;       /* success */
1468                 }
1469
1470                 if (!request->coa) request_alloc_coa(request);
1471                 if (!request->coa) return 0;
1472         }
1473
1474         coa = request->coa;
1475
1476         /*
1477          *      src_ipaddr will be set up in proxy_encode.
1478          */
1479         memset(&ipaddr, 0, sizeof(ipaddr));
1480         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1481         if (vp) {
1482                 ipaddr.af = AF_INET;
1483                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1484
1485         } else if ((vp = pairfind(coa->proxy->vps,
1486                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1487                 ipaddr.af = AF_INET6;
1488                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1489
1490         } else if ((vp = pairfind(coa->proxy->vps,
1491                                   PW_HOME_SERVER_POOL)) != NULL) {
1492                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1493                                                   HOME_TYPE_COA);
1494                 if (!coa->home_pool) {
1495                         RDEBUG2("WARNING: No such home_server_pool %s",
1496                                vp->vp_strvalue);
1497         fail:
1498                         ev_request_free(&request->coa);
1499                         return 0;
1500                 }
1501
1502                 /*
1503                  *      Prefer
1504                  */
1505         } else if (request->client->coa_pool) {
1506                 coa->home_pool = request->client->coa_pool;
1507
1508         } else if (request->client->coa_server) {
1509                 coa->home_server = request->client->coa_server;
1510
1511         } else {
1512                 /*
1513                  *      If all else fails, send it to the client that
1514                  *      originated this request.
1515                  */
1516                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1517         }
1518
1519         /*
1520          *      Use the pool, if it exists.
1521          */
1522         if (coa->home_pool) {
1523                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1524                 if (!coa->home_server) {
1525                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1526                         goto fail;
1527                 }
1528
1529         } else if (!coa->home_server) {
1530                 int port = PW_COA_UDP_PORT;
1531
1532                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1533                 if (vp) port = vp->vp_integer;
1534
1535                 coa->home_server = home_server_find(&ipaddr, port);
1536                 if (!coa->home_server) {
1537                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1538                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1539                                          buffer, sizeof(buffer)), port);
1540                         goto fail;
1541                 }
1542         }
1543
1544         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1545         if (vp) {
1546                 switch (vp->vp_integer) {
1547                 case PW_COA_REQUEST:
1548                 case PW_DISCONNECT_REQUEST:
1549                         coa->proxy->code = vp->vp_integer;
1550                         break;
1551
1552                 default:
1553                         DEBUG("Cannot set CoA Packet-Type to code %d",
1554                               vp->vp_integer);
1555                         goto fail;
1556                 }
1557         }
1558
1559         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1560
1561         /*
1562          *      The rest of the server code assumes that
1563          *      request->packet && request->reply exist.  Copy them
1564          *      from the original request.
1565          */
1566         rad_assert(coa->packet != NULL);
1567         rad_assert(coa->packet->vps == NULL);
1568         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1569         coa->packet->vps = paircopy(request->packet->vps);
1570         coa->packet->data = NULL;
1571         rad_assert(coa->reply != NULL);
1572         rad_assert(coa->reply->vps == NULL);
1573         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1574         coa->reply->vps = paircopy(request->reply->vps);
1575         coa->reply->data = NULL;
1576         coa->config_items = paircopy(request->config_items);
1577
1578         /*
1579          *      Call the pre-proxy routines.
1580          */
1581         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1582         if (vp) {
1583                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1584                 pre_proxy_type = vp->vp_integer;
1585         }
1586
1587         if (coa->home_pool && coa->home_pool->virtual_server) {
1588                 const char *old_server = coa->server;
1589
1590                 coa->server = coa->home_pool->virtual_server;
1591                 RDEBUG2(" server %s {", coa->server);
1592                 rcode = module_pre_proxy(pre_proxy_type, coa);
1593                 RDEBUG2(" }");
1594                 coa->server = old_server;
1595         } else {
1596                 rcode = module_pre_proxy(pre_proxy_type, coa);
1597         }
1598         switch (rcode) {
1599         default:
1600                 goto fail;
1601
1602         /*
1603          *      Only send the CoA packet if the pre-proxy code succeeded.
1604          */
1605         case RLM_MODULE_NOOP:
1606         case RLM_MODULE_OK:
1607         case RLM_MODULE_UPDATED:
1608                 break;
1609         }
1610
1611         /*
1612          *      Source IP / port is set when the proxy socket
1613          *      is chosen.
1614          */
1615         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1616         coa->proxy->dst_port = coa->home_server->port;
1617
1618         if (!insert_into_proxy_hash(coa, FALSE)) {
1619                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1620                 goto fail;
1621         }
1622
1623         /*
1624          *      We CANNOT divorce the CoA request from the parent
1625          *      request.  This function is running in a child thread,
1626          *      and we need access to the main event loop in order to
1627          *      to add the timers for the CoA packet.  See
1628          *      wait_a_bit().
1629          */
1630
1631         /*
1632          *      Forget about the original request completely at this
1633          *      point.
1634          */
1635         request = coa;
1636
1637         gettimeofday(&request->proxy_when, NULL);
1638         request->received = request->next_when = request->proxy_when;
1639         rad_assert(request->proxy_reply == NULL);
1640
1641         /*
1642          *      Implement re-transmit algorithm as per RFC 5080
1643          *      Section 2.2.1.
1644          *
1645          *      We want IRT + RAND*IRT
1646          *      or 0.9 IRT + rand(0,.2) IRT
1647          *
1648          *      2^20 ~ USEC, and we want 2.
1649          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1650          */
1651         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1652         request->delay = delay * request->home_server->coa_irt;
1653         delay = request->home_server->coa_irt * USEC;
1654         delay -= delay / 10;
1655         delay += request->delay;
1656
1657         request->delay = delay;
1658         tv_add(&request->next_when, delay);
1659         request->next_callback = retransmit_coa_request;
1660
1661         /*
1662          *      Note that we set proxied BEFORE sending the packet.
1663          *
1664          *      Once we send it, the request is tainted, as
1665          *      another thread may have picked it up.  Don't
1666          *      touch it!
1667          */
1668         request->num_proxied_requests = 1;
1669         request->num_proxied_responses = 0;
1670         request->child_pid = NO_SUCH_CHILD_PID;
1671
1672         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1673
1674         request->child_state = REQUEST_PROXIED;
1675
1676         DEBUG_PACKET(request, request->proxy, 1);
1677
1678         request->proxy_listener->send(request->proxy_listener,
1679                                       request);
1680         return 1;
1681 }
1682 #endif  /* WITH_COA */
1683
1684 #ifdef WITH_PROXY
1685 static int process_proxy_reply(REQUEST *request)
1686 {
1687         int rcode;
1688         int post_proxy_type = 0;
1689         VALUE_PAIR *vp;
1690
1691         /*
1692          *      Delete any reply we had accumulated until now.
1693          */
1694         pairfree(&request->reply->vps);
1695
1696         /*
1697          *      Run the packet through the post-proxy stage,
1698          *      BEFORE playing games with the attributes.
1699          */
1700         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1701         if (vp) {
1702                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1703                 post_proxy_type = vp->vp_integer;
1704         }
1705
1706         if (request->home_pool && request->home_pool->virtual_server) {
1707                 const char *old_server = request->server;
1708
1709                 request->server = request->home_pool->virtual_server;
1710                 RDEBUG2(" server %s {", request->server);
1711                 rcode = module_post_proxy(post_proxy_type, request);
1712                 RDEBUG2(" }");
1713                 request->server = old_server;
1714         } else {
1715                 rcode = module_post_proxy(post_proxy_type, request);
1716         }
1717
1718 #ifdef WITH_COA
1719         if (request->packet->code == request->proxy->code)
1720           /*
1721            *    Don't run the next bit if we originated a CoA
1722            *    packet, after receiving an Access-Request or
1723            *    Accounting-Request.
1724            */
1725 #endif
1726
1727         /*
1728          *      There may NOT be a proxy reply, as we may be
1729          *      running Post-Proxy-Type = Fail.
1730          */
1731         if (request->proxy_reply) {
1732                 /*
1733                  *      Delete the Proxy-State Attributes from
1734                  *      the reply.  These include Proxy-State
1735                  *      attributes from us and remote server.
1736                  */
1737                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1738
1739                 /*
1740                  *      Add the attributes left in the proxy
1741                  *      reply to the reply list.
1742                  */
1743                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1744                 request->proxy_reply->vps = NULL;
1745
1746                 /*
1747                  *      Free proxy request pairs.
1748                  */
1749                 pairfree(&request->proxy->vps);
1750         }
1751
1752         switch (rcode) {
1753         default:  /* Don't do anything */
1754                 break;
1755         case RLM_MODULE_FAIL:
1756                 /* FIXME: debug print stuff */
1757                 request->child_state = REQUEST_DONE;
1758                 return 0;
1759
1760         case RLM_MODULE_HANDLED:
1761                 /* FIXME: debug print stuff */
1762                 request->child_state = REQUEST_DONE;
1763                 return 0;
1764         }
1765
1766         return 1;
1767 }
1768 #endif
1769
1770 static int request_pre_handler(REQUEST *request)
1771 {
1772         int rcode;
1773
1774         rad_assert(request->magic == REQUEST_MAGIC);
1775         rad_assert(request->packet != NULL);
1776
1777         request->child_state = REQUEST_RUNNING;
1778
1779         /*
1780          *      Don't decode the packet if it's an internal "fake"
1781          *      request.  Instead, just return so that the caller can
1782          *      process it.
1783          */
1784         if (request->packet->dst_port == 0) {
1785                 request->username = pairfind(request->packet->vps,
1786                                              PW_USER_NAME);
1787                 request->password = pairfind(request->packet->vps,
1788                                              PW_USER_PASSWORD);
1789                 return 1;
1790         }
1791
1792 #ifdef WITH_PROXY
1793         /*
1794          *      Put the decoded packet into it's proper place.
1795          */
1796         if (request->proxy_reply != NULL) {
1797                 rcode = request->proxy_listener->decode(request->proxy_listener,
1798                                                         request);
1799                 DEBUG_PACKET(request, request->proxy_reply, 0);
1800         } else
1801 #endif
1802         if (request->packet->vps == NULL) {
1803                 rcode = request->listener->decode(request->listener, request);
1804
1805                 if (debug_condition) {
1806                         int result = FALSE;
1807                         const char *my_debug = debug_condition;
1808
1809                         /*
1810                          *      Ignore parse errors.
1811                          */
1812                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1813                                                   &my_debug, 1,
1814                                                   &result);
1815                         if (result) {
1816                                 request->options = 2;
1817                                 request->radlog = radlog_request;
1818                         }
1819                 }
1820
1821                 DEBUG_PACKET(request, request->packet, 0);
1822         } else {
1823                 rcode = 0;
1824         }
1825
1826         if (rcode < 0) {
1827                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1828                 request->child_state = REQUEST_DONE;
1829                 return 0;
1830         }
1831
1832         if (!request->username) {
1833                 request->username = pairfind(request->packet->vps,
1834                                              PW_USER_NAME);
1835         }
1836
1837 #ifdef WITH_PROXY
1838         if (request->proxy) {
1839                 return process_proxy_reply(request);
1840 #endif
1841         }
1842
1843         return 1;
1844 }
1845
1846
1847 #ifdef WITH_PROXY
1848 /*
1849  *      Do state handling when we proxy a request.
1850  */
1851 static int proxy_request(REQUEST *request)
1852 {
1853         struct timeval when;
1854         char buffer[128];
1855
1856         if (request->home_server->server) {
1857                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1858                 return 0;
1859         }
1860
1861         if (!insert_into_proxy_hash(request, FALSE)) {
1862                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1863                 return 0;
1864         }
1865
1866         request->proxy_listener->encode(request->proxy_listener, request);
1867
1868         when = request->received;
1869         when.tv_sec += request->root->max_request_time;
1870
1871         gettimeofday(&request->proxy_when, NULL);
1872
1873         request->next_when = request->proxy_when;
1874         request->next_when.tv_sec += request->home_server->response_window;
1875
1876         rad_assert(request->home_server->response_window > 0);
1877
1878         if (timercmp(&when, &request->next_when, <)) {
1879                 request->next_when = when;
1880         }
1881         request->next_callback = no_response_to_proxied_request;
1882
1883         RDEBUG2("Proxying request %d to home server %s port %d",
1884                request->number,
1885                inet_ntop(request->proxy->dst_ipaddr.af,
1886                          &request->proxy->dst_ipaddr.ipaddr,
1887                          buffer, sizeof(buffer)),
1888                request->proxy->dst_port);
1889
1890         /*
1891          *      Note that we set proxied BEFORE sending the packet.
1892          *
1893          *      Once we send it, the request is tainted, as
1894          *      another thread may have picked it up.  Don't
1895          *      touch it!
1896          */
1897         request->num_proxied_requests = 1;
1898         request->num_proxied_responses = 0;
1899 #ifdef HAVE_PTHREAD_H
1900         request->child_pid = NO_SUCH_CHILD_PID;
1901 #endif
1902         request->child_state = REQUEST_PROXIED;
1903
1904         DEBUG_PACKET(request, request->proxy, 1);
1905
1906         request->proxy_listener->send(request->proxy_listener,
1907                                       request);
1908         return 1;
1909 }
1910
1911
1912 /*
1913  *      "Proxy" the request by sending it to a new virtual server.
1914  */
1915 static int proxy_to_virtual_server(REQUEST *request)
1916 {
1917         REQUEST *fake;
1918         RAD_REQUEST_FUNP fun;
1919
1920         if (!request->home_server || !request->home_server->server) return 0;
1921
1922         if (request->parent) {
1923                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1924                 return 0;
1925         }
1926
1927         fake = request_alloc_fake(request);
1928         if (!fake) {
1929                 RDEBUG2("WARNING: Out of memory");
1930                 return 0;
1931         }
1932
1933         fake->packet->vps = paircopy(request->proxy->vps);
1934         fake->server = request->home_server->server;
1935
1936         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1937                 fun = rad_authenticate;
1938
1939 #ifdef WITH_ACCOUNTING
1940         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1941                 fun = rad_accounting;
1942 #endif
1943
1944         } else {
1945                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1946                 ev_request_free(&fake);
1947                 return 0;
1948         }
1949
1950         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1951         radius_handle_request(fake, fun);
1952         RDEBUG2("<<< Received proxied response from internal virtual server.");
1953
1954         request->proxy_reply = fake->reply;
1955         fake->reply = NULL;
1956
1957         ev_request_free(&fake);
1958
1959         process_proxy_reply(request);
1960
1961         if (request->server) RDEBUG("server %s {",
1962                                     request->server != NULL ?
1963                                     request->server : "");
1964         fun(request);
1965
1966         if (request->server) RDEBUG("} # server %s",
1967                                     request->server != NULL ?
1968                                     request->server : "");
1969
1970         return 2;               /* success, but NOT '1' !*/
1971 }
1972
1973 /*
1974  *      Return 1 if we did proxy it, or the proxy attempt failed
1975  *      completely.  Either way, the caller doesn't touch the request
1976  *      any more if we return 1.
1977  */
1978 static int successfully_proxied_request(REQUEST *request)
1979 {
1980         int rcode;
1981         int pre_proxy_type = 0;
1982         VALUE_PAIR *realmpair;
1983         VALUE_PAIR *strippedname;
1984         VALUE_PAIR *vp;
1985         char *realmname = NULL;
1986         home_server *home;
1987         REALM *realm = NULL;
1988         home_pool_t *pool;
1989
1990         /*
1991          *      If it was already proxied, do nothing.
1992          *
1993          *      FIXME: This should really be a serious error.
1994          */
1995         if (request->in_proxy_hash ||
1996             (request->proxy_reply && (request->proxy_reply->code != 0))) {
1997                 return 0;
1998         }
1999
2000         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2001         if (!realmpair || (realmpair->length == 0)) {
2002                 int pool_type;
2003
2004                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2005                 if (!vp) return 0;
2006
2007                 switch (request->packet->code) {
2008                 case PW_AUTHENTICATION_REQUEST:
2009                         pool_type = HOME_TYPE_AUTH;
2010                         break;
2011
2012 #ifdef WITH_ACCOUNTING
2013                 case PW_ACCOUNTING_REQUEST:
2014                         pool_type = HOME_TYPE_ACCT;
2015                         break;
2016 #endif
2017
2018 #ifdef WITH_COA
2019                 case PW_COA_REQUEST:
2020                 case PW_DISCONNECT_REQUEST:
2021                         pool_type = HOME_TYPE_COA;
2022                         break;
2023 #endif
2024
2025                 default:
2026                         return 0;
2027                 }
2028
2029                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2030                 if (!pool) {
2031                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2032                                 vp->vp_strvalue);
2033                         return 0;
2034                 }
2035
2036                 realmname = NULL; /* no realms */
2037                 realm = NULL;
2038                 goto found_pool;
2039         }
2040
2041         realmname = (char *) realmpair->vp_strvalue;
2042
2043         realm = realm_find2(realmname);
2044         if (!realm) {
2045                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2046                 return 0;
2047         }
2048
2049         /*
2050          *      Figure out which pool to use.
2051          */
2052         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2053                 pool = realm->auth_pool;
2054
2055 #ifdef WITH_ACCOUNTING
2056         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2057                 pool = realm->acct_pool;
2058 #endif
2059
2060 #ifdef WITH_COA
2061         } else if ((request->packet->code == PW_COA_REQUEST) ||
2062                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2063                 pool = realm->acct_pool;
2064 #endif
2065
2066         } else {
2067                 rad_panic("Internal sanity check failed");
2068         }
2069
2070         if (!pool) {
2071                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2072                        realmname);
2073                 return 0;
2074         }
2075
2076 found_pool:
2077         home = home_server_ldb(realmname, pool, request);
2078         if (!home) {
2079                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2080                        realmname);
2081                 return -1;
2082         }
2083         request->home_pool = pool;
2084
2085 #ifdef WITH_COA
2086         /*
2087          *      Once we've decided to proxy a request, we cannot send
2088          *      a CoA packet.  So we free up any CoA packet here.
2089          */
2090         ev_request_free(&request->coa);
2091 #endif
2092         /*
2093          *      Remember that we sent the request to a Realm.
2094          */
2095         if (realmname) pairadd(&request->packet->vps,
2096                                pairmake("Realm", realmname, T_OP_EQ));
2097
2098         /*
2099          *      Strip the name, if told to.
2100          *
2101          *      Doing it here catches the case of proxied tunneled
2102          *      requests.
2103          */
2104         if (realm && (realm->striprealm == TRUE) &&
2105            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2106                 /*
2107                  *      If there's a Stripped-User-Name attribute in
2108                  *      the request, then use THAT as the User-Name
2109                  *      for the proxied request, instead of the
2110                  *      original name.
2111                  *
2112                  *      This is done by making a copy of the
2113                  *      Stripped-User-Name attribute, turning it into
2114                  *      a User-Name attribute, deleting the
2115                  *      Stripped-User-Name and User-Name attributes
2116                  *      from the vps list, and making the new
2117                  *      User-Name the head of the vps list.
2118                  */
2119                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2120                 if (!vp) {
2121                         vp = radius_paircreate(request, NULL,
2122                                                PW_USER_NAME, PW_TYPE_STRING);
2123                         rad_assert(vp != NULL); /* handled by above function */
2124                         /* Insert at the START of the list */
2125                         vp->next = request->proxy->vps;
2126                         request->proxy->vps = vp;
2127                 }
2128                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2129                        sizeof(vp->vp_strvalue));
2130                 vp->length = strippedname->length;
2131
2132                 /*
2133                  *      Do NOT delete Stripped-User-Name.
2134                  */
2135         }
2136
2137         /*
2138          *      If there is no PW_CHAP_CHALLENGE attribute but
2139          *      there is a PW_CHAP_PASSWORD we need to add it
2140          *      since we can't use the request authenticator
2141          *      anymore - we changed it.
2142          */
2143         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2144             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2145             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2146                 vp = radius_paircreate(request, &request->proxy->vps,
2147                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2148                 vp->length = AUTH_VECTOR_LEN;
2149                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2150         }
2151
2152         /*
2153          *      The RFC's say we have to do this, but FreeRADIUS
2154          *      doesn't need it.
2155          */
2156         vp = radius_paircreate(request, &request->proxy->vps,
2157                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2158         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2159                  request->packet->id);
2160         vp->length = strlen(vp->vp_strvalue);
2161
2162         /*
2163          *      Should be done BEFORE inserting into proxy hash, as
2164          *      pre-proxy may use this information, or change it.
2165          */
2166         request->proxy->code = request->packet->code;
2167
2168         /*
2169          *      Call the pre-proxy routines.
2170          */
2171         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2172         if (vp) {
2173                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2174                 pre_proxy_type = vp->vp_integer;
2175         }
2176
2177         rad_assert(request->home_pool != NULL);
2178
2179         if (request->home_pool->virtual_server) {
2180                 const char *old_server = request->server;
2181
2182                 request->server = request->home_pool->virtual_server;
2183                 RDEBUG2(" server %s {", request->server);
2184                 rcode = module_pre_proxy(pre_proxy_type, request);
2185                 RDEBUG2(" }");
2186                         request->server = old_server;
2187         } else {
2188                 rcode = module_pre_proxy(pre_proxy_type, request);
2189         }
2190         switch (rcode) {
2191         case RLM_MODULE_FAIL:
2192         case RLM_MODULE_INVALID:
2193         case RLM_MODULE_NOTFOUND:
2194         case RLM_MODULE_USERLOCK:
2195         default:
2196                 /* FIXME: debug print failed stuff */
2197                 return -1;
2198
2199         case RLM_MODULE_REJECT:
2200         case RLM_MODULE_HANDLED:
2201                 return 0;
2202
2203         /*
2204          *      Only proxy the packet if the pre-proxy code succeeded.
2205          */
2206         case RLM_MODULE_NOOP:
2207         case RLM_MODULE_OK:
2208         case RLM_MODULE_UPDATED:
2209                 break;
2210         }
2211
2212         /*
2213          *      If it's a fake request, don't send the proxy
2214          *      packet.  The outer tunnel session will take
2215          *      care of doing that.
2216          */
2217         if (request->packet->dst_port == 0) {
2218                 request->home_server = NULL;
2219                 return 1;
2220         }
2221
2222         if (request->home_server->server) {
2223                 return proxy_to_virtual_server(request);
2224         }
2225
2226         if (!proxy_request(request)) {
2227                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2228                 return -1;
2229         }
2230
2231         return 1;
2232 }
2233 #endif
2234
2235 static void request_post_handler(REQUEST *request)
2236 {
2237         int child_state = -1;
2238         struct timeval when;
2239         VALUE_PAIR *vp;
2240
2241         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2242             (request->parent &&
2243              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2244                 RDEBUG2("Request %d was cancelled.", request->number);
2245 #ifdef HAVE_PTHREAD_H
2246                 request->child_pid = NO_SUCH_CHILD_PID;
2247 #endif
2248                 child_state = REQUEST_DONE;
2249                 goto cleanup;
2250         }
2251
2252         if (request->child_state != REQUEST_RUNNING) {
2253                 rad_panic("Internal sanity check failed");
2254         }
2255
2256 #ifdef WITH_COA
2257         /*
2258          *      If it's not in the request hash, it's a CoA request.
2259          *      We hope.
2260          */
2261         if (!request->in_request_hash &&
2262             request->proxy &&
2263             ((request->proxy->code == PW_COA_REQUEST) ||
2264              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2265                 request->next_callback = NULL;
2266                 child_state = REQUEST_DONE;
2267                 goto cleanup;
2268         }
2269 #endif
2270
2271         if ((request->reply->code == 0) &&
2272             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2273             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2274                 request->reply->code = PW_AUTHENTICATION_REJECT;
2275         }
2276
2277 #ifdef WITH_PROXY
2278         if (request->root->proxy_requests &&
2279             !request->in_proxy_hash &&
2280             (request->reply->code == 0) &&
2281             (request->packet->dst_port != 0) &&
2282             (request->packet->code != PW_STATUS_SERVER)) {
2283                 int rcode = successfully_proxied_request(request);
2284
2285                 if (rcode == 1) return; /* request is invalid */
2286
2287                 /*
2288                  *      Failed proxying it (dead home servers, etc.)
2289                  *      Run it through Post-Proxy-Type = Fail, and
2290                  *      respond to the request.
2291                  *
2292                  *      Note that we're in a child thread here, so we
2293                  *      do NOT re-schedule the request.  Instead, we
2294                  *      do what we would have done, which is run the
2295                  *      pre-handler, a NULL request handler, and then
2296                  *      the post handler.
2297                  */
2298                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2299                         request_pre_handler(request);
2300                 }
2301
2302                 /*
2303                  *      Else we weren't supposed to proxy it,
2304                  *      OR we proxied it internally to a virutal server.
2305                  */
2306         }
2307 #endif
2308
2309         /*
2310          *      Fake requests don't get encoded or signed.  The caller
2311          *      also requires the reply VP's, so we don't free them
2312          *      here!
2313          */
2314         if (request->packet->dst_port == 0) {
2315                 /* FIXME: RDEBUG going to the next request */
2316 #ifdef HAVE_PTHREAD_H
2317                 request->child_pid = NO_SUCH_CHILD_PID;
2318 #endif
2319                 request->child_state = REQUEST_DONE;
2320                 return;
2321         }
2322
2323 #ifdef WITH_PROXY
2324         /*
2325          *      Copy Proxy-State from the request to the reply.
2326          */
2327         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2328         if (vp) pairadd(&request->reply->vps, vp);
2329 #endif
2330
2331         /*
2332          *      Access-Requests get delayed or cached.
2333          */
2334         switch (request->packet->code) {
2335         case PW_AUTHENTICATION_REQUEST:
2336                 gettimeofday(&request->next_when, NULL);
2337
2338                 if (request->reply->code == 0) {
2339                         /*
2340                          *      Check if the lack of response is intentional.
2341                          */
2342                         vp = pairfind(request->config_items,
2343                                       PW_RESPONSE_PACKET_TYPE);
2344                         if (!vp) {
2345                                 RDEBUG2("There was no response configured: rejecting request %d",
2346                                        request->number);
2347                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2348
2349                         } else if (vp->vp_integer == 256) {
2350                                 RDEBUG2("Not responding to request %d",
2351                                        request->number);
2352
2353                                 /*
2354                                  *      Force cleanup after a long
2355                                  *      time, so that we don't
2356                                  *      re-process the packet.
2357                                  */
2358                                 request->next_when.tv_sec += request->root->max_request_time;
2359                                 request->next_callback = cleanup_delay;
2360                                 child_state = REQUEST_CLEANUP_DELAY;
2361                                 break;
2362                         } else {
2363                                 request->reply->code = vp->vp_integer;
2364
2365                         }
2366                 }
2367
2368                 /*
2369                  *      Run rejected packets through
2370                  *
2371                  *      Post-Auth-Type = Reject
2372                  */
2373                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2374                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2375                         vp = radius_pairmake(request, &request->config_items,
2376                                              "Post-Auth-Type", "Reject",
2377                                              T_OP_SET);
2378                         if (vp) rad_postauth(request);
2379
2380                         /*
2381                          *      If configured, delay Access-Reject packets.
2382                          *
2383                          *      If request->root->reject_delay = 0, we discover
2384                          *      that we have to send the packet now.
2385                          */
2386                         when = request->received;
2387                         when.tv_sec += request->root->reject_delay;
2388
2389                         if (timercmp(&when, &request->next_when, >)) {
2390                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2391                                        request->number,
2392                                        request->root->reject_delay);
2393                                 request->next_when = when;
2394                                 request->next_callback = reject_delay;
2395 #ifdef HAVE_PTHREAD_H
2396                                 request->child_pid = NO_SUCH_CHILD_PID;
2397 #endif
2398                                 request->child_state = REQUEST_REJECT_DELAY;
2399                                 return;
2400                         }
2401                 }
2402
2403 #ifdef WITH_COA
2404         case PW_COA_REQUEST:
2405         case PW_DISCONNECT_REQUEST:
2406 #endif
2407                 request->next_when.tv_sec += request->root->cleanup_delay;
2408                 request->next_callback = cleanup_delay;
2409                 child_state = REQUEST_CLEANUP_DELAY;
2410                 break;
2411
2412         case PW_ACCOUNTING_REQUEST:
2413                 request->next_callback = NULL; /* just to be safe */
2414                 child_state = REQUEST_DONE;
2415                 break;
2416
2417                 /*
2418                  *      FIXME: Status-Server should probably not be
2419                  *      handled here...
2420                  */
2421         case PW_STATUS_SERVER:
2422                 request->next_callback = NULL;
2423                 child_state = REQUEST_DONE;
2424                 break;
2425
2426         default:
2427                 if ((request->packet->code > 1024) &&
2428                     (request->packet->code < (1024 + 254 + 1))) {
2429                         request->next_callback = NULL;
2430                         child_state = REQUEST_DONE;
2431                         break;
2432                 }
2433
2434                 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2435                 request->next_callback = NULL;
2436                 child_state = REQUEST_DONE;
2437                 break;
2438         }
2439
2440         /*
2441          *      Suppress "no reply" packets here, unless we're reading
2442          *      from the "detail" file.  In that case, we've got to
2443          *      tell the detail file handler that the request is dead,
2444          *      and it should re-send it.
2445          *      If configured, encode, sign, and send.
2446          */
2447         if ((request->reply->code != 0) ||
2448             (request->listener->type == RAD_LISTEN_DETAIL)) {
2449                 DEBUG_PACKET(request, request->reply, 1);
2450                 request->listener->send(request->listener, request);
2451         }
2452
2453 #ifdef WITH_COA
2454         /*
2455          *      Now that we've completely processed the request,
2456          *      see if we need to originate a CoA request.
2457          */
2458         if (request->coa ||
2459             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2460                 if (!originated_coa_request(request)) {
2461                         RDEBUG2("Do CoA Fail handler here");
2462                 }
2463                 /* request->coa is stil set, so we can update events */
2464         }
2465 #endif
2466
2467  cleanup:
2468         /*
2469          *      Clean up.  These are no longer needed.
2470          */
2471         pairfree(&request->config_items);
2472
2473         pairfree(&request->packet->vps);
2474         request->username = NULL;
2475         request->password = NULL;
2476
2477         pairfree(&request->reply->vps);
2478
2479 #ifdef WITH_PROXY
2480         if (request->proxy) {
2481                 pairfree(&request->proxy->vps);
2482
2483                 if (request->proxy_reply) {
2484                         pairfree(&request->proxy_reply->vps);
2485                 }
2486
2487 #if 0
2488                 /*
2489                  *      We're not tracking responses from the home
2490                  *      server, we can therefore free this memory in
2491                  *      the child thread.
2492                  */
2493                 if (!request->in_proxy_hash) {
2494                         rad_free(&request->proxy);
2495                         rad_free(&request->proxy_reply);
2496                         request->home_server = NULL;
2497                 }
2498 #endif
2499         }
2500 #endif
2501
2502         RDEBUG2("Finished request %d.", request->number);
2503         rad_assert(child_state >= 0);
2504         request->child_state = child_state;
2505
2506         /*
2507          *      Single threaded mode: update timers now.
2508          */
2509         if (!have_children) wait_a_bit(request);
2510 }
2511
2512
2513 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2514 {
2515 #ifdef WITH_PROXY
2516         char buffer[128];
2517 #endif
2518
2519         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2520         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2521
2522         switch (request->child_state) {
2523         case REQUEST_QUEUED:
2524         case REQUEST_RUNNING:
2525 #ifdef WITH_PROXY
2526         discard:
2527 #endif
2528                 radlog(L_ERR, "Discarding duplicate request from "
2529                        "client %s port %d - ID: %d due to unfinished request %d",
2530                        client->shortname,
2531                        request->packet->src_port,request->packet->id,
2532                        request->number);
2533                 break;
2534
2535 #ifdef WITH_PROXY
2536         case REQUEST_PROXIED:
2537                 /*
2538                  *      We're not supposed to have duplicate
2539                  *      accounting packets.  The other states handle
2540                  *      duplicates fine (discard, or send duplicate
2541                  *      reply).  But we do NOT want to retransmit an
2542                  *      accounting request here, because that would
2543                  *      involve updating the Acct-Delay-Time, and
2544                  *      therefore changing the packet Id, etc.
2545                  *
2546                  *      Instead, we just discard the packet.  We may
2547                  *      eventually respond, or the client will send a
2548                  *      new accounting packet.
2549                  *
2550                  *      The same comments go for Status-Server, and
2551                  *      other packet types.
2552                  *
2553                  *      FIXME: coa: when we proxy CoA && Disconnect
2554                  *      packets, this logic has to be fixed.
2555                  */
2556                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2557                         goto discard;
2558                 }
2559
2560                 check_for_zombie_home_server(request);
2561
2562                 /*
2563                  *      If we've just discovered that the home server is
2564                  *      dead, send the packet to another one.
2565                  */
2566                 if ((request->packet->dst_port != 0) &&
2567                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2568                         home_server *home;
2569
2570                         remove_from_proxy_hash(request);
2571
2572                         home = home_server_ldb(NULL, request->home_pool, request);
2573                         if (!home) {
2574                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2575                         no_home_servers:
2576                                 /*
2577                                  *      Do post-request processing,
2578                                  *      and any insertion of necessary
2579                                  *      events.
2580                                  */
2581                                 post_proxy_fail_handler(request);
2582                                 return;
2583                         }
2584
2585                         request->proxy->code = request->packet->code;
2586
2587                         /*
2588                          *      Free the old packet, to force re-encoding
2589                          */
2590                         free(request->proxy->data);
2591                         request->proxy->data = NULL;
2592                         request->proxy->data_len = 0;
2593
2594                         /*
2595                          *      This request failed over to a virtual
2596                          *      server.  Push it back onto the queue
2597                          *      to be processed.
2598                          */
2599                         if (request->home_server->server) {
2600                                 proxy_fallback_handler(request);
2601                                 return;
2602                         }
2603
2604                         /*
2605                          *      Try to proxy the request.
2606                          */
2607                         if (!proxy_request(request)) {
2608                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2609                                 goto no_home_servers;
2610                         }
2611
2612                         /*
2613                          *      This code executes in the main server
2614                          *      thread, so there's no need for locking.
2615                          */
2616                         rad_assert(request->next_callback != NULL);
2617                         INSERT_EVENT(request->next_callback, request);
2618                         request->next_callback = NULL;
2619                         return;
2620                 } /* else the home server is still alive */
2621
2622                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2623                        inet_ntop(request->proxy->dst_ipaddr.af,
2624                                  &request->proxy->dst_ipaddr.ipaddr,
2625                                  buffer, sizeof(buffer)),
2626                        request->proxy->dst_port,
2627                        request->proxy->id);
2628                 request->num_proxied_requests++;
2629
2630                 DEBUG_PACKET(request, request->proxy, 1);
2631                 request->proxy_listener->send(request->proxy_listener,
2632                                               request);
2633                 break;
2634 #endif
2635
2636         case REQUEST_REJECT_DELAY:
2637                 RDEBUG2("Waiting to send Access-Reject "
2638                        "to client %s port %d - ID: %d",
2639                        client->shortname,
2640                        request->packet->src_port, request->packet->id);
2641                 break;
2642
2643         case REQUEST_CLEANUP_DELAY:
2644         case REQUEST_DONE:
2645                 if (request->reply->code == 0) {
2646                         RDEBUG2("Ignoring retransmit from client %s port %d "
2647                                 "- ID: %d, no reply was configured",
2648                                 client->shortname,
2649                                 request->packet->src_port, request->packet->id);
2650                         return;
2651                 }
2652
2653                 /*
2654                  *      FIXME: This sends duplicate replies to
2655                  *      accounting requests, even if Acct-Delay-Time
2656                  *      or Event-Timestamp is in the packet.  In those
2657                  *      cases, the Id should be changed, and the packet
2658                  *      re-calculated.
2659                  */
2660                 RDEBUG2("Sending duplicate reply "
2661                        "to client %s port %d - ID: %d",
2662                        client->shortname,
2663                        request->packet->src_port, request->packet->id);
2664                 DEBUG_PACKET(request, request->reply, 1);
2665                 request->listener->send(request->listener, request);
2666                 break;
2667         }
2668 }
2669
2670
2671 static void received_conflicting_request(REQUEST *request,
2672                                          const RADCLIENT *client)
2673 {
2674         radlog(L_ERR, "Received conflicting packet from "
2675                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2676                client->shortname,
2677                request->packet->src_port, request->packet->id,
2678                request->number);
2679
2680         /*
2681          *      Nuke it from the request hash, so we can receive new
2682          *      packets.
2683          */
2684         remove_from_request_hash(request);
2685
2686         switch (request->child_state) {
2687 #ifdef HAVE_PTHREAD_H
2688                 /*
2689                  *      It's queued or running.  Tell it to stop, and
2690                  *      wait for it to do so.
2691                  */
2692         case REQUEST_QUEUED:
2693         case REQUEST_RUNNING:
2694                 request->master_state = REQUEST_STOP_PROCESSING;
2695                 request->delay += request->delay >> 1;
2696
2697                 tv_add(&request->when, request->delay);
2698
2699                 INSERT_EVENT(wait_for_child_to_die, request);
2700                 return;
2701 #endif
2702
2703                 /*
2704                  *      It's in some other state, and therefore also
2705                  *      in the event queue.  At some point, the
2706                  *      child will notice, and we can then delete it.
2707                  */
2708         default:
2709                 rad_assert(request->ev != NULL);
2710                 break;
2711         }
2712 }
2713
2714
2715 static int can_handle_new_request(RADIUS_PACKET *packet,
2716                                   RADCLIENT *client,
2717                                   struct main_config_t *root)
2718 {
2719         /*
2720          *      Count the total number of requests, to see if
2721          *      there are too many.  If so, return with an
2722          *      error.
2723          */
2724         if (root->max_requests) {
2725                 int request_count = fr_packet_list_num_elements(pl);
2726
2727                 /*
2728                  *      This is a new request.  Let's see if
2729                  *      it makes us go over our configured
2730                  *      bounds.
2731                  */
2732                 if (request_count > root->max_requests) {
2733                         radlog(L_ERR, "Dropping request (%d is too many): "
2734                                "from client %s port %d - ID: %d", request_count,
2735                                client->shortname,
2736                                packet->src_port, packet->id);
2737                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2738                                "\tThe value for 'max_requests' is probably set too low.\n");
2739                         return 0;
2740                 } /* else there were a small number of requests */
2741         } /* else there was no configured limit for requests */
2742
2743         /*
2744          *      FIXME: Add per-client checks.  If one client is sending
2745          *      too many packets, start discarding them.
2746          *
2747          *      We increment the counters here, and decrement them
2748          *      when the response is sent... somewhere in this file.
2749          */
2750
2751         /*
2752          *      FUTURE: Add checks for system load.  If the system is
2753          *      busy, start dropping requests...
2754          *
2755          *      We can probably keep some statistics ourselves...  if
2756          *      there are more requests coming in than we can handle,
2757          *      start dropping some.
2758          */
2759
2760         return 1;
2761 }
2762
2763
2764 int received_request(rad_listen_t *listener,
2765                      RADIUS_PACKET *packet, REQUEST **prequest,
2766                      RADCLIENT *client)
2767 {
2768         RADIUS_PACKET **packet_p;
2769         REQUEST *request = NULL;
2770         struct main_config_t *root = &mainconfig;
2771
2772         packet_p = fr_packet_list_find(pl, packet);
2773         if (packet_p) {
2774                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2775                 rad_assert(request->in_request_hash);
2776
2777                 if ((request->packet->data_len == packet->data_len) &&
2778                     (memcmp(request->packet->vector, packet->vector,
2779                             sizeof(packet->vector)) == 0)) {
2780                         received_retransmit(request, client);
2781                         return 0;
2782                 }
2783
2784                 /*
2785                  *      The new request is different from the old one,
2786                  *      but maybe the old is finished.  If so, delete
2787                  *      the old one.
2788                  */
2789                 switch (request->child_state) {
2790                         struct timeval when;
2791
2792                 default:
2793                         /*
2794                          *      Special hacks for race conditions.
2795                          *      The reply is encoded, and therefore
2796                          *      likely sent.  We received a *new*
2797                          *      packet from the client, likely before
2798                          *      the next line or two of code which
2799                          *      updated the child state.  In this
2800                          *      case, just accept the new request.
2801                          */
2802                         if ((request->reply->code != 0) &&
2803                             request->reply->data) {
2804                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2805                                        client->shortname,
2806                                        packet->src_port, packet->id,
2807                                        request->number);
2808                                 remove_from_request_hash(request);
2809                                 request = NULL;
2810                                 break;
2811                         }
2812
2813                         gettimeofday(&when, NULL);
2814                         when.tv_sec -= 1;
2815
2816                         /*
2817                          *      If the cached request was received
2818                          *      within the last second, then we
2819                          *      discard the NEW request instead of the
2820                          *      old one.  This will happen ONLY when
2821                          *      the client is severely broken, and is
2822                          *      sending conflicting packets very
2823                          *      quickly.
2824                          */
2825                         if (timercmp(&when, &request->received, <)) {
2826                                 radlog(L_ERR, "Discarding conflicting packet from "
2827                                        "client %s port %d - ID: %d due to recent request %d.",
2828                                        client->shortname,
2829                                        packet->src_port, packet->id,
2830                                        request->number);
2831                                 return 0;
2832                         }
2833
2834                         received_conflicting_request(request, client);
2835                         request = NULL;
2836                         break;
2837
2838                 case REQUEST_REJECT_DELAY:
2839                 case REQUEST_CLEANUP_DELAY:
2840                         request->child_state = REQUEST_DONE;
2841                 case REQUEST_DONE:
2842                         cleanup_delay(request);
2843                         request = NULL;
2844                         break;
2845                 }
2846         }
2847
2848         /*
2849          *      We may want to quench the new request.
2850          */
2851         if ((listener->type != RAD_LISTEN_DETAIL) &&
2852             !can_handle_new_request(packet, client, root)) {
2853                 return 0;
2854         }
2855
2856         /*
2857          *      Create and initialize the new request.
2858          */
2859         request = request_alloc(); /* never fails */
2860
2861         if ((request->reply = rad_alloc(0)) == NULL) {
2862                 radlog(L_ERR, "No memory");
2863                 exit(1);
2864         }
2865
2866         request->listener = listener;
2867         request->client = client;
2868         request->packet = packet;
2869         request->packet->timestamp = request->timestamp;
2870         request->number = request_num_counter++;
2871         request->priority = listener->type;
2872 #ifdef HAVE_PTHREAD_H
2873         request->child_pid = NO_SUCH_CHILD_PID;
2874 #endif
2875
2876         /*
2877          *      Status-Server packets go to the head of the queue.
2878          */
2879         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2880
2881         /*
2882          *      Set virtual server identity
2883          */
2884         if (client->server) {
2885                 request->server = client->server;
2886         } else if (listener->server) {
2887                 request->server = listener->server;
2888         } else {
2889                 request->server = NULL;
2890         }
2891
2892         /*
2893          *      Remember the request in the list.
2894          */
2895         if (!fr_packet_list_insert(pl, &request->packet)) {
2896                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2897                 ev_request_free(&request);
2898                 return 0;
2899         }
2900
2901         request->in_request_hash = TRUE;
2902         request->root = root;
2903         root->refcount++;
2904
2905         /*
2906          *      The request passes many of our sanity checks.
2907          *      From here on in, if anything goes wrong, we
2908          *      send a reject message, instead of dropping the
2909          *      packet.
2910          */
2911
2912         /*
2913          *      Build the reply template from the request.
2914          */
2915
2916         request->reply->sockfd = request->packet->sockfd;
2917         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2918         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2919         request->reply->dst_port = request->packet->src_port;
2920         request->reply->src_port = request->packet->dst_port;
2921         request->reply->id = request->packet->id;
2922         request->reply->code = 0; /* UNKNOWN code */
2923         memcpy(request->reply->vector, request->packet->vector,
2924                sizeof(request->reply->vector));
2925         request->reply->vps = NULL;
2926         request->reply->data = NULL;
2927         request->reply->data_len = 0;
2928
2929         request->master_state = REQUEST_ACTIVE;
2930         request->child_state = REQUEST_QUEUED;
2931         request->next_callback = NULL;
2932
2933         gettimeofday(&request->received, NULL);
2934         request->timestamp = request->received.tv_sec;
2935         request->when = request->received;
2936
2937         request->delay = USEC;
2938
2939         tv_add(&request->when, request->delay);
2940
2941         INSERT_EVENT(wait_a_bit, request);
2942
2943         *prequest = request;
2944         return 1;
2945 }
2946
2947
2948 #ifdef WITH_PROXY
2949 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2950 {
2951         char            buffer[128];
2952         REQUEST         *request;
2953
2954         /*
2955          *      Also removes from the proxy hash if responses == requests
2956          */
2957         request = lookup_in_proxy_hash(packet);
2958
2959         if (!request) {
2960                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2961                        inet_ntop(packet->src_ipaddr.af,
2962                                  &packet->src_ipaddr.ipaddr,
2963                                  buffer, sizeof(buffer)),
2964                        packet->src_port, packet->id);
2965                 return NULL;
2966         }
2967
2968         /*
2969          *      We haven't replied to the NAS, but we have seen an
2970          *      earlier reply from the home server.  Ignore this packet,
2971          *      as we're likely still processing the previous reply.
2972          */
2973         if (request->proxy_reply) {
2974                 if (memcmp(request->proxy_reply->vector,
2975                            packet->vector,
2976                            sizeof(request->proxy_reply->vector)) == 0) {
2977                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
2978                                inet_ntop(packet->src_ipaddr.af,
2979                                          &packet->src_ipaddr.ipaddr,
2980                                          buffer, sizeof(buffer)),
2981                                packet->src_port, packet->id,
2982                                request->number);
2983                 } else {
2984                         /*
2985                          *      ? The home server gave us a new proxy
2986                          *      reply which doesn't match the old
2987                          *      one.  Delete it.
2988                          */
2989                         RDEBUG2("Ignoring conflicting proxy reply");
2990                 }
2991
2992                 /* assert that there's an event queued for request? */
2993                 return NULL;
2994         }
2995
2996         /*
2997          *      Verify the packet before doing ANYTHING with it.  This
2998          *      means we're doing more MD5 checks in the server core.
2999          *      However, we can fix that by moving to multiple threads
3000          *      listening on sockets.
3001          *
3002          *      We do this AFTER looking the request up in the hash,
3003          *      and AFTER vhecking if we saw a previous request.  This
3004          *      helps minimize the DoS effect of people attacking us
3005          *      with spoofed packets.
3006          */
3007         if (rad_verify(packet, request->proxy,
3008                        request->home_server->secret) != 0) {
3009                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3010                 return NULL;
3011         }
3012
3013         gettimeofday(&now, NULL);
3014
3015         /*
3016          *      Maybe move this earlier in the decision process?
3017          *      Having it here means that late or duplicate proxy
3018          *      replies no longer get the home server marked as
3019          *      "alive".  This might be good for stability, though.
3020          *
3021          *      FIXME: Do we really want to do this whenever we
3022          *      receive a packet?  Setting this here means that we
3023          *      mark it alive on *any* packet, even if it's lost all
3024          *      of the *other* packets in the last 10s.
3025          */
3026         request->home_server->state = HOME_STATE_ALIVE;
3027
3028 #ifdef WITH_COA
3029         /*
3030          *      When originating CoA, the "proxy" reply is the reply
3031          *      to the CoA request that we originated.  At this point,
3032          *      the original request is finished, and it has a reply.
3033          *
3034          *      However, if we haven't separated the two requests, do
3035          *      so now.  This is done so that cleaning up the original
3036          *      request won't cause the CoA request to be free'd.  See
3037          *      util.c, request_free()
3038          */
3039         if (request->parent && (request->parent->coa == request)) {
3040                 request->parent->coa = NULL;
3041                 request->parent = NULL;
3042
3043         } else
3044                 /*
3045                  *      Skip the next set of checks, as the original
3046                  *      reply is cached.  We want to be able to still
3047                  *      process the CoA reply, AND to reference the
3048                  *      original request/reply.
3049                  *
3050                  *      This is getting to be really quite a bit of a
3051                  *      hack.
3052                  */
3053 #endif
3054
3055         /*
3056          *      If there's a reply to the NAS, ignore everything
3057          *      related to proxy responses
3058          */
3059         if (request->reply && request->reply->code != 0) {
3060                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3061                 return NULL;
3062         }
3063
3064 #ifdef WITH_STATS
3065         /*
3066          *      The average includes our time to receive packets and
3067          *      look them up in the hashes, which should be the same
3068          *      for all packets.
3069          *
3070          *      We update the response time only for the FIRST packet
3071          *      we receive.
3072          */
3073         if (request->home_server->ema.window > 0) {
3074                 radius_stats_ema(&request->home_server->ema,
3075                                  &now, &request->proxy_when);
3076         }
3077 #endif
3078
3079         switch (request->child_state) {
3080         case REQUEST_QUEUED:
3081         case REQUEST_RUNNING:
3082                 radlog(L_ERR, "Internal sanity check failed for child state");
3083                 /* FALL-THROUGH */
3084
3085         case REQUEST_REJECT_DELAY:
3086         case REQUEST_CLEANUP_DELAY:
3087         case REQUEST_DONE:
3088                 radlog(L_ERR, "Reply from home server %s port %d  - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3089                        inet_ntop(packet->src_ipaddr.af,
3090                                  &packet->src_ipaddr.ipaddr,
3091                                  buffer, sizeof(buffer)),
3092                        packet->src_port, packet->id,
3093                        request->number);
3094                 /* assert that there's an event queued for request? */
3095                 return NULL;
3096
3097         case REQUEST_PROXIED:
3098                 break;
3099         }
3100
3101         request->proxy_reply = packet;
3102
3103 #if 0
3104         /*
3105          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3106          *      Note that we only do so on the first response.
3107          */
3108         if ((request->num_proxied_responses == 1)
3109                 int rtt;
3110                 home_server *home = request->home_server;
3111
3112                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3113                 rtt *= USEC;
3114                 rtt += now.tv_usec;
3115                 rtt -= request->proxy_when.tv_usec;
3116
3117                 if (!home->has_rtt) {
3118                         home->has_rtt = TRUE;
3119
3120                         home->srtt = rtt;
3121                         home->rttvar = rtt / 2;
3122
3123                 } else {
3124                         home->rttvar -= home->rttvar >> 2;
3125                         home->rttvar += (home->srtt - rtt);
3126                         home->srtt -= home->srtt >> 3;
3127                         home->srtt += rtt >> 3;
3128                 }
3129
3130                 home->rto = home->srtt;
3131                 if (home->rttvar > (USEC / 4)) {
3132                         home->rto += home->rttvar * 4;
3133                 } else {
3134                         home->rto += USEC;
3135                 }
3136         }
3137 #endif
3138
3139         /*
3140          *      There's no incoming request, so it's a proxied packet
3141          *      we originated.
3142          */
3143         if (!request->packet) {
3144                 received_response_to_ping(request);
3145                 request->proxy_reply = NULL; /* caller will free it */
3146                 ev_request_free(&request);
3147                 return NULL;
3148         }
3149
3150         request->child_state = REQUEST_QUEUED;
3151         request->when = now;
3152         request->delay = USEC;
3153         request->priority = RAD_LISTEN_PROXY;
3154         tv_add(&request->when, request->delay);
3155
3156         /*
3157          *      Wait a bit will take care of max_request_time
3158          */
3159         INSERT_EVENT(wait_a_bit, request);
3160
3161         return request;
3162 }
3163 #endif
3164
3165 void event_new_fd(rad_listen_t *this)
3166 {
3167         char buffer[1024];
3168
3169         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3170
3171         this->print(this, buffer, sizeof(buffer));
3172
3173         if (this->status == RAD_LISTEN_STATUS_INIT) {
3174                 if (just_started) {
3175                         DEBUG("Listening on %s", buffer);
3176                 } else {
3177                         DEBUG2(" ... adding new socket %s", buffer);
3178                 }
3179                 if (!fr_event_fd_insert(el, 0, this->fd,
3180                                         event_socket_handler, this)) {
3181                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3182                         exit(1);
3183                 }
3184
3185                 this->status = RAD_LISTEN_STATUS_KNOWN;
3186                 return;
3187         }
3188
3189         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3190                 DEBUG2(" ... closing socket %s", buffer);
3191
3192                 fr_event_fd_delete(el, 0, this->fd);
3193                 this->status = RAD_LISTEN_STATUS_FINISH;
3194
3195                 /*
3196                  *      Close the fd AFTER fixing up the requests and
3197                  *      listeners, so that they don't send/recv on the
3198                  *      wrong socket (if someone manages to open
3199                  *      another one).
3200                  */
3201                 close(this->fd);
3202                 this->fd = -1;
3203         }
3204 }
3205
3206 static void handle_signal_self(int flag)
3207 {
3208         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3209                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3210                         fr_event_loop_exit(el, 1);
3211                 } else {
3212                         fr_event_loop_exit(el, 2);
3213                 }
3214
3215                 return;
3216         } /* else exit/term flags weren't set */
3217
3218         /*
3219          *      Tell the even loop to stop processing.
3220          */
3221         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3222                 time_t when;
3223                 static time_t last_hup = 0;
3224
3225                 DEBUG("Received HUP signal.");
3226
3227                 when = time(NULL);
3228                 if ((int) (when - last_hup) < 5) {
3229                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3230                         return;
3231                 }
3232                 last_hup = when;
3233
3234                 fr_event_loop_exit(el, 0x80);
3235         }
3236
3237 #ifdef WITH_DETAIL
3238         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3239                 rad_listen_t *this;
3240
3241                 /*
3242                  *      FIXME: O(N) loops suck.
3243                  */
3244                 for (this = mainconfig.listen;
3245                      this != NULL;
3246                      this = this->next) {
3247                         if (this->type != RAD_LISTEN_DETAIL) continue;
3248
3249                         /*
3250                          *      This one didn't send the signal, skip
3251                          *      it.
3252                          */
3253                         if (!this->decode(this, NULL)) continue;
3254
3255                         /*
3256                          *      Go service the interrupt.
3257                          */
3258                         event_poll_detail(this);
3259                 }
3260         }
3261 #endif
3262
3263         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3264                 rad_listen_t *this;
3265
3266                 for (this = mainconfig.listen;
3267                      this != NULL;
3268                      this = this->next) {
3269                         event_new_fd(this);
3270                 }
3271         }
3272 }
3273
3274 #ifndef WITH_SELF_PIPE
3275 void radius_signal_self(int flag)
3276 {
3277         handle_signal_self(flag);
3278 }
3279 #else
3280 /*
3281  *      Inform ourselves that we received a signal.
3282  */
3283 void radius_signal_self(int flag)
3284 {
3285         ssize_t rcode;
3286         uint8_t buffer[16];
3287
3288         /*
3289          *      The read MUST be non-blocking for this to work.
3290          */
3291         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3292         if (rcode > 0) {
3293                 ssize_t i;
3294
3295                 for (i = 0; i < rcode; i++) {
3296                         buffer[0] |= buffer[i];
3297                 }
3298         } else {
3299                 buffer[0] = 0;
3300         }
3301
3302         buffer[0] |= flag;
3303
3304         write(self_pipe[1], buffer, 1);
3305 }
3306
3307
3308 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3309                                  UNUSED int fd, UNUSED void *ctx)
3310 {
3311         ssize_t i, rcode;
3312         uint8_t buffer[32];
3313
3314         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3315         if (rcode <= 0) return;
3316
3317         /*
3318          *      Merge pending signals.
3319          */
3320         for (i = 0; i < rcode; i++) {
3321                 buffer[0] |= buffer[i];
3322         }
3323
3324         handle_signal_self(buffer[0]);
3325 }
3326 #endif
3327
3328
3329 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3330                                  void *ctx)
3331 {
3332         rad_listen_t *listener = ctx;
3333         RAD_REQUEST_FUNP fun;
3334         REQUEST *request;
3335
3336         rad_assert(xel == el);
3337
3338         xel = xel;
3339
3340         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3341
3342         if (!listener->recv(listener, &fun, &request)) return;
3343
3344         if (!thread_pool_addrequest(request, fun)) {
3345                 request->child_state = REQUEST_DONE;
3346         }
3347 }
3348
3349 typedef struct listen_detail_t {
3350         fr_event_t      *ev;
3351 } listen_detail_t;
3352
3353 /*
3354  *      This function is called periodically to see if this detail
3355  *      file is available for reading.
3356  */
3357 static void event_poll_detail(void *ctx)
3358 {
3359         int rcode, delay;
3360         RAD_REQUEST_FUNP fun;
3361         REQUEST *request;
3362         rad_listen_t *this = ctx;
3363         struct timeval when;
3364         listen_detail_t *detail = this->data;
3365
3366         rad_assert(this->type == RAD_LISTEN_DETAIL);
3367
3368         /*
3369          *      Try to read something.
3370          *
3371          *      FIXME: This does poll AND receive.
3372          */
3373         rcode = this->recv(this, &fun, &request);
3374         if (rcode != 0) {
3375                 rad_assert(fun != NULL);
3376                 rad_assert(request != NULL);
3377
3378                 if (!thread_pool_addrequest(request, fun)) {
3379                         request->child_state = REQUEST_DONE;
3380                 }
3381         }
3382
3383         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3384         when = now;
3385
3386         /*
3387          *      Backdoor API to get the delay until the next poll time.
3388          */
3389         delay = this->encode(this, NULL);
3390         tv_add(&when, delay);
3391
3392         if (!fr_event_insert(el, event_poll_detail, this,
3393                              &when, &detail->ev)) {
3394                 radlog(L_ERR, "Failed creating handler");
3395                 exit(1);
3396         }
3397 }
3398
3399
3400 static void event_status(struct timeval *wake)
3401 {
3402 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3403         int argval;
3404 #endif
3405
3406         if (debug_flag == 0) {
3407                 if (just_started) {
3408                         radlog(L_INFO, "Ready to process requests.");
3409                         just_started = FALSE;
3410                 }
3411                 return;
3412         }
3413
3414         if (!wake) {
3415                 DEBUG("Ready to process requests.");
3416
3417         } else if ((wake->tv_sec != 0) ||
3418                    (wake->tv_usec >= 100000)) {
3419                 DEBUG("Waking up in %d.%01u seconds.",
3420                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3421         }
3422
3423
3424         /*
3425          *      FIXME: Put this somewhere else, where it isn't called
3426          *      all of the time...
3427          */
3428
3429 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3430         /*
3431          *      If there are no child threads, then there may
3432          *      be child processes.  In that case, wait for
3433          *      their exit status, and throw that exit status
3434          *      away.  This helps get rid of zxombie children.
3435          */
3436         while (waitpid(-1, &argval, WNOHANG) > 0) {
3437                 /* do nothing */
3438         }
3439 #endif
3440
3441 }
3442
3443 /*
3444  *      Externally-visibly functions.
3445  */
3446 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3447 {
3448         rad_listen_t *this, *head = NULL;
3449
3450         if (el) return 0;
3451
3452         time(&fr_start_time);
3453
3454         el = fr_event_list_create(event_status);
3455         if (!el) return 0;
3456
3457         pl = fr_packet_list_create(0);
3458         if (!pl) return 0;      /* leak el */
3459
3460         request_num_counter = 0;
3461
3462         /*
3463          *      Move all of the thread calls to this file?
3464          *
3465          *      It may be best for the mutexes to be in this file...
3466          */
3467         have_children = spawn_flag;
3468
3469 #ifdef WITH_PROXY
3470         if (mainconfig.proxy_requests) {
3471                 /*
3472                  *      Create the tree for managing proxied requests and
3473                  *      responses.
3474                  */
3475                 proxy_list = fr_packet_list_create(1);
3476                 if (!proxy_list) return 0;
3477
3478 #ifdef HAVE_PTHREAD_H
3479                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3480                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3481                                strerror(errno));
3482                         exit(1);
3483                 }
3484 #endif
3485         }
3486 #endif
3487
3488         /*
3489          *      Just before we spawn the child threads, force the log
3490          *      subsystem to re-open the log file for every write.
3491          */
3492         if (spawn_flag) force_log_reopen();
3493
3494 #ifdef HAVE_PTHREAD_H
3495 #ifndef __MINGW32__
3496         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3497 #else
3498         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3499 #endif
3500         if (thread_pool_init(cs, spawn_flag) < 0) {
3501                 exit(1);
3502         }
3503 #endif
3504
3505         if (check_config) {
3506                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3507                        mainconfig.name);
3508                 return 1;
3509         }
3510
3511 #ifdef WITH_SELF_PIPE
3512         /*
3513          *      Child threads need a pipe to signal us, as do the
3514          *      signal handlers.
3515          */
3516         if (pipe(self_pipe) < 0) {
3517                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3518                        strerror(errno));
3519                 exit(1);
3520         }
3521         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3522                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3523                        strerror(errno));
3524                 exit(1);
3525         }
3526         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3527                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3528                        strerror(errno));
3529                 exit(1);
3530         }
3531
3532         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3533                                   event_signal_handler, el)) {
3534                 radlog(L_ERR, "Failed creating handler for signals");
3535                 exit(1);
3536         }
3537 #endif  /* WITH_SELF_PIPE */
3538
3539 #ifdef WITH_PROXY
3540         /*
3541          *      Mark the proxy Fd's as unused.
3542          */
3543         {
3544                 int i;
3545
3546                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3547         }
3548 #endif
3549
3550        DEBUG("%s: #### Opening IP addresses and Ports ####",
3551                mainconfig.name);
3552
3553        /*
3554         *       The server temporarily switches to an unprivileged
3555         *       user very early in the bootstrapping process.
3556         *       However, some sockets MAY require privileged access
3557         *       (bind to device, or to port < 1024, or to raw
3558         *       sockets).  Those sockets need to call suid up/down
3559         *       themselves around the functions that need a privileged
3560         *       uid.
3561         */
3562         if (listen_init(cs, &head) < 0) {
3563                 _exit(1);
3564         }
3565
3566         /*
3567          *      At this point, no one has any business *ever* going
3568          *      back to root uid.
3569          */
3570         fr_suid_down_permanent();
3571
3572         /*
3573          *      Add all of the sockets to the event loop.
3574          */
3575         for (this = head;
3576              this != NULL;
3577              this = this->next) {
3578                 char buffer[256];
3579
3580                 this->print(this, buffer, sizeof(buffer));
3581
3582                 switch (this->type) {
3583 #ifdef WITH_DETAIL
3584                 case RAD_LISTEN_DETAIL:
3585                         DEBUG("Listening on %s", buffer);
3586
3587                         /*
3588                          *      Detail files are always known, and aren't
3589                          *      put into the socket event loop.
3590                          */
3591                         this->status = RAD_LISTEN_STATUS_KNOWN;
3592
3593                         /*
3594                          *      Set up the first poll interval.
3595                          */
3596                         event_poll_detail(this);
3597                         break;
3598 #endif
3599
3600 #ifdef WITH_PROXY
3601                 case RAD_LISTEN_PROXY:
3602                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3603                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3604
3605                         proxy_fds[this->fd & 0x1f] = this->fd;
3606                         proxy_listeners[this->fd & 0x1f] = this;
3607                         if (!fr_packet_list_socket_add(proxy_list,
3608                                                          this->fd)) {
3609                                 rad_assert(0 == 1);
3610                         }
3611                         /* FALL-THROUGH */
3612 #endif
3613
3614                 default:
3615                         break;
3616                 }
3617
3618                 event_new_fd(this);
3619         }
3620
3621         mainconfig.listen = head;
3622
3623         return 1;
3624 }
3625
3626
3627 static int request_hash_cb(UNUSED void *ctx, void *data)
3628 {
3629         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3630
3631 #ifdef WITH_PROXY
3632         rad_assert(request->in_proxy_hash == FALSE);
3633 #endif
3634
3635         ev_request_free(&request);
3636
3637         return 0;
3638 }
3639
3640
3641 #ifdef WITH_PROXY
3642 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3643 {
3644         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3645
3646         ev_request_free(&request);
3647
3648         return 0;
3649 }
3650 #endif
3651
3652 void radius_event_free(void)
3653 {
3654         /*
3655          *      FIXME: Stop all threads, or at least check that
3656          *      they're all waiting on the semaphore, and the queues
3657          *      are empty.
3658          */
3659
3660 #ifdef WITH_PROXY
3661         /*
3662          *      There are requests in the proxy hash that aren't
3663          *      referenced from anywhere else.  Remove them first.
3664          */
3665         if (proxy_list) {
3666                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3667                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3668                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3669                 fr_packet_list_free(proxy_list);
3670                 proxy_list = NULL;
3671         }
3672 #endif
3673
3674         fr_packet_list_walk(pl, NULL, request_hash_cb);
3675
3676         fr_packet_list_free(pl);
3677         pl = NULL;
3678
3679         fr_event_list_free(el);
3680 }
3681
3682 int radius_event_process(void)
3683 {
3684         if (!el) return 0;
3685
3686         return fr_event_loop(el);
3687 }
3688
3689 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3690 {
3691         request->options = RAD_REQUEST_OPTION_DEBUG2;
3692
3693         if (request_pre_handler(request)) {
3694                 rad_assert(fun != NULL);
3695                 rad_assert(request != NULL);
3696
3697                 if (request->server) RDEBUG("server %s {",
3698                                             request->server != NULL ?
3699                                             request->server : "");
3700                 fun(request);
3701
3702                 if (request->server) RDEBUG("} # server %s",
3703                                              request->server != NULL ?
3704                                             request->server : "");
3705
3706                 request_post_handler(request);
3707         }
3708
3709         DEBUG2("Going to the next request");
3710         return;
3711 }