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         }
 353
 354         if (retransmit) {
 355                 RADIUS_PACKET packet;
 356
 357                 packet = *request->proxy;
 358
 359                 if (!proxy_id_alloc(request, &packet)) {
 360                         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 361                         return 0;
 362                 }
 363
 364                 /*
 365                  *      Yank the request, free the old Id, and
 366                  *      remember the new Id.
 367                  */
 368                 fr_packet_list_yank(proxy_list, request->proxy);
 369                 fr_packet_list_id_free(proxy_list, request->proxy);
 370                 *request->proxy = packet;
 371
 372         } else if (!proxy_id_alloc(request, request->proxy)) {
 373                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 374                 return 0;
 375         }
 376
 377         rad_assert(request->proxy->sockfd >= 0);
 378
 379         /*
 380          *      FIXME: Hack until we get rid of rad_listen_t, and put
 381          *      the information into the packet_list.
 382          */
 383         proxy = -1;
 384         for (i = 0; i < 32; i++) {
 385                 if (proxy_fds[i] == request->proxy->sockfd) {
 386                         proxy = i;
 387                         break;
 388                 }
 389         }
 390
 391         if (proxy < 0) {
 392                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 393                 RDEBUG2("ERROR: All sockets are full.");
 394                 return 0;
 395         }
 396
 397         rad_assert(proxy_fds[proxy] != -1);
 398         rad_assert(proxy_listeners[proxy] != NULL);
 399         request->proxy_listener = proxy_listeners[proxy];
 400
 401         if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
 402                 fr_packet_list_id_free(proxy_list, request->proxy);
 403                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 404                 RDEBUG2("ERROR: Failed to insert entry into proxy list");
 405                 return 0;
 406         }
 407
 408         request->in_proxy_hash = TRUE;
 409
 410         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 411
 412         RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
 413                inet_ntop(request->proxy->dst_ipaddr.af,
 414                          &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
 415                request->proxy->dst_port,
 416                request->proxy->id);
 417
 418         return 1;
 419 }
 420
 421
 422 /*
 423  *      Called as BOTH an event, and in-line from other functions.
 424  */
 425 static void wait_for_proxy_id_to_expire(void *ctx)
 426 {
 427         REQUEST *request = ctx;
 428
 429         rad_assert(request->magic == REQUEST_MAGIC);
 430         rad_assert(request->proxy != NULL);
 431
 432         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
 433         request->when = request->proxy_when;
 434
 435 #ifdef WITH_COA
 436         if (((request->proxy->code == PW_COA_REQUEST) ||
 437              (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
 438             (request->packet->code != request->proxy->code)) {
 439                 request->when.tv_sec += request->home_server->coa_mrd;
 440         } else
 441 #endif
 442         request->when.tv_sec += request->home_server->response_window;
 443
 444         if ((request->num_proxied_requests == request->num_proxied_responses) ||
 445             timercmp(&now, &request->when, >)) {
 446                 if (request->packet) {
 447                         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 448                                request->number, request->packet->id,
 449                                (unsigned int) (request->timestamp - fr_start_time));
 450                 } else {
 451                         RDEBUG2("Cleaning up request %d with timestamp +%d",
 452                                request->number,
 453                                (unsigned int) (request->timestamp - fr_start_time));
 454                 }
 455
 456                 ev_request_free(&request);
 457                 return;
 458         }
 459
 460         INSERT_EVENT(wait_for_proxy_id_to_expire, request);
 461 }
 462 #endif
 463
 464 #ifdef HAVE_PTHREAD_H
 465 static void wait_for_child_to_die(void *ctx)
 466 {
 467         REQUEST *request = ctx;
 468
 469         rad_assert(request->magic == REQUEST_MAGIC);
 470
 471         if ((request->child_state == REQUEST_QUEUED) |
 472             (request->child_state == REQUEST_RUNNING)) {
 473                 request->delay += (request->delay >> 1);
 474                 tv_add(&request->when, request->delay);
 475
 476                 RDEBUG2("Child is still stuck for request %d", request->number);
 477
 478                 INSERT_EVENT(wait_for_child_to_die, request);
 479                 return;
 480         }
 481
 482         RDEBUG2("Child is finally responsive for request %d", request->number);
 483         remove_from_request_hash(request);
 484
 485 #ifdef WITH_PROXY
 486         if (request->proxy) {
 487                 wait_for_proxy_id_to_expire(request);
 488                 return;
 489         }
 490 #endif
 491
 492         ev_request_free(&request);
 493 }
 494 #endif
 495
 496 static void cleanup_delay(void *ctx)
 497 {
 498         REQUEST *request = ctx;
 499
 500         rad_assert(request->magic == REQUEST_MAGIC);
 501         rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
 502                    (request->child_state == REQUEST_DONE));
 503
 504         remove_from_request_hash(request);
 505
 506 #ifdef WITH_PROXY
 507         if (request->proxy && request->in_proxy_hash) {
 508                 wait_for_proxy_id_to_expire(request);
 509                 return;
 510         }
 511 #endif
 512
 513         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 514                request->number, request->packet->id,
 515                (unsigned int) (request->timestamp - fr_start_time));
 516
 517         ev_request_free(&request);
 518 }
 519
 520
 521 /*
 522  *      In daemon mode, AND this request has debug flags set.
 523  */
 524 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
 525
 526 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
 527 {
 528         VALUE_PAIR *vp;
 529         char buffer[1024];
 530         const char *received, *from;
 531         const fr_ipaddr_t *ip;
 532         int port;
 533
 534         if (!packet) return;
 535
 536         rad_assert(request->radlog != NULL);
 537
 538         if (direction == 0) {
 539                 received = "Received";
 540                 from = "from";  /* what else? */
 541                 ip = &packet->src_ipaddr;
 542                 port = packet->src_port;
 543
 544         } else {
 545                 received = "Sending";
 546                 from = "to";    /* hah! */
 547                 ip = &packet->dst_ipaddr;
 548                 port = packet->dst_port;
 549         }
 550
 551         /*
 552          *      Client-specific debugging re-prints the input
 553          *      packet into the client log.
 554          *
 555          *      This really belongs in a utility library
 556          */
 557         if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
 558                 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
 559                        received, fr_packet_codes[packet->code], from,
 560                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 561                        port, packet->id, packet->data_len);
 562         } else {
 563                 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
 564                        received, from,
 565                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 566                        port,
 567                        packet->code, packet->id, packet->data_len);
 568         }
 569
 570         for (vp = packet->vps; vp != NULL; vp = vp->next) {
 571                 vp_prints(buffer, sizeof(buffer), vp);
 572                 request->radlog(L_DBG, 0, request, "\t%s", buffer);
 573         }
 574 }
 575
 576 static void reject_delay(void *ctx)
 577 {
 578         REQUEST *request = ctx;
 579
 580         rad_assert(request->magic == REQUEST_MAGIC);
 581         rad_assert(request->child_state == REQUEST_REJECT_DELAY);
 582
 583         RDEBUG2("Sending delayed reject for request %d", request->number);
 584
 585         DEBUG_PACKET(request, request->reply, 1);
 586
 587         request->listener->send(request->listener, request);
 588
 589         request->when.tv_sec += request->root->cleanup_delay;
 590         request->child_state = REQUEST_CLEANUP_DELAY;
 591
 592         INSERT_EVENT(cleanup_delay, request);
 593 }
 594
 595
 596 #ifdef WITH_PROXY
 597 void revive_home_server(void *ctx)
 598 {
 599         home_server *home = ctx;
 600         char buffer[128];
 601
 602         home->state = HOME_STATE_ALIVE;
 603         home->currently_outstanding = 0;
 604         home->revive_time = now;
 605
 606         /*
 607          *      Delete any outstanding events.
 608          */
 609         if (home->ev) fr_event_delete(el, &home->ev);
 610
 611         radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
 612                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 613                          buffer, sizeof(buffer)),
 614                home->port);
 615
 616 }
 617
 618
 619 static void no_response_to_ping(void *ctx)
 620 {
 621         REQUEST *request = ctx;
 622         home_server *home;
 623         char buffer[128];
 624
 625         rad_assert(request->home_server != NULL);
 626
 627         home = request->home_server;
 628         home->num_received_pings = 0;
 629
 630         RDEBUG2("No response to status check %d from home server %s port %d",
 631                request->number,
 632                inet_ntop(request->proxy->dst_ipaddr.af,
 633                          &request->proxy->dst_ipaddr.ipaddr,
 634                          buffer, sizeof(buffer)),
 635                request->proxy->dst_port);
 636
 637         wait_for_proxy_id_to_expire(request);
 638 }
 639
 640
 641 static void received_response_to_ping(REQUEST *request)
 642 {
 643         home_server *home;
 644         char buffer[128];
 645
 646         rad_assert(request->home_server != NULL);
 647
 648         home = request->home_server;
 649         home->num_received_pings++;
 650
 651         RDEBUG2("Received response to status check %d (%d in current sequence)",
 652                request->number, home->num_received_pings);
 653
 654         /*
 655          *      Remove the request from any hashes
 656          */
 657         fr_event_delete(el, &request->ev);
 658         remove_from_proxy_hash(request);
 659         rad_assert(request->in_request_hash == FALSE);
 660
 661         /*
 662          *      The control socket may have marked the home server as
 663          *      alive.  OR, it may have suddenly started responding to
 664          *      requests again.  If so, don't re-do the "make alive"
 665          *      work.
 666          */
 667         if (home->state == HOME_STATE_ALIVE) return;
 668
 669         /*
 670          *      We haven't received enough ping responses to mark it
 671          *      "alive".  Wait a bit.
 672          */
 673         if (home->num_received_pings < home->num_pings_to_alive) {
 674                 return;
 675         }
 676
 677         home->state = HOME_STATE_ALIVE;
 678         home->currently_outstanding = 0;
 679         home->revive_time = now;
 680
 681         if (!fr_event_delete(el, &home->ev)) {
 682                 RDEBUG2("Hmm... no event for home server.  Oh well.");
 683         }
 684
 685         radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
 686                inet_ntop(request->proxy->dst_ipaddr.af,
 687                          &request->proxy->dst_ipaddr.ipaddr,
 688                          buffer, sizeof(buffer)),
 689                request->proxy->dst_port);
 690 }
 691
 692
 693 /*
 694  *      Called from start of zombie period, OR after control socket
 695  *      marks the home server dead.
 696  */
 697 static void ping_home_server(void *ctx)
 698 {
 699         uint32_t jitter;
 700         home_server *home = ctx;
 701         REQUEST *request;
 702         VALUE_PAIR *vp;
 703
 704         if ((home->state == HOME_STATE_ALIVE) ||
 705             (home->ping_check == HOME_PING_CHECK_NONE) ||
 706             (home->ev != NULL)) {
 707                 return;
 708         }
 709
 710         request = request_alloc();
 711         request->number = request_num_counter++;
 712
 713         request->proxy = rad_alloc(1);
 714         rad_assert(request->proxy != NULL);
 715
 716         fr_event_now(el, &request->when);
 717         home->when = request->when;
 718
 719         if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
 720                 request->proxy->code = PW_STATUS_SERVER;
 721
 722                 radius_pairmake(request, &request->proxy->vps,
 723                                 "Message-Authenticator", "0x00", T_OP_SET);
 724
 725         } else if (home->type == HOME_TYPE_AUTH) {
 726                 request->proxy->code = PW_AUTHENTICATION_REQUEST;
 727
 728                 radius_pairmake(request, &request->proxy->vps,
 729                                 "User-Name", home->ping_user_name, T_OP_SET);
 730                 radius_pairmake(request, &request->proxy->vps,
 731                                 "User-Password", home->ping_user_password, T_OP_SET);
 732                 radius_pairmake(request, &request->proxy->vps,
 733                                 "Service-Type", "Authenticate-Only", T_OP_SET);
 734                 radius_pairmake(request, &request->proxy->vps,
 735                                 "Message-Authenticator", "0x00", T_OP_SET);
 736
 737         } else {
 738 #ifdef WITH_ACCOUNTING
 739                 request->proxy->code = PW_ACCOUNTING_REQUEST;
 740
 741                 radius_pairmake(request, &request->proxy->vps,
 742                                 "User-Name", home->ping_user_name, T_OP_SET);
 743                 radius_pairmake(request, &request->proxy->vps,
 744                                 "Acct-Status-Type", "Stop", T_OP_SET);
 745                 radius_pairmake(request, &request->proxy->vps,
 746                                 "Acct-Session-Id", "00000000", T_OP_SET);
 747                 vp = radius_pairmake(request, &request->proxy->vps,
 748                                      "Event-Timestamp", "0", T_OP_SET);
 749                 vp->vp_date = now.tv_sec;
 750 #else
 751                 rad_assert("Internal sanity check failed");
 752 #endif
 753         }
 754
 755         radius_pairmake(request, &request->proxy->vps,
 756                         "NAS-Identifier", "Status Check. Are you alive?",
 757                         T_OP_SET);
 758
 759         request->proxy->dst_ipaddr = home->ipaddr;
 760         request->proxy->dst_port = home->port;
 761         request->home_server = home;
 762
 763         rad_assert(request->proxy_listener == NULL);
 764
 765         if (!insert_into_proxy_hash(request, FALSE)) {
 766                 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash.  Discarding it.",
 767                        request->number);
 768                 ev_request_free(&request);
 769                 return;
 770         }
 771         rad_assert(request->proxy_listener != NULL);
 772         request->proxy_listener->send(request->proxy_listener,
 773                                       request);
 774
 775         request->next_callback = NULL;
 776         request->child_state = REQUEST_PROXIED;
 777         request->when.tv_sec += home->ping_timeout;;
 778
 779         INSERT_EVENT(no_response_to_ping, request);
 780
 781         /*
 782          *      Add +/- 2s of jitter, as suggested in RFC 3539
 783          *      and in the Issues and Fixes draft.
 784          */
 785         home->when.tv_sec += home->ping_interval - 2;
 786
 787         jitter = fr_rand();
 788         jitter ^= (jitter >> 10);
 789         jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
 790
 791         tv_add(&home->when, jitter);
 792
 793         INSERT_EVENT(ping_home_server, home);
 794 }
 795
 796
 797 void mark_home_server_dead(home_server *home, struct timeval *when)
 798 {
 799         int previous_state = home->state;
 800         char buffer[128];
 801
 802         radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
 803                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 804                          buffer, sizeof(buffer)),
 805                home->port);
 806
 807         home->state = HOME_STATE_IS_DEAD;
 808         home->num_received_pings = 0;
 809
 810         if (home->ping_check != HOME_PING_CHECK_NONE) {
 811                 /*
 812                  *      If the control socket marks us dead, start
 813                  *      pinging.  Otherwise, we already started
 814                  *      pinging when it was marked "zombie".
 815                  */
 816                 if (previous_state == HOME_STATE_ALIVE) {
 817                         ping_home_server(home);
 818                 }
 819
 820         } else {
 821                 /*
 822                  *      Revive it after a fixed period of time.  This
 823                  *      is very, very, bad.
 824                  */
 825                 home->when = *when;
 826                 home->when.tv_sec += home->revive_interval;
 827
 828                 INSERT_EVENT(revive_home_server, home);
 829         }
 830 }
 831
 832 static void check_for_zombie_home_server(REQUEST *request)
 833 {
 834         home_server *home;
 835         struct timeval when;
 836
 837         home = request->home_server;
 838
 839         if (home->state != HOME_STATE_ZOMBIE) return;
 840
 841         when = home->zombie_period_start;
 842         when.tv_sec += home->zombie_period;
 843
 844         fr_event_now(el, &now);
 845         if (timercmp(&now, &when, <)) {
 846                 return;
 847         }
 848
 849         mark_home_server_dead(home, &request->when);
 850 }
 851
 852 static int proxy_to_virtual_server(REQUEST *request);
 853
 854 static int virtual_server_handler(UNUSED REQUEST *request)
 855 {
 856         proxy_to_virtual_server(request);
 857         return 0;
 858 }
 859
 860 static void proxy_fallback_handler(REQUEST *request)
 861 {
 862         /*
 863          *      A proper time is required for wait_a_bit.
 864          */
 865         request->delay = USEC / 10;
 866         gettimeofday(&now, NULL);
 867         request->next_when = now;
 868         tv_add(&request->next_when, request->delay);
 869         request->next_callback = wait_a_bit;
 870
 871         /*
 872          *      Re-queue the request.
 873          */
 874         request->child_state = REQUEST_QUEUED;
 875
 876         rad_assert(request->proxy != NULL);
 877         if (!thread_pool_addrequest(request, virtual_server_handler)) {
 878                 request->child_state = REQUEST_DONE;
 879         }
 880
 881 #ifdef HAVE_PTHREAD_H
 882         /*
 883          *      MAY free the request if we're over max_request_time,
 884          *      AND we're not in threaded mode!
 885          *
 886          *      Note that we call this ONLY if we're threaded, as
 887          *      if we're NOT threaded, request_post_handler() calls
 888          *      wait_a_bit(), which means that "request" may not
 889          *      exist any more...
 890          */
 891         if (have_children) wait_a_bit(request);
 892 #endif
 893 }
 894
 895
 896 static int setup_post_proxy_fail(REQUEST *request)
 897 {
 898         DICT_VALUE *dval = NULL;
 899         VALUE_PAIR *vp;
 900
 901         request->child_state = REQUEST_RUNNING;
 902
 903         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 904                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 905
 906         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 907                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 908
 909 #ifdef WITH_COA
 910                 /*
 911                  *      See no_response_to_coa_request
 912                  */
 913         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 914                 request->packet->code &= 0xff; /* restore it */
 915
 916                 if (request->proxy->code == PW_COA_REQUEST) {
 917                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 918
 919                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 920                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 921                 } else {
 922                         return 0;
 923                 }
 924
 925 #endif
 926         } else {
 927                 return 0;
 928         }
 929
 930         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 931
 932         if (!dval) {
 933                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 934                 return 0;
 935         }
 936
 937         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 938         if (!vp) vp = radius_paircreate(request, &request->config_items,
 939                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
 940         vp->vp_integer = dval->value;
 941
 942         rad_assert(request->proxy_reply == NULL);
 943
 944         return 1;
 945 }
 946
 947
 948 static int null_handler(UNUSED REQUEST *request)
 949 {
 950         return 0;
 951 }
 952
 953 static void post_proxy_fail_handler(REQUEST *request)
 954 {
 955         /*
 956          *      A proper time is required for wait_a_bit.
 957          */
 958         request->delay = USEC / 10;
 959         gettimeofday(&now, NULL);
 960
 961         /*
 962          *      Not set up to run Post-Proxy-Type = Fail.
 963          *
 964          *      Mark the request as still running, and figure out what
 965          *      to do next.
 966          */
 967         if (!setup_post_proxy_fail(request)) {
 968                 request_post_handler(request);
 969
 970         } else {
 971                 /*
 972                  *      Re-queue the request.
 973                  */
 974                 request->child_state = REQUEST_QUEUED;
 975
 976                 /*
 977                  *      There is a post-proxy-type of fail.  We run
 978                  *      the request through the pre/post proxy
 979                  *      handlers, just like it was a real proxied
 980                  *      request.  However, we set the per-request
 981                  *      handler to NULL, as we don't want to do
 982                  *      anything else.
 983                  *
 984                  *      Note that when we're not threaded, this will
 985                  *      process the request even if it's greater than
 986                  *      max_request_time.  That's not fatal.
 987                  */
 988                 request->priority = 0;
 989                 rad_assert(request->proxy != NULL);
 990                 thread_pool_addrequest(request, null_handler);
 991         }
 992
 993         /*
 994          *      MAY free the request if we're over max_request_time,
 995          *      AND we're not in threaded mode!
 996          *
 997          *      Note that we call this ONLY if we're threaded, as
 998          *      if we're NOT threaded, request_post_handler() calls
 999          *      wait_a_bit(), which means that "request" may not
1000          *      exist any more...
1001          */
1002         if (have_children) wait_a_bit(request);
1003 }
1004
1005
1006 /* maybe check this against wait_for_proxy_id_to_expire? */
1007 static void no_response_to_proxied_request(void *ctx)
1008 {
1009         REQUEST *request = ctx;
1010         home_server *home;
1011         char buffer[128];
1012
1013         rad_assert(request->magic == REQUEST_MAGIC);
1014         rad_assert(request->child_state == REQUEST_PROXIED);
1015
1016         /*
1017          *      If we've failed over to an internal home server,
1018          *      replace the callback with the correct one.  This
1019          *      is due to locking issues with child threads...
1020          */
1021         if (request->home_server->server) {
1022                 wait_a_bit(request);
1023                 return;
1024         }
1025
1026         check_for_zombie_home_server(request);
1027
1028         home = request->home_server;
1029
1030         /*
1031          *      The default as of 2.1.7 is to allow requests to
1032          *      fail-over to a backup home server when this one does
1033          *      not respond.  The old behavior can be configured as
1034          *      well.
1035          */
1036         if (home->no_response_fail) {
1037                 radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1038                        request->number,
1039                        inet_ntop(request->proxy->dst_ipaddr.af,
1040                                  &request->proxy->dst_ipaddr.ipaddr,
1041                                  buffer, sizeof(buffer)),
1042                        request->proxy->dst_port);
1043
1044                 post_proxy_fail_handler(request);
1045         }
1046
1047         /*
1048          *      Don't touch request due to race conditions
1049          */
1050         if (home->state == HOME_STATE_IS_DEAD) {
1051                 rad_assert(home->ev != NULL); /* or it will never wake up */
1052                 return;
1053         }
1054
1055         /*
1056          *      Enable the zombie period when we notice that the home
1057          *      server hasn't responded.  We do NOT back-date the start
1058          *      of the zombie period.
1059          */
1060         if (home->state == HOME_STATE_ALIVE) {
1061                 home->state = HOME_STATE_ZOMBIE;
1062                 home->zombie_period_start = now;
1063
1064                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1065                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1066                                  buffer, sizeof(buffer)),
1067                        home->port);
1068
1069                 /*
1070                  *      Start pinging the home server.
1071                  */
1072                 ping_home_server(home);
1073         }
1074 }
1075 #endif
1076
1077 static void wait_a_bit(void *ctx)
1078 {
1079         struct timeval when;
1080         REQUEST *request = ctx;
1081         fr_event_callback_t callback = NULL;
1082
1083         rad_assert(request->magic == REQUEST_MAGIC);
1084
1085 #ifdef WITH_COA
1086         /*
1087          *      The CoA request is a new (internally generated)
1088          *      request, created in a child thread.  We therefore need
1089          *      some way to tie its events back into the main event
1090          *      handler.
1091          */
1092         if (request->coa && !request->coa->proxy_reply &&
1093             request->coa->next_callback) {
1094                 request->coa->when = request->coa->next_when;
1095                 INSERT_EVENT(request->coa->next_callback, request->coa);
1096                 request->coa->next_callback = NULL;
1097                 request->coa->parent = NULL;
1098                 request->coa = NULL;
1099         }
1100 #endif
1101
1102         switch (request->child_state) {
1103         case REQUEST_QUEUED:
1104         case REQUEST_RUNNING:
1105                 when = request->received;
1106                 when.tv_sec += request->root->max_request_time;
1107
1108                 /*
1109                  *      Normally called from the event loop with the
1110                  *      proper event loop time.  Otherwise, called from
1111                  *      post proxy fail handler, which sets "now", and
1112                  *      this call won't re-set it, because we're not
1113                  *      in the event loop.
1114                  */
1115                 fr_event_now(el, &now);
1116
1117                 /*
1118                  *      Request still has more time.  Continue
1119                  *      waiting.
1120                  */
1121                 if (timercmp(&now, &when, <) ||
1122                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1123                      (request->child_state == REQUEST_QUEUED))) {
1124                         if (request->delay < (USEC / 10)) {
1125                                 request->delay = USEC / 10;
1126                         }
1127                         request->delay += request->delay >> 1;
1128
1129 #ifdef WITH_DETAIL
1130                         /*
1131                          *      Cap wait at some sane value for detail
1132                          *      files.
1133                          */
1134                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1135                             (request->delay > (request->root->max_request_time * USEC))) {
1136                                 request->delay = request->root->max_request_time * USEC;
1137                         }
1138 #endif
1139
1140                         request->when = now;
1141                         tv_add(&request->when, request->delay);
1142                         callback = wait_a_bit;
1143                         break;
1144                 }
1145
1146 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1147                 /*
1148                  *      A child thread MAY still be running on the
1149                  *      request.  Ask the thread to stop working on
1150                  *      the request.
1151                  */
1152                 if (have_children) {
1153                         /* FIXME: kill unresponsive children? */
1154
1155                         /*
1156                          *      Print this error message ONLY if
1157                          *      there's a child currently processing
1158                          *      the request.  As we don't have thread
1159                          *      locks here, there may be race
1160                          *      conditions on this check.  But it's
1161                          *      just an error message, so that's OK.
1162                          */
1163                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1164                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1165                                        request->number,
1166                                        request->module ? request->module : "<server core>",
1167                                        request->component ? request->component : "<server core>");
1168                         }
1169
1170                         request->master_state = REQUEST_STOP_PROCESSING;
1171
1172                         request->delay = USEC / 4;
1173                         tv_add(&request->when, request->delay);
1174                         callback = wait_for_child_to_die;
1175                         break;
1176                 }
1177 #endif
1178
1179                 /*
1180                  *      Else there are no child threads.  We probably
1181                  *      should have just marked the request as 'done'
1182                  *      elsewhere, like in the post-proxy-fail
1183                  *      handler.  But doing that would involve
1184                  *      checking for max_request_time in multiple
1185                  *      places, so this may be simplest.
1186                  */
1187                 request->child_state = REQUEST_DONE;
1188                 /* FALL-THROUGH */
1189
1190                 /*
1191                  *      Mark the request as no longer running,
1192                  *      and clean it up.
1193                  */
1194         case REQUEST_DONE:
1195 #ifdef HAVE_PTHREAD_H
1196                 request->child_pid = NO_SUCH_CHILD_PID;
1197 #endif
1198
1199 #ifdef WTH_COA
1200                 /*
1201                  *      This is a CoA request.  It's been divorced
1202                  *      from everything else, so we clean it up now.
1203                  */
1204                 if (!request->in_request_hash &&
1205                     request->proxy &&
1206                     (request->packet->code != request->proxy->code) &&
1207                     ((request->proxy->code == PW_COA_REQUEST) ||
1208                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1209                         /*
1210                          *      FIXME: Do CoA MIBs
1211                          */
1212                         ev_request_free(&request);
1213                         return;
1214                 }
1215 #endif
1216                 request_stats_final(request);
1217                 cleanup_delay(request);
1218                 return;
1219
1220         case REQUEST_REJECT_DELAY:
1221         case REQUEST_CLEANUP_DELAY:
1222 #ifdef HAVE_PTHREAD_H
1223                 request->child_pid = NO_SUCH_CHILD_PID;
1224 #endif
1225                 request_stats_final(request);
1226
1227         case REQUEST_PROXIED:
1228                 rad_assert(request->next_callback != NULL);
1229                 rad_assert(request->next_callback != wait_a_bit);
1230
1231                 request->when = request->next_when;
1232                 callback = request->next_callback;
1233                 request->next_callback = NULL;
1234                 break;
1235
1236         default:
1237                 rad_panic("Internal sanity check failure");
1238                 return;
1239         }
1240
1241         /*
1242          *      Something major went wrong.  Discard the request, and
1243          *      keep running.
1244          *
1245          *      FIXME: No idea why this happens or how to fix it...
1246          *      It seems to happen *only* when requests are proxied,
1247          *      and where the home server doesn't respond.  So it looks
1248          *      like a race condition above, but it happens in debug
1249          *      mode, with no threads...
1250          */
1251         if (!callback) {
1252                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1253                 ev_request_free(&request);
1254                 return;
1255         }
1256
1257         INSERT_EVENT(callback, request);
1258 }
1259
1260 #ifdef WITH_COA
1261 static void no_response_to_coa_request(void *ctx)
1262 {
1263         REQUEST *request = ctx;
1264         char buffer[128];
1265
1266         rad_assert(request->magic == REQUEST_MAGIC);
1267         rad_assert(request->child_state == REQUEST_PROXIED);
1268         rad_assert(request->home_server != NULL);
1269         rad_assert(!request->in_request_hash);
1270
1271         radlog(L_ERR, "No response to CoA request sent to %s",
1272                inet_ntop(request->proxy->dst_ipaddr.af,
1273                          &request->proxy->dst_ipaddr.ipaddr,
1274                          buffer, sizeof(buffer)));
1275
1276         /*
1277          *      Hack.
1278          */
1279         request->packet->code |= (PW_COA_REQUEST << 8);
1280         post_proxy_fail_handler(request);
1281 }
1282
1283
1284 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1285 {
1286         VALUE_PAIR *vp;
1287
1288         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1289         if (!vp) return 0;
1290
1291         vp->vp_date = when;
1292
1293         if (packet->data) {
1294                 free(packet->data);
1295                 packet->data = NULL;
1296                 packet->data_len = 0;
1297         }
1298
1299         return 1;               /* time stamp updated */
1300 }
1301
1302
1303 /*
1304  *      Called when we haven't received a response to a CoA request.
1305  */
1306 static void retransmit_coa_request(void *ctx)
1307 {
1308         int delay, frac;
1309         struct timeval mrd;
1310         REQUEST *request = ctx;
1311
1312         rad_assert(request->magic == REQUEST_MAGIC);
1313         rad_assert(request->child_state == REQUEST_PROXIED);
1314         rad_assert(request->home_server != NULL);
1315         rad_assert(!request->in_request_hash);
1316         rad_assert(request->parent == NULL);
1317
1318         fr_event_now(el, &now);
1319
1320         /*
1321          *      Cap count at MRC, if it is non-zero.
1322          */
1323         if (request->home_server->coa_mrc &&
1324             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1325                 no_response_to_coa_request(request);
1326                 return;
1327         }
1328
1329         /*
1330          *      RFC 5080 Section 2.2.1
1331          *
1332          *      RT = 2*RTprev + RAND*RTprev
1333          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1334          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1335          */
1336         delay = fr_rand();
1337         delay ^= (delay >> 16);
1338         delay &= 0xffff;
1339         frac = request->delay / 5;
1340         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1341
1342         delay += (2 * request->delay) - (request->delay / 10);
1343
1344         /*
1345          *      Cap delay at MRT, if MRT is non-zero.
1346          */
1347         if (request->home_server->coa_mrt &&
1348             (delay > (request->home_server->coa_mrt * USEC))) {
1349                 int mrt_usec = request->home_server->coa_mrt * USEC;
1350
1351                 /*
1352                  *      delay = MRT + RAND * MRT
1353                  *            = 0.9 MRT + rand(0,.2)  * MRT
1354                  */
1355                 delay = fr_rand();
1356                 delay ^= (delay >> 15);
1357                 delay &= 0x1ffff;
1358                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1359                 delay += mrt_usec - (mrt_usec / 10);
1360         }
1361
1362         request->delay = delay;
1363         request->when = now;
1364         tv_add(&request->when, request->delay);
1365         mrd = request->proxy_when;
1366         mrd.tv_sec += request->home_server->coa_mrd;
1367
1368         /*
1369          *      Cap duration at MRD.
1370          */
1371         if (timercmp(&mrd, &request->when, <)) {
1372                 request->when = mrd;
1373                 INSERT_EVENT(no_response_to_coa_request, request);
1374
1375         } else {
1376                 INSERT_EVENT(retransmit_coa_request, request);
1377         }
1378
1379         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1380                 if (!insert_into_proxy_hash(request, TRUE)) {
1381                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1382                         return;
1383                 }
1384
1385                 request->num_proxied_requests = 0;
1386                 request->num_proxied_responses = 0;
1387         }
1388
1389         request->num_proxied_requests++;
1390         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1391
1392         request->proxy_listener->send(request->proxy_listener,
1393                                       request);
1394 }
1395
1396
1397 /*
1398  *      The original request is either DONE, or in CLEANUP_DELAY.
1399  */
1400 static int originated_coa_request(REQUEST *request)
1401 {
1402         int delay, rcode, pre_proxy_type = 0;
1403         VALUE_PAIR *vp;
1404         REQUEST *coa;
1405         fr_ipaddr_t ipaddr;
1406         char buffer[256];
1407
1408         rad_assert(request->proxy == NULL);
1409         rad_assert(!request->in_proxy_hash);
1410         rad_assert(request->proxy_reply == NULL);
1411
1412         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1413         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1414         if (vp) {
1415                 if (vp->vp_integer == 0) {
1416                         ev_request_free(&request->coa);
1417                         return 1;       /* success */
1418                 }
1419
1420                 if (!request->coa) request_alloc_coa(request);
1421                 if (!request->coa) return 0;
1422         }
1423
1424         coa = request->coa;
1425
1426         /*
1427          *      src_ipaddr will be set up in proxy_encode.
1428          */
1429         memset(&ipaddr, 0, sizeof(ipaddr));
1430         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1431         if (vp) {
1432                 ipaddr.af = AF_INET;
1433                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1434
1435         } else if ((vp = pairfind(coa->proxy->vps,
1436                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1437                 ipaddr.af = AF_INET6;
1438                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1439
1440         } else if ((vp = pairfind(coa->proxy->vps,
1441                                   PW_HOME_SERVER_POOL)) != NULL) {
1442                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1443                                                   HOME_TYPE_COA);
1444                 if (!coa->home_pool) {
1445                         RDEBUG2("WARNING: No such home_server_pool %s",
1446                                vp->vp_strvalue);
1447         fail:
1448                         ev_request_free(&request->coa);
1449                         return 0;
1450                 }
1451
1452                 /*
1453                  *      Prefer
1454                  */
1455         } else if (request->client->coa_pool) {
1456                 coa->home_pool = request->client->coa_pool;
1457
1458         } else if (request->client->coa_server) {
1459                 coa->home_server = request->client->coa_server;
1460
1461         } else {
1462                 /*
1463                  *      If all else fails, send it to the client that
1464                  *      originated this request.
1465                  */
1466                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1467         }
1468
1469         /*
1470          *      Use the pool, if it exists.
1471          */
1472         if (coa->home_pool) {
1473                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1474                 if (!coa->home_server) {
1475                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1476                         goto fail;
1477                 }
1478
1479         } else if (!coa->home_server) {
1480                 int port = PW_COA_UDP_PORT;
1481
1482                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1483                 if (vp) port = vp->vp_integer;
1484
1485                 coa->home_server = home_server_find(&ipaddr, port);
1486                 if (!coa->home_server) {
1487                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1488                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1489                                          buffer, sizeof(buffer)), port);
1490                         goto fail;
1491                 }
1492         }
1493
1494         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1495         if (vp) {
1496                 switch (vp->vp_integer) {
1497                 case PW_COA_REQUEST:
1498                 case PW_DISCONNECT_REQUEST:
1499                         coa->proxy->code = vp->vp_integer;
1500                         break;
1501
1502                 default:
1503                         DEBUG("Cannot set CoA Packet-Type to code %d",
1504                               vp->vp_integer);
1505                         goto fail;
1506                 }
1507         }
1508
1509         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1510
1511         /*
1512          *      The rest of the server code assumes that
1513          *      request->packet && request->reply exist.  Copy them
1514          *      from the original request.
1515          */
1516         rad_assert(coa->packet != NULL);
1517         rad_assert(coa->packet->vps == NULL);
1518         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1519         coa->packet->vps = paircopy(request->packet->vps);
1520         coa->packet->data = NULL;
1521         rad_assert(coa->reply != NULL);
1522         rad_assert(coa->reply->vps == NULL);
1523         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1524         coa->reply->vps = paircopy(request->reply->vps);
1525         coa->reply->data = NULL;
1526         coa->config_items = paircopy(request->config_items);
1527
1528         /*
1529          *      Call the pre-proxy routines.
1530          */
1531         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1532         if (vp) {
1533                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1534                 pre_proxy_type = vp->vp_integer;
1535         }
1536
1537         if (coa->home_pool && coa->home_pool->virtual_server) {
1538                 const char *old_server = coa->server;
1539
1540                 coa->server = coa->home_pool->virtual_server;
1541                 RDEBUG2(" server %s {", coa->server);
1542                 rcode = module_pre_proxy(pre_proxy_type, coa);
1543                 RDEBUG2(" }");
1544                 coa->server = old_server;
1545         } else {
1546                 rcode = module_pre_proxy(pre_proxy_type, coa);
1547         }
1548         switch (rcode) {
1549         default:
1550                 goto fail;
1551
1552         /*
1553          *      Only send the CoA packet if the pre-proxy code succeeded.
1554          */
1555         case RLM_MODULE_NOOP:
1556         case RLM_MODULE_OK:
1557         case RLM_MODULE_UPDATED:
1558                 break;
1559         }
1560
1561         /*
1562          *      Source IP / port is set when the proxy socket
1563          *      is chosen.
1564          */
1565         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1566         coa->proxy->dst_port = coa->home_server->port;
1567
1568         if (!insert_into_proxy_hash(coa, FALSE)) {
1569                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1570                 goto fail;
1571         }
1572
1573         /*
1574          *      We CANNOT divorce the CoA request from the parent
1575          *      request.  This function is running in a child thread,
1576          *      and we need access to the main event loop in order to
1577          *      to add the timers for the CoA packet.  See
1578          *      wait_a_bit().
1579          */
1580
1581         /*
1582          *      Forget about the original request completely at this
1583          *      point.
1584          */
1585         request = coa;
1586
1587         gettimeofday(&request->proxy_when, NULL);
1588         request->received = request->next_when = request->proxy_when;
1589         rad_assert(request->proxy_reply == NULL);
1590
1591         /*
1592          *      Implement re-transmit algorithm as per RFC 5080
1593          *      Section 2.2.1.
1594          *
1595          *      We want IRT + RAND*IRT
1596          *      or 0.9 IRT + rand(0,.2) IRT
1597          *
1598          *      2^20 ~ USEC, and we want 2.
1599          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1600          */
1601         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1602         request->delay = delay * request->home_server->coa_irt;
1603         delay = request->home_server->coa_irt * USEC;
1604         delay -= delay / 10;
1605         delay += request->delay;
1606
1607         request->delay = delay;
1608         tv_add(&request->next_when, delay);
1609         request->next_callback = retransmit_coa_request;
1610
1611         /*
1612          *      Note that we set proxied BEFORE sending the packet.
1613          *
1614          *      Once we send it, the request is tainted, as
1615          *      another thread may have picked it up.  Don't
1616          *      touch it!
1617          */
1618         request->num_proxied_requests = 1;
1619         request->num_proxied_responses = 0;
1620         request->child_pid = NO_SUCH_CHILD_PID;
1621
1622         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1623
1624         request->child_state = REQUEST_PROXIED;
1625
1626         DEBUG_PACKET(request, request->proxy, 1);
1627
1628         request->proxy_listener->send(request->proxy_listener,
1629                                       request);
1630         return 1;
1631 }
1632 #endif  /* WITH_COA */
1633
1634 #ifdef WITH_PROXY
1635 static int process_proxy_reply(REQUEST *request)
1636 {
1637         int rcode;
1638         int post_proxy_type = 0;
1639         VALUE_PAIR *vp;
1640
1641         /*
1642          *      Delete any reply we had accumulated until now.
1643          */
1644         pairfree(&request->reply->vps);
1645
1646         /*
1647          *      Run the packet through the post-proxy stage,
1648          *      BEFORE playing games with the attributes.
1649          */
1650         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1651         if (vp) {
1652                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1653                 post_proxy_type = vp->vp_integer;
1654         }
1655
1656         if (request->home_pool && request->home_pool->virtual_server) {
1657                 const char *old_server = request->server;
1658
1659                 request->server = request->home_pool->virtual_server;
1660                 RDEBUG2(" server %s {", request->server);
1661                 rcode = module_post_proxy(post_proxy_type, request);
1662                 RDEBUG2(" }");
1663                 request->server = old_server;
1664         } else {
1665                 rcode = module_post_proxy(post_proxy_type, request);
1666         }
1667
1668 #ifdef WITH_COA
1669         if (request->packet->code == request->proxy->code)
1670           /*
1671            *    Don't run the next bit if we originated a CoA
1672            *    packet, after receiving an Access-Request or
1673            *    Accounting-Request.
1674            */
1675 #endif
1676
1677         /*
1678          *      There may NOT be a proxy reply, as we may be
1679          *      running Post-Proxy-Type = Fail.
1680          */
1681         if (request->proxy_reply) {
1682                 /*
1683                  *      Delete the Proxy-State Attributes from
1684                  *      the reply.  These include Proxy-State
1685                  *      attributes from us and remote server.
1686                  */
1687                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1688
1689                 /*
1690                  *      Add the attributes left in the proxy
1691                  *      reply to the reply list.
1692                  */
1693                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1694                 request->proxy_reply->vps = NULL;
1695
1696                 /*
1697                  *      Free proxy request pairs.
1698                  */
1699                 pairfree(&request->proxy->vps);
1700         }
1701
1702         switch (rcode) {
1703         default:  /* Don't do anything */
1704                 break;
1705         case RLM_MODULE_FAIL:
1706                 /* FIXME: debug print stuff */
1707                 request->child_state = REQUEST_DONE;
1708                 return 0;
1709
1710         case RLM_MODULE_HANDLED:
1711                 /* FIXME: debug print stuff */
1712                 request->child_state = REQUEST_DONE;
1713                 return 0;
1714         }
1715
1716         return 1;
1717 }
1718 #endif
1719
1720 static int request_pre_handler(REQUEST *request)
1721 {
1722         int rcode;
1723
1724         rad_assert(request->magic == REQUEST_MAGIC);
1725         rad_assert(request->packet != NULL);
1726
1727         request->child_state = REQUEST_RUNNING;
1728
1729         /*
1730          *      Don't decode the packet if it's an internal "fake"
1731          *      request.  Instead, just return so that the caller can
1732          *      process it.
1733          */
1734         if (request->packet->dst_port == 0) {
1735                 request->username = pairfind(request->packet->vps,
1736                                              PW_USER_NAME);
1737                 request->password = pairfind(request->packet->vps,
1738                                              PW_USER_PASSWORD);
1739                 return 1;
1740         }
1741
1742 #ifdef WITH_PROXY
1743         /*
1744          *      Put the decoded packet into it's proper place.
1745          */
1746         if (request->proxy_reply != NULL) {
1747                 rcode = request->proxy_listener->decode(request->proxy_listener,
1748                                                         request);
1749                 DEBUG_PACKET(request, request->proxy_reply, 0);
1750         } else
1751 #endif
1752         if (request->packet->vps == NULL) {
1753                 rcode = request->listener->decode(request->listener, request);
1754
1755                 if (debug_condition) {
1756                         int result = FALSE;
1757                         const char *my_debug = debug_condition;
1758
1759                         /*
1760                          *      Ignore parse errors.
1761                          */
1762                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1763                                                   &my_debug, 1,
1764                                                   &result);
1765                         if (result) {
1766                                 request->options = 2;
1767                                 request->radlog = radlog_request;
1768                         }
1769                 }
1770
1771                 DEBUG_PACKET(request, request->packet, 0);
1772         } else {
1773                 rcode = 0;
1774         }
1775
1776         if (rcode < 0) {
1777                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1778                 request->child_state = REQUEST_DONE;
1779                 return 0;
1780         }
1781
1782         if (!request->username) {
1783                 request->username = pairfind(request->packet->vps,
1784                                              PW_USER_NAME);
1785         }
1786
1787 #ifdef WITH_PROXY
1788         if (request->proxy) {
1789                 return process_proxy_reply(request);
1790 #endif
1791         }
1792
1793         return 1;
1794 }
1795
1796
1797 #ifdef WITH_PROXY
1798 /*
1799  *      Do state handling when we proxy a request.
1800  */
1801 static int proxy_request(REQUEST *request)
1802 {
1803         struct timeval when;
1804         char buffer[128];
1805
1806         if (request->home_server->server) {
1807                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1808                 return 0;
1809         }
1810
1811         if (!insert_into_proxy_hash(request, FALSE)) {
1812                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1813                 return 0;
1814         }
1815
1816         request->proxy_listener->encode(request->proxy_listener, request);
1817
1818         when = request->received;
1819         when.tv_sec += request->root->max_request_time;
1820
1821         gettimeofday(&request->proxy_when, NULL);
1822
1823         request->next_when = request->proxy_when;
1824         request->next_when.tv_sec += request->home_server->response_window;
1825
1826         rad_assert(request->home_server->response_window > 0);
1827
1828         if (timercmp(&when, &request->next_when, <)) {
1829                 request->next_when = when;
1830         }
1831         request->next_callback = no_response_to_proxied_request;
1832
1833         RDEBUG2("Proxying request %d to home server %s port %d",
1834                request->number,
1835                inet_ntop(request->proxy->dst_ipaddr.af,
1836                          &request->proxy->dst_ipaddr.ipaddr,
1837                          buffer, sizeof(buffer)),
1838                request->proxy->dst_port);
1839
1840         /*
1841          *      Note that we set proxied BEFORE sending the packet.
1842          *
1843          *      Once we send it, the request is tainted, as
1844          *      another thread may have picked it up.  Don't
1845          *      touch it!
1846          */
1847         request->num_proxied_requests = 1;
1848         request->num_proxied_responses = 0;
1849 #ifdef HAVE_PTHREAD_H
1850         request->child_pid = NO_SUCH_CHILD_PID;
1851 #endif
1852         request->child_state = REQUEST_PROXIED;
1853
1854         DEBUG_PACKET(request, request->proxy, 1);
1855
1856         request->proxy_listener->send(request->proxy_listener,
1857                                       request);
1858         return 1;
1859 }
1860
1861
1862 /*
1863  *      "Proxy" the request by sending it to a new virtual server.
1864  */
1865 static int proxy_to_virtual_server(REQUEST *request)
1866 {
1867         REQUEST *fake;
1868         RAD_REQUEST_FUNP fun;
1869
1870         if (!request->home_server || !request->home_server->server) return 0;
1871
1872         if (request->parent) {
1873                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1874                 return 0;
1875         }
1876
1877         fake = request_alloc_fake(request);
1878         if (!fake) {
1879                 RDEBUG2("WARNING: Out of memory");
1880                 return 0;
1881         }
1882
1883         fake->packet->vps = paircopy(request->proxy->vps);
1884         fake->server = request->home_server->server;
1885
1886         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1887                 fun = rad_authenticate;
1888
1889 #ifdef WITH_ACCOUNTING
1890         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1891                 fun = rad_accounting;
1892 #endif
1893
1894         } else {
1895                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1896                 ev_request_free(&fake);
1897                 return 0;
1898         }
1899
1900         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1901         radius_handle_request(fake, fun);
1902         RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
1903
1904         if (fake->reply->code != 0) {
1905                 request->proxy_reply = fake->reply;
1906                 fake->reply = NULL;
1907         } else {
1908                 /*
1909                  *      There was no response
1910                  */
1911                 setup_post_proxy_fail(request);
1912         }
1913
1914         ev_request_free(&fake);
1915
1916         process_proxy_reply(request);
1917
1918         /*
1919          *      Process it through the normal section again, but ONLY
1920          *      if we received a proxy reply..
1921          */
1922         if (request->proxy_reply) {
1923                 if (request->server) RDEBUG("server %s {",
1924                                             request->server != NULL ?
1925                                             request->server : "");
1926                 fun(request);
1927
1928                 if (request->server) RDEBUG("} # server %s",
1929                                             request->server != NULL ?
1930                                             request->server : "");
1931         }
1932
1933         return 2;               /* success, but NOT '1' !*/
1934 }
1935
1936 /*
1937  *      Return 1 if we did proxy it, or the proxy attempt failed
1938  *      completely.  Either way, the caller doesn't touch the request
1939  *      any more if we return 1.
1940  */
1941 static int successfully_proxied_request(REQUEST *request)
1942 {
1943         int rcode;
1944         int pre_proxy_type = 0;
1945         VALUE_PAIR *realmpair;
1946         VALUE_PAIR *strippedname;
1947         VALUE_PAIR *vp;
1948         char *realmname = NULL;
1949         home_server *home;
1950         REALM *realm = NULL;
1951         home_pool_t *pool;
1952
1953         /*
1954          *      If it was already proxied, do nothing.
1955          *
1956          *      FIXME: This should really be a serious error.
1957          */
1958         if (request->in_proxy_hash ||
1959             (request->proxy_reply && (request->proxy_reply->code != 0))) {
1960                 return 0;
1961         }
1962
1963         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
1964         if (!realmpair || (realmpair->length == 0)) {
1965                 int pool_type;
1966
1967                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
1968                 if (!vp) return 0;
1969
1970                 switch (request->packet->code) {
1971                 case PW_AUTHENTICATION_REQUEST:
1972                         pool_type = HOME_TYPE_AUTH;
1973                         break;
1974
1975 #ifdef WITH_ACCOUNTING
1976                 case PW_ACCOUNTING_REQUEST:
1977                         pool_type = HOME_TYPE_ACCT;
1978                         break;
1979 #endif
1980
1981 #ifdef WITH_COA
1982                 case PW_COA_REQUEST:
1983                 case PW_DISCONNECT_REQUEST:
1984                         pool_type = HOME_TYPE_COA;
1985                         break;
1986 #endif
1987
1988                 default:
1989                         return 0;
1990                 }
1991
1992                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
1993                 if (!pool) {
1994                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
1995                                 vp->vp_strvalue);
1996                         return 0;
1997                 }
1998
1999                 realmname = NULL; /* no realms */
2000                 realm = NULL;
2001                 goto found_pool;
2002         }
2003
2004         realmname = (char *) realmpair->vp_strvalue;
2005
2006         realm = realm_find2(realmname);
2007         if (!realm) {
2008                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2009                 return 0;
2010         }
2011
2012         /*
2013          *      Figure out which pool to use.
2014          */
2015         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2016                 pool = realm->auth_pool;
2017
2018 #ifdef WITH_ACCOUNTING
2019         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2020                 pool = realm->acct_pool;
2021 #endif
2022
2023 #ifdef WITH_COA
2024         } else if ((request->packet->code == PW_COA_REQUEST) ||
2025                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2026                 pool = realm->acct_pool;
2027 #endif
2028
2029         } else {
2030                 rad_panic("Internal sanity check failed");
2031         }
2032
2033         if (!pool) {
2034                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2035                        realmname);
2036                 return 0;
2037         }
2038
2039 found_pool:
2040         home = home_server_ldb(realmname, pool, request);
2041         if (!home) {
2042                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2043                        realmname);
2044                 return -1;
2045         }
2046         request->home_pool = pool;
2047
2048 #ifdef WITH_COA
2049         /*
2050          *      Once we've decided to proxy a request, we cannot send
2051          *      a CoA packet.  So we free up any CoA packet here.
2052          */
2053         ev_request_free(&request->coa);
2054 #endif
2055         /*
2056          *      Remember that we sent the request to a Realm.
2057          */
2058         if (realmname) pairadd(&request->packet->vps,
2059                                pairmake("Realm", realmname, T_OP_EQ));
2060
2061         /*
2062          *      Strip the name, if told to.
2063          *
2064          *      Doing it here catches the case of proxied tunneled
2065          *      requests.
2066          */
2067         if (realm && (realm->striprealm == TRUE) &&
2068            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2069                 /*
2070                  *      If there's a Stripped-User-Name attribute in
2071                  *      the request, then use THAT as the User-Name
2072                  *      for the proxied request, instead of the
2073                  *      original name.
2074                  *
2075                  *      This is done by making a copy of the
2076                  *      Stripped-User-Name attribute, turning it into
2077                  *      a User-Name attribute, deleting the
2078                  *      Stripped-User-Name and User-Name attributes
2079                  *      from the vps list, and making the new
2080                  *      User-Name the head of the vps list.
2081                  */
2082                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2083                 if (!vp) {
2084                         vp = radius_paircreate(request, NULL,
2085                                                PW_USER_NAME, PW_TYPE_STRING);
2086                         rad_assert(vp != NULL); /* handled by above function */
2087                         /* Insert at the START of the list */
2088                         vp->next = request->proxy->vps;
2089                         request->proxy->vps = vp;
2090                 }
2091                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2092                        sizeof(vp->vp_strvalue));
2093                 vp->length = strippedname->length;
2094
2095                 /*
2096                  *      Do NOT delete Stripped-User-Name.
2097                  */
2098         }
2099
2100         /*
2101          *      If there is no PW_CHAP_CHALLENGE attribute but
2102          *      there is a PW_CHAP_PASSWORD we need to add it
2103          *      since we can't use the request authenticator
2104          *      anymore - we changed it.
2105          */
2106         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2107             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2108             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2109                 vp = radius_paircreate(request, &request->proxy->vps,
2110                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2111                 vp->length = AUTH_VECTOR_LEN;
2112                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2113         }
2114
2115         /*
2116          *      The RFC's say we have to do this, but FreeRADIUS
2117          *      doesn't need it.
2118          */
2119         vp = radius_paircreate(request, &request->proxy->vps,
2120                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2121         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2122                  request->packet->id);
2123         vp->length = strlen(vp->vp_strvalue);
2124
2125         /*
2126          *      Should be done BEFORE inserting into proxy hash, as
2127          *      pre-proxy may use this information, or change it.
2128          */
2129         request->proxy->code = request->packet->code;
2130
2131         /*
2132          *      Call the pre-proxy routines.
2133          */
2134         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2135         if (vp) {
2136                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2137                 pre_proxy_type = vp->vp_integer;
2138         }
2139
2140         rad_assert(request->home_pool != NULL);
2141
2142         if (request->home_pool->virtual_server) {
2143                 const char *old_server = request->server;
2144
2145                 request->server = request->home_pool->virtual_server;
2146                 RDEBUG2(" server %s {", request->server);
2147                 rcode = module_pre_proxy(pre_proxy_type, request);
2148                 RDEBUG2(" }");
2149                         request->server = old_server;
2150         } else {
2151                 rcode = module_pre_proxy(pre_proxy_type, request);
2152         }
2153         switch (rcode) {
2154         case RLM_MODULE_FAIL:
2155         case RLM_MODULE_INVALID:
2156         case RLM_MODULE_NOTFOUND:
2157         case RLM_MODULE_USERLOCK:
2158         default:
2159                 /* FIXME: debug print failed stuff */
2160                 return -1;
2161
2162         case RLM_MODULE_REJECT:
2163         case RLM_MODULE_HANDLED:
2164                 return 0;
2165
2166         /*
2167          *      Only proxy the packet if the pre-proxy code succeeded.
2168          */
2169         case RLM_MODULE_NOOP:
2170         case RLM_MODULE_OK:
2171         case RLM_MODULE_UPDATED:
2172                 break;
2173         }
2174
2175         /*
2176          *      If it's a fake request, don't send the proxy
2177          *      packet.  The outer tunnel session will take
2178          *      care of doing that.
2179          */
2180         if (request->packet->dst_port == 0) {
2181                 request->home_server = NULL;
2182                 return 1;
2183         }
2184
2185         if (request->home_server->server) {
2186                 return proxy_to_virtual_server(request);
2187         }
2188
2189         if (!proxy_request(request)) {
2190                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2191                 return -1;
2192         }
2193
2194         return 1;
2195 }
2196 #endif
2197
2198 static void request_post_handler(REQUEST *request)
2199 {
2200         int child_state = -1;
2201         struct timeval when;
2202         VALUE_PAIR *vp;
2203
2204         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2205             (request->parent &&
2206              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2207                 RDEBUG2("Request %d was cancelled.", request->number);
2208 #ifdef HAVE_PTHREAD_H
2209                 request->child_pid = NO_SUCH_CHILD_PID;
2210 #endif
2211                 child_state = REQUEST_DONE;
2212                 goto cleanup;
2213         }
2214
2215         if (request->child_state != REQUEST_RUNNING) {
2216                 rad_panic("Internal sanity check failed");
2217         }
2218
2219 #ifdef WITH_COA
2220         /*
2221          *      If it's not in the request hash, it's a CoA request.
2222          *      We hope.
2223          */
2224         if (!request->in_request_hash &&
2225             request->proxy &&
2226             ((request->proxy->code == PW_COA_REQUEST) ||
2227              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2228                 request->next_callback = NULL;
2229                 child_state = REQUEST_DONE;
2230                 goto cleanup;
2231         }
2232 #endif
2233
2234         /*
2235          *      Catch Auth-Type := Reject BEFORE proxying the packet.
2236          */
2237         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2238             (request->reply->code == 0) &&
2239             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2240             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2241                 request->reply->code = PW_AUTHENTICATION_REJECT;
2242         }
2243
2244 #ifdef WITH_PROXY
2245         if (request->root->proxy_requests &&
2246             !request->in_proxy_hash &&
2247             (request->reply->code == 0) &&
2248             (request->packet->dst_port != 0) &&
2249             (request->packet->code != PW_STATUS_SERVER)) {
2250                 int rcode = successfully_proxied_request(request);
2251
2252                 if (rcode == 1) return; /* request is invalid */
2253
2254                 /*
2255                  *      Failed proxying it (dead home servers, etc.)
2256                  *      Run it through Post-Proxy-Type = Fail, and
2257                  *      respond to the request.
2258                  *
2259                  *      Note that we're in a child thread here, so we
2260                  *      do NOT re-schedule the request.  Instead, we
2261                  *      do what we would have done, which is run the
2262                  *      pre-handler, a NULL request handler, and then
2263                  *      the post handler.
2264                  */
2265                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2266                         request_pre_handler(request);
2267                 }
2268
2269                 /*
2270                  *      Else we weren't supposed to proxy it,
2271                  *      OR we proxied it internally to a virutal server.
2272                  */
2273         }
2274 #endif
2275
2276         /*
2277          *      Fake requests don't get encoded or signed.  The caller
2278          *      also requires the reply VP's, so we don't free them
2279          *      here!
2280          */
2281         if (request->packet->dst_port == 0) {
2282                 /* FIXME: RDEBUG going to the next request */
2283 #ifdef HAVE_PTHREAD_H
2284                 request->child_pid = NO_SUCH_CHILD_PID;
2285 #endif
2286                 request->child_state = REQUEST_DONE;
2287                 return;
2288         }
2289
2290 #ifdef WITH_PROXY
2291         /*
2292          *      Copy Proxy-State from the request to the reply.
2293          */
2294         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2295         if (vp) pairadd(&request->reply->vps, vp);
2296 #endif
2297
2298         /*
2299          *      Access-Requests get delayed or cached.
2300          */
2301         switch (request->packet->code) {
2302         case PW_AUTHENTICATION_REQUEST:
2303                 gettimeofday(&request->next_when, NULL);
2304
2305                 if (request->reply->code == 0) {
2306                         /*
2307                          *      Check if the lack of response is intentional.
2308                          */
2309                         vp = pairfind(request->config_items,
2310                                       PW_RESPONSE_PACKET_TYPE);
2311                         if (!vp) {
2312                                 RDEBUG2("There was no response configured: rejecting request %d",
2313                                        request->number);
2314                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2315
2316                         } else if (vp->vp_integer == 256) {
2317                                 RDEBUG2("Not responding to request %d",
2318                                        request->number);
2319
2320                                 /*
2321                                  *      Force cleanup after a long
2322                                  *      time, so that we don't
2323                                  *      re-process the packet.
2324                                  */
2325                                 request->next_when.tv_sec += request->root->max_request_time;
2326                                 request->next_callback = cleanup_delay;
2327                                 child_state = REQUEST_CLEANUP_DELAY;
2328                                 break;
2329                         } else {
2330                                 request->reply->code = vp->vp_integer;
2331
2332                         }
2333                 }
2334
2335                 /*
2336                  *      Run rejected packets through
2337                  *
2338                  *      Post-Auth-Type = Reject
2339                  */
2340                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2341                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2342                         vp = radius_pairmake(request, &request->config_items,
2343                                              "Post-Auth-Type", "Reject",
2344                                              T_OP_SET);
2345                         if (vp) rad_postauth(request);
2346
2347                         /*
2348                          *      If configured, delay Access-Reject packets.
2349                          *
2350                          *      If request->root->reject_delay = 0, we discover
2351                          *      that we have to send the packet now.
2352                          */
2353                         when = request->received;
2354                         when.tv_sec += request->root->reject_delay;
2355
2356                         if (timercmp(&when, &request->next_when, >)) {
2357                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2358                                        request->number,
2359                                        request->root->reject_delay);
2360                                 request->next_when = when;
2361                                 request->next_callback = reject_delay;
2362 #ifdef HAVE_PTHREAD_H
2363                                 request->child_pid = NO_SUCH_CHILD_PID;
2364 #endif
2365                                 request->child_state = REQUEST_REJECT_DELAY;
2366                                 return;
2367                         }
2368                 }
2369
2370 #ifdef WITH_COA
2371         case PW_COA_REQUEST:
2372         case PW_DISCONNECT_REQUEST:
2373 #endif
2374                 request->next_when.tv_sec += request->root->cleanup_delay;
2375                 request->next_callback = cleanup_delay;
2376                 child_state = REQUEST_CLEANUP_DELAY;
2377                 break;
2378
2379         case PW_ACCOUNTING_REQUEST:
2380                 request->next_callback = NULL; /* just to be safe */
2381                 child_state = REQUEST_DONE;
2382                 break;
2383
2384                 /*
2385                  *      FIXME: Status-Server should probably not be
2386                  *      handled here...
2387                  */
2388         case PW_STATUS_SERVER:
2389                 request->next_callback = NULL;
2390                 child_state = REQUEST_DONE;
2391                 break;
2392
2393         default:
2394                 /*
2395                  *      DHCP, VMPS, etc.
2396                  */
2397                 request->next_callback = NULL;
2398                 child_state = REQUEST_DONE;
2399                 break;
2400         }
2401
2402         /*
2403          *      Suppress "no reply" packets here, unless we're reading
2404          *      from the "detail" file.  In that case, we've got to
2405          *      tell the detail file handler that the request is dead,
2406          *      and it should re-send it.
2407          *      If configured, encode, sign, and send.
2408          */
2409         if ((request->reply->code != 0) ||
2410             (request->listener->type == RAD_LISTEN_DETAIL)) {
2411                 DEBUG_PACKET(request, request->reply, 1);
2412                 request->listener->send(request->listener, request);
2413         }
2414
2415 #ifdef WITH_COA
2416         /*
2417          *      Now that we've completely processed the request,
2418          *      see if we need to originate a CoA request.
2419          */
2420         if (request->coa ||
2421             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2422                 if (!originated_coa_request(request)) {
2423                         RDEBUG2("Do CoA Fail handler here");
2424                 }
2425                 /* request->coa is stil set, so we can update events */
2426         }
2427 #endif
2428
2429  cleanup:
2430         /*
2431          *      Clean up.  These are no longer needed.
2432          */
2433         pairfree(&request->config_items);
2434
2435         pairfree(&request->packet->vps);
2436         request->username = NULL;
2437         request->password = NULL;
2438
2439         pairfree(&request->reply->vps);
2440
2441 #ifdef WITH_PROXY
2442         if (request->proxy) {
2443                 pairfree(&request->proxy->vps);
2444
2445                 if (request->proxy_reply) {
2446                         pairfree(&request->proxy_reply->vps);
2447                 }
2448
2449 #if 0
2450                 /*
2451                  *      We're not tracking responses from the home
2452                  *      server, we can therefore free this memory in
2453                  *      the child thread.
2454                  */
2455                 if (!request->in_proxy_hash) {
2456                         rad_free(&request->proxy);
2457                         rad_free(&request->proxy_reply);
2458                         request->home_server = NULL;
2459                 }
2460 #endif
2461         }
2462 #endif
2463
2464         RDEBUG2("Finished request %d.", request->number);
2465         rad_assert(child_state >= 0);
2466         request->child_state = child_state;
2467
2468         /*
2469          *      Single threaded mode: update timers now.
2470          */
2471         if (!have_children) wait_a_bit(request);
2472 }
2473
2474
2475 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2476 {
2477 #ifdef WITH_PROXY
2478         char buffer[128];
2479 #endif
2480
2481         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2482         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2483
2484         switch (request->child_state) {
2485         case REQUEST_QUEUED:
2486         case REQUEST_RUNNING:
2487 #ifdef WITH_PROXY
2488         discard:
2489 #endif
2490                 radlog(L_ERR, "Discarding duplicate request from "
2491                        "client %s port %d - ID: %d due to unfinished request %d",
2492                        client->shortname,
2493                        request->packet->src_port,request->packet->id,
2494                        request->number);
2495                 break;
2496
2497 #ifdef WITH_PROXY
2498         case REQUEST_PROXIED:
2499                 /*
2500                  *      We're not supposed to have duplicate
2501                  *      accounting packets.  The other states handle
2502                  *      duplicates fine (discard, or send duplicate
2503                  *      reply).  But we do NOT want to retransmit an
2504                  *      accounting request here, because that would
2505                  *      involve updating the Acct-Delay-Time, and
2506                  *      therefore changing the packet Id, etc.
2507                  *
2508                  *      Instead, we just discard the packet.  We may
2509                  *      eventually respond, or the client will send a
2510                  *      new accounting packet.
2511                  *
2512                  *      The same comments go for Status-Server, and
2513                  *      other packet types.
2514                  *
2515                  *      FIXME: coa: when we proxy CoA && Disconnect
2516                  *      packets, this logic has to be fixed.
2517                  */
2518                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2519                         goto discard;
2520                 }
2521
2522                 check_for_zombie_home_server(request);
2523
2524                 /*
2525                  *      If we've just discovered that the home server is
2526                  *      dead, send the packet to another one.
2527                  */
2528                 if ((request->packet->dst_port != 0) &&
2529                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2530                         home_server *home;
2531
2532                         remove_from_proxy_hash(request);
2533
2534                         home = home_server_ldb(NULL, request->home_pool, request);
2535                         if (!home) {
2536                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2537                         no_home_servers:
2538                                 /*
2539                                  *      Do post-request processing,
2540                                  *      and any insertion of necessary
2541                                  *      events.
2542                                  */
2543                                 post_proxy_fail_handler(request);
2544                                 return;
2545                         }
2546
2547                         request->proxy->code = request->packet->code;
2548
2549                         /*
2550                          *      Free the old packet, to force re-encoding
2551                          */
2552                         free(request->proxy->data);
2553                         request->proxy->data = NULL;
2554                         request->proxy->data_len = 0;
2555
2556                         /*
2557                          *      This request failed over to a virtual
2558                          *      server.  Push it back onto the queue
2559                          *      to be processed.
2560                          */
2561                         if (request->home_server->server) {
2562                                 proxy_fallback_handler(request);
2563                                 return;
2564                         }
2565
2566                         /*
2567                          *      Try to proxy the request.
2568                          */
2569                         if (!proxy_request(request)) {
2570                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2571                                 goto no_home_servers;
2572                         }
2573
2574                         /*
2575                          *      This code executes in the main server
2576                          *      thread, so there's no need for locking.
2577                          */
2578                         rad_assert(request->next_callback != NULL);
2579                         INSERT_EVENT(request->next_callback, request);
2580                         request->next_callback = NULL;
2581                         return;
2582                 } /* else the home server is still alive */
2583
2584                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2585                        inet_ntop(request->proxy->dst_ipaddr.af,
2586                                  &request->proxy->dst_ipaddr.ipaddr,
2587                                  buffer, sizeof(buffer)),
2588                        request->proxy->dst_port,
2589                        request->proxy->id);
2590                 request->num_proxied_requests++;
2591
2592                 DEBUG_PACKET(request, request->proxy, 1);
2593                 request->proxy_listener->send(request->proxy_listener,
2594                                               request);
2595                 break;
2596 #endif
2597
2598         case REQUEST_REJECT_DELAY:
2599                 RDEBUG2("Waiting to send Access-Reject "
2600                        "to client %s port %d - ID: %d",
2601                        client->shortname,
2602                        request->packet->src_port, request->packet->id);
2603                 break;
2604
2605         case REQUEST_CLEANUP_DELAY:
2606         case REQUEST_DONE:
2607                 if (request->reply->code == 0) {
2608                         RDEBUG2("Ignoring retransmit from client %s port %d "
2609                                 "- ID: %d, no reply was configured",
2610                                 client->shortname,
2611                                 request->packet->src_port, request->packet->id);
2612                         return;
2613                 }
2614
2615                 /*
2616                  *      FIXME: This sends duplicate replies to
2617                  *      accounting requests, even if Acct-Delay-Time
2618                  *      or Event-Timestamp is in the packet.  In those
2619                  *      cases, the Id should be changed, and the packet
2620                  *      re-calculated.
2621                  */
2622                 RDEBUG2("Sending duplicate reply "
2623                        "to client %s port %d - ID: %d",
2624                        client->shortname,
2625                        request->packet->src_port, request->packet->id);
2626                 DEBUG_PACKET(request, request->reply, 1);
2627                 request->listener->send(request->listener, request);
2628                 break;
2629         }
2630 }
2631
2632
2633 static void received_conflicting_request(REQUEST *request,
2634                                          const RADCLIENT *client)
2635 {
2636         radlog(L_ERR, "Received conflicting packet from "
2637                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2638                client->shortname,
2639                request->packet->src_port, request->packet->id,
2640                request->number);
2641
2642         /*
2643          *      Nuke it from the request hash, so we can receive new
2644          *      packets.
2645          */
2646         remove_from_request_hash(request);
2647
2648         switch (request->child_state) {
2649 #ifdef HAVE_PTHREAD_H
2650                 /*
2651                  *      It's queued or running.  Tell it to stop, and
2652                  *      wait for it to do so.
2653                  */
2654         case REQUEST_QUEUED:
2655         case REQUEST_RUNNING:
2656                 request->master_state = REQUEST_STOP_PROCESSING;
2657                 request->delay += request->delay >> 1;
2658
2659                 tv_add(&request->when, request->delay);
2660
2661                 INSERT_EVENT(wait_for_child_to_die, request);
2662                 return;
2663 #endif
2664
2665                 /*
2666                  *      Catch race conditions.  It may have switched
2667                  *      from running to done while this code is being
2668                  *      executed.
2669                  */
2670         case REQUEST_REJECT_DELAY:
2671         case REQUEST_CLEANUP_DELAY:
2672         case REQUEST_DONE:
2673                 break;
2674
2675                 /*
2676                  *      It's in some other state, and therefore also
2677                  *      in the event queue.  At some point, the
2678                  *      child will notice, and we can then delete it.
2679                  */
2680         case REQUEST_PROXIED:
2681         default:
2682                 rad_assert(request->ev != NULL);
2683                 break;
2684         }
2685 }
2686
2687
2688 static int can_handle_new_request(RADIUS_PACKET *packet,
2689                                   RADCLIENT *client,
2690                                   struct main_config_t *root)
2691 {
2692         /*
2693          *      Count the total number of requests, to see if
2694          *      there are too many.  If so, return with an
2695          *      error.
2696          */
2697         if (root->max_requests) {
2698                 int request_count = fr_packet_list_num_elements(pl);
2699
2700                 /*
2701                  *      This is a new request.  Let's see if
2702                  *      it makes us go over our configured
2703                  *      bounds.
2704                  */
2705                 if (request_count > root->max_requests) {
2706                         radlog(L_ERR, "Dropping request (%d is too many): "
2707                                "from client %s port %d - ID: %d", request_count,
2708                                client->shortname,
2709                                packet->src_port, packet->id);
2710                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2711                                "\tThe value for 'max_requests' is probably set too low.\n");
2712                         return 0;
2713                 } /* else there were a small number of requests */
2714         } /* else there was no configured limit for requests */
2715
2716         /*
2717          *      FIXME: Add per-client checks.  If one client is sending
2718          *      too many packets, start discarding them.
2719          *
2720          *      We increment the counters here, and decrement them
2721          *      when the response is sent... somewhere in this file.
2722          */
2723
2724         /*
2725          *      FUTURE: Add checks for system load.  If the system is
2726          *      busy, start dropping requests...
2727          *
2728          *      We can probably keep some statistics ourselves...  if
2729          *      there are more requests coming in than we can handle,
2730          *      start dropping some.
2731          */
2732
2733         return 1;
2734 }
2735
2736
2737 int received_request(rad_listen_t *listener,
2738                      RADIUS_PACKET *packet, REQUEST **prequest,
2739                      RADCLIENT *client)
2740 {
2741         RADIUS_PACKET **packet_p;
2742         REQUEST *request = NULL;
2743         struct main_config_t *root = &mainconfig;
2744
2745         packet_p = fr_packet_list_find(pl, packet);
2746         if (packet_p) {
2747                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2748                 rad_assert(request->in_request_hash);
2749
2750                 if ((request->packet->data_len == packet->data_len) &&
2751                     (memcmp(request->packet->vector, packet->vector,
2752                             sizeof(packet->vector)) == 0)) {
2753                         received_retransmit(request, client);
2754                         return 0;
2755                 }
2756
2757                 /*
2758                  *      The new request is different from the old one,
2759                  *      but maybe the old is finished.  If so, delete
2760                  *      the old one.
2761                  */
2762                 switch (request->child_state) {
2763                         struct timeval when;
2764
2765                 default:
2766                         /*
2767                          *      Special hacks for race conditions.
2768                          *      The reply is encoded, and therefore
2769                          *      likely sent.  We received a *new*
2770                          *      packet from the client, likely before
2771                          *      the next line or two of code which
2772                          *      updated the child state.  In this
2773                          *      case, just accept the new request.
2774                          */
2775                         if ((request->reply->code != 0) &&
2776                             request->reply->data) {
2777                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2778                                        client->shortname,
2779                                        packet->src_port, packet->id,
2780                                        request->number);
2781                                 remove_from_request_hash(request);
2782                                 request = NULL;
2783                                 break;
2784                         }
2785
2786                         gettimeofday(&when, NULL);
2787                         when.tv_sec -= 1;
2788
2789                         /*
2790                          *      If the cached request was received
2791                          *      within the last second, then we
2792                          *      discard the NEW request instead of the
2793                          *      old one.  This will happen ONLY when
2794                          *      the client is severely broken, and is
2795                          *      sending conflicting packets very
2796                          *      quickly.
2797                          */
2798                         if (timercmp(&when, &request->received, <)) {
2799                                 radlog(L_ERR, "Discarding conflicting packet from "
2800                                        "client %s port %d - ID: %d due to recent request %d.",
2801                                        client->shortname,
2802                                        packet->src_port, packet->id,
2803                                        request->number);
2804                                 return 0;
2805                         }
2806
2807                         received_conflicting_request(request, client);
2808                         request = NULL;
2809                         break;
2810
2811                 case REQUEST_REJECT_DELAY:
2812                 case REQUEST_CLEANUP_DELAY:
2813                         request->child_state = REQUEST_DONE;
2814                 case REQUEST_DONE:
2815                         cleanup_delay(request);
2816                         request = NULL;
2817                         break;
2818                 }
2819         }
2820
2821         /*
2822          *      We may want to quench the new request.
2823          */
2824         if ((listener->type != RAD_LISTEN_DETAIL) &&
2825             !can_handle_new_request(packet, client, root)) {
2826                 return 0;
2827         }
2828
2829         /*
2830          *      Create and initialize the new request.
2831          */
2832         request = request_alloc(); /* never fails */
2833
2834         if ((request->reply = rad_alloc(0)) == NULL) {
2835                 radlog(L_ERR, "No memory");
2836                 exit(1);
2837         }
2838
2839         request->listener = listener;
2840         request->client = client;
2841         request->packet = packet;
2842         request->packet->timestamp = request->timestamp;
2843         request->number = request_num_counter++;
2844         request->priority = listener->type;
2845 #ifdef HAVE_PTHREAD_H
2846         request->child_pid = NO_SUCH_CHILD_PID;
2847 #endif
2848
2849         /*
2850          *      Status-Server packets go to the head of the queue.
2851          */
2852         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2853
2854         /*
2855          *      Set virtual server identity
2856          */
2857         if (client->server) {
2858                 request->server = client->server;
2859         } else if (listener->server) {
2860                 request->server = listener->server;
2861         } else {
2862                 request->server = NULL;
2863         }
2864
2865         /*
2866          *      Remember the request in the list.
2867          */
2868         if (!fr_packet_list_insert(pl, &request->packet)) {
2869                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2870                 ev_request_free(&request);
2871                 return 0;
2872         }
2873
2874         request->in_request_hash = TRUE;
2875         request->root = root;
2876         root->refcount++;
2877
2878         /*
2879          *      The request passes many of our sanity checks.
2880          *      From here on in, if anything goes wrong, we
2881          *      send a reject message, instead of dropping the
2882          *      packet.
2883          */
2884
2885         /*
2886          *      Build the reply template from the request.
2887          */
2888
2889         request->reply->sockfd = request->packet->sockfd;
2890         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2891         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2892         request->reply->dst_port = request->packet->src_port;
2893         request->reply->src_port = request->packet->dst_port;
2894         request->reply->id = request->packet->id;
2895         request->reply->code = 0; /* UNKNOWN code */
2896         memcpy(request->reply->vector, request->packet->vector,
2897                sizeof(request->reply->vector));
2898         request->reply->vps = NULL;
2899         request->reply->data = NULL;
2900         request->reply->data_len = 0;
2901
2902         request->master_state = REQUEST_ACTIVE;
2903         request->child_state = REQUEST_QUEUED;
2904         request->next_callback = NULL;
2905
2906         gettimeofday(&request->received, NULL);
2907         request->timestamp = request->received.tv_sec;
2908         request->when = request->received;
2909
2910         request->delay = USEC;
2911
2912         tv_add(&request->when, request->delay);
2913
2914         INSERT_EVENT(wait_a_bit, request);
2915
2916         *prequest = request;
2917         return 1;
2918 }
2919
2920
2921 #ifdef WITH_PROXY
2922 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2923 {
2924         char            buffer[128];
2925         REQUEST         *request;
2926
2927         /*
2928          *      Also removes from the proxy hash if responses == requests
2929          */
2930         request = lookup_in_proxy_hash(packet);
2931
2932         if (!request) {
2933                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2934                        inet_ntop(packet->src_ipaddr.af,
2935                                  &packet->src_ipaddr.ipaddr,
2936                                  buffer, sizeof(buffer)),
2937                        packet->src_port, packet->id);
2938                 return NULL;
2939         }
2940
2941         /*
2942          *      We haven't replied to the NAS, but we have seen an
2943          *      earlier reply from the home server.  Ignore this packet,
2944          *      as we're likely still processing the previous reply.
2945          */
2946         if (request->proxy_reply) {
2947                 if (memcmp(request->proxy_reply->vector,
2948                            packet->vector,
2949                            sizeof(request->proxy_reply->vector)) == 0) {
2950                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
2951                                inet_ntop(packet->src_ipaddr.af,
2952                                          &packet->src_ipaddr.ipaddr,
2953                                          buffer, sizeof(buffer)),
2954                                packet->src_port, packet->id,
2955                                request->number);
2956                 } else {
2957                         /*
2958                          *      ? The home server gave us a new proxy
2959                          *      reply which doesn't match the old
2960                          *      one.  Delete it.
2961                          */
2962                         RDEBUG2("Ignoring conflicting proxy reply");
2963                 }
2964
2965                 /* assert that there's an event queued for request? */
2966                 return NULL;
2967         }
2968
2969         /*
2970          *      Verify the packet before doing ANYTHING with it.  This
2971          *      means we're doing more MD5 checks in the server core.
2972          *      However, we can fix that by moving to multiple threads
2973          *      listening on sockets.
2974          *
2975          *      We do this AFTER looking the request up in the hash,
2976          *      and AFTER vhecking if we saw a previous request.  This
2977          *      helps minimize the DoS effect of people attacking us
2978          *      with spoofed packets.
2979          */
2980         if (rad_verify(packet, request->proxy,
2981                        request->home_server->secret) != 0) {
2982                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
2983                 return NULL;
2984         }
2985
2986         gettimeofday(&now, NULL);
2987
2988         /*
2989          *      Maybe move this earlier in the decision process?
2990          *      Having it here means that late or duplicate proxy
2991          *      replies no longer get the home server marked as
2992          *      "alive".  This might be good for stability, though.
2993          *
2994          *      FIXME: Do we really want to do this whenever we
2995          *      receive a packet?  Setting this here means that we
2996          *      mark it alive on *any* packet, even if it's lost all
2997          *      of the *other* packets in the last 10s.
2998          */
2999         request->home_server->state = HOME_STATE_ALIVE;
3000
3001 #ifdef WITH_COA
3002         /*
3003          *      When originating CoA, the "proxy" reply is the reply
3004          *      to the CoA request that we originated.  At this point,
3005          *      the original request is finished, and it has a reply.
3006          *
3007          *      However, if we haven't separated the two requests, do
3008          *      so now.  This is done so that cleaning up the original
3009          *      request won't cause the CoA request to be free'd.  See
3010          *      util.c, request_free()
3011          */
3012         if (request->parent && (request->parent->coa == request)) {
3013                 request->parent->coa = NULL;
3014                 request->parent = NULL;
3015
3016         } else
3017                 /*
3018                  *      Skip the next set of checks, as the original
3019                  *      reply is cached.  We want to be able to still
3020                  *      process the CoA reply, AND to reference the
3021                  *      original request/reply.
3022                  *
3023                  *      This is getting to be really quite a bit of a
3024                  *      hack.
3025                  */
3026 #endif
3027
3028         /*
3029          *      If there's a reply to the NAS, ignore everything
3030          *      related to proxy responses
3031          */
3032         if (request->reply && request->reply->code != 0) {
3033                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3034                 return NULL;
3035         }
3036
3037 #ifdef WITH_STATS
3038         /*
3039          *      The average includes our time to receive packets and
3040          *      look them up in the hashes, which should be the same
3041          *      for all packets.
3042          *
3043          *      We update the response time only for the FIRST packet
3044          *      we receive.
3045          */
3046         if (request->home_server->ema.window > 0) {
3047                 radius_stats_ema(&request->home_server->ema,
3048                                  &now, &request->proxy_when);
3049         }
3050 #endif
3051
3052         switch (request->child_state) {
3053         case REQUEST_QUEUED:
3054         case REQUEST_RUNNING:
3055                 radlog(L_ERR, "Internal sanity check failed for child state");
3056                 /* FALL-THROUGH */
3057
3058         case REQUEST_REJECT_DELAY:
3059         case REQUEST_CLEANUP_DELAY:
3060         case REQUEST_DONE:
3061                 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'",
3062                        inet_ntop(packet->src_ipaddr.af,
3063                                  &packet->src_ipaddr.ipaddr,
3064                                  buffer, sizeof(buffer)),
3065                        packet->src_port, packet->id,
3066                        request->number);
3067                 /* assert that there's an event queued for request? */
3068                 return NULL;
3069
3070         case REQUEST_PROXIED:
3071                 break;
3072         }
3073
3074         request->proxy_reply = packet;
3075
3076 #if 0
3077         /*
3078          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3079          *      Note that we only do so on the first response.
3080          */
3081         if ((request->num_proxied_responses == 1)
3082                 int rtt;
3083                 home_server *home = request->home_server;
3084
3085                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3086                 rtt *= USEC;
3087                 rtt += now.tv_usec;
3088                 rtt -= request->proxy_when.tv_usec;
3089
3090                 if (!home->has_rtt) {
3091                         home->has_rtt = TRUE;
3092
3093                         home->srtt = rtt;
3094                         home->rttvar = rtt / 2;
3095
3096                 } else {
3097                         home->rttvar -= home->rttvar >> 2;
3098                         home->rttvar += (home->srtt - rtt);
3099                         home->srtt -= home->srtt >> 3;
3100                         home->srtt += rtt >> 3;
3101                 }
3102
3103                 home->rto = home->srtt;
3104                 if (home->rttvar > (USEC / 4)) {
3105                         home->rto += home->rttvar * 4;
3106                 } else {
3107                         home->rto += USEC;
3108                 }
3109         }
3110 #endif
3111
3112         /*
3113          *      There's no incoming request, so it's a proxied packet
3114          *      we originated.
3115          */
3116         if (!request->packet) {
3117                 received_response_to_ping(request);
3118                 request->proxy_reply = NULL; /* caller will free it */
3119                 ev_request_free(&request);
3120                 return NULL;
3121         }
3122
3123         request->child_state = REQUEST_QUEUED;
3124         request->when = now;
3125         request->delay = USEC;
3126         request->priority = RAD_LISTEN_PROXY;
3127         tv_add(&request->when, request->delay);
3128
3129         /*
3130          *      Wait a bit will take care of max_request_time
3131          */
3132         INSERT_EVENT(wait_a_bit, request);
3133
3134         return request;
3135 }
3136 #endif
3137
3138 void event_new_fd(rad_listen_t *this)
3139 {
3140         char buffer[1024];
3141
3142         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3143
3144         this->print(this, buffer, sizeof(buffer));
3145
3146         if (this->status == RAD_LISTEN_STATUS_INIT) {
3147                 if (just_started) {
3148                         DEBUG("Listening on %s", buffer);
3149                 } else {
3150                         DEBUG2(" ... adding new socket %s", buffer);
3151                 }
3152                 if (!fr_event_fd_insert(el, 0, this->fd,
3153                                         event_socket_handler, this)) {
3154                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3155                         exit(1);
3156                 }
3157
3158                 this->status = RAD_LISTEN_STATUS_KNOWN;
3159                 return;
3160         }
3161
3162         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3163                 DEBUG2(" ... closing socket %s", buffer);
3164
3165                 fr_event_fd_delete(el, 0, this->fd);
3166                 this->status = RAD_LISTEN_STATUS_FINISH;
3167
3168                 /*
3169                  *      Close the fd AFTER fixing up the requests and
3170                  *      listeners, so that they don't send/recv on the
3171                  *      wrong socket (if someone manages to open
3172                  *      another one).
3173                  */
3174                 close(this->fd);
3175                 this->fd = -1;
3176         }
3177 }
3178
3179 static void handle_signal_self(int flag)
3180 {
3181         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3182                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3183                         fr_event_loop_exit(el, 1);
3184                 } else {
3185                         fr_event_loop_exit(el, 2);
3186                 }
3187
3188                 return;
3189         } /* else exit/term flags weren't set */
3190
3191         /*
3192          *      Tell the even loop to stop processing.
3193          */
3194         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3195                 time_t when;
3196                 static time_t last_hup = 0;
3197
3198                 DEBUG("Received HUP signal.");
3199
3200                 when = time(NULL);
3201                 if ((int) (when - last_hup) < 5) {
3202                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3203                         return;
3204                 }
3205                 last_hup = when;
3206
3207                 fr_event_loop_exit(el, 0x80);
3208         }
3209
3210 #ifdef WITH_DETAIL
3211         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3212                 rad_listen_t *this;
3213
3214                 /*
3215                  *      FIXME: O(N) loops suck.
3216                  */
3217                 for (this = mainconfig.listen;
3218                      this != NULL;
3219                      this = this->next) {
3220                         if (this->type != RAD_LISTEN_DETAIL) continue;
3221
3222                         /*
3223                          *      This one didn't send the signal, skip
3224                          *      it.
3225                          */
3226                         if (!this->decode(this, NULL)) continue;
3227
3228                         /*
3229                          *      Go service the interrupt.
3230                          */
3231                         event_poll_detail(this);
3232                 }
3233         }
3234 #endif
3235
3236         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3237                 rad_listen_t *this;
3238
3239                 for (this = mainconfig.listen;
3240                      this != NULL;
3241                      this = this->next) {
3242                         event_new_fd(this);
3243                 }
3244         }
3245 }
3246
3247 #ifndef WITH_SELF_PIPE
3248 void radius_signal_self(int flag)
3249 {
3250         handle_signal_self(flag);
3251 }
3252 #else
3253 /*
3254  *      Inform ourselves that we received a signal.
3255  */
3256 void radius_signal_self(int flag)
3257 {
3258         ssize_t rcode;
3259         uint8_t buffer[16];
3260
3261         /*
3262          *      The read MUST be non-blocking for this to work.
3263          */
3264         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3265         if (rcode > 0) {
3266                 ssize_t i;
3267
3268                 for (i = 0; i < rcode; i++) {
3269                         buffer[0] |= buffer[i];
3270                 }
3271         } else {
3272                 buffer[0] = 0;
3273         }
3274
3275         buffer[0] |= flag;
3276
3277         write(self_pipe[1], buffer, 1);
3278 }
3279
3280
3281 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3282                                  UNUSED int fd, UNUSED void *ctx)
3283 {
3284         ssize_t i, rcode;
3285         uint8_t buffer[32];
3286
3287         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3288         if (rcode <= 0) return;
3289
3290         /*
3291          *      Merge pending signals.
3292          */
3293         for (i = 0; i < rcode; i++) {
3294                 buffer[0] |= buffer[i];
3295         }
3296
3297         handle_signal_self(buffer[0]);
3298 }
3299 #endif
3300
3301
3302 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3303                                  void *ctx)
3304 {
3305         rad_listen_t *listener = ctx;
3306         RAD_REQUEST_FUNP fun;
3307         REQUEST *request;
3308
3309         rad_assert(xel == el);
3310
3311         xel = xel;
3312
3313         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3314
3315         if (!listener->recv(listener, &fun, &request)) return;
3316
3317         if (!thread_pool_addrequest(request, fun)) {
3318                 request->child_state = REQUEST_DONE;
3319         }
3320 }
3321
3322 typedef struct listen_detail_t {
3323         fr_event_t      *ev;
3324 } listen_detail_t;
3325
3326 /*
3327  *      This function is called periodically to see if this detail
3328  *      file is available for reading.
3329  */
3330 static void event_poll_detail(void *ctx)
3331 {
3332         int rcode, delay;
3333         RAD_REQUEST_FUNP fun;
3334         REQUEST *request;
3335         rad_listen_t *this = ctx;
3336         struct timeval when;
3337         listen_detail_t *detail = this->data;
3338
3339         rad_assert(this->type == RAD_LISTEN_DETAIL);
3340
3341         /*
3342          *      Try to read something.
3343          *
3344          *      FIXME: This does poll AND receive.
3345          */
3346         rcode = this->recv(this, &fun, &request);
3347         if (rcode != 0) {
3348                 rad_assert(fun != NULL);
3349                 rad_assert(request != NULL);
3350
3351                 if (!thread_pool_addrequest(request, fun)) {
3352                         request->child_state = REQUEST_DONE;
3353                 }
3354         }
3355
3356         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3357         when = now;
3358
3359         /*
3360          *      Backdoor API to get the delay until the next poll
3361          *      time.
3362          */
3363         delay = this->encode(this, NULL);
3364         tv_add(&when, delay);
3365
3366         if (!fr_event_insert(el, event_poll_detail, this,
3367                              &when, &detail->ev)) {
3368                 radlog(L_ERR, "Failed creating handler");
3369                 exit(1);
3370         }
3371 }
3372
3373
3374 static void event_status(struct timeval *wake)
3375 {
3376 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3377         int argval;
3378 #endif
3379
3380         if (debug_flag == 0) {
3381                 if (just_started) {
3382                         radlog(L_INFO, "Ready to process requests.");
3383                         just_started = FALSE;
3384                 }
3385                 return;
3386         }
3387
3388         if (!wake) {
3389                 DEBUG("Ready to process requests.");
3390
3391         } else if ((wake->tv_sec != 0) ||
3392                    (wake->tv_usec >= 100000)) {
3393                 DEBUG("Waking up in %d.%01u seconds.",
3394                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3395         }
3396
3397
3398         /*
3399          *      FIXME: Put this somewhere else, where it isn't called
3400          *      all of the time...
3401          */
3402
3403 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3404         /*
3405          *      If there are no child threads, then there may
3406          *      be child processes.  In that case, wait for
3407          *      their exit status, and throw that exit status
3408          *      away.  This helps get rid of zxombie children.
3409          */
3410         while (waitpid(-1, &argval, WNOHANG) > 0) {
3411                 /* do nothing */
3412         }
3413 #endif
3414
3415 }
3416
3417 /*
3418  *      Externally-visibly functions.
3419  */
3420 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3421 {
3422         rad_listen_t *this, *head = NULL;
3423
3424         if (el) return 0;
3425
3426         time(&fr_start_time);
3427
3428         el = fr_event_list_create(event_status);
3429         if (!el) return 0;
3430
3431         pl = fr_packet_list_create(0);
3432         if (!pl) return 0;      /* leak el */
3433
3434         request_num_counter = 0;
3435
3436 #ifdef WITH_PROXY
3437         if (mainconfig.proxy_requests) {
3438                 pthread_mutexattr_t attr;
3439
3440                 /*
3441                  *      Create the tree for managing proxied requests and
3442                  *      responses.
3443                  */
3444                 proxy_list = fr_packet_list_create(1);
3445                 if (!proxy_list) return 0;
3446
3447 #ifdef HAVE_PTHREAD_H
3448                 pthread_mutexattr_init(&attr);
3449
3450 #ifdef PTHREAD_MUTEX_RECURSIVE
3451                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3452                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3453                                strerror(errno));
3454                         exit(1);
3455                 }
3456 #endif
3457
3458                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3459                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3460                                strerror(errno));
3461                         exit(1);
3462                 }
3463
3464                 pthread_mutexattr_destroy(&attr);
3465 #endif
3466         }
3467 #endif
3468
3469         /*
3470          *      Just before we spawn the child threads, force the log
3471          *      subsystem to re-open the log file for every write.
3472          */
3473         if (spawn_flag) force_log_reopen();
3474
3475 #ifdef HAVE_PTHREAD_H
3476 #ifndef __MINGW32__
3477         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3478 #else
3479         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3480 #endif
3481         /*
3482          *      Initialize the threads ONLY if we're spawning, AND
3483          *      we're running normally.
3484          */
3485         if (spawn_flag && !check_config &&
3486             (thread_pool_init(cs, &spawn_flag) < 0)) {
3487                 exit(1);
3488         }
3489 #endif
3490
3491         /*
3492          *      Move all of the thread calls to this file?
3493          *
3494          *      It may be best for the mutexes to be in this file...
3495          */
3496         have_children = spawn_flag;
3497
3498         if (check_config) {
3499                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3500                        mainconfig.name);
3501                 return 1;
3502         }
3503
3504 #ifdef WITH_SELF_PIPE
3505         /*
3506          *      Child threads need a pipe to signal us, as do the
3507          *      signal handlers.
3508          */
3509         if (pipe(self_pipe) < 0) {
3510                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3511                        strerror(errno));
3512                 exit(1);
3513         }
3514         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3515                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3516                        strerror(errno));
3517                 exit(1);
3518         }
3519         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3520                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3521                        strerror(errno));
3522                 exit(1);
3523         }
3524
3525         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3526                                   event_signal_handler, el)) {
3527                 radlog(L_ERR, "Failed creating handler for signals");
3528                 exit(1);
3529         }
3530 #endif  /* WITH_SELF_PIPE */
3531
3532 #ifdef WITH_PROXY
3533         /*
3534          *      Mark the proxy Fd's as unused.
3535          */
3536         {
3537                 int i;
3538
3539                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3540         }
3541 #endif
3542
3543        DEBUG("%s: #### Opening IP addresses and Ports ####",
3544                mainconfig.name);
3545
3546        /*
3547         *       The server temporarily switches to an unprivileged
3548         *       user very early in the bootstrapping process.
3549         *       However, some sockets MAY require privileged access
3550         *       (bind to device, or to port < 1024, or to raw
3551         *       sockets).  Those sockets need to call suid up/down
3552         *       themselves around the functions that need a privileged
3553         *       uid.
3554         */
3555         if (listen_init(cs, &head) < 0) {
3556                 _exit(1);
3557         }
3558
3559         /*
3560          *      At this point, no one has any business *ever* going
3561          *      back to root uid.
3562          */
3563         fr_suid_down_permanent();
3564
3565         /*
3566          *      Add all of the sockets to the event loop.
3567          */
3568         for (this = head;
3569              this != NULL;
3570              this = this->next) {
3571                 char buffer[256];
3572
3573                 this->print(this, buffer, sizeof(buffer));
3574
3575                 switch (this->type) {
3576 #ifdef WITH_DETAIL
3577                 case RAD_LISTEN_DETAIL:
3578                         DEBUG("Listening on %s", buffer);
3579
3580                         /*
3581                          *      Detail files are always known, and aren't
3582                          *      put into the socket event loop.
3583                          */
3584                         this->status = RAD_LISTEN_STATUS_KNOWN;
3585
3586                         /*
3587                          *      Set up the first poll interval.
3588                          */
3589                         event_poll_detail(this);
3590                         break;
3591 #endif
3592
3593 #ifdef WITH_PROXY
3594                 case RAD_LISTEN_PROXY:
3595                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3596                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3597
3598                         proxy_fds[this->fd & 0x1f] = this->fd;
3599                         proxy_listeners[this->fd & 0x1f] = this;
3600                         if (!fr_packet_list_socket_add(proxy_list,
3601                                                          this->fd)) {
3602                                 rad_assert(0 == 1);
3603                         }
3604                         /* FALL-THROUGH */
3605 #endif
3606
3607                 default:
3608                         break;
3609                 }
3610
3611                 event_new_fd(this);
3612         }
3613
3614         mainconfig.listen = head;
3615
3616         return 1;
3617 }
3618
3619
3620 static int request_hash_cb(UNUSED void *ctx, void *data)
3621 {
3622         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3623
3624 #ifdef WITH_PROXY
3625         rad_assert(request->in_proxy_hash == FALSE);
3626 #endif
3627
3628         ev_request_free(&request);
3629
3630         return 0;
3631 }
3632
3633
3634 #ifdef WITH_PROXY
3635 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3636 {
3637         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3638
3639         ev_request_free(&request);
3640
3641         return 0;
3642 }
3643 #endif
3644
3645 void radius_event_free(void)
3646 {
3647         /*
3648          *      FIXME: Stop all threads, or at least check that
3649          *      they're all waiting on the semaphore, and the queues
3650          *      are empty.
3651          */
3652
3653 #ifdef WITH_PROXY
3654         /*
3655          *      There are requests in the proxy hash that aren't
3656          *      referenced from anywhere else.  Remove them first.
3657          */
3658         if (proxy_list) {
3659                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3660                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3661                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3662                 fr_packet_list_free(proxy_list);
3663                 proxy_list = NULL;
3664         }
3665 #endif
3666
3667         fr_packet_list_walk(pl, NULL, request_hash_cb);
3668
3669         fr_packet_list_free(pl);
3670         pl = NULL;
3671
3672         fr_event_list_free(el);
3673 }
3674
3675 int radius_event_process(void)
3676 {
3677         if (!el) return 0;
3678
3679         return fr_event_loop(el);
3680 }
3681
3682 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3683 {
3684         request->options = RAD_REQUEST_OPTION_DEBUG2;
3685
3686         if (request_pre_handler(request)) {
3687                 rad_assert(fun != NULL);
3688                 rad_assert(request != NULL);
3689
3690                 if (request->server) RDEBUG("server %s {",
3691                                             request->server != NULL ?
3692                                             request->server : "");
3693                 fun(request);
3694
3695                 if (request->server) RDEBUG("} # server %s",
3696                                              request->server != NULL ?
3697                                             request->server : "");
3698
3699                 request_post_handler(request);
3700         }
3701
3702         DEBUG2("Going to the next request");
3703         return;
3704 }