src/main/event.c

   1 /*
   2  * event.c      Server event handling
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2007  The FreeRADIUS server project
  21  * Copyright 2007  Alan DeKok <aland@deployingradius.com>
  22  */
  23
  24 #include <freeradius-devel/ident.h>
  25 RCSID("$Id$")
  26
  27 #include <freeradius-devel/radiusd.h>
  28 #include <freeradius-devel/modules.h>
  29 #include <freeradius-devel/event.h>
  30 #include <freeradius-devel/detail.h>
  31
  32 #include <freeradius-devel/rad_assert.h>
  33
  34 #include <signal.h>
  35 #include <fcntl.h>
  36
  37 #ifdef HAVE_SYS_WAIT_H
  38 #       include <sys/wait.h>
  39 #endif
  40
  41 #define USEC (1000000)
  42
  43 extern pid_t radius_pid;
  44 extern int dont_fork;
  45 extern int check_config;
  46 extern void force_log_reopen(void);
  47 extern char *debug_condition;
  48
  49 /*
  50  *      Ridiculous amounts of local state.
  51  */
  52 static fr_event_list_t  *el = NULL;
  53 static fr_packet_list_t *pl = NULL;
  54 static int                      request_num_counter = 0;
  55 static struct timeval           now;
  56 time_t                          fr_start_time;
  57 static int                      have_children;
  58 static int                      just_started = TRUE;
  59
  60 #ifndef __MINGW32__
  61 #ifdef HAVE_PTHREAD_H
  62 #define WITH_SELF_PIPE (1)
  63 #endif
  64 #endif
  65
  66 #ifdef WITH_SELF_PIPE
  67 static int self_pipe[2];
  68 #endif
  69
  70 #ifdef HAVE_PTHREAD_H
  71 #ifdef WITH_PROXY
  72 static pthread_mutex_t  proxy_mutex;
  73 #endif
  74
  75 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
  76 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
  77
  78 static pthread_t NO_SUCH_CHILD_PID;
  79 #else
  80 /*
  81  *      This is easier than ifdef's throughout the code.
  82  */
  83 #define PTHREAD_MUTEX_LOCK(_x)
  84 #define PTHREAD_MUTEX_UNLOCK(_x)
  85 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
  86 {
  87         radius_handle_request(request, fun);
  88         return 1;
  89 }
  90 #endif
  91
  92 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
  93
  94 #ifdef WITH_PROXY
  95 static fr_packet_list_t *proxy_list = NULL;
  96
  97 /*
  98  *      We keep the proxy FD's here.  The RADIUS Id's are marked
  99  *      "allocated" per Id, via a bit per proxy FD.
 100  */
 101 static int              proxy_fds[32];
 102 static rad_listen_t     *proxy_listeners[32];
 103 #else
 104 #define remove_from_proxy_hash(foo)
 105 #endif
 106
 107 static void request_post_handler(REQUEST *request);
 108 static void wait_a_bit(void *ctx);
 109 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
 110 #ifdef WITH_DETAIL
 111 static void event_poll_detail(void *ctx);
 112 #endif
 113
 114 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
 115                                     const char *msg)
 116 {
 117         radlog(L_ERR, "[%s:%d] %s", file, line, msg);
 118         _exit(1);
 119 }
 120
 121 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
 122
 123
 124 static void tv_add(struct timeval *tv, int usec_delay)
 125 {
 126         if (usec_delay > USEC) {
 127                 tv->tv_sec += usec_delay / USEC;
 128                 usec_delay %= USEC;
 129         }
 130         tv->tv_usec += usec_delay;
 131
 132         if (tv->tv_usec > USEC) {
 133                 tv->tv_usec -= USEC;
 134                 tv->tv_sec++;
 135         }
 136 }
 137
 138 static void remove_from_request_hash(REQUEST *request)
 139 {
 140         if (!request->in_request_hash) return;
 141
 142         fr_packet_list_yank(pl, request->packet);
 143         request->in_request_hash = FALSE;
 144
 145         request_stats_final(request);
 146 }
 147
 148
 149 #ifdef WITH_PROXY
 150 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
 151 {
 152         RADIUS_PACKET **proxy_p;
 153         REQUEST *request;
 154
 155         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 156         proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
 157
 158         if (!proxy_p) {
 159                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 160                 return NULL;
 161         }
 162
 163         request = fr_packet2myptr(REQUEST, proxy, proxy_p);
 164
 165         if (!request) {
 166                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 167                 return NULL;
 168         }
 169
 170         request->num_proxied_responses++;
 171
 172         /*
 173          *      Catch the most common case of everything working
 174          *      correctly.
 175          */
 176         if (request->num_proxied_requests == request->num_proxied_responses) {
 177                 fr_packet_list_yank(proxy_list, request->proxy);
 178                 fr_packet_list_id_free(proxy_list, request->proxy);
 179                 request->in_proxy_hash = FALSE;
 180         }
 181
 182         /*
 183          *      On the FIRST reply, decrement the count of outstanding
 184          *      requests.  Note that this is NOT the count of sent
 185          *      packets, but whether or not the home server has
 186          *      responded at all.
 187          */
 188         if (!request->proxy_reply &&
 189             request->home_server &&
 190             request->home_server->currently_outstanding) {
 191                 request->home_server->currently_outstanding--;
 192         }
 193
 194         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 195
 196         return request;
 197 }
 198
 199
 200 static void remove_from_proxy_hash(REQUEST *request)
 201 {
 202         /*
 203          *      Check this without grabbing the mutex because it's a
 204          *      lot faster that way.
 205          */
 206         if (!request->in_proxy_hash) return;
 207
 208         /*
 209          *      The "not in hash" flag is definitive.  However, if the
 210          *      flag says that it IS in the hash, there might still be
 211          *      a race condition where it isn't.
 212          */
 213         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 214
 215         if (!request->in_proxy_hash) {
 216                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 217                 return;
 218         }
 219
 220         fr_packet_list_yank(proxy_list, request->proxy);
 221         fr_packet_list_id_free(proxy_list, request->proxy);
 222
 223         /*
 224          *      The home server hasn't replied, but we've given up on
 225          *      this request.  Don't count this request against the
 226          *      home server.
 227          */
 228         if (!request->proxy_reply &&
 229             request->home_server &&
 230             request->home_server->currently_outstanding) {
 231                 request->home_server->currently_outstanding--;
 232         }
 233
 234         /*
 235          *      Got from YES in hash, to NO, not in hash while we hold
 236          *      the mutex.  This guarantees that when another thread
 237          *      grans the mutex, the "not in hash" flag is correct.
 238          */
 239         request->in_proxy_hash = FALSE;
 240
 241         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 242 }
 243
 244 static void ev_request_free(REQUEST **prequest)
 245 {
 246         REQUEST *request;
 247
 248         if (!prequest || !*prequest) return;
 249
 250         request = *prequest;
 251
 252 #ifdef WITH_COA
 253         if (request->coa) {
 254                 /*
 255                  *      Divorce the child from the parent first,
 256                  *      then clean up the child.
 257                  */
 258                 request->coa->parent = NULL;
 259                 ev_request_free(&request->coa);
 260         }
 261
 262         /*
 263          *      Divorce the parent from the child, and leave the
 264          *      parent still alive.
 265          */
 266         if (request->parent && (request->parent->coa == request)) {
 267                 request->parent->coa = NULL;
 268         }
 269 #endif
 270
 271         if (request->ev) fr_event_delete(el, &request->ev);
 272         if (request->in_proxy_hash) remove_from_proxy_hash(request);
 273         if (request->in_request_hash) remove_from_request_hash(request);
 274
 275         request_free(prequest);
 276 }
 277
 278 static int proxy_id_alloc(REQUEST *request, RADIUS_PACKET *packet)
 279 {
 280         int i, proxy, found;
 281         rad_listen_t *proxy_listener;
 282
 283         if (fr_packet_list_id_alloc(proxy_list, packet)) return 1;
 284
 285         /*
 286          *      Allocate a new proxy fd.  This function adds
 287          *      it to the tail of the list of listeners.  With
 288          *      some care, this can be thread-safe.
 289          */
 290         proxy_listener = proxy_new_listener(&packet->src_ipaddr, FALSE);
 291         if (!proxy_listener) {
 292                 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 293                 return 0;
 294         }
 295
 296         /*
 297          *      Cache it locally.
 298          */
 299         found = -1;
 300         proxy = proxy_listener->fd;
 301         for (i = 0; i < 32; i++) {
 302                 /*
 303                  *      Found a free entry.  Save the socket,
 304                  *      and remember where we saved it.
 305                  */
 306                 if (proxy_fds[(proxy + i) & 0x1f] == -1) {
 307                         found = (proxy + i) & 0x1f;
 308                         proxy_fds[found] = proxy;
 309                         proxy_listeners[found] = proxy_listener;
 310                         break;
 311                 }
 312         }
 313         rad_assert(found >= 0);
 314
 315         if (!fr_packet_list_socket_add(proxy_list, proxy_listener->fd)) {
 316                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 317                 return 0;
 318
 319         }
 320
 321         if (!fr_packet_list_id_alloc(proxy_list, packet)) {
 322                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 323                 return 0;
 324         }
 325
 326         /*
 327          *      Signal the main thread to add the new FD to the list
 328          *      of listening FD's.
 329          */
 330         radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
 331         return 1;
 332 }
 333
 334
 335 static int insert_into_proxy_hash(REQUEST *request, int retransmit)
 336 {
 337         int i, proxy;
 338         char buf[128];
 339
 340         rad_assert(request->proxy != NULL);
 341         rad_assert(proxy_list != NULL);
 342
 343         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 344
 345         /*
 346          *      Keep track of maximum outstanding requests to a
 347          *      particular home server.  'max_outstanding' is
 348          *      enforced in home_server_ldb(), in realms.c.
 349          */
 350         if (request->home_server) {
 351                 request->home_server->currently_outstanding++;
 352                 request->home_server->stats.total_requests++;
 353         }
 354
 355         if (retransmit) {
 356                 RADIUS_PACKET packet;
 357
 358                 packet = *request->proxy;
 359
 360                 if (!proxy_id_alloc(request, &packet)) {
 361                         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 362                         return 0;
 363                 }
 364
 365                 /*
 366                  *      Yank the request, free the old Id, and
 367                  *      remember the new Id.
 368                  */
 369                 fr_packet_list_yank(proxy_list, request->proxy);
 370                 fr_packet_list_id_free(proxy_list, request->proxy);
 371                 *request->proxy = packet;
 372
 373         } else if (!proxy_id_alloc(request, request->proxy)) {
 374                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 375                 return 0;
 376         }
 377
 378         rad_assert(request->proxy->sockfd >= 0);
 379
 380         /*
 381          *      FIXME: Hack until we get rid of rad_listen_t, and put
 382          *      the information into the packet_list.
 383          */
 384         proxy = -1;
 385         for (i = 0; i < 32; i++) {
 386                 if (proxy_fds[i] == request->proxy->sockfd) {
 387                         proxy = i;
 388                         break;
 389                 }
 390         }
 391
 392         if (proxy < 0) {
 393                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 394                 RDEBUG2("ERROR: All sockets are full.");
 395                 return 0;
 396         }
 397
 398         rad_assert(proxy_fds[proxy] != -1);
 399         rad_assert(proxy_listeners[proxy] != NULL);
 400         request->proxy_listener = proxy_listeners[proxy];
 401
 402         if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
 403                 fr_packet_list_id_free(proxy_list, request->proxy);
 404                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 405                 RDEBUG2("ERROR: Failed to insert entry into proxy list");
 406                 return 0;
 407         }
 408
 409         request->in_proxy_hash = TRUE;
 410
 411         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 412
 413         RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
 414                inet_ntop(request->proxy->dst_ipaddr.af,
 415                          &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
 416                request->proxy->dst_port,
 417                request->proxy->id);
 418
 419         return 1;
 420 }
 421
 422
 423 /*
 424  *      Called as BOTH an event, and in-line from other functions.
 425  */
 426 static void wait_for_proxy_id_to_expire(void *ctx)
 427 {
 428         REQUEST *request = ctx;
 429
 430         rad_assert(request->magic == REQUEST_MAGIC);
 431         rad_assert(request->proxy != NULL);
 432
 433         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
 434         request->when = request->proxy_when;
 435
 436 #ifdef WITH_COA
 437         if (((request->proxy->code == PW_COA_REQUEST) ||
 438              (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
 439             (request->packet->code != request->proxy->code)) {
 440                 request->when.tv_sec += request->home_server->coa_mrd;
 441         } else
 442 #endif
 443         request->when.tv_sec += request->home_server->response_window;
 444
 445         if ((request->num_proxied_requests == request->num_proxied_responses) ||
 446             timercmp(&now, &request->when, >)) {
 447                 if (request->packet) {
 448                         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 449                                request->number, request->packet->id,
 450                                (unsigned int) (request->timestamp - fr_start_time));
 451                 } else {
 452                         RDEBUG2("Cleaning up request %d with timestamp +%d",
 453                                request->number,
 454                                (unsigned int) (request->timestamp - fr_start_time));
 455                 }
 456
 457                 ev_request_free(&request);
 458                 return;
 459         }
 460
 461         INSERT_EVENT(wait_for_proxy_id_to_expire, request);
 462 }
 463 #endif
 464
 465 #ifdef HAVE_PTHREAD_H
 466 static void wait_for_child_to_die(void *ctx)
 467 {
 468         REQUEST *request = ctx;
 469
 470         rad_assert(request->magic == REQUEST_MAGIC);
 471
 472         if ((request->child_state == REQUEST_QUEUED) |
 473             (request->child_state == REQUEST_RUNNING)) {
 474                 request->delay += (request->delay >> 1);
 475                 tv_add(&request->when, request->delay);
 476
 477                 RDEBUG2("Child is still stuck for request %d", request->number);
 478
 479                 INSERT_EVENT(wait_for_child_to_die, request);
 480                 return;
 481         }
 482
 483         RDEBUG2("Child is finally responsive for request %d", request->number);
 484         remove_from_request_hash(request);
 485
 486 #ifdef WITH_PROXY
 487         if (request->proxy) {
 488                 wait_for_proxy_id_to_expire(request);
 489                 return;
 490         }
 491 #endif
 492
 493         ev_request_free(&request);
 494 }
 495 #endif
 496
 497 static void cleanup_delay(void *ctx)
 498 {
 499         REQUEST *request = ctx;
 500
 501         rad_assert(request->magic == REQUEST_MAGIC);
 502         rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
 503                    (request->child_state == REQUEST_DONE));
 504
 505         remove_from_request_hash(request);
 506
 507 #ifdef WITH_PROXY
 508         if (request->proxy && request->in_proxy_hash) {
 509                 wait_for_proxy_id_to_expire(request);
 510                 return;
 511         }
 512 #endif
 513
 514         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 515                request->number, request->packet->id,
 516                (unsigned int) (request->timestamp - fr_start_time));
 517
 518         ev_request_free(&request);
 519 }
 520
 521
 522 /*
 523  *      FIXME: Put into a libradius function.
 524  */
 525 #define MAX_PACKET_CODE (52)
 526 static const char *packet_codes[] = {
 527   "",
 528   "Access-Request",
 529   "Access-Accept",
 530   "Access-Reject",
 531   "Accounting-Request",
 532   "Accounting-Response",
 533   "Accounting-Status",
 534   "Password-Request",
 535   "Password-Accept",
 536   "Password-Reject",
 537   "Accounting-Message",
 538   "Access-Challenge",
 539   "Status-Server",
 540   "Status-Client",
 541   "14",
 542   "15",
 543   "16",
 544   "17",
 545   "18",
 546   "19",
 547   "20",
 548   "Resource-Free-Request",
 549   "Resource-Free-Response",
 550   "Resource-Query-Request",
 551   "Resource-Query-Response",
 552   "Alternate-Resource-Reclaim-Request",
 553   "NAS-Reboot-Request",
 554   "NAS-Reboot-Response",
 555   "28",
 556   "Next-Passcode",
 557   "New-Pin",
 558   "Terminate-Session",
 559   "Password-Expired",
 560   "Event-Request",
 561   "Event-Response",
 562   "35",
 563   "36",
 564   "37",
 565   "38",
 566   "39",
 567   "Disconnect-Request",
 568   "Disconnect-ACK",
 569   "Disconnect-NAK",
 570   "CoA-Request",
 571   "CoA-ACK",
 572   "CoA-NAK",
 573   "46",
 574   "47",
 575   "48",
 576   "49",
 577   "IP-Address-Allocate",
 578   "IP-Address-Release"
 579 };
 580
 581
 582 /*
 583  *      In daemon mode, AND this request has debug flags set.
 584  */
 585 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
 586
 587 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
 588 {
 589         VALUE_PAIR *vp;
 590         char buffer[1024];
 591         const char *received, *from;
 592         const fr_ipaddr_t *ip;
 593         int port;
 594
 595         if (!packet) return;
 596
 597         rad_assert(debug_flag != 0);
 598         rad_assert(request->radlog != NULL);
 599
 600         if (direction == 0) {
 601                 received = "Received";
 602                 from = "from";  /* what else? */
 603                 ip = &packet->src_ipaddr;
 604                 port = packet->src_port;
 605
 606         } else {
 607                 received = "Sending";
 608                 from = "to";    /* hah! */
 609                 ip = &packet->dst_ipaddr;
 610                 port = packet->dst_port;
 611         }
 612
 613         /*
 614          *      Client-specific debugging re-prints the input
 615          *      packet into the client log.
 616          *
 617          *      This really belongs in a utility library
 618          */
 619         if ((packet->code > 0) && (packet->code < MAX_PACKET_CODE)) {
 620                 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
 621                        received, packet_codes[packet->code], from,
 622                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 623                        port, packet->id, packet->data_len);
 624         } else {
 625                 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
 626                        received, from,
 627                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 628                        port,
 629                        packet->code, packet->id, packet->data_len);
 630         }
 631
 632         for (vp = packet->vps; vp != NULL; vp = vp->next) {
 633                 vp_prints(buffer, sizeof(buffer), vp);
 634                 request->radlog(L_DBG, 0, request, "\t%s", buffer);
 635         }
 636 }
 637
 638 static void reject_delay(void *ctx)
 639 {
 640         REQUEST *request = ctx;
 641
 642         rad_assert(request->magic == REQUEST_MAGIC);
 643         rad_assert(request->child_state == REQUEST_REJECT_DELAY);
 644
 645         RDEBUG2("Sending delayed reject for request %d", request->number);
 646
 647         DEBUG_PACKET(request, request->reply, 1);
 648
 649         request->listener->send(request->listener, request);
 650
 651         request->when.tv_sec += request->root->cleanup_delay;
 652         request->child_state = REQUEST_CLEANUP_DELAY;
 653
 654         INSERT_EVENT(cleanup_delay, request);
 655 }
 656
 657
 658 #ifdef WITH_PROXY
 659 void revive_home_server(void *ctx)
 660 {
 661         home_server *home = ctx;
 662         char buffer[128];
 663
 664         home->state = HOME_STATE_ALIVE;
 665         home->currently_outstanding = 0;
 666         home->revive_time = now;
 667
 668         /*
 669          *      Delete any outstanding events.
 670          */
 671         if (home->ev) fr_event_delete(el, &home->ev);
 672
 673         radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
 674                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 675                          buffer, sizeof(buffer)),
 676                home->port);
 677
 678 }
 679
 680
 681 static void no_response_to_ping(void *ctx)
 682 {
 683         REQUEST *request = ctx;
 684         home_server *home;
 685         char buffer[128];
 686
 687         rad_assert(request->home_server != NULL);
 688
 689         home = request->home_server;
 690         home->num_received_pings = 0;
 691
 692         RDEBUG2("No response to status check %d from home server %s port %d",
 693                request->number,
 694                inet_ntop(request->proxy->dst_ipaddr.af,
 695                          &request->proxy->dst_ipaddr.ipaddr,
 696                          buffer, sizeof(buffer)),
 697                request->proxy->dst_port);
 698
 699         wait_for_proxy_id_to_expire(request);
 700 }
 701
 702
 703 static void received_response_to_ping(REQUEST *request)
 704 {
 705         home_server *home;
 706         char buffer[128];
 707
 708         rad_assert(request->home_server != NULL);
 709
 710         home = request->home_server;
 711         home->num_received_pings++;
 712
 713         RDEBUG2("Received response to status check %d (%d in current sequence)",
 714                request->number, home->num_received_pings);
 715
 716         /*
 717          *      Remove the request from any hashes
 718          */
 719         fr_event_delete(el, &request->ev);
 720         remove_from_proxy_hash(request);
 721         rad_assert(request->in_request_hash == FALSE);
 722
 723         /*
 724          *      The control socket may have marked the home server as
 725          *      alive.  OR, it may have suddenly started responding to
 726          *      requests again.  If so, don't re-do the "make alive"
 727          *      work.
 728          */
 729         if (home->state == HOME_STATE_ALIVE) return;
 730
 731         /*
 732          *      We haven't received enough ping responses to mark it
 733          *      "alive".  Wait a bit.
 734          */
 735         if (home->num_received_pings < home->num_pings_to_alive) {
 736                 return;
 737         }
 738
 739         home->state = HOME_STATE_ALIVE;
 740         home->currently_outstanding = 0;
 741         home->revive_time = now;
 742
 743         if (!fr_event_delete(el, &home->ev)) {
 744                 RDEBUG2("Hmm... no event for home server.  Oh well.");
 745         }
 746
 747         radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
 748                inet_ntop(request->proxy->dst_ipaddr.af,
 749                          &request->proxy->dst_ipaddr.ipaddr,
 750                          buffer, sizeof(buffer)),
 751                request->proxy->dst_port);
 752 }
 753
 754
 755 /*
 756  *      Called from start of zombie period, OR after control socket
 757  *      marks the home server dead.
 758  */
 759 static void ping_home_server(void *ctx)
 760 {
 761         uint32_t jitter;
 762         home_server *home = ctx;
 763         REQUEST *request;
 764         VALUE_PAIR *vp;
 765
 766         if ((home->state == HOME_STATE_ALIVE) ||
 767             (home->ping_check == HOME_PING_CHECK_NONE)) {
 768                 return;
 769         }
 770
 771         request = request_alloc();
 772         request->number = request_num_counter++;
 773
 774         request->proxy = rad_alloc(1);
 775         rad_assert(request->proxy != NULL);
 776
 777         fr_event_now(el, &request->when);
 778         home->when = request->when;
 779
 780         if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
 781                 request->proxy->code = PW_STATUS_SERVER;
 782
 783                 radius_pairmake(request, &request->proxy->vps,
 784                                 "Message-Authenticator", "0x00", T_OP_SET);
 785
 786         } else if (home->type == HOME_TYPE_AUTH) {
 787                 request->proxy->code = PW_AUTHENTICATION_REQUEST;
 788
 789                 radius_pairmake(request, &request->proxy->vps,
 790                                 "User-Name", home->ping_user_name, T_OP_SET);
 791                 radius_pairmake(request, &request->proxy->vps,
 792                                 "User-Password", home->ping_user_password, T_OP_SET);
 793                 radius_pairmake(request, &request->proxy->vps,
 794                                 "Service-Type", "Authenticate-Only", T_OP_SET);
 795                 radius_pairmake(request, &request->proxy->vps,
 796                                 "Message-Authenticator", "0x00", T_OP_SET);
 797
 798         } else {
 799 #ifdef WITH_ACCOUNTING
 800                 request->proxy->code = PW_ACCOUNTING_REQUEST;
 801
 802                 radius_pairmake(request, &request->proxy->vps,
 803                                 "User-Name", home->ping_user_name, T_OP_SET);
 804                 radius_pairmake(request, &request->proxy->vps,
 805                                 "Acct-Status-Type", "Stop", T_OP_SET);
 806                 radius_pairmake(request, &request->proxy->vps,
 807                                 "Acct-Session-Id", "00000000", T_OP_SET);
 808                 vp = radius_pairmake(request, &request->proxy->vps,
 809                                      "Event-Timestamp", "0", T_OP_SET);
 810                 vp->vp_date = now.tv_sec;
 811 #else
 812                 rad_assert("Internal sanity check failed");
 813 #endif
 814         }
 815
 816         radius_pairmake(request, &request->proxy->vps,
 817                         "NAS-Identifier", "Status Check. Are you alive?",
 818                         T_OP_SET);
 819
 820         request->proxy->dst_ipaddr = home->ipaddr;
 821         request->proxy->dst_port = home->port;
 822         request->home_server = home;
 823
 824         rad_assert(request->proxy_listener == NULL);
 825
 826         if (!insert_into_proxy_hash(request, FALSE)) {
 827                 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash.  Discarding it.",
 828                        request->number);
 829                 ev_request_free(&request);
 830                 return;
 831         }
 832         rad_assert(request->proxy_listener != NULL);
 833         request->proxy_listener->send(request->proxy_listener,
 834                                       request);
 835
 836         request->next_callback = NULL;
 837         request->child_state = REQUEST_PROXIED;
 838         request->when.tv_sec += home->ping_timeout;;
 839
 840         INSERT_EVENT(no_response_to_ping, request);
 841
 842         /*
 843          *      Add +/- 2s of jitter, as suggested in RFC 3539
 844          *      and in the Issues and Fixes draft.
 845          */
 846         home->when.tv_sec += home->ping_interval - 2;
 847
 848         jitter = fr_rand();
 849         jitter ^= (jitter >> 10);
 850         jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
 851
 852         tv_add(&home->when, jitter);
 853
 854         INSERT_EVENT(ping_home_server, home);
 855 }
 856
 857
 858 void mark_home_server_dead(home_server *home, struct timeval *when)
 859 {
 860         int previous_state = home->state;
 861         char buffer[128];
 862
 863         radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
 864                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 865                          buffer, sizeof(buffer)),
 866                home->port);
 867
 868         home->state = HOME_STATE_IS_DEAD;
 869         home->num_received_pings = 0;
 870
 871         if (home->ping_check != HOME_PING_CHECK_NONE) {
 872                 /*
 873                  *      If the control socket marks us dead, start
 874                  *      pinging.  Otherwise, we already started
 875                  *      pinging when it was marked "zombie".
 876                  */
 877                 if (previous_state == HOME_STATE_ALIVE) {
 878                         ping_home_server(home);
 879                 }
 880
 881         } else {
 882                 /*
 883                  *      Revive it after a fixed period of time.  This
 884                  *      is very, very, bad.
 885                  */
 886                 home->when = *when;
 887                 home->when.tv_sec += home->revive_interval;
 888
 889                 INSERT_EVENT(revive_home_server, home);
 890         }
 891 }
 892
 893 static void check_for_zombie_home_server(REQUEST *request)
 894 {
 895         home_server *home;
 896         struct timeval when;
 897
 898         home = request->home_server;
 899
 900         if (home->state != HOME_STATE_ZOMBIE) return;
 901
 902         when = home->zombie_period_start;
 903         when.tv_sec += home->zombie_period;
 904
 905         fr_event_now(el, &now);
 906         if (timercmp(&now, &when, <)) {
 907                 return;
 908         }
 909
 910         mark_home_server_dead(home, &request->when);
 911 }
 912
 913 static int proxy_to_virtual_server(REQUEST *request);
 914
 915 static int virtual_server_handler(UNUSED REQUEST *request)
 916 {
 917         proxy_to_virtual_server(request);
 918         return 0;
 919 }
 920
 921 static void proxy_fallback_handler(REQUEST *request)
 922 {
 923         /*
 924          *      A proper time is required for wait_a_bit.
 925          */
 926         request->delay = USEC / 10;
 927         gettimeofday(&now, NULL);
 928         request->next_when = now;
 929         tv_add(&request->next_when, request->delay);
 930         request->next_callback = wait_a_bit;
 931
 932         /*
 933          *      Re-queue the request.
 934          */
 935         request->child_state = REQUEST_QUEUED;
 936
 937         rad_assert(request->proxy != NULL);
 938         if (!thread_pool_addrequest(request, virtual_server_handler)) {
 939                 request->child_state = REQUEST_DONE;
 940         }
 941
 942 #ifdef HAVE_PTHREAD_H
 943         /*
 944          *      MAY free the request if we're over max_request_time,
 945          *      AND we're not in threaded mode!
 946          *
 947          *      Note that we call this ONLY if we're threaded, as
 948          *      if we're NOT threaded, request_post_handler() calls
 949          *      wait_a_bit(), which means that "request" may not
 950          *      exist any more...
 951          */
 952         if (have_children) wait_a_bit(request);
 953 #endif
 954 }
 955
 956
 957 static int setup_post_proxy_fail(REQUEST *request)
 958 {
 959         DICT_VALUE *dval = NULL;
 960         VALUE_PAIR *vp;
 961
 962         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 963                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 964
 965         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 966                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 967
 968 #ifdef WITH_COA
 969                 /*
 970                  *      See no_response_to_coa_request
 971                  */
 972         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 973                 request->packet->code &= 0xff; /* restore it */
 974
 975                 if (request->proxy->code == PW_COA_REQUEST) {
 976                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 977
 978                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 979                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 980                 } else {
 981                         return 0;
 982                 }
 983
 984 #endif
 985         } else {
 986                 return 0;
 987         }
 988
 989         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 990
 991         if (!dval) {
 992                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 993                 return 0;
 994         }
 995
 996         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 997         if (!vp) vp = radius_paircreate(request, &request->config_items,
 998                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
 999         vp->vp_integer = dval->value;
1000
1001         rad_assert(request->proxy_reply == NULL);
1002
1003         return 1;
1004 }
1005
1006
1007 static int null_handler(UNUSED REQUEST *request)
1008 {
1009         return 0;
1010 }
1011
1012 static void post_proxy_fail_handler(REQUEST *request)
1013 {
1014         /*
1015          *      A proper time is required for wait_a_bit.
1016          */
1017         request->delay = USEC / 10;
1018         gettimeofday(&now, NULL);
1019
1020         /*
1021          *      Not set up to run Post-Proxy-Type = Fail.
1022          *
1023          *      Mark the request as still running, and figure out what
1024          *      to do next.
1025          */
1026         if (!setup_post_proxy_fail(request)) {
1027                 request->child_state = REQUEST_RUNNING;
1028                 request_post_handler(request);
1029
1030         } else {
1031                 /*
1032                  *      Re-queue the request.
1033                  */
1034                 request->child_state = REQUEST_QUEUED;
1035
1036                 /*
1037                  *      There is a post-proxy-type of fail.  We run
1038                  *      the request through the pre/post proxy
1039                  *      handlers, just like it was a real proxied
1040                  *      request.  However, we set the per-request
1041                  *      handler to NULL, as we don't want to do
1042                  *      anything else.
1043                  *
1044                  *      Note that when we're not threaded, this will
1045                  *      process the request even if it's greater than
1046                  *      max_request_time.  That's not fatal.
1047                  */
1048                 request->priority = 0;
1049                 rad_assert(request->proxy != NULL);
1050                 thread_pool_addrequest(request, null_handler);
1051         }
1052
1053         /*
1054          *      MAY free the request if we're over max_request_time,
1055          *      AND we're not in threaded mode!
1056          *
1057          *      Note that we call this ONLY if we're threaded, as
1058          *      if we're NOT threaded, request_post_handler() calls
1059          *      wait_a_bit(), which means that "request" may not
1060          *      exist any more...
1061          */
1062         if (have_children) wait_a_bit(request);
1063 }
1064
1065
1066 /* maybe check this against wait_for_proxy_id_to_expire? */
1067 static void no_response_to_proxied_request(void *ctx)
1068 {
1069         REQUEST *request = ctx;
1070         home_server *home;
1071         char buffer[128];
1072
1073         rad_assert(request->magic == REQUEST_MAGIC);
1074         rad_assert(request->child_state == REQUEST_PROXIED);
1075
1076         /*
1077          *      If we've failed over to an internal home server,
1078          *      replace the callback with the correct one.  This
1079          *      is due to locking issues with child threads...
1080          */
1081         if (request->home_server->server) {
1082                 wait_a_bit(request);
1083                 return;
1084         }
1085
1086         radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1087                request->number,
1088                inet_ntop(request->proxy->dst_ipaddr.af,
1089                          &request->proxy->dst_ipaddr.ipaddr,
1090                          buffer, sizeof(buffer)),
1091                request->proxy->dst_port);
1092
1093         check_for_zombie_home_server(request);
1094
1095         home = request->home_server;
1096
1097         post_proxy_fail_handler(request);
1098
1099         /*
1100          *      Don't touch request due to race conditions
1101          */
1102         if (home->state == HOME_STATE_IS_DEAD) {
1103                 rad_assert(home->ev != NULL); /* or it will never wake up */
1104                 return;
1105         }
1106
1107         /*
1108          *      Enable the zombie period when we notice that the home
1109          *      server hasn't responded.  We do NOT back-date the start
1110          *      of the zombie period.
1111          */
1112         if (home->state == HOME_STATE_ALIVE) {
1113                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1114                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1115                                  buffer, sizeof(buffer)),
1116                        home->port);
1117                 home->state = HOME_STATE_ZOMBIE;
1118                 home->zombie_period_start = now;
1119
1120                 /*
1121                  *      Start pinging the home server.
1122                  */
1123                 ping_home_server(home);
1124         }
1125 }
1126 #endif
1127
1128 static void wait_a_bit(void *ctx)
1129 {
1130         struct timeval when;
1131         REQUEST *request = ctx;
1132         fr_event_callback_t callback = NULL;
1133
1134         rad_assert(request->magic == REQUEST_MAGIC);
1135
1136 #ifdef WITH_COA
1137         /*
1138          *      The CoA request is a new (internally generated)
1139          *      request, created in a child thread.  We therefore need
1140          *      some way to tie its events back into the main event
1141          *      handler.
1142          */
1143         if (request->coa && !request->coa->proxy_reply &&
1144             request->coa->next_callback) {
1145                 request->coa->when = request->coa->next_when;
1146                 INSERT_EVENT(request->coa->next_callback, request->coa);
1147                 request->coa->next_callback = NULL;
1148                 request->coa->parent = NULL;
1149                 request->coa = NULL;
1150         }
1151 #endif
1152
1153         switch (request->child_state) {
1154         case REQUEST_QUEUED:
1155         case REQUEST_RUNNING:
1156                 when = request->received;
1157                 when.tv_sec += request->root->max_request_time;
1158
1159                 /*
1160                  *      Normally called from the event loop with the
1161                  *      proper event loop time.  Otherwise, called from
1162                  *      post proxy fail handler, which sets "now", and
1163                  *      this call won't re-set it, because we're not
1164                  *      in the event loop.
1165                  */
1166                 fr_event_now(el, &now);
1167
1168                 /*
1169                  *      Request still has more time.  Continue
1170                  *      waiting.
1171                  */
1172                 if (timercmp(&now, &when, <) ||
1173                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1174                      (request->child_state == REQUEST_QUEUED))) {
1175                         if (request->delay < (USEC / 10)) {
1176                                 request->delay = USEC / 10;
1177                         }
1178                         request->delay += request->delay >> 1;
1179
1180 #ifdef WITH_DETAIL
1181                         /*
1182                          *      Cap wait at some sane value for detail
1183                          *      files.
1184                          */
1185                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1186                             (request->delay > (request->root->max_request_time * USEC))) {
1187                                 request->delay = request->root->max_request_time * USEC;
1188                         }
1189 #endif
1190
1191                         request->when = now;
1192                         tv_add(&request->when, request->delay);
1193                         callback = wait_a_bit;
1194                         break;
1195                 }
1196
1197 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1198                 /*
1199                  *      A child thread MAY still be running on the
1200                  *      request.  Ask the thread to stop working on
1201                  *      the request.
1202                  */
1203                 if (have_children) {
1204                         /* FIXME: kill unresponsive children? */
1205
1206                         /*
1207                          *      Print this error message ONLY if
1208                          *      there's a child currently processing
1209                          *      the request.  As we don't have thread
1210                          *      locks here, there may be race
1211                          *      conditions on this check.  But it's
1212                          *      just an error message, so that's OK.
1213                          */
1214                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1215                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1216                                        request->number,
1217                                        request->module ? request->module : "<server core>",
1218                                        request->component ? request->component : "<server core>");
1219                         }
1220
1221                         request->master_state = REQUEST_STOP_PROCESSING;
1222
1223                         request->delay = USEC / 4;
1224                         tv_add(&request->when, request->delay);
1225                         callback = wait_for_child_to_die;
1226                         break;
1227                 }
1228 #endif
1229
1230                 /*
1231                  *      Else there are no child threads.  We probably
1232                  *      should have just marked the request as 'done'
1233                  *      elsewhere, like in the post-proxy-fail
1234                  *      handler.  But doing that would involve
1235                  *      checking for max_request_time in multiple
1236                  *      places, so this may be simplest.
1237                  */
1238                 request->child_state = REQUEST_DONE;
1239                 /* FALL-THROUGH */
1240
1241                 /*
1242                  *      Mark the request as no longer running,
1243                  *      and clean it up.
1244                  */
1245         case REQUEST_DONE:
1246 #ifdef HAVE_PTHREAD_H
1247                 request->child_pid = NO_SUCH_CHILD_PID;
1248 #endif
1249
1250 #ifdef WTH_COA
1251                 /*
1252                  *      This is a CoA request.  It's been divorced
1253                  *      from everything else, so we clean it up now.
1254                  */
1255                 if (!request->in_request_hash &&
1256                     request->proxy &&
1257                     (request->packet->code != request->proxy->code) &&
1258                     ((request->proxy->code == PW_COA_REQUEST) ||
1259                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1260                         /*
1261                          *      FIXME: Do CoA MIBs
1262                          */
1263                         ev_request_free(&request);
1264                         return;
1265                 }
1266 #endif
1267                 request_stats_final(request);
1268                 cleanup_delay(request);
1269                 return;
1270
1271         case REQUEST_REJECT_DELAY:
1272         case REQUEST_CLEANUP_DELAY:
1273 #ifdef HAVE_PTHREAD_H
1274                 request->child_pid = NO_SUCH_CHILD_PID;
1275 #endif
1276                 request_stats_final(request);
1277
1278         case REQUEST_PROXIED:
1279                 rad_assert(request->next_callback != NULL);
1280                 rad_assert(request->next_callback != wait_a_bit);
1281
1282                 request->when = request->next_when;
1283                 callback = request->next_callback;
1284                 request->next_callback = NULL;
1285                 break;
1286
1287         default:
1288                 rad_panic("Internal sanity check failure");
1289                 return;
1290         }
1291
1292         /*
1293          *      Something major went wrong.  Discard the request, and
1294          *      keep running.
1295          *
1296          *      FIXME: No idea why this happens or how to fix it...
1297          *      It seems to happen *only* when requests are proxied,
1298          *      and where the home server doesn't respond.  So it looks
1299          *      like a race condition above, but it happens in debug
1300          *      mode, with no threads...
1301          */
1302         if (!callback) {
1303                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1304                 ev_request_free(&request);
1305                 return;
1306         }
1307
1308         INSERT_EVENT(callback, request);
1309 }
1310
1311 #ifdef WITH_COA
1312 static void no_response_to_coa_request(void *ctx)
1313 {
1314         REQUEST *request = ctx;
1315         char buffer[128];
1316
1317         rad_assert(request->magic == REQUEST_MAGIC);
1318         rad_assert(request->child_state == REQUEST_PROXIED);
1319         rad_assert(request->home_server != NULL);
1320         rad_assert(!request->in_request_hash);
1321
1322         radlog(L_ERR, "No response to CoA request sent to %s",
1323                inet_ntop(request->proxy->dst_ipaddr.af,
1324                          &request->proxy->dst_ipaddr.ipaddr,
1325                          buffer, sizeof(buffer)));
1326
1327         /*
1328          *      Hack.
1329          */
1330         request->packet->code |= (PW_COA_REQUEST << 8);
1331         post_proxy_fail_handler(request);
1332 }
1333
1334
1335 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1336 {
1337         VALUE_PAIR *vp;
1338
1339         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1340         if (!vp) return 0;
1341
1342         vp->vp_date = when;
1343
1344         if (packet->data) {
1345                 free(packet->data);
1346                 packet->data = NULL;
1347                 packet->data_len = 0;
1348         }
1349
1350         return 1;               /* time stamp updated */
1351 }
1352
1353
1354 /*
1355  *      Called when we haven't received a response to a CoA request.
1356  */
1357 static void retransmit_coa_request(void *ctx)
1358 {
1359         int delay, frac;
1360         struct timeval mrd;
1361         REQUEST *request = ctx;
1362
1363         rad_assert(request->magic == REQUEST_MAGIC);
1364         rad_assert(request->child_state == REQUEST_PROXIED);
1365         rad_assert(request->home_server != NULL);
1366         rad_assert(!request->in_request_hash);
1367         rad_assert(request->parent == NULL);
1368
1369         fr_event_now(el, &now);
1370
1371         /*
1372          *      Cap count at MRC, if it is non-zero.
1373          */
1374         if (request->home_server->coa_mrc &&
1375             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1376                 no_response_to_coa_request(request);
1377                 return;
1378         }
1379
1380         /*
1381          *      RFC 5080 Section 2.2.1
1382          *
1383          *      RT = 2*RTprev + RAND*RTprev
1384          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1385          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1386          */
1387         delay = fr_rand();
1388         delay ^= (delay >> 16);
1389         delay &= 0xffff;
1390         frac = request->delay / 5;
1391         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1392
1393         delay += (2 * request->delay) - (request->delay / 10);
1394
1395         /*
1396          *      Cap delay at MRT, if MRT is non-zero.
1397          */
1398         if (request->home_server->coa_mrt &&
1399             (delay > (request->home_server->coa_mrt * USEC))) {
1400                 int mrt_usec = request->home_server->coa_mrt * USEC;
1401
1402                 /*
1403                  *      delay = MRT + RAND * MRT
1404                  *            = 0.9 MRT + rand(0,.2)  * MRT
1405                  */
1406                 delay = fr_rand();
1407                 delay ^= (delay >> 15);
1408                 delay &= 0x1ffff;
1409                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1410                 delay += mrt_usec - (mrt_usec / 10);
1411         }
1412
1413         request->delay = delay;
1414         request->when = now;
1415         tv_add(&request->when, request->delay);
1416         mrd = request->proxy_when;
1417         mrd.tv_sec += request->home_server->coa_mrd;
1418
1419         /*
1420          *      Cap duration at MRD.
1421          */
1422         if (timercmp(&mrd, &request->when, <)) {
1423                 request->when = mrd;
1424                 INSERT_EVENT(no_response_to_coa_request, request);
1425
1426         } else {
1427                 INSERT_EVENT(retransmit_coa_request, request);
1428         }
1429
1430         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1431                 if (!insert_into_proxy_hash(request, TRUE)) {
1432                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1433                         return;
1434                 }
1435
1436                 request->num_proxied_requests = 0;
1437                 request->num_proxied_responses = 0;
1438         }
1439
1440         request->num_proxied_requests++;
1441         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1442
1443         request->proxy_listener->send(request->proxy_listener,
1444                                       request);
1445 }
1446
1447
1448 /*
1449  *      The original request is either DONE, or in CLEANUP_DELAY.
1450  */
1451 static int originated_coa_request(REQUEST *request)
1452 {
1453         int delay, rcode, pre_proxy_type = 0;
1454         VALUE_PAIR *vp;
1455         REQUEST *coa;
1456         fr_ipaddr_t ipaddr;
1457         char buffer[256];
1458
1459         rad_assert(request->proxy == NULL);
1460         rad_assert(!request->in_proxy_hash);
1461         rad_assert(request->proxy_reply == NULL);
1462
1463         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1464         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1465         if (vp) {
1466                 if (vp->vp_integer == 0) {
1467                         ev_request_free(&request->coa);
1468                         return 1;       /* success */
1469                 }
1470
1471                 if (!request->coa) request_alloc_coa(request);
1472                 if (!request->coa) return 0;
1473         }
1474
1475         coa = request->coa;
1476
1477         /*
1478          *      src_ipaddr will be set up in proxy_encode.
1479          */
1480         memset(&ipaddr, 0, sizeof(ipaddr));
1481         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1482         if (vp) {
1483                 ipaddr.af = AF_INET;
1484                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1485
1486         } else if ((vp = pairfind(coa->proxy->vps,
1487                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1488                 ipaddr.af = AF_INET6;
1489                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1490
1491         } else if ((vp = pairfind(coa->proxy->vps,
1492                                   PW_HOME_SERVER_POOL)) != NULL) {
1493                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1494                                                   HOME_TYPE_COA);
1495                 if (!coa->home_pool) {
1496                         RDEBUG2("WARNING: No such home_server_pool %s",
1497                                vp->vp_strvalue);
1498         fail:
1499                         ev_request_free(&request->coa);
1500                         return 0;
1501                 }
1502
1503                 /*
1504                  *      Prefer
1505                  */
1506         } else if (request->client->coa_pool) {
1507                 coa->home_pool = request->client->coa_pool;
1508
1509         } else if (request->client->coa_server) {
1510                 coa->home_server = request->client->coa_server;
1511
1512         } else {
1513                 /*
1514                  *      If all else fails, send it to the client that
1515                  *      originated this request.
1516                  */
1517                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1518         }
1519
1520         /*
1521          *      Use the pool, if it exists.
1522          */
1523         if (coa->home_pool) {
1524                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1525                 if (!coa->home_server) {
1526                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1527                         goto fail;
1528                 }
1529
1530         } else if (!coa->home_server) {
1531                 int port = PW_COA_UDP_PORT;
1532
1533                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1534                 if (vp) port = vp->vp_integer;
1535
1536                 coa->home_server = home_server_find(&ipaddr, port);
1537                 if (!coa->home_server) {
1538                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1539                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1540                                          buffer, sizeof(buffer)), port);
1541                         goto fail;
1542                 }
1543         }
1544
1545         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1546         if (vp) {
1547                 switch (vp->vp_integer) {
1548                 case PW_COA_REQUEST:
1549                 case PW_DISCONNECT_REQUEST:
1550                         coa->proxy->code = vp->vp_integer;
1551                         break;
1552
1553                 default:
1554                         DEBUG("Cannot set CoA Packet-Type to code %d",
1555                               vp->vp_integer);
1556                         goto fail;
1557                 }
1558         }
1559
1560         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1561
1562         /*
1563          *      The rest of the server code assumes that
1564          *      request->packet && request->reply exist.  Copy them
1565          *      from the original request.
1566          */
1567         rad_assert(coa->packet != NULL);
1568         rad_assert(coa->packet->vps == NULL);
1569         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1570         coa->packet->vps = paircopy(request->packet->vps);
1571         coa->packet->data = NULL;
1572         rad_assert(coa->reply != NULL);
1573         rad_assert(coa->reply->vps == NULL);
1574         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1575         coa->reply->vps = paircopy(request->reply->vps);
1576         coa->reply->data = NULL;
1577         coa->config_items = paircopy(request->config_items);
1578
1579         /*
1580          *      Call the pre-proxy routines.
1581          */
1582         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1583         if (vp) {
1584                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1585                 pre_proxy_type = vp->vp_integer;
1586         }
1587
1588         if (coa->home_pool && coa->home_pool->virtual_server) {
1589                 const char *old_server = coa->server;
1590
1591                 coa->server = coa->home_pool->virtual_server;
1592                 RDEBUG2(" server %s {", coa->server);
1593                 rcode = module_pre_proxy(pre_proxy_type, coa);
1594                 RDEBUG2(" }");
1595                 coa->server = old_server;
1596         } else {
1597                 rcode = module_pre_proxy(pre_proxy_type, coa);
1598         }
1599         switch (rcode) {
1600         default:
1601                 goto fail;
1602
1603         /*
1604          *      Only send the CoA packet if the pre-proxy code succeeded.
1605          */
1606         case RLM_MODULE_NOOP:
1607         case RLM_MODULE_OK:
1608         case RLM_MODULE_UPDATED:
1609                 break;
1610         }
1611
1612         /*
1613          *      Source IP / port is set when the proxy socket
1614          *      is chosen.
1615          */
1616         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1617         coa->proxy->dst_port = coa->home_server->port;
1618
1619         if (!insert_into_proxy_hash(coa, FALSE)) {
1620                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1621                 goto fail;
1622         }
1623
1624         /*
1625          *      We CANNOT divorce the CoA request from the parent
1626          *      request.  This function is running in a child thread,
1627          *      and we need access to the main event loop in order to
1628          *      to add the timers for the CoA packet.  See
1629          *      wait_a_bit().
1630          */
1631
1632         /*
1633          *      Forget about the original request completely at this
1634          *      point.
1635          */
1636         request = coa;
1637
1638         gettimeofday(&request->proxy_when, NULL);
1639         request->received = request->next_when = request->proxy_when;
1640         rad_assert(request->proxy_reply == NULL);
1641
1642         /*
1643          *      Implement re-transmit algorithm as per RFC 5080
1644          *      Section 2.2.1.
1645          *
1646          *      We want IRT + RAND*IRT
1647          *      or 0.9 IRT + rand(0,.2) IRT
1648          *
1649          *      2^20 ~ USEC, and we want 2.
1650          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1651          */
1652         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1653         request->delay = delay * request->home_server->coa_irt;
1654         delay = request->home_server->coa_irt * USEC;
1655         delay -= delay / 10;
1656         delay += request->delay;
1657
1658         request->delay = delay;
1659         tv_add(&request->next_when, delay);
1660         request->next_callback = retransmit_coa_request;
1661
1662         /*
1663          *      Note that we set proxied BEFORE sending the packet.
1664          *
1665          *      Once we send it, the request is tainted, as
1666          *      another thread may have picked it up.  Don't
1667          *      touch it!
1668          */
1669         request->num_proxied_requests = 1;
1670         request->num_proxied_responses = 0;
1671         request->child_pid = NO_SUCH_CHILD_PID;
1672
1673         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1674
1675         request->child_state = REQUEST_PROXIED;
1676
1677         DEBUG_PACKET(request, request->proxy, 1);
1678
1679         request->proxy_listener->send(request->proxy_listener,
1680                                       request);
1681         return 1;
1682 }
1683 #endif  /* WITH_COA */
1684
1685 #ifdef WITH_PROXY
1686 static int process_proxy_reply(REQUEST *request)
1687 {
1688         int rcode;
1689         int post_proxy_type = 0;
1690         VALUE_PAIR *vp;
1691
1692         /*
1693          *      Delete any reply we had accumulated until now.
1694          */
1695         pairfree(&request->reply->vps);
1696
1697         /*
1698          *      Run the packet through the post-proxy stage,
1699          *      BEFORE playing games with the attributes.
1700          */
1701         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1702         if (vp) {
1703                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1704                 post_proxy_type = vp->vp_integer;
1705         }
1706
1707         if (request->home_pool && request->home_pool->virtual_server) {
1708                 const char *old_server = request->server;
1709
1710                 request->server = request->home_pool->virtual_server;
1711                 RDEBUG2(" server %s {", request->server);
1712                 rcode = module_post_proxy(post_proxy_type, request);
1713                 RDEBUG2(" }");
1714                 request->server = old_server;
1715         } else {
1716                 rcode = module_post_proxy(post_proxy_type, request);
1717         }
1718
1719 #ifdef WITH_COA
1720         if (request->packet->code == request->proxy->code)
1721           /*
1722            *    Don't run the next bit if we originated a CoA
1723            *    packet, after receiving an Access-Request or
1724            *    Accounting-Request.
1725            */
1726 #endif
1727
1728         /*
1729          *      There may NOT be a proxy reply, as we may be
1730          *      running Post-Proxy-Type = Fail.
1731          */
1732         if (request->proxy_reply) {
1733                 /*
1734                  *      Delete the Proxy-State Attributes from
1735                  *      the reply.  These include Proxy-State
1736                  *      attributes from us and remote server.
1737                  */
1738                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1739
1740                 /*
1741                  *      Add the attributes left in the proxy
1742                  *      reply to the reply list.
1743                  */
1744                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1745                 request->proxy_reply->vps = NULL;
1746
1747                 /*
1748                  *      Free proxy request pairs.
1749                  */
1750                 pairfree(&request->proxy->vps);
1751         }
1752
1753         switch (rcode) {
1754         default:  /* Don't do anything */
1755                 break;
1756         case RLM_MODULE_FAIL:
1757                 /* FIXME: debug print stuff */
1758                 request->child_state = REQUEST_DONE;
1759                 return 0;
1760
1761         case RLM_MODULE_HANDLED:
1762                 /* FIXME: debug print stuff */
1763                 request->child_state = REQUEST_DONE;
1764                 return 0;
1765         }
1766
1767         return 1;
1768 }
1769 #endif
1770
1771 static int request_pre_handler(REQUEST *request)
1772 {
1773         int rcode;
1774
1775         rad_assert(request->magic == REQUEST_MAGIC);
1776         rad_assert(request->packet != NULL);
1777
1778         request->child_state = REQUEST_RUNNING;
1779
1780         /*
1781          *      Don't decode the packet if it's an internal "fake"
1782          *      request.  Instead, just return so that the caller can
1783          *      process it.
1784          */
1785         if (request->packet->dst_port == 0) {
1786                 request->username = pairfind(request->packet->vps,
1787                                              PW_USER_NAME);
1788                 request->password = pairfind(request->packet->vps,
1789                                              PW_USER_PASSWORD);
1790                 return 1;
1791         }
1792
1793 #ifdef WITH_PROXY
1794         /*
1795          *      Put the decoded packet into it's proper place.
1796          */
1797         if (request->proxy_reply != NULL) {
1798                 rcode = request->proxy_listener->decode(request->proxy_listener,
1799                                                         request);
1800                 DEBUG_PACKET(request, request->proxy_reply, 0);
1801         } else
1802 #endif
1803         if (request->packet->vps == NULL) {
1804                 rcode = request->listener->decode(request->listener, request);
1805
1806                 if (debug_condition) {
1807                         int result = FALSE;
1808                         const char *my_debug = debug_condition;
1809
1810                         /*
1811                          *      Ignore parse errors.
1812                          */
1813                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1814                                                   &my_debug, 1,
1815                                                   &result);
1816                         if (result) {
1817                                 request->options = 2;
1818                                 request->radlog = radlog_request;
1819                         }
1820                 }
1821
1822                 DEBUG_PACKET(request, request->packet, 0);
1823         } else {
1824                 rcode = 0;
1825         }
1826
1827         if (rcode < 0) {
1828                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1829                 request->child_state = REQUEST_DONE;
1830                 return 0;
1831         }
1832
1833         if (!request->username) {
1834                 request->username = pairfind(request->packet->vps,
1835                                              PW_USER_NAME);
1836         }
1837
1838 #ifdef WITH_PROXY
1839         if (request->proxy) {
1840                 return process_proxy_reply(request);
1841 #endif
1842         }
1843
1844         return 1;
1845 }
1846
1847
1848 #ifdef WITH_PROXY
1849 /*
1850  *      Do state handling when we proxy a request.
1851  */
1852 static int proxy_request(REQUEST *request)
1853 {
1854         struct timeval when;
1855         char buffer[128];
1856
1857         if (request->home_server->server) {
1858                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1859                 return 0;
1860         }
1861
1862         if (!insert_into_proxy_hash(request, FALSE)) {
1863                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1864                 return 0;
1865         }
1866
1867         request->proxy_listener->encode(request->proxy_listener, request);
1868
1869         when = request->received;
1870         when.tv_sec += request->root->max_request_time;
1871
1872         gettimeofday(&request->proxy_when, NULL);
1873
1874         request->next_when = request->proxy_when;
1875         request->next_when.tv_sec += request->home_server->response_window;
1876
1877         rad_assert(request->home_server->response_window > 0);
1878
1879         if (timercmp(&when, &request->next_when, <)) {
1880                 request->next_when = when;
1881         }
1882         request->next_callback = no_response_to_proxied_request;
1883
1884         RDEBUG2("Proxying request %d to home server %s port %d",
1885                request->number,
1886                inet_ntop(request->proxy->dst_ipaddr.af,
1887                          &request->proxy->dst_ipaddr.ipaddr,
1888                          buffer, sizeof(buffer)),
1889                request->proxy->dst_port);
1890
1891         /*
1892          *      Note that we set proxied BEFORE sending the packet.
1893          *
1894          *      Once we send it, the request is tainted, as
1895          *      another thread may have picked it up.  Don't
1896          *      touch it!
1897          */
1898         request->num_proxied_requests = 1;
1899         request->num_proxied_responses = 0;
1900 #ifdef HAVE_PTHREAD_H
1901         request->child_pid = NO_SUCH_CHILD_PID;
1902 #endif
1903         request->child_state = REQUEST_PROXIED;
1904
1905         DEBUG_PACKET(request, request->proxy, 1);
1906
1907         request->proxy_listener->send(request->proxy_listener,
1908                                       request);
1909         return 1;
1910 }
1911
1912
1913 /*
1914  *      "Proxy" the request by sending it to a new virtual server.
1915  */
1916 static int proxy_to_virtual_server(REQUEST *request)
1917 {
1918         REQUEST *fake;
1919         RAD_REQUEST_FUNP fun;
1920
1921         if (!request->home_server || !request->home_server->server) return 0;
1922
1923         if (request->parent) {
1924                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1925                 return 0;
1926         }
1927
1928         fake = request_alloc_fake(request);
1929         if (!fake) {
1930                 RDEBUG2("WARNING: Out of memory");
1931                 return 0;
1932         }
1933
1934         fake->packet->vps = paircopy(request->proxy->vps);
1935         fake->server = request->home_server->server;
1936
1937         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1938                 fun = rad_authenticate;
1939
1940 #ifdef WITH_ACCOUNTING
1941         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1942                 fun = rad_accounting;
1943 #endif
1944
1945         } else {
1946                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1947                 ev_request_free(&fake);
1948                 return 0;
1949         }
1950
1951         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1952         radius_handle_request(fake, fun);
1953         RDEBUG2("<<< Received proxied response from internal virtual server.");
1954
1955         request->proxy_reply = fake->reply;
1956         fake->reply = NULL;
1957
1958         ev_request_free(&fake);
1959
1960         process_proxy_reply(request);
1961
1962         if (request->server) RDEBUG("server %s {",
1963                                     request->server != NULL ?
1964                                     request->server : "");
1965         fun(request);
1966
1967         if (request->server) RDEBUG("} # server %s",
1968                                     request->server != NULL ?
1969                                     request->server : "");
1970
1971         return 2;               /* success, but NOT '1' !*/
1972 }
1973
1974 /*
1975  *      Return 1 if we did proxy it, or the proxy attempt failed
1976  *      completely.  Either way, the caller doesn't touch the request
1977  *      any more if we return 1.
1978  */
1979 static int successfully_proxied_request(REQUEST *request)
1980 {
1981         int rcode;
1982         int pre_proxy_type = 0;
1983         VALUE_PAIR *realmpair;
1984         VALUE_PAIR *strippedname;
1985         VALUE_PAIR *vp;
1986         char *realmname = NULL;
1987         home_server *home;
1988         REALM *realm = NULL;
1989         home_pool_t *pool;
1990
1991         /*
1992          *      If it was already proxied, do nothing.
1993          *
1994          *      FIXME: This should really be a serious error.
1995          */
1996         if (request->in_proxy_hash ||
1997             (request->proxy_reply && (request->proxy_reply->code != 0))) {
1998                 return 0;
1999         }
2000
2001         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2002         if (!realmpair || (realmpair->length == 0)) {
2003                 int pool_type;
2004
2005                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2006                 if (!vp) return 0;
2007
2008                 switch (request->packet->code) {
2009                 case PW_AUTHENTICATION_REQUEST:
2010                         pool_type = HOME_TYPE_AUTH;
2011                         break;
2012
2013 #ifdef WITH_ACCOUNTING
2014                 case PW_ACCOUNTING_REQUEST:
2015                         pool_type = HOME_TYPE_ACCT;
2016                         break;
2017 #endif
2018
2019 #ifdef WITH_COA
2020                 case PW_COA_REQUEST:
2021                 case PW_DISCONNECT_REQUEST:
2022                         pool_type = HOME_TYPE_COA;
2023                         break;
2024 #endif
2025
2026                 default:
2027                         return 0;
2028                 }
2029
2030                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2031                 if (!pool) {
2032                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2033                                 vp->vp_strvalue);
2034                         return 0;
2035                 }
2036
2037                 realmname = NULL; /* no realms */
2038                 realm = NULL;
2039                 goto found_pool;
2040         }
2041
2042         realmname = (char *) realmpair->vp_strvalue;
2043
2044         realm = realm_find2(realmname);
2045         if (!realm) {
2046                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2047                 return 0;
2048         }
2049
2050         /*
2051          *      Figure out which pool to use.
2052          */
2053         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2054                 pool = realm->auth_pool;
2055
2056 #ifdef WITH_ACCOUNTING
2057         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2058                 pool = realm->acct_pool;
2059 #endif
2060
2061 #ifdef WITH_COA
2062         } else if ((request->packet->code == PW_COA_REQUEST) ||
2063                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2064                 pool = realm->acct_pool;
2065 #endif
2066
2067         } else {
2068                 rad_panic("Internal sanity check failed");
2069         }
2070
2071         if (!pool) {
2072                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2073                        realmname);
2074                 return 0;
2075         }
2076
2077 found_pool:
2078         home = home_server_ldb(realmname, pool, request);
2079         if (!home) {
2080                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2081                        realmname);
2082                 return -1;
2083         }
2084         request->home_pool = pool;
2085
2086 #ifdef WITH_COA
2087         /*
2088          *      Once we've decided to proxy a request, we cannot send
2089          *      a CoA packet.  So we free up any CoA packet here.
2090          */
2091         ev_request_free(&request->coa);
2092 #endif
2093         /*
2094          *      Remember that we sent the request to a Realm.
2095          */
2096         if (realmname) pairadd(&request->packet->vps,
2097                                pairmake("Realm", realmname, T_OP_EQ));
2098
2099         /*
2100          *      Strip the name, if told to.
2101          *
2102          *      Doing it here catches the case of proxied tunneled
2103          *      requests.
2104          */
2105         if (realm && (realm->striprealm == TRUE) &&
2106            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2107                 /*
2108                  *      If there's a Stripped-User-Name attribute in
2109                  *      the request, then use THAT as the User-Name
2110                  *      for the proxied request, instead of the
2111                  *      original name.
2112                  *
2113                  *      This is done by making a copy of the
2114                  *      Stripped-User-Name attribute, turning it into
2115                  *      a User-Name attribute, deleting the
2116                  *      Stripped-User-Name and User-Name attributes
2117                  *      from the vps list, and making the new
2118                  *      User-Name the head of the vps list.
2119                  */
2120                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2121                 if (!vp) {
2122                         vp = radius_paircreate(request, NULL,
2123                                                PW_USER_NAME, PW_TYPE_STRING);
2124                         rad_assert(vp != NULL); /* handled by above function */
2125                         /* Insert at the START of the list */
2126                         vp->next = request->proxy->vps;
2127                         request->proxy->vps = vp;
2128                 }
2129                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2130                        sizeof(vp->vp_strvalue));
2131                 vp->length = strippedname->length;
2132
2133                 /*
2134                  *      Do NOT delete Stripped-User-Name.
2135                  */
2136         }
2137
2138         /*
2139          *      If there is no PW_CHAP_CHALLENGE attribute but
2140          *      there is a PW_CHAP_PASSWORD we need to add it
2141          *      since we can't use the request authenticator
2142          *      anymore - we changed it.
2143          */
2144         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2145             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2146             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2147                 vp = radius_paircreate(request, &request->proxy->vps,
2148                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2149                 vp->length = AUTH_VECTOR_LEN;
2150                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2151         }
2152
2153         /*
2154          *      The RFC's say we have to do this, but FreeRADIUS
2155          *      doesn't need it.
2156          */
2157         vp = radius_paircreate(request, &request->proxy->vps,
2158                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2159         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2160                  request->packet->id);
2161         vp->length = strlen(vp->vp_strvalue);
2162
2163         /*
2164          *      Should be done BEFORE inserting into proxy hash, as
2165          *      pre-proxy may use this information, or change it.
2166          */
2167         request->proxy->code = request->packet->code;
2168
2169         /*
2170          *      Call the pre-proxy routines.
2171          */
2172         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2173         if (vp) {
2174                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2175                 pre_proxy_type = vp->vp_integer;
2176         }
2177
2178         rad_assert(request->home_pool != NULL);
2179
2180         if (request->home_pool->virtual_server) {
2181                 const char *old_server = request->server;
2182
2183                 request->server = request->home_pool->virtual_server;
2184                 RDEBUG2(" server %s {", request->server);
2185                 rcode = module_pre_proxy(pre_proxy_type, request);
2186                 RDEBUG2(" }");
2187                         request->server = old_server;
2188         } else {
2189                 rcode = module_pre_proxy(pre_proxy_type, request);
2190         }
2191         switch (rcode) {
2192         case RLM_MODULE_FAIL:
2193         case RLM_MODULE_INVALID:
2194         case RLM_MODULE_NOTFOUND:
2195         case RLM_MODULE_USERLOCK:
2196         default:
2197                 /* FIXME: debug print failed stuff */
2198                 return -1;
2199
2200         case RLM_MODULE_REJECT:
2201         case RLM_MODULE_HANDLED:
2202                 return 0;
2203
2204         /*
2205          *      Only proxy the packet if the pre-proxy code succeeded.
2206          */
2207         case RLM_MODULE_NOOP:
2208         case RLM_MODULE_OK:
2209         case RLM_MODULE_UPDATED:
2210                 break;
2211         }
2212
2213         /*
2214          *      If it's a fake request, don't send the proxy
2215          *      packet.  The outer tunnel session will take
2216          *      care of doing that.
2217          */
2218         if (request->packet->dst_port == 0) {
2219                 request->home_server = NULL;
2220                 return 1;
2221         }
2222
2223         if (request->home_server->server) {
2224                 return proxy_to_virtual_server(request);
2225         }
2226
2227         if (!proxy_request(request)) {
2228                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2229                 return -1;
2230         }
2231
2232         return 1;
2233 }
2234 #endif
2235
2236 static void request_post_handler(REQUEST *request)
2237 {
2238         int child_state = -1;
2239         struct timeval when;
2240         VALUE_PAIR *vp;
2241
2242         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2243             (request->parent &&
2244              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2245                 RDEBUG2("Request %d was cancelled.", request->number);
2246 #ifdef HAVE_PTHREAD_H
2247                 request->child_pid = NO_SUCH_CHILD_PID;
2248 #endif
2249                 child_state = REQUEST_DONE;
2250                 goto cleanup;
2251         }
2252
2253         if (request->child_state != REQUEST_RUNNING) {
2254                 rad_panic("Internal sanity check failed");
2255         }
2256
2257 #ifdef WITH_COA
2258         /*
2259          *      If it's not in the request hash, it's a CoA request.
2260          *      We hope.
2261          */
2262         if (!request->in_request_hash &&
2263             request->proxy &&
2264             ((request->proxy->code == PW_COA_REQUEST) ||
2265              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2266                 request->next_callback = NULL;
2267                 child_state = REQUEST_DONE;
2268                 goto cleanup;
2269         }
2270 #endif
2271
2272         if ((request->reply->code == 0) &&
2273             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2274             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2275                 request->reply->code = PW_AUTHENTICATION_REJECT;
2276         }
2277
2278 #ifdef WITH_PROXY
2279         if (request->root->proxy_requests &&
2280             !request->in_proxy_hash &&
2281             (request->reply->code == 0) &&
2282             (request->packet->dst_port != 0) &&
2283             (request->packet->code != PW_STATUS_SERVER)) {
2284                 int rcode = successfully_proxied_request(request);
2285
2286                 if (rcode == 1) return; /* request is invalid */
2287
2288                 /*
2289                  *      Failed proxying it (dead home servers, etc.)
2290                  *      Run it through Post-Proxy-Type = Fail, and
2291                  *      respond to the request.
2292                  *
2293                  *      Note that we're in a child thread here, so we
2294                  *      do NOT re-schedule the request.  Instead, we
2295                  *      do what we would have done, which is run the
2296                  *      pre-handler, a NULL request handler, and then
2297                  *      the post handler.
2298                  */
2299                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2300                         request_pre_handler(request);
2301                 }
2302
2303                 /*
2304                  *      Else we weren't supposed to proxy it,
2305                  *      OR we proxied it internally to a virutal server.
2306                  */
2307         }
2308 #endif
2309
2310         /*
2311          *      Fake requests don't get encoded or signed.  The caller
2312          *      also requires the reply VP's, so we don't free them
2313          *      here!
2314          */
2315         if (request->packet->dst_port == 0) {
2316                 /* FIXME: RDEBUG going to the next request */
2317 #ifdef HAVE_PTHREAD_H
2318                 request->child_pid = NO_SUCH_CHILD_PID;
2319 #endif
2320                 request->child_state = REQUEST_DONE;
2321                 return;
2322         }
2323
2324 #ifdef WITH_PROXY
2325         /*
2326          *      Copy Proxy-State from the request to the reply.
2327          */
2328         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2329         if (vp) pairadd(&request->reply->vps, vp);
2330 #endif
2331
2332         /*
2333          *      Access-Requests get delayed or cached.
2334          */
2335         switch (request->packet->code) {
2336         case PW_AUTHENTICATION_REQUEST:
2337                 gettimeofday(&request->next_when, NULL);
2338
2339                 if (request->reply->code == 0) {
2340                         /*
2341                          *      Check if the lack of response is intentional.
2342                          */
2343                         vp = pairfind(request->config_items,
2344                                       PW_RESPONSE_PACKET_TYPE);
2345                         if (!vp) {
2346                                 RDEBUG2("There was no response configured: rejecting request %d",
2347                                        request->number);
2348                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2349
2350                         } else if (vp->vp_integer == 256) {
2351                                 RDEBUG2("Not responding to request %d",
2352                                        request->number);
2353
2354                                 /*
2355                                  *      Force cleanup after a long
2356                                  *      time, so that we don't
2357                                  *      re-process the packet.
2358                                  */
2359                                 request->next_when.tv_sec += request->root->max_request_time;
2360                                 request->next_callback = cleanup_delay;
2361                                 child_state = REQUEST_CLEANUP_DELAY;
2362                                 break;
2363                         } else {
2364                                 request->reply->code = vp->vp_integer;
2365
2366                         }
2367                 }
2368
2369                 /*
2370                  *      Run rejected packets through
2371                  *
2372                  *      Post-Auth-Type = Reject
2373                  */
2374                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2375                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2376                         vp = radius_pairmake(request, &request->config_items,
2377                                              "Post-Auth-Type", "Reject",
2378                                              T_OP_SET);
2379                         if (vp) rad_postauth(request);
2380
2381                         /*
2382                          *      If configured, delay Access-Reject packets.
2383                          *
2384                          *      If request->root->reject_delay = 0, we discover
2385                          *      that we have to send the packet now.
2386                          */
2387                         when = request->received;
2388                         when.tv_sec += request->root->reject_delay;
2389
2390                         if (timercmp(&when, &request->next_when, >)) {
2391                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2392                                        request->number,
2393                                        request->root->reject_delay);
2394                                 request->next_when = when;
2395                                 request->next_callback = reject_delay;
2396 #ifdef HAVE_PTHREAD_H
2397                                 request->child_pid = NO_SUCH_CHILD_PID;
2398 #endif
2399                                 request->child_state = REQUEST_REJECT_DELAY;
2400                                 return;
2401                         }
2402                 }
2403
2404 #ifdef WITH_COA
2405         case PW_COA_REQUEST:
2406         case PW_DISCONNECT_REQUEST:
2407 #endif
2408                 request->next_when.tv_sec += request->root->cleanup_delay;
2409                 request->next_callback = cleanup_delay;
2410                 child_state = REQUEST_CLEANUP_DELAY;
2411                 break;
2412
2413         case PW_ACCOUNTING_REQUEST:
2414                 request->next_callback = NULL; /* just to be safe */
2415                 child_state = REQUEST_DONE;
2416                 break;
2417
2418                 /*
2419                  *      FIXME: Status-Server should probably not be
2420                  *      handled here...
2421                  */
2422         case PW_STATUS_SERVER:
2423                 request->next_callback = NULL;
2424                 child_state = REQUEST_DONE;
2425                 break;
2426
2427         default:
2428                 if ((request->packet->code > 1024) &&
2429                     (request->packet->code < (1024 + 254 + 1))) {
2430                         request->next_callback = NULL;
2431                         child_state = REQUEST_DONE;
2432                         break;
2433                 }
2434
2435                 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2436                 request->next_callback = NULL;
2437                 child_state = REQUEST_DONE;
2438                 break;
2439         }
2440
2441         /*
2442          *      Suppress "no reply" packets here, unless we're reading
2443          *      from the "detail" file.  In that case, we've got to
2444          *      tell the detail file handler that the request is dead,
2445          *      and it should re-send it.
2446          *      If configured, encode, sign, and send.
2447          */
2448         if ((request->reply->code != 0) ||
2449             (request->listener->type == RAD_LISTEN_DETAIL)) {
2450                 DEBUG_PACKET(request, request->reply, 1);
2451                 request->listener->send(request->listener, request);
2452         }
2453
2454 #ifdef WITH_COA
2455         /*
2456          *      Now that we've completely processed the request,
2457          *      see if we need to originate a CoA request.
2458          */
2459         if (request->coa ||
2460             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2461                 if (!originated_coa_request(request)) {
2462                         RDEBUG2("Do CoA Fail handler here");
2463                 }
2464                 /* request->coa is stil set, so we can update events */
2465         }
2466 #endif
2467
2468  cleanup:
2469         /*
2470          *      Clean up.  These are no longer needed.
2471          */
2472         pairfree(&request->config_items);
2473
2474         pairfree(&request->packet->vps);
2475         request->username = NULL;
2476         request->password = NULL;
2477
2478         pairfree(&request->reply->vps);
2479
2480 #ifdef WITH_PROXY
2481         if (request->proxy) {
2482                 pairfree(&request->proxy->vps);
2483
2484                 if (request->proxy_reply) {
2485                         pairfree(&request->proxy_reply->vps);
2486                 }
2487
2488 #if 0
2489                 /*
2490                  *      We're not tracking responses from the home
2491                  *      server, we can therefore free this memory in
2492                  *      the child thread.
2493                  */
2494                 if (!request->in_proxy_hash) {
2495                         rad_free(&request->proxy);
2496                         rad_free(&request->proxy_reply);
2497                         request->home_server = NULL;
2498                 }
2499 #endif
2500         }
2501 #endif
2502
2503         RDEBUG2("Finished request %d.", request->number);
2504         rad_assert(child_state >= 0);
2505         request->child_state = child_state;
2506
2507         /*
2508          *      Single threaded mode: update timers now.
2509          */
2510         if (!have_children) wait_a_bit(request);
2511 }
2512
2513
2514 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2515 {
2516 #ifdef WITH_PROXY
2517         char buffer[128];
2518 #endif
2519
2520         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2521         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2522
2523         switch (request->child_state) {
2524         case REQUEST_QUEUED:
2525         case REQUEST_RUNNING:
2526 #ifdef WITH_PROXY
2527         discard:
2528 #endif
2529                 radlog(L_ERR, "Discarding duplicate request from "
2530                        "client %s port %d - ID: %d due to unfinished request %d",
2531                        client->shortname,
2532                        request->packet->src_port,request->packet->id,
2533                        request->number);
2534                 break;
2535
2536 #ifdef WITH_PROXY
2537         case REQUEST_PROXIED:
2538                 /*
2539                  *      We're not supposed to have duplicate
2540                  *      accounting packets.  The other states handle
2541                  *      duplicates fine (discard, or send duplicate
2542                  *      reply).  But we do NOT want to retransmit an
2543                  *      accounting request here, because that would
2544                  *      involve updating the Acct-Delay-Time, and
2545                  *      therefore changing the packet Id, etc.
2546                  *
2547                  *      Instead, we just discard the packet.  We may
2548                  *      eventually respond, or the client will send a
2549                  *      new accounting packet.
2550                  *
2551                  *      The same comments go for Status-Server, and
2552                  *      other packet types.
2553                  *
2554                  *      FIXME: coa: when we proxy CoA && Disconnect
2555                  *      packets, this logic has to be fixed.
2556                  */
2557                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2558                         goto discard;
2559                 }
2560
2561                 check_for_zombie_home_server(request);
2562
2563                 /*
2564                  *      If we've just discovered that the home server is
2565                  *      dead, send the packet to another one.
2566                  */
2567                 if ((request->packet->dst_port != 0) &&
2568                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2569                         home_server *home;
2570
2571                         remove_from_proxy_hash(request);
2572
2573                         home = home_server_ldb(NULL, request->home_pool, request);
2574                         if (!home) {
2575                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2576                         no_home_servers:
2577                                 /*
2578                                  *      Do post-request processing,
2579                                  *      and any insertion of necessary
2580                                  *      events.
2581                                  */
2582                                 post_proxy_fail_handler(request);
2583                                 return;
2584                         }
2585
2586                         request->proxy->code = request->packet->code;
2587
2588                         /*
2589                          *      Free the old packet, to force re-encoding
2590                          */
2591                         free(request->proxy->data);
2592                         request->proxy->data = NULL;
2593                         request->proxy->data_len = 0;
2594
2595                         /*
2596                          *      This request failed over to a virtual
2597                          *      server.  Push it back onto the queue
2598                          *      to be processed.
2599                          */
2600                         if (request->home_server->server) {
2601                                 proxy_fallback_handler(request);
2602                                 return;
2603                         }
2604
2605                         /*
2606                          *      Try to proxy the request.
2607                          */
2608                         if (!proxy_request(request)) {
2609                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2610                                 goto no_home_servers;
2611                         }
2612
2613                         /*
2614                          *      This code executes in the main server
2615                          *      thread, so there's no need for locking.
2616                          */
2617                         rad_assert(request->next_callback != NULL);
2618                         INSERT_EVENT(request->next_callback, request);
2619                         request->next_callback = NULL;
2620                         return;
2621                 } /* else the home server is still alive */
2622
2623                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2624                        inet_ntop(request->proxy->dst_ipaddr.af,
2625                                  &request->proxy->dst_ipaddr.ipaddr,
2626                                  buffer, sizeof(buffer)),
2627                        request->proxy->dst_port,
2628                        request->proxy->id);
2629                 request->num_proxied_requests++;
2630
2631                 DEBUG_PACKET(request, request->proxy, 1);
2632                 request->proxy_listener->send(request->proxy_listener,
2633                                               request);
2634                 break;
2635 #endif
2636
2637         case REQUEST_REJECT_DELAY:
2638                 RDEBUG2("Waiting to send Access-Reject "
2639                        "to client %s port %d - ID: %d",
2640                        client->shortname,
2641                        request->packet->src_port, request->packet->id);
2642                 break;
2643
2644         case REQUEST_CLEANUP_DELAY:
2645         case REQUEST_DONE:
2646                 if (request->reply->code == 0) {
2647                         RDEBUG2("Ignoring retransmit from client %s port %d "
2648                                 "- ID: %d, no reply was configured",
2649                                 client->shortname,
2650                                 request->packet->src_port, request->packet->id);
2651                         return;
2652                 }
2653
2654                 /*
2655                  *      FIXME: This sends duplicate replies to
2656                  *      accounting requests, even if Acct-Delay-Time
2657                  *      or Event-Timestamp is in the packet.  In those
2658                  *      cases, the Id should be changed, and the packet
2659                  *      re-calculated.
2660                  */
2661                 RDEBUG2("Sending duplicate reply "
2662                        "to client %s port %d - ID: %d",
2663                        client->shortname,
2664                        request->packet->src_port, request->packet->id);
2665                 DEBUG_PACKET(request, request->reply, 1);
2666                 request->listener->send(request->listener, request);
2667                 break;
2668         }
2669 }
2670
2671
2672 static void received_conflicting_request(REQUEST *request,
2673                                          const RADCLIENT *client)
2674 {
2675         radlog(L_ERR, "Received conflicting packet from "
2676                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2677                client->shortname,
2678                request->packet->src_port, request->packet->id,
2679                request->number);
2680
2681         /*
2682          *      Nuke it from the request hash, so we can receive new
2683          *      packets.
2684          */
2685         remove_from_request_hash(request);
2686
2687         switch (request->child_state) {
2688 #ifdef HAVE_PTHREAD_H
2689                 /*
2690                  *      It's queued or running.  Tell it to stop, and
2691                  *      wait for it to do so.
2692                  */
2693         case REQUEST_QUEUED:
2694         case REQUEST_RUNNING:
2695                 request->master_state = REQUEST_STOP_PROCESSING;
2696                 request->delay += request->delay >> 1;
2697
2698                 tv_add(&request->when, request->delay);
2699
2700                 INSERT_EVENT(wait_for_child_to_die, request);
2701                 return;
2702 #endif
2703
2704                 /*
2705                  *      It's in some other state, and therefore also
2706                  *      in the event queue.  At some point, the
2707                  *      child will notice, and we can then delete it.
2708                  */
2709         default:
2710                 rad_assert(request->ev != NULL);
2711                 break;
2712         }
2713 }
2714
2715
2716 static int can_handle_new_request(RADIUS_PACKET *packet,
2717                                   RADCLIENT *client,
2718                                   struct main_config_t *root)
2719 {
2720         /*
2721          *      Count the total number of requests, to see if
2722          *      there are too many.  If so, return with an
2723          *      error.
2724          */
2725         if (root->max_requests) {
2726                 int request_count = fr_packet_list_num_elements(pl);
2727
2728                 /*
2729                  *      This is a new request.  Let's see if
2730                  *      it makes us go over our configured
2731                  *      bounds.
2732                  */
2733                 if (request_count > root->max_requests) {
2734                         radlog(L_ERR, "Dropping request (%d is too many): "
2735                                "from client %s port %d - ID: %d", request_count,
2736                                client->shortname,
2737                                packet->src_port, packet->id);
2738                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2739                                "\tThe value for 'max_requests' is probably set too low.\n");
2740                         return 0;
2741                 } /* else there were a small number of requests */
2742         } /* else there was no configured limit for requests */
2743
2744         /*
2745          *      FIXME: Add per-client checks.  If one client is sending
2746          *      too many packets, start discarding them.
2747          *
2748          *      We increment the counters here, and decrement them
2749          *      when the response is sent... somewhere in this file.
2750          */
2751
2752         /*
2753          *      FUTURE: Add checks for system load.  If the system is
2754          *      busy, start dropping requests...
2755          *
2756          *      We can probably keep some statistics ourselves...  if
2757          *      there are more requests coming in than we can handle,
2758          *      start dropping some.
2759          */
2760
2761         return 1;
2762 }
2763
2764
2765 int received_request(rad_listen_t *listener,
2766                      RADIUS_PACKET *packet, REQUEST **prequest,
2767                      RADCLIENT *client)
2768 {
2769         RADIUS_PACKET **packet_p;
2770         REQUEST *request = NULL;
2771         struct main_config_t *root = &mainconfig;
2772
2773         packet_p = fr_packet_list_find(pl, packet);
2774         if (packet_p) {
2775                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2776                 rad_assert(request->in_request_hash);
2777
2778                 if ((request->packet->data_len == packet->data_len) &&
2779                     (memcmp(request->packet->vector, packet->vector,
2780                             sizeof(packet->vector)) == 0)) {
2781                         received_retransmit(request, client);
2782                         return 0;
2783                 }
2784
2785                 /*
2786                  *      The new request is different from the old one,
2787                  *      but maybe the old is finished.  If so, delete
2788                  *      the old one.
2789                  */
2790                 switch (request->child_state) {
2791                         struct timeval when;
2792
2793                 default:
2794                         /*
2795                          *      Special hacks for race conditions.
2796                          *      The reply is encoded, and therefore
2797                          *      likely sent.  We received a *new*
2798                          *      packet from the client, likely before
2799                          *      the next line or two of code which
2800                          *      updated the child state.  In this
2801                          *      case, just accept the new request.
2802                          */
2803                         if ((request->reply->code != 0) &&
2804                             request->reply->data) {
2805                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2806                                        client->shortname,
2807                                        packet->src_port, packet->id,
2808                                        request->number);
2809                                 remove_from_request_hash(request);
2810                                 request = NULL;
2811                                 break;
2812                         }
2813
2814                         gettimeofday(&when, NULL);
2815                         when.tv_sec -= 1;
2816
2817                         /*
2818                          *      If the cached request was received
2819                          *      within the last second, then we
2820                          *      discard the NEW request instead of the
2821                          *      old one.  This will happen ONLY when
2822                          *      the client is severely broken, and is
2823                          *      sending conflicting packets very
2824                          *      quickly.
2825                          */
2826                         if (timercmp(&when, &request->received, <)) {
2827                                 radlog(L_ERR, "Discarding conflicting packet from "
2828                                        "client %s port %d - ID: %d due to recent request %d.",
2829                                        client->shortname,
2830                                        packet->src_port, packet->id,
2831                                        request->number);
2832                                 return 0;
2833                         }
2834
2835                         received_conflicting_request(request, client);
2836                         request = NULL;
2837                         break;
2838
2839                 case REQUEST_REJECT_DELAY:
2840                 case REQUEST_CLEANUP_DELAY:
2841                         request->child_state = REQUEST_DONE;
2842                 case REQUEST_DONE:
2843                         cleanup_delay(request);
2844                         request = NULL;
2845                         break;
2846                 }
2847         }
2848
2849         /*
2850          *      We may want to quench the new request.
2851          */
2852         if ((listener->type != RAD_LISTEN_DETAIL) &&
2853             !can_handle_new_request(packet, client, root)) {
2854                 return 0;
2855         }
2856
2857         /*
2858          *      Create and initialize the new request.
2859          */
2860         request = request_alloc(); /* never fails */
2861
2862         if ((request->reply = rad_alloc(0)) == NULL) {
2863                 radlog(L_ERR, "No memory");
2864                 exit(1);
2865         }
2866
2867         request->listener = listener;
2868         request->client = client;
2869         request->packet = packet;
2870         request->packet->timestamp = request->timestamp;
2871         request->number = request_num_counter++;
2872         request->priority = listener->type;
2873 #ifdef HAVE_PTHREAD_H
2874         request->child_pid = NO_SUCH_CHILD_PID;
2875 #endif
2876
2877         /*
2878          *      Status-Server packets go to the head of the queue.
2879          */
2880         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2881
2882         /*
2883          *      Set virtual server identity
2884          */
2885         if (client->server) {
2886                 request->server = client->server;
2887         } else if (listener->server) {
2888                 request->server = listener->server;
2889         } else {
2890                 request->server = NULL;
2891         }
2892
2893         /*
2894          *      Remember the request in the list.
2895          */
2896         if (!fr_packet_list_insert(pl, &request->packet)) {
2897                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2898                 ev_request_free(&request);
2899                 return 0;
2900         }
2901
2902         request->in_request_hash = TRUE;
2903         request->root = root;
2904         root->refcount++;
2905
2906         /*
2907          *      The request passes many of our sanity checks.
2908          *      From here on in, if anything goes wrong, we
2909          *      send a reject message, instead of dropping the
2910          *      packet.
2911          */
2912
2913         /*
2914          *      Build the reply template from the request.
2915          */
2916
2917         request->reply->sockfd = request->packet->sockfd;
2918         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2919         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2920         request->reply->dst_port = request->packet->src_port;
2921         request->reply->src_port = request->packet->dst_port;
2922         request->reply->id = request->packet->id;
2923         request->reply->code = 0; /* UNKNOWN code */
2924         memcpy(request->reply->vector, request->packet->vector,
2925                sizeof(request->reply->vector));
2926         request->reply->vps = NULL;
2927         request->reply->data = NULL;
2928         request->reply->data_len = 0;
2929
2930         request->master_state = REQUEST_ACTIVE;
2931         request->child_state = REQUEST_QUEUED;
2932         request->next_callback = NULL;
2933
2934         gettimeofday(&request->received, NULL);
2935         request->timestamp = request->received.tv_sec;
2936         request->when = request->received;
2937
2938         request->delay = USEC;
2939
2940         tv_add(&request->when, request->delay);
2941
2942         INSERT_EVENT(wait_a_bit, request);
2943
2944         *prequest = request;
2945         return 1;
2946 }
2947
2948
2949 #ifdef WITH_PROXY
2950 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2951 {
2952         char            buffer[128];
2953         REQUEST         *request;
2954
2955         /*
2956          *      Also removes from the proxy hash if responses == requests
2957          */
2958         request = lookup_in_proxy_hash(packet);
2959
2960         if (!request) {
2961                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2962                        inet_ntop(packet->src_ipaddr.af,
2963                                  &packet->src_ipaddr.ipaddr,
2964                                  buffer, sizeof(buffer)),
2965                        packet->src_port, packet->id);
2966                 return NULL;
2967         }
2968
2969         /*
2970          *      We haven't replied to the NAS, but we have seen an
2971          *      earlier reply from the home server.  Ignore this packet,
2972          *      as we're likely still processing the previous reply.
2973          */
2974         if (request->proxy_reply) {
2975                 if (memcmp(request->proxy_reply->vector,
2976                            packet->vector,
2977                            sizeof(request->proxy_reply->vector)) == 0) {
2978                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
2979                                inet_ntop(packet->src_ipaddr.af,
2980                                          &packet->src_ipaddr.ipaddr,
2981                                          buffer, sizeof(buffer)),
2982                                packet->src_port, packet->id,
2983                                request->number);
2984                 } else {
2985                         /*
2986                          *      ? The home server gave us a new proxy
2987                          *      reply which doesn't match the old
2988                          *      one.  Delete it.
2989                          */
2990                         RDEBUG2("Ignoring conflicting proxy reply");
2991                 }
2992
2993                 /* assert that there's an event queued for request? */
2994                 return NULL;
2995         }
2996
2997         /*
2998          *      Verify the packet before doing ANYTHING with it.  This
2999          *      means we're doing more MD5 checks in the server core.
3000          *      However, we can fix that by moving to multiple threads
3001          *      listening on sockets.
3002          *
3003          *      We do this AFTER looking the request up in the hash,
3004          *      and AFTER vhecking if we saw a previous request.  This
3005          *      helps minimize the DoS effect of people attacking us
3006          *      with spoofed packets.
3007          */
3008         if (rad_verify(packet, request->proxy,
3009                        request->home_server->secret) != 0) {
3010                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3011                 return NULL;
3012         }
3013
3014         gettimeofday(&now, NULL);
3015
3016         /*
3017          *      Maybe move this earlier in the decision process?
3018          *      Having it here means that late or duplicate proxy
3019          *      replies no longer get the home server marked as
3020          *      "alive".  This might be good for stability, though.
3021          *
3022          *      FIXME: Do we really want to do this whenever we
3023          *      receive a packet?  Setting this here means that we
3024          *      mark it alive on *any* packet, even if it's lost all
3025          *      of the *other* packets in the last 10s.
3026          */
3027         request->home_server->state = HOME_STATE_ALIVE;
3028
3029 #ifdef WITH_COA
3030         /*
3031          *      When originating CoA, the "proxy" reply is the reply
3032          *      to the CoA request that we originated.  At this point,
3033          *      the original request is finished, and it has a reply.
3034          *
3035          *      However, if we haven't separated the two requests, do
3036          *      so now.  This is done so that cleaning up the original
3037          *      request won't cause the CoA request to be free'd.  See
3038          *      util.c, request_free()
3039          */
3040         if (request->parent && (request->parent->coa == request)) {
3041                 request->parent->coa = NULL;
3042                 request->parent = NULL;
3043
3044         } else
3045                 /*
3046                  *      Skip the next set of checks, as the original
3047                  *      reply is cached.  We want to be able to still
3048                  *      process the CoA reply, AND to reference the
3049                  *      original request/reply.
3050                  *
3051                  *      This is getting to be really quite a bit of a
3052                  *      hack.
3053                  */
3054 #endif
3055
3056         /*
3057          *      If there's a reply to the NAS, ignore everything
3058          *      related to proxy responses
3059          */
3060         if (request->reply && request->reply->code != 0) {
3061                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3062                 return NULL;
3063         }
3064
3065 #ifdef WITH_STATS
3066         /*
3067          *      The average includes our time to receive packets and
3068          *      look them up in the hashes, which should be the same
3069          *      for all packets.
3070          *
3071          *      We update the response time only for the FIRST packet
3072          *      we receive.
3073          */
3074         if (request->home_server->ema.window > 0) {
3075                 radius_stats_ema(&request->home_server->ema,
3076                                  &now, &request->proxy_when);
3077         }
3078 #endif
3079
3080         switch (request->child_state) {
3081         case REQUEST_QUEUED:
3082         case REQUEST_RUNNING:
3083                 radlog(L_ERR, "Internal sanity check failed for child state");
3084                 /* FALL-THROUGH */
3085
3086         case REQUEST_REJECT_DELAY:
3087         case REQUEST_CLEANUP_DELAY:
3088         case REQUEST_DONE:
3089                 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'",
3090                        inet_ntop(packet->src_ipaddr.af,
3091                                  &packet->src_ipaddr.ipaddr,
3092                                  buffer, sizeof(buffer)),
3093                        packet->src_port, packet->id,
3094                        request->number);
3095                 /* assert that there's an event queued for request? */
3096                 return NULL;
3097
3098         case REQUEST_PROXIED:
3099                 break;
3100         }
3101
3102         request->proxy_reply = packet;
3103
3104 #if 0
3105         /*
3106          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3107          *      Note that we only do so on the first response.
3108          */
3109         if ((request->num_proxied_responses == 1)
3110                 int rtt;
3111                 home_server *home = request->home_server;
3112
3113                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3114                 rtt *= USEC;
3115                 rtt += now.tv_usec;
3116                 rtt -= request->proxy_when.tv_usec;
3117
3118                 if (!home->has_rtt) {
3119                         home->has_rtt = TRUE;
3120
3121                         home->srtt = rtt;
3122                         home->rttvar = rtt / 2;
3123
3124                 } else {
3125                         home->rttvar -= home->rttvar >> 2;
3126                         home->rttvar += (home->srtt - rtt);
3127                         home->srtt -= home->srtt >> 3;
3128                         home->srtt += rtt >> 3;
3129                 }
3130
3131                 home->rto = home->srtt;
3132                 if (home->rttvar > (USEC / 4)) {
3133                         home->rto += home->rttvar * 4;
3134                 } else {
3135                         home->rto += USEC;
3136                 }
3137         }
3138 #endif
3139
3140         /*
3141          *      There's no incoming request, so it's a proxied packet
3142          *      we originated.
3143          */
3144         if (!request->packet) {
3145                 received_response_to_ping(request);
3146                 request->proxy_reply = NULL; /* caller will free it */
3147                 ev_request_free(&request);
3148                 return NULL;
3149         }
3150
3151         request->child_state = REQUEST_QUEUED;
3152         request->when = now;
3153         request->delay = USEC;
3154         request->priority = RAD_LISTEN_PROXY;
3155         tv_add(&request->when, request->delay);
3156
3157         /*
3158          *      Wait a bit will take care of max_request_time
3159          */
3160         INSERT_EVENT(wait_a_bit, request);
3161
3162         return request;
3163 }
3164 #endif
3165
3166 void event_new_fd(rad_listen_t *this)
3167 {
3168         char buffer[1024];
3169
3170         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3171
3172         this->print(this, buffer, sizeof(buffer));
3173
3174         if (this->status == RAD_LISTEN_STATUS_INIT) {
3175                 if (just_started) {
3176                         DEBUG("Listening on %s", buffer);
3177                 } else {
3178                         DEBUG2(" ... adding new socket %s", buffer);
3179                 }
3180                 if (!fr_event_fd_insert(el, 0, this->fd,
3181                                         event_socket_handler, this)) {
3182                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3183                         exit(1);
3184                 }
3185
3186                 this->status = RAD_LISTEN_STATUS_KNOWN;
3187                 return;
3188         }
3189
3190         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3191                 DEBUG2(" ... closing socket %s", buffer);
3192
3193                 fr_event_fd_delete(el, 0, this->fd);
3194                 this->status = RAD_LISTEN_STATUS_FINISH;
3195
3196                 /*
3197                  *      Close the fd AFTER fixing up the requests and
3198                  *      listeners, so that they don't send/recv on the
3199                  *      wrong socket (if someone manages to open
3200                  *      another one).
3201                  */
3202                 close(this->fd);
3203                 this->fd = -1;
3204         }
3205 }
3206
3207 static void handle_signal_self(int flag)
3208 {
3209         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3210                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3211                         fr_event_loop_exit(el, 1);
3212                 } else {
3213                         fr_event_loop_exit(el, 2);
3214                 }
3215
3216                 return;
3217         } /* else exit/term flags weren't set */
3218
3219         /*
3220          *      Tell the even loop to stop processing.
3221          */
3222         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3223                 time_t when;
3224                 static time_t last_hup = 0;
3225
3226                 DEBUG("Received HUP signal.");
3227
3228                 when = time(NULL);
3229                 if ((int) (when - last_hup) < 5) {
3230                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3231                         return;
3232                 }
3233                 last_hup = when;
3234
3235                 fr_event_loop_exit(el, 0x80);
3236         }
3237
3238 #ifdef WITH_DETAIL
3239         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3240                 rad_listen_t *this;
3241
3242                 /*
3243                  *      FIXME: O(N) loops suck.
3244                  */
3245                 for (this = mainconfig.listen;
3246                      this != NULL;
3247                      this = this->next) {
3248                         if (this->type != RAD_LISTEN_DETAIL) continue;
3249
3250                         /*
3251                          *      This one didn't send the signal, skip
3252                          *      it.
3253                          */
3254                         if (!this->decode(this, NULL)) continue;
3255
3256                         /*
3257                          *      Go service the interrupt.
3258                          */
3259                         event_poll_detail(this);
3260                 }
3261         }
3262 #endif
3263
3264         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3265                 rad_listen_t *this;
3266
3267                 for (this = mainconfig.listen;
3268                      this != NULL;
3269                      this = this->next) {
3270                         event_new_fd(this);
3271                 }
3272         }
3273 }
3274
3275 #ifndef WITH_SELF_PIPE
3276 void radius_signal_self(int flag)
3277 {
3278         handle_signal_self(flag);
3279 }
3280 #else
3281 /*
3282  *      Inform ourselves that we received a signal.
3283  */
3284 void radius_signal_self(int flag)
3285 {
3286         ssize_t rcode;
3287         uint8_t buffer[16];
3288
3289         /*
3290          *      The read MUST be non-blocking for this to work.
3291          */
3292         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3293         if (rcode > 0) {
3294                 ssize_t i;
3295
3296                 for (i = 0; i < rcode; i++) {
3297                         buffer[0] |= buffer[i];
3298                 }
3299         } else {
3300                 buffer[0] = 0;
3301         }
3302
3303         buffer[0] |= flag;
3304
3305         write(self_pipe[1], buffer, 1);
3306 }
3307
3308
3309 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3310                                  UNUSED int fd, UNUSED void *ctx)
3311 {
3312         ssize_t i, rcode;
3313         uint8_t buffer[32];
3314
3315         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3316         if (rcode <= 0) return;
3317
3318         /*
3319          *      Merge pending signals.
3320          */
3321         for (i = 0; i < rcode; i++) {
3322                 buffer[0] |= buffer[i];
3323         }
3324
3325         handle_signal_self(buffer[0]);
3326 }
3327 #endif
3328
3329
3330 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3331                                  void *ctx)
3332 {
3333         rad_listen_t *listener = ctx;
3334         RAD_REQUEST_FUNP fun;
3335         REQUEST *request;
3336
3337         rad_assert(xel == el);
3338
3339         xel = xel;
3340
3341         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3342
3343         if (!listener->recv(listener, &fun, &request)) return;
3344
3345         if (!thread_pool_addrequest(request, fun)) {
3346                 request->child_state = REQUEST_DONE;
3347         }
3348 }
3349
3350 typedef struct listen_detail_t {
3351         fr_event_t      *ev;
3352 } listen_detail_t;
3353
3354 /*
3355  *      This function is called periodically to see if this detail
3356  *      file is available for reading.
3357  */
3358 static void event_poll_detail(void *ctx)
3359 {
3360         int rcode, delay;
3361         RAD_REQUEST_FUNP fun;
3362         REQUEST *request;
3363         rad_listen_t *this = ctx;
3364         struct timeval when;
3365         listen_detail_t *detail = this->data;
3366
3367         rad_assert(this->type == RAD_LISTEN_DETAIL);
3368
3369         /*
3370          *      Try to read something.
3371          *
3372          *      FIXME: This does poll AND receive.
3373          */
3374         rcode = this->recv(this, &fun, &request);
3375         if (rcode != 0) {
3376                 rad_assert(fun != NULL);
3377                 rad_assert(request != NULL);
3378
3379                 if (!thread_pool_addrequest(request, fun)) {
3380                         request->child_state = REQUEST_DONE;
3381                 }
3382         }
3383
3384         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3385         when = now;
3386
3387         /*
3388          *      Backdoor API to get the delay until the next poll time.
3389          */
3390         delay = this->encode(this, NULL);
3391         tv_add(&when, delay);
3392
3393         if (!fr_event_insert(el, event_poll_detail, this,
3394                              &when, &detail->ev)) {
3395                 radlog(L_ERR, "Failed creating handler");
3396                 exit(1);
3397         }
3398 }
3399
3400
3401 static void event_status(struct timeval *wake)
3402 {
3403 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3404         int argval;
3405 #endif
3406
3407         if (debug_flag == 0) {
3408                 if (just_started) {
3409                         radlog(L_INFO, "Ready to process requests.");
3410                         just_started = FALSE;
3411                 }
3412                 return;
3413         }
3414
3415         if (!wake) {
3416                 DEBUG("Ready to process requests.");
3417
3418         } else if ((wake->tv_sec != 0) ||
3419                    (wake->tv_usec >= 100000)) {
3420                 DEBUG("Waking up in %d.%01u seconds.",
3421                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3422         }
3423
3424
3425         /*
3426          *      FIXME: Put this somewhere else, where it isn't called
3427          *      all of the time...
3428          */
3429
3430 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3431         /*
3432          *      If there are no child threads, then there may
3433          *      be child processes.  In that case, wait for
3434          *      their exit status, and throw that exit status
3435          *      away.  This helps get rid of zxombie children.
3436          */
3437         while (waitpid(-1, &argval, WNOHANG) > 0) {
3438                 /* do nothing */
3439         }
3440 #endif
3441
3442 }
3443
3444 /*
3445  *      Externally-visibly functions.
3446  */
3447 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3448 {
3449         rad_listen_t *this, *head = NULL;
3450
3451         if (el) return 0;
3452
3453         time(&fr_start_time);
3454
3455         el = fr_event_list_create(event_status);
3456         if (!el) return 0;
3457
3458         pl = fr_packet_list_create(0);
3459         if (!pl) return 0;      /* leak el */
3460
3461         request_num_counter = 0;
3462
3463         /*
3464          *      Move all of the thread calls to this file?
3465          *
3466          *      It may be best for the mutexes to be in this file...
3467          */
3468         have_children = spawn_flag;
3469
3470 #ifdef WITH_PROXY
3471         if (mainconfig.proxy_requests) {
3472                 pthread_mutexattr_t attr;
3473
3474                 /*
3475                  *      Create the tree for managing proxied requests and
3476                  *      responses.
3477                  */
3478                 proxy_list = fr_packet_list_create(1);
3479                 if (!proxy_list) return 0;
3480
3481 #ifdef HAVE_PTHREAD_H
3482                 pthread_mutexattr_init(&attr);
3483
3484 #ifdef PTHREAD_MUTEX_RECURSIVE
3485                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3486                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3487                                strerror(errno));
3488                         exit(1);
3489                 }
3490 #endif
3491
3492                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3493                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3494                                strerror(errno));
3495                         exit(1);
3496                 }
3497
3498                 pthread_mutexattr_destroy(&attr);
3499 #endif
3500         }
3501 #endif
3502
3503         /*
3504          *      Just before we spawn the child threads, force the log
3505          *      subsystem to re-open the log file for every write.
3506          */
3507         if (spawn_flag) force_log_reopen();
3508
3509 #ifdef HAVE_PTHREAD_H
3510 #ifndef __MINGW32__
3511         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3512 #else
3513         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3514 #endif
3515         if (thread_pool_init(cs, spawn_flag) < 0) {
3516                 exit(1);
3517         }
3518 #endif
3519
3520         if (check_config) {
3521                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3522                        mainconfig.name);
3523                 return 1;
3524         }
3525
3526 #ifdef WITH_SELF_PIPE
3527         /*
3528          *      Child threads need a pipe to signal us, as do the
3529          *      signal handlers.
3530          */
3531         if (pipe(self_pipe) < 0) {
3532                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3533                        strerror(errno));
3534                 exit(1);
3535         }
3536         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3537                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3538                        strerror(errno));
3539                 exit(1);
3540         }
3541         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3542                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3543                        strerror(errno));
3544                 exit(1);
3545         }
3546
3547         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3548                                   event_signal_handler, el)) {
3549                 radlog(L_ERR, "Failed creating handler for signals");
3550                 exit(1);
3551         }
3552 #endif  /* WITH_SELF_PIPE */
3553
3554 #ifdef WITH_PROXY
3555         /*
3556          *      Mark the proxy Fd's as unused.
3557          */
3558         {
3559                 int i;
3560
3561                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3562         }
3563 #endif
3564
3565        DEBUG("%s: #### Opening IP addresses and Ports ####",
3566                mainconfig.name);
3567
3568        /*
3569         *       The server temporarily switches to an unprivileged
3570         *       user very early in the bootstrapping process.
3571         *       However, some sockets MAY require privileged access
3572         *       (bind to device, or to port < 1024, or to raw
3573         *       sockets).  Those sockets need to call suid up/down
3574         *       themselves around the functions that need a privileged
3575         *       uid.
3576         */
3577         if (listen_init(cs, &head) < 0) {
3578                 _exit(1);
3579         }
3580
3581         /*
3582          *      At this point, no one has any business *ever* going
3583          *      back to root uid.
3584          */
3585         fr_suid_down_permanent();
3586
3587         /*
3588          *      Add all of the sockets to the event loop.
3589          */
3590         for (this = head;
3591              this != NULL;
3592              this = this->next) {
3593                 char buffer[256];
3594
3595                 this->print(this, buffer, sizeof(buffer));
3596
3597                 switch (this->type) {
3598 #ifdef WITH_DETAIL
3599                 case RAD_LISTEN_DETAIL:
3600                         DEBUG("Listening on %s", buffer);
3601
3602                         /*
3603                          *      Detail files are always known, and aren't
3604                          *      put into the socket event loop.
3605                          */
3606                         this->status = RAD_LISTEN_STATUS_KNOWN;
3607
3608                         /*
3609                          *      Set up the first poll interval.
3610                          */
3611                         event_poll_detail(this);
3612                         break;
3613 #endif
3614
3615 #ifdef WITH_PROXY
3616                 case RAD_LISTEN_PROXY:
3617                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3618                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3619
3620                         proxy_fds[this->fd & 0x1f] = this->fd;
3621                         proxy_listeners[this->fd & 0x1f] = this;
3622                         if (!fr_packet_list_socket_add(proxy_list,
3623                                                          this->fd)) {
3624                                 rad_assert(0 == 1);
3625                         }
3626                         /* FALL-THROUGH */
3627 #endif
3628
3629                 default:
3630                         break;
3631                 }
3632
3633                 event_new_fd(this);
3634         }
3635
3636         mainconfig.listen = head;
3637
3638         return 1;
3639 }
3640
3641
3642 static int request_hash_cb(UNUSED void *ctx, void *data)
3643 {
3644         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3645
3646 #ifdef WITH_PROXY
3647         rad_assert(request->in_proxy_hash == FALSE);
3648 #endif
3649
3650         ev_request_free(&request);
3651
3652         return 0;
3653 }
3654
3655
3656 #ifdef WITH_PROXY
3657 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3658 {
3659         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3660
3661         ev_request_free(&request);
3662
3663         return 0;
3664 }
3665 #endif
3666
3667 void radius_event_free(void)
3668 {
3669         /*
3670          *      FIXME: Stop all threads, or at least check that
3671          *      they're all waiting on the semaphore, and the queues
3672          *      are empty.
3673          */
3674
3675 #ifdef WITH_PROXY
3676         /*
3677          *      There are requests in the proxy hash that aren't
3678          *      referenced from anywhere else.  Remove them first.
3679          */
3680         if (proxy_list) {
3681                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3682                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3683                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3684                 fr_packet_list_free(proxy_list);
3685                 proxy_list = NULL;
3686         }
3687 #endif
3688
3689         fr_packet_list_walk(pl, NULL, request_hash_cb);
3690
3691         fr_packet_list_free(pl);
3692         pl = NULL;
3693
3694         fr_event_list_free(el);
3695 }
3696
3697 int radius_event_process(void)
3698 {
3699         if (!el) return 0;
3700
3701         return fr_event_loop(el);
3702 }
3703
3704 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3705 {
3706         request->options = RAD_REQUEST_OPTION_DEBUG2;
3707
3708         if (request_pre_handler(request)) {
3709                 rad_assert(fun != NULL);
3710                 rad_assert(request != NULL);
3711
3712                 if (request->server) RDEBUG("server %s {",
3713                                             request->server != NULL ?
3714                                             request->server : "");
3715                 fun(request);
3716
3717                 if (request->server) RDEBUG("} # server %s",
3718                                              request->server != NULL ?
3719                                             request->server : "");
3720
3721                 request_post_handler(request);
3722         }
3723
3724         DEBUG2("Going to the next request");
3725         return;
3726 }