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 code %d from internal virtual server.", fake->reply->code);
1954
1955         if (fake->reply->code != 0) {
1956                 request->proxy_reply = fake->reply;
1957                 fake->reply = NULL;
1958         } else {
1959                 /*
1960                  *      There was no response
1961                  */
1962                 setup_post_proxy_fail(request);
1963         }
1964
1965         ev_request_free(&fake);
1966
1967         process_proxy_reply(request);
1968
1969         /*
1970          *      Process it through the normal section again, but ONLY
1971          *      if we received a proxy reply..
1972          */
1973         if (!request->proxy_reply) {
1974                 if (request->server) RDEBUG("server %s {",
1975                                             request->server != NULL ?
1976                                             request->server : "");
1977                 fun(request);
1978
1979                 if (request->server) RDEBUG("} # server %s",
1980                                             request->server != NULL ?
1981                                             request->server : "");
1982         }
1983
1984         return 2;               /* success, but NOT '1' !*/
1985 }
1986
1987 /*
1988  *      Return 1 if we did proxy it, or the proxy attempt failed
1989  *      completely.  Either way, the caller doesn't touch the request
1990  *      any more if we return 1.
1991  */
1992 static int successfully_proxied_request(REQUEST *request)
1993 {
1994         int rcode;
1995         int pre_proxy_type = 0;
1996         VALUE_PAIR *realmpair;
1997         VALUE_PAIR *strippedname;
1998         VALUE_PAIR *vp;
1999         char *realmname = NULL;
2000         home_server *home;
2001         REALM *realm = NULL;
2002         home_pool_t *pool;
2003
2004         /*
2005          *      If it was already proxied, do nothing.
2006          *
2007          *      FIXME: This should really be a serious error.
2008          */
2009         if (request->in_proxy_hash ||
2010             (request->proxy_reply && (request->proxy_reply->code != 0))) {
2011                 return 0;
2012         }
2013
2014         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2015         if (!realmpair || (realmpair->length == 0)) {
2016                 int pool_type;
2017
2018                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2019                 if (!vp) return 0;
2020
2021                 switch (request->packet->code) {
2022                 case PW_AUTHENTICATION_REQUEST:
2023                         pool_type = HOME_TYPE_AUTH;
2024                         break;
2025
2026 #ifdef WITH_ACCOUNTING
2027                 case PW_ACCOUNTING_REQUEST:
2028                         pool_type = HOME_TYPE_ACCT;
2029                         break;
2030 #endif
2031
2032 #ifdef WITH_COA
2033                 case PW_COA_REQUEST:
2034                 case PW_DISCONNECT_REQUEST:
2035                         pool_type = HOME_TYPE_COA;
2036                         break;
2037 #endif
2038
2039                 default:
2040                         return 0;
2041                 }
2042
2043                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2044                 if (!pool) {
2045                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2046                                 vp->vp_strvalue);
2047                         return 0;
2048                 }
2049
2050                 realmname = NULL; /* no realms */
2051                 realm = NULL;
2052                 goto found_pool;
2053         }
2054
2055         realmname = (char *) realmpair->vp_strvalue;
2056
2057         realm = realm_find2(realmname);
2058         if (!realm) {
2059                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2060                 return 0;
2061         }
2062
2063         /*
2064          *      Figure out which pool to use.
2065          */
2066         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2067                 pool = realm->auth_pool;
2068
2069 #ifdef WITH_ACCOUNTING
2070         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2071                 pool = realm->acct_pool;
2072 #endif
2073
2074 #ifdef WITH_COA
2075         } else if ((request->packet->code == PW_COA_REQUEST) ||
2076                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2077                 pool = realm->acct_pool;
2078 #endif
2079
2080         } else {
2081                 rad_panic("Internal sanity check failed");
2082         }
2083
2084         if (!pool) {
2085                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2086                        realmname);
2087                 return 0;
2088         }
2089
2090 found_pool:
2091         home = home_server_ldb(realmname, pool, request);
2092         if (!home) {
2093                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2094                        realmname);
2095                 return -1;
2096         }
2097         request->home_pool = pool;
2098
2099 #ifdef WITH_COA
2100         /*
2101          *      Once we've decided to proxy a request, we cannot send
2102          *      a CoA packet.  So we free up any CoA packet here.
2103          */
2104         ev_request_free(&request->coa);
2105 #endif
2106         /*
2107          *      Remember that we sent the request to a Realm.
2108          */
2109         if (realmname) pairadd(&request->packet->vps,
2110                                pairmake("Realm", realmname, T_OP_EQ));
2111
2112         /*
2113          *      Strip the name, if told to.
2114          *
2115          *      Doing it here catches the case of proxied tunneled
2116          *      requests.
2117          */
2118         if (realm && (realm->striprealm == TRUE) &&
2119            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2120                 /*
2121                  *      If there's a Stripped-User-Name attribute in
2122                  *      the request, then use THAT as the User-Name
2123                  *      for the proxied request, instead of the
2124                  *      original name.
2125                  *
2126                  *      This is done by making a copy of the
2127                  *      Stripped-User-Name attribute, turning it into
2128                  *      a User-Name attribute, deleting the
2129                  *      Stripped-User-Name and User-Name attributes
2130                  *      from the vps list, and making the new
2131                  *      User-Name the head of the vps list.
2132                  */
2133                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2134                 if (!vp) {
2135                         vp = radius_paircreate(request, NULL,
2136                                                PW_USER_NAME, PW_TYPE_STRING);
2137                         rad_assert(vp != NULL); /* handled by above function */
2138                         /* Insert at the START of the list */
2139                         vp->next = request->proxy->vps;
2140                         request->proxy->vps = vp;
2141                 }
2142                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2143                        sizeof(vp->vp_strvalue));
2144                 vp->length = strippedname->length;
2145
2146                 /*
2147                  *      Do NOT delete Stripped-User-Name.
2148                  */
2149         }
2150
2151         /*
2152          *      If there is no PW_CHAP_CHALLENGE attribute but
2153          *      there is a PW_CHAP_PASSWORD we need to add it
2154          *      since we can't use the request authenticator
2155          *      anymore - we changed it.
2156          */
2157         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2158             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2159             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2160                 vp = radius_paircreate(request, &request->proxy->vps,
2161                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2162                 vp->length = AUTH_VECTOR_LEN;
2163                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2164         }
2165
2166         /*
2167          *      The RFC's say we have to do this, but FreeRADIUS
2168          *      doesn't need it.
2169          */
2170         vp = radius_paircreate(request, &request->proxy->vps,
2171                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2172         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2173                  request->packet->id);
2174         vp->length = strlen(vp->vp_strvalue);
2175
2176         /*
2177          *      Should be done BEFORE inserting into proxy hash, as
2178          *      pre-proxy may use this information, or change it.
2179          */
2180         request->proxy->code = request->packet->code;
2181
2182         /*
2183          *      Call the pre-proxy routines.
2184          */
2185         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2186         if (vp) {
2187                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2188                 pre_proxy_type = vp->vp_integer;
2189         }
2190
2191         rad_assert(request->home_pool != NULL);
2192
2193         if (request->home_pool->virtual_server) {
2194                 const char *old_server = request->server;
2195
2196                 request->server = request->home_pool->virtual_server;
2197                 RDEBUG2(" server %s {", request->server);
2198                 rcode = module_pre_proxy(pre_proxy_type, request);
2199                 RDEBUG2(" }");
2200                         request->server = old_server;
2201         } else {
2202                 rcode = module_pre_proxy(pre_proxy_type, request);
2203         }
2204         switch (rcode) {
2205         case RLM_MODULE_FAIL:
2206         case RLM_MODULE_INVALID:
2207         case RLM_MODULE_NOTFOUND:
2208         case RLM_MODULE_USERLOCK:
2209         default:
2210                 /* FIXME: debug print failed stuff */
2211                 return -1;
2212
2213         case RLM_MODULE_REJECT:
2214         case RLM_MODULE_HANDLED:
2215                 return 0;
2216
2217         /*
2218          *      Only proxy the packet if the pre-proxy code succeeded.
2219          */
2220         case RLM_MODULE_NOOP:
2221         case RLM_MODULE_OK:
2222         case RLM_MODULE_UPDATED:
2223                 break;
2224         }
2225
2226         /*
2227          *      If it's a fake request, don't send the proxy
2228          *      packet.  The outer tunnel session will take
2229          *      care of doing that.
2230          */
2231         if (request->packet->dst_port == 0) {
2232                 request->home_server = NULL;
2233                 return 1;
2234         }
2235
2236         if (request->home_server->server) {
2237                 return proxy_to_virtual_server(request);
2238         }
2239
2240         if (!proxy_request(request)) {
2241                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2242                 return -1;
2243         }
2244
2245         return 1;
2246 }
2247 #endif
2248
2249 static void request_post_handler(REQUEST *request)
2250 {
2251         int child_state = -1;
2252         struct timeval when;
2253         VALUE_PAIR *vp;
2254
2255         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2256             (request->parent &&
2257              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2258                 RDEBUG2("Request %d was cancelled.", request->number);
2259 #ifdef HAVE_PTHREAD_H
2260                 request->child_pid = NO_SUCH_CHILD_PID;
2261 #endif
2262                 child_state = REQUEST_DONE;
2263                 goto cleanup;
2264         }
2265
2266         if (request->child_state != REQUEST_RUNNING) {
2267                 rad_panic("Internal sanity check failed");
2268         }
2269
2270 #ifdef WITH_COA
2271         /*
2272          *      If it's not in the request hash, it's a CoA request.
2273          *      We hope.
2274          */
2275         if (!request->in_request_hash &&
2276             request->proxy &&
2277             ((request->proxy->code == PW_COA_REQUEST) ||
2278              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2279                 request->next_callback = NULL;
2280                 child_state = REQUEST_DONE;
2281                 goto cleanup;
2282         }
2283 #endif
2284
2285         if ((request->reply->code == 0) &&
2286             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2287             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2288                 request->reply->code = PW_AUTHENTICATION_REJECT;
2289         }
2290
2291 #ifdef WITH_PROXY
2292         if (request->root->proxy_requests &&
2293             !request->in_proxy_hash &&
2294             (request->reply->code == 0) &&
2295             (request->packet->dst_port != 0) &&
2296             (request->packet->code != PW_STATUS_SERVER)) {
2297                 int rcode = successfully_proxied_request(request);
2298
2299                 if (rcode == 1) return; /* request is invalid */
2300
2301                 /*
2302                  *      Failed proxying it (dead home servers, etc.)
2303                  *      Run it through Post-Proxy-Type = Fail, and
2304                  *      respond to the request.
2305                  *
2306                  *      Note that we're in a child thread here, so we
2307                  *      do NOT re-schedule the request.  Instead, we
2308                  *      do what we would have done, which is run the
2309                  *      pre-handler, a NULL request handler, and then
2310                  *      the post handler.
2311                  */
2312                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2313                         request_pre_handler(request);
2314                 }
2315
2316                 /*
2317                  *      Else we weren't supposed to proxy it,
2318                  *      OR we proxied it internally to a virutal server.
2319                  */
2320         }
2321 #endif
2322
2323         /*
2324          *      Fake requests don't get encoded or signed.  The caller
2325          *      also requires the reply VP's, so we don't free them
2326          *      here!
2327          */
2328         if (request->packet->dst_port == 0) {
2329                 /* FIXME: RDEBUG going to the next request */
2330 #ifdef HAVE_PTHREAD_H
2331                 request->child_pid = NO_SUCH_CHILD_PID;
2332 #endif
2333                 request->child_state = REQUEST_DONE;
2334                 return;
2335         }
2336
2337 #ifdef WITH_PROXY
2338         /*
2339          *      Copy Proxy-State from the request to the reply.
2340          */
2341         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2342         if (vp) pairadd(&request->reply->vps, vp);
2343 #endif
2344
2345         /*
2346          *      Access-Requests get delayed or cached.
2347          */
2348         switch (request->packet->code) {
2349         case PW_AUTHENTICATION_REQUEST:
2350                 gettimeofday(&request->next_when, NULL);
2351
2352                 if (request->reply->code == 0) {
2353                         /*
2354                          *      Check if the lack of response is intentional.
2355                          */
2356                         vp = pairfind(request->config_items,
2357                                       PW_RESPONSE_PACKET_TYPE);
2358                         if (!vp) {
2359                                 RDEBUG2("There was no response configured: rejecting request %d",
2360                                        request->number);
2361                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2362
2363                         } else if (vp->vp_integer == 256) {
2364                                 RDEBUG2("Not responding to request %d",
2365                                        request->number);
2366
2367                                 /*
2368                                  *      Force cleanup after a long
2369                                  *      time, so that we don't
2370                                  *      re-process the packet.
2371                                  */
2372                                 request->next_when.tv_sec += request->root->max_request_time;
2373                                 request->next_callback = cleanup_delay;
2374                                 child_state = REQUEST_CLEANUP_DELAY;
2375                                 break;
2376                         } else {
2377                                 request->reply->code = vp->vp_integer;
2378
2379                         }
2380                 }
2381
2382                 /*
2383                  *      Run rejected packets through
2384                  *
2385                  *      Post-Auth-Type = Reject
2386                  */
2387                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2388                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2389                         vp = radius_pairmake(request, &request->config_items,
2390                                              "Post-Auth-Type", "Reject",
2391                                              T_OP_SET);
2392                         if (vp) rad_postauth(request);
2393
2394                         /*
2395                          *      If configured, delay Access-Reject packets.
2396                          *
2397                          *      If request->root->reject_delay = 0, we discover
2398                          *      that we have to send the packet now.
2399                          */
2400                         when = request->received;
2401                         when.tv_sec += request->root->reject_delay;
2402
2403                         if (timercmp(&when, &request->next_when, >)) {
2404                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2405                                        request->number,
2406                                        request->root->reject_delay);
2407                                 request->next_when = when;
2408                                 request->next_callback = reject_delay;
2409 #ifdef HAVE_PTHREAD_H
2410                                 request->child_pid = NO_SUCH_CHILD_PID;
2411 #endif
2412                                 request->child_state = REQUEST_REJECT_DELAY;
2413                                 return;
2414                         }
2415                 }
2416
2417 #ifdef WITH_COA
2418         case PW_COA_REQUEST:
2419         case PW_DISCONNECT_REQUEST:
2420 #endif
2421                 request->next_when.tv_sec += request->root->cleanup_delay;
2422                 request->next_callback = cleanup_delay;
2423                 child_state = REQUEST_CLEANUP_DELAY;
2424                 break;
2425
2426         case PW_ACCOUNTING_REQUEST:
2427                 request->next_callback = NULL; /* just to be safe */
2428                 child_state = REQUEST_DONE;
2429                 break;
2430
2431                 /*
2432                  *      FIXME: Status-Server should probably not be
2433                  *      handled here...
2434                  */
2435         case PW_STATUS_SERVER:
2436                 request->next_callback = NULL;
2437                 child_state = REQUEST_DONE;
2438                 break;
2439
2440         default:
2441                 if ((request->packet->code > 1024) &&
2442                     (request->packet->code < (1024 + 254 + 1))) {
2443                         request->next_callback = NULL;
2444                         child_state = REQUEST_DONE;
2445                         break;
2446                 }
2447
2448                 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2449                 request->next_callback = NULL;
2450                 child_state = REQUEST_DONE;
2451                 break;
2452         }
2453
2454         /*
2455          *      Suppress "no reply" packets here, unless we're reading
2456          *      from the "detail" file.  In that case, we've got to
2457          *      tell the detail file handler that the request is dead,
2458          *      and it should re-send it.
2459          *      If configured, encode, sign, and send.
2460          */
2461         if ((request->reply->code != 0) ||
2462             (request->listener->type == RAD_LISTEN_DETAIL)) {
2463                 DEBUG_PACKET(request, request->reply, 1);
2464                 request->listener->send(request->listener, request);
2465         }
2466
2467 #ifdef WITH_COA
2468         /*
2469          *      Now that we've completely processed the request,
2470          *      see if we need to originate a CoA request.
2471          */
2472         if (request->coa ||
2473             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2474                 if (!originated_coa_request(request)) {
2475                         RDEBUG2("Do CoA Fail handler here");
2476                 }
2477                 /* request->coa is stil set, so we can update events */
2478         }
2479 #endif
2480
2481  cleanup:
2482         /*
2483          *      Clean up.  These are no longer needed.
2484          */
2485         pairfree(&request->config_items);
2486
2487         pairfree(&request->packet->vps);
2488         request->username = NULL;
2489         request->password = NULL;
2490
2491         pairfree(&request->reply->vps);
2492
2493 #ifdef WITH_PROXY
2494         if (request->proxy) {
2495                 pairfree(&request->proxy->vps);
2496
2497                 if (request->proxy_reply) {
2498                         pairfree(&request->proxy_reply->vps);
2499                 }
2500
2501 #if 0
2502                 /*
2503                  *      We're not tracking responses from the home
2504                  *      server, we can therefore free this memory in
2505                  *      the child thread.
2506                  */
2507                 if (!request->in_proxy_hash) {
2508                         rad_free(&request->proxy);
2509                         rad_free(&request->proxy_reply);
2510                         request->home_server = NULL;
2511                 }
2512 #endif
2513         }
2514 #endif
2515
2516         RDEBUG2("Finished request %d.", request->number);
2517         rad_assert(child_state >= 0);
2518         request->child_state = child_state;
2519
2520         /*
2521          *      Single threaded mode: update timers now.
2522          */
2523         if (!have_children) wait_a_bit(request);
2524 }
2525
2526
2527 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2528 {
2529 #ifdef WITH_PROXY
2530         char buffer[128];
2531 #endif
2532
2533         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2534         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2535
2536         switch (request->child_state) {
2537         case REQUEST_QUEUED:
2538         case REQUEST_RUNNING:
2539 #ifdef WITH_PROXY
2540         discard:
2541 #endif
2542                 radlog(L_ERR, "Discarding duplicate request from "
2543                        "client %s port %d - ID: %d due to unfinished request %d",
2544                        client->shortname,
2545                        request->packet->src_port,request->packet->id,
2546                        request->number);
2547                 break;
2548
2549 #ifdef WITH_PROXY
2550         case REQUEST_PROXIED:
2551                 /*
2552                  *      We're not supposed to have duplicate
2553                  *      accounting packets.  The other states handle
2554                  *      duplicates fine (discard, or send duplicate
2555                  *      reply).  But we do NOT want to retransmit an
2556                  *      accounting request here, because that would
2557                  *      involve updating the Acct-Delay-Time, and
2558                  *      therefore changing the packet Id, etc.
2559                  *
2560                  *      Instead, we just discard the packet.  We may
2561                  *      eventually respond, or the client will send a
2562                  *      new accounting packet.
2563                  *
2564                  *      The same comments go for Status-Server, and
2565                  *      other packet types.
2566                  *
2567                  *      FIXME: coa: when we proxy CoA && Disconnect
2568                  *      packets, this logic has to be fixed.
2569                  */
2570                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2571                         goto discard;
2572                 }
2573
2574                 check_for_zombie_home_server(request);
2575
2576                 /*
2577                  *      If we've just discovered that the home server is
2578                  *      dead, send the packet to another one.
2579                  */
2580                 if ((request->packet->dst_port != 0) &&
2581                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2582                         home_server *home;
2583
2584                         remove_from_proxy_hash(request);
2585
2586                         home = home_server_ldb(NULL, request->home_pool, request);
2587                         if (!home) {
2588                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2589                         no_home_servers:
2590                                 /*
2591                                  *      Do post-request processing,
2592                                  *      and any insertion of necessary
2593                                  *      events.
2594                                  */
2595                                 post_proxy_fail_handler(request);
2596                                 return;
2597                         }
2598
2599                         request->proxy->code = request->packet->code;
2600
2601                         /*
2602                          *      Free the old packet, to force re-encoding
2603                          */
2604                         free(request->proxy->data);
2605                         request->proxy->data = NULL;
2606                         request->proxy->data_len = 0;
2607
2608                         /*
2609                          *      This request failed over to a virtual
2610                          *      server.  Push it back onto the queue
2611                          *      to be processed.
2612                          */
2613                         if (request->home_server->server) {
2614                                 proxy_fallback_handler(request);
2615                                 return;
2616                         }
2617
2618                         /*
2619                          *      Try to proxy the request.
2620                          */
2621                         if (!proxy_request(request)) {
2622                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2623                                 goto no_home_servers;
2624                         }
2625
2626                         /*
2627                          *      This code executes in the main server
2628                          *      thread, so there's no need for locking.
2629                          */
2630                         rad_assert(request->next_callback != NULL);
2631                         INSERT_EVENT(request->next_callback, request);
2632                         request->next_callback = NULL;
2633                         return;
2634                 } /* else the home server is still alive */
2635
2636                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2637                        inet_ntop(request->proxy->dst_ipaddr.af,
2638                                  &request->proxy->dst_ipaddr.ipaddr,
2639                                  buffer, sizeof(buffer)),
2640                        request->proxy->dst_port,
2641                        request->proxy->id);
2642                 request->num_proxied_requests++;
2643
2644                 DEBUG_PACKET(request, request->proxy, 1);
2645                 request->proxy_listener->send(request->proxy_listener,
2646                                               request);
2647                 break;
2648 #endif
2649
2650         case REQUEST_REJECT_DELAY:
2651                 RDEBUG2("Waiting to send Access-Reject "
2652                        "to client %s port %d - ID: %d",
2653                        client->shortname,
2654                        request->packet->src_port, request->packet->id);
2655                 break;
2656
2657         case REQUEST_CLEANUP_DELAY:
2658         case REQUEST_DONE:
2659                 if (request->reply->code == 0) {
2660                         RDEBUG2("Ignoring retransmit from client %s port %d "
2661                                 "- ID: %d, no reply was configured",
2662                                 client->shortname,
2663                                 request->packet->src_port, request->packet->id);
2664                         return;
2665                 }
2666
2667                 /*
2668                  *      FIXME: This sends duplicate replies to
2669                  *      accounting requests, even if Acct-Delay-Time
2670                  *      or Event-Timestamp is in the packet.  In those
2671                  *      cases, the Id should be changed, and the packet
2672                  *      re-calculated.
2673                  */
2674                 RDEBUG2("Sending duplicate reply "
2675                        "to client %s port %d - ID: %d",
2676                        client->shortname,
2677                        request->packet->src_port, request->packet->id);
2678                 DEBUG_PACKET(request, request->reply, 1);
2679                 request->listener->send(request->listener, request);
2680                 break;
2681         }
2682 }
2683
2684
2685 static void received_conflicting_request(REQUEST *request,
2686                                          const RADCLIENT *client)
2687 {
2688         radlog(L_ERR, "Received conflicting packet from "
2689                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2690                client->shortname,
2691                request->packet->src_port, request->packet->id,
2692                request->number);
2693
2694         /*
2695          *      Nuke it from the request hash, so we can receive new
2696          *      packets.
2697          */
2698         remove_from_request_hash(request);
2699
2700         switch (request->child_state) {
2701 #ifdef HAVE_PTHREAD_H
2702                 /*
2703                  *      It's queued or running.  Tell it to stop, and
2704                  *      wait for it to do so.
2705                  */
2706         case REQUEST_QUEUED:
2707         case REQUEST_RUNNING:
2708                 request->master_state = REQUEST_STOP_PROCESSING;
2709                 request->delay += request->delay >> 1;
2710
2711                 tv_add(&request->when, request->delay);
2712
2713                 INSERT_EVENT(wait_for_child_to_die, request);
2714                 return;
2715 #endif
2716
2717                 /*
2718                  *      It's in some other state, and therefore also
2719                  *      in the event queue.  At some point, the
2720                  *      child will notice, and we can then delete it.
2721                  */
2722         default:
2723                 rad_assert(request->ev != NULL);
2724                 break;
2725         }
2726 }
2727
2728
2729 static int can_handle_new_request(RADIUS_PACKET *packet,
2730                                   RADCLIENT *client,
2731                                   struct main_config_t *root)
2732 {
2733         /*
2734          *      Count the total number of requests, to see if
2735          *      there are too many.  If so, return with an
2736          *      error.
2737          */
2738         if (root->max_requests) {
2739                 int request_count = fr_packet_list_num_elements(pl);
2740
2741                 /*
2742                  *      This is a new request.  Let's see if
2743                  *      it makes us go over our configured
2744                  *      bounds.
2745                  */
2746                 if (request_count > root->max_requests) {
2747                         radlog(L_ERR, "Dropping request (%d is too many): "
2748                                "from client %s port %d - ID: %d", request_count,
2749                                client->shortname,
2750                                packet->src_port, packet->id);
2751                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2752                                "\tThe value for 'max_requests' is probably set too low.\n");
2753                         return 0;
2754                 } /* else there were a small number of requests */
2755         } /* else there was no configured limit for requests */
2756
2757         /*
2758          *      FIXME: Add per-client checks.  If one client is sending
2759          *      too many packets, start discarding them.
2760          *
2761          *      We increment the counters here, and decrement them
2762          *      when the response is sent... somewhere in this file.
2763          */
2764
2765         /*
2766          *      FUTURE: Add checks for system load.  If the system is
2767          *      busy, start dropping requests...
2768          *
2769          *      We can probably keep some statistics ourselves...  if
2770          *      there are more requests coming in than we can handle,
2771          *      start dropping some.
2772          */
2773
2774         return 1;
2775 }
2776
2777
2778 int received_request(rad_listen_t *listener,
2779                      RADIUS_PACKET *packet, REQUEST **prequest,
2780                      RADCLIENT *client)
2781 {
2782         RADIUS_PACKET **packet_p;
2783         REQUEST *request = NULL;
2784         struct main_config_t *root = &mainconfig;
2785
2786         packet_p = fr_packet_list_find(pl, packet);
2787         if (packet_p) {
2788                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2789                 rad_assert(request->in_request_hash);
2790
2791                 if ((request->packet->data_len == packet->data_len) &&
2792                     (memcmp(request->packet->vector, packet->vector,
2793                             sizeof(packet->vector)) == 0)) {
2794                         received_retransmit(request, client);
2795                         return 0;
2796                 }
2797
2798                 /*
2799                  *      The new request is different from the old one,
2800                  *      but maybe the old is finished.  If so, delete
2801                  *      the old one.
2802                  */
2803                 switch (request->child_state) {
2804                         struct timeval when;
2805
2806                 default:
2807                         /*
2808                          *      Special hacks for race conditions.
2809                          *      The reply is encoded, and therefore
2810                          *      likely sent.  We received a *new*
2811                          *      packet from the client, likely before
2812                          *      the next line or two of code which
2813                          *      updated the child state.  In this
2814                          *      case, just accept the new request.
2815                          */
2816                         if ((request->reply->code != 0) &&
2817                             request->reply->data) {
2818                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2819                                        client->shortname,
2820                                        packet->src_port, packet->id,
2821                                        request->number);
2822                                 remove_from_request_hash(request);
2823                                 request = NULL;
2824                                 break;
2825                         }
2826
2827                         gettimeofday(&when, NULL);
2828                         when.tv_sec -= 1;
2829
2830                         /*
2831                          *      If the cached request was received
2832                          *      within the last second, then we
2833                          *      discard the NEW request instead of the
2834                          *      old one.  This will happen ONLY when
2835                          *      the client is severely broken, and is
2836                          *      sending conflicting packets very
2837                          *      quickly.
2838                          */
2839                         if (timercmp(&when, &request->received, <)) {
2840                                 radlog(L_ERR, "Discarding conflicting packet from "
2841                                        "client %s port %d - ID: %d due to recent request %d.",
2842                                        client->shortname,
2843                                        packet->src_port, packet->id,
2844                                        request->number);
2845                                 return 0;
2846                         }
2847
2848                         received_conflicting_request(request, client);
2849                         request = NULL;
2850                         break;
2851
2852                 case REQUEST_REJECT_DELAY:
2853                 case REQUEST_CLEANUP_DELAY:
2854                         request->child_state = REQUEST_DONE;
2855                 case REQUEST_DONE:
2856                         cleanup_delay(request);
2857                         request = NULL;
2858                         break;
2859                 }
2860         }
2861
2862         /*
2863          *      We may want to quench the new request.
2864          */
2865         if ((listener->type != RAD_LISTEN_DETAIL) &&
2866             !can_handle_new_request(packet, client, root)) {
2867                 return 0;
2868         }
2869
2870         /*
2871          *      Create and initialize the new request.
2872          */
2873         request = request_alloc(); /* never fails */
2874
2875         if ((request->reply = rad_alloc(0)) == NULL) {
2876                 radlog(L_ERR, "No memory");
2877                 exit(1);
2878         }
2879
2880         request->listener = listener;
2881         request->client = client;
2882         request->packet = packet;
2883         request->packet->timestamp = request->timestamp;
2884         request->number = request_num_counter++;
2885         request->priority = listener->type;
2886 #ifdef HAVE_PTHREAD_H
2887         request->child_pid = NO_SUCH_CHILD_PID;
2888 #endif
2889
2890         /*
2891          *      Status-Server packets go to the head of the queue.
2892          */
2893         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2894
2895         /*
2896          *      Set virtual server identity
2897          */
2898         if (client->server) {
2899                 request->server = client->server;
2900         } else if (listener->server) {
2901                 request->server = listener->server;
2902         } else {
2903                 request->server = NULL;
2904         }
2905
2906         /*
2907          *      Remember the request in the list.
2908          */
2909         if (!fr_packet_list_insert(pl, &request->packet)) {
2910                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2911                 ev_request_free(&request);
2912                 return 0;
2913         }
2914
2915         request->in_request_hash = TRUE;
2916         request->root = root;
2917         root->refcount++;
2918
2919         /*
2920          *      The request passes many of our sanity checks.
2921          *      From here on in, if anything goes wrong, we
2922          *      send a reject message, instead of dropping the
2923          *      packet.
2924          */
2925
2926         /*
2927          *      Build the reply template from the request.
2928          */
2929
2930         request->reply->sockfd = request->packet->sockfd;
2931         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2932         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2933         request->reply->dst_port = request->packet->src_port;
2934         request->reply->src_port = request->packet->dst_port;
2935         request->reply->id = request->packet->id;
2936         request->reply->code = 0; /* UNKNOWN code */
2937         memcpy(request->reply->vector, request->packet->vector,
2938                sizeof(request->reply->vector));
2939         request->reply->vps = NULL;
2940         request->reply->data = NULL;
2941         request->reply->data_len = 0;
2942
2943         request->master_state = REQUEST_ACTIVE;
2944         request->child_state = REQUEST_QUEUED;
2945         request->next_callback = NULL;
2946
2947         gettimeofday(&request->received, NULL);
2948         request->timestamp = request->received.tv_sec;
2949         request->when = request->received;
2950
2951         request->delay = USEC;
2952
2953         tv_add(&request->when, request->delay);
2954
2955         INSERT_EVENT(wait_a_bit, request);
2956
2957         *prequest = request;
2958         return 1;
2959 }
2960
2961
2962 #ifdef WITH_PROXY
2963 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2964 {
2965         char            buffer[128];
2966         REQUEST         *request;
2967
2968         /*
2969          *      Also removes from the proxy hash if responses == requests
2970          */
2971         request = lookup_in_proxy_hash(packet);
2972
2973         if (!request) {
2974                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2975                        inet_ntop(packet->src_ipaddr.af,
2976                                  &packet->src_ipaddr.ipaddr,
2977                                  buffer, sizeof(buffer)),
2978                        packet->src_port, packet->id);
2979                 return NULL;
2980         }
2981
2982         /*
2983          *      We haven't replied to the NAS, but we have seen an
2984          *      earlier reply from the home server.  Ignore this packet,
2985          *      as we're likely still processing the previous reply.
2986          */
2987         if (request->proxy_reply) {
2988                 if (memcmp(request->proxy_reply->vector,
2989                            packet->vector,
2990                            sizeof(request->proxy_reply->vector)) == 0) {
2991                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
2992                                inet_ntop(packet->src_ipaddr.af,
2993                                          &packet->src_ipaddr.ipaddr,
2994                                          buffer, sizeof(buffer)),
2995                                packet->src_port, packet->id,
2996                                request->number);
2997                 } else {
2998                         /*
2999                          *      ? The home server gave us a new proxy
3000                          *      reply which doesn't match the old
3001                          *      one.  Delete it.
3002                          */
3003                         RDEBUG2("Ignoring conflicting proxy reply");
3004                 }
3005
3006                 /* assert that there's an event queued for request? */
3007                 return NULL;
3008         }
3009
3010         /*
3011          *      Verify the packet before doing ANYTHING with it.  This
3012          *      means we're doing more MD5 checks in the server core.
3013          *      However, we can fix that by moving to multiple threads
3014          *      listening on sockets.
3015          *
3016          *      We do this AFTER looking the request up in the hash,
3017          *      and AFTER vhecking if we saw a previous request.  This
3018          *      helps minimize the DoS effect of people attacking us
3019          *      with spoofed packets.
3020          */
3021         if (rad_verify(packet, request->proxy,
3022                        request->home_server->secret) != 0) {
3023                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3024                 return NULL;
3025         }
3026
3027         gettimeofday(&now, NULL);
3028
3029         /*
3030          *      Maybe move this earlier in the decision process?
3031          *      Having it here means that late or duplicate proxy
3032          *      replies no longer get the home server marked as
3033          *      "alive".  This might be good for stability, though.
3034          *
3035          *      FIXME: Do we really want to do this whenever we
3036          *      receive a packet?  Setting this here means that we
3037          *      mark it alive on *any* packet, even if it's lost all
3038          *      of the *other* packets in the last 10s.
3039          */
3040         request->home_server->state = HOME_STATE_ALIVE;
3041
3042 #ifdef WITH_COA
3043         /*
3044          *      When originating CoA, the "proxy" reply is the reply
3045          *      to the CoA request that we originated.  At this point,
3046          *      the original request is finished, and it has a reply.
3047          *
3048          *      However, if we haven't separated the two requests, do
3049          *      so now.  This is done so that cleaning up the original
3050          *      request won't cause the CoA request to be free'd.  See
3051          *      util.c, request_free()
3052          */
3053         if (request->parent && (request->parent->coa == request)) {
3054                 request->parent->coa = NULL;
3055                 request->parent = NULL;
3056
3057         } else
3058                 /*
3059                  *      Skip the next set of checks, as the original
3060                  *      reply is cached.  We want to be able to still
3061                  *      process the CoA reply, AND to reference the
3062                  *      original request/reply.
3063                  *
3064                  *      This is getting to be really quite a bit of a
3065                  *      hack.
3066                  */
3067 #endif
3068
3069         /*
3070          *      If there's a reply to the NAS, ignore everything
3071          *      related to proxy responses
3072          */
3073         if (request->reply && request->reply->code != 0) {
3074                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3075                 return NULL;
3076         }
3077
3078 #ifdef WITH_STATS
3079         /*
3080          *      The average includes our time to receive packets and
3081          *      look them up in the hashes, which should be the same
3082          *      for all packets.
3083          *
3084          *      We update the response time only for the FIRST packet
3085          *      we receive.
3086          */
3087         if (request->home_server->ema.window > 0) {
3088                 radius_stats_ema(&request->home_server->ema,
3089                                  &now, &request->proxy_when);
3090         }
3091 #endif
3092
3093         switch (request->child_state) {
3094         case REQUEST_QUEUED:
3095         case REQUEST_RUNNING:
3096                 radlog(L_ERR, "Internal sanity check failed for child state");
3097                 /* FALL-THROUGH */
3098
3099         case REQUEST_REJECT_DELAY:
3100         case REQUEST_CLEANUP_DELAY:
3101         case REQUEST_DONE:
3102                 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'",
3103                        inet_ntop(packet->src_ipaddr.af,
3104                                  &packet->src_ipaddr.ipaddr,
3105                                  buffer, sizeof(buffer)),
3106                        packet->src_port, packet->id,
3107                        request->number);
3108                 /* assert that there's an event queued for request? */
3109                 return NULL;
3110
3111         case REQUEST_PROXIED:
3112                 break;
3113         }
3114
3115         request->proxy_reply = packet;
3116
3117 #if 0
3118         /*
3119          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3120          *      Note that we only do so on the first response.
3121          */
3122         if ((request->num_proxied_responses == 1)
3123                 int rtt;
3124                 home_server *home = request->home_server;
3125
3126                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3127                 rtt *= USEC;
3128                 rtt += now.tv_usec;
3129                 rtt -= request->proxy_when.tv_usec;
3130
3131                 if (!home->has_rtt) {
3132                         home->has_rtt = TRUE;
3133
3134                         home->srtt = rtt;
3135                         home->rttvar = rtt / 2;
3136
3137                 } else {
3138                         home->rttvar -= home->rttvar >> 2;
3139                         home->rttvar += (home->srtt - rtt);
3140                         home->srtt -= home->srtt >> 3;
3141                         home->srtt += rtt >> 3;
3142                 }
3143
3144                 home->rto = home->srtt;
3145                 if (home->rttvar > (USEC / 4)) {
3146                         home->rto += home->rttvar * 4;
3147                 } else {
3148                         home->rto += USEC;
3149                 }
3150         }
3151 #endif
3152
3153         /*
3154          *      There's no incoming request, so it's a proxied packet
3155          *      we originated.
3156          */
3157         if (!request->packet) {
3158                 received_response_to_ping(request);
3159                 request->proxy_reply = NULL; /* caller will free it */
3160                 ev_request_free(&request);
3161                 return NULL;
3162         }
3163
3164         request->child_state = REQUEST_QUEUED;
3165         request->when = now;
3166         request->delay = USEC;
3167         request->priority = RAD_LISTEN_PROXY;
3168         tv_add(&request->when, request->delay);
3169
3170         /*
3171          *      Wait a bit will take care of max_request_time
3172          */
3173         INSERT_EVENT(wait_a_bit, request);
3174
3175         return request;
3176 }
3177 #endif
3178
3179 void event_new_fd(rad_listen_t *this)
3180 {
3181         char buffer[1024];
3182
3183         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3184
3185         this->print(this, buffer, sizeof(buffer));
3186
3187         if (this->status == RAD_LISTEN_STATUS_INIT) {
3188                 if (just_started) {
3189                         DEBUG("Listening on %s", buffer);
3190                 } else {
3191                         DEBUG2(" ... adding new socket %s", buffer);
3192                 }
3193                 if (!fr_event_fd_insert(el, 0, this->fd,
3194                                         event_socket_handler, this)) {
3195                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3196                         exit(1);
3197                 }
3198
3199                 this->status = RAD_LISTEN_STATUS_KNOWN;
3200                 return;
3201         }
3202
3203         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3204                 DEBUG2(" ... closing socket %s", buffer);
3205
3206                 fr_event_fd_delete(el, 0, this->fd);
3207                 this->status = RAD_LISTEN_STATUS_FINISH;
3208
3209                 /*
3210                  *      Close the fd AFTER fixing up the requests and
3211                  *      listeners, so that they don't send/recv on the
3212                  *      wrong socket (if someone manages to open
3213                  *      another one).
3214                  */
3215                 close(this->fd);
3216                 this->fd = -1;
3217         }
3218 }
3219
3220 static void handle_signal_self(int flag)
3221 {
3222         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3223                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3224                         fr_event_loop_exit(el, 1);
3225                 } else {
3226                         fr_event_loop_exit(el, 2);
3227                 }
3228
3229                 return;
3230         } /* else exit/term flags weren't set */
3231
3232         /*
3233          *      Tell the even loop to stop processing.
3234          */
3235         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3236                 time_t when;
3237                 static time_t last_hup = 0;
3238
3239                 DEBUG("Received HUP signal.");
3240
3241                 when = time(NULL);
3242                 if ((int) (when - last_hup) < 5) {
3243                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3244                         return;
3245                 }
3246                 last_hup = when;
3247
3248                 fr_event_loop_exit(el, 0x80);
3249         }
3250
3251 #ifdef WITH_DETAIL
3252         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3253                 rad_listen_t *this;
3254
3255                 /*
3256                  *      FIXME: O(N) loops suck.
3257                  */
3258                 for (this = mainconfig.listen;
3259                      this != NULL;
3260                      this = this->next) {
3261                         if (this->type != RAD_LISTEN_DETAIL) continue;
3262
3263                         /*
3264                          *      This one didn't send the signal, skip
3265                          *      it.
3266                          */
3267                         if (!this->decode(this, NULL)) continue;
3268
3269                         /*
3270                          *      Go service the interrupt.
3271                          */
3272                         event_poll_detail(this);
3273                 }
3274         }
3275 #endif
3276
3277         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3278                 rad_listen_t *this;
3279
3280                 for (this = mainconfig.listen;
3281                      this != NULL;
3282                      this = this->next) {
3283                         event_new_fd(this);
3284                 }
3285         }
3286 }
3287
3288 #ifndef WITH_SELF_PIPE
3289 void radius_signal_self(int flag)
3290 {
3291         handle_signal_self(flag);
3292 }
3293 #else
3294 /*
3295  *      Inform ourselves that we received a signal.
3296  */
3297 void radius_signal_self(int flag)
3298 {
3299         ssize_t rcode;
3300         uint8_t buffer[16];
3301
3302         /*
3303          *      The read MUST be non-blocking for this to work.
3304          */
3305         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3306         if (rcode > 0) {
3307                 ssize_t i;
3308
3309                 for (i = 0; i < rcode; i++) {
3310                         buffer[0] |= buffer[i];
3311                 }
3312         } else {
3313                 buffer[0] = 0;
3314         }
3315
3316         buffer[0] |= flag;
3317
3318         write(self_pipe[1], buffer, 1);
3319 }
3320
3321
3322 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3323                                  UNUSED int fd, UNUSED void *ctx)
3324 {
3325         ssize_t i, rcode;
3326         uint8_t buffer[32];
3327
3328         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3329         if (rcode <= 0) return;
3330
3331         /*
3332          *      Merge pending signals.
3333          */
3334         for (i = 0; i < rcode; i++) {
3335                 buffer[0] |= buffer[i];
3336         }
3337
3338         handle_signal_self(buffer[0]);
3339 }
3340 #endif
3341
3342
3343 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3344                                  void *ctx)
3345 {
3346         rad_listen_t *listener = ctx;
3347         RAD_REQUEST_FUNP fun;
3348         REQUEST *request;
3349
3350         rad_assert(xel == el);
3351
3352         xel = xel;
3353
3354         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3355
3356         if (!listener->recv(listener, &fun, &request)) return;
3357
3358         if (!thread_pool_addrequest(request, fun)) {
3359                 request->child_state = REQUEST_DONE;
3360         }
3361 }
3362
3363 typedef struct listen_detail_t {
3364         fr_event_t      *ev;
3365 } listen_detail_t;
3366
3367 /*
3368  *      This function is called periodically to see if this detail
3369  *      file is available for reading.
3370  */
3371 static void event_poll_detail(void *ctx)
3372 {
3373         int rcode, delay;
3374         RAD_REQUEST_FUNP fun;
3375         REQUEST *request;
3376         rad_listen_t *this = ctx;
3377         struct timeval when;
3378         listen_detail_t *detail = this->data;
3379
3380         rad_assert(this->type == RAD_LISTEN_DETAIL);
3381
3382         /*
3383          *      Try to read something.
3384          *
3385          *      FIXME: This does poll AND receive.
3386          */
3387         rcode = this->recv(this, &fun, &request);
3388         if (rcode != 0) {
3389                 rad_assert(fun != NULL);
3390                 rad_assert(request != NULL);
3391
3392                 if (!thread_pool_addrequest(request, fun)) {
3393                         request->child_state = REQUEST_DONE;
3394                 }
3395         }
3396
3397         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3398         when = now;
3399
3400         /*
3401          *      Backdoor API to get the delay until the next poll time.
3402          */
3403         delay = this->encode(this, NULL);
3404         tv_add(&when, delay);
3405
3406         if (!fr_event_insert(el, event_poll_detail, this,
3407                              &when, &detail->ev)) {
3408                 radlog(L_ERR, "Failed creating handler");
3409                 exit(1);
3410         }
3411 }
3412
3413
3414 static void event_status(struct timeval *wake)
3415 {
3416 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3417         int argval;
3418 #endif
3419
3420         if (debug_flag == 0) {
3421                 if (just_started) {
3422                         radlog(L_INFO, "Ready to process requests.");
3423                         just_started = FALSE;
3424                 }
3425                 return;
3426         }
3427
3428         if (!wake) {
3429                 DEBUG("Ready to process requests.");
3430
3431         } else if ((wake->tv_sec != 0) ||
3432                    (wake->tv_usec >= 100000)) {
3433                 DEBUG("Waking up in %d.%01u seconds.",
3434                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3435         }
3436
3437
3438         /*
3439          *      FIXME: Put this somewhere else, where it isn't called
3440          *      all of the time...
3441          */
3442
3443 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3444         /*
3445          *      If there are no child threads, then there may
3446          *      be child processes.  In that case, wait for
3447          *      their exit status, and throw that exit status
3448          *      away.  This helps get rid of zxombie children.
3449          */
3450         while (waitpid(-1, &argval, WNOHANG) > 0) {
3451                 /* do nothing */
3452         }
3453 #endif
3454
3455 }
3456
3457 /*
3458  *      Externally-visibly functions.
3459  */
3460 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3461 {
3462         rad_listen_t *this, *head = NULL;
3463
3464         if (el) return 0;
3465
3466         time(&fr_start_time);
3467
3468         el = fr_event_list_create(event_status);
3469         if (!el) return 0;
3470
3471         pl = fr_packet_list_create(0);
3472         if (!pl) return 0;      /* leak el */
3473
3474         request_num_counter = 0;
3475
3476         /*
3477          *      Move all of the thread calls to this file?
3478          *
3479          *      It may be best for the mutexes to be in this file...
3480          */
3481         have_children = spawn_flag;
3482
3483 #ifdef WITH_PROXY
3484         if (mainconfig.proxy_requests) {
3485                 pthread_mutexattr_t attr;
3486
3487                 /*
3488                  *      Create the tree for managing proxied requests and
3489                  *      responses.
3490                  */
3491                 proxy_list = fr_packet_list_create(1);
3492                 if (!proxy_list) return 0;
3493
3494 #ifdef HAVE_PTHREAD_H
3495                 pthread_mutexattr_init(&attr);
3496
3497 #ifdef PTHREAD_MUTEX_RECURSIVE
3498                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3499                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3500                                strerror(errno));
3501                         exit(1);
3502                 }
3503 #endif
3504
3505                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3506                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3507                                strerror(errno));
3508                         exit(1);
3509                 }
3510
3511                 pthread_mutexattr_destroy(&attr);
3512 #endif
3513         }
3514 #endif
3515
3516         /*
3517          *      Just before we spawn the child threads, force the log
3518          *      subsystem to re-open the log file for every write.
3519          */
3520         if (spawn_flag) force_log_reopen();
3521
3522 #ifdef HAVE_PTHREAD_H
3523 #ifndef __MINGW32__
3524         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3525 #else
3526         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3527 #endif
3528         if (thread_pool_init(cs, spawn_flag) < 0) {
3529                 exit(1);
3530         }
3531 #endif
3532
3533         if (check_config) {
3534                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3535                        mainconfig.name);
3536                 return 1;
3537         }
3538
3539 #ifdef WITH_SELF_PIPE
3540         /*
3541          *      Child threads need a pipe to signal us, as do the
3542          *      signal handlers.
3543          */
3544         if (pipe(self_pipe) < 0) {
3545                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3546                        strerror(errno));
3547                 exit(1);
3548         }
3549         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3550                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3551                        strerror(errno));
3552                 exit(1);
3553         }
3554         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3555                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3556                        strerror(errno));
3557                 exit(1);
3558         }
3559
3560         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3561                                   event_signal_handler, el)) {
3562                 radlog(L_ERR, "Failed creating handler for signals");
3563                 exit(1);
3564         }
3565 #endif  /* WITH_SELF_PIPE */
3566
3567 #ifdef WITH_PROXY
3568         /*
3569          *      Mark the proxy Fd's as unused.
3570          */
3571         {
3572                 int i;
3573
3574                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3575         }
3576 #endif
3577
3578        DEBUG("%s: #### Opening IP addresses and Ports ####",
3579                mainconfig.name);
3580
3581        /*
3582         *       The server temporarily switches to an unprivileged
3583         *       user very early in the bootstrapping process.
3584         *       However, some sockets MAY require privileged access
3585         *       (bind to device, or to port < 1024, or to raw
3586         *       sockets).  Those sockets need to call suid up/down
3587         *       themselves around the functions that need a privileged
3588         *       uid.
3589         */
3590         if (listen_init(cs, &head) < 0) {
3591                 _exit(1);
3592         }
3593
3594         /*
3595          *      At this point, no one has any business *ever* going
3596          *      back to root uid.
3597          */
3598         fr_suid_down_permanent();
3599
3600         /*
3601          *      Add all of the sockets to the event loop.
3602          */
3603         for (this = head;
3604              this != NULL;
3605              this = this->next) {
3606                 char buffer[256];
3607
3608                 this->print(this, buffer, sizeof(buffer));
3609
3610                 switch (this->type) {
3611 #ifdef WITH_DETAIL
3612                 case RAD_LISTEN_DETAIL:
3613                         DEBUG("Listening on %s", buffer);
3614
3615                         /*
3616                          *      Detail files are always known, and aren't
3617                          *      put into the socket event loop.
3618                          */
3619                         this->status = RAD_LISTEN_STATUS_KNOWN;
3620
3621                         /*
3622                          *      Set up the first poll interval.
3623                          */
3624                         event_poll_detail(this);
3625                         break;
3626 #endif
3627
3628 #ifdef WITH_PROXY
3629                 case RAD_LISTEN_PROXY:
3630                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3631                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3632
3633                         proxy_fds[this->fd & 0x1f] = this->fd;
3634                         proxy_listeners[this->fd & 0x1f] = this;
3635                         if (!fr_packet_list_socket_add(proxy_list,
3636                                                          this->fd)) {
3637                                 rad_assert(0 == 1);
3638                         }
3639                         /* FALL-THROUGH */
3640 #endif
3641
3642                 default:
3643                         break;
3644                 }
3645
3646                 event_new_fd(this);
3647         }
3648
3649         mainconfig.listen = head;
3650
3651         return 1;
3652 }
3653
3654
3655 static int request_hash_cb(UNUSED void *ctx, void *data)
3656 {
3657         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3658
3659 #ifdef WITH_PROXY
3660         rad_assert(request->in_proxy_hash == FALSE);
3661 #endif
3662
3663         ev_request_free(&request);
3664
3665         return 0;
3666 }
3667
3668
3669 #ifdef WITH_PROXY
3670 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3671 {
3672         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3673
3674         ev_request_free(&request);
3675
3676         return 0;
3677 }
3678 #endif
3679
3680 void radius_event_free(void)
3681 {
3682         /*
3683          *      FIXME: Stop all threads, or at least check that
3684          *      they're all waiting on the semaphore, and the queues
3685          *      are empty.
3686          */
3687
3688 #ifdef WITH_PROXY
3689         /*
3690          *      There are requests in the proxy hash that aren't
3691          *      referenced from anywhere else.  Remove them first.
3692          */
3693         if (proxy_list) {
3694                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3695                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3696                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3697                 fr_packet_list_free(proxy_list);
3698                 proxy_list = NULL;
3699         }
3700 #endif
3701
3702         fr_packet_list_walk(pl, NULL, request_hash_cb);
3703
3704         fr_packet_list_free(pl);
3705         pl = NULL;
3706
3707         fr_event_list_free(el);
3708 }
3709
3710 int radius_event_process(void)
3711 {
3712         if (!el) return 0;
3713
3714         return fr_event_loop(el);
3715 }
3716
3717 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3718 {
3719         request->options = RAD_REQUEST_OPTION_DEBUG2;
3720
3721         if (request_pre_handler(request)) {
3722                 rad_assert(fun != NULL);
3723                 rad_assert(request != NULL);
3724
3725                 if (request->server) RDEBUG("server %s {",
3726                                             request->server != NULL ?
3727                                             request->server : "");
3728                 fun(request);
3729
3730                 if (request->server) RDEBUG("} # server %s",
3731                                              request->server != NULL ?
3732                                             request->server : "");
3733
3734                 request_post_handler(request);
3735         }
3736
3737         DEBUG2("Going to the next request");
3738         return;
3739 }