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(request->radlog != NULL);
 598
 599         if (direction == 0) {
 600                 received = "Received";
 601                 from = "from";  /* what else? */
 602                 ip = &packet->src_ipaddr;
 603                 port = packet->src_port;
 604
 605         } else {
 606                 received = "Sending";
 607                 from = "to";    /* hah! */
 608                 ip = &packet->dst_ipaddr;
 609                 port = packet->dst_port;
 610         }
 611
 612         /*
 613          *      Client-specific debugging re-prints the input
 614          *      packet into the client log.
 615          *
 616          *      This really belongs in a utility library
 617          */
 618         if ((packet->code > 0) && (packet->code < MAX_PACKET_CODE)) {
 619                 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
 620                        received, packet_codes[packet->code], from,
 621                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 622                        port, packet->id, packet->data_len);
 623         } else {
 624                 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
 625                        received, from,
 626                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 627                        port,
 628                        packet->code, packet->id, packet->data_len);
 629         }
 630
 631         for (vp = packet->vps; vp != NULL; vp = vp->next) {
 632                 vp_prints(buffer, sizeof(buffer), vp);
 633                 request->radlog(L_DBG, 0, request, "\t%s", buffer);
 634         }
 635 }
 636
 637 static void reject_delay(void *ctx)
 638 {
 639         REQUEST *request = ctx;
 640
 641         rad_assert(request->magic == REQUEST_MAGIC);
 642         rad_assert(request->child_state == REQUEST_REJECT_DELAY);
 643
 644         RDEBUG2("Sending delayed reject for request %d", request->number);
 645
 646         DEBUG_PACKET(request, request->reply, 1);
 647
 648         request->listener->send(request->listener, request);
 649
 650         request->when.tv_sec += request->root->cleanup_delay;
 651         request->child_state = REQUEST_CLEANUP_DELAY;
 652
 653         INSERT_EVENT(cleanup_delay, request);
 654 }
 655
 656
 657 #ifdef WITH_PROXY
 658 void revive_home_server(void *ctx)
 659 {
 660         home_server *home = ctx;
 661         char buffer[128];
 662
 663         home->state = HOME_STATE_ALIVE;
 664         home->currently_outstanding = 0;
 665         home->revive_time = now;
 666
 667         /*
 668          *      Delete any outstanding events.
 669          */
 670         if (home->ev) fr_event_delete(el, &home->ev);
 671
 672         radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
 673                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 674                          buffer, sizeof(buffer)),
 675                home->port);
 676
 677 }
 678
 679
 680 static void no_response_to_ping(void *ctx)
 681 {
 682         REQUEST *request = ctx;
 683         home_server *home;
 684         char buffer[128];
 685
 686         rad_assert(request->home_server != NULL);
 687
 688         home = request->home_server;
 689         home->num_received_pings = 0;
 690
 691         RDEBUG2("No response to status check %d from home server %s port %d",
 692                request->number,
 693                inet_ntop(request->proxy->dst_ipaddr.af,
 694                          &request->proxy->dst_ipaddr.ipaddr,
 695                          buffer, sizeof(buffer)),
 696                request->proxy->dst_port);
 697
 698         wait_for_proxy_id_to_expire(request);
 699 }
 700
 701
 702 static void received_response_to_ping(REQUEST *request)
 703 {
 704         home_server *home;
 705         char buffer[128];
 706
 707         rad_assert(request->home_server != NULL);
 708
 709         home = request->home_server;
 710         home->num_received_pings++;
 711
 712         RDEBUG2("Received response to status check %d (%d in current sequence)",
 713                request->number, home->num_received_pings);
 714
 715         /*
 716          *      Remove the request from any hashes
 717          */
 718         fr_event_delete(el, &request->ev);
 719         remove_from_proxy_hash(request);
 720         rad_assert(request->in_request_hash == FALSE);
 721
 722         /*
 723          *      The control socket may have marked the home server as
 724          *      alive.  OR, it may have suddenly started responding to
 725          *      requests again.  If so, don't re-do the "make alive"
 726          *      work.
 727          */
 728         if (home->state == HOME_STATE_ALIVE) return;
 729
 730         /*
 731          *      We haven't received enough ping responses to mark it
 732          *      "alive".  Wait a bit.
 733          */
 734         if (home->num_received_pings < home->num_pings_to_alive) {
 735                 return;
 736         }
 737
 738         home->state = HOME_STATE_ALIVE;
 739         home->currently_outstanding = 0;
 740         home->revive_time = now;
 741
 742         if (!fr_event_delete(el, &home->ev)) {
 743                 RDEBUG2("Hmm... no event for home server.  Oh well.");
 744         }
 745
 746         radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
 747                inet_ntop(request->proxy->dst_ipaddr.af,
 748                          &request->proxy->dst_ipaddr.ipaddr,
 749                          buffer, sizeof(buffer)),
 750                request->proxy->dst_port);
 751 }
 752
 753
 754 /*
 755  *      Called from start of zombie period, OR after control socket
 756  *      marks the home server dead.
 757  */
 758 static void ping_home_server(void *ctx)
 759 {
 760         uint32_t jitter;
 761         home_server *home = ctx;
 762         REQUEST *request;
 763         VALUE_PAIR *vp;
 764
 765         if ((home->state == HOME_STATE_ALIVE) ||
 766             (home->ping_check == HOME_PING_CHECK_NONE)) {
 767                 return;
 768         }
 769
 770         request = request_alloc();
 771         request->number = request_num_counter++;
 772
 773         request->proxy = rad_alloc(1);
 774         rad_assert(request->proxy != NULL);
 775
 776         fr_event_now(el, &request->when);
 777         home->when = request->when;
 778
 779         if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
 780                 request->proxy->code = PW_STATUS_SERVER;
 781
 782                 radius_pairmake(request, &request->proxy->vps,
 783                                 "Message-Authenticator", "0x00", T_OP_SET);
 784
 785         } else if (home->type == HOME_TYPE_AUTH) {
 786                 request->proxy->code = PW_AUTHENTICATION_REQUEST;
 787
 788                 radius_pairmake(request, &request->proxy->vps,
 789                                 "User-Name", home->ping_user_name, T_OP_SET);
 790                 radius_pairmake(request, &request->proxy->vps,
 791                                 "User-Password", home->ping_user_password, T_OP_SET);
 792                 radius_pairmake(request, &request->proxy->vps,
 793                                 "Service-Type", "Authenticate-Only", T_OP_SET);
 794                 radius_pairmake(request, &request->proxy->vps,
 795                                 "Message-Authenticator", "0x00", T_OP_SET);
 796
 797         } else {
 798 #ifdef WITH_ACCOUNTING
 799                 request->proxy->code = PW_ACCOUNTING_REQUEST;
 800
 801                 radius_pairmake(request, &request->proxy->vps,
 802                                 "User-Name", home->ping_user_name, T_OP_SET);
 803                 radius_pairmake(request, &request->proxy->vps,
 804                                 "Acct-Status-Type", "Stop", T_OP_SET);
 805                 radius_pairmake(request, &request->proxy->vps,
 806                                 "Acct-Session-Id", "00000000", T_OP_SET);
 807                 vp = radius_pairmake(request, &request->proxy->vps,
 808                                      "Event-Timestamp", "0", T_OP_SET);
 809                 vp->vp_date = now.tv_sec;
 810 #else
 811                 rad_assert("Internal sanity check failed");
 812 #endif
 813         }
 814
 815         radius_pairmake(request, &request->proxy->vps,
 816                         "NAS-Identifier", "Status Check. Are you alive?",
 817                         T_OP_SET);
 818
 819         request->proxy->dst_ipaddr = home->ipaddr;
 820         request->proxy->dst_port = home->port;
 821         request->home_server = home;
 822
 823         rad_assert(request->proxy_listener == NULL);
 824
 825         if (!insert_into_proxy_hash(request, FALSE)) {
 826                 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash.  Discarding it.",
 827                        request->number);
 828                 ev_request_free(&request);
 829                 return;
 830         }
 831         rad_assert(request->proxy_listener != NULL);
 832         request->proxy_listener->send(request->proxy_listener,
 833                                       request);
 834
 835         request->next_callback = NULL;
 836         request->child_state = REQUEST_PROXIED;
 837         request->when.tv_sec += home->ping_timeout;;
 838
 839         INSERT_EVENT(no_response_to_ping, request);
 840
 841         /*
 842          *      Add +/- 2s of jitter, as suggested in RFC 3539
 843          *      and in the Issues and Fixes draft.
 844          */
 845         home->when.tv_sec += home->ping_interval - 2;
 846
 847         jitter = fr_rand();
 848         jitter ^= (jitter >> 10);
 849         jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
 850
 851         tv_add(&home->when, jitter);
 852
 853         INSERT_EVENT(ping_home_server, home);
 854 }
 855
 856
 857 void mark_home_server_dead(home_server *home, struct timeval *when)
 858 {
 859         int previous_state = home->state;
 860         char buffer[128];
 861
 862         radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
 863                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 864                          buffer, sizeof(buffer)),
 865                home->port);
 866
 867         home->state = HOME_STATE_IS_DEAD;
 868         home->num_received_pings = 0;
 869
 870         if (home->ping_check != HOME_PING_CHECK_NONE) {
 871                 /*
 872                  *      If the control socket marks us dead, start
 873                  *      pinging.  Otherwise, we already started
 874                  *      pinging when it was marked "zombie".
 875                  */
 876                 if (previous_state == HOME_STATE_ALIVE) {
 877                         ping_home_server(home);
 878                 }
 879
 880         } else {
 881                 /*
 882                  *      Revive it after a fixed period of time.  This
 883                  *      is very, very, bad.
 884                  */
 885                 home->when = *when;
 886                 home->when.tv_sec += home->revive_interval;
 887
 888                 INSERT_EVENT(revive_home_server, home);
 889         }
 890 }
 891
 892 static void check_for_zombie_home_server(REQUEST *request)
 893 {
 894         home_server *home;
 895         struct timeval when;
 896
 897         home = request->home_server;
 898
 899         if (home->state != HOME_STATE_ZOMBIE) return;
 900
 901         when = home->zombie_period_start;
 902         when.tv_sec += home->zombie_period;
 903
 904         fr_event_now(el, &now);
 905         if (timercmp(&now, &when, <)) {
 906                 return;
 907         }
 908
 909         mark_home_server_dead(home, &request->when);
 910 }
 911
 912 static int proxy_to_virtual_server(REQUEST *request);
 913
 914 static int virtual_server_handler(UNUSED REQUEST *request)
 915 {
 916         proxy_to_virtual_server(request);
 917         return 0;
 918 }
 919
 920 static void proxy_fallback_handler(REQUEST *request)
 921 {
 922         /*
 923          *      A proper time is required for wait_a_bit.
 924          */
 925         request->delay = USEC / 10;
 926         gettimeofday(&now, NULL);
 927         request->next_when = now;
 928         tv_add(&request->next_when, request->delay);
 929         request->next_callback = wait_a_bit;
 930
 931         /*
 932          *      Re-queue the request.
 933          */
 934         request->child_state = REQUEST_QUEUED;
 935
 936         rad_assert(request->proxy != NULL);
 937         if (!thread_pool_addrequest(request, virtual_server_handler)) {
 938                 request->child_state = REQUEST_DONE;
 939         }
 940
 941 #ifdef HAVE_PTHREAD_H
 942         /*
 943          *      MAY free the request if we're over max_request_time,
 944          *      AND we're not in threaded mode!
 945          *
 946          *      Note that we call this ONLY if we're threaded, as
 947          *      if we're NOT threaded, request_post_handler() calls
 948          *      wait_a_bit(), which means that "request" may not
 949          *      exist any more...
 950          */
 951         if (have_children) wait_a_bit(request);
 952 #endif
 953 }
 954
 955
 956 static int setup_post_proxy_fail(REQUEST *request)
 957 {
 958         DICT_VALUE *dval = NULL;
 959         VALUE_PAIR *vp;
 960
 961         request->child_state = REQUEST_RUNNING;
 962
 963         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 964                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 965
 966         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 967                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 968
 969 #ifdef WITH_COA
 970                 /*
 971                  *      See no_response_to_coa_request
 972                  */
 973         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 974                 request->packet->code &= 0xff; /* restore it */
 975
 976                 if (request->proxy->code == PW_COA_REQUEST) {
 977                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 978
 979                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 980                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 981                 } else {
 982                         return 0;
 983                 }
 984
 985 #endif
 986         } else {
 987                 return 0;
 988         }
 989
 990         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 991
 992         if (!dval) {
 993                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 994                 return 0;
 995         }
 996
 997         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 998         if (!vp) vp = radius_paircreate(request, &request->config_items,
 999                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
1000         vp->vp_integer = dval->value;
1001
1002         rad_assert(request->proxy_reply == NULL);
1003
1004         return 1;
1005 }
1006
1007
1008 static int null_handler(UNUSED REQUEST *request)
1009 {
1010         return 0;
1011 }
1012
1013 static void post_proxy_fail_handler(REQUEST *request)
1014 {
1015         /*
1016          *      A proper time is required for wait_a_bit.
1017          */
1018         request->delay = USEC / 10;
1019         gettimeofday(&now, NULL);
1020
1021         /*
1022          *      Not set up to run Post-Proxy-Type = Fail.
1023          *
1024          *      Mark the request as still running, and figure out what
1025          *      to do next.
1026          */
1027         if (!setup_post_proxy_fail(request)) {
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         check_for_zombie_home_server(request);
1087
1088         home = request->home_server;
1089
1090         /*
1091          *      The default as of 2.1.7 is to allow requests to
1092          *      fail-over to a backup home server when this one does
1093          *      not respond.  The old behavior can be configured as
1094          *      well.
1095          */
1096         if (home->no_response_fail) {
1097                 radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1098                        request->number,
1099                        inet_ntop(request->proxy->dst_ipaddr.af,
1100                                  &request->proxy->dst_ipaddr.ipaddr,
1101                                  buffer, sizeof(buffer)),
1102                        request->proxy->dst_port);
1103
1104                 post_proxy_fail_handler(request);
1105         }
1106
1107         /*
1108          *      Don't touch request due to race conditions
1109          */
1110         if (home->state == HOME_STATE_IS_DEAD) {
1111                 rad_assert(home->ev != NULL); /* or it will never wake up */
1112                 return;
1113         }
1114
1115         /*
1116          *      Enable the zombie period when we notice that the home
1117          *      server hasn't responded.  We do NOT back-date the start
1118          *      of the zombie period.
1119          */
1120         if (home->state == HOME_STATE_ALIVE) {
1121                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1122                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1123                                  buffer, sizeof(buffer)),
1124                        home->port);
1125                 home->state = HOME_STATE_ZOMBIE;
1126                 home->zombie_period_start = now;
1127
1128                 /*
1129                  *      Start pinging the home server.
1130                  */
1131                 ping_home_server(home);
1132         }
1133 }
1134 #endif
1135
1136 static void wait_a_bit(void *ctx)
1137 {
1138         struct timeval when;
1139         REQUEST *request = ctx;
1140         fr_event_callback_t callback = NULL;
1141
1142         rad_assert(request->magic == REQUEST_MAGIC);
1143
1144 #ifdef WITH_COA
1145         /*
1146          *      The CoA request is a new (internally generated)
1147          *      request, created in a child thread.  We therefore need
1148          *      some way to tie its events back into the main event
1149          *      handler.
1150          */
1151         if (request->coa && !request->coa->proxy_reply &&
1152             request->coa->next_callback) {
1153                 request->coa->when = request->coa->next_when;
1154                 INSERT_EVENT(request->coa->next_callback, request->coa);
1155                 request->coa->next_callback = NULL;
1156                 request->coa->parent = NULL;
1157                 request->coa = NULL;
1158         }
1159 #endif
1160
1161         switch (request->child_state) {
1162         case REQUEST_QUEUED:
1163         case REQUEST_RUNNING:
1164                 when = request->received;
1165                 when.tv_sec += request->root->max_request_time;
1166
1167                 /*
1168                  *      Normally called from the event loop with the
1169                  *      proper event loop time.  Otherwise, called from
1170                  *      post proxy fail handler, which sets "now", and
1171                  *      this call won't re-set it, because we're not
1172                  *      in the event loop.
1173                  */
1174                 fr_event_now(el, &now);
1175
1176                 /*
1177                  *      Request still has more time.  Continue
1178                  *      waiting.
1179                  */
1180                 if (timercmp(&now, &when, <) ||
1181                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1182                      (request->child_state == REQUEST_QUEUED))) {
1183                         if (request->delay < (USEC / 10)) {
1184                                 request->delay = USEC / 10;
1185                         }
1186                         request->delay += request->delay >> 1;
1187
1188 #ifdef WITH_DETAIL
1189                         /*
1190                          *      Cap wait at some sane value for detail
1191                          *      files.
1192                          */
1193                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1194                             (request->delay > (request->root->max_request_time * USEC))) {
1195                                 request->delay = request->root->max_request_time * USEC;
1196                         }
1197 #endif
1198
1199                         request->when = now;
1200                         tv_add(&request->when, request->delay);
1201                         callback = wait_a_bit;
1202                         break;
1203                 }
1204
1205 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1206                 /*
1207                  *      A child thread MAY still be running on the
1208                  *      request.  Ask the thread to stop working on
1209                  *      the request.
1210                  */
1211                 if (have_children) {
1212                         /* FIXME: kill unresponsive children? */
1213
1214                         /*
1215                          *      Print this error message ONLY if
1216                          *      there's a child currently processing
1217                          *      the request.  As we don't have thread
1218                          *      locks here, there may be race
1219                          *      conditions on this check.  But it's
1220                          *      just an error message, so that's OK.
1221                          */
1222                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1223                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1224                                        request->number,
1225                                        request->module ? request->module : "<server core>",
1226                                        request->component ? request->component : "<server core>");
1227                         }
1228
1229                         request->master_state = REQUEST_STOP_PROCESSING;
1230
1231                         request->delay = USEC / 4;
1232                         tv_add(&request->when, request->delay);
1233                         callback = wait_for_child_to_die;
1234                         break;
1235                 }
1236 #endif
1237
1238                 /*
1239                  *      Else there are no child threads.  We probably
1240                  *      should have just marked the request as 'done'
1241                  *      elsewhere, like in the post-proxy-fail
1242                  *      handler.  But doing that would involve
1243                  *      checking for max_request_time in multiple
1244                  *      places, so this may be simplest.
1245                  */
1246                 request->child_state = REQUEST_DONE;
1247                 /* FALL-THROUGH */
1248
1249                 /*
1250                  *      Mark the request as no longer running,
1251                  *      and clean it up.
1252                  */
1253         case REQUEST_DONE:
1254 #ifdef HAVE_PTHREAD_H
1255                 request->child_pid = NO_SUCH_CHILD_PID;
1256 #endif
1257
1258 #ifdef WTH_COA
1259                 /*
1260                  *      This is a CoA request.  It's been divorced
1261                  *      from everything else, so we clean it up now.
1262                  */
1263                 if (!request->in_request_hash &&
1264                     request->proxy &&
1265                     (request->packet->code != request->proxy->code) &&
1266                     ((request->proxy->code == PW_COA_REQUEST) ||
1267                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1268                         /*
1269                          *      FIXME: Do CoA MIBs
1270                          */
1271                         ev_request_free(&request);
1272                         return;
1273                 }
1274 #endif
1275                 request_stats_final(request);
1276                 cleanup_delay(request);
1277                 return;
1278
1279         case REQUEST_REJECT_DELAY:
1280         case REQUEST_CLEANUP_DELAY:
1281 #ifdef HAVE_PTHREAD_H
1282                 request->child_pid = NO_SUCH_CHILD_PID;
1283 #endif
1284                 request_stats_final(request);
1285
1286         case REQUEST_PROXIED:
1287                 rad_assert(request->next_callback != NULL);
1288                 rad_assert(request->next_callback != wait_a_bit);
1289
1290                 request->when = request->next_when;
1291                 callback = request->next_callback;
1292                 request->next_callback = NULL;
1293                 break;
1294
1295         default:
1296                 rad_panic("Internal sanity check failure");
1297                 return;
1298         }
1299
1300         /*
1301          *      Something major went wrong.  Discard the request, and
1302          *      keep running.
1303          *
1304          *      FIXME: No idea why this happens or how to fix it...
1305          *      It seems to happen *only* when requests are proxied,
1306          *      and where the home server doesn't respond.  So it looks
1307          *      like a race condition above, but it happens in debug
1308          *      mode, with no threads...
1309          */
1310         if (!callback) {
1311                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1312                 ev_request_free(&request);
1313                 return;
1314         }
1315
1316         INSERT_EVENT(callback, request);
1317 }
1318
1319 #ifdef WITH_COA
1320 static void no_response_to_coa_request(void *ctx)
1321 {
1322         REQUEST *request = ctx;
1323         char buffer[128];
1324
1325         rad_assert(request->magic == REQUEST_MAGIC);
1326         rad_assert(request->child_state == REQUEST_PROXIED);
1327         rad_assert(request->home_server != NULL);
1328         rad_assert(!request->in_request_hash);
1329
1330         radlog(L_ERR, "No response to CoA request sent to %s",
1331                inet_ntop(request->proxy->dst_ipaddr.af,
1332                          &request->proxy->dst_ipaddr.ipaddr,
1333                          buffer, sizeof(buffer)));
1334
1335         /*
1336          *      Hack.
1337          */
1338         request->packet->code |= (PW_COA_REQUEST << 8);
1339         post_proxy_fail_handler(request);
1340 }
1341
1342
1343 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1344 {
1345         VALUE_PAIR *vp;
1346
1347         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1348         if (!vp) return 0;
1349
1350         vp->vp_date = when;
1351
1352         if (packet->data) {
1353                 free(packet->data);
1354                 packet->data = NULL;
1355                 packet->data_len = 0;
1356         }
1357
1358         return 1;               /* time stamp updated */
1359 }
1360
1361
1362 /*
1363  *      Called when we haven't received a response to a CoA request.
1364  */
1365 static void retransmit_coa_request(void *ctx)
1366 {
1367         int delay, frac;
1368         struct timeval mrd;
1369         REQUEST *request = ctx;
1370
1371         rad_assert(request->magic == REQUEST_MAGIC);
1372         rad_assert(request->child_state == REQUEST_PROXIED);
1373         rad_assert(request->home_server != NULL);
1374         rad_assert(!request->in_request_hash);
1375         rad_assert(request->parent == NULL);
1376
1377         fr_event_now(el, &now);
1378
1379         /*
1380          *      Cap count at MRC, if it is non-zero.
1381          */
1382         if (request->home_server->coa_mrc &&
1383             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1384                 no_response_to_coa_request(request);
1385                 return;
1386         }
1387
1388         /*
1389          *      RFC 5080 Section 2.2.1
1390          *
1391          *      RT = 2*RTprev + RAND*RTprev
1392          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1393          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1394          */
1395         delay = fr_rand();
1396         delay ^= (delay >> 16);
1397         delay &= 0xffff;
1398         frac = request->delay / 5;
1399         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1400
1401         delay += (2 * request->delay) - (request->delay / 10);
1402
1403         /*
1404          *      Cap delay at MRT, if MRT is non-zero.
1405          */
1406         if (request->home_server->coa_mrt &&
1407             (delay > (request->home_server->coa_mrt * USEC))) {
1408                 int mrt_usec = request->home_server->coa_mrt * USEC;
1409
1410                 /*
1411                  *      delay = MRT + RAND * MRT
1412                  *            = 0.9 MRT + rand(0,.2)  * MRT
1413                  */
1414                 delay = fr_rand();
1415                 delay ^= (delay >> 15);
1416                 delay &= 0x1ffff;
1417                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1418                 delay += mrt_usec - (mrt_usec / 10);
1419         }
1420
1421         request->delay = delay;
1422         request->when = now;
1423         tv_add(&request->when, request->delay);
1424         mrd = request->proxy_when;
1425         mrd.tv_sec += request->home_server->coa_mrd;
1426
1427         /*
1428          *      Cap duration at MRD.
1429          */
1430         if (timercmp(&mrd, &request->when, <)) {
1431                 request->when = mrd;
1432                 INSERT_EVENT(no_response_to_coa_request, request);
1433
1434         } else {
1435                 INSERT_EVENT(retransmit_coa_request, request);
1436         }
1437
1438         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1439                 if (!insert_into_proxy_hash(request, TRUE)) {
1440                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1441                         return;
1442                 }
1443
1444                 request->num_proxied_requests = 0;
1445                 request->num_proxied_responses = 0;
1446         }
1447
1448         request->num_proxied_requests++;
1449         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1450
1451         request->proxy_listener->send(request->proxy_listener,
1452                                       request);
1453 }
1454
1455
1456 /*
1457  *      The original request is either DONE, or in CLEANUP_DELAY.
1458  */
1459 static int originated_coa_request(REQUEST *request)
1460 {
1461         int delay, rcode, pre_proxy_type = 0;
1462         VALUE_PAIR *vp;
1463         REQUEST *coa;
1464         fr_ipaddr_t ipaddr;
1465         char buffer[256];
1466
1467         rad_assert(request->proxy == NULL);
1468         rad_assert(!request->in_proxy_hash);
1469         rad_assert(request->proxy_reply == NULL);
1470
1471         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1472         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1473         if (vp) {
1474                 if (vp->vp_integer == 0) {
1475                         ev_request_free(&request->coa);
1476                         return 1;       /* success */
1477                 }
1478
1479                 if (!request->coa) request_alloc_coa(request);
1480                 if (!request->coa) return 0;
1481         }
1482
1483         coa = request->coa;
1484
1485         /*
1486          *      src_ipaddr will be set up in proxy_encode.
1487          */
1488         memset(&ipaddr, 0, sizeof(ipaddr));
1489         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1490         if (vp) {
1491                 ipaddr.af = AF_INET;
1492                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1493
1494         } else if ((vp = pairfind(coa->proxy->vps,
1495                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1496                 ipaddr.af = AF_INET6;
1497                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1498
1499         } else if ((vp = pairfind(coa->proxy->vps,
1500                                   PW_HOME_SERVER_POOL)) != NULL) {
1501                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1502                                                   HOME_TYPE_COA);
1503                 if (!coa->home_pool) {
1504                         RDEBUG2("WARNING: No such home_server_pool %s",
1505                                vp->vp_strvalue);
1506         fail:
1507                         ev_request_free(&request->coa);
1508                         return 0;
1509                 }
1510
1511                 /*
1512                  *      Prefer
1513                  */
1514         } else if (request->client->coa_pool) {
1515                 coa->home_pool = request->client->coa_pool;
1516
1517         } else if (request->client->coa_server) {
1518                 coa->home_server = request->client->coa_server;
1519
1520         } else {
1521                 /*
1522                  *      If all else fails, send it to the client that
1523                  *      originated this request.
1524                  */
1525                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1526         }
1527
1528         /*
1529          *      Use the pool, if it exists.
1530          */
1531         if (coa->home_pool) {
1532                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1533                 if (!coa->home_server) {
1534                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1535                         goto fail;
1536                 }
1537
1538         } else if (!coa->home_server) {
1539                 int port = PW_COA_UDP_PORT;
1540
1541                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1542                 if (vp) port = vp->vp_integer;
1543
1544                 coa->home_server = home_server_find(&ipaddr, port);
1545                 if (!coa->home_server) {
1546                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1547                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1548                                          buffer, sizeof(buffer)), port);
1549                         goto fail;
1550                 }
1551         }
1552
1553         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1554         if (vp) {
1555                 switch (vp->vp_integer) {
1556                 case PW_COA_REQUEST:
1557                 case PW_DISCONNECT_REQUEST:
1558                         coa->proxy->code = vp->vp_integer;
1559                         break;
1560
1561                 default:
1562                         DEBUG("Cannot set CoA Packet-Type to code %d",
1563                               vp->vp_integer);
1564                         goto fail;
1565                 }
1566         }
1567
1568         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1569
1570         /*
1571          *      The rest of the server code assumes that
1572          *      request->packet && request->reply exist.  Copy them
1573          *      from the original request.
1574          */
1575         rad_assert(coa->packet != NULL);
1576         rad_assert(coa->packet->vps == NULL);
1577         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1578         coa->packet->vps = paircopy(request->packet->vps);
1579         coa->packet->data = NULL;
1580         rad_assert(coa->reply != NULL);
1581         rad_assert(coa->reply->vps == NULL);
1582         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1583         coa->reply->vps = paircopy(request->reply->vps);
1584         coa->reply->data = NULL;
1585         coa->config_items = paircopy(request->config_items);
1586
1587         /*
1588          *      Call the pre-proxy routines.
1589          */
1590         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1591         if (vp) {
1592                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1593                 pre_proxy_type = vp->vp_integer;
1594         }
1595
1596         if (coa->home_pool && coa->home_pool->virtual_server) {
1597                 const char *old_server = coa->server;
1598
1599                 coa->server = coa->home_pool->virtual_server;
1600                 RDEBUG2(" server %s {", coa->server);
1601                 rcode = module_pre_proxy(pre_proxy_type, coa);
1602                 RDEBUG2(" }");
1603                 coa->server = old_server;
1604         } else {
1605                 rcode = module_pre_proxy(pre_proxy_type, coa);
1606         }
1607         switch (rcode) {
1608         default:
1609                 goto fail;
1610
1611         /*
1612          *      Only send the CoA packet if the pre-proxy code succeeded.
1613          */
1614         case RLM_MODULE_NOOP:
1615         case RLM_MODULE_OK:
1616         case RLM_MODULE_UPDATED:
1617                 break;
1618         }
1619
1620         /*
1621          *      Source IP / port is set when the proxy socket
1622          *      is chosen.
1623          */
1624         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1625         coa->proxy->dst_port = coa->home_server->port;
1626
1627         if (!insert_into_proxy_hash(coa, FALSE)) {
1628                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1629                 goto fail;
1630         }
1631
1632         /*
1633          *      We CANNOT divorce the CoA request from the parent
1634          *      request.  This function is running in a child thread,
1635          *      and we need access to the main event loop in order to
1636          *      to add the timers for the CoA packet.  See
1637          *      wait_a_bit().
1638          */
1639
1640         /*
1641          *      Forget about the original request completely at this
1642          *      point.
1643          */
1644         request = coa;
1645
1646         gettimeofday(&request->proxy_when, NULL);
1647         request->received = request->next_when = request->proxy_when;
1648         rad_assert(request->proxy_reply == NULL);
1649
1650         /*
1651          *      Implement re-transmit algorithm as per RFC 5080
1652          *      Section 2.2.1.
1653          *
1654          *      We want IRT + RAND*IRT
1655          *      or 0.9 IRT + rand(0,.2) IRT
1656          *
1657          *      2^20 ~ USEC, and we want 2.
1658          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1659          */
1660         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1661         request->delay = delay * request->home_server->coa_irt;
1662         delay = request->home_server->coa_irt * USEC;
1663         delay -= delay / 10;
1664         delay += request->delay;
1665
1666         request->delay = delay;
1667         tv_add(&request->next_when, delay);
1668         request->next_callback = retransmit_coa_request;
1669
1670         /*
1671          *      Note that we set proxied BEFORE sending the packet.
1672          *
1673          *      Once we send it, the request is tainted, as
1674          *      another thread may have picked it up.  Don't
1675          *      touch it!
1676          */
1677         request->num_proxied_requests = 1;
1678         request->num_proxied_responses = 0;
1679         request->child_pid = NO_SUCH_CHILD_PID;
1680
1681         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1682
1683         request->child_state = REQUEST_PROXIED;
1684
1685         DEBUG_PACKET(request, request->proxy, 1);
1686
1687         request->proxy_listener->send(request->proxy_listener,
1688                                       request);
1689         return 1;
1690 }
1691 #endif  /* WITH_COA */
1692
1693 #ifdef WITH_PROXY
1694 static int process_proxy_reply(REQUEST *request)
1695 {
1696         int rcode;
1697         int post_proxy_type = 0;
1698         VALUE_PAIR *vp;
1699
1700         /*
1701          *      Delete any reply we had accumulated until now.
1702          */
1703         pairfree(&request->reply->vps);
1704
1705         /*
1706          *      Run the packet through the post-proxy stage,
1707          *      BEFORE playing games with the attributes.
1708          */
1709         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1710         if (vp) {
1711                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1712                 post_proxy_type = vp->vp_integer;
1713         }
1714
1715         if (request->home_pool && request->home_pool->virtual_server) {
1716                 const char *old_server = request->server;
1717
1718                 request->server = request->home_pool->virtual_server;
1719                 RDEBUG2(" server %s {", request->server);
1720                 rcode = module_post_proxy(post_proxy_type, request);
1721                 RDEBUG2(" }");
1722                 request->server = old_server;
1723         } else {
1724                 rcode = module_post_proxy(post_proxy_type, request);
1725         }
1726
1727 #ifdef WITH_COA
1728         if (request->packet->code == request->proxy->code)
1729           /*
1730            *    Don't run the next bit if we originated a CoA
1731            *    packet, after receiving an Access-Request or
1732            *    Accounting-Request.
1733            */
1734 #endif
1735
1736         /*
1737          *      There may NOT be a proxy reply, as we may be
1738          *      running Post-Proxy-Type = Fail.
1739          */
1740         if (request->proxy_reply) {
1741                 /*
1742                  *      Delete the Proxy-State Attributes from
1743                  *      the reply.  These include Proxy-State
1744                  *      attributes from us and remote server.
1745                  */
1746                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1747
1748                 /*
1749                  *      Add the attributes left in the proxy
1750                  *      reply to the reply list.
1751                  */
1752                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1753                 request->proxy_reply->vps = NULL;
1754
1755                 /*
1756                  *      Free proxy request pairs.
1757                  */
1758                 pairfree(&request->proxy->vps);
1759         }
1760
1761         switch (rcode) {
1762         default:  /* Don't do anything */
1763                 break;
1764         case RLM_MODULE_FAIL:
1765                 /* FIXME: debug print stuff */
1766                 request->child_state = REQUEST_DONE;
1767                 return 0;
1768
1769         case RLM_MODULE_HANDLED:
1770                 /* FIXME: debug print stuff */
1771                 request->child_state = REQUEST_DONE;
1772                 return 0;
1773         }
1774
1775         return 1;
1776 }
1777 #endif
1778
1779 static int request_pre_handler(REQUEST *request)
1780 {
1781         int rcode;
1782
1783         rad_assert(request->magic == REQUEST_MAGIC);
1784         rad_assert(request->packet != NULL);
1785
1786         request->child_state = REQUEST_RUNNING;
1787
1788         /*
1789          *      Don't decode the packet if it's an internal "fake"
1790          *      request.  Instead, just return so that the caller can
1791          *      process it.
1792          */
1793         if (request->packet->dst_port == 0) {
1794                 request->username = pairfind(request->packet->vps,
1795                                              PW_USER_NAME);
1796                 request->password = pairfind(request->packet->vps,
1797                                              PW_USER_PASSWORD);
1798                 return 1;
1799         }
1800
1801 #ifdef WITH_PROXY
1802         /*
1803          *      Put the decoded packet into it's proper place.
1804          */
1805         if (request->proxy_reply != NULL) {
1806                 rcode = request->proxy_listener->decode(request->proxy_listener,
1807                                                         request);
1808                 DEBUG_PACKET(request, request->proxy_reply, 0);
1809         } else
1810 #endif
1811         if (request->packet->vps == NULL) {
1812                 rcode = request->listener->decode(request->listener, request);
1813
1814                 if (debug_condition) {
1815                         int result = FALSE;
1816                         const char *my_debug = debug_condition;
1817
1818                         /*
1819                          *      Ignore parse errors.
1820                          */
1821                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1822                                                   &my_debug, 1,
1823                                                   &result);
1824                         if (result) {
1825                                 request->options = 2;
1826                                 request->radlog = radlog_request;
1827                         }
1828                 }
1829
1830                 DEBUG_PACKET(request, request->packet, 0);
1831         } else {
1832                 rcode = 0;
1833         }
1834
1835         if (rcode < 0) {
1836                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1837                 request->child_state = REQUEST_DONE;
1838                 return 0;
1839         }
1840
1841         if (!request->username) {
1842                 request->username = pairfind(request->packet->vps,
1843                                              PW_USER_NAME);
1844         }
1845
1846 #ifdef WITH_PROXY
1847         if (request->proxy) {
1848                 return process_proxy_reply(request);
1849 #endif
1850         }
1851
1852         return 1;
1853 }
1854
1855
1856 #ifdef WITH_PROXY
1857 /*
1858  *      Do state handling when we proxy a request.
1859  */
1860 static int proxy_request(REQUEST *request)
1861 {
1862         struct timeval when;
1863         char buffer[128];
1864
1865         if (request->home_server->server) {
1866                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1867                 return 0;
1868         }
1869
1870         if (!insert_into_proxy_hash(request, FALSE)) {
1871                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1872                 return 0;
1873         }
1874
1875         request->proxy_listener->encode(request->proxy_listener, request);
1876
1877         when = request->received;
1878         when.tv_sec += request->root->max_request_time;
1879
1880         gettimeofday(&request->proxy_when, NULL);
1881
1882         request->next_when = request->proxy_when;
1883         request->next_when.tv_sec += request->home_server->response_window;
1884
1885         rad_assert(request->home_server->response_window > 0);
1886
1887         if (timercmp(&when, &request->next_when, <)) {
1888                 request->next_when = when;
1889         }
1890         request->next_callback = no_response_to_proxied_request;
1891
1892         RDEBUG2("Proxying request %d to home server %s port %d",
1893                request->number,
1894                inet_ntop(request->proxy->dst_ipaddr.af,
1895                          &request->proxy->dst_ipaddr.ipaddr,
1896                          buffer, sizeof(buffer)),
1897                request->proxy->dst_port);
1898
1899         /*
1900          *      Note that we set proxied BEFORE sending the packet.
1901          *
1902          *      Once we send it, the request is tainted, as
1903          *      another thread may have picked it up.  Don't
1904          *      touch it!
1905          */
1906         request->num_proxied_requests = 1;
1907         request->num_proxied_responses = 0;
1908 #ifdef HAVE_PTHREAD_H
1909         request->child_pid = NO_SUCH_CHILD_PID;
1910 #endif
1911         request->child_state = REQUEST_PROXIED;
1912
1913         DEBUG_PACKET(request, request->proxy, 1);
1914
1915         request->proxy_listener->send(request->proxy_listener,
1916                                       request);
1917         return 1;
1918 }
1919
1920
1921 /*
1922  *      "Proxy" the request by sending it to a new virtual server.
1923  */
1924 static int proxy_to_virtual_server(REQUEST *request)
1925 {
1926         REQUEST *fake;
1927         RAD_REQUEST_FUNP fun;
1928
1929         if (!request->home_server || !request->home_server->server) return 0;
1930
1931         if (request->parent) {
1932                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1933                 return 0;
1934         }
1935
1936         fake = request_alloc_fake(request);
1937         if (!fake) {
1938                 RDEBUG2("WARNING: Out of memory");
1939                 return 0;
1940         }
1941
1942         fake->packet->vps = paircopy(request->proxy->vps);
1943         fake->server = request->home_server->server;
1944
1945         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1946                 fun = rad_authenticate;
1947
1948 #ifdef WITH_ACCOUNTING
1949         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1950                 fun = rad_accounting;
1951 #endif
1952
1953         } else {
1954                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1955                 ev_request_free(&fake);
1956                 return 0;
1957         }
1958
1959         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1960         radius_handle_request(fake, fun);
1961         RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
1962
1963         if (fake->reply->code != 0) {
1964                 request->proxy_reply = fake->reply;
1965                 fake->reply = NULL;
1966         } else {
1967                 /*
1968                  *      There was no response
1969                  */
1970                 setup_post_proxy_fail(request);
1971         }
1972
1973         ev_request_free(&fake);
1974
1975         process_proxy_reply(request);
1976
1977         /*
1978          *      Process it through the normal section again, but ONLY
1979          *      if we received a proxy reply..
1980          */
1981         if (request->proxy_reply) {
1982                 if (request->server) RDEBUG("server %s {",
1983                                             request->server != NULL ?
1984                                             request->server : "");
1985                 fun(request);
1986
1987                 if (request->server) RDEBUG("} # server %s",
1988                                             request->server != NULL ?
1989                                             request->server : "");
1990         }
1991
1992         return 2;               /* success, but NOT '1' !*/
1993 }
1994
1995 /*
1996  *      Return 1 if we did proxy it, or the proxy attempt failed
1997  *      completely.  Either way, the caller doesn't touch the request
1998  *      any more if we return 1.
1999  */
2000 static int successfully_proxied_request(REQUEST *request)
2001 {
2002         int rcode;
2003         int pre_proxy_type = 0;
2004         VALUE_PAIR *realmpair;
2005         VALUE_PAIR *strippedname;
2006         VALUE_PAIR *vp;
2007         char *realmname = NULL;
2008         home_server *home;
2009         REALM *realm = NULL;
2010         home_pool_t *pool;
2011
2012         /*
2013          *      If it was already proxied, do nothing.
2014          *
2015          *      FIXME: This should really be a serious error.
2016          */
2017         if (request->in_proxy_hash ||
2018             (request->proxy_reply && (request->proxy_reply->code != 0))) {
2019                 return 0;
2020         }
2021
2022         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2023         if (!realmpair || (realmpair->length == 0)) {
2024                 int pool_type;
2025
2026                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2027                 if (!vp) return 0;
2028
2029                 switch (request->packet->code) {
2030                 case PW_AUTHENTICATION_REQUEST:
2031                         pool_type = HOME_TYPE_AUTH;
2032                         break;
2033
2034 #ifdef WITH_ACCOUNTING
2035                 case PW_ACCOUNTING_REQUEST:
2036                         pool_type = HOME_TYPE_ACCT;
2037                         break;
2038 #endif
2039
2040 #ifdef WITH_COA
2041                 case PW_COA_REQUEST:
2042                 case PW_DISCONNECT_REQUEST:
2043                         pool_type = HOME_TYPE_COA;
2044                         break;
2045 #endif
2046
2047                 default:
2048                         return 0;
2049                 }
2050
2051                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2052                 if (!pool) {
2053                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2054                                 vp->vp_strvalue);
2055                         return 0;
2056                 }
2057
2058                 realmname = NULL; /* no realms */
2059                 realm = NULL;
2060                 goto found_pool;
2061         }
2062
2063         realmname = (char *) realmpair->vp_strvalue;
2064
2065         realm = realm_find2(realmname);
2066         if (!realm) {
2067                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2068                 return 0;
2069         }
2070
2071         /*
2072          *      Figure out which pool to use.
2073          */
2074         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2075                 pool = realm->auth_pool;
2076
2077 #ifdef WITH_ACCOUNTING
2078         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2079                 pool = realm->acct_pool;
2080 #endif
2081
2082 #ifdef WITH_COA
2083         } else if ((request->packet->code == PW_COA_REQUEST) ||
2084                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2085                 pool = realm->acct_pool;
2086 #endif
2087
2088         } else {
2089                 rad_panic("Internal sanity check failed");
2090         }
2091
2092         if (!pool) {
2093                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2094                        realmname);
2095                 return 0;
2096         }
2097
2098 found_pool:
2099         home = home_server_ldb(realmname, pool, request);
2100         if (!home) {
2101                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2102                        realmname);
2103                 return -1;
2104         }
2105         request->home_pool = pool;
2106
2107 #ifdef WITH_COA
2108         /*
2109          *      Once we've decided to proxy a request, we cannot send
2110          *      a CoA packet.  So we free up any CoA packet here.
2111          */
2112         ev_request_free(&request->coa);
2113 #endif
2114         /*
2115          *      Remember that we sent the request to a Realm.
2116          */
2117         if (realmname) pairadd(&request->packet->vps,
2118                                pairmake("Realm", realmname, T_OP_EQ));
2119
2120         /*
2121          *      Strip the name, if told to.
2122          *
2123          *      Doing it here catches the case of proxied tunneled
2124          *      requests.
2125          */
2126         if (realm && (realm->striprealm == TRUE) &&
2127            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2128                 /*
2129                  *      If there's a Stripped-User-Name attribute in
2130                  *      the request, then use THAT as the User-Name
2131                  *      for the proxied request, instead of the
2132                  *      original name.
2133                  *
2134                  *      This is done by making a copy of the
2135                  *      Stripped-User-Name attribute, turning it into
2136                  *      a User-Name attribute, deleting the
2137                  *      Stripped-User-Name and User-Name attributes
2138                  *      from the vps list, and making the new
2139                  *      User-Name the head of the vps list.
2140                  */
2141                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2142                 if (!vp) {
2143                         vp = radius_paircreate(request, NULL,
2144                                                PW_USER_NAME, PW_TYPE_STRING);
2145                         rad_assert(vp != NULL); /* handled by above function */
2146                         /* Insert at the START of the list */
2147                         vp->next = request->proxy->vps;
2148                         request->proxy->vps = vp;
2149                 }
2150                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2151                        sizeof(vp->vp_strvalue));
2152                 vp->length = strippedname->length;
2153
2154                 /*
2155                  *      Do NOT delete Stripped-User-Name.
2156                  */
2157         }
2158
2159         /*
2160          *      If there is no PW_CHAP_CHALLENGE attribute but
2161          *      there is a PW_CHAP_PASSWORD we need to add it
2162          *      since we can't use the request authenticator
2163          *      anymore - we changed it.
2164          */
2165         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2166             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2167             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2168                 vp = radius_paircreate(request, &request->proxy->vps,
2169                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2170                 vp->length = AUTH_VECTOR_LEN;
2171                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2172         }
2173
2174         /*
2175          *      The RFC's say we have to do this, but FreeRADIUS
2176          *      doesn't need it.
2177          */
2178         vp = radius_paircreate(request, &request->proxy->vps,
2179                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2180         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2181                  request->packet->id);
2182         vp->length = strlen(vp->vp_strvalue);
2183
2184         /*
2185          *      Should be done BEFORE inserting into proxy hash, as
2186          *      pre-proxy may use this information, or change it.
2187          */
2188         request->proxy->code = request->packet->code;
2189
2190         /*
2191          *      Call the pre-proxy routines.
2192          */
2193         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2194         if (vp) {
2195                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2196                 pre_proxy_type = vp->vp_integer;
2197         }
2198
2199         rad_assert(request->home_pool != NULL);
2200
2201         if (request->home_pool->virtual_server) {
2202                 const char *old_server = request->server;
2203
2204                 request->server = request->home_pool->virtual_server;
2205                 RDEBUG2(" server %s {", request->server);
2206                 rcode = module_pre_proxy(pre_proxy_type, request);
2207                 RDEBUG2(" }");
2208                         request->server = old_server;
2209         } else {
2210                 rcode = module_pre_proxy(pre_proxy_type, request);
2211         }
2212         switch (rcode) {
2213         case RLM_MODULE_FAIL:
2214         case RLM_MODULE_INVALID:
2215         case RLM_MODULE_NOTFOUND:
2216         case RLM_MODULE_USERLOCK:
2217         default:
2218                 /* FIXME: debug print failed stuff */
2219                 return -1;
2220
2221         case RLM_MODULE_REJECT:
2222         case RLM_MODULE_HANDLED:
2223                 return 0;
2224
2225         /*
2226          *      Only proxy the packet if the pre-proxy code succeeded.
2227          */
2228         case RLM_MODULE_NOOP:
2229         case RLM_MODULE_OK:
2230         case RLM_MODULE_UPDATED:
2231                 break;
2232         }
2233
2234         /*
2235          *      If it's a fake request, don't send the proxy
2236          *      packet.  The outer tunnel session will take
2237          *      care of doing that.
2238          */
2239         if (request->packet->dst_port == 0) {
2240                 request->home_server = NULL;
2241                 return 1;
2242         }
2243
2244         if (request->home_server->server) {
2245                 return proxy_to_virtual_server(request);
2246         }
2247
2248         if (!proxy_request(request)) {
2249                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2250                 return -1;
2251         }
2252
2253         return 1;
2254 }
2255 #endif
2256
2257 static void request_post_handler(REQUEST *request)
2258 {
2259         int child_state = -1;
2260         struct timeval when;
2261         VALUE_PAIR *vp;
2262
2263         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2264             (request->parent &&
2265              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2266                 RDEBUG2("Request %d was cancelled.", request->number);
2267 #ifdef HAVE_PTHREAD_H
2268                 request->child_pid = NO_SUCH_CHILD_PID;
2269 #endif
2270                 child_state = REQUEST_DONE;
2271                 goto cleanup;
2272         }
2273
2274         if (request->child_state != REQUEST_RUNNING) {
2275                 rad_panic("Internal sanity check failed");
2276         }
2277
2278 #ifdef WITH_COA
2279         /*
2280          *      If it's not in the request hash, it's a CoA request.
2281          *      We hope.
2282          */
2283         if (!request->in_request_hash &&
2284             request->proxy &&
2285             ((request->proxy->code == PW_COA_REQUEST) ||
2286              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2287                 request->next_callback = NULL;
2288                 child_state = REQUEST_DONE;
2289                 goto cleanup;
2290         }
2291 #endif
2292
2293         if ((request->reply->code == 0) &&
2294             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2295             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2296                 request->reply->code = PW_AUTHENTICATION_REJECT;
2297         }
2298
2299 #ifdef WITH_PROXY
2300         if (request->root->proxy_requests &&
2301             !request->in_proxy_hash &&
2302             (request->reply->code == 0) &&
2303             (request->packet->dst_port != 0) &&
2304             (request->packet->code != PW_STATUS_SERVER)) {
2305                 int rcode = successfully_proxied_request(request);
2306
2307                 if (rcode == 1) return; /* request is invalid */
2308
2309                 /*
2310                  *      Failed proxying it (dead home servers, etc.)
2311                  *      Run it through Post-Proxy-Type = Fail, and
2312                  *      respond to the request.
2313                  *
2314                  *      Note that we're in a child thread here, so we
2315                  *      do NOT re-schedule the request.  Instead, we
2316                  *      do what we would have done, which is run the
2317                  *      pre-handler, a NULL request handler, and then
2318                  *      the post handler.
2319                  */
2320                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2321                         request_pre_handler(request);
2322                 }
2323
2324                 /*
2325                  *      Else we weren't supposed to proxy it,
2326                  *      OR we proxied it internally to a virutal server.
2327                  */
2328         }
2329 #endif
2330
2331         /*
2332          *      Fake requests don't get encoded or signed.  The caller
2333          *      also requires the reply VP's, so we don't free them
2334          *      here!
2335          */
2336         if (request->packet->dst_port == 0) {
2337                 /* FIXME: RDEBUG going to the next request */
2338 #ifdef HAVE_PTHREAD_H
2339                 request->child_pid = NO_SUCH_CHILD_PID;
2340 #endif
2341                 request->child_state = REQUEST_DONE;
2342                 return;
2343         }
2344
2345 #ifdef WITH_PROXY
2346         /*
2347          *      Copy Proxy-State from the request to the reply.
2348          */
2349         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2350         if (vp) pairadd(&request->reply->vps, vp);
2351 #endif
2352
2353         /*
2354          *      Access-Requests get delayed or cached.
2355          */
2356         switch (request->packet->code) {
2357         case PW_AUTHENTICATION_REQUEST:
2358                 gettimeofday(&request->next_when, NULL);
2359
2360                 if (request->reply->code == 0) {
2361                         /*
2362                          *      Check if the lack of response is intentional.
2363                          */
2364                         vp = pairfind(request->config_items,
2365                                       PW_RESPONSE_PACKET_TYPE);
2366                         if (!vp) {
2367                                 RDEBUG2("There was no response configured: rejecting request %d",
2368                                        request->number);
2369                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2370
2371                         } else if (vp->vp_integer == 256) {
2372                                 RDEBUG2("Not responding to request %d",
2373                                        request->number);
2374
2375                                 /*
2376                                  *      Force cleanup after a long
2377                                  *      time, so that we don't
2378                                  *      re-process the packet.
2379                                  */
2380                                 request->next_when.tv_sec += request->root->max_request_time;
2381                                 request->next_callback = cleanup_delay;
2382                                 child_state = REQUEST_CLEANUP_DELAY;
2383                                 break;
2384                         } else {
2385                                 request->reply->code = vp->vp_integer;
2386
2387                         }
2388                 }
2389
2390                 /*
2391                  *      Run rejected packets through
2392                  *
2393                  *      Post-Auth-Type = Reject
2394                  */
2395                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2396                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2397                         vp = radius_pairmake(request, &request->config_items,
2398                                              "Post-Auth-Type", "Reject",
2399                                              T_OP_SET);
2400                         if (vp) rad_postauth(request);
2401
2402                         /*
2403                          *      If configured, delay Access-Reject packets.
2404                          *
2405                          *      If request->root->reject_delay = 0, we discover
2406                          *      that we have to send the packet now.
2407                          */
2408                         when = request->received;
2409                         when.tv_sec += request->root->reject_delay;
2410
2411                         if (timercmp(&when, &request->next_when, >)) {
2412                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2413                                        request->number,
2414                                        request->root->reject_delay);
2415                                 request->next_when = when;
2416                                 request->next_callback = reject_delay;
2417 #ifdef HAVE_PTHREAD_H
2418                                 request->child_pid = NO_SUCH_CHILD_PID;
2419 #endif
2420                                 request->child_state = REQUEST_REJECT_DELAY;
2421                                 return;
2422                         }
2423                 }
2424
2425 #ifdef WITH_COA
2426         case PW_COA_REQUEST:
2427         case PW_DISCONNECT_REQUEST:
2428 #endif
2429                 request->next_when.tv_sec += request->root->cleanup_delay;
2430                 request->next_callback = cleanup_delay;
2431                 child_state = REQUEST_CLEANUP_DELAY;
2432                 break;
2433
2434         case PW_ACCOUNTING_REQUEST:
2435                 request->next_callback = NULL; /* just to be safe */
2436                 child_state = REQUEST_DONE;
2437                 break;
2438
2439                 /*
2440                  *      FIXME: Status-Server should probably not be
2441                  *      handled here...
2442                  */
2443         case PW_STATUS_SERVER:
2444                 request->next_callback = NULL;
2445                 child_state = REQUEST_DONE;
2446                 break;
2447
2448         default:
2449                 if ((request->packet->code > 1024) &&
2450                     (request->packet->code < (1024 + 254 + 1))) {
2451                         request->next_callback = NULL;
2452                         child_state = REQUEST_DONE;
2453                         break;
2454                 }
2455
2456                 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2457                 request->next_callback = NULL;
2458                 child_state = REQUEST_DONE;
2459                 break;
2460         }
2461
2462         /*
2463          *      Suppress "no reply" packets here, unless we're reading
2464          *      from the "detail" file.  In that case, we've got to
2465          *      tell the detail file handler that the request is dead,
2466          *      and it should re-send it.
2467          *      If configured, encode, sign, and send.
2468          */
2469         if ((request->reply->code != 0) ||
2470             (request->listener->type == RAD_LISTEN_DETAIL)) {
2471                 DEBUG_PACKET(request, request->reply, 1);
2472                 request->listener->send(request->listener, request);
2473         }
2474
2475 #ifdef WITH_COA
2476         /*
2477          *      Now that we've completely processed the request,
2478          *      see if we need to originate a CoA request.
2479          */
2480         if (request->coa ||
2481             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2482                 if (!originated_coa_request(request)) {
2483                         RDEBUG2("Do CoA Fail handler here");
2484                 }
2485                 /* request->coa is stil set, so we can update events */
2486         }
2487 #endif
2488
2489  cleanup:
2490         /*
2491          *      Clean up.  These are no longer needed.
2492          */
2493         pairfree(&request->config_items);
2494
2495         pairfree(&request->packet->vps);
2496         request->username = NULL;
2497         request->password = NULL;
2498
2499         pairfree(&request->reply->vps);
2500
2501 #ifdef WITH_PROXY
2502         if (request->proxy) {
2503                 pairfree(&request->proxy->vps);
2504
2505                 if (request->proxy_reply) {
2506                         pairfree(&request->proxy_reply->vps);
2507                 }
2508
2509 #if 0
2510                 /*
2511                  *      We're not tracking responses from the home
2512                  *      server, we can therefore free this memory in
2513                  *      the child thread.
2514                  */
2515                 if (!request->in_proxy_hash) {
2516                         rad_free(&request->proxy);
2517                         rad_free(&request->proxy_reply);
2518                         request->home_server = NULL;
2519                 }
2520 #endif
2521         }
2522 #endif
2523
2524         RDEBUG2("Finished request %d.", request->number);
2525         rad_assert(child_state >= 0);
2526         request->child_state = child_state;
2527
2528         /*
2529          *      Single threaded mode: update timers now.
2530          */
2531         if (!have_children) wait_a_bit(request);
2532 }
2533
2534
2535 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2536 {
2537 #ifdef WITH_PROXY
2538         char buffer[128];
2539 #endif
2540
2541         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2542         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2543
2544         switch (request->child_state) {
2545         case REQUEST_QUEUED:
2546         case REQUEST_RUNNING:
2547 #ifdef WITH_PROXY
2548         discard:
2549 #endif
2550                 radlog(L_ERR, "Discarding duplicate request from "
2551                        "client %s port %d - ID: %d due to unfinished request %d",
2552                        client->shortname,
2553                        request->packet->src_port,request->packet->id,
2554                        request->number);
2555                 break;
2556
2557 #ifdef WITH_PROXY
2558         case REQUEST_PROXIED:
2559                 /*
2560                  *      We're not supposed to have duplicate
2561                  *      accounting packets.  The other states handle
2562                  *      duplicates fine (discard, or send duplicate
2563                  *      reply).  But we do NOT want to retransmit an
2564                  *      accounting request here, because that would
2565                  *      involve updating the Acct-Delay-Time, and
2566                  *      therefore changing the packet Id, etc.
2567                  *
2568                  *      Instead, we just discard the packet.  We may
2569                  *      eventually respond, or the client will send a
2570                  *      new accounting packet.
2571                  *
2572                  *      The same comments go for Status-Server, and
2573                  *      other packet types.
2574                  *
2575                  *      FIXME: coa: when we proxy CoA && Disconnect
2576                  *      packets, this logic has to be fixed.
2577                  */
2578                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2579                         goto discard;
2580                 }
2581
2582                 check_for_zombie_home_server(request);
2583
2584                 /*
2585                  *      If we've just discovered that the home server is
2586                  *      dead, send the packet to another one.
2587                  */
2588                 if ((request->packet->dst_port != 0) &&
2589                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2590                         home_server *home;
2591
2592                         remove_from_proxy_hash(request);
2593
2594                         home = home_server_ldb(NULL, request->home_pool, request);
2595                         if (!home) {
2596                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2597                         no_home_servers:
2598                                 /*
2599                                  *      Do post-request processing,
2600                                  *      and any insertion of necessary
2601                                  *      events.
2602                                  */
2603                                 post_proxy_fail_handler(request);
2604                                 return;
2605                         }
2606
2607                         request->proxy->code = request->packet->code;
2608
2609                         /*
2610                          *      Free the old packet, to force re-encoding
2611                          */
2612                         free(request->proxy->data);
2613                         request->proxy->data = NULL;
2614                         request->proxy->data_len = 0;
2615
2616                         /*
2617                          *      This request failed over to a virtual
2618                          *      server.  Push it back onto the queue
2619                          *      to be processed.
2620                          */
2621                         if (request->home_server->server) {
2622                                 proxy_fallback_handler(request);
2623                                 return;
2624                         }
2625
2626                         /*
2627                          *      Try to proxy the request.
2628                          */
2629                         if (!proxy_request(request)) {
2630                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2631                                 goto no_home_servers;
2632                         }
2633
2634                         /*
2635                          *      This code executes in the main server
2636                          *      thread, so there's no need for locking.
2637                          */
2638                         rad_assert(request->next_callback != NULL);
2639                         INSERT_EVENT(request->next_callback, request);
2640                         request->next_callback = NULL;
2641                         return;
2642                 } /* else the home server is still alive */
2643
2644                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2645                        inet_ntop(request->proxy->dst_ipaddr.af,
2646                                  &request->proxy->dst_ipaddr.ipaddr,
2647                                  buffer, sizeof(buffer)),
2648                        request->proxy->dst_port,
2649                        request->proxy->id);
2650                 request->num_proxied_requests++;
2651
2652                 DEBUG_PACKET(request, request->proxy, 1);
2653                 request->proxy_listener->send(request->proxy_listener,
2654                                               request);
2655                 break;
2656 #endif
2657
2658         case REQUEST_REJECT_DELAY:
2659                 RDEBUG2("Waiting to send Access-Reject "
2660                        "to client %s port %d - ID: %d",
2661                        client->shortname,
2662                        request->packet->src_port, request->packet->id);
2663                 break;
2664
2665         case REQUEST_CLEANUP_DELAY:
2666         case REQUEST_DONE:
2667                 if (request->reply->code == 0) {
2668                         RDEBUG2("Ignoring retransmit from client %s port %d "
2669                                 "- ID: %d, no reply was configured",
2670                                 client->shortname,
2671                                 request->packet->src_port, request->packet->id);
2672                         return;
2673                 }
2674
2675                 /*
2676                  *      FIXME: This sends duplicate replies to
2677                  *      accounting requests, even if Acct-Delay-Time
2678                  *      or Event-Timestamp is in the packet.  In those
2679                  *      cases, the Id should be changed, and the packet
2680                  *      re-calculated.
2681                  */
2682                 RDEBUG2("Sending duplicate reply "
2683                        "to client %s port %d - ID: %d",
2684                        client->shortname,
2685                        request->packet->src_port, request->packet->id);
2686                 DEBUG_PACKET(request, request->reply, 1);
2687                 request->listener->send(request->listener, request);
2688                 break;
2689         }
2690 }
2691
2692
2693 static void received_conflicting_request(REQUEST *request,
2694                                          const RADCLIENT *client)
2695 {
2696         radlog(L_ERR, "Received conflicting packet from "
2697                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2698                client->shortname,
2699                request->packet->src_port, request->packet->id,
2700                request->number);
2701
2702         /*
2703          *      Nuke it from the request hash, so we can receive new
2704          *      packets.
2705          */
2706         remove_from_request_hash(request);
2707
2708         switch (request->child_state) {
2709 #ifdef HAVE_PTHREAD_H
2710                 /*
2711                  *      It's queued or running.  Tell it to stop, and
2712                  *      wait for it to do so.
2713                  */
2714         case REQUEST_QUEUED:
2715         case REQUEST_RUNNING:
2716                 request->master_state = REQUEST_STOP_PROCESSING;
2717                 request->delay += request->delay >> 1;
2718
2719                 tv_add(&request->when, request->delay);
2720
2721                 INSERT_EVENT(wait_for_child_to_die, request);
2722                 return;
2723 #endif
2724
2725                 /*
2726                  *      It's in some other state, and therefore also
2727                  *      in the event queue.  At some point, the
2728                  *      child will notice, and we can then delete it.
2729                  */
2730         default:
2731                 rad_assert(request->ev != NULL);
2732                 break;
2733         }
2734 }
2735
2736
2737 static int can_handle_new_request(RADIUS_PACKET *packet,
2738                                   RADCLIENT *client,
2739                                   struct main_config_t *root)
2740 {
2741         /*
2742          *      Count the total number of requests, to see if
2743          *      there are too many.  If so, return with an
2744          *      error.
2745          */
2746         if (root->max_requests) {
2747                 int request_count = fr_packet_list_num_elements(pl);
2748
2749                 /*
2750                  *      This is a new request.  Let's see if
2751                  *      it makes us go over our configured
2752                  *      bounds.
2753                  */
2754                 if (request_count > root->max_requests) {
2755                         radlog(L_ERR, "Dropping request (%d is too many): "
2756                                "from client %s port %d - ID: %d", request_count,
2757                                client->shortname,
2758                                packet->src_port, packet->id);
2759                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2760                                "\tThe value for 'max_requests' is probably set too low.\n");
2761                         return 0;
2762                 } /* else there were a small number of requests */
2763         } /* else there was no configured limit for requests */
2764
2765         /*
2766          *      FIXME: Add per-client checks.  If one client is sending
2767          *      too many packets, start discarding them.
2768          *
2769          *      We increment the counters here, and decrement them
2770          *      when the response is sent... somewhere in this file.
2771          */
2772
2773         /*
2774          *      FUTURE: Add checks for system load.  If the system is
2775          *      busy, start dropping requests...
2776          *
2777          *      We can probably keep some statistics ourselves...  if
2778          *      there are more requests coming in than we can handle,
2779          *      start dropping some.
2780          */
2781
2782         return 1;
2783 }
2784
2785
2786 int received_request(rad_listen_t *listener,
2787                      RADIUS_PACKET *packet, REQUEST **prequest,
2788                      RADCLIENT *client)
2789 {
2790         RADIUS_PACKET **packet_p;
2791         REQUEST *request = NULL;
2792         struct main_config_t *root = &mainconfig;
2793
2794         packet_p = fr_packet_list_find(pl, packet);
2795         if (packet_p) {
2796                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2797                 rad_assert(request->in_request_hash);
2798
2799                 if ((request->packet->data_len == packet->data_len) &&
2800                     (memcmp(request->packet->vector, packet->vector,
2801                             sizeof(packet->vector)) == 0)) {
2802                         received_retransmit(request, client);
2803                         return 0;
2804                 }
2805
2806                 /*
2807                  *      The new request is different from the old one,
2808                  *      but maybe the old is finished.  If so, delete
2809                  *      the old one.
2810                  */
2811                 switch (request->child_state) {
2812                         struct timeval when;
2813
2814                 default:
2815                         /*
2816                          *      Special hacks for race conditions.
2817                          *      The reply is encoded, and therefore
2818                          *      likely sent.  We received a *new*
2819                          *      packet from the client, likely before
2820                          *      the next line or two of code which
2821                          *      updated the child state.  In this
2822                          *      case, just accept the new request.
2823                          */
2824                         if ((request->reply->code != 0) &&
2825                             request->reply->data) {
2826                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2827                                        client->shortname,
2828                                        packet->src_port, packet->id,
2829                                        request->number);
2830                                 remove_from_request_hash(request);
2831                                 request = NULL;
2832                                 break;
2833                         }
2834
2835                         gettimeofday(&when, NULL);
2836                         when.tv_sec -= 1;
2837
2838                         /*
2839                          *      If the cached request was received
2840                          *      within the last second, then we
2841                          *      discard the NEW request instead of the
2842                          *      old one.  This will happen ONLY when
2843                          *      the client is severely broken, and is
2844                          *      sending conflicting packets very
2845                          *      quickly.
2846                          */
2847                         if (timercmp(&when, &request->received, <)) {
2848                                 radlog(L_ERR, "Discarding conflicting packet from "
2849                                        "client %s port %d - ID: %d due to recent request %d.",
2850                                        client->shortname,
2851                                        packet->src_port, packet->id,
2852                                        request->number);
2853                                 return 0;
2854                         }
2855
2856                         received_conflicting_request(request, client);
2857                         request = NULL;
2858                         break;
2859
2860                 case REQUEST_REJECT_DELAY:
2861                 case REQUEST_CLEANUP_DELAY:
2862                         request->child_state = REQUEST_DONE;
2863                 case REQUEST_DONE:
2864                         cleanup_delay(request);
2865                         request = NULL;
2866                         break;
2867                 }
2868         }
2869
2870         /*
2871          *      We may want to quench the new request.
2872          */
2873         if ((listener->type != RAD_LISTEN_DETAIL) &&
2874             !can_handle_new_request(packet, client, root)) {
2875                 return 0;
2876         }
2877
2878         /*
2879          *      Create and initialize the new request.
2880          */
2881         request = request_alloc(); /* never fails */
2882
2883         if ((request->reply = rad_alloc(0)) == NULL) {
2884                 radlog(L_ERR, "No memory");
2885                 exit(1);
2886         }
2887
2888         request->listener = listener;
2889         request->client = client;
2890         request->packet = packet;
2891         request->packet->timestamp = request->timestamp;
2892         request->number = request_num_counter++;
2893         request->priority = listener->type;
2894 #ifdef HAVE_PTHREAD_H
2895         request->child_pid = NO_SUCH_CHILD_PID;
2896 #endif
2897
2898         /*
2899          *      Status-Server packets go to the head of the queue.
2900          */
2901         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2902
2903         /*
2904          *      Set virtual server identity
2905          */
2906         if (client->server) {
2907                 request->server = client->server;
2908         } else if (listener->server) {
2909                 request->server = listener->server;
2910         } else {
2911                 request->server = NULL;
2912         }
2913
2914         /*
2915          *      Remember the request in the list.
2916          */
2917         if (!fr_packet_list_insert(pl, &request->packet)) {
2918                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2919                 ev_request_free(&request);
2920                 return 0;
2921         }
2922
2923         request->in_request_hash = TRUE;
2924         request->root = root;
2925         root->refcount++;
2926
2927         /*
2928          *      The request passes many of our sanity checks.
2929          *      From here on in, if anything goes wrong, we
2930          *      send a reject message, instead of dropping the
2931          *      packet.
2932          */
2933
2934         /*
2935          *      Build the reply template from the request.
2936          */
2937
2938         request->reply->sockfd = request->packet->sockfd;
2939         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2940         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2941         request->reply->dst_port = request->packet->src_port;
2942         request->reply->src_port = request->packet->dst_port;
2943         request->reply->id = request->packet->id;
2944         request->reply->code = 0; /* UNKNOWN code */
2945         memcpy(request->reply->vector, request->packet->vector,
2946                sizeof(request->reply->vector));
2947         request->reply->vps = NULL;
2948         request->reply->data = NULL;
2949         request->reply->data_len = 0;
2950
2951         request->master_state = REQUEST_ACTIVE;
2952         request->child_state = REQUEST_QUEUED;
2953         request->next_callback = NULL;
2954
2955         gettimeofday(&request->received, NULL);
2956         request->timestamp = request->received.tv_sec;
2957         request->when = request->received;
2958
2959         request->delay = USEC;
2960
2961         tv_add(&request->when, request->delay);
2962
2963         INSERT_EVENT(wait_a_bit, request);
2964
2965         *prequest = request;
2966         return 1;
2967 }
2968
2969
2970 #ifdef WITH_PROXY
2971 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2972 {
2973         char            buffer[128];
2974         REQUEST         *request;
2975
2976         /*
2977          *      Also removes from the proxy hash if responses == requests
2978          */
2979         request = lookup_in_proxy_hash(packet);
2980
2981         if (!request) {
2982                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2983                        inet_ntop(packet->src_ipaddr.af,
2984                                  &packet->src_ipaddr.ipaddr,
2985                                  buffer, sizeof(buffer)),
2986                        packet->src_port, packet->id);
2987                 return NULL;
2988         }
2989
2990         /*
2991          *      We haven't replied to the NAS, but we have seen an
2992          *      earlier reply from the home server.  Ignore this packet,
2993          *      as we're likely still processing the previous reply.
2994          */
2995         if (request->proxy_reply) {
2996                 if (memcmp(request->proxy_reply->vector,
2997                            packet->vector,
2998                            sizeof(request->proxy_reply->vector)) == 0) {
2999                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
3000                                inet_ntop(packet->src_ipaddr.af,
3001                                          &packet->src_ipaddr.ipaddr,
3002                                          buffer, sizeof(buffer)),
3003                                packet->src_port, packet->id,
3004                                request->number);
3005                 } else {
3006                         /*
3007                          *      ? The home server gave us a new proxy
3008                          *      reply which doesn't match the old
3009                          *      one.  Delete it.
3010                          */
3011                         RDEBUG2("Ignoring conflicting proxy reply");
3012                 }
3013
3014                 /* assert that there's an event queued for request? */
3015                 return NULL;
3016         }
3017
3018         /*
3019          *      Verify the packet before doing ANYTHING with it.  This
3020          *      means we're doing more MD5 checks in the server core.
3021          *      However, we can fix that by moving to multiple threads
3022          *      listening on sockets.
3023          *
3024          *      We do this AFTER looking the request up in the hash,
3025          *      and AFTER vhecking if we saw a previous request.  This
3026          *      helps minimize the DoS effect of people attacking us
3027          *      with spoofed packets.
3028          */
3029         if (rad_verify(packet, request->proxy,
3030                        request->home_server->secret) != 0) {
3031                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3032                 return NULL;
3033         }
3034
3035         gettimeofday(&now, NULL);
3036
3037         /*
3038          *      Maybe move this earlier in the decision process?
3039          *      Having it here means that late or duplicate proxy
3040          *      replies no longer get the home server marked as
3041          *      "alive".  This might be good for stability, though.
3042          *
3043          *      FIXME: Do we really want to do this whenever we
3044          *      receive a packet?  Setting this here means that we
3045          *      mark it alive on *any* packet, even if it's lost all
3046          *      of the *other* packets in the last 10s.
3047          */
3048         request->home_server->state = HOME_STATE_ALIVE;
3049
3050 #ifdef WITH_COA
3051         /*
3052          *      When originating CoA, the "proxy" reply is the reply
3053          *      to the CoA request that we originated.  At this point,
3054          *      the original request is finished, and it has a reply.
3055          *
3056          *      However, if we haven't separated the two requests, do
3057          *      so now.  This is done so that cleaning up the original
3058          *      request won't cause the CoA request to be free'd.  See
3059          *      util.c, request_free()
3060          */
3061         if (request->parent && (request->parent->coa == request)) {
3062                 request->parent->coa = NULL;
3063                 request->parent = NULL;
3064
3065         } else
3066                 /*
3067                  *      Skip the next set of checks, as the original
3068                  *      reply is cached.  We want to be able to still
3069                  *      process the CoA reply, AND to reference the
3070                  *      original request/reply.
3071                  *
3072                  *      This is getting to be really quite a bit of a
3073                  *      hack.
3074                  */
3075 #endif
3076
3077         /*
3078          *      If there's a reply to the NAS, ignore everything
3079          *      related to proxy responses
3080          */
3081         if (request->reply && request->reply->code != 0) {
3082                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3083                 return NULL;
3084         }
3085
3086 #ifdef WITH_STATS
3087         /*
3088          *      The average includes our time to receive packets and
3089          *      look them up in the hashes, which should be the same
3090          *      for all packets.
3091          *
3092          *      We update the response time only for the FIRST packet
3093          *      we receive.
3094          */
3095         if (request->home_server->ema.window > 0) {
3096                 radius_stats_ema(&request->home_server->ema,
3097                                  &now, &request->proxy_when);
3098         }
3099 #endif
3100
3101         switch (request->child_state) {
3102         case REQUEST_QUEUED:
3103         case REQUEST_RUNNING:
3104                 radlog(L_ERR, "Internal sanity check failed for child state");
3105                 /* FALL-THROUGH */
3106
3107         case REQUEST_REJECT_DELAY:
3108         case REQUEST_CLEANUP_DELAY:
3109         case REQUEST_DONE:
3110                 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'",
3111                        inet_ntop(packet->src_ipaddr.af,
3112                                  &packet->src_ipaddr.ipaddr,
3113                                  buffer, sizeof(buffer)),
3114                        packet->src_port, packet->id,
3115                        request->number);
3116                 /* assert that there's an event queued for request? */
3117                 return NULL;
3118
3119         case REQUEST_PROXIED:
3120                 break;
3121         }
3122
3123         request->proxy_reply = packet;
3124
3125 #if 0
3126         /*
3127          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3128          *      Note that we only do so on the first response.
3129          */
3130         if ((request->num_proxied_responses == 1)
3131                 int rtt;
3132                 home_server *home = request->home_server;
3133
3134                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3135                 rtt *= USEC;
3136                 rtt += now.tv_usec;
3137                 rtt -= request->proxy_when.tv_usec;
3138
3139                 if (!home->has_rtt) {
3140                         home->has_rtt = TRUE;
3141
3142                         home->srtt = rtt;
3143                         home->rttvar = rtt / 2;
3144
3145                 } else {
3146                         home->rttvar -= home->rttvar >> 2;
3147                         home->rttvar += (home->srtt - rtt);
3148                         home->srtt -= home->srtt >> 3;
3149                         home->srtt += rtt >> 3;
3150                 }
3151
3152                 home->rto = home->srtt;
3153                 if (home->rttvar > (USEC / 4)) {
3154                         home->rto += home->rttvar * 4;
3155                 } else {
3156                         home->rto += USEC;
3157                 }
3158         }
3159 #endif
3160
3161         /*
3162          *      There's no incoming request, so it's a proxied packet
3163          *      we originated.
3164          */
3165         if (!request->packet) {
3166                 received_response_to_ping(request);
3167                 request->proxy_reply = NULL; /* caller will free it */
3168                 ev_request_free(&request);
3169                 return NULL;
3170         }
3171
3172         request->child_state = REQUEST_QUEUED;
3173         request->when = now;
3174         request->delay = USEC;
3175         request->priority = RAD_LISTEN_PROXY;
3176         tv_add(&request->when, request->delay);
3177
3178         /*
3179          *      Wait a bit will take care of max_request_time
3180          */
3181         INSERT_EVENT(wait_a_bit, request);
3182
3183         return request;
3184 }
3185 #endif
3186
3187 void event_new_fd(rad_listen_t *this)
3188 {
3189         char buffer[1024];
3190
3191         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3192
3193         this->print(this, buffer, sizeof(buffer));
3194
3195         if (this->status == RAD_LISTEN_STATUS_INIT) {
3196                 if (just_started) {
3197                         DEBUG("Listening on %s", buffer);
3198                 } else {
3199                         DEBUG2(" ... adding new socket %s", buffer);
3200                 }
3201                 if (!fr_event_fd_insert(el, 0, this->fd,
3202                                         event_socket_handler, this)) {
3203                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3204                         exit(1);
3205                 }
3206
3207                 this->status = RAD_LISTEN_STATUS_KNOWN;
3208                 return;
3209         }
3210
3211         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3212                 DEBUG2(" ... closing socket %s", buffer);
3213
3214                 fr_event_fd_delete(el, 0, this->fd);
3215                 this->status = RAD_LISTEN_STATUS_FINISH;
3216
3217                 /*
3218                  *      Close the fd AFTER fixing up the requests and
3219                  *      listeners, so that they don't send/recv on the
3220                  *      wrong socket (if someone manages to open
3221                  *      another one).
3222                  */
3223                 close(this->fd);
3224                 this->fd = -1;
3225         }
3226 }
3227
3228 static void handle_signal_self(int flag)
3229 {
3230         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3231                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3232                         fr_event_loop_exit(el, 1);
3233                 } else {
3234                         fr_event_loop_exit(el, 2);
3235                 }
3236
3237                 return;
3238         } /* else exit/term flags weren't set */
3239
3240         /*
3241          *      Tell the even loop to stop processing.
3242          */
3243         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3244                 time_t when;
3245                 static time_t last_hup = 0;
3246
3247                 DEBUG("Received HUP signal.");
3248
3249                 when = time(NULL);
3250                 if ((int) (when - last_hup) < 5) {
3251                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3252                         return;
3253                 }
3254                 last_hup = when;
3255
3256                 fr_event_loop_exit(el, 0x80);
3257         }
3258
3259 #ifdef WITH_DETAIL
3260         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3261                 rad_listen_t *this;
3262
3263                 /*
3264                  *      FIXME: O(N) loops suck.
3265                  */
3266                 for (this = mainconfig.listen;
3267                      this != NULL;
3268                      this = this->next) {
3269                         if (this->type != RAD_LISTEN_DETAIL) continue;
3270
3271                         /*
3272                          *      This one didn't send the signal, skip
3273                          *      it.
3274                          */
3275                         if (!this->decode(this, NULL)) continue;
3276
3277                         /*
3278                          *      Go service the interrupt.
3279                          */
3280                         event_poll_detail(this);
3281                 }
3282         }
3283 #endif
3284
3285         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3286                 rad_listen_t *this;
3287
3288                 for (this = mainconfig.listen;
3289                      this != NULL;
3290                      this = this->next) {
3291                         event_new_fd(this);
3292                 }
3293         }
3294 }
3295
3296 #ifndef WITH_SELF_PIPE
3297 void radius_signal_self(int flag)
3298 {
3299         handle_signal_self(flag);
3300 }
3301 #else
3302 /*
3303  *      Inform ourselves that we received a signal.
3304  */
3305 void radius_signal_self(int flag)
3306 {
3307         ssize_t rcode;
3308         uint8_t buffer[16];
3309
3310         /*
3311          *      The read MUST be non-blocking for this to work.
3312          */
3313         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3314         if (rcode > 0) {
3315                 ssize_t i;
3316
3317                 for (i = 0; i < rcode; i++) {
3318                         buffer[0] |= buffer[i];
3319                 }
3320         } else {
3321                 buffer[0] = 0;
3322         }
3323
3324         buffer[0] |= flag;
3325
3326         write(self_pipe[1], buffer, 1);
3327 }
3328
3329
3330 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3331                                  UNUSED int fd, UNUSED void *ctx)
3332 {
3333         ssize_t i, rcode;
3334         uint8_t buffer[32];
3335
3336         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3337         if (rcode <= 0) return;
3338
3339         /*
3340          *      Merge pending signals.
3341          */
3342         for (i = 0; i < rcode; i++) {
3343                 buffer[0] |= buffer[i];
3344         }
3345
3346         handle_signal_self(buffer[0]);
3347 }
3348 #endif
3349
3350
3351 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3352                                  void *ctx)
3353 {
3354         rad_listen_t *listener = ctx;
3355         RAD_REQUEST_FUNP fun;
3356         REQUEST *request;
3357
3358         rad_assert(xel == el);
3359
3360         xel = xel;
3361
3362         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3363
3364         if (!listener->recv(listener, &fun, &request)) return;
3365
3366         if (!thread_pool_addrequest(request, fun)) {
3367                 request->child_state = REQUEST_DONE;
3368         }
3369 }
3370
3371 typedef struct listen_detail_t {
3372         fr_event_t      *ev;
3373 } listen_detail_t;
3374
3375 /*
3376  *      This function is called periodically to see if this detail
3377  *      file is available for reading.
3378  */
3379 static void event_poll_detail(void *ctx)
3380 {
3381         int rcode, delay;
3382         RAD_REQUEST_FUNP fun;
3383         REQUEST *request;
3384         rad_listen_t *this = ctx;
3385         struct timeval when;
3386         listen_detail_t *detail = this->data;
3387
3388         rad_assert(this->type == RAD_LISTEN_DETAIL);
3389
3390         /*
3391          *      Try to read something.
3392          *
3393          *      FIXME: This does poll AND receive.
3394          */
3395         rcode = this->recv(this, &fun, &request);
3396         if (rcode != 0) {
3397                 rad_assert(fun != NULL);
3398                 rad_assert(request != NULL);
3399
3400                 if (!thread_pool_addrequest(request, fun)) {
3401                         request->child_state = REQUEST_DONE;
3402                 }
3403         }
3404
3405         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3406         when = now;
3407
3408         /*
3409          *      Backdoor API to get the delay until the next poll
3410          *      time.
3411          */
3412         delay = this->encode(this, NULL);
3413         tv_add(&when, delay);
3414
3415         if (!fr_event_insert(el, event_poll_detail, this,
3416                              &when, &detail->ev)) {
3417                 radlog(L_ERR, "Failed creating handler");
3418                 exit(1);
3419         }
3420 }
3421
3422
3423 static void event_status(struct timeval *wake)
3424 {
3425 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3426         int argval;
3427 #endif
3428
3429         if (debug_flag == 0) {
3430                 if (just_started) {
3431                         radlog(L_INFO, "Ready to process requests.");
3432                         just_started = FALSE;
3433                 }
3434                 return;
3435         }
3436
3437         if (!wake) {
3438                 DEBUG("Ready to process requests.");
3439
3440         } else if ((wake->tv_sec != 0) ||
3441                    (wake->tv_usec >= 100000)) {
3442                 DEBUG("Waking up in %d.%01u seconds.",
3443                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3444         }
3445
3446
3447         /*
3448          *      FIXME: Put this somewhere else, where it isn't called
3449          *      all of the time...
3450          */
3451
3452 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3453         /*
3454          *      If there are no child threads, then there may
3455          *      be child processes.  In that case, wait for
3456          *      their exit status, and throw that exit status
3457          *      away.  This helps get rid of zxombie children.
3458          */
3459         while (waitpid(-1, &argval, WNOHANG) > 0) {
3460                 /* do nothing */
3461         }
3462 #endif
3463
3464 }
3465
3466 /*
3467  *      Externally-visibly functions.
3468  */
3469 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3470 {
3471         rad_listen_t *this, *head = NULL;
3472
3473         if (el) return 0;
3474
3475         time(&fr_start_time);
3476
3477         el = fr_event_list_create(event_status);
3478         if (!el) return 0;
3479
3480         pl = fr_packet_list_create(0);
3481         if (!pl) return 0;      /* leak el */
3482
3483         request_num_counter = 0;
3484
3485 #ifdef WITH_PROXY
3486         if (mainconfig.proxy_requests) {
3487                 pthread_mutexattr_t attr;
3488
3489                 /*
3490                  *      Create the tree for managing proxied requests and
3491                  *      responses.
3492                  */
3493                 proxy_list = fr_packet_list_create(1);
3494                 if (!proxy_list) return 0;
3495
3496 #ifdef HAVE_PTHREAD_H
3497                 pthread_mutexattr_init(&attr);
3498
3499 #ifdef PTHREAD_MUTEX_RECURSIVE
3500                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3501                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3502                                strerror(errno));
3503                         exit(1);
3504                 }
3505 #endif
3506
3507                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3508                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3509                                strerror(errno));
3510                         exit(1);
3511                 }
3512
3513                 pthread_mutexattr_destroy(&attr);
3514 #endif
3515         }
3516 #endif
3517
3518         /*
3519          *      Just before we spawn the child threads, force the log
3520          *      subsystem to re-open the log file for every write.
3521          */
3522         if (spawn_flag) force_log_reopen();
3523
3524 #ifdef HAVE_PTHREAD_H
3525 #ifndef __MINGW32__
3526         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3527 #else
3528         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3529 #endif
3530         /*
3531          *      Initialize the threads ONLY if we're spawning, AND
3532          *      we're running normally.
3533          */
3534         if (spawn_flag && !check_config &&
3535             (thread_pool_init(cs, &spawn_flag) < 0)) {
3536                 exit(1);
3537         }
3538 #endif
3539
3540         /*
3541          *      Move all of the thread calls to this file?
3542          *
3543          *      It may be best for the mutexes to be in this file...
3544          */
3545         have_children = spawn_flag;
3546
3547         if (check_config) {
3548                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3549                        mainconfig.name);
3550                 return 1;
3551         }
3552
3553 #ifdef WITH_SELF_PIPE
3554         /*
3555          *      Child threads need a pipe to signal us, as do the
3556          *      signal handlers.
3557          */
3558         if (pipe(self_pipe) < 0) {
3559                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3560                        strerror(errno));
3561                 exit(1);
3562         }
3563         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3564                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3565                        strerror(errno));
3566                 exit(1);
3567         }
3568         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3569                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3570                        strerror(errno));
3571                 exit(1);
3572         }
3573
3574         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3575                                   event_signal_handler, el)) {
3576                 radlog(L_ERR, "Failed creating handler for signals");
3577                 exit(1);
3578         }
3579 #endif  /* WITH_SELF_PIPE */
3580
3581 #ifdef WITH_PROXY
3582         /*
3583          *      Mark the proxy Fd's as unused.
3584          */
3585         {
3586                 int i;
3587
3588                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3589         }
3590 #endif
3591
3592        DEBUG("%s: #### Opening IP addresses and Ports ####",
3593                mainconfig.name);
3594
3595        /*
3596         *       The server temporarily switches to an unprivileged
3597         *       user very early in the bootstrapping process.
3598         *       However, some sockets MAY require privileged access
3599         *       (bind to device, or to port < 1024, or to raw
3600         *       sockets).  Those sockets need to call suid up/down
3601         *       themselves around the functions that need a privileged
3602         *       uid.
3603         */
3604         if (listen_init(cs, &head) < 0) {
3605                 _exit(1);
3606         }
3607
3608         /*
3609          *      At this point, no one has any business *ever* going
3610          *      back to root uid.
3611          */
3612         fr_suid_down_permanent();
3613
3614         /*
3615          *      Add all of the sockets to the event loop.
3616          */
3617         for (this = head;
3618              this != NULL;
3619              this = this->next) {
3620                 char buffer[256];
3621
3622                 this->print(this, buffer, sizeof(buffer));
3623
3624                 switch (this->type) {
3625 #ifdef WITH_DETAIL
3626                 case RAD_LISTEN_DETAIL:
3627                         DEBUG("Listening on %s", buffer);
3628
3629                         /*
3630                          *      Detail files are always known, and aren't
3631                          *      put into the socket event loop.
3632                          */
3633                         this->status = RAD_LISTEN_STATUS_KNOWN;
3634
3635                         /*
3636                          *      Set up the first poll interval.
3637                          */
3638                         event_poll_detail(this);
3639                         break;
3640 #endif
3641
3642 #ifdef WITH_PROXY
3643                 case RAD_LISTEN_PROXY:
3644                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3645                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3646
3647                         proxy_fds[this->fd & 0x1f] = this->fd;
3648                         proxy_listeners[this->fd & 0x1f] = this;
3649                         if (!fr_packet_list_socket_add(proxy_list,
3650                                                          this->fd)) {
3651                                 rad_assert(0 == 1);
3652                         }
3653                         /* FALL-THROUGH */
3654 #endif
3655
3656                 default:
3657                         break;
3658                 }
3659
3660                 event_new_fd(this);
3661         }
3662
3663         mainconfig.listen = head;
3664
3665         return 1;
3666 }
3667
3668
3669 static int request_hash_cb(UNUSED void *ctx, void *data)
3670 {
3671         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3672
3673 #ifdef WITH_PROXY
3674         rad_assert(request->in_proxy_hash == FALSE);
3675 #endif
3676
3677         ev_request_free(&request);
3678
3679         return 0;
3680 }
3681
3682
3683 #ifdef WITH_PROXY
3684 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3685 {
3686         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3687
3688         ev_request_free(&request);
3689
3690         return 0;
3691 }
3692 #endif
3693
3694 void radius_event_free(void)
3695 {
3696         /*
3697          *      FIXME: Stop all threads, or at least check that
3698          *      they're all waiting on the semaphore, and the queues
3699          *      are empty.
3700          */
3701
3702 #ifdef WITH_PROXY
3703         /*
3704          *      There are requests in the proxy hash that aren't
3705          *      referenced from anywhere else.  Remove them first.
3706          */
3707         if (proxy_list) {
3708                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3709                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3710                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3711                 fr_packet_list_free(proxy_list);
3712                 proxy_list = NULL;
3713         }
3714 #endif
3715
3716         fr_packet_list_walk(pl, NULL, request_hash_cb);
3717
3718         fr_packet_list_free(pl);
3719         pl = NULL;
3720
3721         fr_event_list_free(el);
3722 }
3723
3724 int radius_event_process(void)
3725 {
3726         if (!el) return 0;
3727
3728         return fr_event_loop(el);
3729 }
3730
3731 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3732 {
3733         request->options = RAD_REQUEST_OPTION_DEBUG2;
3734
3735         if (request_pre_handler(request)) {
3736                 rad_assert(fun != NULL);
3737                 rad_assert(request != NULL);
3738
3739                 if (request->server) RDEBUG("server %s {",
3740                                             request->server != NULL ?
3741                                             request->server : "");
3742                 fun(request);
3743
3744                 if (request->server) RDEBUG("} # server %s",
3745                                              request->server != NULL ?
3746                                             request->server : "");
3747
3748                 request_post_handler(request);
3749         }
3750
3751         DEBUG2("Going to the next request");
3752         return;
3753 }