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         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 962                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 963
 964         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 965                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 966
 967 #ifdef WITH_COA
 968                 /*
 969                  *      See no_response_to_coa_request
 970                  */
 971         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 972                 request->packet->code &= 0xff; /* restore it */
 973
 974                 if (request->proxy->code == PW_COA_REQUEST) {
 975                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 976
 977                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 978                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 979                 } else {
 980                         return 0;
 981                 }
 982
 983 #endif
 984         } else {
 985                 return 0;
 986         }
 987
 988         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 989
 990         if (!dval) {
 991                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 992                 return 0;
 993         }
 994
 995         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 996         if (!vp) vp = radius_paircreate(request, &request->config_items,
 997                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
 998         vp->vp_integer = dval->value;
 999
1000         rad_assert(request->proxy_reply == NULL);
1001
1002         return 1;
1003 }
1004
1005
1006 static int null_handler(UNUSED REQUEST *request)
1007 {
1008         return 0;
1009 }
1010
1011 static void post_proxy_fail_handler(REQUEST *request)
1012 {
1013         /*
1014          *      A proper time is required for wait_a_bit.
1015          */
1016         request->delay = USEC / 10;
1017         gettimeofday(&now, NULL);
1018
1019         /*
1020          *      Not set up to run Post-Proxy-Type = Fail.
1021          *
1022          *      Mark the request as still running, and figure out what
1023          *      to do next.
1024          */
1025         if (!setup_post_proxy_fail(request)) {
1026                 request->child_state = REQUEST_RUNNING;
1027                 request_post_handler(request);
1028
1029         } else {
1030                 /*
1031                  *      Re-queue the request.
1032                  */
1033                 request->child_state = REQUEST_QUEUED;
1034
1035                 /*
1036                  *      There is a post-proxy-type of fail.  We run
1037                  *      the request through the pre/post proxy
1038                  *      handlers, just like it was a real proxied
1039                  *      request.  However, we set the per-request
1040                  *      handler to NULL, as we don't want to do
1041                  *      anything else.
1042                  *
1043                  *      Note that when we're not threaded, this will
1044                  *      process the request even if it's greater than
1045                  *      max_request_time.  That's not fatal.
1046                  */
1047                 request->priority = 0;
1048                 rad_assert(request->proxy != NULL);
1049                 thread_pool_addrequest(request, null_handler);
1050         }
1051
1052         /*
1053          *      MAY free the request if we're over max_request_time,
1054          *      AND we're not in threaded mode!
1055          *
1056          *      Note that we call this ONLY if we're threaded, as
1057          *      if we're NOT threaded, request_post_handler() calls
1058          *      wait_a_bit(), which means that "request" may not
1059          *      exist any more...
1060          */
1061         if (have_children) wait_a_bit(request);
1062 }
1063
1064
1065 /* maybe check this against wait_for_proxy_id_to_expire? */
1066 static void no_response_to_proxied_request(void *ctx)
1067 {
1068         REQUEST *request = ctx;
1069         home_server *home;
1070         char buffer[128];
1071
1072         rad_assert(request->magic == REQUEST_MAGIC);
1073         rad_assert(request->child_state == REQUEST_PROXIED);
1074
1075         /*
1076          *      If we've failed over to an internal home server,
1077          *      replace the callback with the correct one.  This
1078          *      is due to locking issues with child threads...
1079          */
1080         if (request->home_server->server) {
1081                 wait_a_bit(request);
1082                 return;
1083         }
1084
1085         radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1086                request->number,
1087                inet_ntop(request->proxy->dst_ipaddr.af,
1088                          &request->proxy->dst_ipaddr.ipaddr,
1089                          buffer, sizeof(buffer)),
1090                request->proxy->dst_port);
1091
1092         check_for_zombie_home_server(request);
1093
1094         home = request->home_server;
1095
1096         post_proxy_fail_handler(request);
1097
1098         /*
1099          *      Don't touch request due to race conditions
1100          */
1101         if (home->state == HOME_STATE_IS_DEAD) {
1102                 rad_assert(home->ev != NULL); /* or it will never wake up */
1103                 return;
1104         }
1105
1106         /*
1107          *      Enable the zombie period when we notice that the home
1108          *      server hasn't responded.  We do NOT back-date the start
1109          *      of the zombie period.
1110          */
1111         if (home->state == HOME_STATE_ALIVE) {
1112                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1113                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1114                                  buffer, sizeof(buffer)),
1115                        home->port);
1116                 home->state = HOME_STATE_ZOMBIE;
1117                 home->zombie_period_start = now;
1118
1119                 /*
1120                  *      Start pinging the home server.
1121                  */
1122                 ping_home_server(home);
1123         }
1124 }
1125 #endif
1126
1127 static void wait_a_bit(void *ctx)
1128 {
1129         struct timeval when;
1130         REQUEST *request = ctx;
1131         fr_event_callback_t callback = NULL;
1132
1133         rad_assert(request->magic == REQUEST_MAGIC);
1134
1135 #ifdef WITH_COA
1136         /*
1137          *      The CoA request is a new (internally generated)
1138          *      request, created in a child thread.  We therefore need
1139          *      some way to tie its events back into the main event
1140          *      handler.
1141          */
1142         if (request->coa && !request->coa->proxy_reply &&
1143             request->coa->next_callback) {
1144                 request->coa->when = request->coa->next_when;
1145                 INSERT_EVENT(request->coa->next_callback, request->coa);
1146                 request->coa->next_callback = NULL;
1147                 request->coa->parent = NULL;
1148                 request->coa = NULL;
1149         }
1150 #endif
1151
1152         switch (request->child_state) {
1153         case REQUEST_QUEUED:
1154         case REQUEST_RUNNING:
1155                 when = request->received;
1156                 when.tv_sec += request->root->max_request_time;
1157
1158                 /*
1159                  *      Normally called from the event loop with the
1160                  *      proper event loop time.  Otherwise, called from
1161                  *      post proxy fail handler, which sets "now", and
1162                  *      this call won't re-set it, because we're not
1163                  *      in the event loop.
1164                  */
1165                 fr_event_now(el, &now);
1166
1167                 /*
1168                  *      Request still has more time.  Continue
1169                  *      waiting.
1170                  */
1171                 if (timercmp(&now, &when, <) ||
1172                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1173                      (request->child_state == REQUEST_QUEUED))) {
1174                         if (request->delay < (USEC / 10)) {
1175                                 request->delay = USEC / 10;
1176                         }
1177                         request->delay += request->delay >> 1;
1178
1179 #ifdef WITH_DETAIL
1180                         /*
1181                          *      Cap wait at some sane value for detail
1182                          *      files.
1183                          */
1184                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1185                             (request->delay > (request->root->max_request_time * USEC))) {
1186                                 request->delay = request->root->max_request_time * USEC;
1187                         }
1188 #endif
1189
1190                         request->when = now;
1191                         tv_add(&request->when, request->delay);
1192                         callback = wait_a_bit;
1193                         break;
1194                 }
1195
1196 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1197                 /*
1198                  *      A child thread MAY still be running on the
1199                  *      request.  Ask the thread to stop working on
1200                  *      the request.
1201                  */
1202                 if (have_children) {
1203                         /* FIXME: kill unresponsive children? */
1204
1205                         /*
1206                          *      Print this error message ONLY if
1207                          *      there's a child currently processing
1208                          *      the request.  As we don't have thread
1209                          *      locks here, there may be race
1210                          *      conditions on this check.  But it's
1211                          *      just an error message, so that's OK.
1212                          */
1213                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1214                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1215                                        request->number,
1216                                        request->module ? request->module : "<server core>",
1217                                        request->component ? request->component : "<server core>");
1218                         }
1219
1220                         request->master_state = REQUEST_STOP_PROCESSING;
1221
1222                         request->delay = USEC / 4;
1223                         tv_add(&request->when, request->delay);
1224                         callback = wait_for_child_to_die;
1225                         break;
1226                 }
1227 #endif
1228
1229                 /*
1230                  *      Else there are no child threads.  We probably
1231                  *      should have just marked the request as 'done'
1232                  *      elsewhere, like in the post-proxy-fail
1233                  *      handler.  But doing that would involve
1234                  *      checking for max_request_time in multiple
1235                  *      places, so this may be simplest.
1236                  */
1237                 request->child_state = REQUEST_DONE;
1238                 /* FALL-THROUGH */
1239
1240                 /*
1241                  *      Mark the request as no longer running,
1242                  *      and clean it up.
1243                  */
1244         case REQUEST_DONE:
1245 #ifdef HAVE_PTHREAD_H
1246                 request->child_pid = NO_SUCH_CHILD_PID;
1247 #endif
1248
1249 #ifdef WTH_COA
1250                 /*
1251                  *      This is a CoA request.  It's been divorced
1252                  *      from everything else, so we clean it up now.
1253                  */
1254                 if (!request->in_request_hash &&
1255                     request->proxy &&
1256                     (request->packet->code != request->proxy->code) &&
1257                     ((request->proxy->code == PW_COA_REQUEST) ||
1258                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1259                         /*
1260                          *      FIXME: Do CoA MIBs
1261                          */
1262                         ev_request_free(&request);
1263                         return;
1264                 }
1265 #endif
1266                 request_stats_final(request);
1267                 cleanup_delay(request);
1268                 return;
1269
1270         case REQUEST_REJECT_DELAY:
1271         case REQUEST_CLEANUP_DELAY:
1272 #ifdef HAVE_PTHREAD_H
1273                 request->child_pid = NO_SUCH_CHILD_PID;
1274 #endif
1275                 request_stats_final(request);
1276
1277         case REQUEST_PROXIED:
1278                 rad_assert(request->next_callback != NULL);
1279                 rad_assert(request->next_callback != wait_a_bit);
1280
1281                 request->when = request->next_when;
1282                 callback = request->next_callback;
1283                 request->next_callback = NULL;
1284                 break;
1285
1286         default:
1287                 rad_panic("Internal sanity check failure");
1288                 return;
1289         }
1290
1291         /*
1292          *      Something major went wrong.  Discard the request, and
1293          *      keep running.
1294          *
1295          *      FIXME: No idea why this happens or how to fix it...
1296          *      It seems to happen *only* when requests are proxied,
1297          *      and where the home server doesn't respond.  So it looks
1298          *      like a race condition above, but it happens in debug
1299          *      mode, with no threads...
1300          */
1301         if (!callback) {
1302                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1303                 ev_request_free(&request);
1304                 return;
1305         }
1306
1307         INSERT_EVENT(callback, request);
1308 }
1309
1310 #ifdef WITH_COA
1311 static void no_response_to_coa_request(void *ctx)
1312 {
1313         REQUEST *request = ctx;
1314         char buffer[128];
1315
1316         rad_assert(request->magic == REQUEST_MAGIC);
1317         rad_assert(request->child_state == REQUEST_PROXIED);
1318         rad_assert(request->home_server != NULL);
1319         rad_assert(!request->in_request_hash);
1320
1321         radlog(L_ERR, "No response to CoA request sent to %s",
1322                inet_ntop(request->proxy->dst_ipaddr.af,
1323                          &request->proxy->dst_ipaddr.ipaddr,
1324                          buffer, sizeof(buffer)));
1325
1326         /*
1327          *      Hack.
1328          */
1329         request->packet->code |= (PW_COA_REQUEST << 8);
1330         post_proxy_fail_handler(request);
1331 }
1332
1333
1334 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1335 {
1336         VALUE_PAIR *vp;
1337
1338         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1339         if (!vp) return 0;
1340
1341         vp->vp_date = when;
1342
1343         if (packet->data) {
1344                 free(packet->data);
1345                 packet->data = NULL;
1346                 packet->data_len = 0;
1347         }
1348
1349         return 1;               /* time stamp updated */
1350 }
1351
1352
1353 /*
1354  *      Called when we haven't received a response to a CoA request.
1355  */
1356 static void retransmit_coa_request(void *ctx)
1357 {
1358         int delay, frac;
1359         struct timeval mrd;
1360         REQUEST *request = ctx;
1361
1362         rad_assert(request->magic == REQUEST_MAGIC);
1363         rad_assert(request->child_state == REQUEST_PROXIED);
1364         rad_assert(request->home_server != NULL);
1365         rad_assert(!request->in_request_hash);
1366         rad_assert(request->parent == NULL);
1367
1368         fr_event_now(el, &now);
1369
1370         /*
1371          *      Cap count at MRC, if it is non-zero.
1372          */
1373         if (request->home_server->coa_mrc &&
1374             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1375                 no_response_to_coa_request(request);
1376                 return;
1377         }
1378
1379         /*
1380          *      RFC 5080 Section 2.2.1
1381          *
1382          *      RT = 2*RTprev + RAND*RTprev
1383          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1384          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1385          */
1386         delay = fr_rand();
1387         delay ^= (delay >> 16);
1388         delay &= 0xffff;
1389         frac = request->delay / 5;
1390         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1391
1392         delay += (2 * request->delay) - (request->delay / 10);
1393
1394         /*
1395          *      Cap delay at MRT, if MRT is non-zero.
1396          */
1397         if (request->home_server->coa_mrt &&
1398             (delay > (request->home_server->coa_mrt * USEC))) {
1399                 int mrt_usec = request->home_server->coa_mrt * USEC;
1400
1401                 /*
1402                  *      delay = MRT + RAND * MRT
1403                  *            = 0.9 MRT + rand(0,.2)  * MRT
1404                  */
1405                 delay = fr_rand();
1406                 delay ^= (delay >> 15);
1407                 delay &= 0x1ffff;
1408                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1409                 delay += mrt_usec - (mrt_usec / 10);
1410         }
1411
1412         request->delay = delay;
1413         request->when = now;
1414         tv_add(&request->when, request->delay);
1415         mrd = request->proxy_when;
1416         mrd.tv_sec += request->home_server->coa_mrd;
1417
1418         /*
1419          *      Cap duration at MRD.
1420          */
1421         if (timercmp(&mrd, &request->when, <)) {
1422                 request->when = mrd;
1423                 INSERT_EVENT(no_response_to_coa_request, request);
1424
1425         } else {
1426                 INSERT_EVENT(retransmit_coa_request, request);
1427         }
1428
1429         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1430                 if (!insert_into_proxy_hash(request, TRUE)) {
1431                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1432                         return;
1433                 }
1434
1435                 request->num_proxied_requests = 0;
1436                 request->num_proxied_responses = 0;
1437         }
1438
1439         request->num_proxied_requests++;
1440         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1441
1442         request->proxy_listener->send(request->proxy_listener,
1443                                       request);
1444 }
1445
1446
1447 /*
1448  *      The original request is either DONE, or in CLEANUP_DELAY.
1449  */
1450 static int originated_coa_request(REQUEST *request)
1451 {
1452         int delay, rcode, pre_proxy_type = 0;
1453         VALUE_PAIR *vp;
1454         REQUEST *coa;
1455         fr_ipaddr_t ipaddr;
1456         char buffer[256];
1457
1458         rad_assert(request->proxy == NULL);
1459         rad_assert(!request->in_proxy_hash);
1460         rad_assert(request->proxy_reply == NULL);
1461
1462         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1463         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1464         if (vp) {
1465                 if (vp->vp_integer == 0) {
1466                         ev_request_free(&request->coa);
1467                         return 1;       /* success */
1468                 }
1469
1470                 if (!request->coa) request_alloc_coa(request);
1471                 if (!request->coa) return 0;
1472         }
1473
1474         coa = request->coa;
1475
1476         /*
1477          *      src_ipaddr will be set up in proxy_encode.
1478          */
1479         memset(&ipaddr, 0, sizeof(ipaddr));
1480         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1481         if (vp) {
1482                 ipaddr.af = AF_INET;
1483                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1484
1485         } else if ((vp = pairfind(coa->proxy->vps,
1486                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1487                 ipaddr.af = AF_INET6;
1488                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1489
1490         } else if ((vp = pairfind(coa->proxy->vps,
1491                                   PW_HOME_SERVER_POOL)) != NULL) {
1492                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1493                                                   HOME_TYPE_COA);
1494                 if (!coa->home_pool) {
1495                         RDEBUG2("WARNING: No such home_server_pool %s",
1496                                vp->vp_strvalue);
1497         fail:
1498                         ev_request_free(&request->coa);
1499                         return 0;
1500                 }
1501
1502                 /*
1503                  *      Prefer
1504                  */
1505         } else if (request->client->coa_pool) {
1506                 coa->home_pool = request->client->coa_pool;
1507
1508         } else if (request->client->coa_server) {
1509                 coa->home_server = request->client->coa_server;
1510
1511         } else {
1512                 /*
1513                  *      If all else fails, send it to the client that
1514                  *      originated this request.
1515                  */
1516                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1517         }
1518
1519         /*
1520          *      Use the pool, if it exists.
1521          */
1522         if (coa->home_pool) {
1523                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1524                 if (!coa->home_server) {
1525                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1526                         goto fail;
1527                 }
1528
1529         } else if (!coa->home_server) {
1530                 int port = PW_COA_UDP_PORT;
1531
1532                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1533                 if (vp) port = vp->vp_integer;
1534
1535                 coa->home_server = home_server_find(&ipaddr, port);
1536                 if (!coa->home_server) {
1537                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1538                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1539                                          buffer, sizeof(buffer)), port);
1540                         goto fail;
1541                 }
1542         }
1543
1544         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1545         if (vp) {
1546                 switch (vp->vp_integer) {
1547                 case PW_COA_REQUEST:
1548                 case PW_DISCONNECT_REQUEST:
1549                         coa->proxy->code = vp->vp_integer;
1550                         break;
1551
1552                 default:
1553                         DEBUG("Cannot set CoA Packet-Type to code %d",
1554                               vp->vp_integer);
1555                         goto fail;
1556                 }
1557         }
1558
1559         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1560
1561         /*
1562          *      The rest of the server code assumes that
1563          *      request->packet && request->reply exist.  Copy them
1564          *      from the original request.
1565          */
1566         rad_assert(coa->packet != NULL);
1567         rad_assert(coa->packet->vps == NULL);
1568         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1569         coa->packet->vps = paircopy(request->packet->vps);
1570         coa->packet->data = NULL;
1571         rad_assert(coa->reply != NULL);
1572         rad_assert(coa->reply->vps == NULL);
1573         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1574         coa->reply->vps = paircopy(request->reply->vps);
1575         coa->reply->data = NULL;
1576         coa->config_items = paircopy(request->config_items);
1577
1578         /*
1579          *      Call the pre-proxy routines.
1580          */
1581         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1582         if (vp) {
1583                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1584                 pre_proxy_type = vp->vp_integer;
1585         }
1586
1587         if (coa->home_pool && coa->home_pool->virtual_server) {
1588                 const char *old_server = coa->server;
1589
1590                 coa->server = coa->home_pool->virtual_server;
1591                 RDEBUG2(" server %s {", coa->server);
1592                 rcode = module_pre_proxy(pre_proxy_type, coa);
1593                 RDEBUG2(" }");
1594                 coa->server = old_server;
1595         } else {
1596                 rcode = module_pre_proxy(pre_proxy_type, coa);
1597         }
1598         switch (rcode) {
1599         default:
1600                 goto fail;
1601
1602         /*
1603          *      Only send the CoA packet if the pre-proxy code succeeded.
1604          */
1605         case RLM_MODULE_NOOP:
1606         case RLM_MODULE_OK:
1607         case RLM_MODULE_UPDATED:
1608                 break;
1609         }
1610
1611         /*
1612          *      Source IP / port is set when the proxy socket
1613          *      is chosen.
1614          */
1615         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1616         coa->proxy->dst_port = coa->home_server->port;
1617
1618         if (!insert_into_proxy_hash(coa, FALSE)) {
1619                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1620                 goto fail;
1621         }
1622
1623         /*
1624          *      We CANNOT divorce the CoA request from the parent
1625          *      request.  This function is running in a child thread,
1626          *      and we need access to the main event loop in order to
1627          *      to add the timers for the CoA packet.  See
1628          *      wait_a_bit().
1629          */
1630
1631         /*
1632          *      Forget about the original request completely at this
1633          *      point.
1634          */
1635         request = coa;
1636
1637         gettimeofday(&request->proxy_when, NULL);
1638         request->received = request->next_when = request->proxy_when;
1639         rad_assert(request->proxy_reply == NULL);
1640
1641         /*
1642          *      Implement re-transmit algorithm as per RFC 5080
1643          *      Section 2.2.1.
1644          *
1645          *      We want IRT + RAND*IRT
1646          *      or 0.9 IRT + rand(0,.2) IRT
1647          *
1648          *      2^20 ~ USEC, and we want 2.
1649          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1650          */
1651         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1652         request->delay = delay * request->home_server->coa_irt;
1653         delay = request->home_server->coa_irt * USEC;
1654         delay -= delay / 10;
1655         delay += request->delay;
1656
1657         request->delay = delay;
1658         tv_add(&request->next_when, delay);
1659         request->next_callback = retransmit_coa_request;
1660
1661         /*
1662          *      Note that we set proxied BEFORE sending the packet.
1663          *
1664          *      Once we send it, the request is tainted, as
1665          *      another thread may have picked it up.  Don't
1666          *      touch it!
1667          */
1668         request->num_proxied_requests = 1;
1669         request->num_proxied_responses = 0;
1670         request->child_pid = NO_SUCH_CHILD_PID;
1671
1672         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1673
1674         request->child_state = REQUEST_PROXIED;
1675
1676         DEBUG_PACKET(request, request->proxy, 1);
1677
1678         request->proxy_listener->send(request->proxy_listener,
1679                                       request);
1680         return 1;
1681 }
1682 #endif  /* WITH_COA */
1683
1684 #ifdef WITH_PROXY
1685 static int process_proxy_reply(REQUEST *request)
1686 {
1687         int rcode;
1688         int post_proxy_type = 0;
1689         VALUE_PAIR *vp;
1690
1691         /*
1692          *      Delete any reply we had accumulated until now.
1693          */
1694         pairfree(&request->reply->vps);
1695
1696         /*
1697          *      Run the packet through the post-proxy stage,
1698          *      BEFORE playing games with the attributes.
1699          */
1700         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1701         if (vp) {
1702                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1703                 post_proxy_type = vp->vp_integer;
1704         }
1705
1706         if (request->home_pool && request->home_pool->virtual_server) {
1707                 const char *old_server = request->server;
1708
1709                 request->server = request->home_pool->virtual_server;
1710                 RDEBUG2(" server %s {", request->server);
1711                 rcode = module_post_proxy(post_proxy_type, request);
1712                 RDEBUG2(" }");
1713                 request->server = old_server;
1714         } else {
1715                 rcode = module_post_proxy(post_proxy_type, request);
1716         }
1717
1718 #ifdef WITH_COA
1719         if (request->packet->code == request->proxy->code)
1720           /*
1721            *    Don't run the next bit if we originated a CoA
1722            *    packet, after receiving an Access-Request or
1723            *    Accounting-Request.
1724            */
1725 #endif
1726
1727         /*
1728          *      There may NOT be a proxy reply, as we may be
1729          *      running Post-Proxy-Type = Fail.
1730          */
1731         if (request->proxy_reply) {
1732                 /*
1733                  *      Delete the Proxy-State Attributes from
1734                  *      the reply.  These include Proxy-State
1735                  *      attributes from us and remote server.
1736                  */
1737                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1738
1739                 /*
1740                  *      Add the attributes left in the proxy
1741                  *      reply to the reply list.
1742                  */
1743                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1744                 request->proxy_reply->vps = NULL;
1745
1746                 /*
1747                  *      Free proxy request pairs.
1748                  */
1749                 pairfree(&request->proxy->vps);
1750         }
1751
1752         switch (rcode) {
1753         default:  /* Don't do anything */
1754                 break;
1755         case RLM_MODULE_FAIL:
1756                 /* FIXME: debug print stuff */
1757                 request->child_state = REQUEST_DONE;
1758                 return 0;
1759
1760         case RLM_MODULE_HANDLED:
1761                 /* FIXME: debug print stuff */
1762                 request->child_state = REQUEST_DONE;
1763                 return 0;
1764         }
1765
1766         return 1;
1767 }
1768 #endif
1769
1770 static int request_pre_handler(REQUEST *request)
1771 {
1772         int rcode;
1773
1774         rad_assert(request->magic == REQUEST_MAGIC);
1775         rad_assert(request->packet != NULL);
1776
1777         request->child_state = REQUEST_RUNNING;
1778
1779         /*
1780          *      Don't decode the packet if it's an internal "fake"
1781          *      request.  Instead, just return so that the caller can
1782          *      process it.
1783          */
1784         if (request->packet->dst_port == 0) {
1785                 request->username = pairfind(request->packet->vps,
1786                                              PW_USER_NAME);
1787                 request->password = pairfind(request->packet->vps,
1788                                              PW_USER_PASSWORD);
1789                 return 1;
1790         }
1791
1792 #ifdef WITH_PROXY
1793         /*
1794          *      Put the decoded packet into it's proper place.
1795          */
1796         if (request->proxy_reply != NULL) {
1797                 rcode = request->proxy_listener->decode(request->proxy_listener,
1798                                                         request);
1799                 DEBUG_PACKET(request, request->proxy_reply, 0);
1800         } else
1801 #endif
1802         if (request->packet->vps == NULL) {
1803                 rcode = request->listener->decode(request->listener, request);
1804
1805                 if (debug_condition) {
1806                         int result = FALSE;
1807                         const char *my_debug = debug_condition;
1808
1809                         /*
1810                          *      Ignore parse errors.
1811                          */
1812                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1813                                                   &my_debug, 1,
1814                                                   &result);
1815                         if (result) {
1816                                 request->options = 2;
1817                                 request->radlog = radlog_request;
1818                         }
1819                 }
1820
1821                 DEBUG_PACKET(request, request->packet, 0);
1822         } else {
1823                 rcode = 0;
1824         }
1825
1826         if (rcode < 0) {
1827                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1828                 request->child_state = REQUEST_DONE;
1829                 return 0;
1830         }
1831
1832         if (!request->username) {
1833                 request->username = pairfind(request->packet->vps,
1834                                              PW_USER_NAME);
1835         }
1836
1837 #ifdef WITH_PROXY
1838         if (request->proxy) {
1839                 return process_proxy_reply(request);
1840 #endif
1841         }
1842
1843         return 1;
1844 }
1845
1846
1847 #ifdef WITH_PROXY
1848 /*
1849  *      Do state handling when we proxy a request.
1850  */
1851 static int proxy_request(REQUEST *request)
1852 {
1853         struct timeval when;
1854         char buffer[128];
1855
1856         if (request->home_server->server) {
1857                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1858                 return 0;
1859         }
1860
1861         if (!insert_into_proxy_hash(request, FALSE)) {
1862                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1863                 return 0;
1864         }
1865
1866         request->proxy_listener->encode(request->proxy_listener, request);
1867
1868         when = request->received;
1869         when.tv_sec += request->root->max_request_time;
1870
1871         gettimeofday(&request->proxy_when, NULL);
1872
1873         request->next_when = request->proxy_when;
1874         request->next_when.tv_sec += request->home_server->response_window;
1875
1876         rad_assert(request->home_server->response_window > 0);
1877
1878         if (timercmp(&when, &request->next_when, <)) {
1879                 request->next_when = when;
1880         }
1881         request->next_callback = no_response_to_proxied_request;
1882
1883         RDEBUG2("Proxying request %d to home server %s port %d",
1884                request->number,
1885                inet_ntop(request->proxy->dst_ipaddr.af,
1886                          &request->proxy->dst_ipaddr.ipaddr,
1887                          buffer, sizeof(buffer)),
1888                request->proxy->dst_port);
1889
1890         /*
1891          *      Note that we set proxied BEFORE sending the packet.
1892          *
1893          *      Once we send it, the request is tainted, as
1894          *      another thread may have picked it up.  Don't
1895          *      touch it!
1896          */
1897         request->num_proxied_requests = 1;
1898         request->num_proxied_responses = 0;
1899 #ifdef HAVE_PTHREAD_H
1900         request->child_pid = NO_SUCH_CHILD_PID;
1901 #endif
1902         request->child_state = REQUEST_PROXIED;
1903
1904         DEBUG_PACKET(request, request->proxy, 1);
1905
1906         request->proxy_listener->send(request->proxy_listener,
1907                                       request);
1908         return 1;
1909 }
1910
1911
1912 /*
1913  *      "Proxy" the request by sending it to a new virtual server.
1914  */
1915 static int proxy_to_virtual_server(REQUEST *request)
1916 {
1917         REQUEST *fake;
1918         RAD_REQUEST_FUNP fun;
1919
1920         if (!request->home_server || !request->home_server->server) return 0;
1921
1922         if (request->parent) {
1923                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1924                 return 0;
1925         }
1926
1927         fake = request_alloc_fake(request);
1928         if (!fake) {
1929                 RDEBUG2("WARNING: Out of memory");
1930                 return 0;
1931         }
1932
1933         fake->packet->vps = paircopy(request->proxy->vps);
1934         fake->server = request->home_server->server;
1935
1936         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1937                 fun = rad_authenticate;
1938
1939 #ifdef WITH_ACCOUNTING
1940         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1941                 fun = rad_accounting;
1942 #endif
1943
1944         } else {
1945                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1946                 ev_request_free(&fake);
1947                 return 0;
1948         }
1949
1950         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1951         radius_handle_request(fake, fun);
1952         RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
1953
1954         if (fake->reply->code != 0) {
1955                 request->proxy_reply = fake->reply;
1956                 fake->reply = NULL;
1957         } else {
1958                 /*
1959                  *      There was no response
1960                  */
1961                 setup_post_proxy_fail(request);
1962         }
1963
1964         ev_request_free(&fake);
1965
1966         process_proxy_reply(request);
1967
1968         /*
1969          *      Process it through the normal section again, but ONLY
1970          *      if we received a proxy reply..
1971          */
1972         if (request->proxy_reply) {
1973                 if (request->server) RDEBUG("server %s {",
1974                                             request->server != NULL ?
1975                                             request->server : "");
1976                 fun(request);
1977
1978                 if (request->server) RDEBUG("} # server %s",
1979                                             request->server != NULL ?
1980                                             request->server : "");
1981         }
1982
1983         return 2;               /* success, but NOT '1' !*/
1984 }
1985
1986 /*
1987  *      Return 1 if we did proxy it, or the proxy attempt failed
1988  *      completely.  Either way, the caller doesn't touch the request
1989  *      any more if we return 1.
1990  */
1991 static int successfully_proxied_request(REQUEST *request)
1992 {
1993         int rcode;
1994         int pre_proxy_type = 0;
1995         VALUE_PAIR *realmpair;
1996         VALUE_PAIR *strippedname;
1997         VALUE_PAIR *vp;
1998         char *realmname = NULL;
1999         home_server *home;
2000         REALM *realm = NULL;
2001         home_pool_t *pool;
2002
2003         /*
2004          *      If it was already proxied, do nothing.
2005          *
2006          *      FIXME: This should really be a serious error.
2007          */
2008         if (request->in_proxy_hash ||
2009             (request->proxy_reply && (request->proxy_reply->code != 0))) {
2010                 return 0;
2011         }
2012
2013         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2014         if (!realmpair || (realmpair->length == 0)) {
2015                 int pool_type;
2016
2017                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2018                 if (!vp) return 0;
2019
2020                 switch (request->packet->code) {
2021                 case PW_AUTHENTICATION_REQUEST:
2022                         pool_type = HOME_TYPE_AUTH;
2023                         break;
2024
2025 #ifdef WITH_ACCOUNTING
2026                 case PW_ACCOUNTING_REQUEST:
2027                         pool_type = HOME_TYPE_ACCT;
2028                         break;
2029 #endif
2030
2031 #ifdef WITH_COA
2032                 case PW_COA_REQUEST:
2033                 case PW_DISCONNECT_REQUEST:
2034                         pool_type = HOME_TYPE_COA;
2035                         break;
2036 #endif
2037
2038                 default:
2039                         return 0;
2040                 }
2041
2042                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2043                 if (!pool) {
2044                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2045                                 vp->vp_strvalue);
2046                         return 0;
2047                 }
2048
2049                 realmname = NULL; /* no realms */
2050                 realm = NULL;
2051                 goto found_pool;
2052         }
2053
2054         realmname = (char *) realmpair->vp_strvalue;
2055
2056         realm = realm_find2(realmname);
2057         if (!realm) {
2058                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2059                 return 0;
2060         }
2061
2062         /*
2063          *      Figure out which pool to use.
2064          */
2065         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2066                 pool = realm->auth_pool;
2067
2068 #ifdef WITH_ACCOUNTING
2069         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2070                 pool = realm->acct_pool;
2071 #endif
2072
2073 #ifdef WITH_COA
2074         } else if ((request->packet->code == PW_COA_REQUEST) ||
2075                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2076                 pool = realm->acct_pool;
2077 #endif
2078
2079         } else {
2080                 rad_panic("Internal sanity check failed");
2081         }
2082
2083         if (!pool) {
2084                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2085                        realmname);
2086                 return 0;
2087         }
2088
2089 found_pool:
2090         home = home_server_ldb(realmname, pool, request);
2091         if (!home) {
2092                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2093                        realmname);
2094                 return -1;
2095         }
2096         request->home_pool = pool;
2097
2098 #ifdef WITH_COA
2099         /*
2100          *      Once we've decided to proxy a request, we cannot send
2101          *      a CoA packet.  So we free up any CoA packet here.
2102          */
2103         ev_request_free(&request->coa);
2104 #endif
2105         /*
2106          *      Remember that we sent the request to a Realm.
2107          */
2108         if (realmname) pairadd(&request->packet->vps,
2109                                pairmake("Realm", realmname, T_OP_EQ));
2110
2111         /*
2112          *      Strip the name, if told to.
2113          *
2114          *      Doing it here catches the case of proxied tunneled
2115          *      requests.
2116          */
2117         if (realm && (realm->striprealm == TRUE) &&
2118            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2119                 /*
2120                  *      If there's a Stripped-User-Name attribute in
2121                  *      the request, then use THAT as the User-Name
2122                  *      for the proxied request, instead of the
2123                  *      original name.
2124                  *
2125                  *      This is done by making a copy of the
2126                  *      Stripped-User-Name attribute, turning it into
2127                  *      a User-Name attribute, deleting the
2128                  *      Stripped-User-Name and User-Name attributes
2129                  *      from the vps list, and making the new
2130                  *      User-Name the head of the vps list.
2131                  */
2132                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2133                 if (!vp) {
2134                         vp = radius_paircreate(request, NULL,
2135                                                PW_USER_NAME, PW_TYPE_STRING);
2136                         rad_assert(vp != NULL); /* handled by above function */
2137                         /* Insert at the START of the list */
2138                         vp->next = request->proxy->vps;
2139                         request->proxy->vps = vp;
2140                 }
2141                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2142                        sizeof(vp->vp_strvalue));
2143                 vp->length = strippedname->length;
2144
2145                 /*
2146                  *      Do NOT delete Stripped-User-Name.
2147                  */
2148         }
2149
2150         /*
2151          *      If there is no PW_CHAP_CHALLENGE attribute but
2152          *      there is a PW_CHAP_PASSWORD we need to add it
2153          *      since we can't use the request authenticator
2154          *      anymore - we changed it.
2155          */
2156         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2157             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2158             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2159                 vp = radius_paircreate(request, &request->proxy->vps,
2160                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2161                 vp->length = AUTH_VECTOR_LEN;
2162                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2163         }
2164
2165         /*
2166          *      The RFC's say we have to do this, but FreeRADIUS
2167          *      doesn't need it.
2168          */
2169         vp = radius_paircreate(request, &request->proxy->vps,
2170                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2171         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2172                  request->packet->id);
2173         vp->length = strlen(vp->vp_strvalue);
2174
2175         /*
2176          *      Should be done BEFORE inserting into proxy hash, as
2177          *      pre-proxy may use this information, or change it.
2178          */
2179         request->proxy->code = request->packet->code;
2180
2181         /*
2182          *      Call the pre-proxy routines.
2183          */
2184         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2185         if (vp) {
2186                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2187                 pre_proxy_type = vp->vp_integer;
2188         }
2189
2190         rad_assert(request->home_pool != NULL);
2191
2192         if (request->home_pool->virtual_server) {
2193                 const char *old_server = request->server;
2194
2195                 request->server = request->home_pool->virtual_server;
2196                 RDEBUG2(" server %s {", request->server);
2197                 rcode = module_pre_proxy(pre_proxy_type, request);
2198                 RDEBUG2(" }");
2199                         request->server = old_server;
2200         } else {
2201                 rcode = module_pre_proxy(pre_proxy_type, request);
2202         }
2203         switch (rcode) {
2204         case RLM_MODULE_FAIL:
2205         case RLM_MODULE_INVALID:
2206         case RLM_MODULE_NOTFOUND:
2207         case RLM_MODULE_USERLOCK:
2208         default:
2209                 /* FIXME: debug print failed stuff */
2210                 return -1;
2211
2212         case RLM_MODULE_REJECT:
2213         case RLM_MODULE_HANDLED:
2214                 return 0;
2215
2216         /*
2217          *      Only proxy the packet if the pre-proxy code succeeded.
2218          */
2219         case RLM_MODULE_NOOP:
2220         case RLM_MODULE_OK:
2221         case RLM_MODULE_UPDATED:
2222                 break;
2223         }
2224
2225         /*
2226          *      If it's a fake request, don't send the proxy
2227          *      packet.  The outer tunnel session will take
2228          *      care of doing that.
2229          */
2230         if (request->packet->dst_port == 0) {
2231                 request->home_server = NULL;
2232                 return 1;
2233         }
2234
2235         if (request->home_server->server) {
2236                 return proxy_to_virtual_server(request);
2237         }
2238
2239         if (!proxy_request(request)) {
2240                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2241                 return -1;
2242         }
2243
2244         return 1;
2245 }
2246 #endif
2247
2248 static void request_post_handler(REQUEST *request)
2249 {
2250         int child_state = -1;
2251         struct timeval when;
2252         VALUE_PAIR *vp;
2253
2254         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2255             (request->parent &&
2256              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2257                 RDEBUG2("Request %d was cancelled.", request->number);
2258 #ifdef HAVE_PTHREAD_H
2259                 request->child_pid = NO_SUCH_CHILD_PID;
2260 #endif
2261                 child_state = REQUEST_DONE;
2262                 goto cleanup;
2263         }
2264
2265         if (request->child_state != REQUEST_RUNNING) {
2266                 rad_panic("Internal sanity check failed");
2267         }
2268
2269 #ifdef WITH_COA
2270         /*
2271          *      If it's not in the request hash, it's a CoA request.
2272          *      We hope.
2273          */
2274         if (!request->in_request_hash &&
2275             request->proxy &&
2276             ((request->proxy->code == PW_COA_REQUEST) ||
2277              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2278                 request->next_callback = NULL;
2279                 child_state = REQUEST_DONE;
2280                 goto cleanup;
2281         }
2282 #endif
2283
2284         if ((request->reply->code == 0) &&
2285             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2286             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2287                 request->reply->code = PW_AUTHENTICATION_REJECT;
2288         }
2289
2290 #ifdef WITH_PROXY
2291         if (request->root->proxy_requests &&
2292             !request->in_proxy_hash &&
2293             (request->reply->code == 0) &&
2294             (request->packet->dst_port != 0) &&
2295             (request->packet->code != PW_STATUS_SERVER)) {
2296                 int rcode = successfully_proxied_request(request);
2297
2298                 if (rcode == 1) return; /* request is invalid */
2299
2300                 /*
2301                  *      Failed proxying it (dead home servers, etc.)
2302                  *      Run it through Post-Proxy-Type = Fail, and
2303                  *      respond to the request.
2304                  *
2305                  *      Note that we're in a child thread here, so we
2306                  *      do NOT re-schedule the request.  Instead, we
2307                  *      do what we would have done, which is run the
2308                  *      pre-handler, a NULL request handler, and then
2309                  *      the post handler.
2310                  */
2311                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2312                         request_pre_handler(request);
2313                 }
2314
2315                 /*
2316                  *      Else we weren't supposed to proxy it,
2317                  *      OR we proxied it internally to a virutal server.
2318                  */
2319         }
2320 #endif
2321
2322         /*
2323          *      Fake requests don't get encoded or signed.  The caller
2324          *      also requires the reply VP's, so we don't free them
2325          *      here!
2326          */
2327         if (request->packet->dst_port == 0) {
2328                 /* FIXME: RDEBUG going to the next request */
2329 #ifdef HAVE_PTHREAD_H
2330                 request->child_pid = NO_SUCH_CHILD_PID;
2331 #endif
2332                 request->child_state = REQUEST_DONE;
2333                 return;
2334         }
2335
2336 #ifdef WITH_PROXY
2337         /*
2338          *      Copy Proxy-State from the request to the reply.
2339          */
2340         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2341         if (vp) pairadd(&request->reply->vps, vp);
2342 #endif
2343
2344         /*
2345          *      Access-Requests get delayed or cached.
2346          */
2347         switch (request->packet->code) {
2348         case PW_AUTHENTICATION_REQUEST:
2349                 gettimeofday(&request->next_when, NULL);
2350
2351                 if (request->reply->code == 0) {
2352                         /*
2353                          *      Check if the lack of response is intentional.
2354                          */
2355                         vp = pairfind(request->config_items,
2356                                       PW_RESPONSE_PACKET_TYPE);
2357                         if (!vp) {
2358                                 RDEBUG2("There was no response configured: rejecting request %d",
2359                                        request->number);
2360                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2361
2362                         } else if (vp->vp_integer == 256) {
2363                                 RDEBUG2("Not responding to request %d",
2364                                        request->number);
2365
2366                                 /*
2367                                  *      Force cleanup after a long
2368                                  *      time, so that we don't
2369                                  *      re-process the packet.
2370                                  */
2371                                 request->next_when.tv_sec += request->root->max_request_time;
2372                                 request->next_callback = cleanup_delay;
2373                                 child_state = REQUEST_CLEANUP_DELAY;
2374                                 break;
2375                         } else {
2376                                 request->reply->code = vp->vp_integer;
2377
2378                         }
2379                 }
2380
2381                 /*
2382                  *      Run rejected packets through
2383                  *
2384                  *      Post-Auth-Type = Reject
2385                  */
2386                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2387                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2388                         vp = radius_pairmake(request, &request->config_items,
2389                                              "Post-Auth-Type", "Reject",
2390                                              T_OP_SET);
2391                         if (vp) rad_postauth(request);
2392
2393                         /*
2394                          *      If configured, delay Access-Reject packets.
2395                          *
2396                          *      If request->root->reject_delay = 0, we discover
2397                          *      that we have to send the packet now.
2398                          */
2399                         when = request->received;
2400                         when.tv_sec += request->root->reject_delay;
2401
2402                         if (timercmp(&when, &request->next_when, >)) {
2403                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2404                                        request->number,
2405                                        request->root->reject_delay);
2406                                 request->next_when = when;
2407                                 request->next_callback = reject_delay;
2408 #ifdef HAVE_PTHREAD_H
2409                                 request->child_pid = NO_SUCH_CHILD_PID;
2410 #endif
2411                                 request->child_state = REQUEST_REJECT_DELAY;
2412                                 return;
2413                         }
2414                 }
2415
2416 #ifdef WITH_COA
2417         case PW_COA_REQUEST:
2418         case PW_DISCONNECT_REQUEST:
2419 #endif
2420                 request->next_when.tv_sec += request->root->cleanup_delay;
2421                 request->next_callback = cleanup_delay;
2422                 child_state = REQUEST_CLEANUP_DELAY;
2423                 break;
2424
2425         case PW_ACCOUNTING_REQUEST:
2426                 request->next_callback = NULL; /* just to be safe */
2427                 child_state = REQUEST_DONE;
2428                 break;
2429
2430                 /*
2431                  *      FIXME: Status-Server should probably not be
2432                  *      handled here...
2433                  */
2434         case PW_STATUS_SERVER:
2435                 request->next_callback = NULL;
2436                 child_state = REQUEST_DONE;
2437                 break;
2438
2439         default:
2440                 if ((request->packet->code > 1024) &&
2441                     (request->packet->code < (1024 + 254 + 1))) {
2442                         request->next_callback = NULL;
2443                         child_state = REQUEST_DONE;
2444                         break;
2445                 }
2446
2447                 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2448                 request->next_callback = NULL;
2449                 child_state = REQUEST_DONE;
2450                 break;
2451         }
2452
2453         /*
2454          *      Suppress "no reply" packets here, unless we're reading
2455          *      from the "detail" file.  In that case, we've got to
2456          *      tell the detail file handler that the request is dead,
2457          *      and it should re-send it.
2458          *      If configured, encode, sign, and send.
2459          */
2460         if ((request->reply->code != 0) ||
2461             (request->listener->type == RAD_LISTEN_DETAIL)) {
2462                 DEBUG_PACKET(request, request->reply, 1);
2463                 request->listener->send(request->listener, request);
2464         }
2465
2466 #ifdef WITH_COA
2467         /*
2468          *      Now that we've completely processed the request,
2469          *      see if we need to originate a CoA request.
2470          */
2471         if (request->coa ||
2472             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2473                 if (!originated_coa_request(request)) {
2474                         RDEBUG2("Do CoA Fail handler here");
2475                 }
2476                 /* request->coa is stil set, so we can update events */
2477         }
2478 #endif
2479
2480  cleanup:
2481         /*
2482          *      Clean up.  These are no longer needed.
2483          */
2484         pairfree(&request->config_items);
2485
2486         pairfree(&request->packet->vps);
2487         request->username = NULL;
2488         request->password = NULL;
2489
2490         pairfree(&request->reply->vps);
2491
2492 #ifdef WITH_PROXY
2493         if (request->proxy) {
2494                 pairfree(&request->proxy->vps);
2495
2496                 if (request->proxy_reply) {
2497                         pairfree(&request->proxy_reply->vps);
2498                 }
2499
2500 #if 0
2501                 /*
2502                  *      We're not tracking responses from the home
2503                  *      server, we can therefore free this memory in
2504                  *      the child thread.
2505                  */
2506                 if (!request->in_proxy_hash) {
2507                         rad_free(&request->proxy);
2508                         rad_free(&request->proxy_reply);
2509                         request->home_server = NULL;
2510                 }
2511 #endif
2512         }
2513 #endif
2514
2515         RDEBUG2("Finished request %d.", request->number);
2516         rad_assert(child_state >= 0);
2517         request->child_state = child_state;
2518
2519         /*
2520          *      Single threaded mode: update timers now.
2521          */
2522         if (!have_children) wait_a_bit(request);
2523 }
2524
2525
2526 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2527 {
2528 #ifdef WITH_PROXY
2529         char buffer[128];
2530 #endif
2531
2532         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2533         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2534
2535         switch (request->child_state) {
2536         case REQUEST_QUEUED:
2537         case REQUEST_RUNNING:
2538 #ifdef WITH_PROXY
2539         discard:
2540 #endif
2541                 radlog(L_ERR, "Discarding duplicate request from "
2542                        "client %s port %d - ID: %d due to unfinished request %d",
2543                        client->shortname,
2544                        request->packet->src_port,request->packet->id,
2545                        request->number);
2546                 break;
2547
2548 #ifdef WITH_PROXY
2549         case REQUEST_PROXIED:
2550                 /*
2551                  *      We're not supposed to have duplicate
2552                  *      accounting packets.  The other states handle
2553                  *      duplicates fine (discard, or send duplicate
2554                  *      reply).  But we do NOT want to retransmit an
2555                  *      accounting request here, because that would
2556                  *      involve updating the Acct-Delay-Time, and
2557                  *      therefore changing the packet Id, etc.
2558                  *
2559                  *      Instead, we just discard the packet.  We may
2560                  *      eventually respond, or the client will send a
2561                  *      new accounting packet.
2562                  *
2563                  *      The same comments go for Status-Server, and
2564                  *      other packet types.
2565                  *
2566                  *      FIXME: coa: when we proxy CoA && Disconnect
2567                  *      packets, this logic has to be fixed.
2568                  */
2569                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2570                         goto discard;
2571                 }
2572
2573                 check_for_zombie_home_server(request);
2574
2575                 /*
2576                  *      If we've just discovered that the home server is
2577                  *      dead, send the packet to another one.
2578                  */
2579                 if ((request->packet->dst_port != 0) &&
2580                     (request->home_server->state == HOME_STATE_IS_DEAD)) {
2581                         home_server *home;
2582
2583                         remove_from_proxy_hash(request);
2584
2585                         home = home_server_ldb(NULL, request->home_pool, request);
2586                         if (!home) {
2587                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2588                         no_home_servers:
2589                                 /*
2590                                  *      Do post-request processing,
2591                                  *      and any insertion of necessary
2592                                  *      events.
2593                                  */
2594                                 post_proxy_fail_handler(request);
2595                                 return;
2596                         }
2597
2598                         request->proxy->code = request->packet->code;
2599
2600                         /*
2601                          *      Free the old packet, to force re-encoding
2602                          */
2603                         free(request->proxy->data);
2604                         request->proxy->data = NULL;
2605                         request->proxy->data_len = 0;
2606
2607                         /*
2608                          *      This request failed over to a virtual
2609                          *      server.  Push it back onto the queue
2610                          *      to be processed.
2611                          */
2612                         if (request->home_server->server) {
2613                                 proxy_fallback_handler(request);
2614                                 return;
2615                         }
2616
2617                         /*
2618                          *      Try to proxy the request.
2619                          */
2620                         if (!proxy_request(request)) {
2621                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2622                                 goto no_home_servers;
2623                         }
2624
2625                         /*
2626                          *      This code executes in the main server
2627                          *      thread, so there's no need for locking.
2628                          */
2629                         rad_assert(request->next_callback != NULL);
2630                         INSERT_EVENT(request->next_callback, request);
2631                         request->next_callback = NULL;
2632                         return;
2633                 } /* else the home server is still alive */
2634
2635                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2636                        inet_ntop(request->proxy->dst_ipaddr.af,
2637                                  &request->proxy->dst_ipaddr.ipaddr,
2638                                  buffer, sizeof(buffer)),
2639                        request->proxy->dst_port,
2640                        request->proxy->id);
2641                 request->num_proxied_requests++;
2642
2643                 DEBUG_PACKET(request, request->proxy, 1);
2644                 request->proxy_listener->send(request->proxy_listener,
2645                                               request);
2646                 break;
2647 #endif
2648
2649         case REQUEST_REJECT_DELAY:
2650                 RDEBUG2("Waiting to send Access-Reject "
2651                        "to client %s port %d - ID: %d",
2652                        client->shortname,
2653                        request->packet->src_port, request->packet->id);
2654                 break;
2655
2656         case REQUEST_CLEANUP_DELAY:
2657         case REQUEST_DONE:
2658                 if (request->reply->code == 0) {
2659                         RDEBUG2("Ignoring retransmit from client %s port %d "
2660                                 "- ID: %d, no reply was configured",
2661                                 client->shortname,
2662                                 request->packet->src_port, request->packet->id);
2663                         return;
2664                 }
2665
2666                 /*
2667                  *      FIXME: This sends duplicate replies to
2668                  *      accounting requests, even if Acct-Delay-Time
2669                  *      or Event-Timestamp is in the packet.  In those
2670                  *      cases, the Id should be changed, and the packet
2671                  *      re-calculated.
2672                  */
2673                 RDEBUG2("Sending duplicate reply "
2674                        "to client %s port %d - ID: %d",
2675                        client->shortname,
2676                        request->packet->src_port, request->packet->id);
2677                 DEBUG_PACKET(request, request->reply, 1);
2678                 request->listener->send(request->listener, request);
2679                 break;
2680         }
2681 }
2682
2683
2684 static void received_conflicting_request(REQUEST *request,
2685                                          const RADCLIENT *client)
2686 {
2687         radlog(L_ERR, "Received conflicting packet from "
2688                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2689                client->shortname,
2690                request->packet->src_port, request->packet->id,
2691                request->number);
2692
2693         /*
2694          *      Nuke it from the request hash, so we can receive new
2695          *      packets.
2696          */
2697         remove_from_request_hash(request);
2698
2699         switch (request->child_state) {
2700 #ifdef HAVE_PTHREAD_H
2701                 /*
2702                  *      It's queued or running.  Tell it to stop, and
2703                  *      wait for it to do so.
2704                  */
2705         case REQUEST_QUEUED:
2706         case REQUEST_RUNNING:
2707                 request->master_state = REQUEST_STOP_PROCESSING;
2708                 request->delay += request->delay >> 1;
2709
2710                 tv_add(&request->when, request->delay);
2711
2712                 INSERT_EVENT(wait_for_child_to_die, request);
2713                 return;
2714 #endif
2715
2716                 /*
2717                  *      It's in some other state, and therefore also
2718                  *      in the event queue.  At some point, the
2719                  *      child will notice, and we can then delete it.
2720                  */
2721         default:
2722                 rad_assert(request->ev != NULL);
2723                 break;
2724         }
2725 }
2726
2727
2728 static int can_handle_new_request(RADIUS_PACKET *packet,
2729                                   RADCLIENT *client,
2730                                   struct main_config_t *root)
2731 {
2732         /*
2733          *      Count the total number of requests, to see if
2734          *      there are too many.  If so, return with an
2735          *      error.
2736          */
2737         if (root->max_requests) {
2738                 int request_count = fr_packet_list_num_elements(pl);
2739
2740                 /*
2741                  *      This is a new request.  Let's see if
2742                  *      it makes us go over our configured
2743                  *      bounds.
2744                  */
2745                 if (request_count > root->max_requests) {
2746                         radlog(L_ERR, "Dropping request (%d is too many): "
2747                                "from client %s port %d - ID: %d", request_count,
2748                                client->shortname,
2749                                packet->src_port, packet->id);
2750                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2751                                "\tThe value for 'max_requests' is probably set too low.\n");
2752                         return 0;
2753                 } /* else there were a small number of requests */
2754         } /* else there was no configured limit for requests */
2755
2756         /*
2757          *      FIXME: Add per-client checks.  If one client is sending
2758          *      too many packets, start discarding them.
2759          *
2760          *      We increment the counters here, and decrement them
2761          *      when the response is sent... somewhere in this file.
2762          */
2763
2764         /*
2765          *      FUTURE: Add checks for system load.  If the system is
2766          *      busy, start dropping requests...
2767          *
2768          *      We can probably keep some statistics ourselves...  if
2769          *      there are more requests coming in than we can handle,
2770          *      start dropping some.
2771          */
2772
2773         return 1;
2774 }
2775
2776
2777 int received_request(rad_listen_t *listener,
2778                      RADIUS_PACKET *packet, REQUEST **prequest,
2779                      RADCLIENT *client)
2780 {
2781         RADIUS_PACKET **packet_p;
2782         REQUEST *request = NULL;
2783         struct main_config_t *root = &mainconfig;
2784
2785         packet_p = fr_packet_list_find(pl, packet);
2786         if (packet_p) {
2787                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2788                 rad_assert(request->in_request_hash);
2789
2790                 if ((request->packet->data_len == packet->data_len) &&
2791                     (memcmp(request->packet->vector, packet->vector,
2792                             sizeof(packet->vector)) == 0)) {
2793                         received_retransmit(request, client);
2794                         return 0;
2795                 }
2796
2797                 /*
2798                  *      The new request is different from the old one,
2799                  *      but maybe the old is finished.  If so, delete
2800                  *      the old one.
2801                  */
2802                 switch (request->child_state) {
2803                         struct timeval when;
2804
2805                 default:
2806                         /*
2807                          *      Special hacks for race conditions.
2808                          *      The reply is encoded, and therefore
2809                          *      likely sent.  We received a *new*
2810                          *      packet from the client, likely before
2811                          *      the next line or two of code which
2812                          *      updated the child state.  In this
2813                          *      case, just accept the new request.
2814                          */
2815                         if ((request->reply->code != 0) &&
2816                             request->reply->data) {
2817                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2818                                        client->shortname,
2819                                        packet->src_port, packet->id,
2820                                        request->number);
2821                                 remove_from_request_hash(request);
2822                                 request = NULL;
2823                                 break;
2824                         }
2825
2826                         gettimeofday(&when, NULL);
2827                         when.tv_sec -= 1;
2828
2829                         /*
2830                          *      If the cached request was received
2831                          *      within the last second, then we
2832                          *      discard the NEW request instead of the
2833                          *      old one.  This will happen ONLY when
2834                          *      the client is severely broken, and is
2835                          *      sending conflicting packets very
2836                          *      quickly.
2837                          */
2838                         if (timercmp(&when, &request->received, <)) {
2839                                 radlog(L_ERR, "Discarding conflicting packet from "
2840                                        "client %s port %d - ID: %d due to recent request %d.",
2841                                        client->shortname,
2842                                        packet->src_port, packet->id,
2843                                        request->number);
2844                                 return 0;
2845                         }
2846
2847                         received_conflicting_request(request, client);
2848                         request = NULL;
2849                         break;
2850
2851                 case REQUEST_REJECT_DELAY:
2852                 case REQUEST_CLEANUP_DELAY:
2853                         request->child_state = REQUEST_DONE;
2854                 case REQUEST_DONE:
2855                         cleanup_delay(request);
2856                         request = NULL;
2857                         break;
2858                 }
2859         }
2860
2861         /*
2862          *      We may want to quench the new request.
2863          */
2864         if ((listener->type != RAD_LISTEN_DETAIL) &&
2865             !can_handle_new_request(packet, client, root)) {
2866                 return 0;
2867         }
2868
2869         /*
2870          *      Create and initialize the new request.
2871          */
2872         request = request_alloc(); /* never fails */
2873
2874         if ((request->reply = rad_alloc(0)) == NULL) {
2875                 radlog(L_ERR, "No memory");
2876                 exit(1);
2877         }
2878
2879         request->listener = listener;
2880         request->client = client;
2881         request->packet = packet;
2882         request->packet->timestamp = request->timestamp;
2883         request->number = request_num_counter++;
2884         request->priority = listener->type;
2885 #ifdef HAVE_PTHREAD_H
2886         request->child_pid = NO_SUCH_CHILD_PID;
2887 #endif
2888
2889         /*
2890          *      Status-Server packets go to the head of the queue.
2891          */
2892         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2893
2894         /*
2895          *      Set virtual server identity
2896          */
2897         if (client->server) {
2898                 request->server = client->server;
2899         } else if (listener->server) {
2900                 request->server = listener->server;
2901         } else {
2902                 request->server = NULL;
2903         }
2904
2905         /*
2906          *      Remember the request in the list.
2907          */
2908         if (!fr_packet_list_insert(pl, &request->packet)) {
2909                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2910                 ev_request_free(&request);
2911                 return 0;
2912         }
2913
2914         request->in_request_hash = TRUE;
2915         request->root = root;
2916         root->refcount++;
2917
2918         /*
2919          *      The request passes many of our sanity checks.
2920          *      From here on in, if anything goes wrong, we
2921          *      send a reject message, instead of dropping the
2922          *      packet.
2923          */
2924
2925         /*
2926          *      Build the reply template from the request.
2927          */
2928
2929         request->reply->sockfd = request->packet->sockfd;
2930         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2931         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2932         request->reply->dst_port = request->packet->src_port;
2933         request->reply->src_port = request->packet->dst_port;
2934         request->reply->id = request->packet->id;
2935         request->reply->code = 0; /* UNKNOWN code */
2936         memcpy(request->reply->vector, request->packet->vector,
2937                sizeof(request->reply->vector));
2938         request->reply->vps = NULL;
2939         request->reply->data = NULL;
2940         request->reply->data_len = 0;
2941
2942         request->master_state = REQUEST_ACTIVE;
2943         request->child_state = REQUEST_QUEUED;
2944         request->next_callback = NULL;
2945
2946         gettimeofday(&request->received, NULL);
2947         request->timestamp = request->received.tv_sec;
2948         request->when = request->received;
2949
2950         request->delay = USEC;
2951
2952         tv_add(&request->when, request->delay);
2953
2954         INSERT_EVENT(wait_a_bit, request);
2955
2956         *prequest = request;
2957         return 1;
2958 }
2959
2960
2961 #ifdef WITH_PROXY
2962 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2963 {
2964         char            buffer[128];
2965         REQUEST         *request;
2966
2967         /*
2968          *      Also removes from the proxy hash if responses == requests
2969          */
2970         request = lookup_in_proxy_hash(packet);
2971
2972         if (!request) {
2973                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2974                        inet_ntop(packet->src_ipaddr.af,
2975                                  &packet->src_ipaddr.ipaddr,
2976                                  buffer, sizeof(buffer)),
2977                        packet->src_port, packet->id);
2978                 return NULL;
2979         }
2980
2981         /*
2982          *      We haven't replied to the NAS, but we have seen an
2983          *      earlier reply from the home server.  Ignore this packet,
2984          *      as we're likely still processing the previous reply.
2985          */
2986         if (request->proxy_reply) {
2987                 if (memcmp(request->proxy_reply->vector,
2988                            packet->vector,
2989                            sizeof(request->proxy_reply->vector)) == 0) {
2990                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
2991                                inet_ntop(packet->src_ipaddr.af,
2992                                          &packet->src_ipaddr.ipaddr,
2993                                          buffer, sizeof(buffer)),
2994                                packet->src_port, packet->id,
2995                                request->number);
2996                 } else {
2997                         /*
2998                          *      ? The home server gave us a new proxy
2999                          *      reply which doesn't match the old
3000                          *      one.  Delete it.
3001                          */
3002                         RDEBUG2("Ignoring conflicting proxy reply");
3003                 }
3004
3005                 /* assert that there's an event queued for request? */
3006                 return NULL;
3007         }
3008
3009         /*
3010          *      Verify the packet before doing ANYTHING with it.  This
3011          *      means we're doing more MD5 checks in the server core.
3012          *      However, we can fix that by moving to multiple threads
3013          *      listening on sockets.
3014          *
3015          *      We do this AFTER looking the request up in the hash,
3016          *      and AFTER vhecking if we saw a previous request.  This
3017          *      helps minimize the DoS effect of people attacking us
3018          *      with spoofed packets.
3019          */
3020         if (rad_verify(packet, request->proxy,
3021                        request->home_server->secret) != 0) {
3022                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3023                 return NULL;
3024         }
3025
3026         gettimeofday(&now, NULL);
3027
3028         /*
3029          *      Maybe move this earlier in the decision process?
3030          *      Having it here means that late or duplicate proxy
3031          *      replies no longer get the home server marked as
3032          *      "alive".  This might be good for stability, though.
3033          *
3034          *      FIXME: Do we really want to do this whenever we
3035          *      receive a packet?  Setting this here means that we
3036          *      mark it alive on *any* packet, even if it's lost all
3037          *      of the *other* packets in the last 10s.
3038          */
3039         request->home_server->state = HOME_STATE_ALIVE;
3040
3041 #ifdef WITH_COA
3042         /*
3043          *      When originating CoA, the "proxy" reply is the reply
3044          *      to the CoA request that we originated.  At this point,
3045          *      the original request is finished, and it has a reply.
3046          *
3047          *      However, if we haven't separated the two requests, do
3048          *      so now.  This is done so that cleaning up the original
3049          *      request won't cause the CoA request to be free'd.  See
3050          *      util.c, request_free()
3051          */
3052         if (request->parent && (request->parent->coa == request)) {
3053                 request->parent->coa = NULL;
3054                 request->parent = NULL;
3055
3056         } else
3057                 /*
3058                  *      Skip the next set of checks, as the original
3059                  *      reply is cached.  We want to be able to still
3060                  *      process the CoA reply, AND to reference the
3061                  *      original request/reply.
3062                  *
3063                  *      This is getting to be really quite a bit of a
3064                  *      hack.
3065                  */
3066 #endif
3067
3068         /*
3069          *      If there's a reply to the NAS, ignore everything
3070          *      related to proxy responses
3071          */
3072         if (request->reply && request->reply->code != 0) {
3073                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3074                 return NULL;
3075         }
3076
3077 #ifdef WITH_STATS
3078         /*
3079          *      The average includes our time to receive packets and
3080          *      look them up in the hashes, which should be the same
3081          *      for all packets.
3082          *
3083          *      We update the response time only for the FIRST packet
3084          *      we receive.
3085          */
3086         if (request->home_server->ema.window > 0) {
3087                 radius_stats_ema(&request->home_server->ema,
3088                                  &now, &request->proxy_when);
3089         }
3090 #endif
3091
3092         switch (request->child_state) {
3093         case REQUEST_QUEUED:
3094         case REQUEST_RUNNING:
3095                 radlog(L_ERR, "Internal sanity check failed for child state");
3096                 /* FALL-THROUGH */
3097
3098         case REQUEST_REJECT_DELAY:
3099         case REQUEST_CLEANUP_DELAY:
3100         case REQUEST_DONE:
3101                 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'",
3102                        inet_ntop(packet->src_ipaddr.af,
3103                                  &packet->src_ipaddr.ipaddr,
3104                                  buffer, sizeof(buffer)),
3105                        packet->src_port, packet->id,
3106                        request->number);
3107                 /* assert that there's an event queued for request? */
3108                 return NULL;
3109
3110         case REQUEST_PROXIED:
3111                 break;
3112         }
3113
3114         request->proxy_reply = packet;
3115
3116 #if 0
3117         /*
3118          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3119          *      Note that we only do so on the first response.
3120          */
3121         if ((request->num_proxied_responses == 1)
3122                 int rtt;
3123                 home_server *home = request->home_server;
3124
3125                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3126                 rtt *= USEC;
3127                 rtt += now.tv_usec;
3128                 rtt -= request->proxy_when.tv_usec;
3129
3130                 if (!home->has_rtt) {
3131                         home->has_rtt = TRUE;
3132
3133                         home->srtt = rtt;
3134                         home->rttvar = rtt / 2;
3135
3136                 } else {
3137                         home->rttvar -= home->rttvar >> 2;
3138                         home->rttvar += (home->srtt - rtt);
3139                         home->srtt -= home->srtt >> 3;
3140                         home->srtt += rtt >> 3;
3141                 }
3142
3143                 home->rto = home->srtt;
3144                 if (home->rttvar > (USEC / 4)) {
3145                         home->rto += home->rttvar * 4;
3146                 } else {
3147                         home->rto += USEC;
3148                 }
3149         }
3150 #endif
3151
3152         /*
3153          *      There's no incoming request, so it's a proxied packet
3154          *      we originated.
3155          */
3156         if (!request->packet) {
3157                 received_response_to_ping(request);
3158                 request->proxy_reply = NULL; /* caller will free it */
3159                 ev_request_free(&request);
3160                 return NULL;
3161         }
3162
3163         request->child_state = REQUEST_QUEUED;
3164         request->when = now;
3165         request->delay = USEC;
3166         request->priority = RAD_LISTEN_PROXY;
3167         tv_add(&request->when, request->delay);
3168
3169         /*
3170          *      Wait a bit will take care of max_request_time
3171          */
3172         INSERT_EVENT(wait_a_bit, request);
3173
3174         return request;
3175 }
3176 #endif
3177
3178 void event_new_fd(rad_listen_t *this)
3179 {
3180         char buffer[1024];
3181
3182         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3183
3184         this->print(this, buffer, sizeof(buffer));
3185
3186         if (this->status == RAD_LISTEN_STATUS_INIT) {
3187                 if (just_started) {
3188                         DEBUG("Listening on %s", buffer);
3189                 } else {
3190                         DEBUG2(" ... adding new socket %s", buffer);
3191                 }
3192                 if (!fr_event_fd_insert(el, 0, this->fd,
3193                                         event_socket_handler, this)) {
3194                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3195                         exit(1);
3196                 }
3197
3198                 this->status = RAD_LISTEN_STATUS_KNOWN;
3199                 return;
3200         }
3201
3202         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3203                 DEBUG2(" ... closing socket %s", buffer);
3204
3205                 fr_event_fd_delete(el, 0, this->fd);
3206                 this->status = RAD_LISTEN_STATUS_FINISH;
3207
3208                 /*
3209                  *      Close the fd AFTER fixing up the requests and
3210                  *      listeners, so that they don't send/recv on the
3211                  *      wrong socket (if someone manages to open
3212                  *      another one).
3213                  */
3214                 close(this->fd);
3215                 this->fd = -1;
3216         }
3217 }
3218
3219 static void handle_signal_self(int flag)
3220 {
3221         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3222                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3223                         fr_event_loop_exit(el, 1);
3224                 } else {
3225                         fr_event_loop_exit(el, 2);
3226                 }
3227
3228                 return;
3229         } /* else exit/term flags weren't set */
3230
3231         /*
3232          *      Tell the even loop to stop processing.
3233          */
3234         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3235                 time_t when;
3236                 static time_t last_hup = 0;
3237
3238                 DEBUG("Received HUP signal.");
3239
3240                 when = time(NULL);
3241                 if ((int) (when - last_hup) < 5) {
3242                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3243                         return;
3244                 }
3245                 last_hup = when;
3246
3247                 fr_event_loop_exit(el, 0x80);
3248         }
3249
3250 #ifdef WITH_DETAIL
3251         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3252                 rad_listen_t *this;
3253
3254                 /*
3255                  *      FIXME: O(N) loops suck.
3256                  */
3257                 for (this = mainconfig.listen;
3258                      this != NULL;
3259                      this = this->next) {
3260                         if (this->type != RAD_LISTEN_DETAIL) continue;
3261
3262                         /*
3263                          *      This one didn't send the signal, skip
3264                          *      it.
3265                          */
3266                         if (!this->decode(this, NULL)) continue;
3267
3268                         /*
3269                          *      Go service the interrupt.
3270                          */
3271                         event_poll_detail(this);
3272                 }
3273         }
3274 #endif
3275
3276         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3277                 rad_listen_t *this;
3278
3279                 for (this = mainconfig.listen;
3280                      this != NULL;
3281                      this = this->next) {
3282                         event_new_fd(this);
3283                 }
3284         }
3285 }
3286
3287 #ifndef WITH_SELF_PIPE
3288 void radius_signal_self(int flag)
3289 {
3290         handle_signal_self(flag);
3291 }
3292 #else
3293 /*
3294  *      Inform ourselves that we received a signal.
3295  */
3296 void radius_signal_self(int flag)
3297 {
3298         ssize_t rcode;
3299         uint8_t buffer[16];
3300
3301         /*
3302          *      The read MUST be non-blocking for this to work.
3303          */
3304         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3305         if (rcode > 0) {
3306                 ssize_t i;
3307
3308                 for (i = 0; i < rcode; i++) {
3309                         buffer[0] |= buffer[i];
3310                 }
3311         } else {
3312                 buffer[0] = 0;
3313         }
3314
3315         buffer[0] |= flag;
3316
3317         write(self_pipe[1], buffer, 1);
3318 }
3319
3320
3321 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3322                                  UNUSED int fd, UNUSED void *ctx)
3323 {
3324         ssize_t i, rcode;
3325         uint8_t buffer[32];
3326
3327         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3328         if (rcode <= 0) return;
3329
3330         /*
3331          *      Merge pending signals.
3332          */
3333         for (i = 0; i < rcode; i++) {
3334                 buffer[0] |= buffer[i];
3335         }
3336
3337         handle_signal_self(buffer[0]);
3338 }
3339 #endif
3340
3341
3342 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3343                                  void *ctx)
3344 {
3345         rad_listen_t *listener = ctx;
3346         RAD_REQUEST_FUNP fun;
3347         REQUEST *request;
3348
3349         rad_assert(xel == el);
3350
3351         xel = xel;
3352
3353         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3354
3355         if (!listener->recv(listener, &fun, &request)) return;
3356
3357         if (!thread_pool_addrequest(request, fun)) {
3358                 request->child_state = REQUEST_DONE;
3359         }
3360 }
3361
3362 typedef struct listen_detail_t {
3363         fr_event_t      *ev;
3364 } listen_detail_t;
3365
3366 /*
3367  *      This function is called periodically to see if this detail
3368  *      file is available for reading.
3369  */
3370 static void event_poll_detail(void *ctx)
3371 {
3372         int rcode, delay;
3373         RAD_REQUEST_FUNP fun;
3374         REQUEST *request;
3375         rad_listen_t *this = ctx;
3376         struct timeval when;
3377         listen_detail_t *detail = this->data;
3378
3379         rad_assert(this->type == RAD_LISTEN_DETAIL);
3380
3381         /*
3382          *      Try to read something.
3383          *
3384          *      FIXME: This does poll AND receive.
3385          */
3386         rcode = this->recv(this, &fun, &request);
3387         if (rcode != 0) {
3388                 rad_assert(fun != NULL);
3389                 rad_assert(request != NULL);
3390
3391                 if (!thread_pool_addrequest(request, fun)) {
3392                         request->child_state = REQUEST_DONE;
3393                 }
3394         }
3395
3396         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3397         when = now;
3398
3399         /*
3400          *      Backdoor API to get the delay until the next poll
3401          *      time.
3402          */
3403         delay = this->encode(this, NULL);
3404         tv_add(&when, delay);
3405
3406         if (!fr_event_insert(el, event_poll_detail, this,
3407                              &when, &detail->ev)) {
3408                 radlog(L_ERR, "Failed creating handler");
3409                 exit(1);
3410         }
3411 }
3412
3413
3414 static void event_status(struct timeval *wake)
3415 {
3416 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3417         int argval;
3418 #endif
3419
3420         if (debug_flag == 0) {
3421                 if (just_started) {
3422                         radlog(L_INFO, "Ready to process requests.");
3423                         just_started = FALSE;
3424                 }
3425                 return;
3426         }
3427
3428         if (!wake) {
3429                 DEBUG("Ready to process requests.");
3430
3431         } else if ((wake->tv_sec != 0) ||
3432                    (wake->tv_usec >= 100000)) {
3433                 DEBUG("Waking up in %d.%01u seconds.",
3434                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3435         }
3436
3437
3438         /*
3439          *      FIXME: Put this somewhere else, where it isn't called
3440          *      all of the time...
3441          */
3442
3443 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3444         /*
3445          *      If there are no child threads, then there may
3446          *      be child processes.  In that case, wait for
3447          *      their exit status, and throw that exit status
3448          *      away.  This helps get rid of zxombie children.
3449          */
3450         while (waitpid(-1, &argval, WNOHANG) > 0) {
3451                 /* do nothing */
3452         }
3453 #endif
3454
3455 }
3456
3457 /*
3458  *      Externally-visibly functions.
3459  */
3460 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3461 {
3462         rad_listen_t *this, *head = NULL;
3463
3464         if (el) return 0;
3465
3466         time(&fr_start_time);
3467
3468         el = fr_event_list_create(event_status);
3469         if (!el) return 0;
3470
3471         pl = fr_packet_list_create(0);
3472         if (!pl) return 0;      /* leak el */
3473
3474         request_num_counter = 0;
3475
3476 #ifdef WITH_PROXY
3477         if (mainconfig.proxy_requests) {
3478                 pthread_mutexattr_t attr;
3479
3480                 /*
3481                  *      Create the tree for managing proxied requests and
3482                  *      responses.
3483                  */
3484                 proxy_list = fr_packet_list_create(1);
3485                 if (!proxy_list) return 0;
3486
3487 #ifdef HAVE_PTHREAD_H
3488                 pthread_mutexattr_init(&attr);
3489
3490 #ifdef PTHREAD_MUTEX_RECURSIVE
3491                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3492                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3493                                strerror(errno));
3494                         exit(1);
3495                 }
3496 #endif
3497
3498                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3499                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3500                                strerror(errno));
3501                         exit(1);
3502                 }
3503
3504                 pthread_mutexattr_destroy(&attr);
3505 #endif
3506         }
3507 #endif
3508
3509         /*
3510          *      Just before we spawn the child threads, force the log
3511          *      subsystem to re-open the log file for every write.
3512          */
3513         if (spawn_flag) force_log_reopen();
3514
3515 #ifdef HAVE_PTHREAD_H
3516 #ifndef __MINGW32__
3517         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3518 #else
3519         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3520 #endif
3521         /*
3522          *      Initialize the threads ONLY if we're spawning, AND
3523          *      we're running normally.
3524          */
3525         if (spawn_flag && !check_config &&
3526             (thread_pool_init(cs, &spawn_flag) < 0)) {
3527                 exit(1);
3528         }
3529 #endif
3530
3531         /*
3532          *      Move all of the thread calls to this file?
3533          *
3534          *      It may be best for the mutexes to be in this file...
3535          */
3536         have_children = spawn_flag;
3537
3538         if (check_config) {
3539                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3540                        mainconfig.name);
3541                 return 1;
3542         }
3543
3544 #ifdef WITH_SELF_PIPE
3545         /*
3546          *      Child threads need a pipe to signal us, as do the
3547          *      signal handlers.
3548          */
3549         if (pipe(self_pipe) < 0) {
3550                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3551                        strerror(errno));
3552                 exit(1);
3553         }
3554         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3555                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3556                        strerror(errno));
3557                 exit(1);
3558         }
3559         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3560                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3561                        strerror(errno));
3562                 exit(1);
3563         }
3564
3565         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3566                                   event_signal_handler, el)) {
3567                 radlog(L_ERR, "Failed creating handler for signals");
3568                 exit(1);
3569         }
3570 #endif  /* WITH_SELF_PIPE */
3571
3572 #ifdef WITH_PROXY
3573         /*
3574          *      Mark the proxy Fd's as unused.
3575          */
3576         {
3577                 int i;
3578
3579                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3580         }
3581 #endif
3582
3583        DEBUG("%s: #### Opening IP addresses and Ports ####",
3584                mainconfig.name);
3585
3586        /*
3587         *       The server temporarily switches to an unprivileged
3588         *       user very early in the bootstrapping process.
3589         *       However, some sockets MAY require privileged access
3590         *       (bind to device, or to port < 1024, or to raw
3591         *       sockets).  Those sockets need to call suid up/down
3592         *       themselves around the functions that need a privileged
3593         *       uid.
3594         */
3595         if (listen_init(cs, &head) < 0) {
3596                 _exit(1);
3597         }
3598
3599         /*
3600          *      At this point, no one has any business *ever* going
3601          *      back to root uid.
3602          */
3603         fr_suid_down_permanent();
3604
3605         /*
3606          *      Add all of the sockets to the event loop.
3607          */
3608         for (this = head;
3609              this != NULL;
3610              this = this->next) {
3611                 char buffer[256];
3612
3613                 this->print(this, buffer, sizeof(buffer));
3614
3615                 switch (this->type) {
3616 #ifdef WITH_DETAIL
3617                 case RAD_LISTEN_DETAIL:
3618                         DEBUG("Listening on %s", buffer);
3619
3620                         /*
3621                          *      Detail files are always known, and aren't
3622                          *      put into the socket event loop.
3623                          */
3624                         this->status = RAD_LISTEN_STATUS_KNOWN;
3625
3626                         /*
3627                          *      Set up the first poll interval.
3628                          */
3629                         event_poll_detail(this);
3630                         break;
3631 #endif
3632
3633 #ifdef WITH_PROXY
3634                 case RAD_LISTEN_PROXY:
3635                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3636                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3637
3638                         proxy_fds[this->fd & 0x1f] = this->fd;
3639                         proxy_listeners[this->fd & 0x1f] = this;
3640                         if (!fr_packet_list_socket_add(proxy_list,
3641                                                          this->fd)) {
3642                                 rad_assert(0 == 1);
3643                         }
3644                         /* FALL-THROUGH */
3645 #endif
3646
3647                 default:
3648                         break;
3649                 }
3650
3651                 event_new_fd(this);
3652         }
3653
3654         mainconfig.listen = head;
3655
3656         return 1;
3657 }
3658
3659
3660 static int request_hash_cb(UNUSED void *ctx, void *data)
3661 {
3662         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3663
3664 #ifdef WITH_PROXY
3665         rad_assert(request->in_proxy_hash == FALSE);
3666 #endif
3667
3668         ev_request_free(&request);
3669
3670         return 0;
3671 }
3672
3673
3674 #ifdef WITH_PROXY
3675 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3676 {
3677         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3678
3679         ev_request_free(&request);
3680
3681         return 0;
3682 }
3683 #endif
3684
3685 void radius_event_free(void)
3686 {
3687         /*
3688          *      FIXME: Stop all threads, or at least check that
3689          *      they're all waiting on the semaphore, and the queues
3690          *      are empty.
3691          */
3692
3693 #ifdef WITH_PROXY
3694         /*
3695          *      There are requests in the proxy hash that aren't
3696          *      referenced from anywhere else.  Remove them first.
3697          */
3698         if (proxy_list) {
3699                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3700                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3701                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3702                 fr_packet_list_free(proxy_list);
3703                 proxy_list = NULL;
3704         }
3705 #endif
3706
3707         fr_packet_list_walk(pl, NULL, request_hash_cb);
3708
3709         fr_packet_list_free(pl);
3710         pl = NULL;
3711
3712         fr_event_list_free(el);
3713 }
3714
3715 int radius_event_process(void)
3716 {
3717         if (!el) return 0;
3718
3719         return fr_event_loop(el);
3720 }
3721
3722 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3723 {
3724         request->options = RAD_REQUEST_OPTION_DEBUG2;
3725
3726         if (request_pre_handler(request)) {
3727                 rad_assert(fun != NULL);
3728                 rad_assert(request != NULL);
3729
3730                 if (request->server) RDEBUG("server %s {",
3731                                             request->server != NULL ?
3732                                             request->server : "");
3733                 fun(request);
3734
3735                 if (request->server) RDEBUG("} # server %s",
3736                                              request->server != NULL ?
3737                                             request->server : "");
3738
3739                 request_post_handler(request);
3740         }
3741
3742         DEBUG2("Going to the next request");
3743         return;
3744 }