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 #ifdef WITH_TCP
 148         request->listener->count--;
 149
 150         /*
 151          *      The TCP socket was closed, but we've got to
 152          *      hang around until done.
 153          */
 154         if ((request->listener->status == RAD_LISTEN_STATUS_FINISH) &&
 155             (request->listener->count == 0)) {
 156                 listen_free(&request->listener);
 157         }
 158 #endif
 159 }
 160
 161
 162 #ifdef WITH_PROXY
 163 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
 164 {
 165         RADIUS_PACKET **proxy_p;
 166         REQUEST *request;
 167
 168         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 169         proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
 170
 171         if (!proxy_p) {
 172                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 173                 return NULL;
 174         }
 175
 176         request = fr_packet2myptr(REQUEST, proxy, proxy_p);
 177
 178         if (!request) {
 179                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 180                 return NULL;
 181         }
 182
 183         request->num_proxied_responses++;
 184
 185         /*
 186          *      Catch the most common case of everything working
 187          *      correctly.
 188          */
 189         if (request->num_proxied_requests == request->num_proxied_responses) {
 190                 fr_packet_list_yank(proxy_list, request->proxy);
 191                 fr_packet_list_id_free(proxy_list, request->proxy);
 192                 request->in_proxy_hash = FALSE;
 193         }
 194
 195         /*
 196          *      On the FIRST reply, decrement the count of outstanding
 197          *      requests.  Note that this is NOT the count of sent
 198          *      packets, but whether or not the home server has
 199          *      responded at all.
 200          */
 201         if (!request->proxy_reply &&
 202             request->home_server &&
 203             request->home_server->currently_outstanding) {
 204                 request->home_server->currently_outstanding--;
 205         }
 206
 207         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 208
 209         return request;
 210 }
 211
 212
 213 static void remove_from_proxy_hash(REQUEST *request)
 214 {
 215         /*
 216          *      Check this without grabbing the mutex because it's a
 217          *      lot faster that way.
 218          */
 219         if (!request->in_proxy_hash) return;
 220
 221         /*
 222          *      The "not in hash" flag is definitive.  However, if the
 223          *      flag says that it IS in the hash, there might still be
 224          *      a race condition where it isn't.
 225          */
 226         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 227
 228         if (!request->in_proxy_hash) {
 229                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 230                 return;
 231         }
 232
 233         fr_packet_list_yank(proxy_list, request->proxy);
 234         fr_packet_list_id_free(proxy_list, request->proxy);
 235
 236         /*
 237          *      The home server hasn't replied, but we've given up on
 238          *      this request.  Don't count this request against the
 239          *      home server.
 240          */
 241         if (!request->proxy_reply &&
 242             request->home_server &&
 243             request->home_server->currently_outstanding) {
 244                 request->home_server->currently_outstanding--;
 245         }
 246
 247         /*
 248          *      Got from YES in hash, to NO, not in hash while we hold
 249          *      the mutex.  This guarantees that when another thread
 250          *      grans the mutex, the "not in hash" flag is correct.
 251          */
 252         request->in_proxy_hash = FALSE;
 253
 254         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 255 }
 256 #endif  /* WITH_PROXY */
 257
 258 static void ev_request_free(REQUEST **prequest)
 259 {
 260         REQUEST *request;
 261
 262         if (!prequest || !*prequest) return;
 263
 264         request = *prequest;
 265
 266 #ifdef WITH_COA
 267         if (request->coa) {
 268                 /*
 269                  *      Divorce the child from the parent first,
 270                  *      then clean up the child.
 271                  */
 272                 request->coa->parent = NULL;
 273                 ev_request_free(&request->coa);
 274         }
 275
 276         /*
 277          *      Divorce the parent from the child, and leave the
 278          *      parent still alive.
 279          */
 280         if (request->parent && (request->parent->coa == request)) {
 281                 request->parent->coa = NULL;
 282         }
 283 #endif
 284
 285         if (request->ev) fr_event_delete(el, &request->ev);
 286 #ifdef WITH_PROXY
 287         if (request->in_proxy_hash) remove_from_proxy_hash(request);
 288 #endif
 289         if (request->in_request_hash) remove_from_request_hash(request);
 290
 291         request_free(prequest);
 292 }
 293
 294 #ifdef WITH_PROXY
 295 static int proxy_id_alloc(REQUEST *request, RADIUS_PACKET *packet)
 296 {
 297         int i, proxy, found;
 298         rad_listen_t *proxy_listener;
 299
 300         if (fr_packet_list_id_alloc(proxy_list, packet)) return 1;
 301
 302         /*
 303          *      Allocate a new proxy fd.  This function adds
 304          *      it to the tail of the list of listeners.  With
 305          *      some care, this can be thread-safe.
 306          */
 307         proxy_listener = proxy_new_listener(&packet->src_ipaddr, FALSE);
 308         if (!proxy_listener) {
 309                 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 310                 return 0;
 311         }
 312
 313         /*
 314          *      Cache it locally.
 315          */
 316         found = -1;
 317         proxy = proxy_listener->fd;
 318         for (i = 0; i < 32; i++) {
 319                 /*
 320                  *      Found a free entry.  Save the socket,
 321                  *      and remember where we saved it.
 322                  */
 323                 if (proxy_fds[(proxy + i) & 0x1f] == -1) {
 324                         found = (proxy + i) & 0x1f;
 325                         proxy_fds[found] = proxy;
 326                         proxy_listeners[found] = proxy_listener;
 327                         break;
 328                 }
 329         }
 330         rad_assert(found >= 0);
 331
 332         if (!fr_packet_list_socket_add(proxy_list, proxy_listener->fd)) {
 333                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 334                 return 0;
 335
 336         }
 337
 338         if (!fr_packet_list_id_alloc(proxy_list, packet)) {
 339                         RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
 340                 return 0;
 341         }
 342
 343         /*
 344          *      Signal the main thread to add the new FD to the list
 345          *      of listening FD's.
 346          */
 347         radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
 348         return 1;
 349 }
 350
 351
 352 static int insert_into_proxy_hash(REQUEST *request, int retransmit)
 353 {
 354         int i, proxy;
 355         char buf[128];
 356
 357         rad_assert(request->proxy != NULL);
 358         rad_assert(proxy_list != NULL);
 359
 360         PTHREAD_MUTEX_LOCK(&proxy_mutex);
 361
 362         /*
 363          *      Keep track of maximum outstanding requests to a
 364          *      particular home server.  'max_outstanding' is
 365          *      enforced in home_server_ldb(), in realms.c.
 366          */
 367         if (request->home_server) {
 368                 request->home_server->currently_outstanding++;
 369         }
 370
 371         if (retransmit) {
 372                 RADIUS_PACKET packet;
 373
 374                 packet = *request->proxy;
 375
 376                 if (!proxy_id_alloc(request, &packet)) {
 377                         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 378                         return 0;
 379                 }
 380
 381                 /*
 382                  *      Yank the request, free the old Id, and
 383                  *      remember the new Id.
 384                  */
 385                 fr_packet_list_yank(proxy_list, request->proxy);
 386                 fr_packet_list_id_free(proxy_list, request->proxy);
 387                 *request->proxy = packet;
 388
 389         } else if (!proxy_id_alloc(request, request->proxy)) {
 390                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 391                 return 0;
 392         }
 393
 394         rad_assert(request->proxy->sockfd >= 0);
 395
 396         /*
 397          *      FIXME: Hack until we get rid of rad_listen_t, and put
 398          *      the information into the packet_list.
 399          */
 400         proxy = -1;
 401         for (i = 0; i < 32; i++) {
 402                 if (proxy_fds[i] == request->proxy->sockfd) {
 403                         proxy = i;
 404                         break;
 405                 }
 406         }
 407
 408         if (proxy < 0) {
 409                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 410                 RDEBUG2("ERROR: All sockets are full.");
 411                 return 0;
 412         }
 413
 414         rad_assert(proxy_fds[proxy] != -1);
 415         rad_assert(proxy_listeners[proxy] != NULL);
 416         request->proxy_listener = proxy_listeners[proxy];
 417
 418         if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
 419                 fr_packet_list_id_free(proxy_list, request->proxy);
 420                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 421                 RDEBUG2("ERROR: Failed to insert entry into proxy list");
 422                 return 0;
 423         }
 424
 425         request->in_proxy_hash = TRUE;
 426
 427         PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
 428
 429         RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
 430                inet_ntop(request->proxy->dst_ipaddr.af,
 431                          &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
 432                request->proxy->dst_port,
 433                request->proxy->id);
 434
 435         return 1;
 436 }
 437
 438
 439 /*
 440  *      Called as BOTH an event, and in-line from other functions.
 441  */
 442 static void wait_for_proxy_id_to_expire(void *ctx)
 443 {
 444         REQUEST *request = ctx;
 445
 446         rad_assert(request->magic == REQUEST_MAGIC);
 447         rad_assert(request->proxy != NULL);
 448
 449         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
 450         request->when = request->proxy_when;
 451
 452 #ifdef WITH_COA
 453         if (((request->proxy->code == PW_COA_REQUEST) ||
 454              (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
 455             (request->packet->code != request->proxy->code)) {
 456                 request->when.tv_sec += request->home_server->coa_mrd;
 457         } else
 458 #endif
 459         request->when.tv_sec += request->home_server->response_window;
 460
 461         if ((request->num_proxied_requests == request->num_proxied_responses) ||
 462             timercmp(&now, &request->when, >)) {
 463                 if (request->packet) {
 464                         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 465                                request->number, request->packet->id,
 466                                (unsigned int) (request->timestamp - fr_start_time));
 467                 } else {
 468                         RDEBUG2("Cleaning up request %d with timestamp +%d",
 469                                request->number,
 470                                (unsigned int) (request->timestamp - fr_start_time));
 471                 }
 472
 473                 ev_request_free(&request);
 474                 return;
 475         }
 476
 477         INSERT_EVENT(wait_for_proxy_id_to_expire, request);
 478 }
 479 #endif
 480
 481 #ifdef HAVE_PTHREAD_H
 482 static void wait_for_child_to_die(void *ctx)
 483 {
 484         REQUEST *request = ctx;
 485
 486         rad_assert(request->magic == REQUEST_MAGIC);
 487
 488         if ((request->child_state == REQUEST_QUEUED) |
 489             (request->child_state == REQUEST_RUNNING)) {
 490                 request->delay += (request->delay >> 1);
 491                 tv_add(&request->when, request->delay);
 492
 493                 RDEBUG2("Child is still stuck for request %d", request->number);
 494
 495                 INSERT_EVENT(wait_for_child_to_die, request);
 496                 return;
 497         }
 498
 499         RDEBUG2("Child is finally responsive for request %d", request->number);
 500         remove_from_request_hash(request);
 501
 502 #ifdef WITH_PROXY
 503         if (request->proxy) {
 504                 wait_for_proxy_id_to_expire(request);
 505                 return;
 506         }
 507 #endif
 508
 509         ev_request_free(&request);
 510 }
 511 #endif
 512
 513 static void cleanup_delay(void *ctx)
 514 {
 515         REQUEST *request = ctx;
 516
 517         rad_assert(request->magic == REQUEST_MAGIC);
 518         rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
 519                    (request->child_state == REQUEST_DONE));
 520
 521         remove_from_request_hash(request);
 522
 523 #ifdef WITH_PROXY
 524         if (request->proxy && request->in_proxy_hash) {
 525                 wait_for_proxy_id_to_expire(request);
 526                 return;
 527         }
 528 #endif
 529
 530         RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
 531                request->number, request->packet->id,
 532                (unsigned int) (request->timestamp - fr_start_time));
 533
 534         ev_request_free(&request);
 535 }
 536
 537
 538 /*
 539  *      In daemon mode, AND this request has debug flags set.
 540  */
 541 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
 542
 543 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
 544 {
 545         VALUE_PAIR *vp;
 546         char buffer[1024];
 547         const char *received, *from;
 548         const fr_ipaddr_t *ip;
 549         int port;
 550
 551         if (!packet) return;
 552
 553         rad_assert(request->radlog != NULL);
 554
 555         if (direction == 0) {
 556                 received = "Received";
 557                 from = "from";  /* what else? */
 558                 ip = &packet->src_ipaddr;
 559                 port = packet->src_port;
 560
 561         } else {
 562                 received = "Sending";
 563                 from = "to";    /* hah! */
 564                 ip = &packet->dst_ipaddr;
 565                 port = packet->dst_port;
 566         }
 567
 568         /*
 569          *      Client-specific debugging re-prints the input
 570          *      packet into the client log.
 571          *
 572          *      This really belongs in a utility library
 573          */
 574         if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
 575                 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
 576                        received, fr_packet_codes[packet->code], from,
 577                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 578                        port, packet->id, packet->data_len);
 579         } else {
 580                 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
 581                        received, from,
 582                        inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
 583                        port,
 584                        packet->code, packet->id, packet->data_len);
 585         }
 586
 587         for (vp = packet->vps; vp != NULL; vp = vp->next) {
 588                 vp_prints(buffer, sizeof(buffer), vp);
 589                 request->radlog(L_DBG, 0, request, "\t%s", buffer);
 590         }
 591 }
 592
 593 static void reject_delay(void *ctx)
 594 {
 595         REQUEST *request = ctx;
 596
 597         rad_assert(request->magic == REQUEST_MAGIC);
 598         rad_assert(request->child_state == REQUEST_REJECT_DELAY);
 599
 600         RDEBUG2("Sending delayed reject for request %d", request->number);
 601
 602         DEBUG_PACKET(request, request->reply, 1);
 603
 604         request->listener->send(request->listener, request);
 605
 606         request->when.tv_sec += request->root->cleanup_delay;
 607         request->child_state = REQUEST_CLEANUP_DELAY;
 608
 609         INSERT_EVENT(cleanup_delay, request);
 610 }
 611
 612
 613 #ifdef WITH_PROXY
 614 void revive_home_server(void *ctx)
 615 {
 616         home_server *home = ctx;
 617         char buffer[128];
 618
 619 #ifdef WITH_TCP
 620         rad_assert(home->proto != IPPROTO_TCP);
 621 #endif
 622
 623         home->state = HOME_STATE_ALIVE;
 624         home->currently_outstanding = 0;
 625         home->revive_time = now;
 626
 627         /*
 628          *      Delete any outstanding events.
 629          */
 630         if (home->ev) fr_event_delete(el, &home->ev);
 631
 632         radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
 633                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 634                          buffer, sizeof(buffer)),
 635                home->port);
 636
 637 }
 638
 639
 640 static void no_response_to_ping(void *ctx)
 641 {
 642         REQUEST *request = ctx;
 643         home_server *home;
 644         char buffer[128];
 645
 646         rad_assert(request->home_server != NULL);
 647
 648         home = request->home_server;
 649 #ifdef WITH_TCP
 650         rad_assert(home->proto != IPPROTO_TCP);
 651 #endif
 652
 653         home->num_received_pings = 0;
 654
 655         RDEBUG2("No response to status check %d from home server %s port %d",
 656                request->number,
 657                inet_ntop(request->proxy->dst_ipaddr.af,
 658                          &request->proxy->dst_ipaddr.ipaddr,
 659                          buffer, sizeof(buffer)),
 660                request->proxy->dst_port);
 661
 662         wait_for_proxy_id_to_expire(request);
 663 }
 664
 665
 666 static void received_response_to_ping(REQUEST *request)
 667 {
 668         home_server *home;
 669         char buffer[128];
 670
 671         rad_assert(request->home_server != NULL);
 672
 673         home = request->home_server;
 674 #ifdef WITH_TCP
 675         rad_assert(home->proto != IPPROTO_TCP);
 676 #endif
 677
 678         home->num_received_pings++;
 679
 680         RDEBUG2("Received response to status check %d (%d in current sequence)",
 681                request->number, home->num_received_pings);
 682
 683         /*
 684          *      Remove the request from any hashes
 685          */
 686         fr_event_delete(el, &request->ev);
 687         remove_from_proxy_hash(request);
 688         rad_assert(request->in_request_hash == FALSE);
 689
 690         /*
 691          *      The control socket may have marked the home server as
 692          *      alive.  OR, it may have suddenly started responding to
 693          *      requests again.  If so, don't re-do the "make alive"
 694          *      work.
 695          */
 696         if (home->state == HOME_STATE_ALIVE) return;
 697
 698         /*
 699          *      We haven't received enough ping responses to mark it
 700          *      "alive".  Wait a bit.
 701          */
 702         if (home->num_received_pings < home->num_pings_to_alive) {
 703                 return;
 704         }
 705
 706         home->state = HOME_STATE_ALIVE;
 707         home->currently_outstanding = 0;
 708         home->revive_time = now;
 709
 710         if (!fr_event_delete(el, &home->ev)) {
 711                 RDEBUG2("Hmm... no event for home server.  Oh well.");
 712         }
 713
 714         radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
 715                inet_ntop(request->proxy->dst_ipaddr.af,
 716                          &request->proxy->dst_ipaddr.ipaddr,
 717                          buffer, sizeof(buffer)),
 718                request->proxy->dst_port);
 719 }
 720
 721
 722 /*
 723  *      Called from start of zombie period, OR after control socket
 724  *      marks the home server dead.
 725  */
 726 static void ping_home_server(void *ctx)
 727 {
 728         uint32_t jitter;
 729         home_server *home = ctx;
 730         REQUEST *request;
 731         VALUE_PAIR *vp;
 732
 733 #ifdef WITH_TCP
 734         rad_assert(home->proto != IPPROTO_TCP);
 735 #endif
 736
 737         if ((home->state == HOME_STATE_ALIVE) ||
 738             (home->ping_check == HOME_PING_CHECK_NONE) ||
 739             (home->ev != NULL)) {
 740                 return;
 741         }
 742
 743         request = request_alloc();
 744         request->number = request_num_counter++;
 745
 746         request->proxy = rad_alloc(1);
 747         rad_assert(request->proxy != NULL);
 748
 749         fr_event_now(el, &request->when);
 750         home->when = request->when;
 751
 752         if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
 753                 request->proxy->code = PW_STATUS_SERVER;
 754
 755                 radius_pairmake(request, &request->proxy->vps,
 756                                 "Message-Authenticator", "0x00", T_OP_SET);
 757
 758         } else if (home->type == HOME_TYPE_AUTH) {
 759                 request->proxy->code = PW_AUTHENTICATION_REQUEST;
 760
 761                 radius_pairmake(request, &request->proxy->vps,
 762                                 "User-Name", home->ping_user_name, T_OP_SET);
 763                 radius_pairmake(request, &request->proxy->vps,
 764                                 "User-Password", home->ping_user_password, T_OP_SET);
 765                 radius_pairmake(request, &request->proxy->vps,
 766                                 "Service-Type", "Authenticate-Only", T_OP_SET);
 767                 radius_pairmake(request, &request->proxy->vps,
 768                                 "Message-Authenticator", "0x00", T_OP_SET);
 769
 770         } else {
 771 #ifdef WITH_ACCOUNTING
 772                 request->proxy->code = PW_ACCOUNTING_REQUEST;
 773
 774                 radius_pairmake(request, &request->proxy->vps,
 775                                 "User-Name", home->ping_user_name, T_OP_SET);
 776                 radius_pairmake(request, &request->proxy->vps,
 777                                 "Acct-Status-Type", "Stop", T_OP_SET);
 778                 radius_pairmake(request, &request->proxy->vps,
 779                                 "Acct-Session-Id", "00000000", T_OP_SET);
 780                 vp = radius_pairmake(request, &request->proxy->vps,
 781                                      "Event-Timestamp", "0", T_OP_SET);
 782                 vp->vp_date = now.tv_sec;
 783 #else
 784                 rad_assert("Internal sanity check failed");
 785 #endif
 786         }
 787
 788         radius_pairmake(request, &request->proxy->vps,
 789                         "NAS-Identifier", "Status Check. Are you alive?",
 790                         T_OP_SET);
 791
 792         request->proxy->dst_ipaddr = home->ipaddr;
 793         request->proxy->dst_port = home->port;
 794         request->home_server = home;
 795
 796         rad_assert(request->proxy_listener == NULL);
 797
 798         if (!insert_into_proxy_hash(request, FALSE)) {
 799                 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash.  Discarding it.",
 800                        request->number);
 801                 ev_request_free(&request);
 802                 return;
 803         }
 804         rad_assert(request->proxy_listener != NULL);
 805         request->proxy_listener->send(request->proxy_listener,
 806                                       request);
 807
 808         request->next_callback = NULL;
 809         request->child_state = REQUEST_PROXIED;
 810         request->when.tv_sec += home->ping_timeout;;
 811
 812         INSERT_EVENT(no_response_to_ping, request);
 813
 814         /*
 815          *      Add +/- 2s of jitter, as suggested in RFC 3539
 816          *      and in the Issues and Fixes draft.
 817          */
 818         home->when.tv_sec += home->ping_interval - 2;
 819
 820         jitter = fr_rand();
 821         jitter ^= (jitter >> 10);
 822         jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
 823
 824         tv_add(&home->when, jitter);
 825
 826         INSERT_EVENT(ping_home_server, home);
 827 }
 828
 829
 830 void mark_home_server_dead(home_server *home, struct timeval *when)
 831 {
 832         int previous_state = home->state;
 833         char buffer[128];
 834
 835         radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
 836                inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
 837                          buffer, sizeof(buffer)),
 838                home->port);
 839
 840         home->state = HOME_STATE_IS_DEAD;
 841         home->num_received_pings = 0;
 842
 843         if (home->ping_check != HOME_PING_CHECK_NONE) {
 844                 /*
 845                  *      If the control socket marks us dead, start
 846                  *      pinging.  Otherwise, we already started
 847                  *      pinging when it was marked "zombie".
 848                  */
 849                 if (previous_state == HOME_STATE_ALIVE) {
 850                         ping_home_server(home);
 851                 }
 852
 853         } else {
 854                 /*
 855                  *      Revive it after a fixed period of time.  This
 856                  *      is very, very, bad.
 857                  */
 858                 home->when = *when;
 859                 home->when.tv_sec += home->revive_interval;
 860
 861                 INSERT_EVENT(revive_home_server, home);
 862         }
 863 }
 864
 865 static void check_for_zombie_home_server(REQUEST *request)
 866 {
 867         home_server *home;
 868         struct timeval when;
 869
 870         home = request->home_server;
 871
 872         if (home->state != HOME_STATE_ZOMBIE) return;
 873
 874         when = home->zombie_period_start;
 875         when.tv_sec += home->zombie_period;
 876
 877         fr_event_now(el, &now);
 878         if (timercmp(&now, &when, <)) {
 879                 return;
 880         }
 881
 882         mark_home_server_dead(home, &request->when);
 883 }
 884
 885 static int proxy_to_virtual_server(REQUEST *request);
 886
 887 static int virtual_server_handler(UNUSED REQUEST *request)
 888 {
 889         proxy_to_virtual_server(request);
 890         return 0;
 891 }
 892
 893 static void proxy_fallback_handler(REQUEST *request)
 894 {
 895         /*
 896          *      A proper time is required for wait_a_bit.
 897          */
 898         request->delay = USEC / 10;
 899         gettimeofday(&now, NULL);
 900         request->next_when = now;
 901         tv_add(&request->next_when, request->delay);
 902         request->next_callback = wait_a_bit;
 903
 904         /*
 905          *      Re-queue the request.
 906          */
 907         request->child_state = REQUEST_QUEUED;
 908
 909         rad_assert(request->proxy != NULL);
 910         if (!thread_pool_addrequest(request, virtual_server_handler)) {
 911                 request->child_state = REQUEST_DONE;
 912         }
 913
 914 #ifdef HAVE_PTHREAD_H
 915         /*
 916          *      MAY free the request if we're over max_request_time,
 917          *      AND we're not in threaded mode!
 918          *
 919          *      Note that we call this ONLY if we're threaded, as
 920          *      if we're NOT threaded, request_post_handler() calls
 921          *      wait_a_bit(), which means that "request" may not
 922          *      exist any more...
 923          */
 924         if (have_children) wait_a_bit(request);
 925 #endif
 926 }
 927
 928
 929 static int setup_post_proxy_fail(REQUEST *request)
 930 {
 931         DICT_VALUE *dval = NULL;
 932         VALUE_PAIR *vp;
 933
 934         request->child_state = REQUEST_RUNNING;
 935
 936         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
 937                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
 938
 939         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
 940                 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
 941
 942 #ifdef WITH_COA
 943                 /*
 944                  *      See no_response_to_coa_request
 945                  */
 946         } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
 947                 request->packet->code &= 0xff; /* restore it */
 948
 949                 if (request->proxy->code == PW_COA_REQUEST) {
 950                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
 951
 952                 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
 953                         dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
 954                 } else {
 955                         return 0;
 956                 }
 957
 958 #endif
 959         } else {
 960                 return 0;
 961         }
 962
 963         if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
 964
 965         if (!dval) {
 966                 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
 967                 return 0;
 968         }
 969
 970         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
 971         if (!vp) vp = radius_paircreate(request, &request->config_items,
 972                                         PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
 973         vp->vp_integer = dval->value;
 974
 975         rad_assert(request->proxy_reply == NULL);
 976
 977         return 1;
 978 }
 979
 980
 981 static int null_handler(UNUSED REQUEST *request)
 982 {
 983         return 0;
 984 }
 985
 986 static void post_proxy_fail_handler(REQUEST *request)
 987 {
 988         /*
 989          *      A proper time is required for wait_a_bit.
 990          */
 991         request->delay = USEC / 10;
 992         gettimeofday(&now, NULL);
 993
 994         /*
 995          *      Not set up to run Post-Proxy-Type = Fail.
 996          *
 997          *      Mark the request as still running, and figure out what
 998          *      to do next.
 999          */
1000         if (!setup_post_proxy_fail(request)) {
1001                 request_post_handler(request);
1002
1003         } else {
1004                 /*
1005                  *      Re-queue the request.
1006                  */
1007                 request->child_state = REQUEST_QUEUED;
1008
1009                 /*
1010                  *      There is a post-proxy-type of fail.  We run
1011                  *      the request through the pre/post proxy
1012                  *      handlers, just like it was a real proxied
1013                  *      request.  However, we set the per-request
1014                  *      handler to NULL, as we don't want to do
1015                  *      anything else.
1016                  *
1017                  *      Note that when we're not threaded, this will
1018                  *      process the request even if it's greater than
1019                  *      max_request_time.  That's not fatal.
1020                  */
1021                 request->priority = 0;
1022                 rad_assert(request->proxy != NULL);
1023                 thread_pool_addrequest(request, null_handler);
1024         }
1025
1026         /*
1027          *      MAY free the request if we're over max_request_time,
1028          *      AND we're not in threaded mode!
1029          *
1030          *      Note that we call this ONLY if we're threaded, as
1031          *      if we're NOT threaded, request_post_handler() calls
1032          *      wait_a_bit(), which means that "request" may not
1033          *      exist any more...
1034          */
1035         if (have_children) wait_a_bit(request);
1036 }
1037
1038
1039 /* maybe check this against wait_for_proxy_id_to_expire? */
1040 static void no_response_to_proxied_request(void *ctx)
1041 {
1042         REQUEST *request = ctx;
1043         home_server *home;
1044         char buffer[128];
1045
1046         rad_assert(request->magic == REQUEST_MAGIC);
1047         rad_assert(request->child_state == REQUEST_PROXIED);
1048
1049         /*
1050          *      If we've failed over to an internal home server,
1051          *      replace the callback with the correct one.  This
1052          *      is due to locking issues with child threads...
1053          */
1054         if (request->home_server->server) {
1055                 wait_a_bit(request);
1056                 return;
1057         }
1058
1059         check_for_zombie_home_server(request);
1060
1061         home = request->home_server;
1062
1063         /*
1064          *      The default as of 2.1.7 is to allow requests to
1065          *      fail-over to a backup home server when this one does
1066          *      not respond.  The old behavior can be configured as
1067          *      well.
1068          */
1069         if (home->no_response_fail) {
1070                 radlog(L_ERR, "Rejecting request %d (proxy Id %d) due to lack of any response from home server %s port %d",
1071                        request->number, request->proxy->id,
1072                        inet_ntop(request->proxy->dst_ipaddr.af,
1073                                  &request->proxy->dst_ipaddr.ipaddr,
1074                                  buffer, sizeof(buffer)),
1075                        request->proxy->dst_port);
1076
1077                 post_proxy_fail_handler(request);
1078         }
1079
1080         /*
1081          *      Don't touch request due to race conditions
1082          */
1083         if (home->state == HOME_STATE_IS_DEAD) {
1084                 rad_assert(home->ev != NULL); /* or it will never wake up */
1085                 return;
1086         }
1087
1088         /*
1089          *      Enable the zombie period when we notice that the home
1090          *      server hasn't responded.  We do NOT back-date the start
1091          *      of the zombie period.
1092          */
1093         if (home->state == HOME_STATE_ALIVE) {
1094                 home->state = HOME_STATE_ZOMBIE;
1095                 home->zombie_period_start = now;
1096
1097                 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1098                        inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1099                                  buffer, sizeof(buffer)),
1100                        home->port);
1101
1102                 /*
1103                  *      Start pinging the home server.
1104                  */
1105                 ping_home_server(home);
1106         }
1107 }
1108 #endif
1109
1110 static void wait_a_bit(void *ctx)
1111 {
1112         struct timeval when;
1113         REQUEST *request = ctx;
1114         fr_event_callback_t callback = NULL;
1115
1116         rad_assert(request->magic == REQUEST_MAGIC);
1117
1118         /*
1119          *      The socket was closed.  Tell the request that
1120          *      there is no point in continuing.
1121          */
1122         if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1123                 goto stop_processing;
1124         }
1125
1126 #ifdef WITH_COA
1127         /*
1128          *      The CoA request is a new (internally generated)
1129          *      request, created in a child thread.  We therefore need
1130          *      some way to tie its events back into the main event
1131          *      handler.
1132          */
1133         if (request->coa && !request->coa->proxy_reply &&
1134             request->coa->next_callback) {
1135                 request->coa->when = request->coa->next_when;
1136                 INSERT_EVENT(request->coa->next_callback, request->coa);
1137                 request->coa->next_callback = NULL;
1138                 request->coa->parent = NULL;
1139                 request->coa = NULL;
1140         }
1141 #endif
1142
1143         switch (request->child_state) {
1144         case REQUEST_QUEUED:
1145         case REQUEST_RUNNING:
1146                 when = request->received;
1147                 when.tv_sec += request->root->max_request_time;
1148
1149                 /*
1150                  *      Normally called from the event loop with the
1151                  *      proper event loop time.  Otherwise, called from
1152                  *      post proxy fail handler, which sets "now", and
1153                  *      this call won't re-set it, because we're not
1154                  *      in the event loop.
1155                  */
1156                 fr_event_now(el, &now);
1157
1158                 /*
1159                  *      Request still has more time.  Continue
1160                  *      waiting.
1161                  */
1162                 if (timercmp(&now, &when, <) ||
1163                     ((request->listener->type == RAD_LISTEN_DETAIL) &&
1164                      (request->child_state == REQUEST_QUEUED))) {
1165                         if (request->delay < (USEC / 10)) {
1166                                 request->delay = USEC / 10;
1167                         }
1168                         request->delay += request->delay >> 1;
1169
1170 #ifdef WITH_DETAIL
1171                         /*
1172                          *      Cap wait at some sane value for detail
1173                          *      files.
1174                          */
1175                         if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1176                             (request->delay > (request->root->max_request_time * USEC))) {
1177                                 request->delay = request->root->max_request_time * USEC;
1178                         }
1179 #endif
1180
1181                         request->when = now;
1182                         tv_add(&request->when, request->delay);
1183                         callback = wait_a_bit;
1184                         break;
1185                 }
1186
1187 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1188                 /*
1189                  *      A child thread MAY still be running on the
1190                  *      request.  Ask the thread to stop working on
1191                  *      the request.
1192                  */
1193                 if (have_children) {
1194                         /* FIXME: kill unresponsive children? */
1195
1196                         /*
1197                          *      Print this error message ONLY if
1198                          *      there's a child currently processing
1199                          *      the request.  As we don't have thread
1200                          *      locks here, there may be race
1201                          *      conditions on this check.  But it's
1202                          *      just an error message, so that's OK.
1203                          */
1204                         if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1205                                 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1206                                        request->number,
1207                                        request->module ? request->module : "<server core>",
1208                                        request->component ? request->component : "<server core>");
1209                         }
1210
1211                 stop_processing:
1212                         request->master_state = REQUEST_STOP_PROCESSING;
1213
1214                         request->delay = USEC / 4;
1215                         tv_add(&request->when, request->delay);
1216                         callback = wait_for_child_to_die;
1217                         break;
1218                 }
1219 #else  /* no child threads */
1220         stop_processing:
1221 #endif
1222
1223                 /*
1224                  *      Else there are no child threads.  We probably
1225                  *      should have just marked the request as 'done'
1226                  *      elsewhere, like in the post-proxy-fail
1227                  *      handler.  But doing that would involve
1228                  *      checking for max_request_time in multiple
1229                  *      places, so this may be simplest.
1230                  */
1231                 request->child_state = REQUEST_DONE;
1232                 /* FALL-THROUGH */
1233
1234                 /*
1235                  *      Mark the request as no longer running,
1236                  *      and clean it up.
1237                  */
1238         case REQUEST_DONE:
1239 #ifdef HAVE_PTHREAD_H
1240                 request->child_pid = NO_SUCH_CHILD_PID;
1241 #endif
1242
1243 #ifdef WTH_COA
1244                 /*
1245                  *      This is a CoA request.  It's been divorced
1246                  *      from everything else, so we clean it up now.
1247                  */
1248                 if (!request->in_request_hash &&
1249                     request->proxy &&
1250                     (request->packet->code != request->proxy->code) &&
1251                     ((request->proxy->code == PW_COA_REQUEST) ||
1252                      (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1253                         /*
1254                          *      FIXME: Do CoA MIBs
1255                          */
1256                         ev_request_free(&request);
1257                         return;
1258                 }
1259 #endif
1260                 request_stats_final(request);
1261                 cleanup_delay(request);
1262                 return;
1263
1264         case REQUEST_REJECT_DELAY:
1265         case REQUEST_CLEANUP_DELAY:
1266 #ifdef HAVE_PTHREAD_H
1267                 request->child_pid = NO_SUCH_CHILD_PID;
1268 #endif
1269                 request_stats_final(request);
1270
1271         case REQUEST_PROXIED:
1272                 rad_assert(request->next_callback != NULL);
1273                 rad_assert(request->next_callback != wait_a_bit);
1274
1275                 request->when = request->next_when;
1276                 callback = request->next_callback;
1277                 request->next_callback = NULL;
1278                 break;
1279
1280         default:
1281                 rad_panic("Internal sanity check failure");
1282                 return;
1283         }
1284
1285         /*
1286          *      Something major went wrong.  Discard the request, and
1287          *      keep running.
1288          *
1289          *      FIXME: No idea why this happens or how to fix it...
1290          *      It seems to happen *only* when requests are proxied,
1291          *      and where the home server doesn't respond.  So it looks
1292          *      like a race condition above, but it happens in debug
1293          *      mode, with no threads...
1294          */
1295         if (!callback) {
1296                 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1297                 ev_request_free(&request);
1298                 return;
1299         }
1300
1301         INSERT_EVENT(callback, request);
1302 }
1303
1304 #ifdef WITH_COA
1305 static void no_response_to_coa_request(void *ctx)
1306 {
1307         REQUEST *request = ctx;
1308         char buffer[128];
1309
1310         rad_assert(request->magic == REQUEST_MAGIC);
1311         rad_assert(request->child_state == REQUEST_PROXIED);
1312         rad_assert(request->home_server != NULL);
1313         rad_assert(!request->in_request_hash);
1314
1315         radlog(L_ERR, "No response to CoA request sent to %s",
1316                inet_ntop(request->proxy->dst_ipaddr.af,
1317                          &request->proxy->dst_ipaddr.ipaddr,
1318                          buffer, sizeof(buffer)));
1319
1320         /*
1321          *      Hack.
1322          */
1323         request->packet->code |= (PW_COA_REQUEST << 8);
1324         post_proxy_fail_handler(request);
1325 }
1326
1327
1328 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1329 {
1330         VALUE_PAIR *vp;
1331
1332         vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1333         if (!vp) return 0;
1334
1335         vp->vp_date = when;
1336
1337         if (packet->data) {
1338                 free(packet->data);
1339                 packet->data = NULL;
1340                 packet->data_len = 0;
1341         }
1342
1343         return 1;               /* time stamp updated */
1344 }
1345
1346
1347 /*
1348  *      Called when we haven't received a response to a CoA request.
1349  */
1350 static void retransmit_coa_request(void *ctx)
1351 {
1352         int delay, frac;
1353         struct timeval mrd;
1354         REQUEST *request = ctx;
1355
1356         rad_assert(request->magic == REQUEST_MAGIC);
1357         rad_assert(request->child_state == REQUEST_PROXIED);
1358         rad_assert(request->home_server != NULL);
1359         rad_assert(!request->in_request_hash);
1360         rad_assert(request->parent == NULL);
1361
1362         fr_event_now(el, &now);
1363
1364         /*
1365          *      Cap count at MRC, if it is non-zero.
1366          */
1367         if (request->home_server->coa_mrc &&
1368             (request->num_coa_requests >= request->home_server->coa_mrc)) {
1369                 no_response_to_coa_request(request);
1370                 return;
1371         }
1372
1373         /*
1374          *      RFC 5080 Section 2.2.1
1375          *
1376          *      RT = 2*RTprev + RAND*RTprev
1377          *         = 1.9 * RTprev + rand(0,.2) * RTprev
1378          *         = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1379          */
1380         delay = fr_rand();
1381         delay ^= (delay >> 16);
1382         delay &= 0xffff;
1383         frac = request->delay / 5;
1384         delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1385
1386         delay += (2 * request->delay) - (request->delay / 10);
1387
1388         /*
1389          *      Cap delay at MRT, if MRT is non-zero.
1390          */
1391         if (request->home_server->coa_mrt &&
1392             (delay > (request->home_server->coa_mrt * USEC))) {
1393                 int mrt_usec = request->home_server->coa_mrt * USEC;
1394
1395                 /*
1396                  *      delay = MRT + RAND * MRT
1397                  *            = 0.9 MRT + rand(0,.2)  * MRT
1398                  */
1399                 delay = fr_rand();
1400                 delay ^= (delay >> 15);
1401                 delay &= 0x1ffff;
1402                 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1403                 delay += mrt_usec - (mrt_usec / 10);
1404         }
1405
1406         request->delay = delay;
1407         request->when = now;
1408         tv_add(&request->when, request->delay);
1409         mrd = request->proxy_when;
1410         mrd.tv_sec += request->home_server->coa_mrd;
1411
1412         /*
1413          *      Cap duration at MRD.
1414          */
1415         if (timercmp(&mrd, &request->when, <)) {
1416                 request->when = mrd;
1417                 INSERT_EVENT(no_response_to_coa_request, request);
1418
1419         } else {
1420                 INSERT_EVENT(retransmit_coa_request, request);
1421         }
1422
1423         if (update_event_timestamp(request->proxy, now.tv_sec)) {
1424                 if (!insert_into_proxy_hash(request, TRUE)) {
1425                         DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1426                         return;
1427                 }
1428
1429                 request->num_proxied_requests = 0;
1430                 request->num_proxied_responses = 0;
1431         }
1432
1433         request->num_proxied_requests++;
1434         request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1435
1436         request->proxy_listener->send(request->proxy_listener,
1437                                       request);
1438 }
1439
1440
1441 /*
1442  *      The original request is either DONE, or in CLEANUP_DELAY.
1443  */
1444 static int originated_coa_request(REQUEST *request)
1445 {
1446         int delay, rcode, pre_proxy_type = 0;
1447         VALUE_PAIR *vp;
1448         REQUEST *coa;
1449         fr_ipaddr_t ipaddr;
1450         char buffer[256];
1451
1452         rad_assert(request->proxy == NULL);
1453         rad_assert(!request->in_proxy_hash);
1454         rad_assert(request->proxy_reply == NULL);
1455
1456         vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1457         if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1458         if (vp) {
1459                 if (vp->vp_integer == 0) {
1460                         ev_request_free(&request->coa);
1461                         return 1;       /* success */
1462                 }
1463
1464                 if (!request->coa) request_alloc_coa(request);
1465                 if (!request->coa) return 0;
1466         }
1467
1468         coa = request->coa;
1469
1470         /*
1471          *      src_ipaddr will be set up in proxy_encode.
1472          */
1473         memset(&ipaddr, 0, sizeof(ipaddr));
1474         vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1475         if (vp) {
1476                 ipaddr.af = AF_INET;
1477                 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1478
1479         } else if ((vp = pairfind(coa->proxy->vps,
1480                                   PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1481                 ipaddr.af = AF_INET6;
1482                 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1483
1484         } else if ((vp = pairfind(coa->proxy->vps,
1485                                   PW_HOME_SERVER_POOL)) != NULL) {
1486                 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1487                                                   HOME_TYPE_COA);
1488                 if (!coa->home_pool) {
1489                         RDEBUG2("WARNING: No such home_server_pool %s",
1490                                vp->vp_strvalue);
1491         fail:
1492                         ev_request_free(&request->coa);
1493                         return 0;
1494                 }
1495
1496                 /*
1497                  *      Prefer
1498                  */
1499         } else if (request->client->coa_pool) {
1500                 coa->home_pool = request->client->coa_pool;
1501
1502         } else if (request->client->coa_server) {
1503                 coa->home_server = request->client->coa_server;
1504
1505         } else {
1506                 /*
1507                  *      If all else fails, send it to the client that
1508                  *      originated this request.
1509                  */
1510                 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1511         }
1512
1513         /*
1514          *      Use the pool, if it exists.
1515          */
1516         if (coa->home_pool) {
1517                 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1518                 if (!coa->home_server) {
1519                         RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1520                         goto fail;
1521                 }
1522
1523         } else if (!coa->home_server) {
1524                 int port = PW_COA_UDP_PORT;
1525
1526                 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1527                 if (vp) port = vp->vp_integer;
1528
1529                 coa->home_server = home_server_find(&ipaddr, port);
1530                 if (!coa->home_server) {
1531                         RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1532                                inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1533                                          buffer, sizeof(buffer)), port);
1534                         goto fail;
1535                 }
1536         }
1537
1538         vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1539         if (vp) {
1540                 switch (vp->vp_integer) {
1541                 case PW_COA_REQUEST:
1542                 case PW_DISCONNECT_REQUEST:
1543                         coa->proxy->code = vp->vp_integer;
1544                         break;
1545
1546                 default:
1547                         DEBUG("Cannot set CoA Packet-Type to code %d",
1548                               vp->vp_integer);
1549                         goto fail;
1550                 }
1551         }
1552
1553         if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1554
1555         /*
1556          *      The rest of the server code assumes that
1557          *      request->packet && request->reply exist.  Copy them
1558          *      from the original request.
1559          */
1560         rad_assert(coa->packet != NULL);
1561         rad_assert(coa->packet->vps == NULL);
1562         memcpy(coa->packet, request->packet, sizeof(*request->packet));
1563         coa->packet->vps = paircopy(request->packet->vps);
1564         coa->packet->data = NULL;
1565         rad_assert(coa->reply != NULL);
1566         rad_assert(coa->reply->vps == NULL);
1567         memcpy(coa->reply, request->reply, sizeof(*request->reply));
1568         coa->reply->vps = paircopy(request->reply->vps);
1569         coa->reply->data = NULL;
1570         coa->config_items = paircopy(request->config_items);
1571
1572         /*
1573          *      Call the pre-proxy routines.
1574          */
1575         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1576         if (vp) {
1577                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
1578                 pre_proxy_type = vp->vp_integer;
1579         }
1580
1581         if (coa->home_pool && coa->home_pool->virtual_server) {
1582                 const char *old_server = coa->server;
1583
1584                 coa->server = coa->home_pool->virtual_server;
1585                 RDEBUG2(" server %s {", coa->server);
1586                 rcode = module_pre_proxy(pre_proxy_type, coa);
1587                 RDEBUG2(" }");
1588                 coa->server = old_server;
1589         } else {
1590                 rcode = module_pre_proxy(pre_proxy_type, coa);
1591         }
1592         switch (rcode) {
1593         default:
1594                 goto fail;
1595
1596         /*
1597          *      Only send the CoA packet if the pre-proxy code succeeded.
1598          */
1599         case RLM_MODULE_NOOP:
1600         case RLM_MODULE_OK:
1601         case RLM_MODULE_UPDATED:
1602                 break;
1603         }
1604
1605         /*
1606          *      Source IP / port is set when the proxy socket
1607          *      is chosen.
1608          */
1609         coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1610         coa->proxy->dst_port = coa->home_server->port;
1611
1612         if (!insert_into_proxy_hash(coa, FALSE)) {
1613                 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1614                 goto fail;
1615         }
1616
1617         /*
1618          *      We CANNOT divorce the CoA request from the parent
1619          *      request.  This function is running in a child thread,
1620          *      and we need access to the main event loop in order to
1621          *      to add the timers for the CoA packet.  See
1622          *      wait_a_bit().
1623          */
1624
1625         /*
1626          *      Forget about the original request completely at this
1627          *      point.
1628          */
1629         request = coa;
1630
1631         gettimeofday(&request->proxy_when, NULL);
1632         request->received = request->next_when = request->proxy_when;
1633         rad_assert(request->proxy_reply == NULL);
1634
1635         /*
1636          *      Implement re-transmit algorithm as per RFC 5080
1637          *      Section 2.2.1.
1638          *
1639          *      We want IRT + RAND*IRT
1640          *      or 0.9 IRT + rand(0,.2) IRT
1641          *
1642          *      2^20 ~ USEC, and we want 2.
1643          *      rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1644          */
1645         delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1646         request->delay = delay * request->home_server->coa_irt;
1647         delay = request->home_server->coa_irt * USEC;
1648         delay -= delay / 10;
1649         delay += request->delay;
1650
1651         request->delay = delay;
1652         tv_add(&request->next_when, delay);
1653         request->next_callback = retransmit_coa_request;
1654
1655         /*
1656          *      Note that we set proxied BEFORE sending the packet.
1657          *
1658          *      Once we send it, the request is tainted, as
1659          *      another thread may have picked it up.  Don't
1660          *      touch it!
1661          */
1662         request->num_proxied_requests = 1;
1663         request->num_proxied_responses = 0;
1664         request->child_pid = NO_SUCH_CHILD_PID;
1665
1666         update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1667
1668         request->child_state = REQUEST_PROXIED;
1669
1670         DEBUG_PACKET(request, request->proxy, 1);
1671
1672         request->proxy_listener->send(request->proxy_listener,
1673                                       request);
1674         return 1;
1675 }
1676 #endif  /* WITH_COA */
1677
1678 #ifdef WITH_PROXY
1679 static int process_proxy_reply(REQUEST *request)
1680 {
1681         int rcode;
1682         int post_proxy_type = 0;
1683         VALUE_PAIR *vp;
1684
1685         /*
1686          *      Delete any reply we had accumulated until now.
1687          */
1688         pairfree(&request->reply->vps);
1689
1690         /*
1691          *      Run the packet through the post-proxy stage,
1692          *      BEFORE playing games with the attributes.
1693          */
1694         vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1695         if (vp) {
1696                 RDEBUG2("  Found Post-Proxy-Type %s", vp->vp_strvalue);
1697                 post_proxy_type = vp->vp_integer;
1698         }
1699
1700         if (request->home_pool && request->home_pool->virtual_server) {
1701                 const char *old_server = request->server;
1702
1703                 request->server = request->home_pool->virtual_server;
1704                 RDEBUG2(" server %s {", request->server);
1705                 rcode = module_post_proxy(post_proxy_type, request);
1706                 RDEBUG2(" }");
1707                 request->server = old_server;
1708         } else {
1709                 rcode = module_post_proxy(post_proxy_type, request);
1710         }
1711
1712 #ifdef WITH_COA
1713         if (request->packet->code == request->proxy->code)
1714           /*
1715            *    Don't run the next bit if we originated a CoA
1716            *    packet, after receiving an Access-Request or
1717            *    Accounting-Request.
1718            */
1719 #endif
1720
1721         /*
1722          *      There may NOT be a proxy reply, as we may be
1723          *      running Post-Proxy-Type = Fail.
1724          */
1725         if (request->proxy_reply) {
1726                 /*
1727                  *      Delete the Proxy-State Attributes from
1728                  *      the reply.  These include Proxy-State
1729                  *      attributes from us and remote server.
1730                  */
1731                 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1732
1733                 /*
1734                  *      Add the attributes left in the proxy
1735                  *      reply to the reply list.
1736                  */
1737                 pairadd(&request->reply->vps, request->proxy_reply->vps);
1738                 request->proxy_reply->vps = NULL;
1739
1740                 /*
1741                  *      Free proxy request pairs.
1742                  */
1743                 pairfree(&request->proxy->vps);
1744         }
1745
1746         switch (rcode) {
1747         default:  /* Don't do anything */
1748                 break;
1749         case RLM_MODULE_FAIL:
1750                 /* FIXME: debug print stuff */
1751                 request->child_state = REQUEST_DONE;
1752                 return 0;
1753
1754         case RLM_MODULE_HANDLED:
1755                 /* FIXME: debug print stuff */
1756                 request->child_state = REQUEST_DONE;
1757                 return 0;
1758         }
1759
1760         return 1;
1761 }
1762 #endif
1763
1764 static int request_pre_handler(REQUEST *request)
1765 {
1766         int rcode;
1767
1768         rad_assert(request->magic == REQUEST_MAGIC);
1769         rad_assert(request->packet != NULL);
1770
1771         request->child_state = REQUEST_RUNNING;
1772
1773         /*
1774          *      Don't decode the packet if it's an internal "fake"
1775          *      request.  Instead, just return so that the caller can
1776          *      process it.
1777          */
1778         if (request->packet->dst_port == 0) {
1779                 request->username = pairfind(request->packet->vps,
1780                                              PW_USER_NAME);
1781                 request->password = pairfind(request->packet->vps,
1782                                              PW_USER_PASSWORD);
1783                 return 1;
1784         }
1785
1786 #ifdef WITH_PROXY
1787         /*
1788          *      Put the decoded packet into it's proper place.
1789          */
1790         if (request->proxy_reply != NULL) {
1791                 rcode = request->proxy_listener->decode(request->proxy_listener,
1792                                                         request);
1793                 DEBUG_PACKET(request, request->proxy_reply, 0);
1794         } else
1795 #endif
1796         if (request->packet->vps == NULL) {
1797                 rcode = request->listener->decode(request->listener, request);
1798
1799                 if (debug_condition) {
1800                         int result = FALSE;
1801                         const char *my_debug = debug_condition;
1802
1803                         /*
1804                          *      Ignore parse errors.
1805                          */
1806                         radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1807                                                   &my_debug, 1,
1808                                                   &result);
1809                         if (result) {
1810                                 request->options = 2;
1811                                 request->radlog = radlog_request;
1812                         }
1813                 }
1814
1815                 DEBUG_PACKET(request, request->packet, 0);
1816         } else {
1817                 rcode = 0;
1818         }
1819
1820         if (rcode < 0) {
1821                 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1822                 request->child_state = REQUEST_DONE;
1823                 return 0;
1824         }
1825
1826         if (!request->username) {
1827                 request->username = pairfind(request->packet->vps,
1828                                              PW_USER_NAME);
1829         }
1830
1831 #ifdef WITH_PROXY
1832         if (request->proxy) {
1833                 return process_proxy_reply(request);
1834 #endif
1835         }
1836
1837         return 1;
1838 }
1839
1840
1841 #ifdef WITH_PROXY
1842 /*
1843  *      Do state handling when we proxy a request.
1844  */
1845 static int proxy_request(REQUEST *request)
1846 {
1847         struct timeval when;
1848         char buffer[128];
1849
1850         if (request->home_server->server) {
1851                 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1852                 return 0;
1853         }
1854
1855         if (!insert_into_proxy_hash(request, FALSE)) {
1856                 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1857                 return 0;
1858         }
1859
1860         request->proxy_listener->encode(request->proxy_listener, request);
1861
1862         when = request->received;
1863         when.tv_sec += request->root->max_request_time;
1864
1865         gettimeofday(&request->proxy_when, NULL);
1866
1867         request->next_when = request->proxy_when;
1868         request->next_when.tv_sec += request->home_server->response_window;
1869
1870         rad_assert(request->home_server->response_window > 0);
1871
1872         if (timercmp(&when, &request->next_when, <)) {
1873                 request->next_when = when;
1874         }
1875         request->next_callback = no_response_to_proxied_request;
1876
1877         RDEBUG2("Proxying request %d to home server %s port %d",
1878                request->number,
1879                inet_ntop(request->proxy->dst_ipaddr.af,
1880                          &request->proxy->dst_ipaddr.ipaddr,
1881                          buffer, sizeof(buffer)),
1882                request->proxy->dst_port);
1883
1884         /*
1885          *      Note that we set proxied BEFORE sending the packet.
1886          *
1887          *      Once we send it, the request is tainted, as
1888          *      another thread may have picked it up.  Don't
1889          *      touch it!
1890          */
1891         request->num_proxied_requests = 1;
1892         request->num_proxied_responses = 0;
1893 #ifdef HAVE_PTHREAD_H
1894         request->child_pid = NO_SUCH_CHILD_PID;
1895 #endif
1896         request->child_state = REQUEST_PROXIED;
1897
1898         DEBUG_PACKET(request, request->proxy, 1);
1899
1900         request->proxy_listener->send(request->proxy_listener,
1901                                       request);
1902         return 1;
1903 }
1904
1905
1906 /*
1907  *      "Proxy" the request by sending it to a new virtual server.
1908  */
1909 static int proxy_to_virtual_server(REQUEST *request)
1910 {
1911         REQUEST *fake;
1912         RAD_REQUEST_FUNP fun;
1913
1914         if (!request->home_server || !request->home_server->server) return 0;
1915
1916         if (request->parent) {
1917                 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1918                 return 0;
1919         }
1920
1921         fake = request_alloc_fake(request);
1922         if (!fake) {
1923                 RDEBUG2("WARNING: Out of memory");
1924                 return 0;
1925         }
1926
1927         fake->packet->vps = paircopy(request->proxy->vps);
1928         fake->server = request->home_server->server;
1929
1930         if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1931                 fun = rad_authenticate;
1932
1933 #ifdef WITH_ACCOUNTING
1934         } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1935                 fun = rad_accounting;
1936 #endif
1937
1938         } else {
1939                 RDEBUG2("Unknown packet type %d", request->proxy->code);
1940                 ev_request_free(&fake);
1941                 return 0;
1942         }
1943
1944         RDEBUG2(">>> Sending proxied request internally to virtual server.");
1945         radius_handle_request(fake, fun);
1946         RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
1947
1948         if (fake->reply->code != 0) {
1949                 request->proxy_reply = fake->reply;
1950                 fake->reply = NULL;
1951         } else {
1952                 /*
1953                  *      There was no response
1954                  */
1955                 setup_post_proxy_fail(request);
1956         }
1957
1958         ev_request_free(&fake);
1959
1960         process_proxy_reply(request);
1961
1962         /*
1963          *      Process it through the normal section again, but ONLY
1964          *      if we received a proxy reply..
1965          */
1966         if (request->proxy_reply) {
1967                 if (request->server) RDEBUG("server %s {",
1968                                             request->server != NULL ?
1969                                             request->server : "");
1970                 fun(request);
1971
1972                 if (request->server) RDEBUG("} # server %s",
1973                                             request->server != NULL ?
1974                                             request->server : "");
1975         }
1976
1977         return 2;               /* success, but NOT '1' !*/
1978 }
1979
1980 /*
1981  *      Return 1 if we did proxy it, or the proxy attempt failed
1982  *      completely.  Either way, the caller doesn't touch the request
1983  *      any more if we return 1.
1984  */
1985 static int successfully_proxied_request(REQUEST *request)
1986 {
1987         int rcode;
1988         int pre_proxy_type = 0;
1989         VALUE_PAIR *realmpair;
1990         VALUE_PAIR *strippedname;
1991         VALUE_PAIR *vp;
1992         char *realmname = NULL;
1993         home_server *home;
1994         REALM *realm = NULL;
1995         home_pool_t *pool;
1996
1997         /*
1998          *      If it was already proxied, do nothing.
1999          *
2000          *      FIXME: This should really be a serious error.
2001          */
2002         if (request->in_proxy_hash ||
2003             (request->proxy_reply && (request->proxy_reply->code != 0))) {
2004                 return 0;
2005         }
2006
2007         realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2008         if (!realmpair || (realmpair->length == 0)) {
2009                 int pool_type;
2010
2011                 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2012                 if (!vp) return 0;
2013
2014                 switch (request->packet->code) {
2015                 case PW_AUTHENTICATION_REQUEST:
2016                         pool_type = HOME_TYPE_AUTH;
2017                         break;
2018
2019 #ifdef WITH_ACCOUNTING
2020                 case PW_ACCOUNTING_REQUEST:
2021                         pool_type = HOME_TYPE_ACCT;
2022                         break;
2023 #endif
2024
2025 #ifdef WITH_COA
2026                 case PW_COA_REQUEST:
2027                 case PW_DISCONNECT_REQUEST:
2028                         pool_type = HOME_TYPE_COA;
2029                         break;
2030 #endif
2031
2032                 default:
2033                         return 0;
2034                 }
2035
2036                 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2037                 if (!pool) {
2038                         RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2039                                 vp->vp_strvalue);
2040                         return 0;
2041                 }
2042
2043                 realmname = NULL; /* no realms */
2044                 realm = NULL;
2045                 goto found_pool;
2046         }
2047
2048         realmname = (char *) realmpair->vp_strvalue;
2049
2050         realm = realm_find2(realmname);
2051         if (!realm) {
2052                 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2053                 return 0;
2054         }
2055
2056         /*
2057          *      Figure out which pool to use.
2058          */
2059         if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2060                 pool = realm->auth_pool;
2061
2062 #ifdef WITH_ACCOUNTING
2063         } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2064                 pool = realm->acct_pool;
2065 #endif
2066
2067 #ifdef WITH_COA
2068         } else if ((request->packet->code == PW_COA_REQUEST) ||
2069                    (request->packet->code == PW_DISCONNECT_REQUEST)) {
2070                 pool = realm->acct_pool;
2071 #endif
2072
2073         } else {
2074                 rad_panic("Internal sanity check failed");
2075         }
2076
2077         if (!pool) {
2078                 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2079                        realmname);
2080                 return 0;
2081         }
2082
2083 found_pool:
2084         home = home_server_ldb(realmname, pool, request);
2085         if (!home) {
2086                 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2087                        realmname);
2088                 return -1;
2089         }
2090         request->home_pool = pool;
2091
2092 #ifdef WITH_COA
2093         /*
2094          *      Once we've decided to proxy a request, we cannot send
2095          *      a CoA packet.  So we free up any CoA packet here.
2096          */
2097         ev_request_free(&request->coa);
2098 #endif
2099         /*
2100          *      Remember that we sent the request to a Realm.
2101          */
2102         if (realmname) pairadd(&request->packet->vps,
2103                                pairmake("Realm", realmname, T_OP_EQ));
2104
2105         /*
2106          *      Strip the name, if told to.
2107          *
2108          *      Doing it here catches the case of proxied tunneled
2109          *      requests.
2110          */
2111         if (realm && (realm->striprealm == TRUE) &&
2112            (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2113                 /*
2114                  *      If there's a Stripped-User-Name attribute in
2115                  *      the request, then use THAT as the User-Name
2116                  *      for the proxied request, instead of the
2117                  *      original name.
2118                  *
2119                  *      This is done by making a copy of the
2120                  *      Stripped-User-Name attribute, turning it into
2121                  *      a User-Name attribute, deleting the
2122                  *      Stripped-User-Name and User-Name attributes
2123                  *      from the vps list, and making the new
2124                  *      User-Name the head of the vps list.
2125                  */
2126                 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2127                 if (!vp) {
2128                         vp = radius_paircreate(request, NULL,
2129                                                PW_USER_NAME, PW_TYPE_STRING);
2130                         rad_assert(vp != NULL); /* handled by above function */
2131                         /* Insert at the START of the list */
2132                         vp->next = request->proxy->vps;
2133                         request->proxy->vps = vp;
2134                 }
2135                 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2136                        sizeof(vp->vp_strvalue));
2137                 vp->length = strippedname->length;
2138
2139                 /*
2140                  *      Do NOT delete Stripped-User-Name.
2141                  */
2142         }
2143
2144         /*
2145          *      If there is no PW_CHAP_CHALLENGE attribute but
2146          *      there is a PW_CHAP_PASSWORD we need to add it
2147          *      since we can't use the request authenticator
2148          *      anymore - we changed it.
2149          */
2150         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2151             pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2152             pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2153                 vp = radius_paircreate(request, &request->proxy->vps,
2154                                        PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2155                 vp->length = AUTH_VECTOR_LEN;
2156                 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2157         }
2158
2159         /*
2160          *      The RFC's say we have to do this, but FreeRADIUS
2161          *      doesn't need it.
2162          */
2163         vp = radius_paircreate(request, &request->proxy->vps,
2164                                PW_PROXY_STATE, PW_TYPE_OCTETS);
2165         snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2166                  request->packet->id);
2167         vp->length = strlen(vp->vp_strvalue);
2168
2169         /*
2170          *      Should be done BEFORE inserting into proxy hash, as
2171          *      pre-proxy may use this information, or change it.
2172          */
2173         request->proxy->code = request->packet->code;
2174
2175         /*
2176          *      Call the pre-proxy routines.
2177          */
2178         vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2179         if (vp) {
2180                 RDEBUG2("  Found Pre-Proxy-Type %s", vp->vp_strvalue);
2181                 pre_proxy_type = vp->vp_integer;
2182         }
2183
2184         rad_assert(request->home_pool != NULL);
2185
2186         if (request->home_pool->virtual_server) {
2187                 const char *old_server = request->server;
2188
2189                 request->server = request->home_pool->virtual_server;
2190                 RDEBUG2(" server %s {", request->server);
2191                 rcode = module_pre_proxy(pre_proxy_type, request);
2192                 RDEBUG2(" }");
2193                         request->server = old_server;
2194         } else {
2195                 rcode = module_pre_proxy(pre_proxy_type, request);
2196         }
2197         switch (rcode) {
2198         case RLM_MODULE_FAIL:
2199         case RLM_MODULE_INVALID:
2200         case RLM_MODULE_NOTFOUND:
2201         case RLM_MODULE_USERLOCK:
2202         default:
2203                 /* FIXME: debug print failed stuff */
2204                 return -1;
2205
2206         case RLM_MODULE_REJECT:
2207         case RLM_MODULE_HANDLED:
2208                 return 0;
2209
2210         /*
2211          *      Only proxy the packet if the pre-proxy code succeeded.
2212          */
2213         case RLM_MODULE_NOOP:
2214         case RLM_MODULE_OK:
2215         case RLM_MODULE_UPDATED:
2216                 break;
2217         }
2218
2219         /*
2220          *      If it's a fake request, don't send the proxy
2221          *      packet.  The outer tunnel session will take
2222          *      care of doing that.
2223          */
2224         if (request->packet->dst_port == 0) {
2225                 request->home_server = NULL;
2226                 return 1;
2227         }
2228
2229         if (request->home_server->server) {
2230                 return proxy_to_virtual_server(request);
2231         }
2232
2233         if (!proxy_request(request)) {
2234                 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2235                 return -1;
2236         }
2237
2238         return 1;
2239 }
2240 #endif
2241
2242 static void request_post_handler(REQUEST *request)
2243 {
2244         int child_state = -1;
2245         struct timeval when;
2246         VALUE_PAIR *vp;
2247
2248         if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2249             (request->parent &&
2250              (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2251                 RDEBUG2("Request %d was cancelled.", request->number);
2252 #ifdef HAVE_PTHREAD_H
2253                 request->child_pid = NO_SUCH_CHILD_PID;
2254 #endif
2255                 child_state = REQUEST_DONE;
2256                 goto cleanup;
2257         }
2258
2259         if (request->child_state != REQUEST_RUNNING) {
2260                 rad_panic("Internal sanity check failed");
2261         }
2262
2263 #ifdef WITH_COA
2264         /*
2265          *      If it's not in the request hash, it's a CoA request.
2266          *      We hope.
2267          */
2268         if (!request->in_request_hash &&
2269             request->proxy &&
2270             ((request->proxy->code == PW_COA_REQUEST) ||
2271              (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2272                 request->next_callback = NULL;
2273                 child_state = REQUEST_DONE;
2274                 goto cleanup;
2275         }
2276 #endif
2277
2278         /*
2279          *      Catch Auth-Type := Reject BEFORE proxying the packet.
2280          */
2281         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2282             (request->reply->code == 0) &&
2283             ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2284             (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2285                 request->reply->code = PW_AUTHENTICATION_REJECT;
2286         }
2287
2288 #ifdef WITH_PROXY
2289         if (request->root->proxy_requests &&
2290             !request->in_proxy_hash &&
2291             (request->reply->code == 0) &&
2292             (request->packet->dst_port != 0) &&
2293             (request->packet->code != PW_STATUS_SERVER)) {
2294                 int rcode = successfully_proxied_request(request);
2295
2296                 if (rcode == 1) return; /* request is invalid */
2297
2298                 /*
2299                  *      Failed proxying it (dead home servers, etc.)
2300                  *      Run it through Post-Proxy-Type = Fail, and
2301                  *      respond to the request.
2302                  *
2303                  *      Note that we're in a child thread here, so we
2304                  *      do NOT re-schedule the request.  Instead, we
2305                  *      do what we would have done, which is run the
2306                  *      pre-handler, a NULL request handler, and then
2307                  *      the post handler.
2308                  */
2309                 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2310                         request_pre_handler(request);
2311                 }
2312
2313                 /*
2314                  *      Else we weren't supposed to proxy it,
2315                  *      OR we proxied it internally to a virutal server.
2316                  */
2317         }
2318 #endif
2319
2320         /*
2321          *      Fake requests don't get encoded or signed.  The caller
2322          *      also requires the reply VP's, so we don't free them
2323          *      here!
2324          */
2325         if (request->packet->dst_port == 0) {
2326                 /* FIXME: RDEBUG going to the next request */
2327 #ifdef HAVE_PTHREAD_H
2328                 request->child_pid = NO_SUCH_CHILD_PID;
2329 #endif
2330                 request->child_state = REQUEST_DONE;
2331                 return;
2332         }
2333
2334 #ifdef WITH_PROXY
2335         /*
2336          *      Copy Proxy-State from the request to the reply.
2337          */
2338         vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2339         if (vp) pairadd(&request->reply->vps, vp);
2340 #endif
2341
2342         /*
2343          *      Access-Requests get delayed or cached.
2344          */
2345         switch (request->packet->code) {
2346         case PW_AUTHENTICATION_REQUEST:
2347                 gettimeofday(&request->next_when, NULL);
2348
2349                 if (request->reply->code == 0) {
2350                         /*
2351                          *      Check if the lack of response is intentional.
2352                          */
2353                         vp = pairfind(request->config_items,
2354                                       PW_RESPONSE_PACKET_TYPE);
2355                         if (!vp) {
2356                                 RDEBUG2("There was no response configured: rejecting request %d",
2357                                        request->number);
2358                                 request->reply->code = PW_AUTHENTICATION_REJECT;
2359
2360                         } else if (vp->vp_integer == 256) {
2361                                 RDEBUG2("Not responding to request %d",
2362                                        request->number);
2363
2364                                 /*
2365                                  *      Force cleanup after a long
2366                                  *      time, so that we don't
2367                                  *      re-process the packet.
2368                                  */
2369                                 request->next_when.tv_sec += request->root->max_request_time;
2370                                 request->next_callback = cleanup_delay;
2371                                 child_state = REQUEST_CLEANUP_DELAY;
2372                                 break;
2373                         } else {
2374                                 request->reply->code = vp->vp_integer;
2375
2376                         }
2377                 }
2378
2379                 /*
2380                  *      Run rejected packets through
2381                  *
2382                  *      Post-Auth-Type = Reject
2383                  */
2384                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2385                         pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2386                         vp = radius_pairmake(request, &request->config_items,
2387                                              "Post-Auth-Type", "Reject",
2388                                              T_OP_SET);
2389                         if (vp) rad_postauth(request);
2390
2391                         /*
2392                          *      If configured, delay Access-Reject packets.
2393                          *
2394                          *      If request->root->reject_delay = 0, we discover
2395                          *      that we have to send the packet now.
2396                          */
2397                         when = request->received;
2398                         when.tv_sec += request->root->reject_delay;
2399
2400                         if (timercmp(&when, &request->next_when, >)) {
2401                                 RDEBUG2("Delaying reject of request %d for %d seconds",
2402                                        request->number,
2403                                        request->root->reject_delay);
2404                                 request->next_when = when;
2405                                 request->next_callback = reject_delay;
2406 #ifdef HAVE_PTHREAD_H
2407                                 request->child_pid = NO_SUCH_CHILD_PID;
2408 #endif
2409                                 request->child_state = REQUEST_REJECT_DELAY;
2410                                 return;
2411                         }
2412                 }
2413
2414 #ifdef WITH_COA
2415         case PW_COA_REQUEST:
2416         case PW_DISCONNECT_REQUEST:
2417 #endif
2418                 request->next_when.tv_sec += request->root->cleanup_delay;
2419                 request->next_callback = cleanup_delay;
2420                 child_state = REQUEST_CLEANUP_DELAY;
2421                 break;
2422
2423         case PW_ACCOUNTING_REQUEST:
2424                 request->next_callback = NULL; /* just to be safe */
2425                 child_state = REQUEST_DONE;
2426                 break;
2427
2428                 /*
2429                  *      FIXME: Status-Server should probably not be
2430                  *      handled here...
2431                  */
2432         case PW_STATUS_SERVER:
2433                 request->next_callback = NULL;
2434                 child_state = REQUEST_DONE;
2435                 break;
2436
2437         default:
2438                 /*
2439                  *      DHCP, VMPS, etc.
2440                  */
2441                 request->next_callback = NULL;
2442                 child_state = REQUEST_DONE;
2443                 break;
2444         }
2445
2446         /*
2447          *      Suppress "no reply" packets here, unless we're reading
2448          *      from the "detail" file.  In that case, we've got to
2449          *      tell the detail file handler that the request is dead,
2450          *      and it should re-send it.
2451          *      If configured, encode, sign, and send.
2452          */
2453         if ((request->reply->code != 0) ||
2454             (request->listener->type == RAD_LISTEN_DETAIL)) {
2455                 DEBUG_PACKET(request, request->reply, 1);
2456                 request->listener->send(request->listener, request);
2457         }
2458
2459 #ifdef WITH_COA
2460         /*
2461          *      Now that we've completely processed the request,
2462          *      see if we need to originate a CoA request.
2463          */
2464         if (request->coa ||
2465             (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2466                 if (!originated_coa_request(request)) {
2467                         RDEBUG2("Do CoA Fail handler here");
2468                 }
2469                 /* request->coa is stil set, so we can update events */
2470         }
2471 #endif
2472
2473  cleanup:
2474         /*
2475          *      Clean up.  These are no longer needed.
2476          */
2477         pairfree(&request->config_items);
2478
2479         pairfree(&request->packet->vps);
2480         request->username = NULL;
2481         request->password = NULL;
2482
2483         pairfree(&request->reply->vps);
2484
2485 #ifdef WITH_PROXY
2486         if (request->proxy) {
2487                 pairfree(&request->proxy->vps);
2488
2489                 if (request->proxy_reply) {
2490                         pairfree(&request->proxy_reply->vps);
2491                 }
2492
2493 #if 0
2494                 /*
2495                  *      We're not tracking responses from the home
2496                  *      server, we can therefore free this memory in
2497                  *      the child thread.
2498                  */
2499                 if (!request->in_proxy_hash) {
2500                         rad_free(&request->proxy);
2501                         rad_free(&request->proxy_reply);
2502                         request->home_server = NULL;
2503                 }
2504 #endif
2505         }
2506 #endif
2507
2508         RDEBUG2("Finished request %d.", request->number);
2509         rad_assert(child_state >= 0);
2510         request->child_state = child_state;
2511
2512         /*
2513          *      Single threaded mode: update timers now.
2514          */
2515         if (!have_children) wait_a_bit(request);
2516 }
2517
2518
2519 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2520 {
2521 #ifdef WITH_PROXY
2522         char buffer[128];
2523 #endif
2524
2525         RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2526         RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2527
2528         switch (request->child_state) {
2529         case REQUEST_QUEUED:
2530         case REQUEST_RUNNING:
2531 #ifdef WITH_PROXY
2532         discard:
2533 #endif
2534                 radlog(L_ERR, "Discarding duplicate request from "
2535                        "client %s port %d - ID: %d due to unfinished request %d",
2536                        client->shortname,
2537                        request->packet->src_port,request->packet->id,
2538                        request->number);
2539                 break;
2540
2541 #ifdef WITH_PROXY
2542         case REQUEST_PROXIED:
2543                 /*
2544                  *      We're not supposed to have duplicate
2545                  *      accounting packets.  The other states handle
2546                  *      duplicates fine (discard, or send duplicate
2547                  *      reply).  But we do NOT want to retransmit an
2548                  *      accounting request here, because that would
2549                  *      involve updating the Acct-Delay-Time, and
2550                  *      therefore changing the packet Id, etc.
2551                  *
2552                  *      Instead, we just discard the packet.  We may
2553                  *      eventually respond, or the client will send a
2554                  *      new accounting packet.
2555                  *
2556                  *      The same comments go for Status-Server, and
2557                  *      other packet types.
2558                  *
2559                  *      FIXME: coa: when we proxy CoA && Disconnect
2560                  *      packets, this logic has to be fixed.
2561                  */
2562                 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2563                         goto discard;
2564                 }
2565
2566                 check_for_zombie_home_server(request);
2567
2568                 /*
2569                  *      If we've just discovered that the home server
2570                  *      is dead, OR the socket has been closed, look for
2571                  *      another connection to a home server.
2572                  */
2573                 if (((request->packet->dst_port != 0) &&
2574                      (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2575                     (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2576                         home_server *home;
2577
2578                         remove_from_proxy_hash(request);
2579
2580                         home = home_server_ldb(NULL, request->home_pool, request);
2581                         if (!home) {
2582                                 RDEBUG2("Failed to find live home server for request %d", request->number);
2583                         no_home_servers:
2584                                 /*
2585                                  *      Do post-request processing,
2586                                  *      and any insertion of necessary
2587                                  *      events.
2588                                  */
2589                                 post_proxy_fail_handler(request);
2590                                 return;
2591                         }
2592
2593                         request->proxy->code = request->packet->code;
2594
2595                         /*
2596                          *      Free the old packet, to force re-encoding
2597                          */
2598                         free(request->proxy->data);
2599                         request->proxy->data = NULL;
2600                         request->proxy->data_len = 0;
2601
2602                         /*
2603                          *      This request failed over to a virtual
2604                          *      server.  Push it back onto the queue
2605                          *      to be processed.
2606                          */
2607                         if (request->home_server->server) {
2608                                 proxy_fallback_handler(request);
2609                                 return;
2610                         }
2611
2612                         /*
2613                          *      Try to proxy the request.
2614                          */
2615                         if (!proxy_request(request)) {
2616                                 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2617                                 goto no_home_servers;
2618                         }
2619
2620                         /*
2621                          *      This code executes in the main server
2622                          *      thread, so there's no need for locking.
2623                          */
2624                         rad_assert(request->next_callback != NULL);
2625                         INSERT_EVENT(request->next_callback, request);
2626                         request->next_callback = NULL;
2627                         return;
2628                 } /* else the home server is still alive */
2629
2630                 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2631                        inet_ntop(request->proxy->dst_ipaddr.af,
2632                                  &request->proxy->dst_ipaddr.ipaddr,
2633                                  buffer, sizeof(buffer)),
2634                        request->proxy->dst_port,
2635                        request->proxy->id);
2636                 request->num_proxied_requests++;
2637
2638                 DEBUG_PACKET(request, request->proxy, 1);
2639                 request->proxy_listener->send(request->proxy_listener,
2640                                               request);
2641                 break;
2642 #endif
2643
2644         case REQUEST_REJECT_DELAY:
2645                 RDEBUG2("Waiting to send Access-Reject "
2646                        "to client %s port %d - ID: %d",
2647                        client->shortname,
2648                        request->packet->src_port, request->packet->id);
2649                 break;
2650
2651         case REQUEST_CLEANUP_DELAY:
2652         case REQUEST_DONE:
2653                 if (request->reply->code == 0) {
2654                         RDEBUG2("Ignoring retransmit from client %s port %d "
2655                                 "- ID: %d, no reply was configured",
2656                                 client->shortname,
2657                                 request->packet->src_port, request->packet->id);
2658                         return;
2659                 }
2660
2661                 /*
2662                  *      FIXME: This sends duplicate replies to
2663                  *      accounting requests, even if Acct-Delay-Time
2664                  *      or Event-Timestamp is in the packet.  In those
2665                  *      cases, the Id should be changed, and the packet
2666                  *      re-calculated.
2667                  */
2668                 RDEBUG2("Sending duplicate reply "
2669                        "to client %s port %d - ID: %d",
2670                        client->shortname,
2671                        request->packet->src_port, request->packet->id);
2672                 DEBUG_PACKET(request, request->reply, 1);
2673                 request->listener->send(request->listener, request);
2674                 break;
2675         }
2676 }
2677
2678
2679 static void received_conflicting_request(REQUEST *request,
2680                                          const RADCLIENT *client)
2681 {
2682         radlog(L_ERR, "Received conflicting packet from "
2683                "client %s port %d - ID: %d due to unfinished request %d.  Giving up on old request.",
2684                client->shortname,
2685                request->packet->src_port, request->packet->id,
2686                request->number);
2687
2688         /*
2689          *      Nuke it from the request hash, so we can receive new
2690          *      packets.
2691          */
2692         remove_from_request_hash(request);
2693
2694         switch (request->child_state) {
2695 #ifdef HAVE_PTHREAD_H
2696                 /*
2697                  *      It's queued or running.  Tell it to stop, and
2698                  *      wait for it to do so.
2699                  */
2700         case REQUEST_QUEUED:
2701         case REQUEST_RUNNING:
2702                 request->master_state = REQUEST_STOP_PROCESSING;
2703                 request->delay += request->delay >> 1;
2704
2705                 tv_add(&request->when, request->delay);
2706
2707                 INSERT_EVENT(wait_for_child_to_die, request);
2708                 return;
2709 #endif
2710
2711                 /*
2712                  *      Catch race conditions.  It may have switched
2713                  *      from running to done while this code is being
2714                  *      executed.
2715                  */
2716         case REQUEST_REJECT_DELAY:
2717         case REQUEST_CLEANUP_DELAY:
2718         case REQUEST_DONE:
2719                 break;
2720
2721                 /*
2722                  *      It's in some other state, and therefore also
2723                  *      in the event queue.  At some point, the
2724                  *      child will notice, and we can then delete it.
2725                  */
2726         case REQUEST_PROXIED:
2727         default:
2728                 rad_assert(request->ev != NULL);
2729                 break;
2730         }
2731 }
2732
2733
2734 static int can_handle_new_request(RADIUS_PACKET *packet,
2735                                   RADCLIENT *client,
2736                                   struct main_config_t *root)
2737 {
2738         /*
2739          *      Count the total number of requests, to see if
2740          *      there are too many.  If so, return with an
2741          *      error.
2742          */
2743         if (root->max_requests) {
2744                 int request_count = fr_packet_list_num_elements(pl);
2745
2746                 /*
2747                  *      This is a new request.  Let's see if
2748                  *      it makes us go over our configured
2749                  *      bounds.
2750                  */
2751                 if (request_count > root->max_requests) {
2752                         radlog(L_ERR, "Dropping request (%d is too many): "
2753                                "from client %s port %d - ID: %d", request_count,
2754                                client->shortname,
2755                                packet->src_port, packet->id);
2756                         radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2757                                "\tThe value for 'max_requests' is probably set too low.\n");
2758                         return 0;
2759                 } /* else there were a small number of requests */
2760         } /* else there was no configured limit for requests */
2761
2762         /*
2763          *      FIXME: Add per-client checks.  If one client is sending
2764          *      too many packets, start discarding them.
2765          *
2766          *      We increment the counters here, and decrement them
2767          *      when the response is sent... somewhere in this file.
2768          */
2769
2770         /*
2771          *      FUTURE: Add checks for system load.  If the system is
2772          *      busy, start dropping requests...
2773          *
2774          *      We can probably keep some statistics ourselves...  if
2775          *      there are more requests coming in than we can handle,
2776          *      start dropping some.
2777          */
2778
2779         return 1;
2780 }
2781
2782
2783 int received_request(rad_listen_t *listener,
2784                      RADIUS_PACKET *packet, REQUEST **prequest,
2785                      RADCLIENT *client)
2786 {
2787         RADIUS_PACKET **packet_p;
2788         REQUEST *request = NULL;
2789         struct main_config_t *root = &mainconfig;
2790
2791         packet_p = fr_packet_list_find(pl, packet);
2792         if (packet_p) {
2793                 request = fr_packet2myptr(REQUEST, packet, packet_p);
2794                 rad_assert(request->in_request_hash);
2795
2796                 if ((request->packet->data_len == packet->data_len) &&
2797                     (memcmp(request->packet->vector, packet->vector,
2798                             sizeof(packet->vector)) == 0)) {
2799                         received_retransmit(request, client);
2800                         return 0;
2801                 }
2802
2803                 /*
2804                  *      The new request is different from the old one,
2805                  *      but maybe the old is finished.  If so, delete
2806                  *      the old one.
2807                  */
2808                 switch (request->child_state) {
2809                         struct timeval when;
2810
2811                 default:
2812                         /*
2813                          *      Special hacks for race conditions.
2814                          *      The reply is encoded, and therefore
2815                          *      likely sent.  We received a *new*
2816                          *      packet from the client, likely before
2817                          *      the next line or two of code which
2818                          *      updated the child state.  In this
2819                          *      case, just accept the new request.
2820                          */
2821                         if ((request->reply->code != 0) &&
2822                             request->reply->data) {
2823                                 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2824                                        client->shortname,
2825                                        packet->src_port, packet->id,
2826                                        request->number);
2827                                 remove_from_request_hash(request);
2828                                 request = NULL;
2829                                 break;
2830                         }
2831
2832                         gettimeofday(&when, NULL);
2833                         when.tv_sec -= 1;
2834
2835                         /*
2836                          *      If the cached request was received
2837                          *      within the last second, then we
2838                          *      discard the NEW request instead of the
2839                          *      old one.  This will happen ONLY when
2840                          *      the client is severely broken, and is
2841                          *      sending conflicting packets very
2842                          *      quickly.
2843                          */
2844                         if (timercmp(&when, &request->received, <)) {
2845                                 radlog(L_ERR, "Discarding conflicting packet from "
2846                                        "client %s port %d - ID: %d due to recent request %d.",
2847                                        client->shortname,
2848                                        packet->src_port, packet->id,
2849                                        request->number);
2850                                 return 0;
2851                         }
2852
2853                         received_conflicting_request(request, client);
2854                         request = NULL;
2855                         break;
2856
2857                 case REQUEST_REJECT_DELAY:
2858                 case REQUEST_CLEANUP_DELAY:
2859                         request->child_state = REQUEST_DONE;
2860                 case REQUEST_DONE:
2861                         cleanup_delay(request);
2862                         request = NULL;
2863                         break;
2864                 }
2865         }
2866
2867         /*
2868          *      We may want to quench the new request.
2869          */
2870         if ((listener->type != RAD_LISTEN_DETAIL) &&
2871             !can_handle_new_request(packet, client, root)) {
2872                 return 0;
2873         }
2874
2875         /*
2876          *      Create and initialize the new request.
2877          */
2878         request = request_alloc(); /* never fails */
2879
2880         if ((request->reply = rad_alloc(0)) == NULL) {
2881                 radlog(L_ERR, "No memory");
2882                 exit(1);
2883         }
2884
2885         request->listener = listener;
2886         request->client = client;
2887         request->packet = packet;
2888         request->packet->timestamp = request->timestamp;
2889         request->number = request_num_counter++;
2890         request->priority = listener->type;
2891 #ifdef HAVE_PTHREAD_H
2892         request->child_pid = NO_SUCH_CHILD_PID;
2893 #endif
2894
2895         /*
2896          *      Status-Server packets go to the head of the queue.
2897          */
2898         if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2899
2900         /*
2901          *      Set virtual server identity
2902          */
2903         if (client->server) {
2904                 request->server = client->server;
2905         } else if (listener->server) {
2906                 request->server = listener->server;
2907         } else {
2908                 request->server = NULL;
2909         }
2910
2911         /*
2912          *      Remember the request in the list.
2913          */
2914         if (!fr_packet_list_insert(pl, &request->packet)) {
2915                 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2916                 ev_request_free(&request);
2917                 return 0;
2918         }
2919
2920         request->in_request_hash = TRUE;
2921         request->root = root;
2922         root->refcount++;
2923 #ifdef WITH_TCP
2924         request->listener->count++;
2925 #endif
2926
2927         /*
2928          *      The request passes many of our sanity checks.
2929          *      From here on in, if anything goes wrong, we
2930          *      send a reject message, instead of dropping the
2931          *      packet.
2932          */
2933
2934         /*
2935          *      Build the reply template from the request.
2936          */
2937
2938         request->reply->sockfd = request->packet->sockfd;
2939         request->reply->dst_ipaddr = request->packet->src_ipaddr;
2940         request->reply->src_ipaddr = request->packet->dst_ipaddr;
2941         request->reply->dst_port = request->packet->src_port;
2942         request->reply->src_port = request->packet->dst_port;
2943         request->reply->id = request->packet->id;
2944         request->reply->code = 0; /* UNKNOWN code */
2945         memcpy(request->reply->vector, request->packet->vector,
2946                sizeof(request->reply->vector));
2947         request->reply->vps = NULL;
2948         request->reply->data = NULL;
2949         request->reply->data_len = 0;
2950
2951         request->master_state = REQUEST_ACTIVE;
2952         request->child_state = REQUEST_QUEUED;
2953         request->next_callback = NULL;
2954
2955         gettimeofday(&request->received, NULL);
2956         request->timestamp = request->received.tv_sec;
2957         request->when = request->received;
2958
2959         request->delay = USEC;
2960
2961         tv_add(&request->when, request->delay);
2962
2963         INSERT_EVENT(wait_a_bit, request);
2964
2965         *prequest = request;
2966         return 1;
2967 }
2968
2969
2970 #ifdef WITH_PROXY
2971 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2972 {
2973         char            buffer[128];
2974         REQUEST         *request;
2975
2976         /*
2977          *      Also removes from the proxy hash if responses == requests
2978          */
2979         request = lookup_in_proxy_hash(packet);
2980
2981         if (!request) {
2982                 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2983                        inet_ntop(packet->src_ipaddr.af,
2984                                  &packet->src_ipaddr.ipaddr,
2985                                  buffer, sizeof(buffer)),
2986                        packet->src_port, packet->id);
2987                 return NULL;
2988         }
2989
2990         /*
2991          *      We haven't replied to the NAS, but we have seen an
2992          *      earlier reply from the home server.  Ignore this packet,
2993          *      as we're likely still processing the previous reply.
2994          */
2995         if (request->proxy_reply) {
2996                 if (memcmp(request->proxy_reply->vector,
2997                            packet->vector,
2998                            sizeof(request->proxy_reply->vector)) == 0) {
2999                         RDEBUG2("Discarding duplicate reply from host %s port %d  - ID: %d for request %d",
3000                                inet_ntop(packet->src_ipaddr.af,
3001                                          &packet->src_ipaddr.ipaddr,
3002                                          buffer, sizeof(buffer)),
3003                                packet->src_port, packet->id,
3004                                request->number);
3005                 } else {
3006                         /*
3007                          *      ? The home server gave us a new proxy
3008                          *      reply which doesn't match the old
3009                          *      one.  Delete it.
3010                          */
3011                         RDEBUG2("Ignoring conflicting proxy reply");
3012                 }
3013
3014                 /* assert that there's an event queued for request? */
3015                 return NULL;
3016         }
3017
3018         /*
3019          *      Verify the packet before doing ANYTHING with it.  This
3020          *      means we're doing more MD5 checks in the server core.
3021          *      However, we can fix that by moving to multiple threads
3022          *      listening on sockets.
3023          *
3024          *      We do this AFTER looking the request up in the hash,
3025          *      and AFTER vhecking if we saw a previous request.  This
3026          *      helps minimize the DoS effect of people attacking us
3027          *      with spoofed packets.
3028          */
3029         if (rad_verify(packet, request->proxy,
3030                        request->home_server->secret) != 0) {
3031                 DEBUG("Ignoring spoofed proxy reply.  Signature is invalid");
3032                 return NULL;
3033         }
3034
3035         gettimeofday(&now, NULL);
3036
3037         /*
3038          *      Maybe move this earlier in the decision process?
3039          *      Having it here means that late or duplicate proxy
3040          *      replies no longer get the home server marked as
3041          *      "alive".  This might be good for stability, though.
3042          *
3043          *      FIXME: Do we really want to do this whenever we
3044          *      receive a packet?  Setting this here means that we
3045          *      mark it alive on *any* packet, even if it's lost all
3046          *      of the *other* packets in the last 10s.
3047          */
3048         request->home_server->state = HOME_STATE_ALIVE;
3049
3050 #ifdef WITH_COA
3051         /*
3052          *      When originating CoA, the "proxy" reply is the reply
3053          *      to the CoA request that we originated.  At this point,
3054          *      the original request is finished, and it has a reply.
3055          *
3056          *      However, if we haven't separated the two requests, do
3057          *      so now.  This is done so that cleaning up the original
3058          *      request won't cause the CoA request to be free'd.  See
3059          *      util.c, request_free()
3060          */
3061         if (request->parent && (request->parent->coa == request)) {
3062                 request->parent->coa = NULL;
3063                 request->parent = NULL;
3064
3065         } else
3066                 /*
3067                  *      Skip the next set of checks, as the original
3068                  *      reply is cached.  We want to be able to still
3069                  *      process the CoA reply, AND to reference the
3070                  *      original request/reply.
3071                  *
3072                  *      This is getting to be really quite a bit of a
3073                  *      hack.
3074                  */
3075 #endif
3076
3077         /*
3078          *      If there's a reply to the NAS, ignore everything
3079          *      related to proxy responses
3080          */
3081         if (request->reply && request->reply->code != 0) {
3082                 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3083                 return NULL;
3084         }
3085
3086 #ifdef WITH_STATS
3087         /*
3088          *      The average includes our time to receive packets and
3089          *      look them up in the hashes, which should be the same
3090          *      for all packets.
3091          *
3092          *      We update the response time only for the FIRST packet
3093          *      we receive.
3094          */
3095         if (request->home_server->ema.window > 0) {
3096                 radius_stats_ema(&request->home_server->ema,
3097                                  &now, &request->proxy_when);
3098         }
3099 #endif
3100
3101         switch (request->child_state) {
3102         case REQUEST_QUEUED:
3103         case REQUEST_RUNNING:
3104                 radlog(L_ERR, "Internal sanity check failed for child state");
3105                 /* FALL-THROUGH */
3106
3107         case REQUEST_REJECT_DELAY:
3108         case REQUEST_CLEANUP_DELAY:
3109         case REQUEST_DONE:
3110                 radlog(L_ERR, "Reply from home server %s port %d  - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3111                        inet_ntop(packet->src_ipaddr.af,
3112                                  &packet->src_ipaddr.ipaddr,
3113                                  buffer, sizeof(buffer)),
3114                        packet->src_port, packet->id,
3115                        request->number);
3116                 /* assert that there's an event queued for request? */
3117                 return NULL;
3118
3119         case REQUEST_PROXIED:
3120                 break;
3121         }
3122
3123         request->proxy_reply = packet;
3124
3125 #if 0
3126         /*
3127          *      Perform RTT calculations, as per RFC 2988 (for TCP).
3128          *      Note that we only do so on the first response.
3129          */
3130         if ((request->num_proxied_responses == 1)
3131                 int rtt;
3132                 home_server *home = request->home_server;
3133
3134                 rtt = now.tv_sec - request->proxy_when.tv_sec;
3135                 rtt *= USEC;
3136                 rtt += now.tv_usec;
3137                 rtt -= request->proxy_when.tv_usec;
3138
3139                 if (!home->has_rtt) {
3140                         home->has_rtt = TRUE;
3141
3142                         home->srtt = rtt;
3143                         home->rttvar = rtt / 2;
3144
3145                 } else {
3146                         home->rttvar -= home->rttvar >> 2;
3147                         home->rttvar += (home->srtt - rtt);
3148                         home->srtt -= home->srtt >> 3;
3149                         home->srtt += rtt >> 3;
3150                 }
3151
3152                 home->rto = home->srtt;
3153                 if (home->rttvar > (USEC / 4)) {
3154                         home->rto += home->rttvar * 4;
3155                 } else {
3156                         home->rto += USEC;
3157                 }
3158         }
3159 #endif
3160
3161         /*
3162          *      There's no incoming request, so it's a proxied packet
3163          *      we originated.
3164          */
3165         if (!request->packet) {
3166                 received_response_to_ping(request);
3167                 request->proxy_reply = NULL; /* caller will free it */
3168                 ev_request_free(&request);
3169                 return NULL;
3170         }
3171
3172         request->child_state = REQUEST_QUEUED;
3173         request->when = now;
3174         request->delay = USEC;
3175         request->priority = RAD_LISTEN_PROXY;
3176         tv_add(&request->when, request->delay);
3177
3178         /*
3179          *      Wait a bit will take care of max_request_time
3180          */
3181         INSERT_EVENT(wait_a_bit, request);
3182
3183         return request;
3184 }
3185 #endif
3186
3187 void event_new_fd(rad_listen_t *this)
3188 {
3189         char buffer[1024];
3190
3191         if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3192
3193         this->print(this, buffer, sizeof(buffer));
3194
3195         if (this->status == RAD_LISTEN_STATUS_INIT) {
3196                 if (just_started) {
3197                         DEBUG("Listening on %s", buffer);
3198                 } else {
3199                         DEBUG2(" ... adding new socket %s", buffer);
3200                 }
3201                 if (!fr_event_fd_insert(el, 0, this->fd,
3202                                         event_socket_handler, this)) {
3203                         radlog(L_ERR, "Failed remembering handle for proxy socket!");
3204                         exit(1);
3205                 }
3206
3207                 this->status = RAD_LISTEN_STATUS_KNOWN;
3208                 return;
3209         }
3210
3211         if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3212                 DEBUG2(" ... closing socket %s", buffer);
3213
3214                 fr_event_fd_delete(el, 0, this->fd);
3215                 this->status = RAD_LISTEN_STATUS_FINISH;
3216
3217                 /*
3218                  *      Close the fd AFTER fixing up the requests and
3219                  *      listeners, so that they don't send/recv on the
3220                  *      wrong socket (if someone manages to open
3221                  *      another one).
3222                  */
3223                 close(this->fd);
3224                 this->fd = -1;
3225         }
3226 }
3227
3228 static void handle_signal_self(int flag)
3229 {
3230         if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3231                 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3232                         fr_event_loop_exit(el, 1);
3233                 } else {
3234                         fr_event_loop_exit(el, 2);
3235                 }
3236
3237                 return;
3238         } /* else exit/term flags weren't set */
3239
3240         /*
3241          *      Tell the even loop to stop processing.
3242          */
3243         if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3244                 time_t when;
3245                 static time_t last_hup = 0;
3246
3247                 DEBUG("Received HUP signal.");
3248
3249                 when = time(NULL);
3250                 if ((int) (when - last_hup) < 5) {
3251                         radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3252                         return;
3253                 }
3254                 last_hup = when;
3255
3256                 fr_event_loop_exit(el, 0x80);
3257         }
3258
3259 #ifdef WITH_DETAIL
3260         if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3261                 rad_listen_t *this;
3262
3263                 /*
3264                  *      FIXME: O(N) loops suck.
3265                  */
3266                 for (this = mainconfig.listen;
3267                      this != NULL;
3268                      this = this->next) {
3269                         if (this->type != RAD_LISTEN_DETAIL) continue;
3270
3271                         /*
3272                          *      This one didn't send the signal, skip
3273                          *      it.
3274                          */
3275                         if (!this->decode(this, NULL)) continue;
3276
3277                         /*
3278                          *      Go service the interrupt.
3279                          */
3280                         event_poll_detail(this);
3281                 }
3282         }
3283 #endif
3284
3285         if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3286                 rad_listen_t *this;
3287
3288                 for (this = mainconfig.listen;
3289                      this != NULL;
3290                      this = this->next) {
3291                         event_new_fd(this);
3292                 }
3293         }
3294 }
3295
3296 #ifndef WITH_SELF_PIPE
3297 void radius_signal_self(int flag)
3298 {
3299         handle_signal_self(flag);
3300 }
3301 #else
3302 /*
3303  *      Inform ourselves that we received a signal.
3304  */
3305 void radius_signal_self(int flag)
3306 {
3307         ssize_t rcode;
3308         uint8_t buffer[16];
3309
3310         /*
3311          *      The read MUST be non-blocking for this to work.
3312          */
3313         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3314         if (rcode > 0) {
3315                 ssize_t i;
3316
3317                 for (i = 0; i < rcode; i++) {
3318                         buffer[0] |= buffer[i];
3319                 }
3320         } else {
3321                 buffer[0] = 0;
3322         }
3323
3324         buffer[0] |= flag;
3325
3326         write(self_pipe[1], buffer, 1);
3327 }
3328
3329
3330 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3331                                  UNUSED int fd, UNUSED void *ctx)
3332 {
3333         ssize_t i, rcode;
3334         uint8_t buffer[32];
3335
3336         rcode = read(self_pipe[0], buffer, sizeof(buffer));
3337         if (rcode <= 0) return;
3338
3339         /*
3340          *      Merge pending signals.
3341          */
3342         for (i = 0; i < rcode; i++) {
3343                 buffer[0] |= buffer[i];
3344         }
3345
3346         handle_signal_self(buffer[0]);
3347 }
3348 #endif
3349
3350
3351 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3352                                  void *ctx)
3353 {
3354         rad_listen_t *listener = ctx;
3355         RAD_REQUEST_FUNP fun;
3356         REQUEST *request;
3357
3358         rad_assert(xel == el);
3359
3360         xel = xel;
3361
3362         if (listener->fd < 0) rad_panic("Socket was closed on us!");
3363
3364         if (!listener->recv(listener, &fun, &request)) return;
3365
3366         if (!thread_pool_addrequest(request, fun)) {
3367                 request->child_state = REQUEST_DONE;
3368         }
3369 }
3370
3371 typedef struct listen_detail_t {
3372         fr_event_t      *ev;
3373 } listen_detail_t;
3374
3375 /*
3376  *      This function is called periodically to see if this detail
3377  *      file is available for reading.
3378  */
3379 static void event_poll_detail(void *ctx)
3380 {
3381         int rcode, delay;
3382         RAD_REQUEST_FUNP fun;
3383         REQUEST *request;
3384         rad_listen_t *this = ctx;
3385         struct timeval when;
3386         listen_detail_t *detail = this->data;
3387
3388         rad_assert(this->type == RAD_LISTEN_DETAIL);
3389
3390         /*
3391          *      Try to read something.
3392          *
3393          *      FIXME: This does poll AND receive.
3394          */
3395         rcode = this->recv(this, &fun, &request);
3396         if (rcode != 0) {
3397                 rad_assert(fun != NULL);
3398                 rad_assert(request != NULL);
3399
3400                 if (!thread_pool_addrequest(request, fun)) {
3401                         request->child_state = REQUEST_DONE;
3402                 }
3403         }
3404
3405         if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3406         when = now;
3407
3408         /*
3409          *      Backdoor API to get the delay until the next poll
3410          *      time.
3411          */
3412         delay = this->encode(this, NULL);
3413         tv_add(&when, delay);
3414
3415         if (!fr_event_insert(el, event_poll_detail, this,
3416                              &when, &detail->ev)) {
3417                 radlog(L_ERR, "Failed creating handler");
3418                 exit(1);
3419         }
3420 }
3421
3422
3423 static void event_status(struct timeval *wake)
3424 {
3425 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3426         int argval;
3427 #endif
3428
3429         if (debug_flag == 0) {
3430                 if (just_started) {
3431                         radlog(L_INFO, "Ready to process requests.");
3432                         just_started = FALSE;
3433                 }
3434                 return;
3435         }
3436
3437         if (!wake) {
3438                 DEBUG("Ready to process requests.");
3439
3440         } else if ((wake->tv_sec != 0) ||
3441                    (wake->tv_usec >= 100000)) {
3442                 DEBUG("Waking up in %d.%01u seconds.",
3443                       (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3444         }
3445
3446
3447         /*
3448          *      FIXME: Put this somewhere else, where it isn't called
3449          *      all of the time...
3450          */
3451
3452 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3453         /*
3454          *      If there are no child threads, then there may
3455          *      be child processes.  In that case, wait for
3456          *      their exit status, and throw that exit status
3457          *      away.  This helps get rid of zxombie children.
3458          */
3459         while (waitpid(-1, &argval, WNOHANG) > 0) {
3460                 /* do nothing */
3461         }
3462 #endif
3463
3464 }
3465
3466 /*
3467  *      Externally-visibly functions.
3468  */
3469 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3470 {
3471         rad_listen_t *this, *head = NULL;
3472
3473         if (el) return 0;
3474
3475         time(&fr_start_time);
3476
3477         el = fr_event_list_create(event_status);
3478         if (!el) return 0;
3479
3480         pl = fr_packet_list_create(0);
3481         if (!pl) return 0;      /* leak el */
3482
3483         request_num_counter = 0;
3484
3485 #ifdef WITH_PROXY
3486         if (mainconfig.proxy_requests) {
3487                 pthread_mutexattr_t attr;
3488
3489                 /*
3490                  *      Create the tree for managing proxied requests and
3491                  *      responses.
3492                  */
3493                 proxy_list = fr_packet_list_create(1);
3494                 if (!proxy_list) return 0;
3495
3496 #ifdef HAVE_PTHREAD_H
3497                 pthread_mutexattr_init(&attr);
3498
3499 #ifdef PTHREAD_MUTEX_RECURSIVE
3500                 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3501                         radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3502                                strerror(errno));
3503                         exit(1);
3504                 }
3505 #endif
3506
3507                 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3508                         radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3509                                strerror(errno));
3510                         exit(1);
3511                 }
3512
3513                 pthread_mutexattr_destroy(&attr);
3514 #endif
3515         }
3516 #endif
3517
3518         /*
3519          *      Just before we spawn the child threads, force the log
3520          *      subsystem to re-open the log file for every write.
3521          */
3522         if (spawn_flag) force_log_reopen();
3523
3524 #ifdef HAVE_PTHREAD_H
3525 #ifndef __MINGW32__
3526         NO_SUCH_CHILD_PID = (pthread_t ) (0);
3527 #else
3528         NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3529 #endif
3530         /*
3531          *      Initialize the threads ONLY if we're spawning, AND
3532          *      we're running normally.
3533          */
3534         if (spawn_flag && !check_config &&
3535             (thread_pool_init(cs, &spawn_flag) < 0)) {
3536                 exit(1);
3537         }
3538 #endif
3539
3540         /*
3541          *      Move all of the thread calls to this file?
3542          *
3543          *      It may be best for the mutexes to be in this file...
3544          */
3545         have_children = spawn_flag;
3546
3547         if (check_config) {
3548                 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3549                        mainconfig.name);
3550                 return 1;
3551         }
3552
3553 #ifdef WITH_SELF_PIPE
3554         /*
3555          *      Child threads need a pipe to signal us, as do the
3556          *      signal handlers.
3557          */
3558         if (pipe(self_pipe) < 0) {
3559                 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3560                        strerror(errno));
3561                 exit(1);
3562         }
3563         if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3564                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3565                        strerror(errno));
3566                 exit(1);
3567         }
3568         if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3569                 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3570                        strerror(errno));
3571                 exit(1);
3572         }
3573
3574         if (!fr_event_fd_insert(el, 0, self_pipe[0],
3575                                   event_signal_handler, el)) {
3576                 radlog(L_ERR, "Failed creating handler for signals");
3577                 exit(1);
3578         }
3579 #endif  /* WITH_SELF_PIPE */
3580
3581 #ifdef WITH_PROXY
3582         /*
3583          *      Mark the proxy Fd's as unused.
3584          */
3585         {
3586                 int i;
3587
3588                 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3589         }
3590 #endif
3591
3592        DEBUG("%s: #### Opening IP addresses and Ports ####",
3593                mainconfig.name);
3594
3595        /*
3596         *       The server temporarily switches to an unprivileged
3597         *       user very early in the bootstrapping process.
3598         *       However, some sockets MAY require privileged access
3599         *       (bind to device, or to port < 1024, or to raw
3600         *       sockets).  Those sockets need to call suid up/down
3601         *       themselves around the functions that need a privileged
3602         *       uid.
3603         */
3604         if (listen_init(cs, &head) < 0) {
3605                 _exit(1);
3606         }
3607
3608         /*
3609          *      At this point, no one has any business *ever* going
3610          *      back to root uid.
3611          */
3612         fr_suid_down_permanent();
3613
3614         /*
3615          *      Add all of the sockets to the event loop.
3616          */
3617         for (this = head;
3618              this != NULL;
3619              this = this->next) {
3620                 char buffer[256];
3621
3622                 this->print(this, buffer, sizeof(buffer));
3623
3624                 switch (this->type) {
3625 #ifdef WITH_DETAIL
3626                 case RAD_LISTEN_DETAIL:
3627                         DEBUG("Listening on %s", buffer);
3628
3629                         /*
3630                          *      Detail files are always known, and aren't
3631                          *      put into the socket event loop.
3632                          */
3633                         this->status = RAD_LISTEN_STATUS_KNOWN;
3634
3635                         /*
3636                          *      Set up the first poll interval.
3637                          */
3638                         event_poll_detail(this);
3639                         break;
3640 #endif
3641
3642 #ifdef WITH_PROXY
3643                 case RAD_LISTEN_PROXY:
3644                         rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3645                         rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3646
3647                         proxy_fds[this->fd & 0x1f] = this->fd;
3648                         proxy_listeners[this->fd & 0x1f] = this;
3649                         if (!fr_packet_list_socket_add(proxy_list,
3650                                                          this->fd)) {
3651                                 rad_assert(0 == 1);
3652                         }
3653                         /* FALL-THROUGH */
3654 #endif
3655
3656                 default:
3657                         break;
3658                 }
3659
3660                 event_new_fd(this);
3661
3662                 this->status = RAD_LISTEN_STATUS_KNOWN;
3663         }
3664
3665         mainconfig.listen = head;
3666
3667         return 1;
3668 }
3669
3670
3671 static int request_hash_cb(UNUSED void *ctx, void *data)
3672 {
3673         REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3674
3675 #ifdef WITH_PROXY
3676         rad_assert(request->in_proxy_hash == FALSE);
3677 #endif
3678
3679         ev_request_free(&request);
3680
3681         return 0;
3682 }
3683
3684
3685 #ifdef WITH_PROXY
3686 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3687 {
3688         REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3689
3690         ev_request_free(&request);
3691
3692         return 0;
3693 }
3694 #endif
3695
3696 void radius_event_free(void)
3697 {
3698         /*
3699          *      FIXME: Stop all threads, or at least check that
3700          *      they're all waiting on the semaphore, and the queues
3701          *      are empty.
3702          */
3703
3704 #ifdef WITH_PROXY
3705         /*
3706          *      There are requests in the proxy hash that aren't
3707          *      referenced from anywhere else.  Remove them first.
3708          */
3709         if (proxy_list) {
3710                 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3711                 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3712                 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3713                 fr_packet_list_free(proxy_list);
3714                 proxy_list = NULL;
3715         }
3716 #endif
3717
3718         fr_packet_list_walk(pl, NULL, request_hash_cb);
3719
3720         fr_packet_list_free(pl);
3721         pl = NULL;
3722
3723         fr_event_list_free(el);
3724 }
3725
3726 int radius_event_process(void)
3727 {
3728         if (!el) return 0;
3729
3730         return fr_event_loop(el);
3731 }
3732
3733 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3734 {
3735         request->options = RAD_REQUEST_OPTION_DEBUG2;
3736
3737         if (request_pre_handler(request)) {
3738                 rad_assert(fun != NULL);
3739                 rad_assert(request != NULL);
3740
3741                 if (request->server) RDEBUG("server %s {",
3742                                             request->server != NULL ?
3743                                             request->server : "");
3744                 fun(request);
3745
3746                 if (request->server) RDEBUG("} # server %s",
3747                                              request->server != NULL ?
3748                                             request->server : "");
3749
3750                 request_post_handler(request);
3751         }
3752
3753         DEBUG2("Going to the next request");
3754         return;
3755 }