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