src/main/realms.c

   1 /*
   2  * realms.c     Realm handling code
   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/rad_assert.h>
  29
  30 #include <sys/stat.h>
  31
  32 #include <ctype.h>
  33 #include <fcntl.h>
  34
  35 #ifdef HAVE_PCREPOSIX_H
  36 #include <pcreposix.h>
  37 #else
  38 #ifdef HAVE_REGEX_H
  39 #include <regex.h>
  40
  41 /*
  42  *  For POSIX Regular expressions.
  43  *  (0) Means no extended regular expressions.
  44  *  REG_EXTENDED means use extended regular expressions.
  45  */
  46 #ifndef REG_EXTENDED
  47 #define REG_EXTENDED (0)
  48 #endif
  49
  50 #ifndef REG_NOSUB
  51 #define REG_NOSUB (0)
  52 #endif
  53
  54 #ifndef REG_ICASE
  55 #define REG_ICASE (0)
  56 #endif
  57 #endif
  58 #endif
  59
  60 static rbtree_t *realms_byname = NULL;
  61
  62 #ifdef HAVE_REGEX_H
  63 typedef struct realm_regex_t {
  64         REALM   *realm;
  65         struct realm_regex_t *next;
  66 } realm_regex_t;
  67
  68 static realm_regex_t *realms_regex = NULL;
  69
  70 #endif /* HAVE_REGEX_H */
  71
  72 typedef struct realm_config_t {
  73         CONF_SECTION    *cs;
  74         int             dead_time;
  75         int             retry_count;
  76         int             retry_delay;
  77         int             fallback;
  78         int             wake_all_if_all_dead;
  79 } realm_config_t;
  80
  81 static realm_config_t *realm_config = NULL;
  82
  83 #ifdef WITH_PROXY
  84 static rbtree_t *home_servers_byaddr = NULL;
  85 static rbtree_t *home_servers_byname = NULL;
  86 #ifdef WITH_STATS
  87 static int home_server_max_number = 0;
  88 static rbtree_t *home_servers_bynumber = NULL;
  89 #endif
  90
  91 static rbtree_t *home_pools_byname = NULL;
  92
  93 /*
  94  *  Map the proxy server configuration parameters to variables.
  95  */
  96 static const CONF_PARSER proxy_config[] = {
  97         { "retry_delay",  PW_TYPE_INTEGER,
  98           offsetof(realm_config_t, retry_delay),
  99           NULL, Stringify(RETRY_DELAY) },
 100
 101         { "retry_count",  PW_TYPE_INTEGER,
 102           offsetof(realm_config_t, retry_count),
 103           NULL, Stringify(RETRY_COUNT) },
 104
 105         { "default_fallback", PW_TYPE_BOOLEAN,
 106           offsetof(realm_config_t, fallback),
 107           NULL, "no" },
 108
 109         { "dead_time",    PW_TYPE_INTEGER,
 110           offsetof(realm_config_t, dead_time),
 111           NULL, Stringify(DEAD_TIME) },
 112
 113         { "wake_all_if_all_dead", PW_TYPE_BOOLEAN,
 114           offsetof(realm_config_t, wake_all_if_all_dead),
 115           NULL, "no" },
 116
 117         { NULL, -1, 0, NULL, NULL }
 118 };
 119 #endif
 120
 121 static int realm_name_cmp(const void *one, const void *two)
 122 {
 123         const REALM *a = one;
 124         const REALM *b = two;
 125
 126         return strcasecmp(a->name, b->name);
 127 }
 128
 129
 130 #ifdef WITH_PROXY
 131 static void home_server_free(void *data)
 132 {
 133         home_server *home = data;
 134
 135         free(home);
 136 }
 137
 138 static int home_server_name_cmp(const void *one, const void *two)
 139 {
 140         const home_server *a = one;
 141         const home_server *b = two;
 142
 143         if (a->type < b->type) return -1;
 144         if (a->type > b->type) return +1;
 145
 146         return strcasecmp(a->name, b->name);
 147 }
 148
 149 static int home_server_addr_cmp(const void *one, const void *two)
 150 {
 151         int rcode;
 152         const home_server *a = one;
 153         const home_server *b = two;
 154
 155         if (a->server && !b->server) return -1;
 156         if (!a->server && b->server) return +1;
 157         if (a->server && b->server) {
 158                 rcode = a->type - b->type;
 159                 if (rcode != 0) return rcode;
 160                 return strcmp(a->server, b->server);
 161         }
 162
 163         if (a->port < b->port) return -1;
 164         if (a->port > b->port) return +1;
 165
 166 #ifdef WITH_TCP
 167         if (a->proto < b->proto) return -1;
 168         if (a->proto > b->proto) return +1;
 169 #endif
 170
 171         rcode = fr_ipaddr_cmp(&a->src_ipaddr, &b->src_ipaddr);
 172         if (rcode != 0) return rcode;
 173
 174         return fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
 175 }
 176
 177 #ifdef WITH_STATS
 178 static int home_server_number_cmp(const void *one, const void *two)
 179 {
 180         const home_server *a = one;
 181         const home_server *b = two;
 182
 183         return (a->number - b->number);
 184 }
 185 #endif
 186
 187 static int home_pool_name_cmp(const void *one, const void *two)
 188 {
 189         const home_pool_t *a = one;
 190         const home_pool_t *b = two;
 191
 192         if (a->server_type < b->server_type) return -1;
 193         if (a->server_type > b->server_type) return +1;
 194
 195         return strcasecmp(a->name, b->name);
 196 }
 197
 198
 199 static size_t xlat_cs(CONF_SECTION *cs, const char *fmt, char *out, size_t outlen)
 200
 201 {
 202         const char *value = NULL;
 203
 204         /*
 205          *      Instance name
 206          */
 207         if (strcmp(fmt, "instance") == 0) {
 208                 value = cf_section_name2(cs);
 209                 if (!value) {
 210                         *out = '\0';
 211                         return 0;
 212                 }
 213         } else {
 214                 CONF_PAIR *cp;
 215
 216                 cp = cf_pair_find(cs, fmt);
 217                 if (!cp || !(value = cf_pair_value(cp))) {
 218                         *out = '\0';
 219                         return 0;
 220                 }
 221         }
 222
 223         strlcpy(out, value, outlen);
 224
 225         return strlen(out);
 226 }
 227
 228
 229 /*
 230  *      Xlat for %{home_server:foo}
 231  */
 232 static size_t xlat_home_server(UNUSED void *instance, REQUEST *request,
 233                                const char *fmt, char *out, size_t outlen)
 234 {
 235         if (!fmt || !out || (outlen < 1)) return 0;
 236
 237         if (!request || !request->home_server) {
 238                 *out = '\0';
 239                 return 0;
 240         }
 241
 242         return xlat_cs(request->home_server->cs, fmt, out, outlen);
 243 }
 244
 245
 246 /*
 247  *      Xlat for %{home_server_pool:foo}
 248  */
 249 static size_t xlat_server_pool(UNUSED void *instance, REQUEST *request,
 250                                const char *fmt, char *out, size_t outlen)
 251 {
 252         if (!fmt || !out || (outlen < 1)) return 0;
 253
 254         if (!request || !request->home_pool) {
 255                 *out = '\0';
 256                 return 0;
 257         }
 258
 259         return xlat_cs(request->home_pool->cs, fmt, out, outlen);
 260 }
 261 #endif
 262
 263 void realms_free(void)
 264 {
 265 #ifdef WITH_PROXY
 266 #ifdef WITH_STATS
 267         rbtree_free(home_servers_bynumber);
 268         home_servers_bynumber = NULL;
 269 #endif
 270
 271         rbtree_free(home_servers_byname);
 272         home_servers_byname = NULL;
 273
 274         rbtree_free(home_servers_byaddr);
 275         home_servers_byaddr = NULL;
 276
 277         rbtree_free(home_pools_byname);
 278         home_pools_byname = NULL;
 279 #endif
 280
 281         rbtree_free(realms_byname);
 282         realms_byname = NULL;
 283
 284 #ifdef HAVE_REGEX_H
 285         if (realms_regex) {
 286                 realm_regex_t *this, *next;
 287
 288                 for (this = realms_regex; this != NULL; this = next) {
 289                         next = this->next;
 290                         free(this->realm);
 291                         free(this);
 292                 }
 293                 realms_regex = NULL;
 294         }
 295 #endif
 296
 297         free(realm_config);
 298         realm_config = NULL;
 299 }
 300
 301
 302 #ifdef WITH_PROXY
 303 static CONF_PARSER limit_config[] = {
 304         { "max_connections", PW_TYPE_INTEGER,
 305           offsetof(home_server, limit.max_connections), NULL,   "16" },
 306
 307         { "max_requests", PW_TYPE_INTEGER,
 308           offsetof(home_server, limit.max_requests), NULL,   "0" },
 309
 310         { "lifetime", PW_TYPE_INTEGER,
 311           offsetof(home_server, limit.lifetime), NULL,   "0" },
 312
 313         { "idle_timeout", PW_TYPE_INTEGER,
 314           offsetof(home_server, limit.idle_timeout), NULL,   "0" },
 315
 316         { NULL, -1, 0, NULL, NULL }             /* end the list */
 317 };
 318
 319 static struct in_addr hs_ip4addr;
 320 static struct in6_addr hs_ip6addr;
 321 static char *hs_srcipaddr = NULL;
 322 static char *hs_type = NULL;
 323 static char *hs_check = NULL;
 324 static char *hs_virtual_server = NULL;
 325 #ifdef WITH_TCP
 326 static char *hs_proto = NULL;
 327 #endif
 328
 329 #ifdef WITH_COA
 330 static CONF_PARSER home_server_coa[] = {
 331         { "irt",  PW_TYPE_INTEGER,
 332           offsetof(home_server, coa_irt), 0, Stringify(2) },
 333         { "mrt",  PW_TYPE_INTEGER,
 334           offsetof(home_server, coa_mrt), 0, Stringify(16) },
 335         { "mrc",  PW_TYPE_INTEGER,
 336           offsetof(home_server, coa_mrc), 0, Stringify(5) },
 337         { "mrd",  PW_TYPE_INTEGER,
 338           offsetof(home_server, coa_mrd), 0, Stringify(30) },
 339
 340         { NULL, -1, 0, NULL, NULL }             /* end the list */
 341 };
 342 #endif
 343
 344 static CONF_PARSER home_server_config[] = {
 345         { "ipaddr",  PW_TYPE_IPADDR,
 346           0, &hs_ip4addr,  NULL },
 347         { "ipv6addr",  PW_TYPE_IPV6ADDR,
 348           0, &hs_ip6addr, NULL },
 349         { "virtual_server",  PW_TYPE_STRING_PTR,
 350           0, &hs_virtual_server, NULL },
 351
 352         { "port", PW_TYPE_INTEGER,
 353           offsetof(home_server,port), NULL,   "0" },
 354
 355         { "type",  PW_TYPE_STRING_PTR,
 356           0, &hs_type, NULL },
 357
 358 #ifdef WITH_TCP
 359         { "proto",  PW_TYPE_STRING_PTR,
 360           0, &hs_proto, NULL },
 361 #endif
 362
 363         { "secret",  PW_TYPE_STRING_PTR,
 364           offsetof(home_server,secret), NULL,  NULL},
 365
 366         { "src_ipaddr",  PW_TYPE_STRING_PTR,
 367           0, &hs_srcipaddr,  NULL },
 368
 369         { "response_window", PW_TYPE_INTEGER,
 370           offsetof(home_server,response_window), NULL,   "30" },
 371         { "max_outstanding", PW_TYPE_INTEGER,
 372           offsetof(home_server,max_outstanding), NULL,   "65536" },
 373
 374         { "zombie_period", PW_TYPE_INTEGER,
 375           offsetof(home_server,zombie_period), NULL,   "40" },
 376         { "status_check", PW_TYPE_STRING_PTR,
 377           0, &hs_check,   "none" },
 378         { "ping_check", PW_TYPE_STRING_PTR,
 379           0, &hs_check,   NULL },
 380
 381         { "ping_interval", PW_TYPE_INTEGER,
 382           offsetof(home_server,ping_interval), NULL,   "30" },
 383         { "check_interval", PW_TYPE_INTEGER,
 384           offsetof(home_server,ping_interval), NULL,   "30" },
 385         { "num_answers_to_alive", PW_TYPE_INTEGER,
 386           offsetof(home_server,num_pings_to_alive), NULL,   "3" },
 387         { "revive_interval", PW_TYPE_INTEGER,
 388           offsetof(home_server,revive_interval), NULL,   "300" },
 389         { "status_check_timeout", PW_TYPE_INTEGER,
 390           offsetof(home_server,ping_timeout), NULL,   "4" },
 391
 392         { "username",  PW_TYPE_STRING_PTR,
 393           offsetof(home_server,ping_user_name), NULL,  NULL},
 394         { "password",  PW_TYPE_STRING_PTR,
 395           offsetof(home_server,ping_user_password), NULL,  NULL},
 396
 397 #ifdef WITH_STATS
 398         { "historic_average_window", PW_TYPE_INTEGER,
 399           offsetof(home_server,ema.window), NULL,  NULL },
 400 #endif
 401
 402 #ifdef WITH_COA
 403         {  "coa", PW_TYPE_SUBSECTION, 0, NULL, (const void *) home_server_coa },
 404 #endif
 405
 406         { "limit", PW_TYPE_SUBSECTION, 0, NULL, (const void *) limit_config },
 407
 408         { NULL, -1, 0, NULL, NULL }             /* end the list */
 409 };
 410
 411
 412 static void null_free(UNUSED void *data)
 413 {
 414 }
 415
 416 static int home_server_add(realm_config_t *rc, CONF_SECTION *cs)
 417 {
 418         const char *name2;
 419         home_server *home;
 420         int dual = FALSE;
 421         CONF_PAIR *cp;
 422         CONF_SECTION *tls;
 423
 424         hs_virtual_server = NULL;
 425
 426         name2 = cf_section_name2(cs);
 427         if (!name2) {
 428                 cf_log_err(cf_sectiontoitem(cs),
 429                            "Home server section is missing a name.");
 430                 return 0;
 431         }
 432
 433         home = rad_malloc(sizeof(*home));
 434         memset(home, 0, sizeof(*home));
 435
 436         home->name = name2;
 437         home->cs = cs;
 438         home->state = HOME_STATE_UNKNOWN;
 439
 440         /*
 441          *      Last packet sent / received are zero.
 442          */
 443
 444         memset(&hs_ip4addr, 0, sizeof(hs_ip4addr));
 445         memset(&hs_ip6addr, 0, sizeof(hs_ip6addr));
 446         if (cf_section_parse(cs, home, home_server_config) < 0) {
 447                 goto error;
 448         }
 449
 450         /*
 451          *      Figure out which one to use.
 452          */
 453         if (cf_pair_find(cs, "ipaddr")) {
 454                 home->ipaddr.af = AF_INET;
 455                 home->ipaddr.ipaddr.ip4addr = hs_ip4addr;
 456
 457         } else if (cf_pair_find(cs, "ipv6addr")) {
 458                 home->ipaddr.af = AF_INET6;
 459                 home->ipaddr.ipaddr.ip6addr = hs_ip6addr;
 460
 461         } else if ((cp = cf_pair_find(cs, "virtual_server")) != NULL) {
 462                 home->ipaddr.af = AF_UNSPEC;
 463                 home->server = cf_pair_value(cp);
 464                 if (!home->server) {
 465                         cf_log_err(cf_sectiontoitem(cs),
 466                                    "Invalid value for virtual_server");
 467                         goto error;
 468                 }
 469
 470                 if (!cf_section_sub_find_name2(rc->cs, "server", home->server)) {
 471
 472                         cf_log_err(cf_sectiontoitem(cs),
 473                                    "No such server %s", home->server);
 474                         goto error;
 475                 }
 476
 477                 /*
 478                  *      When CoA is used, the user has to specify the type
 479                  *      of the home server, even when they point to
 480                  *      virtual servers.
 481                  */
 482                 home->secret = strdup("");
 483                 goto skip_port;
 484
 485         } else {
 486                 cf_log_err(cf_sectiontoitem(cs),
 487                            "No ipaddr, ipv6addr, or virtual_server defined for home server \"%s\".",
 488                            name2);
 489         error:
 490                 hs_type = NULL;
 491                 hs_check = NULL;
 492                 hs_srcipaddr = NULL;
 493 #ifdef WITH_TCP
 494                 hs_proto = NULL;
 495 #endif
 496                 return 0;
 497         }
 498
 499         if (!home->port || (home->port > 65535)) {
 500                 cf_log_err(cf_sectiontoitem(cs),
 501                            "No port, or invalid port defined for home server %s.",
 502                            name2);
 503                 goto error;
 504         }
 505
 506         if (0) {
 507                 cf_log_err(cf_sectiontoitem(cs),
 508                            "Fatal error!  Home server %s is ourselves!",
 509                            name2);
 510                 goto error;
 511         }
 512
 513         if (!home->secret) {
 514                 cf_log_err(cf_sectiontoitem(cs),
 515                            "No shared secret defined for home server %s.",
 516                            name2);
 517                 goto error;
 518         }
 519
 520         /*
 521          *      Use a reasonable default.
 522          */
 523  skip_port:
 524         if (!hs_type) hs_type = strdup("auth+acct");
 525
 526         if (strcasecmp(hs_type, "auth") == 0) {
 527                 home->type = HOME_TYPE_AUTH;
 528
 529         } else if (strcasecmp(hs_type, "acct") == 0) {
 530                 home->type = HOME_TYPE_ACCT;
 531
 532         } else if (strcasecmp(hs_type, "auth+acct") == 0) {
 533                 home->type = HOME_TYPE_AUTH;
 534                 dual = TRUE;
 535
 536 #ifdef WITH_COA
 537         } else if (strcasecmp(hs_type, "coa") == 0) {
 538                 home->type = HOME_TYPE_COA;
 539                 dual = FALSE;
 540
 541                 if (home->server != NULL) {
 542                         cf_log_err(cf_sectiontoitem(cs),
 543                                    "Home servers of type \"coa\" cannot point to a virtual server");
 544                         goto error;
 545                 }
 546 #endif
 547
 548         } else {
 549                 cf_log_err(cf_sectiontoitem(cs),
 550                            "Invalid type \"%s\" for home server %s.",
 551                            hs_type, name2);
 552                 goto error;
 553         }
 554         hs_type = NULL;
 555
 556         if (!hs_check || (strcasecmp(hs_check, "none") == 0)) {
 557                 home->ping_check = HOME_PING_CHECK_NONE;
 558
 559         } else if (strcasecmp(hs_check, "status-server") == 0) {
 560                 home->ping_check = HOME_PING_CHECK_STATUS_SERVER;
 561
 562         } else if (strcasecmp(hs_check, "request") == 0) {
 563                 home->ping_check = HOME_PING_CHECK_REQUEST;
 564
 565                 if (!home->ping_user_name ||
 566                     !*home->ping_user_name) {
 567                         cf_log_err(cf_sectiontoitem(cs), "You must supply a 'username' to enable status_check=request");
 568                         goto error;
 569                 }
 570
 571                 if ((home->type == HOME_TYPE_AUTH) &&
 572                     (!home->ping_user_password ||
 573                      !*home->ping_user_password)) {
 574                         cf_log_err(cf_sectiontoitem(cs), "You must supply a password to enable status_check=request");
 575                         goto error;
 576                 }
 577
 578         } else {
 579                 cf_log_err(cf_sectiontoitem(cs),
 580                            "Invalid status__check \"%s\" for home server %s.",
 581                            hs_check, name2);
 582                 goto error;
 583         }
 584         hs_check = NULL;
 585
 586         if ((home->ping_check != HOME_PING_CHECK_NONE) &&
 587             (home->ping_check != HOME_PING_CHECK_STATUS_SERVER)) {
 588                 if (!home->ping_user_name) {
 589                         cf_log_err(cf_sectiontoitem(cs), "You must supply a user name to enable status_check=request");
 590                         goto error;
 591                 }
 592
 593                 if ((home->type == HOME_TYPE_AUTH) &&
 594                     !home->ping_user_password) {
 595                         cf_log_err(cf_sectiontoitem(cs), "You must supply a password to enable status_check=request");
 596                         goto error;
 597                 }
 598         }
 599
 600         home->proto = IPPROTO_UDP;
 601 #ifdef WITH_TCP
 602         if (hs_proto) {
 603                 if (strcmp(hs_proto, "udp") == 0) {
 604                         hs_proto = NULL;
 605
 606                 } else if (strcmp(hs_proto, "tcp") == 0) {
 607                         hs_proto = NULL;
 608                         home->proto = IPPROTO_TCP;
 609
 610                         if (home->ping_check != HOME_PING_CHECK_NONE) {
 611                                 cf_log_err(cf_sectiontoitem(cs),
 612                                            "Only 'status_check = none' is allowed for home servers with 'proto = tcp'");
 613                                 goto error;
 614                         }
 615
 616                 } else {
 617                         cf_log_err(cf_sectiontoitem(cs),
 618                                    "Unknown proto \"%s\".", hs_proto);
 619                         goto error;
 620                 }
 621         }
 622 #endif
 623
 624         if (!home->server &&
 625             rbtree_finddata(home_servers_byaddr, home)) {
 626                 cf_log_err(cf_sectiontoitem(cs), "Duplicate home server");
 627                 goto error;
 628         }
 629
 630         /*
 631          *      Check the TLS configuration.
 632          */
 633         tls = cf_section_sub_find(cs, "tls");
 634
 635         /*
 636          *      If the home is a virtual server, don't look up source IP.
 637          */
 638         if (!home->server) {
 639                 rad_assert(home->ipaddr.af != AF_UNSPEC);
 640
 641                 /*
 642                  *      Otherwise look up the source IP using the same
 643                  *      address family as the destination IP.
 644                  */
 645                 if (hs_srcipaddr) {
 646                         if (ip_hton(hs_srcipaddr, home->ipaddr.af, &home->src_ipaddr) < 0) {
 647                                 cf_log_err(cf_sectiontoitem(cs), "Failed parsing src_ipaddr");
 648                                 goto error;
 649                         }
 650
 651                 } else {
 652                         /*
 653                          *      Source isn't specified: Source is
 654                          *      the correct address family, but all zeros.
 655                          */
 656                         memset(&home->src_ipaddr, 0, sizeof(home->src_ipaddr));
 657                         home->src_ipaddr.af = home->ipaddr.af;
 658                 }
 659
 660                 if (tls && (home->proto != IPPROTO_TCP)) {
 661                         cf_log_err(cf_sectiontoitem(cs), "TLS transport is not available for UDP sockets.");
 662                         goto error;
 663                 }
 664
 665 #ifndef WITH_TLS
 666
 667                 if (tls) {
 668                         cf_log_err(cf_sectiontoitem(cs), "TLS transport is not available in this executable.");
 669                         goto error;
 670                 }
 671 #else
 672                 /*
 673                  *      Parse the SSL client configuration.
 674                  */
 675                 if (tls) {
 676                         home->tls = tls_client_conf_parse(tls);
 677                         if (!home->tls) {
 678                                 goto error;
 679                         }
 680                 }
 681 #endif
 682
 683         } else if (tls) {
 684                 cf_log_err(cf_sectiontoitem(cs), "Virtual home_servers cannot have a \"tls\" subsection");
 685                 goto error;
 686         }
 687
 688         /*
 689          *      Make sure that this is set.
 690          */
 691         if (home->src_ipaddr.af == AF_UNSPEC) {
 692                 home->src_ipaddr.af = home->ipaddr.af;
 693         }
 694
 695         hs_srcipaddr = NULL;
 696
 697         if (rbtree_finddata(home_servers_byname, home) != NULL) {
 698                 cf_log_err(cf_sectiontoitem(cs),
 699                            "Duplicate home server name %s.", name2);
 700                 goto error;
 701         }
 702
 703         if (!home->server &&
 704             (rbtree_finddata(home_servers_byaddr, home) != NULL)) {
 705                 cf_log_err(cf_sectiontoitem(cs),
 706                            "Duplicate home server IP %s.", name2);
 707                 goto error;
 708         }
 709
 710         if (!rbtree_insert(home_servers_byname, home)) {
 711                 cf_log_err(cf_sectiontoitem(cs),
 712                            "Internal error %d adding home server %s.",
 713                            __LINE__, name2);
 714                 goto error;
 715         }
 716
 717         if (!home->server &&
 718             !rbtree_insert(home_servers_byaddr, home)) {
 719                 rbtree_deletebydata(home_servers_byname, home);
 720                 cf_log_err(cf_sectiontoitem(cs),
 721                            "Internal error %d adding home server %s.",
 722                            __LINE__, name2);
 723                 goto error;
 724         }
 725
 726 #ifdef WITH_STATS
 727         home->number = home_server_max_number++;
 728         if (!rbtree_insert(home_servers_bynumber, home)) {
 729                 rbtree_deletebydata(home_servers_byname, home);
 730                 if (home->ipaddr.af != AF_UNSPEC) {
 731                         rbtree_deletebydata(home_servers_byname, home);
 732                 }
 733                 cf_log_err(cf_sectiontoitem(cs),
 734                            "Internal error %d adding home server %s.",
 735                            __LINE__, name2);
 736                 goto error;
 737         }
 738 #endif
 739
 740         if (home->max_outstanding < 8) home->max_outstanding = 8;
 741         if (home->max_outstanding > 65536*16) home->max_outstanding = 65536*16;
 742
 743         if (home->ping_interval < 6) home->ping_interval = 6;
 744         if (home->ping_interval > 120) home->ping_interval = 120;
 745
 746         if (home->response_window < 1) home->response_window = 1;
 747         if (home->response_window > 60) home->response_window = 60;
 748         if (home->response_window > mainconfig.max_request_time) home->response_window = mainconfig.max_request_time;
 749
 750         if (home->zombie_period < 1) home->zombie_period = 1;
 751         if (home->zombie_period > 120) home->zombie_period = 120;
 752
 753         if (home->zombie_period < home->response_window) {
 754                 home->zombie_period = home->response_window;
 755         }
 756
 757         if (home->num_pings_to_alive < 3) home->num_pings_to_alive = 3;
 758         if (home->num_pings_to_alive > 10) home->num_pings_to_alive = 10;
 759
 760         if (home->ping_timeout < 3) home->ping_timeout = 3;
 761         if (home->ping_timeout > 10) home->ping_timeout = 10;
 762
 763         if (home->revive_interval < 60) home->revive_interval = 60;
 764         if (home->revive_interval > 3600) home->revive_interval = 3600;
 765
 766 #ifdef WITH_COA
 767         if (home->coa_irt < 1) home->coa_irt = 1;
 768         if (home->coa_irt > 5) home->coa_irt = 5;
 769
 770         if (home->coa_mrc < 0) home->coa_mrc = 0;
 771         if (home->coa_mrc > 20 ) home->coa_mrc = 20;
 772
 773         if (home->coa_mrt < 0) home->coa_mrt = 0;
 774         if (home->coa_mrt > 30 ) home->coa_mrt = 30;
 775
 776         if (home->coa_mrd < 5) home->coa_mrd = 5;
 777         if (home->coa_mrd > 60 ) home->coa_mrd = 60;
 778 #endif
 779
 780         if (home->limit.max_connections > 1024) home->limit.max_connections = 1024;
 781
 782 #ifdef WITH_TCP
 783         /*
 784          *      UDP sockets can't be connection limited.
 785          */
 786         if (home->proto != IPPROTO_TCP) home->limit.max_connections = 0;
 787 #endif
 788
 789         if ((home->limit.idle_timeout > 0) && (home->limit.idle_timeout < 5))
 790                 home->limit.idle_timeout = 5;
 791         if ((home->limit.lifetime > 0) && (home->limit.lifetime < 5))
 792                 home->limit.lifetime = 5;
 793         if ((home->limit.lifetime > 0) && (home->limit.idle_timeout > home->limit.lifetime))
 794                 home->limit.idle_timeout = 0;
 795
 796         tls = cf_item_parent(cf_sectiontoitem(cs));
 797         if (strcmp(cf_section_name1(tls), "server") == 0) {
 798                 home->parent_server = cf_section_name2(tls);
 799         }
 800
 801         if (dual) {
 802                 home_server *home2 = rad_malloc(sizeof(*home2));
 803
 804                 memcpy(home2, home, sizeof(*home2));
 805
 806                 home2->type = HOME_TYPE_ACCT;
 807                 home2->port++;
 808                 home2->ping_user_password = NULL;
 809                 home2->cs = cs;
 810                 home2->parent_server = home->parent_server;
 811
 812                 if (!rbtree_insert(home_servers_byname, home2)) {
 813                         cf_log_err(cf_sectiontoitem(cs),
 814                                    "Internal error %d adding home server %s.",
 815                                    __LINE__, name2);
 816                         free(home2);
 817                         return 0;
 818                 }
 819
 820                 if (!home->server &&
 821                     !rbtree_insert(home_servers_byaddr, home2)) {
 822                         rbtree_deletebydata(home_servers_byname, home2);
 823                         cf_log_err(cf_sectiontoitem(cs),
 824                                    "Internal error %d adding home server %s.",
 825                                    __LINE__, name2);
 826                         free(home2);
 827                         return 0;
 828                 }
 829
 830 #ifdef WITH_STATS
 831                 home2->number = home_server_max_number++;
 832                 if (!rbtree_insert(home_servers_bynumber, home2)) {
 833                         rbtree_deletebydata(home_servers_byname, home2);
 834                         if (!home2->server) {
 835                                 rbtree_deletebydata(home_servers_byname, home2);
 836                         }
 837                         cf_log_err(cf_sectiontoitem(cs),
 838                                    "Internal error %d adding home server %s.",
 839                                    __LINE__, name2);
 840                         free(home2);
 841                         return 0;
 842                 }
 843 #endif
 844         }
 845
 846         /*
 847          *      Mark it as already processed
 848          */
 849         cf_data_add(cs, "home_server", null_free, null_free);
 850
 851         return 1;
 852 }
 853
 854
 855 static home_pool_t *server_pool_alloc(const char *name, home_pool_type_t type,
 856                                       int server_type, int num_home_servers)
 857 {
 858         home_pool_t *pool;
 859
 860         pool = rad_malloc(sizeof(*pool) + (sizeof(pool->servers[0]) *
 861                                            num_home_servers));
 862         if (!pool) return NULL; /* just for pairanoia */
 863
 864         memset(pool, 0, sizeof(*pool) + (sizeof(pool->servers[0]) *
 865                                          num_home_servers));
 866
 867         pool->name = name;
 868         pool->type = type;
 869         pool->server_type = server_type;
 870         pool->num_home_servers = num_home_servers;
 871
 872         return pool;
 873 }
 874
 875 static int pool_check_home_server(realm_config_t *rc, CONF_PAIR *cp,
 876                                   const char *name, int server_type,
 877                                   home_server **phome)
 878 {
 879         home_server myhome, *home;
 880         CONF_SECTION *server_cs;
 881
 882         if (!name) {
 883                 cf_log_err(cf_pairtoitem(cp),
 884                            "No value given for home_server.");
 885                 return 0;
 886         }
 887
 888         myhome.name = name;
 889         myhome.type = server_type;
 890         home = rbtree_finddata(home_servers_byname, &myhome);
 891         if (home) {
 892                 *phome = home;
 893                 return 1;
 894         }
 895
 896         server_cs = cf_section_sub_find_name2(rc->cs, "home_server", name);
 897         if (!server_cs) {
 898                 cf_log_err(cf_pairtoitem(cp),
 899                            "Unknown home_server \"%s\".", name);
 900                 return 0;
 901         }
 902
 903         home = rbtree_finddata(home_servers_byname, &myhome);
 904         if (!home) {
 905                 cf_log_err(cf_pairtoitem(cp),
 906                            "Internal error %d adding home server \"%s\".",
 907                            __LINE__, name);
 908                 return 0;
 909         }
 910
 911         *phome = home;
 912         return 1;
 913 }
 914
 915
 916 static int server_pool_add(realm_config_t *rc,
 917                            CONF_SECTION *cs, int server_type, int do_print)
 918 {
 919         const char *name2;
 920         home_pool_t *pool = NULL;
 921         const char *value;
 922         CONF_PAIR *cp;
 923         int num_home_servers;
 924         home_server *home;
 925
 926         name2 = cf_section_name1(cs);
 927         if (!name2 || ((strcasecmp(name2, "server_pool") != 0) &&
 928                        (strcasecmp(name2, "home_server_pool") != 0))) {
 929                 cf_log_err(cf_sectiontoitem(cs),
 930                            "Section is not a home_server_pool.");
 931                 return 0;
 932         }
 933
 934         name2 = cf_section_name2(cs);
 935         if (!name2) {
 936                 cf_log_err(cf_sectiontoitem(cs),
 937                            "Server pool section is missing a name.");
 938                 return 0;
 939         }
 940
 941         /*
 942          *      Count the home servers and initalize them.
 943          */
 944         num_home_servers = 0;
 945         for (cp = cf_pair_find(cs, "home_server");
 946              cp != NULL;
 947              cp = cf_pair_find_next(cs, cp, "home_server")) {
 948                 num_home_servers++;
 949
 950                 if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
 951                                             server_type, &home)) {
 952                         return 0;
 953                 }
 954         }
 955
 956         if (num_home_servers == 0) {
 957                 cf_log_err(cf_sectiontoitem(cs),
 958                            "No home servers defined in pool %s",
 959                            name2);
 960                 goto error;
 961         }
 962
 963         pool = server_pool_alloc(name2, HOME_POOL_FAIL_OVER, server_type,
 964                                  num_home_servers);
 965         pool->cs = cs;
 966
 967
 968         /*
 969          *      Fallback servers must be defined, and must be
 970          *      virtual servers.
 971          */
 972         cp = cf_pair_find(cs, "fallback");
 973         if (cp) {
 974 #ifdef WITH_COA
 975                 if (server_type == HOME_TYPE_COA) {
 976                         cf_log_err(cf_sectiontoitem(cs), "Home server pools of type \"coa\" cannot have a fallback virtual server.");
 977                         goto error;
 978                 }
 979 #endif
 980
 981                 if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
 982                                             server_type, &pool->fallback)) {
 983
 984                         goto error;
 985                 }
 986
 987                 if (!pool->fallback->server) {
 988                         cf_log_err(cf_sectiontoitem(cs), "Fallback home_server %s does NOT contain a virtual_server directive.", pool->fallback->name);
 989                         goto error;
 990                 }
 991         }
 992
 993         if (do_print) cf_log_info(cs, " home_server_pool %s {", name2);
 994
 995         cp = cf_pair_find(cs, "type");
 996         if (cp) {
 997                 static FR_NAME_NUMBER pool_types[] = {
 998                         { "load-balance", HOME_POOL_LOAD_BALANCE },
 999                         { "fail-over", HOME_POOL_FAIL_OVER },
1000                         { "round_robin", HOME_POOL_LOAD_BALANCE },
1001                         { "fail_over", HOME_POOL_FAIL_OVER },
1002                         { "client-balance", HOME_POOL_CLIENT_BALANCE },
1003                         { "client-port-balance", HOME_POOL_CLIENT_PORT_BALANCE },
1004                         { "keyed-balance", HOME_POOL_KEYED_BALANCE },
1005                         { NULL, 0 }
1006                 };
1007
1008                 value = cf_pair_value(cp);
1009                 if (!value) {
1010                         cf_log_err(cf_pairtoitem(cp),
1011                                    "No value given for type.");
1012                         goto error;
1013                 }
1014
1015                 pool->type = fr_str2int(pool_types, value, 0);
1016                 if (!pool->type) {
1017                         cf_log_err(cf_pairtoitem(cp),
1018                                    "Unknown type \"%s\".",
1019                                    value);
1020                         goto error;
1021                 }
1022
1023                 if (do_print) cf_log_info(cs, "\ttype = %s", value);
1024         }
1025
1026         cp = cf_pair_find(cs, "virtual_server");
1027         if (cp) {
1028                 pool->virtual_server = cf_pair_value(cp);
1029                 if (!pool->virtual_server) {
1030                         cf_log_err(cf_pairtoitem(cp), "No value given for virtual_server");
1031                         goto error;
1032                 }
1033
1034                 if (do_print) {
1035                         cf_log_info(cs, "\tvirtual_server = %s", pool->virtual_server);
1036                 }
1037
1038                 if (!cf_section_sub_find_name2(rc->cs, "server",
1039                                                pool->virtual_server)) {
1040                         cf_log_err(cf_pairtoitem(cp), "No such server %s",
1041                                    pool->virtual_server);
1042                         goto error;
1043                 }
1044
1045         }
1046
1047         num_home_servers = 0;
1048         for (cp = cf_pair_find(cs, "home_server");
1049              cp != NULL;
1050              cp = cf_pair_find_next(cs, cp, "home_server")) {
1051                 home_server myhome;
1052
1053                 value = cf_pair_value(cp);
1054
1055                 memset(&myhome, 0, sizeof(myhome));
1056                 myhome.name = value;
1057                 myhome.type = server_type;
1058
1059                 home = rbtree_finddata(home_servers_byname, &myhome);
1060                 if (!home) {
1061                         DEBUG2("Internal sanity check failed");
1062                         goto error;
1063                 }
1064
1065                 if (0) {
1066                         DEBUG2("Warning: Duplicate home server %s in server pool %s", home->name, pool->name);
1067                         continue;
1068                 }
1069
1070                 if (do_print) cf_log_info(cs, "\thome_server = %s", home->name);
1071                 pool->servers[num_home_servers++] = home;
1072         } /* loop over home_server's */
1073
1074         if (pool->fallback && do_print) {
1075                 cf_log_info(cs, "\tfallback = %s", pool->fallback->name);
1076         }
1077
1078         if (!rbtree_insert(home_pools_byname, pool)) {
1079                 rad_assert("Internal sanity check failed");
1080                 goto error;
1081         }
1082
1083         if (do_print) cf_log_info(cs, " }");
1084
1085         cf_data_add(cs, "home_server_pool", pool, free);
1086
1087         rad_assert(pool->server_type != 0);
1088
1089         return 1;
1090
1091  error:
1092         if (do_print) cf_log_info(cs, " }");
1093         free(pool);
1094         return 0;
1095 }
1096 #endif
1097
1098 static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
1099                           const char *realm,
1100                           const char *name, const char *secret,
1101                           home_pool_type_t ldflag, home_pool_t **pool_p,
1102                           int type, const char *server)
1103 {
1104 #ifdef WITH_PROXY
1105         int i, insert_point, num_home_servers;
1106         home_server myhome, *home;
1107         home_pool_t mypool, *pool;
1108         CONF_SECTION *subcs;
1109 #else
1110         rc = rc;                /* -Wunused */
1111         realm = realm;
1112         secret = secret;
1113         ldflag = ldflag;
1114         type = type;
1115         server = server;
1116 #endif
1117
1118         /*
1119          *      LOCAL realms get sanity checked, and nothing else happens.
1120          */
1121         if (strcmp(name, "LOCAL") == 0) {
1122                 if (*pool_p) {
1123                         cf_log_err(cf_sectiontoitem(cs), "Realm \"%s\" cannot be both LOCAL and remote", name);
1124                         return 0;
1125                 }
1126                 return 1;
1127         }
1128
1129 #ifndef WITH_PROXY
1130         return 0;               /* Not proxying.  Can't do non-LOCAL realms */
1131
1132 #else
1133         mypool.name = realm;
1134         mypool.server_type = type;
1135         pool = rbtree_finddata(home_pools_byname, &mypool);
1136         if (pool) {
1137                 if (pool->type != ldflag) {
1138                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent ldflag for server pool \"%s\"", name);
1139                         return 0;
1140                 }
1141
1142                 if (pool->server_type != type) {
1143                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent home server type for server pool \"%s\"", name);
1144                         return 0;
1145                 }
1146         }
1147
1148         myhome.name = name;
1149         myhome.type = type;
1150         home = rbtree_finddata(home_servers_byname, &myhome);
1151         if (home) {
1152                 if (secret && (strcmp(home->secret, secret) != 0)) {
1153                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent shared secret for home server \"%s\"", name);
1154                         return 0;
1155                 }
1156
1157                 if (home->type != type) {
1158                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent type for home server \"%s\"", name);
1159                         return 0;
1160                 }
1161
1162                 /*
1163                  *      See if the home server is already listed
1164                  *      in the pool.  If so, do nothing else.
1165                  */
1166                 if (pool) for (i = 0; i < pool->num_home_servers; i++) {
1167                         if (pool->servers[i] == home) {
1168                                 return 1;
1169                         }
1170                 }
1171         }
1172
1173         /*
1174          *      If we do have a pool, check that there is room to
1175          *      insert the home server we've found, or the one that we
1176          *      create here.
1177          *
1178          *      Note that we insert it into the LAST available
1179          *      position, in order to maintain the same order as in
1180          *      the configuration files.
1181          */
1182         insert_point = -1;
1183         if (pool) {
1184                 for (i = pool->num_home_servers - 1; i >= 0; i--) {
1185                         if (pool->servers[i]) break;
1186
1187                         if (!pool->servers[i]) {
1188                                 insert_point = i;
1189                         }
1190                 }
1191
1192                 if (insert_point < 0) {
1193                         cf_log_err(cf_sectiontoitem(cs), "No room in pool to add home server \"%s\".  Please update the realm configuration to use the new-style home servers and server pools.", name);
1194                         return 0;
1195                 }
1196         }
1197
1198         /*
1199          *      No home server, allocate one.
1200          */
1201         if (!home) {
1202                 const char *p;
1203                 char *q;
1204
1205                 home = rad_malloc(sizeof(*home));
1206                 memset(home, 0, sizeof(*home));
1207
1208                 home->name = name;
1209                 home->hostname = name;
1210                 home->type = type;
1211                 home->secret = secret;
1212                 home->cs = cs;
1213                 home->proto = IPPROTO_UDP;
1214
1215                 p = strchr(name, ':');
1216                 if (!p) {
1217                         if (type == HOME_TYPE_AUTH) {
1218                                 home->port = PW_AUTH_UDP_PORT;
1219                         } else {
1220                                 home->port = PW_ACCT_UDP_PORT;
1221                         }
1222
1223                         p = name;
1224                         q = NULL;
1225
1226                 } else if (p == name) {
1227                                 cf_log_err(cf_sectiontoitem(cs),
1228                                            "Invalid hostname %s.",
1229                                            name);
1230                                 free(home);
1231                                 return 0;
1232
1233                 } else {
1234                         home->port = atoi(p + 1);
1235                         if ((home->port == 0) || (home->port > 65535)) {
1236                                 cf_log_err(cf_sectiontoitem(cs),
1237                                            "Invalid port %s.",
1238                                            p + 1);
1239                                 free(home);
1240                                 return 0;
1241                         }
1242
1243                         q = rad_malloc((p - name) + 1);
1244                         memcpy(q, name, (p - name));
1245                         q[p - name] = '\0';
1246                         p = q;
1247                 }
1248
1249                 if (!server) {
1250                         if (ip_hton(p, AF_UNSPEC, &home->ipaddr) < 0) {
1251                                 cf_log_err(cf_sectiontoitem(cs),
1252                                            "Failed looking up hostname %s.",
1253                                            p);
1254                                 free(home);
1255                                 free(q);
1256                                 return 0;
1257                         }
1258                         home->src_ipaddr.af = home->ipaddr.af;
1259                 } else {
1260                         home->ipaddr.af = AF_UNSPEC;
1261                         home->server = server;
1262                 }
1263                 free(q);
1264
1265                 /*
1266                  *      Use the old-style configuration.
1267                  */
1268                 home->max_outstanding = 65535*16;
1269                 home->zombie_period = rc->retry_delay * rc->retry_count;
1270                 if (home->zombie_period == 0) home->zombie_period =30;
1271                 home->response_window = home->zombie_period - 1;
1272
1273                 home->ping_check = HOME_PING_CHECK_NONE;
1274
1275                 home->revive_interval = rc->dead_time;
1276
1277                 if (rbtree_finddata(home_servers_byaddr, home)) {
1278                         cf_log_err(cf_sectiontoitem(cs), "Home server %s has the same IP address and/or port as another home server.", name);
1279                         free(home);
1280                         return 0;
1281                 }
1282
1283                 if (!rbtree_insert(home_servers_byname, home)) {
1284                         cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
1285                         free(home);
1286                         return 0;
1287                 }
1288
1289                 if (!rbtree_insert(home_servers_byaddr, home)) {
1290                         rbtree_deletebydata(home_servers_byname, home);
1291                         cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
1292                         free(home);
1293                         return 0;
1294                 }
1295
1296 #ifdef WITH_STATS
1297                 home->number = home_server_max_number++;
1298                 if (!rbtree_insert(home_servers_bynumber, home)) {
1299                         rbtree_deletebydata(home_servers_byname, home);
1300                         if (home->ipaddr.af != AF_UNSPEC) {
1301                                 rbtree_deletebydata(home_servers_byname, home);
1302                         }
1303                         cf_log_err(cf_sectiontoitem(cs),
1304                                    "Internal error %d adding home server %s.",
1305                                    __LINE__, name);
1306                         free(home);
1307                         return 0;
1308                 }
1309 #endif
1310         }
1311
1312         /*
1313          *      We now have a home server, see if we can insert it
1314          *      into pre-existing pool.
1315          */
1316         if (insert_point >= 0) {
1317                 rad_assert(pool != NULL);
1318                 pool->servers[insert_point] = home;
1319                 return 1;
1320         }
1321
1322         rad_assert(pool == NULL);
1323         rad_assert(home != NULL);
1324
1325         /*
1326          *      Count the old-style realms of this name.
1327          */
1328         num_home_servers = 0;
1329         for (subcs = cf_section_find_next(cs, NULL, "realm");
1330              subcs != NULL;
1331              subcs = cf_section_find_next(cs, subcs, "realm")) {
1332                 const char *this = cf_section_name2(subcs);
1333
1334                 if (!this || (strcmp(this, realm) != 0)) continue;
1335                 num_home_servers++;
1336         }
1337
1338         if (num_home_servers == 0) {
1339                 cf_log_err(cf_sectiontoitem(cs), "Internal error counting pools for home server %s.", name);
1340                 free(home);
1341                 return 0;
1342         }
1343
1344         pool = server_pool_alloc(realm, ldflag, type, num_home_servers);
1345         pool->cs = cs;
1346
1347         pool->servers[0] = home;
1348
1349         if (!rbtree_insert(home_pools_byname, pool)) {
1350                 rad_assert("Internal sanity check failed");
1351                 return 0;
1352         }
1353
1354         *pool_p = pool;
1355
1356         return 1;
1357 #endif
1358 }
1359
1360 static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
1361 {
1362         const char *host;
1363         const char *secret = NULL;
1364         home_pool_type_t ldflag;
1365         CONF_PAIR *cp;
1366
1367         cp = cf_pair_find(cs, "ldflag");
1368         ldflag = HOME_POOL_FAIL_OVER;
1369         if (cp) {
1370                 host = cf_pair_value(cp);
1371                 if (!host) {
1372                         cf_log_err(cf_pairtoitem(cp), "No value specified for ldflag");
1373                         return 0;
1374                 }
1375
1376                 if (strcasecmp(host, "fail_over") == 0) {
1377                         cf_log_info(cs, "\tldflag = fail_over");
1378
1379                 } else if (strcasecmp(host, "round_robin") == 0) {
1380                         ldflag = HOME_POOL_LOAD_BALANCE;
1381                         cf_log_info(cs, "\tldflag = round_robin");
1382
1383                 } else {
1384                         cf_log_err(cf_sectiontoitem(cs), "Unknown value \"%s\" for ldflag", host);
1385                         return 0;
1386                 }
1387         } /* else don't print it. */
1388
1389         /*
1390          *      Allow old-style if it doesn't exist, or if it exists and
1391          *      it's LOCAL.
1392          */
1393         cp = cf_pair_find(cs, "authhost");
1394         if (cp) {
1395                 host = cf_pair_value(cp);
1396                 if (!host) {
1397                         cf_log_err(cf_pairtoitem(cp), "No value specified for authhost");
1398                         return 0;
1399                 }
1400
1401                 if (strcmp(host, "LOCAL") != 0) {
1402                         cp = cf_pair_find(cs, "secret");
1403                         if (!cp) {
1404                                 cf_log_err(cf_sectiontoitem(cs), "No shared secret supplied for realm: %s", r->name);
1405                                 return 0;
1406                         }
1407
1408                         secret = cf_pair_value(cp);
1409                         if (!secret) {
1410                                 cf_log_err(cf_pairtoitem(cp), "No value specified for secret");
1411                                 return 0;
1412                         }
1413                 }
1414
1415                 cf_log_info(cs, "\tauthhost = %s",  host);
1416
1417                 if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
1418                                     &r->auth_pool, HOME_TYPE_AUTH, NULL)) {
1419                         return 0;
1420                 }
1421         }
1422
1423         cp = cf_pair_find(cs, "accthost");
1424         if (cp) {
1425                 host = cf_pair_value(cp);
1426                 if (!host) {
1427                         cf_log_err(cf_pairtoitem(cp), "No value specified for accthost");
1428                         return 0;
1429                 }
1430
1431                 /*
1432                  *      Don't look for a secret again if it was found
1433                  *      above.
1434                  */
1435                 if ((strcmp(host, "LOCAL") != 0) && !secret) {
1436                         cp = cf_pair_find(cs, "secret");
1437                         if (!cp) {
1438                                 cf_log_err(cf_sectiontoitem(cs), "No shared secret supplied for realm: %s", r->name);
1439                                 return 0;
1440                         }
1441
1442                         secret = cf_pair_value(cp);
1443                         if (!secret) {
1444                                 cf_log_err(cf_pairtoitem(cp), "No value specified for secret");
1445                                 return 0;
1446                         }
1447                 }
1448
1449                 cf_log_info(cs, "\taccthost = %s", host);
1450
1451                 if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
1452                                     &r->acct_pool, HOME_TYPE_ACCT, NULL)) {
1453                         return 0;
1454                 }
1455         }
1456
1457         cp = cf_pair_find(cs, "virtual_server");
1458         if (cp) {
1459                 host = cf_pair_value(cp);
1460                 if (!host) {
1461                         cf_log_err(cf_pairtoitem(cp), "No value specified for virtual_server");
1462                         return 0;
1463                 }
1464
1465                 cf_log_info(cs, "\tvirtual_server = %s", host);
1466
1467                 if (!old_server_add(rc, cs, r->name, host, "", ldflag,
1468                                     &r->auth_pool, HOME_TYPE_AUTH, host)) {
1469                         return 0;
1470                 }
1471                 if (!old_server_add(rc, cs, r->name, host, "", ldflag,
1472                                     &r->acct_pool, HOME_TYPE_ACCT, host)) {
1473                         return 0;
1474                 }
1475         }
1476
1477         if (secret) cf_log_info(cs, "\tsecret = %s", secret);
1478
1479         return 1;
1480
1481 }
1482
1483
1484 #ifdef WITH_PROXY
1485 static int add_pool_to_realm(realm_config_t *rc, CONF_SECTION *cs,
1486                              const char *name, home_pool_t **dest,
1487                              int server_type, int do_print)
1488 {
1489         home_pool_t mypool, *pool;
1490
1491         mypool.name = name;
1492         mypool.server_type = server_type;
1493
1494         pool = rbtree_finddata(home_pools_byname, &mypool);
1495         if (!pool) {
1496                 CONF_SECTION *pool_cs;
1497
1498                 pool_cs = cf_section_sub_find_name2(rc->cs,
1499                                                     "home_server_pool",
1500                                                     name);
1501                 if (!pool_cs) {
1502                         pool_cs = cf_section_sub_find_name2(rc->cs,
1503                                                             "server_pool",
1504                                                             name);
1505                 }
1506                 if (!pool_cs) {
1507                         cf_log_err(cf_sectiontoitem(cs), "Failed to find home_server_pool \"%s\"", name);
1508                         return 0;
1509                 }
1510
1511                 if (!server_pool_add(rc, pool_cs, server_type, do_print)) {
1512                         return 0;
1513                 }
1514
1515                 pool = rbtree_finddata(home_pools_byname, &mypool);
1516                 if (!pool) {
1517                         radlog(L_ERR, "Internal sanity check failed in add_pool_to_realm");
1518                         return 0;
1519                 }
1520         }
1521
1522         if (pool->server_type != server_type) {
1523                 cf_log_err(cf_sectiontoitem(cs), "Incompatible home_server_pool \"%s\" (mixed auth_pool / acct_pool)", name);
1524                 return 0;
1525         }
1526
1527         *dest = pool;
1528
1529         return 1;
1530 }
1531 #endif
1532
1533
1534 static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
1535 {
1536         const char *name2;
1537         REALM *r = NULL;
1538         CONF_PAIR *cp;
1539 #ifdef WITH_PROXY
1540         home_pool_t *auth_pool, *acct_pool;
1541         const char *auth_pool_name, *acct_pool_name;
1542 #ifdef WITH_COA
1543         const char *coa_pool_name;
1544         home_pool_t *coa_pool;
1545 #endif
1546 #endif
1547
1548         name2 = cf_section_name1(cs);
1549         if (!name2 || (strcasecmp(name2, "realm") != 0)) {
1550                 cf_log_err(cf_sectiontoitem(cs), "Section is not a realm.");
1551                 return 0;
1552         }
1553
1554         name2 = cf_section_name2(cs);
1555         if (!name2) {
1556                 cf_log_err(cf_sectiontoitem(cs), "Realm section is missing the realm name.");
1557                 return 0;
1558         }
1559
1560 #ifdef WITH_PROXY
1561         auth_pool = acct_pool = NULL;
1562         auth_pool_name = acct_pool_name = NULL;
1563 #ifdef WITH_COA
1564         coa_pool = NULL;
1565         coa_pool_name = NULL;
1566 #endif
1567
1568         /*
1569          *      Prefer new configuration to old one.
1570          */
1571         cp = cf_pair_find(cs, "pool");
1572         if (!cp) cp = cf_pair_find(cs, "home_server_pool");
1573         if (cp) auth_pool_name = cf_pair_value(cp);
1574         if (cp && auth_pool_name) {
1575                 acct_pool_name = auth_pool_name;
1576                 if (!add_pool_to_realm(rc, cs,
1577                                        auth_pool_name, &auth_pool,
1578                                        HOME_TYPE_AUTH, 1)) {
1579                         return 0;
1580                 }
1581                 if (!add_pool_to_realm(rc, cs,
1582                                        auth_pool_name, &acct_pool,
1583                                        HOME_TYPE_ACCT, 0)) {
1584                         return 0;
1585                 }
1586         }
1587
1588         cp = cf_pair_find(cs, "auth_pool");
1589         if (cp) auth_pool_name = cf_pair_value(cp);
1590         if (cp && auth_pool_name) {
1591                 if (auth_pool) {
1592                         cf_log_err(cf_sectiontoitem(cs), "Cannot use \"pool\" and \"auth_pool\" at the same time.");
1593                         return 0;
1594                 }
1595                 if (!add_pool_to_realm(rc, cs,
1596                                        auth_pool_name, &auth_pool,
1597                                        HOME_TYPE_AUTH, 1)) {
1598                         return 0;
1599                 }
1600         }
1601
1602         cp = cf_pair_find(cs, "acct_pool");
1603         if (cp) acct_pool_name = cf_pair_value(cp);
1604         if (cp && acct_pool_name) {
1605                 int do_print = TRUE;
1606
1607                 if (acct_pool) {
1608                         cf_log_err(cf_sectiontoitem(cs), "Cannot use \"pool\" and \"acct_pool\" at the same time.");
1609                         return 0;
1610                 }
1611
1612                 if (!auth_pool ||
1613                     (auth_pool_name &&
1614                      (strcmp(auth_pool_name, acct_pool_name) != 0))) {
1615                         do_print = TRUE;
1616                 }
1617
1618                 if (!add_pool_to_realm(rc, cs,
1619                                        acct_pool_name, &acct_pool,
1620                                        HOME_TYPE_ACCT, do_print)) {
1621                         return 0;
1622                 }
1623         }
1624
1625 #ifdef WITH_COA
1626         cp = cf_pair_find(cs, "coa_pool");
1627         if (cp) coa_pool_name = cf_pair_value(cp);
1628         if (cp && coa_pool_name) {
1629                 int do_print = TRUE;
1630
1631                 if (!add_pool_to_realm(rc, cs,
1632                                        coa_pool_name, &coa_pool,
1633                                        HOME_TYPE_COA, do_print)) {
1634                         return 0;
1635                 }
1636         }
1637 #endif
1638 #endif
1639
1640         cf_log_info(cs, " realm %s {", name2);
1641
1642 #ifdef WITH_PROXY
1643         /*
1644          *      The realm MAY already exist if it's an old-style realm.
1645          *      In that case, merge the old-style realm with this one.
1646          */
1647         r = realm_find2(name2);
1648         if (r && (strcmp(r->name, name2) == 0)) {
1649                 if (cf_pair_find(cs, "auth_pool") ||
1650                     cf_pair_find(cs, "acct_pool")) {
1651                         cf_log_err(cf_sectiontoitem(cs), "Duplicate realm \"%s\"", name2);
1652                         goto error;
1653                 }
1654
1655                 if (!old_realm_config(rc, cs, r)) {
1656                         goto error;
1657                 }
1658
1659                 cf_log_info(cs, " } # realm %s", name2);
1660                 return 1;
1661         }
1662 #endif
1663
1664 #ifdef HAVE_REGEX_H
1665         if (name2[0] == '~') {
1666                 int rcode;
1667                 regex_t reg;
1668
1669                 /*
1670                  *      Include substring matches.
1671                  */
1672                 rcode = regcomp(&reg, name2 + 1,
1673                                 REG_EXTENDED | REG_NOSUB | REG_ICASE);
1674                 if (rcode != 0) {
1675                         char buffer[256];
1676
1677                         regerror(rcode, &reg, buffer, sizeof(buffer));
1678
1679                         cf_log_err(cf_sectiontoitem(cs),
1680                                    "Invalid regex \"%s\": %s",
1681                                    name2 + 1, buffer);
1682                         goto error;
1683                 }
1684                 regfree(&reg);
1685         }
1686 #endif
1687
1688         r = rad_malloc(sizeof(*r));
1689         memset(r, 0, sizeof(*r));
1690
1691         r->name = name2;
1692         r->striprealm = 1;
1693 #ifdef WITH_PROXY
1694         r->auth_pool = auth_pool;
1695         r->acct_pool = acct_pool;
1696 #ifdef WITH_COA
1697         r->coa_pool = coa_pool;
1698 #endif
1699
1700         if (auth_pool_name &&
1701             (auth_pool_name == acct_pool_name)) { /* yes, ptr comparison */
1702                 cf_log_info(cs, "\tpool = %s", auth_pool_name);
1703         } else {
1704                 if (auth_pool_name) cf_log_info(cs, "\tauth_pool = %s", auth_pool_name);
1705                 if (acct_pool_name) cf_log_info(cs, "\tacct_pool = %s", acct_pool_name);
1706 #ifdef WITH_COA
1707                 if (coa_pool_name) cf_log_info(cs, "\tcoa_pool = %s", coa_pool_name);
1708 #endif
1709         }
1710 #endif
1711
1712         cp = cf_pair_find(cs, "nostrip");
1713         if (cp && (cf_pair_value(cp) == NULL)) {
1714                 r->striprealm = 0;
1715                 cf_log_info(cs, "\tnostrip");
1716         }
1717
1718         /*
1719          *      We're a new-style realm.  Complain if we see the old
1720          *      directives.
1721          */
1722         if (r->auth_pool || r->acct_pool) {
1723                 if (((cp = cf_pair_find(cs, "authhost")) != NULL) ||
1724                     ((cp = cf_pair_find(cs, "accthost")) != NULL) ||
1725                     ((cp = cf_pair_find(cs, "secret")) != NULL) ||
1726                     ((cp = cf_pair_find(cs, "ldflag")) != NULL)) {
1727                         DEBUG2W("Ignoring old-style configuration entry \"%s\" in realm \"%s\"", cf_pair_attr(cp), r->name);
1728                 }
1729
1730
1731                 /*
1732                  *      The realm MAY be an old-style realm, as there
1733                  *      was no auth_pool or acct_pool.  Double-check
1734                  *      it, just to be safe.
1735                  */
1736         } else if (!old_realm_config(rc, cs, r)) {
1737                 goto error;
1738         }
1739
1740 #ifdef HAVE_REGEX_H
1741         /*
1742          *      It's a regex.  Add it to a separate list.
1743          */
1744         if (name2[0] == '~') {
1745                 realm_regex_t *rr, **last;
1746
1747                 rr = rad_malloc(sizeof(*rr));
1748
1749                 last = &realms_regex;
1750                 while (*last) last = &((*last)->next);  /* O(N^2)... sue me. */
1751
1752                 r->name = name2;
1753                 rr->realm = r;
1754                 rr->next = NULL;
1755
1756                 *last = rr;
1757
1758                 cf_log_info(cs, " }");
1759                 return 1;
1760         }
1761 #endif
1762
1763         if (!rbtree_insert(realms_byname, r)) {
1764                 rad_assert("Internal sanity check failed");
1765                 goto error;
1766         }
1767
1768         cf_log_info(cs, " }");
1769
1770         return 1;
1771
1772  error:
1773         cf_log_info(cs, " } # realm %s", name2);
1774         free(r);
1775         return 0;
1776 }
1777
1778 #ifdef WITH_COA
1779 static const FR_NAME_NUMBER home_server_types[] = {
1780         { "auth", HOME_TYPE_AUTH },
1781         { "auth+acct", HOME_TYPE_AUTH },
1782         { "acct", HOME_TYPE_ACCT },
1783         { "coa", HOME_TYPE_COA },
1784         { NULL, 0 }
1785 };
1786
1787 static int pool_peek_type(CONF_SECTION *config, CONF_SECTION *cs)
1788 {
1789         int home;
1790         const char *name, *type;
1791         CONF_PAIR *cp;
1792         CONF_SECTION *server_cs;
1793
1794         cp = cf_pair_find(cs, "home_server");
1795         if (!cp) {
1796                 cf_log_err(cf_sectiontoitem(cs), "Pool does not contain a \"home_server\" entry");
1797                 return HOME_TYPE_INVALID;
1798         }
1799
1800         name = cf_pair_value(cp);
1801         if (!name) {
1802                 cf_log_err(cf_pairtoitem(cp), "home_server entry does not reference a home server");
1803                 return HOME_TYPE_INVALID;
1804         }
1805
1806         server_cs = cf_section_sub_find_name2(config, "home_server", name);
1807         if (!server_cs) {
1808                 cf_log_err(cf_pairtoitem(cp), "home_server \"%s\" does not exist", name);
1809                 return HOME_TYPE_INVALID;
1810         }
1811
1812         cp = cf_pair_find(server_cs, "type");
1813         if (!cp) {
1814                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s does not contain a \"type\" entry", name);
1815                 return HOME_TYPE_INVALID;
1816         }
1817
1818         type = cf_pair_value(cp);
1819         if (!type) {
1820                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an empty \"type\" entry", name);
1821                 return HOME_TYPE_INVALID;
1822         }
1823
1824         home = fr_str2int(home_server_types, type, HOME_TYPE_INVALID);
1825         if (home == HOME_TYPE_INVALID) {
1826                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an invalid \"type\" entry of value \"%s\"", name, type);
1827                 return HOME_TYPE_INVALID;
1828         }
1829
1830         return home;            /* 'cause we miss it so much */
1831 }
1832 #endif
1833
1834 int realms_init(CONF_SECTION *config)
1835 {
1836         CONF_SECTION *cs;
1837 #ifdef WITH_PROXY
1838         CONF_SECTION *server_cs;
1839 #endif
1840         realm_config_t *rc, *old_rc;
1841
1842         if (realms_byname) return 1;
1843
1844         realms_byname = rbtree_create(realm_name_cmp, free, 0);
1845         if (!realms_byname) {
1846                 realms_free();
1847                 return 0;
1848         }
1849
1850 #ifdef WITH_PROXY
1851         home_servers_byaddr = rbtree_create(home_server_addr_cmp, home_server_free, 0);
1852         if (!home_servers_byaddr) {
1853                 realms_free();
1854                 return 0;
1855         }
1856
1857         home_servers_byname = rbtree_create(home_server_name_cmp, NULL, 0);
1858         if (!home_servers_byname) {
1859                 realms_free();
1860                 return 0;
1861         }
1862
1863 #ifdef WITH_STATS
1864         home_servers_bynumber = rbtree_create(home_server_number_cmp, NULL, 0);
1865         if (!home_servers_bynumber) {
1866                 realms_free();
1867                 return 0;
1868         }
1869 #endif
1870
1871         home_pools_byname = rbtree_create(home_pool_name_cmp, NULL, 0);
1872         if (!home_pools_byname) {
1873                 realms_free();
1874                 return 0;
1875         }
1876 #endif
1877
1878         rc = rad_malloc(sizeof(*rc));
1879         memset(rc, 0, sizeof(*rc));
1880         rc->cs = config;
1881
1882 #ifdef WITH_PROXY
1883         cs = cf_subsection_find_next(config, NULL, "proxy");
1884         if (cs) {
1885                 if (cf_section_parse(cs, rc, proxy_config) < 0) {
1886                         radlog(L_ERR, "Failed parsing proxy section");
1887
1888                         free(rc);
1889                         realms_free();
1890                         return 0;
1891                 }
1892         } else {
1893                 rc->dead_time = DEAD_TIME;
1894                 rc->retry_count = RETRY_COUNT;
1895                 rc->retry_delay = RETRY_DELAY;
1896                 rc->fallback = 0;
1897                 rc->wake_all_if_all_dead= 0;
1898         }
1899
1900         for (cs = cf_subsection_find_next(config, NULL, "home_server");
1901              cs != NULL;
1902              cs = cf_subsection_find_next(config, cs, "home_server")) {
1903                 if (!home_server_add(rc, cs)) {
1904                         free(rc);
1905                         realms_free();
1906                         return 0;
1907                 }
1908         }
1909
1910         /*
1911          *      Loop over virtual servers to find homes which are
1912          *      defined in them.
1913          */
1914         for (server_cs = cf_subsection_find_next(config, NULL, "server");
1915              server_cs != NULL;
1916              server_cs = cf_subsection_find_next(config, server_cs, "server")) {
1917                 for (cs = cf_subsection_find_next(server_cs, NULL, "home_server");
1918                      cs != NULL;
1919                      cs = cf_subsection_find_next(server_cs, cs, "home_server")) {
1920                         if (!home_server_add(rc, cs)) {
1921                                 free(rc);
1922                                 realms_free();
1923                                 return 0;
1924                         }
1925                 }
1926         }
1927 #endif
1928
1929         for (cs = cf_subsection_find_next(config, NULL, "realm");
1930              cs != NULL;
1931              cs = cf_subsection_find_next(config, cs, "realm")) {
1932                 if (!realm_add(rc, cs)) {
1933                         free(rc);
1934                         realms_free();
1935                         return 0;
1936                 }
1937         }
1938
1939 #ifdef WITH_COA
1940         /*
1941          *      CoA pools aren't necessarily tied to realms.
1942          */
1943         for (cs = cf_subsection_find_next(config, NULL, "home_server_pool");
1944              cs != NULL;
1945              cs = cf_subsection_find_next(config, cs, "home_server_pool")) {
1946                 int type;
1947
1948                 /*
1949                  *      Pool was already loaded.
1950                  */
1951                 if (cf_data_find(cs, "home_server_pool")) continue;
1952
1953                 type = pool_peek_type(config, cs);
1954                 if (type == HOME_TYPE_INVALID) {
1955                         free(rc);
1956                         realms_free();
1957                         return 0;
1958                 }
1959
1960                 if (!server_pool_add(rc, cs, type, TRUE)) {
1961                         free(rc);
1962                         realms_free();
1963                         return 0;
1964                 }
1965         }
1966 #endif
1967
1968
1969 #ifdef WITH_PROXY
1970         xlat_register("home_server", xlat_home_server, NULL);
1971         xlat_register("home_server_pool", xlat_server_pool, NULL);
1972 #endif
1973
1974         /*
1975          *      Swap pointers atomically.
1976          */
1977         old_rc = realm_config;
1978         realm_config = rc;
1979         free(old_rc);
1980
1981         return 1;
1982 }
1983
1984 /*
1985  *      Find a realm where "name" might be the regex.
1986  */
1987 REALM *realm_find2(const char *name)
1988 {
1989         REALM myrealm;
1990         REALM *realm;
1991
1992         if (!name) name = "NULL";
1993
1994         myrealm.name = name;
1995         realm = rbtree_finddata(realms_byname, &myrealm);
1996         if (realm) return realm;
1997
1998 #ifdef HAVE_REGEX_H
1999         if (realms_regex) {
2000                 realm_regex_t *this;
2001
2002                 for (this = realms_regex; this != NULL; this = this->next) {
2003                         if (strcmp(this->realm->name, name) == 0) {
2004                                 return this->realm;
2005                         }
2006                 }
2007         }
2008 #endif
2009
2010         /*
2011          *      Couldn't find a realm.  Look for DEFAULT.
2012          */
2013         myrealm.name = "DEFAULT";
2014         return rbtree_finddata(realms_byname, &myrealm);
2015 }
2016
2017
2018 /*
2019  *      Find a realm in the REALM list.
2020  */
2021 REALM *realm_find(const char *name)
2022 {
2023         REALM myrealm;
2024         REALM *realm;
2025
2026         if (!name) name = "NULL";
2027
2028         myrealm.name = name;
2029         realm = rbtree_finddata(realms_byname, &myrealm);
2030         if (realm) return realm;
2031
2032 #ifdef HAVE_REGEX_H
2033         if (realms_regex) {
2034                 realm_regex_t *this;
2035
2036                 for (this = realms_regex; this != NULL; this = this->next) {
2037                         int compare;
2038                         regex_t reg;
2039
2040                         /*
2041                          *      Include substring matches.
2042                          */
2043                         if (regcomp(&reg, this->realm->name + 1,
2044                                     REG_EXTENDED | REG_NOSUB | REG_ICASE) != 0) {
2045                                 continue;
2046                         }
2047
2048                         compare = regexec(&reg, name, 0, NULL, 0);
2049                         regfree(&reg);
2050
2051                         if (compare == 0) return this->realm;
2052                 }
2053         }
2054 #endif
2055
2056         /*
2057          *      Couldn't find a realm.  Look for DEFAULT.
2058          */
2059         myrealm.name = "DEFAULT";
2060         return rbtree_finddata(realms_byname, &myrealm);
2061 }
2062
2063
2064 #ifdef WITH_PROXY
2065
2066 /*
2067  *      Allocate the proxy list if it doesn't already exist, and copy request
2068  *      VPs into it. Setup src/dst IP addresses based on home server, and
2069  *      calculate and add the message-authenticator.
2070  *
2071  *      This is a distinct function from home_server_ldb, as not all home_server
2072  *      lookups result in the *CURRENT* request being proxied,
2073  *      as in rlm_replicate, and this may trigger asserts elsewhere in the
2074  *      server.
2075  */
2076 void home_server_update_request(home_server *home, REQUEST *request)
2077 {
2078
2079         /*
2080          *      Allocate the proxy packet, only if it wasn't
2081          *      already allocated by a module.  This check is
2082          *      mainly to support the proxying of EAP-TTLS and
2083          *      EAP-PEAP tunneled requests.
2084          *
2085          *      In those cases, the EAP module creates a
2086          *      "fake" request, and recursively passes it
2087          *      through the authentication stage of the
2088          *      server.  The module then checks if the request
2089          *      was supposed to be proxied, and if so, creates
2090          *      a proxy packet from the TUNNELED request, and
2091          *      not from the EAP request outside of the
2092          *      tunnel.
2093          *
2094          *      The proxy then works like normal, except that
2095          *      the response packet is "eaten" by the EAP
2096          *      module, and encapsulated into an EAP packet.
2097          */
2098         if (!request->proxy) {
2099                 request->proxy = rad_alloc(request, TRUE);
2100                 if (!request->proxy) {
2101                         radlog(L_ERR, "no memory");
2102                         exit(1);
2103                 }
2104
2105                 /*
2106                  *      Copy the request, then look up name
2107                  *      and plain-text password in the copy.
2108                  *
2109                  *      Note that the User-Name attribute is
2110                  *      the *original* as sent over by the
2111                  *      client.  The Stripped-User-Name
2112                  *      attribute is the one hacked through
2113                  *      the 'hints' file.
2114                  */
2115                 request->proxy->vps =  paircopy(request->packet->vps);
2116         }
2117
2118         /*
2119          *      Update the various fields as appropriate.
2120          */
2121         request->proxy->src_ipaddr = home->src_ipaddr;
2122         request->proxy->src_port = 0;
2123         request->proxy->dst_ipaddr = home->ipaddr;
2124         request->proxy->dst_port = home->port;
2125         request->home_server = home;
2126
2127         /*
2128          *      Access-Requests have a Message-Authenticator added,
2129          *      unless one already exists.
2130          */
2131         if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2132             !pairfind(request->proxy->vps, PW_MESSAGE_AUTHENTICATOR, 0, TAG_ANY)) {
2133                 radius_pairmake(request, &request->proxy->vps,
2134                                 "Message-Authenticator", "0x00",
2135                                 T_OP_SET);
2136         }
2137 }
2138
2139 home_server *home_server_ldb(const char *realmname,
2140                              home_pool_t *pool, REQUEST *request)
2141 {
2142         int             start;
2143         int             count;
2144         home_server     *found = NULL;
2145         home_server     *zombie = NULL;
2146         VALUE_PAIR      *vp;
2147
2148         /*
2149          *      Determine how to pick choose the home server.
2150          */
2151         switch (pool->type) {
2152                 uint32_t hash;
2153
2154                 /*
2155                  *      For load-balancing by client IP address, we
2156                  *      pick a home server by hashing the client IP.
2157                  *
2158                  *      This isn't as even a load distribution as
2159                  *      tracking the State attribute, but it's better
2160                  *      than nothing.
2161                  */
2162         case HOME_POOL_CLIENT_BALANCE:
2163                 switch (request->packet->src_ipaddr.af) {
2164                 case AF_INET:
2165                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip4addr,
2166                                          sizeof(request->packet->src_ipaddr.ipaddr.ip4addr));
2167                         break;
2168                 case AF_INET6:
2169                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip6addr,
2170                                          sizeof(request->packet->src_ipaddr.ipaddr.ip6addr));
2171                         break;
2172                 default:
2173                         hash = 0;
2174                         break;
2175                 }
2176                 start = hash % pool->num_home_servers;
2177                 break;
2178
2179         case HOME_POOL_CLIENT_PORT_BALANCE:
2180                 switch (request->packet->src_ipaddr.af) {
2181                 case AF_INET:
2182                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip4addr,
2183                                          sizeof(request->packet->src_ipaddr.ipaddr.ip4addr));
2184                         break;
2185                 case AF_INET6:
2186                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip6addr,
2187                                          sizeof(request->packet->src_ipaddr.ipaddr.ip6addr));
2188                         break;
2189                 default:
2190                         hash = 0;
2191                         break;
2192                 }
2193                 fr_hash_update(&request->packet->src_port,
2194                                  sizeof(request->packet->src_port), hash);
2195                 start = hash % pool->num_home_servers;
2196                 break;
2197
2198         case HOME_POOL_KEYED_BALANCE:
2199                 if ((vp = pairfind(request->config_items, PW_LOAD_BALANCE_KEY, 0, TAG_ANY)) != NULL) {
2200                         hash = fr_hash(vp->vp_strvalue, vp->length);
2201                         start = hash % pool->num_home_servers;
2202                         break;
2203                 }
2204                 /* FALL-THROUGH */
2205
2206         case HOME_POOL_LOAD_BALANCE:
2207         case HOME_POOL_FAIL_OVER:
2208                 start = 0;
2209                 break;
2210
2211         default:                /* this shouldn't happen... */
2212                 start = 0;
2213                 break;
2214
2215         }
2216
2217         /*
2218          *      Starting with the home server we chose, loop through
2219          *      all home servers.  If the current one is dead, skip
2220          *      it.  If it is too busy, skip it.
2221          *
2222          *      Otherwise, use it.
2223          */
2224         for (count = 0; count < pool->num_home_servers; count++) {
2225                 home_server *home = pool->servers[(start + count) % pool->num_home_servers];
2226
2227                 if (!home) continue;
2228
2229                 /*
2230                  *      Skip dead home servers.
2231                  *
2232                  *      Home servers that are unknown, alive, or zombie
2233                  *      are used for proxying.
2234                  */
2235                 if (home->state == HOME_STATE_IS_DEAD) {
2236                         continue;
2237                 }
2238
2239                 /*
2240                  *      This home server is too busy.  Choose another one.
2241                  */
2242                 if (home->currently_outstanding >= home->max_outstanding) {
2243                         continue;
2244                 }
2245
2246 #ifdef WITH_DETAIL
2247                 /*
2248                  *      We read the packet from a detail file, AND it
2249                  *      came from this server.  Don't re-proxy it
2250                  *      there.
2251                  */
2252                 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
2253                     (request->packet->code == PW_ACCOUNTING_REQUEST) &&
2254                     (fr_ipaddr_cmp(&home->ipaddr, &request->packet->src_ipaddr) == 0)) {
2255                         continue;
2256                 }
2257 #endif
2258
2259                 /*
2260                  *      Default virtual: ignore homes tied to a
2261                  *      virtual.
2262                  */
2263                 if (!request->server && home->parent_server) {
2264                         continue;
2265                 }
2266
2267                 /*
2268                  *      A virtual AND home is tied to virtual,
2269                  *      ignore ones which don't match.
2270                  */
2271                 if (request->server && home->parent_server &&
2272                     strcmp(request->server, home->parent_server) != 0) {
2273                         continue;
2274                 }
2275
2276                 /*
2277                  *      Allow request->server && !home->parent_server
2278                  *
2279                  *      i.e. virtuals can proxy to globally defined
2280                  *      homes.
2281                  */
2282
2283                 /*
2284                  *      It's zombie, so we remember the first zombie
2285                  *      we find, but we don't mark it as a "live"
2286                  *      server.
2287                  */
2288                 if (home->state == HOME_STATE_ZOMBIE) {
2289                         if (!zombie) zombie = home;
2290                         continue;
2291                 }
2292
2293                 /*
2294                  *      We've found the first "live" one.  Use that.
2295                  */
2296                 if (pool->type != HOME_POOL_LOAD_BALANCE) {
2297                         found = home;
2298                         break;
2299                 }
2300
2301                 /*
2302                  *      Otherwise we're doing some kind of load balancing.
2303                  *      If we haven't found one yet, pick this one.
2304                  */
2305                 if (!found) {
2306                         found = home;
2307                         continue;
2308                 }
2309
2310                 RDEBUG3("PROXY %s %d\t%s %d",
2311                        found->name, found->currently_outstanding,
2312                        home->name, home->currently_outstanding);
2313
2314                 /*
2315                  *      Prefer this server if it's less busy than the
2316                  *      one we had previously found.
2317                  */
2318                 if (home->currently_outstanding < found->currently_outstanding) {
2319                         RDEBUG3("PROXY Choosing %s: It's less busy than %s",
2320                                home->name, found->name);
2321                         found = home;
2322                         continue;
2323                 }
2324
2325                 /*
2326                  *      Ignore servers which are busier than the one
2327                  *      we found.
2328                  */
2329                 if (home->currently_outstanding > found->currently_outstanding) {
2330                         RDEBUG3("PROXY Skipping %s: It's busier than %s",
2331                                home->name, found->name);
2332                         continue;
2333                 }
2334
2335                 /*
2336                  *      From the list of servers which have the same
2337                  *      load, choose one at random.
2338                  */
2339                 if (((count + 1) * (fr_rand() & 0xffff)) < (uint32_t) 0x10000) {
2340                         found = home;
2341                 }
2342         } /* loop over the home servers */
2343
2344         /*
2345          *      We have no live servers, BUT we have a zombie.  Use
2346          *      the zombie as a last resort.
2347          */
2348         if (!found && zombie) {
2349                 found = zombie;
2350                 zombie = NULL;
2351         }
2352
2353         /*
2354          *      There's a fallback if they're all dead.
2355          */
2356         if (!found && pool->fallback) {
2357                 found = pool->fallback;
2358
2359                 DEBUGW("Home server pool %s failing over to fallback %s",
2360                       pool->name, found->server);
2361                 if (pool->in_fallback) goto update_and_return;
2362
2363                 pool->in_fallback = TRUE;
2364
2365                 /*
2366                  *      Run the trigger once an hour saying that
2367                  *      they're all dead.
2368                  */
2369                 if ((pool->time_all_dead + 3600) < request->timestamp) {
2370                         pool->time_all_dead = request->timestamp;
2371                         exec_trigger(request, pool->cs, "home_server_pool.fallback", FALSE);
2372                 }
2373         }
2374
2375         if (found) {
2376         update_and_return:
2377                 if ((found != pool->fallback) && pool->in_fallback) {
2378                         pool->in_fallback = FALSE;
2379                         exec_trigger(request, pool->cs, "home_server_pool.normal", FALSE);
2380                 }
2381
2382                 return found;
2383         }
2384
2385         /*
2386          *      No live match found, and no fallback to the "DEFAULT"
2387          *      realm.  We fix this by blindly marking all servers as
2388          *      "live".  But only do it for ones that don't support
2389          *      "pings", as they will be marked live when they
2390          *      actually are live.
2391          */
2392         if (!realm_config->fallback &&
2393             realm_config->wake_all_if_all_dead) {
2394                 for (count = 0; count < pool->num_home_servers; count++) {
2395                         home_server *home = pool->servers[count];
2396
2397                         if (!home) continue;
2398
2399                         if ((home->state == HOME_STATE_IS_DEAD) &&
2400                             (home->ping_check == HOME_PING_CHECK_NONE)) {
2401                                 home->state = HOME_STATE_ALIVE;
2402                                 if (!found) found = home;
2403                         }
2404                 }
2405
2406                 if (found) goto update_and_return;
2407         }
2408
2409         /*
2410          *      Still nothing.  Look up the DEFAULT realm, but only
2411          *      if we weren't looking up the NULL or DEFAULT realms.
2412          */
2413         if (realm_config->fallback &&
2414             realmname &&
2415             (strcmp(realmname, "NULL") != 0) &&
2416             (strcmp(realmname, "DEFAULT") != 0)) {
2417                 REALM *rd = realm_find("DEFAULT");
2418
2419                 if (!rd) return NULL;
2420
2421                 pool = NULL;
2422                 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2423                         pool = rd->auth_pool;
2424
2425                 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2426                         pool = rd->acct_pool;
2427                 }
2428                 if (!pool) return NULL;
2429
2430                 RDEBUG2("PROXY - realm %s has no live home servers.  Falling back to the DEFAULT realm.", realmname);
2431                 return home_server_ldb(rd->name, pool, request);
2432         }
2433
2434         /*
2435          *      Still haven't found anything.  Oh well.
2436          */
2437         return NULL;
2438 }
2439
2440
2441 home_server *home_server_find(fr_ipaddr_t *ipaddr, int port, int proto)
2442 {
2443         home_server myhome;
2444
2445         memset(&myhome, 0, sizeof(myhome));
2446         myhome.ipaddr = *ipaddr;
2447         myhome.src_ipaddr.af = ipaddr->af;
2448         myhome.port = port;
2449 #ifdef WITH_TCP
2450         myhome.proto = proto;
2451 #else
2452         myhome.proto = IPPROTO_UDP;
2453 #endif
2454         myhome.server = NULL;   /* we're not called for internal proxying */
2455
2456         return rbtree_finddata(home_servers_byaddr, &myhome);
2457 }
2458
2459 #ifdef WITH_COA
2460 home_server *home_server_byname(const char *name, int type)
2461 {
2462         home_server myhome;
2463
2464         memset(&myhome, 0, sizeof(myhome));
2465         myhome.type = type;
2466         myhome.name = name;
2467
2468         return rbtree_finddata(home_servers_byname, &myhome);
2469 }
2470 #endif
2471
2472 #ifdef WITH_STATS
2473 home_server *home_server_bynumber(int number)
2474 {
2475         home_server myhome;
2476
2477         memset(&myhome, 0, sizeof(myhome));
2478         myhome.number = number;
2479         myhome.server = NULL;   /* we're not called for internal proxying */
2480
2481         return rbtree_finddata(home_servers_bynumber, &myhome);
2482 }
2483 #endif
2484
2485 home_pool_t *home_pool_byname(const char *name, int type)
2486 {
2487         home_pool_t mypool;
2488
2489         memset(&mypool, 0, sizeof(mypool));
2490         mypool.name = name;
2491         mypool.server_type = type;
2492         return rbtree_finddata(home_pools_byname, &mypool);
2493 }
2494
2495 #endif