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         { "require_message_authenticator",  PW_TYPE_BOOLEAN,
 374           offsetof(home_server, message_authenticator), 0, NULL },
 375
 376         { "zombie_period", PW_TYPE_INTEGER,
 377           offsetof(home_server,zombie_period), NULL,   "40" },
 378         { "status_check", PW_TYPE_STRING_PTR,
 379           0, &hs_check,   "none" },
 380         { "ping_check", PW_TYPE_STRING_PTR,
 381           0, &hs_check,   NULL },
 382
 383         { "ping_interval", PW_TYPE_INTEGER,
 384           offsetof(home_server,ping_interval), NULL,   "30" },
 385         { "check_interval", PW_TYPE_INTEGER,
 386           offsetof(home_server,ping_interval), NULL,   "30" },
 387         { "num_answers_to_alive", PW_TYPE_INTEGER,
 388           offsetof(home_server,num_pings_to_alive), NULL,   "3" },
 389         { "revive_interval", PW_TYPE_INTEGER,
 390           offsetof(home_server,revive_interval), NULL,   "300" },
 391         { "status_check_timeout", PW_TYPE_INTEGER,
 392           offsetof(home_server,ping_timeout), NULL,   "4" },
 393
 394         { "username",  PW_TYPE_STRING_PTR,
 395           offsetof(home_server,ping_user_name), NULL,  NULL},
 396         { "password",  PW_TYPE_STRING_PTR,
 397           offsetof(home_server,ping_user_password), NULL,  NULL},
 398
 399 #ifdef WITH_STATS
 400         { "historic_average_window", PW_TYPE_INTEGER,
 401           offsetof(home_server,ema.window), NULL,  NULL },
 402 #endif
 403
 404 #ifdef WITH_COA
 405         {  "coa", PW_TYPE_SUBSECTION, 0, NULL, (const void *) home_server_coa },
 406 #endif
 407
 408         { "limit", PW_TYPE_SUBSECTION, 0, NULL, (const void *) limit_config },
 409
 410         { NULL, -1, 0, NULL, NULL }             /* end the list */
 411 };
 412
 413
 414 static void null_free(UNUSED void *data)
 415 {
 416 }
 417
 418
 419 int realms_home_server_add(home_server *home, CONF_SECTION *cs, int dual)
 420 {
 421         CONF_SECTION *parent = NULL;
 422         const char * name2 = home->name;
 423
 424         /*
 425          *      Make sure that this is set.
 426          */
 427         if (home->src_ipaddr.af == AF_UNSPEC) {
 428                 home->src_ipaddr.af = home->ipaddr.af;
 429         }
 430
 431         free(hs_srcipaddr);
 432         hs_srcipaddr = NULL;
 433
 434         if (rbtree_finddata(home_servers_byname, home) != NULL) {
 435                 cf_log_err(cf_sectiontoitem(cs),
 436                            "Duplicate home server name %s.", name2);
 437                 goto error;
 438         }
 439
 440         if (!home->server &&
 441             (rbtree_finddata(home_servers_byaddr, home) != NULL)) {
 442                 cf_log_err(cf_sectiontoitem(cs),
 443                            "Duplicate home server IP %s.", name2);
 444                 goto error;
 445         }
 446
 447         if (!rbtree_insert(home_servers_byname, home)) {
 448                 cf_log_err(cf_sectiontoitem(cs),
 449                            "Internal error %d adding home server %s.",
 450                            __LINE__, name2);
 451                 goto error;
 452         }
 453
 454         if (!home->server &&
 455             !rbtree_insert(home_servers_byaddr, home)) {
 456                 rbtree_deletebydata(home_servers_byname, home);
 457                 cf_log_err(cf_sectiontoitem(cs),
 458                            "Internal error %d adding home server %s.",
 459                            __LINE__, name2);
 460                 goto error;
 461         }
 462
 463 #ifdef WITH_STATS
 464         home->number = home_server_max_number++;
 465         if (!rbtree_insert(home_servers_bynumber, home)) {
 466                 rbtree_deletebydata(home_servers_byname, home);
 467                 if (home->ipaddr.af != AF_UNSPEC) {
 468                         rbtree_deletebydata(home_servers_byname, home);
 469                 }
 470                 cf_log_err(cf_sectiontoitem(cs),
 471                            "Internal error %d adding home server %s.",
 472                            __LINE__, name2);
 473                 goto error;
 474         }
 475 #endif
 476
 477         if (home->max_outstanding < 8) home->max_outstanding = 8;
 478         if (home->max_outstanding > 65536*16) home->max_outstanding = 65536*16;
 479
 480         if (home->ping_interval < 6) home->ping_interval = 6;
 481         if (home->ping_interval > 120) home->ping_interval = 120;
 482
 483         if (home->response_window < 1) home->response_window = 1;
 484         if (home->response_window > 60) home->response_window = 60;
 485         if (home->response_window > mainconfig.max_request_time) home->response_window = mainconfig.max_request_time;
 486
 487         if (home->zombie_period < 1) home->zombie_period = 1;
 488         if (home->zombie_period > 120) home->zombie_period = 120;
 489
 490         if (home->zombie_period < home->response_window) {
 491                 home->zombie_period = home->response_window;
 492         }
 493
 494         if (home->num_pings_to_alive < 3) home->num_pings_to_alive = 3;
 495         if (home->num_pings_to_alive > 10) home->num_pings_to_alive = 10;
 496
 497         if (home->ping_timeout < 3) home->ping_timeout = 3;
 498         if (home->ping_timeout > 10) home->ping_timeout = 10;
 499
 500         if (home->revive_interval < 60) home->revive_interval = 60;
 501         if (home->revive_interval > 3600) home->revive_interval = 3600;
 502
 503 #ifdef WITH_COA
 504         if (home->coa_irt < 1) home->coa_irt = 1;
 505         if (home->coa_irt > 5) home->coa_irt = 5;
 506
 507         if (home->coa_mrc < 0) home->coa_mrc = 0;
 508         if (home->coa_mrc > 20 ) home->coa_mrc = 20;
 509
 510         if (home->coa_mrt < 0) home->coa_mrt = 0;
 511         if (home->coa_mrt > 30 ) home->coa_mrt = 30;
 512
 513         if (home->coa_mrd < 5) home->coa_mrd = 5;
 514         if (home->coa_mrd > 60 ) home->coa_mrd = 60;
 515 #endif
 516
 517         if (home->limit.max_connections > 1024) home->limit.max_connections = 1024;
 518
 519 #ifdef WITH_TCP
 520         /*
 521          *      UDP sockets can't be connection limited.
 522          */
 523         if (home->proto != IPPROTO_TCP) home->limit.max_connections = 0;
 524 #endif
 525
 526         if ((home->limit.idle_timeout > 0) && (home->limit.idle_timeout < 5))
 527                 home->limit.idle_timeout = 5;
 528         if ((home->limit.lifetime > 0) && (home->limit.lifetime < 5))
 529                 home->limit.lifetime = 5;
 530         if ((home->limit.lifetime > 0) && (home->limit.idle_timeout > home->limit.lifetime))
 531                 home->limit.idle_timeout = 0;
 532
 533
 534         if (cs) {
 535                 parent = cf_item_parent(cf_sectiontoitem(cs));
 536                 if (strcmp(cf_section_name1(parent), "server") == 0) {
 537                         home->parent_server = cf_section_name2(parent);
 538                 }
 539         }
 540
 541         if (dual) {
 542                 home_server *home2 = rad_malloc(sizeof(*home2));
 543
 544                 memcpy(home2, home, sizeof(*home2));
 545
 546                 home2->type = HOME_TYPE_ACCT;
 547                 home2->port++;
 548                 home2->ping_user_password = NULL;
 549                 home2->cs = cs;
 550                 home2->parent_server = home->parent_server;
 551
 552                 if (!rbtree_insert(home_servers_byname, home2)) {
 553                         cf_log_err(cf_sectiontoitem(cs),
 554                                    "Internal error %d adding home server %s.",
 555                                    __LINE__, name2);
 556                         free(home2);
 557                         return 0;
 558                 }
 559
 560                 if (!home->server &&
 561                     !rbtree_insert(home_servers_byaddr, home2)) {
 562                         rbtree_deletebydata(home_servers_byname, home2);
 563                         cf_log_err(cf_sectiontoitem(cs),
 564                                    "Internal error %d adding home server %s.",
 565                                    __LINE__, name2);
 566                         free(home2);
 567                         return 0;
 568                 }
 569
 570 #ifdef WITH_STATS
 571                 home2->number = home_server_max_number++;
 572                 if (!rbtree_insert(home_servers_bynumber, home2)) {
 573                         rbtree_deletebydata(home_servers_byname, home2);
 574                         if (!home2->server) {
 575                                 rbtree_deletebydata(home_servers_byname, home2);
 576                         }
 577                         cf_log_err(cf_sectiontoitem(cs),
 578                                    "Internal error %d adding home server %s.",
 579                                    __LINE__, name2);
 580                         free(home2);
 581                         return 0;
 582                 }
 583 #endif
 584         }
 585
 586         return 1;
 587  error:
 588         return 0;
 589 }
 590
 591
 592 static int home_server_add(realm_config_t *rc, CONF_SECTION *cs)
 593 {
 594         const char *name2;
 595         home_server *home;
 596         int dual = FALSE;
 597         CONF_PAIR *cp;
 598         CONF_SECTION *tls;
 599
 600         free(hs_virtual_server); /* used only for printing during parsing */
 601         hs_virtual_server = NULL;
 602
 603         name2 = cf_section_name2(cs);
 604         if (!name2) {
 605                 cf_log_err(cf_sectiontoitem(cs),
 606                            "Home server section is missing a name.");
 607                 return 0;
 608         }
 609
 610         home = rad_malloc(sizeof(*home));
 611         memset(home, 0, sizeof(*home));
 612
 613         home->name = name2;
 614         home->cs = cs;
 615         home->state = HOME_STATE_UNKNOWN;
 616
 617         /*
 618          *      Last packet sent / received are zero.
 619          */
 620
 621         memset(&hs_ip4addr, 0, sizeof(hs_ip4addr));
 622         memset(&hs_ip6addr, 0, sizeof(hs_ip6addr));
 623         if (cf_section_parse(cs, home, home_server_config) < 0) {
 624                 goto error;
 625         }
 626
 627         /*
 628          *      Figure out which one to use.
 629          */
 630         if (cf_pair_find(cs, "ipaddr")) {
 631                 home->ipaddr.af = AF_INET;
 632                 home->ipaddr.ipaddr.ip4addr = hs_ip4addr;
 633
 634         } else if (cf_pair_find(cs, "ipv6addr")) {
 635                 home->ipaddr.af = AF_INET6;
 636                 home->ipaddr.ipaddr.ip6addr = hs_ip6addr;
 637
 638         } else if ((cp = cf_pair_find(cs, "virtual_server")) != NULL) {
 639                 home->ipaddr.af = AF_UNSPEC;
 640                 home->server = cf_pair_value(cp);
 641                 if (!home->server) {
 642                         cf_log_err(cf_sectiontoitem(cs),
 643                                    "Invalid value for virtual_server");
 644                         goto error;
 645                 }
 646
 647                 if (!cf_section_sub_find_name2(rc->cs, "server", home->server)) {
 648
 649                         cf_log_err(cf_sectiontoitem(cs),
 650                                    "No such server %s", home->server);
 651                         goto error;
 652                 }
 653
 654                 /*
 655                  *      When CoA is used, the user has to specify the type
 656                  *      of the home server, even when they point to
 657                  *      virtual servers.
 658                  */
 659                 home->secret = strdup("");
 660                 goto skip_port;
 661
 662         } else {
 663                 cf_log_err(cf_sectiontoitem(cs),
 664                            "No ipaddr, ipv6addr, or virtual_server defined for home server \"%s\".",
 665                            name2);
 666         error:
 667                 free(home);
 668                 free(hs_type);
 669                 hs_type = NULL;
 670                 free(hs_check);
 671                 hs_check = NULL;
 672                 free(hs_srcipaddr);
 673                 hs_srcipaddr = NULL;
 674 #ifdef WITH_TCP
 675                 free(hs_proto);
 676                 hs_proto = NULL;
 677 #endif
 678                 return 0;
 679         }
 680
 681         if (!home->port || (home->port > 65535)) {
 682                 cf_log_err(cf_sectiontoitem(cs),
 683                            "No port, or invalid port defined for home server %s.",
 684                            name2);
 685                 goto error;
 686         }
 687
 688         if (0) {
 689                 cf_log_err(cf_sectiontoitem(cs),
 690                            "Fatal error!  Home server %s is ourselves!",
 691                            name2);
 692                 goto error;
 693         }
 694
 695         if (!home->secret) {
 696                 cf_log_err(cf_sectiontoitem(cs),
 697                            "No shared secret defined for home server %s.",
 698                            name2);
 699                 goto error;
 700         }
 701
 702         /*
 703          *      Use a reasonable default.
 704          */
 705  skip_port:
 706         if (!hs_type) hs_type = strdup("auth+acct");
 707
 708         if (strcasecmp(hs_type, "auth") == 0) {
 709                 home->type = HOME_TYPE_AUTH;
 710
 711         } else if (strcasecmp(hs_type, "acct") == 0) {
 712                 home->type = HOME_TYPE_ACCT;
 713
 714         } else if (strcasecmp(hs_type, "auth+acct") == 0) {
 715                 home->type = HOME_TYPE_AUTH;
 716                 dual = TRUE;
 717
 718 #ifdef WITH_COA
 719         } else if (strcasecmp(hs_type, "coa") == 0) {
 720                 home->type = HOME_TYPE_COA;
 721                 dual = FALSE;
 722
 723                 if (home->server != NULL) {
 724                         cf_log_err(cf_sectiontoitem(cs),
 725                                    "Home servers of type \"coa\" cannot point to a virtual server");
 726                         goto error;
 727                 }
 728 #endif
 729
 730         } else {
 731                 cf_log_err(cf_sectiontoitem(cs),
 732                            "Invalid type \"%s\" for home server %s.",
 733                            hs_type, name2);
 734                 goto error;
 735         }
 736         free(hs_type);
 737         hs_type = NULL;
 738
 739         if (!hs_check || (strcasecmp(hs_check, "none") == 0)) {
 740                 home->ping_check = HOME_PING_CHECK_NONE;
 741
 742         } else if (strcasecmp(hs_check, "status-server") == 0) {
 743                 home->ping_check = HOME_PING_CHECK_STATUS_SERVER;
 744
 745         } else if (strcasecmp(hs_check, "request") == 0) {
 746                 home->ping_check = HOME_PING_CHECK_REQUEST;
 747
 748                 if (!home->ping_user_name ||
 749                     !*home->ping_user_name) {
 750                         cf_log_err(cf_sectiontoitem(cs), "You must supply a 'username' to enable status_check=request");
 751                         goto error;
 752                 }
 753
 754                 if ((home->type == HOME_TYPE_AUTH) &&
 755                     (!home->ping_user_password ||
 756                      !*home->ping_user_password)) {
 757                         cf_log_err(cf_sectiontoitem(cs), "You must supply a password to enable status_check=request");
 758                         goto error;
 759                 }
 760
 761         } else {
 762                 cf_log_err(cf_sectiontoitem(cs),
 763                            "Invalid status__check \"%s\" for home server %s.",
 764                            hs_check, name2);
 765                 goto error;
 766         }
 767         free(hs_check);
 768         hs_check = NULL;
 769
 770         if ((home->ping_check != HOME_PING_CHECK_NONE) &&
 771             (home->ping_check != HOME_PING_CHECK_STATUS_SERVER)) {
 772                 if (!home->ping_user_name) {
 773                         cf_log_err(cf_sectiontoitem(cs), "You must supply a user name to enable status_check=request");
 774                         goto error;
 775                 }
 776
 777                 if ((home->type == HOME_TYPE_AUTH) &&
 778                     !home->ping_user_password) {
 779                         cf_log_err(cf_sectiontoitem(cs), "You must supply a password to enable status_check=request");
 780                         goto error;
 781                 }
 782         }
 783
 784         home->proto = IPPROTO_UDP;
 785 #ifdef WITH_TCP
 786         if (hs_proto) {
 787                 if (strcmp(hs_proto, "udp") == 0) {
 788                         free(hs_proto);
 789                         hs_proto = NULL;
 790
 791                 } else if (strcmp(hs_proto, "tcp") == 0) {
 792                         free(hs_proto);
 793                         hs_proto = NULL;
 794                         home->proto = IPPROTO_TCP;
 795
 796                         if (home->ping_check != HOME_PING_CHECK_NONE) {
 797                                 cf_log_err(cf_sectiontoitem(cs),
 798                                            "Only 'status_check = none' is allowed for home servers with 'proto = tcp'");
 799                                 goto error;
 800                         }
 801
 802                 } else {
 803                         cf_log_err(cf_sectiontoitem(cs),
 804                                    "Unknown proto \"%s\".", hs_proto);
 805                         goto error;
 806                 }
 807         }
 808 #endif
 809
 810         if (!home->server &&
 811             rbtree_finddata(home_servers_byaddr, home)) {
 812                 cf_log_err(cf_sectiontoitem(cs), "Duplicate home server");
 813                 goto error;
 814         }
 815
 816         /*
 817          *      Check the TLS configuration.
 818          */
 819         tls = cf_section_sub_find(cs, "tls");
 820
 821         /*
 822          *      If the home is a virtual server, don't look up source IP.
 823          */
 824         if (!home->server) {
 825                 rad_assert(home->ipaddr.af != AF_UNSPEC);
 826
 827                 /*
 828                  *      Otherwise look up the source IP using the same
 829                  *      address family as the destination IP.
 830                  */
 831                 if (hs_srcipaddr) {
 832                         if (ip_hton(hs_srcipaddr, home->ipaddr.af, &home->src_ipaddr) < 0) {
 833                                 cf_log_err(cf_sectiontoitem(cs), "Failed parsing src_ipaddr");
 834                                 goto error;
 835                         }
 836
 837                 } else {
 838                         /*
 839                          *      Source isn't specified: Source is
 840                          *      the correct address family, but all zeros.
 841                          */
 842                         memset(&home->src_ipaddr, 0, sizeof(home->src_ipaddr));
 843                         home->src_ipaddr.af = home->ipaddr.af;
 844                 }
 845
 846                 if (tls && (home->proto != IPPROTO_TCP)) {
 847                         cf_log_err(cf_sectiontoitem(cs), "TLS transport is not available for UDP sockets.");
 848                         goto error;
 849                 }
 850
 851 #ifndef WITH_TLS
 852
 853                 if (tls) {
 854                         cf_log_err(cf_sectiontoitem(cs), "TLS transport is not available in this executable.");
 855                         goto error;
 856                 }
 857 #else
 858                 /*
 859                  *      Parse the SSL client configuration.
 860                  */
 861                 if (tls) {
 862                         home->tls = tls_client_conf_parse(tls);
 863                         if (!home->tls) {
 864                                 goto error;
 865                         }
 866                 }
 867 #endif
 868
 869         } else if (tls) {
 870                 cf_log_err(cf_sectiontoitem(cs), "Virtual home_servers cannot have a \"tls\" subsection");
 871                 goto error;
 872         }
 873
 874         if ( !realms_home_server_add( home, cs, dual))
 875                 goto error;
 876
 877         /*
 878          *      Mark it as already processed
 879          */
 880         cf_data_add(cs, "home_server", null_free, null_free);
 881
 882         return 1;
 883 }
 884
 885
 886 static home_pool_t *server_pool_alloc(const char *name, home_pool_type_t type,
 887                                       int server_type, int num_home_servers)
 888 {
 889         home_pool_t *pool;
 890
 891         pool = rad_malloc(sizeof(*pool) + (sizeof(pool->servers[0]) *
 892                                            num_home_servers));
 893         if (!pool) return NULL; /* just for pairanoia */
 894
 895         memset(pool, 0, sizeof(*pool) + (sizeof(pool->servers[0]) *
 896                                          num_home_servers));
 897
 898         pool->name = name;
 899         pool->type = type;
 900         pool->server_type = server_type;
 901         pool->num_home_servers = num_home_servers;
 902
 903         return pool;
 904 }
 905
 906 static int pool_check_home_server(realm_config_t *rc, CONF_PAIR *cp,
 907                                   const char *name, int server_type,
 908                                   home_server **phome)
 909 {
 910         home_server myhome, *home;
 911         CONF_SECTION *server_cs;
 912
 913         if (!name) {
 914                 cf_log_err(cf_pairtoitem(cp),
 915                            "No value given for home_server.");
 916                 return 0;
 917         }
 918
 919         myhome.name = name;
 920         myhome.type = server_type;
 921         home = rbtree_finddata(home_servers_byname, &myhome);
 922         if (home) {
 923                 *phome = home;
 924                 return 1;
 925         }
 926
 927         server_cs = cf_section_sub_find_name2(rc->cs, "home_server", name);
 928         if (!server_cs) {
 929                 cf_log_err(cf_pairtoitem(cp),
 930                            "Unknown home_server \"%s\".", name);
 931                 return 0;
 932         }
 933
 934         home = rbtree_finddata(home_servers_byname, &myhome);
 935         if (!home) {
 936                 cf_log_err(cf_pairtoitem(cp),
 937                            "Internal error %d adding home server \"%s\".",
 938                            __LINE__, name);
 939                 return 0;
 940         }
 941
 942         *phome = home;
 943         return 1;
 944 }
 945
 946
 947 int realms_pool_add( home_pool_t *pool, UNUSED CONF_SECTION *cs)
 948 {
 949                 if (!rbtree_insert(home_pools_byname, pool)) {
 950                 rad_assert("Internal sanity check failed");
 951                 return 0;
 952         }
 953                 return 1;
 954 }
 955
 956
 957 static int server_pool_add(realm_config_t *rc,
 958                            CONF_SECTION *cs, int server_type, int do_print)
 959 {
 960         const char *name2;
 961         home_pool_t *pool = NULL;
 962         const char *value;
 963         CONF_PAIR *cp;
 964         int num_home_servers;
 965         home_server *home;
 966
 967         name2 = cf_section_name1(cs);
 968         if (!name2 || ((strcasecmp(name2, "server_pool") != 0) &&
 969                        (strcasecmp(name2, "home_server_pool") != 0))) {
 970                 cf_log_err(cf_sectiontoitem(cs),
 971                            "Section is not a home_server_pool.");
 972                 return 0;
 973         }
 974
 975         name2 = cf_section_name2(cs);
 976         if (!name2) {
 977                 cf_log_err(cf_sectiontoitem(cs),
 978                            "Server pool section is missing a name.");
 979                 return 0;
 980         }
 981
 982         /*
 983          *      Count the home servers and initalize them.
 984          */
 985         num_home_servers = 0;
 986         for (cp = cf_pair_find(cs, "home_server");
 987              cp != NULL;
 988              cp = cf_pair_find_next(cs, cp, "home_server")) {
 989                 num_home_servers++;
 990
 991                 if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
 992                                             server_type, &home)) {
 993                         return 0;
 994                 }
 995         }
 996
 997         if (num_home_servers == 0) {
 998                 cf_log_err(cf_sectiontoitem(cs),
 999                            "No home servers defined in pool %s",
1000                            name2);
1001                 goto error;
1002         }
1003
1004         pool = server_pool_alloc(name2, HOME_POOL_FAIL_OVER, server_type,
1005                                  num_home_servers);
1006         pool->cs = cs;
1007
1008
1009         /*
1010          *      Fallback servers must be defined, and must be
1011          *      virtual servers.
1012          */
1013         cp = cf_pair_find(cs, "fallback");
1014         if (cp) {
1015 #ifdef WITH_COA
1016                 if (server_type == HOME_TYPE_COA) {
1017                         cf_log_err(cf_sectiontoitem(cs), "Home server pools of type \"coa\" cannot have a fallback virtual server.");
1018                         goto error;
1019                 }
1020 #endif
1021
1022                 if (!pool_check_home_server(rc, cp, cf_pair_value(cp),
1023                                             server_type, &pool->fallback)) {
1024
1025                         goto error;
1026                 }
1027
1028                 if (!pool->fallback->server) {
1029                         cf_log_err(cf_sectiontoitem(cs), "Fallback home_server %s does NOT contain a virtual_server directive.", pool->fallback->name);
1030                         goto error;
1031                 }
1032         }
1033
1034         if (do_print) cf_log_info(cs, " home_server_pool %s {", name2);
1035
1036         cp = cf_pair_find(cs, "type");
1037         if (cp) {
1038                 static FR_NAME_NUMBER pool_types[] = {
1039                         { "load-balance", HOME_POOL_LOAD_BALANCE },
1040                         { "fail-over", HOME_POOL_FAIL_OVER },
1041                         { "round_robin", HOME_POOL_LOAD_BALANCE },
1042                         { "fail_over", HOME_POOL_FAIL_OVER },
1043                         { "client-balance", HOME_POOL_CLIENT_BALANCE },
1044                         { "client-port-balance", HOME_POOL_CLIENT_PORT_BALANCE },
1045                         { "keyed-balance", HOME_POOL_KEYED_BALANCE },
1046                         { NULL, 0 }
1047                 };
1048
1049                 value = cf_pair_value(cp);
1050                 if (!value) {
1051                         cf_log_err(cf_pairtoitem(cp),
1052                                    "No value given for type.");
1053                         goto error;
1054                 }
1055
1056                 pool->type = fr_str2int(pool_types, value, 0);
1057                 if (!pool->type) {
1058                         cf_log_err(cf_pairtoitem(cp),
1059                                    "Unknown type \"%s\".",
1060                                    value);
1061                         goto error;
1062                 }
1063
1064                 if (do_print) cf_log_info(cs, "\ttype = %s", value);
1065         }
1066
1067         cp = cf_pair_find(cs, "virtual_server");
1068         if (cp) {
1069                 pool->virtual_server = cf_pair_value(cp);
1070                 if (!pool->virtual_server) {
1071                         cf_log_err(cf_pairtoitem(cp), "No value given for virtual_server");
1072                         goto error;
1073                 }
1074
1075                 if (do_print) {
1076                         cf_log_info(cs, "\tvirtual_server = %s", pool->virtual_server);
1077                 }
1078
1079                 if (!cf_section_sub_find_name2(rc->cs, "server",
1080                                                pool->virtual_server)) {
1081                         cf_log_err(cf_pairtoitem(cp), "No such server %s",
1082                                    pool->virtual_server);
1083                         goto error;
1084                 }
1085
1086         }
1087
1088         num_home_servers = 0;
1089         for (cp = cf_pair_find(cs, "home_server");
1090              cp != NULL;
1091              cp = cf_pair_find_next(cs, cp, "home_server")) {
1092                 home_server myhome;
1093
1094                 value = cf_pair_value(cp);
1095
1096                 memset(&myhome, 0, sizeof(myhome));
1097                 myhome.name = value;
1098                 myhome.type = server_type;
1099
1100                 home = rbtree_finddata(home_servers_byname, &myhome);
1101                 if (!home) {
1102                         DEBUG2("Internal sanity check failed");
1103                         goto error;
1104                 }
1105
1106                 if (0) {
1107                         DEBUG2("Warning: Duplicate home server %s in server pool %s", home->name, pool->name);
1108                         continue;
1109                 }
1110
1111                 if (do_print) cf_log_info(cs, "\thome_server = %s", home->name);
1112                 pool->servers[num_home_servers++] = home;
1113         } /* loop over home_server's */
1114
1115         if (pool->fallback && do_print) {
1116                 cf_log_info(cs, "\tfallback = %s", pool->fallback->name);
1117         }
1118
1119         if (! realms_pool_add(pool, cs)) {
1120                 goto error;
1121         }
1122
1123         if (do_print) cf_log_info(cs, " }");
1124
1125         cf_data_add(cs, "home_server_pool", pool, free);
1126
1127         rad_assert(pool->server_type != 0);
1128
1129         return 1;
1130
1131  error:
1132         if (do_print) cf_log_info(cs, " }");
1133         free(pool);
1134         return 0;
1135 }
1136 #endif
1137
1138 static int old_server_add(realm_config_t *rc, CONF_SECTION *cs,
1139                           const char *realm,
1140                           const char *name, const char *secret,
1141                           home_pool_type_t ldflag, home_pool_t **pool_p,
1142                           int type, const char *server)
1143 {
1144 #ifdef WITH_PROXY
1145         int i, insert_point, num_home_servers;
1146         home_server myhome, *home;
1147         home_pool_t mypool, *pool;
1148         CONF_SECTION *subcs;
1149 #else
1150         rc = rc;                /* -Wunused */
1151         realm = realm;
1152         secret = secret;
1153         ldflag = ldflag;
1154         type = type;
1155         server = server;
1156 #endif
1157
1158         /*
1159          *      LOCAL realms get sanity checked, and nothing else happens.
1160          */
1161         if (strcmp(name, "LOCAL") == 0) {
1162                 if (*pool_p) {
1163                         cf_log_err(cf_sectiontoitem(cs), "Realm \"%s\" cannot be both LOCAL and remote", name);
1164                         return 0;
1165                 }
1166                 return 1;
1167         }
1168
1169 #ifndef WITH_PROXY
1170         return 0;               /* Not proxying.  Can't do non-LOCAL realms */
1171
1172 #else
1173         mypool.name = realm;
1174         mypool.server_type = type;
1175         pool = rbtree_finddata(home_pools_byname, &mypool);
1176         if (pool) {
1177                 if (pool->type != ldflag) {
1178                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent ldflag for server pool \"%s\"", name);
1179                         return 0;
1180                 }
1181
1182                 if (pool->server_type != type) {
1183                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent home server type for server pool \"%s\"", name);
1184                         return 0;
1185                 }
1186         }
1187
1188         myhome.name = name;
1189         myhome.type = type;
1190         home = rbtree_finddata(home_servers_byname, &myhome);
1191         if (home) {
1192                 if (secret && (strcmp(home->secret, secret) != 0)) {
1193                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent shared secret for home server \"%s\"", name);
1194                         return 0;
1195                 }
1196
1197                 if (home->type != type) {
1198                         cf_log_err(cf_sectiontoitem(cs), "Inconsistent type for home server \"%s\"", name);
1199                         return 0;
1200                 }
1201
1202                 /*
1203                  *      See if the home server is already listed
1204                  *      in the pool.  If so, do nothing else.
1205                  */
1206                 if (pool) for (i = 0; i < pool->num_home_servers; i++) {
1207                         if (pool->servers[i] == home) {
1208                                 return 1;
1209                         }
1210                 }
1211         }
1212
1213         /*
1214          *      If we do have a pool, check that there is room to
1215          *      insert the home server we've found, or the one that we
1216          *      create here.
1217          *
1218          *      Note that we insert it into the LAST available
1219          *      position, in order to maintain the same order as in
1220          *      the configuration files.
1221          */
1222         insert_point = -1;
1223         if (pool) {
1224                 for (i = pool->num_home_servers - 1; i >= 0; i--) {
1225                         if (pool->servers[i]) break;
1226
1227                         if (!pool->servers[i]) {
1228                                 insert_point = i;
1229                         }
1230                 }
1231
1232                 if (insert_point < 0) {
1233                         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);
1234                         return 0;
1235                 }
1236         }
1237
1238         /*
1239          *      No home server, allocate one.
1240          */
1241         if (!home) {
1242                 const char *p;
1243                 char *q;
1244
1245                 home = rad_malloc(sizeof(*home));
1246                 memset(home, 0, sizeof(*home));
1247
1248                 home->name = name;
1249                 home->hostname = name;
1250                 home->type = type;
1251                 home->secret = secret;
1252                 home->cs = cs;
1253                 home->proto = IPPROTO_UDP;
1254
1255                 p = strchr(name, ':');
1256                 if (!p) {
1257                         if (type == HOME_TYPE_AUTH) {
1258                                 home->port = PW_AUTH_UDP_PORT;
1259                         } else {
1260                                 home->port = PW_ACCT_UDP_PORT;
1261                         }
1262
1263                         p = name;
1264                         q = NULL;
1265
1266                 } else if (p == name) {
1267                                 cf_log_err(cf_sectiontoitem(cs),
1268                                            "Invalid hostname %s.",
1269                                            name);
1270                                 free(home);
1271                                 return 0;
1272
1273                 } else {
1274                         home->port = atoi(p + 1);
1275                         if ((home->port == 0) || (home->port > 65535)) {
1276                                 cf_log_err(cf_sectiontoitem(cs),
1277                                            "Invalid port %s.",
1278                                            p + 1);
1279                                 free(home);
1280                                 return 0;
1281                         }
1282
1283                         q = rad_malloc((p - name) + 1);
1284                         memcpy(q, name, (p - name));
1285                         q[p - name] = '\0';
1286                         p = q;
1287                 }
1288
1289                 if (!server) {
1290                         if (ip_hton(p, AF_UNSPEC, &home->ipaddr) < 0) {
1291                                 cf_log_err(cf_sectiontoitem(cs),
1292                                            "Failed looking up hostname %s.",
1293                                            p);
1294                                 free(home);
1295                                 free(q);
1296                                 return 0;
1297                         }
1298                         home->src_ipaddr.af = home->ipaddr.af;
1299                 } else {
1300                         home->ipaddr.af = AF_UNSPEC;
1301                         home->server = server;
1302                 }
1303                 free(q);
1304
1305                 /*
1306                  *      Use the old-style configuration.
1307                  */
1308                 home->max_outstanding = 65535*16;
1309                 home->zombie_period = rc->retry_delay * rc->retry_count;
1310                 if (home->zombie_period == 0) home->zombie_period =30;
1311                 home->response_window = home->zombie_period - 1;
1312
1313                 home->ping_check = HOME_PING_CHECK_NONE;
1314
1315                 home->revive_interval = rc->dead_time;
1316
1317                 if (rbtree_finddata(home_servers_byaddr, home)) {
1318                         cf_log_err(cf_sectiontoitem(cs), "Home server %s has the same IP address and/or port as another home server.", name);
1319                         free(home);
1320                         return 0;
1321                 }
1322
1323                 if (!rbtree_insert(home_servers_byname, home)) {
1324                         cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
1325                         free(home);
1326                         return 0;
1327                 }
1328
1329                 if (!rbtree_insert(home_servers_byaddr, home)) {
1330                         rbtree_deletebydata(home_servers_byname, home);
1331                         cf_log_err(cf_sectiontoitem(cs), "Internal error %d adding home server %s.", __LINE__, name);
1332                         free(home);
1333                         return 0;
1334                 }
1335
1336 #ifdef WITH_STATS
1337                 home->number = home_server_max_number++;
1338                 if (!rbtree_insert(home_servers_bynumber, home)) {
1339                         rbtree_deletebydata(home_servers_byname, home);
1340                         if (home->ipaddr.af != AF_UNSPEC) {
1341                                 rbtree_deletebydata(home_servers_byname, home);
1342                         }
1343                         cf_log_err(cf_sectiontoitem(cs),
1344                                    "Internal error %d adding home server %s.",
1345                                    __LINE__, name);
1346                         free(home);
1347                         return 0;
1348                 }
1349 #endif
1350         }
1351
1352         /*
1353          *      We now have a home server, see if we can insert it
1354          *      into pre-existing pool.
1355          */
1356         if (insert_point >= 0) {
1357                 rad_assert(pool != NULL);
1358                 pool->servers[insert_point] = home;
1359                 return 1;
1360         }
1361
1362         rad_assert(pool == NULL);
1363         rad_assert(home != NULL);
1364
1365         /*
1366          *      Count the old-style realms of this name.
1367          */
1368         num_home_servers = 0;
1369         for (subcs = cf_section_find_next(cs, NULL, "realm");
1370              subcs != NULL;
1371              subcs = cf_section_find_next(cs, subcs, "realm")) {
1372                 const char *this = cf_section_name2(subcs);
1373
1374                 if (!this || (strcmp(this, realm) != 0)) continue;
1375                 num_home_servers++;
1376         }
1377
1378         if (num_home_servers == 0) {
1379                 cf_log_err(cf_sectiontoitem(cs), "Internal error counting pools for home server %s.", name);
1380                 free(home);
1381                 return 0;
1382         }
1383
1384         pool = server_pool_alloc(realm, ldflag, type, num_home_servers);
1385         pool->cs = cs;
1386
1387         pool->servers[0] = home;
1388
1389         if (!rbtree_insert(home_pools_byname, pool)) {
1390                 rad_assert("Internal sanity check failed");
1391                 return 0;
1392         }
1393
1394         *pool_p = pool;
1395
1396         return 1;
1397 #endif
1398 }
1399
1400 static int old_realm_config(realm_config_t *rc, CONF_SECTION *cs, REALM *r)
1401 {
1402         const char *host;
1403         const char *secret = NULL;
1404         home_pool_type_t ldflag;
1405         CONF_PAIR *cp;
1406
1407         cp = cf_pair_find(cs, "ldflag");
1408         ldflag = HOME_POOL_FAIL_OVER;
1409         if (cp) {
1410                 host = cf_pair_value(cp);
1411                 if (!host) {
1412                         cf_log_err(cf_pairtoitem(cp), "No value specified for ldflag");
1413                         return 0;
1414                 }
1415
1416                 if (strcasecmp(host, "fail_over") == 0) {
1417                         cf_log_info(cs, "\tldflag = fail_over");
1418
1419                 } else if (strcasecmp(host, "round_robin") == 0) {
1420                         ldflag = HOME_POOL_LOAD_BALANCE;
1421                         cf_log_info(cs, "\tldflag = round_robin");
1422
1423                 } else {
1424                         cf_log_err(cf_sectiontoitem(cs), "Unknown value \"%s\" for ldflag", host);
1425                         return 0;
1426                 }
1427         } /* else don't print it. */
1428
1429         /*
1430          *      Allow old-style if it doesn't exist, or if it exists and
1431          *      it's LOCAL.
1432          */
1433         cp = cf_pair_find(cs, "authhost");
1434         if (cp) {
1435                 host = cf_pair_value(cp);
1436                 if (!host) {
1437                         cf_log_err(cf_pairtoitem(cp), "No value specified for authhost");
1438                         return 0;
1439                 }
1440
1441                 if (strcmp(host, "LOCAL") != 0) {
1442                         cp = cf_pair_find(cs, "secret");
1443                         if (!cp) {
1444                                 cf_log_err(cf_sectiontoitem(cs), "No shared secret supplied for realm: %s", r->name);
1445                                 return 0;
1446                         }
1447
1448                         secret = cf_pair_value(cp);
1449                         if (!secret) {
1450                                 cf_log_err(cf_pairtoitem(cp), "No value specified for secret");
1451                                 return 0;
1452                         }
1453                 }
1454
1455                 cf_log_info(cs, "\tauthhost = %s",  host);
1456
1457                 if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
1458                                     &r->auth_pool, HOME_TYPE_AUTH, NULL)) {
1459                         return 0;
1460                 }
1461         }
1462
1463         cp = cf_pair_find(cs, "accthost");
1464         if (cp) {
1465                 host = cf_pair_value(cp);
1466                 if (!host) {
1467                         cf_log_err(cf_pairtoitem(cp), "No value specified for accthost");
1468                         return 0;
1469                 }
1470
1471                 /*
1472                  *      Don't look for a secret again if it was found
1473                  *      above.
1474                  */
1475                 if ((strcmp(host, "LOCAL") != 0) && !secret) {
1476                         cp = cf_pair_find(cs, "secret");
1477                         if (!cp) {
1478                                 cf_log_err(cf_sectiontoitem(cs), "No shared secret supplied for realm: %s", r->name);
1479                                 return 0;
1480                         }
1481
1482                         secret = cf_pair_value(cp);
1483                         if (!secret) {
1484                                 cf_log_err(cf_pairtoitem(cp), "No value specified for secret");
1485                                 return 0;
1486                         }
1487                 }
1488
1489                 cf_log_info(cs, "\taccthost = %s", host);
1490
1491                 if (!old_server_add(rc, cs, r->name, host, secret, ldflag,
1492                                     &r->acct_pool, HOME_TYPE_ACCT, NULL)) {
1493                         return 0;
1494                 }
1495         }
1496
1497         cp = cf_pair_find(cs, "virtual_server");
1498         if (cp) {
1499                 host = cf_pair_value(cp);
1500                 if (!host) {
1501                         cf_log_err(cf_pairtoitem(cp), "No value specified for virtual_server");
1502                         return 0;
1503                 }
1504
1505                 cf_log_info(cs, "\tvirtual_server = %s", host);
1506
1507                 if (!old_server_add(rc, cs, r->name, host, "", ldflag,
1508                                     &r->auth_pool, HOME_TYPE_AUTH, host)) {
1509                         return 0;
1510                 }
1511                 if (!old_server_add(rc, cs, r->name, host, "", ldflag,
1512                                     &r->acct_pool, HOME_TYPE_ACCT, host)) {
1513                         return 0;
1514                 }
1515         }
1516
1517         if (secret) cf_log_info(cs, "\tsecret = %s", secret);
1518
1519         return 1;
1520
1521 }
1522
1523
1524 #ifdef WITH_PROXY
1525 static int add_pool_to_realm(realm_config_t *rc, CONF_SECTION *cs,
1526                              const char *name, home_pool_t **dest,
1527                              int server_type, int do_print)
1528 {
1529         home_pool_t mypool, *pool;
1530
1531         mypool.name = name;
1532         mypool.server_type = server_type;
1533
1534         pool = rbtree_finddata(home_pools_byname, &mypool);
1535         if (!pool) {
1536                 CONF_SECTION *pool_cs;
1537
1538                 pool_cs = cf_section_sub_find_name2(rc->cs,
1539                                                     "home_server_pool",
1540                                                     name);
1541                 if (!pool_cs) {
1542                         pool_cs = cf_section_sub_find_name2(rc->cs,
1543                                                             "server_pool",
1544                                                             name);
1545                 }
1546                 if (!pool_cs) {
1547                         cf_log_err(cf_sectiontoitem(cs), "Failed to find home_server_pool \"%s\"", name);
1548                         return 0;
1549                 }
1550
1551                 if (!server_pool_add(rc, pool_cs, server_type, do_print)) {
1552                         return 0;
1553                 }
1554
1555                 pool = rbtree_finddata(home_pools_byname, &mypool);
1556                 if (!pool) {
1557                         radlog(L_ERR, "Internal sanity check failed in add_pool_to_realm");
1558                         return 0;
1559                 }
1560         }
1561
1562         if (pool->server_type != server_type) {
1563                 cf_log_err(cf_sectiontoitem(cs), "Incompatible home_server_pool \"%s\" (mixed auth_pool / acct_pool)", name);
1564                 return 0;
1565         }
1566
1567         *dest = pool;
1568
1569         return 1;
1570 }
1571 #endif
1572
1573
1574 int realms_realm_add (REALM *r, CONF_SECTION *cs)
1575 {
1576         #ifdef HAVE_REGEX_H
1577         /*
1578          *      It's a regex.  Add it to a separate list.
1579          */
1580         if (r->name[0] == '~') {
1581                 realm_regex_t *rr, **last;
1582
1583                 rr = rad_malloc(sizeof(*rr));
1584
1585                 last = &realms_regex;
1586                 while (*last) last = &((*last)->next);  /* O(N^2)... sue me. */
1587
1588                 rr->realm = r;
1589                 rr->next = NULL;
1590
1591                 *last = rr;
1592
1593                 return 1;
1594         }
1595 #endif
1596
1597         if (!rbtree_insert(realms_byname, r)) {
1598                 rad_assert("Internal sanity check failed");
1599                 return 0;
1600         }
1601
1602         return 1;
1603 }
1604
1605
1606 static int realm_add(realm_config_t *rc, CONF_SECTION *cs)
1607 {
1608         const char *name2;
1609         REALM *r = NULL;
1610         CONF_PAIR *cp;
1611 #ifdef WITH_PROXY
1612         home_pool_t *auth_pool, *acct_pool;
1613         const char *auth_pool_name, *acct_pool_name;
1614 #ifdef WITH_COA
1615         const char *coa_pool_name;
1616         home_pool_t *coa_pool;
1617 #endif
1618 #endif
1619
1620         name2 = cf_section_name1(cs);
1621         if (!name2 || (strcasecmp(name2, "realm") != 0)) {
1622                 cf_log_err(cf_sectiontoitem(cs), "Section is not a realm.");
1623                 return 0;
1624         }
1625
1626         name2 = cf_section_name2(cs);
1627         if (!name2) {
1628                 cf_log_err(cf_sectiontoitem(cs), "Realm section is missing the realm name.");
1629                 return 0;
1630         }
1631
1632 #ifdef WITH_PROXY
1633         auth_pool = acct_pool = NULL;
1634         auth_pool_name = acct_pool_name = NULL;
1635 #ifdef WITH_COA
1636         coa_pool = NULL;
1637         coa_pool_name = NULL;
1638 #endif
1639
1640         /*
1641          *      Prefer new configuration to old one.
1642          */
1643         cp = cf_pair_find(cs, "pool");
1644         if (!cp) cp = cf_pair_find(cs, "home_server_pool");
1645         if (cp) auth_pool_name = cf_pair_value(cp);
1646         if (cp && auth_pool_name) {
1647                 acct_pool_name = auth_pool_name;
1648                 if (!add_pool_to_realm(rc, cs,
1649                                        auth_pool_name, &auth_pool,
1650                                        HOME_TYPE_AUTH, 1)) {
1651                         return 0;
1652                 }
1653                 if (!add_pool_to_realm(rc, cs,
1654                                        auth_pool_name, &acct_pool,
1655                                        HOME_TYPE_ACCT, 0)) {
1656                         return 0;
1657                 }
1658         }
1659
1660         cp = cf_pair_find(cs, "auth_pool");
1661         if (cp) auth_pool_name = cf_pair_value(cp);
1662         if (cp && auth_pool_name) {
1663                 if (auth_pool) {
1664                         cf_log_err(cf_sectiontoitem(cs), "Cannot use \"pool\" and \"auth_pool\" at the same time.");
1665                         return 0;
1666                 }
1667                 if (!add_pool_to_realm(rc, cs,
1668                                        auth_pool_name, &auth_pool,
1669                                        HOME_TYPE_AUTH, 1)) {
1670                         return 0;
1671                 }
1672         }
1673
1674         cp = cf_pair_find(cs, "acct_pool");
1675         if (cp) acct_pool_name = cf_pair_value(cp);
1676         if (cp && acct_pool_name) {
1677                 int do_print = TRUE;
1678
1679                 if (acct_pool) {
1680                         cf_log_err(cf_sectiontoitem(cs), "Cannot use \"pool\" and \"acct_pool\" at the same time.");
1681                         return 0;
1682                 }
1683
1684                 if (!auth_pool ||
1685                     (auth_pool_name &&
1686                      (strcmp(auth_pool_name, acct_pool_name) != 0))) {
1687                         do_print = TRUE;
1688                 }
1689
1690                 if (!add_pool_to_realm(rc, cs,
1691                                        acct_pool_name, &acct_pool,
1692                                        HOME_TYPE_ACCT, do_print)) {
1693                         return 0;
1694                 }
1695         }
1696
1697 #ifdef WITH_COA
1698         cp = cf_pair_find(cs, "coa_pool");
1699         if (cp) coa_pool_name = cf_pair_value(cp);
1700         if (cp && coa_pool_name) {
1701                 int do_print = TRUE;
1702
1703                 if (!add_pool_to_realm(rc, cs,
1704                                        coa_pool_name, &coa_pool,
1705                                        HOME_TYPE_COA, do_print)) {
1706                         return 0;
1707                 }
1708         }
1709 #endif
1710 #endif
1711
1712         cf_log_info(cs, " realm %s {", name2);
1713
1714 #ifdef WITH_PROXY
1715         /*
1716          *      The realm MAY already exist if it's an old-style realm.
1717          *      In that case, merge the old-style realm with this one.
1718          */
1719         r = realm_find2(name2);
1720         if (r && (strcmp(r->name, name2) == 0)) {
1721                 if (cf_pair_find(cs, "auth_pool") ||
1722                     cf_pair_find(cs, "acct_pool")) {
1723                         cf_log_err(cf_sectiontoitem(cs), "Duplicate realm \"%s\"", name2);
1724                         goto error;
1725                 }
1726
1727                 if (!old_realm_config(rc, cs, r)) {
1728                         goto error;
1729                 }
1730
1731                 cf_log_info(cs, " } # realm %s", name2);
1732                 return 1;
1733         }
1734 #endif
1735
1736 #ifdef HAVE_REGEX_H
1737         if (name2[0] == '~') {
1738                 int rcode;
1739                 regex_t reg;
1740
1741                 /*
1742                  *      Include substring matches.
1743                  */
1744                 rcode = regcomp(&reg, name2 + 1,
1745                                 REG_EXTENDED | REG_NOSUB | REG_ICASE);
1746                 if (rcode != 0) {
1747                         char buffer[256];
1748
1749                         regerror(rcode, &reg, buffer, sizeof(buffer));
1750
1751                         cf_log_err(cf_sectiontoitem(cs),
1752                                    "Invalid regex \"%s\": %s",
1753                                    name2 + 1, buffer);
1754                         goto error;
1755                 }
1756                 regfree(&reg);
1757         }
1758 #endif
1759
1760         r = rad_malloc(sizeof(*r));
1761         memset(r, 0, sizeof(*r));
1762
1763         r->name = name2;
1764         r->striprealm = 1;
1765 #ifdef WITH_PROXY
1766         r->auth_pool = auth_pool;
1767         r->acct_pool = acct_pool;
1768 #ifdef WITH_COA
1769         r->coa_pool = coa_pool;
1770 #endif
1771
1772         if (auth_pool_name &&
1773             (auth_pool_name == acct_pool_name)) { /* yes, ptr comparison */
1774                 cf_log_info(cs, "\tpool = %s", auth_pool_name);
1775         } else {
1776                 if (auth_pool_name) cf_log_info(cs, "\tauth_pool = %s", auth_pool_name);
1777                 if (acct_pool_name) cf_log_info(cs, "\tacct_pool = %s", acct_pool_name);
1778 #ifdef WITH_COA
1779                 if (coa_pool_name) cf_log_info(cs, "\tcoa_pool = %s", coa_pool_name);
1780 #endif
1781         }
1782 #endif
1783
1784         cp = cf_pair_find(cs, "nostrip");
1785         if (cp && (cf_pair_value(cp) == NULL)) {
1786                 r->striprealm = 0;
1787                 cf_log_info(cs, "\tnostrip");
1788         }
1789
1790         /*
1791          *      We're a new-style realm.  Complain if we see the old
1792          *      directives.
1793          */
1794         if (r->auth_pool || r->acct_pool) {
1795                 if (((cp = cf_pair_find(cs, "authhost")) != NULL) ||
1796                     ((cp = cf_pair_find(cs, "accthost")) != NULL) ||
1797                     ((cp = cf_pair_find(cs, "secret")) != NULL) ||
1798                     ((cp = cf_pair_find(cs, "ldflag")) != NULL)) {
1799                         DEBUG2("WARNING: Ignoring old-style configuration entry \"%s\" in realm \"%s\"", cf_pair_attr(cp), r->name);
1800                 }
1801
1802
1803                 /*
1804                  *      The realm MAY be an old-style realm, as there
1805                  *      was no auth_pool or acct_pool.  Double-check
1806                  *      it, just to be safe.
1807                  */
1808         } else if (!old_realm_config(rc, cs, r)) {
1809                 goto error;
1810         }
1811
1812         if ( !realms_realm_add(r, cs))
1813                 goto error;
1814
1815                 cf_log_info(cs, " }");
1816                 return 1;
1817
1818  error:
1819         cf_log_info(cs, " } # realm %s", name2);
1820         free(r);
1821         return 0;
1822 }
1823
1824 #ifdef WITH_COA
1825 static const FR_NAME_NUMBER home_server_types[] = {
1826         { "auth", HOME_TYPE_AUTH },
1827         { "auth+acct", HOME_TYPE_AUTH },
1828         { "acct", HOME_TYPE_ACCT },
1829         { "coa", HOME_TYPE_COA },
1830         { NULL, 0 }
1831 };
1832
1833 static int pool_peek_type(CONF_SECTION *config, CONF_SECTION *cs)
1834 {
1835         int home;
1836         const char *name, *type;
1837         CONF_PAIR *cp;
1838         CONF_SECTION *server_cs;
1839
1840         cp = cf_pair_find(cs, "home_server");
1841         if (!cp) {
1842                 cf_log_err(cf_sectiontoitem(cs), "Pool does not contain a \"home_server\" entry");
1843                 return HOME_TYPE_INVALID;
1844         }
1845
1846         name = cf_pair_value(cp);
1847         if (!name) {
1848                 cf_log_err(cf_pairtoitem(cp), "home_server entry does not reference a home server");
1849                 return HOME_TYPE_INVALID;
1850         }
1851
1852         server_cs = cf_section_sub_find_name2(config, "home_server", name);
1853         if (!server_cs) {
1854                 cf_log_err(cf_pairtoitem(cp), "home_server \"%s\" does not exist", name);
1855                 return HOME_TYPE_INVALID;
1856         }
1857
1858         cp = cf_pair_find(server_cs, "type");
1859         if (!cp) {
1860                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s does not contain a \"type\" entry", name);
1861                 return HOME_TYPE_INVALID;
1862         }
1863
1864         type = cf_pair_value(cp);
1865         if (!type) {
1866                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an empty \"type\" entry", name);
1867                 return HOME_TYPE_INVALID;
1868         }
1869
1870         home = fr_str2int(home_server_types, type, HOME_TYPE_INVALID);
1871         if (home == HOME_TYPE_INVALID) {
1872                 cf_log_err(cf_sectiontoitem(server_cs), "home_server %s contains an invalid \"type\" entry of value \"%s\"", name, type);
1873                 return HOME_TYPE_INVALID;
1874         }
1875
1876         return home;            /* 'cause we miss it so much */
1877 }
1878 #endif
1879
1880 int realms_init(CONF_SECTION *config)
1881 {
1882         CONF_SECTION *cs;
1883 #ifdef WITH_PROXY
1884         CONF_SECTION *server_cs;
1885 #endif
1886         realm_config_t *rc, *old_rc;
1887
1888         if (realms_byname) return 1;
1889
1890         realms_byname = rbtree_create(realm_name_cmp, free, 0);
1891         if (!realms_byname) {
1892                 realms_free();
1893                 return 0;
1894         }
1895
1896 #ifdef WITH_PROXY
1897         home_servers_byaddr = rbtree_create(home_server_addr_cmp, home_server_free, 0);
1898         if (!home_servers_byaddr) {
1899                 realms_free();
1900                 return 0;
1901         }
1902
1903         home_servers_byname = rbtree_create(home_server_name_cmp, NULL, 0);
1904         if (!home_servers_byname) {
1905                 realms_free();
1906                 return 0;
1907         }
1908
1909 #ifdef WITH_STATS
1910         home_servers_bynumber = rbtree_create(home_server_number_cmp, NULL, 0);
1911         if (!home_servers_bynumber) {
1912                 realms_free();
1913                 return 0;
1914         }
1915 #endif
1916
1917         home_pools_byname = rbtree_create(home_pool_name_cmp, NULL, 0);
1918         if (!home_pools_byname) {
1919                 realms_free();
1920                 return 0;
1921         }
1922 #endif
1923
1924         rc = rad_malloc(sizeof(*rc));
1925         memset(rc, 0, sizeof(*rc));
1926         rc->cs = config;
1927
1928 #ifdef WITH_PROXY
1929         cs = cf_subsection_find_next(config, NULL, "proxy");
1930         if (cs) {
1931                 cf_section_parse(cs, rc, proxy_config);
1932         } else {
1933                 rc->dead_time = DEAD_TIME;
1934                 rc->retry_count = RETRY_COUNT;
1935                 rc->retry_delay = RETRY_DELAY;
1936                 rc->fallback = 0;
1937                 rc->wake_all_if_all_dead= 0;
1938         }
1939
1940         for (cs = cf_subsection_find_next(config, NULL, "home_server");
1941              cs != NULL;
1942              cs = cf_subsection_find_next(config, cs, "home_server")) {
1943                 if (!home_server_add(rc, cs)) {
1944                         free(rc);
1945                         realms_free();
1946                         return 0;
1947                 }
1948         }
1949
1950         /*
1951          *      Loop over virtual servers to find homes which are
1952          *      defined in them.
1953          */
1954         for (server_cs = cf_subsection_find_next(config, NULL, "server");
1955              server_cs != NULL;
1956              server_cs = cf_subsection_find_next(config, server_cs, "server")) {
1957                 for (cs = cf_subsection_find_next(server_cs, NULL, "home_server");
1958                      cs != NULL;
1959                      cs = cf_subsection_find_next(server_cs, cs, "home_server")) {
1960                         if (!home_server_add(rc, cs)) {
1961                                 free(rc);
1962                                 realms_free();
1963                                 return 0;
1964                         }
1965                 }
1966         }
1967 #endif
1968
1969         for (cs = cf_subsection_find_next(config, NULL, "realm");
1970              cs != NULL;
1971              cs = cf_subsection_find_next(config, cs, "realm")) {
1972                 if (!realm_add(rc, cs)) {
1973                         free(rc);
1974                         realms_free();
1975                         return 0;
1976                 }
1977         }
1978
1979 #ifdef WITH_COA
1980         /*
1981          *      CoA pools aren't necessarily tied to realms.
1982          */
1983         for (cs = cf_subsection_find_next(config, NULL, "home_server_pool");
1984              cs != NULL;
1985              cs = cf_subsection_find_next(config, cs, "home_server_pool")) {
1986                 int type;
1987
1988                 /*
1989                  *      Pool was already loaded.
1990                  */
1991                 if (cf_data_find(cs, "home_server_pool")) continue;
1992
1993                 type = pool_peek_type(config, cs);
1994                 if (type == HOME_TYPE_INVALID) {
1995                         free(rc);
1996                         realms_free();
1997                         return 0;
1998                 }
1999
2000                 if (!server_pool_add(rc, cs, type, TRUE)) {
2001                         free(rc);
2002                         realms_free();
2003                         return 0;
2004                 }
2005         }
2006 #endif
2007
2008
2009 #ifdef WITH_PROXY
2010         xlat_register("home_server", xlat_home_server, NULL);
2011         xlat_register("home_server_pool", xlat_server_pool, NULL);
2012 #endif
2013
2014         /*
2015          *      Swap pointers atomically.
2016          */
2017         old_rc = realm_config;
2018         realm_config = rc;
2019         free(old_rc);
2020
2021         return 1;
2022 }
2023
2024 /*
2025  *      Find a realm where "name" might be the regex.
2026  */
2027 REALM *realm_find2(const char *name)
2028 {
2029         REALM myrealm;
2030         REALM *realm;
2031
2032         if (!name) name = "NULL";
2033
2034         myrealm.name = name;
2035         realm = rbtree_finddata(realms_byname, &myrealm);
2036         if (realm) return realm;
2037
2038 #ifdef HAVE_REGEX_H
2039         if (realms_regex) {
2040                 realm_regex_t *this;
2041
2042                 for (this = realms_regex; this != NULL; this = this->next) {
2043                         if (strcmp(this->realm->name, name) == 0) {
2044                                 return this->realm;
2045                         }
2046                 }
2047         }
2048 #endif
2049
2050         /*
2051          *      Couldn't find a realm.  Look for DEFAULT.
2052          */
2053         myrealm.name = "DEFAULT";
2054         return rbtree_finddata(realms_byname, &myrealm);
2055 }
2056
2057
2058 /*
2059  *      Find a realm in the REALM list.
2060  */
2061 REALM *realm_find(const char *name)
2062 {
2063         REALM myrealm;
2064         REALM *realm;
2065
2066         if (!name) name = "NULL";
2067
2068         myrealm.name = name;
2069         realm = rbtree_finddata(realms_byname, &myrealm);
2070         if (realm) return realm;
2071
2072 #ifdef HAVE_REGEX_H
2073         if (realms_regex) {
2074                 realm_regex_t *this;
2075
2076                 for (this = realms_regex; this != NULL; this = this->next) {
2077                         int compare;
2078                         regex_t reg;
2079
2080                         /*
2081                          *      Include substring matches.
2082                          */
2083                         if (regcomp(&reg, this->realm->name + 1,
2084                                     REG_EXTENDED | REG_NOSUB | REG_ICASE) != 0) {
2085                                 continue;
2086                         }
2087
2088                         compare = regexec(&reg, name, 0, NULL, 0);
2089                         regfree(&reg);
2090
2091                         if (compare == 0) return this->realm;
2092                 }
2093         }
2094 #endif
2095
2096         /*
2097          *      Couldn't find a realm.  Look for DEFAULT.
2098          */
2099         myrealm.name = "DEFAULT";
2100         return rbtree_finddata(realms_byname, &myrealm);
2101 }
2102
2103
2104 #ifdef WITH_PROXY
2105
2106 /*
2107  *      Allocate the proxy list if it doesn't already exist, and copy request
2108  *      VPs into it. Setup src/dst IP addresses based on home server, and
2109  *      calculate and add the message-authenticator.
2110  *
2111  *      This is a distinct function from home_server_ldb, as not all home_server
2112  *      lookups result in the *CURRENT* request being proxied,
2113  *      as in rlm_replicate, and this may trigger asserts elsewhere in the
2114  *      server.
2115  */
2116 void home_server_update_request(home_server *home, REQUEST *request)
2117 {
2118
2119         /*
2120          *      Allocate the proxy packet, only if it wasn't
2121          *      already allocated by a module.  This check is
2122          *      mainly to support the proxying of EAP-TTLS and
2123          *      EAP-PEAP tunneled requests.
2124          *
2125          *      In those cases, the EAP module creates a
2126          *      "fake" request, and recursively passes it
2127          *      through the authentication stage of the
2128          *      server.  The module then checks if the request
2129          *      was supposed to be proxied, and if so, creates
2130          *      a proxy packet from the TUNNELED request, and
2131          *      not from the EAP request outside of the
2132          *      tunnel.
2133          *
2134          *      The proxy then works like normal, except that
2135          *      the response packet is "eaten" by the EAP
2136          *      module, and encapsulated into an EAP packet.
2137          */
2138         if (!request->proxy) {
2139                 if ((request->proxy = rad_alloc(TRUE)) == NULL) {
2140                         radlog(L_ERR|L_CONS, "no memory");
2141                         exit(1);
2142                 }
2143
2144                 /*
2145                  *      Copy the request, then look up name
2146                  *      and plain-text password in the copy.
2147                  *
2148                  *      Note that the User-Name attribute is
2149                  *      the *original* as sent over by the
2150                  *      client.  The Stripped-User-Name
2151                  *      attribute is the one hacked through
2152                  *      the 'hints' file.
2153                  */
2154                 request->proxy->vps =  paircopy(request->packet->vps);
2155         }
2156
2157         /*
2158          *      Update the various fields as appropriate.
2159          */
2160         request->proxy->src_ipaddr = home->src_ipaddr;
2161         request->proxy->src_port = 0;
2162         request->proxy->dst_ipaddr = home->ipaddr;
2163         request->proxy->dst_port = home->port;
2164         request->home_server = home;
2165
2166         /*
2167          *      We're supposed to add a Message-Authenticator
2168          *      if it doesn't exist, and it doesn't exist.
2169          */
2170         if (home->message_authenticator &&
2171             (request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2172             !pairfind(request->proxy->vps, PW_MESSAGE_AUTHENTICATOR, 0, TAG_ANY)) {
2173                 radius_pairmake(request, &request->proxy->vps,
2174                                 "Message-Authenticator", "0x00",
2175                                 T_OP_SET);
2176         }
2177 }
2178
2179 home_server *home_server_ldb(const char *realmname,
2180                              home_pool_t *pool, REQUEST *request)
2181 {
2182         int             start;
2183         int             count;
2184         home_server     *found = NULL;
2185         home_server     *zombie = NULL;
2186         VALUE_PAIR      *vp;
2187
2188         /*
2189          *      Determine how to pick choose the home server.
2190          */
2191         switch (pool->type) {
2192                 uint32_t hash;
2193
2194                 /*
2195                  *      For load-balancing by client IP address, we
2196                  *      pick a home server by hashing the client IP.
2197                  *
2198                  *      This isn't as even a load distribution as
2199                  *      tracking the State attribute, but it's better
2200                  *      than nothing.
2201                  */
2202         case HOME_POOL_CLIENT_BALANCE:
2203                 switch (request->packet->src_ipaddr.af) {
2204                 case AF_INET:
2205                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip4addr,
2206                                          sizeof(request->packet->src_ipaddr.ipaddr.ip4addr));
2207                         break;
2208                 case AF_INET6:
2209                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip6addr,
2210                                          sizeof(request->packet->src_ipaddr.ipaddr.ip6addr));
2211                         break;
2212                 default:
2213                         hash = 0;
2214                         break;
2215                 }
2216                 start = hash % pool->num_home_servers;
2217                 break;
2218
2219         case HOME_POOL_CLIENT_PORT_BALANCE:
2220                 switch (request->packet->src_ipaddr.af) {
2221                 case AF_INET:
2222                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip4addr,
2223                                          sizeof(request->packet->src_ipaddr.ipaddr.ip4addr));
2224                         break;
2225                 case AF_INET6:
2226                         hash = fr_hash(&request->packet->src_ipaddr.ipaddr.ip6addr,
2227                                          sizeof(request->packet->src_ipaddr.ipaddr.ip6addr));
2228                         break;
2229                 default:
2230                         hash = 0;
2231                         break;
2232                 }
2233                 fr_hash_update(&request->packet->src_port,
2234                                  sizeof(request->packet->src_port), hash);
2235                 start = hash % pool->num_home_servers;
2236                 break;
2237
2238         case HOME_POOL_KEYED_BALANCE:
2239                 if ((vp = pairfind(request->config_items, PW_LOAD_BALANCE_KEY, 0, TAG_ANY)) != NULL) {
2240                         hash = fr_hash(vp->vp_strvalue, vp->length);
2241                         start = hash % pool->num_home_servers;
2242                         break;
2243                 }
2244                 /* FALL-THROUGH */
2245
2246         case HOME_POOL_LOAD_BALANCE:
2247         case HOME_POOL_FAIL_OVER:
2248                 start = 0;
2249                 break;
2250
2251         default:                /* this shouldn't happen... */
2252                 start = 0;
2253                 break;
2254
2255         }
2256
2257         /*
2258          *      Starting with the home server we chose, loop through
2259          *      all home servers.  If the current one is dead, skip
2260          *      it.  If it is too busy, skip it.
2261          *
2262          *      Otherwise, use it.
2263          */
2264         for (count = 0; count < pool->num_home_servers; count++) {
2265                 home_server *home = pool->servers[(start + count) % pool->num_home_servers];
2266
2267                 if (!home) continue;
2268
2269                 /*
2270                  *      Skip dead home servers.
2271                  *
2272                  *      Home servers that are unknown, alive, or zombie
2273                  *      are used for proxying.
2274                  */
2275                 if (home->state == HOME_STATE_IS_DEAD) {
2276                         continue;
2277                 }
2278
2279                 /*
2280                  *      This home server is too busy.  Choose another one.
2281                  */
2282                 if (home->currently_outstanding >= home->max_outstanding) {
2283                         continue;
2284                 }
2285
2286 #ifdef WITH_DETAIL
2287                 /*
2288                  *      We read the packet from a detail file, AND it
2289                  *      came from this server.  Don't re-proxy it
2290                  *      there.
2291                  */
2292                 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
2293                     (request->packet->code == PW_ACCOUNTING_REQUEST) &&
2294                     (fr_ipaddr_cmp(&home->ipaddr, &request->packet->src_ipaddr) == 0)) {
2295                         continue;
2296                 }
2297 #endif
2298
2299                 /*
2300                  *      Default virtual: ignore homes tied to a
2301                  *      virtual.
2302                  */
2303                 if (!request->server && home->parent_server) {
2304                         continue;
2305                 }
2306
2307                 /*
2308                  *      A virtual AND home is tied to virtual,
2309                  *      ignore ones which don't match.
2310                  */
2311                 if (request->server && home->parent_server &&
2312                     strcmp(request->server, home->parent_server) != 0) {
2313                         continue;
2314                 }
2315
2316                 /*
2317                  *      Allow request->server && !home->parent_server
2318                  *
2319                  *      i.e. virtuals can proxy to globally defined
2320                  *      homes.
2321                  */
2322
2323                 /*
2324                  *      It's zombie, so we remember the first zombie
2325                  *      we find, but we don't mark it as a "live"
2326                  *      server.
2327                  */
2328                 if (home->state == HOME_STATE_ZOMBIE) {
2329                         if (!zombie) zombie = home;
2330                         continue;
2331                 }
2332
2333                 /*
2334                  *      We've found the first "live" one.  Use that.
2335                  */
2336                 if (pool->type != HOME_POOL_LOAD_BALANCE) {
2337                         found = home;
2338                         break;
2339                 }
2340
2341                 /*
2342                  *      Otherwise we're doing some kind of load balancing.
2343                  *      If we haven't found one yet, pick this one.
2344                  */
2345                 if (!found) {
2346                         found = home;
2347                         continue;
2348                 }
2349
2350                 RDEBUG3("PROXY %s %d\t%s %d",
2351                        found->name, found->currently_outstanding,
2352                        home->name, home->currently_outstanding);
2353
2354                 /*
2355                  *      Prefer this server if it's less busy than the
2356                  *      one we had previously found.
2357                  */
2358                 if (home->currently_outstanding < found->currently_outstanding) {
2359                         RDEBUG3("PROXY Choosing %s: It's less busy than %s",
2360                                home->name, found->name);
2361                         found = home;
2362                         continue;
2363                 }
2364
2365                 /*
2366                  *      Ignore servers which are busier than the one
2367                  *      we found.
2368                  */
2369                 if (home->currently_outstanding > found->currently_outstanding) {
2370                         RDEBUG3("PROXY Skipping %s: It's busier than %s",
2371                                home->name, found->name);
2372                         continue;
2373                 }
2374
2375                 /*
2376                  *      From the list of servers which have the same
2377                  *      load, choose one at random.
2378                  */
2379                 if (((count + 1) * (fr_rand() & 0xffff)) < (uint32_t) 0x10000) {
2380                         found = home;
2381                 }
2382         } /* loop over the home servers */
2383
2384         /*
2385          *      We have no live servers, BUT we have a zombie.  Use
2386          *      the zombie as a last resort.
2387          */
2388         if (!found && zombie) {
2389                 found = zombie;
2390                 zombie = NULL;
2391         }
2392
2393         /*
2394          *      There's a fallback if they're all dead.
2395          */
2396         if (!found && pool->fallback) {
2397                 found = pool->fallback;
2398
2399                 DEBUG("WARNING: Home server pool %s failing over to fallback %s",
2400                       pool->name, found->server);
2401                 if (pool->in_fallback) goto update_and_return;
2402
2403                 pool->in_fallback = TRUE;
2404
2405                 /*
2406                  *      Run the trigger once an hour saying that
2407                  *      they're all dead.
2408                  */
2409                 if ((pool->time_all_dead + 3600) < request->timestamp) {
2410                         pool->time_all_dead = request->timestamp;
2411                         exec_trigger(request, pool->cs, "home_server_pool.fallback", FALSE);
2412                 }
2413         }
2414
2415         if (found) {
2416         update_and_return:
2417                 if ((found != pool->fallback) && pool->in_fallback) {
2418                         pool->in_fallback = FALSE;
2419                         exec_trigger(request, pool->cs, "home_server_pool.normal", FALSE);
2420                 }
2421
2422                 return found;
2423         }
2424
2425         /*
2426          *      No live match found, and no fallback to the "DEFAULT"
2427          *      realm.  We fix this by blindly marking all servers as
2428          *      "live".  But only do it for ones that don't support
2429          *      "pings", as they will be marked live when they
2430          *      actually are live.
2431          */
2432         if (!realm_config->fallback &&
2433             realm_config->wake_all_if_all_dead) {
2434                 for (count = 0; count < pool->num_home_servers; count++) {
2435                         home_server *home = pool->servers[count];
2436
2437                         if (!home) continue;
2438
2439                         if ((home->state == HOME_STATE_IS_DEAD) &&
2440                             (home->ping_check == HOME_PING_CHECK_NONE)) {
2441                                 home->state = HOME_STATE_ALIVE;
2442                                 if (!found) found = home;
2443                         }
2444                 }
2445
2446                 if (found) goto update_and_return;
2447         }
2448
2449         /*
2450          *      Still nothing.  Look up the DEFAULT realm, but only
2451          *      if we weren't looking up the NULL or DEFAULT realms.
2452          */
2453         if (realm_config->fallback &&
2454             realmname &&
2455             (strcmp(realmname, "NULL") != 0) &&
2456             (strcmp(realmname, "DEFAULT") != 0)) {
2457                 REALM *rd = realm_find("DEFAULT");
2458
2459                 if (!rd) return NULL;
2460
2461                 pool = NULL;
2462                 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2463                         pool = rd->auth_pool;
2464
2465                 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2466                         pool = rd->acct_pool;
2467                 }
2468                 if (!pool) return NULL;
2469
2470                 RDEBUG2("PROXY - realm %s has no live home servers.  Falling back to the DEFAULT realm.", realmname);
2471                 return home_server_ldb(rd->name, pool, request);
2472         }
2473
2474         /*
2475          *      Still haven't found anything.  Oh well.
2476          */
2477         return NULL;
2478 }
2479
2480
2481 home_server *home_server_find(fr_ipaddr_t *ipaddr, int port, int proto)
2482 {
2483         home_server myhome;
2484
2485         memset(&myhome, 0, sizeof(myhome));
2486         myhome.ipaddr = *ipaddr;
2487         myhome.src_ipaddr.af = ipaddr->af;
2488         myhome.port = port;
2489 #ifdef WITH_TCP
2490         myhome.proto = proto;
2491 #else
2492         myhome.proto = IPPROTO_UDP;
2493 #endif
2494         myhome.server = NULL;   /* we're not called for internal proxying */
2495
2496         return rbtree_finddata(home_servers_byaddr, &myhome);
2497 }
2498
2499 #ifdef WITH_COA
2500 home_server *home_server_byname(const char *name, int type)
2501 {
2502         home_server myhome;
2503
2504         memset(&myhome, 0, sizeof(myhome));
2505         myhome.type = type;
2506         myhome.name = name;
2507
2508         return rbtree_finddata(home_servers_byname, &myhome);
2509 }
2510 #endif
2511
2512 #ifdef WITH_STATS
2513 home_server *home_server_bynumber(int number)
2514 {
2515         home_server myhome;
2516
2517         memset(&myhome, 0, sizeof(myhome));
2518         myhome.number = number;
2519         myhome.server = NULL;   /* we're not called for internal proxying */
2520
2521         return rbtree_finddata(home_servers_bynumber, &myhome);
2522 }
2523 #endif
2524
2525 home_pool_t *home_pool_byname(const char *name, int type)
2526 {
2527         home_pool_t mypool;
2528
2529         memset(&mypool, 0, sizeof(mypool));
2530         mypool.name = name;
2531         mypool.server_type = type;
2532         return rbtree_finddata(home_pools_byname, &mypool);
2533 }
2534
2535 #endif