src/main/client.c

   1 /*
   2  * client.c     Read clients into memory.
   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 2000,2006  The FreeRADIUS server project
  21  * Copyright 2000  Miquel van Smoorenburg <miquels@cistron.nl>
  22  * Copyright 2000  Alan DeKok <aland@ox.org>
  23  */
  24
  25 #include <freeradius-devel/ident.h>
  26 RCSID("$Id$")
  27
  28 #include <freeradius-devel/radiusd.h>
  29 #include <freeradius-devel/rad_assert.h>
  30
  31 #include <sys/stat.h>
  32
  33 #include <ctype.h>
  34 #include <fcntl.h>
  35
  36 #ifdef WITH_DYNAMIC_CLIENTS
  37 #ifdef HAVE_DIRENT_H
  38 #include <dirent.h>
  39 #endif
  40 #endif
  41
  42 struct radclient_list {
  43         /*
  44          *      FIXME: One set of trees for IPv4, and another for IPv6?
  45          */
  46         rbtree_t        *trees[129]; /* for 0..128, inclusive. */
  47         int             min_prefix;
  48 };
  49
  50
  51 #ifdef WITH_STATS
  52 static rbtree_t         *tree_num = NULL;     /* client numbers 0..N */
  53 static int              tree_num_max = 0;
  54 #endif
  55 static RADCLIENT_LIST   *root_clients = NULL;
  56
  57 #ifdef WITH_DYNAMIC_CLIENTS
  58 static fr_fifo_t        *deleted_clients = NULL;
  59 #endif
  60
  61 /*
  62  *      Callback for freeing a client.
  63  */
  64 void client_free(RADCLIENT *client)
  65 {
  66 #ifdef WITH_DYNAMIC_CLIENTS
  67         if (client->dynamic == 2) {
  68                 time_t now;
  69
  70                 if (!deleted_clients) {
  71                         deleted_clients = fr_fifo_create(1024,
  72                                                          (void *) client_free);
  73                         if (!deleted_clients) return; /* MEMLEAK */
  74                 }
  75
  76                 /*
  77                  *      Mark it as in the fifo, and remember when we
  78                  *      pushed it.
  79                  */
  80                 client->dynamic = 3;
  81                 client->created = now = time(NULL); /* re-set it */
  82                 fr_fifo_push(deleted_clients, client);
  83
  84                 /*
  85                  *      Peek at the head of the fifo.  If it might
  86                  *      still be in use, return.  Otherwise, pop it
  87                  *      from the queue and delete it.
  88                  */
  89                 client = fr_fifo_peek(deleted_clients);
  90                 if ((client->created + 120) >= now) return;
  91
  92                 client = fr_fifo_pop(deleted_clients);
  93                 rad_assert(client != NULL);
  94         }
  95 #endif
  96
  97         free(client->longname);
  98         free(client->secret);
  99         free(client->shortname);
 100         free(client->nastype);
 101         free(client->login);
 102         free(client->password);
 103         free(client->server);
 104
 105 #ifdef WITH_STATS
 106         free(client->auth);
 107 #ifdef WITH_ACCOUNTING
 108         free(client->acct);
 109 #endif
 110 #endif
 111
 112 #ifdef WITH_DYNAMIC_CLIENTS
 113         free(client->client_server);
 114 #endif
 115
 116         free(client);
 117 }
 118
 119 /*
 120  *      Callback for comparing two clients.
 121  */
 122 static int client_ipaddr_cmp(const void *one, const void *two)
 123 {
 124         const RADCLIENT *a = one;
 125         const RADCLIENT *b = two;
 126 #ifndef WITH_TCP
 127
 128         return fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
 129 #else
 130         int rcode;
 131
 132         rcode = fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
 133         if (rcode != 0) return rcode;
 134
 135         /*
 136          *      Wildcard match
 137          */
 138         if ((a->proto == IPPROTO_IP) ||
 139             (b->proto == IPPROTO_IP)) return 0;
 140
 141         return (a->proto - b->proto);
 142 #endif
 143 }
 144
 145 #ifdef WITH_STATS
 146 static int client_num_cmp(const void *one, const void *two)
 147 {
 148         const RADCLIENT *a = one;
 149         const RADCLIENT *b = two;
 150
 151         return (a->number - b->number);
 152 }
 153 #endif
 154
 155 /*
 156  *      Free a RADCLIENT list.
 157  */
 158 void clients_free(RADCLIENT_LIST *clients)
 159 {
 160         int i;
 161
 162         if (!clients) return;
 163
 164         for (i = 0; i <= 128; i++) {
 165                 if (clients->trees[i]) rbtree_free(clients->trees[i]);
 166                 clients->trees[i] = NULL;
 167         }
 168
 169         if (clients == root_clients) {
 170 #ifdef WITH_STATS
 171                 if (tree_num) rbtree_free(tree_num);
 172                 tree_num = NULL;
 173                 tree_num_max = 0;
 174 #endif
 175                 root_clients = NULL;
 176         }
 177
 178 #ifdef WITH_DYNAMIC_CLIENTS
 179         /*
 180          *      FIXME: No fr_fifo_delete()
 181          */
 182 #endif
 183
 184         free(clients);
 185 }
 186
 187 /*
 188  *      Return a new, initialized, set of clients.
 189  */
 190 RADCLIENT_LIST *clients_init(void)
 191 {
 192         RADCLIENT_LIST *clients = calloc(1, sizeof(RADCLIENT_LIST));
 193
 194         if (!clients) return NULL;
 195
 196         clients->min_prefix = 128;
 197
 198         return clients;
 199 }
 200
 201
 202 /*
 203  *      Sanity check a client.
 204  */
 205 static int client_sane(RADCLIENT *client)
 206 {
 207         switch (client->ipaddr.af) {
 208         case AF_INET:
 209                 if (client->prefix > 32) {
 210                         return 0;
 211                 }
 212
 213                 /*
 214                  *      Zero out the subnet bits.
 215                  */
 216                 if (client->prefix == 0) {
 217                         memset(&client->ipaddr.ipaddr.ip4addr, 0,
 218                                sizeof(client->ipaddr.ipaddr.ip4addr));
 219
 220                 } else if (client->prefix < 32) {
 221                         uint32_t mask = ~0;
 222
 223                         mask <<= (32 - client->prefix);
 224                         client->ipaddr.ipaddr.ip4addr.s_addr &= htonl(mask);
 225                 }
 226                 break;
 227
 228         case AF_INET6:
 229                 if (client->prefix > 128) return 0;
 230
 231                 if (client->prefix == 0) {
 232                         memset(&client->ipaddr.ipaddr.ip6addr, 0,
 233                                sizeof(client->ipaddr.ipaddr.ip6addr));
 234
 235                 } else if (client->prefix < 128) {
 236                         uint32_t mask, *addr;
 237
 238                         addr = (uint32_t *) &client->ipaddr.ipaddr.ip6addr;
 239
 240                         if ((client->prefix & 0x1f) == 0) {
 241                                 mask = 0;
 242                         } else {
 243                                 mask = ~ ((uint32_t) 0);
 244                                 mask <<= (32 - (client->prefix & 0x1f));
 245                                 mask = htonl(mask);
 246                         }
 247
 248                         switch (client->prefix >> 5) {
 249                         case 0:
 250                                 addr[0] &= mask;
 251                                 mask = 0;
 252                                 /* FALL-THROUGH */
 253                         case 1:
 254                                 addr[1] &= mask;
 255                                 mask = 0;
 256                                 /* FALL-THROUGH */
 257                         case 2:
 258                                 addr[2] &= mask;
 259                                 mask = 0;
 260                                 /* FALL-THROUGH */
 261                         case 3:
 262                                 addr[3] &= mask;
 263                           break;
 264                         }
 265                 }
 266                 break;
 267
 268         default:
 269                 return 0;
 270         }
 271
 272         return 1;
 273 }
 274
 275
 276 /*
 277  *      Add a client to the tree.
 278  */
 279 int client_add(RADCLIENT_LIST *clients, RADCLIENT *client)
 280 {
 281         RADCLIENT *old;
 282
 283         if (!client) {
 284                 return 0;
 285         }
 286
 287         /*
 288          *      If "clients" is NULL, it means add to the global list.
 289          */
 290         if (!clients) {
 291                 /*
 292                  *      Initialize it, if not done already.
 293                  */
 294                 if (!root_clients) {
 295                         root_clients = clients_init();
 296                         if (!root_clients) return 0;
 297                 }
 298                 clients = root_clients;
 299         }
 300
 301         if ((client->prefix < 0) || (client->prefix > 128)) {
 302                 return 0;
 303         }
 304
 305         if (!client_sane(client)) return 0;
 306
 307         /*
 308          *      Create a tree for it.
 309          */
 310         if (!clients->trees[client->prefix]) {
 311                 clients->trees[client->prefix] = rbtree_create(client_ipaddr_cmp,
 312                                                                (void *) client_free, 0);
 313                 if (!clients->trees[client->prefix]) {
 314                         return 0;
 315                 }
 316         }
 317
 318 #define namecmp(a) ((!old->a && !client->a) || (old->a && client->a && (strcmp(old->a, client->a) == 0)))
 319
 320         /*
 321          *      Cannot insert the same client twice.
 322          */
 323         old = rbtree_finddata(clients->trees[client->prefix], client);
 324         if (old) {
 325                 /*
 326                  *      If it's a complete duplicate, then free the new
 327                  *      one, and return "OK".
 328                  */
 329                 if ((fr_ipaddr_cmp(&old->ipaddr, &client->ipaddr) == 0) &&
 330                     (old->prefix == client->prefix) &&
 331                     namecmp(longname) && namecmp(secret) &&
 332                     namecmp(shortname) && namecmp(nastype) &&
 333                     namecmp(login) && namecmp(password) && namecmp(server) &&
 334 #ifdef WITH_DYNAMIC_CLIENTS
 335                     (old->lifetime == client->lifetime) &&
 336                     namecmp(client_server) &&
 337 #endif
 338 #ifdef WITH_COA
 339                     namecmp(coa_name) &&
 340                     (old->coa_server == client->coa_server) &&
 341                     (old->coa_pool == client->coa_pool) &&
 342 #endif
 343                     (old->message_authenticator == client->message_authenticator)) {
 344                         DEBUG("WARNING: Ignoring duplicate client %s", client->longname);
 345                         client_free(client);
 346                         return 1;
 347                 }
 348
 349                 radlog(L_ERR, "Failed to add duplicate client %s",
 350                        client->shortname);
 351                 return 0;
 352         }
 353 #undef namecmp
 354
 355         /*
 356          *      Other error adding client: likely is fatal.
 357          */
 358         if (!rbtree_insert(clients->trees[client->prefix], client)) {
 359                 return 0;
 360         }
 361
 362 #ifdef WITH_STATS
 363         if (!tree_num) {
 364                 tree_num = rbtree_create(client_num_cmp, NULL, 0);
 365         }
 366
 367
 368         /*
 369          *      Catch clients added by rlm_sql.
 370          */
 371         if (!client->auth) {
 372                 client->auth = rad_malloc(sizeof(*client->auth));
 373                 memset(client->auth, 0, sizeof(*client->auth));
 374         }
 375
 376 #ifdef WITH_ACCOUNTING
 377         if (!client->acct) {
 378                 client->acct = rad_malloc(sizeof(*client->acct));
 379                 memset(client->acct, 0, sizeof(*client->acct));
 380         }
 381 #endif
 382
 383 #ifdef WITH_DYNAMIC_CLIENTS
 384         /*
 385          *      More catching of clients added by rlm_sql.
 386          *
 387          *      The sql modules sets the dynamic flag BEFORE calling
 388          *      us.  The client_create() function sets it AFTER
 389          *      calling us.
 390          */
 391         if (client->dynamic && (client->lifetime == 0)) {
 392                 RADCLIENT *network;
 393
 394                 /*
 395                  *      If there IS an enclosing network,
 396                  *      inherit the lifetime from it.
 397                  */
 398                 network = client_find(clients, &client->ipaddr, client->proto);
 399                 if (network) {
 400                         client->lifetime = network->lifetime;
 401                 }
 402         }
 403 #endif
 404
 405         client->number = tree_num_max;
 406         tree_num_max++;
 407         if (tree_num) rbtree_insert(tree_num, client);
 408 #endif
 409
 410         if (client->prefix < clients->min_prefix) {
 411                 clients->min_prefix = client->prefix;
 412         }
 413
 414         return 1;
 415 }
 416
 417
 418 #ifdef WITH_DYNAMIC_CLIENTS
 419 void client_delete(RADCLIENT_LIST *clients, RADCLIENT *client)
 420 {
 421         if (!clients || !client) return;
 422
 423         rad_assert((client->prefix >= 0) && (client->prefix <= 128));
 424
 425         client->dynamic = 2;    /* signal to client_free */
 426
 427         rbtree_deletebydata(tree_num, client);
 428         rbtree_deletebydata(clients->trees[client->prefix], client);
 429 }
 430 #endif
 431
 432
 433 /*
 434  *      Find a client in the RADCLIENTS list by number.
 435  *      This is a support function for the statistics code.
 436  */
 437 RADCLIENT *client_findbynumber(const RADCLIENT_LIST *clients,
 438                                int number)
 439 {
 440 #ifdef WITH_STATS
 441         if (!clients) clients = root_clients;
 442
 443         if (!clients) return NULL;
 444
 445         if (number >= tree_num_max) return NULL;
 446
 447         if (tree_num) {
 448                 RADCLIENT myclient;
 449
 450                 myclient.number = number;
 451
 452                 return rbtree_finddata(tree_num, &myclient);
 453         }
 454 #else
 455         clients = clients;      /* -Wunused */
 456         number = number;        /* -Wunused */
 457 #endif
 458         return NULL;
 459 }
 460
 461
 462 /*
 463  *      Find a client in the RADCLIENTS list.
 464  */
 465 RADCLIENT *client_find(const RADCLIENT_LIST *clients,
 466                        const fr_ipaddr_t *ipaddr, int proto)
 467 {
 468         int i, max_prefix;
 469         RADCLIENT myclient;
 470
 471         if (!clients) clients = root_clients;
 472
 473         if (!clients || !ipaddr) return NULL;
 474
 475         switch (ipaddr->af) {
 476         case AF_INET:
 477                 max_prefix = 32;
 478                 break;
 479
 480         case AF_INET6:
 481                 max_prefix = 128;
 482                 break;
 483
 484         default :
 485                 return NULL;
 486         }
 487
 488         for (i = max_prefix; i >= clients->min_prefix; i--) {
 489                 void *data;
 490
 491                 myclient.prefix = i;
 492                 myclient.ipaddr = *ipaddr;
 493                 myclient.proto = proto;
 494                 client_sane(&myclient); /* clean up the ipaddress */
 495
 496                 if (!clients->trees[i]) continue;
 497
 498                 data = rbtree_finddata(clients->trees[i], &myclient);
 499                 if (data) {
 500                         return data;
 501                 }
 502         }
 503
 504         return NULL;
 505 }
 506
 507
 508 /*
 509  *      Old wrapper for client_find
 510  */
 511 RADCLIENT *client_find_old(const fr_ipaddr_t *ipaddr)
 512 {
 513         return client_find(root_clients, ipaddr, IPPROTO_UDP);
 514 }
 515
 516 static struct in_addr cl_ip4addr;
 517 static struct in6_addr cl_ip6addr;
 518 #ifdef WITH_TCP
 519 static char *hs_proto = NULL;
 520 #endif
 521
 522 static const CONF_PARSER client_config[] = {
 523         { "ipaddr",  PW_TYPE_IPADDR,
 524           0, &cl_ip4addr,  NULL },
 525         { "ipv6addr",  PW_TYPE_IPV6ADDR,
 526           0, &cl_ip6addr, NULL },
 527         { "netmask",  PW_TYPE_INTEGER,
 528           offsetof(RADCLIENT, prefix), 0, NULL },
 529
 530         { "require_message_authenticator",  PW_TYPE_BOOLEAN,
 531           offsetof(RADCLIENT, message_authenticator), 0, "no" },
 532
 533         { "secret",  PW_TYPE_STRING_PTR,
 534           offsetof(RADCLIENT, secret), 0, NULL },
 535         { "shortname",  PW_TYPE_STRING_PTR,
 536           offsetof(RADCLIENT, shortname), 0, NULL },
 537         { "nastype",  PW_TYPE_STRING_PTR,
 538           offsetof(RADCLIENT, nastype), 0, NULL },
 539         { "login",  PW_TYPE_STRING_PTR,
 540           offsetof(RADCLIENT, login), 0, NULL },
 541         { "password",  PW_TYPE_STRING_PTR,
 542           offsetof(RADCLIENT, password), 0, NULL },
 543         { "virtual_server",  PW_TYPE_STRING_PTR,
 544           offsetof(RADCLIENT, server), 0, NULL },
 545         { "server",  PW_TYPE_STRING_PTR, /* compatability with 2.0-pre */
 546           offsetof(RADCLIENT, server), 0, NULL },
 547
 548 #ifdef WITH_TCP
 549         { "proto",  PW_TYPE_STRING_PTR,
 550           0, &hs_proto, NULL },
 551         { "max_connections",  PW_TYPE_INTEGER,
 552           offsetof(RADCLIENT, max_connections), 0, "16" },
 553 #endif
 554
 555 #ifdef WITH_DYNAMIC_CLIENTS
 556         { "dynamic_clients",  PW_TYPE_STRING_PTR,
 557           offsetof(RADCLIENT, client_server), 0, NULL },
 558         { "lifetime",  PW_TYPE_INTEGER,
 559           offsetof(RADCLIENT, lifetime), 0, NULL },
 560         { "rate_limit",  PW_TYPE_BOOLEAN,
 561           offsetof(RADCLIENT, rate_limit), 0, NULL },
 562 #endif
 563
 564 #ifdef WITH_COA
 565         { "coa_server",  PW_TYPE_STRING_PTR,
 566           offsetof(RADCLIENT, coa_name), 0, NULL },
 567 #endif
 568
 569         { NULL, -1, 0, NULL, NULL }
 570 };
 571
 572
 573 static RADCLIENT *client_parse(CONF_SECTION *cs, int in_server)
 574 {
 575         RADCLIENT       *c;
 576         const char      *name2;
 577
 578         name2 = cf_section_name2(cs);
 579         if (!name2) {
 580                 cf_log_err(cf_sectiontoitem(cs),
 581                            "Missing client name");
 582                 return NULL;
 583         }
 584
 585         /*
 586          * The size is fine.. Let's create the buffer
 587          */
 588         c = rad_malloc(sizeof(*c));
 589         memset(c, 0, sizeof(*c));
 590         c->cs = cs;
 591
 592 #ifdef WITH_STATS
 593         c->auth = rad_malloc(sizeof(*c->auth));
 594         memset(c->auth, 0, sizeof(*c->auth));
 595
 596 #ifdef WITH_ACCOUNTING
 597         c->acct = rad_malloc(sizeof(*c->acct));
 598         memset(c->acct, 0, sizeof(*c->acct));
 599 #endif
 600 #endif
 601
 602         memset(&cl_ip4addr, 0, sizeof(cl_ip4addr));
 603         memset(&cl_ip6addr, 0, sizeof(cl_ip6addr));
 604         c->prefix = -1;
 605
 606         if (cf_section_parse(cs, c, client_config) < 0) {
 607                 cf_log_err(cf_sectiontoitem(cs),
 608                            "Error parsing client section.");
 609         error:
 610                 client_free(c);
 611 #ifdef WITH_TCP
 612                 free(hs_proto);
 613                 hs_proto = NULL;
 614 #endif
 615
 616                 return NULL;
 617         }
 618
 619         /*
 620          *      Global clients can set servers to use,
 621          *      per-server clients cannot.
 622          */
 623         if (in_server && c->server) {
 624                 cf_log_err(cf_sectiontoitem(cs),
 625                            "Clients inside of an server section cannot point to a server.");
 626                 goto error;
 627         }
 628
 629         /*
 630          *      No "ipaddr" or "ipv6addr", use old-style
 631          *      "client <ipaddr> {" syntax.
 632          */
 633         if (!cf_pair_find(cs, "ipaddr") &&
 634             !cf_pair_find(cs, "ipv6addr")) {
 635                 char *prefix_ptr;
 636
 637                 prefix_ptr = strchr(name2, '/');
 638
 639                 /*
 640                  *      Look for prefixes.
 641                  */
 642                 if (prefix_ptr) {
 643                         c->prefix = atoi(prefix_ptr + 1);
 644                         if ((c->prefix < 0) || (c->prefix > 128)) {
 645                                 cf_log_err(cf_sectiontoitem(cs),
 646                                            "Invalid Prefix value '%s' for IP.",
 647                                            prefix_ptr + 1);
 648                                 goto error;
 649                         }
 650                         /* Replace '/' with '\0' */
 651                         *prefix_ptr = '\0';
 652                 }
 653
 654                 /*
 655                  *      Always get the numeric representation of IP
 656                  */
 657                 if (ip_hton(name2, AF_UNSPEC, &c->ipaddr) < 0) {
 658                         cf_log_err(cf_sectiontoitem(cs),
 659                                    "Failed to look up hostname %s: %s",
 660                                    name2, fr_strerror());
 661                         goto error;
 662                 }
 663
 664                 if (prefix_ptr) *prefix_ptr = '/';
 665                 c->longname = strdup(name2);
 666
 667                 if (!c->shortname) c->shortname = strdup(c->longname);
 668
 669         } else {
 670                 char buffer[1024];
 671
 672                 /*
 673                  *      Figure out which one to use.
 674                  */
 675                 if (cf_pair_find(cs, "ipaddr")) {
 676                         c->ipaddr.af = AF_INET;
 677                         c->ipaddr.ipaddr.ip4addr = cl_ip4addr;
 678
 679                         if ((c->prefix < -1) || (c->prefix > 32)) {
 680                                 cf_log_err(cf_sectiontoitem(cs),
 681                                            "Netmask must be between 0 and 32");
 682                                 goto error;
 683                         }
 684
 685                 } else if (cf_pair_find(cs, "ipv6addr")) {
 686                         c->ipaddr.af = AF_INET6;
 687                         c->ipaddr.ipaddr.ip6addr = cl_ip6addr;
 688
 689                         if ((c->prefix < -1) || (c->prefix > 128)) {
 690                                 cf_log_err(cf_sectiontoitem(cs),
 691                                            "Netmask must be between 0 and 128");
 692                                 goto error;
 693                         }
 694                 } else {
 695                         cf_log_err(cf_sectiontoitem(cs),
 696                                    "No IP address defined for the client");
 697                         goto error;
 698                 }
 699
 700                 ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 701                 c->longname = strdup(buffer);
 702
 703                 /*
 704                  *      Set the short name to the name2
 705                  */
 706                 if (!c->shortname) c->shortname = strdup(name2);
 707
 708                 c->proto = IPPROTO_UDP;
 709 #ifdef WITH_TCP
 710                 if (hs_proto) {
 711                         if (strcmp(hs_proto, "udp") == 0) {
 712                                 free(hs_proto);
 713                                 hs_proto = NULL;
 714
 715                         } else if (strcmp(hs_proto, "tcp") == 0) {
 716                                 free(hs_proto);
 717                                 hs_proto = NULL;
 718                                 c->proto = IPPROTO_TCP;
 719
 720                         } else if (strcmp(hs_proto, "*") == 0) {
 721                                 free(hs_proto);
 722                                 hs_proto = NULL;
 723                                 c->proto = IPPROTO_IP; /* fake for dual */
 724
 725                         } else {
 726                                 cf_log_err(cf_sectiontoitem(cs),
 727                                            "Unknown proto \"%s\".", hs_proto);
 728                                 goto error;
 729                         }
 730                 }
 731 #endif
 732         }
 733
 734         if (c->prefix < 0) switch (c->ipaddr.af) {
 735         case AF_INET:
 736                 c->prefix = 32;
 737                 break;
 738         case AF_INET6:
 739                 c->prefix = 128;
 740                 break;
 741         default:
 742                 break;
 743         }
 744
 745 #ifdef WITH_DYNAMIC_CLIENTS
 746         if (c->client_server) {
 747                 free(c->secret);
 748                 c->secret = strdup("testing123");
 749
 750                 if (((c->ipaddr.af == AF_INET) &&
 751                      (c->prefix == 32)) ||
 752                     ((c->ipaddr.af == AF_INET6) &&
 753                      (c->prefix == 128))) {
 754                         cf_log_err(cf_sectiontoitem(cs),
 755                                    "Dynamic clients MUST be a network, not a single IP address.");
 756                         goto error;
 757                 }
 758
 759                 return c;
 760         }
 761 #endif
 762
 763         if (!c->secret || !*c->secret) {
 764 #ifdef WITH_DHCP
 765                 const char *value = NULL;
 766                 CONF_PAIR *cp = cf_pair_find(cs, "dhcp");
 767
 768                 if (cp) value = cf_pair_value(cp);
 769
 770                 /*
 771                  *      Secrets aren't needed for DHCP.
 772                  */
 773                 if (value && (strcmp(value, "yes") == 0)) return c;
 774
 775 #endif
 776                 cf_log_err(cf_sectiontoitem(cs),
 777                            "secret must be at least 1 character long");
 778                 goto error;
 779         }
 780
 781 #ifdef WITH_COA
 782         /*
 783          *      Point the client to the home server pool, OR to the
 784          *      home server.  This gets around the problem of figuring
 785          *      out which port to use.
 786          */
 787         if (c->coa_name) {
 788                 c->coa_pool = home_pool_byname(c->coa_name, HOME_TYPE_COA);
 789                 if (!c->coa_pool) {
 790                         c->coa_server = home_server_byname(c->coa_name,
 791                                                            HOME_TYPE_COA);
 792                 }
 793                 if (!c->coa_pool && !c->coa_server) {
 794                         cf_log_err(cf_sectiontoitem(cs), "No such home_server or home_server_pool \"%s\"", c->coa_name);
 795                         goto error;
 796                 }
 797         }
 798 #endif
 799
 800         return c;
 801 }
 802
 803
 804 /*
 805  *      Create the linked list of clients from the new configuration
 806  *      type.  This way we don't have to change too much in the other
 807  *      source-files.
 808  */
 809 RADCLIENT_LIST *clients_parse_section(CONF_SECTION *section)
 810 {
 811         int             global = FALSE, in_server = FALSE;
 812         CONF_SECTION    *cs;
 813         RADCLIENT       *c;
 814         RADCLIENT_LIST  *clients;
 815
 816         /*
 817          *      Be forgiving.  If there's already a clients, return
 818          *      it.  Otherwise create a new one.
 819          */
 820         clients = cf_data_find(section, "clients");
 821         if (clients) return clients;
 822
 823         clients = clients_init();
 824         if (!clients) return NULL;
 825
 826         if (cf_top_section(section) == section) global = TRUE;
 827
 828         if (strcmp("server", cf_section_name1(section)) == 0) in_server = TRUE;
 829
 830         /*
 831          *      Associate the clients structure with the section, where
 832          *      it will be freed once the section is freed.
 833          */
 834         if (cf_data_add(section, "clients", clients, (void *) clients_free) < 0) {
 835                 cf_log_err(cf_sectiontoitem(section),
 836                            "Failed to associate clients with section %s",
 837                        cf_section_name1(section));
 838                 clients_free(clients);
 839                 return NULL;
 840         }
 841
 842         for (cs = cf_subsection_find_next(section, NULL, "client");
 843              cs != NULL;
 844              cs = cf_subsection_find_next(section, cs, "client")) {
 845                 c = client_parse(cs, in_server);
 846                 if (!c) {
 847                         return NULL;
 848                 }
 849
 850                 /*
 851                  *      FIXME: Add the client as data via cf_data_add,
 852                  *      for migration issues.
 853                  */
 854
 855 #ifdef WITH_DYNAMIC_CLIENTS
 856 #ifdef HAVE_DIRENT_H
 857                 if (c->client_server) {
 858                         const char *value;
 859                         CONF_PAIR *cp;
 860                         DIR             *dir;
 861                         struct dirent   *dp;
 862                         struct stat stat_buf;
 863                         char buf2[2048];
 864
 865                         /*
 866                          *      Find the directory where individual
 867                          *      client definitions are stored.
 868                          */
 869                         cp = cf_pair_find(cs, "directory");
 870                         if (!cp) goto add_client;
 871
 872                         value = cf_pair_value(cp);
 873                         if (!value) {
 874                                 cf_log_err(cf_sectiontoitem(cs),
 875                                            "The \"directory\" entry must not be empty");
 876                                 client_free(c);
 877                                 return NULL;
 878                         }
 879
 880                         DEBUG("including dynamic clients in %s", value);
 881
 882                         dir = opendir(value);
 883                         if (!dir) {
 884                                 cf_log_err(cf_sectiontoitem(cs), "Error reading directory %s: %s", value, strerror(errno));
 885                                 client_free(c);
 886                                 return NULL;
 887                         }
 888
 889                         /*
 890                          *      Read the directory, ignoring "." files.
 891                          */
 892                         while ((dp = readdir(dir)) != NULL) {
 893                                 const char *p;
 894                                 RADCLIENT *dc;
 895
 896                                 if (dp->d_name[0] == '.') continue;
 897
 898                                 /*
 899                                  *      Check for valid characters
 900                                  */
 901                                 for (p = dp->d_name; *p != '\0'; p++) {
 902                                         if (isalpha((int)*p) ||
 903                                             isdigit((int)*p) ||
 904                                             (*p == ':') ||
 905                                             (*p == '.')) continue;
 906                                                 break;
 907                                 }
 908                                 if (*p != '\0') continue;
 909
 910                                 snprintf(buf2, sizeof(buf2), "%s/%s",
 911                                          value, dp->d_name);
 912
 913                                 if ((stat(buf2, &stat_buf) != 0) ||
 914                                     S_ISDIR(stat_buf.st_mode)) continue;
 915
 916                                 dc = client_read(buf2, in_server, TRUE);
 917                                 if (!dc) {
 918                                         cf_log_err(cf_sectiontoitem(cs),
 919                                                    "Failed reading client file \"%s\"", buf2);
 920                                         client_free(c);
 921                                         return NULL;
 922                                 }
 923
 924                                 /*
 925                                  *      Validate, and add to the list.
 926                                  */
 927                                 if (!client_validate(clients, c, dc)) {
 928
 929                                         client_free(c);
 930                                         return NULL;
 931                                 }
 932                         } /* loop over the directory */
 933                 }
 934 #endif /* HAVE_DIRENT_H */
 935 #endif /* WITH_DYNAMIC_CLIENTS */
 936
 937         add_client:
 938                 if (!client_add(clients, c)) {
 939                         cf_log_err(cf_sectiontoitem(cs),
 940                                    "Failed to add client %s",
 941                                    cf_section_name2(cs));
 942                         client_free(c);
 943                         return NULL;
 944                 }
 945
 946         }
 947
 948         /*
 949          *      Replace the global list of clients with the new one.
 950          *      The old one is still referenced from the original
 951          *      configuration, and will be freed when that is freed.
 952          */
 953         if (global) {
 954                 root_clients = clients;
 955         }
 956
 957         return clients;
 958 }
 959
 960 #ifdef WITH_DYNAMIC_CLIENTS
 961 /*
 962  *      We overload this structure a lot.
 963  */
 964 static const CONF_PARSER dynamic_config[] = {
 965         { "FreeRADIUS-Client-IP-Address",  PW_TYPE_IPADDR,
 966           offsetof(RADCLIENT, ipaddr), 0, NULL },
 967         { "FreeRADIUS-Client-IPv6-Address",  PW_TYPE_IPV6ADDR,
 968           offsetof(RADCLIENT, ipaddr), 0, NULL },
 969
 970         { "FreeRADIUS-Client-Require-MA",  PW_TYPE_BOOLEAN,
 971           offsetof(RADCLIENT, message_authenticator), NULL, NULL },
 972
 973         { "FreeRADIUS-Client-Secret",  PW_TYPE_STRING_PTR,
 974           offsetof(RADCLIENT, secret), 0, "" },
 975         { "FreeRADIUS-Client-Shortname",  PW_TYPE_STRING_PTR,
 976           offsetof(RADCLIENT, shortname), 0, "" },
 977         { "FreeRADIUS-Client-NAS-Type",  PW_TYPE_STRING_PTR,
 978           offsetof(RADCLIENT, nastype), 0, NULL },
 979         { "FreeRADIUS-Client-Virtual-Server",  PW_TYPE_STRING_PTR,
 980           offsetof(RADCLIENT, server), 0, NULL },
 981
 982         { NULL, -1, 0, NULL, NULL }
 983 };
 984
 985
 986 int client_validate(RADCLIENT_LIST *clients, RADCLIENT *master, RADCLIENT *c)
 987 {
 988         char buffer[128];
 989
 990         /*
 991          *      No virtual server defined.  Inherit the parent's
 992          *      definition.
 993          */
 994         if (master->server && !c->server) {
 995                 c->server = strdup(master->server);
 996         }
 997
 998         /*
 999          *      If the client network isn't global (not tied to a
1000          *      virtual server), then ensure that this clients server
1001          *      is the same as the enclosing networks virtual server.
1002          */
1003         if (master->server &&
1004              (strcmp(master->server, c->server) != 0)) {
1005                 DEBUG("- Cannot add client %s: Virtual server %s is not the same as the virtual server for the network.",
1006                       ip_ntoh(&c->ipaddr,
1007                               buffer, sizeof(buffer)),
1008                       c->server);
1009
1010                 goto error;
1011         }
1012
1013         if (!client_add(clients, c)) {
1014                 DEBUG("- Cannot add client %s: Internal error",
1015                       ip_ntoh(&c->ipaddr,
1016                               buffer, sizeof(buffer)));
1017
1018                 goto error;
1019         }
1020
1021         /*
1022          *      Initialize the remaining fields.
1023          */
1024         c->dynamic = TRUE;
1025         c->lifetime = master->lifetime;
1026         c->created = time(NULL);
1027         c->longname = strdup(c->shortname);
1028
1029         DEBUG("- Added client %s with shared secret %s",
1030               ip_ntoh(&c->ipaddr, buffer, sizeof(buffer)),
1031               c->secret);
1032
1033         return 1;
1034
1035  error:
1036         client_free(c);
1037         return 0;
1038 }
1039
1040
1041 RADCLIENT *client_create(RADCLIENT_LIST *clients, REQUEST *request)
1042 {
1043         int i, *pi;
1044         char **p;
1045         RADCLIENT *c;
1046         char buffer[128];
1047
1048         if (!clients || !request) return NULL;
1049
1050         c = rad_malloc(sizeof(*c));
1051         memset(c, 0, sizeof(*c));
1052         c->cs = request->client->cs;
1053         c->ipaddr.af = AF_UNSPEC;
1054
1055         for (i = 0; dynamic_config[i].name != NULL; i++) {
1056                 DICT_ATTR *da;
1057                 VALUE_PAIR *vp;
1058
1059                 da = dict_attrbyname(dynamic_config[i].name);
1060                 if (!da) {
1061                         DEBUG("- Cannot add client %s: attribute \"%s\"is not in the dictionary",
1062                               ip_ntoh(&request->packet->src_ipaddr,
1063                                       buffer, sizeof(buffer)),
1064                               dynamic_config[i].name);
1065                 error:
1066                         client_free(c);
1067                         return NULL;
1068                 }
1069
1070                 vp = pairfind(request->config_items, da->attr, da->vendor);
1071                 if (!vp) {
1072                         /*
1073                          *      Not required.  Skip it.
1074                          */
1075                         if (!dynamic_config[i].dflt) continue;
1076
1077                         DEBUG("- Cannot add client %s: Required attribute \"%s\" is missing.",
1078                               ip_ntoh(&request->packet->src_ipaddr,
1079                                       buffer, sizeof(buffer)),
1080                               dynamic_config[i].name);
1081                         goto error;
1082                 }
1083
1084                 switch (dynamic_config[i].type) {
1085                 case PW_TYPE_IPADDR:
1086                         c->ipaddr.af = AF_INET;
1087                         c->ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1088                         c->prefix = 32;
1089                         break;
1090
1091                 case PW_TYPE_IPV6ADDR:
1092                         c->ipaddr.af = AF_INET6;
1093                         c->ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1094                         c->prefix = 128;
1095                         break;
1096
1097                 case PW_TYPE_STRING_PTR:
1098                         p = (char **) ((char *) c + dynamic_config[i].offset);
1099                         if (*p) free(*p);
1100                         *p = strdup(vp->vp_strvalue);
1101                         break;
1102
1103                 case PW_TYPE_BOOLEAN:
1104                         pi = (int *) ((char *) c + dynamic_config[i].offset);
1105                         *pi = vp->vp_integer;
1106                         break;
1107
1108                 default:
1109                         goto error;
1110                 }
1111         }
1112
1113         if (c->ipaddr.af == AF_UNSPEC) {
1114                 DEBUG("- Cannot add client %s: No IP address was specified.",
1115                       ip_ntoh(&request->packet->src_ipaddr,
1116                               buffer, sizeof(buffer)));
1117
1118                 goto error;
1119         }
1120
1121         if (fr_ipaddr_cmp(&request->packet->src_ipaddr, &c->ipaddr) != 0) {
1122                 char buf2[128];
1123
1124                 DEBUG("- Cannot add client %s: IP address %s do not match",
1125                       ip_ntoh(&request->packet->src_ipaddr,
1126                               buffer, sizeof(buffer)),
1127                       ip_ntoh(&c->ipaddr,
1128                               buf2, sizeof(buf2)));
1129                 goto error;
1130         }
1131
1132         if (!client_validate(clients, request->client, c)) {
1133                 return NULL;
1134         }
1135
1136         return c;
1137 }
1138
1139 /*
1140  *      Read a client definition from the given filename.
1141  */
1142 RADCLIENT *client_read(const char *filename, int in_server, int flag)
1143 {
1144         const char *p;
1145         RADCLIENT *c;
1146         CONF_SECTION *cs;
1147         char buffer[256];
1148
1149         if (!filename) return NULL;
1150
1151         cs = cf_file_read(filename);
1152         if (!cs) return NULL;
1153
1154         c = client_parse(cf_section_sub_find(cs, "client"), in_server);
1155
1156         p = strrchr(filename, FR_DIR_SEP);
1157         if (p) {
1158                 p++;
1159         } else {
1160                 p = filename;
1161         }
1162
1163         if (!flag) return c;
1164
1165         /*
1166          *      Additional validations
1167          */
1168         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
1169         if (strcmp(p, buffer) != 0) {
1170                 DEBUG("Invalid client definition in %s: IP address %s does not match name %s", filename, buffer, p);
1171                 client_free(c);
1172                 return NULL;
1173         }
1174
1175
1176
1177         return c;
1178 }
1179 #endif