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