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