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 (!client) return;
 422
 423         if (!clients) clients = root_clients;
 424
 425         if (!client->dynamic) return;
 426
 427         rad_assert((client->prefix >= 0) && (client->prefix <= 128));
 428
 429         client->dynamic = 2;    /* signal to client_free */
 430
 431         rbtree_deletebydata(tree_num, client);
 432         rbtree_deletebydata(clients->trees[client->prefix], client);
 433 }
 434 #endif
 435
 436
 437 /*
 438  *      Find a client in the RADCLIENTS list by number.
 439  *      This is a support function for the statistics code.
 440  */
 441 RADCLIENT *client_findbynumber(const RADCLIENT_LIST *clients,
 442                                int number)
 443 {
 444 #ifdef WITH_STATS
 445         if (!clients) clients = root_clients;
 446
 447         if (!clients) return NULL;
 448
 449         if (number >= tree_num_max) return NULL;
 450
 451         if (tree_num) {
 452                 RADCLIENT myclient;
 453
 454                 myclient.number = number;
 455
 456                 return rbtree_finddata(tree_num, &myclient);
 457         }
 458 #else
 459         clients = clients;      /* -Wunused */
 460         number = number;        /* -Wunused */
 461 #endif
 462         return NULL;
 463 }
 464
 465
 466 /*
 467  *      Find a client in the RADCLIENTS list.
 468  */
 469 RADCLIENT *client_find(const RADCLIENT_LIST *clients,
 470                        const fr_ipaddr_t *ipaddr, int proto)
 471 {
 472         int i, max_prefix;
 473         RADCLIENT myclient;
 474
 475         if (!clients) clients = root_clients;
 476
 477         if (!clients || !ipaddr) return NULL;
 478
 479         switch (ipaddr->af) {
 480         case AF_INET:
 481                 max_prefix = 32;
 482                 break;
 483
 484         case AF_INET6:
 485                 max_prefix = 128;
 486                 break;
 487
 488         default :
 489                 return NULL;
 490         }
 491
 492         for (i = max_prefix; i >= clients->min_prefix; i--) {
 493                 void *data;
 494
 495                 myclient.prefix = i;
 496                 myclient.ipaddr = *ipaddr;
 497                 myclient.proto = proto;
 498                 client_sane(&myclient); /* clean up the ipaddress */
 499
 500                 if (!clients->trees[i]) continue;
 501
 502                 data = rbtree_finddata(clients->trees[i], &myclient);
 503                 if (data) {
 504                         return data;
 505                 }
 506         }
 507
 508         return NULL;
 509 }
 510
 511
 512 /*
 513  *      Old wrapper for client_find
 514  */
 515 RADCLIENT *client_find_old(const fr_ipaddr_t *ipaddr)
 516 {
 517         return client_find(root_clients, ipaddr, IPPROTO_UDP);
 518 }
 519
 520 static struct in_addr cl_ip4addr;
 521 static struct in6_addr cl_ip6addr;
 522 #ifdef WITH_TCP
 523 static char *hs_proto = NULL;
 524 #endif
 525
 526 static const CONF_PARSER client_config[] = {
 527         { "ipaddr",  PW_TYPE_IPADDR,
 528           0, &cl_ip4addr,  NULL },
 529         { "ipv6addr",  PW_TYPE_IPV6ADDR,
 530           0, &cl_ip6addr, NULL },
 531         { "netmask",  PW_TYPE_INTEGER,
 532           offsetof(RADCLIENT, prefix), 0, NULL },
 533
 534         { "require_message_authenticator",  PW_TYPE_BOOLEAN,
 535           offsetof(RADCLIENT, message_authenticator), 0, "no" },
 536
 537         { "secret",  PW_TYPE_STRING_PTR,
 538           offsetof(RADCLIENT, secret), 0, NULL },
 539         { "shortname",  PW_TYPE_STRING_PTR,
 540           offsetof(RADCLIENT, shortname), 0, NULL },
 541         { "nastype",  PW_TYPE_STRING_PTR,
 542           offsetof(RADCLIENT, nastype), 0, NULL },
 543         { "login",  PW_TYPE_STRING_PTR,
 544           offsetof(RADCLIENT, login), 0, NULL },
 545         { "password",  PW_TYPE_STRING_PTR,
 546           offsetof(RADCLIENT, password), 0, NULL },
 547         { "virtual_server",  PW_TYPE_STRING_PTR,
 548           offsetof(RADCLIENT, server), 0, NULL },
 549         { "server",  PW_TYPE_STRING_PTR, /* compatability with 2.0-pre */
 550           offsetof(RADCLIENT, server), 0, NULL },
 551
 552 #ifdef WITH_TCP
 553         { "proto",  PW_TYPE_STRING_PTR,
 554           0, &hs_proto, NULL },
 555         { "max_connections",  PW_TYPE_INTEGER,
 556           offsetof(RADCLIENT, max_connections), 0, "16" },
 557 #endif
 558
 559 #ifdef WITH_DYNAMIC_CLIENTS
 560         { "dynamic_clients",  PW_TYPE_STRING_PTR,
 561           offsetof(RADCLIENT, client_server), 0, NULL },
 562         { "lifetime",  PW_TYPE_INTEGER,
 563           offsetof(RADCLIENT, lifetime), 0, NULL },
 564         { "rate_limit",  PW_TYPE_BOOLEAN,
 565           offsetof(RADCLIENT, rate_limit), 0, NULL },
 566 #endif
 567
 568 #ifdef WITH_COA
 569         { "coa_server",  PW_TYPE_STRING_PTR,
 570           offsetof(RADCLIENT, coa_name), 0, NULL },
 571 #endif
 572
 573         { NULL, -1, 0, NULL, NULL }
 574 };
 575
 576
 577 static RADCLIENT *client_parse(CONF_SECTION *cs, int in_server)
 578 {
 579         RADCLIENT       *c;
 580         const char      *name2;
 581
 582         name2 = cf_section_name2(cs);
 583         if (!name2) {
 584                 cf_log_err(cf_sectiontoitem(cs),
 585                            "Missing client name");
 586                 return NULL;
 587         }
 588
 589         /*
 590          * The size is fine.. Let's create the buffer
 591          */
 592         c = rad_malloc(sizeof(*c));
 593         memset(c, 0, sizeof(*c));
 594         c->cs = cs;
 595
 596 #ifdef WITH_STATS
 597         c->auth = rad_malloc(sizeof(*c->auth));
 598         memset(c->auth, 0, sizeof(*c->auth));
 599
 600 #ifdef WITH_ACCOUNTING
 601         c->acct = rad_malloc(sizeof(*c->acct));
 602         memset(c->acct, 0, sizeof(*c->acct));
 603 #endif
 604 #endif
 605
 606         memset(&cl_ip4addr, 0, sizeof(cl_ip4addr));
 607         memset(&cl_ip6addr, 0, sizeof(cl_ip6addr));
 608         c->prefix = -1;
 609
 610         if (cf_section_parse(cs, c, client_config) < 0) {
 611                 cf_log_err(cf_sectiontoitem(cs),
 612                            "Error parsing client section.");
 613         error:
 614                 client_free(c);
 615 #ifdef WITH_TCP
 616                 free(hs_proto);
 617                 hs_proto = NULL;
 618 #endif
 619
 620                 return NULL;
 621         }
 622
 623         /*
 624          *      Global clients can set servers to use,
 625          *      per-server clients cannot.
 626          */
 627         if (in_server && c->server) {
 628                 cf_log_err(cf_sectiontoitem(cs),
 629                            "Clients inside of an server section cannot point to a server.");
 630                 goto error;
 631         }
 632
 633         /*
 634          *      No "ipaddr" or "ipv6addr", use old-style
 635          *      "client <ipaddr> {" syntax.
 636          */
 637         if (!cf_pair_find(cs, "ipaddr") &&
 638             !cf_pair_find(cs, "ipv6addr")) {
 639                 char *prefix_ptr;
 640
 641                 prefix_ptr = strchr(name2, '/');
 642
 643                 /*
 644                  *      Look for prefixes.
 645                  */
 646                 if (prefix_ptr) {
 647                         c->prefix = atoi(prefix_ptr + 1);
 648                         if ((c->prefix < 0) || (c->prefix > 128)) {
 649                                 cf_log_err(cf_sectiontoitem(cs),
 650                                            "Invalid Prefix value '%s' for IP.",
 651                                            prefix_ptr + 1);
 652                                 goto error;
 653                         }
 654                         /* Replace '/' with '\0' */
 655                         *prefix_ptr = '\0';
 656                 }
 657
 658                 /*
 659                  *      Always get the numeric representation of IP
 660                  */
 661                 if (ip_hton(name2, AF_UNSPEC, &c->ipaddr) < 0) {
 662                         cf_log_err(cf_sectiontoitem(cs),
 663                                    "Failed to look up hostname %s: %s",
 664                                    name2, fr_strerror());
 665                         goto error;
 666                 }
 667
 668                 if (prefix_ptr) *prefix_ptr = '/';
 669                 c->longname = strdup(name2);
 670
 671                 if (!c->shortname) c->shortname = strdup(c->longname);
 672
 673         } else {
 674                 char buffer[1024];
 675
 676                 /*
 677                  *      Figure out which one to use.
 678                  */
 679                 if (cf_pair_find(cs, "ipaddr")) {
 680                         c->ipaddr.af = AF_INET;
 681                         c->ipaddr.ipaddr.ip4addr = cl_ip4addr;
 682
 683                         if ((c->prefix < -1) || (c->prefix > 32)) {
 684                                 cf_log_err(cf_sectiontoitem(cs),
 685                                            "Netmask must be between 0 and 32");
 686                                 goto error;
 687                         }
 688
 689                 } else if (cf_pair_find(cs, "ipv6addr")) {
 690                         c->ipaddr.af = AF_INET6;
 691                         c->ipaddr.ipaddr.ip6addr = cl_ip6addr;
 692
 693                         if ((c->prefix < -1) || (c->prefix > 128)) {
 694                                 cf_log_err(cf_sectiontoitem(cs),
 695                                            "Netmask must be between 0 and 128");
 696                                 goto error;
 697                         }
 698                 } else {
 699                         cf_log_err(cf_sectiontoitem(cs),
 700                                    "No IP address defined for the client");
 701                         goto error;
 702                 }
 703
 704                 ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
 705                 c->longname = strdup(buffer);
 706
 707                 /*
 708                  *      Set the short name to the name2
 709                  */
 710                 if (!c->shortname) c->shortname = strdup(name2);
 711
 712                 c->proto = IPPROTO_UDP;
 713 #ifdef WITH_TCP
 714                 if (hs_proto) {
 715                         if (strcmp(hs_proto, "udp") == 0) {
 716                                 free(hs_proto);
 717                                 hs_proto = NULL;
 718
 719                         } else if (strcmp(hs_proto, "tcp") == 0) {
 720                                 free(hs_proto);
 721                                 hs_proto = NULL;
 722                                 c->proto = IPPROTO_TCP;
 723
 724                         } else if (strcmp(hs_proto, "*") == 0) {
 725                                 free(hs_proto);
 726                                 hs_proto = NULL;
 727                                 c->proto = IPPROTO_IP; /* fake for dual */
 728
 729                         } else {
 730                                 cf_log_err(cf_sectiontoitem(cs),
 731                                            "Unknown proto \"%s\".", hs_proto);
 732                                 goto error;
 733                         }
 734                 }
 735 #endif
 736         }
 737
 738         if (c->prefix < 0) switch (c->ipaddr.af) {
 739         case AF_INET:
 740                 c->prefix = 32;
 741                 break;
 742         case AF_INET6:
 743                 c->prefix = 128;
 744                 break;
 745         default:
 746                 break;
 747         }
 748
 749 #ifdef WITH_DYNAMIC_CLIENTS
 750         if (c->client_server) {
 751                 free(c->secret);
 752                 c->secret = strdup("testing123");
 753
 754                 if (((c->ipaddr.af == AF_INET) &&
 755                      (c->prefix == 32)) ||
 756                     ((c->ipaddr.af == AF_INET6) &&
 757                      (c->prefix == 128))) {
 758                         cf_log_err(cf_sectiontoitem(cs),
 759                                    "Dynamic clients MUST be a network, not a single IP address.");
 760                         goto error;
 761                 }
 762
 763                 return c;
 764         }
 765 #endif
 766
 767         if (!c->secret || !*c->secret) {
 768 #ifdef WITH_DHCP
 769                 const char *value = NULL;
 770                 CONF_PAIR *cp = cf_pair_find(cs, "dhcp");
 771
 772                 if (cp) value = cf_pair_value(cp);
 773
 774                 /*
 775                  *      Secrets aren't needed for DHCP.
 776                  */
 777                 if (value && (strcmp(value, "yes") == 0)) return c;
 778
 779 #endif
 780                 cf_log_err(cf_sectiontoitem(cs),
 781                            "secret must be at least 1 character long");
 782                 goto error;
 783         }
 784
 785 #ifdef WITH_COA
 786         /*
 787          *      Point the client to the home server pool, OR to the
 788          *      home server.  This gets around the problem of figuring
 789          *      out which port to use.
 790          */
 791         if (c->coa_name) {
 792                 c->coa_pool = home_pool_byname(c->coa_name, HOME_TYPE_COA);
 793                 if (!c->coa_pool) {
 794                         c->coa_server = home_server_byname(c->coa_name,
 795                                                            HOME_TYPE_COA);
 796                 }
 797                 if (!c->coa_pool && !c->coa_server) {
 798                         cf_log_err(cf_sectiontoitem(cs), "No such home_server or home_server_pool \"%s\"", c->coa_name);
 799                         goto error;
 800                 }
 801         }
 802 #endif
 803
 804         return c;
 805 }
 806
 807
 808 /*
 809  *      Create the linked list of clients from the new configuration
 810  *      type.  This way we don't have to change too much in the other
 811  *      source-files.
 812  */
 813 RADCLIENT_LIST *clients_parse_section(CONF_SECTION *section)
 814 {
 815         int             global = FALSE, in_server = FALSE;
 816         CONF_SECTION    *cs;
 817         RADCLIENT       *c;
 818         RADCLIENT_LIST  *clients;
 819
 820         /*
 821          *      Be forgiving.  If there's already a clients, return
 822          *      it.  Otherwise create a new one.
 823          */
 824         clients = cf_data_find(section, "clients");
 825         if (clients) return clients;
 826
 827         clients = clients_init();
 828         if (!clients) return NULL;
 829
 830         if (cf_top_section(section) == section) global = TRUE;
 831
 832         if (strcmp("server", cf_section_name1(section)) == 0) in_server = TRUE;
 833
 834         /*
 835          *      Associate the clients structure with the section, where
 836          *      it will be freed once the section is freed.
 837          */
 838         if (cf_data_add(section, "clients", clients, (void *) clients_free) < 0) {
 839                 cf_log_err(cf_sectiontoitem(section),
 840                            "Failed to associate clients with section %s",
 841                        cf_section_name1(section));
 842                 clients_free(clients);
 843                 return NULL;
 844         }
 845
 846         for (cs = cf_subsection_find_next(section, NULL, "client");
 847              cs != NULL;
 848              cs = cf_subsection_find_next(section, cs, "client")) {
 849                 c = client_parse(cs, in_server);
 850                 if (!c) {
 851                         return NULL;
 852                 }
 853
 854                 /*
 855                  *      FIXME: Add the client as data via cf_data_add,
 856                  *      for migration issues.
 857                  */
 858
 859 #ifdef WITH_DYNAMIC_CLIENTS
 860 #ifdef HAVE_DIRENT_H
 861                 if (c->client_server) {
 862                         const char *value;
 863                         CONF_PAIR *cp;
 864                         DIR             *dir;
 865                         struct dirent   *dp;
 866                         struct stat stat_buf;
 867                         char buf2[2048];
 868
 869                         /*
 870                          *      Find the directory where individual
 871                          *      client definitions are stored.
 872                          */
 873                         cp = cf_pair_find(cs, "directory");
 874                         if (!cp) goto add_client;
 875
 876                         value = cf_pair_value(cp);
 877                         if (!value) {
 878                                 cf_log_err(cf_sectiontoitem(cs),
 879                                            "The \"directory\" entry must not be empty");
 880                                 client_free(c);
 881                                 return NULL;
 882                         }
 883
 884                         DEBUG("including dynamic clients in %s", value);
 885
 886                         dir = opendir(value);
 887                         if (!dir) {
 888                                 cf_log_err(cf_sectiontoitem(cs), "Error reading directory %s: %s", value, strerror(errno));
 889                                 client_free(c);
 890                                 return NULL;
 891                         }
 892
 893                         /*
 894                          *      Read the directory, ignoring "." files.
 895                          */
 896                         while ((dp = readdir(dir)) != NULL) {
 897                                 const char *p;
 898                                 RADCLIENT *dc;
 899
 900                                 if (dp->d_name[0] == '.') continue;
 901
 902                                 /*
 903                                  *      Check for valid characters
 904                                  */
 905                                 for (p = dp->d_name; *p != '\0'; p++) {
 906                                         if (isalpha((int)*p) ||
 907                                             isdigit((int)*p) ||
 908                                             (*p == ':') ||
 909                                             (*p == '.')) continue;
 910                                                 break;
 911                                 }
 912                                 if (*p != '\0') continue;
 913
 914                                 snprintf(buf2, sizeof(buf2), "%s/%s",
 915                                          value, dp->d_name);
 916
 917                                 if ((stat(buf2, &stat_buf) != 0) ||
 918                                     S_ISDIR(stat_buf.st_mode)) continue;
 919
 920                                 dc = client_read(buf2, in_server, TRUE);
 921                                 if (!dc) {
 922                                         cf_log_err(cf_sectiontoitem(cs),
 923                                                    "Failed reading client file \"%s\"", buf2);
 924                                         client_free(c);
 925                                         return NULL;
 926                                 }
 927
 928                                 /*
 929                                  *      Validate, and add to the list.
 930                                  */
 931                                 if (!client_validate(clients, c, dc)) {
 932
 933                                         client_free(c);
 934                                         return NULL;
 935                                 }
 936                         } /* loop over the directory */
 937                 }
 938 #endif /* HAVE_DIRENT_H */
 939 #endif /* WITH_DYNAMIC_CLIENTS */
 940
 941         add_client:
 942                 if (!client_add(clients, c)) {
 943                         cf_log_err(cf_sectiontoitem(cs),
 944                                    "Failed to add client %s",
 945                                    cf_section_name2(cs));
 946                         client_free(c);
 947                         return NULL;
 948                 }
 949
 950         }
 951
 952         /*
 953          *      Replace the global list of clients with the new one.
 954          *      The old one is still referenced from the original
 955          *      configuration, and will be freed when that is freed.
 956          */
 957         if (global) {
 958                 root_clients = clients;
 959         }
 960
 961         return clients;
 962 }
 963
 964 #ifdef WITH_DYNAMIC_CLIENTS
 965 /*
 966  *      We overload this structure a lot.
 967  */
 968 static const CONF_PARSER dynamic_config[] = {
 969         { "FreeRADIUS-Client-IP-Address",  PW_TYPE_IPADDR,
 970           offsetof(RADCLIENT, ipaddr), 0, NULL },
 971         { "FreeRADIUS-Client-IPv6-Address",  PW_TYPE_IPV6ADDR,
 972           offsetof(RADCLIENT, ipaddr), 0, NULL },
 973
 974         { "FreeRADIUS-Client-Require-MA",  PW_TYPE_BOOLEAN,
 975           offsetof(RADCLIENT, message_authenticator), NULL, NULL },
 976
 977         { "FreeRADIUS-Client-Secret",  PW_TYPE_STRING_PTR,
 978           offsetof(RADCLIENT, secret), 0, "" },
 979         { "FreeRADIUS-Client-Shortname",  PW_TYPE_STRING_PTR,
 980           offsetof(RADCLIENT, shortname), 0, "" },
 981         { "FreeRADIUS-Client-NAS-Type",  PW_TYPE_STRING_PTR,
 982           offsetof(RADCLIENT, nastype), 0, NULL },
 983         { "FreeRADIUS-Client-Virtual-Server",  PW_TYPE_STRING_PTR,
 984           offsetof(RADCLIENT, server), 0, NULL },
 985
 986         { NULL, -1, 0, NULL, NULL }
 987 };
 988
 989
 990 int client_validate(RADCLIENT_LIST *clients, RADCLIENT *master, RADCLIENT *c)
 991 {
 992         char buffer[128];
 993
 994         /*
 995          *      No virtual server defined.  Inherit the parent's
 996          *      definition.
 997          */
 998         if (master->server && !c->server) {
 999                 c->server = strdup(master->server);
1000         }
1001
1002         /*
1003          *      If the client network isn't global (not tied to a
1004          *      virtual server), then ensure that this clients server
1005          *      is the same as the enclosing networks virtual server.
1006          */
1007         if (master->server &&
1008              (strcmp(master->server, c->server) != 0)) {
1009                 DEBUG("- Cannot add client %s: Virtual server %s is not the same as the virtual server for the network.",
1010                       ip_ntoh(&c->ipaddr,
1011                               buffer, sizeof(buffer)),
1012                       c->server);
1013
1014                 goto error;
1015         }
1016
1017         if (!client_add(clients, c)) {
1018                 DEBUG("- Cannot add client %s: Internal error",
1019                       ip_ntoh(&c->ipaddr,
1020                               buffer, sizeof(buffer)));
1021
1022                 goto error;
1023         }
1024
1025         /*
1026          *      Initialize the remaining fields.
1027          */
1028         c->dynamic = TRUE;
1029         c->lifetime = master->lifetime;
1030         c->created = time(NULL);
1031         c->longname = strdup(c->shortname);
1032
1033         DEBUG("- Added client %s with shared secret %s",
1034               ip_ntoh(&c->ipaddr, buffer, sizeof(buffer)),
1035               c->secret);
1036
1037         return 1;
1038
1039  error:
1040         client_free(c);
1041         return 0;
1042 }
1043
1044
1045 RADCLIENT *client_create(RADCLIENT_LIST *clients, REQUEST *request)
1046 {
1047         int i, *pi;
1048         char **p;
1049         RADCLIENT *c;
1050         char buffer[128];
1051
1052         if (!clients || !request) return NULL;
1053
1054         c = rad_malloc(sizeof(*c));
1055         memset(c, 0, sizeof(*c));
1056         c->cs = request->client->cs;
1057         c->ipaddr.af = AF_UNSPEC;
1058
1059         for (i = 0; dynamic_config[i].name != NULL; i++) {
1060                 DICT_ATTR *da;
1061                 VALUE_PAIR *vp;
1062
1063                 da = dict_attrbyname(dynamic_config[i].name);
1064                 if (!da) {
1065                         DEBUG("- Cannot add client %s: attribute \"%s\"is not in the dictionary",
1066                               ip_ntoh(&request->packet->src_ipaddr,
1067                                       buffer, sizeof(buffer)),
1068                               dynamic_config[i].name);
1069                 error:
1070                         client_free(c);
1071                         return NULL;
1072                 }
1073
1074                 vp = pairfind(request->config_items, da->attr, da->vendor);
1075                 if (!vp) {
1076                         /*
1077                          *      Not required.  Skip it.
1078                          */
1079                         if (!dynamic_config[i].dflt) continue;
1080
1081                         DEBUG("- Cannot add client %s: Required attribute \"%s\" is missing.",
1082                               ip_ntoh(&request->packet->src_ipaddr,
1083                                       buffer, sizeof(buffer)),
1084                               dynamic_config[i].name);
1085                         goto error;
1086                 }
1087
1088                 switch (dynamic_config[i].type) {
1089                 case PW_TYPE_IPADDR:
1090                         c->ipaddr.af = AF_INET;
1091                         c->ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1092                         c->prefix = 32;
1093                         break;
1094
1095                 case PW_TYPE_IPV6ADDR:
1096                         c->ipaddr.af = AF_INET6;
1097                         c->ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1098                         c->prefix = 128;
1099                         break;
1100
1101                 case PW_TYPE_STRING_PTR:
1102                         p = (char **) ((char *) c + dynamic_config[i].offset);
1103                         if (*p) free(*p);
1104                         *p = strdup(vp->vp_strvalue);
1105                         break;
1106
1107                 case PW_TYPE_BOOLEAN:
1108                         pi = (int *) ((char *) c + dynamic_config[i].offset);
1109                         *pi = vp->vp_integer;
1110                         break;
1111
1112                 default:
1113                         goto error;
1114                 }
1115         }
1116
1117         if (c->ipaddr.af == AF_UNSPEC) {
1118                 DEBUG("- Cannot add client %s: No IP address was specified.",
1119                       ip_ntoh(&request->packet->src_ipaddr,
1120                               buffer, sizeof(buffer)));
1121
1122                 goto error;
1123         }
1124
1125         if (fr_ipaddr_cmp(&request->packet->src_ipaddr, &c->ipaddr) != 0) {
1126                 char buf2[128];
1127
1128                 DEBUG("- Cannot add client %s: IP address %s do not match",
1129                       ip_ntoh(&request->packet->src_ipaddr,
1130                               buffer, sizeof(buffer)),
1131                       ip_ntoh(&c->ipaddr,
1132                               buf2, sizeof(buf2)));
1133                 goto error;
1134         }
1135
1136         if (!client_validate(clients, request->client, c)) {
1137                 return NULL;
1138         }
1139
1140         return c;
1141 }
1142
1143 /*
1144  *      Read a client definition from the given filename.
1145  */
1146 RADCLIENT *client_read(const char *filename, int in_server, int flag)
1147 {
1148         const char *p;
1149         RADCLIENT *c;
1150         CONF_SECTION *cs;
1151         char buffer[256];
1152
1153         if (!filename) return NULL;
1154
1155         cs = cf_file_read(filename);
1156         if (!cs) return NULL;
1157
1158         c = client_parse(cf_section_sub_find(cs, "client"), in_server);
1159
1160         p = strrchr(filename, FR_DIR_SEP);
1161         if (p) {
1162                 p++;
1163         } else {
1164                 p = filename;
1165         }
1166
1167         if (!flag) return c;
1168
1169         /*
1170          *      Additional validations
1171          */
1172         ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
1173         if (strcmp(p, buffer) != 0) {
1174                 DEBUG("Invalid client definition in %s: IP address %s does not match name %s", filename, buffer, p);
1175                 client_free(c);
1176                 return NULL;
1177         }
1178
1179
1180
1181         return c;
1182 }
1183 #endif