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