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