git.meshlink.io Git - catta/blob - avahi-client/resolver.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of avahi.
   5
   6   avahi is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   avahi is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
  14   Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with avahi; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #include <dbus/dbus.h>
  31
  32 #include <avahi-client/client.h>
  33 #include <avahi-common/dbus.h>
  34 #include <avahi-common/llist.h>
  35 #include <avahi-common/error.h>
  36 #include <avahi-common/malloc.h>
  37
  38 #include "client.h"
  39 #include "internal.h"
  40
  41 static void
  42 service_pending_call_callback(DBusPendingCall *pending, void *userdata) {
  43     AvahiServiceResolver *r =  userdata;
  44     DBusMessage *message = NULL;
  45     AvahiStringList *strlst = NULL;
  46     DBusError error;
  47
  48     assert(pending);
  49     assert(r);
  50
  51     dbus_error_init(&error);
  52
  53     if (!(message = dbus_pending_call_steal_reply(pending)))
  54         goto fail;
  55
  56     if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_RETURN) {
  57         int j;
  58         int32_t interface;
  59         AvahiProtocol protocol, aprotocol;
  60         char *name, *type, *domain, *host, *address;
  61         uint16_t port;
  62         DBusMessageIter iter, sub;
  63         AvahiAddress a;
  64
  65         if (!dbus_message_get_args(
  66                 message, &error,
  67                 DBUS_TYPE_INT32, &interface,
  68                 DBUS_TYPE_INT32, &protocol,
  69                 DBUS_TYPE_STRING, &name,
  70                 DBUS_TYPE_STRING, &type,
  71                 DBUS_TYPE_STRING, &domain,
  72                 DBUS_TYPE_STRING, &host,
  73                 DBUS_TYPE_INT32, &aprotocol,
  74                 DBUS_TYPE_STRING, &address,
  75                 DBUS_TYPE_UINT16, &port,
  76                 DBUS_TYPE_INVALID) ||
  77             dbus_error_is_set (&error)) {
  78             fprintf(stderr, "Failed to parse resolver event.\n");
  79             goto fail;
  80         }
  81
  82         dbus_message_iter_init(message, &iter);
  83
  84         for (j = 0; j < 9; j++)
  85             dbus_message_iter_next(&iter);
  86
  87         if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
  88             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_ARRAY) {
  89             fprintf(stderr, "Error parsing service resolving message");
  90             goto fail;
  91         }
  92
  93         strlst = NULL;
  94         dbus_message_iter_recurse(&iter, &sub);
  95
  96         for (;;) {
  97             DBusMessageIter sub2;
  98             int at;
  99
 100             if ((at = dbus_message_iter_get_arg_type(&sub)) == DBUS_TYPE_INVALID)
 101                 break;
 102
 103             assert(at == DBUS_TYPE_ARRAY);
 104
 105             if (dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_BYTE) {
 106                 fprintf(stderr, "Error parsing service resolving message");
 107                 goto fail;
 108             }
 109
 110             dbus_message_iter_recurse(&sub, &sub2);
 111
 112             if (dbus_message_iter_get_array_len(&sub2) > 0) {
 113                 uint8_t *k;
 114                 int n;
 115
 116                 dbus_message_iter_get_fixed_array(&sub2, &k, &n);
 117                 strlst = avahi_string_list_add_arbitrary(strlst, k, n);
 118             }
 119
 120             dbus_message_iter_next(&sub);
 121         }
 122
 123         assert(address);
 124         if (!avahi_address_parse(address, (AvahiProtocol) aprotocol, &a)) {
 125             fprintf(stderr, "Failed to parse address\n");
 126             goto fail;
 127         }
 128
 129         r->callback(r, (AvahiIfIndex) interface, (AvahiProtocol) protocol, AVAHI_RESOLVER_FOUND, name, type, domain, host, &a, port, strlst, r->userdata);
 130
 131     } else {
 132
 133         assert(dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_ERROR);
 134
 135         avahi_client_set_errno(r->client, avahi_error_dbus_to_number(dbus_message_get_error_name(message)));
 136
 137         r->callback(r, (AvahiIfIndex) 0, (AvahiProtocol) 0, AVAHI_RESOLVER_TIMEOUT, NULL, NULL, NULL, NULL, NULL, 0, NULL, r->userdata);
 138     }
 139
 140 fail:
 141
 142     if (message)
 143         dbus_message_unref(message);
 144
 145     avahi_string_list_free(strlst);
 146
 147     dbus_error_free (&error);
 148 }
 149
 150 static void
 151 hostname_pending_call_callback(DBusPendingCall *pending, void *userdata) {
 152     AvahiHostNameResolver *r =  userdata;
 153     DBusMessage *message = NULL;
 154     DBusError error;
 155
 156     assert(pending);
 157     assert(r);
 158
 159     dbus_error_init(&error);
 160
 161     if (!(message = dbus_pending_call_steal_reply(pending)))
 162         goto fail;
 163
 164     if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_RETURN) {
 165         int32_t interface;
 166         AvahiProtocol protocol, aprotocol;
 167         char *name, *address;
 168         AvahiAddress a;
 169
 170         if (!dbus_message_get_args(
 171                 message, &error,
 172                 DBUS_TYPE_INT32, &interface,
 173                 DBUS_TYPE_INT32, &protocol,
 174                 DBUS_TYPE_STRING, &name,
 175                 DBUS_TYPE_INT32, &aprotocol,
 176                 DBUS_TYPE_STRING, &address,
 177                 DBUS_TYPE_INVALID) ||
 178             dbus_error_is_set (&error)) {
 179             fprintf(stderr, "Failed to parse resolver event.\n");
 180             goto fail;
 181         }
 182
 183         assert(address);
 184         if (!avahi_address_parse(address, (AvahiProtocol) aprotocol, &a)) {
 185             fprintf(stderr, "Failed to parse address\n");
 186             goto fail;
 187         }
 188
 189         r->callback(r, (AvahiIfIndex) interface, (AvahiProtocol) protocol, AVAHI_RESOLVER_FOUND, name, &a, r->userdata);
 190
 191     } else {
 192
 193         assert(dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_ERROR);
 194
 195         avahi_client_set_errno(r->client, avahi_error_dbus_to_number(dbus_message_get_error_name(message)));
 196
 197         r->callback(r, (AvahiIfIndex) 0, (AvahiProtocol) 0, AVAHI_RESOLVER_TIMEOUT, NULL, NULL, r->userdata);
 198     }
 199
 200 fail:
 201
 202     if (message)
 203         dbus_message_unref(message);
 204
 205     dbus_error_free (&error);
 206 }
 207
 208 static void
 209 address_pending_call_callback(DBusPendingCall *pending, void *userdata) {
 210     AvahiAddressResolver *r =  userdata;
 211     DBusMessage *message = NULL;
 212     DBusError error;
 213
 214     assert(pending);
 215     assert(r);
 216
 217     dbus_error_init(&error);
 218
 219     if (!(message = dbus_pending_call_steal_reply(pending)))
 220         goto fail;
 221
 222     if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_RETURN) {
 223         int32_t interface;
 224         AvahiProtocol protocol, aprotocol;
 225         char *name, *address;
 226         AvahiAddress a;
 227
 228         if (!dbus_message_get_args(
 229                 message, &error,
 230                 DBUS_TYPE_INT32, &interface,
 231                 DBUS_TYPE_INT32, &protocol,
 232                 DBUS_TYPE_INT32, &aprotocol,
 233                 DBUS_TYPE_STRING, &address,
 234                 DBUS_TYPE_STRING, &name,
 235                 DBUS_TYPE_INVALID) ||
 236             dbus_error_is_set (&error)) {
 237             fprintf(stderr, "Failed to parse resolver event.\n");
 238             goto fail;
 239         }
 240
 241         assert(address);
 242         if (!avahi_address_parse(address, (AvahiProtocol) aprotocol, &a)) {
 243             fprintf(stderr, "Failed to parse address\n");
 244             goto fail;
 245         }
 246
 247         r->callback(r, (AvahiIfIndex) interface, (AvahiProtocol) protocol, AVAHI_RESOLVER_FOUND, (AvahiProtocol) aprotocol, &a, name, r->userdata);
 248
 249     } else {
 250
 251         assert(dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_ERROR);
 252
 253         avahi_client_set_errno(r->client, avahi_error_dbus_to_number(dbus_message_get_error_name(message)));
 254
 255         r->callback(r, (AvahiIfIndex) 0, (AvahiProtocol) 0, AVAHI_RESOLVER_TIMEOUT, (AvahiProtocol) 0, NULL, NULL, r->userdata);
 256     }
 257
 258 fail:
 259
 260     if (message)
 261         dbus_message_unref(message);
 262
 263     dbus_error_free (&error);
 264 }
 265
 266 /* AvahiServiceResolver implementation */
 267 AvahiServiceResolver * avahi_service_resolver_new(
 268     AvahiClient *client,
 269     AvahiIfIndex interface,
 270     AvahiProtocol protocol,
 271     const char *name,
 272     const char *type,
 273     const char *domain,
 274     AvahiProtocol aprotocol,
 275     AvahiServiceResolverCallback callback,
 276     void *userdata) {
 277
 278     DBusError error;
 279     AvahiServiceResolver *r;
 280     DBusMessage *message;
 281     int32_t i_interface, i_protocol, i_aprotocol;
 282
 283     assert(client);
 284     assert(name);
 285     assert(type);
 286
 287     if (!domain)
 288         domain = "";
 289
 290     dbus_error_init (&error);
 291
 292     if (client->state == AVAHI_CLIENT_DISCONNECTED) {
 293         avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
 294         goto fail;
 295     }
 296
 297     if (!(r = avahi_new(AvahiServiceResolver, 1))) {
 298         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 299         goto fail;
 300     }
 301
 302     r->client = client;
 303     r->callback = callback;
 304     r->userdata = userdata;
 305     r->call = NULL;
 306
 307     AVAHI_LLIST_PREPEND(AvahiServiceResolver, service_resolvers, client->service_resolvers, r);
 308
 309     if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "ResolveService"))) {
 310         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 311         goto fail;
 312     }
 313
 314     i_interface = interface;
 315     i_protocol = protocol;
 316     i_aprotocol = aprotocol;
 317
 318     if (!(dbus_message_append_args(
 319               message,
 320               DBUS_TYPE_INT32, &i_interface,
 321               DBUS_TYPE_INT32, &i_protocol,
 322               DBUS_TYPE_STRING, &name,
 323               DBUS_TYPE_STRING, &type,
 324               DBUS_TYPE_STRING, &domain,
 325               DBUS_TYPE_INT32, &i_aprotocol,
 326               DBUS_TYPE_INVALID))) {
 327         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 328         goto fail;
 329     }
 330
 331     if (!dbus_connection_send_with_reply(client->bus, message, &r->call, -1) ||
 332         !dbus_pending_call_set_notify(r->call, service_pending_call_callback, r, NULL)) {
 333         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 334         goto fail;
 335     }
 336
 337     dbus_message_unref(message);
 338
 339     return r;
 340
 341 fail:
 342
 343     if (dbus_error_is_set(&error)) {
 344         avahi_client_set_dbus_error(client, &error);
 345         dbus_error_free(&error);
 346     }
 347
 348     if (r)
 349         avahi_service_resolver_free(r);
 350
 351     if (message)
 352         dbus_message_unref(message);
 353
 354     return NULL;
 355
 356 }
 357
 358 AvahiClient* avahi_service_resolver_get_client (AvahiServiceResolver *r) {
 359     assert (r);
 360
 361     return r->client;
 362 }
 363
 364 int avahi_service_resolver_free(AvahiServiceResolver *r) {
 365     AvahiClient *client;
 366
 367     assert(r);
 368     client = r->client;
 369
 370     if (r->call) {
 371         dbus_pending_call_cancel(r->call);
 372         dbus_pending_call_unref(r->call);
 373     }
 374
 375     AVAHI_LLIST_REMOVE(AvahiServiceResolver, service_resolvers, client->service_resolvers, r);
 376
 377     avahi_free(r);
 378
 379     return AVAHI_OK;
 380 }
 381
 382 int avahi_service_resolver_block(AvahiServiceResolver *r) {
 383     AvahiClient *client;
 384
 385     assert(r);
 386     client = r->client;
 387
 388     if (r->call)
 389         dbus_pending_call_block(r->call);
 390
 391     return AVAHI_OK;
 392 }
 393
 394 /* AvahiHostNameResolver implementation */
 395
 396 AvahiHostNameResolver * avahi_host_name_resolver_new(
 397     AvahiClient *client,
 398     AvahiIfIndex interface,
 399     AvahiProtocol protocol,
 400     const char *name,
 401     AvahiProtocol aprotocol,
 402     AvahiHostNameResolverCallback callback,
 403     void *userdata) {
 404
 405     DBusError error;
 406     AvahiHostNameResolver *r;
 407     DBusMessage *message;
 408     int32_t i_interface, i_protocol, i_aprotocol;
 409
 410     assert(client);
 411     assert(name);
 412
 413     dbus_error_init (&error);
 414
 415     if (client->state == AVAHI_CLIENT_DISCONNECTED) {
 416         avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
 417         goto fail;
 418     }
 419
 420     if (!(r = avahi_new(AvahiHostNameResolver, 1))) {
 421         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 422         goto fail;
 423     }
 424
 425     r->client = client;
 426     r->callback = callback;
 427     r->userdata = userdata;
 428     r->call = NULL;
 429
 430     AVAHI_LLIST_PREPEND(AvahiHostNameResolver, host_name_resolvers, client->host_name_resolvers, r);
 431
 432     if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "ResolveHostName"))) {
 433         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 434         goto fail;
 435     }
 436
 437     i_interface = interface;
 438     i_protocol = protocol;
 439     i_aprotocol = aprotocol;
 440
 441     if (!(dbus_message_append_args(
 442               message,
 443               DBUS_TYPE_INT32, &i_interface,
 444               DBUS_TYPE_INT32, &i_protocol,
 445               DBUS_TYPE_STRING, &name,
 446               DBUS_TYPE_INT32, &i_aprotocol,
 447               DBUS_TYPE_INVALID))) {
 448         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 449         goto fail;
 450     }
 451
 452     if (!dbus_connection_send_with_reply(client->bus, message, &r->call, -1) ||
 453         !dbus_pending_call_set_notify(r->call, hostname_pending_call_callback, r, NULL)) {
 454         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 455         goto fail;
 456     }
 457
 458     dbus_message_unref(message);
 459
 460     return r;
 461
 462 fail:
 463
 464     if (dbus_error_is_set(&error)) {
 465         avahi_client_set_dbus_error(client, &error);
 466         dbus_error_free(&error);
 467     }
 468
 469     if (r)
 470         avahi_host_name_resolver_free(r);
 471
 472     if (message)
 473         dbus_message_unref(message);
 474
 475     return NULL;
 476
 477 }
 478
 479 int avahi_host_name_resolver_free(AvahiHostNameResolver *r) {
 480     AvahiClient *client;
 481
 482     assert(r);
 483     client = r->client;
 484
 485     if (r->call) {
 486         dbus_pending_call_cancel(r->call);
 487         dbus_pending_call_unref(r->call);
 488     }
 489
 490     AVAHI_LLIST_REMOVE(AvahiHostNameResolver, host_name_resolvers, client->host_name_resolvers, r);
 491
 492     avahi_free(r);
 493
 494     return AVAHI_OK;
 495 }
 496
 497 AvahiClient* avahi_host_name_resolver_get_client (AvahiHostNameResolver *r) {
 498     assert (r);
 499
 500     return r->client;
 501 }
 502
 503 int avahi_host_name_resolver_block(AvahiHostNameResolver *r) {
 504     AvahiClient *client;
 505
 506     assert(r);
 507     client = r->client;
 508
 509     if (r->call)
 510         dbus_pending_call_block(r->call);
 511
 512     return AVAHI_OK;
 513 }
 514
 515 /* AvahiAddressResolver implementation */
 516
 517 AvahiAddressResolver * avahi_address_resolver_new_a(
 518     AvahiClient *client,
 519     AvahiIfIndex interface,
 520     const AvahiAddress *a,
 521     AvahiAddressResolverCallback callback,
 522     void *userdata) {
 523
 524     char addr[64];
 525
 526     assert (a);
 527
 528     avahi_address_snprint (addr, sizeof (addr), a);
 529
 530     return avahi_address_resolver_new (client, interface,
 531             a->family, addr,
 532             callback, userdata);
 533 }
 534
 535 AvahiAddressResolver * avahi_address_resolver_new(
 536     AvahiClient *client,
 537     AvahiIfIndex interface,
 538     AvahiProtocol protocol,
 539     const char *address,
 540     AvahiAddressResolverCallback callback,
 541     void *userdata) {
 542
 543     DBusError error;
 544     AvahiAddressResolver *r;
 545     DBusMessage *message;
 546     int32_t i_interface;
 547     AvahiProtocol i_protocol;
 548
 549     assert(client);
 550
 551     dbus_error_init (&error);
 552
 553     if (client->state == AVAHI_CLIENT_DISCONNECTED) {
 554         avahi_client_set_errno(client, AVAHI_ERR_BAD_STATE);
 555         goto fail;
 556     }
 557
 558     if (!(r = avahi_new(AvahiAddressResolver, 1))) {
 559         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 560         goto fail;
 561     }
 562
 563     r->client = client;
 564     r->callback = callback;
 565     r->userdata = userdata;
 566     r->call = NULL;
 567
 568     AVAHI_LLIST_PREPEND(AvahiAddressResolver, address_resolvers, client->address_resolvers, r);
 569
 570     if (!(message = dbus_message_new_method_call(AVAHI_DBUS_NAME, AVAHI_DBUS_PATH_SERVER, AVAHI_DBUS_INTERFACE_SERVER, "ResolveAddress"))) {
 571         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 572         goto fail;
 573     }
 574
 575     i_interface = interface;
 576     i_protocol = protocol;
 577
 578     if (!(dbus_message_append_args(
 579               message,
 580               DBUS_TYPE_INT32, &i_interface,
 581               DBUS_TYPE_INT32, &i_protocol,
 582               DBUS_TYPE_STRING, &address,
 583               DBUS_TYPE_INVALID))) {
 584         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 585         goto fail;
 586     }
 587
 588     if (!dbus_connection_send_with_reply(client->bus, message, &r->call, -1) ||
 589         !dbus_pending_call_set_notify(r->call, address_pending_call_callback, r, NULL)) {
 590         avahi_client_set_errno(client, AVAHI_ERR_NO_MEMORY);
 591         goto fail;
 592     }
 593
 594     dbus_message_unref(message);
 595
 596     return r;
 597
 598 fail:
 599
 600     if (dbus_error_is_set(&error)) {
 601         avahi_client_set_dbus_error(client, &error);
 602         dbus_error_free(&error);
 603     }
 604
 605     if (r)
 606         avahi_address_resolver_free(r);
 607
 608     if (message)
 609         dbus_message_unref(message);
 610
 611     return NULL;
 612
 613 }
 614
 615 AvahiClient* avahi_address_resolver_get_client (AvahiAddressResolver *r) {
 616     assert (r);
 617
 618     return r->client;
 619 }
 620
 621 int avahi_address_resolver_free(AvahiAddressResolver *r) {
 622     AvahiClient *client;
 623
 624     assert(r);
 625     client = r->client;
 626
 627     if (r->call) {
 628         dbus_pending_call_cancel(r->call);
 629         dbus_pending_call_unref(r->call);
 630     }
 631
 632     AVAHI_LLIST_REMOVE(AvahiAddressResolver, address_resolvers, client->address_resolvers, r);
 633
 634     avahi_free(r);
 635
 636     return AVAHI_OK;
 637 }
 638
 639 int avahi_address_resolver_block(AvahiAddressResolver *r) {
 640     AvahiClient *client;
 641
 642     assert(r);
 643     client = r->client;
 644
 645     if (r->call)
 646         dbus_pending_call_block(r->call);
 647
 648     return AVAHI_OK;
 649 }