src/modules/module-zeroconf-publish.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it 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   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with PulseAudio; 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 <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29
  30 #include <avahi-client/client.h>
  31 #include <avahi-client/publish.h>
  32 #include <avahi-common/alternative.h>
  33 #include <avahi-common/error.h>
  34 #include <avahi-common/domain.h>
  35
  36 #include <pulse/xmalloc.h>
  37 #include <pulse/util.h>
  38
  39 #include <pulsecore/parseaddr.h>
  40 #include <pulsecore/sink.h>
  41 #include <pulsecore/source.h>
  42 #include <pulsecore/native-common.h>
  43 #include <pulsecore/core-util.h>
  44 #include <pulsecore/log.h>
  45 #include <pulsecore/dynarray.h>
  46 #include <pulsecore/modargs.h>
  47 #include <pulsecore/avahi-wrap.h>
  48 #include <pulsecore/protocol-native.h>
  49
  50 #include "module-zeroconf-publish-symdef.h"
  51
  52 PA_MODULE_AUTHOR("Lennart Poettering");
  53 PA_MODULE_DESCRIPTION("mDNS/DNS-SD Service Publisher");
  54 PA_MODULE_VERSION(PACKAGE_VERSION);
  55 PA_MODULE_LOAD_ONCE(TRUE);
  56
  57 #define SERVICE_TYPE_SINK "_pulse-sink._tcp"
  58 #define SERVICE_TYPE_SOURCE "_pulse-source._tcp"
  59 #define SERVICE_TYPE_SERVER "_pulse-server._tcp"
  60 #define SERVICE_SUBTYPE_SINK_HARDWARE "_hardware._sub."SERVICE_TYPE_SINK
  61 #define SERVICE_SUBTYPE_SINK_VIRTUAL "_virtual._sub."SERVICE_TYPE_SINK
  62 #define SERVICE_SUBTYPE_SOURCE_HARDWARE "_hardware._sub."SERVICE_TYPE_SOURCE
  63 #define SERVICE_SUBTYPE_SOURCE_VIRTUAL "_virtual._sub."SERVICE_TYPE_SOURCE
  64 #define SERVICE_SUBTYPE_SOURCE_MONITOR "_monitor._sub."SERVICE_TYPE_SOURCE
  65 #define SERVICE_SUBTYPE_SOURCE_NON_MONITOR "_non-monitor._sub."SERVICE_TYPE_SOURCE
  66
  67 static const char* const valid_modargs[] = {
  68     NULL
  69 };
  70
  71 enum service_subtype {
  72     SUBTYPE_HARDWARE,
  73     SUBTYPE_VIRTUAL,
  74     SUBTYPE_MONITOR
  75 };
  76
  77 struct service {
  78     struct userdata *userdata;
  79     AvahiEntryGroup *entry_group;
  80     char *service_name;
  81     pa_object *device;
  82     enum service_subtype subtype;
  83 };
  84
  85 struct userdata {
  86     pa_core *core;
  87     pa_module *module;
  88
  89     AvahiPoll *avahi_poll;
  90     AvahiClient *client;
  91
  92     pa_hashmap *services;
  93     char *service_name;
  94
  95     AvahiEntryGroup *main_entry_group;
  96
  97     pa_hook_slot *sink_new_slot, *source_new_slot, *sink_unlink_slot, *source_unlink_slot, *sink_changed_slot, *source_changed_slot;
  98
  99     pa_native_protocol *native;
 100 };
 101
 102 static void get_service_data(struct service *s, pa_sample_spec *ret_ss, pa_channel_map *ret_map, const char **ret_name, pa_proplist **ret_proplist, enum service_subtype *ret_subtype) {
 103     pa_assert(s);
 104     pa_assert(ret_ss);
 105     pa_assert(ret_proplist);
 106     pa_assert(ret_subtype);
 107
 108     if (pa_sink_isinstance(s->device)) {
 109         pa_sink *sink = PA_SINK(s->device);
 110
 111         *ret_ss = sink->sample_spec;
 112         *ret_map = sink->channel_map;
 113         *ret_name = sink->name;
 114         *ret_proplist = sink->proplist;
 115         *ret_subtype = sink->flags & PA_SINK_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL;
 116
 117     } else if (pa_source_isinstance(s->device)) {
 118         pa_source *source = PA_SOURCE(s->device);
 119
 120         *ret_ss = source->sample_spec;
 121         *ret_map = source->channel_map;
 122         *ret_name = source->name;
 123         *ret_proplist = source->proplist;
 124         *ret_subtype = source->monitor_of ? SUBTYPE_MONITOR : (source->flags & PA_SOURCE_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL);
 125
 126     } else
 127         pa_assert_not_reached();
 128 }
 129
 130 static AvahiStringList* txt_record_server_data(pa_core *c, AvahiStringList *l) {
 131     char s[128];
 132     char *t;
 133
 134     pa_assert(c);
 135
 136     l = avahi_string_list_add_pair(l, "server-version", PACKAGE_NAME" "PACKAGE_VERSION);
 137
 138     t = pa_get_user_name_malloc();
 139     l = avahi_string_list_add_pair(l, "user-name", t);
 140     pa_xfree(t);
 141
 142     t = pa_machine_id();
 143     l = avahi_string_list_add_pair(l, "machine-id", t);
 144     pa_xfree(t);
 145
 146     t = pa_uname_string();
 147     l = avahi_string_list_add_pair(l, "uname", t);
 148     pa_xfree(t);
 149
 150     l = avahi_string_list_add_pair(l, "fqdn", pa_get_fqdn(s, sizeof(s)));
 151     l = avahi_string_list_add_printf(l, "cookie=0x%08x", c->cookie);
 152
 153     return l;
 154 }
 155
 156 static int publish_service(struct service *s);
 157
 158 static void service_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
 159     struct service *s = userdata;
 160
 161     pa_assert(s);
 162
 163     switch (state) {
 164
 165         case AVAHI_ENTRY_GROUP_ESTABLISHED:
 166             pa_log_info("Successfully established service %s.", s->service_name);
 167             break;
 168
 169         case AVAHI_ENTRY_GROUP_COLLISION: {
 170             char *t;
 171
 172             t = avahi_alternative_service_name(s->service_name);
 173             pa_log_info("Name collision, renaming %s to %s.", s->service_name, t);
 174             pa_xfree(s->service_name);
 175             s->service_name = t;
 176
 177             publish_service(s);
 178             break;
 179         }
 180
 181         case AVAHI_ENTRY_GROUP_FAILURE: {
 182             pa_log("Failed to register service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
 183
 184             avahi_entry_group_free(g);
 185             s->entry_group = NULL;
 186
 187             break;
 188         }
 189
 190         case AVAHI_ENTRY_GROUP_UNCOMMITED:
 191         case AVAHI_ENTRY_GROUP_REGISTERING:
 192             ;
 193     }
 194 }
 195
 196 static void service_free(struct service *s);
 197
 198 static uint16_t compute_port(struct userdata *u) {
 199     pa_strlist *i;
 200
 201     pa_assert(u);
 202
 203     for (i = pa_native_protocol_servers(u->native); i; i = pa_strlist_next(i)) {
 204         pa_parsed_address a;
 205
 206         if (pa_parse_address(pa_strlist_data(i), &a) >= 0 &&
 207             (a.type == PA_PARSED_ADDRESS_TCP4 ||
 208              a.type == PA_PARSED_ADDRESS_TCP6 ||
 209              a.type == PA_PARSED_ADDRESS_TCP_AUTO) &&
 210             a.port > 0) {
 211
 212             pa_xfree(a.path_or_host);
 213             return a.port;
 214         }
 215
 216         pa_xfree(a.path_or_host);
 217     }
 218
 219     return PA_NATIVE_DEFAULT_PORT;
 220 }
 221
 222 static int publish_service(struct service *s) {
 223     int r = -1;
 224     AvahiStringList *txt = NULL;
 225     const char *name = NULL, *t;
 226     pa_proplist *proplist = NULL;
 227     pa_sample_spec ss;
 228     pa_channel_map map;
 229     char cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 230     enum service_subtype subtype;
 231
 232     const char * const subtype_text[] = {
 233         [SUBTYPE_HARDWARE] = "hardware",
 234         [SUBTYPE_VIRTUAL] = "virtual",
 235         [SUBTYPE_MONITOR] = "monitor"
 236     };
 237
 238     pa_assert(s);
 239
 240     if (!s->userdata->client || avahi_client_get_state(s->userdata->client) != AVAHI_CLIENT_S_RUNNING)
 241         return 0;
 242
 243     if (!s->entry_group) {
 244         if (!(s->entry_group = avahi_entry_group_new(s->userdata->client, service_entry_group_callback, s))) {
 245             pa_log("avahi_entry_group_new(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 246             goto finish;
 247         }
 248     } else
 249         avahi_entry_group_reset(s->entry_group);
 250
 251     txt = txt_record_server_data(s->userdata->core, txt);
 252
 253     get_service_data(s, &ss, &map, &name, &proplist, &subtype);
 254     txt = avahi_string_list_add_pair(txt, "device", name);
 255     txt = avahi_string_list_add_printf(txt, "rate=%u", ss.rate);
 256     txt = avahi_string_list_add_printf(txt, "channels=%u", ss.channels);
 257     txt = avahi_string_list_add_pair(txt, "format", pa_sample_format_to_string(ss.format));
 258     txt = avahi_string_list_add_pair(txt, "channel_map", pa_channel_map_snprint(cm, sizeof(cm), &map));
 259     txt = avahi_string_list_add_pair(txt, "subtype", subtype_text[subtype]);
 260
 261     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_DESCRIPTION)))
 262         txt = avahi_string_list_add_pair(txt, "description", t);
 263     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_ICON_NAME)))
 264         txt = avahi_string_list_add_pair(txt, "icon-name", t);
 265     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_VENDOR_NAME)))
 266         txt = avahi_string_list_add_pair(txt, "vendor-name", t);
 267     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_PRODUCT_NAME)))
 268         txt = avahi_string_list_add_pair(txt, "product-name", t);
 269     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_CLASS)))
 270         txt = avahi_string_list_add_pair(txt, "class", t);
 271     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_FORM_FACTOR)))
 272         txt = avahi_string_list_add_pair(txt, "form-factor", t);
 273
 274     if (avahi_entry_group_add_service_strlst(
 275                 s->entry_group,
 276                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 277                 0,
 278                 s->service_name,
 279                 pa_sink_isinstance(s->device) ? SERVICE_TYPE_SINK : SERVICE_TYPE_SOURCE,
 280                 NULL,
 281                 NULL,
 282                 compute_port(s->userdata),
 283                 txt) < 0) {
 284
 285         pa_log("avahi_entry_group_add_service_strlst(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 286         goto finish;
 287     }
 288
 289     if (avahi_entry_group_add_service_subtype(
 290                 s->entry_group,
 291                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 292                 0,
 293                 s->service_name,
 294                 pa_sink_isinstance(s->device) ? SERVICE_TYPE_SINK : SERVICE_TYPE_SOURCE,
 295                 NULL,
 296                 pa_sink_isinstance(s->device) ? (subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SINK_HARDWARE : SERVICE_SUBTYPE_SINK_VIRTUAL) :
 297                 (subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SOURCE_HARDWARE : (subtype == SUBTYPE_VIRTUAL ? SERVICE_SUBTYPE_SOURCE_VIRTUAL : SERVICE_SUBTYPE_SOURCE_MONITOR))) < 0) {
 298
 299         pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 300         goto finish;
 301     }
 302
 303     if (pa_source_isinstance(s->device) && subtype != SUBTYPE_MONITOR) {
 304         if (avahi_entry_group_add_service_subtype(
 305                     s->entry_group,
 306                     AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 307                     0,
 308                     s->service_name,
 309                     SERVICE_TYPE_SOURCE,
 310                     NULL,
 311                     SERVICE_SUBTYPE_SOURCE_NON_MONITOR) < 0) {
 312
 313             pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 314             goto finish;
 315         }
 316     }
 317
 318     if (avahi_entry_group_commit(s->entry_group) < 0) {
 319         pa_log("avahi_entry_group_commit(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 320         goto finish;
 321     }
 322
 323     r = 0;
 324     pa_log_debug("Successfully created entry group for %s.", s->service_name);
 325
 326 finish:
 327
 328     /* Remove this service */
 329     if (r < 0)
 330         service_free(s);
 331
 332     avahi_string_list_free(txt);
 333
 334     return r;
 335 }
 336
 337 static struct service *get_service(struct userdata *u, pa_object *device) {
 338     struct service *s;
 339     char *hn, *un;
 340     const char *n;
 341
 342     pa_assert(u);
 343     pa_object_assert_ref(device);
 344
 345     if ((s = pa_hashmap_get(u->services, device)))
 346         return s;
 347
 348     s = pa_xnew(struct service, 1);
 349     s->userdata = u;
 350     s->entry_group = NULL;
 351     s->device = device;
 352
 353     if (pa_sink_isinstance(device)) {
 354         if (!(n = pa_proplist_gets(PA_SINK(device)->proplist, PA_PROP_DEVICE_DESCRIPTION)))
 355             n = PA_SINK(device)->name;
 356     } else {
 357         if (!(n = pa_proplist_gets(PA_SOURCE(device)->proplist, PA_PROP_DEVICE_DESCRIPTION)))
 358             n = PA_SOURCE(device)->name;
 359     }
 360
 361     hn = pa_get_host_name_malloc();
 362     un = pa_get_user_name_malloc();
 363
 364     s->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s: %s", un, hn, n), AVAHI_LABEL_MAX-1);
 365
 366     pa_xfree(un);
 367     pa_xfree(hn);
 368
 369     pa_hashmap_put(u->services, s->device, s);
 370
 371     return s;
 372 }
 373
 374 static void service_free(struct service *s) {
 375     pa_assert(s);
 376
 377     pa_hashmap_remove(s->userdata->services, s->device);
 378
 379     if (s->entry_group) {
 380         pa_log_debug("Removing entry group for %s.", s->service_name);
 381         avahi_entry_group_free(s->entry_group);
 382     }
 383
 384     pa_xfree(s->service_name);
 385     pa_xfree(s);
 386 }
 387
 388 static pa_bool_t shall_ignore(pa_object *o) {
 389     pa_object_assert_ref(o);
 390
 391     if (pa_sink_isinstance(o))
 392         return !!(PA_SINK(o)->flags & PA_SINK_NETWORK);
 393
 394     if (pa_source_isinstance(o))
 395         return PA_SOURCE(o)->monitor_of || (PA_SOURCE(o)->flags & PA_SOURCE_NETWORK);
 396
 397     pa_assert_not_reached();
 398 }
 399
 400 static pa_hook_result_t device_new_or_changed_cb(pa_core *c, pa_object *o, struct userdata *u) {
 401     pa_assert(c);
 402     pa_object_assert_ref(o);
 403
 404     if (!shall_ignore(o))
 405         publish_service(get_service(u, o));
 406
 407     return PA_HOOK_OK;
 408 }
 409
 410 static pa_hook_result_t device_unlink_cb(pa_core *c, pa_object *o, struct userdata *u) {
 411     struct service *s;
 412
 413     pa_assert(c);
 414     pa_object_assert_ref(o);
 415
 416     if ((s = pa_hashmap_get(u->services, o)))
 417         service_free(s);
 418
 419     return PA_HOOK_OK;
 420 }
 421
 422 static int publish_main_service(struct userdata *u);
 423
 424 static void main_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
 425     struct userdata *u = userdata;
 426     pa_assert(u);
 427
 428     switch (state) {
 429
 430         case AVAHI_ENTRY_GROUP_ESTABLISHED:
 431             pa_log_info("Successfully established main service.");
 432             break;
 433
 434         case AVAHI_ENTRY_GROUP_COLLISION: {
 435             char *t;
 436
 437             t = avahi_alternative_service_name(u->service_name);
 438             pa_log_info("Name collision: renaming main service %s to %s.", u->service_name, t);
 439             pa_xfree(u->service_name);
 440             u->service_name = t;
 441
 442             publish_main_service(u);
 443             break;
 444         }
 445
 446         case AVAHI_ENTRY_GROUP_FAILURE: {
 447             pa_log("Failed to register main service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
 448
 449             avahi_entry_group_free(g);
 450             u->main_entry_group = NULL;
 451             break;
 452         }
 453
 454         case AVAHI_ENTRY_GROUP_UNCOMMITED:
 455         case AVAHI_ENTRY_GROUP_REGISTERING:
 456             break;
 457     }
 458 }
 459
 460 static int publish_main_service(struct userdata *u) {
 461     AvahiStringList *txt = NULL;
 462     int r = -1;
 463
 464     pa_assert(u);
 465
 466     if (!u->main_entry_group) {
 467         if (!(u->main_entry_group = avahi_entry_group_new(u->client, main_entry_group_callback, u))) {
 468             pa_log("avahi_entry_group_new() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 469             goto fail;
 470         }
 471     } else
 472         avahi_entry_group_reset(u->main_entry_group);
 473
 474     txt = txt_record_server_data(u->core, txt);
 475
 476     if (avahi_entry_group_add_service_strlst(
 477                 u->main_entry_group,
 478                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 479                 0,
 480                 u->service_name,
 481                 SERVICE_TYPE_SERVER,
 482                 NULL,
 483                 NULL,
 484                 compute_port(u),
 485                 txt) < 0) {
 486
 487         pa_log("avahi_entry_group_add_service_strlst() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 488         goto fail;
 489     }
 490
 491     if (avahi_entry_group_commit(u->main_entry_group) < 0) {
 492         pa_log("avahi_entry_group_commit() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 493         goto fail;
 494     }
 495
 496     r = 0;
 497
 498 fail:
 499     avahi_string_list_free(txt);
 500
 501     return r;
 502 }
 503
 504 static int publish_all_services(struct userdata *u) {
 505     pa_sink *sink;
 506     pa_source *source;
 507     int r = -1;
 508     uint32_t idx;
 509
 510     pa_assert(u);
 511
 512     pa_log_debug("Publishing services in Zeroconf");
 513
 514     for (sink = PA_SINK(pa_idxset_first(u->core->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(u->core->sinks, &idx)))
 515         if (!shall_ignore(PA_OBJECT(sink)))
 516             publish_service(get_service(u, PA_OBJECT(sink)));
 517
 518     for (source = PA_SOURCE(pa_idxset_first(u->core->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(u->core->sources, &idx)))
 519         if (!shall_ignore(PA_OBJECT(source)))
 520             publish_service(get_service(u, PA_OBJECT(source)));
 521
 522     if (publish_main_service(u) < 0)
 523         goto fail;
 524
 525     r = 0;
 526
 527 fail:
 528     return r;
 529 }
 530
 531 static void unpublish_all_services(struct userdata *u, pa_bool_t rem) {
 532     void *state = NULL;
 533     struct service *s;
 534
 535     pa_assert(u);
 536
 537     pa_log_debug("Unpublishing services in Zeroconf");
 538
 539     while ((s = pa_hashmap_iterate(u->services, &state, NULL))) {
 540         if (s->entry_group) {
 541             if (rem) {
 542                 pa_log_debug("Removing entry group for %s.", s->service_name);
 543                 avahi_entry_group_free(s->entry_group);
 544                 s->entry_group = NULL;
 545             } else {
 546                 avahi_entry_group_reset(s->entry_group);
 547                 pa_log_debug("Resetting entry group for %s.", s->service_name);
 548             }
 549         }
 550     }
 551
 552     if (u->main_entry_group) {
 553         if (rem) {
 554             pa_log_debug("Removing main entry group.");
 555             avahi_entry_group_free(u->main_entry_group);
 556             u->main_entry_group = NULL;
 557         } else {
 558             avahi_entry_group_reset(u->main_entry_group);
 559             pa_log_debug("Resetting main entry group.");
 560         }
 561     }
 562 }
 563
 564 static void client_callback(AvahiClient *c, AvahiClientState state, void *userdata) {
 565     struct userdata *u = userdata;
 566
 567     pa_assert(c);
 568     pa_assert(u);
 569
 570     u->client = c;
 571
 572     switch (state) {
 573         case AVAHI_CLIENT_S_RUNNING:
 574             publish_all_services(u);
 575             break;
 576
 577         case AVAHI_CLIENT_S_COLLISION:
 578             pa_log_debug("Host name collision");
 579             unpublish_all_services(u, FALSE);
 580             break;
 581
 582         case AVAHI_CLIENT_FAILURE:
 583             if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
 584                 int error;
 585
 586                 pa_log_debug("Avahi daemon disconnected.");
 587
 588                 unpublish_all_services(u, TRUE);
 589                 avahi_client_free(u->client);
 590
 591                 if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
 592                     pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
 593                     pa_module_unload_request(u->module, TRUE);
 594                 }
 595             }
 596
 597             break;
 598
 599         default: ;
 600     }
 601 }
 602
 603 int pa__init(pa_module*m) {
 604
 605     struct userdata *u;
 606     pa_modargs *ma = NULL;
 607     char *hn, *un;
 608     int error;
 609
 610     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 611         pa_log("Failed to parse module arguments.");
 612         goto fail;
 613     }
 614
 615     m->userdata = u = pa_xnew(struct userdata, 1);
 616     u->core = m->core;
 617     u->module = m;
 618     u->native = pa_native_protocol_get(u->core);
 619
 620     u->avahi_poll = pa_avahi_poll_new(m->core->mainloop);
 621
 622     u->services = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 623
 624     u->sink_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
 625     u->sink_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
 626     u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) device_unlink_cb, u);
 627     u->source_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
 628     u->source_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
 629     u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) device_unlink_cb, u);
 630
 631     u->main_entry_group = NULL;
 632
 633     un = pa_get_user_name_malloc();
 634     hn = pa_get_host_name_malloc();
 635     u->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s", un, hn), AVAHI_LABEL_MAX-1);
 636     pa_xfree(un);
 637     pa_xfree(hn);
 638
 639     if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
 640         pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
 641         goto fail;
 642     }
 643
 644     pa_modargs_free(ma);
 645
 646     return 0;
 647
 648 fail:
 649     pa__done(m);
 650
 651     if (ma)
 652         pa_modargs_free(ma);
 653
 654     return -1;
 655 }
 656
 657 void pa__done(pa_module*m) {
 658     struct userdata*u;
 659     pa_assert(m);
 660
 661     if (!(u = m->userdata))
 662         return;
 663
 664     if (u->services) {
 665         struct service *s;
 666
 667         while ((s = pa_hashmap_first(u->services)))
 668             service_free(s);
 669
 670         pa_hashmap_free(u->services, NULL, NULL);
 671     }
 672
 673     if (u->sink_new_slot)
 674         pa_hook_slot_free(u->sink_new_slot);
 675     if (u->source_new_slot)
 676         pa_hook_slot_free(u->source_new_slot);
 677     if (u->sink_changed_slot)
 678         pa_hook_slot_free(u->sink_changed_slot);
 679     if (u->source_changed_slot)
 680         pa_hook_slot_free(u->source_changed_slot);
 681     if (u->sink_unlink_slot)
 682         pa_hook_slot_free(u->sink_unlink_slot);
 683     if (u->source_unlink_slot)
 684         pa_hook_slot_free(u->source_unlink_slot);
 685
 686     if (u->main_entry_group)
 687         avahi_entry_group_free(u->main_entry_group);
 688
 689     if (u->client)
 690         avahi_client_free(u->client);
 691
 692     if (u->avahi_poll)
 693         pa_avahi_poll_free(u->avahi_poll);
 694
 695     if (u->native)
 696         pa_native_protocol_unref(u->native);
 697
 698     pa_xfree(u->service_name);
 699     pa_xfree(u);
 700 }