code.delx.au - pulseaudio/blob - src/modules/module-zeroconf-publish.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as
  10   published by the Free Software Foundation; either version 2 of the
  11   License, or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public
  19   License along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32
  33 #include <avahi-client/client.h>
  34 #include <avahi-client/publish.h>
  35 #include <avahi-common/alternative.h>
  36 #include <avahi-common/error.h>
  37 #include <avahi-common/domain.h>
  38
  39 #include <pulse/xmalloc.h>
  40 #include <pulse/util.h>
  41
  42 #include <pulsecore/sink.h>
  43 #include <pulsecore/source.h>
  44 #include <pulsecore/native-common.h>
  45 #include <pulsecore/core-util.h>
  46 #include <pulsecore/log.h>
  47 #include <pulsecore/core-subscribe.h>
  48 #include <pulsecore/dynarray.h>
  49 #include <pulsecore/modargs.h>
  50 #include <pulsecore/avahi-wrap.h>
  51 #include <pulsecore/endianmacros.h>
  52
  53 #include "module-zeroconf-publish-symdef.h"
  54
  55 PA_MODULE_AUTHOR("Lennart Poettering")
  56 PA_MODULE_DESCRIPTION("mDNS/DNS-SD Service Publisher")
  57 PA_MODULE_VERSION(PACKAGE_VERSION)
  58 PA_MODULE_USAGE("port=<IP port number>")
  59
  60 #define SERVICE_TYPE_SINK "_pulse-sink._tcp"
  61 #define SERVICE_TYPE_SOURCE "_pulse-source._tcp"
  62 #define SERVICE_TYPE_SERVER "_pulse-server._tcp"
  63 #define SERVICE_SUBTYPE_SINK_HARDWARE "_hardware._sub."SERVICE_TYPE_SINK
  64 #define SERVICE_SUBTYPE_SINK_VIRTUAL "_virtual._sub."SERVICE_TYPE_SINK
  65 #define SERVICE_SUBTYPE_SOURCE_HARDWARE "_hardware._sub."SERVICE_TYPE_SOURCE
  66 #define SERVICE_SUBTYPE_SOURCE_VIRTUAL "_virtual._sub."SERVICE_TYPE_SOURCE
  67 #define SERVICE_SUBTYPE_SOURCE_MONITOR "_monitor._sub."SERVICE_TYPE_SOURCE
  68 #define SERVICE_SUBTYPE_SOURCE_NON_MONITOR "_non-monitor._sub."SERVICE_TYPE_SOURCE
  69
  70 static const char* const valid_modargs[] = {
  71     "port",
  72     NULL
  73 };
  74
  75 enum service_subtype {
  76     SUBTYPE_HARDWARE,
  77     SUBTYPE_VIRTUAL,
  78     SUBTYPE_MONITOR
  79 };
  80
  81 struct service {
  82     struct userdata *userdata;
  83     AvahiEntryGroup *entry_group;
  84     char *service_name;
  85     pa_object *device;
  86     enum service_subtype subtype;
  87 };
  88
  89 struct userdata {
  90     pa_core *core;
  91     pa_module *module;
  92     AvahiPoll *avahi_poll;
  93     AvahiClient *client;
  94
  95     pa_hashmap *services;
  96     char *service_name;
  97
  98     AvahiEntryGroup *main_entry_group;
  99
 100     uint16_t port;
 101
 102     pa_hook_slot *sink_new_slot, *source_new_slot, *sink_unlink_slot, *source_unlink_slot, *sink_changed_slot, *source_changed_slot;
 103 };
 104
 105 static void get_service_data(struct service *s, pa_sample_spec *ret_ss, pa_channel_map *ret_map, const char **ret_name, const char **ret_description, enum service_subtype *ret_subtype) {
 106     pa_assert(s);
 107     pa_assert(ret_ss);
 108     pa_assert(ret_description);
 109     pa_assert(ret_subtype);
 110
 111     if (pa_sink_isinstance(s->device)) {
 112         pa_sink *sink = PA_SINK(s->device);
 113
 114         *ret_ss = sink->sample_spec;
 115         *ret_map = sink->channel_map;
 116         *ret_name = sink->name;
 117         *ret_description = sink->description;
 118         *ret_subtype = sink->flags & PA_SINK_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL;
 119
 120     } else if (pa_source_isinstance(s->device)) {
 121         pa_source *source = PA_SOURCE(s->device);
 122
 123         *ret_ss = source->sample_spec;
 124         *ret_map = source->channel_map;
 125         *ret_name = source->name;
 126         *ret_description = source->description;
 127         *ret_subtype = source->monitor_of ? SUBTYPE_MONITOR : (source->flags & PA_SOURCE_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL);
 128
 129     } else
 130         pa_assert_not_reached();
 131 }
 132
 133 static AvahiStringList* txt_record_server_data(pa_core *c, AvahiStringList *l) {
 134     char s[128];
 135
 136     pa_assert(c);
 137
 138     l = avahi_string_list_add_pair(l, "server-version", PACKAGE_NAME" "PACKAGE_VERSION);
 139     l = avahi_string_list_add_pair(l, "user-name", pa_get_user_name(s, sizeof(s)));
 140     l = avahi_string_list_add_pair(l, "fqdn", pa_get_fqdn(s, sizeof(s)));
 141     l = avahi_string_list_add_printf(l, "cookie=0x%08x", c->cookie);
 142
 143     return l;
 144 }
 145
 146 static int publish_service(struct service *s);
 147
 148 static void service_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
 149     struct service *s = userdata;
 150
 151     pa_assert(s);
 152
 153     switch (state) {
 154
 155         case AVAHI_ENTRY_GROUP_ESTABLISHED:
 156             pa_log_info("Successfully established service %s.", s->service_name);
 157             break;
 158
 159         case AVAHI_ENTRY_GROUP_COLLISION: {
 160             char *t;
 161
 162             t = avahi_alternative_service_name(s->service_name);
 163             pa_log_info("Name collision, renaming %s to %s.", s->service_name, t);
 164             pa_xfree(s->service_name);
 165             s->service_name = t;
 166
 167             publish_service(s);
 168             break;
 169         }
 170
 171         case AVAHI_ENTRY_GROUP_FAILURE: {
 172             pa_log("Failed to register service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
 173
 174             avahi_entry_group_free(g);
 175             s->entry_group = NULL;
 176
 177             break;
 178         }
 179
 180         case AVAHI_ENTRY_GROUP_UNCOMMITED:
 181         case AVAHI_ENTRY_GROUP_REGISTERING:
 182             ;
 183     }
 184 }
 185
 186 static void service_free(struct service *s);
 187
 188 static int publish_service(struct service *s) {
 189     int r = -1;
 190     AvahiStringList *txt = NULL;
 191     const char *description = NULL, *name = NULL;
 192     pa_sample_spec ss;
 193     pa_channel_map map;
 194     char cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 195     enum service_subtype subtype;
 196
 197     const char * const subtype_text[] = {
 198         [SUBTYPE_HARDWARE] = "hardware",
 199         [SUBTYPE_VIRTUAL] = "virtual",
 200         [SUBTYPE_MONITOR] = "monitor"
 201     };
 202
 203     pa_assert(s);
 204
 205     if (!s->userdata->client || avahi_client_get_state(s->userdata->client) != AVAHI_CLIENT_S_RUNNING)
 206         return 0;
 207
 208     if (!s->entry_group) {
 209         if (!(s->entry_group = avahi_entry_group_new(s->userdata->client, service_entry_group_callback, s))) {
 210             pa_log("avahi_entry_group_new(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 211             goto finish;
 212         }
 213     } else
 214         avahi_entry_group_reset(s->entry_group);
 215
 216     txt = txt_record_server_data(s->userdata->core, txt);
 217
 218     get_service_data(s, &ss, &map, &name, &description, &subtype);
 219     txt = avahi_string_list_add_pair(txt, "device", name);
 220     txt = avahi_string_list_add_printf(txt, "rate=%u", ss.rate);
 221     txt = avahi_string_list_add_printf(txt, "channels=%u", ss.channels);
 222     txt = avahi_string_list_add_pair(txt, "format", pa_sample_format_to_string(ss.format));
 223     txt = avahi_string_list_add_pair(txt, "channel_map", pa_channel_map_snprint(cm, sizeof(cm), &map));
 224     txt = avahi_string_list_add_pair(txt, "subtype", subtype_text[subtype]);
 225
 226     if (avahi_entry_group_add_service_strlst(
 227                 s->entry_group,
 228                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 229                 0,
 230                 s->service_name,
 231                 pa_sink_isinstance(s->device) ? SERVICE_TYPE_SINK : SERVICE_TYPE_SOURCE,
 232                 NULL,
 233                 NULL,
 234                 s->userdata->port,
 235                 txt) < 0) {
 236
 237         pa_log("avahi_entry_group_add_service_strlst(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 238         goto finish;
 239     }
 240
 241     if (avahi_entry_group_add_service_subtype(
 242                 s->entry_group,
 243                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 244                 0,
 245                 s->service_name,
 246                 pa_sink_isinstance(s->device) ? SERVICE_TYPE_SINK : SERVICE_TYPE_SOURCE,
 247                 NULL,
 248                 pa_sink_isinstance(s->device) ? (subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SINK_HARDWARE : SERVICE_SUBTYPE_SINK_VIRTUAL) :
 249                 (subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SOURCE_HARDWARE : (subtype == SUBTYPE_VIRTUAL ? SERVICE_SUBTYPE_SOURCE_VIRTUAL : SERVICE_SUBTYPE_SOURCE_MONITOR))) < 0) {
 250
 251         pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 252         goto finish;
 253     }
 254
 255     if (pa_source_isinstance(s->device) && subtype != SUBTYPE_MONITOR) {
 256         if (avahi_entry_group_add_service_subtype(
 257                     s->entry_group,
 258                     AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 259                     0,
 260                     s->service_name,
 261                     SERVICE_TYPE_SOURCE,
 262                     NULL,
 263                     SERVICE_SUBTYPE_SOURCE_NON_MONITOR) < 0) {
 264
 265             pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 266             goto finish;
 267         }
 268     }
 269
 270     if (avahi_entry_group_commit(s->entry_group) < 0) {
 271         pa_log("avahi_entry_group_commit(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
 272         goto finish;
 273     }
 274
 275     r = 0;
 276     pa_log_debug("Successfully created entry group for %s.", s->service_name);
 277
 278 finish:
 279
 280     /* Remove this service */
 281     if (r < 0)
 282         service_free(s);
 283
 284     avahi_string_list_free(txt);
 285
 286     return r;
 287 }
 288
 289 static struct service *get_service(struct userdata *u, pa_object *device) {
 290     struct service *s;
 291     char hn[64], un[64];
 292     const char *n;
 293
 294     pa_assert(u);
 295     pa_object_assert_ref(device);
 296
 297     if ((s = pa_hashmap_get(u->services, device)))
 298         return s;
 299
 300     s = pa_xnew(struct service, 1);
 301     s->userdata = u;
 302     s->entry_group = NULL;
 303     s->device = device;
 304
 305     if (pa_sink_isinstance(device)) {
 306         if (!(n = PA_SINK(device)->description))
 307             n = PA_SINK(device)->name;
 308     } else {
 309         if (!(n = PA_SOURCE(device)->description))
 310             n = PA_SOURCE(device)->name;
 311     }
 312
 313     s->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s: %s",
 314                                                          pa_get_user_name(un, sizeof(un)),
 315                                                          pa_get_host_name(hn, sizeof(hn)),
 316                                                          n),
 317                                        AVAHI_LABEL_MAX-1);
 318
 319     pa_hashmap_put(u->services, s->device, s);
 320
 321     return s;
 322 }
 323
 324 static void service_free(struct service *s) {
 325     pa_assert(s);
 326
 327     pa_hashmap_remove(s->userdata->services, s->device);
 328
 329     if (s->entry_group) {
 330         pa_log_debug("Removing entry group for %s.", s->service_name);
 331         avahi_entry_group_free(s->entry_group);
 332     }
 333
 334     pa_xfree(s->service_name);
 335     pa_xfree(s);
 336 }
 337
 338 static pa_bool_t shall_ignore(pa_object *o) {
 339     pa_object_assert_ref(o);
 340
 341     if (pa_sink_isinstance(o))
 342         return !!(PA_SINK(o)->flags & PA_SINK_NETWORK);
 343
 344     if (pa_source_isinstance(o))
 345         return PA_SOURCE(o)->monitor_of || (PA_SOURCE(o)->flags & PA_SOURCE_NETWORK);
 346
 347     pa_assert_not_reached();
 348 }
 349
 350 static pa_hook_result_t device_new_or_changed_cb(pa_core *c, pa_object *o, struct userdata *u) {
 351     pa_assert(c);
 352     pa_object_assert_ref(o);
 353
 354     if (!shall_ignore(o))
 355         publish_service(get_service(u, o));
 356
 357     return PA_HOOK_OK;
 358 }
 359
 360 static pa_hook_result_t device_unlink_cb(pa_core *c, pa_object *o, struct userdata *u) {
 361     struct service *s;
 362
 363     pa_assert(c);
 364     pa_object_assert_ref(o);
 365
 366     if ((s = pa_hashmap_get(u->services, o)))
 367         service_free(s);
 368
 369     return PA_HOOK_OK;
 370 }
 371
 372 static int publish_main_service(struct userdata *u);
 373
 374 static void main_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
 375     struct userdata *u = userdata;
 376     pa_assert(u);
 377
 378     switch (state) {
 379
 380         case AVAHI_ENTRY_GROUP_ESTABLISHED:
 381             pa_log_info("Successfully established main service.");
 382             break;
 383
 384         case AVAHI_ENTRY_GROUP_COLLISION: {
 385             char *t;
 386
 387             t = avahi_alternative_service_name(u->service_name);
 388             pa_log_info("Name collision: renaming main service %s to %s.", u->service_name, t);
 389             pa_xfree(u->service_name);
 390             u->service_name = t;
 391
 392             publish_main_service(u);
 393             break;
 394         }
 395
 396         case AVAHI_ENTRY_GROUP_FAILURE: {
 397             pa_log("Failed to register main service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
 398
 399             avahi_entry_group_free(g);
 400             u->main_entry_group = NULL;
 401             break;
 402         }
 403
 404         case AVAHI_ENTRY_GROUP_UNCOMMITED:
 405         case AVAHI_ENTRY_GROUP_REGISTERING:
 406             break;
 407     }
 408 }
 409
 410 static int publish_main_service(struct userdata *u) {
 411     AvahiStringList *txt = NULL;
 412     int r = -1;
 413
 414     pa_assert(u);
 415
 416     if (!u->main_entry_group) {
 417         if (!(u->main_entry_group = avahi_entry_group_new(u->client, main_entry_group_callback, u))) {
 418             pa_log("avahi_entry_group_new() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 419             goto fail;
 420         }
 421     } else
 422         avahi_entry_group_reset(u->main_entry_group);
 423
 424     txt = txt_record_server_data(u->core, txt);
 425
 426     if (avahi_entry_group_add_service_strlst(
 427                 u->main_entry_group,
 428                 AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
 429                 0,
 430                 u->service_name,
 431                 SERVICE_TYPE_SERVER,
 432                 NULL,
 433                 NULL,
 434                 u->port,
 435                 txt) < 0) {
 436
 437         pa_log("avahi_entry_group_add_service_strlst() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 438         goto fail;
 439     }
 440
 441     if (avahi_entry_group_commit(u->main_entry_group) < 0) {
 442         pa_log("avahi_entry_group_commit() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
 443         goto fail;
 444     }
 445
 446     r = 0;
 447
 448 fail:
 449     avahi_string_list_free(txt);
 450
 451     return r;
 452 }
 453
 454 static int publish_all_services(struct userdata *u) {
 455     pa_sink *sink;
 456     pa_source *source;
 457     int r = -1;
 458     uint32_t idx;
 459
 460     pa_assert(u);
 461
 462     pa_log_debug("Publishing services in Zeroconf");
 463
 464     for (sink = PA_SINK(pa_idxset_first(u->core->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(u->core->sinks, &idx)))
 465         if (!shall_ignore(PA_OBJECT(sink)))
 466             publish_service(get_service(u, PA_OBJECT(sink)));
 467
 468     for (source = PA_SOURCE(pa_idxset_first(u->core->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(u->core->sources, &idx)))
 469         if (!shall_ignore(PA_OBJECT(source)))
 470             publish_service(get_service(u, PA_OBJECT(source)));
 471
 472     if (publish_main_service(u) < 0)
 473         goto fail;
 474
 475     r = 0;
 476
 477 fail:
 478     return r;
 479 }
 480
 481 static void unpublish_all_services(struct userdata *u, pa_bool_t rem) {
 482     void *state = NULL;
 483     struct service *s;
 484
 485     pa_assert(u);
 486
 487     pa_log_debug("Unpublishing services in Zeroconf");
 488
 489     while ((s = pa_hashmap_iterate(u->services, &state, NULL))) {
 490         if (s->entry_group) {
 491             if (rem) {
 492                 pa_log_debug("Removing entry group for %s.", s->service_name);
 493                 avahi_entry_group_free(s->entry_group);
 494                 s->entry_group = NULL;
 495             } else {
 496                 avahi_entry_group_reset(s->entry_group);
 497                 pa_log_debug("Resetting entry group for %s.", s->service_name);
 498             }
 499         }
 500     }
 501
 502     if (u->main_entry_group) {
 503         if (rem) {
 504             pa_log_debug("Removing main entry group.");
 505             avahi_entry_group_free(u->main_entry_group);
 506             u->main_entry_group = NULL;
 507         } else {
 508             avahi_entry_group_reset(u->main_entry_group);
 509             pa_log_debug("Resetting main entry group.");
 510         }
 511     }
 512 }
 513
 514 static void client_callback(AvahiClient *c, AvahiClientState state, void *userdata) {
 515     struct userdata *u = userdata;
 516
 517     pa_assert(c);
 518     pa_assert(u);
 519
 520     u->client = c;
 521
 522     switch (state) {
 523         case AVAHI_CLIENT_S_RUNNING:
 524             publish_all_services(u);
 525             break;
 526
 527         case AVAHI_CLIENT_S_COLLISION:
 528             pa_log_debug("Host name collision");
 529             unpublish_all_services(u, FALSE);
 530             break;
 531
 532         case AVAHI_CLIENT_FAILURE:
 533             if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
 534                 int error;
 535
 536                 pa_log_debug("Avahi daemon disconnected.");
 537
 538                 unpublish_all_services(u, TRUE);
 539                 avahi_client_free(u->client);
 540
 541                 if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
 542                     pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
 543                     pa_module_unload_request(u->module);
 544                 }
 545             }
 546
 547             break;
 548
 549         default: ;
 550     }
 551 }
 552
 553 int pa__init(pa_module*m) {
 554
 555     struct userdata *u;
 556     uint32_t port = PA_NATIVE_DEFAULT_PORT;
 557     pa_modargs *ma = NULL;
 558     char hn[256], un[256];
 559     int error;
 560
 561     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 562         pa_log("Failed to parse module arguments.");
 563         goto fail;
 564     }
 565
 566     if (pa_modargs_get_value_u32(ma, "port", &port) < 0 || port <= 0 || port > 0xFFFF) {
 567         pa_log("Invalid port specified.");
 568         goto fail;
 569     }
 570
 571     m->userdata = u = pa_xnew(struct userdata, 1);
 572     u->core = m->core;
 573     u->module = m;
 574     u->port = (uint16_t) port;
 575
 576     u->avahi_poll = pa_avahi_poll_new(m->core->mainloop);
 577
 578     u->services = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 579
 580     u->sink_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_NEW_POST], (pa_hook_cb_t) device_new_or_changed_cb, u);
 581     u->sink_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_DESCRIPTION_CHANGED], (pa_hook_cb_t) device_new_or_changed_cb, u);
 582     u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], (pa_hook_cb_t) device_unlink_cb, u);
 583     u->source_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_NEW_POST], (pa_hook_cb_t) device_new_or_changed_cb, u);
 584     u->source_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_DESCRIPTION_CHANGED], (pa_hook_cb_t) device_new_or_changed_cb, u);
 585     u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], (pa_hook_cb_t) device_unlink_cb, u);
 586
 587     u->main_entry_group = NULL;
 588
 589     u->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s", pa_get_user_name(un, sizeof(un)), pa_get_host_name(hn, sizeof(hn))), AVAHI_LABEL_MAX);
 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         goto fail;
 594     }
 595
 596     pa_modargs_free(ma);
 597
 598     return 0;
 599
 600 fail:
 601     pa__done(m);
 602
 603     if (ma)
 604         pa_modargs_free(ma);
 605
 606     return -1;
 607 }
 608
 609 void pa__done(pa_module*m) {
 610     struct userdata*u;
 611     pa_assert(m);
 612
 613     if (!(u = m->userdata))
 614         return;
 615
 616     if (u->services) {
 617         struct service *s;
 618
 619         while ((s = pa_hashmap_get_first(u->services)))
 620             service_free(s);
 621
 622         pa_hashmap_free(u->services, NULL, NULL);
 623     }
 624
 625     if (u->sink_new_slot)
 626         pa_hook_slot_free(u->sink_new_slot);
 627     if (u->source_new_slot)
 628         pa_hook_slot_free(u->source_new_slot);
 629     if (u->sink_changed_slot)
 630         pa_hook_slot_free(u->sink_changed_slot);
 631     if (u->source_changed_slot)
 632         pa_hook_slot_free(u->source_changed_slot);
 633     if (u->sink_unlink_slot)
 634         pa_hook_slot_free(u->sink_unlink_slot);
 635     if (u->source_unlink_slot)
 636         pa_hook_slot_free(u->source_unlink_slot);
 637
 638     if (u->main_entry_group)
 639         avahi_entry_group_free(u->main_entry_group);
 640
 641     if (u->client)
 642         avahi_client_free(u->client);
 643
 644     if (u->avahi_poll)
 645         pa_avahi_poll_free(u->avahi_poll);
 646
 647     pa_xfree(u->service_name);
 648     pa_xfree(u);
 649 }