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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2009 Daniel Mack
   5   based on module-zeroconf-publish.c
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as
   9   published by the Free Software Foundation; either version 2.1 of the
  10   License, or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public
  18   License along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <dns_sd.h>
  32
  33 #include <CoreFoundation/CoreFoundation.h>
  34
  35 #include <pulse/xmalloc.h>
  36 #include <pulse/util.h>
  37
  38 #include <pulsecore/parseaddr.h>
  39 #include <pulsecore/sink.h>
  40 #include <pulsecore/source.h>
  41 #include <pulsecore/native-common.h>
  42 #include <pulsecore/core-util.h>
  43 #include <pulsecore/log.h>
  44 #include <pulsecore/dynarray.h>
  45 #include <pulsecore/modargs.h>
  46 #include <pulsecore/protocol-native.h>
  47
  48 #include "module-bonjour-publish-symdef.h"
  49
  50 PA_MODULE_AUTHOR("Daniel Mack");
  51 PA_MODULE_DESCRIPTION("Mac OS X Bonjour Service Publisher");
  52 PA_MODULE_VERSION(PACKAGE_VERSION);
  53 PA_MODULE_LOAD_ONCE(TRUE);
  54
  55 #define SERVICE_TYPE_SINK "_pulse-sink._tcp"
  56 #define SERVICE_TYPE_SOURCE "_pulse-source._tcp"
  57 #define SERVICE_TYPE_SERVER "_pulse-server._tcp"
  58
  59 static const char* const valid_modargs[] = {
  60     NULL
  61 };
  62
  63 enum service_subtype {
  64     SUBTYPE_HARDWARE,
  65     SUBTYPE_VIRTUAL,
  66     SUBTYPE_MONITOR
  67 };
  68
  69 struct service {
  70     struct userdata *userdata;
  71     DNSServiceRef service;
  72     DNSRecordRef rec, rec2;
  73     char *service_name;
  74     pa_object *device;
  75     enum service_subtype subtype;
  76 };
  77
  78 struct userdata {
  79     pa_core *core;
  80     pa_module *module;
  81
  82     pa_hashmap *services;
  83     char *service_name;
  84
  85     pa_hook_slot *sink_new_slot, *source_new_slot, *sink_unlink_slot, *source_unlink_slot, *sink_changed_slot, *source_changed_slot;
  86
  87     pa_native_protocol *native;
  88     DNSServiceRef main_service;
  89 };
  90
  91 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) {
  92     pa_assert(s);
  93     pa_assert(ret_ss);
  94     pa_assert(ret_proplist);
  95     pa_assert(ret_subtype);
  96
  97     if (pa_sink_isinstance(s->device)) {
  98         pa_sink *sink = PA_SINK(s->device);
  99
 100         *ret_ss = sink->sample_spec;
 101         *ret_map = sink->channel_map;
 102         *ret_name = sink->name;
 103         *ret_proplist = sink->proplist;
 104         *ret_subtype = sink->flags & PA_SINK_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL;
 105
 106     } else if (pa_source_isinstance(s->device)) {
 107         pa_source *source = PA_SOURCE(s->device);
 108
 109         *ret_ss = source->sample_spec;
 110         *ret_map = source->channel_map;
 111         *ret_name = source->name;
 112         *ret_proplist = source->proplist;
 113         *ret_subtype = source->monitor_of ? SUBTYPE_MONITOR : (source->flags & PA_SOURCE_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL);
 114
 115     } else
 116         pa_assert_not_reached();
 117 }
 118
 119 static void txt_record_server_data(pa_core *c, TXTRecordRef *txt) {
 120     char s[128];
 121     char *t;
 122
 123     pa_assert(c);
 124
 125     TXTRecordSetValue(txt, "server-version", strlen(PACKAGE_NAME" "PACKAGE_VERSION), PACKAGE_NAME" "PACKAGE_VERSION);
 126
 127     t = pa_get_user_name_malloc();
 128     TXTRecordSetValue(txt, "user-name", strlen(t), t);
 129     pa_xfree(t);
 130
 131     t = pa_machine_id();
 132     TXTRecordSetValue(txt, "machine-id", strlen(t), t);
 133     pa_xfree(t);
 134
 135     t = pa_uname_string();
 136     TXTRecordSetValue(txt, "uname", strlen(t), t);
 137     pa_xfree(t);
 138
 139     t = pa_get_fqdn(s, sizeof(s));
 140     TXTRecordSetValue(txt, "fqdn", strlen(t), t);
 141
 142     snprintf(s, sizeof(s), "0x%08x", c->cookie);
 143     TXTRecordSetValue(txt, "cookie", strlen(s), s);
 144 }
 145
 146 static void service_free(struct service *s);
 147
 148 static void dns_service_register_reply(DNSServiceRef sdRef,
 149                                        DNSServiceFlags flags,
 150                                        DNSServiceErrorType errorCode,
 151                                        const char *name,
 152                                        const char *regtype,
 153                                        const char *domain,
 154                                        void *context) {
 155     struct service *s = context;
 156
 157     pa_assert(s);
 158
 159     switch (errorCode) {
 160     case kDNSServiceErr_NameConflict:
 161         pa_log("DNS service reported kDNSServiceErr_NameConflict\n");
 162         service_free(s);
 163         break;
 164
 165     case kDNSServiceErr_NoError:
 166     default:
 167         break;
 168     }
 169 }
 170
 171 static uint16_t compute_port(struct userdata *u) {
 172     pa_strlist *i;
 173
 174     pa_assert(u);
 175
 176     for (i = pa_native_protocol_servers(u->native); i; i = pa_strlist_next(i)) {
 177         pa_parsed_address a;
 178
 179         if (pa_parse_address(pa_strlist_data(i), &a) >= 0 &&
 180             (a.type == PA_PARSED_ADDRESS_TCP4 ||
 181              a.type == PA_PARSED_ADDRESS_TCP6 ||
 182              a.type == PA_PARSED_ADDRESS_TCP_AUTO) &&
 183             a.port > 0) {
 184
 185             pa_xfree(a.path_or_host);
 186             return a.port;
 187         }
 188
 189         pa_xfree(a.path_or_host);
 190     }
 191
 192     return PA_NATIVE_DEFAULT_PORT;
 193 }
 194
 195 static int publish_service(struct service *s) {
 196     int r = -1;
 197     TXTRecordRef txt;
 198     DNSServiceErrorType err;
 199     const char *name = NULL, *t;
 200     pa_proplist *proplist = NULL;
 201     pa_sample_spec ss;
 202     pa_channel_map map;
 203     char cm[PA_CHANNEL_MAP_SNPRINT_MAX], tmp[64];
 204     enum service_subtype subtype;
 205
 206     const char * const subtype_text[] = {
 207         [SUBTYPE_HARDWARE] = "hardware",
 208         [SUBTYPE_VIRTUAL] = "virtual",
 209         [SUBTYPE_MONITOR] = "monitor"
 210     };
 211
 212     pa_assert(s);
 213
 214     if (s->service) {
 215         DNSServiceRefDeallocate(s->service);
 216         s->service = NULL;
 217     }
 218
 219     TXTRecordCreate(&txt, 0, NULL);
 220
 221     txt_record_server_data(s->userdata->core, &txt);
 222
 223     get_service_data(s, &ss, &map, &name, &proplist, &subtype);
 224     TXTRecordSetValue(&txt, "device", strlen(name), name);
 225
 226     snprintf(tmp, sizeof(tmp), "%u", ss.rate);
 227     TXTRecordSetValue(&txt, "rate", strlen(tmp), tmp);
 228
 229     snprintf(tmp, sizeof(tmp), "%u", ss.channels);
 230     TXTRecordSetValue(&txt, "channels", strlen(tmp), tmp);
 231
 232     t = pa_sample_format_to_string(ss.format);
 233     TXTRecordSetValue(&txt, "format", strlen(t), t);
 234
 235     t = pa_channel_map_snprint(cm, sizeof(cm), &map);
 236     TXTRecordSetValue(&txt, "channel_map", strlen(t), t);
 237
 238     t = subtype_text[subtype];
 239     TXTRecordSetValue(&txt, "subtype", strlen(t), t);
 240
 241     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_DESCRIPTION)))
 242         TXTRecordSetValue(&txt, "description", strlen(t), t);
 243     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_ICON_NAME)))
 244         TXTRecordSetValue(&txt, "icon-name", strlen(t), t);
 245     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_VENDOR_NAME)))
 246         TXTRecordSetValue(&txt, "vendor-name", strlen(t), t);
 247     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_PRODUCT_NAME)))
 248         TXTRecordSetValue(&txt, "product-name", strlen(t), t);
 249     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_CLASS)))
 250         TXTRecordSetValue(&txt, "class", strlen(t), t);
 251     if ((t = pa_proplist_gets(proplist, PA_PROP_DEVICE_FORM_FACTOR)))
 252         TXTRecordSetValue(&txt, "form-factor", strlen(t), t);
 253
 254     err = DNSServiceRegister(&s->service,
 255                              0,         /* flags */
 256                              kDNSServiceInterfaceIndexAny,
 257                              s->service_name,
 258                              pa_sink_isinstance(s->device) ? SERVICE_TYPE_SINK : SERVICE_TYPE_SOURCE,
 259                              NULL,      /* domain */
 260                              NULL,      /* host */
 261                              compute_port(s->userdata),
 262                              TXTRecordGetLength(&txt),
 263                              TXTRecordGetBytesPtr(&txt),
 264                              dns_service_register_reply, s);
 265
 266     if (err != kDNSServiceErr_NoError) {
 267         pa_log("DNSServiceRegister() returned err %d", err);
 268         goto finish;
 269     }
 270
 271     pa_log_debug("Successfully registered Bonjour services for >%s<.", s->service_name);
 272     return 0;
 273
 274 finish:
 275
 276     /* Remove this service */
 277     if (r < 0)
 278         service_free(s);
 279
 280     TXTRecordDeallocate(&txt);
 281
 282     return r;
 283 }
 284
 285 static struct service *get_service(struct userdata *u, pa_object *device) {
 286     struct service *s;
 287     char *hn, *un;
 288     const char *n;
 289
 290     pa_assert(u);
 291     pa_object_assert_ref(device);
 292
 293     if ((s = pa_hashmap_get(u->services, device)))
 294         return s;
 295
 296     s = pa_xnew0(struct service, 1);
 297     s->userdata = u;
 298     s->device = device;
 299
 300     if (pa_sink_isinstance(device)) {
 301         if (!(n = pa_proplist_gets(PA_SINK(device)->proplist, PA_PROP_DEVICE_DESCRIPTION)))
 302             n = PA_SINK(device)->name;
 303     } else {
 304         if (!(n = pa_proplist_gets(PA_SOURCE(device)->proplist, PA_PROP_DEVICE_DESCRIPTION)))
 305             n = PA_SOURCE(device)->name;
 306     }
 307
 308     hn = pa_get_host_name_malloc();
 309     un = pa_get_user_name_malloc();
 310
 311     s->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s: %s", un, hn, n), kDNSServiceMaxDomainName-1);
 312
 313     pa_xfree(un);
 314     pa_xfree(hn);
 315
 316     pa_hashmap_put(u->services, s->device, s);
 317
 318     return s;
 319 }
 320
 321 static void service_free(struct service *s) {
 322     pa_assert(s);
 323
 324     pa_hashmap_remove(s->userdata->services, s->device);
 325
 326     if (s->service)
 327         DNSServiceRefDeallocate(s->service);
 328
 329     pa_xfree(s->service_name);
 330     pa_xfree(s);
 331 }
 332
 333 static pa_bool_t shall_ignore(pa_object *o) {
 334     pa_object_assert_ref(o);
 335
 336     if (pa_sink_isinstance(o))
 337         return !!(PA_SINK(o)->flags & PA_SINK_NETWORK);
 338
 339     if (pa_source_isinstance(o))
 340         return PA_SOURCE(o)->monitor_of || (PA_SOURCE(o)->flags & PA_SOURCE_NETWORK);
 341
 342     pa_assert_not_reached();
 343 }
 344
 345 static pa_hook_result_t device_new_or_changed_cb(pa_core *c, pa_object *o, struct userdata *u) {
 346     pa_assert(c);
 347     pa_object_assert_ref(o);
 348
 349     if (!shall_ignore(o))
 350         publish_service(get_service(u, o));
 351
 352     return PA_HOOK_OK;
 353 }
 354
 355 static pa_hook_result_t device_unlink_cb(pa_core *c, pa_object *o, struct userdata *u) {
 356     struct service *s;
 357
 358     pa_assert(c);
 359     pa_object_assert_ref(o);
 360
 361     if ((s = pa_hashmap_get(u->services, o)))
 362         service_free(s);
 363
 364     return PA_HOOK_OK;
 365 }
 366
 367 static int publish_main_service(struct userdata *u) {
 368     DNSServiceErrorType err;
 369     TXTRecordRef txt;
 370
 371     pa_assert(u);
 372
 373     if (u->main_service) {
 374         DNSServiceRefDeallocate(u->main_service);
 375         u->main_service = NULL;
 376     }
 377
 378     TXTRecordCreate(&txt, 0, NULL);
 379     txt_record_server_data(u->core, &txt);
 380
 381     err = DNSServiceRegister(&u->main_service,
 382                              0, /* flags */
 383                              kDNSServiceInterfaceIndexAny,
 384                              u->service_name,
 385                              SERVICE_TYPE_SERVER,
 386                              NULL, /* domain */
 387                              NULL, /* host */
 388                              compute_port(u),
 389                              TXTRecordGetLength(&txt),
 390                              TXTRecordGetBytesPtr(&txt),
 391                              NULL, NULL);
 392
 393     if (err != kDNSServiceErr_NoError) {
 394         pa_log("%s(): DNSServiceRegister() returned err %d", __func__, err);
 395         return err;
 396     }
 397
 398     TXTRecordDeallocate(&txt);
 399
 400     return 0;
 401 }
 402
 403 static int publish_all_services(struct userdata *u) {
 404     pa_sink *sink;
 405     pa_source *source;
 406     uint32_t idx;
 407
 408     pa_assert(u);
 409
 410     pa_log_debug("Publishing services in Bonjour");
 411
 412     for (sink = PA_SINK(pa_idxset_first(u->core->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(u->core->sinks, &idx)))
 413         if (!shall_ignore(PA_OBJECT(sink)))
 414             publish_service(get_service(u, PA_OBJECT(sink)));
 415
 416     for (source = PA_SOURCE(pa_idxset_first(u->core->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(u->core->sources, &idx)))
 417         if (!shall_ignore(PA_OBJECT(source)))
 418             publish_service(get_service(u, PA_OBJECT(source)));
 419
 420     return publish_main_service(u);
 421 }
 422
 423 static void unpublish_all_services(struct userdata *u) {
 424     void *state = NULL;
 425     struct service *s;
 426
 427     pa_assert(u);
 428
 429     pa_log_debug("Unpublishing services in Bonjour");
 430
 431     while ((s = pa_hashmap_iterate(u->services, &state, NULL)))
 432         service_free(s);
 433
 434     if (u->main_service)
 435         DNSServiceRefDeallocate(u->main_service);
 436 }
 437
 438 int pa__init(pa_module*m) {
 439
 440     struct userdata *u;
 441     pa_modargs *ma = NULL;
 442     char *hn, *un;
 443
 444     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 445         pa_log("Failed to parse module arguments.");
 446         goto fail;
 447     }
 448
 449     m->userdata = u = pa_xnew0(struct userdata, 1);
 450     u->core = m->core;
 451     u->module = m;
 452     u->native = pa_native_protocol_get(u->core);
 453
 454     u->services = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 455
 456     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);
 457     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);
 458     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);
 459     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);
 460     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);
 461     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);
 462
 463     un = pa_get_user_name_malloc();
 464     hn = pa_get_host_name_malloc();
 465     u->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s", un, hn), kDNSServiceMaxDomainName-1);
 466     pa_xfree(un);
 467     pa_xfree(hn);
 468
 469     publish_all_services(u);
 470     pa_modargs_free(ma);
 471
 472     return 0;
 473
 474 fail:
 475     pa__done(m);
 476
 477     if (ma)
 478         pa_modargs_free(ma);
 479
 480     return -1;
 481 }
 482
 483 void pa__done(pa_module*m) {
 484     struct userdata*u;
 485     pa_assert(m);
 486
 487     if (!(u = m->userdata))
 488         return;
 489
 490     unpublish_all_services(u);
 491
 492     if (u->services)
 493         pa_hashmap_free(u->services, NULL);
 494
 495     if (u->sink_new_slot)
 496         pa_hook_slot_free(u->sink_new_slot);
 497     if (u->source_new_slot)
 498         pa_hook_slot_free(u->source_new_slot);
 499     if (u->sink_changed_slot)
 500         pa_hook_slot_free(u->sink_changed_slot);
 501     if (u->source_changed_slot)
 502         pa_hook_slot_free(u->source_changed_slot);
 503     if (u->sink_unlink_slot)
 504         pa_hook_slot_free(u->sink_unlink_slot);
 505     if (u->source_unlink_slot)
 506         pa_hook_slot_free(u->source_unlink_slot);
 507
 508     if (u->native)
 509         pa_native_protocol_unref(u->native);
 510
 511     pa_xfree(u->service_name);
 512     pa_xfree(u);
 513 }