code.delx.au - pulseaudio/blob - src/pulse/context.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   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 published
   8   by the Free Software Foundation; either version 2 of the License,
   9   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 License
  17   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 <assert.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <sys/types.h>
  31 #include <unistd.h>
  32 #include <sys/stat.h>
  33 #include <errno.h>
  34 #include <signal.h>
  35 #include <limits.h>
  36
  37 #ifdef HAVE_SYS_WAIT_H
  38 #include <sys/wait.h>
  39 #endif
  40
  41 #ifdef HAVE_SYS_SOCKET_H
  42 #include <sys/socket.h>
  43 #endif
  44 #ifdef HAVE_SYS_UN_H
  45 #include <sys/un.h>
  46 #endif
  47 #ifdef HAVE_NETDB_H
  48 #include <netdb.h>
  49 #endif
  50
  51 #include "../pulsecore/winsock.h"
  52
  53 #include <pulsecore/core-error.h>
  54 #include <pulse/version.h>
  55 #include <pulse/xmalloc.h>
  56
  57 #include <pulsecore/native-common.h>
  58 #include <pulsecore/pdispatch.h>
  59 #include <pulsecore/pstream.h>
  60 #include <pulsecore/dynarray.h>
  61 #include <pulsecore/socket-client.h>
  62 #include <pulsecore/pstream-util.h>
  63 #include <pulsecore/core-util.h>
  64 #include <pulsecore/log.h>
  65 #include <pulsecore/socket-util.h>
  66 #include <pulsecore/creds.h>
  67
  68 #include "internal.h"
  69
  70 #include "client-conf.h"
  71
  72 #ifdef HAVE_X11
  73 #include "client-conf-x11.h"
  74 #endif
  75
  76 #include "context.h"
  77
  78 #define AUTOSPAWN_LOCK "autospawn.lock"
  79
  80 static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = {
  81     [PA_COMMAND_REQUEST] = pa_command_request,
  82     [PA_COMMAND_OVERFLOW] = pa_command_overflow_or_underflow,
  83     [PA_COMMAND_UNDERFLOW] = pa_command_overflow_or_underflow,
  84     [PA_COMMAND_PLAYBACK_STREAM_KILLED] = pa_command_stream_killed,
  85     [PA_COMMAND_RECORD_STREAM_KILLED] = pa_command_stream_killed,
  86     [PA_COMMAND_SUBSCRIBE_EVENT] = pa_command_subscribe_event
  87 };
  88
  89 static void unlock_autospawn_lock_file(pa_context *c) {
  90     assert(c);
  91
  92     if (c->autospawn_lock_fd >= 0) {
  93         char lf[PATH_MAX];
  94         pa_runtime_path(AUTOSPAWN_LOCK, lf, sizeof(lf));
  95
  96         pa_unlock_lockfile(lf, c->autospawn_lock_fd);
  97         c->autospawn_lock_fd = -1;
  98     }
  99 }
 100
 101 pa_context *pa_context_new(pa_mainloop_api *mainloop, const char *name) {
 102     pa_context *c;
 103
 104     assert(mainloop);
 105     assert(name);
 106
 107     c = pa_xnew(pa_context, 1);
 108     c->ref = 1;
 109     c->name = pa_xstrdup(name);
 110     c->mainloop = mainloop;
 111     c->client = NULL;
 112     c->pstream = NULL;
 113     c->pdispatch = NULL;
 114     c->playback_streams = pa_dynarray_new();
 115     c->record_streams = pa_dynarray_new();
 116
 117     PA_LLIST_HEAD_INIT(pa_stream, c->streams);
 118     PA_LLIST_HEAD_INIT(pa_operation, c->operations);
 119
 120     c->error = PA_OK;
 121     c->state = PA_CONTEXT_UNCONNECTED;
 122     c->ctag = 0;
 123     c->csyncid = 0;
 124
 125     c->state_callback = NULL;
 126     c->state_userdata = NULL;
 127
 128     c->subscribe_callback = NULL;
 129     c->subscribe_userdata = NULL;
 130
 131     c->memblock_stat = pa_memblock_stat_new();
 132     c->local = -1;
 133     c->server_list = NULL;
 134     c->server = NULL;
 135     c->autospawn_lock_fd = -1;
 136     memset(&c->spawn_api, 0, sizeof(c->spawn_api));
 137     c->do_autospawn = 0;
 138
 139 #ifndef MSG_NOSIGNAL
 140 #ifdef SIGPIPE
 141     pa_check_signal_is_blocked(SIGPIPE);
 142 #endif
 143 #endif
 144
 145     c->conf = pa_client_conf_new();
 146     pa_client_conf_load(c->conf, NULL);
 147 #ifdef HAVE_X11
 148     pa_client_conf_from_x11(c->conf, NULL);
 149 #endif
 150     pa_client_conf_env(c->conf);
 151
 152     return c;
 153 }
 154
 155 static void context_free(pa_context *c) {
 156     assert(c);
 157
 158     unlock_autospawn_lock_file(c);
 159
 160     while (c->operations)
 161         pa_operation_cancel(c->operations);
 162
 163     while (c->streams)
 164         pa_stream_set_state(c->streams, PA_STREAM_TERMINATED);
 165
 166     if (c->client)
 167         pa_socket_client_unref(c->client);
 168     if (c->pdispatch)
 169         pa_pdispatch_unref(c->pdispatch);
 170     if (c->pstream) {
 171         pa_pstream_close(c->pstream);
 172         pa_pstream_unref(c->pstream);
 173     }
 174
 175     if (c->record_streams)
 176         pa_dynarray_free(c->record_streams, NULL, NULL);
 177     if (c->playback_streams)
 178         pa_dynarray_free(c->playback_streams, NULL, NULL);
 179
 180     pa_memblock_stat_unref(c->memblock_stat);
 181
 182     if (c->conf)
 183         pa_client_conf_free(c->conf);
 184
 185     pa_strlist_free(c->server_list);
 186
 187     pa_xfree(c->name);
 188     pa_xfree(c->server);
 189     pa_xfree(c);
 190 }
 191
 192 pa_context* pa_context_ref(pa_context *c) {
 193     assert(c);
 194     assert(c->ref >= 1);
 195
 196     c->ref++;
 197     return c;
 198 }
 199
 200 void pa_context_unref(pa_context *c) {
 201     assert(c);
 202     assert(c->ref >= 1);
 203
 204     if (--c->ref <= 0)
 205         context_free(c);
 206 }
 207
 208 void pa_context_set_state(pa_context *c, pa_context_state_t st) {
 209     assert(c);
 210     assert(c->ref >= 1);
 211
 212     if (c->state == st)
 213         return;
 214
 215     pa_context_ref(c);
 216
 217     c->state = st;
 218     if (c->state_callback)
 219         c->state_callback(c, c->state_userdata);
 220
 221     if (st == PA_CONTEXT_FAILED || st == PA_CONTEXT_TERMINATED) {
 222         pa_stream *s;
 223
 224         s = c->streams ? pa_stream_ref(c->streams) : NULL;
 225         while (s) {
 226             pa_stream *n = s->next ? pa_stream_ref(s->next) : NULL;
 227             pa_stream_set_state(s, st == PA_CONTEXT_FAILED ? PA_STREAM_FAILED : PA_STREAM_TERMINATED);
 228             pa_stream_unref(s);
 229             s = n;
 230         }
 231
 232         if (c->pdispatch)
 233             pa_pdispatch_unref(c->pdispatch);
 234         c->pdispatch = NULL;
 235
 236         if (c->pstream) {
 237             pa_pstream_close(c->pstream);
 238             pa_pstream_unref(c->pstream);
 239         }
 240         c->pstream = NULL;
 241
 242         if (c->client)
 243             pa_socket_client_unref(c->client);
 244         c->client = NULL;
 245     }
 246
 247     pa_context_unref(c);
 248 }
 249
 250 void pa_context_fail(pa_context *c, int error) {
 251     assert(c);
 252     assert(c->ref >= 1);
 253
 254     pa_context_set_error(c, error);
 255     pa_context_set_state(c, PA_CONTEXT_FAILED);
 256 }
 257
 258 int pa_context_set_error(pa_context *c, int error) {
 259     assert(error >= 0);
 260     assert(error < PA_ERR_MAX);
 261
 262     if (c)
 263         c->error = error;
 264
 265     return error;
 266 }
 267
 268 static void pstream_die_callback(pa_pstream *p, void *userdata) {
 269     pa_context *c = userdata;
 270
 271     assert(p);
 272     assert(c);
 273
 274     pa_context_fail(c, PA_ERR_CONNECTIONTERMINATED);
 275 }
 276
 277 static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, const pa_creds *creds, void *userdata) {
 278     pa_context *c = userdata;
 279
 280     assert(p);
 281     assert(packet);
 282     assert(c);
 283
 284     pa_context_ref(c);
 285
 286     if (pa_pdispatch_run(c->pdispatch, packet, creds, c) < 0)
 287         pa_context_fail(c, PA_ERR_PROTOCOL);
 288
 289     pa_context_unref(c);
 290 }
 291
 292 static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t offset, pa_seek_mode_t seek, const pa_memchunk *chunk, void *userdata) {
 293     pa_context *c = userdata;
 294     pa_stream *s;
 295
 296     assert(p);
 297     assert(chunk);
 298     assert(chunk->memblock);
 299     assert(chunk->length);
 300     assert(c);
 301     assert(c->ref >= 1);
 302
 303     pa_context_ref(c);
 304
 305     if ((s = pa_dynarray_get(c->record_streams, channel))) {
 306
 307         assert(seek == PA_SEEK_RELATIVE && offset == 0);
 308
 309         pa_memblockq_seek(s->record_memblockq, offset, seek);
 310         pa_memblockq_push_align(s->record_memblockq, chunk);
 311
 312         if (s->read_callback) {
 313             size_t l;
 314
 315             if ((l = pa_memblockq_get_length(s->record_memblockq)) > 0)
 316                 s->read_callback(s, l, s->read_userdata);
 317         }
 318     }
 319
 320     pa_context_unref(c);
 321 }
 322
 323 int pa_context_handle_error(pa_context *c, uint32_t command, pa_tagstruct *t) {
 324     assert(c);
 325     assert(c->ref >= 1);
 326
 327     if (command == PA_COMMAND_ERROR) {
 328         assert(t);
 329
 330         if (pa_tagstruct_getu32(t, &c->error) < 0) {
 331             pa_context_fail(c, PA_ERR_PROTOCOL);
 332             return -1;
 333
 334         }
 335     } else if (command == PA_COMMAND_TIMEOUT)
 336         c->error = PA_ERR_TIMEOUT;
 337     else {
 338         pa_context_fail(c, PA_ERR_PROTOCOL);
 339         return -1;
 340     }
 341
 342     return 0;
 343 }
 344
 345 static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
 346     pa_context *c = userdata;
 347
 348     assert(pd);
 349     assert(c);
 350     assert(c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME);
 351
 352     pa_context_ref(c);
 353
 354     if (command != PA_COMMAND_REPLY) {
 355
 356         if (pa_context_handle_error(c, command, t) < 0)
 357             pa_context_fail(c, PA_ERR_PROTOCOL);
 358
 359         pa_context_fail(c, c->error);
 360         goto finish;
 361     }
 362
 363     switch(c->state) {
 364         case PA_CONTEXT_AUTHORIZING: {
 365             pa_tagstruct *reply;
 366
 367             if (pa_tagstruct_getu32(t, &c->version) < 0 ||
 368                 !pa_tagstruct_eof(t)) {
 369                 pa_context_fail(c, PA_ERR_PROTOCOL);
 370                 goto finish;
 371             }
 372
 373             /* Minimum supported version */
 374             if (c->version < 8) {
 375                 pa_context_fail(c, PA_ERR_VERSION);
 376                 goto finish;
 377             }
 378
 379             reply = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag);
 380             pa_tagstruct_puts(reply, c->name);
 381             pa_pstream_send_tagstruct(c->pstream, reply);
 382             pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL);
 383
 384             pa_context_set_state(c, PA_CONTEXT_SETTING_NAME);
 385             break;
 386         }
 387
 388         case PA_CONTEXT_SETTING_NAME :
 389             pa_context_set_state(c, PA_CONTEXT_READY);
 390             break;
 391
 392         default:
 393             assert(0);
 394     }
 395
 396 finish:
 397     pa_context_unref(c);
 398 }
 399
 400 static void setup_context(pa_context *c, pa_iochannel *io) {
 401     pa_tagstruct *t;
 402     uint32_t tag;
 403
 404     assert(c);
 405     assert(io);
 406
 407     pa_context_ref(c);
 408
 409     assert(!c->pstream);
 410     c->pstream = pa_pstream_new(c->mainloop, io, c->memblock_stat);
 411
 412     pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
 413     pa_pstream_set_recieve_packet_callback(c->pstream, pstream_packet_callback, c);
 414     pa_pstream_set_recieve_memblock_callback(c->pstream, pstream_memblock_callback, c);
 415
 416     assert(!c->pdispatch);
 417     c->pdispatch = pa_pdispatch_new(c->mainloop, command_table, PA_COMMAND_MAX);
 418
 419     if (!c->conf->cookie_valid) {
 420         pa_context_fail(c, PA_ERR_AUTHKEY);
 421         goto finish;
 422     }
 423
 424     t = pa_tagstruct_command(c, PA_COMMAND_AUTH, &tag);
 425     pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION);
 426     pa_tagstruct_put_arbitrary(t, c->conf->cookie, sizeof(c->conf->cookie));
 427
 428 #ifdef HAVE_CREDS
 429 {
 430     pa_creds ucred;
 431
 432     ucred.uid = getuid();
 433     ucred.gid = getgid();
 434
 435     pa_pstream_send_tagstruct_with_creds(c->pstream, t, &ucred);
 436 }
 437 #else
 438     pa_pstream_send_tagstruct_with_creds(c->pstream, t, NULL);
 439 #endif
 440
 441     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL);
 442
 443     pa_context_set_state(c, PA_CONTEXT_AUTHORIZING);
 444
 445 finish:
 446
 447     pa_context_unref(c);
 448 }
 449
 450 static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata);
 451
 452 #ifndef OS_IS_WIN32
 453
 454 static int context_connect_spawn(pa_context *c) {
 455     pid_t pid;
 456     int status, r;
 457     int fds[2] = { -1, -1} ;
 458     pa_iochannel *io;
 459
 460     pa_context_ref(c);
 461
 462     if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
 463         pa_log(__FILE__": socketpair(): %s", pa_cstrerror(errno));
 464         pa_context_fail(c, PA_ERR_INTERNAL);
 465         goto fail;
 466     }
 467
 468     pa_fd_set_cloexec(fds[0], 1);
 469
 470     pa_socket_low_delay(fds[0]);
 471     pa_socket_low_delay(fds[1]);
 472
 473     if (c->spawn_api.prefork)
 474         c->spawn_api.prefork();
 475
 476     if ((pid = fork()) < 0) {
 477         pa_log(__FILE__": fork(): %s", pa_cstrerror(errno));
 478         pa_context_fail(c, PA_ERR_INTERNAL);
 479
 480         if (c->spawn_api.postfork)
 481             c->spawn_api.postfork();
 482
 483         goto fail;
 484     } else if (!pid) {
 485         /* Child */
 486
 487         char t[128];
 488         const char *state = NULL;
 489 #define MAX_ARGS 64
 490         const char * argv[MAX_ARGS+1];
 491         int n;
 492
 493         /* Not required, since fds[0] has CLOEXEC enabled anyway */
 494         close(fds[0]);
 495
 496         if (c->spawn_api.atfork)
 497             c->spawn_api.atfork();
 498
 499         /* Setup argv */
 500
 501         n = 0;
 502
 503         argv[n++] = c->conf->daemon_binary;
 504         argv[n++] = "--daemonize=yes";
 505
 506         snprintf(t, sizeof(t), "-Lmodule-native-protocol-fd fd=%i", fds[1]);
 507         argv[n++] = strdup(t);
 508
 509         while (n < MAX_ARGS) {
 510             char *a;
 511
 512             if (!(a = pa_split_spaces(c->conf->extra_arguments, &state)))
 513                 break;
 514
 515             argv[n++] = a;
 516         }
 517
 518         argv[n++] = NULL;
 519
 520         execv(argv[0], (char * const *) argv);
 521         _exit(1);
 522 #undef MAX_ARGS
 523     }
 524
 525     /* Parent */
 526
 527     r = waitpid(pid, &status, 0);
 528
 529     if (c->spawn_api.postfork)
 530         c->spawn_api.postfork();
 531
 532     if (r < 0) {
 533         pa_log(__FILE__": waitpid(): %s", pa_cstrerror(errno));
 534         pa_context_fail(c, PA_ERR_INTERNAL);
 535         goto fail;
 536     } else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
 537         pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 538         goto fail;
 539     }
 540
 541     close(fds[1]);
 542
 543     c->local = 1;
 544
 545     io = pa_iochannel_new(c->mainloop, fds[0], fds[0]);
 546
 547     setup_context(c, io);
 548     unlock_autospawn_lock_file(c);
 549
 550     pa_context_unref(c);
 551
 552     return 0;
 553
 554 fail:
 555     if (fds[0] != -1)
 556         close(fds[0]);
 557     if (fds[1] != -1)
 558         close(fds[1]);
 559
 560     unlock_autospawn_lock_file(c);
 561
 562     pa_context_unref(c);
 563
 564     return -1;
 565 }
 566
 567 #endif /* OS_IS_WIN32 */
 568
 569 static int try_next_connection(pa_context *c) {
 570     char *u = NULL;
 571     int r = -1;
 572
 573     assert(c);
 574     assert(!c->client);
 575
 576     for (;;) {
 577         pa_xfree(u);
 578         u = NULL;
 579
 580         c->server_list = pa_strlist_pop(c->server_list, &u);
 581
 582         if (!u) {
 583
 584 #ifndef OS_IS_WIN32
 585             if (c->do_autospawn) {
 586                 r = context_connect_spawn(c);
 587                 goto finish;
 588             }
 589 #endif
 590
 591             pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 592             goto finish;
 593         }
 594
 595         pa_log_debug(__FILE__": Trying to connect to %s...", u);
 596
 597         pa_xfree(c->server);
 598         c->server = pa_xstrdup(u);
 599
 600         if (!(c->client = pa_socket_client_new_string(c->mainloop, u, PA_NATIVE_DEFAULT_PORT)))
 601             continue;
 602
 603         c->local = pa_socket_client_is_local(c->client);
 604         pa_socket_client_set_callback(c->client, on_connection, c);
 605         break;
 606     }
 607
 608     r = 0;
 609
 610 finish:
 611     pa_xfree(u);
 612
 613     return r;
 614 }
 615
 616 static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata) {
 617     pa_context *c = userdata;
 618
 619     assert(client);
 620     assert(c);
 621     assert(c->state == PA_CONTEXT_CONNECTING);
 622
 623     pa_context_ref(c);
 624
 625     pa_socket_client_unref(client);
 626     c->client = NULL;
 627
 628     if (!io) {
 629         /* Try the item in the list */
 630         if (errno == ECONNREFUSED || errno == ETIMEDOUT || errno == EHOSTUNREACH) {
 631             try_next_connection(c);
 632             goto finish;
 633         }
 634
 635         pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 636         goto finish;
 637     }
 638
 639     unlock_autospawn_lock_file(c);
 640     setup_context(c, io);
 641
 642 finish:
 643     pa_context_unref(c);
 644 }
 645
 646 int pa_context_connect(
 647         pa_context *c,
 648         const char *server,
 649         pa_context_flags_t flags,
 650         const pa_spawn_api *api) {
 651
 652     int r = -1;
 653
 654     assert(c);
 655     assert(c->ref >= 1);
 656
 657     PA_CHECK_VALIDITY(c, c->state == PA_CONTEXT_UNCONNECTED, PA_ERR_BADSTATE);
 658     PA_CHECK_VALIDITY(c, !(flags & ~PA_CONTEXT_NOAUTOSPAWN), PA_ERR_INVALID);
 659     PA_CHECK_VALIDITY(c, !server || *server, PA_ERR_INVALID);
 660
 661     if (!server)
 662         server = c->conf->default_server;
 663
 664     pa_context_ref(c);
 665
 666     assert(!c->server_list);
 667
 668     if (server) {
 669         if (!(c->server_list = pa_strlist_parse(server))) {
 670             pa_context_fail(c, PA_ERR_INVALIDSERVER);
 671             goto finish;
 672         }
 673     } else {
 674         char *d;
 675         char ufn[PATH_MAX];
 676
 677         /* Prepend in reverse order */
 678
 679         if ((d = getenv("DISPLAY"))) {
 680             char *e;
 681             d = pa_xstrdup(d);
 682             if ((e = strchr(d, ':')))
 683                 *e = 0;
 684
 685             if (*d)
 686                 c->server_list = pa_strlist_prepend(c->server_list, d);
 687
 688             pa_xfree(d);
 689         }
 690
 691         c->server_list = pa_strlist_prepend(c->server_list, "tcp6:localhost");
 692         c->server_list = pa_strlist_prepend(c->server_list, "tcp4:localhost");
 693
 694         /* The system wide instance */
 695         c->server_list = pa_strlist_prepend(c->server_list, PA_SYSTEM_RUNTIME_PATH "/" PA_NATIVE_DEFAULT_UNIX_SOCKET);
 696
 697         /* The per-user instance */
 698         c->server_list = pa_strlist_prepend(c->server_list, pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET, ufn, sizeof(ufn)));
 699
 700         /* Wrap the connection attempts in a single transaction for sane autospawn locking */
 701         if (!(flags & PA_CONTEXT_NOAUTOSPAWN) && c->conf->autospawn) {
 702             char lf[PATH_MAX];
 703
 704             pa_runtime_path(AUTOSPAWN_LOCK, lf, sizeof(lf));
 705             pa_make_secure_parent_dir(lf, 0700, (uid_t)-1, (gid_t)-1);
 706             assert(c->autospawn_lock_fd <= 0);
 707             c->autospawn_lock_fd = pa_lock_lockfile(lf);
 708
 709             if (api)
 710                 c->spawn_api = *api;
 711             c->do_autospawn = 1;
 712         }
 713
 714     }
 715
 716     pa_context_set_state(c, PA_CONTEXT_CONNECTING);
 717     r = try_next_connection(c);
 718
 719 finish:
 720     pa_context_unref(c);
 721
 722     return r;
 723 }
 724
 725 void pa_context_disconnect(pa_context *c) {
 726     assert(c);
 727     assert(c->ref >= 1);
 728
 729     pa_context_set_state(c, PA_CONTEXT_TERMINATED);
 730 }
 731
 732 pa_context_state_t pa_context_get_state(pa_context *c) {
 733     assert(c);
 734     assert(c->ref >= 1);
 735
 736     return c->state;
 737 }
 738
 739 int pa_context_errno(pa_context *c) {
 740     assert(c);
 741     assert(c->ref >= 1);
 742
 743     return c->error;
 744 }
 745
 746 void pa_context_set_state_callback(pa_context *c, pa_context_notify_cb_t cb, void *userdata) {
 747     assert(c);
 748     assert(c->ref >= 1);
 749
 750     c->state_callback = cb;
 751     c->state_userdata = userdata;
 752 }
 753
 754 int pa_context_is_pending(pa_context *c) {
 755     assert(c);
 756     assert(c->ref >= 1);
 757
 758     PA_CHECK_VALIDITY(c,
 759                       c->state == PA_CONTEXT_CONNECTING ||
 760                       c->state == PA_CONTEXT_AUTHORIZING ||
 761                       c->state == PA_CONTEXT_SETTING_NAME ||
 762                       c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 763
 764     return (c->pstream && pa_pstream_is_pending(c->pstream)) ||
 765         (c->pdispatch && pa_pdispatch_is_pending(c->pdispatch)) ||
 766         c->client;
 767 }
 768
 769 static void set_dispatch_callbacks(pa_operation *o);
 770
 771 static void pdispatch_drain_callback(PA_GCC_UNUSED pa_pdispatch*pd, void *userdata) {
 772     set_dispatch_callbacks(userdata);
 773 }
 774
 775 static void pstream_drain_callback(PA_GCC_UNUSED pa_pstream *s, void *userdata) {
 776     set_dispatch_callbacks(userdata);
 777 }
 778
 779 static void set_dispatch_callbacks(pa_operation *o) {
 780     int done = 1;
 781
 782     assert(o);
 783     assert(o->ref >= 1);
 784     assert(o->context);
 785     assert(o->context->ref >= 1);
 786     assert(o->context->state == PA_CONTEXT_READY);
 787
 788     pa_pstream_set_drain_callback(o->context->pstream, NULL, NULL);
 789     pa_pdispatch_set_drain_callback(o->context->pdispatch, NULL, NULL);
 790
 791     if (pa_pdispatch_is_pending(o->context->pdispatch)) {
 792         pa_pdispatch_set_drain_callback(o->context->pdispatch, pdispatch_drain_callback, o);
 793         done = 0;
 794     }
 795
 796     if (pa_pstream_is_pending(o->context->pstream)) {
 797         pa_pstream_set_drain_callback(o->context->pstream, pstream_drain_callback, o);
 798         done = 0;
 799     }
 800
 801     if (done) {
 802         if (o->callback) {
 803             pa_context_notify_cb_t cb = (pa_context_notify_cb_t) o->callback;
 804             cb(o->context, o->userdata);
 805         }
 806
 807         pa_operation_done(o);
 808         pa_operation_unref(o);
 809     }
 810 }
 811
 812 pa_operation* pa_context_drain(pa_context *c, pa_context_notify_cb_t cb, void *userdata) {
 813     pa_operation *o;
 814
 815     assert(c);
 816     assert(c->ref >= 1);
 817
 818     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 819     PA_CHECK_VALIDITY_RETURN_NULL(c, pa_context_is_pending(c), PA_ERR_BADSTATE);
 820
 821     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 822     set_dispatch_callbacks(pa_operation_ref(o));
 823
 824     return o;
 825 }
 826
 827 void pa_context_simple_ack_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 828     pa_operation *o = userdata;
 829     int success = 1;
 830
 831     assert(pd);
 832     assert(o);
 833     assert(o->ref >= 1);
 834
 835     if (!o->context)
 836         goto finish;
 837
 838     if (command != PA_COMMAND_REPLY) {
 839         if (pa_context_handle_error(o->context, command, t) < 0)
 840             goto finish;
 841
 842         success = 0;
 843     } else if (!pa_tagstruct_eof(t)) {
 844         pa_context_fail(o->context, PA_ERR_PROTOCOL);
 845         goto finish;
 846     }
 847
 848     if (o->callback) {
 849         pa_context_success_cb_t cb = (pa_context_success_cb_t) o->callback;
 850         cb(o->context, success, o->userdata);
 851     }
 852
 853 finish:
 854     pa_operation_done(o);
 855     pa_operation_unref(o);
 856 }
 857
 858 pa_operation* pa_context_exit_daemon(pa_context *c, pa_context_success_cb_t cb, void *userdata) {
 859     pa_tagstruct *t;
 860     pa_operation *o;
 861     uint32_t tag;
 862
 863     assert(c);
 864     assert(c->ref >= 1);
 865
 866     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 867
 868     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 869
 870     t = pa_tagstruct_command(c, PA_COMMAND_EXIT, &tag);
 871     pa_pstream_send_tagstruct(c->pstream, t);
 872     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 873
 874     return o;
 875 }
 876
 877 pa_operation* pa_context_send_simple_command(pa_context *c, uint32_t command, pa_pdispatch_cb_t internal_cb, pa_operation_cb_t cb, void *userdata) {
 878     pa_tagstruct *t;
 879     pa_operation *o;
 880     uint32_t tag;
 881
 882     assert(c);
 883     assert(c->ref >= 1);
 884
 885     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 886
 887     o = pa_operation_new(c, NULL, cb, userdata);
 888
 889     t = pa_tagstruct_command(c, command, &tag);
 890     pa_pstream_send_tagstruct(c->pstream, t);
 891     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, internal_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 892
 893     return o;
 894 }
 895
 896 pa_operation* pa_context_set_default_sink(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 897     pa_tagstruct *t;
 898     pa_operation *o;
 899     uint32_t tag;
 900
 901     assert(c);
 902     assert(c->ref >= 1);
 903
 904     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 905
 906     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 907
 908     t = pa_tagstruct_command(c, PA_COMMAND_SET_DEFAULT_SINK, &tag);
 909     pa_tagstruct_puts(t, name);
 910     pa_pstream_send_tagstruct(c->pstream, t);
 911     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 912
 913     return o;
 914 }
 915
 916 pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 917     pa_tagstruct *t;
 918     pa_operation *o;
 919     uint32_t tag;
 920
 921     assert(c);
 922     assert(c->ref >= 1);
 923
 924     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 925
 926     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 927
 928     t = pa_tagstruct_command(c, PA_COMMAND_SET_DEFAULT_SOURCE, &tag);
 929     pa_tagstruct_puts(t, name);
 930     pa_pstream_send_tagstruct(c->pstream, t);
 931     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 932
 933     return o;
 934 }
 935
 936 int pa_context_is_local(pa_context *c) {
 937     assert(c);
 938
 939     return c->local;
 940 }
 941
 942 pa_operation* pa_context_set_name(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 943     pa_tagstruct *t;
 944     pa_operation *o;
 945     uint32_t tag;
 946
 947     assert(c);
 948     assert(c->ref >= 1);
 949     assert(name);
 950
 951     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 952
 953     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 954
 955     t = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag);
 956     pa_tagstruct_puts(t, name);
 957     pa_pstream_send_tagstruct(c->pstream, t);
 958     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 959
 960     return o;
 961 }
 962
 963 const char* pa_get_library_version(void) {
 964     return PACKAGE_VERSION;
 965 }
 966
 967 const char* pa_context_get_server(pa_context *c) {
 968     assert(c);
 969     assert(c->ref >= 1);
 970
 971     if (!c->server)
 972         return NULL;
 973
 974     if (*c->server == '{') {
 975         char *e = strchr(c->server+1, '}');
 976         return e ? e+1 : c->server;
 977     }
 978
 979     return c->server;
 980 }
 981
 982 uint32_t pa_context_get_protocol_version(PA_GCC_UNUSED pa_context *c) {
 983     return PA_PROTOCOL_VERSION;
 984 }
 985
 986 uint32_t pa_context_get_server_protocol_version(pa_context *c) {
 987     assert(c);
 988     assert(c->ref >= 1);
 989
 990     return c->version;
 991 }
 992
 993 pa_tagstruct *pa_tagstruct_command(pa_context *c, uint32_t command, uint32_t *tag) {
 994     pa_tagstruct *t;
 995
 996     assert(c);
 997     assert(tag);
 998
 999     t = pa_tagstruct_new(NULL, 0);
1000     pa_tagstruct_putu32(t, command);
1001     pa_tagstruct_putu32(t, *tag = c->ctag++);
1002
1003     return t;
1004 }