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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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_NETDB_H
  45 #include <netdb.h>
  46 #endif
  47
  48 #include "../polypcore/winsock.h"
  49
  50 #include <polyp/version.h>
  51
  52 #include <polypcore/native-common.h>
  53 #include <polypcore/pdispatch.h>
  54 #include <polypcore/pstream.h>
  55 #include <polypcore/dynarray.h>
  56 #include <polypcore/socket-client.h>
  57 #include <polypcore/pstream-util.h>
  58 #include <polypcore/util.h>
  59 #include <polypcore/xmalloc.h>
  60 #include <polypcore/log.h>
  61 #include <polypcore/socket-util.h>
  62
  63 #include "internal.h"
  64
  65 #include "client-conf.h"
  66
  67 #ifdef HAVE_X11
  68 #include "client-conf-x11.h"
  69 #endif
  70
  71 #include "context.h"
  72
  73 #define AUTOSPAWN_LOCK "autospawn.lock"
  74
  75 static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = {
  76     [PA_COMMAND_REQUEST] = pa_command_request,
  77     [PA_COMMAND_OVERFLOW] = pa_command_overflow_or_underflow,
  78     [PA_COMMAND_UNDERFLOW] = pa_command_overflow_or_underflow,
  79     [PA_COMMAND_PLAYBACK_STREAM_KILLED] = pa_command_stream_killed,
  80     [PA_COMMAND_RECORD_STREAM_KILLED] = pa_command_stream_killed,
  81     [PA_COMMAND_SUBSCRIBE_EVENT] = pa_command_subscribe_event
  82 };
  83
  84 static void unlock_autospawn_lock_file(pa_context *c) {
  85     assert(c);
  86
  87     if (c->autospawn_lock_fd >= 0) {
  88         char lf[PATH_MAX];
  89         pa_runtime_path(AUTOSPAWN_LOCK, lf, sizeof(lf));
  90
  91         pa_unlock_lockfile(lf, c->autospawn_lock_fd);
  92         c->autospawn_lock_fd = -1;
  93     }
  94 }
  95
  96 pa_context *pa_context_new(pa_mainloop_api *mainloop, const char *name) {
  97     pa_context *c;
  98
  99     assert(mainloop);
 100     assert(name);
 101
 102     c = pa_xnew(pa_context, 1);
 103     c->ref = 1;
 104     c->name = pa_xstrdup(name);
 105     c->mainloop = mainloop;
 106     c->client = NULL;
 107     c->pstream = NULL;
 108     c->pdispatch = NULL;
 109     c->playback_streams = pa_dynarray_new();
 110     c->record_streams = pa_dynarray_new();
 111
 112     PA_LLIST_HEAD_INIT(pa_stream, c->streams);
 113     PA_LLIST_HEAD_INIT(pa_operation, c->operations);
 114
 115     c->error = PA_OK;
 116     c->state = PA_CONTEXT_UNCONNECTED;
 117     c->ctag = 0;
 118     c->csyncid = 0;
 119
 120     c->state_callback = NULL;
 121     c->state_userdata = NULL;
 122
 123     c->subscribe_callback = NULL;
 124     c->subscribe_userdata = NULL;
 125
 126     c->memblock_stat = pa_memblock_stat_new();
 127     c->local = -1;
 128     c->server_list = NULL;
 129     c->server = NULL;
 130     c->autospawn_lock_fd = -1;
 131     memset(&c->spawn_api, 0, sizeof(c->spawn_api));
 132     c->do_autospawn = 0;
 133
 134 #ifdef SIGPIPE
 135     pa_check_signal_is_blocked(SIGPIPE);
 136 #endif
 137
 138     c->conf = pa_client_conf_new();
 139     pa_client_conf_load(c->conf, NULL);
 140 #ifdef HAVE_X11
 141     pa_client_conf_from_x11(c->conf, NULL);
 142 #endif
 143     pa_client_conf_env(c->conf);
 144
 145     return c;
 146 }
 147
 148 static void context_free(pa_context *c) {
 149     assert(c);
 150
 151     unlock_autospawn_lock_file(c);
 152
 153     while (c->operations)
 154         pa_operation_cancel(c->operations);
 155
 156     while (c->streams)
 157         pa_stream_set_state(c->streams, PA_STREAM_TERMINATED);
 158
 159     if (c->client)
 160         pa_socket_client_unref(c->client);
 161     if (c->pdispatch)
 162         pa_pdispatch_unref(c->pdispatch);
 163     if (c->pstream) {
 164         pa_pstream_close(c->pstream);
 165         pa_pstream_unref(c->pstream);
 166     }
 167
 168     if (c->record_streams)
 169         pa_dynarray_free(c->record_streams, NULL, NULL);
 170     if (c->playback_streams)
 171         pa_dynarray_free(c->playback_streams, NULL, NULL);
 172
 173     pa_memblock_stat_unref(c->memblock_stat);
 174
 175     if (c->conf)
 176         pa_client_conf_free(c->conf);
 177
 178     pa_strlist_free(c->server_list);
 179
 180     pa_xfree(c->name);
 181     pa_xfree(c->server);
 182     pa_xfree(c);
 183 }
 184
 185 pa_context* pa_context_ref(pa_context *c) {
 186     assert(c);
 187     assert(c->ref >= 1);
 188
 189     c->ref++;
 190     return c;
 191 }
 192
 193 void pa_context_unref(pa_context *c) {
 194     assert(c);
 195     assert(c->ref >= 1);
 196
 197     if (--c->ref <= 0)
 198         context_free(c);
 199 }
 200
 201 void pa_context_set_state(pa_context *c, pa_context_state_t st) {
 202     assert(c);
 203     assert(c->ref >= 1);
 204
 205     if (c->state == st)
 206         return;
 207
 208     pa_context_ref(c);
 209
 210     if (st == PA_CONTEXT_FAILED || st == PA_CONTEXT_TERMINATED) {
 211         pa_stream *s;
 212
 213         s = c->streams ? pa_stream_ref(c->streams) : NULL;
 214         while (s) {
 215             pa_stream *n = s->next ? pa_stream_ref(s->next) : NULL;
 216             pa_stream_set_state(s, st == PA_CONTEXT_FAILED ? PA_STREAM_FAILED : PA_STREAM_TERMINATED);
 217             pa_stream_unref(s);
 218             s = n;
 219         }
 220
 221         if (c->pdispatch)
 222             pa_pdispatch_unref(c->pdispatch);
 223         c->pdispatch = NULL;
 224
 225         if (c->pstream) {
 226             pa_pstream_close(c->pstream);
 227             pa_pstream_unref(c->pstream);
 228         }
 229         c->pstream = NULL;
 230
 231         if (c->client)
 232             pa_socket_client_unref(c->client);
 233         c->client = NULL;
 234     }
 235
 236     c->state = st;
 237     if (c->state_callback)
 238         c->state_callback(c, c->state_userdata);
 239
 240     pa_context_unref(c);
 241 }
 242
 243 void pa_context_fail(pa_context *c, int error) {
 244     assert(c);
 245     assert(c->ref >= 1);
 246
 247     pa_context_set_error(c, error);
 248     pa_context_set_state(c, PA_CONTEXT_FAILED);
 249 }
 250
 251 int pa_context_set_error(pa_context *c, int error) {
 252     assert(error >= 0);
 253     assert(error < PA_ERR_MAX);
 254
 255     if (c)
 256         c->error = error;
 257
 258     return error;
 259 }
 260
 261 static void pstream_die_callback(pa_pstream *p, void *userdata) {
 262     pa_context *c = userdata;
 263
 264     assert(p);
 265     assert(c);
 266
 267     pa_context_fail(c, PA_ERR_CONNECTIONTERMINATED);
 268 }
 269
 270 static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, void *userdata) {
 271     pa_context *c = userdata;
 272
 273     assert(p);
 274     assert(packet);
 275     assert(c);
 276
 277     pa_context_ref(c);
 278
 279     if (pa_pdispatch_run(c->pdispatch, packet, c) < 0)
 280         pa_context_fail(c, PA_ERR_PROTOCOL);
 281
 282     pa_context_unref(c);
 283 }
 284
 285 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) {
 286     pa_context *c = userdata;
 287     pa_stream *s;
 288
 289     assert(p);
 290     assert(chunk);
 291     assert(chunk->memblock);
 292     assert(chunk->length);
 293     assert(c);
 294     assert(c->ref >= 1);
 295
 296     pa_context_ref(c);
 297
 298     if ((s = pa_dynarray_get(c->record_streams, channel))) {
 299
 300         pa_memblockq_seek(s->record_memblockq, offset, seek);
 301         pa_memblockq_push_align(s->record_memblockq, chunk);
 302
 303         if (s->read_callback) {
 304             size_t l;
 305
 306             if ((l = pa_memblockq_get_length(s->record_memblockq)) > 0)
 307                 s->read_callback(s, l, s->read_userdata);
 308         }
 309     }
 310
 311     pa_context_unref(c);
 312 }
 313
 314 int pa_context_handle_error(pa_context *c, uint32_t command, pa_tagstruct *t) {
 315     assert(c);
 316     assert(c->ref >= 1);
 317
 318     if (command == PA_COMMAND_ERROR) {
 319         assert(t);
 320
 321         if (pa_tagstruct_getu32(t, &c->error) < 0) {
 322             pa_context_fail(c, PA_ERR_PROTOCOL);
 323             return -1;
 324
 325         }
 326     } else if (command == PA_COMMAND_TIMEOUT)
 327         c->error = PA_ERR_TIMEOUT;
 328     else {
 329         pa_context_fail(c, PA_ERR_PROTOCOL);
 330         return -1;
 331     }
 332
 333     return 0;
 334 }
 335
 336 static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
 337     pa_context *c = userdata;
 338
 339     assert(pd);
 340     assert(c);
 341     assert(c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME);
 342
 343     pa_context_ref(c);
 344
 345     if (command != PA_COMMAND_REPLY) {
 346
 347         if (pa_context_handle_error(c, command, t) < 0)
 348             pa_context_fail(c, PA_ERR_PROTOCOL);
 349
 350         pa_context_fail(c, c->error);
 351         goto finish;
 352     }
 353
 354     switch(c->state) {
 355         case PA_CONTEXT_AUTHORIZING: {
 356             pa_tagstruct *reply;
 357             reply = pa_tagstruct_new(NULL, 0);
 358             pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME);
 359             pa_tagstruct_putu32(reply, tag = c->ctag++);
 360             pa_tagstruct_puts(reply, c->name);
 361             pa_pstream_send_tagstruct(c->pstream, reply);
 362             pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
 363
 364             pa_context_set_state(c, PA_CONTEXT_SETTING_NAME);
 365             break;
 366         }
 367
 368         case PA_CONTEXT_SETTING_NAME :
 369             pa_context_set_state(c, PA_CONTEXT_READY);
 370             break;
 371
 372         default:
 373             assert(0);
 374     }
 375
 376 finish:
 377     pa_context_unref(c);
 378 }
 379
 380 static void setup_context(pa_context *c, pa_iochannel *io) {
 381     pa_tagstruct *t;
 382     uint32_t tag;
 383
 384     assert(c);
 385     assert(io);
 386
 387     pa_context_ref(c);
 388
 389     assert(!c->pstream);
 390     c->pstream = pa_pstream_new(c->mainloop, io, c->memblock_stat);
 391
 392     pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
 393     pa_pstream_set_recieve_packet_callback(c->pstream, pstream_packet_callback, c);
 394     pa_pstream_set_recieve_memblock_callback(c->pstream, pstream_memblock_callback, c);
 395
 396     assert(!c->pdispatch);
 397     c->pdispatch = pa_pdispatch_new(c->mainloop, command_table, PA_COMMAND_MAX);
 398
 399     if (!c->conf->cookie_valid) {
 400         pa_context_fail(c, PA_ERR_AUTHKEY);
 401         goto finish;
 402     }
 403
 404     t = pa_tagstruct_new(NULL, 0);
 405     pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
 406     pa_tagstruct_putu32(t, tag = c->ctag++);
 407     pa_tagstruct_put_arbitrary(t, c->conf->cookie, sizeof(c->conf->cookie));
 408     pa_pstream_send_tagstruct(c->pstream, t);
 409     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
 410
 411     pa_context_set_state(c, PA_CONTEXT_AUTHORIZING);
 412
 413 finish:
 414
 415     pa_context_unref(c);
 416 }
 417
 418 static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata);
 419
 420 #ifndef OS_IS_WIN32
 421
 422 static int context_connect_spawn(pa_context *c) {
 423     pid_t pid;
 424     int status, r;
 425     int fds[2] = { -1, -1} ;
 426     pa_iochannel *io;
 427
 428     pa_context_ref(c);
 429
 430     if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
 431         pa_log(__FILE__": socketpair() failed: %s\n", strerror(errno));
 432         pa_context_fail(c, PA_ERR_INTERNAL);
 433         goto fail;
 434     }
 435
 436     pa_fd_set_cloexec(fds[0], 1);
 437
 438     pa_socket_low_delay(fds[0]);
 439     pa_socket_low_delay(fds[1]);
 440
 441     if (c->spawn_api.prefork)
 442         c->spawn_api.prefork();
 443
 444     if ((pid = fork()) < 0) {
 445         pa_log(__FILE__": fork() failed: %s\n", strerror(errno));
 446         pa_context_fail(c, PA_ERR_INTERNAL);
 447
 448         if (c->spawn_api.postfork)
 449             c->spawn_api.postfork();
 450
 451         goto fail;
 452     } else if (!pid) {
 453         /* Child */
 454
 455         char t[128];
 456         const char *state = NULL;
 457 #define MAX_ARGS 64
 458         const char * argv[MAX_ARGS+1];
 459         int n;
 460
 461         /* Not required, since fds[0] has CLOEXEC enabled anyway */
 462         close(fds[0]);
 463
 464         if (c->spawn_api.atfork)
 465             c->spawn_api.atfork();
 466
 467         /* Setup argv */
 468
 469         n = 0;
 470
 471         argv[n++] = c->conf->daemon_binary;
 472         argv[n++] = "--daemonize=yes";
 473
 474         snprintf(t, sizeof(t), "-Lmodule-native-protocol-fd fd=%i", fds[1]);
 475         argv[n++] = strdup(t);
 476
 477         while (n < MAX_ARGS) {
 478             char *a;
 479
 480             if (!(a = pa_split_spaces(c->conf->extra_arguments, &state)))
 481                 break;
 482
 483             argv[n++] = a;
 484         }
 485
 486         argv[n++] = NULL;
 487
 488         execv(argv[0], (char * const *) argv);
 489         _exit(1);
 490 #undef MAX_ARGS
 491     }
 492
 493     /* Parent */
 494
 495     r = waitpid(pid, &status, 0);
 496
 497     if (c->spawn_api.postfork)
 498         c->spawn_api.postfork();
 499
 500     if (r < 0) {
 501         pa_log(__FILE__": waitpid() failed: %s\n", strerror(errno));
 502         pa_context_fail(c, PA_ERR_INTERNAL);
 503         goto fail;
 504     } else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
 505         pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 506         goto fail;
 507     }
 508
 509     close(fds[1]);
 510
 511     c->local = 1;
 512
 513     io = pa_iochannel_new(c->mainloop, fds[0], fds[0]);
 514
 515     setup_context(c, io);
 516     unlock_autospawn_lock_file(c);
 517
 518     pa_context_unref(c);
 519
 520     return 0;
 521
 522 fail:
 523     if (fds[0] != -1)
 524         close(fds[0]);
 525     if (fds[1] != -1)
 526         close(fds[1]);
 527
 528     unlock_autospawn_lock_file(c);
 529
 530     pa_context_unref(c);
 531
 532     return -1;
 533 }
 534
 535 #endif /* OS_IS_WIN32 */
 536
 537 static int try_next_connection(pa_context *c) {
 538     char *u = NULL;
 539     int r = -1;
 540
 541     assert(c);
 542     assert(!c->client);
 543
 544     for (;;) {
 545         pa_xfree(u);
 546         u = NULL;
 547
 548         c->server_list = pa_strlist_pop(c->server_list, &u);
 549
 550         if (!u) {
 551
 552 #ifndef OS_IS_WIN32
 553             if (c->do_autospawn) {
 554                 r = context_connect_spawn(c);
 555                 goto finish;
 556             }
 557 #endif
 558
 559             pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 560             goto finish;
 561         }
 562
 563         pa_log_debug(__FILE__": Trying to connect to %s...\n", u);
 564
 565         pa_xfree(c->server);
 566         c->server = pa_xstrdup(u);
 567
 568         if (!(c->client = pa_socket_client_new_string(c->mainloop, u, PA_NATIVE_DEFAULT_PORT)))
 569             continue;
 570
 571         c->local = pa_socket_client_is_local(c->client);
 572         pa_socket_client_set_callback(c->client, on_connection, c);
 573         break;
 574     }
 575
 576     r = 0;
 577
 578 finish:
 579     pa_xfree(u);
 580
 581     return r;
 582 }
 583
 584 static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata) {
 585     pa_context *c = userdata;
 586
 587     assert(client);
 588     assert(c);
 589     assert(c->state == PA_CONTEXT_CONNECTING);
 590
 591     pa_context_ref(c);
 592
 593     pa_socket_client_unref(client);
 594     c->client = NULL;
 595
 596     if (!io) {
 597         /* Try the item in the list */
 598         if (errno == ECONNREFUSED || errno == ETIMEDOUT || errno == EHOSTUNREACH) {
 599             try_next_connection(c);
 600             goto finish;
 601         }
 602
 603         pa_context_fail(c, PA_ERR_CONNECTIONREFUSED);
 604         goto finish;
 605     }
 606
 607     unlock_autospawn_lock_file(c);
 608     setup_context(c, io);
 609
 610 finish:
 611     pa_context_unref(c);
 612 }
 613
 614 int pa_context_connect(
 615         pa_context *c,
 616         const char *server,
 617         pa_context_flags_t flags,
 618         const pa_spawn_api *api) {
 619
 620     int r = -1;
 621
 622     assert(c);
 623     assert(c->ref >= 1);
 624
 625     PA_CHECK_VALIDITY(c, c->state == PA_CONTEXT_UNCONNECTED, PA_ERR_BADSTATE);
 626     PA_CHECK_VALIDITY(c, !(flags & ~PA_CONTEXT_NOAUTOSPAWN), PA_ERR_INVALID);
 627     PA_CHECK_VALIDITY(c, !server || *server, PA_ERR_INVALID);
 628
 629     if (!server)
 630         server = c->conf->default_server;
 631
 632     pa_context_ref(c);
 633
 634     assert(!c->server_list);
 635
 636     if (server) {
 637         if (!(c->server_list = pa_strlist_parse(server))) {
 638             pa_context_fail(c, PA_ERR_INVALIDSERVER);
 639             goto finish;
 640         }
 641     } else {
 642         char *d;
 643         char ufn[PATH_MAX];
 644
 645         /* Prepend in reverse order */
 646
 647         if ((d = getenv("DISPLAY"))) {
 648             char *e;
 649             d = pa_xstrdup(d);
 650             if ((e = strchr(d, ':')))
 651                 *e = 0;
 652
 653             if (*d)
 654                 c->server_list = pa_strlist_prepend(c->server_list, d);
 655
 656             pa_xfree(d);
 657         }
 658
 659         c->server_list = pa_strlist_prepend(c->server_list, "tcp6:localhost");
 660         c->server_list = pa_strlist_prepend(c->server_list, "localhost");
 661         c->server_list = pa_strlist_prepend(c->server_list, pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET, ufn, sizeof(ufn)));
 662
 663         /* Wrap the connection attempts in a single transaction for sane autospawn locking */
 664         if (!(flags & PA_CONTEXT_NOAUTOSPAWN) && c->conf->autospawn) {
 665             char lf[PATH_MAX];
 666
 667             pa_runtime_path(AUTOSPAWN_LOCK, lf, sizeof(lf));
 668             pa_make_secure_parent_dir(lf);
 669             assert(c->autospawn_lock_fd <= 0);
 670             c->autospawn_lock_fd = pa_lock_lockfile(lf);
 671
 672             if (api)
 673                 c->spawn_api = *api;
 674             c->do_autospawn = 1;
 675         }
 676
 677     }
 678
 679     pa_context_set_state(c, PA_CONTEXT_CONNECTING);
 680     r = try_next_connection(c);
 681
 682 finish:
 683     pa_context_unref(c);
 684
 685     return r;
 686 }
 687
 688 void pa_context_disconnect(pa_context *c) {
 689     assert(c);
 690     assert(c->ref >= 1);
 691
 692     pa_context_set_state(c, PA_CONTEXT_TERMINATED);
 693 }
 694
 695 pa_context_state_t pa_context_get_state(pa_context *c) {
 696     assert(c);
 697     assert(c->ref >= 1);
 698
 699     return c->state;
 700 }
 701
 702 int pa_context_errno(pa_context *c) {
 703     assert(c);
 704     assert(c->ref >= 1);
 705
 706     return c->error;
 707 }
 708
 709 void pa_context_set_state_callback(pa_context *c, pa_context_notify_cb_t cb, void *userdata) {
 710     assert(c);
 711     assert(c->ref >= 1);
 712
 713     c->state_callback = cb;
 714     c->state_userdata = userdata;
 715 }
 716
 717 int pa_context_is_pending(pa_context *c) {
 718     assert(c);
 719     assert(c->ref >= 1);
 720
 721 /*     pa_log("pstream: %i\n", pa_pstream_is_pending(c->pstream)); */
 722 /*     pa_log("pdispatch: %i\n", pa_pdispatch_is_pending(c->pdispatch)); */
 723
 724     return (c->pstream && pa_pstream_is_pending(c->pstream)) ||
 725         (c->pdispatch && pa_pdispatch_is_pending(c->pdispatch)) ||
 726         c->client;
 727 }
 728
 729 static void set_dispatch_callbacks(pa_operation *o);
 730
 731 static void pdispatch_drain_callback(PA_GCC_UNUSED pa_pdispatch*pd, void *userdata) {
 732     set_dispatch_callbacks(userdata);
 733 }
 734
 735 static void pstream_drain_callback(PA_GCC_UNUSED pa_pstream *s, void *userdata) {
 736     set_dispatch_callbacks(userdata);
 737 }
 738
 739 static void set_dispatch_callbacks(pa_operation *o) {
 740     int done = 1;
 741
 742     assert(o);
 743     assert(o->ref >= 1);
 744     assert(o->context);
 745     assert(o->context->ref >= 1);
 746     assert(o->context->state == PA_CONTEXT_READY);
 747
 748     pa_pstream_set_drain_callback(o->context->pstream, NULL, NULL);
 749     pa_pdispatch_set_drain_callback(o->context->pdispatch, NULL, NULL);
 750
 751     if (pa_pdispatch_is_pending(o->context->pdispatch)) {
 752         pa_pdispatch_set_drain_callback(o->context->pdispatch, pdispatch_drain_callback, o);
 753         done = 0;
 754     }
 755
 756     if (pa_pstream_is_pending(o->context->pstream)) {
 757         pa_pstream_set_drain_callback(o->context->pstream, pstream_drain_callback, o);
 758         done = 0;
 759     }
 760
 761     if (!done)
 762         pa_operation_ref(o);
 763     else {
 764         if (o->callback) {
 765             pa_context_notify_cb_t cb = (pa_context_notify_cb_t) o->callback;
 766             cb(o->context, o->userdata);
 767         }
 768
 769         pa_operation_done(o);
 770     }
 771
 772     pa_operation_unref(o);
 773 }
 774
 775 pa_operation* pa_context_drain(pa_context *c, pa_context_notify_cb_t cb, void *userdata) {
 776     pa_operation *o;
 777
 778     assert(c);
 779     assert(c->ref >= 1);
 780
 781     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 782     PA_CHECK_VALIDITY_RETURN_NULL(c, pa_context_is_pending(c), PA_ERR_BADSTATE);
 783
 784     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 785     set_dispatch_callbacks(pa_operation_ref(o));
 786
 787     return o;
 788 }
 789
 790 void pa_context_simple_ack_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 791     pa_operation *o = userdata;
 792     int success = 1;
 793
 794     assert(pd);
 795     assert(o);
 796     assert(o->ref >= 1);
 797     assert(o->context);
 798
 799     if (command != PA_COMMAND_REPLY) {
 800         if (pa_context_handle_error(o->context, command, t) < 0)
 801             goto finish;
 802
 803         success = 0;
 804     } else if (!pa_tagstruct_eof(t)) {
 805         pa_context_fail(o->context, PA_ERR_PROTOCOL);
 806         goto finish;
 807     }
 808
 809     if (o->callback) {
 810         pa_context_success_cb_t cb = (pa_context_success_cb_t) o->callback;
 811         cb(o->context, success, o->userdata);
 812     }
 813
 814 finish:
 815     pa_operation_done(o);
 816     pa_operation_unref(o);
 817 }
 818
 819 pa_operation* pa_context_exit_daemon(pa_context *c, pa_context_success_cb_t cb, void *userdata) {
 820     pa_tagstruct *t;
 821     pa_operation *o;
 822     uint32_t tag;
 823
 824     assert(c);
 825     assert(c->ref >= 1);
 826
 827     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 828
 829     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 830
 831     t = pa_tagstruct_new(NULL, 0);
 832     pa_tagstruct_putu32(t, PA_COMMAND_EXIT);
 833     pa_tagstruct_putu32(t, tag = c->ctag++);
 834     pa_pstream_send_tagstruct(c->pstream, t);
 835     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o));
 836
 837     return o;
 838 }
 839
 840 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) {
 841     pa_tagstruct *t;
 842     pa_operation *o;
 843     uint32_t tag;
 844
 845     assert(c);
 846     assert(c->ref >= 1);
 847
 848     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 849
 850     o = pa_operation_new(c, NULL, cb, o->userdata);
 851
 852     t = pa_tagstruct_new(NULL, 0);
 853     pa_tagstruct_putu32(t, command);
 854     pa_tagstruct_putu32(t, tag = c->ctag++);
 855     pa_pstream_send_tagstruct(c->pstream, t);
 856     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, internal_cb, pa_operation_ref(o));
 857
 858     return o;
 859 }
 860
 861 pa_operation* pa_context_set_default_sink(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 862     pa_tagstruct *t;
 863     pa_operation *o;
 864     uint32_t tag;
 865
 866     assert(c);
 867     assert(c->ref >= 1);
 868
 869     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 870
 871     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 872
 873     t = pa_tagstruct_new(NULL, 0);
 874     pa_tagstruct_putu32(t, PA_COMMAND_SET_DEFAULT_SINK);
 875     pa_tagstruct_putu32(t, tag = c->ctag++);
 876     pa_tagstruct_puts(t, name);
 877     pa_pstream_send_tagstruct(c->pstream, t);
 878     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o));
 879
 880     return o;
 881 }
 882
 883 pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 884     pa_tagstruct *t;
 885     pa_operation *o;
 886     uint32_t tag;
 887
 888     assert(c);
 889     assert(c->ref >= 1);
 890
 891     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 892
 893     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 894
 895     t = pa_tagstruct_new(NULL, 0);
 896     pa_tagstruct_putu32(t, PA_COMMAND_SET_DEFAULT_SOURCE);
 897     pa_tagstruct_putu32(t, tag = c->ctag++);
 898     pa_tagstruct_puts(t, name);
 899     pa_pstream_send_tagstruct(c->pstream, t);
 900     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o));
 901
 902     return o;
 903 }
 904
 905 int pa_context_is_local(pa_context *c) {
 906     assert(c);
 907
 908     return c->local;
 909 }
 910
 911 pa_operation* pa_context_set_name(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) {
 912     pa_tagstruct *t;
 913     pa_operation *o;
 914     uint32_t tag;
 915
 916     assert(c);
 917     assert(c->ref >= 1);
 918     assert(name);
 919
 920     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 921
 922     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 923
 924     t = pa_tagstruct_new(NULL, 0);
 925     pa_tagstruct_putu32(t, PA_COMMAND_SET_CLIENT_NAME);
 926     pa_tagstruct_putu32(t, tag = c->ctag++);
 927     pa_tagstruct_puts(t, name);
 928     pa_pstream_send_tagstruct(c->pstream, t);
 929     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT,  pa_context_simple_ack_callback, pa_operation_ref(o));
 930
 931     return o;
 932 }
 933
 934 const char* pa_get_library_version(void) {
 935     return PACKAGE_VERSION;
 936 }
 937
 938 const char* pa_context_get_server(pa_context *c) {
 939     assert(c);
 940     assert(c->ref >= 1);
 941
 942     if (!c->server)
 943         return NULL;
 944
 945     if (*c->server == '{') {
 946         char *e = strchr(c->server+1, '}');
 947         return e ? e+1 : c->server;
 948     }
 949
 950     return c->server;
 951 }