code.delx.au - pulseaudio/blob - polyp/polyplib-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 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 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 <sys/socket.h>
  32 #include <netdb.h>
  33
  34 #include "polyplib-internal.h"
  35 #include "polyplib-context.h"
  36 #include "native-common.h"
  37 #include "pdispatch.h"
  38 #include "pstream.h"
  39 #include "dynarray.h"
  40 #include "socket-client.h"
  41 #include "pstream-util.h"
  42 #include "authkey.h"
  43 #include "util.h"
  44 #include "xmalloc.h"
  45
  46 static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = {
  47     [PA_COMMAND_REQUEST] = { pa_command_request },
  48     [PA_COMMAND_PLAYBACK_STREAM_KILLED] = { pa_command_stream_killed },
  49     [PA_COMMAND_RECORD_STREAM_KILLED] = { pa_command_stream_killed },
  50     [PA_COMMAND_SUBSCRIBE_EVENT] = { pa_command_subscribe_event },
  51 };
  52
  53 struct pa_context *pa_context_new(struct pa_mainloop_api *mainloop, const char *name) {
  54     struct pa_context *c;
  55     assert(mainloop && name);
  56
  57     c = pa_xmalloc(sizeof(struct pa_context));
  58     c->ref = 1;
  59     c->name = pa_xstrdup(name);
  60     c->mainloop = mainloop;
  61     c->client = NULL;
  62     c->pstream = NULL;
  63     c->pdispatch = NULL;
  64     c->playback_streams = pa_dynarray_new();
  65     c->record_streams = pa_dynarray_new();
  66     assert(c->playback_streams && c->record_streams);
  67
  68     PA_LLIST_HEAD_INIT(struct pa_stream, c->streams);
  69     PA_LLIST_HEAD_INIT(struct pa_operation, c->operations);
  70
  71     c->error = PA_ERROR_OK;
  72     c->state = PA_CONTEXT_UNCONNECTED;
  73     c->ctag = 0;
  74
  75     c->state_callback = NULL;
  76     c->state_userdata = NULL;
  77
  78     c->subscribe_callback = NULL;
  79     c->subscribe_userdata = NULL;
  80
  81     c->memblock_stat = pa_memblock_stat_new();
  82
  83     pa_check_for_sigpipe();
  84     return c;
  85 }
  86
  87 static void context_free(struct pa_context *c) {
  88     assert(c);
  89
  90     while (c->operations)
  91         pa_operation_cancel(c->operations);
  92
  93     while (c->streams)
  94         pa_stream_set_state(c->streams, PA_STREAM_TERMINATED);
  95
  96     if (c->client)
  97         pa_socket_client_unref(c->client);
  98     if (c->pdispatch)
  99         pa_pdispatch_unref(c->pdispatch);
 100     if (c->pstream) {
 101         pa_pstream_close(c->pstream);
 102         pa_pstream_unref(c->pstream);
 103     }
 104
 105     if (c->record_streams)
 106         pa_dynarray_free(c->record_streams, NULL, NULL);
 107     if (c->playback_streams)
 108         pa_dynarray_free(c->playback_streams, NULL, NULL);
 109
 110     pa_memblock_stat_unref(c->memblock_stat);
 111
 112     pa_xfree(c->name);
 113     pa_xfree(c);
 114 }
 115
 116 struct pa_context* pa_context_ref(struct pa_context *c) {
 117     assert(c && c->ref >= 1);
 118     c->ref++;
 119     return c;
 120 }
 121
 122 void pa_context_unref(struct pa_context *c) {
 123     assert(c && c->ref >= 1);
 124
 125     if ((--(c->ref)) == 0)
 126         context_free(c);
 127 }
 128
 129 void pa_context_set_state(struct pa_context *c, enum pa_context_state st) {
 130     assert(c);
 131
 132     if (c->state == st)
 133         return;
 134
 135     pa_context_ref(c);
 136
 137     if (st == PA_CONTEXT_FAILED || st == PA_CONTEXT_TERMINATED) {
 138         struct pa_stream *s;
 139
 140         s = c->streams ? pa_stream_ref(c->streams) : NULL;
 141         while (s) {
 142             struct pa_stream *n = s->next ? pa_stream_ref(s->next) : NULL;
 143             pa_stream_set_state(s, st == PA_CONTEXT_FAILED ? PA_STREAM_FAILED : PA_STREAM_TERMINATED);
 144             pa_stream_unref(s);
 145             s = n;
 146         }
 147
 148         if (c->pdispatch)
 149             pa_pdispatch_unref(c->pdispatch);
 150         c->pdispatch = NULL;
 151
 152         if (c->pstream) {
 153             pa_pstream_close(c->pstream);
 154             pa_pstream_unref(c->pstream);
 155         }
 156         c->pstream = NULL;
 157
 158         if (c->client)
 159             pa_socket_client_unref(c->client);
 160         c->client = NULL;
 161     }
 162
 163     c->state = st;
 164     if (c->state_callback)
 165         c->state_callback(c, c->state_userdata);
 166
 167     pa_context_unref(c);
 168 }
 169
 170 void pa_context_fail(struct pa_context *c, int error) {
 171     assert(c);
 172     c->error = error;
 173     pa_context_set_state(c, PA_CONTEXT_FAILED);
 174 }
 175
 176 static void pstream_die_callback(struct pa_pstream *p, void *userdata) {
 177     struct pa_context *c = userdata;
 178     assert(p && c);
 179     pa_context_fail(c, PA_ERROR_CONNECTIONTERMINATED);
 180 }
 181
 182 static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) {
 183     struct pa_context *c = userdata;
 184     assert(p && packet && c);
 185
 186     pa_context_ref(c);
 187
 188     if (pa_pdispatch_run(c->pdispatch, packet, c) < 0) {
 189         fprintf(stderr, "polyp.c: invalid packet.\n");
 190         pa_context_fail(c, PA_ERROR_PROTOCOL);
 191     }
 192
 193     pa_context_unref(c);
 194 }
 195
 196 static void pstream_memblock_callback(struct pa_pstream *p, uint32_t channel, int32_t delta, const struct pa_memchunk *chunk, void *userdata) {
 197     struct pa_context *c = userdata;
 198     struct pa_stream *s;
 199     assert(p && chunk && c && chunk->memblock && chunk->memblock->data);
 200
 201     pa_context_ref(c);
 202
 203     if ((s = pa_dynarray_get(c->record_streams, channel))) {
 204         if (s->read_callback)
 205             s->read_callback(s, chunk->memblock->data + chunk->index, chunk->length, s->read_userdata);
 206     }
 207
 208     pa_context_unref(c);
 209 }
 210
 211 int pa_context_handle_error(struct pa_context *c, uint32_t command, struct pa_tagstruct *t) {
 212     assert(c && t);
 213
 214     if (command == PA_COMMAND_ERROR) {
 215         if (pa_tagstruct_getu32(t, &c->error) < 0) {
 216             pa_context_fail(c, PA_ERROR_PROTOCOL);
 217             return -1;
 218
 219         }
 220     } else if (command == PA_COMMAND_TIMEOUT)
 221         c->error = PA_ERROR_TIMEOUT;
 222     else {
 223         pa_context_fail(c, PA_ERROR_PROTOCOL);
 224         return -1;
 225     }
 226
 227     return 0;
 228 }
 229
 230 static void setup_complete_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 231     struct pa_context *c = userdata;
 232     assert(pd && c && (c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME));
 233
 234     pa_context_ref(c);
 235
 236     if (command != PA_COMMAND_REPLY) {
 237         if (pa_context_handle_error(c, command, t) < 0)
 238             pa_context_fail(c, PA_ERROR_PROTOCOL);
 239
 240         goto finish;
 241     }
 242
 243     switch(c->state) {
 244         case PA_CONTEXT_AUTHORIZING: {
 245             struct pa_tagstruct *t;
 246             t = pa_tagstruct_new(NULL, 0);
 247             assert(t);
 248             pa_tagstruct_putu32(t, PA_COMMAND_SET_NAME);
 249             pa_tagstruct_putu32(t, tag = c->ctag++);
 250             pa_tagstruct_puts(t, c->name);
 251             pa_pstream_send_tagstruct(c->pstream, t);
 252             pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
 253
 254             pa_context_set_state(c, PA_CONTEXT_SETTING_NAME);
 255             break;
 256         }
 257
 258         case PA_CONTEXT_SETTING_NAME :
 259             pa_context_set_state(c, PA_CONTEXT_READY);
 260             break;
 261
 262         default:
 263             assert(0);
 264     }
 265
 266 finish:
 267     pa_context_unref(c);
 268 }
 269
 270 static void on_connection(struct pa_socket_client *client, struct pa_iochannel*io, void *userdata) {
 271     struct pa_context *c = userdata;
 272     struct pa_tagstruct *t;
 273     uint32_t tag;
 274     assert(client && c && c->state == PA_CONTEXT_CONNECTING);
 275
 276     pa_context_ref(c);
 277
 278     pa_socket_client_unref(client);
 279     c->client = NULL;
 280
 281     if (!io) {
 282         pa_context_fail(c, PA_ERROR_CONNECTIONREFUSED);
 283         goto finish;
 284     }
 285
 286     assert(!c->pstream);
 287     c->pstream = pa_pstream_new(c->mainloop, io, c->memblock_stat);
 288     assert(c->pstream);
 289
 290     pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
 291     pa_pstream_set_recieve_packet_callback(c->pstream, pstream_packet_callback, c);
 292     pa_pstream_set_recieve_memblock_callback(c->pstream, pstream_memblock_callback, c);
 293
 294     assert(!c->pdispatch);
 295     c->pdispatch = pa_pdispatch_new(c->mainloop, command_table, PA_COMMAND_MAX);
 296     assert(c->pdispatch);
 297
 298     t = pa_tagstruct_new(NULL, 0);
 299     assert(t);
 300     pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
 301     pa_tagstruct_putu32(t, tag = c->ctag++);
 302     pa_tagstruct_put_arbitrary(t, c->auth_cookie, sizeof(c->auth_cookie));
 303     pa_pstream_send_tagstruct(c->pstream, t);
 304     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c);
 305
 306     pa_context_set_state(c, PA_CONTEXT_AUTHORIZING);
 307
 308 finish:
 309     pa_context_unref(c);
 310 }
 311
 312 static struct sockaddr *resolve_server(const char *server, size_t *len) {
 313     struct sockaddr *sa;
 314     struct addrinfo hints, *result = NULL;
 315     char *port;
 316     assert(server && len);
 317
 318     if ((port = strrchr(server, ':')))
 319         port++;
 320     if (!port)
 321         port = DEFAULT_PORT;
 322
 323     memset(&hints, 0, sizeof(hints));
 324     hints.ai_family = PF_UNSPEC;
 325     hints.ai_socktype = SOCK_STREAM;
 326     hints.ai_protocol = 0;
 327
 328     if (getaddrinfo(server, port, &hints, &result) != 0)
 329         return NULL;
 330     assert(result);
 331
 332     sa = pa_xmalloc(*len = result->ai_addrlen);
 333     memcpy(sa, result->ai_addr, *len);
 334
 335     freeaddrinfo(result);
 336
 337     return sa;
 338 }
 339
 340 int pa_context_connect(struct pa_context *c, const char *server) {
 341     int r = -1;
 342     assert(c && c->ref >= 1 && c->state == PA_CONTEXT_UNCONNECTED);
 343
 344     pa_context_ref(c);
 345
 346     if (pa_authkey_load_from_home(PA_NATIVE_COOKIE_FILE, c->auth_cookie, sizeof(c->auth_cookie)) < 0) {
 347         pa_context_fail(c, PA_ERROR_AUTHKEY);
 348         goto finish;
 349     }
 350
 351     if (!server)
 352         if (!(server = getenv(ENV_DEFAULT_SERVER)))
 353             server = DEFAULT_SERVER;
 354
 355     assert(!c->client);
 356
 357     if (*server == '/') {
 358         if (!(c->client = pa_socket_client_new_unix(c->mainloop, server))) {
 359             pa_context_fail(c, PA_ERROR_CONNECTIONREFUSED);
 360             goto finish;
 361         }
 362     } else {
 363         struct sockaddr* sa;
 364         size_t sa_len;
 365
 366         if (!(sa = resolve_server(server, &sa_len))) {
 367             pa_context_fail(c, PA_ERROR_INVALIDSERVER);
 368             goto finish;
 369         }
 370
 371         c->client = pa_socket_client_new_sockaddr(c->mainloop, sa, sa_len);
 372         pa_xfree(sa);
 373
 374         if (!c->client) {
 375             pa_context_fail(c, PA_ERROR_CONNECTIONREFUSED);
 376             goto finish;
 377         }
 378     }
 379
 380     pa_socket_client_set_callback(c->client, on_connection, c);
 381     pa_context_set_state(c, PA_CONTEXT_CONNECTING);
 382
 383     r = 0;
 384
 385 finish:
 386     pa_context_unref(c);
 387
 388     return r;
 389 }
 390
 391 void pa_context_disconnect(struct pa_context *c) {
 392     assert(c);
 393     pa_context_set_state(c, PA_CONTEXT_TERMINATED);
 394 }
 395
 396 enum pa_context_state pa_context_get_state(struct pa_context *c) {
 397     assert(c && c->ref >= 1);
 398     return c->state;
 399 }
 400
 401 int pa_context_errno(struct pa_context *c) {
 402     assert(c && c->ref >= 1);
 403     return c->error;
 404 }
 405
 406 void pa_context_set_state_callback(struct pa_context *c, void (*cb)(struct pa_context *c, void *userdata), void *userdata) {
 407     assert(c && c->ref >= 1);
 408     c->state_callback = cb;
 409     c->state_userdata = userdata;
 410 }
 411
 412 int pa_context_is_pending(struct pa_context *c) {
 413     assert(c && c->ref >= 1);
 414
 415     if (c->state != PA_CONTEXT_READY)
 416         return 0;
 417
 418     assert(c->pstream && c->pdispatch);
 419     return pa_pstream_is_pending(c->pstream) || pa_pdispatch_is_pending(c->pdispatch);
 420 }
 421
 422 static void set_dispatch_callbacks(struct pa_operation *o);
 423
 424 static void pdispatch_drain_callback(struct pa_pdispatch*pd, void *userdata) {
 425     set_dispatch_callbacks(userdata);
 426 }
 427
 428 static void pstream_drain_callback(struct pa_pstream *s, void *userdata) {
 429     set_dispatch_callbacks(userdata);
 430 }
 431
 432 static void set_dispatch_callbacks(struct pa_operation *o) {
 433     int done = 1;
 434     assert(o && o->context && o->context->ref >= 1 && o->ref >= 1 && o->context->state == PA_CONTEXT_READY);
 435
 436     pa_pstream_set_drain_callback(o->context->pstream, NULL, NULL);
 437     pa_pdispatch_set_drain_callback(o->context->pdispatch, NULL, NULL);
 438
 439     if (pa_pdispatch_is_pending(o->context->pdispatch)) {
 440         pa_pdispatch_set_drain_callback(o->context->pdispatch, pdispatch_drain_callback, o);
 441         done = 0;
 442     }
 443
 444     if (pa_pstream_is_pending(o->context->pstream)) {
 445         pa_pstream_set_drain_callback(o->context->pstream, pstream_drain_callback, o);
 446         done = 0;
 447     }
 448
 449     if (!done)
 450         pa_operation_ref(o);
 451     else {
 452         if (o->callback) {
 453             void (*cb)(struct pa_context *c, void *userdata);
 454             cb = (void*) o->callback;
 455             cb(o->context, o->userdata);
 456         }
 457
 458         pa_operation_done(o);
 459     }
 460
 461     pa_operation_unref(o);
 462 }
 463
 464 struct pa_operation* pa_context_drain(struct pa_context *c, void (*cb) (struct pa_context*c, void *userdata), void *userdata) {
 465     struct pa_operation *o;
 466     assert(c && c->ref >= 1 && c->state == PA_CONTEXT_READY);
 467
 468     if (!pa_context_is_pending(c))
 469         return NULL;
 470
 471     o = pa_operation_new(c, NULL);
 472     assert(o);
 473     o->callback = cb;
 474     o->userdata = userdata;
 475
 476     set_dispatch_callbacks(pa_operation_ref(o));
 477
 478     return o;
 479 }
 480
 481 void pa_context_exit_daemon(struct pa_context *c) {
 482     struct pa_tagstruct *t;
 483     assert(c && c->ref >= 1);
 484
 485     t = pa_tagstruct_new(NULL, 0);
 486     assert(t);
 487     pa_tagstruct_putu32(t, PA_COMMAND_EXIT);
 488     pa_tagstruct_putu32(t, c->ctag++);
 489     pa_pstream_send_tagstruct(c->pstream, t);
 490 }
 491
 492 void pa_context_simple_ack_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 493     struct pa_operation *o = userdata;
 494     int success = 1;
 495     assert(pd && o && o->context && o->ref >= 1);
 496
 497     if (command != PA_COMMAND_REPLY) {
 498         if (pa_context_handle_error(o->context, command, t) < 0)
 499             goto finish;
 500
 501         success = 0;
 502     } else if (!pa_tagstruct_eof(t)) {
 503         pa_context_fail(o->context, PA_ERROR_PROTOCOL);
 504         goto finish;
 505     }
 506
 507     if (o->callback) {
 508         void (*cb)(struct pa_context *c, int success, void *userdata) = o->callback;
 509         cb(o->context, success, o->userdata);
 510     }
 511
 512 finish:
 513     pa_operation_done(o);
 514     pa_operation_unref(o);
 515 }
 516
 517 struct pa_operation* pa_context_send_simple_command(struct pa_context *c, uint32_t command, void (*internal_callback)(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata), void (*cb)(), void *userdata) {
 518     struct pa_tagstruct *t;
 519     struct pa_operation *o;
 520     uint32_t tag;
 521     assert(c && cb);
 522
 523     o = pa_operation_new(c, NULL);
 524     o->callback = cb;
 525     o->userdata = userdata;
 526
 527     t = pa_tagstruct_new(NULL, 0);
 528     pa_tagstruct_putu32(t, command);
 529     pa_tagstruct_putu32(t, tag = c->ctag++);
 530     pa_pstream_send_tagstruct(c->pstream, t);
 531     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, internal_callback, o);
 532
 533     return pa_operation_ref(o);
 534 }
 535
 536 const char* pa_get_library_version(void) {
 537     return PACKAGE_VERSION;
 538 }