polyp/protocol-native.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 <string.h>
  27 #include <stdio.h>
  28 #include <assert.h>
  29 #include <stdlib.h>
  30
  31 #include "protocol-native.h"
  32 #include "native-common.h"
  33 #include "packet.h"
  34 #include "client.h"
  35 #include "source-output.h"
  36 #include "sink-input.h"
  37 #include "pstream.h"
  38 #include "tagstruct.h"
  39 #include "pdispatch.h"
  40 #include "pstream-util.h"
  41 #include "authkey.h"
  42 #include "namereg.h"
  43 #include "scache.h"
  44 #include "xmalloc.h"
  45 #include "util.h"
  46 #include "subscribe.h"
  47
  48 struct connection;
  49 struct pa_protocol_native;
  50
  51 struct record_stream {
  52     struct connection *connection;
  53     uint32_t index;
  54     struct pa_source_output *source_output;
  55     struct pa_memblockq *memblockq;
  56     size_t fragment_size;
  57 };
  58
  59 struct playback_stream {
  60     int type;
  61     struct connection *connection;
  62     uint32_t index;
  63     struct pa_sink_input *sink_input;
  64     struct pa_memblockq *memblockq;
  65     size_t requested_bytes;
  66     int drain_request;
  67     uint32_t drain_tag;
  68 };
  69
  70 struct upload_stream {
  71     int type;
  72     struct connection *connection;
  73     uint32_t index;
  74     struct pa_memchunk memchunk;
  75     size_t length;
  76     char *name;
  77     struct pa_sample_spec sample_spec;
  78 };
  79
  80 struct output_stream {
  81     int type;
  82 };
  83
  84 enum {
  85     UPLOAD_STREAM,
  86     PLAYBACK_STREAM
  87 };
  88
  89 struct connection {
  90     int authorized;
  91     struct pa_protocol_native *protocol;
  92     struct pa_client *client;
  93     struct pa_pstream *pstream;
  94     struct pa_pdispatch *pdispatch;
  95     struct pa_idxset *record_streams, *output_streams;
  96     uint32_t rrobin_index;
  97     struct pa_subscription *subscription;
  98 };
  99
 100 struct pa_protocol_native {
 101     struct pa_module *module;
 102     int public;
 103     struct pa_core *core;
 104     struct pa_socket_server *server;
 105     struct pa_idxset *connections;
 106     uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
 107 };
 108
 109 static int sink_input_peek_cb(struct pa_sink_input *i, struct pa_memchunk *chunk);
 110 static void sink_input_drop_cb(struct pa_sink_input *i, size_t length);
 111 static void sink_input_kill_cb(struct pa_sink_input *i);
 112 static uint32_t sink_input_get_latency_cb(struct pa_sink_input *i);
 113
 114 static void request_bytes(struct playback_stream*s);
 115
 116 static void source_output_kill_cb(struct pa_source_output *o);
 117 static void source_output_push_cb(struct pa_source_output *o, const struct pa_memchunk *chunk);
 118
 119 static void command_exit(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 120 static void command_create_playback_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 121 static void command_drain_playback_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 122 static void command_create_record_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 123 static void command_delete_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 124 static void command_auth(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 125 static void command_set_name(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 126 static void command_lookup(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 127 static void command_stat(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 128 static void command_get_playback_latency(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 129 static void command_create_upload_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 130 static void command_finish_upload_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 131 static void command_play_sample(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 132 static void command_remove_sample(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 133 static void command_get_info(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 134 static void command_get_info_list(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 135 static void command_get_server_info(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 136 static void command_subscribe(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
 137
 138 static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = {
 139     [PA_COMMAND_ERROR] = { NULL },
 140     [PA_COMMAND_TIMEOUT] = { NULL },
 141     [PA_COMMAND_REPLY] = { NULL },
 142     [PA_COMMAND_CREATE_PLAYBACK_STREAM] = { command_create_playback_stream },
 143     [PA_COMMAND_DELETE_PLAYBACK_STREAM] = { command_delete_stream },
 144     [PA_COMMAND_DRAIN_PLAYBACK_STREAM] = { command_drain_playback_stream },
 145     [PA_COMMAND_CREATE_RECORD_STREAM] = { command_create_record_stream },
 146     [PA_COMMAND_DELETE_RECORD_STREAM] = { command_delete_stream },
 147     [PA_COMMAND_AUTH] = { command_auth },
 148     [PA_COMMAND_REQUEST] = { NULL },
 149     [PA_COMMAND_EXIT] = { command_exit },
 150     [PA_COMMAND_SET_NAME] = { command_set_name },
 151     [PA_COMMAND_LOOKUP_SINK] = { command_lookup },
 152     [PA_COMMAND_LOOKUP_SOURCE] = { command_lookup },
 153     [PA_COMMAND_STAT] = { command_stat },
 154     [PA_COMMAND_GET_PLAYBACK_LATENCY] = { command_get_playback_latency },
 155     [PA_COMMAND_CREATE_UPLOAD_STREAM] = { command_create_upload_stream },
 156     [PA_COMMAND_DELETE_UPLOAD_STREAM] = { command_delete_stream },
 157     [PA_COMMAND_FINISH_UPLOAD_STREAM] = { command_finish_upload_stream },
 158     [PA_COMMAND_PLAY_SAMPLE] = { command_play_sample },
 159     [PA_COMMAND_REMOVE_SAMPLE] = { command_remove_sample },
 160     [PA_COMMAND_GET_SINK_INFO] = { command_get_info },
 161     [PA_COMMAND_GET_SOURCE_INFO] = { command_get_info },
 162     [PA_COMMAND_GET_CLIENT_INFO] = { command_get_info },
 163     [PA_COMMAND_GET_MODULE_INFO] = { command_get_info },
 164     [PA_COMMAND_GET_SINK_INFO_LIST] = { command_get_info_list },
 165     [PA_COMMAND_GET_SOURCE_INFO_LIST] = { command_get_info_list },
 166     [PA_COMMAND_GET_MODULE_INFO_LIST] = { command_get_info_list },
 167     [PA_COMMAND_GET_CLIENT_INFO_LIST] = { command_get_info_list },
 168     [PA_COMMAND_GET_SERVER_INFO] = { command_get_server_info },
 169     [PA_COMMAND_SUBSCRIBE] = { command_subscribe },
 170 };
 171
 172 /* structure management */
 173
 174 static struct upload_stream* upload_stream_new(struct connection *c, const struct pa_sample_spec *ss, const char *name, size_t length) {
 175     struct upload_stream *s;
 176     assert(c && ss && name && length);
 177
 178     s = pa_xmalloc(sizeof(struct upload_stream));
 179     s->type = UPLOAD_STREAM;
 180     s->connection = c;
 181     s->sample_spec = *ss;
 182     s->name = pa_xstrdup(name);
 183
 184     s->memchunk.memblock = NULL;
 185     s->memchunk.index = 0;
 186     s->memchunk.length = 0;
 187
 188     s->length = length;
 189
 190     pa_idxset_put(c->output_streams, s, &s->index);
 191     return s;
 192 }
 193
 194 static void upload_stream_free(struct upload_stream *o) {
 195     assert(o && o->connection);
 196
 197     pa_idxset_remove_by_data(o->connection->output_streams, o, NULL);
 198
 199     pa_xfree(o->name);
 200
 201     if (o->memchunk.memblock)
 202         pa_memblock_unref(o->memchunk.memblock);
 203
 204     pa_xfree(o);
 205 }
 206
 207 static struct record_stream* record_stream_new(struct connection *c, struct pa_source *source, const struct pa_sample_spec *ss, const char *name, size_t maxlength, size_t fragment_size) {
 208     struct record_stream *s;
 209     struct pa_source_output *source_output;
 210     size_t base;
 211     assert(c && source && ss && name && maxlength);
 212
 213     if (!(source_output = pa_source_output_new(source, name, ss)))
 214         return NULL;
 215
 216     s = pa_xmalloc(sizeof(struct record_stream));
 217     s->connection = c;
 218     s->source_output = source_output;
 219     s->source_output->push = source_output_push_cb;
 220     s->source_output->kill = source_output_kill_cb;
 221     s->source_output->userdata = s;
 222     s->source_output->owner = c->protocol->module;
 223     s->source_output->client = c->client;
 224
 225     s->memblockq = pa_memblockq_new(maxlength, 0, base = pa_frame_size(ss), 0, 0);
 226     assert(s->memblockq);
 227
 228     s->fragment_size = (fragment_size/base)*base;
 229     if (!s->fragment_size)
 230         s->fragment_size = base;
 231
 232     pa_idxset_put(c->record_streams, s, &s->index);
 233     return s;
 234 }
 235
 236 static void record_stream_free(struct record_stream* r) {
 237     assert(r && r->connection);
 238
 239     pa_idxset_remove_by_data(r->connection->record_streams, r, NULL);
 240     pa_source_output_free(r->source_output);
 241     pa_memblockq_free(r->memblockq);
 242     pa_xfree(r);
 243 }
 244
 245 static struct playback_stream* playback_stream_new(struct connection *c, struct pa_sink *sink, const struct pa_sample_spec *ss, const char *name,
 246                                                    size_t maxlength,
 247                                                    size_t tlength,
 248                                                    size_t prebuf,
 249                                                    size_t minreq) {
 250     struct playback_stream *s;
 251     struct pa_sink_input *sink_input;
 252     assert(c && sink && ss && name && maxlength);
 253
 254     if (!(sink_input = pa_sink_input_new(sink, name, ss)))
 255         return NULL;
 256
 257     s = pa_xmalloc(sizeof(struct playback_stream));
 258     s->type = PLAYBACK_STREAM;
 259     s->connection = c;
 260     s->sink_input = sink_input;
 261
 262     s->sink_input->peek = sink_input_peek_cb;
 263     s->sink_input->drop = sink_input_drop_cb;
 264     s->sink_input->kill = sink_input_kill_cb;
 265     s->sink_input->get_latency = sink_input_get_latency_cb;
 266     s->sink_input->userdata = s;
 267     s->sink_input->owner = c->protocol->module;
 268     s->sink_input->client = c->client;
 269
 270     s->memblockq = pa_memblockq_new(maxlength, tlength, pa_frame_size(ss), prebuf, minreq);
 271     assert(s->memblockq);
 272
 273     s->requested_bytes = 0;
 274     s->drain_request = 0;
 275
 276     pa_idxset_put(c->output_streams, s, &s->index);
 277     return s;
 278 }
 279
 280 static void playback_stream_free(struct playback_stream* p) {
 281     assert(p && p->connection);
 282
 283     if (p->drain_request)
 284         pa_pstream_send_error(p->connection->pstream, p->drain_tag, PA_ERROR_NOENTITY);
 285
 286     pa_idxset_remove_by_data(p->connection->output_streams, p, NULL);
 287     pa_sink_input_free(p->sink_input);
 288     pa_memblockq_free(p->memblockq);
 289     pa_xfree(p);
 290 }
 291
 292 static void connection_free(struct connection *c) {
 293     struct record_stream *r;
 294     struct output_stream *o;
 295     assert(c && c->protocol);
 296
 297     pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
 298     while ((r = pa_idxset_first(c->record_streams, NULL)))
 299         record_stream_free(r);
 300     pa_idxset_free(c->record_streams, NULL, NULL);
 301
 302     while ((o = pa_idxset_first(c->output_streams, NULL)))
 303         if (o->type == PLAYBACK_STREAM)
 304             playback_stream_free((struct playback_stream*) o);
 305         else
 306             upload_stream_free((struct upload_stream*) o);
 307     pa_idxset_free(c->output_streams, NULL, NULL);
 308
 309     pa_pdispatch_free(c->pdispatch);
 310     pa_pstream_free(c->pstream);
 311     pa_client_free(c->client);
 312
 313     if (c->subscription)
 314         pa_subscription_free(c->subscription);
 315
 316     pa_xfree(c);
 317 }
 318
 319 static void request_bytes(struct playback_stream *s) {
 320     struct pa_tagstruct *t;
 321     size_t l;
 322     assert(s);
 323
 324     if (!(l = pa_memblockq_missing(s->memblockq)))
 325         return;
 326
 327     if (l <= s->requested_bytes)
 328         return;
 329
 330     l -= s->requested_bytes;
 331
 332     if (l < pa_memblockq_get_minreq(s->memblockq))
 333         return;
 334
 335     s->requested_bytes += l;
 336
 337     t = pa_tagstruct_new(NULL, 0);
 338     assert(t);
 339     pa_tagstruct_putu32(t, PA_COMMAND_REQUEST);
 340     pa_tagstruct_putu32(t, (uint32_t) -1); /* tag */
 341     pa_tagstruct_putu32(t, s->index);
 342     pa_tagstruct_putu32(t, l);
 343     pa_pstream_send_tagstruct(s->connection->pstream, t);
 344
 345     /*fprintf(stderr, "Requesting %u bytes\n", l);*/
 346 }
 347
 348 static void send_memblock(struct connection *c) {
 349     uint32_t start;
 350     struct record_stream *r;
 351
 352     start = PA_IDXSET_INVALID;
 353     for (;;) {
 354         struct pa_memchunk chunk;
 355
 356         if (!(r = pa_idxset_rrobin(c->record_streams, &c->rrobin_index)))
 357             return;
 358
 359         if (start == PA_IDXSET_INVALID)
 360             start = c->rrobin_index;
 361         else if (start == c->rrobin_index)
 362             return;
 363
 364         if (pa_memblockq_peek(r->memblockq,  &chunk) >= 0) {
 365             if (chunk.length > r->fragment_size)
 366                 chunk.length = r->fragment_size;
 367
 368             pa_pstream_send_memblock(c->pstream, r->index, 0, &chunk);
 369             pa_memblockq_drop(r->memblockq, chunk.length);
 370             pa_memblock_unref(chunk.memblock);
 371
 372             return;
 373         }
 374     }
 375 }
 376
 377 static void send_playback_stream_killed(struct playback_stream *p) {
 378     struct pa_tagstruct *t;
 379     assert(p);
 380
 381     t = pa_tagstruct_new(NULL, 0);
 382     assert(t);
 383     pa_tagstruct_putu32(t, PA_COMMAND_PLAYBACK_STREAM_KILLED);
 384     pa_tagstruct_putu32(t, (uint32_t) -1); /* tag */
 385     pa_tagstruct_putu32(t, p->index);
 386     pa_pstream_send_tagstruct(p->connection->pstream, t);
 387 }
 388
 389 static void send_record_stream_killed(struct record_stream *r) {
 390     struct pa_tagstruct *t;
 391     assert(r);
 392
 393     t = pa_tagstruct_new(NULL, 0);
 394     assert(t);
 395     pa_tagstruct_putu32(t, PA_COMMAND_RECORD_STREAM_KILLED);
 396     pa_tagstruct_putu32(t, (uint32_t) -1); /* tag */
 397     pa_tagstruct_putu32(t, r->index);
 398     pa_pstream_send_tagstruct(r->connection->pstream, t);
 399 }
 400
 401
 402 /*** sinkinput callbacks ***/
 403
 404 static int sink_input_peek_cb(struct pa_sink_input *i, struct pa_memchunk *chunk) {
 405     struct playback_stream *s;
 406     assert(i && i->userdata && chunk);
 407     s = i->userdata;
 408
 409     if (pa_memblockq_peek(s->memblockq, chunk) < 0)
 410         return -1;
 411
 412     return 0;
 413 }
 414
 415 static void sink_input_drop_cb(struct pa_sink_input *i, size_t length) {
 416     struct playback_stream *s;
 417     assert(i && i->userdata && length);
 418     s = i->userdata;
 419
 420     pa_memblockq_drop(s->memblockq, length);
 421     request_bytes(s);
 422
 423     if (s->drain_request && !pa_memblockq_is_readable(s->memblockq)) {
 424         pa_pstream_send_simple_ack(s->connection->pstream, s->drain_tag);
 425         s->drain_request = 0;
 426     }
 427 }
 428
 429 static void sink_input_kill_cb(struct pa_sink_input *i) {
 430     assert(i && i->userdata);
 431     send_playback_stream_killed((struct playback_stream *) i->userdata);
 432     playback_stream_free((struct playback_stream *) i->userdata);
 433 }
 434
 435 static uint32_t sink_input_get_latency_cb(struct pa_sink_input *i) {
 436     struct playback_stream *s;
 437     assert(i && i->userdata);
 438     s = i->userdata;
 439
 440     return pa_bytes_to_usec(pa_memblockq_get_length(s->memblockq), &s->sink_input->sample_spec);
 441 }
 442
 443 /*** source_output callbacks ***/
 444
 445 static void source_output_push_cb(struct pa_source_output *o, const struct pa_memchunk *chunk) {
 446     struct record_stream *s;
 447     assert(o && o->userdata && chunk);
 448     s = o->userdata;
 449
 450     pa_memblockq_push(s->memblockq, chunk, 0);
 451     if (!pa_pstream_is_pending(s->connection->pstream))
 452         send_memblock(s->connection);
 453 }
 454
 455 static void source_output_kill_cb(struct pa_source_output *o) {
 456     assert(o && o->userdata);
 457     send_record_stream_killed((struct record_stream *) o->userdata);
 458     record_stream_free((struct record_stream *) o->userdata);
 459 }
 460
 461 /*** pdispatch callbacks ***/
 462
 463 static void protocol_error(struct connection *c) {
 464     fprintf(stderr, __FILE__": protocol error, kicking client\n");
 465     connection_free(c);
 466 }
 467
 468 static void command_create_playback_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 469     struct connection *c = userdata;
 470     struct playback_stream *s;
 471     size_t maxlength, tlength, prebuf, minreq;
 472     uint32_t sink_index;
 473     const char *name, *sink_name;
 474     struct pa_sample_spec ss;
 475     struct pa_tagstruct *reply;
 476     struct pa_sink *sink;
 477     assert(c && t && c->protocol && c->protocol->core);
 478
 479     if (pa_tagstruct_gets(t, &name) < 0 ||
 480         pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
 481         pa_tagstruct_getu32(t, &sink_index) < 0 ||
 482         pa_tagstruct_gets(t, &sink_name) < 0 ||
 483         pa_tagstruct_getu32(t, &maxlength) < 0 ||
 484         pa_tagstruct_getu32(t, &tlength) < 0 ||
 485         pa_tagstruct_getu32(t, &prebuf) < 0 ||
 486         pa_tagstruct_getu32(t, &minreq) < 0 ||
 487         !pa_tagstruct_eof(t)) {
 488         protocol_error(c);
 489         return;
 490     }
 491
 492     if (!c->authorized) {
 493         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 494         return;
 495     }
 496
 497     if (sink_index != (uint32_t) -1)
 498         sink = pa_idxset_get_by_index(c->protocol->core->sinks, sink_index);
 499     else
 500         sink = pa_namereg_get(c->protocol->core, *sink_name ? sink_name : NULL, PA_NAMEREG_SINK, 1);
 501
 502     if (!sink) {
 503         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 504         return;
 505     }
 506
 507     if (!(s = playback_stream_new(c, sink, &ss, name, maxlength, tlength, prebuf, minreq))) {
 508         pa_pstream_send_error(c->pstream, tag, PA_ERROR_INVALID);
 509         return;
 510     }
 511
 512     reply = pa_tagstruct_new(NULL, 0);
 513     assert(reply);
 514     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 515     pa_tagstruct_putu32(reply, tag);
 516     pa_tagstruct_putu32(reply, s->index);
 517     assert(s->sink_input);
 518     pa_tagstruct_putu32(reply, s->sink_input->index);
 519     pa_pstream_send_tagstruct(c->pstream, reply);
 520     request_bytes(s);
 521 }
 522
 523 static void command_delete_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 524     struct connection *c = userdata;
 525     uint32_t channel;
 526     assert(c && t);
 527
 528     if (pa_tagstruct_getu32(t, &channel) < 0 ||
 529         !pa_tagstruct_eof(t)) {
 530         protocol_error(c);
 531         return;
 532     }
 533
 534     if (!c->authorized) {
 535         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 536         return;
 537     }
 538
 539     if (command == PA_COMMAND_DELETE_PLAYBACK_STREAM) {
 540         struct playback_stream *s;
 541         if (!(s = pa_idxset_get_by_index(c->output_streams, channel)) || (s->type != PLAYBACK_STREAM)) {
 542             pa_pstream_send_error(c->pstream, tag, PA_ERROR_EXIST);
 543             return;
 544         }
 545
 546         playback_stream_free(s);
 547     } else if (command == PA_COMMAND_DELETE_RECORD_STREAM) {
 548         struct record_stream *s;
 549         if (!(s = pa_idxset_get_by_index(c->record_streams, channel))) {
 550             pa_pstream_send_error(c->pstream, tag, PA_ERROR_EXIST);
 551             return;
 552         }
 553
 554         record_stream_free(s);
 555     } else {
 556         struct upload_stream *s;
 557         assert(command == PA_COMMAND_DELETE_UPLOAD_STREAM);
 558         if (!(s = pa_idxset_get_by_index(c->output_streams, channel)) || (s->type != UPLOAD_STREAM)) {
 559             pa_pstream_send_error(c->pstream, tag, PA_ERROR_EXIST);
 560             return;
 561         }
 562
 563         upload_stream_free(s);
 564     }
 565
 566     pa_pstream_send_simple_ack(c->pstream, tag);
 567 }
 568
 569 static void command_create_record_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 570     struct connection *c = userdata;
 571     struct record_stream *s;
 572     size_t maxlength, fragment_size;
 573     uint32_t source_index;
 574     const char *name, *source_name;
 575     struct pa_sample_spec ss;
 576     struct pa_tagstruct *reply;
 577     struct pa_source *source;
 578     assert(c && t && c->protocol && c->protocol->core);
 579
 580     if (pa_tagstruct_gets(t, &name) < 0 ||
 581         pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
 582         pa_tagstruct_getu32(t, &source_index) < 0 ||
 583         pa_tagstruct_gets(t, &source_name) < 0 ||
 584         pa_tagstruct_getu32(t, &maxlength) < 0 ||
 585         pa_tagstruct_getu32(t, &fragment_size) < 0 ||
 586         !pa_tagstruct_eof(t)) {
 587         protocol_error(c);
 588         return;
 589     }
 590
 591     if (!c->authorized) {
 592         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 593         return;
 594     }
 595
 596     if (source_index != (uint32_t) -1)
 597         source = pa_idxset_get_by_index(c->protocol->core->sources, source_index);
 598     else
 599         source = pa_namereg_get(c->protocol->core, *source_name ? source_name : NULL, PA_NAMEREG_SOURCE, 1);
 600
 601     if (!source) {
 602         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 603         return;
 604     }
 605
 606     if (!(s = record_stream_new(c, source, &ss, name, maxlength, fragment_size))) {
 607         pa_pstream_send_error(c->pstream, tag, PA_ERROR_INVALID);
 608         return;
 609     }
 610
 611     reply = pa_tagstruct_new(NULL, 0);
 612     assert(reply);
 613     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 614     pa_tagstruct_putu32(reply, tag);
 615     pa_tagstruct_putu32(reply, s->index);
 616     assert(s->source_output);
 617     pa_tagstruct_putu32(reply, s->source_output->index);
 618     pa_pstream_send_tagstruct(c->pstream, reply);
 619 }
 620
 621 static void command_exit(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 622     struct connection *c = userdata;
 623     assert(c && t);
 624
 625     if (!pa_tagstruct_eof(t)) {
 626         protocol_error(c);
 627         return;
 628     }
 629
 630     if (!c->authorized) {
 631         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 632         return;
 633     }
 634
 635     assert(c->protocol && c->protocol->core && c->protocol->core->mainloop);
 636     c->protocol->core->mainloop->quit(c->protocol->core->mainloop, 0);
 637     pa_pstream_send_simple_ack(c->pstream, tag); /* nonsense */
 638     return;
 639 }
 640
 641 static void command_auth(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 642     struct connection *c = userdata;
 643     const void*cookie;
 644     assert(c && t);
 645
 646     if (pa_tagstruct_get_arbitrary(t, &cookie, PA_NATIVE_COOKIE_LENGTH) < 0 ||
 647         !pa_tagstruct_eof(t)) {
 648         protocol_error(c);
 649         return;
 650     }
 651
 652     if (memcmp(c->protocol->auth_cookie, cookie, PA_NATIVE_COOKIE_LENGTH) != 0) {
 653         fprintf(stderr, "protocol-native.c: Denied access to client with invalid authorization key.\n");
 654         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 655         return;
 656     }
 657
 658     c->authorized = 1;
 659     pa_pstream_send_simple_ack(c->pstream, tag);
 660     return;
 661 }
 662
 663 static void command_set_name(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 664     struct connection *c = userdata;
 665     const char *name;
 666     assert(c && t);
 667
 668     if (pa_tagstruct_gets(t, &name) < 0 ||
 669         !pa_tagstruct_eof(t)) {
 670         protocol_error(c);
 671         return;
 672     }
 673
 674     pa_client_rename(c->client, name);
 675     pa_pstream_send_simple_ack(c->pstream, tag);
 676     return;
 677 }
 678
 679 static void command_lookup(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 680     struct connection *c = userdata;
 681     const char *name;
 682     uint32_t index = PA_IDXSET_INVALID;
 683     assert(c && t);
 684
 685     if (pa_tagstruct_gets(t, &name) < 0 ||
 686         !pa_tagstruct_eof(t)) {
 687         protocol_error(c);
 688         return;
 689     }
 690
 691     if (!c->authorized) {
 692         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 693         return;
 694     }
 695
 696     if (command == PA_COMMAND_LOOKUP_SINK) {
 697         struct pa_sink *sink;
 698         if ((sink = pa_namereg_get(c->protocol->core, name, PA_NAMEREG_SINK, 1)))
 699             index = sink->index;
 700     } else {
 701         struct pa_source *source;
 702         assert(command == PA_COMMAND_LOOKUP_SOURCE);
 703         if ((source = pa_namereg_get(c->protocol->core, name, PA_NAMEREG_SOURCE, 1)))
 704             index = source->index;
 705     }
 706
 707     if (index == PA_IDXSET_INVALID)
 708         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 709     else {
 710         struct pa_tagstruct *reply;
 711         reply = pa_tagstruct_new(NULL, 0);
 712         assert(reply);
 713         pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 714         pa_tagstruct_putu32(reply, tag);
 715         pa_tagstruct_putu32(reply, index);
 716         pa_pstream_send_tagstruct(c->pstream, reply);
 717     }
 718 }
 719
 720 static void command_drain_playback_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 721     struct connection *c = userdata;
 722     uint32_t index;
 723     struct playback_stream *s;
 724     assert(c && t);
 725
 726     if (pa_tagstruct_getu32(t, &index) < 0 ||
 727         !pa_tagstruct_eof(t)) {
 728         protocol_error(c);
 729         return;
 730     }
 731
 732     if (!c->authorized) {
 733         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 734         return;
 735     }
 736
 737     if (!(s = pa_idxset_get_by_index(c->output_streams, index)) || s->type != PLAYBACK_STREAM) {
 738         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 739         return;
 740     }
 741
 742     s->drain_request = 0;
 743
 744     if (!pa_memblockq_is_readable(s->memblockq))
 745         pa_pstream_send_simple_ack(c->pstream, tag);
 746     else {
 747         s->drain_request = 1;
 748         s->drain_tag = tag;
 749     }
 750 }
 751
 752 static void command_stat(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 753     struct connection *c = userdata;
 754     assert(c && t);
 755     struct pa_tagstruct *reply;
 756
 757     if (!pa_tagstruct_eof(t)) {
 758         protocol_error(c);
 759         return;
 760     }
 761
 762     if (!c->authorized) {
 763         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 764         return;
 765     }
 766
 767     reply = pa_tagstruct_new(NULL, 0);
 768     assert(reply);
 769     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 770     pa_tagstruct_putu32(reply, tag);
 771     pa_tagstruct_putu32(reply, pa_memblock_get_count());
 772     pa_tagstruct_putu32(reply, pa_memblock_get_total());
 773     pa_pstream_send_tagstruct(c->pstream, reply);
 774 }
 775
 776 static void command_get_playback_latency(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 777     struct connection *c = userdata;
 778     assert(c && t);
 779     struct pa_tagstruct *reply;
 780     struct playback_stream *s;
 781     uint32_t index, latency;
 782
 783     if (pa_tagstruct_getu32(t, &index) < 0 ||
 784         !pa_tagstruct_eof(t)) {
 785         protocol_error(c);
 786         return;
 787     }
 788
 789     if (!c->authorized) {
 790         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 791         return;
 792     }
 793
 794     if (!(s = pa_idxset_get_by_index(c->output_streams, index)) || s->type != PLAYBACK_STREAM) {
 795         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 796         return;
 797     }
 798
 799     latency = pa_sink_input_get_latency(s->sink_input);
 800     reply = pa_tagstruct_new(NULL, 0);
 801     assert(reply);
 802     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 803     pa_tagstruct_putu32(reply, tag);
 804     pa_tagstruct_putu32(reply, latency);
 805     pa_pstream_send_tagstruct(c->pstream, reply);
 806 }
 807
 808 static void command_create_upload_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 809     struct connection *c = userdata;
 810     struct upload_stream *s;
 811     size_t length;
 812     const char *name;
 813     struct pa_sample_spec ss;
 814     struct pa_tagstruct *reply;
 815     assert(c && t && c->protocol && c->protocol->core);
 816
 817     if (pa_tagstruct_gets(t, &name) < 0 ||
 818         pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
 819         pa_tagstruct_getu32(t, &length) < 0 ||
 820         !pa_tagstruct_eof(t)) {
 821         protocol_error(c);
 822         return;
 823     }
 824
 825     if (!c->authorized) {
 826         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 827         return;
 828     }
 829
 830     if ((length % pa_frame_size(&ss)) != 0 || length <= 0 || !*name) {
 831         pa_pstream_send_error(c->pstream, tag, PA_ERROR_INVALID);
 832         return;
 833     }
 834
 835     if (!(s = upload_stream_new(c, &ss, name, length))) {
 836         pa_pstream_send_error(c->pstream, tag, PA_ERROR_INVALID);
 837         return;
 838     }
 839
 840     reply = pa_tagstruct_new(NULL, 0);
 841     assert(reply);
 842     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
 843     pa_tagstruct_putu32(reply, tag);
 844     pa_tagstruct_putu32(reply, s->index);
 845     pa_pstream_send_tagstruct(c->pstream, reply);
 846
 847     reply = pa_tagstruct_new(NULL, 0);
 848     assert(reply);
 849     pa_tagstruct_putu32(reply, PA_COMMAND_REQUEST);
 850     pa_tagstruct_putu32(reply, (uint32_t) -1); /* tag */
 851     pa_tagstruct_putu32(reply, s->index);
 852     pa_tagstruct_putu32(reply, length);
 853     pa_pstream_send_tagstruct(c->pstream, reply);
 854 }
 855
 856 static void command_finish_upload_stream(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 857     struct connection *c = userdata;
 858     uint32_t channel;
 859     struct upload_stream *s;
 860     uint32_t index;
 861     assert(c && t);
 862
 863     if (pa_tagstruct_getu32(t, &channel) < 0 ||
 864         !pa_tagstruct_eof(t)) {
 865         protocol_error(c);
 866         return;
 867     }
 868
 869     if (!c->authorized) {
 870         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 871         return;
 872     }
 873
 874     if (!(s = pa_idxset_get_by_index(c->output_streams, channel)) || (s->type != UPLOAD_STREAM)) {
 875         pa_pstream_send_error(c->pstream, tag, PA_ERROR_EXIST);
 876         return;
 877     }
 878
 879     pa_scache_add_item(c->protocol->core, s->name, &s->sample_spec, &s->memchunk, &index);
 880     pa_pstream_send_simple_ack(c->pstream, tag);
 881     upload_stream_free(s);
 882 }
 883
 884 static void command_play_sample(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 885     struct connection *c = userdata;
 886     uint32_t sink_index, volume;
 887     struct pa_sink *sink;
 888     const char *name, *sink_name;
 889     assert(c && t);
 890
 891     if (pa_tagstruct_getu32(t, &sink_index) < 0 ||
 892         pa_tagstruct_gets(t, &sink_name) < 0 ||
 893         pa_tagstruct_getu32(t, &volume) < 0 ||
 894         pa_tagstruct_gets(t, &name) < 0 ||
 895         !pa_tagstruct_eof(t)) {
 896         protocol_error(c);
 897         return;
 898     }
 899
 900     if (!c->authorized) {
 901         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 902         return;
 903     }
 904
 905     if (sink_index != (uint32_t) -1)
 906         sink = pa_idxset_get_by_index(c->protocol->core->sinks, sink_index);
 907     else
 908         sink = pa_namereg_get(c->protocol->core, *sink_name ? sink_name : NULL, PA_NAMEREG_SINK, 1);
 909
 910     if (!sink) {
 911         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 912         return;
 913     }
 914
 915     if (pa_scache_play_item(c->protocol->core, name, sink, volume) < 0) {
 916         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 917         return;
 918     }
 919
 920     pa_pstream_send_simple_ack(c->pstream, tag);
 921 }
 922
 923 static void command_remove_sample(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 924     struct connection *c = userdata;
 925     const char *name;
 926     assert(c && t);
 927
 928     if (pa_tagstruct_gets(t, &name) < 0 ||
 929         !pa_tagstruct_eof(t)) {
 930         protocol_error(c);
 931         return;
 932     }
 933
 934     if (!c->authorized) {
 935         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
 936         return;
 937     }
 938
 939     if (pa_scache_remove_item(c->protocol->core, name) < 0) {
 940         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
 941         return;
 942     }
 943
 944     pa_pstream_send_simple_ack(c->pstream, tag);
 945 }
 946
 947 static void sink_fill_tagstruct(struct pa_tagstruct *t, struct pa_sink *sink) {
 948     assert(t && sink);
 949     pa_tagstruct_putu32(t, sink->index);
 950     pa_tagstruct_puts(t, sink->name);
 951     pa_tagstruct_puts(t, sink->description ? sink->description : "");
 952     pa_tagstruct_put_sample_spec(t, &sink->sample_spec);
 953     pa_tagstruct_putu32(t, sink->owner ? sink->owner->index : (uint32_t) -1);
 954     pa_tagstruct_putu32(t, sink->volume);
 955     pa_tagstruct_putu32(t, sink->monitor_source->index);
 956     pa_tagstruct_puts(t, sink->monitor_source->name);
 957     pa_tagstruct_putu32(t, pa_sink_get_latency(sink));
 958 }
 959
 960 static void source_fill_tagstruct(struct pa_tagstruct *t, struct pa_source *source) {
 961     assert(t && source);
 962     pa_tagstruct_putu32(t, source->index);
 963     pa_tagstruct_puts(t, source->name);
 964     pa_tagstruct_puts(t, source->description ? source->description : "");
 965     pa_tagstruct_put_sample_spec(t, &source->sample_spec);
 966     pa_tagstruct_putu32(t, source->owner ? source->owner->index : (uint32_t) -1);
 967     pa_tagstruct_putu32(t, source->monitor_of ? source->monitor_of->index : (uint32_t) -1);
 968     pa_tagstruct_puts(t, source->monitor_of ? source->monitor_of->name : "");
 969 }
 970
 971 static void client_fill_tagstruct(struct pa_tagstruct *t, struct pa_client *client) {
 972     assert(t && client);
 973     pa_tagstruct_putu32(t, client->index);
 974     pa_tagstruct_puts(t, client->name);
 975     pa_tagstruct_puts(t, client->protocol_name);
 976     pa_tagstruct_putu32(t, client->owner ? client->owner->index : (uint32_t) -1);
 977 }
 978
 979 static void module_fill_tagstruct(struct pa_tagstruct *t, struct pa_module *module) {
 980     assert(t && module);
 981     pa_tagstruct_putu32(t, module->index);
 982     pa_tagstruct_puts(t, module->name);
 983     pa_tagstruct_puts(t, module->argument ? module->argument : "");
 984     pa_tagstruct_putu32(t, module->n_used);
 985     pa_tagstruct_putu32(t, module->auto_unload);
 986 }
 987
 988 static void command_get_info(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 989     struct connection *c = userdata;
 990     uint32_t index;
 991     struct pa_sink *sink = NULL;
 992     struct pa_source *source = NULL;
 993     struct pa_client *client = NULL;
 994     struct pa_module *module = NULL;
 995     const char *name;
 996     struct pa_tagstruct *reply;
 997     assert(c && t);
 998
 999     if (pa_tagstruct_getu32(t, &index) < 0 ||
1000         pa_tagstruct_gets(t, &name) < 0 ||
1001         !pa_tagstruct_eof(t)) {
1002         protocol_error(c);
1003         return;
1004     }
1005
1006     if (!c->authorized) {
1007         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
1008         return;
1009     }
1010
1011     if (command == PA_COMMAND_GET_SINK_INFO) {
1012         if (index != (uint32_t) -1)
1013             sink = pa_idxset_get_by_index(c->protocol->core->sinks, index);
1014         else
1015             sink = pa_namereg_get(c->protocol->core, *name ? name : NULL, PA_NAMEREG_SINK, 1);
1016     } else if (command == PA_COMMAND_GET_SOURCE_INFO) {
1017         if (index != (uint32_t) -1)
1018             source = pa_idxset_get_by_index(c->protocol->core->sources, index);
1019         else
1020             source = pa_namereg_get(c->protocol->core, *name ? name : NULL, PA_NAMEREG_SOURCE, 1);
1021     } else if (command == PA_COMMAND_GET_CLIENT_INFO)
1022         client = pa_idxset_get_by_index(c->protocol->core->clients, index);
1023     else {
1024         assert(command == PA_COMMAND_GET_MODULE_INFO);
1025         module = pa_idxset_get_by_index(c->protocol->core->modules, index);
1026     }
1027
1028     if (!sink && !source && !client && !module) {
1029         pa_pstream_send_error(c->pstream, tag, PA_ERROR_NOENTITY);
1030         return;
1031     }
1032
1033     reply = pa_tagstruct_new(NULL, 0);
1034     assert(reply);
1035     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
1036     pa_tagstruct_putu32(reply, tag);
1037     if (sink)
1038         sink_fill_tagstruct(reply, sink);
1039     else if (source)
1040         source_fill_tagstruct(reply, source);
1041     else if (client)
1042         client_fill_tagstruct(reply, client);
1043     else
1044         module_fill_tagstruct(reply, module);
1045     pa_pstream_send_tagstruct(c->pstream, reply);
1046 }
1047
1048 static void command_get_info_list(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
1049     struct connection *c = userdata;
1050     struct pa_idxset *i;
1051     uint32_t index;
1052     void *p;
1053     struct pa_tagstruct *reply;
1054     assert(c && t);
1055
1056     if (!pa_tagstruct_eof(t)) {
1057         protocol_error(c);
1058         return;
1059     }
1060
1061     if (!c->authorized) {
1062         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
1063         return;
1064     }
1065
1066     reply = pa_tagstruct_new(NULL, 0);
1067     assert(reply);
1068     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
1069     pa_tagstruct_putu32(reply, tag);
1070
1071     if (command == PA_COMMAND_GET_SINK_INFO_LIST)
1072         i = c->protocol->core->sinks;
1073     else if (command == PA_COMMAND_GET_SOURCE_INFO_LIST)
1074         i = c->protocol->core->sources;
1075     else if (command == PA_COMMAND_GET_CLIENT_INFO_LIST)
1076         i = c->protocol->core->clients;
1077     else {
1078         assert(command == PA_COMMAND_GET_MODULE_INFO_LIST);
1079         i = c->protocol->core->modules;
1080     }
1081
1082     for (p = pa_idxset_first(i, &index); p; p = pa_idxset_next(i, &index)) {
1083         if (command == PA_COMMAND_GET_SINK_INFO_LIST)
1084             sink_fill_tagstruct(reply, p);
1085         else if (command == PA_COMMAND_GET_SOURCE_INFO_LIST)
1086             source_fill_tagstruct(reply, p);
1087         else if (command == PA_COMMAND_GET_CLIENT_INFO_LIST)
1088             client_fill_tagstruct(reply, p);
1089         else {
1090             assert(command == PA_COMMAND_GET_MODULE_INFO_LIST);
1091             module_fill_tagstruct(reply, p);
1092         }
1093     }
1094
1095     pa_pstream_send_tagstruct(c->pstream, reply);
1096 }
1097
1098 static void command_get_server_info(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
1099     struct connection *c = userdata;
1100     struct pa_tagstruct *reply;
1101     char txt[256];
1102     assert(c && t);
1103
1104     if (!pa_tagstruct_eof(t)) {
1105         protocol_error(c);
1106         return;
1107     }
1108
1109     if (!c->authorized) {
1110         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
1111         return;
1112     }
1113
1114     reply = pa_tagstruct_new(NULL, 0);
1115     assert(reply);
1116     pa_tagstruct_putu32(reply, PA_COMMAND_REPLY);
1117     pa_tagstruct_putu32(reply, tag);
1118     pa_tagstruct_puts(reply, PACKAGE_NAME);
1119     pa_tagstruct_puts(reply, PACKAGE_VERSION);
1120     pa_tagstruct_puts(reply, pa_get_user_name(txt, sizeof(txt)));
1121     pa_tagstruct_puts(reply, pa_get_host_name(txt, sizeof(txt)));
1122     pa_tagstruct_put_sample_spec(reply, &c->protocol->core->default_sample_spec);
1123     pa_pstream_send_tagstruct(c->pstream, reply);
1124 }
1125
1126 static void subscription_cb(struct pa_core *core, enum pa_subscription_event_type e, uint32_t index, void *userdata) {
1127     struct pa_tagstruct *t;
1128     struct connection *c = userdata;
1129     assert(c && core);
1130
1131     t = pa_tagstruct_new(NULL, 0);
1132     assert(t);
1133     pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE_EVENT);
1134     pa_tagstruct_putu32(t, (uint32_t) -1);
1135     pa_tagstruct_putu32(t, e);
1136     pa_tagstruct_putu32(t, index);
1137     pa_pstream_send_tagstruct(c->pstream, t);
1138 }
1139
1140 static void command_subscribe(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
1141     struct connection *c = userdata;
1142     enum pa_subscription_mask m;
1143     assert(c && t);
1144
1145     if (pa_tagstruct_getu32(t, &m) < 0 ||
1146         !pa_tagstruct_eof(t)) {
1147         protocol_error(c);
1148         return;
1149     }
1150
1151     if (!c->authorized) {
1152         pa_pstream_send_error(c->pstream, tag, PA_ERROR_ACCESS);
1153         return;
1154     }
1155
1156     if (c->subscription)
1157         pa_subscription_free(c->subscription);
1158
1159     if (m != 0) {
1160         c->subscription = pa_subscription_new(c->protocol->core, m, subscription_cb, c);
1161         assert(c->subscription);
1162     } else
1163         c->subscription = NULL;
1164
1165     pa_pstream_send_simple_ack(c->pstream, tag);
1166
1167 }
1168
1169 /*** pstream callbacks ***/
1170
1171 static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) {
1172     struct connection *c = userdata;
1173     assert(p && packet && packet->data && c);
1174
1175     if (pa_pdispatch_run(c->pdispatch, packet, c) < 0) {
1176         fprintf(stderr, "protocol-native: invalid packet.\n");
1177         connection_free(c);
1178     }
1179 }
1180
1181 static void pstream_memblock_callback(struct pa_pstream *p, uint32_t channel, int32_t delta, const struct pa_memchunk *chunk, void *userdata) {
1182     struct connection *c = userdata;
1183     struct output_stream *stream;
1184     assert(p && chunk && userdata);
1185
1186     if (!(stream = pa_idxset_get_by_index(c->output_streams, channel))) {
1187         fprintf(stderr, "protocol-native: client sent block for invalid stream.\n");
1188         connection_free(c);
1189         return;
1190     }
1191
1192     if (stream->type == PLAYBACK_STREAM) {
1193         struct playback_stream *p = (struct playback_stream*) stream;
1194         if (chunk->length >= p->requested_bytes)
1195             p->requested_bytes = 0;
1196         else
1197             p->requested_bytes -= chunk->length;
1198
1199         pa_memblockq_push_align(p->memblockq, chunk, delta);
1200         assert(p->sink_input);
1201         pa_sink_notify(p->sink_input->sink);
1202         /*fprintf(stderr, "Recieved %u bytes.\n", chunk->length);*/
1203     } else {
1204         struct upload_stream *u = (struct upload_stream*) stream;
1205         size_t l;
1206         assert(u->type == UPLOAD_STREAM);
1207
1208         if (!u->memchunk.memblock) {
1209             if (u->length == chunk->length) {
1210                 u->memchunk = *chunk;
1211                 pa_memblock_ref(u->memchunk.memblock);
1212                 u->length = 0;
1213                 fprintf(stderr, "COPY\n");
1214             } else {
1215                 u->memchunk.memblock = pa_memblock_new(u->length);
1216                 u->memchunk.index = u->memchunk.length = 0;
1217             }
1218         }
1219
1220         assert(u->memchunk.memblock);
1221
1222         l = u->length;
1223         if (l > chunk->length)
1224             l = chunk->length;
1225
1226         if (l > 0) {
1227             memcpy(u->memchunk.memblock->data + u->memchunk.index + u->memchunk.length, chunk->memblock->data+chunk->index, l);
1228             u->memchunk.length += l;
1229             u->length -= l;
1230         }
1231     }
1232 }
1233
1234 static void pstream_die_callback(struct pa_pstream *p, void *userdata) {
1235     struct connection *c = userdata;
1236     assert(p && c);
1237     connection_free(c);
1238
1239     fprintf(stderr, "protocol-native: connection died.\n");
1240 }
1241
1242
1243 static void pstream_drain_callback(struct pa_pstream *p, void *userdata) {
1244     struct connection *c = userdata;
1245     assert(p && c);
1246
1247     send_memblock(c);
1248 }
1249
1250 /*** client callbacks ***/
1251
1252 static void client_kill_cb(struct pa_client *c) {
1253     assert(c && c->userdata);
1254     connection_free(c->userdata);
1255 }
1256
1257 /*** socket server callbacks ***/
1258
1259 static void on_connection(struct pa_socket_server*s, struct pa_iochannel *io, void *userdata) {
1260     struct pa_protocol_native *p = userdata;
1261     struct connection *c;
1262     assert(s && io && p);
1263
1264     c = pa_xmalloc(sizeof(struct connection));
1265     c->authorized = p->public;
1266     c->protocol = p;
1267     assert(p->core);
1268     c->client = pa_client_new(p->core, "NATIVE", "Client");
1269     assert(c->client);
1270     c->client->kill = client_kill_cb;
1271     c->client->userdata = c;
1272     c->client->owner = p->module;
1273
1274     c->pstream = pa_pstream_new(p->core->mainloop, io);
1275     assert(c->pstream);
1276
1277     pa_pstream_set_recieve_packet_callback(c->pstream, pstream_packet_callback, c);
1278     pa_pstream_set_recieve_memblock_callback(c->pstream, pstream_memblock_callback, c);
1279     pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c);
1280     pa_pstream_set_drain_callback(c->pstream, pstream_drain_callback, c);
1281
1282     c->pdispatch = pa_pdispatch_new(p->core->mainloop, command_table, PA_COMMAND_MAX);
1283     assert(c->pdispatch);
1284
1285     c->record_streams = pa_idxset_new(NULL, NULL);
1286     c->output_streams = pa_idxset_new(NULL, NULL);
1287     assert(c->record_streams && c->output_streams);
1288
1289     c->rrobin_index = PA_IDXSET_INVALID;
1290     c->subscription = NULL;
1291
1292     pa_idxset_put(p->connections, c, NULL);
1293 }
1294
1295 /*** module entry points ***/
1296
1297 struct pa_protocol_native* pa_protocol_native_new(struct pa_core *core, struct pa_socket_server *server, struct pa_module *m, struct pa_modargs *ma) {
1298     struct pa_protocol_native *p;
1299     uint32_t public;
1300     assert(core && server && ma);
1301
1302     if (pa_modargs_get_value_u32(ma, "public", &public) < 0) {
1303         fprintf(stderr, __FILE__": public= expects numeric argument.\n");
1304         return NULL;
1305     }
1306
1307     p = pa_xmalloc(sizeof(struct pa_protocol_native));
1308
1309     if (pa_authkey_load_from_home(pa_modargs_get_value(ma, "cookie", PA_NATIVE_COOKIE_FILE), p->auth_cookie, sizeof(p->auth_cookie)) < 0) {
1310         pa_xfree(p);
1311         return NULL;
1312     }
1313
1314     p->module = m;
1315     p->public = public;
1316     p->server = server;
1317     p->core = core;
1318     p->connections = pa_idxset_new(NULL, NULL);
1319     assert(p->connections);
1320
1321     pa_socket_server_set_callback(p->server, on_connection, p);
1322
1323     return p;
1324 }
1325
1326 void pa_protocol_native_free(struct pa_protocol_native *p) {
1327     struct connection *c;
1328     assert(p);
1329
1330     while ((c = pa_idxset_first(p->connections, NULL)))
1331         connection_free(c);
1332     pa_idxset_free(p->connections, NULL, NULL);
1333     pa_socket_server_free(p->server);
1334     pa_xfree(p);
1335 }