code.delx.au - pulseaudio/blob - src/modules/module-tunnel.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 <unistd.h>
  27 #include <assert.h>
  28 #include <string.h>
  29 #include <errno.h>
  30 #include <sys/types.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33
  34 #include <polyp/version.h>
  35
  36 #include <polypcore/module.h>
  37 #include <polypcore/util.h>
  38 #include <polypcore/modargs.h>
  39 #include <polypcore/log.h>
  40 #include <polypcore/core-subscribe.h>
  41 #include <polypcore/xmalloc.h>
  42 #include <polypcore/sink-input.h>
  43 #include <polypcore/pdispatch.h>
  44 #include <polypcore/pstream.h>
  45 #include <polypcore/pstream-util.h>
  46 #include <polypcore/authkey.h>
  47 #include <polypcore/socket-client.h>
  48 #include <polypcore/socket-util.h>
  49 #include <polypcore/authkey-prop.h>
  50
  51 #ifdef TUNNEL_SINK
  52 #include "module-tunnel-sink-symdef.h"
  53 PA_MODULE_DESCRIPTION("Tunnel module for sinks")
  54 PA_MODULE_USAGE("server=<address> sink=<remote sink name> cookie=<filename> format=<sample format> channels=<number of channels> rate=<sample rate> sink_name=<name for the local sink>")
  55 #else
  56 #include "module-tunnel-source-symdef.h"
  57 PA_MODULE_DESCRIPTION("Tunnel module for sources")
  58 PA_MODULE_USAGE("server=<address> source=<remote source name> cookie=<filename> format=<sample format> channels=<number of channels> rate=<sample rate> source_name=<name for the local source>")
  59 #endif
  60
  61 PA_MODULE_AUTHOR("Lennart Poettering")
  62 PA_MODULE_VERSION(PACKAGE_VERSION)
  63
  64 #define DEFAULT_SINK_NAME "tunnel"
  65 #define DEFAULT_SOURCE_NAME "tunnel"
  66
  67 #define DEFAULT_TLENGTH (44100*2*2/10)  //(10240*8)
  68 #define DEFAULT_MAXLENGTH ((DEFAULT_TLENGTH*3)/2)
  69 #define DEFAULT_MINREQ 512
  70 #define DEFAULT_PREBUF (DEFAULT_TLENGTH-DEFAULT_MINREQ)
  71 #define DEFAULT_FRAGSIZE 1024
  72
  73 #define DEFAULT_TIMEOUT 5
  74
  75 #define LATENCY_INTERVAL 10
  76
  77 static const char* const valid_modargs[] = {
  78     "server",
  79     "cookie",
  80     "format",
  81     "channels",
  82     "rate",
  83 #ifdef TUNNEL_SINK
  84     "sink_name",
  85     "sink",
  86 #else
  87     "source_name",
  88     "source",
  89 #endif
  90     NULL,
  91 };
  92
  93 static void command_stream_killed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
  94
  95 #ifdef TUNNEL_SINK
  96 static void command_request(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
  97 #endif
  98
  99 static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = {
 100 #ifdef TUNNEL_SINK
 101     [PA_COMMAND_REQUEST] = command_request,
 102 #endif
 103     [PA_COMMAND_PLAYBACK_STREAM_KILLED] = command_stream_killed,
 104     [PA_COMMAND_RECORD_STREAM_KILLED] = command_stream_killed
 105 };
 106
 107 struct userdata {
 108     pa_socket_client *client;
 109     pa_pstream *pstream;
 110     pa_pdispatch *pdispatch;
 111
 112     char *server_name;
 113 #ifdef TUNNEL_SINK
 114     char *sink_name;
 115     pa_sink *sink;
 116     uint32_t requested_bytes;
 117 #else
 118     char *source_name;
 119     pa_source *source;
 120 #endif
 121
 122     pa_module *module;
 123     pa_core *core;
 124
 125     uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
 126
 127     uint32_t version;
 128     uint32_t ctag;
 129     uint32_t device_index;
 130     uint32_t channel;
 131
 132     pa_usec_t host_latency;
 133
 134     pa_time_event *time_event;
 135
 136     int auth_cookie_in_property;
 137 };
 138
 139 static void close_stuff(struct userdata *u) {
 140     assert(u);
 141
 142     if (u->pstream) {
 143         pa_pstream_close(u->pstream);
 144         pa_pstream_unref(u->pstream);
 145         u->pstream = NULL;
 146     }
 147
 148     if (u->pdispatch) {
 149         pa_pdispatch_unref(u->pdispatch);
 150         u->pdispatch = NULL;
 151     }
 152
 153     if (u->client) {
 154         pa_socket_client_unref(u->client);
 155         u->client = NULL;
 156     }
 157
 158 #ifdef TUNNEL_SINK
 159     if (u->sink) {
 160         pa_sink_disconnect(u->sink);
 161         pa_sink_unref(u->sink);
 162         u->sink = NULL;
 163     }
 164 #else
 165     if (u->source) {
 166         pa_source_disconnect(u->source);
 167         pa_source_unref(u->source);
 168         u->source = NULL;
 169     }
 170 #endif
 171
 172     if (u->time_event) {
 173         u->core->mainloop->time_free(u->time_event);
 174         u->time_event = NULL;
 175     }
 176 }
 177
 178 static void die(struct userdata *u) {
 179     assert(u);
 180     close_stuff(u);
 181     pa_module_unload_request(u->module);
 182 }
 183
 184 static void command_stream_killed(pa_pdispatch *pd, PA_GCC_UNUSED uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 185     struct userdata *u = userdata;
 186     assert(pd && t && u && u->pdispatch == pd);
 187
 188     pa_log(__FILE__": stream killed");
 189     die(u);
 190 }
 191
 192 #ifdef TUNNEL_SINK
 193 static void send_prebuf_request(struct userdata *u) {
 194     pa_tagstruct *t;
 195
 196     t = pa_tagstruct_new(NULL, 0);
 197     pa_tagstruct_putu32(t, PA_COMMAND_PREBUF_PLAYBACK_STREAM);
 198     pa_tagstruct_putu32(t, u->ctag++);
 199     pa_tagstruct_putu32(t, u->channel);
 200     pa_pstream_send_tagstruct(u->pstream, t);
 201 }
 202
 203 static void send_bytes(struct userdata *u) {
 204     assert(u);
 205
 206     if (!u->pstream)
 207         return;
 208
 209     while (u->requested_bytes > 0) {
 210         pa_memchunk chunk;
 211         if (pa_sink_render(u->sink, u->requested_bytes, &chunk) < 0) {
 212
 213
 214             if (u->requested_bytes >= DEFAULT_TLENGTH-DEFAULT_PREBUF)
 215                 send_prebuf_request(u);
 216
 217             return;
 218         }
 219
 220         pa_pstream_send_memblock(u->pstream, u->channel, 0, PA_SEEK_RELATIVE, &chunk);
 221         pa_memblock_unref(chunk.memblock);
 222
 223         if (chunk.length > u->requested_bytes)
 224             u->requested_bytes = 0;
 225         else
 226             u->requested_bytes -= chunk.length;
 227     }
 228 }
 229
 230 static void command_request(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 231     struct userdata *u = userdata;
 232     uint32_t bytes, channel;
 233     assert(pd && command == PA_COMMAND_REQUEST && t && u && u->pdispatch == pd);
 234
 235     if (pa_tagstruct_getu32(t, &channel) < 0 ||
 236         pa_tagstruct_getu32(t, &bytes) < 0 ||
 237         !pa_tagstruct_eof(t)) {
 238         pa_log(__FILE__": invalid protocol reply");
 239         die(u);
 240         return;
 241     }
 242
 243     if (channel != u->channel) {
 244         pa_log(__FILE__": recieved data for invalid channel");
 245         die(u);
 246         return;
 247     }
 248
 249     u->requested_bytes += bytes;
 250     send_bytes(u);
 251 }
 252
 253 #endif
 254
 255 static void stream_get_latency_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 256     struct userdata *u = userdata;
 257     pa_usec_t buffer_usec, sink_usec, source_usec, transport_usec;
 258     int playing;
 259     uint32_t queue_length;
 260     int64_t write_index, read_index;
 261     struct timeval local, remote, now;
 262     assert(pd && u);
 263
 264     if (command != PA_COMMAND_REPLY) {
 265         if (command == PA_COMMAND_ERROR)
 266             pa_log(__FILE__": failed to get latency.");
 267         else
 268             pa_log(__FILE__": protocol error.");
 269         die(u);
 270         return;
 271     }
 272
 273     if (pa_tagstruct_get_usec(t, &buffer_usec) < 0 ||
 274         pa_tagstruct_get_usec(t, &sink_usec) < 0 ||
 275         pa_tagstruct_get_usec(t, &source_usec) < 0 ||
 276         pa_tagstruct_get_boolean(t, &playing) < 0 ||
 277         pa_tagstruct_getu32(t, &queue_length) < 0 ||
 278         pa_tagstruct_get_timeval(t, &local) < 0 ||
 279         pa_tagstruct_get_timeval(t, &remote) < 0 ||
 280         pa_tagstruct_gets64(t, &write_index) < 0 ||
 281         pa_tagstruct_gets64(t, &read_index) < 0 ||
 282         !pa_tagstruct_eof(t)) {
 283         pa_log(__FILE__": invalid reply.");
 284         die(u);
 285         return;
 286     }
 287
 288     pa_gettimeofday(&now);
 289
 290     if (pa_timeval_cmp(&local, &remote) < 0 && pa_timeval_cmp(&remote, &now)) {
 291         /* local and remote seem to have synchronized clocks */
 292 #ifdef TUNNEL_SINK
 293         transport_usec = pa_timeval_diff(&remote, &local);
 294 #else
 295         transport_usec = pa_timeval_diff(&now, &remote);
 296 #endif
 297     } else
 298         transport_usec = pa_timeval_diff(&now, &local)/2;
 299
 300 #ifdef TUNNEL_SINK
 301     u->host_latency = sink_usec + transport_usec;
 302 #else
 303     u->host_latency = source_usec + transport_usec;
 304     if (u->host_latency > sink_usec)
 305         u->host_latency -= sink_usec;
 306     else
 307         u->host_latency = 0;
 308 #endif
 309
 310 /*     pa_log(__FILE__": estimated host latency: %0.0f usec", (double) u->host_latency); */
 311 }
 312
 313 static void request_latency(struct userdata *u) {
 314     pa_tagstruct *t;
 315     struct timeval now;
 316     uint32_t tag;
 317     assert(u);
 318
 319     t = pa_tagstruct_new(NULL, 0);
 320 #ifdef TUNNEL_SINK
 321     pa_tagstruct_putu32(t, PA_COMMAND_GET_PLAYBACK_LATENCY);
 322 #else
 323     pa_tagstruct_putu32(t, PA_COMMAND_GET_RECORD_LATENCY);
 324 #endif
 325     pa_tagstruct_putu32(t, tag = u->ctag++);
 326     pa_tagstruct_putu32(t, u->channel);
 327
 328     pa_gettimeofday(&now);
 329     pa_tagstruct_put_timeval(t, &now);
 330
 331     pa_pstream_send_tagstruct(u->pstream, t);
 332     pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_callback, u);
 333 }
 334
 335 static void create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
 336     struct userdata *u = userdata;
 337     assert(pd && u && u->pdispatch == pd);
 338
 339     if (command != PA_COMMAND_REPLY) {
 340         if (command == PA_COMMAND_ERROR)
 341             pa_log(__FILE__": failed to create stream.");
 342         else
 343             pa_log(__FILE__": protocol error.");
 344         die(u);
 345         return;
 346     }
 347
 348     if (pa_tagstruct_getu32(t, &u->channel) < 0 ||
 349         pa_tagstruct_getu32(t, &u->device_index) < 0 ||
 350 #ifdef TUNNEL_SINK
 351         pa_tagstruct_getu32(t, &u->requested_bytes) < 0 ||
 352 #endif
 353         !pa_tagstruct_eof(t)) {
 354         pa_log(__FILE__": invalid reply.");
 355         die(u);
 356         return;
 357     }
 358
 359     request_latency(u);
 360 #ifdef TUNNEL_SINK
 361     send_bytes(u);
 362 #endif
 363 }
 364
 365 static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
 366     struct userdata *u = userdata;
 367     pa_tagstruct *reply;
 368     char name[256], un[128], hn[128];
 369 #ifdef TUNNEL_SINK
 370     pa_cvolume volume;
 371 #endif
 372     assert(pd && u && u->pdispatch == pd);
 373
 374     if (command != PA_COMMAND_REPLY ||
 375         pa_tagstruct_getu32(t, &u->version) < 0 ||
 376         !pa_tagstruct_eof(t)) {
 377         if (command == PA_COMMAND_ERROR)
 378             pa_log(__FILE__": failed to authenticate");
 379         else
 380             pa_log(__FILE__": protocol error.");
 381         die(u);
 382         return;
 383     }
 384
 385     /* Minimum supported protocol version */
 386     if (u->version < 8) {
 387         pa_log(__FILE__": incompatible protocol version");
 388         die(u);
 389         return;
 390     }
 391
 392 #ifdef TUNNEL_SINK
 393     snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', sink '%s'",
 394              pa_get_host_name(hn, sizeof(hn)),
 395              pa_get_user_name(un, sizeof(un)),
 396              u->sink->name);
 397 #else
 398     snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', source '%s'",
 399              pa_get_host_name(hn, sizeof(hn)),
 400              pa_get_user_name(un, sizeof(un)),
 401              u->source->name);
 402 #endif
 403
 404     reply = pa_tagstruct_new(NULL, 0);
 405     pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME);
 406     pa_tagstruct_putu32(reply, tag = u->ctag++);
 407     pa_tagstruct_puts(reply, name);
 408     pa_pstream_send_tagstruct(u->pstream, reply);
 409     /* We ignore the server's reply here */
 410
 411     reply = pa_tagstruct_new(NULL, 0);
 412 #ifdef TUNNEL_SINK
 413     pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM);
 414     pa_tagstruct_putu32(reply, tag = u->ctag++);
 415     pa_tagstruct_puts(reply, name);
 416     pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec);
 417     pa_tagstruct_put_channel_map(reply, &u->sink->channel_map);
 418     pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
 419     pa_tagstruct_puts(reply, u->sink_name);
 420     pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH);
 421     pa_tagstruct_put_boolean(reply, 0);
 422     pa_tagstruct_putu32(reply, DEFAULT_TLENGTH);
 423     pa_tagstruct_putu32(reply, DEFAULT_PREBUF);
 424     pa_tagstruct_putu32(reply, DEFAULT_MINREQ);
 425     pa_tagstruct_putu32(reply, 0);
 426     pa_cvolume_reset(&volume, u->sink->sample_spec.channels);
 427     pa_tagstruct_put_cvolume(reply, &volume);
 428 #else
 429     pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_RECORD_STREAM);
 430     pa_tagstruct_putu32(reply, tag = u->ctag++);
 431     pa_tagstruct_puts(reply, name);
 432     pa_tagstruct_put_sample_spec(reply, &u->source->sample_spec);
 433     pa_tagstruct_put_channel_map(reply, &u->source->channel_map);
 434     pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
 435     pa_tagstruct_puts(reply, u->source_name);
 436     pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH);
 437     pa_tagstruct_put_boolean(reply, 0);
 438     pa_tagstruct_putu32(reply, DEFAULT_FRAGSIZE);
 439 #endif
 440
 441     pa_pstream_send_tagstruct(u->pstream, reply);
 442     pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u);
 443 }
 444
 445 static void pstream_die_callback(pa_pstream *p, void *userdata) {
 446     struct userdata *u = userdata;
 447     assert(p && u);
 448
 449     pa_log(__FILE__": stream died.");
 450     die(u);
 451 }
 452
 453
 454 static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, const void*creds, void *userdata) {
 455     struct userdata *u = userdata;
 456     assert(p && packet && u);
 457
 458     if (pa_pdispatch_run(u->pdispatch, packet, creds, u) < 0) {
 459         pa_log(__FILE__": invalid packet");
 460         die(u);
 461     }
 462 }
 463
 464 #ifndef TUNNEL_SINK
 465 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) {
 466     struct userdata *u = userdata;
 467     assert(p && chunk && u);
 468
 469     if (channel != u->channel) {
 470         pa_log(__FILE__": recieved memory block on bad channel.");
 471         die(u);
 472         return;
 473     }
 474
 475     pa_source_post(u->source, chunk);
 476 }
 477 #endif
 478
 479 static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata) {
 480     struct userdata *u = userdata;
 481     pa_tagstruct *t;
 482     uint32_t tag;
 483     assert(sc && u && u->client == sc);
 484
 485     pa_socket_client_unref(u->client);
 486     u->client = NULL;
 487
 488     if (!io) {
 489         pa_log(__FILE__": connection failed.");
 490         pa_module_unload_request(u->module);
 491         return;
 492     }
 493
 494     u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->memblock_stat);
 495     u->pdispatch = pa_pdispatch_new(u->core->mainloop, command_table, PA_COMMAND_MAX);
 496
 497     pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u);
 498     pa_pstream_set_recieve_packet_callback(u->pstream, pstream_packet_callback, u);
 499 #ifndef TUNNEL_SINK
 500     pa_pstream_set_recieve_memblock_callback(u->pstream, pstream_memblock_callback, u);
 501 #endif
 502
 503     t = pa_tagstruct_new(NULL, 0);
 504     pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
 505     pa_tagstruct_putu32(t, tag = u->ctag++);
 506     pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION);
 507     pa_tagstruct_put_arbitrary(t, u->auth_cookie, sizeof(u->auth_cookie));
 508     pa_pstream_send_tagstruct(u->pstream, t);
 509     pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u);
 510
 511 }
 512
 513 #ifdef TUNNEL_SINK
 514 static void sink_notify(pa_sink*sink) {
 515     struct userdata *u;
 516     assert(sink && sink->userdata);
 517     u = sink->userdata;
 518
 519     send_bytes(u);
 520 }
 521
 522 static pa_usec_t sink_get_latency(pa_sink *sink) {
 523     struct userdata *u;
 524     uint32_t l;
 525     pa_usec_t usec = 0;
 526     assert(sink && sink->userdata);
 527     u = sink->userdata;
 528
 529     l = DEFAULT_TLENGTH;
 530
 531     if (l > u->requested_bytes) {
 532         l -= u->requested_bytes;
 533         usec += pa_bytes_to_usec(l, &u->sink->sample_spec);
 534     }
 535
 536     usec += u->host_latency;
 537
 538     return usec;
 539 }
 540 #else
 541 static pa_usec_t source_get_latency(pa_source *source) {
 542     struct userdata *u;
 543     assert(source && source->userdata);
 544     u = source->userdata;
 545
 546     return u->host_latency;
 547 }
 548 #endif
 549
 550 static void timeout_callback(pa_mainloop_api *m, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
 551     struct userdata *u = userdata;
 552     struct timeval ntv;
 553     assert(m && e && u);
 554
 555     request_latency(u);
 556
 557     pa_gettimeofday(&ntv);
 558     ntv.tv_sec += LATENCY_INTERVAL;
 559     m->time_restart(e, &ntv);
 560 }
 561
 562 static int load_key(struct userdata *u, const char*fn) {
 563     assert(u);
 564
 565     u->auth_cookie_in_property = 0;
 566
 567     if (!fn && pa_authkey_prop_get(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) {
 568         pa_log_debug(__FILE__": using already loaded auth cookie.");
 569         pa_authkey_prop_ref(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME);
 570         u->auth_cookie_in_property = 1;
 571         return 0;
 572     }
 573
 574     if (!fn)
 575         fn = PA_NATIVE_COOKIE_FILE;
 576
 577     if (pa_authkey_load_auto(fn, u->auth_cookie, sizeof(u->auth_cookie)) < 0)
 578         return -1;
 579
 580     pa_log_debug(__FILE__": loading cookie from disk.");
 581
 582     if (pa_authkey_prop_put(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0)
 583         u->auth_cookie_in_property = 1;
 584
 585     return 0;
 586 }
 587
 588 int pa__init(pa_core *c, pa_module*m) {
 589     pa_modargs *ma = NULL;
 590     struct userdata *u = NULL;
 591     pa_sample_spec ss;
 592     struct timeval ntv;
 593     assert(c && m);
 594
 595     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 596         pa_log(__FILE__": failed to parse module arguments");
 597         goto fail;
 598     }
 599
 600     u = pa_xmalloc(sizeof(struct userdata));
 601     m->userdata = u;
 602     u->module = m;
 603     u->core = c;
 604     u->client = NULL;
 605     u->pdispatch = NULL;
 606     u->pstream = NULL;
 607     u->server_name = NULL;
 608 #ifdef TUNNEL_SINK
 609     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));;
 610     u->sink = NULL;
 611     u->requested_bytes = 0;
 612 #else
 613     u->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));;
 614     u->source = NULL;
 615 #endif
 616     u->ctag = 1;
 617     u->device_index = u->channel = PA_INVALID_INDEX;
 618     u->host_latency = 0;
 619     u->auth_cookie_in_property = 0;
 620     u->time_event = NULL;
 621
 622     if (load_key(u, pa_modargs_get_value(ma, "cookie", NULL)) < 0)
 623         goto fail;
 624
 625     if (!(u->server_name = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL)))) {
 626         pa_log(__FILE__": no server specified.");
 627         goto fail;
 628     }
 629
 630     ss = c->default_sample_spec;
 631     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 632         pa_log(__FILE__": invalid sample format specification");
 633         goto fail;
 634     }
 635
 636     if (!(u->client = pa_socket_client_new_string(c->mainloop, u->server_name, PA_NATIVE_DEFAULT_PORT))) {
 637         pa_log(__FILE__": failed to connect to server '%s'", u->server_name);
 638         goto fail;
 639     }
 640
 641     if (!u->client)
 642         goto fail;
 643
 644     pa_socket_client_set_callback(u->client, on_connection, u);
 645
 646 #ifdef TUNNEL_SINK
 647     if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL))) {
 648         pa_log(__FILE__": failed to create sink.");
 649         goto fail;
 650     }
 651
 652     u->sink->notify = sink_notify;
 653     u->sink->get_latency = sink_get_latency;
 654     u->sink->userdata = u;
 655     u->sink->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->sink_name ? u->sink_name : "", u->sink_name ? "@" : "", u->server_name);
 656
 657     pa_sink_set_owner(u->sink, m);
 658 #else
 659     if (!(u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, NULL))) {
 660         pa_log(__FILE__": failed to create source.");
 661         goto fail;
 662     }
 663
 664     u->source->get_latency = source_get_latency;
 665     u->source->userdata = u;
 666     u->source->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->source_name ? u->source_name : "", u->source_name ? "@" : "", u->server_name);
 667
 668     pa_source_set_owner(u->source, m);
 669 #endif
 670
 671     pa_gettimeofday(&ntv);
 672     ntv.tv_sec += LATENCY_INTERVAL;
 673     u->time_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, u);
 674
 675     pa_modargs_free(ma);
 676
 677     return 0;
 678
 679 fail:
 680     pa__done(c, m);
 681
 682     if (ma)
 683         pa_modargs_free(ma);
 684     return  -1;
 685 }
 686
 687 void pa__done(pa_core *c, pa_module*m) {
 688     struct userdata* u;
 689     assert(c && m);
 690
 691     if (!(u = m->userdata))
 692         return;
 693
 694     close_stuff(u);
 695
 696     if (u->auth_cookie_in_property)
 697         pa_authkey_prop_unref(c, PA_NATIVE_COOKIE_PROPERTY_NAME);
 698
 699 #ifdef TUNNEL_SINK
 700     pa_xfree(u->sink_name);
 701 #else
 702     pa_xfree(u->source_name);
 703 #endif
 704     pa_xfree(u->server_name);
 705
 706     pa_xfree(u);
 707 }
 708
 709