code.delx.au - pulseaudio/blob - polyp/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 <regex.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34
  35 #include "module.h"
  36 #include "util.h"
  37 #include "modargs.h"
  38 #include "log.h"
  39 #include "subscribe.h"
  40 #include "xmalloc.h"
  41 #include "sink-input.h"
  42 #include "pdispatch.h"
  43 #include "pstream.h"
  44 #include "pstream-util.h"
  45 #include "authkey.h"
  46 #include "socket-client.h"
  47 #include "socket-util.h"
  48 #include "authkey-prop.h"
  49
  50 #ifdef TUNNEL_SINK
  51 #include "module-tunnel-sink-symdef.h"
  52 PA_MODULE_DESCRIPTION("Tunnel module for sinks")
  53 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>")
  54 #else
  55 #include "module-tunnel-source-symdef.h"
  56 PA_MODULE_DESCRIPTION("Tunnel module for sources")
  57 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>")
  58 #endif
  59
  60 PA_MODULE_AUTHOR("Lennart Poettering")
  61 PA_MODULE_VERSION(PACKAGE_VERSION)
  62
  63 #define PA_TYPEID_TUNNEL PA_TYPEID_MAKE('T', 'U', 'N', 'L')
  64
  65 #define DEFAULT_SINK_NAME "tunnel"
  66 #define DEFAULT_SOURCE_NAME "tunnel"
  67
  68 #define DEFAULT_TLENGTH (44100*2*2/10)  //(10240*8)
  69 #define DEFAULT_MAXLENGTH ((DEFAULT_TLENGTH*3)/2)
  70 #define DEFAULT_MINREQ 512
  71 #define DEFAULT_PREBUF (DEFAULT_TLENGTH-DEFAULT_MINREQ)
  72 #define DEFAULT_FRAGSIZE 1024
  73
  74 #define DEFAULT_TIMEOUT 5
  75
  76 #define LATENCY_INTERVAL 10
  77
  78 static const char* const valid_modargs[] = {
  79     "server",
  80     "cookie",
  81     "format",
  82     "channels",
  83     "rate",
  84 #ifdef TUNNEL_SINK
  85     "sink_name",
  86     "sink",
  87 #else
  88     "source_name",
  89     "source",
  90 #endif
  91     NULL,
  92 };
  93
  94 static void command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
  95
  96 #ifdef TUNNEL_SINK
  97 static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
  98 #endif
  99
 100 static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = {
 101 #ifdef TUNNEL_SINK
 102     [PA_COMMAND_REQUEST] = { command_request },
 103 #endif
 104     [PA_COMMAND_PLAYBACK_STREAM_KILLED] = { command_stream_killed },
 105     [PA_COMMAND_RECORD_STREAM_KILLED] = { command_stream_killed },
 106 };
 107
 108 struct userdata {
 109     struct pa_socket_client *client;
 110     struct pa_pstream *pstream;
 111     struct pa_pdispatch *pdispatch;
 112
 113     char *server_name;
 114 #ifdef TUNNEL_SINK
 115     char *sink_name;
 116     struct pa_sink *sink;
 117     uint32_t requested_bytes;
 118 #else
 119     char *source_name;
 120     struct pa_source *source;
 121 #endif
 122
 123     struct pa_module *module;
 124     struct pa_core *core;
 125
 126     uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
 127
 128     uint32_t ctag;
 129     uint32_t device_index;
 130     uint32_t channel;
 131
 132     pa_usec_t host_latency;
 133
 134     struct 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(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct 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\n");
 189     die(u);
 190 }
 191
 192 #ifdef TUNNEL_SINK
 193 static void send_prebuf_request(struct userdata *u) {
 194     struct 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         struct 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, &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(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct 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\n");
 239         die(u);
 240         return;
 241     }
 242
 243     if (channel != u->channel) {
 244         pa_log(__FILE__": recieved data for invalid channel\n");
 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(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct 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     uint64_t counter;
 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.\n");
 267         else
 268             pa_log(__FILE__": protocol error.\n");
 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_getu64(t, &counter) < 0 ||
 281         !pa_tagstruct_eof(t)) {
 282         pa_log(__FILE__": invalid reply.\n");
 283         die(u);
 284         return;
 285     }
 286
 287     gettimeofday(&now, NULL);
 288
 289     if (pa_timeval_cmp(&local, &remote) < 0 && pa_timeval_cmp(&remote, &now)) {
 290         /* local and remote seem to have synchronized clocks */
 291 #ifdef TUNNEL_SINK
 292         transport_usec = pa_timeval_diff(&remote, &local);
 293 #else
 294         transport_usec = pa_timeval_diff(&now, &remote);
 295 #endif
 296     } else
 297         transport_usec = pa_timeval_diff(&now, &local)/2;
 298
 299 #ifdef TUNNEL_SINK
 300     u->host_latency = sink_usec + transport_usec;
 301 #else
 302     u->host_latency = source_usec + transport_usec;
 303     if (u->host_latency > sink_usec)
 304         u->host_latency -= sink_usec;
 305     else
 306         u->host_latency = 0;
 307 #endif
 308
 309 /*     pa_log(__FILE__": estimated host latency: %0.0f usec\n", (double) u->host_latency); */
 310 }
 311
 312 static void request_latency(struct userdata *u) {
 313     struct pa_tagstruct *t;
 314     struct timeval now;
 315     uint32_t tag;
 316     assert(u);
 317
 318     t = pa_tagstruct_new(NULL, 0);
 319 #ifdef TUNNEL_SINK
 320     pa_tagstruct_putu32(t, PA_COMMAND_GET_PLAYBACK_LATENCY);
 321 #else
 322     pa_tagstruct_putu32(t, PA_COMMAND_GET_RECORD_LATENCY);
 323 #endif
 324     pa_tagstruct_putu32(t, tag = u->ctag++);
 325     pa_tagstruct_putu32(t, u->channel);
 326
 327     gettimeofday(&now, NULL);
 328     pa_tagstruct_put_timeval(t, &now);
 329     pa_tagstruct_putu64(t, 0);
 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(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct 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.\n");
 342         else
 343             pa_log(__FILE__": protocol error.\n");
 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.\n");
 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(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
 366     struct userdata *u = userdata;
 367     struct pa_tagstruct *reply;
 368     char name[256], un[128], hn[128];
 369     assert(pd && u && u->pdispatch == pd);
 370
 371     if (command != PA_COMMAND_REPLY || !pa_tagstruct_eof(t)) {
 372         if (command == PA_COMMAND_ERROR)
 373             pa_log(__FILE__": failed to authenticate\n");
 374         else
 375             pa_log(__FILE__": protocol error.\n");
 376         die(u);
 377         return;
 378     }
 379 #ifdef TUNNEL_SINK
 380     snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', sink '%s'",
 381              pa_get_host_name(hn, sizeof(hn)),
 382              pa_get_user_name(un, sizeof(un)),
 383              u->sink->name);
 384 #else
 385     snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', source '%s'",
 386              pa_get_host_name(hn, sizeof(hn)),
 387              pa_get_user_name(un, sizeof(un)),
 388              u->source->name);
 389 #endif
 390
 391     reply = pa_tagstruct_new(NULL, 0);
 392     pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME);
 393     pa_tagstruct_putu32(reply, tag = u->ctag++);
 394     pa_tagstruct_puts(reply, name);
 395     pa_pstream_send_tagstruct(u->pstream, reply);
 396     /* We ignore the server's reply here */
 397
 398     reply = pa_tagstruct_new(NULL, 0);
 399 #ifdef TUNNEL_SINK
 400     pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM);
 401     pa_tagstruct_putu32(reply, tag = u->ctag++);
 402     pa_tagstruct_puts(reply, name);
 403     pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec);
 404     pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
 405     pa_tagstruct_puts(reply, u->sink_name);
 406     pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH);
 407     pa_tagstruct_put_boolean(reply, 0);
 408     pa_tagstruct_putu32(reply, DEFAULT_TLENGTH);
 409     pa_tagstruct_putu32(reply, DEFAULT_PREBUF);
 410     pa_tagstruct_putu32(reply, DEFAULT_MINREQ);
 411     pa_tagstruct_putu32(reply, PA_VOLUME_NORM);
 412 #else
 413     pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_RECORD_STREAM);
 414     pa_tagstruct_putu32(reply, tag = u->ctag++);
 415     pa_tagstruct_puts(reply, name);
 416     pa_tagstruct_put_sample_spec(reply, &u->source->sample_spec);
 417     pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
 418     pa_tagstruct_puts(reply, u->source_name);
 419     pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH);
 420     pa_tagstruct_put_boolean(reply, 0);
 421     pa_tagstruct_putu32(reply, DEFAULT_FRAGSIZE);
 422 #endif
 423
 424     pa_pstream_send_tagstruct(u->pstream, reply);
 425     pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u);
 426 }
 427
 428 static void pstream_die_callback(struct pa_pstream *p, void *userdata) {
 429     struct userdata *u = userdata;
 430     assert(p && u);
 431
 432     pa_log(__FILE__": stream died.\n");
 433     die(u);
 434 }
 435
 436
 437 static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) {
 438     struct userdata *u = userdata;
 439     assert(p && packet && u);
 440
 441     if (pa_pdispatch_run(u->pdispatch, packet, u) < 0) {
 442         pa_log(__FILE__": invalid packet\n");
 443         die(u);
 444     }
 445 }
 446
 447 #ifndef TUNNEL_SINK
 448 static void pstream_memblock_callback(struct pa_pstream *p, uint32_t channel, uint32_t delta, const struct pa_memchunk *chunk, void *userdata) {
 449     struct userdata *u = userdata;
 450     assert(p && chunk && u);
 451
 452     if (channel != u->channel) {
 453         pa_log(__FILE__": recieved memory block on bad channel.\n");
 454         die(u);
 455         return;
 456     }
 457
 458     pa_source_post(u->source, chunk);
 459 }
 460 #endif
 461
 462 static void on_connection(struct pa_socket_client *sc, struct pa_iochannel *io, void *userdata) {
 463     struct userdata *u = userdata;
 464     struct pa_tagstruct *t;
 465     uint32_t tag;
 466     assert(sc && u && u->client == sc);
 467
 468     pa_socket_client_unref(u->client);
 469     u->client = NULL;
 470
 471     if (!io) {
 472         pa_log(__FILE__": connection failed.\n");
 473         pa_module_unload_request(u->module);
 474         return;
 475     }
 476
 477     u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->memblock_stat);
 478     u->pdispatch = pa_pdispatch_new(u->core->mainloop, command_table, PA_COMMAND_MAX);
 479
 480     pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u);
 481     pa_pstream_set_recieve_packet_callback(u->pstream, pstream_packet_callback, u);
 482 #ifndef TUNNEL_SINK
 483     pa_pstream_set_recieve_memblock_callback(u->pstream, pstream_memblock_callback, u);
 484 #endif
 485
 486     t = pa_tagstruct_new(NULL, 0);
 487     pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
 488     pa_tagstruct_putu32(t, tag = u->ctag++);
 489     pa_tagstruct_put_arbitrary(t, u->auth_cookie, sizeof(u->auth_cookie));
 490     pa_pstream_send_tagstruct(u->pstream, t);
 491     pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u);
 492
 493 }
 494
 495 #ifdef TUNNEL_SINK
 496 static void sink_notify(struct pa_sink*sink) {
 497     struct userdata *u;
 498     assert(sink && sink->userdata);
 499     u = sink->userdata;
 500
 501     send_bytes(u);
 502 }
 503
 504 static pa_usec_t sink_get_latency(struct pa_sink *sink) {
 505     struct userdata *u;
 506     uint32_t l;
 507     pa_usec_t usec = 0;
 508     assert(sink && sink->userdata);
 509     u = sink->userdata;
 510
 511     l = DEFAULT_TLENGTH;
 512
 513     if (l > u->requested_bytes) {
 514         l -= u->requested_bytes;
 515         usec += pa_bytes_to_usec(l, &u->sink->sample_spec);
 516     }
 517
 518     usec += u->host_latency;
 519
 520     return usec;
 521 }
 522 #else
 523 static pa_usec_t source_get_latency(struct pa_source *source) {
 524     struct userdata *u;
 525     assert(source && source->userdata);
 526     u = source->userdata;
 527
 528     return u->host_latency;
 529 }
 530 #endif
 531
 532 static void timeout_callback(struct pa_mainloop_api *m, struct pa_time_event*e, const struct timeval *tv, void *userdata) {
 533     struct userdata *u = userdata;
 534     struct timeval ntv;
 535     assert(m && e && u);
 536
 537     request_latency(u);
 538
 539     gettimeofday(&ntv, NULL);
 540     ntv.tv_sec += LATENCY_INTERVAL;
 541     m->time_restart(e, &ntv);
 542 }
 543
 544 static int load_key(struct userdata *u, const char*fn) {
 545     assert(u);
 546
 547     u->auth_cookie_in_property = 0;
 548
 549     if (!fn && pa_authkey_prop_get(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) {
 550         pa_log_debug(__FILE__": using already loaded auth cookie.\n");
 551         pa_authkey_prop_ref(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME);
 552         u->auth_cookie_in_property = 1;
 553         return 0;
 554     }
 555
 556     if (!fn)
 557         fn = PA_NATIVE_COOKIE_FILE;
 558
 559     if (pa_authkey_load_auto(fn, u->auth_cookie, sizeof(u->auth_cookie)) < 0)
 560         return -1;
 561
 562     pa_log_debug(__FILE__": loading cookie from disk.\n");
 563
 564     if (pa_authkey_prop_put(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0)
 565         u->auth_cookie_in_property = 1;
 566
 567     return 0;
 568 }
 569
 570 int pa__init(struct pa_core *c, struct pa_module*m) {
 571     struct pa_modargs *ma = NULL;
 572     struct userdata *u = NULL;
 573     struct pa_sample_spec ss;
 574     struct timeval ntv;
 575     assert(c && m);
 576
 577     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 578         pa_log(__FILE__": failed to parse module arguments\n");
 579         goto fail;
 580     }
 581
 582     u = pa_xmalloc(sizeof(struct userdata));
 583     m->userdata = u;
 584     u->module = m;
 585     u->core = c;
 586     u->client = NULL;
 587     u->pdispatch = NULL;
 588     u->pstream = NULL;
 589     u->server_name = NULL;
 590 #ifdef TUNNEL_SINK
 591     u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));;
 592     u->sink = NULL;
 593     u->requested_bytes = 0;
 594 #else
 595     u->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));;
 596     u->source = NULL;
 597 #endif
 598     u->ctag = 1;
 599     u->device_index = u->channel = PA_INVALID_INDEX;
 600     u->host_latency = 0;
 601     u->auth_cookie_in_property = 0;
 602     u->time_event = NULL;
 603
 604     if (load_key(u, pa_modargs_get_value(ma, "cookie", NULL)) < 0)
 605         goto fail;
 606
 607     if (!(u->server_name = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL)))) {
 608         pa_log(__FILE__": no server specified.\n");
 609         goto fail;
 610     }
 611
 612     ss = c->default_sample_spec;
 613     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 614         pa_log(__FILE__": invalid sample format specification\n");
 615         goto fail;
 616     }
 617
 618     if (!(u->client = pa_socket_client_new_string(c->mainloop, u->server_name, PA_NATIVE_DEFAULT_PORT))) {
 619         pa_log(__FILE__": failed to connect to server '%s'\n", u->server_name);
 620         goto fail;
 621     }
 622
 623     if (!u->client)
 624         goto fail;
 625
 626     pa_socket_client_set_callback(u->client, on_connection, u);
 627
 628 #ifdef TUNNEL_SINK
 629     if (!(u->sink = pa_sink_new(c, PA_TYPEID_TUNNEL, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) {
 630         pa_log(__FILE__": failed to create sink.\n");
 631         goto fail;
 632     }
 633
 634     u->sink->notify = sink_notify;
 635     u->sink->get_latency = sink_get_latency;
 636     u->sink->userdata = u;
 637     u->sink->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->sink_name ? u->sink_name : "", u->sink_name ? "@" : "", u->server_name);
 638
 639     pa_sink_set_owner(u->sink, m);
 640 #else
 641     if (!(u->source = pa_source_new(c, PA_TYPEID_TUNNEL, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss))) {
 642         pa_log(__FILE__": failed to create source.\n");
 643         goto fail;
 644     }
 645
 646     u->source->get_latency = source_get_latency;
 647     u->source->userdata = u;
 648     u->source->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->source_name ? u->source_name : "", u->source_name ? "@" : "", u->server_name);
 649
 650     pa_source_set_owner(u->source, m);
 651 #endif
 652
 653     gettimeofday(&ntv, NULL);
 654     ntv.tv_sec += LATENCY_INTERVAL;
 655     u->time_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, u);
 656
 657     pa_modargs_free(ma);
 658
 659     return 0;
 660
 661 fail:
 662     pa__done(c, m);
 663
 664     if (ma)
 665         pa_modargs_free(ma);
 666     return  -1;
 667 }
 668
 669 void pa__done(struct pa_core *c, struct pa_module*m) {
 670     struct userdata* u;
 671     assert(c && m);
 672
 673     if (!(u = m->userdata))
 674         return;
 675
 676     close_stuff(u);
 677
 678     if (u->auth_cookie_in_property)
 679         pa_authkey_prop_unref(c, PA_NATIVE_COOKIE_PROPERTY_NAME);
 680
 681 #ifdef TUNNEL_SINK
 682     pa_xfree(u->sink_name);
 683 #else
 684     pa_xfree(u->source_name);
 685 #endif
 686     pa_xfree(u->server_name);
 687
 688     pa_xfree(u);
 689 }
 690
 691