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