code.delx.au - pulseaudio/blob - src/pulsecore/protocol-http.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2005-2009 Lennart Poettering
   5
   6   PulseAudio 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 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio 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 PulseAudio; 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 <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <errno.h>
  30
  31 #include <pulse/util.h>
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/timeval.h>
  34
  35 #include <pulsecore/core-util.h>
  36 #include <pulsecore/ioline.h>
  37 #include <pulsecore/thread-mq.h>
  38 #include <pulsecore/macro.h>
  39 #include <pulsecore/log.h>
  40 #include <pulsecore/namereg.h>
  41 #include <pulsecore/cli-text.h>
  42 #include <pulsecore/shared.h>
  43 #include <pulsecore/core-error.h>
  44 #include <pulsecore/mime-type.h>
  45
  46 #include "protocol-http.h"
  47
  48 /* Don't allow more than this many concurrent connections */
  49 #define MAX_CONNECTIONS 10
  50
  51 #define URL_ROOT "/"
  52 #define URL_CSS "/style"
  53 #define URL_STATUS "/status"
  54 #define URL_LISTEN "/listen"
  55 #define URL_LISTEN_SOURCE "/listen/source/"
  56
  57 #define MIME_HTML "text/html; charset=utf-8"
  58 #define MIME_TEXT "text/plain; charset=utf-8"
  59 #define MIME_CSS "text/css"
  60
  61 #define HTML_HEADER(t)                                                  \
  62     "<?xml version=\"1.0\"?>\n"                                         \
  63     "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" \
  64     "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"                   \
  65     "        <head>\n"                                                  \
  66     "                <title>"t"</title>\n"                              \
  67     "                <link rel=\"stylesheet\" type=\"text/css\" href=\"style\"/>\n" \
  68     "        </head>\n"                                                 \
  69     "        <body>\n"
  70
  71 #define HTML_FOOTER                                                     \
  72     "        </body>\n"                                                 \
  73     "</html>\n"
  74
  75 #define RECORD_BUFFER_SECONDS (5)
  76 #define DEFAULT_SOURCE_LATENCY (300*PA_USEC_PER_MSEC)
  77
  78 enum state {
  79     STATE_REQUEST_LINE,
  80     STATE_MIME_HEADER,
  81     STATE_DATA
  82 };
  83
  84 enum method {
  85     METHOD_GET,
  86     METHOD_HEAD
  87 };
  88
  89 struct connection {
  90     pa_http_protocol *protocol;
  91     pa_iochannel *io;
  92     pa_ioline *line;
  93     pa_memblockq *output_memblockq;
  94     pa_source_output *source_output;
  95     pa_client *client;
  96     enum state state;
  97     char *url;
  98     enum method method;
  99     pa_module *module;
 100 };
 101
 102 struct pa_http_protocol {
 103     PA_REFCNT_DECLARE;
 104
 105     pa_core *core;
 106     pa_idxset *connections;
 107
 108     pa_strlist *servers;
 109 };
 110
 111 enum {
 112     SOURCE_OUTPUT_MESSAGE_POST_DATA = PA_SOURCE_OUTPUT_MESSAGE_MAX
 113 };
 114
 115 /* Called from main context */
 116 static void connection_unlink(struct connection *c) {
 117     pa_assert(c);
 118
 119     if (c->source_output) {
 120         pa_source_output_unlink(c->source_output);
 121         c->source_output->userdata = NULL;
 122         pa_source_output_unref(c->source_output);
 123     }
 124
 125     if (c->client)
 126         pa_client_free(c->client);
 127
 128     pa_xfree(c->url);
 129
 130     if (c->line)
 131         pa_ioline_unref(c->line);
 132
 133     if (c->io)
 134         pa_iochannel_free(c->io);
 135
 136     if (c->output_memblockq)
 137         pa_memblockq_free(c->output_memblockq);
 138
 139     pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
 140
 141     pa_xfree(c);
 142 }
 143
 144 /* Called from main context */
 145 static int do_write(struct connection *c) {
 146     pa_memchunk chunk;
 147     ssize_t r;
 148     void *p;
 149
 150     pa_assert(c);
 151
 152     if (pa_memblockq_peek(c->output_memblockq, &chunk) < 0)
 153         return 0;
 154
 155     pa_assert(chunk.memblock);
 156     pa_assert(chunk.length > 0);
 157
 158     p = pa_memblock_acquire(chunk.memblock);
 159     r = pa_iochannel_write(c->io, (uint8_t*) p+chunk.index, chunk.length);
 160     pa_memblock_release(chunk.memblock);
 161
 162     pa_memblock_unref(chunk.memblock);
 163
 164     if (r < 0) {
 165
 166         if (errno == EINTR || errno == EAGAIN)
 167             return 0;
 168
 169         pa_log("write(): %s", pa_cstrerror(errno));
 170         return -1;
 171     }
 172
 173     pa_memblockq_drop(c->output_memblockq, (size_t) r);
 174
 175     return 0;
 176 }
 177
 178 /* Called from main context */
 179 static void do_work(struct connection *c) {
 180     pa_assert(c);
 181
 182     if (pa_iochannel_is_hungup(c->io))
 183         goto fail;
 184
 185     if (pa_iochannel_is_writable(c->io))
 186         if (do_write(c) < 0)
 187             goto fail;
 188
 189     return;
 190
 191 fail:
 192     connection_unlink(c);
 193 }
 194
 195 /* Called from thread context, except when it is not */
 196 static int source_output_process_msg(pa_msgobject *m, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
 197     pa_source_output *o = PA_SOURCE_OUTPUT(m);
 198     struct connection *c;
 199
 200     pa_source_output_assert_ref(o);
 201
 202     if (!(c = o->userdata))
 203         return -1;
 204
 205     switch (code) {
 206
 207         case SOURCE_OUTPUT_MESSAGE_POST_DATA:
 208             /* While this function is usually called from IO thread
 209              * context, this specific command is not! */
 210             pa_memblockq_push_align(c->output_memblockq, chunk);
 211             do_work(c);
 212             break;
 213
 214         default:
 215             return pa_source_output_process_msg(m, code, userdata, offset, chunk);
 216     }
 217
 218     return 0;
 219 }
 220
 221 /* Called from thread context */
 222 static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
 223     struct connection *c;
 224
 225     pa_source_output_assert_ref(o);
 226     pa_assert_se(c = o->userdata);
 227     pa_assert(chunk);
 228
 229     pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(o), SOURCE_OUTPUT_MESSAGE_POST_DATA, NULL, 0, chunk, NULL);
 230 }
 231
 232 /* Called from main context */
 233 static void source_output_kill_cb(pa_source_output *o) {
 234     struct connection*c;
 235
 236     pa_source_output_assert_ref(o);
 237     pa_assert_se(c = o->userdata);
 238
 239     connection_unlink(c);
 240 }
 241
 242 /* Called from main context */
 243 static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
 244     struct connection*c;
 245
 246     pa_source_output_assert_ref(o);
 247     pa_assert_se(c = o->userdata);
 248
 249     return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
 250 }
 251
 252 /*** client callbacks ***/
 253 static void client_kill_cb(pa_client *client) {
 254     struct connection*c;
 255
 256     pa_assert(client);
 257     pa_assert_se(c = client->userdata);
 258
 259     connection_unlink(c);
 260 }
 261
 262 /*** pa_iochannel callbacks ***/
 263 static void io_callback(pa_iochannel*io, void *userdata) {
 264     struct connection *c = userdata;
 265
 266     pa_assert(c);
 267     pa_assert(io);
 268
 269     do_work(c);
 270 }
 271
 272 static char *escape_html(const char *t) {
 273     pa_strbuf *sb;
 274     const char *p, *e;
 275
 276     sb = pa_strbuf_new();
 277
 278     for (e = p = t; *p; p++) {
 279
 280         if (*p == '>' || *p == '<' || *p == '&') {
 281
 282             if (p > e) {
 283                 pa_strbuf_putsn(sb, e, p-e);
 284                 e = p + 1;
 285             }
 286
 287             if (*p == '>')
 288                 pa_strbuf_puts(sb, "&gt;");
 289             else if (*p == '<')
 290                 pa_strbuf_puts(sb, "&lt;");
 291             else
 292                 pa_strbuf_puts(sb, "&amp;");
 293         }
 294     }
 295
 296     if (p > e)
 297         pa_strbuf_putsn(sb, e, p-e);
 298
 299     return pa_strbuf_tostring_free(sb);
 300 }
 301
 302 static void http_response(
 303         struct connection *c,
 304         int code,
 305         const char *msg,
 306         const char *mime) {
 307
 308     char *s;
 309
 310     pa_assert(c);
 311     pa_assert(msg);
 312     pa_assert(mime);
 313
 314     s = pa_sprintf_malloc(
 315             "HTTP/1.0 %i %s\n"
 316             "Connection: close\n"
 317             "Content-Type: %s\n"
 318             "Cache-Control: no-cache\n"
 319             "Expires: 0\n"
 320             "Server: "PACKAGE_NAME"/"PACKAGE_VERSION"\n"
 321             "\n", code, msg, mime);
 322     pa_ioline_puts(c->line, s);
 323     pa_xfree(s);
 324 }
 325
 326 static void html_response(
 327         struct connection *c,
 328         int code,
 329         const char *msg,
 330         const char *text) {
 331
 332     char *s;
 333     pa_assert(c);
 334
 335     http_response(c, code, msg, MIME_HTML);
 336
 337     if (c->method == METHOD_HEAD) {
 338         pa_ioline_defer_close(c->line);
 339         return;
 340     }
 341
 342     if (!text)
 343         text = msg;
 344
 345     s = pa_sprintf_malloc(
 346             HTML_HEADER("%s")
 347             "%s"
 348             HTML_FOOTER,
 349             text, text);
 350
 351     pa_ioline_puts(c->line, s);
 352     pa_xfree(s);
 353
 354     pa_ioline_defer_close(c->line);
 355 }
 356
 357 static void html_print_field(pa_ioline *line, const char *left, const char *right) {
 358     char *eleft, *eright;
 359
 360     eleft = escape_html(left);
 361     eright = escape_html(right);
 362
 363     pa_ioline_printf(line,
 364                      "<tr><td><b>%s</b></td>"
 365                      "<td>%s</td></tr>\n", eleft, eright);
 366
 367     pa_xfree(eleft);
 368     pa_xfree(eright);
 369 }
 370
 371 static void handle_root(struct connection *c) {
 372     char *t;
 373
 374     pa_assert(c);
 375
 376     http_response(c, 200, "OK", MIME_HTML);
 377
 378     if (c->method == METHOD_HEAD) {
 379         pa_ioline_defer_close(c->line);
 380         return;
 381     }
 382
 383     pa_ioline_puts(c->line,
 384                    HTML_HEADER(PACKAGE_NAME" "PACKAGE_VERSION)
 385                    "<h1>"PACKAGE_NAME" "PACKAGE_VERSION"</h1>\n"
 386                    "<table>\n");
 387
 388     t = pa_get_user_name_malloc();
 389     html_print_field(c->line, "User Name:", t);
 390     pa_xfree(t);
 391
 392     t = pa_get_host_name_malloc();
 393     html_print_field(c->line, "Host name:", t);
 394     pa_xfree(t);
 395
 396     t = pa_machine_id();
 397     html_print_field(c->line, "Machine ID:", t);
 398     pa_xfree(t);
 399
 400     t = pa_uname_string();
 401     html_print_field(c->line, "System:", t);
 402     pa_xfree(t);
 403
 404     t = pa_sprintf_malloc("%lu", (unsigned long) getpid());
 405     html_print_field(c->line, "Process ID:", t);
 406     pa_xfree(t);
 407
 408     pa_ioline_puts(c->line,
 409                    "</table>\n"
 410                    "<p><a href=\"" URL_STATUS "\">Show an extensive server status report</a></p>\n"
 411                    "<p><a href=\"" URL_LISTEN "\">Monitor sinks and sources</a></p>\n"
 412                    HTML_FOOTER);
 413
 414     pa_ioline_defer_close(c->line);
 415 }
 416
 417 static void handle_css(struct connection *c) {
 418     pa_assert(c);
 419
 420     http_response(c, 200, "OK", MIME_CSS);
 421
 422     if (c->method == METHOD_HEAD) {
 423         pa_ioline_defer_close(c->line);
 424         return;
 425     }
 426
 427     pa_ioline_puts(c->line,
 428                    "body { color: black; background-color: white; }\n"
 429                    "a:link, a:visited { color: #900000; }\n"
 430                    "div.news-date { font-size: 80%; font-style: italic; }\n"
 431                    "pre { background-color: #f0f0f0; padding: 0.4cm; }\n"
 432                    ".grey { color: #8f8f8f; font-size: 80%; }"
 433                    "table {  margin-left: 1cm; border:1px solid lightgrey; padding: 0.2cm; }\n"
 434                    "td { padding-left:10px; padding-right:10px; }\n");
 435
 436     pa_ioline_defer_close(c->line);
 437 }
 438
 439 static void handle_status(struct connection *c) {
 440     char *r;
 441
 442     pa_assert(c);
 443
 444     http_response(c, 200, "OK", MIME_TEXT);
 445
 446     if (c->method == METHOD_HEAD) {
 447         pa_ioline_defer_close(c->line);
 448         return;
 449     }
 450
 451     r = pa_full_status_string(c->protocol->core);
 452     pa_ioline_puts(c->line, r);
 453     pa_xfree(r);
 454
 455     pa_ioline_defer_close(c->line);
 456 }
 457
 458 static void handle_listen(struct connection *c) {
 459     pa_source *source;
 460     pa_sink *sink;
 461     uint32_t idx;
 462
 463     http_response(c, 200, "OK", MIME_HTML);
 464
 465     pa_ioline_puts(c->line,
 466                    HTML_HEADER("Listen")
 467                    "<h2>Sinks</h2>\n"
 468                    "<p>\n");
 469
 470     if (c->method == METHOD_HEAD) {
 471         pa_ioline_defer_close(c->line);
 472         return;
 473     }
 474
 475     PA_IDXSET_FOREACH(sink, c->protocol->core->sinks, idx) {
 476         char *t, *m;
 477
 478         t = escape_html(pa_strna(pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
 479         m = pa_sample_spec_to_mime_type_mimefy(&sink->sample_spec, &sink->channel_map);
 480
 481         pa_ioline_printf(c->line,
 482                          "<a href=\"" URL_LISTEN_SOURCE "%s\" title=\"%s\">%s</a><br/>\n",
 483                          sink->monitor_source->name, m, t);
 484
 485         pa_xfree(t);
 486         pa_xfree(m);
 487     }
 488
 489     pa_ioline_puts(c->line,
 490                    "</p>\n"
 491                    "<h2>Sources</h2>\n"
 492                    "<p>\n");
 493
 494     PA_IDXSET_FOREACH(source, c->protocol->core->sources, idx) {
 495         char *t, *m;
 496
 497         if (source->monitor_of)
 498             continue;
 499
 500         t = escape_html(pa_strna(pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION)));
 501         m = pa_sample_spec_to_mime_type_mimefy(&source->sample_spec, &source->channel_map);
 502
 503         pa_ioline_printf(c->line,
 504                          "<a href=\"" URL_LISTEN_SOURCE "%s\" title=\"%s\">%s</a><br/>\n",
 505                          source->name, m, t);
 506
 507         pa_xfree(m);
 508         pa_xfree(t);
 509
 510     }
 511
 512     pa_ioline_puts(c->line,
 513                    "</p>\n"
 514                    HTML_FOOTER);
 515
 516     pa_ioline_defer_close(c->line);
 517 }
 518
 519 static void line_drain_callback(pa_ioline *l, void *userdata) {
 520     struct connection *c;
 521
 522     pa_assert(l);
 523     pa_assert_se(c = userdata);
 524
 525     /* We don't need the line reader anymore, instead we need a real
 526      * binary io channel */
 527     pa_assert_se(c->io = pa_ioline_detach_iochannel(c->line));
 528     pa_iochannel_set_callback(c->io, io_callback, c);
 529
 530     pa_iochannel_socket_set_sndbuf(c->io, pa_memblockq_get_length(c->output_memblockq));
 531
 532     pa_ioline_unref(c->line);
 533     c->line = NULL;
 534 }
 535
 536 static void handle_listen_prefix(struct connection *c, const char *source_name) {
 537     pa_source *source;
 538     pa_source_output_new_data data;
 539     pa_sample_spec ss;
 540     pa_channel_map cm;
 541     char *t;
 542     size_t l;
 543
 544     pa_assert(c);
 545     pa_assert(source_name);
 546
 547     pa_assert(c->line);
 548     pa_assert(!c->io);
 549
 550     if (!(source = pa_namereg_get(c->protocol->core, source_name, PA_NAMEREG_SOURCE))) {
 551         html_response(c, 404, "Source not found", NULL);
 552         return;
 553     }
 554
 555     ss = source->sample_spec;
 556     cm = source->channel_map;
 557
 558     pa_sample_spec_mimefy(&ss, &cm);
 559
 560     pa_source_output_new_data_init(&data);
 561     data.driver = __FILE__;
 562     data.module = c->module;
 563     data.client = c->client;
 564     pa_source_output_new_data_set_source(&data, source, FALSE);
 565     pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
 566     pa_source_output_new_data_set_sample_spec(&data, &ss);
 567     pa_source_output_new_data_set_channel_map(&data, &cm);
 568
 569     pa_source_output_new(&c->source_output, c->protocol->core, &data);
 570     pa_source_output_new_data_done(&data);
 571
 572     if (!c->source_output) {
 573         html_response(c, 403, "Cannot create source output", NULL);
 574         return;
 575     }
 576
 577     c->source_output->parent.process_msg = source_output_process_msg;
 578     c->source_output->push = source_output_push_cb;
 579     c->source_output->kill = source_output_kill_cb;
 580     c->source_output->get_latency = source_output_get_latency_cb;
 581     c->source_output->userdata = c;
 582
 583     pa_source_output_set_requested_latency(c->source_output, DEFAULT_SOURCE_LATENCY);
 584
 585     l = (size_t) (pa_bytes_per_second(&ss)*RECORD_BUFFER_SECONDS);
 586     c->output_memblockq = pa_memblockq_new(
 587             0,
 588             l,
 589             0,
 590             pa_frame_size(&ss),
 591             1,
 592             0,
 593             0,
 594             NULL);
 595
 596     pa_source_output_put(c->source_output);
 597
 598     t = pa_sample_spec_to_mime_type(&ss, &cm);
 599     http_response(c, 200, "OK", t);
 600     pa_xfree(t);
 601
 602     if(c->method == METHOD_HEAD) {
 603         connection_unlink(c);
 604         return;
 605     }
 606     pa_ioline_set_callback(c->line, NULL, NULL);
 607
 608     if (pa_ioline_is_drained(c->line))
 609         line_drain_callback(c->line, c);
 610     else
 611         pa_ioline_set_drain_callback(c->line, line_drain_callback, c);
 612 }
 613
 614 static void handle_url(struct connection *c) {
 615     pa_assert(c);
 616
 617     pa_log_debug("Request for %s", c->url);
 618
 619     if (pa_streq(c->url, URL_ROOT))
 620         handle_root(c);
 621     else if (pa_streq(c->url, URL_CSS))
 622         handle_css(c);
 623     else if (pa_streq(c->url, URL_STATUS))
 624         handle_status(c);
 625     else if (pa_streq(c->url, URL_LISTEN))
 626         handle_listen(c);
 627     else if (pa_startswith(c->url, URL_LISTEN_SOURCE))
 628         handle_listen_prefix(c, c->url + sizeof(URL_LISTEN_SOURCE)-1);
 629     else
 630         html_response(c, 404, "Not Found", NULL);
 631 }
 632
 633 static void line_callback(pa_ioline *line, const char *s, void *userdata) {
 634     struct connection *c = userdata;
 635     pa_assert(line);
 636     pa_assert(c);
 637
 638     if (!s) {
 639         /* EOF */
 640         connection_unlink(c);
 641         return;
 642     }
 643
 644     switch (c->state) {
 645         case STATE_REQUEST_LINE: {
 646             if (pa_startswith(s, "GET ")) {
 647                 c->method = METHOD_GET;
 648                 s +=4;
 649             } else if (pa_startswith(s, "HEAD ")) {
 650                 c->method = METHOD_HEAD;
 651                 s +=5;
 652             } else {
 653                 goto fail;
 654             }
 655
 656             c->url = pa_xstrndup(s, strcspn(s, " \r\n\t?"));
 657             c->state = STATE_MIME_HEADER;
 658             break;
 659         }
 660
 661         case STATE_MIME_HEADER: {
 662
 663             /* Ignore MIME headers */
 664             if (strcspn(s, " \r\n") != 0)
 665                 break;
 666
 667             /* We're done */
 668             c->state = STATE_DATA;
 669
 670             handle_url(c);
 671             break;
 672         }
 673
 674         default:
 675             ;
 676     }
 677
 678     return;
 679
 680 fail:
 681     html_response(c, 500, "Internal Server Error", NULL);
 682 }
 683
 684 void pa_http_protocol_connect(pa_http_protocol *p, pa_iochannel *io, pa_module *m) {
 685     struct connection *c;
 686     pa_client_new_data client_data;
 687     char pname[128];
 688
 689     pa_assert(p);
 690     pa_assert(io);
 691     pa_assert(m);
 692
 693     if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
 694         pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
 695         pa_iochannel_free(io);
 696         return;
 697     }
 698
 699     c = pa_xnew0(struct connection, 1);
 700     c->protocol = p;
 701     c->state = STATE_REQUEST_LINE;
 702     c->module = m;
 703
 704     c->line = pa_ioline_new(io);
 705     pa_ioline_set_callback(c->line, line_callback, c);
 706
 707     pa_client_new_data_init(&client_data);
 708     client_data.module = c->module;
 709     client_data.driver = __FILE__;
 710     pa_iochannel_socket_peer_to_string(io, pname, sizeof(pname));
 711     pa_proplist_setf(client_data.proplist, PA_PROP_APPLICATION_NAME, "HTTP client (%s)", pname);
 712     pa_proplist_sets(client_data.proplist, "http-protocol.peer", pname);
 713     c->client = pa_client_new(p->core, &client_data);
 714     pa_client_new_data_done(&client_data);
 715
 716     if (!c->client)
 717         goto fail;
 718
 719     c->client->kill = client_kill_cb;
 720     c->client->userdata = c;
 721
 722     pa_idxset_put(p->connections, c, NULL);
 723
 724     return;
 725
 726 fail:
 727     if (c)
 728         connection_unlink(c);
 729 }
 730
 731 void pa_http_protocol_disconnect(pa_http_protocol *p, pa_module *m) {
 732     struct connection *c;
 733     uint32_t idx;
 734
 735     pa_assert(p);
 736     pa_assert(m);
 737
 738     PA_IDXSET_FOREACH(c, p->connections, idx)
 739         if (c->module == m)
 740             connection_unlink(c);
 741 }
 742
 743 static pa_http_protocol* http_protocol_new(pa_core *c) {
 744     pa_http_protocol *p;
 745
 746     pa_assert(c);
 747
 748     p = pa_xnew0(pa_http_protocol, 1);
 749     PA_REFCNT_INIT(p);
 750     p->core = c;
 751     p->connections = pa_idxset_new(NULL, NULL);
 752
 753     pa_assert_se(pa_shared_set(c, "http-protocol", p) >= 0);
 754
 755     return p;
 756 }
 757
 758 pa_http_protocol* pa_http_protocol_get(pa_core *c) {
 759     pa_http_protocol *p;
 760
 761     if ((p = pa_shared_get(c, "http-protocol")))
 762         return pa_http_protocol_ref(p);
 763
 764     return http_protocol_new(c);
 765 }
 766
 767 pa_http_protocol* pa_http_protocol_ref(pa_http_protocol *p) {
 768     pa_assert(p);
 769     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 770
 771     PA_REFCNT_INC(p);
 772
 773     return p;
 774 }
 775
 776 void pa_http_protocol_unref(pa_http_protocol *p) {
 777     struct connection *c;
 778
 779     pa_assert(p);
 780     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 781
 782     if (PA_REFCNT_DEC(p) > 0)
 783         return;
 784
 785     while ((c = pa_idxset_first(p->connections, NULL)))
 786         connection_unlink(c);
 787
 788     pa_idxset_free(p->connections, NULL, NULL);
 789
 790     pa_strlist_free(p->servers);
 791
 792     pa_assert_se(pa_shared_remove(p->core, "http-protocol") >= 0);
 793
 794     pa_xfree(p);
 795 }
 796
 797 void pa_http_protocol_add_server_string(pa_http_protocol *p, const char *name) {
 798     pa_assert(p);
 799     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 800     pa_assert(name);
 801
 802     p->servers = pa_strlist_prepend(p->servers, name);
 803 }
 804
 805 void pa_http_protocol_remove_server_string(pa_http_protocol *p, const char *name) {
 806     pa_assert(p);
 807     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 808     pa_assert(name);
 809
 810     p->servers = pa_strlist_remove(p->servers, name);
 811 }
 812
 813 pa_strlist *pa_http_protocol_servers(pa_http_protocol *p) {
 814     pa_assert(p);
 815     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 816
 817     return p->servers;
 818 }