lib/context.c

   1 /*
   2  * libwebsockets - small server side websockets and web server implementation
   3  *
   4  * Copyright (C) 2010-2015 Andy Green <andy@warmcat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License as published by the Free Software Foundation:
   9  *  version 2.1 of the License.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Lesser General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  19  *  MA  02110-1301  USA
  20  */
  21
  22 #include "private-libwebsockets.h"
  23
  24 #ifndef LWS_BUILD_HASH
  25 #define LWS_BUILD_HASH "unknown-build-hash"
  26 #endif
  27
  28 static const char *library_version = LWS_LIBRARY_VERSION " " LWS_BUILD_HASH;
  29
  30 /**
  31  * lws_get_library_version: get version and git hash library built from
  32  *
  33  *      returns a const char * to a string like "1.1 178d78c"
  34  *      representing the library version followed by the git head hash it
  35  *      was built from
  36  */
  37 LWS_VISIBLE const char *
  38 lws_get_library_version(void)
  39 {
  40         return library_version;
  41 }
  42
  43 static const char * const mount_protocols[] = {
  44         "http://",
  45         "https://",
  46         "file://",
  47         "cgi://",
  48         ">http://",
  49         ">https://",
  50 };
  51
  52 LWS_VISIBLE LWS_EXTERN int
  53 lws_write_http_mount(struct lws_http_mount *next, struct lws_http_mount **res,
  54                      void *store, const char *mountpoint, const char *origin,
  55                      const char *def)
  56 {
  57         struct lws_http_mount *m;
  58         void *orig = store;
  59         unsigned long l = (unsigned long)store;
  60         int n;
  61
  62         if (l & 15)
  63                 l += 16 - (l & 15);
  64
  65         store = (void *)l;
  66         m = (struct lws_http_mount *)store;
  67         *res = m;
  68
  69         m->def = def;
  70         m->mountpoint = mountpoint;
  71         m->mountpoint_len = (unsigned char)strlen(mountpoint);
  72         m->mount_next = NULL;
  73         if (next)
  74                 next->mount_next = m;
  75
  76         for (n = 0; n < ARRAY_SIZE(mount_protocols); n++)
  77                 if (!strncmp(origin, mount_protocols[n],
  78                      strlen(mount_protocols[n]))) {
  79                         m->origin_protocol = n;
  80                         m->origin = origin + strlen(mount_protocols[n]);
  81                         break;
  82                 }
  83
  84         if (n == ARRAY_SIZE(mount_protocols)) {
  85                 lwsl_err("unsupported protocol://\n");
  86                 return 0; /* ie, fail */
  87         }
  88
  89         return ((char *)store + sizeof(*m)) - (char *)orig;
  90 }
  91
  92 LWS_VISIBLE void *
  93 lws_protocol_vh_priv_zalloc(struct lws_vhost *vhost, const struct lws_protocols *prot,
  94                             int size)
  95 {
  96         int n = 0;
  97
  98         /* allocate the vh priv array only on demand */
  99         if (!vhost->protocol_vh_privs) {
 100                 vhost->protocol_vh_privs = (void **)lws_zalloc(
 101                                 vhost->count_protocols * sizeof(void *));
 102                 if (!vhost->protocol_vh_privs)
 103                         return NULL;
 104         }
 105
 106         while (n < vhost->count_protocols && &vhost->protocols[n] != prot)
 107                 n++;
 108
 109         if (n == vhost->count_protocols)
 110                 return NULL;
 111
 112         vhost->protocol_vh_privs[n] = lws_zalloc(size);
 113         return vhost->protocol_vh_privs[n];
 114 }
 115
 116 LWS_VISIBLE void *
 117 lws_protocol_vh_priv_get(struct lws_vhost *vhost, const struct lws_protocols *prot)
 118 {
 119         int n = 0;
 120
 121         if (!vhost->protocol_vh_privs)
 122                 return NULL;
 123
 124         while (n < vhost->count_protocols && &vhost->protocols[n] != prot)
 125                 n++;
 126
 127         if (n == vhost->count_protocols) {
 128                 lwsl_err("%s: unknown protocol %p\n", __func__, prot);
 129                 return NULL;
 130         }
 131
 132         return vhost->protocol_vh_privs[n];
 133 }
 134
 135 static struct lws_protocol_vhost_options *
 136 lws_vhost_protocol_options(struct lws_vhost *vh, const char *name)
 137 {
 138         struct lws_protocol_vhost_options *pvo = vh->pvo;
 139
 140         while (pvo) {
 141                 // lwsl_notice("%s: '%s' '%s'\n", __func__, pvo->name, name);
 142                 if (!strcmp(pvo->name, name))
 143                         return pvo;
 144                 pvo = pvo->next;
 145         }
 146
 147         return NULL;
 148 }
 149
 150 int
 151 lws_protocol_init(struct lws_context *context)
 152 {
 153         struct lws_vhost *vh = context->vhost_list;
 154         struct lws_protocol_vhost_options *pvo;
 155         struct lws wsi;
 156         int n;
 157
 158         memset(&wsi, 0, sizeof(wsi));
 159         wsi.context = context;
 160
 161         while (vh) {
 162                 wsi.vhost = vh;
 163
 164                 /* initialize supported protocols on this vhost */
 165
 166                 for (n = 0; n < vh->count_protocols; n++) {
 167                         wsi.protocol = &vh->protocols[n];
 168
 169                         pvo = lws_vhost_protocol_options(vh,
 170                                                          vh->protocols[n].name);
 171                         if (pvo)
 172                                 /*
 173                                  * linked list of options specific to
 174                                  * vh + protocol
 175                                  */
 176                                 pvo = pvo->options;
 177
 178                         /*
 179                          * inform all the protocols that they are doing their one-time
 180                          * initialization if they want to.
 181                          *
 182                          * NOTE the wsi is all zeros except for the context, vh and
 183                          * protocol ptrs so lws_get_context(wsi) etc can work
 184                          */
 185                         vh->protocols[n].callback(&wsi,
 186                                 LWS_CALLBACK_PROTOCOL_INIT, NULL, pvo, 0);
 187                 }
 188
 189                 vh = vh->vhost_next;
 190         }
 191
 192         context->protocol_init_done = 1;
 193
 194         return 0;
 195 }
 196
 197 LWS_VISIBLE struct lws_vhost *
 198 lws_create_vhost(struct lws_context *context,
 199                  struct lws_context_creation_info *info,
 200                  struct lws_http_mount *mounts)
 201 {
 202         struct lws_vhost *vh = lws_zalloc(sizeof(*vh)),
 203                          **vh1 = &context->vhost_list;
 204 #ifdef LWS_WITH_PLUGINS
 205         struct lws_plugin *plugin = context->plugin_list;
 206         struct lws_protocols *lwsp;
 207         int m, n, f = !info->pvo;
 208 #endif
 209         char *p;
 210
 211         if (!vh)
 212                 return NULL;
 213
 214         vh->context = context;
 215         if (!info->vhost_name)
 216                 vh->name = "default";
 217         else
 218                 vh->name = info->vhost_name;
 219
 220         vh->iface = info->iface;
 221         for (vh->count_protocols = 0;
 222              info->protocols[vh->count_protocols].callback;
 223              vh->count_protocols++)
 224                 ;
 225
 226         vh->pvo = info->pvo;
 227
 228 #ifdef LWS_WITH_PLUGINS
 229         if (plugin) {
 230                 /*
 231                  * give the vhost a unified list of protocols including the
 232                  * ones that came from plugins
 233                  */
 234                 lwsp = lws_zalloc(sizeof(struct lws_protocols) *
 235                                            (vh->count_protocols +
 236                                            context->plugin_protocol_count + 1));
 237                 if (!lwsp)
 238                         return NULL;
 239
 240                 m = vh->count_protocols;
 241                 memcpy(lwsp, info->protocols,
 242                        sizeof(struct lws_protocols) * m);
 243
 244                 /* for compatibility, all protocols enabled on vhost if only
 245                  * the default vhost exists.  Otherwise only vhosts who ask
 246                  * for a protocol get it enabled.
 247                  */
 248
 249                 if (info->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
 250                         f = 0;
 251
 252                 while (plugin) {
 253                         for (n = 0; n < plugin->caps.count_protocols; n++) {
 254                                 /*
 255                                  * for compatibility's sake, no pvo implies
 256                                  * allow all protocols
 257                                  */
 258                                 if (f || lws_vhost_protocol_options(vh,
 259                                     plugin->caps.protocols[n].name)) {
 260                                         memcpy(&lwsp[m],
 261                                                &plugin->caps.protocols[n],
 262                                                sizeof(struct lws_protocols));
 263                                         m++;
 264                                         vh->count_protocols++;
 265                                 }
 266                         }
 267                         plugin = plugin->list;
 268                 }
 269                 vh->protocols = lwsp;
 270         } else
 271 #endif
 272                 vh->protocols = info->protocols;
 273
 274         vh->mount_list = mounts;
 275
 276         lwsl_notice("Creating Vhost '%s' port %d, %d protocols\n",
 277                         vh->name, info->port, vh->count_protocols);
 278
 279         while (mounts) {
 280                 lwsl_notice("   mounting %s%s to %s\n",
 281                                 mount_protocols[mounts->origin_protocol],
 282                                 mounts->origin, mounts->mountpoint);
 283                 mounts = mounts->mount_next;
 284         }
 285
 286 #ifndef LWS_NO_EXTENSIONS
 287 #ifdef LWS_WITH_PLUGINS
 288         if (context->plugin_extension_count) {
 289
 290                 m = 0;
 291                 while (info->extensions && info->extensions[m].callback)
 292                         m++;
 293
 294                 /*
 295                  * give the vhost a unified list of extensions including the
 296                  * ones that came from plugins
 297                  */
 298                 vh->extensions = lws_zalloc(sizeof(struct lws_extension) *
 299                                            (m +
 300                                            context->plugin_extension_count + 1));
 301                 if (!vh->extensions)
 302                         return NULL;
 303
 304                 memcpy((struct lws_extension *)vh->extensions, info->extensions,
 305                        sizeof(struct lws_extension) * m);
 306                 while (plugin) {
 307                         memcpy((struct lws_extension *)&vh->extensions[m], plugin->caps.extensions,
 308                                sizeof(struct lws_extension) *
 309                                plugin->caps.count_extensions);
 310                         m += plugin->caps.count_extensions;
 311                         plugin = plugin->list;
 312                 }
 313         } else
 314 #endif
 315                 vh->extensions = info->extensions;
 316 #endif
 317
 318         vh->listen_port = info->port;
 319         vh->http_proxy_port = 0;
 320         vh->http_proxy_address[0] = '\0';
 321
 322         /* either use proxy from info, or try get it from env var */
 323
 324         if (info->http_proxy_address) {
 325                 /* override for backwards compatibility */
 326                 if (info->http_proxy_port)
 327                         vh->http_proxy_port = info->http_proxy_port;
 328                 lws_set_proxy(vh, info->http_proxy_address);
 329         } else {
 330 #ifdef LWS_HAVE_GETENV
 331                 p = getenv("http_proxy");
 332                 if (p)
 333                         lws_set_proxy(vh, p);
 334 #endif
 335         }
 336
 337         vh->ka_time = info->ka_time;
 338         vh->ka_interval = info->ka_interval;
 339         vh->ka_probes = info->ka_probes;
 340
 341         if (lws_context_init_server_ssl(info, vh))
 342                 goto bail;
 343
 344         if (lws_context_init_client_ssl(info, vh))
 345                 goto bail;
 346
 347         if (lws_context_init_server(info, vh))
 348                 goto bail;
 349
 350         while (1) {
 351                 if (!(*vh1)) {
 352                         *vh1 = vh;
 353                         break;
 354                 }
 355                 vh1 = &(*vh1)->vhost_next;
 356         };
 357
 358         return vh;
 359
 360 bail:
 361         lws_free(vh);
 362
 363         return NULL;
 364 }
 365
 366 /**
 367  * lws_create_context() - Create the websocket handler
 368  * @info:       pointer to struct with parameters
 369  *
 370  *      This function creates the listening socket (if serving) and takes care
 371  *      of all initialization in one step.
 372  *
 373  *      After initialization, it returns a struct lws_context * that
 374  *      represents this server.  After calling, user code needs to take care
 375  *      of calling lws_service() with the context pointer to get the
 376  *      server's sockets serviced.  This must be done in the same process
 377  *      context as the initialization call.
 378  *
 379  *      The protocol callback functions are called for a handful of events
 380  *      including http requests coming in, websocket connections becoming
 381  *      established, and data arriving; it's also called periodically to allow
 382  *      async transmission.
 383  *
 384  *      HTTP requests are sent always to the FIRST protocol in @protocol, since
 385  *      at that time websocket protocol has not been negotiated.  Other
 386  *      protocols after the first one never see any HTTP callack activity.
 387  *
 388  *      The server created is a simple http server by default; part of the
 389  *      websocket standard is upgrading this http connection to a websocket one.
 390  *
 391  *      This allows the same server to provide files like scripts and favicon /
 392  *      images or whatever over http and dynamic data over websockets all in
 393  *      one place; they're all handled in the user callback.
 394  */
 395 LWS_VISIBLE struct lws_context *
 396 lws_create_context(struct lws_context_creation_info *info)
 397 {
 398         struct lws_context *context = NULL;
 399         struct lws wsi;
 400 #ifndef LWS_NO_DAEMONIZE
 401         int pid_daemon = get_daemonize_pid();
 402 #endif
 403         int n, m;
 404 #if defined(__ANDROID__)
 405         struct rlimit rt;
 406 #endif
 407
 408
 409         lwsl_notice("Initial logging level %d\n", log_level);
 410         lwsl_notice("Libwebsockets version: %s\n", library_version);
 411 #if LWS_POSIX
 412 #ifdef LWS_USE_IPV6
 413         if (!lws_check_opt(info->options, LWS_SERVER_OPTION_DISABLE_IPV6))
 414                 lwsl_notice("IPV6 compiled in and enabled\n");
 415         else
 416                 lwsl_notice("IPV6 compiled in but disabled\n");
 417 #else
 418         lwsl_notice("IPV6 not compiled in\n");
 419 #endif
 420         lws_feature_status_libev(info);
 421         lws_feature_status_libuv(info);
 422 #endif
 423         lwsl_info(" LWS_DEF_HEADER_LEN    : %u\n", LWS_DEF_HEADER_LEN);
 424         lwsl_info(" LWS_MAX_PROTOCOLS     : %u\n", LWS_MAX_PROTOCOLS);
 425         lwsl_info(" LWS_MAX_SMP           : %u\n", LWS_MAX_SMP);
 426         lwsl_info(" SPEC_LATEST_SUPPORTED : %u\n", SPEC_LATEST_SUPPORTED);
 427         lwsl_info(" sizeof (*info)        : %u\n", sizeof(*info));
 428 #if LWS_POSIX
 429         lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
 430 #endif
 431         if (lws_plat_context_early_init())
 432                 return NULL;
 433
 434         context = lws_zalloc(sizeof(struct lws_context));
 435         if (!context) {
 436                 lwsl_err("No memory for websocket context\n");
 437                 return NULL;
 438         }
 439 #ifndef LWS_NO_DAEMONIZE
 440         if (pid_daemon) {
 441                 context->started_with_parent = pid_daemon;
 442                 lwsl_notice(" Started with daemon pid %d\n", pid_daemon);
 443         }
 444 #endif
 445 #if defined(__ANDROID__)
 446                 n = getrlimit ( RLIMIT_NOFILE,&rt);
 447                 if (-1 == n) {
 448                         lwsl_err("Get RLIMIT_NOFILE failed!\n");
 449                         return NULL;
 450                 }
 451                 context->max_fds = rt.rlim_cur;
 452 #else
 453                 context->max_fds = getdtablesize();
 454 #endif
 455
 456         if (info->count_threads)
 457                 context->count_threads = info->count_threads;
 458         else
 459                 context->count_threads = 1;
 460
 461         if (context->count_threads > LWS_MAX_SMP)
 462                 context->count_threads = LWS_MAX_SMP;
 463
 464         context->token_limits = info->token_limits;
 465
 466         context->options = info->options;
 467
 468         if (info->timeout_secs)
 469                 context->timeout_secs = info->timeout_secs;
 470         else
 471                 context->timeout_secs = AWAITING_TIMEOUT;
 472
 473         lwsl_info(" default timeout (secs): %u\n", context->timeout_secs);
 474
 475         if (info->max_http_header_data)
 476                 context->max_http_header_data = info->max_http_header_data;
 477         else
 478                 context->max_http_header_data = LWS_DEF_HEADER_LEN;
 479         if (info->max_http_header_pool)
 480                 context->max_http_header_pool = info->max_http_header_pool;
 481         else
 482                 context->max_http_header_pool = LWS_DEF_HEADER_POOL;
 483
 484         /*
 485          * Allocate the per-thread storage for scratchpad buffers,
 486          * and header data pool
 487          */
 488         for (n = 0; n < context->count_threads; n++) {
 489                 context->pt[n].serv_buf = lws_zalloc(LWS_MAX_SOCKET_IO_BUF);
 490                 if (!context->pt[n].serv_buf) {
 491                         lwsl_err("OOM\n");
 492                         return NULL;
 493                 }
 494
 495                 context->pt[n].context = context;
 496                 context->pt[n].tid = n;
 497                 context->pt[n].http_header_data = lws_malloc(context->max_http_header_data *
 498                                                        context->max_http_header_pool);
 499                 if (!context->pt[n].http_header_data)
 500                         goto bail;
 501
 502                 context->pt[n].ah_pool = lws_zalloc(sizeof(struct allocated_headers) *
 503                                               context->max_http_header_pool);
 504                 for (m = 0; m < context->max_http_header_pool; m++)
 505                         context->pt[n].ah_pool[m].data =
 506                                 (char *)context->pt[n].http_header_data +
 507                                 (m * context->max_http_header_data);
 508                 if (!context->pt[n].ah_pool)
 509                         goto bail;
 510
 511                 lws_pt_mutex_init(&context->pt[n]);
 512         }
 513
 514         if (info->fd_limit_per_thread)
 515                 context->fd_limit_per_thread = info->fd_limit_per_thread;
 516         else
 517                 context->fd_limit_per_thread = context->max_fds /
 518                                                context->count_threads;
 519
 520         lwsl_notice(" Threads: %d each %d fds\n", context->count_threads,
 521                     context->fd_limit_per_thread);
 522
 523         memset(&wsi, 0, sizeof(wsi));
 524         wsi.context = context;
 525
 526         if (!info->ka_interval && info->ka_time > 0) {
 527                 lwsl_err("info->ka_interval can't be 0 if ka_time used\n");
 528                 return NULL;
 529         }
 530
 531 #ifdef LWS_USE_LIBEV
 532         /* (Issue #264) In order to *avoid breaking backwards compatibility*, we
 533          * enable libev mediated SIGINT handling with a default handler of
 534          * lws_sigint_cb. The handler can be overridden or disabled
 535          * by invoking lws_sigint_cfg after creating the context, but
 536          * before invoking lws_initloop:
 537          */
 538         context->use_ev_sigint = 1;
 539         context->lws_ev_sigint_cb = &lws_ev_sigint_cb;
 540 #endif /* LWS_USE_LIBEV */
 541 #ifdef LWS_USE_LIBUV
 542         /* (Issue #264) In order to *avoid breaking backwards compatibility*, we
 543          * enable libev mediated SIGINT handling with a default handler of
 544          * lws_sigint_cb. The handler can be overridden or disabled
 545          * by invoking lws_sigint_cfg after creating the context, but
 546          * before invoking lws_initloop:
 547          */
 548         context->use_ev_sigint = 1;
 549         context->lws_uv_sigint_cb = &lws_uv_sigint_cb;
 550 #endif
 551
 552         lwsl_info(" mem: context:         %5u bytes (%d ctx + (%d thr x %d))\n",
 553                   sizeof(struct lws_context) +
 554                   (context->count_threads * LWS_MAX_SOCKET_IO_BUF),
 555                   sizeof(struct lws_context),
 556                   context->count_threads,
 557                   LWS_MAX_SOCKET_IO_BUF);
 558
 559         lwsl_info(" mem: http hdr rsvd:   %5u bytes (%u thr x (%u + %u) x %u))\n",
 560                     (context->max_http_header_data +
 561                      sizeof(struct allocated_headers)) *
 562                     context->max_http_header_pool * context->count_threads,
 563                     context->count_threads,
 564                     context->max_http_header_data,
 565                     sizeof(struct allocated_headers),
 566                     context->max_http_header_pool);
 567         n = sizeof(struct lws_pollfd) * context->count_threads *
 568             context->fd_limit_per_thread;
 569         context->pt[0].fds = lws_zalloc(n);
 570         if (context->pt[0].fds == NULL) {
 571                 lwsl_err("OOM allocating %d fds\n", context->max_fds);
 572                 goto bail;
 573         }
 574         lwsl_info(" mem: pollfd map:      %5u\n", n);
 575
 576 #if LWS_MAX_SMP > 1
 577         /* each thread serves his own chunk of fds */
 578         for (n = 1; n < (int)info->count_threads; n++)
 579                 context->pt[n].fds = context->pt[n - 1].fds +
 580                                      context->fd_limit_per_thread;
 581 #endif
 582
 583         if (lws_plat_init(context, info))
 584                 goto bail;
 585
 586         lws_context_init_ssl_library(info);
 587
 588         /*
 589          * if he's not saying he'll make his own vhosts later then act
 590          * compatibly and make a default vhost using the data in the info
 591          */
 592         if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
 593                 if (!lws_create_vhost(context, info, NULL)) {
 594                         lwsl_err("Failed to create default vhost\n");
 595                         return NULL;
 596                 }
 597
 598         lws_context_init_extensions(info, context);
 599
 600         context->user_space = info->user;
 601
 602         lwsl_notice(" mem: per-conn:        %5u bytes + protocol rx buf\n",
 603                     sizeof(struct lws));
 604
 605         strcpy(context->canonical_hostname, "unknown");
 606         lws_server_get_canonical_hostname(context, info);
 607
 608         context->uid = info->uid;
 609         context->gid = info->gid;
 610
 611         /*
 612          * drop any root privs for this process
 613          * to listen on port < 1023 we would have needed root, but now we are
 614          * listening, we don't want the power for anything else
 615          */
 616         if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
 617                 lws_plat_drop_app_privileges(info);
 618
 619         /*
 620          * give all extensions a chance to create any per-context
 621          * allocations they need
 622          */
 623         if (info->port != CONTEXT_PORT_NO_LISTEN) {
 624                 if (lws_ext_cb_all_exts(context, NULL,
 625                         LWS_EXT_CB_SERVER_CONTEXT_CONSTRUCT, NULL, 0) < 0)
 626                         goto bail;
 627         } else
 628                 if (lws_ext_cb_all_exts(context, NULL,
 629                         LWS_EXT_CB_CLIENT_CONTEXT_CONSTRUCT, NULL, 0) < 0)
 630                         goto bail;
 631
 632         return context;
 633
 634 bail:
 635         lws_context_destroy(context);
 636         return NULL;
 637 }
 638
 639 /**
 640  * lws_context_destroy() - Destroy the websocket context
 641  * @context:    Websocket context
 642  *
 643  *      This function closes any active connections and then frees the
 644  *      context.  After calling this, any further use of the context is
 645  *      undefined.
 646  */
 647 LWS_VISIBLE void
 648 lws_context_destroy(struct lws_context *context)
 649 {
 650         const struct lws_protocols *protocol = NULL;
 651         struct lws_context_per_thread *pt;
 652         struct lws_vhost *vh, *vh1;
 653         struct lws wsi;
 654         int n, m;
 655
 656         lwsl_notice("%s\n", __func__);
 657
 658         if (!context)
 659                 return;
 660
 661         m = context->count_threads;
 662         context->being_destroyed = 1;
 663
 664         memset(&wsi, 0, sizeof(wsi));
 665         wsi.context = context;
 666
 667 #ifdef LWS_LATENCY
 668         if (context->worst_latency_info[0])
 669                 lwsl_notice("Worst latency: %s\n", context->worst_latency_info);
 670 #endif
 671
 672         while (m--) {
 673                 pt = &context->pt[m];
 674
 675                 for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
 676                         struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
 677                         if (!wsi)
 678                                 continue;
 679
 680                         lws_close_free_wsi(wsi,
 681                                 LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
 682                                 /* no protocol close */);
 683                         n--;
 684                 }
 685         }
 686         /*
 687          * give all extensions a chance to clean up any per-context
 688          * allocations they might have made
 689          */
 690
 691         n = lws_ext_cb_all_exts(context, NULL,
 692                                 LWS_EXT_CB_SERVER_CONTEXT_DESTRUCT, NULL, 0);
 693
 694         n = lws_ext_cb_all_exts(context, NULL,
 695                                 LWS_EXT_CB_CLIENT_CONTEXT_DESTRUCT, NULL, 0);
 696
 697         /*
 698          * inform all the protocols that they are done and will have no more
 699          * callbacks.
 700          *
 701          * We can't free things until after the event loop shuts down.
 702          */
 703         vh = context->vhost_list;
 704         while (vh) {
 705                 wsi.vhost = vh;
 706                 protocol = vh->protocols;
 707                 if (protocol) {
 708                         n = 0;
 709                         while (n < vh->count_protocols) {
 710                                 wsi.protocol = protocol;
 711                                 protocol->callback(&wsi, LWS_CALLBACK_PROTOCOL_DESTROY,
 712                                                    NULL, NULL, 0);
 713                                 protocol++;
 714                                 n++;
 715                         }
 716                 }
 717
 718                 vh = vh->vhost_next;
 719         }
 720
 721         for (n = 0; n < context->count_threads; n++) {
 722                 pt = &context->pt[n];
 723
 724                 lws_libev_destroyloop(context, n);
 725                 lws_libuv_destroyloop(context, n);
 726
 727                 lws_free_set_NULL(context->pt[n].serv_buf);
 728                 if (pt->ah_pool)
 729                         lws_free(pt->ah_pool);
 730                 if (pt->http_header_data)
 731                         lws_free(pt->http_header_data);
 732         }
 733         lws_plat_context_early_destroy(context);
 734         lws_ssl_context_destroy(context);
 735
 736         if (context->pt[0].fds)
 737                 lws_free_set_NULL(context->pt[0].fds);
 738
 739         /* free all the vhost allocations */
 740
 741         vh = context->vhost_list;
 742         while (vh) {
 743                 protocol = vh->protocols;
 744                 if (protocol) {
 745                         n = 0;
 746                         while (n < vh->count_protocols) {
 747                                 if (vh->protocol_vh_privs &&
 748                                     vh->protocol_vh_privs[n]) {
 749                                         lws_free(vh->protocol_vh_privs[n]);
 750                                         vh->protocol_vh_privs[n] = NULL;
 751                                 }
 752                                 protocol++;
 753                                 n++;
 754                         }
 755                 }
 756                 if (vh->protocol_vh_privs)
 757                         lws_free(vh->protocol_vh_privs);
 758                 lws_ssl_SSL_CTX_destroy(vh);
 759 #ifdef LWS_WITH_PLUGINS
 760                 if (context->plugin_list)
 761                         lws_free((void *)vh->protocols);
 762 #ifndef LWS_NO_EXTENSIONS
 763                 if (context->plugin_extension_count)
 764                         lws_free((void *)vh->extensions);
 765 #endif
 766 #endif
 767                 vh1 = vh->vhost_next;
 768                 lws_free(vh);
 769                 vh = vh1;
 770         }
 771
 772         lws_plat_context_late_destroy(context);
 773
 774         lws_free(context);
 775 }