test-server/test-server-pthreads.c

   1 /*
   2  * libwebsockets-test-server - libwebsockets test implementation
   3  *
   4  * Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
   5  *
   6  * This file is made available under the Creative Commons CC0 1.0
   7  * Universal Public Domain Dedication.
   8  *
   9  * The person who associated a work with this deed has dedicated
  10  * the work to the public domain by waiving all of his or her rights
  11  * to the work worldwide under copyright law, including all related
  12  * and neighboring rights, to the extent allowed by law. You can copy,
  13  * modify, distribute and perform the work, even for commercial purposes,
  14  * all without asking permission.
  15  *
  16  * The test apps are intended to be adapted for use in your code, which
  17  * may be proprietary.  So unlike the library itself, they are licensed
  18  * Public Domain.
  19  */
  20
  21 #include "test-server.h"
  22 #include <pthread.h>
  23
  24 int close_testing;
  25 int max_poll_elements;
  26 int debug_level = 7;
  27
  28 #ifdef EXTERNAL_POLL
  29 struct lws_pollfd *pollfds;
  30 int *fd_lookup;
  31 int count_pollfds;
  32 #endif
  33 volatile int force_exit = 0;
  34 struct lws_context *context;
  35
  36 #if defined(LWS_USE_POLARSSL)
  37 #else
  38 #if defined(LWS_USE_MBEDTLS)
  39 #else
  40 #if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
  41 char crl_path[1024] = "";
  42 #endif
  43 #endif
  44 #endif
  45
  46 /*
  47  * This mutex lock protects code that changes or relies on wsi list outside of
  48  * the service thread.  The service thread will acquire it when changing the
  49  * wsi list and other threads should acquire it while dereferencing wsis or
  50  * calling apis like lws_callback_on_writable_all_protocol() which
  51  * use the wsi list and wsis from a different thread context.
  52  */
  53 pthread_mutex_t lock_established_conns;
  54
  55 /* http server gets files from this path */
  56 #define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
  57 char *resource_path = LOCAL_RESOURCE_PATH;
  58
  59 /*
  60  * multithreaded version - protect wsi lifecycle changes in the library
  61  * these are called from protocol 0 callbacks
  62  */
  63
  64 void test_server_lock(int care)
  65 {
  66         if (care)
  67                 pthread_mutex_lock(&lock_established_conns);
  68 }
  69 void test_server_unlock(int care)
  70 {
  71         if (care)
  72                 pthread_mutex_unlock(&lock_established_conns);
  73 }
  74
  75 /*
  76  * This demo server shows how to use libwebsockets for one or more
  77  * websocket protocols in the same server
  78  *
  79  * It defines the following websocket protocols:
  80  *
  81  *  dumb-increment-protocol:  once the socket is opened, an incrementing
  82  *                              ascii string is sent down it every 50ms.
  83  *                              If you send "reset\n" on the websocket, then
  84  *                              the incrementing number is reset to 0.
  85  *
  86  *  lws-mirror-protocol: copies any received packet to every connection also
  87  *                              using this protocol, including the sender
  88  */
  89
  90 enum demo_protocols {
  91         /* always first */
  92         PROTOCOL_HTTP = 0,
  93
  94         PROTOCOL_DUMB_INCREMENT,
  95         PROTOCOL_LWS_MIRROR,
  96
  97         /* always last */
  98         DEMO_PROTOCOL_COUNT
  99 };
 100
 101 /* list of supported protocols and callbacks */
 102
 103 static struct lws_protocols protocols[] = {
 104         /* first protocol must always be HTTP handler */
 105
 106         {
 107                 "http-only",            /* name */
 108                 callback_http,          /* callback */
 109                 sizeof (struct per_session_data__http), /* per_session_data_size */
 110                 0,                      /* max frame size / rx buffer */
 111         },
 112         {
 113                 "dumb-increment-protocol",
 114                 callback_dumb_increment,
 115                 sizeof(struct per_session_data__dumb_increment),
 116                 10,
 117         },
 118         {
 119                 "lws-mirror-protocol",
 120                 callback_lws_mirror,
 121                 sizeof(struct per_session_data__lws_mirror),
 122                 128,
 123         },
 124         { NULL, NULL, 0, 0 } /* terminator */
 125 };
 126
 127 void *thread_dumb_increment(void *threadid)
 128 {
 129         while (!force_exit) {
 130                 /*
 131                  * this lock means wsi in the active list cannot
 132                  * disappear underneath us, because the code to add and remove
 133                  * them is protected by the same lock
 134                  */
 135                 pthread_mutex_lock(&lock_established_conns);
 136                 lws_callback_on_writable_all_protocol(context,
 137                                 &protocols[PROTOCOL_DUMB_INCREMENT]);
 138                 pthread_mutex_unlock(&lock_established_conns);
 139                 usleep(100000);
 140         }
 141
 142         pthread_exit(NULL);
 143 }
 144
 145 void *thread_service(void *threadid)
 146 {
 147         while (lws_service_tsi(context, 50, (int)(long)threadid) >= 0 && !force_exit)
 148                 ;
 149
 150         pthread_exit(NULL);
 151 }
 152
 153 void sighandler(int sig)
 154 {
 155         force_exit = 1;
 156         lws_cancel_service(context);
 157 }
 158
 159 static const struct lws_extension exts[] = {
 160         {
 161                 "permessage-deflate",
 162                 lws_extension_callback_pm_deflate,
 163                 "permessage-deflate; client_no_context_takeover; client_max_window_bits"
 164         },
 165         {
 166                 "deflate-frame",
 167                 lws_extension_callback_pm_deflate,
 168                 "deflate_frame"
 169         },
 170         { NULL, NULL, NULL /* terminator */ }
 171 };
 172
 173 static struct option options[] = {
 174         { "help",       no_argument,            NULL, 'h' },
 175         { "debug",      required_argument,      NULL, 'd' },
 176         { "port",       required_argument,      NULL, 'p' },
 177         { "ssl",        no_argument,            NULL, 's' },
 178         { "allow-non-ssl",      no_argument,    NULL, 'a' },
 179         { "interface",  required_argument,      NULL, 'i' },
 180         { "closetest",  no_argument,            NULL, 'c' },
 181         { "libev",  no_argument,                NULL, 'e' },
 182         { "threads",  required_argument,        NULL, 'j' },
 183 #ifndef LWS_NO_DAEMONIZE
 184         { "daemonize",  no_argument,            NULL, 'D' },
 185 #endif
 186         { "resource_path", required_argument,   NULL, 'r' },
 187         { NULL, 0, 0, 0 }
 188 };
 189
 190 int main(int argc, char **argv)
 191 {
 192         struct lws_context_creation_info info;
 193         char interface_name[128] = "";
 194         const char *iface = NULL;
 195         pthread_t pthread_dumb, pthread_service[32];
 196         char cert_path[1024];
 197         char key_path[1024];
 198         int threads = 1;
 199         int use_ssl = 0;
 200         void *retval;
 201         int opts = 0;
 202         int n = 0;
 203 #ifndef _WIN32
 204 /* LOG_PERROR is not POSIX standard, and may not be portable */
 205 #ifdef __sun
 206         int syslog_options = LOG_PID;
 207 #else
 208         int syslog_options = LOG_PID | LOG_PERROR;
 209 #endif
 210 #endif
 211 #ifndef LWS_NO_DAEMONIZE
 212         int daemonize = 0;
 213 #endif
 214
 215         /*
 216          * take care to zero down the info struct, he contains random garbaage
 217          * from the stack otherwise
 218          */
 219         memset(&info, 0, sizeof info);
 220         info.port = 7681;
 221
 222         pthread_mutex_init(&lock_established_conns, NULL);
 223
 224         while (n >= 0) {
 225                 n = getopt_long(argc, argv, "eci:hsap:d:Dr:j:", options, NULL);
 226                 if (n < 0)
 227                         continue;
 228                 switch (n) {
 229                 case 'j':
 230                         threads = atoi(optarg);
 231                         if (threads > ARRAY_SIZE(pthread_service)) {
 232                                 lwsl_err("Max threads %d\n",
 233                                          ARRAY_SIZE(pthread_service));
 234                                 return 1;
 235                         }
 236                         break;
 237                 case 'e':
 238                         opts |= LWS_SERVER_OPTION_LIBEV;
 239                         break;
 240 #ifndef LWS_NO_DAEMONIZE
 241                 case 'D':
 242                         daemonize = 1;
 243                         #if !defined(_WIN32) && !defined(__sun)
 244                         syslog_options &= ~LOG_PERROR;
 245                         #endif
 246                         break;
 247 #endif
 248                 case 'd':
 249                         debug_level = atoi(optarg);
 250                         break;
 251                 case 's':
 252                         use_ssl = 1;
 253                         break;
 254                 case 'a':
 255                         opts |= LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT;
 256                         break;
 257                 case 'p':
 258                         info.port = atoi(optarg);
 259                         break;
 260                 case 'i':
 261                         strncpy(interface_name, optarg, sizeof interface_name);
 262                         interface_name[(sizeof interface_name) - 1] = '\0';
 263                         iface = interface_name;
 264                         break;
 265                 case 'c':
 266                         close_testing = 1;
 267                         fprintf(stderr, " Close testing mode -- closes on "
 268                                            "client after 50 dumb increments"
 269                                            "and suppresses lws_mirror spam\n");
 270                         break;
 271                 case 'r':
 272                         resource_path = optarg;
 273                         printf("Setting resource path to \"%s\"\n", resource_path);
 274                         break;
 275                 case 'h':
 276                         fprintf(stderr, "Usage: test-server "
 277                                         "[--port=<p>] [--ssl] "
 278                                         "[-d <log bitfield>] "
 279                                         "[--resource_path <path>]\n");
 280                         exit(1);
 281                 }
 282         }
 283
 284 #if !defined(LWS_NO_DAEMONIZE) && !defined(WIN32)
 285         /*
 286          * normally lock path would be /var/lock/lwsts or similar, to
 287          * simplify getting started without having to take care about
 288          * permissions or running as root, set to /tmp/.lwsts-lock
 289          */
 290         if (daemonize && lws_daemonize("/tmp/.lwsts-lock")) {
 291                 fprintf(stderr, "Failed to daemonize\n");
 292                 return 1;
 293         }
 294 #endif
 295
 296         signal(SIGINT, sighandler);
 297
 298 #ifndef _WIN32
 299         /* we will only try to log things according to our debug_level */
 300         setlogmask(LOG_UPTO (LOG_DEBUG));
 301         openlog("lwsts", syslog_options, LOG_DAEMON);
 302 #endif
 303
 304         /* tell the library what debug level to emit and to send it to syslog */
 305         lws_set_log_level(debug_level, lwsl_emit_syslog);
 306         lwsl_notice("libwebsockets test server pthreads - license LGPL2.1+SLE\n");
 307         lwsl_notice("(C) Copyright 2010-2016 Andy Green <andy@warmcat.com>\n");
 308
 309         printf("Using resource path \"%s\"\n", resource_path);
 310 #ifdef EXTERNAL_POLL
 311         max_poll_elements = getdtablesize();
 312         pollfds = malloc(max_poll_elements * sizeof (struct lws_pollfd));
 313         fd_lookup = malloc(max_poll_elements * sizeof (int));
 314         if (pollfds == NULL || fd_lookup == NULL) {
 315                 lwsl_err("Out of memory pollfds=%d\n", max_poll_elements);
 316                 return -1;
 317         }
 318 #endif
 319
 320         info.iface = iface;
 321         info.protocols = protocols;
 322         info.extensions = exts;
 323
 324         info.ssl_cert_filepath = NULL;
 325         info.ssl_private_key_filepath = NULL;
 326
 327         if (use_ssl) {
 328                 if (strlen(resource_path) > sizeof(cert_path) - 32) {
 329                         lwsl_err("resource path too long\n");
 330                         return -1;
 331                 }
 332                 sprintf(cert_path, "%s/libwebsockets-test-server.pem",
 333                         resource_path);
 334                 if (strlen(resource_path) > sizeof(key_path) - 32) {
 335                         lwsl_err("resource path too long\n");
 336                         return -1;
 337                 }
 338                 sprintf(key_path, "%s/libwebsockets-test-server.key.pem",
 339                         resource_path);
 340
 341                 info.ssl_cert_filepath = cert_path;
 342                 info.ssl_private_key_filepath = key_path;
 343         }
 344         info.gid = -1;
 345         info.uid = -1;
 346         info.options = opts;
 347         info.count_threads = threads;
 348         info.extensions = exts;
 349         info.max_http_header_pool = 4;
 350
 351         context = lws_create_context(&info);
 352         if (context == NULL) {
 353                 lwsl_err("libwebsocket init failed\n");
 354                 return -1;
 355         }
 356
 357         /* start the dumb increment thread */
 358
 359         n = pthread_create(&pthread_dumb, NULL, thread_dumb_increment, 0);
 360         if (n) {
 361                 lwsl_err("Unable to create dumb thread\n");
 362                 goto done;
 363         }
 364
 365         /*
 366          * notice the actual number of threads may be capped by the library,
 367          * so use lws_get_count_threads() to get the actual amount of threads
 368          * initialized.
 369          */
 370
 371         for (n = 0; n < lws_get_count_threads(context); n++)
 372                 if (pthread_create(&pthread_service[n], NULL, thread_service,
 373                                    (void *)(long)n))
 374                         lwsl_err("Failed to start service thread\n");
 375
 376         /* wait for all the service threads to exit */
 377
 378         while ((--n) >= 0)
 379                 pthread_join(pthread_service[n], &retval);
 380
 381         /* wait for pthread_dumb to exit */
 382         pthread_join(pthread_dumb, &retval);
 383
 384 done:
 385         lws_context_destroy(context);
 386         pthread_mutex_destroy(&lock_established_conns);
 387
 388         lwsl_notice("libwebsockets-test-server exited cleanly\n");
 389
 390 #ifndef _WIN32
 391         closelog();
 392 #endif
 393
 394         return 0;
 395 }