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