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