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