test-server/test-server.c

   1 /*
   2  * libwebsockets-test-server - libwebsockets test implementation
   3  *
   4  * Copyright (C) 2010-2011 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 <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <getopt.h>
  26 #include <string.h>
  27 #include <sys/time.h>
  28 #include <assert.h>
  29 #include <syslog.h>
  30 #include <signal.h>
  31
  32 #include "../lib/libwebsockets.h"
  33
  34 static int close_testing;
  35 int max_poll_elements;
  36
  37 struct pollfd *pollfds;
  38 int *fd_lookup;
  39 int count_pollfds;
  40 int force_exit = 0;
  41
  42 /*
  43  * This demo server shows how to use libwebsockets for one or more
  44  * websocket protocols in the same server
  45  *
  46  * It defines the following websocket protocols:
  47  *
  48  *  dumb-increment-protocol:  once the socket is opened, an incrementing
  49  *                              ascii string is sent down it every 50ms.
  50  *                              If you send "reset\n" on the websocket, then
  51  *                              the incrementing number is reset to 0.
  52  *
  53  *  lws-mirror-protocol: copies any received packet to every connection also
  54  *                              using this protocol, including the sender
  55  */
  56
  57 enum demo_protocols {
  58         /* always first */
  59         PROTOCOL_HTTP = 0,
  60
  61         PROTOCOL_DUMB_INCREMENT,
  62         PROTOCOL_LWS_MIRROR,
  63
  64         /* always last */
  65         DEMO_PROTOCOL_COUNT
  66 };
  67
  68
  69 #define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
  70
  71 /*
  72  * We take a strict whitelist approach to stop ../ attacks
  73  */
  74
  75 struct serveable {
  76         const char *urlpath;
  77         const char *mimetype;
  78 };
  79
  80 static const struct serveable whitelist[] = {
  81         { "/favicon.ico", "image/x-icon" },
  82         { "/libwebsockets.org-logo.png", "image/png" },
  83
  84         /* last one is the default served if no match */
  85         { "/test.html", "text/html" },
  86 };
  87
  88 /* this protocol server (always the first one) just knows how to do HTTP */
  89
  90 static int callback_http(struct libwebsocket_context *context,
  91                 struct libwebsocket *wsi,
  92                 enum libwebsocket_callback_reasons reason, void *user,
  93                                                            void *in, size_t len)
  94 {
  95 #if 0
  96         char client_name[128];
  97         char client_ip[128];
  98 #endif
  99         char buf[256];
 100         int n;
 101 #ifdef EXTERNAL_POLL
 102         int m;
 103         int fd = (int)(long)user;
 104 #endif
 105
 106         switch (reason) {
 107         case LWS_CALLBACK_HTTP:
 108
 109                 for (n = 0; n < (sizeof(whitelist) / sizeof(whitelist[0]) - 1); n++)
 110                         if (in && strcmp((const char *)in, whitelist[n].urlpath) == 0)
 111                                 break;
 112
 113                 sprintf(buf, LOCAL_RESOURCE_PATH"%s", whitelist[n].urlpath);
 114
 115                 if (libwebsockets_serve_http_file(context, wsi, buf, whitelist[n].mimetype))
 116                         lwsl_err("Failed to send HTTP file\n");
 117
 118                 /*
 119                  * notice that the sending of the file completes asynchronously,
 120                  * we'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
 121                  * it's done
 122                  */
 123
 124                 break;
 125
 126         case LWS_CALLBACK_HTTP_FILE_COMPLETION:
 127 //              lwsl_info("LWS_CALLBACK_HTTP_FILE_COMPLETION seen\n");
 128                 /* kill the connection after we sent one file */
 129                 return 1;
 130
 131         /*
 132          * callback for confirming to continue with client IP appear in
 133          * protocol 0 callback since no websocket protocol has been agreed
 134          * yet.  You can just ignore this if you won't filter on client IP
 135          * since the default uhandled callback return is 0 meaning let the
 136          * connection continue.
 137          */
 138
 139         case LWS_CALLBACK_FILTER_NETWORK_CONNECTION:
 140 #if 0
 141                 libwebsockets_get_peer_addresses(context, wsi, (int)(long)user, client_name,
 142                              sizeof(client_name), client_ip, sizeof(client_ip));
 143
 144                 fprintf(stderr, "Received network connect from %s (%s)\n",
 145                                                         client_name, client_ip);
 146 #endif
 147                 /* if we returned non-zero from here, we kill the connection */
 148                 break;
 149
 150 #ifdef EXTERNAL_POLL
 151         /*
 152          * callbacks for managing the external poll() array appear in
 153          * protocol 0 callback
 154          */
 155
 156         case LWS_CALLBACK_ADD_POLL_FD:
 157
 158                 if (count_pollfds >= max_poll_elements) {
 159                         lwsl_err("LWS_CALLBACK_ADD_POLL_FD: too many sockets to track\n");
 160                         return 1;
 161                 }
 162
 163                 fd_lookup[fd] = count_pollfds;
 164                 pollfds[count_pollfds].fd = fd;
 165                 pollfds[count_pollfds].events = (int)(long)len;
 166                 pollfds[count_pollfds++].revents = 0;
 167                 break;
 168
 169         case LWS_CALLBACK_DEL_POLL_FD:
 170                 if (!--count_pollfds)
 171                         break;
 172                 m = fd_lookup[fd];
 173                 /* have the last guy take up the vacant slot */
 174                 pollfds[m] = pollfds[count_pollfds];
 175                 fd_lookup[pollfds[count_pollfds].fd] = m;
 176                 break;
 177
 178         case LWS_CALLBACK_SET_MODE_POLL_FD:
 179                 pollfds[fd_lookup[fd]].events |= (int)(long)len;
 180                 break;
 181
 182         case LWS_CALLBACK_CLEAR_MODE_POLL_FD:
 183                 pollfds[fd_lookup[fd]].events &= ~(int)(long)len;
 184                 break;
 185 #endif
 186
 187         default:
 188                 break;
 189         }
 190
 191         return 0;
 192 }
 193
 194 /*
 195  * this is just an example of parsing handshake headers, you don't need this
 196  * in your code unless you will filter allowing connections by the header
 197  * content
 198  */
 199
 200 static void
 201 dump_handshake_info(struct lws_tokens *lwst)
 202 {
 203         int n;
 204         static const char *token_names[WSI_TOKEN_COUNT] = {
 205                 /*[WSI_TOKEN_GET_URI]           =*/ "GET URI",
 206                 /*[WSI_TOKEN_HOST]              =*/ "Host",
 207                 /*[WSI_TOKEN_CONNECTION]        =*/ "Connection",
 208                 /*[WSI_TOKEN_KEY1]              =*/ "key 1",
 209                 /*[WSI_TOKEN_KEY2]              =*/ "key 2",
 210                 /*[WSI_TOKEN_PROTOCOL]          =*/ "Protocol",
 211                 /*[WSI_TOKEN_UPGRADE]           =*/ "Upgrade",
 212                 /*[WSI_TOKEN_ORIGIN]            =*/ "Origin",
 213                 /*[WSI_TOKEN_DRAFT]             =*/ "Draft",
 214                 /*[WSI_TOKEN_CHALLENGE]         =*/ "Challenge",
 215
 216                 /* new for 04 */
 217                 /*[WSI_TOKEN_KEY]               =*/ "Key",
 218                 /*[WSI_TOKEN_VERSION]           =*/ "Version",
 219                 /*[WSI_TOKEN_SWORIGIN]          =*/ "Sworigin",
 220
 221                 /* new for 05 */
 222                 /*[WSI_TOKEN_EXTENSIONS]        =*/ "Extensions",
 223
 224                 /* client receives these */
 225                 /*[WSI_TOKEN_ACCEPT]            =*/ "Accept",
 226                 /*[WSI_TOKEN_NONCE]             =*/ "Nonce",
 227                 /*[WSI_TOKEN_HTTP]              =*/ "Http",
 228                 /*[WSI_TOKEN_MUXURL]    =*/ "MuxURL",
 229         };
 230
 231         for (n = 0; n < WSI_TOKEN_COUNT; n++) {
 232                 if (lwst[n].token == NULL)
 233                         continue;
 234
 235                 fprintf(stderr, "    %s = %s\n", token_names[n], lwst[n].token);
 236         }
 237 }
 238
 239 /* dumb_increment protocol */
 240
 241 /*
 242  * one of these is auto-created for each connection and a pointer to the
 243  * appropriate instance is passed to the callback in the user parameter
 244  *
 245  * for this example protocol we use it to individualize the count for each
 246  * connection.
 247  */
 248
 249 struct per_session_data__dumb_increment {
 250         int number;
 251 };
 252
 253 static int
 254 callback_dumb_increment(struct libwebsocket_context *context,
 255                         struct libwebsocket *wsi,
 256                         enum libwebsocket_callback_reasons reason,
 257                                                void *user, void *in, size_t len)
 258 {
 259         int n;
 260         unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 512 +
 261                                                   LWS_SEND_BUFFER_POST_PADDING];
 262         unsigned char *p = &buf[LWS_SEND_BUFFER_PRE_PADDING];
 263         struct per_session_data__dumb_increment *pss = (struct per_session_data__dumb_increment *)user;
 264
 265         switch (reason) {
 266
 267         case LWS_CALLBACK_ESTABLISHED:
 268                 lwsl_info("callback_dumb_increment: "
 269                                                  "LWS_CALLBACK_ESTABLISHED\n");
 270                 pss->number = 0;
 271                 break;
 272
 273         case LWS_CALLBACK_SERVER_WRITEABLE:
 274                 n = sprintf((char *)p, "%d", pss->number++);
 275                 n = libwebsocket_write(wsi, p, n, LWS_WRITE_TEXT);
 276                 if (n < 0) {
 277                         lwsl_err("ERROR %d writing to socket\n", n);
 278                         return 1;
 279                 }
 280                 if (close_testing && pss->number == 50) {
 281                         lwsl_info("close tesing limit, closing\n");
 282                         libwebsocket_close_and_free_session(context, wsi,
 283                                                        LWS_CLOSE_STATUS_NORMAL);
 284                 }
 285                 break;
 286
 287         case LWS_CALLBACK_RECEIVE:
 288 //              fprintf(stderr, "rx %d\n", (int)len);
 289                 if (len < 6)
 290                         break;
 291                 if (strcmp((const char *)in, "reset\n") == 0)
 292                         pss->number = 0;
 293                 break;
 294         /*
 295          * this just demonstrates how to use the protocol filter. If you won't
 296          * study and reject connections based on header content, you don't need
 297          * to handle this callback
 298          */
 299
 300         case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
 301                 dump_handshake_info((struct lws_tokens *)(long)user);
 302                 /* you could return non-zero here and kill the connection */
 303                 break;
 304
 305         default:
 306                 break;
 307         }
 308
 309         return 0;
 310 }
 311
 312
 313 /* lws-mirror_protocol */
 314
 315 #define MAX_MESSAGE_QUEUE 128
 316
 317 struct per_session_data__lws_mirror {
 318         struct libwebsocket *wsi;
 319         int ringbuffer_tail;
 320 };
 321
 322 struct a_message {
 323         void *payload;
 324         size_t len;
 325 };
 326
 327 static struct a_message ringbuffer[MAX_MESSAGE_QUEUE];
 328 static int ringbuffer_head;
 329
 330 static struct libwebsocket *wsi_choked[20];
 331 static int num_wsi_choked;
 332
 333 static int
 334 callback_lws_mirror(struct libwebsocket_context *context,
 335                         struct libwebsocket *wsi,
 336                         enum libwebsocket_callback_reasons reason,
 337                                                void *user, void *in, size_t len)
 338 {
 339         int n;
 340         struct per_session_data__lws_mirror *pss = (struct per_session_data__lws_mirror *)user;
 341
 342         switch (reason) {
 343
 344         case LWS_CALLBACK_ESTABLISHED:
 345                 lwsl_info("callback_lws_mirror: "
 346                                                  "LWS_CALLBACK_ESTABLISHED\n");
 347                 pss->ringbuffer_tail = ringbuffer_head;
 348                 pss->wsi = wsi;
 349                 break;
 350
 351         case LWS_CALLBACK_SERVER_WRITEABLE:
 352                 if (close_testing)
 353                         break;
 354                 while (pss->ringbuffer_tail != ringbuffer_head) {
 355
 356                         n = libwebsocket_write(wsi, (unsigned char *)
 357                                    ringbuffer[pss->ringbuffer_tail].payload +
 358                                    LWS_SEND_BUFFER_PRE_PADDING,
 359                                    ringbuffer[pss->ringbuffer_tail].len,
 360                                                                 LWS_WRITE_TEXT);
 361                         if (n < 0) {
 362                                 lwsl_err("ERROR %d writing to socket\n", n);
 363                                 return 1;
 364                         }
 365
 366                         if (pss->ringbuffer_tail == (MAX_MESSAGE_QUEUE - 1))
 367                                 pss->ringbuffer_tail = 0;
 368                         else
 369                                 pss->ringbuffer_tail++;
 370
 371                         if (((ringbuffer_head - pss->ringbuffer_tail) &
 372                                   (MAX_MESSAGE_QUEUE - 1)) == (MAX_MESSAGE_QUEUE - 15)) {
 373                                 for (n = 0; n < num_wsi_choked; n++)
 374                                         libwebsocket_rx_flow_control(wsi_choked[n], 1);
 375                                 num_wsi_choked = 0;
 376                         }
 377                         // lwsl_debug("tx fifo %d\n", (ringbuffer_head - pss->ringbuffer_tail) & (MAX_MESSAGE_QUEUE - 1));
 378
 379                         if (lws_send_pipe_choked(wsi)) {
 380                                 libwebsocket_callback_on_writable(context, wsi);
 381                                 return 0;
 382                         }
 383                 }
 384                 break;
 385
 386         case LWS_CALLBACK_RECEIVE:
 387
 388                 if (((ringbuffer_head - pss->ringbuffer_tail) &
 389                                   (MAX_MESSAGE_QUEUE - 1)) == (MAX_MESSAGE_QUEUE - 1)) {
 390                         lwsl_err("dropping!\n");
 391                         goto choke;
 392                 }
 393
 394                 if (ringbuffer[ringbuffer_head].payload)
 395                         free(ringbuffer[ringbuffer_head].payload);
 396
 397                 ringbuffer[ringbuffer_head].payload =
 398                                 malloc(LWS_SEND_BUFFER_PRE_PADDING + len +
 399                                                   LWS_SEND_BUFFER_POST_PADDING);
 400                 ringbuffer[ringbuffer_head].len = len;
 401                 memcpy((char *)ringbuffer[ringbuffer_head].payload +
 402                                           LWS_SEND_BUFFER_PRE_PADDING, in, len);
 403                 if (ringbuffer_head == (MAX_MESSAGE_QUEUE - 1))
 404                         ringbuffer_head = 0;
 405                 else
 406                         ringbuffer_head++;
 407
 408                 if (((ringbuffer_head - pss->ringbuffer_tail) &
 409                                   (MAX_MESSAGE_QUEUE - 1)) != (MAX_MESSAGE_QUEUE - 2))
 410                         goto done;
 411
 412 choke:
 413                 if (num_wsi_choked < sizeof wsi_choked / sizeof wsi_choked[0]) {
 414                         libwebsocket_rx_flow_control(wsi, 0);
 415                         wsi_choked[num_wsi_choked++] = wsi;
 416                 }
 417
 418 //              lwsl_debug("rx fifo %d\n", (ringbuffer_head - pss->ringbuffer_tail) & (MAX_MESSAGE_QUEUE - 1));
 419 done:
 420                 libwebsocket_callback_on_writable_all_protocol(
 421                                                libwebsockets_get_protocol(wsi));
 422                 break;
 423
 424         /*
 425          * this just demonstrates how to use the protocol filter. If you won't
 426          * study and reject connections based on header content, you don't need
 427          * to handle this callback
 428          */
 429
 430         case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
 431                 dump_handshake_info((struct lws_tokens *)(long)user);
 432                 /* you could return non-zero here and kill the connection */
 433                 break;
 434
 435         default:
 436                 break;
 437         }
 438
 439         return 0;
 440 }
 441
 442
 443 /* list of supported protocols and callbacks */
 444
 445 static struct libwebsocket_protocols protocols[] = {
 446         /* first protocol must always be HTTP handler */
 447
 448         {
 449                 "http-only",            /* name */
 450                 callback_http,          /* callback */
 451                 0                       /* per_session_data_size */
 452         },
 453         {
 454                 "dumb-increment-protocol",
 455                 callback_dumb_increment,
 456                 sizeof(struct per_session_data__dumb_increment),
 457         },
 458         {
 459                 "lws-mirror-protocol",
 460                 callback_lws_mirror,
 461                 sizeof(struct per_session_data__lws_mirror)
 462         },
 463         {
 464                 NULL, NULL, 0           /* End of list */
 465         }
 466 };
 467
 468 void sighandler(int sig)
 469 {
 470         force_exit = 1;
 471 }
 472
 473 static struct option options[] = {
 474         { "help",       no_argument,            NULL, 'h' },
 475         { "debug",      required_argument,      NULL, 'd' },
 476         { "port",       required_argument,      NULL, 'p' },
 477         { "ssl",        no_argument,            NULL, 's' },
 478         { "interface",  required_argument,      NULL, 'i' },
 479         { "closetest",  no_argument,            NULL, 'c' },
 480 #ifndef LWS_NO_DAEMONIZE
 481         { "daemonize",  no_argument,            NULL, 'D' },
 482 #endif
 483         { NULL, 0, 0, 0 }
 484 };
 485
 486 int main(int argc, char **argv)
 487 {
 488         int n = 0;
 489         const char *cert_path =
 490                             LOCAL_RESOURCE_PATH"/libwebsockets-test-server.pem";
 491         const char *key_path =
 492                         LOCAL_RESOURCE_PATH"/libwebsockets-test-server.key.pem";
 493         int port = 7681;
 494         int use_ssl = 0;
 495         struct libwebsocket_context *context;
 496         int opts = 0;
 497         char interface_name[128] = "";
 498         const char *interface = NULL;
 499         int syslog_options = LOG_PID | LOG_PERROR;
 500         unsigned int oldus = 0;
 501
 502         int debug_level = 7;
 503 #ifndef LWS_NO_DAEMONIZE
 504         int daemonize = 0;
 505 #endif
 506
 507         while (n >= 0) {
 508                 n = getopt_long(argc, argv, "ci:hsp:d:D", options, NULL);
 509                 if (n < 0)
 510                         continue;
 511                 switch (n) {
 512 #ifndef LWS_NO_DAEMONIZE
 513                 case 'D':
 514                         daemonize = 1;
 515                         syslog_options &= ~LOG_PERROR;
 516                         break;
 517 #endif
 518                 case 'd':
 519                         debug_level = atoi(optarg);
 520                         break;
 521                 case 's':
 522                         use_ssl = 1;
 523                         break;
 524                 case 'p':
 525                         port = atoi(optarg);
 526                         break;
 527                 case 'i':
 528                         strncpy(interface_name, optarg, sizeof interface_name);
 529                         interface_name[(sizeof interface_name) - 1] = '\0';
 530                         interface = interface_name;
 531                         break;
 532                 case 'c':
 533                         close_testing = 1;
 534                         fprintf(stderr, " Close testing mode -- closes on "
 535                                            "client after 50 dumb increments"
 536                                            "and suppresses lws_mirror spam\n");
 537                         break;
 538                 case 'h':
 539                         fprintf(stderr, "Usage: test-server "
 540                                         "[--port=<p>] [--ssl] "
 541                                         "[-d <log bitfield>]\n");
 542                         exit(1);
 543                 }
 544         }
 545
 546 #ifndef LWS_NO_DAEMONIZE
 547         /*
 548          * normally lock path would be /var/lock/lwsts or similar, to
 549          * simplify getting started without having to take care about
 550          * permissions or running as root, set to /tmp/.lwsts-lock
 551          */
 552         if (daemonize && lws_daemonize("/tmp/.lwsts-lock")) {
 553                 fprintf(stderr, "Failed to daemonize\n");
 554                 return 1;
 555         }
 556 #endif
 557
 558         signal(SIGINT, sighandler);
 559
 560         /* we will only try to log things according to our debug_level */
 561         setlogmask(LOG_UPTO (LOG_DEBUG));
 562         openlog("lwsts", syslog_options, LOG_DAEMON);
 563
 564         /* tell the library what debug level to emit and to send it to syslog */
 565         lws_set_log_level(debug_level, lwsl_emit_syslog);
 566
 567         lwsl_notice("libwebsockets test server - "
 568                         "(C) Copyright 2010-2013 Andy Green <andy@warmcat.com> - "
 569                                                     "licensed under LGPL2.1\n");
 570         if (!use_ssl)
 571                 cert_path = key_path = NULL;
 572 #ifdef EXTERNAL_POLL
 573         max_poll_elements = getdtablesize();
 574         pollfds = malloc(max_poll_elements * sizeof (struct pollfd));
 575         fd_lookup = malloc(max_poll_elements * sizeof (int));
 576         if (pollfds == NULL || fd_lookup == NULL) {
 577                 lwsl_err("Out of memory pollfds=%d\n", max_poll_elements);
 578                 return -1;
 579         }
 580 #endif
 581
 582         context = libwebsocket_create_context(port, interface, protocols,
 583 #ifndef LWS_NO_EXTENSIONS
 584                                 libwebsocket_internal_extensions,
 585 #else
 586                                 NULL,
 587 #endif
 588                                 cert_path, key_path, NULL, -1, -1, opts, NULL);
 589         if (context == NULL) {
 590                 lwsl_err("libwebsocket init failed\n");
 591                 return -1;
 592         }
 593
 594         n = 0;
 595         while (n >= 0 && !force_exit) {
 596                 struct timeval tv;
 597
 598                 gettimeofday(&tv, NULL);
 599
 600                 /*
 601                  * This provokes the LWS_CALLBACK_SERVER_WRITEABLE for every
 602                  * live websocket connection using the DUMB_INCREMENT protocol,
 603                  * as soon as it can take more packets (usually immediately)
 604                  */
 605
 606                 if (((unsigned int)tv.tv_usec - oldus) > 50000) {
 607                         libwebsocket_callback_on_writable_all_protocol(&protocols[PROTOCOL_DUMB_INCREMENT]);
 608                         oldus = tv.tv_usec;
 609                 }
 610
 611 #ifdef EXTERNAL_POLL
 612
 613                 /*
 614                  * this represents an existing server's single poll action
 615                  * which also includes libwebsocket sockets
 616                  */
 617
 618                 n = poll(pollfds, count_pollfds, 50);
 619                 if (n < 0)
 620                         continue;
 621
 622
 623                 if (n)
 624                         for (n = 0; n < count_pollfds; n++)
 625                                 if (pollfds[n].revents)
 626                                         /*
 627                                         * returns immediately if the fd does not
 628                                         * match anything under libwebsockets
 629                                         * control
 630                                         */
 631                                         if (libwebsocket_service_fd(context,
 632                                                                   &pollfds[n]) < 0)
 633                                                 goto done;
 634 #else
 635                 /*
 636                  * If libwebsockets sockets are all we care about,
 637                  * you can use this api which takes care of the poll()
 638                  * and looping through finding who needed service.
 639                  *
 640                  * If no socket needs service, it'll return anyway after
 641                  * the number of ms in the second argument.
 642                  */
 643
 644                 n = libwebsocket_service(context, 50);
 645 #endif
 646         }
 647
 648 #ifdef EXTERNAL_POLL
 649 done:
 650 #endif
 651
 652         libwebsocket_context_destroy(context);
 653
 654         lwsl_notice("libwebsockets-test-server exited cleanly\n");
 655
 656         closelog();
 657
 658         return 0;
 659 }