예제 #1
0
LWS_VISIBLE struct libwebsocket_context *
libwebsocket_create_context(struct lws_context_creation_info *info)
{
	struct libwebsocket_context *context = NULL;
	char *p;

#ifndef LWS_NO_DAEMONIZE
	int pid_daemon = get_daemonize_pid();
#endif

	lwsl_notice("Initial logging level %d\n", log_level);
	lwsl_notice("Library version: %s\n", library_version);
#ifdef LWS_USE_IPV6
	if (!(info->options & LWS_SERVER_OPTION_DISABLE_IPV6))
		lwsl_notice("IPV6 compiled in and enabled\n");
	else
		lwsl_notice("IPV6 compiled in but disabled\n");
#else
	lwsl_notice("IPV6 not compiled in\n");
#endif
#ifdef LWS_USE_LIBEV
	if (info->options & LWS_SERVER_OPTION_LIBEV)
		lwsl_notice("libev support compiled in and enabled\n");
	else
		lwsl_notice("libev support compiled in but disabled\n");
#else
	lwsl_notice("libev support not compiled in\n");
#endif
	lwsl_info(" LWS_MAX_HEADER_LEN: %u\n", LWS_MAX_HEADER_LEN);
	lwsl_info(" LWS_MAX_PROTOCOLS: %u\n", LWS_MAX_PROTOCOLS);
#ifndef LWS_NO_EXTENSIONS
	lwsl_info(" LWS_MAX_EXTENSIONS_ACTIVE: %u\n",
						LWS_MAX_EXTENSIONS_ACTIVE);
#else
	lwsl_notice(" Configured without extension support\n");
#endif
	lwsl_info(" SPEC_LATEST_SUPPORTED: %u\n", SPEC_LATEST_SUPPORTED);
	lwsl_info(" AWAITING_TIMEOUT: %u\n", AWAITING_TIMEOUT);
	lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
	lwsl_info(" LWS_MAX_ZLIB_CONN_BUFFER: %u\n", LWS_MAX_ZLIB_CONN_BUFFER);

	if (lws_plat_context_early_init())
		return NULL;

	context = (struct libwebsocket_context *)
				malloc(sizeof(struct libwebsocket_context));
	if (!context) {
		lwsl_err("No memory for websocket context\n");
		return NULL;
	}
	memset(context, 0, sizeof(*context));
#ifndef LWS_NO_DAEMONIZE
	context->started_with_parent = pid_daemon;
	lwsl_notice(" Started with daemon pid %d\n", pid_daemon);
#endif

	context->listen_service_extraseen = 0;
	context->protocols = info->protocols;
	context->listen_port = info->port;
	context->http_proxy_port = 0;
	context->http_proxy_address[0] = '\0';
	context->options = info->options;
	context->iface = info->iface;
	/* to reduce this allocation, */
	context->max_fds = getdtablesize();
	lwsl_notice(" static allocation: %u + (%u x %u fds) = %u bytes\n",
		sizeof(struct libwebsocket_context),
		sizeof(struct libwebsocket_pollfd) +
					sizeof(struct libwebsocket *),
		context->max_fds,
		sizeof(struct libwebsocket_context) +
		((sizeof(struct libwebsocket_pollfd) +
					sizeof(struct libwebsocket *)) *
							     context->max_fds));

	context->fds = (struct libwebsocket_pollfd *)
				malloc(sizeof(struct libwebsocket_pollfd) *
							      context->max_fds);
	if (context->fds == NULL) {
		lwsl_err("Unable to allocate fds array for %d connections\n",
							      context->max_fds);
		free(context);
		return NULL;
	}

	context->lws_lookup = (struct libwebsocket **)
		      malloc(sizeof(struct libwebsocket *) * context->max_fds);
	if (context->lws_lookup == NULL) {
		lwsl_err(
		  "Unable to allocate lws_lookup array for %d connections\n",
							      context->max_fds);
		free(context->fds);
		free(context);
		return NULL;
	}
	memset(context->lws_lookup, 0, sizeof(struct libwebsocket *) *
							context->max_fds);

	if (lws_plat_init_fd_tables(context)) {
		free(context->lws_lookup);
		free(context->fds);
		free(context);
		return NULL;
	}

#ifndef LWS_NO_EXTENSIONS
	context->extensions = info->extensions;
#endif
	context->user_space = info->user;

	strcpy(context->canonical_hostname, "unknown");

#ifndef LWS_NO_SERVER
	if (!(info->options & LWS_SERVER_OPTION_SKIP_SERVER_CANONICAL_NAME)) {
		/* find canonical hostname */
		gethostname((char *)context->canonical_hostname,
				       sizeof(context->canonical_hostname) - 1);

		lwsl_notice(" canonical_hostname = %s\n",
					context->canonical_hostname);
	}
#endif

	/* split the proxy ads:port if given */

	if (info->http_proxy_address) {
		strncpy(context->http_proxy_address, info->http_proxy_address,
				      sizeof(context->http_proxy_address) - 1);
		context->http_proxy_address[
				sizeof(context->http_proxy_address) - 1] = '\0';
		context->http_proxy_port = info->http_proxy_port;
	} else {
#ifdef HAVE_GETENV
		p = getenv("http_proxy");
		if (p) {
			strncpy(context->http_proxy_address, p,
				       sizeof(context->http_proxy_address) - 1);
			context->http_proxy_address[
				sizeof(context->http_proxy_address) - 1] = '\0';

			p = strchr(context->http_proxy_address, ':');
			if (p == NULL) {
				lwsl_err("http_proxy needs to be ads:port\n");
				goto bail;
			}
			*p = '\0';
			context->http_proxy_port = atoi(p + 1);
		}
#endif
	}

	if (context->http_proxy_address[0])
		lwsl_notice(" Proxy %s:%u\n",
				context->http_proxy_address,
						      context->http_proxy_port);

	lwsl_notice(
		" per-conn mem: %u + %u headers + protocol rx buf\n",
				sizeof(struct libwebsocket),
					      sizeof(struct allocated_headers));
		
	if (lws_context_init_server_ssl(info, context))
		goto bail;
	
	if (lws_context_init_client_ssl(info, context))
		goto bail;

	if (lws_context_init_server(info, context))
		goto bail;

	/*
	 * drop any root privs for this process
	 * to listen on port < 1023 we would have needed root, but now we are
	 * listening, we don't want the power for anything else
	 */
	lws_plat_drop_app_privileges(info);

	/* initialize supported protocols */

	for (context->count_protocols = 0;
		info->protocols[context->count_protocols].callback;
						   context->count_protocols++) {

		lwsl_parser("  Protocol: %s\n",
				info->protocols[context->count_protocols].name);

		info->protocols[context->count_protocols].owning_server =
									context;
		info->protocols[context->count_protocols].protocol_index =
						       context->count_protocols;

		/*
		 * inform all the protocols that they are doing their one-time
		 * initialization if they want to
		 */
		info->protocols[context->count_protocols].callback(context,
			       NULL, LWS_CALLBACK_PROTOCOL_INIT, NULL, NULL, 0);
	}

	/*
	 * give all extensions a chance to create any per-context
	 * allocations they need
	 */

	if (info->port != CONTEXT_PORT_NO_LISTEN) {
		if (lws_ext_callback_for_each_extension_type(context, NULL,
				LWS_EXT_CALLBACK_SERVER_CONTEXT_CONSTRUCT,
								   NULL, 0) < 0)
			goto bail;
	} else
		if (lws_ext_callback_for_each_extension_type(context, NULL,
				LWS_EXT_CALLBACK_CLIENT_CONTEXT_CONSTRUCT,
								   NULL, 0) < 0)
			goto bail;

	return context;

bail:
	libwebsocket_context_destroy(context);
	return NULL;
}
예제 #2
0
LWS_VISIBLE struct lws_vhost *
lws_create_vhost(struct lws_context *context,
		 struct lws_context_creation_info *info)
{
	struct lws_vhost *vh = lws_zalloc(sizeof(*vh)),
			 **vh1 = &context->vhost_list;
	const struct lws_http_mount *mounts;
	const struct lws_protocol_vhost_options *pvo;
#ifdef LWS_WITH_PLUGINS
	struct lws_plugin *plugin = context->plugin_list;
	struct lws_protocols *lwsp;
	int m, f = !info->pvo;
#endif
#ifdef LWS_HAVE_GETENV
	char *p;
#endif
	int n;

	if (!vh)
		return NULL;

	if (!info->protocols)
		info->protocols = &protocols_dummy[0];

	vh->context = context;
	if (!info->vhost_name)
		vh->name = "default";
	else
		vh->name = info->vhost_name;

	vh->iface = info->iface;
	for (vh->count_protocols = 0;
	     info->protocols[vh->count_protocols].callback;
	     vh->count_protocols++)
		;

	vh->options = info->options;
	vh->pvo = info->pvo;
	vh->headers = info->headers;
	if (info->keepalive_timeout)
		vh->keepalive_timeout = info->keepalive_timeout;
	else
		vh->keepalive_timeout = 5;

#ifdef LWS_WITH_PLUGINS
	if (plugin) {
		/*
		 * give the vhost a unified list of protocols including the
		 * ones that came from plugins
		 */
		lwsp = lws_zalloc(sizeof(struct lws_protocols) *
					   (vh->count_protocols +
					   context->plugin_protocol_count + 1));
		if (!lwsp)
			return NULL;

		m = vh->count_protocols;
		memcpy(lwsp, info->protocols,
		       sizeof(struct lws_protocols) * m);

		/* for compatibility, all protocols enabled on vhost if only
		 * the default vhost exists.  Otherwise only vhosts who ask
		 * for a protocol get it enabled.
		 */

		if (info->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
			f = 0;

		while (plugin) {
			for (n = 0; n < plugin->caps.count_protocols; n++) {
				/*
				 * for compatibility's sake, no pvo implies
				 * allow all protocols
				 */
				if (f || lws_vhost_protocol_options(vh,
				    plugin->caps.protocols[n].name)) {
					memcpy(&lwsp[m],
					       &plugin->caps.protocols[n],
					       sizeof(struct lws_protocols));
					m++;
					vh->count_protocols++;
				}
			}
			plugin = plugin->list;
		}
		vh->protocols = lwsp;
	} else
#endif
		vh->protocols = info->protocols;

	vh->same_vh_protocol_list = (struct lws **)
			lws_zalloc(sizeof(struct lws *) * vh->count_protocols);

	vh->mount_list = info->mounts;

#ifdef LWS_USE_UNIX_SOCK
	if (LWS_UNIX_SOCK_ENABLED(context)) {
		lwsl_notice("Creating Vhost '%s' path \"%s\", %d protocols\n",
				vh->name, info->iface, vh->count_protocols);
	} else
#endif
	lwsl_notice("Creating Vhost '%s' port %d, %d protocols, IPv6 %s\n",
			vh->name, info->port, vh->count_protocols, LWS_IPV6_ENABLED(vh) ? "on" : "off");

	mounts = info->mounts;
	while (mounts) {
		lwsl_notice("   mounting %s%s to %s\n",
				mount_protocols[mounts->origin_protocol],
				mounts->origin, mounts->mountpoint);

		/* convert interpreter protocol names to pointers */
		pvo = mounts->interpret;
		while (pvo) {
			for (n = 0; n < vh->count_protocols; n++)
				if (!strcmp(pvo->value, vh->protocols[n].name)) {
					((struct lws_protocol_vhost_options *)pvo)->value =
							(const char *)(long)n;
					break;
				}
			if (n == vh->count_protocols)
				lwsl_err("ignoring unknown interpret protocol %s\n", pvo->value);
			pvo = pvo->next;
		}

		mounts = mounts->mount_next;
	}

#ifndef LWS_NO_EXTENSIONS
#ifdef LWS_WITH_PLUGINS
	if (context->plugin_extension_count) {

		m = 0;
		while (info->extensions && info->extensions[m].callback)
			m++;

		/*
		 * give the vhost a unified list of extensions including the
		 * ones that came from plugins
		 */
		vh->extensions = lws_zalloc(sizeof(struct lws_extension) *
					   (m +
					   context->plugin_extension_count + 1));
		if (!vh->extensions)
			return NULL;

		memcpy((struct lws_extension *)vh->extensions, info->extensions,
		       sizeof(struct lws_extension) * m);
		plugin = context->plugin_list;
		while (plugin) {
			memcpy((struct lws_extension *)&vh->extensions[m],
				plugin->caps.extensions,
			       sizeof(struct lws_extension) *
			       plugin->caps.count_extensions);
			m += plugin->caps.count_extensions;
			plugin = plugin->list;
		}
	} else
#endif
		vh->extensions = info->extensions;
#endif

	vh->listen_port = info->port;
#if !defined(LWS_WITH_ESP8266)
	vh->http_proxy_port = 0;
	vh->http_proxy_address[0] = '\0';

	/* either use proxy from info, or try get it from env var */

	if (info->http_proxy_address) {
		/* override for backwards compatibility */
		if (info->http_proxy_port)
			vh->http_proxy_port = info->http_proxy_port;
		lws_set_proxy(vh, info->http_proxy_address);
	} else {
#ifdef LWS_HAVE_GETENV
		p = getenv("http_proxy");
		if (p)
			lws_set_proxy(vh, p);
#endif
	}
#endif
	vh->ka_time = info->ka_time;
	vh->ka_interval = info->ka_interval;
	vh->ka_probes = info->ka_probes;

	if (vh->options & LWS_SERVER_OPTION_STS)
		lwsl_notice("   STS enabled\n");

#ifdef LWS_WITH_ACCESS_LOG
	if (info->log_filepath) {
		vh->log_fd = open(info->log_filepath, O_CREAT | O_APPEND | O_RDWR, 0600);
		if (vh->log_fd == (int)LWS_INVALID_FILE) {
			lwsl_err("unable to open log filepath %s\n",
				 info->log_filepath);
			goto bail;
		}
#ifndef WIN32
		if (context->uid != -1)
			if (chown(info->log_filepath, context->uid,
				  context->gid) == -1)
				lwsl_err("unable to chown log file %s\n",
						info->log_filepath);
#endif
	} else
		vh->log_fd = (int)LWS_INVALID_FILE;
#endif

	if (lws_context_init_server_ssl(info, vh))
		goto bail;

	if (lws_context_init_client_ssl(info, vh))
		goto bail;

	if (lws_context_init_server(info, vh))
		goto bail;

	while (1) {
		if (!(*vh1)) {
			*vh1 = vh;
			break;
		}
		vh1 = &(*vh1)->vhost_next;
	};

	return vh;

bail:
	lws_free(vh);

	return NULL;
}
예제 #3
0
LWS_VISIBLE struct lws_context *
lws_create_context(struct lws_context_creation_info *info)
{
	struct lws_context *context = NULL;
	struct lws wsi;
#ifndef LWS_NO_DAEMONIZE
	int pid_daemon = get_daemonize_pid();
#endif
	char *p;
	int n;

	lwsl_notice("Initial logging level %d\n", log_level);

	lwsl_notice("Libwebsockets version: %s\n", library_version);
#if LWS_POSIX
#ifdef LWS_USE_IPV6
	if (!(info->options & LWS_SERVER_OPTION_DISABLE_IPV6))
		lwsl_notice("IPV6 compiled in and enabled\n");
	else
		lwsl_notice("IPV6 compiled in but disabled\n");
#else
	lwsl_notice("IPV6 not compiled in\n");
#endif
	lws_feature_status_libev(info);
#endif
	lwsl_info(" LWS_MAX_HEADER_LEN: %u\n", LWS_MAX_HEADER_LEN);
	lwsl_info(" LWS_MAX_PROTOCOLS: %u\n", LWS_MAX_PROTOCOLS);

	lwsl_info(" SPEC_LATEST_SUPPORTED: %u\n", SPEC_LATEST_SUPPORTED);
	lwsl_info(" AWAITING_TIMEOUT: %u\n", AWAITING_TIMEOUT);
	lwsl_info(" sizeof (*info): %u\n", sizeof(*info));
#if LWS_POSIX
	lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
	lwsl_info(" LWS_MAX_ZLIB_CONN_BUFFER: %u\n", LWS_MAX_ZLIB_CONN_BUFFER);
#endif
	if (lws_plat_context_early_init())
		return NULL;

	context = lws_zalloc(sizeof(struct lws_context));
	if (!context) {
		lwsl_err("No memory for websocket context\n");
		return NULL;
	}
#ifndef LWS_NO_DAEMONIZE
	if (pid_daemon) {
		context->started_with_parent = pid_daemon;
		lwsl_notice(" Started with daemon pid %d\n", pid_daemon);
	}
#endif
	context->lserv_seen = 0;
	context->protocols = info->protocols;
	context->token_limits = info->token_limits;
	context->listen_port = info->port;
	context->http_proxy_port = 0;
	context->http_proxy_address[0] = '\0';
	context->options = info->options;
	context->iface = info->iface;
	context->ka_time = info->ka_time;
	context->ka_interval = info->ka_interval;
	context->ka_probes = info->ka_probes;

	memset(&wsi, 0, sizeof(wsi));
	wsi.context = context;

	if (!info->ka_interval && info->ka_time > 0) {
		lwsl_err("info->ka_interval can't be 0 if ka_time used\n");
		return NULL;
	}

#ifdef LWS_USE_LIBEV
	/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
	 * enable libev mediated SIGINT handling with a default handler of
	 * lws_sigint_cb. The handler can be overridden or disabled
	 * by invoking lws_sigint_cfg after creating the context, but
	 * before invoking lws_initloop:
	 */
	context->use_ev_sigint = 1;
	context->lws_ev_sigint_cb = &lws_sigint_cb;
#endif /* LWS_USE_LIBEV */

	lwsl_info(" mem: context:         %5u bytes\n", sizeof(struct lws_context));

	/*
	 * allocate and initialize the pool of
	 * allocated_header structs + data
	 */
	if (info->max_http_header_data)
		context->max_http_header_data = info->max_http_header_data;
	else
		context->max_http_header_data = LWS_MAX_HEADER_LEN;
	if (info->max_http_header_pool)
		context->max_http_header_pool = info->max_http_header_pool;
	else
		context->max_http_header_pool = LWS_MAX_HEADER_POOL;

	context->http_header_data = lws_malloc(context->max_http_header_data *
					       context->max_http_header_pool);
	if (!context->http_header_data)
		goto bail;
	context->ah_pool = lws_zalloc(sizeof(struct allocated_headers) *
				      context->max_http_header_pool);
	if (!context->ah_pool)
		goto bail;

	for (n = 0; n < context->max_http_header_pool; n++)
		context->ah_pool[n].data = (char *)context->http_header_data +
			(n * context->max_http_header_data);

	/* this is per context */
	lwsl_info(" mem: http hdr rsvd:   %5u bytes ((%u + %u) x %u)\n",
		    (context->max_http_header_data + sizeof(struct allocated_headers)) *
		    context->max_http_header_pool,
		    context->max_http_header_data, sizeof(struct allocated_headers),
		    context->max_http_header_pool);

	context->max_fds = getdtablesize();

	context->fds = lws_zalloc(sizeof(struct lws_pollfd) * context->max_fds);
	if (context->fds == NULL) {
		lwsl_err("OOM allocating %d fds\n", context->max_fds);
		goto bail;
	}

	lwsl_info(" mem: pollfd map:      %5u\n",
		    sizeof(struct lws_pollfd) * context->max_fds);

	if (lws_plat_init(context, info))
		goto bail;

	lws_context_init_extensions(info, context);

	context->user_space = info->user;

	lwsl_notice(" mem: per-conn:        %5u bytes + protocol rx buf\n",
		    sizeof(struct lws));

	strcpy(context->canonical_hostname, "unknown");
	lws_server_get_canonical_hostname(context, info);

	/* either use proxy from info, or try get it from env var */

	if (info->http_proxy_address) {
		/* override for backwards compatibility */
		if (info->http_proxy_port)
			context->http_proxy_port = info->http_proxy_port;
		lws_set_proxy(context, info->http_proxy_address);
	} else {
#ifdef LWS_HAVE_GETENV
		p = getenv("http_proxy");
		if (p)
			lws_set_proxy(context, p);
#endif
	}

	if (lws_context_init_server_ssl(info, context))
		goto bail;

	if (lws_context_init_client_ssl(info, context))
		goto bail;

	if (lws_context_init_server(info, context))
		goto bail;

	/*
	 * drop any root privs for this process
	 * to listen on port < 1023 we would have needed root, but now we are
	 * listening, we don't want the power for anything else
	 */
	lws_plat_drop_app_privileges(info);

	/* initialize supported protocols */

	for (context->count_protocols = 0;
	     info->protocols[context->count_protocols].callback;
	     context->count_protocols++)
		/*
		 * inform all the protocols that they are doing their one-time
		 * initialization if they want to.
		 *
		 * NOTE the wsi is all zeros except for the context pointer
		 * so lws_get_context(wsi) can work in the callback.
		 */
		info->protocols[context->count_protocols].callback(&wsi,
				LWS_CALLBACK_PROTOCOL_INIT, NULL, NULL, 0);

	/*
	 * give all extensions a chance to create any per-context
	 * allocations they need
	 */
	if (info->port != CONTEXT_PORT_NO_LISTEN) {
		if (lws_ext_cb_all_exts(context, NULL,
			LWS_EXT_CALLBACK_SERVER_CONTEXT_CONSTRUCT, NULL, 0) < 0)
			goto bail;
	} else
		if (lws_ext_cb_all_exts(context, NULL,
			LWS_EXT_CALLBACK_CLIENT_CONTEXT_CONSTRUCT, NULL, 0) < 0)
			goto bail;

	return context;

bail:
	lws_context_destroy(context);
	return NULL;
}
예제 #4
0
LWS_VISIBLE struct libwebsocket_context *
libwebsocket_create_context(struct lws_context_creation_info *info)
{
	struct libwebsocket_context *context = NULL;
	char *p;
#ifdef _WIN32
	int i;
#endif
	int pid_daemon = get_daemonize_pid();

	lwsl_notice("Initial logging level %d\n", log_level);
	lwsl_notice("Library version: %s\n", library_version);
#ifdef LWS_USE_IPV6
	if (!(info->options & LWS_SERVER_OPTION_DISABLE_IPV6))
		lwsl_notice("IPV6 compiled in and enabled\n");
	else
		lwsl_notice("IPV6 compiled in but disabled\n");
#else
	lwsl_notice("IPV6 not compiled in\n");
#endif
	lws_feature_status_libev(info);
	lwsl_info(" LWS_MAX_HEADER_LEN: %u\n", LWS_MAX_HEADER_LEN);
	lwsl_info(" LWS_MAX_PROTOCOLS: %u\n", LWS_MAX_PROTOCOLS);

	lwsl_info(" SPEC_LATEST_SUPPORTED: %u\n", SPEC_LATEST_SUPPORTED);
	lwsl_info(" AWAITING_TIMEOUT: %u\n", AWAITING_TIMEOUT);
	lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
	lwsl_info(" LWS_MAX_ZLIB_CONN_BUFFER: %u\n", LWS_MAX_ZLIB_CONN_BUFFER);

	if (lws_plat_context_early_init())
		return NULL;

	context = lws_zalloc(sizeof(struct libwebsocket_context));
	if (!context) {
		lwsl_err("No memory for websocket context\n");
		return NULL;
	}

	if (pid_daemon) {
		context->started_with_parent = pid_daemon;
		lwsl_notice(" Started with daemon pid %d\n", pid_daemon);
	}

	context->listen_service_extraseen = 0;
	context->protocols = info->protocols;
	context->token_limits = info->token_limits;
	context->listen_port = info->port;
	context->http_proxy_port = 0;
	context->http_proxy_address[0] = '\0';
	context->options = info->options;
	context->iface = info->iface;
	context->ka_time = info->ka_time;
	context->ka_interval = info->ka_interval;
	context->ka_probes = info->ka_probes;

	if (!info->ka_interval && info->ka_time > 0) {
		lwsl_err("info->ka_interval can't be 0 if ka_time used\n");
		return NULL;
	}
	
#ifdef LWS_USE_LIBEV
	/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
	 * enable libev mediated SIGINT handling with a default handler of
	 * libwebsocket_sigint_cb. The handler can be overridden or disabled
	 * by invoking libwebsocket_sigint_cfg after creating the context, but
	 * before invoking libwebsocket_initloop:
	 */
	context->use_ev_sigint = 1;
	context->lws_ev_sigint_cb = &libwebsocket_sigint_cb;
#endif /* LWS_USE_LIBEV */


	/* to reduce this allocation, */
	context->max_fds = getdtablesize();
	lwsl_notice(" static allocation: %u + (%u x %u fds) = %u bytes\n",
		sizeof(struct libwebsocket_context),
		sizeof(struct libwebsocket_pollfd) +
					sizeof(struct libwebsocket *),
		context->max_fds,
		sizeof(struct libwebsocket_context) +
		((sizeof(struct libwebsocket_pollfd) +
					sizeof(struct libwebsocket *)) *
							     context->max_fds));

	context->fds = lws_zalloc(sizeof(struct libwebsocket_pollfd) *
				  context->max_fds);
	if (context->fds == NULL) {
		lwsl_err("Unable to allocate fds array for %d connections\n",
							      context->max_fds);
		goto bail;
	}

	if (lws_plat_init_lookup(context)) {
		goto bail;
	}

	if (lws_plat_init_fd_tables(context)) {
		goto bail;
	}

	lws_context_init_extensions(info, context);

	context->user_space = info->user;

	strcpy(context->canonical_hostname, "unknown");

	lws_server_get_canonical_hostname(context, info);

	/* split the proxy ads:port if given */

	if (info->http_proxy_address) {
		strncpy(context->http_proxy_address, info->http_proxy_address,
				      sizeof(context->http_proxy_address) - 1);
		context->http_proxy_address[
				sizeof(context->http_proxy_address) - 1] = '\0';
		context->http_proxy_port = info->http_proxy_port;
	} else {
#ifdef LWS_HAVE_GETENV
		p = getenv("http_proxy");
		if (p) {
			strncpy(context->http_proxy_address, p,
				       sizeof(context->http_proxy_address) - 1);
			context->http_proxy_address[
				sizeof(context->http_proxy_address) - 1] = '\0';

			p = strchr(context->http_proxy_address, ':');
			if (p == NULL) {
				lwsl_err("http_proxy needs to be ads:port\n");
				goto bail;
			}
			*p = '\0';
			context->http_proxy_port = atoi(p + 1);
		}
#endif
	}

	if (context->http_proxy_address[0])
		lwsl_notice(" Proxy %s:%u\n",
				context->http_proxy_address,
						      context->http_proxy_port);

	lwsl_notice(
		" per-conn mem: %u + %u headers + protocol rx buf\n",
				sizeof(struct libwebsocket),
					      sizeof(struct allocated_headers));

	if (lws_context_init_server_ssl(info, context))
		goto bail;

	if (lws_context_init_client_ssl(info, context))
		goto bail;

	if (lws_context_init_server(info, context))
		goto bail;

	/*
	 * drop any root privs for this process
	 * to listen on port < 1023 we would have needed root, but now we are
	 * listening, we don't want the power for anything else
	 */
	lws_plat_drop_app_privileges(info);

	/* initialize supported protocols */

	for (context->count_protocols = 0;
		info->protocols[context->count_protocols].callback;
						   context->count_protocols++) {

		lwsl_parser("  Protocol: %s\n",
				info->protocols[context->count_protocols].name);

		info->protocols[context->count_protocols].owning_server =
									context;
		info->protocols[context->count_protocols].protocol_index =
						       context->count_protocols;

		/*
		 * inform all the protocols that they are doing their one-time
		 * initialization if they want to
		 */
		info->protocols[context->count_protocols].callback(context,
			       NULL, LWS_CALLBACK_PROTOCOL_INIT, NULL, NULL, 0);
	}

	/*
	 * give all extensions a chance to create any per-context
	 * allocations they need
	 */

	if (info->port != CONTEXT_PORT_NO_LISTEN) {
		if (lws_ext_callback_for_each_extension_type(context, NULL,
				LWS_EXT_CALLBACK_SERVER_CONTEXT_CONSTRUCT,
								   NULL, 0) < 0)
			goto bail;
	} else
		if (lws_ext_callback_for_each_extension_type(context, NULL,
				LWS_EXT_CALLBACK_CLIENT_CONTEXT_CONSTRUCT,
								   NULL, 0) < 0)
			goto bail;

	return context;

bail:
	libwebsocket_context_destroy(context);
	return NULL;
}