minimal-examples/secure-streams/minimal-secure-streams-metadata/minimal-secure-streams.c - platform/external/libwebsockets - Git at Google

 /*
  * lws-minimal-secure-streams-metadata
  *
  * Written in 2010-2020 by Andy Green <[email protected]>
  *
  * This file is made available under the Creative Commons CC0 1.0
  * Universal Public Domain Dedication.
  *
  *
  * This demonstrates a minimal http client using secure streams api.
  *
  * It visits https://warmcat.com/ and receives the html page there.
  *
  * This example is built two different ways from the same source... one includes
  * the policy everything needed to fulfil the stream directly.  The other -client
  * variant has no policy itself and some other minor init changes, and connects
  * to the -proxy example to actually get the connection done.
  *
  * In the -client build case, the example does not even init the tls libraries
  * since the proxy part will take care of all that.
  */

 #include <libwebsockets.h>
 #include <string.h>
 #include <signal.h>

 /*
  * uncomment to force network traffic through 127.0.0.1:1080
  *
  * On your local machine, you can run a SOCKS5 proxy like this
  *
  * $ ssh -N -D 0.0.0.0:1080 localhost -v
  *
  * If enabled, this also fetches a remote policy that also
  * specifies that all traffic should go through the remote
  * proxy.
  */
 // #define VIA_LOCALHOST_SOCKS

 static int interrupted, bad = 1, force_cpd_fail_portal,
 	   force_cpd_fail_no_internet;
 static lws_state_notify_link_t nl;
 static const char *server_name_or_url = "warmcat.com";

 /*
  * If the -proxy app is fulfilling our connection, then we don't need to have
  * the policy in the client.
  *
  * When we build with LWS_SS_USE_SSPC, the apis hook up to a proxy process over
  * a Unix Domain Socket.  To test that, you need to separately run the
  * ./lws-minimal-secure-streams-proxy test app on the same machine.
  */

 #if !defined(LWS_SS_USE_SSPC)
 static const char * const default_ss_policy =
 	"{"
 	  "\"release\":"			"\"01234567\","
 	  "\"product\":"			"\"myproduct\","
 	  "\"schema-version\":"			"1,"
 #if defined(VIA_LOCALHOST_SOCKS)
 	  "\"via-socks5\":"                     "\"127.0.0.1:1080\","
 #endif

 	  "\"retry\": ["	/* named backoff / retry strategies */
 		"{\"default\": {"
 			"\"backoff\": ["	 "1000,"
 						 "2000,"
 						 "3000,"
 						 "5000,"
 						"10000"
 				"],"
 			"\"conceal\":"		"5,"
 			"\"jitterpc\":"		"20,"
 			"\"svalidping\":"	"30,"
 			"\"svalidhup\":"	"35"
 		"}}"
 	  "],"
 	  "\"certs\": [" /* named individual certificates in BASE64 DER */
 		/*
 		 * Let's Encrypt certs for warmcat.com / libwebsockets.org
 		 *
 		 * We fetch the real policy from there using SS and switch to
 		 * using that.
 		 */
 		"{\"isrg_root_x1\": \""
 "MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw"
 "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh"
 "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4"
 "WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu"
 "ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY"
 "MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc"
 "h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+"
 "0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U"
 "A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW"
 "T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH"
 "B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC"
 "B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv"
 "KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn"
 "OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn"
 "jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw"
 "qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI"
 "rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV"
 "HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq"
 "hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL"
 "ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ"
 "3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK"
 "NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5"
 "ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur"
 "TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC"
 "jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc"
 "oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq"
 "4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA"
 "mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d"
 "emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc="
 	  "\"}"
 	  "],"
 	  "\"trust_stores\": [" /* named cert chains */
 		"{"
 			"\"name\": \"le_via_isrg\","
 			"\"stack\": ["
 				"\"isrg_root_x1\""
 			"]"
 		"}"
 	  "],"
 	  "\"s\": ["
 		"{\"mintest\": {"
 			"\"endpoint\":"		"\"${servername}\","
 			"\"port\":"		"443,"
 			"\"protocol\":"		"\"h1\","
 			"\"http_method\":"	"\"GET\","
 			"\"http_url\":"		"\"\","
 			"\"tls\":"		"true,"
 			"\"opportunistic\":"	"true,"
 			"\"retry\":"		"\"default\","
 			"\"tls_trust_store\":"	"\"le_via_isrg\","
 			"\"metadata\": ["
 				"{\"servername\": \"\"}"
 			"]"
 		"}}"
 	"]}"
 ;

 #endif

 typedef struct myss {
 	struct lws_ss_handle 		*ss;
 	void				*opaque_data;
 	/* ... application specific state ... */
 	lws_sorted_usec_list_t		sul;
 } myss_t;

 /* secure streams payload interface */

 static lws_ss_state_return_t
 myss_rx(void *userobj, const uint8_t *buf, size_t len, int flags)
 {
 //	myss_t *m = (myss_t *)userobj;

 	lwsl_user("%s: len %d, flags: %d\n", __func__, (int)len, flags);
 	lwsl_hexdump_info(buf, len);

 	/*
 	 * If we received the whole message, for our example it means
 	 * we are done.
 	 */
 	if (flags & LWSSS_FLAG_EOM) {
 		bad = 0;
 		interrupted = 1;
 	}

 	return 0;
 }

 static lws_ss_state_return_t
 myss_tx(void *userobj, lws_ss_tx_ordinal_t ord, uint8_t *buf, size_t *len,
 	int *flags)
 {
 	//myss_t *m = (myss_t *)userobj;

 	return 0;
 }

 static lws_ss_state_return_t
 myss_state(void *userobj, void *sh, lws_ss_constate_t state,
 	   lws_ss_tx_ordinal_t ack)
 {
 	myss_t *m = (myss_t *)userobj;

 	lwsl_user("%s: %s, ord 0x%x\n", __func__, lws_ss_state_name((int)state),
 		  (unsigned int)ack);

 	switch (state) {
 	case LWSSSCS_CREATING:
 		lwsl_notice("%s: CREATING: setting servername metadata to %s\n",
 				__func__, server_name_or_url);
 		if (lws_ss_set_metadata(m->ss, "servername", server_name_or_url,
 					strlen(server_name_or_url)))
 			return LWSSSSRET_DISCONNECT_ME;
 		return lws_ss_client_connect(m->ss);

 	case LWSSSCS_ALL_RETRIES_FAILED:
 		/* if we're out of retries, we want to close the app and FAIL */
 		interrupted = 1;
 		break;
 	case LWSSSCS_QOS_ACK_REMOTE:
 		lwsl_notice("%s: LWSSSCS_QOS_ACK_REMOTE\n", __func__);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static int
 app_system_state_nf(lws_state_manager_t *mgr, lws_state_notify_link_t *link,
 		    int current, int target)
 {
 	struct lws_context *context = lws_system_context_from_system_mgr(mgr);

 	/*
 	 * For the things we care about, let's notice if we are trying to get
 	 * past them when we haven't solved them yet, and make the system
 	 * state wait while we trigger the dependent action.
 	 */
 	switch (target) {

 	case LWS_SYSTATE_OPERATIONAL:
 		if (current == LWS_SYSTATE_OPERATIONAL) {
 			lws_ss_info_t ssi;

 			/* We're making an outgoing secure stream ourselves */

 			memset(&ssi, 0, sizeof(ssi));
 			ssi.handle_offset = offsetof(myss_t, ss);
 			ssi.opaque_user_data_offset = offsetof(myss_t,
 							       opaque_data);
 			ssi.rx = myss_rx;
 			ssi.tx = myss_tx;
 			ssi.state = myss_state;
 			ssi.user_alloc = sizeof(myss_t);
 			ssi.streamtype = "mintest";

 			if (lws_ss_create(context, 0, &ssi, NULL, NULL,
 					  NULL, NULL)) {
 				lwsl_err("%s: failed to create secure stream\n",
 					 __func__);
 				return -1;
 			}
 		}
 		break;
 	}

 	return 0;
 }

 static lws_state_notify_link_t * const app_notifier_list[] = {
 	&nl, NULL
 };

 static void
 sigint_handler(int sig)
 {
 	interrupted = 1;
 }

 int main(int argc, const char **argv)
 {
 	struct lws_context_creation_info info;
 	struct lws_context *context;
 	const char *p;
 	int n = 0;

 	signal(SIGINT, sigint_handler);

 	memset(&info, 0, sizeof info);
 	lws_cmdline_option_handle_builtin(argc, argv, &info);

 	lwsl_user("LWS secure streams test client [-d<verb>]\n");

 	/* these options are mutually exclusive if given */

 	if (lws_cmdline_option(argc, argv, "--force-portal"))
 		force_cpd_fail_portal = 1;

 	if (lws_cmdline_option(argc, argv, "--force-no-internet"))
 		force_cpd_fail_no_internet = 1;

 	info.fd_limit_per_thread = 1 + 6 + 1;
 	info.port = CONTEXT_PORT_NO_LISTEN;

 #if defined(LWS_SS_USE_SSPC)
 	info.protocols = lws_sspc_protocols;

 	/* connect to ssproxy via UDS by default, else via
 	 * tcp connection to this port */
 	if ((p = lws_cmdline_option(argc, argv, "-p")))
 		info.ss_proxy_port = (uint16_t)atoi(p);

 	/* UDS "proxy.ss.lws" in abstract namespace, else this socket
 	 * path; when -p given this can specify the network interface
 	 * to bind to */
 	if ((p = lws_cmdline_option(argc, argv, "-i")))
 		info.ss_proxy_bind = p;

 	/* if -p given, -a specifies the proxy address to connect to */
 	if ((p = lws_cmdline_option(argc, argv, "-a")))
 		info.ss_proxy_address = p;
 #else
 	info.pss_policies_json = default_ss_policy;
 	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS |
 		       LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
 #endif

 	if ((p = lws_cmdline_option(argc, argv, "-u")))
 		server_name_or_url = p;

 	/* integrate us with lws system state management when context created */

 	nl.name = "app";
 	nl.notify_cb = app_system_state_nf;
 	info.register_notifier_list = app_notifier_list;

 	/* create the context */

 	context = lws_create_context(&info);
 	if (!context) {
 		lwsl_err("lws init failed\n");
 		return 1;
 	}


 	/* the event loop */

 	while (n >= 0 && !interrupted)
 		n = lws_service(context, 0);

 	lws_context_destroy(context);

 	lwsl_user("Completed: %s\n", bad ? "failed" : "OK");

 	return bad;
 }
	/*
	* lws-minimal-secure-streams-metadata
	*
	* Written in 2010-2020 by Andy Green <[email protected]>
	*
	* This file is made available under the Creative Commons CC0 1.0
	* Universal Public Domain Dedication.
	*
	*
	* This demonstrates a minimal http client using secure streams api.
	*
	* It visits https://warmcat.com/ and receives the html page there.
	*
	* This example is built two different ways from the same source... one includes
	* the policy everything needed to fulfil the stream directly. The other -client
	* variant has no policy itself and some other minor init changes, and connects
	* to the -proxy example to actually get the connection done.
	*
	* In the -client build case, the example does not even init the tls libraries
	* since the proxy part will take care of all that.
	*/

	#include <libwebsockets.h>
	#include <string.h>
	#include <signal.h>

	/*
	* uncomment to force network traffic through 127.0.0.1:1080
	*
	* On your local machine, you can run a SOCKS5 proxy like this
	*
	* $ ssh -N -D 0.0.0.0:1080 localhost -v
	*
	* If enabled, this also fetches a remote policy that also
	* specifies that all traffic should go through the remote
	* proxy.
	*/
	// #define VIA_LOCALHOST_SOCKS

	static int interrupted, bad = 1, force_cpd_fail_portal,
	force_cpd_fail_no_internet;
	static lws_state_notify_link_t nl;
	static const char *server_name_or_url = "warmcat.com";

	/*
	* If the -proxy app is fulfilling our connection, then we don't need to have
	* the policy in the client.
	*
	* When we build with LWS_SS_USE_SSPC, the apis hook up to a proxy process over
	* a Unix Domain Socket. To test that, you need to separately run the
	* ./lws-minimal-secure-streams-proxy test app on the same machine.
	*/

	#if !defined(LWS_SS_USE_SSPC)
	static const char * const default_ss_policy =
	"{"
	"\"release\":" "\"01234567\","
	"\"product\":" "\"myproduct\","
	"\"schema-version\":" "1,"
	#if defined(VIA_LOCALHOST_SOCKS)
	"\"via-socks5\":" "\"127.0.0.1:1080\","
	#endif

	"\"retry\": [" /* named backoff / retry strategies */
	"{\"default\": {"
	"\"backoff\": [" "1000,"
	"2000,"
	"3000,"
	"5000,"
	"10000"
	"],"
	"\"conceal\":" "5,"
	"\"jitterpc\":" "20,"
	"\"svalidping\":" "30,"
	"\"svalidhup\":" "35"
	"}}"
	"],"
	"\"certs\": [" /* named individual certificates in BASE64 DER */
	/*
	* Let's Encrypt certs for warmcat.com / libwebsockets.org
	*
	* We fetch the real policy from there using SS and switch to
	* using that.
	*/
	"{\"isrg_root_x1\": \""
	"MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw"
	"TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh"
	"cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4"
	"WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu"
	"ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY"
	"MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc"
	"h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+"
	"0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U"
	"A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW"
	"T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH"
	"B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC"
	"B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv"
	"KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn"
	"OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn"
	"jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw"
	"qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI"
	"rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV"
	"HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq"
	"hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL"
	"ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ"
	"3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK"
	"NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5"
	"ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur"
	"TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC"
	"jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc"
	"oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq"
	"4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA"
	"mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d"
	"emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc="
	"\"}"
	"],"
	"\"trust_stores\": [" /* named cert chains */
	"{"
	"\"name\": \"le_via_isrg\","
	"\"stack\": ["
	"\"isrg_root_x1\""
	"]"
	"}"
	"],"
	"\"s\": ["
	"{\"mintest\": {"
	"\"endpoint\":" "\"${servername}\","
	"\"port\":" "443,"
	"\"protocol\":" "\"h1\","
	"\"http_method\":" "\"GET\","
	"\"http_url\":" "\"\","
	"\"tls\":" "true,"
	"\"opportunistic\":" "true,"
	"\"retry\":" "\"default\","
	"\"tls_trust_store\":" "\"le_via_isrg\","
	"\"metadata\": ["
	"{\"servername\": \"\"}"
	"]"
	"}}"
	"]}"
	;

	#endif

	typedef struct myss {
	struct lws_ss_handle *ss;
	void *opaque_data;
	/* ... application specific state ... */
	lws_sorted_usec_list_t sul;
	} myss_t;

	/* secure streams payload interface */

	static lws_ss_state_return_t
	myss_rx(void userobj, const uint8_t buf, size_t len, int flags)
	{
	// myss_t m = (myss_t )userobj;

	lwsl_user("%s: len %d, flags: %d\n", __func__, (int)len, flags);
	lwsl_hexdump_info(buf, len);

	/*
	* If we received the whole message, for our example it means
	* we are done.
	*/
	if (flags & LWSSS_FLAG_EOM) {
	bad = 0;
	interrupted = 1;
	}

	return 0;
	}

	static lws_ss_state_return_t
	myss_tx(void userobj, lws_ss_tx_ordinal_t ord, uint8_t buf, size_t *len,
	int *flags)
	{
	//myss_t m = (myss_t )userobj;

	return 0;
	}

	static lws_ss_state_return_t
	myss_state(void userobj, void sh, lws_ss_constate_t state,
	lws_ss_tx_ordinal_t ack)
	{
	myss_t m = (myss_t )userobj;

	lwsl_user("%s: %s, ord 0x%x\n", __func__, lws_ss_state_name((int)state),
	(unsigned int)ack);

	switch (state) {
	case LWSSSCS_CREATING:
	lwsl_notice("%s: CREATING: setting servername metadata to %s\n",
	__func__, server_name_or_url);
	if (lws_ss_set_metadata(m->ss, "servername", server_name_or_url,
	strlen(server_name_or_url)))
	return LWSSSSRET_DISCONNECT_ME;
	return lws_ss_client_connect(m->ss);

	case LWSSSCS_ALL_RETRIES_FAILED:
	/* if we're out of retries, we want to close the app and FAIL */
	interrupted = 1;
	break;
	case LWSSSCS_QOS_ACK_REMOTE:
	lwsl_notice("%s: LWSSSCS_QOS_ACK_REMOTE\n", __func__);
	break;
	default:
	break;
	}

	return 0;
	}

	static int
	app_system_state_nf(lws_state_manager_t mgr, lws_state_notify_link_t link,
	int current, int target)
	{
	struct lws_context *context = lws_system_context_from_system_mgr(mgr);

	/*
	* For the things we care about, let's notice if we are trying to get
	* past them when we haven't solved them yet, and make the system
	* state wait while we trigger the dependent action.
	*/
	switch (target) {

	case LWS_SYSTATE_OPERATIONAL:
	if (current == LWS_SYSTATE_OPERATIONAL) {
	lws_ss_info_t ssi;

	/* We're making an outgoing secure stream ourselves */

	memset(&ssi, 0, sizeof(ssi));
	ssi.handle_offset = offsetof(myss_t, ss);
	ssi.opaque_user_data_offset = offsetof(myss_t,
	opaque_data);
	ssi.rx = myss_rx;
	ssi.tx = myss_tx;
	ssi.state = myss_state;
	ssi.user_alloc = sizeof(myss_t);
	ssi.streamtype = "mintest";

	if (lws_ss_create(context, 0, &ssi, NULL, NULL,
	NULL, NULL)) {
	lwsl_err("%s: failed to create secure stream\n",
	__func__);
	return -1;
	}
	}
	break;
	}

	return 0;
	}

	static lws_state_notify_link_t * const app_notifier_list[] = {
	&nl, NULL
	};

	static void
	sigint_handler(int sig)
	{
	interrupted = 1;
	}

	int main(int argc, const char **argv)
	{
	struct lws_context_creation_info info;
	struct lws_context *context;
	const char *p;
	int n = 0;

	signal(SIGINT, sigint_handler);

	memset(&info, 0, sizeof info);
	lws_cmdline_option_handle_builtin(argc, argv, &info);

	lwsl_user("LWS secure streams test client [-d<verb>]\n");

	/* these options are mutually exclusive if given */

	if (lws_cmdline_option(argc, argv, "--force-portal"))
	force_cpd_fail_portal = 1;

	if (lws_cmdline_option(argc, argv, "--force-no-internet"))
	force_cpd_fail_no_internet = 1;

	info.fd_limit_per_thread = 1 + 6 + 1;
	info.port = CONTEXT_PORT_NO_LISTEN;

	#if defined(LWS_SS_USE_SSPC)
	info.protocols = lws_sspc_protocols;

	/* connect to ssproxy via UDS by default, else via
	* tcp connection to this port */
	if ((p = lws_cmdline_option(argc, argv, "-p")))
	info.ss_proxy_port = (uint16_t)atoi(p);

	/* UDS "proxy.ss.lws" in abstract namespace, else this socket
	* path; when -p given this can specify the network interface
	* to bind to */
	if ((p = lws_cmdline_option(argc, argv, "-i")))
	info.ss_proxy_bind = p;

	/* if -p given, -a specifies the proxy address to connect to */
	if ((p = lws_cmdline_option(argc, argv, "-a")))
	info.ss_proxy_address = p;
	#else
	info.pss_policies_json = default_ss_policy;
	info.options = LWS_SERVER_OPTION_EXPLICIT_VHOSTS \|
	LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
	#endif

	if ((p = lws_cmdline_option(argc, argv, "-u")))
	server_name_or_url = p;

	/* integrate us with lws system state management when context created */

	nl.name = "app";
	nl.notify_cb = app_system_state_nf;
	info.register_notifier_list = app_notifier_list;

	/* create the context */

	context = lws_create_context(&info);
	if (!context) {
	lwsl_err("lws init failed\n");
	return 1;
	}


	/* the event loop */

	while (n >= 0 && !interrupted)
	n = lws_service(context, 0);

	lws_context_destroy(context);

	lwsl_user("Completed: %s\n", bad ? "failed" : "OK");

	return bad;
	}