[Tizen] Introduce network service discovery

This patch introduces network service discovery to Tizen service. NSD will be used to set ip and port automatically. Signed-off-by: Yelin Jeong <[email protected]>
nnstreamer · Jul 8, 2024 · 4667c9a · 4667c9a
1 parent 80dcd1b
commit 4667c9a
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Showing 2 changed files with 105 additions and 11 deletions.
diff --git a/Tizen.web/ImageClassificationOffloadingService/src/main.c b/Tizen.web/ImageClassificationOffloadingService/src/main.c
@@ -8,53 +8,144 @@
 
 #include "main.h"
 #include <bundle.h>
+#include <dns-sd.h>
 #include <message_port.h>
 #include <service_app.h>
+#include <stdlib.h>
 #include <tizen.h>
 
 /**
  * @brief Service app create callback
  */
-static bool _create_cb(void* user_data){
+static bool _create_cb(void *user_data) {
   dlog_print(DLOG_INFO, LOG_TAG, "Callback create\n");
   return true;
 }
 
 /**
  * @brief Service app terminate callback
  */
-static void _terminate_cb(void* user_data){
+static void _terminate_cb(void *user_data) {
   dlog_print(DLOG_INFO, LOG_TAG, "Callback terminate\n");
 }
 
 /**
  * @brief Service app app control callback
  */
-static void _app_control_cb(app_control_h app_control, void* user_data){
+static void _app_control_cb(app_control_h app_control, void *user_data) {
   dlog_print(DLOG_INFO, LOG_TAG, "Callback app_control\n");
 }
 
+/**
+ * @brief print dnssd remote service information
+ */
+void _dnssd_print_found(dnssd_service_h dnssd_remote_service) {
+  /* Handling the found service */
+  char *service_name = NULL;
+  char *service_type = NULL;
+  char *ip_v4_address = NULL;
+  char *ip_v6_address = NULL;
+  int port = 0;
+  int error_code = dnssd_service_get_name(dnssd_remote_service, &service_name);
+  if (error_code == DNSSD_ERROR_NONE && service_name != NULL)
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Service name [%s]", service_name);
+
+  error_code = dnssd_service_get_type(dnssd_remote_service, &service_type);
+  if (error_code == DNSSD_ERROR_NONE && service_type != NULL)
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Service type [%s]", service_type);
+
+  error_code = dnssd_service_get_ip(dnssd_remote_service, &ip_v4_address,
+                                    &ip_v6_address);
+  if (error_code == DNSSD_ERROR_NONE) {
+    if (ip_v4_address)
+      dlog_print(DLOG_DEBUG, LOG_TAG, "IPV4 address [%s]", ip_v4_address);
+    if (ip_v6_address)
+      dlog_print(DLOG_DEBUG, LOG_TAG, "IPV6 address [%s]", ip_v6_address);
+  }
+
+  error_code = dnssd_service_get_port(dnssd_remote_service, &port);
+  if (error_code == DNSSD_ERROR_NONE)
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Service port [%d]", port);
+
+  if (service_name)
+    free(service_name);
+  if (service_type)
+    free(service_type);
+  if (ip_v4_address)
+    free(ip_v4_address);
+  if (ip_v6_address)
+    free(ip_v6_address);
+}
+
+/**
+ * @brief dnssd found callback
+ */
+void _found_cb(dnssd_service_state_e state,
+               dnssd_service_h dnssd_remote_service, void *user_data) {
+  dlog_print(DLOG_DEBUG, LOG_TAG, "Browse Service Callback\n");
+  dlog_print(DLOG_DEBUG, LOG_TAG, "Handler: %u\n", dnssd_remote_service);
+  dlog_print(DLOG_DEBUG, LOG_TAG, "State: ");
+  switch (state) {
+  case DNSSD_SERVICE_STATE_AVAILABLE:
+    /* DNS-SD service found */
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Available\n");
+    _dnssd_print_found(dnssd_remote_service);
+    break;
+  case DNSSD_SERVICE_STATE_UNAVAILABLE:
+    /* DNS-SD service becomes unavailable */
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Un-Available\n");
+    break;
+  case DNSSD_SERVICE_STATE_NAME_LOOKUP_FAILED:
+    /* Browsing failed */
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Browse Failure\n");
+    break;
+  case DNSSD_SERVICE_STATE_HOST_NAME_LOOKUP_FAILED:
+    /* Resolving service name failed */
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Resolve Service Name Failure\n");
+    break;
+  case DNSSD_SERVICE_STATE_ADDRESS_LOOKUP_FAILED:
+    /* Resolving service address failed */
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Resolve Service Address\n");
+    break;
+  default:
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Unknown Browse State\n");
+    break;
+  }
+}
+
 /**
  * @brief Main function.
  */
 int main(int argc, char *argv[]) {
-  service_app_lifecycle_callback_s event_callback = {
-    .create = _create_cb,
-    .terminate = _terminate_cb,
-    .app_control = _app_control_cb
-  };
+  dnssd_browser_h browser_handle;
+  char *target = "_nsd_offloading._tcp";
+  int ret;
+  bool found;
+
+  service_app_lifecycle_callback_s event_callback = {.create = _create_cb,
+                                                     .terminate = _terminate_cb,
+                                                     .app_control =
+                                                         _app_control_cb};
 
   dlog_print(DLOG_ERROR, LOG_TAG,
              "Image classification offloading service start");
 
-  bool found;
-  int ret = message_port_check_remote_port(REMOTE_APP_ID, PORT_NAME, &found);
+  ret = dnssd_initialize();
+  if (ret != DNSSD_ERROR_NONE)
+    dlog_print(DLOG_ERROR, LOG_TAG, "Dnssd initialize failed");
+
+  ret = dnssd_start_browsing_service(target, &browser_handle, _found_cb, NULL);
+  if (ret == DNSSD_ERROR_NONE)
+    dlog_print(DLOG_DEBUG, LOG_TAG, "Start browsing");
 
+  ret = message_port_check_remote_port(REMOTE_APP_ID, PORT_NAME, &found);
   if (ret != MESSAGE_PORT_ERROR_NONE || !found) {
     dlog_print(DLOG_ERROR, LOG_TAG, "Failed to check remote port");
   }
 
-  /* Todo: Send network information to ui application */
+  /** Todo: Change Uni-directional to Bi-directional
+    It takes time to find a remote service
+    Do not send network information when starting service */
   bundle *b = bundle_create();
   bundle_add_str(b, "command", "connected");
   ret = message_port_send_message(REMOTE_APP_ID, PORT_NAME, b);

diff --git a/Tizen.web/ImageClassificationOffloadingService/tizen-manifest.xml b/Tizen.web/ImageClassificationOffloadingService/tizen-manifest.xml
@@ -5,4 +5,7 @@
         <icon>imageclassificationoffloadingservice.png</icon>
         <label>imageclassificationoffloadingservice</label>
 	</service-application>
+    <privileges>
+        <privilege>http://tizen.org/privilege/internet</privilege>
+    </privileges>
 </manifest>