First version for N2 Handover

docker/Dockerfile.amf.ubuntu18

@@ -97,6 +97,7 @@ COPY --from=oai-amf-builder /usr/lib/x86_64-linux-gnu/libpsl.so.5 .
 WORKDIR /usr/local/lib
 COPY --from=oai-amf-builder /usr/lib/libboost_system.so.1.67.0 .
 COPY --from=oai-amf-builder /usr/lib/libboost_thread.so.1.67.0 .
+COPY --from=oai-amf-builder /usr/lib/libboost_chrono.so.1.67.0 .
 COPY --from=oai-amf-builder /usr/local/lib/libpistache.so  .
 
 RUN ldconfig

src/amf-app/amf_app.cpp

@@ -66,13 +66,11 @@ amf_app::amf_app(const amf_config& amf_cfg)
     : m_amf_ue_ngap_id2ue_ctx(),
       m_ue_ctx_key(),
       m_supi2ue_ctx(),
-      m_curl_handle_responses(),
-      m_curl_handle_responses_gtp() {
+      m_curl_handle_responses_n2_sm() {
   amf_ue_ngap_id2ue_ctx       = {};
   ue_ctx_key                  = {};
   supi2ue_ctx                 = {};
-  curl_handle_responses     = {};
-  curl_handle_responses_gtp = {};
+  curl_handle_responses_n2_sm = {};
   Logger::amf_app().startup("Creating AMF application functionality layer");
   if (itti_inst->create_task(TASK_AMF_APP, amf_app_task, nullptr)) {
     Logger::amf_app().error("Cannot create task TASK_AMF_APP");
@@ -493,48 +491,21 @@ void amf_app::trigger_nf_deregistration() {
 
 //---------------------------------------------------------------------------------------------
 void amf_app::add_promise(
-    uint32_t id, boost::shared_ptr<boost::promise<uint32_t>>& p) {
-  std::unique_lock lock(m_curl_handle_responses);
-  curl_handle_responses.emplace(id, p);
-}
-
-//---------------------------------------------------------------------------------------------
-void amf_app::remove_promise(uint32_t id) {
-  std::unique_lock lock(m_curl_handle_responses);
-  curl_handle_responses.erase(id);
-}
-
-//------------------------------------------------------------------------------
-void amf_app::trigger_process_response(uint32_t pid, uint32_t http_code) {
-  Logger::amf_app().debug(
-      "Trigger process response: Set promise with ID %u "
-      "to ready",
-      pid);
-  std::unique_lock lock(m_curl_handle_responses);
-  if (curl_handle_responses.count(pid) > 0) {
-    curl_handle_responses[pid]->set_value(http_code);
-    // Remove this promise from list
-    curl_handle_responses.erase(pid);
-  }
-}
-
-//---------------------------------------------------------------------------------------------
-void amf_app::add_promise(
-    uint32_t id, boost::shared_ptr<boost::promise<GtpTunnel_t>>& p) {
-  std::unique_lock lock(m_curl_handle_responses_gtp);
-  curl_handle_responses_gtp.emplace(id, p);
+    uint32_t id, boost::shared_ptr<boost::promise<std::string>>& p) {
+  std::unique_lock lock(m_curl_handle_responses_n2_sm);
+  curl_handle_responses_n2_sm.emplace(id, p);
 }
 
 //------------------------------------------------------------------------------
-void amf_app::trigger_process_response(uint32_t pid, GtpTunnel_t gtp_info) {
+void amf_app::trigger_process_response(uint32_t pid, std::string n2_sm) {
   Logger::amf_app().debug(
       "Trigger process response: Set promise with ID %u "
       "to ready",
       pid);
-  std::unique_lock lock(m_curl_handle_responses);
-  if (curl_handle_responses_gtp.count(pid) > 0) {
-    curl_handle_responses_gtp[pid]->set_value(gtp_info);
+  std::unique_lock lock(m_curl_handle_responses_n2_sm);
+  if (curl_handle_responses_n2_sm.count(pid) > 0) {
+    curl_handle_responses_n2_sm[pid]->set_value(n2_sm);
     // Remove this promise from list
-    curl_handle_responses_gtp.erase(pid);
+    curl_handle_responses_n2_sm.erase(pid);
   }
 }

src/amf-app/amf_app.hpp

@@ -162,8 +162,8 @@ class amf_app {
   void trigger_process_response(uint32_t pid, uint32_t http_code);
 
   void add_promise(
-      uint32_t pid, boost::shared_ptr<boost::promise<GtpTunnel_t>>& p);
-  void trigger_process_response(uint32_t pid, GtpTunnel_t gtp_info);
+      uint32_t pid, boost::shared_ptr<boost::promise<std::string>>& p);
+  void trigger_process_response(uint32_t pid, std::string n2_sm);
 
  private:
   // context management
@@ -175,13 +175,9 @@ class amf_app {
   std::map<std::string, std::shared_ptr<ue_context>> supi2ue_ctx;
   mutable std::shared_mutex m_supi2ue_ctx;
 
-  mutable std::shared_mutex m_curl_handle_responses;
-  std::map<uint32_t, boost::shared_ptr<boost::promise<uint32_t>>>
-      curl_handle_responses;
-
-  mutable std::shared_mutex m_curl_handle_responses_gtp;
-  std::map<uint32_t, boost::shared_ptr<boost::promise<GtpTunnel_t>>>
-      curl_handle_responses_gtp;
+  mutable std::shared_mutex m_curl_handle_responses_n2_sm;
+  std::map<uint32_t, boost::shared_ptr<boost::promise<std::string>>>
+      curl_handle_responses_n2_sm;
 };
 
 }  // namespace amf_application

src/amf-app/amf_n11.cpp

@@ -215,9 +215,17 @@ void amf_n11::handle_itti_message(
   pdu_session_update_request["n2SmInfoType"]          = itti_msg.n2sm_info_type;
   pdu_session_update_request["n2SmInfo"]["contentId"] = "n2msg";
   std::string json_part = pdu_session_update_request.dump();
-  std::string n2SmMsg;
+  std::string n2SmMsg   = {};
   octet_stream_2_hex_stream(
       (uint8_t*) bdata(itti_msg.n2sm), blength(itti_msg.n2sm), n2SmMsg);
+
+  // For N2 HO
+  if (itti_msg.n2sm_info_type.compare("HANDOVER_REQUIRED") == 0) {
+    pdu_session_update_request["hoState"] = "PREPARING";
+  } else if (itti_msg.n2sm_info_type.compare("HANDOVER_REQ_ACK") == 0) {
+    pdu_session_update_request["hoState"] = "PREPARED";
+  }
+
   curl_http_client(
       remote_uri, json_part, "", n2SmMsg, supi, itti_msg.pdu_session_id,
       itti_msg.promise_id);
@@ -579,12 +587,6 @@ void amf_n11::curl_http_client(
     Logger::amf_n11().debug("Get response with HTTP code (%d)", httpCode);
     Logger::amf_n11().debug("response body %s", response.c_str());
 
-    // Notify to the result if necessary
-    // TODO: Notify with the N3 information
-    if (promise_id > 0) {
-      amf_app_inst->trigger_process_response(promise_id, httpCode);
-    }
-
     if (static_cast<http_response_codes_e>(httpCode) ==
         http_response_codes_e::HTTP_RESPONSE_CODE_0) {
       // TODO: should be removed
@@ -593,6 +595,8 @@ void amf_n11::curl_http_client(
       // free curl before returning
       curl_slist_free_all(headers);
       curl_easy_cleanup(curl);
+      curl_global_cleanup();
+      free_wrapper((void**) &body_data);
       return;
     }
 
@@ -611,9 +615,12 @@ void amf_n11::curl_http_client(
         Logger::amf_n11().error("There's no content in the response");
         curl_slist_free_all(headers);
         curl_easy_cleanup(curl);
+        curl_global_cleanup();
+        free_wrapper((void**) &body_data);
         // TODO: send context response error
         return;
       }
+      // TODO: HO
 
       // Transfer N1 to gNB/UE if available
       if (number_parts > 1) {
@@ -668,10 +675,28 @@ void amf_n11::curl_http_client(
               "Could not get Json content from the response");
           curl_slist_free_all(headers);
           curl_easy_cleanup(curl);
+          curl_global_cleanup();
+          free_wrapper((void**) &body_data);
           // TODO:
           return;
         }
 
+        // For N2 HO
+        bool is_ho_procedure = false;
+        if (response_data.find("hoState") != response_data.end()) {
+          is_ho_procedure = true;
+        }
+        // Notify to the result
+        if ((promise_id > 0) and (is_ho_procedure)) {
+          amf_app_inst->trigger_process_response(
+              promise_id, n1sm);  // actually, N2 SM Info
+          curl_slist_free_all(headers);
+          curl_easy_cleanup(curl);
+          curl_global_cleanup();
+          free_wrapper((void**) &body_data);
+          return;
+        }
+
         itti_n1n2_message_transfer_request* itti_msg =
             new itti_n1n2_message_transfer_request(TASK_AMF_N11, TASK_AMF_APP);