Continuing to clean S1AP

srsepc/hdr/mme/s1ap.h

@@ -112,7 +112,7 @@ private:
   uint32_t                                          m_next_mme_ue_s1ap_id;
 
   s1ap_mngmt_proc*               m_s1ap_mngmt_proc;
-  s1ap_nas_transport             m_s1ap_nas_transport;
+  s1ap_nas_transport*             m_s1ap_nas_transport;
 
   //FIXME the GTP-C should be moved to the MME class, the the packaging of GTP-C messages is done.
   mme_gtpc *m_mme_gtpc;

srsepc/hdr/mme/s1ap_nas_transport.h

@@ -36,8 +36,11 @@ namespace srsepc{
 class s1ap_nas_transport
 {
 public:
-  s1ap_nas_transport();
+
-  virtual ~s1ap_nas_transport();
+  static s1ap_nas_transport* m_instance;
+  static s1ap_nas_transport* get_instance(void);
+  static void cleanup(void);
+  void init(void);
 
   void set_log(srslte::log *s1ap_logger);
   bool unpack_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req, LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req);
@@ -54,8 +57,14 @@ public:
 
 
 private:
+  s1ap_nas_transport();
+  virtual ~s1ap_nas_transport();
+
   srslte::log *m_s1ap_log;
   srslte::byte_buffer_pool *m_pool;
+
+  s1ap* m_parent;
+
 };
 
 } //namespace srsepc

srsepc/src/mme/s1ap.cc

@@ -366,10 +366,10 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *ini
   m_s1ap_log->info("Received Initial UE Message. eNB-UE S1AP Id: %d\n", ue_ctx.enb_ue_s1ap_id);
 
   /*Log unhandled Initial UE message IEs*/
-  m_s1ap_nas_transport.log_unhandled_initial_ue_message_ies(init_ue);
+  m_s1ap_nas_transport->log_unhandled_initial_ue_message_ies(init_ue);
 
   /*Get NAS Attach Request and PDN connectivity request messages*/
-  if(!m_s1ap_nas_transport.unpack_initial_ue_message(init_ue, &attach_req,&pdn_con_req))
+  if(!m_s1ap_nas_transport->unpack_initial_ue_message(init_ue, &attach_req,&pdn_con_req))
   {
     //Could not decode the attach request and the PDN connectivity request.
     m_s1ap_log->error("Could not unpack NAS Attach Request and PDN connectivity request.\n");
@@ -435,7 +435,7 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *ini
 
   //Pack NAS Authentication Request in Downlink NAS Transport msg
   srslte::byte_buffer_t *reply_msg = m_pool->allocate();
-  m_s1ap_nas_transport.pack_authentication_request(reply_msg, ue_ctx.enb_ue_s1ap_id, ue_ctx.mme_ue_s1ap_id, autn, rand);
+  m_s1ap_nas_transport->pack_authentication_request(reply_msg, ue_ctx.enb_ue_s1ap_id, ue_ctx.mme_ue_s1ap_id, autn, rand);
   
   //Send Reply to eNB
   ssize_t n_sent = sctp_send(m_s1mme,reply_msg->msg, reply_msg->N_bytes, enb_sri, 0);
@@ -561,7 +561,7 @@ s1ap::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, srslte:
     m_s1ap_log->console("UE Authentication Rejected. IMSI: %lu\n", ue_ctx->imsi);
     m_s1ap_log->warning("UE Authentication Rejected. IMSI: %lu\n", ue_ctx->imsi);
     //Send back Athentication Reject
-    m_s1ap_nas_transport.pack_authentication_reject(reply_msg, ue_ctx->enb_ue_s1ap_id, ue_ctx->mme_ue_s1ap_id);
+    m_s1ap_nas_transport->pack_authentication_reject(reply_msg, ue_ctx->enb_ue_s1ap_id, ue_ctx->mme_ue_s1ap_id);
     return false;
   }
   else
@@ -569,7 +569,7 @@ s1ap::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, srslte:
     m_s1ap_log->console("UE Authentication Accepted. IMSI: %lu\n", ue_ctx->imsi);
     m_s1ap_log->info("UE Authentication Accepted. IMSI: %lu\n", ue_ctx->imsi);
     //Send Security Mode Command
-    m_s1ap_nas_transport.pack_security_mode_command(reply_msg, ue_ctx);
+    m_s1ap_nas_transport->pack_security_mode_command(reply_msg, ue_ctx);
 
   }
   return true;
@@ -831,7 +831,7 @@ s1ap::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte:
     return false;
   }
   srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
-  m_s1ap_nas_transport.pack_attach_accept(ue_ctx, erab_ctxt, &cs_resp->paa, nas_buffer); 
+  m_s1ap_nas_transport->pack_attach_accept(ue_ctx, erab_ctxt, &cs_resp->paa, nas_buffer); 
 
   
   LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer);

srsepc/src/mme/s1ap_nas_transport.cc

@@ -30,9 +30,11 @@
 
 namespace srsepc{
 
+s1ap_nas_transport*          s1ap_nas_transport::m_instance = NULL;
+boost::mutex                 s1ap_nas_transport_instance_mutex;
+
 s1ap_nas_transport::s1ap_nas_transport()
 {
-  m_pool = srslte::byte_buffer_pool::get_instance();
   return;
 }
 
@@ -41,6 +43,35 @@ s1ap_nas_transport::~s1ap_nas_transport()
   return;
 }
 
+s1ap_nas_transport*
+s1ap_nas_transport::get_instance(void)
+{
+  boost::mutex::scoped_lock lock(s1ap_nas_transport_instance_mutex);
+  if(NULL == m_instance) {
+    m_instance = new s1ap_nas_transport();
+  }
+  return(m_instance);
+}
+
+void
+s1ap_nas_transport::cleanup(void)
+{
+  boost::mutex::scoped_lock lock(s1ap_nas_transport_instance_mutex);
+  if(NULL != m_instance) {
+    delete m_instance;
+    m_instance = NULL;
+  }
+}
+
+void
+s1ap_nas_transport::init(void)
+{
+  m_parent = s1ap::get_instance();
+  m_s1ap_log = m_parent->m_s1ap_log;
+  m_pool = srslte::byte_buffer_pool::get_instance();
+}
+
+
 void
 s1ap_nas_transport::set_log(srslte::log *s1ap_log)
 {