Quick hack to keep the IP in service request.

srsepc/src/mme/mme_gtpc.cc

@@ -157,6 +157,7 @@ mme_gtpc::handle_create_session_response(srslte::gtpc_pdu *cs_resp_pdu, bool pac
   }
   uint32_t mme_s1ap_id = id_it->second;
 
+  m_mme_gtpc_log->info("MME GTPC Ctrl TEID %d,  MME UE S1AP Id %d\n", cs_resp_pdu->header.teid, mme_s1ap_id);
   //Get S-GW Control F-TEID
   srslte::gtpc_f_teid_ie sgw_ctrl_fteid;
   sgw_ctrl_fteid.teid = cs_resp_pdu->header.teid;
@@ -168,9 +169,11 @@ mme_gtpc::handle_create_session_response(srslte::gtpc_pdu *cs_resp_pdu, bool pac
     return;
   }
   m_mme_gtpc_log->console("Create Session Response -- SPGW control TEID %d\n", sgw_ctrl_fteid.teid);
+  m_mme_gtpc_log->info("Create Session Response -- SPGW control TEID %d\n", sgw_ctrl_fteid.teid);
   in_addr s1u_addr;
   s1u_addr.s_addr = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4;
   m_mme_gtpc_log->console("Create Session Response -- SPGW S1-U Address: %s\n", inet_ntoa(s1u_addr));
+  m_mme_gtpc_log->info("Create Session Response -- SPGW S1-U Address: %s\n", inet_ntoa(s1u_addr));
 
   //Check UE Ipv4 address was allocated
   if(cs_resp->paa_present != true)

srsepc/src/mme/s1ap_ctx_mngmt_proc.cc

@@ -203,7 +203,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
 bool
 s1ap_ctx_mngmt_proc::handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPRESPONSE_STRUCT *in_ctxt_resp)
 {
-
+  static bool send_modify = false;
   uint32_t mme_ue_s1ap_id = in_ctxt_resp->MME_UE_S1AP_ID.MME_UE_S1AP_ID;
   ue_ecm_ctx_t *ue_ecm_ctx = m_s1ap->find_ue_ecm_ctx_from_mme_ue_s1ap_id(mme_ue_s1ap_id);
   if (ue_ecm_ctx == NULL)
@@ -244,6 +244,11 @@ s1ap_ctx_mngmt_proc::handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_I
     m_s1ap_log->console("E-RAB Context -- eNB TEID 0x%x; eNB GTP-U Address %s\n", erab_ctx->enb_fteid.teid, enb_addr_str);
 
   }
+  if(send_modify)
+  {
+    m_mme_gtpc->send_modify_bearer_request(&ue_ecm_ctx->erabs_ctx[5]);
+  }
+  send_modify = true;
   return true;
 }
 

srsepc/src/mme/s1ap_nas_transport.cc

@@ -687,6 +687,7 @@ s1ap_nas_transport::handle_nas_service_request(uint32_t m_tmsi,
       m_s1ap_log->info("Generating KeNB with UL NAS COUNT: %d\n",ue_emm_ctx->security_ctxt.ul_nas_count);
 
       m_mme_gtpc->send_create_session_request(ue_ecm_ctx.imsi, ue_ecm_ctx.mme_ue_s1ap_id,false);
+      m_s1ap_log->console("UE ESM Ctr TEID %d\n", ue_ecm_ctx.erabs_ctx[5].sgw_ctrl_fteid.teid);
      // m_s1ap->m_s1ap_ctx_mngmt_proc->send_initial_context_setup_request(ue_);
     }
   }

srsepc/src/spgw/spgw.cc

@@ -338,7 +338,7 @@ spgw::handle_sgi_pdu(srslte::byte_buffer_t *msg)
   dest_addr.s_addr = dest_ip;
 
   //m_spgw_log->console("IP version: %d\n", version);
-  //m_spgw_log->console("Received packet to IP: %s\n", inet_ntoa(dest_addr));
+  m_spgw_log->console("Received packet to IP: %s\n", inet_ntoa(dest_addr));
 
   pthread_mutex_lock(&m_mutex);
   gtp_fteid_it = m_ip_to_teid.find(dest_ip);
@@ -351,7 +351,7 @@ spgw::handle_sgi_pdu(srslte::byte_buffer_t *msg)
 
   if(ip_found == false)
   {
-    //m_spgw_log->console("IP Packet is not for any UE\n");
+    m_spgw_log->console("IP Packet is not for any UE\n");
     return;
   }
   struct sockaddr_in enb_addr;
@@ -449,8 +449,8 @@ spgw::handle_create_session_request(struct srslte::gtpc_create_session_request *
   //Setup uplink user TEID
   uint64_t spgw_uplink_user_teid = get_new_user_teid();
   //Allocate UE IP
-  in_addr_t ue_ip = get_new_ue_ipv4();
+  //in_addr_t ue_ip = get_new_ue_ipv4();
-
+  in_addr_t ue_ip = inet_addr("172.16.0.2");
   uint8_t default_bearer_id = 5;
 
   //Save the UE IP to User TEID map