Added structures to create session request. Starting to add create session response structure

lib/include/srslte/asn1/gtpc_ies.h

@@ -27,8 +27,6 @@
 
 
 #include "srslte/phy/io/netsource.h"
-//#include <linux/in.h>
-//#include <linux/in6.h>
 
 /****************************************************************
  *
@@ -135,7 +133,7 @@ enum gtpc_ie_type
   GTPC_IE_TYPE_TMGI = 158,
   GTPC_IE_TYPE_ADDITIONAL_MM_CONTEXT_FOR_SRVCC = 159,
   GTPC_IE_TYPE_ADDITIONAL_FLAGS_FOR_SRVCC = 160,
-//161 RESERVED 
+//161 RESERVED
   GTPC_IE_TYPE_MDT_CONFIGURATION = 162,
   GTPC_IE_TYPE_APCO = 163,
 //164 RESERVED
@@ -241,7 +239,7 @@ struct gtpc_ambr_ie
  *
  ***************************************************************************/
 /*
- * IP addresses should the sockaddr_storage struct, which can hold IPv4
+ * IP addresse IEs should the sockaddr_storage struct, which can hold IPv4
  * and IPv6 addresses.
  */
 
@@ -321,8 +319,22 @@ struct gtpc_f_teid_ie
   bool v6_present;
   enum gtpc_interface_type interface_type;
   uint32_t teid;
-  struct in_addr  ipv4;
+  in_addr_t  ipv4;
-  struct in6_addr ipv6;
+  struct in6_addr ipv6; //FIXME
 };
 
+//TODO
+//TODO IEs between 8.22 and 8.28 missing
+//TODO
+
+/****************************************************************************
+ *
+ * GTP-C Bearer Context IE
+ * Ref: 3GPP TS 29.274 v10.14.0 Table 8.28-1
+ *
+ ***************************************************************************/
+//The usage of this grouped IE is specific to the GTP-C message being sent.
+//As such, each GTP-C message will define it's bearer context structures
+//locally, according to the rules of  TS 29.274 v10.14.0 Section 7.
+
 #endif //GTPC_IES_H

lib/include/srslte/asn1/gtpc_msg.h

@@ -170,7 +170,7 @@ typedef struct gtpc_create_session_request
   bool pgw_addr_present;
   struct gtpc_f_teid_ie pgw_addr;					// C
 
-  char[MAX_APN_LENGTH] apn;							// M
+  char apn[MAX_APN_LENGTH];							// M
   //bool selection_mode_present;
   //enum selection_mode_ selection_mode;				// C/CO
   //bool pdn_type_present;
@@ -186,7 +186,23 @@ typedef struct gtpc_create_session_request
   //bool pco_present;
   //uint8_t pco;							// C
 
-  struct gtpc_bearer_context_ie bearer_context_created;		// M
+  struct gtpc_bearer_context_created_ie //see  TS 29.274 v10.14.0 Table 7.2.1-2
+  {
+    uint8_t ebi;
+    bool tft_present;
+    bool s1_u_enodeb_f_teid_present;
+    struct gtpc_f_teid_ie s1_u_enodeb_f_teid;
+    bool s4_u_sgsn_f_teid_present;
+    struct gtpc_f_teid_ie s4_u_sgsn_f_teid;
+    bool s5_s8_u_sgw_f_teid_present;
+    struct gtpc_f_teid_ie s5_s8_u_sgw_f_teid;
+    bool s5_s8_u_pgw_f_teid_present;
+    struct gtpc_f_teid_ie s5_s8_u_pgw_f_teid;
+    bool s12_rnc_f_teid_present;
+    struct gtpc_f_teid_ie s12_rnc_f_teid;
+    bool s2b_u_epdg_f_teid_present;
+    struct gtpc_f_teid_ie s2b_u_epdg_f_teid;
+  } bearer_context_created;		// M
   //bool bearer_context_deleted_present;
   //struct bearer_context_ bearer_context_deleted;		// C
   //bool trace_information_present;

srsepc/src/mme/mme_gtpc.cc

@@ -91,9 +91,9 @@ mme_gtpc::send_create_session_request(uint64_t imsi, struct create_session_respo
   cs_req->rat_type = GTPC_RAT_TYPE::EUTRAN;
 
   //Save RX Control TEID
-  create_rx_control_teid(cs_req->sender_f_tied);
+  //create_rx_control_teid(cs_req->sender_f_teid);
 
-  spgw->handle_create_session_request(&cs_req, cs_resp);
+  //spgw->handle_create_session_request(&cs_req, cs_resp);
   return;
 }
 } //namespace srsepc

srsepc/src/mme/s1ap.cc

@@ -487,7 +487,8 @@ s1ap::handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, srslte:
     //FIXME The packging of GTP-C messages is not ready
     //This means that GTP-U tunnels are created with function calls, as oposed to GTP-C.
     //In future send_create_session_request will return void and the handle_create_session_response will be called from the GTP-C class itself.
-    struct gtpc_create_session_response *cs_resp = m_gtpc->send_create_session_request(ue_ctx->imsi);
+    struct gtpc_create_session_response cs_resp;
+    m_gtpc->send_create_session_request(ue_ctx->imsi, &cs_resp);
     m_gtpc->handle_create_session_response(cs_resp);
   }
   return true;