F1 & MAC:

1. Fix UE_CONTEXT_SETUP_REQUEST and CONTEXT_MODIFICATION_REQUEST encode/decode
2. Add gNB_DU_CONFIGURATION_UPDATE and gNB_CU_CONFIGURATION_UPDATE procedure
3. Add C_RNTI_TO_BIT_STRING function
4. Add INITIAL_UL_RRC_MESSAGE_TRANSFER procedure and with mac_du_data_ind (MSG3)
5. Add GNB-CUSystemInformation extension part for the F1SetupResponse procedure

cmake_targets/CMakeLists.txt

@@ -525,12 +525,16 @@ add_library(F1AP_LIB
 
 include_directories ("${F1AP_C_DIR}")
 include_directories ("${F1AP_DIR}")
+message(${F1AP_C_DIR})
+message(${F1AP_DIR})
 
 
 add_library(F1AP
   #${F1AP_DIR}/test.c
   ${F1AP_DIR}/DU_F1AP.c
   ${F1AP_DIR}/CU_F1AP.c
+  ${F1AP_DIR}/sctp_du.c
+  ${F1AP_DIR}/sctp_cu.c
   )
 
 add_executable(test_f1ap_du

openair2/LAYER2/MAC/eNB_scheduler_ulsch.c

@@ -366,14 +366,19 @@ rx_sdu(const module_id_t enb_mod_idP,
           for (ii = 0; ii < NB_RA_PROC_MAX; ii++) {
             ra = &mac->common_channels[CC_idP].ra[ii];
             if ((ra->rnti == current_rnti) && (ra->state != IDLE)) {
-              mac_rrc_data_ind(enb_mod_idP,
+              //int RC.cudu.du_flag = 1;
+              int du_flag = 1;
+              mac_rrc_data_ind(
+                   enb_mod_idP,
                    CC_idP,
-                               frameP, subframeP,
+                   frameP, subframeP, old_UE_id,
                    old_rnti,
                    DCCH,
                    (uint8_t *) payload_ptr,
                    rx_lengths[i],
-                               0);
+                   0,
+                   du_flag
+              );
               // prepare transmission of Msg4(RRCConnectionReconfiguration)
               ra->state = MSGCRNTI;
               LOG_I(MAC,
@@ -613,14 +618,19 @@ rx_sdu(const module_id_t enb_mod_idP,
 	    // kill RA procedure
 	  }
     
-	  mac_rrc_data_ind(enb_mod_idP,
+    //int RC.cudu.du_flag = 1;
+    int du_flag = 1;
+	  mac_rrc_data_ind(
+         enb_mod_idP,
 			   CC_idP,
-			   frameP, subframeP,
+			   frameP, subframeP, UE_id,
 			   current_rnti,
 			   CCCH,
 			   (uint8_t *) payload_ptr,
 			   rx_lengths[i],
-			   0);
+			   0,
+         du_flag
+    );
 
 
 	  if (num_ce > 0) {	// handle msg3 which is not RRCConnectionRequest

openair2/RRC/L2_INTERFACE/openair_rrc_L2_interface.h

@@ -47,14 +47,16 @@ mac_rrc_data_req(
 int8_t
 mac_rrc_data_ind(
   const module_id_t     module_idP,
-  const int             CC_idP,
+  const int             CC_id,
   const frame_t         frameP,
   const sub_frame_t     sub_frameP,
+  const int             UE_id,
   const rnti_t          rntiP,
   const rb_id_t         srb_idP,
-  const uint8_t        *sduP,
+  const uint8_t*        sduP,
   const sdu_size_t      sdu_lenP,
-  const uint8_t         mbsfn_sync_area
+  const uint8_t         mbsfn_sync_areaP,
+  const int             du_flag
 );
 
 int8_t

openair2/RRC/LTE/L2_interface.c

@@ -232,6 +232,33 @@ mac_rrc_data_req(
   return(0);
 }
 
+//--------------------------------------------------------------------------
+int8_t
+mac_du_data_ind(
+  const module_id_t     module_idP,
+  const int             CC_idP,
+  const int             UE_id,
+  const rnti_t          rntiP,
+  const uint8_t        *sduP,
+  const sdu_size_t      sdu_lenP
+)
+//--------------------------------------------------------------------------
+{
+  printf(
+      "[F1 %d][RAPROC] CC_id %d current_rnti %x Received Msg3 from already registered UE %d: length %d, offset %ld\n",
+      module_idP, CC_idP, rntiP,
+      UE_id, sdu_lenP, sduP);
+
+  DU_send_INITIAL_UL_RRC_MESSAGE_TRANSFER(
+      module_idP,
+      CC_idP,
+      UE_id,
+      rntiP,  
+      sduP,
+      sdu_lenP
+  );
+}
+
 //------------------------------------------------------------------------------
 int8_t
 mac_rrc_data_ind(
@@ -239,14 +266,28 @@ mac_rrc_data_ind(
   const int             CC_id,
   const frame_t         frameP,
   const sub_frame_t     sub_frameP,
+  const int             UE_id,
   const rnti_t          rntiP,
   const rb_id_t         srb_idP,
   const uint8_t*        sduP,
   const sdu_size_t      sdu_lenP,
-  const uint8_t         mbsfn_sync_areaP
+  const uint8_t         mbsfn_sync_areaP,
+  const int             du_flag
 )
 //--------------------------------------------------------------------------
 {
+
+  // navid update / Bing-Kai modify
+  if (du_flag) {
+    mac_du_data_ind(
+       module_idP,
+       CC_id,
+       UE_id,
+       rntiP,
+       sduP,
+       sdu_lenP);
+  }
+
   SRB_INFO *Srb_info;
   protocol_ctxt_t ctxt;
   sdu_size_t      sdu_size = 0;

openair2/RRC/LTE/rrc_eNB.c

@@ -6446,6 +6446,7 @@ rrc_eNB_decode_ccch(
             rrc_eNB_generate_RRCConnectionReject(ctxt_pP,
                              rrc_eNB_get_ue_context(RC.rrc[ctxt_pP->module_id], ctxt_pP->rnti),
                              CC_id);
+            // navid:
             break;
           }
 

openair2/RRC/LTE/rrc_proto.h

@@ -423,11 +423,13 @@ mac_rrc_data_ind(
   const int             CC_id,
   const frame_t         frameP,
   const sub_frame_t     sub_frameP,
+  const int             UE_id,
   const rnti_t          rntiP,
   const rb_id_t         srb_idP,
   const uint8_t*        sduP,
   const sdu_size_t      sdu_lenP,
-  const uint8_t         mbsfn_sync_areaP
+  const uint8_t         mbsfn_sync_areaP,
+  const int             du_flag
 );
 
 int8_t

openair3/UTILS/conversions.h

@@ -252,8 +252,21 @@ do {                                                                    \
 } while(0)
 
 
+/* TS 38.473 v15.2.1 section 9.3.1.32:
+ * C RNTI
+ */
+#define C_RNTI_TO_BIT_STRING(mACRO, bITsTRING)          \
+do {                                                    \
+    (bITsTRING)->buf = calloc(2, sizeof(uint8_t));      \
+    (bITsTRING)->buf[0] = (mACRO) >> 4;                 \
+    (bITsTRING)->buf[1] = ((mACRO) & 0x0f) << 4;        \
+    (bITsTRING)->size = 2;                              \
+    (bITsTRING)->bits_unused = 0;                       \
+} while(0)
+
+
 /* TS 38.473 v15.1.1 section 9.3.2.1:
- * NR CELL ID
+ * TRANSPORT LAYER ADDRESS
  */
 #define TRANSPORT_LAYER_ADDRESS_TO_BIT_STRING(mACRO, bITsTRING)    \
 do {                                                    \