Integrity fail after service request (#268)

* Adding some debug prints to confirm the issue.
* Cleanup whitespaces.
* More debug prints
* Adding boolean to whether it is actually necessary to send NAS message in RRC reconfiguration.
* Deleting debug prints.

srsenb/hdr/upper/rrc.h

@@ -296,6 +296,7 @@ public:
     int cqi_sched_sf_idx;
     int cqi_sched_prb_idx;
     int get_drbid_config(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb, int drbid);
+    bool nas_pending;
     srslte::byte_buffer_t erab_info;
   };
 
@@ -363,6 +364,7 @@ private:
     uint32_t nof_users[100][80]; 
   } sr_sched_t;
 
+
   sr_sched_t sr_sched; 
   sr_sched_t cqi_sched; 
   LIBLTE_RRC_MCCH_MSG_STRUCT mcch;

srsenb/src/upper/rrc.cc

@@ -901,6 +901,7 @@ rrc::ue::ue()
   cqi_sched_sf_idx  = 0;
   cqi_sched_prb_idx = 0;
   rlf_cnt           = 0;
+  nas_pending       = false;
   state             = RRC_STATE_IDLE;
   pool              = srslte::byte_buffer_pool::get_instance();
 }
@@ -1227,9 +1228,12 @@ void rrc::ue::setup_erab(uint8_t id, LIBLTE_S1AP_E_RABLEVELQOSPARAMETERS_STRUCT
   parent->gtpu->add_bearer(rnti, lcid, addr_, erabs[id].teid_out, &(erabs[id].teid_in));
 
   if(nas_pdu) {
+    nas_pending = true;
     memcpy(erab_info.buffer, nas_pdu->buffer, nas_pdu->n_octets);
     erab_info.N_bytes = nas_pdu->n_octets;
     parent->rrc_log->info_hex(erab_info.buffer, erab_info.N_bytes, "setup_erab nas_pdu -> erab_info rnti 0x%x", rnti);
+  } else {
+    nas_pending = false;
   }
 }
 
@@ -1667,12 +1671,17 @@ void rrc::ue::send_connection_reconf(srslte::byte_buffer_t *pdu)
   // DRB1 has already been configured in GTPU through bearer setup
 
   // Add NAS Attach accept
+  if(nas_pending){
+    parent->rrc_log->debug("Adding NAS message to connection reconfiguration\n");
     conn_reconf->N_ded_info_nas = 1;
 
     parent->rrc_log->info_hex(erab_info.buffer, erab_info.N_bytes, "connection_reconf erab_info -> nas_info rnti 0x%x\n", rnti);
     conn_reconf->ded_info_nas_list[0].N_bytes = erab_info.N_bytes;
     memcpy(conn_reconf->ded_info_nas_list[0].msg, erab_info.buffer, erab_info.N_bytes);
- 
+  } else {
+    parent->rrc_log->debug("Not adding NAS message to connection reconfiguration\n");
+    conn_reconf->N_ded_info_nas = 0;
+  }
   // Reuse same PDU
   pdu->reset();