removed pdu processing from the ue rrc cmd queue. Instead, now the rrc processes the incoming pdus right away. This is essential to fix the security cmd issue in the ue

srsue/hdr/stack/rrc/rrc.h

@@ -350,7 +350,7 @@ protected:
 
 private:
   typedef struct {
-    enum { PDU, PCCH, PDU_MCH, RLF, PDU_BCCH_DLSCH, HO_COMPLETE, STOP } command;
+    enum { PCCH, RLF, HO_COMPLETE, STOP } command;
     srslte::unique_byte_buffer_t pdu;
     uint16_t                     lcid;
   } cmd_msg_t;

srsue/src/stack/rrc/rrc.cc

@@ -266,21 +266,12 @@ void rrc::run_tti()
     cmd_msg_t msg;
     if (cmd_q.try_pop(&msg)) {
       switch (msg.command) {
-        case cmd_msg_t::PDU:
-          process_pdu(msg.lcid, std::move(msg.pdu));
-          break;
         case cmd_msg_t::PCCH:
           process_pcch(std::move(msg.pdu));
           break;
-        case cmd_msg_t::PDU_MCH:
-          parse_pdu_mch(msg.lcid, std::move(msg.pdu));
-          break;
         case cmd_msg_t::RLF:
           radio_link_failure();
           break;
-        case cmd_msg_t::PDU_BCCH_DLSCH:
-          parse_pdu_bcch_dlsch(std::move(msg.pdu));
-          break;
         case cmd_msg_t::HO_COMPLETE:
           process_ho_ra_completed(msg.lcid > 0);
           break;
@@ -1478,10 +1469,7 @@ void rrc::write_pdu_bcch_bch(unique_byte_buffer_t pdu)
 
 void rrc::write_pdu_bcch_dlsch(unique_byte_buffer_t pdu)
 {
-  cmd_msg_t msg;
-  msg.command = cmd_msg_t::PDU_BCCH_DLSCH;
-  msg.pdu     = std::move(pdu);
-  cmd_q.push(std::move(msg));
+  parse_pdu_bcch_dlsch(std::move(pdu));
 }
 
 void rrc::parse_pdu_bcch_dlsch(unique_byte_buffer_t pdu)
@@ -1730,11 +1718,7 @@ void rrc::write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu)
   if (0 != lcid or serving_cell->has_mcch) {
     return;
   }
-  cmd_msg_t msg;
-  msg.command = cmd_msg_t::PDU_MCH;
-  msg.pdu     = std::move(pdu);
-  msg.lcid    = lcid;
-  cmd_q.push(std::move(msg));
+  parse_pdu_mch(lcid, std::move(pdu));
 }
 
 void rrc::parse_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu)
@@ -1825,12 +1809,7 @@ void rrc::write_sdu(srslte::unique_byte_buffer_t sdu)
 
 void rrc::write_pdu(uint32_t lcid, unique_byte_buffer_t pdu)
 {
-  // add PDU to command queue
-  cmd_msg_t msg;
-  msg.pdu     = std::move(pdu);
-  msg.command = cmd_msg_t::PDU;
-  msg.lcid    = (uint16_t)lcid;
-  cmd_q.push(std::move(msg));
+  process_pdu(lcid, std::move(pdu));
 }
 
 void rrc::process_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu)