RLC BO, BO response and DL Data handling. [Issue-ID: ODUHIGH-181]

[o-du/l2.git] / src / 5gnrmac / mac_utils.c

diff --git a/src/5gnrmac/mac_utils.c b/src/5gnrmac/mac_utils.c
index 8607227..00af807 100644 (file)
--- a/src/5gnrmac/mac_utils.c
+++ b/src/5gnrmac/mac_utils.c
@@ -24,3 +24,40 @@ uint32_t shortBsrBytesTable[MAX_SHORT_BSR_TABLE_ENTRIES] = { 0, 10, 14, 20, 28,
    38, 53, 74, 102, 142, 198, 276, 384, 535, 745, 1038, 1446, 2014, 2806, 3909, \
    5446, 7587, 10570, 14726, 20516, 28581, 39818, 55474, 77284, 107669, 150000, \
    150001 };
+
+/*******************************************************************
+ *
+ * @brief Allocates a crnti for new UE 
+ *
+ * @details
+ *
+ *    Function : getNewCrnti
+ *
+ *    Functionality: Allocates a crnti for new UE
+ *
+ * @params[in] CRNTI bit map
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ * ****************************************************************/
+uint16_t getNewCrnti(uint8_t *crntiMap)
+{
+   uint8_t bitIdx = 0;  /* bit position */
+   uint8_t mask = 1;    /* bit mask */
+   uint16_t newCrnti;   /* new crnti */
+
+   while(bitIdx < 8)
+   {
+      /* Find the first unset bit in crntiMap and allocate
+       * this as new crnti */
+      if((*crntiMap & (mask << bitIdx)) == 0)
+      {
+         newCrnti = ODU_START_CRNTI + bitIdx;
+        SET_ONE_BIT(bitIdx, *crntiMap);
+        return newCrnti;
+      }
+      else
+         bitIdx++;
+   }
+   return -1;
+}