Clarified border router routing table API description

Fixed description to use entry counts instead of data amount

Author: Mika Tervonen

nanostack/ws_bbr_api.h

@@ -130,9 +130,9 @@ int ws_bbr_info_get(int8_t interface_id, bbr_information_t *info_ptr);
  *
  * Table is Parent child relation using the Global address IID of the devices
  * To get the full IPv6 address of the device.
- *  IPv6 =  Global Prefix + IID.
+ *  IPv6 = Global Prefix + IID.
  *
- * Routing table is in the format: 18 bytes per entry
+ * Routing table is in the format: 16 bytes per entry
  * | Node IID 8 bytes   | parent IID 8 bytes |
  * | 1122112211221122   | 1111111111111111   |
  * | 1133113311331133   | 1111111111111111   |
@@ -142,15 +142,18 @@ int ws_bbr_info_get(int8_t interface_id, bbr_information_t *info_ptr);
  * | 1177117711771177   | 1155115511551155   |
  * | 1188118811881188   | 1177117711771177   |
  *
- * Order is not assured only parent child link is given in random order
+ * Order is not assured only parent child link is given in random order,
  *
- * Return value is device amount in network divided by 16 bytes per route entry
+ * When preparing to call this function ws_bbr_info_get function should be called to get the amount of devices in the network.
+ * Memory for table is allocated based on the size of network and needs to be sizeof(bbr_route_info_t) * amount of entries.
  *
- * \param interface_id interface ID of the Wi-SUN network
- * \param table_ptr Application allocated memory block where routing table is written.
+ * Return value is amount of route entries written to the table.
+ *
+ * \param interface_id interface ID of the Wi-SUN network.
+ * \param table_ptr Application allocated memory where routing table is written.
  * \param table_len Length of the table allocated by application given as amount of entries.
  *
- * \return 0 - x on success indicates amount of bytes written to the table_ptr
+ * \return 0 - x on success indicates amount of Route entries written to the table_ptr
  * \return <0 in case of errors
  *
  */