host/mesh: sequence number limit config

Set sequence number limit by Kconfig

This is port of f6d7f8f36fffdf2b311252eee54f765d854a51b7

nimble/host/mesh/include/mesh/glue.h

@@ -431,6 +431,7 @@ static inline unsigned int find_msb_set(uint32_t op)
 #define CONFIG_BT_MESH_APP_KEY_COUNT             MYNEWT_VAL(BLE_MESH_APP_KEY_COUNT)
 #define CONFIG_BT_MESH_SUBNET_COUNT              MYNEWT_VAL(BLE_MESH_SUBNET_COUNT)
 #define CONFIG_BT_MESH_STORE_TIMEOUT             MYNEWT_VAL(BLE_MESH_STORE_TIMEOUT)
+#define CONFIG_BT_MESH_IV_UPDATE_SEQ_LIMIT       MYNEWT_VAL(BLE_MESH_IV_UPDATE_SEQ_LIMIT)
 #define CONFIG_BT_MESH_IVU_DIVIDER               MYNEWT_VAL(BLE_MESH_IVU_DIVIDER)
 #define CONFIG_BT_DEVICE_NAME                    MYNEWT_VAL(BLE_MESH_DEVICE_NAME)
 #define CONFIG_BT_RX_SEG_MAX                     MYNEWT_VAL(BLE_MESH_RX_SEG_MAX)

nimble/host/mesh/src/net.c

@@ -39,7 +39,7 @@
 #define LOOPBACK_BUF_SUB(buf) (*(struct bt_mesh_subnet **)net_buf_user_data(buf))
 
 /* Seq limit after IV Update is triggered */
-#define IV_UPDATE_SEQ_LIMIT 8000000
+#define IV_UPDATE_SEQ_LIMIT CONFIG_BT_MESH_IV_UPDATE_SEQ_LIMIT
 
 #define IVI(pdu)           ((pdu)[0] >> 7)
 #define NID(pdu)           ((pdu)[0] & 0x7f)

nimble/host/mesh/syscfg.yml

@@ -214,6 +214,11 @@ syscfg.defs:
             absolutely necessary
         value: 768
 
+    BLE_MESH_IV_UPDATE_SEQ_LIMIT:
+        description: >
+            This option specifies the sequence number value to start iv update.
+        value: 0x800000
+
     BLE_MESH_IVU_DIVIDER:
         description: >
             When the IV Update state enters Normal operation or IV Update