NimBLE: Added support for writing data more than BLE_ATT_ATTR_MAX_LEN

nimble/host/src/ble_att_clt.c

@@ -799,10 +799,17 @@ ble_att_clt_tx_prep_write(uint16_t conn_handle, uint16_t cid, uint16_t handle,
         goto err;
     }
 
+#if MYNEWT_VAL(BLE_GATT_BLOB_TRANSFER)
+    if (OS_MBUF_PKTLEN(txom) > BLE_ATT_ATTR_MAX_LEN) {
+        rc = BLE_HS_EINVAL;
+        goto err;
+    }
+#else
     if (offset + OS_MBUF_PKTLEN(txom) > BLE_ATT_ATTR_MAX_LEN) {
         rc = BLE_HS_EINVAL;
         goto err;
     }
+#endif
 
     if (OS_MBUF_PKTLEN(txom) >
         ble_att_mtu_by_cid(conn_handle, cid) - BLE_ATT_PREP_WRITE_CMD_BASE_SZ) {

nimble/host/src/ble_att_svr.c

@@ -2348,12 +2348,13 @@ ble_att_svr_prep_validate(struct ble_att_prep_entry_list *prep_list,
             }
         }
 
+#if !MYNEWT_VAL(BLE_GATT_BLOB_TRANSFER)
         cur_len = entry->bape_offset + OS_MBUF_PKTLEN(entry->bape_value);
         if (cur_len > BLE_ATT_ATTR_MAX_LEN) {
             *err_handle = entry->bape_handle;
             return BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN;
         }
-
+#endif
         prev = entry;
     }
 

nimble/syscfg.yml

@@ -141,6 +141,10 @@ syscfg.defs:
         description: >
             This enables LE Connection Subrating feature
         value: 0
+    BLE_GATT_BLOB_TRANSFER:
+        description: >
+            This enables write blob feature
+        value: 1
 
     BLE_PHY_2M:
         description: >

porting/examples/linux/include/syscfg/syscfg.h

@@ -955,6 +955,10 @@
 #define MYNEWT_VAL_BLE_GATT_WRITE_RELIABLE (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER
+#define MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_HOST
 #define MYNEWT_VAL_BLE_HOST (1)
 #endif

porting/examples/linux_blemesh/include/syscfg/syscfg.h

@@ -955,6 +955,10 @@
 #define MYNEWT_VAL_BLE_GATT_WRITE_RELIABLE (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER
+#define MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_HOST
 #define MYNEWT_VAL_BLE_HOST (1)
 #endif

porting/examples/nuttx/include/syscfg/syscfg.h

@@ -955,6 +955,10 @@
 #define MYNEWT_VAL_BLE_GATT_WRITE_RELIABLE (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER
+#define MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_HOST
 #define MYNEWT_VAL_BLE_HOST (1)
 #endif

porting/nimble/include/syscfg/syscfg.h

@@ -908,6 +908,10 @@
 #define MYNEWT_VAL_BLE_GATT_WRITE_RELIABLE (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER
+#define MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_HOST
 #define MYNEWT_VAL_BLE_HOST (1)
 #endif

porting/npl/riot/include/syscfg/syscfg.h

@@ -1751,6 +1751,10 @@
 #define MYNEWT_VAL_BLE_GAP_MAX_PENDING_CONN_PARAM_UPDATE (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER
+#define MYNEWT_VAL_BLE_GATT_BLOB_TRANSFER (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_GATT_DISC_ALL_CHRS
 #define MYNEWT_VAL_BLE_GATT_DISC_ALL_CHRS (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif