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extmod/modbluetooth_nimble: Use data_alloc length to truncate writes.

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This allows the maximum size of a characteristic/descriptor to be
increased by locally writing to it first.
This commit is contained in:
Jim Mussared 2019-10-22 01:03:17 +11:00
parent f34e16dbc6
commit 2c1f269918
1 changed files with 1 additions and 1 deletions
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2
extmod/modbluetooth_nimble.c
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@ -430,7 +430,7 @@ static int characteristic_access_cb(uint16_t conn_handle, uint16_t value_handle,
return BLE_ATT_ERR_ATTR_NOT_FOUND;
}
entry = MP_OBJ_TO_PTR(elem->value);
entry->data_len = MIN(MP_BLUETOOTH_MAX_ATTR_SIZE, OS_MBUF_PKTLEN(ctxt->om));
entry->data_len = MIN(entry->data_alloc, OS_MBUF_PKTLEN(ctxt->om));
os_mbuf_copydata(ctxt->om, 0, entry->data_len, entry->data);
mp_bluetooth_gatts_on_write(conn_handle, value_handle);