nimble/eatt: Handle MTU request over enhanced bearer

Handle ATT MTU request over enhanced bearer. This request shall return Request Not Supported error (0x06)
apache · Jan 23, 2025 · 4e90bdc · 4e90bdc
1 parent cf947cd
commit 4e90bdc
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/nimble/host/src/ble_att.c b/nimble/host/src/ble_att.c
@@ -639,6 +639,10 @@ bool
 ble_eatt_supported_req(uint8_t opcode)
 {
     switch (opcode) {
+    /* EATT does not support MTU request,
+     * but we must handle this request with proper error response.
+     */
+    case BLE_ATT_OP_MTU_REQ:
     case BLE_ATT_OP_WRITE_CMD:
     case BLE_ATT_OP_FIND_INFO_REQ:
     case BLE_ATT_OP_FIND_TYPE_VALUE_REQ:

diff --git a/nimble/host/src/ble_att_svr.c b/nimble/host/src/ble_att_svr.c
@@ -747,7 +747,7 @@ ble_att_svr_rx_mtu(uint16_t conn_handle, uint16_t cid, struct os_mbuf **rxom)
     mtu = 0;
 
     if (cid != BLE_L2CAP_CID_ATT) {
-        /*TODO */
+        /* This operation is not supported over enhanced ATT bearer */
         return BLE_HS_ENOTSUP;
     }