test/fuzz: start with att_db

test/fuzz/fuzz_att_db.c

@@ -0,0 +1,26 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include <ble/att_db.h>
+#include <ble/att_db_util.h>
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    static int initialized = 0;
+    if (initialized == 0){
+        initialized = 1;
+        // setup empty db
+        att_db_util_init();
+        uint8_t * att_db = att_db_util_get_address();
+        // setup att_db
+        att_set_db(att_db);
+    }
+
+    // TODO: setup att_connection
+    att_connection_t att_connection = { 0 };
+    uint8_t att_response[1000];
+    uint16_t att_request_len = size;
+    const uint8_t * att_request = data;
+    uint16_t att_respnose_len = att_handle_request(&att_connection, (uint8_t *) att_request, att_request_len, att_response);
+    return 0;
+}