1 // Copyright 2016 The Fuchsia Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "struct.h"
6 
7 #include <stdint.h>
8 
9 _Static_assert(sizeof(mojo_struct_header_t) == 8u, "mojo_struct_header_t should be 8 bytes");
10 
mojo_validate_struct_header(const void * data,size_t size)11 bool mojo_validate_struct_header(const void* data, size_t size) {
12     if (size < sizeof(mojo_struct_header_t) || size > UINT32_MAX) {
13         return false;
14     }
15 
16     const mojo_struct_header_t* header = (const mojo_struct_header_t*)data;
17 
18     if (header->num_bytes < sizeof(mojo_struct_header_t) || header->num_bytes > size) {
19         return false;
20     }
21 
22     return true;
23 }
24