1 // Copyright 2019 The ChromiumOS Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 use std::io;
6 use std::os::unix::io::AsRawFd;
7
8 use crate::filesystem::DirEntry;
9 use crate::filesystem::DirectoryIterator;
10 use crate::filesystem::FileSystem;
11 use crate::filesystem::ZeroCopyReader;
12 use crate::filesystem::ZeroCopyWriter;
13 use crate::server::Mapper;
14 use crate::server::Reader;
15 use crate::server::Server;
16 use crate::server::Writer;
17
18 // Use a file system that does nothing since we are fuzzing the server implementation.
19 struct NullFs;
20 impl FileSystem for NullFs {
21 type Inode = u64;
22 type Handle = u64;
23 type DirIter = NullIter;
24 }
25
26 struct NullIter;
27 impl DirectoryIterator for NullIter {
next(&mut self) -> Option<DirEntry>28 fn next(&mut self) -> Option<DirEntry> {
29 None
30 }
31 }
32
33 struct NullMapper;
34 impl Mapper for NullMapper {
map( &self, _mem_offset: u64, _size: usize, _fd: &dyn AsRawFd, _file_offset: u64, _prot: u32, ) -> io::Result<()>35 fn map(
36 &self,
37 _mem_offset: u64,
38 _size: usize,
39 _fd: &dyn AsRawFd,
40 _file_offset: u64,
41 _prot: u32,
42 ) -> io::Result<()> {
43 Err(io::Error::from_raw_os_error(libc::EOPNOTSUPP))
44 }
45
unmap(&self, _offset: u64, _size: u64) -> io::Result<()>46 fn unmap(&self, _offset: u64, _size: u64) -> io::Result<()> {
47 Err(io::Error::from_raw_os_error(libc::EOPNOTSUPP))
48 }
49 }
50
51 /// Fuzz the server implementation.
fuzz_server<R: Reader + ZeroCopyReader, W: Writer + ZeroCopyWriter>(r: R, w: W)52 pub fn fuzz_server<R: Reader + ZeroCopyReader, W: Writer + ZeroCopyWriter>(r: R, w: W) {
53 let server = Server::new(NullFs);
54 let mapper = NullMapper {};
55
56 let _ = server.handle_message(r, w, &mapper);
57 }
58