1 /*
2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "host/commands/process_sandboxer/policies.h"
18
19 #include <sys/socket.h>
20 #include <syscall.h>
21
22 #include <sandboxed_api/sandbox2/allow_unrestricted_networking.h>
23 #include <sandboxed_api/sandbox2/policybuilder.h>
24 #include <sandboxed_api/sandbox2/util/bpf_helper.h>
25
26 namespace cuttlefish::process_sandboxer {
27
SocketVsockProxyPolicy(const HostInfo & host)28 sandbox2::PolicyBuilder SocketVsockProxyPolicy(const HostInfo& host) {
29 return BaselinePolicy(host, host.HostToolExe("socket_vsock_proxy"))
30 .AddDirectory(host.log_dir, /* is_ro= */ false)
31 .AddDirectory(host.vsock_device_dir, /* is_ro= */ false)
32 .AddFile(host.cuttlefish_config_path)
33 .AddPolicyOnSyscall(
34 __NR_socket, {ARG_32(0), JEQ32(AF_UNIX, ALLOW), JEQ32(AF_INET, ALLOW),
35 JEQ32(AF_INET6, ALLOW), JEQ32(AF_VSOCK, ALLOW)})
36 .Allow(sandbox2::UnrestrictedNetworking())
37 .AllowEventFd()
38 .AllowFork() // `clone` for multithreading
39 .AllowGetIDs()
40 .AllowHandleSignals()
41 .AllowSafeFcntl()
42 .AllowSyscall(__NR_bind)
43 .AllowSyscall(__NR_connect)
44 .AllowSyscall(__NR_listen)
45 .AllowSyscall(__NR_madvise)
46 .AllowSyscall(__NR_sendto)
47 .AllowSyscall(__NR_setsockopt)
48 .AllowSyscall(__NR_shutdown)
49 .AllowSyscalls({__NR_accept, __NR_accept4})
50 .AllowTCGETS();
51 }
52
53 } // namespace cuttlefish::process_sandboxer
54