sandboxed-api/oss-internship-2020/curl/sandbox.h

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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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#include <linux/futex.h>
#include <sys/mman.h> // For mmap arguments
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#include <syscall.h>
#include <cstdlib>
#include "curl_sapi.sapi.h"
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#include "sandboxed_api/sandbox2/util/bpf_helper.h"
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#include "sandboxed_api/util/flag.h"
class CurlSapiSandbox : public CurlSandbox {
protected:
std::unique_ptr<sandbox2::Policy> ModifyPolicy(
sandbox2::PolicyBuilder* policy_builder) override {
// Return a new policy
return (*policy_builder)
.AllowDynamicStartup()
.AllowExit()
.AllowFork()
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.AllowFutexOp(FUTEX_WAKE_PRIVATE)
.AllowMmap()
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.AllowOpen()
.AllowRead()
.AllowSafeFcntl()
.AllowWrite()
.AllowSyscalls({
__NR_accept,
__NR_access,
__NR_bind,
__NR_connect,
__NR_getpeername,
__NR_getsockname,
__NR_getsockopt,
__NR_ioctl,
__NR_listen,
__NR_madvise,
__NR_poll,
__NR_recvfrom,
__NR_recvmsg,
__NR_sendmmsg,
__NR_sendto,
__NR_setsockopt,
__NR_socket
})
.AllowUnrestrictedNetworking()
.AddDirectory("/lib")
.BuildOrDie();
}
};