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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SANDBOX_LINUX_BPF_DSL_VERIFIER_H__
#define SANDBOX_LINUX_BPF_DSL_VERIFIER_H__
#include <stdint.h>
#include <vector>
#include "base/macros.h"
#include "sandbox/sandbox_export.h"
struct sock_filter;
namespace sandbox {
struct arch_seccomp_data;
namespace bpf_dsl {
// TODO(mdempsky): This class doesn't perform any verification any more, so it
// deserves a new name.
class SANDBOX_EXPORT Verifier {
public:
// Evaluate a given BPF program for a particular set of system call
// parameters. If evaluation failed for any reason, "err" will be set to
// a non-NULL error string. Otherwise, the BPF program's result will be
// returned by the function and "err" is NULL.
// We do not actually implement the full BPF state machine, but only the
// parts that can actually be generated by our BPF compiler. If this code
// is used for purposes other than verifying the output of the sandbox's
// BPF compiler, we might have to extend this BPF interpreter.
static uint32_t EvaluateBPF(const std::vector<struct sock_filter>& program,
const struct arch_seccomp_data& data,
const char** err);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(Verifier);
};
} // namespace bpf_dsl
} // namespace sandbox
#endif // SANDBOX_LINUX_BPF_DSL_VERIFIER_H__
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