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