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Side by Side Diff: sandbox/linux/seccomp-bpf/verifier.h

Issue 66723007: Make sandbox/linux/seccomp-bpf/ follow the style guide. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: (empty) rebase Created 7 years, 1 month ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__ 5 #ifndef SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__
6 #define SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__ 6 #define SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__
7 7
8 #include <linux/filter.h> 8 #include <linux/filter.h>
9 9
10 #include <utility> 10 #include <utility>
11 #include <vector> 11 #include <vector>
12 12
13
14 namespace playground2 { 13 namespace playground2 {
15 14
16 class SandboxBpfPolicy; 15 class SandboxBpfPolicy;
17 16
18 class Verifier { 17 class Verifier {
19 public: 18 public:
20 // Evaluate the BPF program for all possible inputs and verify that it 19 // Evaluate the BPF program for all possible inputs and verify that it
21 // computes the correct result. We use the "evaluators" to determine 20 // computes the correct result. We use the "evaluators" to determine
22 // the full set of possible inputs that we have to iterate over. 21 // the full set of possible inputs that we have to iterate over.
23 // Returns success, if the BPF filter accurately reflects the rules 22 // Returns success, if the BPF filter accurately reflects the rules
24 // set by the "evaluators". 23 // set by the "evaluators".
25 // Upon success, "err" is set to NULL. Upon failure, it contains a static 24 // Upon success, "err" is set to NULL. Upon failure, it contains a static
26 // error message that does not need to be free()'d. 25 // error message that does not need to be free()'d.
27 static bool VerifyBPF(Sandbox *sandbox, 26 static bool VerifyBPF(Sandbox* sandbox,
28 const std::vector<struct sock_filter>& program, 27 const std::vector<struct sock_filter>& program,
29 const SandboxBpfPolicy& policy, 28 const SandboxBpfPolicy& policy,
30 const char **err); 29 const char** err);
31 30
32 // Evaluate a given BPF program for a particular set of system call 31 // Evaluate a given BPF program for a particular set of system call
33 // parameters. If evaluation failed for any reason, "err" will be set to 32 // parameters. If evaluation failed for any reason, "err" will be set to
34 // a non-NULL error string. Otherwise, the BPF program's result will be 33 // a non-NULL error string. Otherwise, the BPF program's result will be
35 // returned by the function and "err" is NULL. 34 // returned by the function and "err" is NULL.
36 // We do not actually implement the full BPF state machine, but only the 35 // We do not actually implement the full BPF state machine, but only the
37 // parts that can actually be generated by our BPF compiler. If this code 36 // parts that can actually be generated by our BPF compiler. If this code
38 // is used for purposes other than verifying the output of the sandbox's 37 // is used for purposes other than verifying the output of the sandbox's
39 // BPF compiler, we might have to extend this BPF interpreter. 38 // BPF compiler, we might have to extend this BPF interpreter.
40 static uint32_t EvaluateBPF(const std::vector<struct sock_filter>& program, 39 static uint32_t EvaluateBPF(const std::vector<struct sock_filter>& program,
41 const struct arch_seccomp_data& data, 40 const struct arch_seccomp_data& data,
42 const char **err); 41 const char** err);
43 42
44 private: 43 private:
45 DISALLOW_IMPLICIT_CONSTRUCTORS(Verifier); 44 DISALLOW_IMPLICIT_CONSTRUCTORS(Verifier);
46 }; 45 };
47 46
48 } // namespace 47 } // namespace
49 48
50 #endif // SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__ 49 #endif // SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__
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