/src/usbguard/src/Library/RuleEvaluatedCondition.cpp
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1 | | // |
2 | | // Copyright (C) 2016 Red Hat, Inc. |
3 | | // |
4 | | // This program is free software; you can redistribute it and/or modify |
5 | | // it under the terms of the GNU General Public License as published by |
6 | | // the Free Software Foundation; either version 2 of the License, or |
7 | | // (at your option) any later version. |
8 | | // |
9 | | // This program is distributed in the hope that it will be useful, |
10 | | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | | // GNU General Public License for more details. |
13 | | // |
14 | | // You should have received a copy of the GNU General Public License |
15 | | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
16 | | // |
17 | | // Authors: Daniel Kopecek <dkopecek@redhat.com> |
18 | | // |
19 | | #ifdef HAVE_BUILD_CONFIG_H |
20 | | #include <build-config.h> |
21 | | #endif |
22 | | |
23 | | #include "RuleEvaluatedCondition.hpp" |
24 | | #include "RulePrivate.hpp" |
25 | | |
26 | | #include "usbguard/RuleParser.hpp" |
27 | | |
28 | | #include <string> |
29 | | |
30 | | #ifndef _XOPEN_SOURCE |
31 | | #define _XOPEN_SOURCE |
32 | | #include <ctime> |
33 | | #endif |
34 | | |
35 | | namespace usbguard |
36 | | { |
37 | | RuleEvaluatedCondition::RuleEvaluatedCondition(const std::string& elapsed_time, bool negated) |
38 | 2.03k | : RuleConditionBase("rule-applied", elapsed_time, negated) |
39 | 2.03k | { |
40 | 2.03k | _elapsed_time = std::chrono::steady_clock::duration(stringToSeconds(elapsed_time)); |
41 | 2.03k | } |
42 | | |
43 | | RuleEvaluatedCondition::RuleEvaluatedCondition(const RuleEvaluatedCondition& rhs) |
44 | 3.17k | : RuleConditionBase(rhs), |
45 | 3.17k | _elapsed_time(rhs._elapsed_time) |
46 | 3.17k | { |
47 | 3.17k | } |
48 | | |
49 | | bool RuleEvaluatedCondition::update(const Rule& rule) |
50 | 0 | { |
51 | 0 | if (rule.internal()->metadata().counter_evaluated > 0) { |
52 | 0 | if (_elapsed_time == std::chrono::steady_clock::duration::zero()) { |
53 | 0 | return true; |
54 | 0 | } |
55 | 0 | else { |
56 | 0 | const auto last_evaluated_duration = std::chrono::steady_clock::now() \ |
57 | 0 | - rule.internal()->metadata().tp_last_evaluated; |
58 | |
|
59 | 0 | if (last_evaluated_duration <= _elapsed_time) { |
60 | 0 | return true; |
61 | 0 | } |
62 | 0 | } |
63 | 0 | } |
64 | | |
65 | 0 | return false; |
66 | 0 | } |
67 | | |
68 | | RuleConditionBase* RuleEvaluatedCondition::clone() const |
69 | 3.17k | { |
70 | 3.17k | return new RuleEvaluatedCondition(*this); |
71 | 3.17k | } |
72 | | |
73 | | uint64_t RuleEvaluatedCondition::stringToSeconds(const std::string& string) |
74 | 2.03k | { |
75 | 2.03k | struct ::tm tm = { }; |
76 | | |
77 | 2.03k | if (string.empty() || string == "") { |
78 | 507 | return 0; |
79 | 507 | } |
80 | | |
81 | 1.53k | if (::strptime(string.c_str(), "%H:%M:%s", &tm) == nullptr) { |
82 | 1.33k | if (::strptime(string.c_str(), "%H:%M", &tm) == nullptr) { |
83 | 1.13k | if (::strptime(string.c_str(), "%s", &tm) == nullptr) { |
84 | 9 | throw std::runtime_error("Invalid time string. Expecing either HH:MM, HH:MM:SS or SS format."); |
85 | 9 | } |
86 | 1.13k | } |
87 | 1.33k | } |
88 | | |
89 | 1.52k | return tm.tm_sec + 60*tm.tm_min + 60*60*tm.tm_hour; |
90 | 1.53k | } |
91 | | } /* namespace usbguard */ |
92 | | |
93 | | /* vim: set ts=2 sw=2 et */ |