1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "plugin_lib.h"
17
18 #include <dlfcn.h>
19 #include <filesystem>
20 #include <string>
21 #include <openssl/crypto.h>
22
23 #include "avsession_log.h"
24
25 namespace OHOS::AVSession {
26
PluginLib(const std::string &libName)27 PluginLib::PluginLib(const std::string &libName)
28 : libName_(GetRealPath(libName)), handle_(nullptr)
29 {
30 if (!CheckPathExist(libName_)) {
31 SLOGE("%{public}s path invalid", libName_.c_str());
32 return;
33 }
34 handle_ = dlopen(libName_.c_str(), RTLD_NOW);
35 if (handle_ == nullptr) {
36 LogDlfcnErr("open lib failed");
37 return;
38 }
39 SLOGI("%{public}s open succ", libName_.c_str());
40 }
41
~PluginLib()42 PluginLib::~PluginLib()
43 {
44 #ifndef TEST_COVERAGE
45 if (handle_ != nullptr) {
46 OPENSSL_thread_stop();
47 }
48 if (handle_ == nullptr || dlclose(handle_) != 0) {
49 LogDlfcnErr("close lib failed");
50 }
51 #endif
52 SLOGI("%{public}s close succ", libName_.c_str());
53 }
54
LoadSymbol(const std::string &symbolName)55 void *PluginLib::LoadSymbol(const std::string &symbolName)
56 {
57 if (handle_ == nullptr) {
58 SLOGE("%{public}s lib is null", libName_.c_str());
59 return nullptr;
60 }
61 void *sym = dlsym(handle_, symbolName.c_str());
62 if (sym == nullptr) {
63 LogDlfcnErr("load symbol [" + symbolName + "] failed");
64 return nullptr;
65 }
66 SLOGI("%{public}s load symbol succ", symbolName.c_str());
67 return sym;
68 }
69
LogDlfcnErr(const std::string &desc)70 void PluginLib::LogDlfcnErr(const std::string &desc)
71 {
72 SLOGE("[%{public}s] %{public}s, reason = %{public}s",
73 libName_.c_str(), desc.c_str(), dlerror());
74 // reset errors
75 dlerror();
76 }
77
GetRealPath(const std::string &path)78 std::string PluginLib::GetRealPath(const std::string &path)
79 {
80 auto realPath = std::filesystem::weakly_canonical(path);
81 return realPath.string();
82 }
83
CheckPathExist(const std::string &path)84 bool PluginLib::CheckPathExist(const std::string &path)
85 {
86 return std::filesystem::exists(path);
87 }
88
89 } // namespace OHOS::AVSession