1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175 | // Copyright (C) 2016-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Kea Hooks Basic
// Commercial End User License Agreement v2.0. See COPYING file in the premium/
// directory.
/// @file load_unload.cc Defines the load and unload hooks library functions.
#include <config.h>
#include <asiolink/io_service.h>
#include <asiolink/io_service_mgr.h>
#include <cc/data.h>
#include <hooks/hooks.h>
#include <database/database_connection.h>
#include <dhcpsrv/cfgmgr.h>
#include <process/daemon.h>
#include <legal_log_log.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <backend_store.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <boost/lexical_cast.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <sstream><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <string><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
using namespace isc;
using namespace isc::asiolink;
using namespace isc::data;
using namespace isc::db;
using namespace isc::dhcp;
using namespace isc::hooks;
using namespace isc::process;
using namespace isc::legal_log;
using namespace std;
// Functions accessed by the hooks framework use C linkage to avoid the name
// mangling that accompanies use of the C++ compiler as well as to avoid
// issues related to namespaces.
extern "C" {
/// @brief Called by the Hooks library manager when the library is loaded.
///
/// Instantiates the BackendStore and then opens it. If there is no type
/// or type is logfile, use a RotatingFile else use a Database.
///
/// @return 0 upon success, non-zero if the legal file cannot be opened
int load(LibraryHandle& handle) {
try {
// Make the hook library not loadable by d2 or ca.
uint16_t family = CfgMgr::instance().getFamily();
const std::string& proc_name = Daemon::getProcName();
if (family == AF_INET) {
if (proc_name != "kea-dhcp4") {
isc_throw(isc::Unexpected, "Bad process name: " << proc_name
<< ", expected kea-dhcp4");
}
} else {
if (proc_name != "kea-dhcp6") {
isc_throw(isc::Unexpected, "Bad process name: " << proc_name
<< ", expected kea-dhcp6");
}
}
// Get and decode parameters.
ConstElementPtr const& parameters(handle.getParameters());
if (!parameters || !parameters->get("type") ||
parameters->get("type")->stringValue() == "logfile") {
BackendStore::parseFile(parameters);
} else {
BackendStore::parseDatabase(parameters);
}
try {
BackendStore::parseExtraParameters(parameters);
BackendStore::setConfig(parameters);
BackendStore::instance()->open();
} catch (const isc::db::DbOpenErrorWithRetry& err) {
std::string redacted;
try {
redacted = DatabaseConnection::redactedAccessString(BackendStore::getParameters());
} catch (...) {
}
LOG_INFO(legal_log_logger, LEGAL_LOG_DB_OPEN_CONNECTION_WITH_RETRY_FAILED)
.arg(redacted).arg(err.what());
}
} catch (const std::exception& ex) {
// Log the error and return failure.
LOG_ERROR(legal_log_logger, LEGAL_LOG_LOAD_ERROR)
.arg(ex.what());
return (1);
}
return (0);
}
/// @brief Called by the Hooks library manager when the library is unloaded.
///
/// Explicitly destroys the BackendStore instance. Any errors are logged but
/// swallowed.
///
/// @return Always 0.
int unload() {
try {
// Since it's "global" Let's explicitly destroy it now rather
// than indeterminately. Note, BackendStore destructor will close
// the store.
BackendStore::instance().reset();
IOServicePtr io_service = BackendStore::getIOService();
if (io_service) {
IOServiceMgr::instance().unregisterIOService(io_service);
io_service->stopAndPoll();
BackendStore::setIOService(IOServicePtr());
}
} catch (const std::exception& ex) {
// On the off chance something goes awry, catch it and log it.
// @todo Not sure if we should return a non-zero result or not.
LOG_ERROR(legal_log_logger, LEGAL_LOG_UNLOAD_ERROR)
.arg(ex.what());
}
return (0);
}
/// @brief dhcp4_srv_configured callout implementation.
///
/// @param handle callout handle.
int dhcp4_srv_configured(CalloutHandle& handle) {
try {
BackendStore::setIOService(IOServicePtr(new IOService()));
IOServiceMgr::instance().registerIOService(BackendStore::getIOService());
} catch (const std::exception& ex) {
LOG_ERROR(legal_log_logger, LEGAL_LOG_LOAD_ERROR)
.arg(ex.what());
handle.setStatus(isc::hooks::CalloutHandle::NEXT_STEP_DROP);
ostringstream os;
os << "Error: " << ex.what();
string error(os.str());
handle.setArgument("error", error);
return (1);
}
return (0);
}
/// @brief dhcp6_srv_configured callout implementation.
///
/// @param handle callout handle.
int dhcp6_srv_configured(CalloutHandle& handle) {
try {
BackendStore::setIOService(IOServicePtr(new IOService()));
IOServiceMgr::instance().registerIOService(BackendStore::getIOService());
} catch (const std::exception& ex) {
LOG_ERROR(legal_log_logger, LEGAL_LOG_LOAD_ERROR)
.arg(ex.what());
handle.setStatus(isc::hooks::CalloutHandle::NEXT_STEP_DROP);
ostringstream os;
os << "Error: " << ex.what();
string error(os.str());
handle.setArgument("error", error);
return (1);
}
return (0);
}
/// @brief This function is called to retrieve the multi-threading compatibility.
///
/// @return 1 which means compatible with multi-threading.
int multi_threading_compatible() {
return (1);
}
}
|