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
|
/*
* Copyright (C) 2004-2024 ZNC, see the NOTICE file for details.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <znc/Modules.h>
#include <znc/Chan.h>
#include <time.h>
class CCtcpFloodMod : public CModule {
public:
MODCONSTRUCTOR(CCtcpFloodMod) {
AddHelpCommand();
AddCommand("Secs", t_d("<limit>"), t_d("Set seconds limit"),
[=](const CString& sLine) { OnSecsCommand(sLine); });
AddCommand("Lines", t_d("<limit>"), t_d("Set lines limit"),
[=](const CString& sLine) { OnLinesCommand(sLine); });
AddCommand("Show", "", t_d("Show the current limits"),
[=](const CString& sLine) { OnShowCommand(sLine); });
}
~CCtcpFloodMod() override {}
void Save() {
// We save the settings twice because the module arguments can
// be more easily edited via webadmin, while the SetNV() stuff
// survives e.g. /msg *status reloadmod ctcpflood.
SetNV("secs", CString(m_iThresholdSecs));
SetNV("msgs", CString(m_iThresholdMsgs));
SetArgs(CString(m_iThresholdMsgs) + " " + CString(m_iThresholdSecs));
}
bool OnLoad(const CString& sArgs, CString& sMessage) override {
m_iThresholdMsgs = sArgs.Token(0).ToUInt();
m_iThresholdSecs = sArgs.Token(1).ToUInt();
if (m_iThresholdMsgs == 0 || m_iThresholdSecs == 0) {
m_iThresholdMsgs = GetNV("msgs").ToUInt();
m_iThresholdSecs = GetNV("secs").ToUInt();
}
if (m_iThresholdSecs == 0) m_iThresholdSecs = 2;
if (m_iThresholdMsgs == 0) m_iThresholdMsgs = 4;
Save();
return true;
}
EModRet Message(const CNick& Nick, const CString& sMessage) {
// We never block /me, because it doesn't cause a reply
if (sMessage.Token(0).Equals("ACTION")) return CONTINUE;
if (m_tLastCTCP + m_iThresholdSecs < time(nullptr)) {
m_tLastCTCP = time(nullptr);
m_iNumCTCP = 0;
}
m_iNumCTCP++;
if (m_iNumCTCP < m_iThresholdMsgs)
return CONTINUE;
else if (m_iNumCTCP == m_iThresholdMsgs)
PutModule(t_f("Limit reached by {1}, blocking all CTCP")(
Nick.GetHostMask()));
// Reset the timeout so that we continue blocking messages
m_tLastCTCP = time(nullptr);
return HALT;
}
EModRet OnPrivCTCP(CNick& Nick, CString& sMessage) override {
return Message(Nick, sMessage);
}
EModRet OnChanCTCP(CNick& Nick, CChan& Channel,
CString& sMessage) override {
return Message(Nick, sMessage);
}
void OnSecsCommand(const CString& sCommand) {
const CString& sArg = sCommand.Token(1, true);
if (sArg.empty()) {
PutModule(t_s("Usage: Secs <limit>"));
return;
}
m_iThresholdSecs = sArg.ToUInt();
if (m_iThresholdSecs == 0) m_iThresholdSecs = 1;
OnShowCommand("");
Save();
}
void OnLinesCommand(const CString& sCommand) {
const CString& sArg = sCommand.Token(1, true);
if (sArg.empty()) {
PutModule(t_s("Usage: Lines <limit>"));
return;
}
m_iThresholdMsgs = sArg.ToUInt();
if (m_iThresholdMsgs == 0) m_iThresholdMsgs = 2;
OnShowCommand("");
Save();
}
void OnShowCommand(const CString& sCommand) {
CString sMsgs = t_p("1 CTCP message", "{1} CTCP messages",
m_iThresholdMsgs)(m_iThresholdMsgs);
CString sSecs = t_p("every second", "every {1} seconds",
m_iThresholdSecs)(m_iThresholdSecs);
PutModule(t_f("Current limit is {1} {2}")(sMsgs, sSecs));
}
private:
time_t m_tLastCTCP = 0;
unsigned int m_iNumCTCP = 0;
time_t m_iThresholdSecs{};
unsigned int m_iThresholdMsgs{};
};
template <>
void TModInfo<CCtcpFloodMod>(CModInfo& Info) {
Info.SetWikiPage("ctcpflood");
Info.SetHasArgs(true);
Info.SetArgsHelpText(Info.t_s(
"This user module takes none to two arguments. The first argument is "
"the number of lines after which the flood-protection is triggered. "
"The second argument is the time (sec) to in which the number of lines "
"is reached. The default setting is 4 CTCPs in 2 seconds"));
}
USERMODULEDEFS(CCtcpFloodMod, t_s("Don't forward CTCP floods to clients"))
|
