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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
/* $ModDesc: Implements config tags which allow blocking of joins to channels */
class ModuleDenyChannels : public Module
{
private:
ConfigReader *Conf;
public:
ModuleDenyChannels(InspIRCd* Me) : Module(Me)
{
Conf = new ConfigReader(ServerInstance);
Implementation eventlist[] = { I_OnUserPreJoin, I_OnRehash };
ServerInstance->Modules->Attach(eventlist, this, 2);
}
virtual void OnRehash(User* user, const std::string ¶m)
{
delete Conf;
Conf = new ConfigReader(ServerInstance);
/* check for redirect validity and loops/chains */
for (int i =0; i < Conf->Enumerate("badchan"); i++)
{
std::string name = Conf->ReadValue("badchan","name",i);
std::string redirect = Conf->ReadValue("badchan","redirect",i);
if (!redirect.empty())
{
if (!ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
{
if (user)
user->WriteServ("NOTICE %s :Invalid badchan redirect '%s'", user->nick.c_str(), redirect.c_str());
throw ModuleException("Invalid badchan redirect, not a channel");
}
for (int j =0; j < Conf->Enumerate("badchan"); j++)
{
if (InspIRCd::Match(redirect, Conf->ReadValue("badchan","name",j)))
{
bool goodchan = false;
for (int k =0; k < Conf->Enumerate("goodchan"); k++)
{
if (InspIRCd::Match(redirect, Conf->ReadValue("goodchan","name",k)))
goodchan = true;
}
if (!goodchan)
{
/* <badchan:redirect> is a badchan */
if (user)
user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick.c_str(), name.c_str(), redirect.c_str());
throw ModuleException("Badchan redirect loop");
}
}
}
}
}
}
virtual ~ModuleDenyChannels()
{
delete Conf;
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR,API_VERSION);
}
virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
{
for (int j =0; j < Conf->Enumerate("badchan"); j++)
{
if (InspIRCd::Match(cname, Conf->ReadValue("badchan","name",j)))
{
if (IS_OPER(user) && Conf->ReadFlag("badchan","allowopers",j))
{
return 0;
}
else
{
std::string reason = Conf->ReadValue("badchan","reason",j);
std::string redirect = Conf->ReadValue("badchan","redirect",j);
for (int i = 0; i < Conf->Enumerate("goodchan"); i++)
{
if (InspIRCd::Match(cname, Conf->ReadValue("goodchan", "name", i)))
{
return 0;
}
}
if (ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
{
/* simple way to avoid potential loops: don't redirect to +L channels */
Channel *newchan = ServerInstance->FindChan(redirect);
if ((!newchan) || (!(newchan->IsModeSet('L'))))
{
user->WriteNumeric(926, "%s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick.c_str(),cname,cname,redirect.c_str(), reason.c_str());
Channel::JoinUser(ServerInstance,user,redirect.c_str(),false,"",false,ServerInstance->Time());
return 1;
}
}
user->WriteNumeric(926, "%s %s :Channel %s is forbidden: %s",user->nick.c_str(),cname,cname,reason.c_str());
return 1;
}
}
}
return 0;
}
};
MODULE_INIT(ModuleDenyChannels)
|
