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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2013, 2018-2020 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012-2014 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2005-2007, 2010 Craig Edwards <brain@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/account.h"
// Holds information about a <hostchange> rule.
class HostRule
{
public:
enum HostChangeAction
{
// Add the user's account name to their hostname.
HCA_ADDACCOUNT,
// Add the user's nickname to their hostname.
HCA_ADDNICK,
// Set the user's hostname to the specific value.
HCA_SET
};
private:
HostChangeAction action;
std::string host;
std::string mask;
insp::flat_set<int> ports;
std::string prefix;
std::string suffix;
public:
HostRule(const std::string& Mask, const std::string& Host, const insp::flat_set<int>& Ports)
: action(HCA_SET)
, host(Host)
, mask(Mask)
, ports(Ports)
{
}
HostRule(HostChangeAction Action, const std::string& Mask, const insp::flat_set<int>& Ports, const std::string& Prefix, const std::string& Suffix)
: action(Action)
, mask(Mask)
, ports(Ports)
, prefix(Prefix)
, suffix(Suffix)
{
}
HostChangeAction GetAction() const
{
return action;
}
const std::string& GetHost() const
{
return host;
}
bool Matches(LocalUser* user) const
{
if (!ports.empty() && !ports.count(user->server_sa.port()))
return false;
if (InspIRCd::MatchCIDR(user->MakeHost(), mask))
return true;
return InspIRCd::MatchCIDR(user->MakeHostIP(), mask);
}
void Wrap(const std::string& value, std::string& out) const
{
if (!prefix.empty())
out.append(prefix);
out.append(value);
if (!suffix.empty())
out.append(suffix);
}
};
typedef std::vector<HostRule> HostRules;
class ModuleHostChange : public Module
{
private:
std::bitset<UCHAR_MAX> hostmap;
HostRules hostrules;
std::string CleanName(const std::string& name)
{
std::string buffer;
buffer.reserve(name.length());
for (std::string::const_iterator iter = name.begin(); iter != name.end(); ++iter)
{
if (hostmap.test(static_cast<unsigned char>(*iter)))
{
buffer.push_back(*iter);
}
}
return buffer;
}
public:
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
HostRules rules;
ConfigTagList tags = ServerInstance->Config->ConfTags("hostchange");
for (ConfigIter i = tags.first; i != tags.second; ++i)
{
ConfigTag* tag = i->second;
// Ensure that we have the <hostchange:mask> parameter.
const std::string mask = tag->getString("mask");
if (mask.empty())
throw ModuleException("<hostchange:mask> is a mandatory field, at " + tag->getTagLocation());
insp::flat_set<int> ports;
const std::string portlist = tag->getString("ports");
if (!portlist.empty())
{
irc::portparser portrange(portlist, false);
while (int port = portrange.GetToken())
ports.insert(port);
}
// Determine what type of host rule this is.
const std::string action = tag->getString("action");
if (stdalgo::string::equalsci(action, "addaccount"))
{
// The hostname is in the format [prefix]<account>[suffix].
rules.push_back(HostRule(HostRule::HCA_ADDACCOUNT, mask, ports, tag->getString("prefix"), tag->getString("suffix")));
}
else if (stdalgo::string::equalsci(action, "addnick"))
{
// The hostname is in the format [prefix]<nick>[suffix].
rules.push_back(HostRule(HostRule::HCA_ADDNICK, mask, ports, tag->getString("prefix"), tag->getString("suffix")));
}
else if (stdalgo::string::equalsci(action, "set"))
{
// Ensure that we have the <hostchange:value> parameter.
const std::string value = tag->getString("value");
if (value.empty())
throw ModuleException("<hostchange:value> is a mandatory field when using the 'set' action, at " + tag->getTagLocation());
// The hostname is in the format <value>.
rules.push_back(HostRule(mask, value, ports));
continue;
}
else
{
throw ModuleException(action + " is an invalid <hostchange:action> type, at " + tag->getTagLocation());
}
}
ConfigTag* tag = ServerInstance->Config->ConfValue("hostname");
const std::string hmap = tag->getString("charmap", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-_/0123456789", 1);
hostmap.reset();
for (std::string::const_iterator iter = hmap.begin(); iter != hmap.end(); ++iter)
hostmap.set(static_cast<unsigned char>(*iter));
hostrules.swap(rules);
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Allows the server administrator to define custom rules for applying hostnames to users.", VF_VENDOR);
}
void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
{
for (HostRules::const_iterator iter = hostrules.begin(); iter != hostrules.end(); ++iter)
{
const HostRule& rule = *iter;
if (!rule.Matches(user))
continue;
std::string newhost;
if (rule.GetAction() == HostRule::HCA_ADDACCOUNT)
{
// Retrieve the account name.
const AccountExtItem* accountext = GetAccountExtItem();
const std::string* accountptr = accountext ? accountext->get(user) : NULL;
if (!accountptr)
continue;
// Remove invalid hostname characters.
std::string accountname = CleanName(*accountptr);
if (accountname.empty())
continue;
// Create the hostname.
rule.Wrap(accountname, newhost);
}
else if (rule.GetAction() == HostRule::HCA_ADDNICK)
{
// Remove invalid hostname characters.
const std::string nickname = CleanName(user->nick);
if (nickname.empty())
continue;
// Create the hostname.
rule.Wrap(nickname, newhost);
}
else if (rule.GetAction() == HostRule::HCA_SET)
{
newhost.assign(rule.GetHost());
}
if (!newhost.empty())
{
user->WriteNotice("Setting your virtual host: " + newhost);
if (!user->ChangeDisplayedHost(newhost))
user->WriteNotice("Could not set your virtual host: " + newhost);
return;
}
}
}
};
MODULE_INIT(ModuleHostChange)
|
