]> git.netwichtig.de Git - user/henk/code/inspircd.git/blob - src/modules/m_timedbans.cpp
Merge branch 'master+dns'
[user/henk/code/inspircd.git] / src / modules / m_timedbans.cpp
1 /*
2  * InspIRCd -- Internet Relay Chat Daemon
3  *
4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5  *   Copyright (C) 2005-2008 Craig Edwards <craigedwards@brainbox.cc>
6  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
7  *   Copyright (C) 2006 Robin Burchell <robin+git@viroteck.net>
8  *
9  * This file is part of InspIRCd.  InspIRCd is free software: you can
10  * redistribute it and/or modify it under the terms of the GNU General Public
11  * License as published by the Free Software Foundation, version 2.
12  *
13  * This program is distributed in the hope that it will be useful, but WITHOUT
14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
16  * details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22
23 #include "inspircd.h"
24 #include "listmode.h"
25
26 /** Holds a timed ban
27  */
28 class TimedBan
29 {
30  public:
31         std::string channel;
32         std::string mask;
33         time_t expire;
34         Channel* chan;
35 };
36
37 typedef std::vector<TimedBan> timedbans;
38 timedbans TimedBanList;
39
40 /** Handle /TBAN
41  */
42 class CommandTban : public Command
43 {
44         ChanModeReference banmode;
45
46         bool IsBanSet(Channel* chan, const std::string& mask)
47         {
48                 ListModeBase* banlm = static_cast<ListModeBase*>(*banmode);
49                 const ListModeBase::ModeList* bans = banlm->GetList(chan);
50                 if (bans)
51                 {
52                         for (ListModeBase::ModeList::const_iterator i = bans->begin(); i != bans->end(); ++i)
53                         {
54                                 const ListModeBase::ListItem& ban = *i;
55                                 if (!strcasecmp(ban.mask.c_str(), mask.c_str()))
56                                         return true;
57                         }
58                 }
59
60                 return false;
61         }
62
63  public:
64         CommandTban(Module* Creator) : Command(Creator,"TBAN", 3)
65                 , banmode(Creator, "ban")
66         {
67                 syntax = "<channel> <duration> <banmask>";
68         }
69
70         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
71         {
72                 Channel* channel = ServerInstance->FindChan(parameters[0]);
73                 if (!channel)
74                 {
75                         user->WriteNumeric(ERR_NOSUCHNICK, "%s :No such channel", parameters[0].c_str());
76                         return CMD_FAILURE;
77                 }
78                 int cm = channel->GetPrefixValue(user);
79                 if (cm < HALFOP_VALUE)
80                 {
81                         user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s :You do not have permission to set bans on this channel",
82                                 channel->name.c_str());
83                         return CMD_FAILURE;
84                 }
85
86                 TimedBan T;
87                 std::string channelname = parameters[0];
88                 unsigned long duration = InspIRCd::Duration(parameters[1]);
89                 unsigned long expire = duration + ServerInstance->Time();
90                 if (duration < 1)
91                 {
92                         user->WriteNotice("Invalid ban time");
93                         return CMD_FAILURE;
94                 }
95                 std::string mask = parameters[2];
96                 bool isextban = ((mask.size() > 2) && (mask[1] == ':'));
97                 if (!isextban && !InspIRCd::IsValidMask(mask))
98                         mask.append("!*@*");
99
100                 if (IsBanSet(channel, mask))
101                 {
102                         user->WriteNotice("Ban already set");
103                         return CMD_FAILURE;
104                 }
105
106                 Modes::ChangeList setban;
107                 setban.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), mask);
108                 // Pass the user (instead of ServerInstance->FakeClient) to ModeHandler::Process() to
109                 // make it so that the user sets the mode themselves
110                 ServerInstance->Modes->Process(user, channel, NULL, setban);
111                 if (ServerInstance->Modes->GetLastParse().empty())
112                 {
113                         user->WriteNotice("Invalid ban mask");
114                         return CMD_FAILURE;
115                 }
116
117                 CUList tmp;
118                 T.channel = channelname;
119                 T.mask = mask;
120                 T.expire = expire + (IS_REMOTE(user) ? 5 : 0);
121                 T.chan = channel;
122                 TimedBanList.push_back(T);
123
124                 // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above
125                 ModeHandler* mh = ServerInstance->Modes->FindMode('h', MODETYPE_CHANNEL);
126                 char pfxchar = (mh && mh->name == "halfop") ? '%' : '@';
127
128                 channel->WriteAllExcept(ServerInstance->FakeClient, true, pfxchar, tmp, "NOTICE %s :%s added a timed ban on %s lasting for %ld seconds.", channel->name.c_str(), user->nick.c_str(), mask.c_str(), duration);
129                 return CMD_SUCCESS;
130         }
131
132         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
133         {
134                 return ROUTE_BROADCAST;
135         }
136 };
137
138 class BanWatcher : public ModeWatcher
139 {
140  public:
141         BanWatcher(Module* parent)
142                 : ModeWatcher(parent, "ban", MODETYPE_CHANNEL)
143         {
144         }
145
146         void AfterMode(User* source, User* dest, Channel* chan, const std::string& banmask, bool adding)
147         {
148                 if (adding)
149                         return;
150
151                 irc::string listitem = banmask.c_str();
152                 irc::string thischan = chan->name.c_str();
153                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); ++i)
154                 {
155                         irc::string target = i->mask.c_str();
156                         irc::string tchan = i->channel.c_str();
157                         if ((listitem == target) && (tchan == thischan))
158                         {
159                                 TimedBanList.erase(i);
160                                 break;
161                         }
162                 }
163         }
164 };
165
166 class ChannelMatcher
167 {
168         Channel* const chan;
169
170  public:
171         ChannelMatcher(Channel* ch)
172                 : chan(ch)
173         {
174         }
175
176         bool operator()(const TimedBan& tb) const
177         {
178                 return (tb.chan == chan);
179         }
180 };
181
182 class ModuleTimedBans : public Module
183 {
184         CommandTban cmd;
185         BanWatcher banwatcher;
186
187  public:
188         ModuleTimedBans()
189                 : cmd(this)
190                 , banwatcher(this)
191         {
192         }
193
194         void OnBackgroundTimer(time_t curtime) CXX11_OVERRIDE
195         {
196                 timedbans expired;
197                 for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
198                 {
199                         if (curtime > i->expire)
200                         {
201                                 expired.push_back(*i);
202                                 i = TimedBanList.erase(i);
203                         }
204                         else
205                                 ++i;
206                 }
207
208                 for (timedbans::iterator i = expired.begin(); i != expired.end(); i++)
209                 {
210                         std::string chan = i->channel;
211                         std::string mask = i->mask;
212                         Channel* cr = ServerInstance->FindChan(chan);
213                         if (cr)
214                         {
215                                 CUList empty;
216                                 std::string expiry = "*** Timed ban on " + chan + " expired.";
217                                 cr->WriteAllExcept(ServerInstance->FakeClient, true, '@', empty, "NOTICE %s :%s", cr->name.c_str(), expiry.c_str());
218                                 ServerInstance->PI->SendChannelNotice(cr, '@', expiry);
219
220                                 Modes::ChangeList setban;
221                                 setban.push_remove(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), mask);
222                                 ServerInstance->Modes->Process(ServerInstance->FakeClient, cr, NULL, setban);
223                         }
224                 }
225         }
226
227         void OnChannelDelete(Channel* chan)
228         {
229                 // Remove all timed bans affecting the channel from internal bookkeeping
230                 TimedBanList.erase(std::remove_if(TimedBanList.begin(), TimedBanList.end(), ChannelMatcher(chan)), TimedBanList.end());
231         }
232
233         Version GetVersion() CXX11_OVERRIDE
234         {
235                 return Version("Adds timed bans", VF_COMMON | VF_VENDOR);
236         }
237 };
238
239 MODULE_INIT(ModuleTimedBans)