2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007, 2009 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
8 * Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
9 * Copyright (C) 2007 Oliver Lupton <oliverlupton@gmail.com>
11 * This file is part of InspIRCd. InspIRCd is free software: you can
12 * redistribute it and/or modify it under the terms of the GNU General Public
13 * License as published by the Free Software Foundation, version 2.
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 /* Originally written by Om, January 2009
31 class BanRedirectEntry
34 std::string targetchan;
37 BanRedirectEntry(const std::string &target = "", const std::string &mask = "")
38 : targetchan(target), banmask(mask)
43 typedef std::vector<BanRedirectEntry> BanRedirectList;
45 class BanRedirect : public ModeWatcher
47 ChanModeReference ban;
49 SimpleExtItem<BanRedirectList> extItem;
50 BanRedirect(Module* parent)
51 : ModeWatcher(parent, "ban", MODETYPE_CHANNEL)
53 , extItem("banredirect", parent)
57 bool BeforeMode(User* source, User* dest, Channel* channel, std::string ¶m, bool adding)
59 /* nick!ident@host -> nick!ident@host
60 * nick!ident@host#chan -> nick!ident@host#chan
61 * nick@host#chan -> nick!*@host#chan
62 * nick!ident#chan -> nick!ident@*#chan
63 * nick#chan -> nick!*@*#chan
66 if ((channel) && !param.empty())
68 BanRedirectList* redirects;
71 enum { NICK, IDENT, HOST, CHAN } current = NICK;
72 std::string::iterator start_pos = param.begin();
74 if (param.length() >= 2 && param[1] == ':')
77 ListModeBase* banlm = static_cast<ListModeBase*>(*ban);
78 unsigned int maxbans = banlm->GetLimit(channel);
79 ListModeBase::ModeList* list = banlm->GetList(channel);
80 if ((list) && (adding) && (maxbans <= list->size()))
82 source->WriteNumeric(ERR_BANLISTFULL, "%s :Channel ban list for %s is full (maximum entries for this channel is %u)", channel->name.c_str(), channel->name.c_str(), maxbans);
86 for(std::string::iterator curr = start_pos; curr != param.end(); curr++)
93 mask[current].assign(start_pos, curr);
100 mask[current].assign(start_pos, curr);
107 mask[current].assign(start_pos, curr);
114 if(mask[current].empty())
116 mask[current].assign(start_pos, param.end());
119 /* nick@host wants to be changed to *!nick@host rather than nick!*@host... */
120 if(mask[NICK].length() && mask[HOST].length() && mask[IDENT].empty())
122 /* std::string::swap() is fast - it runs in constant time */
123 mask[NICK].swap(mask[IDENT]);
126 for(int i = 0; i < 3; i++)
134 param.assign(mask[NICK]).append(1, '!').append(mask[IDENT]).append(1, '@').append(mask[HOST]);
136 if(mask[CHAN].length())
138 if (adding && IS_LOCAL(source))
140 if (!ServerInstance->IsChannel(mask[CHAN]))
142 source->WriteNumeric(ERR_NOSUCHCHANNEL, "%s :Invalid channel name in redirection (%s)", channel->name.c_str(), mask[CHAN].c_str());
146 Channel *c = ServerInstance->FindChan(mask[CHAN]);
149 source->WriteNumeric(690, ":Target channel %s must exist to be set as a redirect.", mask[CHAN].c_str());
152 else if (adding && c->GetPrefixValue(source) < OP_VALUE)
154 source->WriteNumeric(690, ":You must be opped on %s to set it as a redirect.", mask[CHAN].c_str());
158 if (assign(channel->name) == mask[CHAN])
160 source->WriteNumeric(690, "%s :You cannot set a ban redirection to the channel the ban is on", channel->name.c_str());
167 /* It's a properly valid redirecting ban, and we're adding it */
168 redirects = extItem.get(channel);
171 redirects = new BanRedirectList;
172 extItem.set(channel, redirects);
175 /* Here 'param' doesn't have the channel on it yet */
176 redirects->push_back(BanRedirectEntry(mask[CHAN], param));
179 param.append(mask[CHAN]);
183 /* Removing a ban, if there's no extensible there are no redirecting bans and we're fine. */
184 redirects = extItem.get(channel);
187 /* But there were, so we need to remove the matching one if there is one */
189 for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
192 if((irc::string(redir->targetchan.c_str()) == irc::string(mask[CHAN].c_str())) && (irc::string(redir->banmask.c_str()) == irc::string(param.c_str())))
194 redirects->erase(redir);
196 if(redirects->empty())
198 extItem.unset(channel);
206 /* Append the channel so the default +b handler can remove the entry too */
207 param.append(mask[CHAN]);
216 class ModuleBanRedirect : public Module
220 ChanModeReference limitmode;
221 ChanModeReference redirectmode;
227 , limitmode(this, "limit")
228 , redirectmode(this, "redirect")
232 void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
234 if(target_type == TYPE_CHANNEL)
236 Channel* chan = static_cast<Channel*>(item);
237 BanRedirectList* redirects = re.extItem.get(chan);
241 irc::modestacker modestack(false);
243 for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
245 modestack.Push('b', i->targetchan.insert(0, i->banmask));
248 for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
250 modestack.PushPlus();
251 modestack.Push('b', i->banmask);
254 std::vector<std::string> stackresult;
255 stackresult.push_back(chan->name);
256 while (modestack.GetStackedLine(stackresult))
258 ServerInstance->Modes->Process(stackresult, ServerInstance->FakeClient, ModeParser::MODE_LOCALONLY);
259 stackresult.erase(stackresult.begin() + 1, stackresult.end());
265 ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
269 BanRedirectList* redirects = re.extItem.get(chan);
273 /* We actually had some ban redirects to check */
275 /* This was replaced with user->MakeHostIP() when I had a snprintf(), but MakeHostIP() doesn't seem to add the nick.
276 * Maybe we should have a GetFullIPHost() or something to match GetFullHost() and GetFullRealHost?
280 FIRST_MOD_RESULT(OnCheckChannelBan, result, (user, chan));
281 if (result == MOD_RES_ALLOW)
283 // they have a ban exception
284 return MOD_RES_PASSTHRU;
287 std::string ipmask(user->nick);
288 ipmask.append(1, '!').append(user->MakeHostIP());
290 for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
292 if(InspIRCd::Match(user->GetFullRealHost(), redir->banmask) || InspIRCd::Match(user->GetFullHost(), redir->banmask) || InspIRCd::MatchCIDR(ipmask, redir->banmask))
294 /* This prevents recursion when a user sets multiple ban redirects in a chain
297 * If we're here and nofollow is true then we're already redirecting this user
298 * and there's a redirecting ban set on this channel that matches him, too.
304 /* tell them they're banned and are being transferred */
305 Channel* destchan = ServerInstance->FindChan(redir->targetchan);
306 std::string destlimit;
309 destlimit = destchan->GetModeParameter(limitmode);
311 if(destchan && destchan->IsModeSet(redirectmode) && !destlimit.empty() && (destchan->GetUserCounter() >= atoi(destlimit.c_str())))
313 user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s :Cannot join channel (You are banned)", chan->name.c_str());
318 user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s :Cannot join channel (You are banned)", chan->name.c_str());
319 user->WriteNumeric(470, "%s %s :You are banned from this channel, so you are automatically transfered to the redirected channel.", chan->name.c_str(), redir->targetchan.c_str());
321 Channel::JoinUser(user, redir->targetchan);
329 return MOD_RES_PASSTHRU;
332 Version GetVersion() CXX11_OVERRIDE
334 return Version("Allows an extended ban (+b) syntax redirecting banned users to another channel", VF_COMMON|VF_VENDOR);
338 MODULE_INIT(ModuleBanRedirect)