2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007-2008 John Brooks <john.brooks@dereferenced.net>
6 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
7 * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
8 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
9 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
10 * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
12 * This file is part of InspIRCd. InspIRCd is free software: you can
13 * redistribute it and/or modify it under the terms of the GNU General Public
14 * License as published by the Free Software Foundation, version 2.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 /* $ModDesc: Change user's hosts connecting from known CGI:IRC hosts */
30 enum CGItype { INVALID, PASS, IDENT, PASSFIRST, IDENTFIRST, WEBIRC };
33 /** Holds a CGI site's details
42 CGIhost(const std::string &mask = "", CGItype t = IDENTFIRST, const std::string &spassword ="")
43 : hostmask(mask), type(t), password(spassword)
47 typedef std::vector<CGIhost> CGIHostlist;
51 * This is used for the webirc method of CGIIRC auth, and is (really) the best way to do these things.
52 * Syntax: WEBIRC password client hostname ip
53 * Where password is a shared key, client is the name of the "client" and version (e.g. cgiirc), hostname
54 * is the resolved host of the client issuing the command and IP is the real IP of the client.
57 * To tie in with the rest of cgiirc module, and to avoid race conditions, /webirc is only processed locally
58 * and simply sets metadata on the user, which is later decoded on full connect to give something meaningful.
60 class CommandWebirc : public Command
64 StringExtItem realhost;
66 LocalStringExt webirc_hostname;
67 LocalStringExt webirc_ip;
70 CommandWebirc(Module* Creator)
71 : Command(Creator, "WEBIRC", 4),
72 realhost("cgiirc_realhost", Creator), realip("cgiirc_realip", Creator),
73 webirc_hostname("cgiirc_webirc_hostname", Creator), webirc_ip("cgiirc_webirc_ip", Creator)
75 works_before_reg = true;
76 this->syntax = "password client hostname ip";
78 CmdResult Handle(const std::vector<std::string> ¶meters, User *user)
80 if(user->registered == REG_ALL)
83 for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
85 if(InspIRCd::Match(user->host, iter->hostmask, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(user->GetIPString(), iter->hostmask, ascii_case_insensitive_map))
87 if(iter->type == WEBIRC && parameters[0] == iter->password)
89 realhost.set(user, user->host);
90 realip.set(user, user->GetIPString());
92 ServerInstance->SNO->WriteGlobalSno('a', "Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", user->nick.c_str(), user->host.c_str(), parameters[2].c_str(), user->host.c_str());
93 webirc_hostname.set(user, parameters[2]);
94 webirc_ip.set(user, parameters[3]);
100 ServerInstance->SNO->WriteGlobalSno('a', "Connecting user %s tried to use WEBIRC, but didn't match any configured webirc blocks.", user->GetFullRealHost().c_str());
106 /** Resolver for CGI:IRC hostnames encoded in ident/GECOS
108 class CGIResolver : public Resolver
111 std::string theiruid;
112 LocalIntExt& waiting;
115 CGIResolver(Module* me, bool NotifyOpers, const std::string &source, bool forward, LocalUser* u,
116 const std::string &type, bool &cached, LocalIntExt& ext)
117 : Resolver(source, forward ? DNS_QUERY_A : DNS_QUERY_PTR4, cached, me), typ(type), theiruid(u->uuid),
118 waiting(ext), notify(NotifyOpers)
122 virtual void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
124 /* Check the user still exists */
125 User* them = ServerInstance->FindUUID(theiruid);
129 ServerInstance->SNO->WriteGlobalSno('a', "Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", them->nick.c_str(), them->host.c_str(), result.c_str(), typ.c_str());
131 if (result.length() > 64)
134 them->dhost = result;
135 them->InvalidateCache();
136 them->CheckLines(true);
140 virtual void OnError(ResolverError e, const std::string &errormessage)
142 User* them = ServerInstance->FindUUID(theiruid);
146 ServerInstance->SNO->WriteToSnoMask('a', "Connecting user %s detected as using CGI:IRC (%s), but their host can't be resolved from their %s!", them->nick.c_str(), them->host.c_str(), typ.c_str());
150 virtual ~CGIResolver()
152 User* them = ServerInstance->FindUUID(theiruid);
155 int count = waiting.get(them);
157 waiting.set(them, count - 1);
161 class ModuleCgiIRC : public Module
166 ModuleCgiIRC() : cmd(this), waiting("cgiirc-delay", this)
173 ServerInstance->AddCommand(&cmd);
174 ServerInstance->Extensions.Register(&cmd.realhost);
175 ServerInstance->Extensions.Register(&cmd.realip);
176 ServerInstance->Extensions.Register(&cmd.webirc_hostname);
177 ServerInstance->Extensions.Register(&cmd.webirc_ip);
178 ServerInstance->Extensions.Register(&waiting);
180 Implementation eventlist[] = { I_OnRehash, I_OnUserRegister, I_OnCheckReady };
181 ServerInstance->Modules->Attach(eventlist, this, 3);
184 void OnRehash(User* user)
188 // Do we send an oper notice when a CGI:IRC has their host changed?
189 cmd.notify = ServerInstance->Config->ConfValue("cgiirc")->getBool("opernotice", true);
191 ConfigTagList tags = ServerInstance->Config->ConfTags("cgihost");
192 for (ConfigIter i = tags.first; i != tags.second; ++i)
194 ConfigTag* tag = i->second;
195 std::string hostmask = tag->getString("mask"); // An allowed CGI:IRC host
196 std::string type = tag->getString("type"); // What type of user-munging we do on this host.
197 std::string password = tag->getString("password");
199 if(hostmask.length())
201 if (type == "webirc" && !password.length()) {
202 ServerInstance->Logs->Log("CONFIG",DEFAULT, "m_cgiirc: Missing password in config: %s", hostmask.c_str());
206 CGItype cgitype = INVALID;
209 else if (type == "ident")
211 else if (type == "passfirst")
213 else if (type == "webirc")
218 if (cgitype == INVALID)
221 cmd.Hosts.push_back(CGIhost(hostmask,cgitype, password.length() ? password : "" ));
226 ServerInstance->Logs->Log("CONFIG",DEFAULT, "m_cgiirc.so: Invalid <cgihost:mask> value in config: %s", hostmask.c_str());
232 ModResult OnCheckReady(LocalUser *user)
234 if (waiting.get(user))
237 std::string *webirc_ip = cmd.webirc_ip.get(user);
239 return MOD_RES_PASSTHRU;
241 ServerInstance->Users->RemoveCloneCounts(user);
242 user->SetClientIP(webirc_ip->c_str());
243 cmd.webirc_ip.unset(user);
245 std::string* webirc_hostname = cmd.webirc_hostname.get(user);
246 if (webirc_hostname && webirc_hostname->length() < 64)
247 user->host = user->dhost = *webirc_hostname;
249 user->host = user->dhost = user->GetIPString();
251 user->InvalidateCache();
252 cmd.webirc_hostname.unset(user);
254 ServerInstance->Users->AddLocalClone(user);
255 ServerInstance->Users->AddGlobalClone(user);
258 user->CheckLines(true);
262 return MOD_RES_PASSTHRU;
265 ModResult OnUserRegister(LocalUser* user)
267 for(CGIHostlist::iterator iter = cmd.Hosts.begin(); iter != cmd.Hosts.end(); iter++)
269 if(InspIRCd::Match(user->host, iter->hostmask, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(user->GetIPString(), iter->hostmask, ascii_case_insensitive_map))
272 if(iter->type == PASS)
274 CheckPass(user); // We do nothing if it fails so...
275 user->CheckLines(true);
277 else if(iter->type == PASSFIRST && !CheckPass(user))
279 // If the password lookup failed, try the ident
280 CheckIdent(user); // If this fails too, do nothing
281 user->CheckLines(true);
283 else if(iter->type == IDENT)
285 CheckIdent(user); // Nothing on failure.
286 user->CheckLines(true);
288 else if(iter->type == IDENTFIRST && !CheckIdent(user))
290 // If the ident lookup fails, try the password.
292 user->CheckLines(true);
294 else if(iter->type == WEBIRC)
296 // We don't need to do anything here
298 return MOD_RES_PASSTHRU;
301 return MOD_RES_PASSTHRU;
304 bool CheckPass(LocalUser* user)
306 if(IsValidHost(user->password))
308 cmd.realhost.set(user, user->host);
309 cmd.realip.set(user, user->GetIPString());
310 user->host = user->password;
311 user->dhost = user->password;
312 user->InvalidateCache();
314 ServerInstance->Users->RemoveCloneCounts(user);
315 user->SetClientIP(user->password.c_str());
316 ServerInstance->Users->AddLocalClone(user);
317 ServerInstance->Users->AddGlobalClone(user);
324 CGIResolver* r = new CGIResolver(this, cmd.notify, user->password, false, user, "PASS", cached, waiting);
325 ServerInstance->AddResolver(r, cached);
326 waiting.set(user, waiting.get(user) + 1);
331 ServerInstance->SNO->WriteToSnoMask('a', "Connecting user %s detected as using CGI:IRC (%s), but I could not resolve their hostname!", user->nick.c_str(), user->host.c_str());
334 user->password.clear();
341 bool CheckIdent(LocalUser* user)
344 int len = user->ident.length();
348 ident = user->ident.c_str();
349 else if(len == 9 && user->ident[0] == '~')
350 ident = user->ident.c_str() + 1;
355 unsigned long ipaddr = strtoul(ident, NULL, 16);
358 newip.s_addr = htonl(ipaddr);
359 char* newipstr = inet_ntoa(newip);
361 cmd.realhost.set(user, user->host);
362 cmd.realip.set(user, user->GetIPString());
363 ServerInstance->Users->RemoveCloneCounts(user);
364 user->SetClientIP(newipstr);
365 ServerInstance->Users->AddLocalClone(user);
366 ServerInstance->Users->AddGlobalClone(user);
369 user->host = newipstr;
370 user->dhost = newipstr;
371 user->ident.assign("~cgiirc", 0, 8);
376 CGIResolver* r = new CGIResolver(this, cmd.notify, newipstr, false, user, "IDENT", cached, waiting);
377 ServerInstance->AddResolver(r, cached);
378 waiting.set(user, waiting.get(user) + 1);
382 user->InvalidateCache();
385 ServerInstance->SNO->WriteToSnoMask('a', "Connecting user %s detected as using CGI:IRC (%s), but I could not resolve their hostname!", user->nick.c_str(), user->host.c_str());
391 bool IsValidHost(const std::string &host)
393 if(!host.size() || host.size() > 64)
396 for(unsigned int i = 0; i < host.size(); i++)
398 if( ((host[i] >= '0') && (host[i] <= '9')) ||
399 ((host[i] >= 'A') && (host[i] <= 'Z')) ||
400 ((host[i] >= 'a') && (host[i] <= 'z')) ||
401 ((host[i] == '-') && (i > 0) && (i+1 < host.size()) && (host[i-1] != '.') && (host[i+1] != '.')) ||
402 ((host[i] == '.') && (i > 0) && (i+1 < host.size())) )
412 bool IsValidIP(const std::string &ip)
414 if(ip.size() < 7 || ip.size() > 15)
420 for(unsigned int i = 0; i < ip.size(); i++)
422 if((dots <= 3) && (sincedot <= 3))
424 if((ip[i] >= '0') && (ip[i] <= '9'))
428 else if(ip[i] == '.')
447 virtual ~ModuleCgiIRC()
451 virtual Version GetVersion()
453 return Version("Change user's hosts connecting from known CGI:IRC hosts",VF_VENDOR);
458 MODULE_INIT(ModuleCgiIRC)