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 #include "modules/dns.h"
30 enum CGItype { PASS, IDENT, PASSFIRST, IDENTFIRST, WEBIRC };
32 // We need this method up here so that it can be accessed from anywhere
33 static void ChangeIP(User* user, const std::string& newip)
35 ServerInstance->Users->RemoveCloneCounts(user);
36 user->SetClientIP(newip.c_str());
37 ServerInstance->Users->AddClone(user);
40 /** Holds a CGI site's details
49 CGIhost(const std::string &mask, CGItype t, const std::string &spassword)
50 : hostmask(mask), type(t), password(spassword)
54 typedef std::vector<CGIhost> CGIHostlist;
58 * This is used for the webirc method of CGIIRC auth, and is (really) the best way to do these things.
59 * Syntax: WEBIRC password client hostname ip
60 * Where password is a shared key, client is the name of the "client" and version (e.g. cgiirc), hostname
61 * is the resolved host of the client issuing the command and IP is the real IP of the client.
64 * To tie in with the rest of cgiirc module, and to avoid race conditions, /webirc is only processed locally
65 * and simply sets metadata on the user, which is later decoded on full connect to give something meaningful.
67 class CommandWebirc : public Command
71 StringExtItem realhost;
75 CommandWebirc(Module* Creator)
76 : Command(Creator, "WEBIRC", 4),
77 realhost("cgiirc_realhost", Creator), realip("cgiirc_realip", Creator)
79 works_before_reg = true;
80 this->syntax = "password client hostname ip";
82 CmdResult Handle(const std::vector<std::string> ¶meters, User *user)
84 if(user->registered == REG_ALL)
87 for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
89 if(InspIRCd::Match(user->host, iter->hostmask, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(user->GetIPString(), iter->hostmask, ascii_case_insensitive_map))
91 if(iter->type == WEBIRC && parameters[0] == iter->password)
93 realhost.set(user, user->host);
94 realip.set(user, user->GetIPString());
96 // Check if we're happy with the provided hostname. If it's problematic then make sure we won't set a host later, just the IP
97 bool host_ok = (parameters[2].length() <= ServerInstance->Config->Limits.MaxHost);
98 const std::string& newhost = (host_ok ? parameters[2] : parameters[3]);
101 ServerInstance->SNO->WriteGlobalSno('w', "Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", user->nick.c_str(), user->host.c_str(), newhost.c_str(), user->host.c_str());
103 // Where the magic happens - change their IP
104 ChangeIP(user, parameters[3]);
105 // And follow this up by changing their host
106 user->host = user->dhost = newhost;
113 ServerInstance->SNO->WriteGlobalSno('w', "Connecting user %s tried to use WEBIRC, but didn't match any configured webirc blocks.", user->GetFullRealHost().c_str());
119 /** Resolver for CGI:IRC hostnames encoded in ident/GECOS
121 class CGIResolver : public DNS::Request
124 std::string theiruid;
125 LocalIntExt& waiting;
128 CGIResolver(DNS::Manager *mgr, Module* me, bool NotifyOpers, const std::string &source, LocalUser* u,
129 const std::string &ttype, LocalIntExt& ext)
130 : DNS::Request(mgr, me, source, DNS::QUERY_PTR), typ(ttype), theiruid(u->uuid),
131 waiting(ext), notify(NotifyOpers)
135 void OnLookupComplete(const DNS::Query *r) CXX11_OVERRIDE
137 /* Check the user still exists */
138 User* them = ServerInstance->FindUUID(theiruid);
139 if ((them) && (!them->quitting))
141 LocalUser* lu = IS_LOCAL(them);
145 const DNS::ResourceRecord &ans_record = r->answers[0];
146 if (ans_record.rdata.empty() || ans_record.rdata.length() > ServerInstance->Config->Limits.MaxHost)
150 ServerInstance->SNO->WriteGlobalSno('w', "Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", them->nick.c_str(), them->host.c_str(), ans_record.rdata.c_str(), typ.c_str());
152 them->host = them->dhost = ans_record.rdata;
153 them->InvalidateCache();
154 lu->CheckLines(true);
158 void OnError(const DNS::Query *r) CXX11_OVERRIDE
163 User* them = ServerInstance->FindUUID(theiruid);
164 if ((them) && (!them->quitting))
166 ServerInstance->SNO->WriteToSnoMask('w', "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());
172 User* them = ServerInstance->FindUUID(theiruid);
175 int count = waiting.get(them);
177 waiting.set(them, count - 1);
181 class ModuleCgiIRC : public Module
185 dynamic_reference<DNS::Manager> DNS;
187 static void RecheckClass(LocalUser* user)
189 user->MyClass = NULL;
194 void HandleIdentOrPass(LocalUser* user, const std::string& newip, bool was_pass)
196 cmd.realhost.set(user, user->host);
197 cmd.realip.set(user, user->GetIPString());
198 ChangeIP(user, newip);
199 user->host = user->dhost = user->GetIPString();
200 user->InvalidateCache();
203 // Don't create the resolver if the core couldn't put the user in a connect class or when dns is disabled
204 if (user->quitting || !DNS || !user->MyClass->resolvehostnames)
207 CGIResolver* r = new CGIResolver(*this->DNS, this, cmd.notify, newip, user, (was_pass ? "PASS" : "IDENT"), waiting);
210 waiting.set(user, waiting.get(user) + 1);
211 this->DNS->Process(r);
213 catch (DNS::Exception &ex)
215 int count = waiting.get(user);
217 waiting.set(user, count - 1);
220 ServerInstance->SNO->WriteToSnoMask('w', "Connecting user %s detected as using CGI:IRC (%s), but I could not resolve their hostname; %s", user->nick.c_str(), user->host.c_str(), ex.GetReason().c_str());
227 , waiting("cgiirc-delay", this)
232 void init() CXX11_OVERRIDE
234 ServerInstance->SNO->EnableSnomask('w', "CGIIRC");
237 void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
241 // Do we send an oper notice when a CGI:IRC has their host changed?
242 cmd.notify = ServerInstance->Config->ConfValue("cgiirc")->getBool("opernotice", true);
244 ConfigTagList tags = ServerInstance->Config->ConfTags("cgihost");
245 for (ConfigIter i = tags.first; i != tags.second; ++i)
247 ConfigTag* tag = i->second;
248 std::string hostmask = tag->getString("mask"); // An allowed CGI:IRC host
249 std::string type = tag->getString("type"); // What type of user-munging we do on this host.
250 std::string password = tag->getString("password");
252 if(hostmask.length())
254 if (type == "webirc" && password.empty())
256 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "m_cgiirc: Missing password in config: %s", hostmask.c_str());
263 else if (type == "ident")
265 else if (type == "passfirst")
267 else if (type == "webirc")
272 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Invalid <cgihost:type> value in config: %s, setting it to \"pass\"", type.c_str());
275 cmd.Hosts.push_back(CGIhost(hostmask, cgitype, password));
280 ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Invalid <cgihost:mask> value in config: %s", hostmask.c_str());
286 ModResult OnCheckReady(LocalUser *user) CXX11_OVERRIDE
288 if (waiting.get(user))
291 if (!cmd.realip.get(user))
292 return MOD_RES_PASSTHRU;
298 user->CheckLines(true);
302 return MOD_RES_PASSTHRU;
305 ModResult OnUserRegister(LocalUser* user) CXX11_OVERRIDE
307 for(CGIHostlist::iterator iter = cmd.Hosts.begin(); iter != cmd.Hosts.end(); iter++)
309 if(InspIRCd::Match(user->host, iter->hostmask, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(user->GetIPString(), iter->hostmask, ascii_case_insensitive_map))
312 if(iter->type == PASS)
314 CheckPass(user); // We do nothing if it fails so...
315 user->CheckLines(true);
317 else if(iter->type == PASSFIRST && !CheckPass(user))
319 // If the password lookup failed, try the ident
320 CheckIdent(user); // If this fails too, do nothing
321 user->CheckLines(true);
323 else if(iter->type == IDENT)
325 CheckIdent(user); // Nothing on failure.
326 user->CheckLines(true);
328 else if(iter->type == IDENTFIRST && !CheckIdent(user))
330 // If the ident lookup fails, try the password.
332 user->CheckLines(true);
334 else if(iter->type == WEBIRC)
336 // We don't need to do anything here
338 return MOD_RES_PASSTHRU;
341 return MOD_RES_PASSTHRU;
344 bool CheckPass(LocalUser* user)
346 if(IsValidHost(user->password))
348 HandleIdentOrPass(user, user->password, true);
349 user->password.clear();
356 bool CheckIdent(LocalUser* user)
361 if (user->ident.length() == 8)
362 ident = user->ident.c_str();
363 else if (user->ident.length() == 9 && user->ident[0] == '~')
364 ident = user->ident.c_str() + 1;
369 unsigned long ipaddr = strtoul(ident, NULL, 16);
372 newip.s_addr = htonl(ipaddr);
373 std::string newipstr(inet_ntoa(newip));
375 user->ident = "~cgiirc";
376 HandleIdentOrPass(user, newipstr, false);
381 bool IsValidHost(const std::string &host)
383 if(!host.size() || host.size() > ServerInstance->Config->Limits.MaxHost)
386 for(unsigned int i = 0; i < host.size(); i++)
388 if( ((host[i] >= '0') && (host[i] <= '9')) ||
389 ((host[i] >= 'A') && (host[i] <= 'Z')) ||
390 ((host[i] >= 'a') && (host[i] <= 'z')) ||
391 ((host[i] == '-') && (i > 0) && (i+1 < host.size()) && (host[i-1] != '.') && (host[i+1] != '.')) ||
392 ((host[i] == '.') && (i > 0) && (i+1 < host.size())) )
402 Version GetVersion() CXX11_OVERRIDE
404 return Version("Change user's hosts connecting from known CGI:IRC hosts",VF_VENDOR);
408 MODULE_INIT(ModuleCgiIRC)