1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
17 #include <sys/socket.h>
18 #include <netinet/in.h>
19 #include <arpa/inet.h>
25 /* $ModDesc: Change user's hosts connecting from known CGI:IRC hosts */
27 enum CGItype { PASS, IDENT, PASSFIRST, IDENTFIRST, WEBIRC };
30 /** Holds a CGI site's details
32 class CGIhost : public classbase
39 CGIhost(const std::string &mask = "", CGItype t = IDENTFIRST, const std::string &password ="")
40 : hostmask(mask), type(t), password(password)
44 typedef std::vector<CGIhost> CGIHostlist;
46 class cmd_webirc : public command_t
52 cmd_webirc(InspIRCd* Me, CGIHostlist &Hosts, bool notify) : command_t(Me, "WEBIRC", 0, 4, true), Hosts(Hosts), notify(notify)
54 this->source = "m_cgiirc.so";
55 this->syntax = "password client hostname ip";
57 CmdResult Handle(const char** parameters, int pcnt, userrec *user)
59 if(user->registered == REG_ALL)
62 for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
64 if(ServerInstance->MatchText(user->host, iter->hostmask) || ServerInstance->MatchText(user->GetIPString(), iter->hostmask))
66 if(iter->type == WEBIRC && parameters[0] == iter->password)
68 user->Extend("cgiirc_realhost", new std::string(user->host));
69 user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
71 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", user->nick, user->host, parameters[2], user->host);
72 user->Extend("cgiirc_webirc_hostname", new std::string(parameters[2]));
73 user->Extend("cgiirc_webirc_ip", new std::string(parameters[3]));
83 /** Resolver for CGI:IRC hostnames encoded in ident/GECOS
85 class CGIResolver : public Resolver
92 CGIResolver(Module* me, InspIRCd* ServerInstance, bool NotifyOpers, const std::string &source, bool forward, userrec* u, int userfd, const std::string &type, bool &cached)
93 : Resolver(ServerInstance, source, forward ? DNS_QUERY_A : DNS_QUERY_PTR4, cached, me), typ(type), theirfd(userfd), them(u), notify(NotifyOpers) { }
95 virtual void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
97 /* Check the user still exists */
98 if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
101 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from %s", them->nick, them->host, result.c_str(), typ.c_str());
103 strlcpy(them->host, result.c_str(), 63);
104 strlcpy(them->dhost, result.c_str(), 63);
105 strlcpy(them->ident, "~cgiirc", 8);
106 them->InvalidateCache();
110 virtual void OnError(ResolverError e, const std::string &errormessage)
112 if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
115 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but their host can't be resolved from their %s!", them->nick, them->host,typ.c_str());
119 virtual ~CGIResolver()
124 class ModuleCgiIRC : public Module
126 cmd_webirc* mycommand;
130 ModuleCgiIRC(InspIRCd* Me) : Module::Module(Me)
134 mycommand=new cmd_webirc(Me, Hosts, NotifyOpers);
135 ServerInstance->AddCommand(mycommand);
138 void Implements(char* List)
140 List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCleanup] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUserQuit] = List[I_OnUserConnect] = 1;
143 virtual Priority Prioritize()
145 // We want to get here before m_cloaking and m_hostchange etc
146 return PRIORITY_FIRST;
149 virtual void OnRehash(userrec* user, const std::string ¶meter)
151 ConfigReader Conf(ServerInstance);
153 NotifyOpers = Conf.ReadFlag("cgiirc", "opernotice", 0); // If we send an oper notice when a CGI:IRC has their host changed.
155 if(Conf.GetError() == CONF_VALUE_NOT_FOUND)
158 for(int i = 0; i < Conf.Enumerate("cgihost"); i++)
160 std::string hostmask = Conf.ReadValue("cgihost", "mask", i); // An allowed CGI:IRC host
161 std::string type = Conf.ReadValue("cgihost", "type", i); // What type of user-munging we do on this host.
162 std::string password = Conf.ReadValue("cgihost", "password", i);
164 if(hostmask.length())
166 Hosts.push_back(CGIhost(hostmask));
169 Hosts.back().type = PASS;
170 else if(type == "ident")
171 Hosts.back().type = IDENT;
172 else if(type == "passfirst")
173 Hosts.back().type = PASSFIRST;
174 else if(type == "webirc") {
175 Hosts.back().type = WEBIRC;
176 if(password.length())
177 Hosts.back().password=password;
179 ServerInstance->Log(DEFAULT, "m_cgiirc: Missing password in config: %s", hostmask.c_str());
184 ServerInstance->Log(DEFAULT, "m_cgiirc.so: Invalid <cgihost:mask> value in config: %s", hostmask.c_str());
190 virtual void OnCleanup(int target_type, void* item)
192 if(target_type == TYPE_USER)
194 userrec* user = (userrec*)item;
195 std::string* realhost;
198 if(user->GetExt("cgiirc_realhost", realhost))
201 user->Shrink("cgiirc_realhost");
204 if(user->GetExt("cgiirc_realip", realip))
207 user->Shrink("cgiirc_realip");
212 virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
214 if((extname == "cgiirc_realhost") || (extname == "cgiirc_realip"))
218 if(user->GetExt(extname, data))
220 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *data);
225 virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
227 if(target_type == TYPE_USER)
229 userrec* dest = (userrec*)target;
231 if(((extname == "cgiirc_realhost") || (extname == "cgiirc_realip")) && (!dest->GetExt(extname, bleh)))
233 dest->Extend(extname, new std::string(extdata));
238 virtual void OnUserQuit(userrec* user, const std::string &message, const std::string &oper_message)
240 OnCleanup(TYPE_USER, user);
244 virtual int OnUserRegister(userrec* user)
246 for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
248 if(ServerInstance->MatchText(user->host, iter->hostmask) || ServerInstance->MatchText(user->GetIPString(), iter->hostmask))
251 if(iter->type == PASS)
253 CheckPass(user); // We do nothing if it fails so...
255 else if(iter->type == PASSFIRST && !CheckPass(user))
257 // If the password lookup failed, try the ident
258 CheckIdent(user); // If this fails too, do nothing
260 else if(iter->type == IDENT)
262 CheckIdent(user); // Nothing on failure.
264 else if(iter->type == IDENTFIRST && !CheckIdent(user))
266 // If the ident lookup fails, try the password.
269 else if(iter->type == WEBIRC)
271 // We don't need to do anything here
279 virtual void OnUserConnect(userrec* user)
281 std::string *webirc_hostname, *webirc_ip;
282 if(user->GetExt("cgiirc_webirc_hostname", webirc_hostname))
284 strlcpy(user->host,webirc_hostname->c_str(),63);
285 strlcpy(user->dhost,webirc_hostname->c_str(),63);
286 delete webirc_hostname;
287 user->InvalidateCache();
288 user->Shrink("cgiirc_webirc_hostname");
290 if(user->GetExt("cgiirc_webirc_ip", webirc_ip))
294 valid = (inet_pton(AF_INET6, webirc_ip->c_str(), &((sockaddr_in6*)user->ip)->sin6_addr) > 0);
297 valid = (inet_aton(webirc_ip->c_str(), &((sockaddr_in*)user->ip)->sin_addr));
299 if (inet_aton(webirc_ip->c_str(), &((sockaddr_in*)user->ip)->sin_addr))
304 user->InvalidateCache();
305 user->Shrink("cgiirc_webirc_ip");
309 bool CheckPass(userrec* user)
311 if(IsValidHost(user->password))
313 user->Extend("cgiirc_realhost", new std::string(user->host));
314 user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
315 strlcpy(user->host, user->password, 64);
316 strlcpy(user->dhost, user->password, 64);
317 user->InvalidateCache();
321 if (user->GetProtocolFamily() == AF_INET6)
322 valid = (inet_pton(AF_INET6, user->password, &((sockaddr_in6*)user->ip)->sin6_addr) > 0);
324 valid = (inet_aton(user->password, &((sockaddr_in*)user->ip)->sin_addr));
326 if (inet_aton(user->password, &((sockaddr_in*)user->ip)->sin_addr))
331 /* We were given a IP in the password, we don't do DNS so they get this is as their host as well. */
333 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);
337 /* We got as resolved hostname in the password. */
342 CGIResolver* r = new CGIResolver(this, ServerInstance, NotifyOpers, user->password, false, user, user->GetFd(), "PASS", cached);
343 ServerInstance->AddResolver(r, cached);
345 catch (ModuleException& e)
348 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
355 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);*/
363 bool CheckIdent(userrec* user)
368 int len = strlen(user->ident);
372 else if(len == 9 && *user->ident == '~')
373 ident = user->ident+1;
377 for(int i = 0; i < 4; i++)
378 if(!HexToInt(ip[i], ident + i*2))
381 snprintf(newip, 16, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
383 user->Extend("cgiirc_realhost", new std::string(user->host));
384 user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
386 if (user->GetProtocolFamily() == AF_INET6)
387 inet_pton(AF_INET6, newip, &((sockaddr_in6*)user->ip)->sin6_addr);
389 inet_aton(newip, &((sockaddr_in*)user->ip)->sin_addr);
391 inet_aton(newip, &((sockaddr_in*)user->ip)->sin_addr);
396 strlcpy(user->host, newip, 16);
397 strlcpy(user->dhost, newip, 16);
398 strlcpy(user->ident, "~cgiirc", 8);
401 CGIResolver* r = new CGIResolver(this, ServerInstance, NotifyOpers, newip, false, user, user->GetFd(), "IDENT", cached);
402 ServerInstance->AddResolver(r, cached);
404 catch (ModuleException& e)
406 strlcpy(user->host, newip, 16);
407 strlcpy(user->dhost, newip, 16);
408 strlcpy(user->ident, "~cgiirc", 8);
409 user->InvalidateCache();
412 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
414 /*strlcpy(user->host, newip, 16);
415 strlcpy(user->dhost, newip, 16);
416 strlcpy(user->ident, "~cgiirc", 8);*/
421 bool IsValidHost(const std::string &host)
426 for(unsigned int i = 0; i < host.size(); i++)
428 if( ((host[i] >= '0') && (host[i] <= '9')) ||
429 ((host[i] >= 'A') && (host[i] <= 'Z')) ||
430 ((host[i] >= 'a') && (host[i] <= 'z')) ||
431 ((host[i] == '-') && (i > 0) && (i+1 < host.size()) && (host[i-1] != '.') && (host[i+1] != '.')) ||
432 ((host[i] == '.') && (i > 0) && (i+1 < host.size())) )
442 bool IsValidIP(const std::string &ip)
444 if(ip.size() < 7 || ip.size() > 15)
450 for(unsigned int i = 0; i < ip.size(); i++)
452 if((dots <= 3) && (sincedot <= 3))
454 if((ip[i] >= '0') && (ip[i] <= '9'))
458 else if(ip[i] == '.')
477 bool HexToInt(int &out, const char* in)
483 out = strtol(ip, NULL, 16);
485 if(out > 255 || out < 0)
491 virtual ~ModuleCgiIRC()
495 virtual Version GetVersion()
497 return Version(1,1,0,0,VF_VENDOR,API_VERSION);
502 class ModuleCgiIRCFactory : public ModuleFactory
505 ModuleCgiIRCFactory()
509 ~ModuleCgiIRCFactory()
513 virtual Module * CreateModule(InspIRCd* Me)
515 return new ModuleCgiIRC(Me);
521 extern "C" void * init_module( void )
523 return new ModuleCgiIRCFactory;