1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
11 * Written by Craig Edwards, Craig McLure, and others.
12 * This program is free but copyrighted software; see
13 * the file COPYING for details.
15 * ---------------------------------------------------
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <arpa/inet.h>
30 /* $ModDesc: Change user's hosts connecting from known CGI:IRC hosts */
34 enum CGItype { PASS, IDENT, PASSFIRST, IDENTFIRST };
36 class CGIhost : public classbase
42 CGIhost(const std::string &mask = "", CGItype t = IDENTFIRST)
43 : hostmask(mask), type(t)
48 typedef std::vector<CGIhost> CGIHostlist;
50 class CGIResolver : public Resolver
57 CGIResolver(bool NotifyOpers, const std::string &source, bool forward, userrec* u, int userfd, const std::string &type)
58 : Resolver(ServerInstance, source, forward ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), typ(type), theirfd(userfd), them(u), notify(NotifyOpers) { }
60 virtual void OnLookupComplete(const std::string &result)
62 /* Check the user still exists */
63 if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
66 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());
68 strlcpy(them->host, result.c_str(), 63);
69 strlcpy(them->dhost, result.c_str(), 63);
70 strlcpy(them->ident, "~cgiirc", 8);
74 virtual void OnError(ResolverError e, const std::string &errormessage)
76 if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
79 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());
83 virtual ~CGIResolver()
88 class ModuleCgiIRC : public Module
94 ModuleCgiIRC(InspIRCd* Me) : Module::Module(Me)
100 void Implements(char* List)
102 List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCleanup] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUserQuit] = 1;
105 virtual Priority Prioritize()
107 // We want to get here before m_cloaking and m_hostchange etc
108 return PRIORITY_FIRST;
111 virtual void OnRehash(const std::string ¶meter)
113 ConfigReader Conf(ServerInstance);
115 NotifyOpers = Conf.ReadFlag("cgiirc", "opernotice", 0); // If we send an oper notice when a CGI:IRC has their host changed.
117 if(Conf.GetError() == CONF_VALUE_NOT_FOUND)
120 for(int i = 0; i < Conf.Enumerate("cgihost"); i++)
122 std::string hostmask = Conf.ReadValue("cgihost", "mask", i); // An allowed CGI:IRC host
123 std::string type = Conf.ReadValue("cgihost", "type", i); // What type of user-munging we do on this host.
125 if(hostmask.length())
127 Hosts.push_back(CGIhost(hostmask));
130 Hosts.back().type = PASS;
131 else if(type == "ident")
132 Hosts.back().type = IDENT;
133 else if(type == "passfirst")
134 Hosts.back().type = PASSFIRST;
138 ServerInstance->Log(DEBUG, "m_cgiirc.so: Invalid <cgihost:mask> value in config: %s", hostmask.c_str());
144 virtual void OnCleanup(int target_type, void* item)
146 if(target_type == TYPE_USER)
148 userrec* user = (userrec*)item;
149 std::string* realhost;
152 if(user->GetExt("cgiirc_realhost", realhost))
155 user->Shrink("cgiirc_realhost");
158 if(user->GetExt("cgiirc_realip", realip))
161 user->Shrink("cgiirc_realip");
166 virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
168 if((extname == "cgiirc_realhost") || (extname == "cgiirc_realip"))
172 if(user->GetExt(extname, data))
174 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *data);
179 virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
181 if(target_type == TYPE_USER)
183 userrec* dest = (userrec*)target;
185 if(((extname == "cgiirc_realhost") || (extname == "cgiirc_realip")) && (!dest->GetExt(extname, bleh)))
187 dest->Extend(extname, new std::string(extdata));
192 virtual void OnUserQuit(userrec* user, const std::string &message)
194 OnCleanup(TYPE_USER, user);
198 virtual void OnUserRegister(userrec* user)
200 ServerInstance->Log(DEBUG, "m_cgiirc.so: User %s registering, %s %s", user->nick,user->host,user->GetIPString());
202 for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
204 ServerInstance->Log(DEBUG, "m_cgiirc.so: Matching %s against (%s or %s)", iter->hostmask.c_str(), user->host, user->GetIPString());
206 if(ServerInstance->MatchText(user->host, iter->hostmask) || ServerInstance->MatchText(user->GetIPString(), iter->hostmask))
209 ServerInstance->Log(DEBUG, "m_cgiirc.so: Handling CGI:IRC user: %s (%s) matched %s", user->GetFullRealHost(), user->GetIPString(), iter->hostmask.c_str());
211 if(iter->type == PASS)
213 CheckPass(user); // We do nothing if it fails so...
215 else if(iter->type == PASSFIRST && !CheckPass(user))
217 // If the password lookup failed, try the ident
218 CheckIdent(user); // If this fails too, do nothing
220 else if(iter->type == IDENT)
222 CheckIdent(user); // Nothing on failure.
224 else if(iter->type == IDENTFIRST && !CheckIdent(user))
226 // If the ident lookup fails, try the password.
235 bool CheckPass(userrec* user)
237 ServerInstance->Log(DEBUG, "m_cgiirc.so: CheckPass(%s) - %s", user->nick, user->password);
239 if(IsValidHost(user->password))
241 user->Extend("cgiirc_realhost", new std::string(user->host));
242 user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
243 strlcpy(user->host, user->password, 64);
244 strlcpy(user->dhost, user->password, 64);
247 if (insp_aton(user->password, (insp_inaddr*)&((sockaddr_in6*)&user->ip)->sin6_addr))
249 if (insp_aton(user->password, (insp_inaddr*)&((sockaddr_in*)&user->ip)->sin_addr))
252 /* We were given a IP in the password, we don't do DNS so they get this is as their host as well. */
253 ServerInstance->Log(DEBUG, "m_cgiirc.so: Got an IP in the user's password");
256 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);
260 /* We got as resolved hostname in the password. */
261 ServerInstance->Log(DEBUG, "m_cgiirc.so: Got a hostname in the user's password");
265 CGIResolver* r = new CGIResolver(NotifyOpers, user->password, false, user, user->GetFd(), "PASS");
266 ServerInstance->AddResolver(r);
268 catch (ModuleException& e)
271 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
278 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);*/
284 ServerInstance->Log(DEBUG, "m_cgiirc.so: User's password was not a valid host");
290 bool CheckIdent(userrec* user)
295 int len = strlen(user->ident);
299 else if(len == 9 && *user->ident == '~')
300 ident = user->ident+1;
304 for(int i = 0; i < 4; i++)
305 if(!HexToInt(ip[i], ident + i*2))
308 snprintf(newip, 16, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
310 user->Extend("cgiirc_realhost", new std::string(user->host));
311 user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
313 insp_aton(newip, (insp_inaddr*)&((sockaddr_in6*)&user->ip)->sin6_addr);
315 insp_aton(newip, (insp_inaddr*)&((sockaddr_in*)&user->ip)->sin_addr);
320 ServerInstance->Log(DEBUG,"MAKE RESOLVER: %s %d %s",newip, user->GetFd(), "IDENT");
321 CGIResolver* r = new CGIResolver(NotifyOpers, newip, false, user, user->GetFd(), "IDENT");
322 ServerInstance->AddResolver(r);
324 catch (ModuleException& e)
326 strlcpy(user->host, newip, 16);
327 strlcpy(user->dhost, newip, 16);
328 strlcpy(user->ident, "~cgiirc", 8);
331 ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
333 /*strlcpy(user->host, newip, 16);
334 strlcpy(user->dhost, newip, 16);
335 strlcpy(user->ident, "~cgiirc", 8);*/
340 bool IsValidHost(const std::string &host)
345 for(unsigned int i = 0; i < host.size(); i++)
347 if( ((host[i] >= '0') && (host[i] <= '9')) ||
348 ((host[i] >= 'A') && (host[i] <= 'Z')) ||
349 ((host[i] >= 'a') && (host[i] <= 'z')) ||
350 ((host[i] == '-') && (i > 0) && (i+1 < host.size()) && (host[i-1] != '.') && (host[i+1] != '.')) ||
351 ((host[i] == '.') && (i > 0) && (i+1 < host.size())) )
361 bool IsValidIP(const std::string &ip)
363 if(ip.size() < 7 || ip.size() > 15)
369 for(unsigned int i = 0; i < ip.size(); i++)
371 if((dots <= 3) && (sincedot <= 3))
373 if((ip[i] >= '0') && (ip[i] <= '9'))
377 else if(ip[i] == '.')
396 bool HexToInt(int &out, const char* in)
402 out = strtol(ip, NULL, 16);
404 if(out > 255 || out < 0)
410 virtual ~ModuleCgiIRC()
414 virtual Version GetVersion()
416 return Version(1,0,0,0,VF_VENDOR);
421 class ModuleCgiIRCFactory : public ModuleFactory
424 ModuleCgiIRCFactory()
428 ~ModuleCgiIRCFactory()
432 virtual Module * CreateModule(InspIRCd* Me)
434 return new ModuleCgiIRC(Me);
440 extern "C" void * init_module( void )
442 return new ModuleCgiIRCFactory;