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 * ---------------------------------------------------
16 /* $ModDesc: Provides support for RFC 1413 ident lookups */
18 // Version 1.5.0.0 - Updated to use InspSocket, faster and neater.
20 /** Handles RFC1413 ident connections to users
22 class RFC1413 : public InspSocket
25 socklen_t uslen; // length of our port number
26 socklen_t themlen; // length of their port number
27 char ident_request[128]; // buffer used to make up the request string
30 userrec* u; // user record that the lookup is associated with
33 RFC1413(InspIRCd* SI, userrec* user, int maxtime, const std::string &bindto) : InspSocket(SI, user->GetIPString(), 113, false, maxtime, bindto), u(user)
38 virtual void OnTimeout()
40 // When we timeout, the connection failed within the allowed timeframe,
41 // so we just display a notice, and tidy off the ident_data.
42 if (u && (Instance->SE->GetRef(ufd) == u))
44 u->Shrink("ident_data");
45 Instance->next_call = Instance->Time();
49 virtual bool OnDataReady()
51 char* ibuf = this->Read();
55 char* section = strtok_r(ibuf,":",&savept);
58 if (strstr(section,"USERID"))
60 section = strtok_r(NULL,":",&savept);
63 // ID type, usually UNIX or OTHER... we dont want it, so read the next token
64 section = strtok_r(NULL,":",&savept);
67 while (*section == ' ') section++; // strip leading spaces
68 for (char* j = section; *j; j++)
69 if ((*j < 33) || (*j > 126))
70 *j = '\0'; // truncate at invalid chars
73 if (u && (Instance->SE->GetRef(ufd) == u))
75 if (this->Instance->IsIdent(section))
77 u->Extend("IDENT", new std::string(std::string(section) + "," + std::string(u->ident)));
78 strlcpy(u->ident,section,IDENTMAX);
79 u->WriteServ("NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
87 section = strtok_r(NULL,":",&savept);
93 virtual void OnClose()
95 // tidy up after ourselves when the connection is done.
96 // We receive this event straight after a timeout, too.
99 // OK, now listen up. The weird looking check here is
100 // REQUIRED. Don't try and optimize it away.
102 // When a socket is closed, it is not immediately removed
103 // from the socket list, there can be a short delay
104 // before it is culled from the list. This means that
105 // without this check, there is a chance that a user
106 // may not exist when we come to ::Shrink them, which
107 // results in a segfault. The value of "u" may not
108 // always be NULL at this point, so, what we do is
109 // check against the fd_ref_table, to see if (1) the user
110 // exists, and (2) its the SAME user, on the same file
111 // descriptor that they were when the lookup began.
113 // Fixes issue reported by webs, 7 Jun 2006
114 if (u && (Instance->SE->GetRef(ufd) == u))
116 Instance->next_call = Instance->Time();
117 u->Shrink("ident_data");
121 virtual void OnError(InspSocketError e)
123 if (u && (Instance->SE->GetRef(ufd) == u))
125 if (*u->ident == '~')
126 u->WriteServ("NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
128 Instance->next_call = Instance->Time();
129 u->Shrink("ident_data");
133 virtual bool OnConnected()
135 if (u && (Instance->SE->GetRef(ufd) == u))
137 sockaddr* sock_us = new sockaddr[2];
138 sockaddr* sock_them = new sockaddr[2];
139 bool success = false;
140 uslen = sizeof(sockaddr_in);
141 themlen = sizeof(sockaddr_in);
143 if (this->u->GetProtocolFamily() == AF_INET6)
145 themlen = sizeof(sockaddr_in6);
146 uslen = sizeof(sockaddr_in6);
149 success = ((getsockname(this->u->GetFd(),sock_us,&uslen) || getpeername(this->u->GetFd(), sock_them, &themlen)));
158 // send the request in the following format: theirsocket,oursocket
160 if (this->u->GetProtocolFamily() == AF_INET6)
161 snprintf(ident_request,127,"%d,%d\r\n",ntohs(((sockaddr_in6*)sock_them)->sin6_port),ntohs(((sockaddr_in6*)sock_us)->sin6_port));
164 snprintf(ident_request,127,"%d,%d\r\n",ntohs(((sockaddr_in*)sock_them)->sin_port),ntohs(((sockaddr_in*)sock_us)->sin_port));
165 this->Write(ident_request);
173 Instance->next_call = Instance->Time();
179 class ModuleIdent : public Module
184 std::string PortBind;
189 Conf = new ConfigReader(ServerInstance);
190 IdentTimeout = Conf->ReadInteger("ident", "timeout", 0, true);
191 PortBind = Conf->ReadValue("ident", "bind", 0);
197 ModuleIdent(InspIRCd* Me)
204 void Implements(char* List)
206 List[I_OnCleanup] = List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
209 void OnSyncUserMetaData(userrec* user, Module* proto,void* opaque, const std::string &extname, bool displayable)
211 if ((displayable) && (extname == "IDENT"))
214 if (GetExt("IDENT", ident))
215 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *ident);
220 virtual void OnRehash(userrec* user, const std::string ¶meter)
225 virtual int OnUserRegister(userrec* user)
228 * when the new user connects, before they authenticate with USER/NICK/PASS, we do
229 * their ident lookup. We do this by instantiating an object of type RFC1413, which
230 * is derived from InspSocket, and inserting it into the socket engine using the
231 * Server::AddSocket() call.
233 char newident[MAXBUF];
234 strcpy(newident,"~");
235 strlcat(newident,user->ident,IDENTMAX);
236 strlcpy(user->ident,newident,IDENTMAX);
239 user->WriteServ("NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
240 RFC1413* ident = new RFC1413(ServerInstance, user, IdentTimeout, PortBind);
241 if ((ident->GetState() == I_CONNECTING) || (ident->GetState() == I_CONNECTED))
243 user->Extend("ident_data", (char*)ident);
247 user->WriteServ("NOTICE "+std::string(user->nick)+" :*** Could not find your ident, using "+std::string(user->ident)+" instead.");
248 ServerInstance->next_call = ServerInstance->Time();
253 virtual bool OnCheckReady(userrec* user)
256 * The socket engine will clean up their ident request for us when it completes,
257 * either due to timeout or due to closing, so, we just hold them until they dont
258 * have an ident field any more.
261 return (!user->GetExt("ident_data", ident));
264 virtual void OnCleanup(int target_type, void* item)
266 if (target_type == TYPE_USER)
268 userrec* user = (userrec*)item;
270 std::string* identstr;
271 if (user->GetExt("ident_data", ident))
273 // FIX: If the user record is deleted, the socket wont be removed
274 // immediately so there is chance of the socket trying to write to
275 // a user which has now vanished! To prevent this, set ident::u
276 // to NULL and check it so that we dont write users who have gone away.
278 ServerInstance->SE->DelFd(ident);
280 if (user->GetExt("IDENT", identstr))
287 virtual void OnUserDisconnect(userrec* user)
290 * when the user quits tidy up any ident lookup they have pending to keep things tidy.
291 * When we call RemoveSocket, the abstractions tied into the system evnetually work their
292 * way to RFC1459::OnClose(), which shrinks off the ident_data for us, so we dont need
293 * to do it here. If we don't tidy this up, there may still be lingering idents for users
294 * who have quit, as class RFC1459 is only loosely bound to userrec* via a pair of pointers
295 * and this would leave at least one of the invalid ;)
298 std::string* identstr;
299 if (user->GetExt("ident_data", ident))
302 ServerInstance->SE->DelFd(ident);
304 if (user->GetExt("IDENT", identstr))
310 virtual ~ModuleIdent()
312 ServerInstance->next_call = ServerInstance->Time();
315 virtual Version GetVersion()
317 return Version(1,1,0,0,VF_VENDOR,API_VERSION);
322 MODULE_INIT(ModuleIdent)