1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
26 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
28 /* $ModDesc: Provides support for RFC 1413 ident lookups */
30 // Version 1.5.0.0 - Updated to use InspSocket, faster and neater.
32 class RFC1413 : public InspSocket
35 Server* Srv; // Server* class used for core communications
36 sockaddr_in sock_us; // our port number
37 sockaddr_in sock_them; // their port number
38 socklen_t uslen; // length of our port number
39 socklen_t themlen; // length of their port number
40 char ident_request[128]; // buffer used to make up the request string
43 userrec* u; // user record that the lookup is associated with
46 RFC1413(userrec* user, int maxtime, Server* S) : InspSocket((char*)inet_ntoa(user->ip4), 113, false, maxtime), Srv(S), u(user), ufd(user->fd)
48 Srv->Log(DEBUG,"Ident: associated.");
51 virtual void OnTimeout()
53 // When we timeout, the connection failed within the allowed timeframe,
54 // so we just display a notice, and tidy off the ident_data.
55 if (u && (fd_ref_table[ufd] == u))
57 u->Shrink("ident_data");
58 Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
62 virtual bool OnDataReady()
64 char* ibuf = this->Read();
68 char* section = strtok_r(ibuf,":",&savept);
71 if (strstr(section,"USERID"))
73 section = strtok_r(NULL,":",&savept);
76 // ID type, usually UNIX or OTHER... we dont want it, so read the next token
77 section = strtok_r(NULL,":",&savept);
80 while (*section == ' ') section++; // strip leading spaces
81 for (char* j = section; *j; j++)
82 if ((*j < 33) || (*j > 126))
83 *j = '\0'; // truncate at invalid chars
86 if (u && (fd_ref_table[ufd] == u))
88 strlcpy(u->ident,section,IDENTMAX);
89 Srv->Log(DEBUG,"IDENT SET: "+std::string(u->ident));
90 Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
97 section = strtok_r(NULL,":",&savept);
103 virtual void OnClose()
105 // tidy up after ourselves when the connection is done.
106 // We receive this event straight after a timeout, too.
109 // OK, now listen up. The weird looking check here is
110 // REQUIRED. Don't try and optimize it away.
112 // When a socket is closed, it is not immediately removed
113 // from the socket list, there can be a short delay
114 // before it is culled from the list. This means that
115 // without this check, there is a chance that a user
116 // may not exist when we come to ::Shrink them, which
117 // results in a segfault. The value of "u" may not
118 // always be NULL at this point, so, what we do is
119 // check against the fd_ref_table, to see if (1) the user
120 // exists, and (2) its the SAME user, on the same file
121 // descriptor that they were when the lookup began.
123 // Fixes issue reported by webs, 7 Jun 2006
124 if (u && (fd_ref_table[ufd] == u))
126 u->Shrink("ident_data");
130 virtual void OnError(InspSocketError e)
132 if (u && (fd_ref_table[ufd] == u))
134 u->Shrink("ident_data");
138 virtual bool OnConnected()
140 if (u && (fd_ref_table[ufd] == u))
142 uslen = sizeof(sock_us);
143 themlen = sizeof(sock_them);
144 if ((getsockname(this->u->fd,(sockaddr*)&sock_us,&uslen) || getpeername(this->u->fd, (sockaddr*)&sock_them, &themlen)))
146 Srv->Log(DEBUG,"Ident: failed to get socket names, bailing");
151 // send the request in the following format: theirsocket,oursocket
152 snprintf(ident_request,127,"%d,%d\r\n",ntohs(sock_them.sin_port),ntohs(sock_us.sin_port));
153 this->Write(ident_request);
154 Srv->Log(DEBUG,"Sent ident request, waiting for reply");
165 class ModuleIdent : public Module
175 Conf = new ConfigReader;
176 IdentTimeout = Conf->ReadInteger("ident","timeout",0,true);
182 ModuleIdent(Server* Me)
189 void Implements(char* List)
191 List[I_OnCleanup] = List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
194 virtual void OnRehash(const std::string ¶meter)
199 virtual void OnUserRegister(userrec* user)
202 * when the new user connects, before they authenticate with USER/NICK/PASS, we do
203 * their ident lookup. We do this by instantiating an object of type RFC1413, which
204 * is derived from InspSocket, and inserting it into the socket engine using the
205 * Server::AddSocket() call.
207 Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
208 RFC1413* ident = new RFC1413(user, IdentTimeout, Srv);
209 if (ident->GetState() != I_ERROR)
211 user->Extend("ident_data", (char*)ident);
212 Srv->AddSocket(ident);
216 Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Could not find your ident, using "+std::string(user->ident)+" instead.");
221 virtual bool OnCheckReady(userrec* user)
224 * The socket engine will clean up their ident request for us when it completes,
225 * either due to timeout or due to closing, so, we just hold them until they dont
226 * have an ident field any more.
228 RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
232 virtual void OnCleanup(int target_type, void* item)
234 if (target_type == TYPE_USER)
236 userrec* user = (userrec*)item;
237 RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
240 // FIX: If the user record is deleted, the socket wont be removed
241 // immediately so there is chance of the socket trying to write to
242 // a user which has now vanished! To prevent this, set ident::u
243 // to NULL and check it so that we dont write users who have gone away.
245 Srv->RemoveSocket(ident);
250 virtual void OnUserDisconnect(userrec* user)
253 * when the user quits tidy up any ident lookup they have pending to keep things tidy.
254 * When we call RemoveSocket, the abstractions tied into the system evnetually work their
255 * way to RFC1459::OnClose(), which shrinks off the ident_data for us, so we dont need
256 * to do it here. If we don't tidy this up, there may still be lingering idents for users
257 * who have quit, as class RFC1459 is only loosely bound to userrec* via a pair of pointers
258 * and this would leave at least one of the invalid ;)
260 RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
264 Srv->RemoveSocket(ident);
268 virtual ~ModuleIdent()
272 virtual Version GetVersion()
274 return Version(1,5,0,0,VF_VENDOR);
279 class ModuleIdentFactory : public ModuleFactory
286 ~ModuleIdentFactory()
290 virtual Module * CreateModule(Server* Me)
292 return new ModuleIdent(Me);
298 extern "C" void * init_module( void )
300 return new ModuleIdentFactory;