* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
+ * InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
-#include <stdio.h>
-#include <string>
+#include "inspircd.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
/* $ModDesc: Provides support for RFC 1413 ident lookups */
-Server *Srv;
-
+// Version 1.5.0.0 - Updated to use InspSocket, faster and neater.
+
+/** Handles RFC1413 ident connections to users
+ */
+class RFC1413 : public InspSocket
+{
+ protected:
+ socklen_t uslen; // length of our port number
+ socklen_t themlen; // length of their port number
+ char ident_request[128]; // buffer used to make up the request string
+ public:
+
+ userrec* u; // user record that the lookup is associated with
+ int ufd;
+
+ RFC1413(InspIRCd* SI, userrec* user, int maxtime, const std::string &bindto) : InspSocket(SI, user->GetIPString(), 113, false, maxtime, bindto), u(user)
+ {
+ ufd = user->GetFd();
+ }
+
+ virtual void OnTimeout()
+ {
+ // When we timeout, the connection failed within the allowed timeframe,
+ // so we just display a notice, and tidy off the ident_data.
+ if (u && (Instance->SE->GetRef(ufd) == u))
+ {
+ u->Shrink("ident_data");
+ Instance->next_call = Instance->Time();
+ }
+ }
+
+ virtual bool OnDataReady()
+ {
+ char* ibuf = this->Read();
+ if (ibuf)
+ {
+ char* savept;
+ char* section = strtok_r(ibuf,":",&savept);
+ while (section)
+ {
+ if (strstr(section,"USERID"))
+ {
+ section = strtok_r(NULL,":",&savept);
+ if (section)
+ {
+ // ID type, usually UNIX or OTHER... we dont want it, so read the next token
+ section = strtok_r(NULL,":",&savept);
+ if (section)
+ {
+ while (*section == ' ') section++; // strip leading spaces
+ for (char* j = section; *j; j++)
+ if ((*j < 33) || (*j > 126))
+ *j = '\0'; // truncate at invalid chars
+ if (*section)
+ {
+ if (u && (Instance->SE->GetRef(ufd) == u))
+ {
+ if (this->Instance->IsIdent(section))
+ {
+ u->Extend("IDENT", new std::string(std::string(section) + "," + std::string(u->ident)));
+ strlcpy(u->ident,section,IDENTMAX);
+ u->WriteServ("NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
+ }
+ }
+ }
+ return false;
+ }
+ }
+ }
+ section = strtok_r(NULL,":",&savept);
+ }
+ }
+ return false;
+ }
+
+ virtual void OnClose()
+ {
+ // tidy up after ourselves when the connection is done.
+ // We receive this event straight after a timeout, too.
+ //
+ //
+ // OK, now listen up. The weird looking check here is
+ // REQUIRED. Don't try and optimize it away.
+ //
+ // When a socket is closed, it is not immediately removed
+ // from the socket list, there can be a short delay
+ // before it is culled from the list. This means that
+ // without this check, there is a chance that a user
+ // may not exist when we come to ::Shrink them, which
+ // results in a segfault. The value of "u" may not
+ // always be NULL at this point, so, what we do is
+ // check against the fd_ref_table, to see if (1) the user
+ // exists, and (2) its the SAME user, on the same file
+ // descriptor that they were when the lookup began.
+ //
+ // Fixes issue reported by webs, 7 Jun 2006
+ if (u && (Instance->SE->GetRef(ufd) == u))
+ {
+ Instance->next_call = Instance->Time();
+ u->Shrink("ident_data");
+ }
+ }
+
+ virtual void OnError(InspSocketError e)
+ {
+ if (u && (Instance->SE->GetRef(ufd) == u))
+ {
+ if (*u->ident == '~')
+ u->WriteServ("NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
+
+ Instance->next_call = Instance->Time();
+ u->Shrink("ident_data");
+ }
+ }
+
+ virtual bool OnConnected()
+ {
+ if (u && (Instance->SE->GetRef(ufd) == u))
+ {
+ sockaddr* sock_us = new sockaddr[2];
+ sockaddr* sock_them = new sockaddr[2];
+ bool success = false;
+ uslen = sizeof(sockaddr_in);
+ themlen = sizeof(sockaddr_in);
+#ifdef IPV6
+ if (this->u->GetProtocolFamily() == AF_INET6)
+ {
+ themlen = sizeof(sockaddr_in6);
+ uslen = sizeof(sockaddr_in6);
+ }
+#endif
+ success = ((getsockname(this->u->GetFd(),sock_us,&uslen) || getpeername(this->u->GetFd(), sock_them, &themlen)));
+ if (success)
+ {
+ delete[] sock_us;
+ delete[] sock_them;
+ return false;
+ }
+ else
+ {
+ // send the request in the following format: theirsocket,oursocket
+#ifdef IPV6
+ if (this->u->GetProtocolFamily() == AF_INET6)
+ snprintf(ident_request,127,"%d,%d\r\n",ntohs(((sockaddr_in6*)sock_them)->sin6_port),ntohs(((sockaddr_in6*)sock_us)->sin6_port));
+ else
+#endif
+ snprintf(ident_request,127,"%d,%d\r\n",ntohs(((sockaddr_in*)sock_them)->sin_port),ntohs(((sockaddr_in*)sock_us)->sin_port));
+ this->Write(ident_request);
+ delete[] sock_us;
+ delete[] sock_them;
+ return true;
+ }
+ }
+ else
+ {
+ Instance->next_call = Instance->Time();
+ return true;
+ }
+ }
+};
+
class ModuleIdent : public Module
{
+
+ ConfigReader* Conf;
+ int IdentTimeout;
+ std::string PortBind;
+
public:
- ModuleIdent()
+ void ReadSettings()
{
- Srv = new Server;
+ Conf = new ConfigReader(ServerInstance);
+ IdentTimeout = Conf->ReadInteger("ident", "timeout", 0, true);
+ PortBind = Conf->ReadValue("ident", "bind", 0);
+ if (!IdentTimeout)
+ IdentTimeout = 1;
+ DELETE(Conf);
}
- virtual void OnUserRegister(userrec* user)
+ ModuleIdent(InspIRCd* Me)
+ : Module(Me)
{
+
+ ReadSettings();
+ }
+
+ void Implements(char* List)
+ {
+ List[I_OnCleanup] = List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
+ }
+
+ void OnSyncUserMetaData(userrec* user, Module* proto,void* opaque, const std::string &extname, bool displayable)
+ {
+ if ((displayable) && (extname == "IDENT"))
+ {
+ std::string* ident;
+ if (GetExt("IDENT", ident))
+ proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *ident);
+ }
+ }
+
+
+ virtual void OnRehash(userrec* user, const std::string ¶meter)
+ {
+ ReadSettings();
+ }
+
+ virtual int OnUserRegister(userrec* user)
+ {
+ /*
+ * when the new user connects, before they authenticate with USER/NICK/PASS, we do
+ * their ident lookup. We do this by instantiating an object of type RFC1413, which
+ * is derived from InspSocket, and inserting it into the socket engine using the
+ * Server::AddSocket() call.
+ */
+ char newident[MAXBUF];
+ strcpy(newident,"~");
+ strlcat(newident,user->ident,IDENTMAX);
+ strlcpy(user->ident,newident,IDENTMAX);
+
+
+ user->WriteServ("NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
+ RFC1413* ident = new RFC1413(ServerInstance, user, IdentTimeout, PortBind);
+ if ((ident->GetState() == I_CONNECTING) || (ident->GetState() == I_CONNECTED))
+ {
+ user->Extend("ident_data", (char*)ident);
+ }
+ else
+ {
+ user->WriteServ("NOTICE "+std::string(user->nick)+" :*** Could not find your ident, using "+std::string(user->ident)+" instead.");
+ ServerInstance->next_call = ServerInstance->Time();
+ }
+ return 0;
+ }
+
+ virtual bool OnCheckReady(userrec* user)
+ {
+ /*
+ * The socket engine will clean up their ident request for us when it completes,
+ * either due to timeout or due to closing, so, we just hold them until they dont
+ * have an ident field any more.
+ */
+ RFC1413* ident;
+ return (!user->GetExt("ident_data", ident));
+ }
+
+ virtual void OnCleanup(int target_type, void* item)
+ {
+ if (target_type == TYPE_USER)
+ {
+ userrec* user = (userrec*)item;
+ RFC1413* ident;
+ std::string* identstr;
+ if (user->GetExt("ident_data", ident))
+ {
+ // FIX: If the user record is deleted, the socket wont be removed
+ // immediately so there is chance of the socket trying to write to
+ // a user which has now vanished! To prevent this, set ident::u
+ // to NULL and check it so that we dont write users who have gone away.
+ ident->u = NULL;
+ ServerInstance->SE->DelFd(ident);
+ //delete ident;
+ }
+ if (user->GetExt("IDENT", identstr))
+ {
+ delete identstr;
+ }
+ }
}
- virtual bool OnUserReady(userrec* user)
+ virtual void OnUserDisconnect(userrec* user)
{
- return true;
+ /*
+ * when the user quits tidy up any ident lookup they have pending to keep things tidy.
+ * When we call RemoveSocket, the abstractions tied into the system evnetually work their
+ * way to RFC1459::OnClose(), which shrinks off the ident_data for us, so we dont need
+ * to do it here. If we don't tidy this up, there may still be lingering idents for users
+ * who have quit, as class RFC1459 is only loosely bound to userrec* via a pair of pointers
+ * and this would leave at least one of the invalid ;)
+ */
+ RFC1413* ident;
+ std::string* identstr;
+ if (user->GetExt("ident_data", ident))
+ {
+ ident->u = NULL;
+ ServerInstance->SE->DelFd(ident);
+ }
+ if (user->GetExt("IDENT", identstr))
+ {
+ delete identstr;
+ }
}
-
+
virtual ~ModuleIdent()
{
- delete Srv;
+ ServerInstance->next_call = ServerInstance->Time();
}
-
+
virtual Version GetVersion()
{
- return Version(1,0,0,1,VF_VENDOR);
+ return Version(1,1,0,0,VF_VENDOR,API_VERSION);
}
-
-};
-// stuff down here is the module-factory stuff. For basic modules you can ignore this.
+};
class ModuleIdentFactory : public ModuleFactory
{
ModuleIdentFactory()
{
}
-
+
~ModuleIdentFactory()
{
}
-
- virtual Module * CreateModule()
+
+ virtual Module * CreateModule(InspIRCd* Me)
{
- return new ModuleIdent;
+ return new ModuleIdent(Me);
}
-
+
};
-extern "C" void * init_module( void )
+extern "C" DllExport void * init_module( void )
{
return new ModuleIdentFactory;
}
projects / user / henk / code / inspircd.git / blobdiff