1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include "users.h"
\r#include "modules.h"
\r#include "dns.h"
\r#ifndef WINDOWS
\r#include <sys/socket.h>
\r#include <netinet/in.h>
\r#include <arpa/inet.h>
\r#endif
\r\r/* $ModDesc: Change user's hosts connecting from known CGI:IRC hosts */
\r\renum CGItype { PASS, IDENT, PASSFIRST, IDENTFIRST, WEBIRC };
\r\r\r/** Holds a CGI site's details
\r */
\rclass CGIhost : public classbase
\r{
\rpublic:
\r std::string hostmask;
\r CGItype type;
\r std::string password;
\r\r CGIhost(const std::string &mask = "", CGItype t = IDENTFIRST, const std::string &password ="")
\r : hostmask(mask), type(t), password(password)
\r {
\r }
\r};
\rtypedef std::vector<CGIhost> CGIHostlist;
\r\rclass cmd_webirc : public command_t
\r{
\r InspIRCd* Me;
\r CGIHostlist Hosts;
\r bool notify;
\r public:
\r cmd_webirc(InspIRCd* Me, CGIHostlist &Hosts, bool notify) : command_t(Me, "WEBIRC", 0, 4, true), Hosts(Hosts), notify(notify)
\r {
\r this->source = "m_cgiirc.so";
\r this->syntax = "password client hostname ip";
\r }
\r CmdResult Handle(const char** parameters, int pcnt, userrec *user)
\r {
\r if(user->registered == REG_ALL)
\r return CMD_FAILURE;
\r \r for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
\r {
\r if(ServerInstance->MatchText(user->host, iter->hostmask) || ServerInstance->MatchText(user->GetIPString(), iter->hostmask))
\r {
\r if(iter->type == WEBIRC && parameters[0] == iter->password)
\r {
\r user->Extend("cgiirc_realhost", new std::string(user->host));
\r user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
\r if (notify)
\r 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);
\r user->Extend("cgiirc_webirc_hostname", new std::string(parameters[2]));
\r user->Extend("cgiirc_webirc_ip", new std::string(parameters[3]));
\r return CMD_LOCALONLY;
\r }
\r }
\r }
\r return CMD_FAILURE;
\r }
\r};
\r\r\r/** Resolver for CGI:IRC hostnames encoded in ident/GECOS
\r */
\rclass CGIResolver : public Resolver
\r{
\r std::string typ;
\r int theirfd;
\r userrec* them;
\r bool notify;
\r public:
\r CGIResolver(Module* me, InspIRCd* ServerInstance, bool NotifyOpers, const std::string &source, bool forward, userrec* u, int userfd, const std::string &type, bool &cached)
\r : Resolver(ServerInstance, source, forward ? DNS_QUERY_A : DNS_QUERY_PTR4, cached, me), typ(type), theirfd(userfd), them(u), notify(NotifyOpers) { }
\r\r virtual void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
\r {
\r /* Check the user still exists */
\r if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
\r {
\r if (notify)
\r 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());
\r\r strlcpy(them->host, result.c_str(), 63);
\r strlcpy(them->dhost, result.c_str(), 63);
\r strlcpy(them->ident, "~cgiirc", 8);
\r them->InvalidateCache();
\r }
\r }
\r\r virtual void OnError(ResolverError e, const std::string &errormessage)
\r {
\r if ((them) && (them == ServerInstance->SE->GetRef(theirfd)))
\r {
\r if (notify)
\r 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());
\r }
\r }
\r\r virtual ~CGIResolver()
\r {
\r }
\r};
\r\rclass ModuleCgiIRC : public Module
\r{
\r cmd_webirc* mycommand;
\r bool NotifyOpers;
\r CGIHostlist Hosts;
\rpublic:
\r ModuleCgiIRC(InspIRCd* Me) : Module(Me)
\r {
\r \r OnRehash(NULL,"");
\r mycommand=new cmd_webirc(Me, Hosts, NotifyOpers);
\r ServerInstance->AddCommand(mycommand);
\r }
\r\r void Implements(char* List)
\r {
\r List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCleanup] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUserQuit] = List[I_OnUserConnect] = 1;
\r }
\r \r virtual Priority Prioritize()
\r {
\r // We want to get here before m_cloaking and m_hostchange etc
\r return PRIORITY_FIRST;
\r }
\r\r virtual void OnRehash(userrec* user, const std::string ¶meter)
\r {
\r ConfigReader Conf(ServerInstance);
\r \r NotifyOpers = Conf.ReadFlag("cgiirc", "opernotice", 0); // If we send an oper notice when a CGI:IRC has their host changed.
\r \r if(Conf.GetError() == CONF_VALUE_NOT_FOUND)
\r NotifyOpers = true;
\r \r for(int i = 0; i < Conf.Enumerate("cgihost"); i++)
\r {
\r std::string hostmask = Conf.ReadValue("cgihost", "mask", i); // An allowed CGI:IRC host
\r std::string type = Conf.ReadValue("cgihost", "type", i); // What type of user-munging we do on this host.
\r std::string password = Conf.ReadValue("cgihost", "password", i);
\r \r if(hostmask.length())
\r {
\r if(type == "webirc" && !password.length()) {
\r ServerInstance->Log(DEFAULT, "m_cgiirc: Missing password in config: %s", hostmask.c_str());
\r } else {
\r CGItype cgitype;
\r if(type == "pass")
\r cgitype = PASS;
\r else if(type == "ident")
\r cgitype = IDENT;
\r else if(type == "passfirst")
\r cgitype = PASSFIRST;
\r else if(type == "webirc") {
\r cgitype = WEBIRC;
\r }
\r Hosts.push_back(CGIhost(hostmask,cgitype, password.length() ? password : "" ));
\r }
\r }
\r else
\r {
\r ServerInstance->Log(DEFAULT, "m_cgiirc.so: Invalid <cgihost:mask> value in config: %s", hostmask.c_str());
\r continue;
\r }
\r }
\r }
\r\r virtual void OnCleanup(int target_type, void* item)
\r {
\r if(target_type == TYPE_USER)
\r {
\r userrec* user = (userrec*)item;
\r std::string* realhost;
\r std::string* realip;
\r \r if(user->GetExt("cgiirc_realhost", realhost))
\r {
\r delete realhost;
\r user->Shrink("cgiirc_realhost");
\r }
\r \r if(user->GetExt("cgiirc_realip", realip))
\r {
\r delete realip;
\r user->Shrink("cgiirc_realip");
\r }
\r }
\r }
\r \r virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname, bool displayable)
\r {
\r if((extname == "cgiirc_realhost") || (extname == "cgiirc_realip"))
\r {
\r std::string* data;
\r \r if(user->GetExt(extname, data))
\r {
\r proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, *data);
\r }
\r }
\r }
\r\r virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
\r {
\r if(target_type == TYPE_USER)
\r {
\r userrec* dest = (userrec*)target;
\r std::string* bleh;
\r if(((extname == "cgiirc_realhost") || (extname == "cgiirc_realip")) && (!dest->GetExt(extname, bleh)))
\r {
\r dest->Extend(extname, new std::string(extdata));
\r }
\r }
\r }
\r\r virtual void OnUserQuit(userrec* user, const std::string &message, const std::string &oper_message)
\r {
\r OnCleanup(TYPE_USER, user);
\r }
\r \r\r virtual int OnUserRegister(userrec* user)
\r {
\r for(CGIHostlist::iterator iter = Hosts.begin(); iter != Hosts.end(); iter++)
\r {
\r if(ServerInstance->MatchText(user->host, iter->hostmask) || ServerInstance->MatchText(user->GetIPString(), iter->hostmask))
\r {
\r // Deal with it...
\r if(iter->type == PASS)
\r {
\r CheckPass(user); // We do nothing if it fails so...
\r }
\r else if(iter->type == PASSFIRST && !CheckPass(user))
\r {
\r // If the password lookup failed, try the ident
\r CheckIdent(user); // If this fails too, do nothing
\r }
\r else if(iter->type == IDENT)
\r {
\r CheckIdent(user); // Nothing on failure.
\r }
\r else if(iter->type == IDENTFIRST && !CheckIdent(user))
\r {
\r // If the ident lookup fails, try the password.
\r CheckPass(user);
\r }
\r else if(iter->type == WEBIRC)
\r {
\r // We don't need to do anything here
\r }
\r return 0;
\r }
\r }
\r return 0;
\r }
\r\r virtual void OnUserConnect(userrec* user)
\r {
\r std::string *webirc_hostname, *webirc_ip;
\r if(user->GetExt("cgiirc_webirc_hostname", webirc_hostname))
\r {
\r strlcpy(user->host,webirc_hostname->c_str(),63);
\r strlcpy(user->dhost,webirc_hostname->c_str(),63);
\r delete webirc_hostname;
\r user->InvalidateCache();
\r user->Shrink("cgiirc_webirc_hostname");
\r }
\r if(user->GetExt("cgiirc_webirc_ip", webirc_ip))
\r {
\r bool valid=false;
\r user->RemoveCloneCounts();
\r#ifdef IPV6
\r valid = (inet_pton(AF_INET6, webirc_ip->c_str(), &((sockaddr_in6*)user->ip)->sin6_addr) > 0);
\r\r if(!valid)
\r valid = (inet_aton(webirc_ip->c_str(), &((sockaddr_in*)user->ip)->sin_addr));
\r#else
\r if (inet_aton(webirc_ip->c_str(), &((sockaddr_in*)user->ip)->sin_addr))
\r valid = true;
\r#endif
\r\r delete webirc_ip;
\r user->InvalidateCache();
\r user->Shrink("cgiirc_webirc_ip");
\r ServerInstance->AddLocalClone(user);
\r ServerInstance->AddGlobalClone(user);
\r user->CheckClass();
\r }
\r }
\r\r bool CheckPass(userrec* user)
\r {
\r if(IsValidHost(user->password))
\r {
\r user->Extend("cgiirc_realhost", new std::string(user->host));
\r user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
\r strlcpy(user->host, user->password, 64);
\r strlcpy(user->dhost, user->password, 64);
\r user->InvalidateCache();
\r\r bool valid = false;
\r user->RemoveCloneCounts();
\r#ifdef IPV6
\r if (user->GetProtocolFamily() == AF_INET6)
\r valid = (inet_pton(AF_INET6, user->password, &((sockaddr_in6*)user->ip)->sin6_addr) > 0);
\r else
\r valid = (inet_aton(user->password, &((sockaddr_in*)user->ip)->sin_addr));
\r#else
\r if (inet_aton(user->password, &((sockaddr_in*)user->ip)->sin_addr))
\r valid = true;
\r#endif
\r ServerInstance->AddLocalClone(user);
\r ServerInstance->AddGlobalClone(user);
\r user->CheckClass();
\r\r if (valid)
\r {
\r /* We were given a IP in the password, we don't do DNS so they get this is as their host as well. */
\r if(NotifyOpers)
\r ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);
\r }
\r else
\r {
\r /* We got as resolved hostname in the password. */
\r try
\r {
\r\r bool cached;
\r CGIResolver* r = new CGIResolver(this, ServerInstance, NotifyOpers, user->password, false, user, user->GetFd(), "PASS", cached);
\r ServerInstance->AddResolver(r, cached);
\r }
\r catch (...)
\r {
\r if (NotifyOpers)
\r ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
\r }
\r }
\r \r *user->password = 0;
\r\r /*if(NotifyOpers)
\r ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), changing real host to %s from PASS", user->nick, user->host, user->password);*/
\r\r return true;
\r }
\r \r return false;
\r }
\r \r bool CheckIdent(userrec* user)
\r {
\r int ip[4];
\r char* ident;
\r char newip[16];
\r int len = strlen(user->ident);
\r \r if(len == 8)
\r ident = user->ident;
\r else if(len == 9 && *user->ident == '~')
\r ident = user->ident+1;
\r else
\r return false;
\r \r for(int i = 0; i < 4; i++)
\r if(!HexToInt(ip[i], ident + i*2))
\r return false;
\r\r snprintf(newip, 16, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
\r \r user->Extend("cgiirc_realhost", new std::string(user->host));
\r user->Extend("cgiirc_realip", new std::string(user->GetIPString()));
\r user->RemoveCloneCounts();
\r#ifdef IPV6
\r if (user->GetProtocolFamily() == AF_INET6)
\r inet_pton(AF_INET6, newip, &((sockaddr_in6*)user->ip)->sin6_addr);
\r else
\r#endif
\r inet_aton(newip, &((sockaddr_in*)user->ip)->sin_addr);
\r ServerInstance->AddLocalClone(user);
\r ServerInstance->AddGlobalClone(user);
\r user->CheckClass();
\r try
\r {
\r strlcpy(user->host, newip, 16);
\r strlcpy(user->dhost, newip, 16);
\r strlcpy(user->ident, "~cgiirc", 8);
\r\r bool cached;
\r CGIResolver* r = new CGIResolver(this, ServerInstance, NotifyOpers, newip, false, user, user->GetFd(), "IDENT", cached);
\r ServerInstance->AddResolver(r, cached);
\r }
\r catch (...)
\r {
\r strlcpy(user->host, newip, 16);
\r strlcpy(user->dhost, newip, 16);
\r strlcpy(user->ident, "~cgiirc", 8);
\r user->InvalidateCache();
\r\r if(NotifyOpers)
\r ServerInstance->WriteOpers("*** Connecting user %s detected as using CGI:IRC (%s), but i could not resolve their hostname!", user->nick, user->host);
\r }
\r /*strlcpy(user->host, newip, 16);
\r strlcpy(user->dhost, newip, 16);
\r strlcpy(user->ident, "~cgiirc", 8);*/
\r\r return true;
\r }
\r \r bool IsValidHost(const std::string &host)
\r {
\r if(!host.size())
\r return false;
\r \r for(unsigned int i = 0; i < host.size(); i++)
\r {
\r if( ((host[i] >= '0') && (host[i] <= '9')) ||
\r ((host[i] >= 'A') && (host[i] <= 'Z')) ||
\r ((host[i] >= 'a') && (host[i] <= 'z')) ||
\r ((host[i] == '-') && (i > 0) && (i+1 < host.size()) && (host[i-1] != '.') && (host[i+1] != '.')) ||
\r ((host[i] == '.') && (i > 0) && (i+1 < host.size())) )
\r \r continue;
\r else
\r return false;
\r }
\r \r return true;
\r }
\r\r bool IsValidIP(const std::string &ip)
\r {
\r if(ip.size() < 7 || ip.size() > 15)
\r return false;
\r \r short sincedot = 0;
\r short dots = 0;
\r \r for(unsigned int i = 0; i < ip.size(); i++)
\r {
\r if((dots <= 3) && (sincedot <= 3))
\r {
\r if((ip[i] >= '0') && (ip[i] <= '9'))
\r {
\r sincedot++;
\r }
\r else if(ip[i] == '.')
\r {
\r sincedot = 0;
\r dots++;
\r }
\r }
\r else
\r {
\r return false;
\r \r }
\r }
\r \r if(dots != 3)
\r return false;
\r \r return true;
\r }
\r \r bool HexToInt(int &out, const char* in)
\r {
\r char ip[3];
\r ip[0] = in[0];
\r ip[1] = in[1];
\r ip[2] = 0;
\r out = strtol(ip, NULL, 16);
\r \r if(out > 255 || out < 0)
\r return false;
\r\r return true;
\r }
\r \r virtual ~ModuleCgiIRC()
\r {
\r }
\r \r virtual Version GetVersion()
\r {
\r return Version(1,1,0,0,VF_VENDOR,API_VERSION);
\r }
\r \r};
\r\rMODULE_INIT(ModuleCgiIRC)
\r
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