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home » brain » inspircd-cvs » inspircd » src » modules

m_banexception.cpp

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/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2008 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 "inspircd.h"
#include "u_listmode.h"

/* $ModDesc: Provides support for the +e channel mode */
/* $ModDep: ../../include/u_listmode.h */

/* Written by Om<om@inspircd.org>, April 2005. */
/* Rewritten to use the listmode utility by Om, December 2005 */
/* Adapted from m_exception, which was originally based on m_chanprotect and m_silence */

// The +e channel mode takes a nick!ident@host, glob patterns allowed,
// and if a user matches an entry on the +e list then they can join the channel, overriding any (+b) bans set on them
// Now supports CIDR and IP addresses -- Brain


class BanException : public ListModeBase
{
 public:
        BanException(InspIRCd* Instance) : ListModeBase(Instance, 'e', "End of Channel Exception List", 348, 349, true) { }
};


class ModuleBanException : public Module
{
        BanException* be;


public:
        ModuleBanException(InspIRCd* Me) : Module(Me)
        {
                be = new BanException(ServerInstance);
                if (!ServerInstance->Modes->AddMode(be))
                        throw ModuleException("Could not add new modes!");
                ServerInstance->Modules->PublishInterface("ChannelBanList", this);

                be->DoImplements(this);
                Implementation list[] = { I_OnRehash, I_OnRequest, I_On005Numeric, I_OnCheckBan, I_OnCheckExtBan, I_OnCheckStringExtBan };
                Me->Modules->Attach(list, this, 6);

        }

        virtual void On005Numeric(std::string &output)
        {
                output.append(" EXCEPTS=e");
        }

        virtual int OnCheckExtBan(User *user, Channel *chan, char type)
        {
                if (chan != NULL)
                {
                        modelist *list;
                        chan->GetExt(be->GetInfoKey(), list);

                        if (!list)
                                return 0;

                        std::string mask = std::string(user->nick) + "!" + user->ident + "@" + user->GetIPString();
                        for (modelist::iterator it = list->begin(); it != list->end(); it++)
                        {
                                if (it->mask[0] != type || it->mask[1] != ':')
                                        continue;

                                std::string maskptr = it->mask.substr(2);

                                if (InspIRCd::Match(user->GetFullRealHost(), maskptr) || InspIRCd::Match(user->GetFullHost(), maskptr) || (InspIRCd::MatchCIDR(mask, maskptr)))
                                {
                                        // They match an entry on the list, so let them pass this.
                                        return 1;
                                }
                        }
                }

                return 0;
        }

        virtual int OnCheckStringExtBan(const std::string &str, Channel *chan, char type)
        {
                if (chan != NULL)
                {
                        modelist *list;
                        chan->GetExt(be->GetInfoKey(), list);

                        if (!list)
                                return 0;
                        for (modelist::iterator it = list->begin(); it != list->end(); it++)
                        {
                                if (it->mask[0] != type || it->mask[1] != ':')
                                        continue;

                                std::string maskptr = it->mask.substr(2);
                                if (InspIRCd::Match(str, maskptr))
                                        return 1; // matches
                        }
                }

                return 0;
        }

        virtual int OnCheckBan(User* user, Channel* chan)
        {
                if (chan != NULL)
                {
                        modelist* list;
                        chan->GetExt(be->GetInfoKey(), list);

                        if (!list)
                        {
                                // No list, proceed normally
                                return 0;
                        }

                        std::string mask = std::string(user->nick) + "!" + user->ident + "@" + user->GetIPString();
                        for (modelist::iterator it = list->begin(); it != list->end(); it++)
                        {
                                if (InspIRCd::Match(user->GetFullRealHost(), it->mask) || InspIRCd::Match(user->GetFullHost(), it->mask) || (InspIRCd::MatchCIDR(mask, it->mask)))
                                {
                                        // They match an entry on the list, so let them in.
                                        return 1;
                                }
                        }
                }
                return 0;
        }

        virtual void OnCleanup(int target_type, void* item)
        {
                be->DoCleanup(target_type, item);
        }

        virtual void OnSyncChannel(Channel* chan, Module* proto, void* opaque)
        {
                be->DoSyncChannel(chan, proto, opaque);
        }

        virtual void OnChannelDelete(Channel* chan)
        {
                be->DoChannelDelete(chan);
        }

        virtual void OnRehash(User* user, const std::string &param)
        {
                be->DoRehash();
        }

        virtual const char* OnRequest(Request* request)
        {
                return be->DoOnRequest(request);
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_banexception.cpp 10407 2008-09-06 13:04:26Z brain $", VF_COMMON | VF_VENDOR, API_VERSION);
        }

        virtual ~ModuleBanException()
        {
                ServerInstance->Modes->DelMode(be);
                delete be;
                ServerInstance->Modules->UnpublishInterface("ChannelBanList", this);
        }
};

MODULE_INIT(ModuleBanException)