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

m_servprotect.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"

/* $ModDesc: Provides support for Austhex style +k / UnrealIRCD +S services mode */

class ServProtectMode : public ModeHandler
{
 public:
        ServProtectMode(InspIRCd* Instance) : ModeHandler(Instance, 'k', 0, 0, false, MODETYPE_USER, true) { }

        ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding, bool)
        {
                /* Because this returns MODEACTION_DENY all the time, there is only ONE 
                 * way to add this mode and that is at client introduction in the UID command,
                 * as this calls OnModeChange for each mode but disregards the return values.
                 * The mode cannot be manually added or removed, not even by a server or by a remote
                 * user or uline, which prevents its (ab)use as a kiddie 'god mode' on such networks.
                 * I'm sure if someone really wants to do that they can make a copy of this module
                 * that does the job. It won't be me though!
                 */
                return MODEACTION_DENY;
        }

        bool NeedsOper() { return true; }
};

class ModuleServProtectMode : public Module
{

        ServProtectMode* bm;
 public:
        ModuleServProtectMode(InspIRCd* Me)
                : Module(Me)
        {

                bm = new ServProtectMode(ServerInstance);
                if (!ServerInstance->Modes->AddMode(bm))
                        throw ModuleException("Could not add new modes!");
                Implementation eventlist[] = { I_OnWhois, I_OnKill, I_OnWhoisLine, I_OnRawMode, I_OnUserPreKick };
                ServerInstance->Modules->Attach(eventlist, this, 5);
        }


        virtual ~ModuleServProtectMode()
        {
                ServerInstance->Modes->DelMode(bm);
                delete bm;
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_servprotect.cpp 10622 2008-10-04 21:27:52Z brain $",VF_COMMON,API_VERSION);
        }

        virtual void OnWhois(User* src, User* dst)
        {
                if (dst->IsModeSet('k'))
                {
                        ServerInstance->SendWhoisLine(src, dst, 310, std::string(src->nick)+" "+std::string(dst->nick)+" :is an "+ServerInstance->Config->Network+" Service");
                }
        }

        virtual int OnRawMode(User* user, Channel* chan, const char mode, const std::string &param, bool adding, int pcnt, bool servermode)
        {
                /* Check that the mode is not a server mode, it is being removed, the user making the change is local, there is a parameter,
                 * and the user making the change is not a uline
                 */
                if (!servermode && !adding && chan && IS_LOCAL(user) && !param.empty() && !ServerInstance->ULine(user->server))
                {
                        /* Check if the parameter is a valid nick/uuid
                         */
                        User *u = ServerInstance->FindNick(param);
                        if (u)
                        {
                                /* The target user has +k set on themselves, and you are trying to remove a privilege mode the user has set on themselves.
                                 * This includes any prefix permission mode, even those registered in other modules, e.g. +qaohv. Using ::ModeString()
                                 * here means that the number of modes is restricted to only modes the user has, limiting it to as short a loop as possible.
                                 */
                                if (u->IsModeSet('k') && ServerInstance->Modes->ModeString(u, chan, false).find(mode) != std::string::npos)
                                {
                                        /* BZZZT, Denied! */
                                        user->WriteNumeric(482, "%s %s :You are not permitted to remove privileges from %s services", user->nick.c_str(), chan->name.c_str(), ServerInstance->Config->Network);
                                        return ACR_DENY;
                                }
                        }
                }
                /* Mode allowed */
                return 0;
        }

        virtual int OnKill(User* src, User* dst, const std::string &reason)
        {
                if (src == NULL)
                        return 0;

                if (dst->IsModeSet('k'))
                {
                        src->WriteNumeric(485, "%s :You are not permitted to kill %s services!", src->nick.c_str(), ServerInstance->Config->Network);
                        ServerInstance->SNO->WriteToSnoMask('A', std::string(src->nick)+" tried to kill service "+dst->nick+" ("+reason+")");
                        return 1;
                }
                return 0;
        }

        virtual int OnUserPreKick(User *src, User *dst, Channel *c, const std::string &reason)
        {
                if (dst->IsModeSet('k'))
                {
                        src->WriteNumeric(484, "%s %s :You are not permitted to kick services", src->nick.c_str(), c->name.c_str());
                        return 1;
                }

                return 0;
        }

        virtual int OnWhoisLine(User* src, User* dst, int &numeric, std::string &text)
        {
                return ((src != dst) && (numeric == 319) && dst->IsModeSet('k'));
        }
};


MODULE_INIT(ModuleServProtectMode)