mirror of git://git.acid.vegas/anope.git
604 lines
18 KiB
C++
604 lines
18 KiB
C++
/* OperServ core functions
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*
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* (C) 2003-2022 Anope Team
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* Contact us at team@anope.org
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*
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* Please read COPYING and README for further details.
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*
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* Based on the original code of Epona by Lara.
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* Based on the original code of Services by Andy Church.
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*/
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#include "module.h"
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#include "modules/os_session.h"
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enum DefconLevel
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{
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DEFCON_NO_NEW_CHANNELS,
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DEFCON_NO_NEW_NICKS,
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DEFCON_NO_MLOCK_CHANGE,
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DEFCON_FORCE_CHAN_MODES,
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DEFCON_REDUCE_SESSION,
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DEFCON_NO_NEW_CLIENTS,
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DEFCON_OPER_ONLY,
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DEFCON_SILENT_OPER_ONLY,
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DEFCON_AKILL_NEW_CLIENTS,
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DEFCON_NO_NEW_MEMOS
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};
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bool DefConModesSet = false;
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struct DefconConfig
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{
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std::vector<std::bitset<32> > DefCon;
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std::set<Anope::string> DefConModesOn, DefConModesOff;
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std::map<Anope::string, Anope::string> DefConModesOnParams;
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int defaultlevel, sessionlimit;
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Anope::string chanmodes, message, offmessage, akillreason;
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std::vector<Anope::string> defcons;
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time_t akillexpire, timeout;
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bool globalondefcon;
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unsigned max_session_kill;
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time_t session_autokill_expiry;
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Anope::string sle_reason, sle_detailsloc;
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DefconConfig()
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{
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this->DefCon.resize(6);
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this->defcons.resize(5);
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}
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bool Check(DefconLevel level)
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{
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return this->Check(this->defaultlevel, level);
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}
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bool Check(int dlevel, DefconLevel level)
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{
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return this->DefCon[dlevel].test(level);
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}
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void Add(int dlevel, DefconLevel level)
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{
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this->DefCon[dlevel][level] = true;
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}
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void Del(int dlevel, DefconLevel level)
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{
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this->DefCon[dlevel][level] = false;
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}
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bool SetDefConParam(const Anope::string &name, const Anope::string &buf)
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{
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return DefConModesOnParams.insert(std::make_pair(name, buf)).second;
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}
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void UnsetDefConParam(const Anope::string &name)
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{
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DefConModesOnParams.erase(name);
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}
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bool GetDefConParam(const Anope::string &name, Anope::string &buf)
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{
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std::map<Anope::string, Anope::string>::iterator it = DefConModesOnParams.find(name);
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buf.clear();
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if (it != DefConModesOnParams.end())
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{
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buf = it->second;
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return true;
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}
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return false;
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}
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};
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static DefconConfig DConfig;
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static void runDefCon();
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static Anope::string defconReverseModes(const Anope::string &modes);
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static ServiceReference<GlobalService> GlobalService("GlobalService", "Global");
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static Timer *timeout;
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class DefConTimeout : public Timer
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{
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int level;
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public:
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DefConTimeout(Module *mod, int newlevel) : Timer(mod, DConfig.timeout), level(newlevel)
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{
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timeout = this;
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}
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~DefConTimeout()
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{
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timeout = NULL;
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}
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void Tick(time_t) anope_override
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{
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if (DConfig.defaultlevel != level)
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{
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DConfig.defaultlevel = level;
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FOREACH_MOD(OnDefconLevel, (level));
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Log(Config->GetClient("OperServ"), "operserv/defcon") << "Defcon level timeout, returning to level " << level;
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if (DConfig.globalondefcon)
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{
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if (!DConfig.offmessage.empty())
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GlobalService->SendGlobal(NULL, "", DConfig.offmessage);
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else
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GlobalService->SendGlobal(NULL, "", Anope::printf(Language::Translate(_("The Defcon level is now at: \002%d\002")), DConfig.defaultlevel));
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if (!DConfig.message.empty())
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GlobalService->SendGlobal(NULL, "", DConfig.message);
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}
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runDefCon();
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}
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}
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};
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class CommandOSDefcon : public Command
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{
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void SendLevels(CommandSource &source)
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{
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if (DConfig.Check(DEFCON_NO_NEW_CHANNELS))
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source.Reply(_("* No new channel registrations"));
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if (DConfig.Check(DEFCON_NO_NEW_NICKS))
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source.Reply(_("* No new nick registrations"));
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if (DConfig.Check(DEFCON_NO_MLOCK_CHANGE))
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source.Reply(_("* No mode lock changes"));
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if (DConfig.Check(DEFCON_FORCE_CHAN_MODES) && !DConfig.chanmodes.empty())
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source.Reply(_("* Force channel modes (%s) to be set on all channels"), DConfig.chanmodes.c_str());
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if (DConfig.Check(DEFCON_REDUCE_SESSION))
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source.Reply(_("* Use the reduced session limit of %d"), DConfig.sessionlimit);
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if (DConfig.Check(DEFCON_NO_NEW_CLIENTS))
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source.Reply(_("* Kill any new clients connecting"));
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if (DConfig.Check(DEFCON_OPER_ONLY))
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source.Reply(_("* Ignore non-opers with a message"));
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if (DConfig.Check(DEFCON_SILENT_OPER_ONLY))
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source.Reply(_("* Silently ignore non-opers"));
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if (DConfig.Check(DEFCON_AKILL_NEW_CLIENTS))
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source.Reply(_("* AKILL any new clients connecting"));
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if (DConfig.Check(DEFCON_NO_NEW_MEMOS))
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source.Reply(_("* No new memos sent"));
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}
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public:
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CommandOSDefcon(Module *creator) : Command(creator, "operserv/defcon", 1, 1)
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{
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this->SetDesc(_("Manipulate the DefCon system"));
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this->SetSyntax(_("[\0021\002|\0022\002|\0023\002|\0024\002|\0025\002]"));
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}
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void Execute(CommandSource &source, const std::vector<Anope::string> ¶ms) anope_override
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{
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const Anope::string &lvl = params[0];
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if (lvl.empty())
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{
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source.Reply(_("Services are now at DEFCON \002%d\002."), DConfig.defaultlevel);
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this->SendLevels(source);
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return;
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}
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int newLevel = 0;
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try
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{
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newLevel = convertTo<int>(lvl);
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}
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catch (const ConvertException &) { }
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if (newLevel < 1 || newLevel > 5)
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{
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this->OnSyntaxError(source, "");
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return;
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}
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DConfig.defaultlevel = newLevel;
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FOREACH_MOD(OnDefconLevel, (newLevel));
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delete timeout;
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if (DConfig.timeout)
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timeout = new DefConTimeout(this->module, 5);
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source.Reply(_("Services are now at DEFCON \002%d\002."), DConfig.defaultlevel);
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this->SendLevels(source);
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Log(LOG_ADMIN, source, this) << "to change defcon level to " << newLevel;
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/* Global notice the user what is happening. Also any Message that
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the Admin would like to add. Set in config file. */
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if (DConfig.globalondefcon)
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{
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if (DConfig.defaultlevel == 5 && !DConfig.offmessage.empty())
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GlobalService->SendGlobal(NULL, "", DConfig.offmessage);
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else if (DConfig.defaultlevel != 5)
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{
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GlobalService->SendGlobal(NULL, "", Anope::printf(_("The Defcon level is now at: \002%d\002"), DConfig.defaultlevel));
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if (!DConfig.message.empty())
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GlobalService->SendGlobal(NULL, "", DConfig.message);
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}
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}
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/* Run any defcon functions, e.g. FORCE CHAN MODE */
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runDefCon();
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return;
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}
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bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
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{
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this->SendSyntax(source);
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source.Reply(" ");
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source.Reply(_("The defcon system can be used to implement a pre-defined\n"
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"set of restrictions to services useful during an attempted\n"
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"attack on the network."));
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return true;
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}
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};
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class OSDefcon : public Module
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{
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ServiceReference<SessionService> session_service;
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ServiceReference<XLineManager> akills;
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CommandOSDefcon commandosdefcon;
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void ParseModeString()
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{
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int add = -1; /* 1 if adding, 0 if deleting, -1 if neither */
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unsigned char mode;
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ChannelMode *cm;
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ChannelModeParam *cmp;
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Anope::string modes, param;
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spacesepstream ss(DConfig.chanmodes);
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DConfig.DefConModesOn.clear();
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DConfig.DefConModesOff.clear();
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ss.GetToken(modes);
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/* Loop while there are modes to set */
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for (unsigned i = 0, end = modes.length(); i < end; ++i)
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{
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mode = modes[i];
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switch (mode)
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{
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case '+':
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add = 1;
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continue;
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case '-':
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add = 0;
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continue;
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default:
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if (add < 0)
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continue;
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}
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if ((cm = ModeManager::FindChannelModeByChar(mode)))
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{
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if (cm->type == MODE_STATUS || cm->type == MODE_LIST)
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{
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Log(this) << "DefConChanModes mode character '" << mode << "' cannot be locked";
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continue;
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}
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else if (add)
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{
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DConfig.DefConModesOn.insert(cm->name);
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DConfig.DefConModesOff.erase(cm->name);
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if (cm->type == MODE_PARAM)
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{
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cmp = anope_dynamic_static_cast<ChannelModeParam *>(cm);
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if (!ss.GetToken(param))
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{
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Log(this) << "DefConChanModes mode character '" << mode << "' has no parameter while one is expected";
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continue;
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}
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if (!cmp->IsValid(param))
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continue;
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DConfig.SetDefConParam(cmp->name, param);
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}
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}
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else if (DConfig.DefConModesOn.count(cm->name))
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{
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DConfig.DefConModesOn.erase(cm->name);
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if (cm->type == MODE_PARAM)
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DConfig.UnsetDefConParam(cm->name);
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}
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}
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}
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/* We can't mlock +L if +l is not mlocked as well. */
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if ((cm = ModeManager::FindChannelModeByName("REDIRECT")) && DConfig.DefConModesOn.count(cm->name) && !DConfig.DefConModesOn.count("LIMIT"))
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{
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DConfig.DefConModesOn.erase("REDIRECT");
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Log(this) << "DefConChanModes must lock mode +l as well to lock mode +L";
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}
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}
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public:
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OSDefcon(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR), session_service("SessionService", "session"), akills("XLineManager", "xlinemanager/sgline"), commandosdefcon(this)
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{
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}
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void OnReload(Configuration::Conf *conf) anope_override
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{
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Configuration::Block *block = conf->GetModule(this);
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DefconConfig dconfig;
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dconfig.defaultlevel = block->Get<int>("defaultlevel");
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dconfig.defcons[4] = block->Get<const Anope::string>("level4");
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dconfig.defcons[3] = block->Get<const Anope::string>("level3");
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dconfig.defcons[2] = block->Get<const Anope::string>("level2");
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dconfig.defcons[1] = block->Get<const Anope::string>("level1");
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dconfig.sessionlimit = block->Get<int>("sessionlimit");
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dconfig.akillreason = block->Get<const Anope::string>("akillreason");
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dconfig.akillexpire = block->Get<time_t>("akillexpire");
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dconfig.chanmodes = block->Get<const Anope::string>("chanmodes");
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dconfig.timeout = block->Get<time_t>("timeout");
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dconfig.globalondefcon = block->Get<bool>("globalondefcon");
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dconfig.message = block->Get<const Anope::string>("message");
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dconfig.offmessage = block->Get<const Anope::string>("offmessage");
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block = conf->GetModule("os_session");
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dconfig.max_session_kill = block->Get<int>("maxsessionkill");
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dconfig.session_autokill_expiry = block->Get<time_t>("sessionautokillexpiry");
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dconfig.sle_reason = block->Get<const Anope::string>("sessionlimitexceeded");
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dconfig.sle_detailsloc = block->Get<const Anope::string>("sessionlimitdetailsloc");
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if (dconfig.defaultlevel < 1 || dconfig.defaultlevel > 5)
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throw ConfigException("The value for <defcon:defaultlevel> must be between 1 and 5");
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else if (dconfig.akillexpire <= 0)
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throw ConfigException("The value for <defcon:akillexpire> must be greater than zero!");
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for (unsigned level = 1; level < 5; ++level)
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{
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spacesepstream operations(dconfig.defcons[level]);
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Anope::string operation;
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while (operations.GetToken(operation))
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{
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if (operation.equals_ci("nonewchannels"))
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dconfig.Add(level, DEFCON_NO_NEW_CHANNELS);
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else if (operation.equals_ci("nonewnicks"))
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dconfig.Add(level, DEFCON_NO_NEW_NICKS);
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else if (operation.equals_ci("nomlockchanges"))
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dconfig.Add(level, DEFCON_NO_MLOCK_CHANGE);
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else if (operation.equals_ci("forcechanmodes"))
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dconfig.Add(level, DEFCON_FORCE_CHAN_MODES);
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else if (operation.equals_ci("reducedsessions"))
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dconfig.Add(level, DEFCON_REDUCE_SESSION);
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else if (operation.equals_ci("nonewclients"))
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dconfig.Add(level, DEFCON_NO_NEW_CLIENTS);
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else if (operation.equals_ci("operonly"))
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dconfig.Add(level, DEFCON_OPER_ONLY);
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else if (operation.equals_ci("silentoperonly"))
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dconfig.Add(level, DEFCON_SILENT_OPER_ONLY);
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else if (operation.equals_ci("akillnewclients"))
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dconfig.Add(level, DEFCON_AKILL_NEW_CLIENTS);
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else if (operation.equals_ci("nonewmemos"))
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dconfig.Add(level, DEFCON_NO_NEW_MEMOS);
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}
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if (dconfig.Check(level, DEFCON_REDUCE_SESSION) && dconfig.sessionlimit <= 0)
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throw ConfigException("The value for <defcon:sessionlimit> must be greater than zero!");
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else if (dconfig.Check(level, DEFCON_AKILL_NEW_CLIENTS) && dconfig.akillreason.empty())
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throw ConfigException("The value for <defcon:akillreason> must not be empty!");
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else if (dconfig.Check(level, DEFCON_FORCE_CHAN_MODES) && dconfig.chanmodes.empty())
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throw ConfigException("The value for <defcon:chanmodes> must not be empty!");
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}
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DConfig = dconfig;
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this->ParseModeString();
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}
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EventReturn OnChannelModeSet(Channel *c, MessageSource &source, ChannelMode *mode, const Anope::string ¶m) anope_override
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{
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if (DConfig.Check(DEFCON_FORCE_CHAN_MODES) && DConfig.DefConModesOff.count(mode->name) && source.GetUser() && !source.GetBot())
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{
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c->RemoveMode(Config->GetClient("OperServ"), mode, param);
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return EVENT_STOP;
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}
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return EVENT_CONTINUE;
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}
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EventReturn OnChannelModeUnset(Channel *c, MessageSource &source, ChannelMode *mode, const Anope::string &) anope_override
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{
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if (DConfig.Check(DEFCON_FORCE_CHAN_MODES) && DConfig.DefConModesOn.count(mode->name) && source.GetUser() && !source.GetBot())
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{
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Anope::string param;
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if (DConfig.GetDefConParam(mode->name, param))
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c->SetMode(Config->GetClient("OperServ"), mode, param);
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else
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c->SetMode(Config->GetClient("OperServ"), mode);
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return EVENT_STOP;
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}
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return EVENT_CONTINUE;
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}
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EventReturn OnPreCommand(CommandSource &source, Command *command, std::vector<Anope::string> ¶ms) anope_override
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{
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if (DConfig.Check(DEFCON_OPER_ONLY) && !source.IsOper())
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{
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source.Reply(_("Services are in DefCon mode, please try again later."));
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return EVENT_STOP;
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}
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else if (DConfig.Check(DEFCON_SILENT_OPER_ONLY) && !source.IsOper())
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{
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return EVENT_STOP;
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}
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else if (command->name == "nickserv/register" || command->name == "nickserv/group")
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{
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if (DConfig.Check(DEFCON_NO_NEW_NICKS))
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{
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source.Reply(_("Services are in DefCon mode, please try again later."));
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return EVENT_STOP;
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}
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}
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else if (command->name == "chanserv/mode" && params.size() > 1 && params[1].equals_ci("LOCK"))
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{
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if (DConfig.Check(DEFCON_NO_MLOCK_CHANGE))
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{
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source.Reply(_("Services are in DefCon mode, please try again later."));
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return EVENT_STOP;
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}
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}
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else if (command->name == "chanserv/register")
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{
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if (DConfig.Check(DEFCON_NO_NEW_CHANNELS))
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{
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source.Reply(_("Services are in DefCon mode, please try again later."));
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return EVENT_STOP;
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}
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}
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else if (command->name == "memoserv/send")
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{
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if (DConfig.Check(DEFCON_NO_NEW_MEMOS))
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{
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source.Reply(_("Services are in DefCon mode, please try again later."));
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return EVENT_STOP;
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}
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}
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return EVENT_CONTINUE;
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}
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void OnUserConnect(User *u, bool &exempt) anope_override
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{
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if (exempt || u->Quitting() || !u->server->IsSynced() || u->server->IsULined())
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return;
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BotInfo *OperServ = Config->GetClient("OperServ");
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if (DConfig.Check(DEFCON_AKILL_NEW_CLIENTS) && akills)
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{
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Log(OperServ, "operserv/defcon") << "DEFCON: adding akill for *@" << u->host;
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XLine x("*@" + u->host, OperServ ? OperServ->nick : "defcon", Anope::CurTime + DConfig.akillexpire, DConfig.akillreason, XLineManager::GenerateUID());
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akills->Send(NULL, &x);
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}
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if (DConfig.Check(DEFCON_NO_NEW_CLIENTS) || DConfig.Check(DEFCON_AKILL_NEW_CLIENTS))
|
|
{
|
|
u->Kill(OperServ, DConfig.akillreason);
|
|
return;
|
|
}
|
|
|
|
if (DConfig.sessionlimit <= 0 || !session_service)
|
|
return;
|
|
|
|
Session *session = session_service->FindSession(u->ip.addr());
|
|
Exception *exception = session_service->FindException(u);
|
|
|
|
if (DConfig.Check(DEFCON_REDUCE_SESSION) && !exception)
|
|
{
|
|
if (session && session->count > static_cast<unsigned>(DConfig.sessionlimit))
|
|
{
|
|
if (!DConfig.sle_reason.empty())
|
|
{
|
|
Anope::string message = DConfig.sle_reason.replace_all_cs("%IP%", u->ip.addr());
|
|
u->SendMessage(OperServ, message);
|
|
}
|
|
if (!DConfig.sle_detailsloc.empty())
|
|
u->SendMessage(OperServ, DConfig.sle_detailsloc);
|
|
|
|
++session->hits;
|
|
if (akills && DConfig.max_session_kill && session->hits >= DConfig.max_session_kill)
|
|
{
|
|
XLine x("*@" + session->addr.mask(), OperServ ? OperServ->nick : "", Anope::CurTime + DConfig.session_autokill_expiry, "Defcon session limit exceeded", XLineManager::GenerateUID());
|
|
akills->Send(NULL, &x);
|
|
Log(OperServ, "akill/defcon") << "[DEFCON] Added a temporary AKILL for \002*@" << session->addr.mask() << "\002 due to excessive connections";
|
|
}
|
|
else
|
|
{
|
|
u->Kill(OperServ, "Defcon session limit exceeded");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void OnChannelModeAdd(ChannelMode *cm) anope_override
|
|
{
|
|
if (DConfig.chanmodes.find(cm->mchar) != Anope::string::npos)
|
|
this->ParseModeString();
|
|
}
|
|
|
|
void OnChannelSync(Channel *c) anope_override
|
|
{
|
|
if (DConfig.Check(DEFCON_FORCE_CHAN_MODES))
|
|
c->SetModes(Config->GetClient("OperServ"), false, "%s", DConfig.chanmodes.c_str());
|
|
}
|
|
};
|
|
|
|
static void runDefCon()
|
|
{
|
|
BotInfo *OperServ = Config->GetClient("OperServ");
|
|
if (DConfig.Check(DEFCON_FORCE_CHAN_MODES))
|
|
{
|
|
if (!DConfig.chanmodes.empty() && !DefConModesSet)
|
|
{
|
|
if (DConfig.chanmodes[0] == '+' || DConfig.chanmodes[0] == '-')
|
|
{
|
|
Log(OperServ, "operserv/defcon") << "DEFCON: setting " << DConfig.chanmodes << " on all channels";
|
|
DefConModesSet = true;
|
|
for (channel_map::const_iterator it = ChannelList.begin(), it_end = ChannelList.end(); it != it_end; ++it)
|
|
it->second->SetModes(OperServ, false, "%s", DConfig.chanmodes.c_str());
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!DConfig.chanmodes.empty() && DefConModesSet)
|
|
{
|
|
if (DConfig.chanmodes[0] == '+' || DConfig.chanmodes[0] == '-')
|
|
{
|
|
DefConModesSet = false;
|
|
Anope::string newmodes = defconReverseModes(DConfig.chanmodes);
|
|
if (!newmodes.empty())
|
|
{
|
|
Log(OperServ, "operserv/defcon") << "DEFCON: setting " << newmodes << " on all channels";
|
|
for (channel_map::const_iterator it = ChannelList.begin(), it_end = ChannelList.end(); it != it_end; ++it)
|
|
it->second->SetModes(OperServ, true, "%s", newmodes.c_str());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static Anope::string defconReverseModes(const Anope::string &modes)
|
|
{
|
|
if (modes.empty())
|
|
return "";
|
|
Anope::string newmodes;
|
|
for (unsigned i = 0, end = modes.length(); i < end; ++i)
|
|
{
|
|
if (modes[i] == '+')
|
|
newmodes += '-';
|
|
else if (modes[i] == '-')
|
|
newmodes += '+';
|
|
else
|
|
newmodes += modes[i];
|
|
}
|
|
return newmodes;
|
|
}
|
|
|
|
MODULE_INIT(OSDefcon)
|