cs_ban.cpp

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/* ChanServ core functions
 *
 * (C) 2003-2013 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church.
 */

/*************************************************************************/

#include "module.h"

static Module *me;

class TempBan : public CallBack
{
 private:
        Anope::string channel;
        Anope::string mask;

 public:
        TempBan(time_t seconds, Channel *c, const Anope::string &banmask) : CallBack(me, seconds), channel(c->name), mask(banmask) { }

        void Tick(time_t ctime) anope_override
        {
                Channel *c = Channel::Find(this->channel);
                if (c)
                        c->RemoveMode(NULL, "BAN", this->mask);
        }
};

class CommandCSBan : public Command
{
 public:
        CommandCSBan(Module *creator) : Command(creator, "chanserv/ban", 2, 4)
        {
                this->SetDesc(_("Bans a given nick or mask on a channel"));
                this->SetSyntax(_("\037channel\037 [+\037expiry\037] \037nick\037 [\037reason\037]"));
                this->SetSyntax(_("\037channel\037 [+\037expiry\037] \037mask\037 [\037reason\037]"));
        }

        void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
        {
                const Anope::string &chan = params[0];

                ChannelInfo *ci = ChannelInfo::Find(chan);
                if (ci == NULL)
                {
                        source.Reply(CHAN_X_NOT_REGISTERED, chan.c_str());
                        return;
                }

                Anope::string expiry, target, reason;
                time_t ban_time;
                if (params[1][0] == '+')
                {
                        ban_time = Anope::DoTime(params[1]);
                        if (params.size() < 3)
                        {
                                this->SendSyntax(source);
                                return;
                        }
                        target = params[2];
                        reason = "Requested";
                        if (params.size() > 3)
                                reason = params[3];
                }
                else
                {
                        ban_time = 0;
                        target = params[1];
                        reason = "Requested";
                        if (params.size() > 2)
                                reason = params[2];
                        if (params.size() > 3)
                                reason += " " + params[3];
                }

                if (reason.length() > Config->CSReasonMax)
                        reason = reason.substr(0, Config->CSReasonMax);

                Channel *c = ci->c;
                User *u = source.GetUser();
                User *u2 = User::Find(target, true);

                AccessGroup u_access = source.AccessFor(ci);

                if (!c)
                        source.Reply(CHAN_X_NOT_IN_USE, chan.c_str());
                else if (!u_access.HasPriv("BAN") && !source.HasPriv("chanserv/kick"))
                        source.Reply(ACCESS_DENIED);
                else if (u2)
                {
                        AccessGroup u2_access = ci->AccessFor(u2);

                        if (u != u2 && ci->HasExt("PEACE") && u2_access >= u_access && !source.HasPriv("chanserv/kick"))
                                source.Reply(ACCESS_DENIED);
                        /*
                         * Dont ban/kick the user on channels where he is excepted
                         * to prevent services <-> server wars.
                         */
                        else if (ci->c->MatchesList(u2, "EXCEPT"))
                                source.Reply(CHAN_EXCEPTED, u2->nick.c_str(), ci->name.c_str());
                        else if (u2->IsProtected())
                                source.Reply(ACCESS_DENIED);
                        else
                        {
                                Anope::string mask = ci->GetIdealBan(u2);

                                bool override = !u_access.HasPriv("BAN") || (u != u2 && ci->HasExt("PEACE") && u2_access >= u_access);
                                Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "for " << mask;

                                if (!c->HasMode("BAN", mask))
                                {
                                        c->SetMode(NULL, "BAN", mask);
                                        if (ban_time)
                                        {
                                                new TempBan(ban_time, c, mask);
                                                source.Reply(_("Ban on \002%s\002 expires in %s."), mask.c_str(), Anope::Duration(ban_time, source.GetAccount()).c_str());
                                        }
                                }

                                /* We still allow host banning while not allowing to kick */
                                if (!c->FindUser(u2))
                                        return;

                                if (ci->HasExt("SIGNKICK") || (ci->HasExt("SIGNKICK_LEVEL") && !source.AccessFor(ci).HasPriv("SIGNKICK")))
                                        c->Kick(ci->WhoSends(), u2, "%s (%s)", reason.c_str(), source.GetNick().c_str());
                                else
                                        c->Kick(ci->WhoSends(), u2, "%s", reason.c_str());
                        }
                }
                else if (u_access.HasPriv("FOUNDER"))
                {
                        Log(LOG_COMMAND, source, this, ci) << "for " << target;

                        if (!c->HasMode("BAN", target))
                        {
                                c->SetMode(NULL, "BAN", target);
                                if (ban_time)
                                {
                                        new TempBan(ban_time, c, target);
                                        source.Reply(_("Ban on \002%s\002 expires in %s."), target.c_str(), Anope::Duration(ban_time, source.GetAccount()).c_str());
                                }
                        }

                        int matched = 0, kicked = 0;
                        for (Channel::ChanUserList::iterator it = c->users.begin(), it_end = c->users.end(); it != it_end;)
                        {
                                ChanUserContainer *uc = *it++;

                                if (Anope::Match(uc->user->nick, target) || Anope::Match(uc->user->GetDisplayedMask(), target))
                                {
                                        ++matched;

                                        AccessGroup u2_access = ci->AccessFor(uc->user);

                                        if (u != uc->user && ci->HasExt("PEACE") && u2_access >= u_access)
                                                continue;
                                        else if (ci->c->MatchesList(uc->user, "EXCEPT"))
                                                continue;
                                        else if (uc->user->IsProtected())
                                                continue;

                                        ++kicked;
                                        if (ci->HasExt("SIGNKICK") || (ci->HasExt("SIGNKICK_LEVEL") && !u_access.HasPriv("SIGNKICK")))
                                                c->Kick(ci->WhoSends(), uc->user, "%s (Matches %s) (%s)", reason.c_str(), target.c_str(), source.GetNick().c_str());
                                        else
                                                c->Kick(ci->WhoSends(), uc->user, "%s (Matches %s)", reason.c_str(), target.c_str());
                                }
                        }

                        if (matched)
                                source.Reply(_("Kicked %d/%d users matching %s from %s."), kicked, matched, target.c_str(), c->name.c_str());
                        else
                                source.Reply(_("No users on %s match %s."), c->name.c_str(), target.c_str());
                }
                else
                        source.Reply(NICK_X_NOT_IN_USE, target.c_str());
        }

        bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
        {
                this->SendSyntax(source);
                source.Reply(" ");
                source.Reply(_("Bans a given nick or mask on a channel. An optional expiry may\n"
                                "be given to cause services to remove the ban after a set amount\n"
                                "of time.\n"
                                " \n"
                                "By default, limited to AOPs or those with level 5 access\n"
                                "and above on the channel. Channel founders may ban masks."));
                return true;
        }
};

class CSBan : public Module
{
        CommandCSBan commandcsban;

 public:
        CSBan(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, CORE), commandcsban(this)
        {
                this->SetAuthor("Anope");
                me = this;
        }
};

MODULE_INIT(CSBan)