src/modules/m_noctcp.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
   5  *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
   6  *   Copyright (C) 2013, 2017-2018, 2020 Sadie Powell <sadie@witchery.services>
   7  *   Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
   8  *   Copyright (C) 2012 Attila Molnar <attilamolnar@hush.com>
   9  *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
  10  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
  11  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
  12  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
  13  *   Copyright (C) 2006 Craig Edwards <brain@inspircd.org>
  14  *
  15  * This file is part of InspIRCd.  InspIRCd is free software: you can
  16  * redistribute it and/or modify it under the terms of the GNU General Public
  17  * License as published by the Free Software Foundation, version 2.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  21  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  22  * details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28
  29 #include "inspircd.h"
  30 #include "modules/exemption.h"
  31
  32 class NoCTCPUser : public SimpleUserModeHandler
  33 {
  34 public:
  35         NoCTCPUser(Module* Creator)
  36                 : SimpleUserModeHandler(Creator, "u_noctcp", 'T')
  37         {
  38                 if (!ServerInstance->Config->ConfValue("noctcp")->getBool("enableumode"))
  39                         DisableAutoRegister();
  40         }
  41 };
  42
  43 class ModuleNoCTCP : public Module
  44 {
  45         CheckExemption::EventProvider exemptionprov;
  46         SimpleChannelModeHandler nc;
  47         NoCTCPUser ncu;
  48
  49  public:
  50         ModuleNoCTCP()
  51                 : exemptionprov(this)
  52                 , nc(this, "noctcp", 'C')
  53                 , ncu(this)
  54         {
  55         }
  56
  57         Version GetVersion() CXX11_OVERRIDE
  58         {
  59                 return Version("Adds channel mode C (noctcp) which allows channels to block messages which contain CTCPs.", VF_VENDOR);
  60         }
  61
  62         ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
  63         {
  64                 if (!IS_LOCAL(user))
  65                         return MOD_RES_PASSTHRU;
  66
  67                 std::string ctcpname;
  68                 if (!details.IsCTCP(ctcpname) || irc::equals(ctcpname, "ACTION"))
  69                         return MOD_RES_PASSTHRU;
  70
  71                 switch (target.type)
  72                 {
  73                         case MessageTarget::TYPE_CHANNEL:
  74                         {
  75                                 if (user->HasPrivPermission("channels/ignore-noctcp"))
  76                                         return MOD_RES_PASSTHRU;
  77
  78                                 Channel* c = target.Get<Channel>();
  79                                 const Channel::MemberMap& members = c->GetUsers();
  80                                 for (Channel::MemberMap::const_iterator member = members.begin(); member != members.end(); ++member)
  81                                 {
  82                                         User* u = member->first;
  83                                         if (u->IsModeSet(ncu))
  84                                                 details.exemptions.insert(u);
  85                                 }
  86
  87                                 ModResult res = CheckExemption::Call(exemptionprov, user, c, "noctcp");
  88                                 if (res == MOD_RES_ALLOW)
  89                                         return MOD_RES_PASSTHRU;
  90
  91                                 if (c->IsModeSet(nc))
  92                                 {
  93                                         user->WriteNumeric(Numerics::CannotSendTo(c, "CTCPs", &nc));
  94                                         return MOD_RES_DENY;
  95                                 }
  96
  97                                 if (c->GetExtBanStatus(user, 'C') == MOD_RES_DENY)
  98                                 {
  99                                         user->WriteNumeric(Numerics::CannotSendTo(c, "CTCPs", 'C', "noctcp"));
 100                                         return MOD_RES_DENY;
 101                                 }
 102                                 break;
 103                         }
 104                         case MessageTarget::TYPE_USER:
 105                         {
 106                                 if (user->HasPrivPermission("users/ignore-noctcp"))
 107                                         return MOD_RES_PASSTHRU;
 108
 109                                 User* u = target.Get<User>();
 110                                 if (u->IsModeSet(ncu))
 111                                 {
 112                                         user->WriteNumeric(Numerics::CannotSendTo(u, "CTCPs", &ncu));
 113                                         return MOD_RES_DENY;
 114                                 }
 115                                 break;
 116                         }
 117                         case MessageTarget::TYPE_SERVER:
 118                                 break;
 119                 }
 120                 return MOD_RES_PASSTHRU;
 121         }
 122
 123         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
 124         {
 125                 tokens["EXTBAN"].push_back('C');
 126         }
 127 };
 128
 129 MODULE_INIT(ModuleNoCTCP)