src/modules/m_remove.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
   6  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2005, 2007 Robin Burchell <robin+git@viroteck.net>
   8  *   Copyright (C) 2005-2006 Craig Edwards <craigedwards@brainbox.cc>
   9  *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
  10  *
  11  * This file is part of InspIRCd.  InspIRCd is free software: you can
  12  * redistribute it and/or modify it under the terms of the GNU General Public
  13  * License as published by the Free Software Foundation, version 2.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "inspircd.h"
  26
  27 /*
  28  * This module supports the use of the +q and +a usermodes, but should work without them too.
  29  * Usage of the command is restricted to +hoaq, and you cannot remove a user with a "higher" level than yourself.
  30  * eg: +h can remove +hv and users with no modes. +a can remove +aohv and users with no modes.
  31 */
  32
  33 /** Base class for /FPART and /REMOVE
  34  */
  35 class RemoveBase : public Command
  36 {
  37         bool& supportnokicks;
  38         ChanModeReference& nokicksmode;
  39
  40  public:
  41         unsigned int protectedrank;
  42
  43         RemoveBase(Module* Creator, bool& snk, ChanModeReference& nkm, const char* cmdn)
  44                 : Command(Creator, cmdn, 2, 3)
  45                 , supportnokicks(snk)
  46                 , nokicksmode(nkm)
  47         {
  48         }
  49
  50         CmdResult HandleRMB(const std::vector<std::string>& parameters, User *user, bool fpart)
  51         {
  52                 User* target;
  53                 Channel* channel;
  54                 std::string reason;
  55
  56                 // If the command is a /REMOVE then detect the parameter order
  57                 bool neworder = ((fpart) || (parameters[0][0] == '#'));
  58
  59                 /* Set these to the parameters needed, the new version of this module switches it's parameters around
  60                  * supplying a new command with the new order while keeping the old /remove with the older order.
  61                  * /remove <nick> <channel> [reason ...]
  62                  * /fpart <channel> <nick> [reason ...]
  63                  */
  64                 const std::string& channame = parameters[neworder ? 0 : 1];
  65                 const std::string& username = parameters[neworder ? 1 : 0];
  66
  67                 /* Look up the user we're meant to be removing from the channel */
  68                 if (IS_LOCAL(user))
  69                         target = ServerInstance->FindNickOnly(username);
  70                 else
  71                         target = ServerInstance->FindNick(username);
  72
  73                 /* And the channel we're meant to be removing them from */
  74                 channel = ServerInstance->FindChan(channame);
  75
  76                 /* Fix by brain - someone needs to learn to validate their input! */
  77                 if ((!target) || (target->registered != REG_ALL) || (!channel))
  78                 {
  79                         user->WriteNumeric(Numerics::NoSuchNick(channel ? username.c_str() : channame.c_str()));
  80                         return CMD_FAILURE;
  81                 }
  82
  83                 if (!channel->HasUser(target))
  84                 {
  85                         user->WriteNotice(InspIRCd::Format("*** The user %s is not on channel %s", target->nick.c_str(), channel->name.c_str()));
  86                         return CMD_FAILURE;
  87                 }
  88
  89                 if (target->server->IsULine())
  90                 {
  91                         user->WriteNumeric(482, channame, "Only a u-line may remove a u-line from a channel.");
  92                         return CMD_FAILURE;
  93                 }
  94
  95                 /* We support the +Q channel mode via. the m_nokicks module, if the module is loaded and the mode is set then disallow the /remove */
  96                 if ((!IS_LOCAL(user)) || (!supportnokicks) || (!channel->IsModeSet(nokicksmode)))
  97                 {
  98                         /* We'll let everyone remove their level and below, eg:
  99                          * ops can remove ops, halfops, voices, and those with no mode (no moders actually are set to 1)
 100                          * a ulined target will get a higher level than it's possible for a /remover to get..so they're safe.
 101                          * Nobody may remove people with >= protectedrank rank.
 102                          */
 103                         unsigned int ulevel = channel->GetPrefixValue(user);
 104                         unsigned int tlevel = channel->GetPrefixValue(target);
 105                         if ((!IS_LOCAL(user)) || ((ulevel > VOICE_VALUE) && (ulevel >= tlevel) && ((protectedrank == 0) || (tlevel < protectedrank))))
 106                         {
 107                                 // REMOVE will be sent to the target's server and it will reply with a PART (or do nothing if it doesn't understand the command)
 108                                 if (!IS_LOCAL(target))
 109                                 {
 110                                         // Send an ENCAP REMOVE with parameters being in the old <user> <chan> order which is
 111                                         // compatible with both 2.0 and 2.2. This also turns FPART into REMOVE.
 112                                         std::vector<std::string> p;
 113                                         p.push_back(target->uuid);
 114                                         p.push_back(channel->name);
 115                                         if (parameters.size() > 2)
 116                                                 p.push_back(":" + parameters[2]);
 117                                         ServerInstance->PI->SendEncapsulatedData(target->server->GetName(), "REMOVE", p, user);
 118
 119                                         return CMD_SUCCESS;
 120                                 }
 121
 122                                 std::string reasonparam;
 123
 124                                 /* If a reason is given, use it */
 125                                 if(parameters.size() > 2)
 126                                         reasonparam = parameters[2];
 127                                 else
 128                                         reasonparam = "No reason given";
 129
 130                                 /* Build up the part reason string. */
 131                                 reason = "Removed by " + user->nick + ": " + reasonparam;
 132
 133                                 channel->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s removed %s from the channel", channel->name.c_str(), user->nick.c_str(), target->nick.c_str());
 134                                 target->WriteNotice("*** " + user->nick + " removed you from " + channel->name + " with the message: " + reasonparam);
 135
 136                                 channel->PartUser(target, reason);
 137                         }
 138                         else
 139                         {
 140                                 user->WriteNotice(InspIRCd::Format("*** You do not have access to /remove %s from %s", target->nick.c_str(), channel->name.c_str()));
 141                                 return CMD_FAILURE;
 142                         }
 143                 }
 144                 else
 145                 {
 146                         /* m_nokicks.so was loaded and +Q was set, block! */
 147                         user->WriteNumeric(ERR_RESTRICTED, channel->name, InspIRCd::Format("Can't remove user %s from channel (nokicks mode is set)", target->nick.c_str()));
 148                         return CMD_FAILURE;
 149                 }
 150
 151                 return CMD_SUCCESS;
 152         }
 153 };
 154
 155 /** Handle /REMOVE
 156  */
 157 class CommandRemove : public RemoveBase
 158 {
 159  public:
 160         CommandRemove(Module* Creator, bool& snk, ChanModeReference& nkm)
 161                 : RemoveBase(Creator, snk, nkm, "REMOVE")
 162         {
 163                 syntax = "<channel> <nick> [<reason>]";
 164                 TRANSLATE3(TR_NICK, TR_TEXT, TR_TEXT);
 165         }
 166
 167         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
 168         {
 169                 return HandleRMB(parameters, user, false);
 170         }
 171 };
 172
 173 /** Handle /FPART
 174  */
 175 class CommandFpart : public RemoveBase
 176 {
 177  public:
 178         CommandFpart(Module* Creator, bool& snk, ChanModeReference& nkm)
 179                 : RemoveBase(Creator, snk, nkm, "FPART")
 180         {
 181                 syntax = "<channel> <nick> [<reason>]";
 182                 TRANSLATE3(TR_TEXT, TR_NICK, TR_TEXT);
 183         }
 184
 185         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
 186         {
 187                 return HandleRMB(parameters, user, true);
 188         }
 189 };
 190
 191 class ModuleRemove : public Module
 192 {
 193         ChanModeReference nokicksmode;
 194         CommandRemove cmd1;
 195         CommandFpart cmd2;
 196         bool supportnokicks;
 197
 198  public:
 199         ModuleRemove()
 200                 : nokicksmode(this, "nokick")
 201                 , cmd1(this, supportnokicks, nokicksmode)
 202                 , cmd2(this, supportnokicks, nokicksmode)
 203         {
 204         }
 205
 206         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
 207         {
 208                 tokens["REMOVE"];
 209         }
 210
 211         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 212         {
 213                 ConfigTag* tag = ServerInstance->Config->ConfValue("remove");
 214                 supportnokicks = tag->getBool("supportnokicks");
 215                 cmd1.protectedrank = cmd2.protectedrank = tag->getInt("protectedrank", 50000);
 216         }
 217
 218         Version GetVersion() CXX11_OVERRIDE
 219         {
 220                 return Version("Provides a /remove command, this is mostly an alternative to /kick, except makes users appear to have parted the channel", VF_OPTCOMMON | VF_VENDOR);
 221         }
 222 };
 223
 224 MODULE_INIT(ModuleRemove)