src/coremods/core_channel/cmd_kick.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
   6  *
   7  * This file is part of InspIRCd.  InspIRCd is free software: you can
   8  * redistribute it and/or modify it under the terms of the GNU General Public
   9  * License as published by the Free Software Foundation, version 2.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  14  * details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include "inspircd.h"
  22 #include "core_channel.h"
  23
  24 CommandKick::CommandKick(Module* parent)
  25         : Command(parent, "KICK", 2, 3)
  26 {
  27         syntax = "<channel> <nick>{,<nick>} [<reason>]";
  28 }
  29
  30 /** Handle /KICK
  31  */
  32 CmdResult CommandKick::Handle (const std::vector<std::string>& parameters, User *user)
  33 {
  34         Channel* c = ServerInstance->FindChan(parameters[0]);
  35         User* u;
  36
  37         if (CommandParser::LoopCall(user, this, parameters, 1))
  38                 return CMD_SUCCESS;
  39
  40         if (IS_LOCAL(user))
  41                 u = ServerInstance->FindNickOnly(parameters[1]);
  42         else
  43                 u = ServerInstance->FindNick(parameters[1]);
  44
  45         if (!c)
  46         {
  47                 user->WriteNumeric(Numerics::NoSuchChannel(parameters[0]));
  48                 return CMD_FAILURE;
  49         }
  50         if ((!u) || (u->registered != REG_ALL))
  51         {
  52                 user->WriteNumeric(Numerics::NoSuchNick(parameters[1]));
  53                 return CMD_FAILURE;
  54         }
  55
  56         Membership* srcmemb = NULL;
  57         if (IS_LOCAL(user))
  58         {
  59                 srcmemb = c->GetUser(user);
  60                 if (!srcmemb)
  61                 {
  62                         user->WriteNumeric(ERR_NOTONCHANNEL, parameters[0], "You're not on that channel!");
  63                         return CMD_FAILURE;
  64                 }
  65
  66                 if (u->server->IsULine())
  67                 {
  68                         user->WriteNumeric(ERR_CHANOPRIVSNEEDED, c->name, "You may not kick a u-lined client");
  69                         return CMD_FAILURE;
  70                 }
  71         }
  72
  73         const Channel::MemberMap::iterator victimiter = c->userlist.find(u);
  74         if (victimiter == c->userlist.end())
  75         {
  76                 user->WriteNumeric(ERR_USERNOTINCHANNEL, u->nick, c->name, "They are not on that channel");
  77                 return CMD_FAILURE;
  78         }
  79         Membership* const memb = victimiter->second;
  80
  81         // KICKs coming from servers can carry a membership id
  82         if ((!IS_LOCAL(user)) && (parameters.size() > 3))
  83         {
  84                 // If the current membership id is not equal to the one in the message then the user rejoined
  85                 if (memb->id != Membership::IdFromString(parameters[2]))
  86                 {
  87                         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Dropped KICK due to membership id mismatch: " + ConvToStr(memb->id) + " != " + parameters[2]);
  88                         return CMD_FAILURE;
  89                 }
  90         }
  91
  92         const bool has_reason = (parameters.size() > 2);
  93         const std::string reason((has_reason ? parameters.back() : user->nick), 0, ServerInstance->Config->Limits.MaxKick);
  94
  95         // Do the following checks only if the KICK is done by a local user;
  96         // each server enforces its own rules.
  97         if (srcmemb)
  98         {
  99                 // Modules are allowed to explicitly allow or deny kicks done by local users
 100                 ModResult res;
 101                 FIRST_MOD_RESULT(OnUserPreKick, res, (user, memb, reason));
 102                 if (res == MOD_RES_DENY)
 103                         return CMD_FAILURE;
 104
 105                 if (res == MOD_RES_PASSTHRU)
 106                 {
 107                         unsigned int them = srcmemb->getRank();
 108                         unsigned int req = HALFOP_VALUE;
 109                         for (std::string::size_type i = 0; i < memb->modes.length(); i++)
 110                         {
 111                                 ModeHandler* mh = ServerInstance->Modes->FindMode(memb->modes[i], MODETYPE_CHANNEL);
 112                                 if (mh && mh->GetLevelRequired(true) > req)
 113                                         req = mh->GetLevelRequired(true);
 114                         }
 115
 116                         if (them < req)
 117                         {
 118                                 user->WriteNumeric(ERR_CHANOPRIVSNEEDED, c->name, InspIRCd::Format("You must be a channel %soperator",
 119                                         req > HALFOP_VALUE ? "" : "half-"));
 120                                 return CMD_FAILURE;
 121                         }
 122                 }
 123         }
 124
 125         c->KickUser(user, victimiter, reason);
 126
 127         return CMD_SUCCESS;
 128 }
 129
 130 RouteDescriptor CommandKick::GetRouting(User* user, const std::vector<std::string>& parameters)
 131 {
 132         return (IS_LOCAL(user) ? ROUTE_LOCALONLY : ROUTE_BROADCAST);
 133 }