src/modules/m_shun.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
   7  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   8  *
   9  * This file is part of InspIRCd.  InspIRCd is free software: you can
  10  * redistribute it and/or modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation, version 2.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22
  23 #include "inspircd.h"
  24 #include "xline.h"
  25
  26 /* $ModDesc: Provides the /SHUN command, which stops a user from executing all except configured commands. */
  27
  28 class Shun : public XLine
  29 {
  30 public:
  31         std::string matchtext;
  32
  33         Shun(time_t s_time, long d, std::string src, std::string re, std::string shunmask)
  34                 : XLine(s_time, d, src, re, "SHUN")
  35         {
  36                 this->matchtext = shunmask;
  37         }
  38
  39         bool Matches(User *u)
  40         {
  41                 // E: overrides shun
  42                 LocalUser* lu = IS_LOCAL(u);
  43                 if (lu && lu->exempt)
  44                         return false;
  45
  46                 if (InspIRCd::Match(u->GetFullHost(), matchtext) || InspIRCd::Match(u->GetFullRealHost(), matchtext) || InspIRCd::Match(u->nick+"!"+u->ident+"@"+u->GetIPString(), matchtext))
  47                         return true;
  48
  49                 return false;
  50         }
  51
  52         bool Matches(const std::string &s)
  53         {
  54                 if (matchtext == s)
  55                         return true;
  56                 return false;
  57         }
  58
  59         void DisplayExpiry()
  60         {
  61                 ServerInstance->SNO->WriteToSnoMask('x',"Removing expired shun %s (set by %s %ld seconds ago)",
  62                         this->matchtext.c_str(), this->source.c_str(), (long int)(ServerInstance->Time() - this->set_time));
  63         }
  64
  65         const char* Displayable()
  66         {
  67                 return matchtext.c_str();
  68         }
  69 };
  70
  71 /** An XLineFactory specialized to generate shun pointers
  72  */
  73 class ShunFactory : public XLineFactory
  74 {
  75  public:
  76         ShunFactory() : XLineFactory("SHUN") { }
  77
  78         /** Generate a shun
  79         */
  80         XLine* Generate(time_t set_time, long duration, std::string source, std::string reason, std::string xline_specific_mask)
  81         {
  82                 return new Shun(set_time, duration, source, reason, xline_specific_mask);
  83         }
  84
  85         bool AutoApplyToUserList(XLine *x)
  86         {
  87                 return false;
  88         }
  89 };
  90
  91 //typedef std::vector<Shun> shunlist;
  92
  93 class CommandShun : public Command
  94 {
  95  public:
  96         CommandShun(Module* Creator) : Command(Creator, "SHUN", 1, 3)
  97         {
  98                 flags_needed = 'o'; this->syntax = "<nick!user@hostmask> [<shun-duration>] :<reason>";
  99         }
 100
 101         CmdResult Handle(const std::vector<std::string>& parameters, User *user)
 102         {
 103                 /* syntax: SHUN nick!user@host time :reason goes here */
 104                 /* 'time' is a human-readable timestring, like 2d3h2s. */
 105
 106                 std::string target = parameters[0];
 107
 108                 User *find = ServerInstance->FindNick(target);
 109                 if ((find) && (find->registered == REG_ALL))
 110                         target = std::string("*!*@") + find->GetIPString();
 111
 112                 if (parameters.size() == 1)
 113                 {
 114                         if (ServerInstance->XLines->DelLine(target.c_str(), "SHUN", user))
 115                         {
 116                                 ServerInstance->SNO->WriteToSnoMask('x',"%s removed SHUN on %s",user->nick.c_str(),target.c_str());
 117                         }
 118                         else
 119                         {
 120                                 user->WriteServ("NOTICE %s :*** Shun %s not found in list, try /stats H.",user->nick.c_str(),target.c_str());
 121                                 return CMD_FAILURE;
 122                         }
 123                 }
 124                 else
 125                 {
 126                         // Adding - XXX todo make this respect <insane> tag perhaps..
 127                         unsigned long duration;
 128                         std::string expr;
 129                         if (parameters.size() > 2)
 130                         {
 131                                 duration = InspIRCd::Duration(parameters[1]);
 132                                 expr = parameters[2];
 133                         }
 134                         else
 135                         {
 136                                 duration = 0;
 137                                 expr = parameters[1];
 138                         }
 139
 140                         Shun* r = new Shun(ServerInstance->Time(), duration, user->nick.c_str(), expr.c_str(), target.c_str());
 141                         if (ServerInstance->XLines->AddLine(r, user))
 142                         {
 143                                 if (!duration)
 144                                 {
 145                                         ServerInstance->SNO->WriteToSnoMask('x',"%s added permanent SHUN for %s: %s",
 146                                                 user->nick.c_str(), target.c_str(), expr.c_str());
 147                                 }
 148                                 else
 149                                 {
 150                                         time_t c_requires_crap = duration + ServerInstance->Time();
 151                                         std::string timestr = ServerInstance->TimeString(c_requires_crap);
 152                                         ServerInstance->SNO->WriteToSnoMask('x', "%s added timed SHUN for %s to expire on %s: %s",
 153                                                 user->nick.c_str(), target.c_str(), timestr.c_str(), expr.c_str());
 154                                 }
 155                         }
 156                         else
 157                         {
 158                                 delete r;
 159                                 user->WriteServ("NOTICE %s :*** Shun for %s already exists", user->nick.c_str(), target.c_str());
 160                                 return CMD_FAILURE;
 161                         }
 162                 }
 163                 return CMD_SUCCESS;
 164         }
 165
 166         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
 167         {
 168                 if (IS_LOCAL(user))
 169                         return ROUTE_LOCALONLY; // spanningtree will send ADDLINE
 170
 171                 return ROUTE_BROADCAST;
 172         }
 173 };
 174
 175 class ModuleShun : public Module
 176 {
 177         CommandShun cmd;
 178         ShunFactory f;
 179         std::set<std::string> ShunEnabledCommands;
 180         bool NotifyOfShun;
 181         bool affectopers;
 182
 183  public:
 184         ModuleShun() : cmd(this)
 185         {
 186         }
 187
 188         void init()
 189         {
 190                 ServerInstance->XLines->RegisterFactory(&f);
 191                 ServerInstance->Modules->AddService(cmd);
 192
 193                 Implementation eventlist[] = { I_OnStats, I_OnPreCommand, I_OnRehash };
 194                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 195                 OnRehash(NULL);
 196         }
 197
 198         virtual ~ModuleShun()
 199         {
 200                 ServerInstance->XLines->DelAll("SHUN");
 201                 ServerInstance->XLines->UnregisterFactory(&f);
 202         }
 203
 204         void Prioritize()
 205         {
 206                 Module* alias = ServerInstance->Modules->Find("m_alias.so");
 207                 ServerInstance->Modules->SetPriority(this, I_OnPreCommand, PRIORITY_BEFORE, &alias);
 208         }
 209
 210         virtual ModResult OnStats(char symbol, User* user, string_list& out)
 211         {
 212                 if (symbol != 'H')
 213                         return MOD_RES_PASSTHRU;
 214
 215                 ServerInstance->XLines->InvokeStats("SHUN", 223, user, out);
 216                 return MOD_RES_DENY;
 217         }
 218
 219         virtual void OnRehash(User* user)
 220         {
 221                 ConfigTag* tag = ServerInstance->Config->ConfValue("shun");
 222                 std::string cmds = tag->getString("enabledcommands");
 223                 std::transform(cmds.begin(), cmds.end(), cmds.begin(), ::toupper);
 224
 225                 if (cmds.empty())
 226                         cmds = "PING PONG QUIT";
 227
 228                 ShunEnabledCommands.clear();
 229
 230                 std::stringstream dcmds(cmds);
 231                 std::string thiscmd;
 232
 233                 while (dcmds >> thiscmd)
 234                 {
 235                         ShunEnabledCommands.insert(thiscmd);
 236                 }
 237
 238                 NotifyOfShun = tag->getBool("notifyuser", true);
 239                 affectopers = tag->getBool("affectopers", false);
 240         }
 241
 242         virtual ModResult OnPreCommand(std::string &command, std::vector<std::string>& parameters, LocalUser* user, bool validated, const std::string &original_line)
 243         {
 244                 if (validated)
 245                         return MOD_RES_PASSTHRU;
 246
 247                 if (!ServerInstance->XLines->MatchesLine("SHUN", user))
 248                 {
 249                         /* Not shunned, don't touch. */
 250                         return MOD_RES_PASSTHRU;
 251                 }
 252
 253                 if (!affectopers && IS_OPER(user))
 254                 {
 255                         /* Don't do anything if the user is an operator and affectopers isn't set */
 256                         return MOD_RES_PASSTHRU;
 257                 }
 258
 259                 std::set<std::string>::iterator i = ShunEnabledCommands.find(command);
 260
 261                 if (i == ShunEnabledCommands.end())
 262                 {
 263                         if (NotifyOfShun)
 264                                 user->WriteServ("NOTICE %s :*** Command %s not processed, as you have been blocked from issuing commands (SHUN)", user->nick.c_str(), command.c_str());
 265                         return MOD_RES_DENY;
 266                 }
 267
 268                 if (command == "QUIT")
 269                 {
 270                         /* Allow QUIT but dont show any quit message */
 271                         parameters.clear();
 272                 }
 273                 else if ((command == "PART") && (parameters.size() > 1))
 274                 {
 275                         /* same for PART */
 276                         parameters[1].clear();
 277                 }
 278
 279                 /* if we're here, allow the command. */
 280                 return MOD_RES_PASSTHRU;
 281         }
 282
 283         virtual Version GetVersion()
 284         {
 285                 return Version("Provides the /SHUN command, which stops a user from executing all except configured commands.",VF_VENDOR|VF_COMMON);
 286         }
 287 };
 288
 289 MODULE_INIT(ModuleShun)