src/modules/m_cban.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15
  16 /* $ModDesc: Gives /cban, aka C:lines. Think Q:lines, for channels. */
  17
  18 /** Holds a CBAN item
  19  */
  20 class CBan : public classbase
  21 {
  22 public:
  23         irc::string chname;
  24         std::string set_by;
  25         time_t set_on;
  26         long length;
  27         std::string reason;
  28
  29         CBan()
  30         {
  31         }
  32
  33         CBan(irc::string cn, std::string sb, time_t so, long ln, std::string rs) : chname(cn), set_by(sb), set_on(so), length(ln), reason(rs)
  34         {
  35         }
  36 };
  37
  38 bool CBanComp(const CBan &ban1, const CBan &ban2);
  39
  40 typedef std::vector<CBan> cbanlist;
  41
  42 /* cbans is declared here, as our type is right above. Don't try move it. */
  43 cbanlist cbans;
  44
  45 /** Handle /CBAN
  46  */
  47 class CommandCban : public Command
  48 {
  49  public:
  50         CommandCban(InspIRCd* Me) : Command(Me, "CBAN", 'o', 1)
  51         {
  52                 this->source = "m_cban.so";
  53                 this->syntax = "<channel> [<duration> :<reason>]";
  54                 TRANSLATE4(TR_TEXT,TR_TEXT,TR_TEXT,TR_END);
  55         }
  56
  57         CmdResult Handle(const char** parameters, int pcnt, User *user)
  58         {
  59                 /* syntax: CBAN #channel time :reason goes here */
  60                 /* 'time' is a human-readable timestring, like 2d3h2s. */
  61
  62                 if(pcnt == 1)
  63                 {
  64                         /* form: CBAN #channel removes a CBAN */
  65                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
  66                         {
  67                                 if (parameters[0] == iter->chname)
  68                                 {
  69                                         long remaining = iter->length + ServerInstance->Time();
  70                                         user->WriteServ("386 %s %s :Removed CBAN due to expire at %s (%s)", user->nick, iter->chname.c_str(), ServerInstance->TimeString(remaining).c_str(), iter->reason.c_str());
  71                                         cbans.erase(iter);
  72                                         break;
  73                                 }
  74                         }
  75                 }
  76                 else if (pcnt >= 2)
  77                 {
  78                         /* full form to add a CBAN */
  79                         if (ServerInstance->IsChannel(parameters[0]))
  80                         {
  81                                 // parameters[0] = #channel
  82                                 // parameters[1] = 1h3m2s
  83                                 // parameters[2] = Tortoise abuser
  84                                 long length = ServerInstance->Duration(parameters[1]);
  85                                 std::string reason = (pcnt > 2) ? parameters[2] : "No reason supplied";
  86
  87                                 cbans.push_back(CBan(parameters[0], user->nick, ServerInstance->Time(), length, reason));
  88
  89                                 std::sort(cbans.begin(), cbans.end(), CBanComp);
  90
  91                                 if(length > 0)
  92                                 {
  93                                         user->WriteServ("385 %s %s :Added %lu second channel ban (%s)", user->nick, parameters[0], length, reason.c_str());
  94                                         ServerInstance->WriteOpers("*** %s added %lu second channel ban on %s (%s)", user->nick, length, parameters[0], reason.c_str());
  95                                 }
  96                                 else
  97                                 {
  98                                         user->WriteServ("385 %s %s :Added permanent channel ban (%s)", user->nick, parameters[0], reason.c_str());
  99                                         ServerInstance->WriteOpers("*** %s added permanent channel ban on %s (%s)", user->nick, parameters[0], reason.c_str());
 100                                 }
 101                         }
 102                         else
 103                         {
 104                                 user->WriteServ("403 %s %s :Invalid channel name", user->nick, parameters[0]);
 105                                 return CMD_FAILURE;
 106                         }
 107                 }
 108
 109                 /* we want this routed! */
 110                 return CMD_SUCCESS;
 111         }
 112 };
 113
 114 bool CBanComp(const CBan &ban1, const CBan &ban2)
 115 {
 116         return ((ban1.set_on + ban1.length) < (ban2.set_on + ban2.length));
 117 }
 118
 119 class ModuleCBan : public Module
 120 {
 121         CommandCban* mycommand;
 122
 123
 124  public:
 125         ModuleCBan(InspIRCd* Me) : Module(Me)
 126         {
 127
 128                 mycommand = new CommandCban(Me);
 129                 ServerInstance->AddCommand(mycommand);
 130                 Implementation eventlist[] = { I_OnUserPreJoin, I_OnSyncOtherMetaData, I_OnDecodeMetaData, I_OnStats };
 131                 ServerInstance->Modules->Attach(eventlist, this, 4);
 132         }
 133
 134
 135         virtual int OnStats(char symbol, User* user, string_list &results)
 136         {
 137                 ExpireBans();
 138
 139                 if(symbol == 'C')
 140                 {
 141                         for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 142                         {
 143                                 unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
 144                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 210 "+user->nick+" "+iter->chname.c_str()+" "+iter->set_by+" "+ConvToStr(iter->set_on)+" "+ConvToStr(iter->length)+" "+ConvToStr(remaining)+" :"+iter->reason);
 145                         }
 146                 }
 147
 148                 return 0;
 149         }
 150
 151         virtual int OnUserPreJoin(User *user, Channel *chan, const char *cname, std::string &privs)
 152         {
 153                 ExpireBans();
 154
 155                 /* check cbans in here, and apply as necessary. */
 156                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 157                 {
 158                         if(iter->chname == cname && !user->modes[UM_OPERATOR])
 159                         {
 160                                 // Channel is banned.
 161                                 user->WriteServ( "384 %s %s :Cannot join channel, CBANed (%s)", user->nick, cname, iter->reason.c_str());
 162                                 ServerInstance->WriteOpers("*** %s tried to join %s which is CBANed (%s)", user->nick, cname, iter->reason.c_str());
 163                                 return 1;
 164                         }
 165                 }
 166                 return 0;
 167         }
 168
 169         virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable)
 170         {
 171                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 172                 {
 173                         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "cban", EncodeCBan(*iter));
 174                 }
 175         }
 176
 177         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 178         {
 179                 if((target_type == TYPE_OTHER) && (extname == "cban"))
 180                 {
 181                         cbans.push_back(DecodeCBan(extdata));
 182                         std::sort(cbans.begin(), cbans.end(), CBanComp);
 183                 }
 184         }
 185
 186         virtual ~ModuleCBan()
 187         {
 188         }
 189
 190         virtual Version GetVersion()
 191         {
 192                 return Version(1, 1, 0, 1, VF_COMMON | VF_VENDOR, API_VERSION);
 193         }
 194
 195         std::string EncodeCBan(const CBan &ban)
 196         {
 197                 std::ostringstream stream;
 198                 stream << ban.chname << " " << ban.set_by << " " << ban.set_on << " " << ban.length << " :" << ban.reason;
 199                 return stream.str();
 200         }
 201
 202         CBan DecodeCBan(const std::string &data)
 203         {
 204                 CBan res;
 205                 int set_on;
 206                 irc::tokenstream tokens(data);
 207                 tokens.GetToken(res.chname);
 208                 tokens.GetToken(res.set_by);
 209                 tokens.GetToken(set_on);
 210                 res.set_on = set_on;
 211                 tokens.GetToken(res.length);
 212                 tokens.GetToken(res.reason);
 213                 return res;
 214         }
 215
 216         void ExpireBans()
 217         {
 218                 bool go_again = true;
 219
 220                 while (go_again)
 221                 {
 222                         go_again = false;
 223
 224                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 225                         {
 226                                 /* 0 == permanent, don't mess with them! -- w00t */
 227                                 if (iter->length != 0)
 228                                 {
 229                                         if (iter->set_on + iter->length <= ServerInstance->Time())
 230                                         {
 231                                                 ServerInstance->WriteOpers("*** %li second CBAN on %s (%s) set on %s expired", iter->length, iter->chname.c_str(), iter->reason.c_str(), ServerInstance->TimeString(iter->set_on).c_str());
 232                                                 cbans.erase(iter);
 233                                                 go_again = true;
 234                                         }
 235                                 }
 236
 237                                 if (go_again == true)
 238                                         break;
 239                         }
 240                 }
 241         }
 242 };
 243
 244 MODULE_INIT(ModuleCBan)
 245