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 #include <algorithm>
  16 #include "users.h"
  17 #include "channels.h"
  18 #include "modules.h"
  19 #include "configreader.h"
  20
  21 /* $ModDesc: Gives /cban, aka C:lines. Think Q:lines, for channels. */
  22
  23 /** Holds a CBAN item
  24  */
  25 class CBan : public classbase
  26 {
  27 public:
  28         irc::string chname;
  29         std::string set_by;
  30         time_t set_on;
  31         long length;
  32         std::string reason;
  33
  34         CBan()
  35         {
  36         }
  37
  38         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)
  39         {
  40         }
  41 };
  42
  43 bool CBanComp(const CBan &ban1, const CBan &ban2);
  44
  45 typedef std::vector<CBan> cbanlist;
  46
  47 /* cbans is declared here, as our type is right above. Don't try move it. */
  48 cbanlist cbans;
  49
  50 /** Handle /CBAN
  51  */
  52 class cmd_cban : public command_t
  53 {
  54  public:
  55         cmd_cban(InspIRCd* Me) : command_t(Me, "CBAN", 'o', 1)
  56         {
  57                 this->source = "m_cban.so";
  58                 this->syntax = "<channel> [<duration> :<reason>]";
  59         }
  60
  61         CmdResult Handle(const char** parameters, int pcnt, userrec *user)
  62         {
  63                 /* syntax: CBAN #channel time :reason goes here */
  64                 /* 'time' is a human-readable timestring, like 2d3h2s. */
  65
  66                 if(pcnt == 1)
  67                 {
  68                         /* form: CBAN #channel removes a CBAN */
  69                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
  70                         {
  71                                 if (parameters[0] == iter->chname)
  72                                 {
  73                                         long remaining = iter->length + ServerInstance->Time();
  74                                         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());
  75                                         cbans.erase(iter);
  76                                         break;
  77                                 }
  78                         }
  79                 }
  80                 else if (pcnt >= 2)
  81                 {
  82                         /* full form to add a CBAN */
  83                         if (ServerInstance->IsChannel(parameters[0]))
  84                         {
  85                                 // parameters[0] = #channel
  86                                 // parameters[1] = 1h3m2s
  87                                 // parameters[2] = Tortoise abuser
  88                                 long length = ServerInstance->Duration(parameters[1]);
  89                                 std::string reason = (pcnt > 2) ? parameters[2] : "No reason supplied";
  90
  91                                 cbans.push_back(CBan(parameters[0], user->nick, ServerInstance->Time(), length, reason));
  92
  93                                 std::sort(cbans.begin(), cbans.end(), CBanComp);
  94
  95                                 if(length > 0)
  96                                 {
  97                                         user->WriteServ("385 %s %s :Added %lu second channel ban (%s)", user->nick, parameters[0], length, reason.c_str());
  98                                         ServerInstance->WriteOpers("*** %s added %lu second channel ban on %s (%s)", user->nick, length, parameters[0], reason.c_str());
  99                                 }
 100                                 else
 101                                 {
 102                                         user->WriteServ("385 %s %s :Added permanent channel ban (%s)", user->nick, parameters[0], reason.c_str());
 103                                         ServerInstance->WriteOpers("*** %s added permanent channel ban on %s (%s)", user->nick, parameters[0], reason.c_str());
 104                                 }
 105                         }
 106                         else
 107                         {
 108                                 user->WriteServ("403 %s %s :Invalid channel name", user->nick, parameters[0]);
 109                                 return CMD_FAILURE;
 110                         }
 111                 }
 112
 113                 /* we want this routed! */
 114                 return CMD_SUCCESS;
 115         }
 116 };
 117
 118 bool CBanComp(const CBan &ban1, const CBan &ban2)
 119 {
 120         return ((ban1.set_on + ban1.length) < (ban2.set_on + ban2.length));
 121 }
 122
 123 class ModuleCBan : public Module
 124 {
 125         cmd_cban* mycommand;
 126
 127
 128  public:
 129         ModuleCBan(InspIRCd* Me) : Module(Me)
 130         {
 131
 132                 mycommand = new cmd_cban(Me);
 133                 ServerInstance->AddCommand(mycommand);
 134         }
 135
 136         void Implements(char* List)
 137         {
 138                 List[I_OnUserPreJoin] = List[I_OnSyncOtherMetaData] = List[I_OnDecodeMetaData] = List[I_OnStats] = 1;
 139         }
 140
 141         virtual int OnStats(char symbol, userrec* user, string_list &results)
 142         {
 143                 ExpireBans();
 144
 145                 if(symbol == 'C')
 146                 {
 147                         for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 148                         {
 149                                 unsigned long remaining = (iter->set_on + iter->length) - ServerInstance->Time();
 150                                 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);
 151                         }
 152                 }
 153
 154                 return 0;
 155         }
 156
 157         virtual int OnUserPreJoin(userrec *user, chanrec *chan, const char *cname, std::string &privs)
 158         {
 159                 ExpireBans();
 160
 161                 /* check cbans in here, and apply as necessary. */
 162                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 163                 {
 164                         if(iter->chname == cname && !user->modes[UM_OPERATOR])
 165                         {
 166                                 // Channel is banned.
 167                                 user->WriteServ( "384 %s %s :Cannot join channel, CBANed (%s)", user->nick, cname, iter->reason.c_str());
 168                                 ServerInstance->WriteOpers("*** %s tried to join %s which is CBANed (%s)", user->nick, cname, iter->reason.c_str());
 169                                 return 1;
 170                         }
 171                 }
 172                 return 0;
 173         }
 174
 175         virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable)
 176         {
 177                 for(cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 178                 {
 179                         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "cban", EncodeCBan(*iter));
 180                 }
 181         }
 182
 183         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 184         {
 185                 if((target_type == TYPE_OTHER) && (extname == "cban"))
 186                 {
 187                         cbans.push_back(DecodeCBan(extdata));
 188                         std::sort(cbans.begin(), cbans.end(), CBanComp);
 189                 }
 190         }
 191
 192         virtual ~ModuleCBan()
 193         {
 194         }
 195
 196         virtual Version GetVersion()
 197         {
 198                 return Version(1,1,0,1,VF_VENDOR,API_VERSION);
 199         }
 200
 201         std::string EncodeCBan(const CBan &ban)
 202         {
 203                 std::ostringstream stream;
 204                 stream << ban.chname << " " << ban.set_by << " " << ban.set_on << " " << ban.length << " :" << ban.reason;
 205                 return stream.str();
 206         }
 207
 208         CBan DecodeCBan(const std::string &data)
 209         {
 210                 CBan res;
 211                 int set_on;
 212                 irc::tokenstream tokens(data);
 213                 tokens.GetToken(res.chname);
 214                 tokens.GetToken(res.set_by);
 215                 tokens.GetToken(set_on);
 216                 res.set_on = set_on;
 217                 tokens.GetToken(res.length);
 218                 tokens.GetToken(res.reason);
 219                 return res;
 220         }
 221
 222         void ExpireBans()
 223         {
 224                 bool go_again = true;
 225
 226                 while (go_again)
 227                 {
 228                         go_again = false;
 229
 230                         for (cbanlist::iterator iter = cbans.begin(); iter != cbans.end(); iter++)
 231                         {
 232                                 /* 0 == permanent, don't mess with them! -- w00t */
 233                                 if (iter->length != 0)
 234                                 {
 235                                         if (iter->set_on + iter->length <= ServerInstance->Time())
 236                                         {
 237                                                 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());
 238                                                 cbans.erase(iter);
 239                                                 go_again = true;
 240                                         }
 241                                 }
 242
 243                                 if (go_again == true)
 244                                         break;
 245                         }
 246                 }
 247         }
 248 };
 249
 250 MODULE_INIT(ModuleCBan);
 251