include/u_listmode.h

   1 #ifndef INSPIRCD_LISTMODE_PROVIDER
   2 #define INSPIRCD_LISTMODE_PROVIDER
   3
   4 #include <stdio.h>
   5 #include <string>
   6 #include <sstream>
   7 #include <vector>
   8 #include "users.h"
   9 #include "channels.h"
  10 #include "modules.h"
  11
  12 #include "wildcard.h"
  13 #include "inspircd.h"
  14
  15 /* $ModDesc: Provides support for easily creating listmodes, stores the time set, the user, and a parameter. */
  16
  17 /* Updated to use the <banlist> config tag if it exists */
  18 /* Written by Om <omster@gmail.com>, December 2005. */
  19 /* Based on code previously written by Om - April 2005 */
  20 /* Updated to new API July 8th 2006 by Brain */
  21 /* Originally based on m_chanprotect and m_silence */
  22
  23 inline std::string stringtime()
  24 {
  25         std::ostringstream TIME;
  26         TIME << time(NULL);
  27         return TIME.str();
  28 }
  29
  30 class ListItem : public classbase
  31 {
  32 public:
  33         std::string nick;
  34         std::string mask;
  35         std::string time;
  36 };
  37
  38 class ListLimit : public classbase
  39 {
  40 public:
  41         std::string mask;
  42         unsigned int limit;
  43 };
  44
  45 // Just defining the type we use for the exception list here...
  46 typedef std::vector<ListItem> modelist;
  47 typedef std::vector<ListLimit> limitlist;
  48
  49 class ListModeBase : public ModeHandler
  50 {
  51  protected:
  52         std::string infokey;
  53         std::string listnumeric;
  54         std::string endoflistnumeric;
  55         std::string endofliststring;
  56         bool tidy;
  57         std::string configtag;
  58         limitlist chanlimits;
  59
  60  public:
  61         ListModeBase(InspIRCd* Instance, char modechar, const std::string &eolstr, const std::string &lnum, const std::string &eolnum, bool autotidy, const std::string &ctag = "banlist")
  62         : ModeHandler(Instance, modechar, 1, 1, true, MODETYPE_CHANNEL, false), listnumeric(lnum), endoflistnumeric(eolnum), endofliststring(eolstr), tidy(autotidy), configtag(ctag)
  63         {
  64                 this->DoRehash();
  65                 infokey = "exceptionbase_mode_" + std::string(1, mode) + "_list";
  66         }
  67
  68         std::pair<bool,std::string> ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
  69         {
  70                 modelist* el;
  71                 channel->GetExt(infokey, el);
  72                 if (el)
  73                 {
  74                         for (modelist::iterator it = el->begin(); it != el->end(); it++)
  75                         {
  76                                 if(parameter == it->mask)
  77                                 {
  78                                         return std::make_pair(true, parameter);
  79                                 }
  80                         }
  81                 }
  82                 return std::make_pair(false, parameter);
  83         }
  84
  85         virtual void DisplayList(userrec* user, chanrec* channel)
  86         {
  87                 modelist* el;
  88                 channel->GetExt(infokey, el);
  89                 if (el)
  90                 {
  91                         for(modelist::iterator it = el->begin(); it != el->end(); it++)
  92                         {
  93                                 user->WriteServ("%s %s %s %s %s %s", listnumeric.c_str(), user->nick, channel->name, it->mask.c_str(), it->nick.c_str(), it->time.c_str());
  94                         }
  95                 }
  96                 user->WriteServ("%s %s %s %s", endoflistnumeric.c_str(), user->nick, channel->name, endofliststring.c_str());
  97         }
  98
  99         virtual void RemoveMode(chanrec* channel)
 100         {
 101                 ServerInstance->Log(DEBUG,"Removing listmode base from %s %s",channel->name,infokey.c_str());
 102                 modelist* el;
 103                 channel->GetExt(infokey, el);
 104                 if (el)
 105                 {
 106                         ServerInstance->Log(DEBUG,"Channel is extended with a list");
 107                         char moderemove[MAXBUF];
 108                         userrec* n = new userrec(ServerInstance);
 109                         n->SetFd(FD_MAGIC_NUMBER);
 110                         modelist copy;
 111                         /* Make a copy of it, because we cant change the list whilst iterating over it */
 112                         for(modelist::iterator it = el->begin(); it != el->end(); it++)
 113                         {
 114                                 copy.push_back(*it);
 115                         }
 116                         for(modelist::iterator it = copy.begin(); it != copy.end(); it++)
 117                         {
 118                                 ServerInstance->Log(DEBUG,"Remove item %s",it->mask.c_str());
 119                                 sprintf(moderemove,"-%c",this->GetModeChar());
 120                                 const char* parameters[] = { channel->name, moderemove, it->mask.c_str() };
 121                                 ServerInstance->SendMode(parameters, 3, n);
 122                         }
 123                         delete n;
 124                 }
 125         }
 126
 127         virtual void RemoveMode(userrec* user)
 128         {
 129                 /* Listmodes dont get set on users */
 130         }
 131
 132         virtual void DoRehash()
 133         {
 134                 ConfigReader Conf(ServerInstance);
 135
 136                 chanlimits.clear();
 137
 138                 for(int i = 0; i < Conf.Enumerate(configtag); i++)
 139                 {
 140                         // For each <banlist> tag
 141                         ListLimit limit;
 142                         limit.mask = Conf.ReadValue(configtag, "chan", i);
 143                         limit.limit = Conf.ReadInteger(configtag, "limit", i, true);
 144
 145                         if(limit.mask.size() && limit.limit > 0)
 146                                 chanlimits.push_back(limit);
 147                 }
 148                 if(chanlimits.size() == 0)
 149                 {
 150                         ListLimit limit;
 151                         limit.mask = "*";
 152                         limit.limit = 64;
 153                         chanlimits.push_back(limit);
 154                 }
 155         }
 156
 157         virtual void DoImplements(char* List)
 158         {
 159                 List[I_OnChannelDelete] = List[I_OnSyncChannel] = List[I_OnCleanup] = List[I_OnRehash] = 1;
 160         }
 161
 162         virtual ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 163         {
 164                 // Try and grab the list
 165                 modelist* el;
 166                 channel->GetExt(infokey, el);
 167
 168                 if (adding)
 169                 {
 170                         // If there was no list
 171                         if (!el)
 172                         {
 173                                 // Make one
 174                                 el = new modelist;
 175                                 channel->Extend(infokey, el);
 176                         }
 177
 178                         // Clean the mask up
 179                         if (this->tidy)
 180                                 ModeParser::CleanMask(parameter);
 181
 182                         // Check if the item already exists in the list
 183                         for (modelist::iterator it = el->begin(); it != el->end(); it++)
 184                         {
 185                                 if(parameter == it->mask)
 186                                 {
 187                                         /* Give a subclass a chance to error about this */
 188                                         TellAlreadyOnList(source, channel, parameter);
 189
 190                                         // it does, deny the change
 191                                         return MODEACTION_DENY;
 192                                 }
 193                         }
 194
 195                         unsigned int maxsize = 0;
 196
 197                         for (limitlist::iterator it = chanlimits.begin(); it != chanlimits.end(); it++)
 198                         {
 199                                 if (match(channel->name, it->mask.c_str()))
 200                                 {
 201                                         // We have a pattern matching the channel...
 202                                         maxsize = el->size();
 203                                         if (maxsize < it->limit)
 204                                         {
 205                                                 /* Ok, it *could* be allowed, now give someone subclassing us
 206                                                  * a chance to validate the parameter.
 207                                                  * The param is passed by reference, so they can both modify it
 208                                                  * and tell us if we allow it or not.
 209                                                  *
 210                                                  * eg, the subclass could:
 211                                                  * 1) allow
 212                                                  * 2) 'fix' parameter and then allow
 213                                                  * 3) deny
 214                                                  */
 215                                                 if(ValidateParam(source, channel, parameter))
 216                                                 {
 217                                                         // And now add the mask onto the list...
 218                                                         ListItem e;
 219                                                         e.mask = parameter;
 220                                                         e.nick = source->nick;
 221                                                         e.time = stringtime();
 222
 223                                                         el->push_back(e);
 224                                                         return MODEACTION_ALLOW;
 225                                                 }
 226                                                 else
 227                                                 {
 228                                                         /* If they deny it they have the job of giving an error message */
 229                                                         return MODEACTION_DENY;
 230                                                 }
 231                                         }
 232                                 }
 233                         }
 234
 235                         /* List is full, give subclass a chance to send a custom message */
 236                         if(!TellListTooLong(source, channel, parameter))
 237                         {
 238                                 source->WriteServ("478 %s %s %s :Channel ban/ignore list is full", source->nick, channel->name, parameter.c_str());
 239                         }
 240
 241                         parameter = "";
 242                         return MODEACTION_DENY;
 243                 }
 244                 else
 245                 {
 246                         // We're taking the mode off
 247                         if (el)
 248                         {
 249                                 for (modelist::iterator it = el->begin(); it != el->end(); it++)
 250                                 {
 251                                         if(parameter == it->mask)
 252                                         {
 253                                                 el->erase(it);
 254                                                 if(el->size() == 0)
 255                                                 {
 256                                                         channel->Shrink(infokey);
 257                                                         delete el;
 258                                                 }
 259                                                 return MODEACTION_ALLOW;
 260                                         }
 261                                 }
 262                                 /* Tried to remove something that wasn't set */
 263                                 TellNotSet(source, channel, parameter);
 264                                 parameter = "";
 265                                 return MODEACTION_DENY;
 266                         }
 267                         else
 268                         {
 269                                 /* Hmm, taking an exception off a non-existant list, DIE */
 270                                 TellNotSet(source, channel, parameter);
 271                                 parameter = "";
 272                                 return MODEACTION_DENY;
 273                         }
 274                 }
 275                 return MODEACTION_DENY;
 276         }
 277
 278         virtual std::string& GetInfoKey()
 279         {
 280                 return infokey;
 281         }
 282
 283         virtual void DoChannelDelete(chanrec* chan)
 284         {
 285                 modelist* list;
 286                 chan->GetExt(infokey, list);
 287
 288                 if (list)
 289                 {
 290                         chan->Shrink(infokey);
 291                         delete list;
 292                 }
 293         }
 294
 295         virtual void DoSyncChannel(chanrec* chan, Module* proto, void* opaque)
 296         {
 297                 modelist* list;
 298                 chan->GetExt(infokey, list);
 299                 if (list)
 300                 {
 301                         for (modelist::iterator it = list->begin(); it != list->end(); it++)
 302                         {
 303                                 proto->ProtoSendMode(opaque, TYPE_CHANNEL, chan, "+" + std::string(1, mode) + " " + it->mask);
 304                         }
 305                 }
 306         }
 307
 308         virtual void DoCleanup(int target_type, void* item)
 309         {
 310         }
 311
 312         virtual bool ValidateParam(userrec* source, chanrec* channel, std::string &parameter)
 313         {
 314                 return true;
 315         }
 316
 317         virtual bool TellListTooLong(userrec* source, chanrec* channel, std::string &parameter)
 318         {
 319                 return false;
 320         }
 321
 322         virtual void TellAlreadyOnList(userrec* source, chanrec* channel, std::string &parameter)
 323         {
 324         }
 325
 326         virtual void TellNotSet(userrec* source, chanrec* channel, std::string &parameter)
 327         {
 328
 329         }
 330 };
 331
 332 #endif