src/modules/m_filter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 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 "xline.h"
  16 #include "m_regex.h"
  17
  18 /* $ModDesc: Text (spam) filtering */
  19
  20 static std::string RegexEngine = "";
  21 static Module* rxengine = NULL;
  22
  23 enum FilterFlags
  24 {
  25         FLAG_PART = 2,
  26         FLAG_QUIT = 4,
  27         FLAG_PRIVMSG = 8,
  28         FLAG_NOTICE = 16
  29 };
  30
  31 class FilterResult : public classbase
  32 {
  33  public:
  34         std::string freeform;
  35         std::string reason;
  36         std::string action;
  37         long gline_time;
  38         std::string flags;
  39
  40         bool flag_no_opers;
  41         bool flag_part_message;
  42         bool flag_quit_message;
  43         bool flag_privmsg;
  44         bool flag_notice;
  45
  46         FilterResult(const std::string free, const std::string &rea, const std::string &act, long gt, const std::string &fla) :
  47                         freeform(free), reason(rea), action(act), gline_time(gt), flags(fla)
  48         {
  49                 this->FillFlags(fla);
  50         }
  51
  52         int FillFlags(const std::string &fl)
  53         {
  54                 flags = fl;
  55                 flag_no_opers = flag_part_message = flag_quit_message = flag_privmsg = flag_notice = false;
  56                 size_t x = 0;
  57
  58                 for (std::string::const_iterator n = flags.begin(); n != flags.end(); ++n, ++x)
  59                 {
  60                         switch (*n)
  61                         {
  62                                 case 'o':
  63                                         flag_no_opers = true;
  64                                 break;
  65                                 case 'P':
  66                                         flag_part_message = true;
  67                                 break;
  68                                 case 'q':
  69                                         flag_quit_message = true;
  70                                 break;
  71                                 case 'p':
  72                                         flag_privmsg = true;
  73                                 break;
  74                                 case 'n':
  75                                         flag_notice = true;
  76                                 break;
  77                                 case '*':
  78                                         flag_no_opers = flag_part_message = flag_quit_message =
  79                                                 flag_privmsg = flag_notice = true;
  80                                 break;
  81                                 default:
  82                                         return x;
  83                                 break;
  84                         }
  85                 }
  86                 return 0;
  87         }
  88
  89         FilterResult()
  90         {
  91         }
  92
  93         virtual ~FilterResult()
  94         {
  95         }
  96 };
  97
  98 class CommandFilter;
  99
 100 class FilterBase : public Module
 101 {
 102         CommandFilter* filtcommand;
 103         int flags;
 104 protected:
 105         std::vector<std::string> exemptfromfilter; // List of channel names excluded from filtering.
 106  public:
 107         FilterBase(InspIRCd* Me, const std::string &source);
 108         virtual ~FilterBase();
 109         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
 110         virtual FilterResult* FilterMatch(User* user, const std::string &text, int flags) = 0;
 111         virtual bool DeleteFilter(const std::string &freeform) = 0;
 112         virtual void SyncFilters(Module* proto, void* opaque) = 0;
 113         virtual void SendFilter(Module* proto, void* opaque, FilterResult* iter);
 114         virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &flags) = 0;
 115         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
 116         virtual void OnRehash(User* user, const std::string &parameter);
 117         virtual Version GetVersion();
 118         std::string EncodeFilter(FilterResult* filter);
 119         FilterResult DecodeFilter(const std::string &data);
 120         virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable = false);
 121         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata);
 122         virtual int OnStats(char symbol, User* user, string_list &results) = 0;
 123         virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line);
 124         bool AppliesToMe(User* user, FilterResult* filter, int flags);
 125         void OnLoadModule(Module* mod, const std::string& name);
 126         virtual void ReadFilters(ConfigReader &MyConf) = 0;
 127 };
 128
 129 class CommandFilter : public Command
 130 {
 131         FilterBase* Base;
 132  public:
 133         CommandFilter(FilterBase* f, InspIRCd* Me, const std::string &ssource) : Command(Me, "FILTER", "o", 1, 5), Base(f)
 134         {
 135                 this->source = ssource;
 136                 this->syntax = "<filter-definition> <type> <flags> [<gline-duration>] :<reason>";
 137         }
 138
 139         CmdResult Handle(const std::vector<std::string> &parameters, User *user)
 140         {
 141                 if (parameters.size() == 1)
 142                 {
 143                         /* Deleting a filter */
 144                         if (Base->DeleteFilter(parameters[0]))
 145                         {
 146                                 user->WriteServ("NOTICE %s :*** Deleted filter '%s'", user->nick.c_str(), parameters[0].c_str());
 147                                 return CMD_SUCCESS;
 148                         }
 149                         else
 150                         {
 151                                 user->WriteServ("NOTICE %s :*** Filter '%s' not found on list.", user->nick.c_str(), parameters[0].c_str());
 152                                 return CMD_FAILURE;
 153                         }
 154                 }
 155                 else
 156                 {
 157                         /* Adding a filter */
 158                         if (parameters.size() >= 4)
 159                         {
 160                                 std::string freeform = parameters[0];
 161                                 std::string type = parameters[1];
 162                                 std::string flags = parameters[2];
 163                                 std::string reason;
 164                                 long duration = 0;
 165
 166
 167                                 if ((type != "gline") && (type != "none") && (type != "block") && (type != "kill") && (type != "silent"))
 168                                 {
 169                                         user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick.c_str(), freeform.c_str());
 170                                         return CMD_FAILURE;
 171                                 }
 172
 173                                 if (type == "gline")
 174                                 {
 175                                         if (parameters.size() >= 5)
 176                                         {
 177                                                 duration = ServerInstance->Duration(parameters[3]);
 178                                                 reason = parameters[4];
 179                                         }
 180                                         else
 181                                         {
 182                                                 this->TooFewParams(user, " When setting a gline type filter, a gline duration must be specified as the third parameter.");
 183                                                 return CMD_FAILURE;
 184                                         }
 185                                 }
 186                                 else
 187                                 {
 188                                         reason = parameters[3];
 189                                 }
 190                                 std::pair<bool, std::string> result = Base->AddFilter(freeform, type, reason, duration, flags);
 191                                 if (result.first)
 192                                 {
 193                                         user->WriteServ("NOTICE %s :*** Added filter '%s', type '%s'%s%s, flags '%s', reason: '%s'", user->nick.c_str(), freeform.c_str(),
 194                                                         type.c_str(), (duration ? " duration: " : ""), (duration ? parameters[3].c_str() : ""),
 195                                                         flags.c_str(), reason.c_str());
 196                                         return CMD_SUCCESS;
 197                                 }
 198                                 else
 199                                 {
 200                                         user->WriteServ("NOTICE %s :*** Filter '%s' could not be added: %s", user->nick.c_str(), freeform.c_str(), result.second.c_str());
 201                                         return CMD_FAILURE;
 202                                 }
 203                         }
 204                         else
 205                         {
 206                                 this->TooFewParams(user, ".");
 207                                 return CMD_FAILURE;
 208                         }
 209
 210                 }
 211         }
 212
 213         void TooFewParams(User* user, const std::string &extra_text)
 214         {
 215                 user->WriteServ("NOTICE %s :*** Not enough parameters%s", user->nick.c_str(), extra_text.c_str());
 216         }
 217 };
 218
 219 bool FilterBase::AppliesToMe(User* user, FilterResult* filter, int iflags)
 220 {
 221         if ((filter->flag_no_opers) && IS_OPER(user))
 222                 return false;
 223         if ((iflags & FLAG_PRIVMSG) && (!filter->flag_privmsg))
 224                 return false;
 225         if ((iflags & FLAG_NOTICE) && (!filter->flag_notice))
 226                 return false;
 227         if ((iflags & FLAG_QUIT)   && (!filter->flag_quit_message))
 228                 return false;
 229         if ((iflags & FLAG_PART)   && (!filter->flag_part_message))
 230                 return false;
 231         return true;
 232 }
 233
 234 FilterBase::FilterBase(InspIRCd* Me, const std::string &source) : Module(Me)
 235 {
 236         Me->Modules->UseInterface("RegularExpression");
 237         filtcommand = new CommandFilter(this, Me, source);
 238         ServerInstance->AddCommand(filtcommand);
 239         Implementation eventlist[] = { I_OnPreCommand, I_OnStats, I_OnSyncOtherMetaData, I_OnDecodeMetaData, I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_OnLoadModule };
 240         ServerInstance->Modules->Attach(eventlist, this, 8);
 241 }
 242
 243 FilterBase::~FilterBase()
 244 {
 245         ServerInstance->Modules->DoneWithInterface("RegularExpression");
 246 }
 247
 248 int FilterBase::OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 249 {
 250         flags = FLAG_PRIVMSG;
 251         return OnUserPreNotice(user,dest,target_type,text,status,exempt_list);
 252 }
 253
 254 int FilterBase::OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 255 {
 256         if (!flags)
 257                 flags = FLAG_NOTICE;
 258
 259         /* Leave ulines alone */
 260         if ((ServerInstance->ULine(user->server)) || (!IS_LOCAL(user)))
 261                 return 0;
 262
 263         FilterResult* f = this->FilterMatch(user, text, flags);
 264         if (f)
 265         {
 266                 std::string target = "";
 267                 if (target_type == TYPE_USER)
 268                 {
 269                         User* t = (User*)dest;
 270                         target = std::string(t->nick);
 271                 }
 272                 else if (target_type == TYPE_CHANNEL)
 273                 {
 274                         Channel* t = (Channel*)dest;
 275                         target = std::string(t->name);
 276                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), target);
 277                         if (i != exemptfromfilter.end()) return 0;
 278                 }
 279                 if (f->action == "block")
 280                 {
 281                         ServerInstance->SNO->WriteToSnoMask('A', std::string("FILTER: ")+user->nick+" had their message filtered, target was "+target+": "+f->reason);
 282                         user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered and opers notified: "+f->reason);
 283                 }
 284                 if (f->action == "silent")
 285                 {
 286                         user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered: "+f->reason);
 287                 }
 288                 if (f->action == "kill")
 289                 {
 290                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 291                 }
 292                 if (f->action == "gline")
 293                 {
 294                         GLine* gl = new GLine(ServerInstance, ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), "*", user->GetIPString());
 295                         if (ServerInstance->XLines->AddLine(gl,NULL))
 296                         {
 297                                 ServerInstance->XLines->ApplyLines();
 298                         }
 299                         else
 300                                 delete gl;
 301                 }
 302
 303                 ServerInstance->Logs->Log("FILTER",DEFAULT,"FILTER: "+ user->nick + " had their message filtered, target was " + target + ": " + f->reason + " Action: " + f->action);
 304                 return 1;
 305         }
 306         return 0;
 307 }
 308
 309 int FilterBase::OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 310 {
 311         flags = 0;
 312         if (validated && IS_LOCAL(user))
 313         {
 314                 std::string checkline;
 315                 int replacepoint = 0;
 316                 bool parting = false;
 317
 318                 if (command == "QUIT")
 319                 {
 320                         /* QUIT with no reason: nothing to do */
 321                         if (parameters.size() < 1)
 322                                 return 0;
 323
 324                         checkline = parameters[0];
 325                         replacepoint = 0;
 326                         parting = false;
 327                         flags = FLAG_QUIT;
 328                 }
 329                 else if (command == "PART")
 330                 {
 331                         /* PART with no reason: nothing to do */
 332                         if (parameters.size() < 2)
 333                                 return 0;
 334
 335                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), parameters[0]);
 336                         if (i != exemptfromfilter.end()) return 0;
 337                         checkline = parameters[1];
 338                         replacepoint = 1;
 339                         parting = true;
 340                         flags = FLAG_PART;
 341                 }
 342                 else
 343                         /* We're only messing with PART and QUIT */
 344                         return 0;
 345
 346                 FilterResult* f = NULL;
 347
 348                 if (flags)
 349                         f = this->FilterMatch(user, checkline, flags);
 350
 351                 if (!f)
 352                         /* PART or QUIT reason doesnt match a filter */
 353                         return 0;
 354
 355                 /* We cant block a part or quit, so instead we change the reason to 'Reason filtered' */
 356                 Command* c = ServerInstance->Parser->GetHandler(command);
 357                 if (c)
 358                 {
 359                         std::vector<std::string> params;
 360                         for (int item = 0; item < (int)parameters.size(); item++)
 361                                 params.push_back(parameters[item]);
 362                         params[replacepoint] = "Reason filtered";
 363
 364                         /* We're blocking, OR theyre quitting and its a KILL action
 365                          * (we cant kill someone whos already quitting, so filter them anyway)
 366                          */
 367                         if ((f->action == "block") || (((!parting) && (f->action == "kill"))) || (f->action == "silent"))
 368                         {
 369                                 c->Handle(params, user);
 370                                 return 1;
 371                         }
 372                         else
 373                         {
 374                                 /* Are they parting, if so, kill is applicable */
 375                                 if ((parting) && (f->action == "kill"))
 376                                 {
 377                                         user->WriteServ("NOTICE %s :*** Your PART message was filtered: %s", user->nick.c_str(), f->reason.c_str());
 378                                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 379                                 }
 380                                 if (f->action == "gline")
 381                                 {
 382                                         /* Note: We gline *@IP so that if their host doesnt resolve the gline still applies. */
 383                                         GLine* gl = new GLine(ServerInstance, ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), "*", user->GetIPString());
 384                                         if (ServerInstance->XLines->AddLine(gl,NULL))
 385                                         {
 386                                                 ServerInstance->XLines->ApplyLines();
 387                                         }
 388                                         else
 389                                                 delete gl;
 390                                 }
 391                                 return 1;
 392                         }
 393                 }
 394                 return 0;
 395         }
 396         return 0;
 397 }
 398
 399 void FilterBase::OnRehash(User* user, const std::string &parameter)
 400 {
 401         ConfigReader* MyConf = new ConfigReader(ServerInstance);
 402         std::vector<std::string>().swap(exemptfromfilter);
 403         for (int index = 0; index < MyConf->Enumerate("exemptfromfilter"); ++index)
 404         {
 405                 std::string chan = MyConf->ReadValue("exemptfromfilter", "channel", index);
 406                 if (!chan.empty()) {
 407                         exemptfromfilter.push_back(chan);
 408                 }
 409         }
 410         std::string newrxengine = MyConf->ReadValue("filteropts", "engine", 0);
 411         if (!RegexEngine.empty())
 412         {
 413                 if (RegexEngine == newrxengine)
 414                         return;
 415
 416                 ServerInstance->SNO->WriteToSnoMask('A', "Dumping all filters due to regex engine change (was '%s', now '%s')", RegexEngine.c_str(), newrxengine.c_str());
 417                 //ServerInstance->XLines->DelAll("R");
 418         }
 419         rxengine = NULL;
 420
 421         RegexEngine = newrxengine;
 422         modulelist* ml = ServerInstance->Modules->FindInterface("RegularExpression");
 423         if (ml)
 424         {
 425                 for (modulelist::iterator i = ml->begin(); i != ml->end(); ++i)
 426                 {
 427                         if (RegexNameRequest(this, *i).Send() == newrxengine)
 428                         {
 429                                 ServerInstance->SNO->WriteToSnoMask('A', "Filter now using engine '%s'", RegexEngine.c_str());
 430                                 rxengine = *i;
 431                         }
 432                 }
 433         }
 434         if (!rxengine)
 435         {
 436                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: Regex engine '%s' is not loaded - Filter functionality disabled until this is corrected.", RegexEngine.c_str());
 437         }
 438
 439         delete MyConf;
 440 }
 441
 442 void FilterBase::OnLoadModule(Module* mod, const std::string& name)
 443 {
 444         if (ServerInstance->Modules->ModuleHasInterface(mod, "RegularExpression"))
 445         {
 446                 std::string rxname = RegexNameRequest(this, mod).Send();
 447                 if (rxname == RegexEngine)
 448                 {
 449                         rxengine = mod;
 450                         /* Force a rehash to make sure that any filters that couldnt be applied from the conf
 451                          * on startup or on load are applied right now.
 452                          */
 453                         ConfigReader Config(ServerInstance);
 454                         ServerInstance->SNO->WriteToSnoMask('A', "Found and activated regex module '%s' for m_filter.so.", RegexEngine.c_str());
 455                         ReadFilters(Config);
 456                 }
 457         }
 458 }
 459
 460
 461 Version FilterBase::GetVersion()
 462 {
 463         return Version("$Id$", VF_VENDOR | VF_COMMON, API_VERSION);
 464 }
 465
 466
 467 std::string FilterBase::EncodeFilter(FilterResult* filter)
 468 {
 469         std::ostringstream stream;
 470         std::string x = filter->freeform;
 471
 472         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 473         for (std::string::iterator n = x.begin(); n != x.end(); n++)
 474                 if (*n == ' ')
 475                         *n = '\7';
 476
 477         stream << x << " " << filter->action << " " << (filter->flags.empty() ? "-" : filter->flags) << " " << filter->gline_time << " :" << filter->reason;
 478         return stream.str();
 479 }
 480
 481 FilterResult FilterBase::DecodeFilter(const std::string &data)
 482 {
 483         FilterResult res;
 484         irc::tokenstream tokens(data);
 485         tokens.GetToken(res.freeform);
 486         tokens.GetToken(res.action);
 487         tokens.GetToken(res.flags);
 488         if (res.flags == "-")
 489                 res.flags = "";
 490         res.FillFlags(res.flags);
 491         tokens.GetToken(res.gline_time);
 492         tokens.GetToken(res.reason);
 493
 494         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 495         for (std::string::iterator n = res.freeform.begin(); n != res.freeform.end(); n++)
 496                 if (*n == '\7')
 497                         *n = ' ';
 498
 499         return res;
 500 }
 501
 502 void FilterBase::OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable)
 503 {
 504         this->SyncFilters(proto, opaque);
 505 }
 506
 507 void FilterBase::SendFilter(Module* proto, void* opaque, FilterResult* iter)
 508 {
 509         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "filter", EncodeFilter(iter));
 510 }
 511
 512 void FilterBase::OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 513 {
 514         if ((target_type == TYPE_OTHER) && (extname == "filter"))
 515         {
 516                 FilterResult data = DecodeFilter(extdata);
 517                 this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.flags);
 518         }
 519 }
 520
 521 class ImplFilter : public FilterResult
 522 {
 523  public:
 524         Regex* regex;
 525
 526         ImplFilter(Module* mymodule, const std::string &rea, const std::string &act, long glinetime, const std::string &pat, const std::string &flgs)
 527                 : FilterResult(pat, rea, act, glinetime, flgs)
 528         {
 529                 if (!rxengine)
 530                         throw ModuleException("Regex module implementing '"+RegexEngine+"' is not loaded!");
 531
 532                 regex = RegexFactoryRequest(mymodule, rxengine, pat).Create();
 533         }
 534
 535         ImplFilter()
 536         {
 537         }
 538 };
 539
 540 class ModuleFilter : public FilterBase
 541 {
 542         std::vector<ImplFilter> filters;
 543         const char *error;
 544         int erroffset;
 545         ImplFilter fr;
 546
 547  public:
 548         ModuleFilter(InspIRCd* Me)
 549         : FilterBase(Me, "m_filter.so")
 550         {
 551                 OnRehash(NULL,"");
 552         }
 553
 554         virtual ~ModuleFilter()
 555         {
 556         }
 557
 558         virtual FilterResult* FilterMatch(User* user, const std::string &text, int flgs)
 559         {
 560                 for (std::vector<ImplFilter>::iterator index = filters.begin(); index != filters.end(); index++)
 561                 {
 562                         /* Skip ones that dont apply to us */
 563                         if (!FilterBase::AppliesToMe(user, dynamic_cast<FilterResult*>(&(*index)), flgs))
 564                                 continue;
 565
 566                         //ServerInstance->Logs->Log("m_filter", DEBUG, "Match '%s' against '%s'", text.c_str(), index->freeform.c_str());
 567                         if (index->regex->Matches(text))
 568                         {
 569                                 //ServerInstance->Logs->Log("m_filter", DEBUG, "MATCH");
 570                                 fr = *index;
 571                                 if (index != filters.begin())
 572                                 {
 573                                         /* Move to head of list for efficiency */
 574                                         filters.erase(index);
 575                                         filters.insert(filters.begin(), fr);
 576                                 }
 577                                 return &fr;
 578                         }
 579                         //ServerInstance->Logs->Log("m_filter", DEBUG, "NO MATCH");
 580                 }
 581                 return NULL;
 582         }
 583
 584         virtual bool DeleteFilter(const std::string &freeform)
 585         {
 586                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 587                 {
 588                         if (i->freeform == freeform)
 589                         {
 590                                 delete i->regex;
 591                                 filters.erase(i);
 592                                 return true;
 593                         }
 594                 }
 595                 return false;
 596         }
 597
 598         virtual void SyncFilters(Module* proto, void* opaque)
 599         {
 600                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 601                 {
 602                         this->SendFilter(proto, opaque, &(*i));
 603                 }
 604         }
 605
 606         virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &flgs)
 607         {
 608                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 609                 {
 610                         if (i->freeform == freeform)
 611                         {
 612                                 return std::make_pair(false, "Filter already exists");
 613                         }
 614                 }
 615
 616                 try
 617                 {
 618                         filters.push_back(ImplFilter(this, reason, type, duration, freeform, flgs));
 619                 }
 620                 catch (ModuleException &e)
 621                 {
 622                         ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", freeform.c_str(), e.GetReason());
 623                         return std::make_pair(false, e.GetReason());
 624                 }
 625                 return std::make_pair(true, "");
 626         }
 627
 628         virtual void OnRehash(User* user, const std::string &parameter)
 629         {
 630                 ConfigReader MyConf(ServerInstance);
 631                 FilterBase::OnRehash(user, parameter);
 632                 ReadFilters(MyConf);
 633         }
 634
 635         void ReadFilters(ConfigReader &MyConf)
 636         {
 637                 for (int index = 0; index < MyConf.Enumerate("keyword"); index++)
 638                 {
 639                         this->DeleteFilter(MyConf.ReadValue("keyword", "pattern", index));
 640
 641                         std::string pattern = MyConf.ReadValue("keyword", "pattern", index);
 642                         std::string reason = MyConf.ReadValue("keyword", "reason", index);
 643                         std::string action = MyConf.ReadValue("keyword", "action", index);
 644                         std::string flgs = MyConf.ReadValue("keyword", "flags", index);
 645                         long gline_time = ServerInstance->Duration(MyConf.ReadValue("keyword", "duration", index));
 646                         if (action.empty())
 647                                 action = "none";
 648                         if (flgs.empty())
 649                                 flgs = "*";
 650
 651                         try
 652                         {
 653                                 filters.push_back(ImplFilter(this, reason, action, gline_time, pattern, flgs));
 654                                 ServerInstance->Logs->Log("m_filter", DEFAULT, "Regular expression %s loaded.", pattern.c_str());
 655                         }
 656                         catch (ModuleException &e)
 657                         {
 658                                 ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", pattern.c_str(), e.GetReason());
 659                         }
 660                 }
 661         }
 662
 663         virtual int OnStats(char symbol, User* user, string_list &results)
 664         {
 665                 if (symbol == 's')
 666                 {
 667                         std::string sn = ServerInstance->Config->ServerName;
 668                         for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 669                         {
 670                                 results.push_back(sn+" 223 "+user->nick+" :"+RegexEngine+":"+i->freeform+" "+i->flags+" "+i->action+" "+ConvToStr(i->gline_time)+" :"+i->reason);
 671                         }
 672                         for (std::vector<std::string>::iterator i = exemptfromfilter.begin(); i != exemptfromfilter.end(); ++i)
 673                         {
 674                                 results.push_back(sn+" 223 "+user->nick+" :EXEMPT "+(*i));
 675                         }
 676                 }
 677                 return 0;
 678         }
 679 };
 680
 681 MODULE_INIT(ModuleFilter)
 682