src/modules/m_filter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "xline.h"
  19 #include "m_regex.h"
  20
  21 /* $ModDesc: Text (spam) filtering */
  22
  23 static std::string RegexEngine = "";
  24 static Module* rxengine = NULL;
  25
  26 enum FilterFlags
  27 {
  28         FLAG_PART = 2,
  29         FLAG_QUIT = 4,
  30         FLAG_PRIVMSG = 8,
  31         FLAG_NOTICE = 16
  32 };
  33
  34 class FilterResult : public classbase
  35 {
  36  public:
  37         std::string freeform;
  38         std::string reason;
  39         std::string action;
  40         long gline_time;
  41         std::string flags;
  42
  43         bool flag_no_opers;
  44         bool flag_part_message;
  45         bool flag_quit_message;
  46         bool flag_privmsg;
  47         bool flag_notice;
  48
  49         FilterResult(const std::string free, const std::string &rea, const std::string &act, long gt, const std::string &fla) :
  50                         freeform(free), reason(rea), action(act), gline_time(gt), flags(fla)
  51         {
  52                 this->FillFlags(fla);
  53         }
  54
  55         int FillFlags(const std::string &fl)
  56         {
  57                 flags = fl;
  58                 flag_no_opers = flag_part_message = flag_quit_message = flag_privmsg = flag_notice = false;
  59                 size_t x = 0;
  60
  61                 for (std::string::const_iterator n = flags.begin(); n != flags.end(); ++n, ++x)
  62                 {
  63                         switch (*n)
  64                         {
  65                                 case 'o':
  66                                         flag_no_opers = true;
  67                                 break;
  68                                 case 'P':
  69                                         flag_part_message = true;
  70                                 break;
  71                                 case 'q':
  72                                         flag_quit_message = true;
  73                                 break;
  74                                 case 'p':
  75                                         flag_privmsg = true;
  76                                 break;
  77                                 case 'n':
  78                                         flag_notice = true;
  79                                 break;
  80                                 case '*':
  81                                         flag_no_opers = flag_part_message = flag_quit_message =
  82                                                 flag_privmsg = flag_notice = true;
  83                                 break;
  84                                 default:
  85                                         return x;
  86                                 break;
  87                         }
  88                 }
  89                 return 0;
  90         }
  91
  92         FilterResult()
  93         {
  94         }
  95
  96         virtual ~FilterResult()
  97         {
  98         }
  99 };
 100
 101 class CommandFilter;
 102
 103 class FilterBase : public Module
 104 {
 105         CommandFilter* filtcommand;
 106         int flags;
 107 protected:
 108         std::vector<std::string> exemptfromfilter; // List of channel names excluded from filtering.
 109  public:
 110         FilterBase(InspIRCd* Me, const std::string &source);
 111         virtual ~FilterBase();
 112         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
 113         virtual FilterResult* FilterMatch(User* user, const std::string &text, int flags) = 0;
 114         virtual bool DeleteFilter(const std::string &freeform) = 0;
 115         virtual void SyncFilters(Module* proto, void* opaque) = 0;
 116         virtual void SendFilter(Module* proto, void* opaque, FilterResult* iter);
 117         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;
 118         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
 119         virtual void OnRehash(User* user, const std::string &parameter);
 120         virtual Version GetVersion();
 121         std::string EncodeFilter(FilterResult* filter);
 122         FilterResult DecodeFilter(const std::string &data);
 123         virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable = false);
 124         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata);
 125         virtual int OnStats(char symbol, User* user, string_list &results) = 0;
 126         virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line);
 127         bool AppliesToMe(User* user, FilterResult* filter, int flags);
 128         void OnLoadModule(Module* mod, const std::string& name);
 129         virtual void ReadFilters(ConfigReader &MyConf) = 0;
 130 };
 131
 132 class CommandFilter : public Command
 133 {
 134         FilterBase* Base;
 135  public:
 136         CommandFilter(FilterBase* f, InspIRCd* Me, const std::string &ssource) : Command(Me, "FILTER", "o", 1), Base(f)
 137         {
 138                 this->source = ssource;
 139                 this->syntax = "<filter-definition> <type> <flags> [<gline-duration>] :<reason>";
 140         }
 141
 142         CmdResult Handle(const std::vector<std::string> &parameters, User *user)
 143         {
 144                 if (parameters.size() == 1)
 145                 {
 146                         /* Deleting a filter */
 147                         if (Base->DeleteFilter(parameters[0]))
 148                         {
 149                                 user->WriteServ("NOTICE %s :*** Deleted filter '%s'", user->nick.c_str(), parameters[0].c_str());
 150                                 return CMD_SUCCESS;
 151                         }
 152                         else
 153                         {
 154                                 user->WriteServ("NOTICE %s :*** Filter '%s' not found on list.", user->nick.c_str(), parameters[0].c_str());
 155                                 return CMD_FAILURE;
 156                         }
 157                 }
 158                 else
 159                 {
 160                         /* Adding a filter */
 161                         if (parameters.size() >= 4)
 162                         {
 163                                 std::string freeform = parameters[0];
 164                                 std::string type = parameters[1];
 165                                 std::string flags = parameters[2];
 166                                 std::string reason;
 167                                 long duration = 0;
 168
 169
 170                                 if ((type != "gline") && (type != "none") && (type != "block") && (type != "kill") && (type != "silent"))
 171                                 {
 172                                         user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick.c_str(), freeform.c_str());
 173                                         return CMD_FAILURE;
 174                                 }
 175
 176                                 if (type == "gline")
 177                                 {
 178                                         if (parameters.size() >= 5)
 179                                         {
 180                                                 duration = ServerInstance->Duration(parameters[3]);
 181                                                 reason = parameters[4];
 182                                         }
 183                                         else
 184                                         {
 185                                                 this->TooFewParams(user, " When setting a gline type filter, a gline duration must be specified as the third parameter.");
 186                                                 return CMD_FAILURE;
 187                                         }
 188                                 }
 189                                 else
 190                                 {
 191                                         reason = parameters[3];
 192                                 }
 193                                 std::pair<bool, std::string> result = Base->AddFilter(freeform, type, reason, duration, flags);
 194                                 if (result.first)
 195                                 {
 196                                         user->WriteServ("NOTICE %s :*** Added filter '%s', type '%s'%s%s, flags '%s', reason: '%s'", user->nick.c_str(), freeform.c_str(),
 197                                                         type.c_str(), (duration ? " duration: " : ""), (duration ? parameters[3].c_str() : ""),
 198                                                         flags.c_str(), reason.c_str());
 199                                         return CMD_SUCCESS;
 200                                 }
 201                                 else
 202                                 {
 203                                         user->WriteServ("NOTICE %s :*** Filter '%s' could not be added: %s", user->nick.c_str(), freeform.c_str(), result.second.c_str());
 204                                         return CMD_FAILURE;
 205                                 }
 206                         }
 207                         else
 208                         {
 209                                 this->TooFewParams(user, ".");
 210                                 return CMD_FAILURE;
 211                         }
 212
 213                 }
 214         }
 215
 216         void TooFewParams(User* user, const std::string &extra_text)
 217         {
 218                 user->WriteServ("NOTICE %s :*** Not enough parameters%s", user->nick.c_str(), extra_text.c_str());
 219         }
 220 };
 221
 222 bool FilterBase::AppliesToMe(User* user, FilterResult* filter, int iflags)
 223 {
 224         if ((filter->flag_no_opers) && IS_OPER(user))
 225                 return false;
 226         if ((iflags & FLAG_PRIVMSG) && (!filter->flag_privmsg))
 227                 return false;
 228         if ((iflags & FLAG_NOTICE) && (!filter->flag_notice))
 229                 return false;
 230         if ((iflags & FLAG_QUIT)   && (!filter->flag_quit_message))
 231                 return false;
 232         if ((iflags & FLAG_PART)   && (!filter->flag_part_message))
 233                 return false;
 234         return true;
 235 }
 236
 237 FilterBase::FilterBase(InspIRCd* Me, const std::string &source) : Module(Me)
 238 {
 239         Me->Modules->UseInterface("RegularExpression");
 240         filtcommand = new CommandFilter(this, Me, source);
 241         ServerInstance->AddCommand(filtcommand);
 242         Implementation eventlist[] = { I_OnPreCommand, I_OnStats, I_OnSyncOtherMetaData, I_OnDecodeMetaData, I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_OnLoadModule };
 243         ServerInstance->Modules->Attach(eventlist, this, 8);
 244 }
 245
 246 FilterBase::~FilterBase()
 247 {
 248         ServerInstance->Modules->DoneWithInterface("RegularExpression");
 249 }
 250
 251 int FilterBase::OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 252 {
 253         flags = FLAG_PRIVMSG;
 254         return OnUserPreNotice(user,dest,target_type,text,status,exempt_list);
 255 }
 256
 257 int FilterBase::OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 258 {
 259         if (!flags)
 260                 flags = FLAG_NOTICE;
 261
 262         /* Leave ulines alone */
 263         if ((ServerInstance->ULine(user->server)) || (!IS_LOCAL(user)))
 264                 return 0;
 265
 266         FilterResult* f = this->FilterMatch(user, text, flags);
 267         if (f)
 268         {
 269                 std::string target = "";
 270                 if (target_type == TYPE_USER)
 271                 {
 272                         User* t = (User*)dest;
 273                         target = std::string(t->nick);
 274                 }
 275                 else if (target_type == TYPE_CHANNEL)
 276                 {
 277                         Channel* t = (Channel*)dest;
 278                         target = std::string(t->name);
 279                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), target);
 280                         if (i != exemptfromfilter.end()) return 0;
 281                 }
 282                 if (f->action == "block")
 283                 {
 284                         ServerInstance->SNO->WriteToSnoMask('A', std::string("FILTER: ")+user->nick+" had their message filtered, target was "+target+": "+f->reason);
 285                         user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered and opers notified: "+f->reason);
 286                 }
 287                 if (f->action == "silent")
 288                 {
 289                         user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered: "+f->reason);
 290                 }
 291                 if (f->action == "kill")
 292                 {
 293                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 294                 }
 295                 if (f->action == "gline")
 296                 {
 297                         GLine* gl = new GLine(ServerInstance, ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), "*", user->GetIPString());
 298                         if (ServerInstance->XLines->AddLine(gl,NULL))
 299                         {
 300                                 ServerInstance->XLines->ApplyLines();
 301                         }
 302                         else
 303                                 delete gl;
 304                 }
 305
 306                 ServerInstance->Logs->Log("FILTER",DEFAULT,"FILTER: "+ user->nick + " had their message filtered, target was " + target + ": " + f->reason + " Action: " + f->action);
 307                 return 1;
 308         }
 309         return 0;
 310 }
 311
 312 int FilterBase::OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 313 {
 314         flags = 0;
 315         if (validated && IS_LOCAL(user))
 316         {
 317                 std::string checkline;
 318                 int replacepoint = 0;
 319                 bool parting = false;
 320
 321                 if (command == "QUIT")
 322                 {
 323                         /* QUIT with no reason: nothing to do */
 324                         if (parameters.size() < 1)
 325                                 return 0;
 326
 327                         checkline = parameters[0];
 328                         replacepoint = 0;
 329                         parting = false;
 330                         flags = FLAG_QUIT;
 331                 }
 332                 else if (command == "PART")
 333                 {
 334                         /* PART with no reason: nothing to do */
 335                         if (parameters.size() < 2)
 336                                 return 0;
 337
 338                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), parameters[0]);
 339                         if (i != exemptfromfilter.end()) return 0;
 340                         checkline = parameters[1];
 341                         replacepoint = 1;
 342                         parting = true;
 343                         flags = FLAG_PART;
 344                 }
 345                 else
 346                         /* We're only messing with PART and QUIT */
 347                         return 0;
 348
 349                 FilterResult* f = NULL;
 350
 351                 if (flags)
 352                         f = this->FilterMatch(user, checkline, flags);
 353
 354                 if (!f)
 355                         /* PART or QUIT reason doesnt match a filter */
 356                         return 0;
 357
 358                 /* We cant block a part or quit, so instead we change the reason to 'Reason filtered' */
 359                 Command* c = ServerInstance->Parser->GetHandler(command);
 360                 if (c)
 361                 {
 362                         std::vector<std::string> params;
 363                         for (int item = 0; item < (int)parameters.size(); item++)
 364                                 params.push_back(parameters[item]);
 365                         params[replacepoint] = "Reason filtered";
 366
 367                         /* We're blocking, OR theyre quitting and its a KILL action
 368                          * (we cant kill someone whos already quitting, so filter them anyway)
 369                          */
 370                         if ((f->action == "block") || (((!parting) && (f->action == "kill"))) || (f->action == "silent"))
 371                         {
 372                                 c->Handle(params, user);
 373                                 return 1;
 374                         }
 375                         else
 376                         {
 377                                 /* Are they parting, if so, kill is applicable */
 378                                 if ((parting) && (f->action == "kill"))
 379                                 {
 380                                         user->WriteServ("NOTICE %s :*** Your PART message was filtered: %s", user->nick.c_str(), f->reason.c_str());
 381                                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 382                                 }
 383                                 if (f->action == "gline")
 384                                 {
 385                                         /* Note: We gline *@IP so that if their host doesnt resolve the gline still applies. */
 386                                         GLine* gl = new GLine(ServerInstance, ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), "*", user->GetIPString());
 387                                         if (ServerInstance->XLines->AddLine(gl,NULL))
 388                                         {
 389                                                 ServerInstance->XLines->ApplyLines();
 390                                         }
 391                                         else
 392                                                 delete gl;
 393                                 }
 394                                 return 1;
 395                         }
 396                 }
 397                 return 0;
 398         }
 399         return 0;
 400 }
 401
 402 void FilterBase::OnRehash(User* user, const std::string &parameter)
 403 {
 404         ConfigReader* MyConf = new ConfigReader(ServerInstance);
 405         std::vector<std::string>().swap(exemptfromfilter);
 406         for (int index = 0; index < MyConf->Enumerate("exemptfromfilter"); ++index)
 407         {
 408                 std::string chan = MyConf->ReadValue("exemptfromfilter", "channel", index);
 409                 if (!chan.empty()) {
 410                         exemptfromfilter.push_back(chan);
 411                 }
 412         }
 413         std::string newrxengine = MyConf->ReadValue("filteropts", "engine", 0);
 414         if (!RegexEngine.empty())
 415         {
 416                 if (RegexEngine == newrxengine)
 417                         return;
 418
 419                 ServerInstance->SNO->WriteToSnoMask('A', "Dumping all filters due to regex engine change (was '%s', now '%s')", RegexEngine.c_str(), newrxengine.c_str());
 420                 //ServerInstance->XLines->DelAll("R");
 421         }
 422         rxengine = NULL;
 423
 424         RegexEngine = newrxengine;
 425         modulelist* ml = ServerInstance->Modules->FindInterface("RegularExpression");
 426         if (ml)
 427         {
 428                 for (modulelist::iterator i = ml->begin(); i != ml->end(); ++i)
 429                 {
 430                         if (RegexNameRequest(this, *i).Send() == newrxengine)
 431                         {
 432                                 ServerInstance->SNO->WriteToSnoMask('A', "Filter now using engine '%s'", RegexEngine.c_str());
 433                                 rxengine = *i;
 434                         }
 435                 }
 436         }
 437         if (!rxengine)
 438         {
 439                 ServerInstance->SNO->WriteToSnoMask('A', "WARNING: Regex engine '%s' is not loaded - Filter functionality disabled until this is corrected.", RegexEngine.c_str());
 440         }
 441
 442         delete MyConf;
 443 }
 444
 445 void FilterBase::OnLoadModule(Module* mod, const std::string& name)
 446 {
 447         if (ServerInstance->Modules->ModuleHasInterface(mod, "RegularExpression"))
 448         {
 449                 std::string rxname = RegexNameRequest(this, mod).Send();
 450                 if (rxname == RegexEngine)
 451                 {
 452                         rxengine = mod;
 453                         /* Force a rehash to make sure that any filters that couldnt be applied from the conf
 454                          * on startup or on load are applied right now.
 455                          */
 456                         ConfigReader Config(ServerInstance);
 457                         ServerInstance->SNO->WriteToSnoMask('A', "Found and activated regex module '%s' for m_filter.so.", RegexEngine.c_str());
 458                         ReadFilters(Config);
 459                 }
 460         }
 461 }
 462
 463
 464 Version FilterBase::GetVersion()
 465 {
 466         return Version("$Id$", VF_VENDOR | VF_COMMON, API_VERSION);
 467 }
 468
 469
 470 std::string FilterBase::EncodeFilter(FilterResult* filter)
 471 {
 472         std::ostringstream stream;
 473         std::string x = filter->freeform;
 474
 475         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 476         for (std::string::iterator n = x.begin(); n != x.end(); n++)
 477                 if (*n == ' ')
 478                         *n = '\7';
 479
 480         stream << x << " " << filter->action << " " << (filter->flags.empty() ? "-" : filter->flags) << " " << filter->gline_time << " :" << filter->reason;
 481         return stream.str();
 482 }
 483
 484 FilterResult FilterBase::DecodeFilter(const std::string &data)
 485 {
 486         FilterResult res;
 487         irc::tokenstream tokens(data);
 488         tokens.GetToken(res.freeform);
 489         tokens.GetToken(res.action);
 490         tokens.GetToken(res.flags);
 491         if (res.flags == "-")
 492                 res.flags = "";
 493         res.FillFlags(res.flags);
 494         tokens.GetToken(res.gline_time);
 495         tokens.GetToken(res.reason);
 496
 497         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 498         for (std::string::iterator n = res.freeform.begin(); n != res.freeform.end(); n++)
 499                 if (*n == '\7')
 500                         *n = ' ';
 501
 502         return res;
 503 }
 504
 505 void FilterBase::OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable)
 506 {
 507         this->SyncFilters(proto, opaque);
 508 }
 509
 510 void FilterBase::SendFilter(Module* proto, void* opaque, FilterResult* iter)
 511 {
 512         proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "filter", EncodeFilter(iter));
 513 }
 514
 515 void FilterBase::OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 516 {
 517         if ((target_type == TYPE_OTHER) && (extname == "filter"))
 518         {
 519                 FilterResult data = DecodeFilter(extdata);
 520                 this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.flags);
 521         }
 522 }
 523
 524 class ImplFilter : public FilterResult
 525 {
 526  public:
 527         Regex* regex;
 528
 529         ImplFilter(Module* mymodule, const std::string &rea, const std::string &act, long glinetime, const std::string &pat, const std::string &flgs)
 530                 : FilterResult(pat, rea, act, glinetime, flgs)
 531         {
 532                 if (!rxengine)
 533                         throw ModuleException("Regex module implementing '"+RegexEngine+"' is not loaded!");
 534
 535                 regex = RegexFactoryRequest(mymodule, rxengine, pat).Create();
 536         }
 537
 538         ImplFilter()
 539         {
 540         }
 541 };
 542
 543 class ModuleFilter : public FilterBase
 544 {
 545         std::vector<ImplFilter> filters;
 546         const char *error;
 547         int erroffset;
 548         ImplFilter fr;
 549
 550  public:
 551         ModuleFilter(InspIRCd* Me)
 552         : FilterBase(Me, "m_filter.so")
 553         {
 554                 OnRehash(NULL,"");
 555         }
 556
 557         virtual ~ModuleFilter()
 558         {
 559         }
 560
 561         virtual FilterResult* FilterMatch(User* user, const std::string &text, int flgs)
 562         {
 563                 for (std::vector<ImplFilter>::iterator index = filters.begin(); index != filters.end(); index++)
 564                 {
 565                         /* Skip ones that dont apply to us */
 566
 567                         if (!FilterBase::AppliesToMe(user, dynamic_cast<FilterResult*>(&(*index)), flgs))
 568                                 continue;
 569
 570                         if (index->regex->Matches(text))
 571                         {
 572                                 fr = *index;
 573                                 if (index != filters.begin())
 574                                 {
 575                                         /* Move to head of list for efficiency */
 576                                         filters.erase(index);
 577                                         filters.insert(filters.begin(), fr);
 578                                 }
 579                                 return &fr;
 580                         }
 581                 }
 582                 return NULL;
 583         }
 584
 585         virtual bool DeleteFilter(const std::string &freeform)
 586         {
 587                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 588                 {
 589                         if (i->freeform == freeform)
 590                         {
 591                                 delete i->regex;
 592                                 filters.erase(i);
 593                                 return true;
 594                         }
 595                 }
 596                 return false;
 597         }
 598
 599         virtual void SyncFilters(Module* proto, void* opaque)
 600         {
 601                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 602                 {
 603                         this->SendFilter(proto, opaque, &(*i));
 604                 }
 605         }
 606
 607         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)
 608         {
 609                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 610                 {
 611                         if (i->freeform == freeform)
 612                         {
 613                                 return std::make_pair(false, "Filter already exists");
 614                         }
 615                 }
 616
 617                 try
 618                 {
 619                         filters.push_back(ImplFilter(this, reason, type, duration, freeform, flgs));
 620                 }
 621                 catch (ModuleException &e)
 622                 {
 623                         ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", freeform.c_str(), e.GetReason());
 624                         return std::make_pair(false, e.GetReason());
 625                 }
 626                 return std::make_pair(true, "");
 627         }
 628
 629         virtual void OnRehash(User* user, const std::string &parameter)
 630         {
 631                 ConfigReader MyConf(ServerInstance);
 632                 FilterBase::OnRehash(user, parameter);
 633                 ReadFilters(MyConf);
 634         }
 635
 636         void ReadFilters(ConfigReader &MyConf)
 637         {
 638                 for (int index = 0; index < MyConf.Enumerate("keyword"); index++)
 639                 {
 640                         this->DeleteFilter(MyConf.ReadValue("keyword", "pattern", index));
 641
 642                         std::string pattern = MyConf.ReadValue("keyword", "pattern", index);
 643                         std::string reason = MyConf.ReadValue("keyword", "reason", index);
 644                         std::string action = MyConf.ReadValue("keyword", "action", index);
 645                         std::string flgs = MyConf.ReadValue("keyword", "flags", index);
 646                         long gline_time = ServerInstance->Duration(MyConf.ReadValue("keyword", "duration", index));
 647                         if (action.empty())
 648                                 action = "none";
 649                         if (flgs.empty())
 650                                 flgs = "*";
 651
 652                         try
 653                         {
 654                                 filters.push_back(ImplFilter(this, reason, action, gline_time, pattern, flgs));
 655                                 ServerInstance->Logs->Log("m_filter", DEFAULT, "Regular expression %s loaded.", pattern.c_str());
 656                         }
 657                         catch (ModuleException &e)
 658                         {
 659                                 ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", pattern.c_str(), e.GetReason());
 660                         }
 661                 }
 662         }
 663
 664         virtual int OnStats(char symbol, User* user, string_list &results)
 665         {
 666                 if (symbol == 's')
 667                 {
 668                         std::string sn = ServerInstance->Config->ServerName;
 669                         for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 670                         {
 671                                 results.push_back(sn+" 223 "+user->nick+" :REGEXP:"+i->freeform+" "+i->flags+" "+i->action+" "+ConvToStr(i->gline_time)+" :"+i->reason);
 672                         }
 673                         for (std::vector<std::string>::iterator i = exemptfromfilter.begin(); i != exemptfromfilter.end(); ++i)
 674                         {
 675                                 results.push_back(sn+" 223 "+user->nick+" :EXEMPT "+(*i));
 676                         }
 677                 }
 678                 return 0;
 679         }
 680 };
 681
 682 MODULE_INIT(ModuleFilter)
 683