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