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