src/modules/m_filter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 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         void init();
 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, LocalUser *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                 Module *me = creator;
 169                 if (static_cast<ModuleFilter *>(me)->DeleteFilter(parameters[0]))
 170                 {
 171                         user->WriteServ("NOTICE %s :*** Removed filter '%s'", user->nick.c_str(), parameters[0].c_str());
 172                         ServerInstance->SNO->WriteToSnoMask(IS_LOCAL(user) ? 'a' : 'A', std::string("FILTER: ")+user->nick+" removed filter '"+parameters[0]+"'");
 173                         return CMD_SUCCESS;
 174                 }
 175                 else
 176                 {
 177                         user->WriteServ("NOTICE %s :*** Filter '%s' not found in list, try /stats s.", user->nick.c_str(), parameters[0].c_str());
 178                         return CMD_FAILURE;
 179                 }
 180         }
 181         else
 182         {
 183                 /* Adding a filter */
 184                 if (parameters.size() >= 4)
 185                 {
 186                         std::string freeform = parameters[0];
 187                         std::string type = parameters[1];
 188                         std::string flags = parameters[2];
 189                         std::string reason;
 190                         long duration = 0;
 191
 192
 193                         if ((type != "gline") && (type != "none") && (type != "block") && (type != "kill") && (type != "silent"))
 194                         {
 195                                 user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick.c_str(), type.c_str());
 196                                 return CMD_FAILURE;
 197                         }
 198
 199                         if (type == "gline")
 200                         {
 201                                 if (parameters.size() >= 5)
 202                                 {
 203                                         duration = ServerInstance->Duration(parameters[3]);
 204                                         reason = parameters[4];
 205                                 }
 206                                 else
 207                                 {
 208                                         this->TooFewParams(user, ": When setting a gline type filter, a gline duration must be specified as the third parameter.");
 209                                         return CMD_FAILURE;
 210                                 }
 211                         }
 212                         else
 213                         {
 214                                 reason = parameters[3];
 215                         }
 216
 217                         Module *me = creator;
 218                         std::pair<bool, std::string> result = static_cast<ModuleFilter *>(me)->AddFilter(freeform, type, reason, duration, flags);
 219                         if (result.first)
 220                         {
 221                                 user->WriteServ("NOTICE %s :*** Added filter '%s', type '%s'%s%s, flags '%s', reason: '%s'", user->nick.c_str(), freeform.c_str(),
 222                                                 type.c_str(), (duration ? ", duration " : ""), (duration ? parameters[3].c_str() : ""),
 223                                                 flags.c_str(), reason.c_str());
 224
 225                                 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);
 226
 227                                 return CMD_SUCCESS;
 228                         }
 229                         else
 230                         {
 231                                 user->WriteServ("NOTICE %s :*** Filter '%s' could not be added: %s", user->nick.c_str(), freeform.c_str(), result.second.c_str());
 232                                 return CMD_FAILURE;
 233                         }
 234                 }
 235                 else
 236                 {
 237                         this->TooFewParams(user, ".");
 238                         return CMD_FAILURE;
 239                 }
 240
 241         }
 242 }
 243
 244 bool ModuleFilter::AppliesToMe(User* user, FilterResult* filter, int iflags)
 245 {
 246         if ((filter->flag_no_opers) && IS_OPER(user))
 247                 return false;
 248         if ((iflags & FLAG_PRIVMSG) && (!filter->flag_privmsg))
 249                 return false;
 250         if ((iflags & FLAG_NOTICE) && (!filter->flag_notice))
 251                 return false;
 252         if ((iflags & FLAG_QUIT)   && (!filter->flag_quit_message))
 253                 return false;
 254         if ((iflags & FLAG_PART)   && (!filter->flag_part_message))
 255                 return false;
 256         return true;
 257 }
 258
 259 ModuleFilter::ModuleFilter() : filtcommand(this), RegexEngine(this, "regex")
 260 {
 261 }
 262
 263 void ModuleFilter::init()
 264 {
 265         ServerInstance->AddCommand(&filtcommand);
 266         Implementation eventlist[] = { I_OnPreCommand, I_OnStats, I_OnSyncNetwork, I_OnDecodeMetaData, I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash };
 267         ServerInstance->Modules->Attach(eventlist, this, 7);
 268         OnRehash(NULL);
 269 }
 270
 271 ModuleFilter::~ModuleFilter()
 272 {
 273 }
 274
 275 ModResult ModuleFilter::OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 276 {
 277         if (!IS_LOCAL(user))
 278                 return MOD_RES_PASSTHRU;
 279
 280         flags = FLAG_PRIVMSG;
 281         return OnUserPreNotice(user,dest,target_type,text,status,exempt_list);
 282 }
 283
 284 ModResult ModuleFilter::OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 285 {
 286         /* Leave ulines alone */
 287         if ((ServerInstance->ULine(user->server)) || (!IS_LOCAL(user)))
 288                 return MOD_RES_PASSTHRU;
 289
 290         if (!flags)
 291                 flags = FLAG_NOTICE;
 292
 293         FilterResult* f = this->FilterMatch(user, text, flags);
 294         if (f)
 295         {
 296                 std::string target = "";
 297                 if (target_type == TYPE_USER)
 298                 {
 299                         User* t = (User*)dest;
 300                         target = std::string(t->nick);
 301                 }
 302                 else if (target_type == TYPE_CHANNEL)
 303                 {
 304                         Channel* t = (Channel*)dest;
 305                         target = std::string(t->name);
 306                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), target);
 307                         if (i != exemptfromfilter.end()) return MOD_RES_PASSTHRU;
 308                 }
 309                 if (f->action == "block")
 310                 {
 311                         ServerInstance->SNO->WriteGlobalSno('a', std::string("FILTER: ")+user->nick+" had their message filtered, target was "+target+": "+f->reason);
 312                         if (target_type == TYPE_CHANNEL)
 313                                 user->WriteNumeric(404, "%s %s :Message to channel blocked and opers notified (%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 and opers notified: "+f->reason);
 316                 }
 317                 if (f->action == "silent")
 318                 {
 319                         if (target_type == TYPE_CHANNEL)
 320                                 user->WriteNumeric(404, "%s %s :Message to channel blocked (%s)",user->nick.c_str(), target.c_str(), f->reason.c_str());
 321                         else
 322                                 user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message to "+target+" was blocked: "+f->reason);
 323                 }
 324                 if (f->action == "kill")
 325                 {
 326                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 327                 }
 328                 if (f->action == "gline")
 329                 {
 330                         GLine* gl = new GLine(ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName.c_str(), f->reason.c_str(), "*", user->GetIPString());
 331                         if (ServerInstance->XLines->AddLine(gl,NULL))
 332                         {
 333                                 ServerInstance->XLines->ApplyLines();
 334                         }
 335                         else
 336                                 delete gl;
 337                 }
 338
 339                 ServerInstance->Logs->Log("FILTER",DEFAULT,"FILTER: "+ user->nick + " had their message filtered, target was " + target + ": " + f->reason + " Action: " + f->action);
 340                 return MOD_RES_DENY;
 341         }
 342         return MOD_RES_PASSTHRU;
 343 }
 344
 345 ModResult ModuleFilter::OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line)
 346 {
 347         flags = 0;
 348         if (validated && IS_LOCAL(user))
 349         {
 350                 std::string checkline;
 351                 int replacepoint = 0;
 352                 bool parting = false;
 353
 354                 if (command == "QUIT")
 355                 {
 356                         /* QUIT with no reason: nothing to do */
 357                         if (parameters.size() < 1)
 358                                 return MOD_RES_PASSTHRU;
 359
 360                         checkline = parameters[0];
 361                         replacepoint = 0;
 362                         parting = false;
 363                         flags = FLAG_QUIT;
 364                 }
 365                 else if (command == "PART")
 366                 {
 367                         /* PART with no reason: nothing to do */
 368                         if (parameters.size() < 2)
 369                                 return MOD_RES_PASSTHRU;
 370
 371                         std::vector<std::string>::iterator i = find(exemptfromfilter.begin(), exemptfromfilter.end(), parameters[0]);
 372                         if (i != exemptfromfilter.end()) return MOD_RES_PASSTHRU;
 373                         checkline = parameters[1];
 374                         replacepoint = 1;
 375                         parting = true;
 376                         flags = FLAG_PART;
 377                 }
 378                 else
 379                         /* We're only messing with PART and QUIT */
 380                         return MOD_RES_PASSTHRU;
 381
 382                 FilterResult* f = NULL;
 383
 384                 if (flags)
 385                         f = this->FilterMatch(user, checkline, flags);
 386
 387                 if (!f)
 388                         /* PART or QUIT reason doesnt match a filter */
 389                         return MOD_RES_PASSTHRU;
 390
 391                 /* We cant block a part or quit, so instead we change the reason to 'Reason filtered' */
 392                 Command* c = ServerInstance->Parser->GetHandler(command);
 393                 if (c)
 394                 {
 395                         std::vector<std::string> params;
 396                         for (int item = 0; item < (int)parameters.size(); item++)
 397                                 params.push_back(parameters[item]);
 398                         params[replacepoint] = "Reason filtered";
 399
 400                         /* We're blocking, OR theyre quitting and its a KILL action
 401                          * (we cant kill someone whos already quitting, so filter them anyway)
 402                          */
 403                         if ((f->action == "block") || (((!parting) && (f->action == "kill"))) || (f->action == "silent"))
 404                         {
 405                                 c->Handle(params, user);
 406                                 return MOD_RES_DENY;
 407                         }
 408                         else
 409                         {
 410                                 /* Are they parting, if so, kill is applicable */
 411                                 if ((parting) && (f->action == "kill"))
 412                                 {
 413                                         user->WriteServ("NOTICE %s :*** Your PART message was filtered: %s", user->nick.c_str(), f->reason.c_str());
 414                                         ServerInstance->Users->QuitUser(user, "Filtered: " + f->reason);
 415                                 }
 416                                 if (f->action == "gline")
 417                                 {
 418                                         /* Note: We gline *@IP so that if their host doesnt resolve the gline still applies. */
 419                                         GLine* gl = new GLine(ServerInstance->Time(), f->gline_time, ServerInstance->Config->ServerName.c_str(), f->reason.c_str(), "*", user->GetIPString());
 420                                         if (ServerInstance->XLines->AddLine(gl,NULL))
 421                                         {
 422                                                 ServerInstance->XLines->ApplyLines();
 423                                         }
 424                                         else
 425                                                 delete gl;
 426                                 }
 427                                 return MOD_RES_DENY;
 428                         }
 429                 }
 430                 return MOD_RES_PASSTHRU;
 431         }
 432         return MOD_RES_PASSTHRU;
 433 }
 434
 435 void ModuleFilter::OnRehash(User* user)
 436 {
 437         ConfigReader MyConf;
 438         std::vector<std::string>().swap(exemptfromfilter);
 439         for (int index = 0; index < MyConf.Enumerate("exemptfromfilter"); ++index)
 440         {
 441                 std::string chan = MyConf.ReadValue("exemptfromfilter", "channel", index);
 442                 if (!chan.empty()) {
 443                         exemptfromfilter.push_back(chan);
 444                 }
 445         }
 446         std::string newrxengine = "regex/" + MyConf.ReadValue("filteropts", "engine", 0);
 447         if (newrxengine == "regex/")
 448                 newrxengine = "regex";
 449         if (RegexEngine.GetProvider() == newrxengine)
 450                 return;
 451
 452         //ServerInstance->SNO->WriteGlobalSno('a', "Dumping all filters due to regex engine change (was '%s', now '%s')", RegexEngine.GetProvider().c_str(), newrxengine.c_str());
 453         //ServerInstance->XLines->DelAll("R");
 454
 455         RegexEngine.SetProvider(newrxengine);
 456         if (!RegexEngine)
 457         {
 458                 ServerInstance->SNO->WriteGlobalSno('a', "WARNING: Regex engine '%s' is not loaded - Filter functionality disabled until this is corrected.", newrxengine.c_str());
 459         }
 460         ReadFilters(MyConf);
 461 }
 462
 463 Version ModuleFilter::GetVersion()
 464 {
 465         return Version("Text (spam) filtering", VF_VENDOR | VF_COMMON, RegexEngine ? RegexEngine->name : "");
 466 }
 467
 468
 469 std::string ModuleFilter::EncodeFilter(FilterResult* filter)
 470 {
 471         std::ostringstream stream;
 472         std::string x = filter->freeform;
 473
 474         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 475         for (std::string::iterator n = x.begin(); n != x.end(); n++)
 476                 if (*n == ' ')
 477                         *n = '\7';
 478
 479         stream << x << " " << filter->action << " " << (filter->flags.empty() ? "-" : filter->flags) << " " << filter->gline_time << " :" << filter->reason;
 480         return stream.str();
 481 }
 482
 483 FilterResult ModuleFilter::DecodeFilter(const std::string &data)
 484 {
 485         FilterResult res;
 486         irc::tokenstream tokens(data);
 487         tokens.GetToken(res.freeform);
 488         tokens.GetToken(res.action);
 489         tokens.GetToken(res.flags);
 490         if (res.flags == "-")
 491                 res.flags = "";
 492         res.FillFlags(res.flags);
 493         tokens.GetToken(res.gline_time);
 494         tokens.GetToken(res.reason);
 495
 496         /* Hax to allow spaces in the freeform without changing the design of the irc protocol */
 497         for (std::string::iterator n = res.freeform.begin(); n != res.freeform.end(); n++)
 498                 if (*n == '\7')
 499                         *n = ' ';
 500
 501         return res;
 502 }
 503
 504 void ModuleFilter::OnSyncNetwork(Module* proto, void* opaque)
 505 {
 506         this->SyncFilters(proto, opaque);
 507 }
 508
 509 void ModuleFilter::SendFilter(Module* proto, void* opaque, FilterResult* iter)
 510 {
 511         proto->ProtoSendMetaData(opaque, NULL, "filter", EncodeFilter(iter));
 512 }
 513
 514 void ModuleFilter::OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata)
 515 {
 516         if ((target == NULL) && (extname == "filter"))
 517         {
 518                 FilterResult data = DecodeFilter(extdata);
 519                 this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.flags);
 520         }
 521 }
 522
 523 ImplFilter::ImplFilter(ModuleFilter* mymodule, const std::string &rea, const std::string &act, long glinetime, const std::string &pat, const std::string &flgs)
 524                 : FilterResult(pat, rea, act, glinetime, flgs)
 525 {
 526         if (!mymodule->RegexEngine)
 527                 throw ModuleException("Regex module implementing '"+mymodule->RegexEngine.GetProvider()+"' is not loaded!");
 528         regex = mymodule->RegexEngine->Create(pat);
 529 }
 530
 531 FilterResult* ModuleFilter::FilterMatch(User* user, const std::string &text, int flgs)
 532 {
 533         for (std::vector<ImplFilter>::iterator index = filters.begin(); index != filters.end(); index++)
 534         {
 535                 /* Skip ones that dont apply to us */
 536                 if (!AppliesToMe(user, dynamic_cast<FilterResult*>(&(*index)), flgs))
 537                         continue;
 538
 539                 //ServerInstance->Logs->Log("m_filter", DEBUG, "Match '%s' against '%s'", text.c_str(), index->freeform.c_str());
 540                 if (index->regex->Matches(text))
 541                 {
 542                         //ServerInstance->Logs->Log("m_filter", DEBUG, "MATCH");
 543                         ImplFilter fr = *index;
 544                         if (index != filters.begin())
 545                         {
 546                                 /* Move to head of list for efficiency */
 547                                 filters.erase(index);
 548                                 filters.insert(filters.begin(), fr);
 549                         }
 550                         return &*filters.begin();
 551                 }
 552                 //ServerInstance->Logs->Log("m_filter", DEBUG, "NO MATCH");
 553         }
 554         return NULL;
 555 }
 556
 557 bool ModuleFilter::DeleteFilter(const std::string &freeform)
 558 {
 559         for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 560         {
 561                 if (i->freeform == freeform)
 562                 {
 563                         delete i->regex;
 564                         filters.erase(i);
 565                         return true;
 566                 }
 567         }
 568         return false;
 569 }
 570
 571 void ModuleFilter::SyncFilters(Module* proto, void* opaque)
 572 {
 573         for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 574         {
 575                 this->SendFilter(proto, opaque, &(*i));
 576         }
 577 }
 578
 579 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)
 580 {
 581         for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 582         {
 583                 if (i->freeform == freeform)
 584                 {
 585                         return std::make_pair(false, "Filter already exists");
 586                 }
 587         }
 588
 589         try
 590         {
 591                 filters.push_back(ImplFilter(this, reason, type, duration, freeform, flgs));
 592         }
 593         catch (ModuleException &e)
 594         {
 595                 ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", freeform.c_str(), e.GetReason());
 596                 return std::make_pair(false, e.GetReason());
 597         }
 598         return std::make_pair(true, "");
 599 }
 600
 601 void ModuleFilter::ReadFilters(ConfigReader &MyConf)
 602 {
 603         for (int index = 0; index < MyConf.Enumerate("keyword"); index++)
 604         {
 605                 this->DeleteFilter(MyConf.ReadValue("keyword", "pattern", index));
 606
 607                 std::string pattern = MyConf.ReadValue("keyword", "pattern", index);
 608                 std::string reason = MyConf.ReadValue("keyword", "reason", index);
 609                 std::string action = MyConf.ReadValue("keyword", "action", index);
 610                 std::string flgs = MyConf.ReadValue("keyword", "flags", index);
 611                 long gline_time = ServerInstance->Duration(MyConf.ReadValue("keyword", "duration", index));
 612                 if (action.empty())
 613                         action = "none";
 614                 if (flgs.empty())
 615                         flgs = "*";
 616
 617                 try
 618                 {
 619                         filters.push_back(ImplFilter(this, reason, action, gline_time, pattern, flgs));
 620                         ServerInstance->Logs->Log("m_filter", DEFAULT, "Regular expression %s loaded.", pattern.c_str());
 621                 }
 622                 catch (ModuleException &e)
 623                 {
 624                         ServerInstance->Logs->Log("m_filter", DEFAULT, "Error in regular expression '%s': %s", pattern.c_str(), e.GetReason());
 625                 }
 626         }
 627 }
 628
 629 ModResult ModuleFilter::OnStats(char symbol, User* user, string_list &results)
 630 {
 631         if (symbol == 's')
 632         {
 633                 std::string sn = ServerInstance->Config->ServerName;
 634                 for (std::vector<ImplFilter>::iterator i = filters.begin(); i != filters.end(); i++)
 635                 {
 636                         results.push_back(sn+" 223 "+user->nick+" :"+RegexEngine.GetProvider()+":"+i->freeform+" "+i->flags+" "+i->action+" "+ConvToStr(i->gline_time)+" :"+i->reason);
 637                 }
 638                 for (std::vector<std::string>::iterator i = exemptfromfilter.begin(); i != exemptfromfilter.end(); ++i)
 639                 {
 640                         results.push_back(sn+" 223 "+user->nick+" :EXEMPT "+(*i));
 641                 }
 642         }
 643         return MOD_RES_PASSTHRU;
 644 }
 645
 646 MODULE_INIT(ModuleFilter)