src/modules/m_callerid.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 <set>
  16 #include <sstream>
  17 #include <algorithm>
  18
  19 /* $ModDesc: Implementation of callerid (umode +g & /accept, ala hybrid etc) */
  20
  21 class callerid_data : public classbase
  22 {
  23  public:
  24         time_t lastnotify;
  25
  26         /** Users I accept messages from
  27          */
  28         std::set<User*> accepting;
  29
  30         /** Users who list me as accepted
  31          */
  32         std::list<callerid_data *> wholistsme;
  33
  34         callerid_data() : lastnotify(0) { }
  35         callerid_data(const std::string& str, InspIRCd* ServerInstance)
  36         {
  37                 irc::commasepstream s(str);
  38                 std::string tok;
  39                 if (s.GetToken(tok))
  40                 {
  41                         lastnotify = ConvToInt(tok);
  42                 }
  43                 while (s.GetToken(tok))
  44                 {
  45                         if (tok.empty())
  46                         {
  47                                 continue;
  48                         }
  49
  50                         User *u = ServerInstance->FindNick(tok);
  51                         if (!u)
  52                         {
  53                                 continue;
  54                         }
  55                         accepting.insert(u);
  56                 }
  57         }
  58
  59         std::string ToString(Module* proto) const
  60         {
  61                 std::ostringstream oss;
  62                 oss << lastnotify;
  63                 for (std::set<User*>::const_iterator i = accepting.begin(); i != accepting.end(); ++i)
  64                 {
  65                         // Encode UIDs.
  66                         oss << "," << proto->ProtoTranslate(*i);
  67                 }
  68                 oss << std::ends;
  69                 return oss.str();
  70         }
  71 };
  72
  73 /** Retrieves the callerid information for a given user record
  74  * @param who The user to retrieve callerid information for
  75  * @param extend true to add callerid information if it doesn't already exist, false to return NULL if it doesn't exist
  76  * @return NULL if extend is false and it doesn't exist, a callerid_data instance otherwise.
  77  */
  78 callerid_data* GetData(User* who, bool extend = true)
  79 {
  80         callerid_data* dat;
  81         if (who->GetExt("callerid_data", dat))
  82                 return dat;
  83         else
  84         {
  85                 if (extend)
  86                 {
  87                         dat = new callerid_data;
  88                         who->Extend("callerid_data", dat);
  89                         return dat;
  90                 }
  91                 else
  92                         return NULL;
  93         }
  94 }
  95
  96 void RemoveData(User* who)
  97 {
  98         callerid_data* dat;
  99         who->GetExt("callerid_data", dat);
 100
 101         if (!dat)
 102                 return;
 103
 104         // We need to walk the list of users on our accept list, and remove ourselves from their wholistsme.
 105         for (std::set<User *>::iterator it = dat->accepting.begin(); it != dat->accepting.end(); it++)
 106         {
 107                 callerid_data *targ = GetData(*it, false);
 108
 109                 if (!targ)
 110                         continue; // shouldn't happen, but oh well.
 111
 112                 for (std::list<callerid_data *>::iterator it2 = targ->wholistsme.begin(); it2 != targ->wholistsme.end(); it2++)
 113                 {
 114                         if (*it2 == dat)
 115                         {
 116                                 targ->wholistsme.erase(it2);
 117                                 break;
 118                         }
 119                 }
 120         }
 121
 122         who->Shrink("callerid_data");
 123         delete dat;
 124 }
 125
 126
 127 class User_g : public SimpleUserModeHandler
 128 {
 129 public:
 130         User_g(InspIRCd* Instance, Module* Creator) : SimpleUserModeHandler(Instance, Creator, 'g') { }
 131 };
 132
 133 class CommandAccept : public Command
 134 {
 135 public:
 136         unsigned int maxaccepts;
 137         CommandAccept(InspIRCd* Instance, Module* Creator) : Command(Instance, Creator, "ACCEPT", 0, 1)
 138         {
 139                 syntax = "{[+|-]<nicks>}|*}";
 140                 TRANSLATE2(TR_CUSTOM, TR_END);
 141         }
 142
 143         virtual void EncodeParameter(std::string& parameter, int index)
 144         {
 145                 if (index != 0)
 146                         return;
 147                 std::string out = "";
 148                 irc::commasepstream nicks(parameter);
 149                 std::string tok;
 150                 while (nicks.GetToken(tok))
 151                 {
 152                         if (tok == "*")
 153                         {
 154                                 continue; // Drop list requests, since remote servers ignore them anyway.
 155                         }
 156                         if (!out.empty())
 157                                 out.append(",");
 158                         bool dash = false;
 159                         if (tok[0] == '-')
 160                         {
 161                                 dash = true;
 162                                 tok.erase(0, 1); // Remove the dash.
 163                         }
 164                         User* u = ServerInstance->FindNick(tok);
 165                         if (u)
 166                         {
 167                                 if (dash)
 168                                         out.append("-");
 169                                 out.append(u->uuid);
 170                         }
 171                         else
 172                         {
 173                                 if (dash)
 174                                         out.append("-");
 175                                 out.append(tok);
 176                         }
 177                 }
 178                 parameter = out;
 179         }
 180
 181         /** Will take any number of nicks (up to MaxTargets), which can be seperated by commas.
 182          * - in front of any nick removes, and an * lists. This effectively means you can do:
 183          * /accept nick1,nick2,nick3,*
 184          * to add 3 nicks and then show your list
 185          */
 186         CmdResult Handle(const std::vector<std::string> &parameters, User* user)
 187         {
 188                 if (ServerInstance->Parser->LoopCall(user, this, parameters, 0))
 189                         return CMD_SUCCESS;
 190                 /* Even if callerid mode is not set, we let them manage their ACCEPT list so that if they go +g they can
 191                  * have a list already setup. */
 192
 193                 std::string tok = parameters[0];
 194
 195                 if (tok == "*")
 196                 {
 197                         if (IS_LOCAL(user))
 198                                 ListAccept(user);
 199                         return CMD_LOCALONLY;
 200                 }
 201                 else if (tok[0] == '-')
 202                 {
 203                         User* whotoremove = ServerInstance->FindNick(tok.substr(1));
 204                         if (whotoremove)
 205                                 return (RemoveAccept(user, whotoremove, false) ? CMD_SUCCESS : CMD_FAILURE);
 206                         else
 207                                 return CMD_FAILURE;
 208                 }
 209                 else
 210                 {
 211                         User* whotoadd = ServerInstance->FindNick(tok[0] == '+' ? tok.substr(1) : tok);
 212                         if (whotoadd)
 213                                 return (AddAccept(user, whotoadd, false) ? CMD_SUCCESS : CMD_FAILURE);
 214                         else
 215                         {
 216                                 user->WriteNumeric(401, "%s %s :No such nick/channel", user->nick.c_str(), tok.c_str());
 217                                 return CMD_FAILURE;
 218                         }
 219                 }
 220         }
 221
 222         void ListAccept(User* user)
 223         {
 224                 callerid_data* dat = GetData(user, false);
 225                 if (dat)
 226                 {
 227                         for (std::set<User*>::iterator i = dat->accepting.begin(); i != dat->accepting.end(); ++i)
 228                                 user->WriteNumeric(281, "%s %s", user->nick.c_str(), (*i)->nick.c_str());
 229                 }
 230                 user->WriteNumeric(282, "%s :End of ACCEPT list", user->nick.c_str());
 231         }
 232
 233         bool AddAccept(User* user, User* whotoadd, bool quiet)
 234         {
 235                 // Add this user to my accept list first, so look me up..
 236                 callerid_data* dat = GetData(user, true);
 237                 if (dat->accepting.size() >= maxaccepts)
 238                 {
 239                         if (!quiet)
 240                                 user->WriteNumeric(456, "%s :Accept list is full (limit is %d)", user->nick.c_str(), maxaccepts);
 241
 242                         return false;
 243                 }
 244                 if (!dat->accepting.insert(whotoadd).second)
 245                 {
 246                         if (!quiet)
 247                                 user->WriteNumeric(457, "%s %s :is already on your accept list", user->nick.c_str(), whotoadd->nick.c_str());
 248
 249                         return false;
 250                 }
 251
 252                 // Now, look them up, and add me to their list
 253                 callerid_data *targ = GetData(whotoadd, true);
 254                 targ->wholistsme.push_back(dat);
 255
 256                 user->WriteServ("NOTICE %s :%s is now on your accept list", user->nick.c_str(), whotoadd->nick.c_str());
 257                 return true;
 258         }
 259
 260         bool RemoveAccept(User* user, User* whotoremove, bool quiet)
 261         {
 262                 // Remove them from my list, so look up my list..
 263                 callerid_data* dat = GetData(user, false);
 264                 if (!dat)
 265                 {
 266                         if (!quiet)
 267                                 user->WriteNumeric(458, "%s %s :is not on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
 268
 269                         return false;
 270                 }
 271                 std::set<User*>::iterator i = dat->accepting.find(whotoremove);
 272                 if (i == dat->accepting.end())
 273                 {
 274                         if (!quiet)
 275                                 user->WriteNumeric(458, "%s %s :is not on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
 276
 277                         return false;
 278                 }
 279
 280                 dat->accepting.erase(i);
 281
 282                 // Look up their list to remove me.
 283                 callerid_data *dat2 = GetData(whotoremove, false);
 284                 if (!dat2)
 285                 {
 286                         // How the fuck is this possible.
 287                         return false;
 288                 }
 289
 290                 for (std::list<callerid_data *>::iterator it = dat2->wholistsme.begin(); it != dat2->wholistsme.end(); it++)
 291                 {
 292                         // Found me!
 293                         if (*it == dat)
 294                         {
 295                                 dat2->wholistsme.erase(it);
 296                                 break;
 297                         }
 298                 }
 299
 300                 user->WriteServ("NOTICE %s :%s is no longer on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
 301                 return true;
 302         }
 303 };
 304
 305 class ModuleCallerID : public Module
 306 {
 307 private:
 308         CommandAccept mycommand;
 309         User_g myumode;
 310
 311         // Configuration variables:
 312         bool operoverride; // Operators can override callerid.
 313         bool tracknick; // Allow ACCEPT entries to update with nick changes.
 314         unsigned int notify_cooldown; // Seconds between notifications.
 315
 316         /** Removes a user from all accept lists
 317          * @param who The user to remove from accepts
 318          */
 319         void RemoveFromAllAccepts(User* who)
 320         {
 321                 // First, find the list of people who have me on accept
 322                 callerid_data *userdata = GetData(who, false);
 323                 if (!userdata)
 324                         return;
 325
 326                 // Iterate over the list of people who accept me, and remove all entries
 327                 for (std::list<callerid_data *>::iterator it = userdata->wholistsme.begin(); it != userdata->wholistsme.end(); it++)
 328                 {
 329                         callerid_data *dat = *(it);
 330
 331                         // Find me on their callerid list
 332                         std::set<User *>::iterator it2 = dat->accepting.find(who);
 333
 334                         if (it2 != dat->accepting.end())
 335                                 dat->accepting.erase(it2);
 336                 }
 337
 338                 userdata->wholistsme.clear();
 339         }
 340
 341 public:
 342         ModuleCallerID(InspIRCd* Me) : Module(Me), mycommand(Me, this), myumode(Me, this)
 343         {
 344                 OnRehash(NULL);
 345
 346                 if (!ServerInstance->Modes->AddMode(&myumode))
 347                         throw ModuleException("Could not add usermode +g");
 348
 349                 ServerInstance->AddCommand(&mycommand);
 350
 351                 Implementation eventlist[] = { I_OnRehash, I_OnUserPreNick, I_OnUserQuit, I_On005Numeric, I_OnUserPreNotice, I_OnUserPreMessage, I_OnCleanup };
 352                 ServerInstance->Modules->Attach(eventlist, this, 7);
 353         }
 354
 355         virtual ~ModuleCallerID()
 356         {
 357                 ServerInstance->Modes->DelMode(&myumode);
 358         }
 359
 360         virtual Version GetVersion()
 361         {
 362                 return Version("$Id$", VF_COMMON | VF_VENDOR, API_VERSION);
 363         }
 364
 365         virtual void On005Numeric(std::string& output)
 366         {
 367                 output += " CALLERID=g";
 368         }
 369
 370         ModResult PreText(User* user, User* dest, std::string& text, bool notice)
 371         {
 372                 if (!dest->IsModeSet('g'))
 373                         return MOD_RES_PASSTHRU;
 374
 375                 if (operoverride && IS_OPER(user))
 376                         return MOD_RES_PASSTHRU;
 377
 378                 callerid_data* dat = GetData(dest, true);
 379                 std::set<User*>::iterator i = dat->accepting.find(user);
 380
 381                 if (i == dat->accepting.end())
 382                 {
 383                         time_t now = ServerInstance->Time();
 384                         /* +g and *not* accepted */
 385                         user->WriteNumeric(716, "%s %s :is in +g mode (server-side ignore).", user->nick.c_str(), dest->nick.c_str());
 386                         if (now > (dat->lastnotify + (time_t)notify_cooldown))
 387                         {
 388                                 user->WriteNumeric(717, "%s %s :has been informed that you messaged them.", user->nick.c_str(), dest->nick.c_str());
 389                                 if (IS_LOCAL(dest))
 390                                 {
 391                                         dest->WriteNumeric(718, "%s %s %s@%s :is messaging you, and you have umode +g. Use /ACCEPT +%s to allow.", dest->nick.c_str(), user->nick.c_str(), user->ident.c_str(), user->dhost.c_str(), user->nick.c_str());
 392                                 }
 393                                 else
 394                                 {
 395                                         ServerInstance->PI->PushToClient(dest, std::string("::") + ServerInstance->Config->ServerName + " 718 " + dest->nick + " " + user->nick + " " + user->ident + "@" + user->dhost + " :is messaging you,  and you have umode +g. Use /ACCEPT +" + user->nick + " to allow.");
 396                                 }
 397                                 dat->lastnotify = now;
 398                         }
 399                         return MOD_RES_DENY;
 400                 }
 401                 return MOD_RES_PASSTHRU;
 402         }
 403
 404         virtual ModResult OnUserPreMessage(User* user, void* dest, int target_type, std::string& text, char status, CUList &exempt_list)
 405         {
 406                 if (IS_LOCAL(user) && target_type == TYPE_USER)
 407                         return PreText(user, (User*)dest, text, true);
 408
 409                 return MOD_RES_PASSTHRU;
 410         }
 411
 412         virtual ModResult OnUserPreNotice(User* user, void* dest, int target_type, std::string& text, char status, CUList &exempt_list)
 413         {
 414                 if (IS_LOCAL(user) && target_type == TYPE_USER)
 415                         return PreText(user, (User*)dest, text, true);
 416
 417                 return MOD_RES_PASSTHRU;
 418         }
 419
 420         virtual void OnCleanup(int type, void* item)
 421         {
 422                 if (type != TYPE_USER)
 423                         return;
 424
 425                 User* u = (User*)item;
 426                 /* Cleanup only happens on unload (before dtor), so keep this O(n) instead of O(n^2) which deferring to OnUserQuit would do.  */
 427                 RemoveData(u);
 428         }
 429
 430         virtual void OnSyncUser(User* user, Module* proto, void* opaque)
 431         {
 432                 callerid_data* dat = GetData(user, false);
 433                 if (dat)
 434                 {
 435                         std::string str = dat->ToString(proto);
 436                         proto->ProtoSendMetaData(opaque, user, "callerid_data", str);
 437                 }
 438         }
 439
 440         virtual void OnDecodeMetaData(Extensible* target, const std::string& extname, const std::string& extdata)
 441         {
 442                 User* u = dynamic_cast<User*>(target);
 443                 if (u && extname == "callerid_data")
 444                 {
 445                         callerid_data* dat = new callerid_data(extdata, ServerInstance);
 446                         u->Extend("callerid_data", dat);
 447                 }
 448         }
 449
 450         virtual ModResult OnUserPreNick(User* user, const std::string& newnick)
 451         {
 452                 if (!tracknick)
 453                         RemoveFromAllAccepts(user);
 454                 return MOD_RES_PASSTHRU;
 455         }
 456
 457         virtual void OnUserQuit(User* user, const std::string& message, const std::string& oper_message)
 458         {
 459                 RemoveFromAllAccepts(user);
 460                 RemoveData(user);
 461         }
 462
 463         virtual void OnRehash(User* user)
 464         {
 465                 ConfigReader Conf(ServerInstance);
 466                 mycommand.maxaccepts = Conf.ReadInteger("callerid", "maxaccepts", "16", 0, true);
 467                 operoverride = Conf.ReadFlag("callerid", "operoverride", "0", 0);
 468                 tracknick = Conf.ReadFlag("callerid", "tracknick", "0", 0);
 469                 notify_cooldown = Conf.ReadInteger("callerid", "cooldown", "60", 0, true);
 470         }
 471 };
 472
 473 MODULE_INIT(ModuleCallerID)
 474
 475