src/usermanager.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 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include "xline.h"
  18 #include "bancache.h"
  19
  20 /* add a client connection to the sockets list */
  21 void UserManager::AddUser(InspIRCd* Instance, int socket, int port, bool iscached, sockaddr* ip, const std::string &targetip)
  22 {
  23         /* NOTE: Calling this one parameter constructor for User automatically
  24          * allocates a new UUID and places it in the hash_map.
  25          */
  26         User* New = NULL;
  27         try
  28         {
  29                 New = new User(Instance);
  30         }
  31         catch (...)
  32         {
  33                 Instance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 Instance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  35                 return;
  36         }
  37
  38         char ipaddr[MAXBUF];
  39 #ifdef IPV6
  40         if (ip->sa_family == AF_INET6)
  41                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
  42         else
  43 #endif
  44                 inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
  45
  46         New->SetFd(socket);
  47         New->SetSockAddr(ip->sa_family, ipaddr, port);
  48
  49         /* Give each of the modules an attempt to hook the user for I/O */
  50         FOREACH_MOD_I(Instance, I_OnHookUserIO, OnHookUserIO(New, targetip));
  51
  52         if (New->GetIOHook())
  53         {
  54                 try
  55                 {
  56                         New->GetIOHook()->OnRawSocketAccept(socket, ipaddr, port);
  57                 }
  58                 catch (CoreException& modexcept)
  59                 {
  60                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  61                 }
  62         }
  63
  64         Instance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  65
  66         this->unregistered_count++;
  67
  68         (*(this->clientlist))[New->uuid] = New;
  69
  70         /* The users default nick is their UUID */
  71         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  72
  73         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
  74         New->ident.assign("unknown");
  75
  76         New->registered = REG_NONE;
  77         New->signon = Instance->Time() + Instance->Config->dns_timeout;
  78         New->lastping = 1;
  79
  80         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  81         New->dhost.assign(New->GetIPString(), 0, 64);
  82         New->host.assign(New->GetIPString(), 0, 64);
  83
  84         Instance->Users->AddLocalClone(New);
  85         Instance->Users->AddGlobalClone(New);
  86
  87         /*
  88          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  89          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  90          */
  91         ConnectClass* i = New->SetClass();
  92
  93         if (!i)
  94         {
  95                 this->QuitUser(New, "Access denied by configuration");
  96                 return;
  97         }
  98
  99         /*
 100          * Check connect class settings and initialise settings into User.
 101          * This will be done again after DNS resolution. -- w00t
 102          */
 103         New->CheckClass();
 104
 105         this->local_users.push_back(New);
 106
 107         if ((this->local_users.size() > Instance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)Instance->SE->GetMaxFds()))
 108         {
 109                 Instance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 110                 this->QuitUser(New,"No more connections allowed");
 111                 return;
 112         }
 113
 114         /*
 115          * even with bancache, we still have to keep User::exempt current.
 116          * besides that, if we get a positive bancache hit, we still won't fuck
 117          * them over if they are exempt. -- w00t
 118          */
 119         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 120
 121         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 122         {
 123                 if (!b->Type.empty() && !New->exempt)
 124                 {
 125                         /* user banned */
 126                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 127                         if (*Instance->Config->MoronBanner)
 128                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), Instance->Config->MoronBanner);
 129                         this->QuitUser(New, b->Reason);
 130                         return;
 131                 }
 132                 else
 133                 {
 134                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 135                 }
 136         }
 137         else
 138         {
 139                 if (!New->exempt)
 140                 {
 141                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 142
 143                         if (r)
 144                         {
 145                                 r->Apply(New);
 146                                 return;
 147                         }
 148                 }
 149         }
 150
 151         if (!Instance->SE->AddFd(New))
 152         {
 153                 Instance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 154                 this->QuitUser(New, "Internal error handling connection");
 155         }
 156
 157         /* NOTE: even if dns lookups are *off*, we still need to display this.
 158          * BOPM and other stuff requires it.
 159          */
 160         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 161
 162         if (Instance->Config->NoUserDns)
 163         {
 164                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 165                 New->dns_done = true;
 166         }
 167         else
 168         {
 169                 New->StartDNSLookup();
 170         }
 171 }
 172
 173 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 174 {
 175         if (user->quitting)
 176         {
 177                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 178                 return;
 179         }
 180
 181         user->quitting = true;
 182
 183         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s '%s'", user->nick.c_str(), quitreason.c_str());
 184         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 185
 186         user->quietquit = false;
 187         user->quitmsg = quitreason;
 188
 189         std::string reason;
 190         std::string oper_reason;
 191         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 192         if (!*operreason)
 193         {
 194                 user->operquitmsg = quitreason;
 195                 oper_reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 196         }
 197         else
 198         {
 199                 user->operquitmsg = operreason;
 200                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 201         }
 202
 203         ServerInstance->GlobalCulls.AddItem(user);
 204
 205         if (user->registered == REG_ALL)
 206         {
 207                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 208                 user->PurgeEmptyChannels();
 209                 user->WriteCommonQuit(reason, oper_reason);
 210         }
 211
 212         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 213
 214         // Move the user onto their UID, to allow nick to be reused immediately
 215         user->UpdateNickHash(user->uuid.c_str());
 216 }
 217
 218
 219 void UserManager::AddLocalClone(User *user)
 220 {
 221         int range = 32;
 222         clonemap::iterator x;
 223         switch (user->GetProtocolFamily())
 224         {
 225                 case AF_INET6:
 226                         range = ServerInstance->Config->c_ipv6_range;
 227                 break;
 228                 case AF_INET:
 229                         range = ServerInstance->Config->c_ipv4_range;
 230                 break;
 231         }
 232
 233         x = local_clones.find(user->GetCIDRMask(range));
 234         if (x != local_clones.end())
 235                 x->second++;
 236         else
 237                 local_clones[user->GetCIDRMask(range)] = 1;
 238 }
 239
 240 void UserManager::AddGlobalClone(User *user)
 241 {
 242         int range = 32;
 243         clonemap::iterator x;
 244         switch (user->GetProtocolFamily())
 245         {
 246                 case AF_INET6:
 247                         range = ServerInstance->Config->c_ipv6_range;
 248                 break;
 249                 case AF_INET:
 250                         range = ServerInstance->Config->c_ipv4_range;
 251                 break;
 252         }
 253
 254         x = global_clones.find(user->GetCIDRMask(range));
 255         if (x != global_clones.end())
 256                 x->second++;
 257         else
 258                 global_clones[user->GetCIDRMask(range)] = 1;
 259 }
 260
 261 void UserManager::RemoveCloneCounts(User *user)
 262 {
 263         int range = 32;
 264         switch (user->GetProtocolFamily())
 265         {
 266                 case AF_INET6:
 267                         range = ServerInstance->Config->c_ipv6_range;
 268                 break;
 269                 case AF_INET:
 270                         range = ServerInstance->Config->c_ipv4_range;
 271                 break;
 272         }
 273
 274         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 275         if (x != local_clones.end())
 276         {
 277                 x->second--;
 278                 if (!x->second)
 279                 {
 280                         local_clones.erase(x);
 281                 }
 282         }
 283
 284         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 285         if (y != global_clones.end())
 286         {
 287                 y->second--;
 288                 if (!y->second)
 289                 {
 290                         global_clones.erase(y);
 291                 }
 292         }
 293 }
 294
 295 unsigned long UserManager::GlobalCloneCount(User *user)
 296 {
 297         int range = 32;
 298         switch (user->GetProtocolFamily())
 299         {
 300                 case AF_INET6:
 301                         range = ServerInstance->Config->c_ipv6_range;
 302                 break;
 303                 case AF_INET:
 304                         range = ServerInstance->Config->c_ipv4_range;
 305                 break;
 306         }
 307         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 308         if (x != global_clones.end())
 309                 return x->second;
 310         else
 311                 return 0;
 312 }
 313
 314 unsigned long UserManager::LocalCloneCount(User *user)
 315 {
 316         int range = 32;
 317         switch (user->GetProtocolFamily())
 318         {
 319                 case AF_INET6:
 320                         range = ServerInstance->Config->c_ipv6_range;
 321                 break;
 322                 case AF_INET:
 323                         range = ServerInstance->Config->c_ipv4_range;
 324                 break;
 325         }
 326         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 327         if (x != local_clones.end())
 328                 return x->second;
 329         else
 330                 return 0;
 331 }
 332
 333 /* this function counts all users connected, wether they are registered or NOT. */
 334 unsigned int UserManager::UserCount()
 335 {
 336         /*
 337          * XXX: Todo:
 338          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 339          *      -- w00t
 340          */
 341         return this->clientlist->size();
 342 }
 343
 344 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 345 unsigned int UserManager::RegisteredUserCount()
 346 {
 347         return this->clientlist->size() - this->UnregisteredUserCount();
 348 }
 349
 350 /* return how many users are opered */
 351 unsigned int UserManager::OperCount()
 352 {
 353         return this->all_opers.size();
 354 }
 355
 356 /* return how many users are unregistered */
 357 unsigned int UserManager::UnregisteredUserCount()
 358 {
 359         return this->unregistered_count;
 360 }
 361
 362 /* return how many local registered users there are */
 363 unsigned int UserManager::LocalUserCount()
 364 {
 365         /* Doesnt count unregistered clients */
 366         return (this->local_users.size() - this->UnregisteredUserCount());
 367 }
 368
 369 void UserManager::ServerNoticeAll(const char* text, ...)
 370 {
 371         if (!text)
 372                 return;
 373
 374         char textbuffer[MAXBUF];
 375         char formatbuffer[MAXBUF];
 376         va_list argsPtr;
 377         va_start (argsPtr, text);
 378         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 379         va_end(argsPtr);
 380
 381         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 382
 383         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 384         {
 385                 User* t = *i;
 386                 t->WriteServ(std::string(formatbuffer));
 387         }
 388 }
 389
 390 void UserManager::ServerPrivmsgAll(const char* text, ...)
 391 {
 392         if (!text)
 393                 return;
 394
 395         char textbuffer[MAXBUF];
 396         char formatbuffer[MAXBUF];
 397         va_list argsPtr;
 398         va_start (argsPtr, text);
 399         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 400         va_end(argsPtr);
 401
 402         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 403
 404         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 405         {
 406                 User* t = *i;
 407                 t->WriteServ(std::string(formatbuffer));
 408         }
 409 }
 410
 411 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 412 {
 413         char textbuffer[MAXBUF];
 414         int modelen;
 415         va_list argsPtr;
 416
 417         if (!text || !modes || !flags)
 418         {
 419                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 420                 return;
 421         }
 422
 423         va_start(argsPtr, text);
 424         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 425         va_end(argsPtr);
 426         modelen = strlen(modes);
 427
 428         if (flags == WM_AND)
 429         {
 430                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 431                 {
 432                         User* t = *i;
 433                         bool send_to_user = true;
 434
 435                         for (int n = 0; n < modelen; n++)
 436                         {
 437                                 if (!t->IsModeSet(modes[n]))
 438                                 {
 439                                         send_to_user = false;
 440                                         break;
 441                                 }
 442                         }
 443                         if (send_to_user)
 444                         {
 445                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 446                         }
 447                 }
 448         }
 449         else if (flags == WM_OR)
 450         {
 451                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 452                 {
 453                         User* t = *i;
 454                         bool send_to_user = false;
 455
 456                         for (int n = 0; n < modelen; n++)
 457                         {
 458                                 if (t->IsModeSet(modes[n]))
 459                                 {
 460                                         send_to_user = true;
 461                                         break;
 462                                 }
 463                         }
 464
 465                         if (send_to_user)
 466                         {
 467                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 468                         }
 469                 }
 470         }
 471 }
 472
 473 /* return how many users have a given mode e.g. 'a' */
 474 int UserManager::ModeCount(const char mode)
 475 {
 476         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 477
 478         if (mh)
 479                 return mh->GetCount();
 480         else
 481                 return 0;
 482 }