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