src/usermanager.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDusermanager */
  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::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
  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->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
  35                 return;
  36         }
  37
  38         Instance->Log(DEBUG,"New user fd: %d", socket);
  39
  40         int j = 0;
  41
  42         Instance->unregistered_count++;
  43
  44         char ipaddr[MAXBUF];
  45 #ifdef IPV6
  46         if (socketfamily == AF_INET6)
  47                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
  48         else
  49 #endif
  50         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
  51
  52         (*(Instance->clientlist))[New->uuid] = New;
  53
  54         /* The users default nick is their UUID */
  55         strlcpy(New->nick, New->uuid, NICKMAX - 1);
  56
  57         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
  58         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
  59         strcpy(New->ident, "unknown");
  60
  61         New->registered = REG_NONE;
  62         New->signon = Instance->Time() + Instance->Config->dns_timeout;
  63         New->lastping = 1;
  64
  65         New->SetSockAddr(socketfamily, ipaddr, port);
  66
  67         New->SetFd(socket);
  68
  69         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  70         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
  71                 New->dhost[j] = New->host[j] = *temp;
  72         New->dhost[j] = New->host[j] = 0;
  73
  74         Instance->Users->AddLocalClone(New);
  75         Instance->Users->AddGlobalClone(New);
  76
  77         /*
  78          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  79          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  80          */
  81         ConnectClass* i = New->SetClass();
  82
  83         if (!i)
  84         {
  85                 User::QuitUser(Instance, New, "Access denied by configuration");
  86                 return;
  87         }
  88
  89         /*
  90          * Check connect class settings and initialise settings into User.
  91          * This will be done again after DNS resolution. -- w00t
  92          */
  93         New->CheckClass();
  94
  95         Instance->local_users.push_back(New);
  96
  97         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
  98         {
  99                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 100                 User::QuitUser(Instance, New,"No more connections allowed");
 101                 return;
 102         }
 103
 104         /*
 105          * XXX -
 106          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 107          * its a pretty big but for the moment valid assumption:
 108          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 109          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 110          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 111          * which for the time being is a physical impossibility (even the largest networks dont have more
 112          * than about 10,000 users on ONE server!)
 113          */
 114 #ifndef WINDOWS
 115         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 116         {
 117                 User::QuitUser(Instance, New, "Server is full");
 118                 return;
 119         }
 120 #endif
 121         /*
 122          * even with bancache, we still have to keep User::exempt current.
 123          * besides that, if we get a positive bancache hit, we still won't fuck
 124          * them over if they are exempt. -- w00t
 125          */
 126         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 127
 128         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 129         {
 130                 if (!b->Type.empty() && !New->exempt)
 131                 {
 132                         /* user banned */
 133                         Instance->Log(DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 134                         if (*Instance->Config->MoronBanner)
 135                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 136                         User::QuitUser(Instance, New, b->Reason);
 137                         return;
 138                 }
 139                 else
 140                 {
 141                         Instance->Log(DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 142                 }
 143         }
 144         else
 145         {
 146                 if (!New->exempt)
 147                 {
 148                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 149
 150                         if (r)
 151                         {
 152                                 r->Apply(New);
 153                                 return;
 154                         }
 155                 }
 156         }
 157
 158         if (socket > -1)
 159         {
 160                 if (!Instance->SE->AddFd(New))
 161                 {
 162                         Instance->Log(DEBUG,"Internal error on new connection");
 163                         User::QuitUser(Instance, New, "Internal error handling connection");
 164                 }
 165         }
 166
 167         /* NOTE: even if dns lookups are *off*, we still need to display this.
 168          * BOPM and other stuff requires it.
 169          */
 170         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 171
 172         if (Instance->Config->NoUserDns)
 173         {
 174                 New->dns_done = true;
 175         }
 176         else
 177         {
 178                 New->StartDNSLookup();
 179         }
 180 }
 181
 182 void UserManager::AddLocalClone(User *user)
 183 {
 184         clonemap::iterator x = local_clones.find(user->GetIPString());
 185         if (x != local_clones.end())
 186                 x->second++;
 187         else
 188                 local_clones[user->GetIPString()] = 1;
 189 }
 190
 191 void UserManager::AddGlobalClone(User *user)
 192 {
 193         clonemap::iterator y = global_clones.find(user->GetIPString());
 194         if (y != global_clones.end())
 195                 y->second++;
 196         else
 197                 global_clones[user->GetIPString()] = 1;
 198 }
 199
 200 void UserManager::RemoveCloneCounts(User *user)
 201 {
 202         clonemap::iterator x = local_clones.find(user->GetIPString());
 203         if (x != local_clones.end())
 204         {
 205                 x->second--;
 206                 if (!x->second)
 207                 {
 208                         local_clones.erase(x);
 209                 }
 210         }
 211
 212         clonemap::iterator y = global_clones.find(user->GetIPString());
 213         if (y != global_clones.end())
 214         {
 215                 y->second--;
 216                 if (!y->second)
 217                 {
 218                         global_clones.erase(y);
 219                 }
 220         }
 221 }
 222
 223 unsigned long UserManager::GlobalCloneCount(User *user)
 224 {
 225         clonemap::iterator x = global_clones.find(user->GetIPString());
 226         if (x != global_clones.end())
 227                 return x->second;
 228         else
 229                 return 0;
 230 }
 231
 232 unsigned long UserManager::LocalCloneCount(User *user)
 233 {
 234         clonemap::iterator x = local_clones.find(user->GetIPString());
 235         if (x != local_clones.end())
 236                 return x->second;
 237         else
 238                 return 0;
 239 }