src/modules/m_spanningtree/uid.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 #include "inspircd.h"
  15 #include "commands/cmd_whois.h"
  16 #include "commands/cmd_stats.h"
  17 #include "socket.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "transport.h"
  21 #include "m_hash.h"
  22 #include "socketengine.h"
  23
  24 #include "m_spanningtree/main.h"
  25 #include "m_spanningtree/utils.h"
  26 #include "m_spanningtree/treeserver.h"
  27 #include "m_spanningtree/link.h"
  28 #include "m_spanningtree/treesocket.h"
  29 #include "m_spanningtree/resolvers.h"
  30 #include "m_spanningtree/handshaketimer.h"
  31
  32 /* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h */
  33
  34 bool TreeSocket::ParseUID(const std::string &source, std::deque<std::string> &params)
  35 {
  36         /** Do we have enough parameters:
  37          * UID uuid age nick host dhost ident +modestr ip.string :gecos
  38          */
  39         if (params.size() != 10)
  40         {
  41                 if (!params.empty())
  42                         this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction ("+params[0]+" with only "+
  43                                         ConvToStr(params.size())+" of 10 parameters?)");
  44                 return true;
  45         }
  46
  47         time_t age_t = ConvToInt(params[1]);
  48         time_t signon = ConvToInt(params[8]);
  49         const char* tempnick = params[2].c_str();
  50         std::string empty;
  51
  52         /* XXX probably validate UID length too -- w00t */
  53         cmd_validation valid[] = { {"Nickname", 2, NICKMAX}, {"Hostname", 3, 64}, {"Displayed hostname", 4, 64}, {"Ident", 5, IDENTMAX + 1}, {"GECOS", 9, MAXGECOS}, {"", 0, 0} };
  54
  55         TreeServer* remoteserver = Utils->FindServer(source);
  56
  57         if (!remoteserver)
  58         {
  59                 this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Unknown server "+source+")");
  60                 return true;
  61         }
  62
  63         /* Check parameters for validity before introducing the client, discovered by dmb */
  64         if (!age_t)
  65         {
  66                 this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Invalid TS?)");
  67                 return true;
  68         }
  69
  70         for (size_t x = 0; valid[x].length; ++x)
  71         {
  72                 if (params[valid[x].param].length() > valid[x].length)
  73                 {
  74                         this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (" + valid[x].item + " > " + ConvToStr(valid[x].length) + ")");
  75                         return true;
  76                 }
  77         }
  78
  79
  80         /* check for collision */
  81         user_hash::iterator iter = this->Instance->Users->clientlist->find(tempnick);
  82
  83         if (iter != this->Instance->Users->clientlist->end())
  84         {
  85                 /*
  86                  * Nick collision.
  87                  */
  88                 Instance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s", tempnick);
  89                 int collide = this->DoCollision(iter->second, age_t, params[5], params[7], params[0]);
  90
  91                 if (collide == 2)
  92                 {
  93                         /* remote client changed, make sure we change their nick for the hash too */
  94                         tempnick = params[0].c_str();
  95                         params[2] = params[0];
  96                 }
  97         }
  98
  99         /* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically
 100          * sets it up in the UUID hash for us.
 101          */
 102         User* _new = NULL;
 103         try
 104         {
 105                 _new = new User(this->Instance, params[0]);
 106         }
 107         catch (...)
 108         {
 109                 SendError("Protocol violation - Duplicate UUID '" + params[0] + "' on introduction of new user");
 110                 return false;
 111         }
 112         (*(this->Instance->Users->clientlist))[tempnick] = _new;
 113         _new->SetFd(FD_MAGIC_NUMBER);
 114         _new->nick.assign(tempnick, NICKMAX - 1);
 115         _new->host.assign(params[3], 0, 64);
 116         _new->dhost.assign(params[4], 0, 64);
 117         _new->server = this->Instance->FindServerNamePtr(remoteserver->GetName().c_str());
 118         _new->ident.assign(params[5], 0, IDENTMAX + 1);
 119         _new->fullname.assign(params[9], 0, MAXGECOS);
 120         _new->registered = REG_ALL;
 121         _new->signon = signon;
 122         _new->age = age_t;
 123
 124         /* we need to remove the + from the modestring, so we can do our stuff */
 125         std::string::size_type pos_after_plus = params[6].find_first_not_of('+');
 126         if (pos_after_plus != std::string::npos)
 127         params[6] = params[6].substr(pos_after_plus);
 128
 129         for (std::string::iterator v = params[6].begin(); v != params[6].end(); v++)
 130         {
 131                 /* For each mode thats set, increase counter */
 132                 ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER);
 133
 134                 if (mh)
 135                 {
 136                         mh->OnModeChange(_new, _new, NULL, empty, true);
 137                         _new->SetMode(*v, true);
 138                         mh->ChangeCount(1);
 139                 }
 140         }
 141
 142         /* now we've done with modes processing, put the + back for remote servers */
 143         params[6] = "+" + params[6];
 144
 145 #ifdef SUPPORT_IP6LINKS
 146         if (params[7].find_first_of(":") != std::string::npos)
 147                 _new->SetSockAddr(AF_INET6, params[7].c_str(), 0);
 148         else
 149 #endif
 150                 _new->SetSockAddr(AF_INET, params[7].c_str(), 0);
 151
 152         Instance->Users->AddGlobalClone(_new);
 153
 154         bool dosend = true;
 155
 156         if ((this->Utils->quiet_bursts && remoteserver->bursting) || this->Instance->SilentULine(_new->server))
 157                 dosend = false;
 158
 159         if (dosend)
 160                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s] [%s]", _new->server, _new->nick.c_str(), _new->ident.c_str(), _new->host.c_str(), _new->GetIPString(), _new->fullname.c_str());
 161
 162         params[9] = ":" + params[9];
 163         Utils->DoOneToAllButSender(source, "UID", params, source);
 164
 165         FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
 166
 167         return true;
 168 }
 169