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
  16 #include "m_spanningtree/main.h"
  17 #include "m_spanningtree/utils.h"
  18 #include "m_spanningtree/treeserver.h"
  19 #include "m_spanningtree/link.h"
  20 #include "m_spanningtree/treesocket.h"
  21 #include "m_spanningtree/resolvers.h"
  22 #include "m_spanningtree/handshaketimer.h"
  23
  24 /* $ModDep: 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 m_spanningtree/handshaketimer.h */
  25
  26 bool TreeSocket::ParseUID(const std::string &source, std::deque<std::string> &params)
  27 {
  28         /** Do we have enough parameters:
  29          *      0    1    2    3    4    5        6        7     8        9       (n-1)
  30          * UID uuid age nick host dhost ident ip.string signon +modes (modepara) :gecos
  31          */
  32         if (params.size() < 10)
  33         {
  34                 if (!params.empty())
  35                         this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction ("+params[0]+" with only "+
  36                                         ConvToStr(params.size())+" of 10 or more parameters?)");
  37                 return true;
  38         }
  39
  40         time_t age_t = ConvToInt(params[1]);
  41         time_t signon = ConvToInt(params[7]);
  42         std::string empty;
  43
  44         TreeServer* remoteserver = Utils->FindServer(source);
  45
  46         if (!remoteserver)
  47         {
  48                 this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Unknown server "+source+")");
  49                 return true;
  50         }
  51         /* Check parameters for validity before introducing the client, discovered by dmb */
  52         else if (!age_t)
  53         {
  54                 this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Invalid TS?)");
  55                 return true;
  56         }
  57         else if (!signon)
  58         {
  59                 this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Invalid signon?)");
  60                 return true;
  61         }
  62         else if (params[8][0] != '+')
  63         {
  64                 this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Malformed MODE sequence?)");
  65                 return true;
  66         }
  67
  68         /* check for collision */
  69         user_hash::iterator iter = this->ServerInstance->Users->clientlist->find(params[2]);
  70
  71         if (iter != this->ServerInstance->Users->clientlist->end())
  72         {
  73                 /*
  74                  * Nick collision.
  75                  */
  76                 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s", params[2].c_str());
  77                 int collide = this->DoCollision(iter->second, age_t, params[5], params[8], params[0]);
  78
  79                 if (collide == 2)
  80                 {
  81                         /* remote client changed, make sure we change their nick for the hash too */
  82                         params[2] = params[0];
  83                 }
  84         }
  85
  86         /* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically
  87          * sets it up in the UUID hash for us.
  88          */
  89         User* _new = NULL;
  90         try
  91         {
  92                 _new = new User(this->ServerInstance, params[0]);
  93         }
  94         catch (...)
  95         {
  96                 SendError("Protocol violation - Duplicate UUID '" + params[0] + "' on introduction of new user");
  97                 return false;
  98         }
  99         (*(this->ServerInstance->Users->clientlist))[params[2]] = _new;
 100         _new->SetFd(FD_MAGIC_NUMBER);
 101         _new->nick.assign(params[2], 0, MAXBUF);
 102         _new->host.assign(params[3], 0, 64);
 103         _new->dhost.assign(params[4], 0, 64);
 104         _new->server = this->ServerInstance->FindServerNamePtr(remoteserver->GetName().c_str());
 105         _new->ident.assign(params[5], 0, MAXBUF);
 106         _new->fullname.assign(params[params.size() - 1], 0, MAXBUF);
 107         _new->registered = REG_ALL;
 108         _new->signon = signon;
 109         _new->age = age_t;
 110
 111         /* we need to remove the + from the modestring, so we can do our stuff */
 112         std::string::size_type pos_after_plus = params[8].find_first_not_of('+');
 113         if (pos_after_plus != std::string::npos)
 114         params[8] = params[8].substr(pos_after_plus);
 115
 116         unsigned int paramptr = 9;
 117         for (std::string::iterator v = params[8].begin(); v != params[8].end(); v++)
 118         {
 119                 if (*v == '+')
 120                         continue;
 121
 122                 /* For each mode thats set, increase counter */
 123                 ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
 124
 125                 if (mh)
 126                 {
 127                         if (mh->GetNumParams(true))
 128                         {
 129                                 /* IMPORTANT NOTE:
 130                                  * All modes are assumed to succeed here as they are being set by a remote server.
 131                                  * Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important
 132                                  * to note as all but one modules currently cannot ever fail in this situation, except for
 133                                  * m_servprotect which specifically works this way to prevent the mode being set ANYWHERE
 134                                  * but here, at client introduction. You may safely assume this behaviour is standard and
 135                                  * will not change in future versions if you want to make use of this protective behaviour
 136                                  * yourself.
 137                                  */
 138                                 if (paramptr < params.size() - 1)
 139                                         mh->OnModeChange(_new, _new, NULL, params[paramptr++], true);
 140                                 else
 141                                 {
 142                                         this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Broken UID command, expected a parameter for user mode '"+(*v)+"' but there aren't enough parameters in the command!");
 143                                         this->ServerInstance->Users->clientlist->erase(params[0]);
 144                                         delete _new;
 145                                         return true;
 146                                 }
 147                         }
 148                         else
 149                                 mh->OnModeChange(_new, _new, NULL, empty, true);
 150                         _new->SetMode(*v, true);
 151                         mh->ChangeCount(1);
 152                 }
 153                 else
 154                 {
 155                         this->WriteLine(std::string(":")+this->ServerInstance->Config->GetSID()+" KILL "+params[0]+" :Warning: Broken UID command, unknown user mode '"+(*v)+"' in the mode string!");
 156                         this->ServerInstance->Users->clientlist->erase(params[0]);
 157                         delete _new;
 158                         return true;
 159                 }
 160         }
 161
 162         //_new->ProcessNoticeMasks(params[7].c_str());
 163
 164         /* now we've done with modes processing, put the + back for remote servers */
 165         if (params[8][0] != '+')
 166                 params[8] = "+" + params[8];
 167
 168 #ifdef SUPPORT_IP6LINKS
 169         if (params[6].find_first_of(":") != std::string::npos)
 170                 _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
 171         else
 172 #endif
 173                 _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
 174
 175         ServerInstance->Users->AddGlobalClone(_new);
 176
 177         bool dosend = true;
 178
 179         if ((this->Utils->quiet_bursts && remoteserver->bursting) || this->ServerInstance->SilentULine(_new->server))
 180                 dosend = false;
 181
 182         if (dosend)
 183                 this->ServerInstance->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());
 184
 185         params[params.size() - 1] = ":" + params[params.size() - 1];
 186         Utils->DoOneToAllButSender(source, "UID", params, source);
 187
 188         ServerInstance->PI->Introduce(_new);
 189         FOREACH_MOD_I(ServerInstance,I_OnPostConnect,OnPostConnect(_new));
 190
 191         return true;
 192 }
 193