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深入分析驴子系列(1)

作者 佚名技术 来源 程序设计 浏览 发布时间 2012-06-29
   else
          {
             DebugLogError(LOG_STATUSBAR, _T("%hs: Backlogcounter says %u connections waiting, Accept() says %s - setting counter to zero!"), __FUNCTION__, m_nPendingConnections, GetErrorMessage(nError, 1));
              nFataErrors++;
           }
           if (nFataErrors > 10){
             // the question is what todo on a error. We cant just ignore it because then the backlog will fill up
             // and lock everything. We can also just endlos try to repeat it because this will lock up eMule
              // this should basically never happen anyway
              // however if we are in such a position, try to reinitalize the socket.
             DebugLogError(LOG_STATUSBAR, _T("%hs: Accept() Error Loop, recreating socket"), __FUNCTION__);
              Close();
             StartListening();
              m_nPendingConnections = 0;
             break;
           }
           continue;
          }
    
         AddConnection();
         if (SockAddr.sin_addr.S_un.S_addr == 0) // for safety..
         {
           iSockAddrLen = sizeof SockAddr;
            newclient->GetPeerName((SOCKADDR*)&SockAddr, &iSockAddrLen);
           DebugLogWarning(_T ("SockAddr.sin_addr.S_un.S_addr == 0; GetPeerName returned %s"), ipstr(SockAddr.sin_addr.S_un.S_addr));
         }
          ASSERT( SockAddr.sin_addr.S_un.S_addr != 0 && SockAddr.sin_addr.S_un.S_addr != INADDR_NONE );
         if (theApp.ipfilter->IsFiltered(SockAddr.sin_addr.S_un.S_addr))
         {
           if (thePrefs.GetLogFilteredIPs())
              AddDebugLogLine(false, _T("Rejecting connection attempt (IP=%s) - IP filter (%s)"), ipstr(SockAddr.sin_addr.S_un.S_addr), theApp.ipfilter->GetLastHit());
           newclient- >Safe_Delete();
           theStats.filteredclients++;
           continue;
         }
         if (theApp.clientlist->IsBannedClient(SockAddr.sin_addr.S_un.S_addr))
        {
           if (thePrefs.GetLogBannedClients())
          {
             CUpDownClient* pClient = theApp.clientlist->FindClientByIP(SockAddr.sin_addr.S_un.S_addr);
             AddDebugLogLine(false, _T("Rejecting connection attempt of banned client %s %s"), ipstr(SockAddr.sin_addr.S_un.S_addr), pClient->DbgGetClientInfo());
           }
            newclient->Safe_Delete();
           continue;
         }
      }
      newclient->AsyncSelect (FD_WRITE | FD_READ | FD_CLOSE);
    }
    ASSERT( m_nPendingConnections >= 0 );
  }
}

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