Gnutella Forums - View Single Post - Mad as hell and won't take vinnie anymore!

#2 (**permalink**) March 12th, 2002

Here it is, simply replace CGnuNode::ParseHandshake in the file "GnuNode.cpp" with the following and recompile! Add as many checks as you like for each $$$ client you would like to block. (4 total lines, two places to check the connect strings, added to the original code, see below)

Code:

/////////////////////////////////////////////////////////////////////////////
// New connections

bool CGnuNode::ParseHandshake(CString Data, byte* Stream, int StreamLength)
{
	int i;
	CString Handshake;
	CString NetworkName = m_pDoc->ModeNetwork;
	bool	Guerilla = false;

	// Making an inbound connect
	if(m_Inbound)
	{
		// Version 6
		if(Data.Find("\r\n\r\n") != -1)
		{
			Handshake = Data.Mid(0, Data.Find("\r\n\r\n") + 4);
			m_Handshake += Handshake;

			if(m_Handshake.Find("GUERILLA ") != -1)
			{
				NetworkName = "GUERILLA";
				Guerilla    = true;
			}

			// keep any BS off my screen
			if(Handshake.Find("BearShare") != -1) { Close(); return true; }


			// Connect string, GNUTELLA CONNECT/0.6\r\n
			if(Handshake.Find(NetworkName + " CONNECT/") != -1)
			{
				if(m_pPrefs->m_NetworkModel == NETWORK_PRIVATE && m_pPrefs->m_Lan)
					if(Handshake.Find("LAN: " + m_pPrefs->m_LanName + "\r\n") == -1)
					{
						Close();
						return true;
					}

				Send_ConnectOK(true, false, Guerilla);

				return true;
			}

			// Ok string, GNUTELLA/0.6 200 OK\r\n
			else if(Handshake.Find(" 200 OK\r\n") != -1)
			{
				SetConnected();

				// Stream begins
				for(i = 0; i < StreamLength - 4; i++)
					if(strncmp((char*) &Stream[i], "\r\n\r\n", 4) == 0)
					{
						m_dwExtraLength = StreamLength - (i + 4);
						memcpy(m_pExtra, &Stream[i + 4], m_dwExtraLength);
					}

				return true;
			}
		}

		// Version 4
		else if(Data.Find(VERSION_4_CONNECT) != -1 && !m_pPrefs->m_Lan)
		{
			m_Handshake += "GNUTELLA CONNECT/0.4\r\n";

			Send_ConnectOK(false, false, false);
			SetConnected();

			return true;
		}
	}

	// Making an outbound connect
	else
	{
		if((m_pDoc->ModeVersion6 || m_pPrefs->m_NetworkModel == NETWORK_PRIVATE) && Data.Find("\r\n\r\n") != -1)
		{
			Handshake = Data.Mid(0, Data.Find("\r\n\r\n") + 4);
			m_Handshake += Handshake;

			// Ok string, GNUTELLA/0.6 200 OK\r\n
			if(Handshake.Find(" 200 OK\r\n") != -1)
			{

			// keep any BS off my screen
			if(Handshake.Find("BearShare") != -1) { Close(); return true; }


				// Check if remote host has our IP
				int ipPos = Handshake.Find("Remote-IP: ");
				if(ipPos != -1)
				{
					ipPos  += 11;
					int ipBack = Handshake.Find("\r\n", ipPos);

					m_pPrefs->m_LocalHost = StrtoIP( Handshake.Mid(ipPos, ipBack - ipPos));
				}


				if(m_pPrefs->m_NetworkModel == NETWORK_PRIVATE && m_pPrefs->m_Lan)
					if(Handshake.Find("LAN: " + m_pPrefs->m_LanName + "\r\n") == -1)
					{
						Close();
						return true;
					}

				Send_ConnectOK(true, true, false);

				SetConnected();
			}
			else
				Close();

			return true;
		}
		else if(Data.Find(VERSION_4_CONNECT_OK) != -1)
		{
			m_Handshake += "GNUTELLA OK\r\n";

			// Stream begins
			for(i = 0; i < StreamLength - 2; i++)
				if(strncmp((char*) &Stream[i], "\n\n", 2) == 0)
				{
					m_dwExtraLength = StreamLength - (i + 2);
					memcpy(m_pExtra, &Stream[i + 2], m_dwExtraLength);
				}

			SetConnected();

			return true;
		}
	}

	return false;
}