Limit the maximal read buffer space that is used for every socket

CSocket caches the data read from a socket and then looks for lines in there.
If there is no line end, this buffer can grow quite large. This patch now
closes sockets if they get a huge read buffer.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1233 726aef4b-f618-498e-8847-2d620e286838

Client.cpp

@@ -696,6 +696,14 @@ void CClient::Disconnected() {
 	MODULECALL(OnUserDetached(), m_pUser, this, );
 }
 
+void CClient::ReachedMaxBuffer() {
+	DEBUG_ONLY(cout << GetSockName() << " == ReachedMaxBuffer()" << endl);
+	if (IsAttached()) {
+		PutClient("ERROR :Closing link [Too long raw line]");
+	}
+	Close();
+}
+
 void CClient::IRCConnected(CIRCSock* pIRCSock) {
 	m_pIRCSock = pIRCSock;
 }