Implement protection from flood.

For ZNC-server connection

include/znc/Config.h

@@ -114,6 +114,16 @@ public:
 		return false;
 	}
 
+	bool FindDoubleEntry(const CString& sName, double& fRes, double fDefault = 0) {
+		CString s;
+		if (FindStringEntry(sName, s)) {
+			fRes = s.ToDouble();
+			return true;
+		}
+		fRes = fDefault;
+		return false;
+	}
+
 	bool FindSubConfig(const CString& sName, SubConfig& Config, bool bErase = true) {
 		SubConfigMap::iterator it = m_SubConfigs.find(sName);
 		if (it == m_SubConfigs.end()) {

include/znc/IRCNetwork.h

@@ -137,6 +137,11 @@ public:
 	void SetIdent(const CString& s);
 	void SetRealName(const CString& s);
 
+	double GetFloodRate() const { return m_fFloodRate; }
+	unsigned short int GetFloodBurst() const { return m_uFloodBurst; }
+	void SetFloodRate(double fFloodRate) { m_fFloodRate = fFloodRate; }
+	void SetFloodBurst(unsigned short int uFloodBurst) { m_uFloodBurst = uFloodBurst; }
+
 	CString ExpandString(const CString& sStr) const;
 	CString& ExpandString(const CString& sStr, CString& sRet) const;
 private:
@@ -170,6 +175,9 @@ protected:
 	CNick              m_IRCNick;
 	bool               m_bIRCAway;
 
+	double             m_fFloodRate; ///< Set to -1 to disable protection.
+	unsigned short int m_uFloodBurst;
+
 	CBuffer            m_RawBuffer;
 	CBuffer            m_MotdBuffer;
 	CBuffer            m_QueryBuffer;

include/znc/IRCSock.h

@@ -13,6 +13,9 @@
 #include <znc/Socket.h>
 #include <znc/Nick.h>
 
+#include <deque>
+using std::deque;
+
 // Forward Declarations
 class CChan;
 class CUser;
@@ -54,6 +57,7 @@ public:
 	virtual void ReachedMaxBuffer();
 
 	void PutIRC(const CString& sLine);
+	void PutIRCQuick(const CString& sLine); //!< Should be used for PONG only
 	void ResetChans();
 	void Quit(const CString& sQuitMsg = "");
 
@@ -102,6 +106,7 @@ private:
 	// This is called when we connect and the nick we want is already taken
 	void SendAltNick(const CString& sBadNick);
 	void SendNextCap();
+	void TrySend();
 protected:
 	bool                                m_bAuthed;
 	bool                                m_bNamesx;
@@ -123,6 +128,13 @@ protected:
 	static const time_t                 m_uCTCPFloodTime;
 	static const unsigned int           m_uCTCPFloodCount;
 	MCString                            m_mISupport;
+	deque<CString>                      m_vsSendQueue;
+	short int                           m_iSendsAllowed;
+	unsigned short int                  m_uFloodBurst;
+	double                              m_fFloodRate;
+	bool                                m_bFloodProtection;
+
+	friend class CIRCFloodTimer;
 };
 
 #endif // !_IRCSOCK_H