| 1 | #ifndef TCP_DISSECTOR_H |
|---|
| 2 | #define TCP_DISSECTOR_H |
|---|
| 3 | |
|---|
| 4 | #include "Dissector.h" |
|---|
| 5 | #include <string> |
|---|
| 6 | |
|---|
| 7 | class TcpDissector : public Dissector { |
|---|
| 8 | |
|---|
| 9 | public: |
|---|
| 10 | TcpDissector(); |
|---|
| 11 | virtual ~TcpDissector(); |
|---|
| 12 | virtual TcpDissector * Clone() const; |
|---|
| 13 | virtual bool Dissect(const unsigned char * pData, const ssize_t nDataLen); |
|---|
| 14 | virtual bool NeedReassembly() const; |
|---|
| 15 | virtual bool Reassemble(Dissector * pDissector, ProtocolInfo * pProtocolInfo); |
|---|
| 16 | virtual const EProtocolType GetUpperLayerType() const; |
|---|
| 17 | |
|---|
| 18 | private: |
|---|
| 19 | struct TcpHeader { |
|---|
| 20 | unsigned short srcPort; // source port |
|---|
| 21 | unsigned short destPort; // destination port |
|---|
| 22 | unsigned int sequence; // sequence number - 32 bits |
|---|
| 23 | unsigned int acknowledge; // acknowledgement number - 32 bits |
|---|
| 24 | |
|---|
| 25 | unsigned char ns :1; //Nonce Sum Flag Added in RFC 3540. |
|---|
| 26 | unsigned char reservedPart1:3; //according to rfc |
|---|
| 27 | unsigned char dataOffset:4; //number of dwords in the TCP header. |
|---|
| 28 | |
|---|
| 29 | unsigned char fin :1; //Finish Flag |
|---|
| 30 | unsigned char syn :1; //Synchronise Flag |
|---|
| 31 | unsigned char rst :1; //Reset Flag |
|---|
| 32 | unsigned char psh :1; //Push Flag |
|---|
| 33 | unsigned char ack :1; //Acknowledgement Flag |
|---|
| 34 | unsigned char urg :1; //Urgent Flag |
|---|
| 35 | |
|---|
| 36 | unsigned char ecn :1; //ECN-Echo Flag |
|---|
| 37 | unsigned char cwr :1; //Congestion Window Reduced Flag |
|---|
| 38 | |
|---|
| 39 | unsigned short window; // window |
|---|
| 40 | unsigned short checksum; // checksum |
|---|
| 41 | unsigned short urgentPointer; // urgent pointer |
|---|
| 42 | }; |
|---|
| 43 | |
|---|
| 44 | TcpHeader * m_tcpHdr; |
|---|
| 45 | protected: |
|---|
| 46 | ProtocolInfoElement * CreateLayerInfo(); |
|---|
| 47 | }; |
|---|
| 48 | |
|---|
| 49 | #endif |
|---|
