30 struct Segment{  struct
39     Segment(void){}  in Segment()  function
45     bool IsValid(void) const { return header.magicNum==Header::MAGIC_NUMBER; }  in IsValid()
51     bool IsAck(void) const { return (header.controlBit & Header::BIT_ACK)!=0; }  in IsAck()
52     bool IsSyn(void) const { return (header.controlBit & Header::BIT_SYN)!=0; }  in IsSyn()
53     bool IsFin(void) const { return (header.controlBit & Header::BIT_FIN)!=0; }  in IsFin()
54     bool IsRst(void) const { return (header.controlBit & Header::BIT_RST)!=0; }  in IsRst()
59     void SetSyn(void) { header.controlBit |= Header::BIT_SYN; }  in SetSyn()
60     void SetFin(void) { header.controlBit |= Header::BIT_FIN; }  in SetFin()
61     void SetRst(void) { header.controlBit |= Header::BIT_RST; }  in SetRst()
63     void SetSrv(void) { header.controlBit |= Header::BIT_SRV; }  in SetSrv()
64     void SetCli(void) { header.controlBit |= Header::BIT_CLI; }  in SetCli()
69     u32  GetAckNumber(void) const { return header.ackNum; }  in GetAckNumber()
74     void SetAckNumber(u32 ack) { header.ackNum = ack; header.controlBit |= Header::BIT_ACK;}  in SetAckNumber()
79     u32  GetSeqNumber(void) const { return header.seqNum; }  in GetSeqNumber()
89     void SetSeqNumber(u32 seq) { header.seqNum = seq; }  in SetSeqNumber()
115     u32  GetSegmentLength(void) const;  argument
121     void SetWindowSize(u16 n) { header.windowSize = n; }  in SetWindowSize()
126     u16  GetWindowSize(void) const { return header.windowSize; }  in GetWindowSize()
148     Header header;
149     u8     payload[PAYLOAD_SIZE];