/*Ethernet  Header*/typedef struct tagEthernet_II_header{    BYTE byDA[6];    /*Destinate MAC*/    BYTE bySA[6];    /*Source MAC*/    WORD wType;      /*Type*/    }ETHERNET_HEADER_S,*PETHERNET_HEADER_S; /*UDP Packet Header*/typedef struct tagUDPPackerHeader{    WORD wSPort;    /*Source Port*/    WORD wDPort;    /*Destinate Port*/    WORD wLength;   /*UDP Length*/    WORD wCheckSum; /*UDP CheckSum*/}UDPPACKETHEADER_S,*PUDPPACKETHEADER_S; /*IP Packet Header*/typedef struct tagIPPackerHeader{    BYTE byHeadlen:4     /*head length*/    BYTE byVer:4         /*version*/        BYTE byTOS;          /*Type of Service*/    WORD wPacketLen;     /*Packet Length*/    WORD wSequence;      /*Sequence number*/    WORD wMarkFragPoi;   /**/        BYTE byTTL;          /*Time Life*/        BYTE byProtocolType; /*byProtocolype*/    WORD wHeadCheckSum;  /*Check Sum*/    DWORD dwIPSrc;       /*Source IP*/    DWORD dwIPDes;       /*Destinate IP*/}IPPACKETHEADER_S,*PIPPACKETHEADER_S; /*  PPP Packet Header*/typedef struct tagPPPPackerHeader{    BYTE byFrame;     /*Frame 0x7e*/    BYTE byAddress;  /*address 0xFF*/        BYTE byControl;  /*control 0x03*/    WORD wProtocal;  /*protocal 0021 c021 8021*/    }PPPPACKETHEADER_S,*PPPPPPACKETHEADER_S;

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