/*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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