www.pudn.com > Source_program.rar > ETHER.H

#ifndef BYTE 
#define BYTE unsigned char 
#endif 
#ifndef WORD 
#define WORD unsigned short 
#endif 
#ifndef LWORD 
#define LWORD unsigned long 
#endif 
 
/* Ensure network structures aren't padded (DJGPP and VC) */ 
#pragma pack(1) 
 
#define MACLEN      6           /* Ethernet (MAC) address length */ 
#define CRCLEN      4           /* Ethernet hardware CRC length */ 
#define BCASTADDR 0xff,0xff,0xff,0xff,0xff,0xff /* Broadcast address */ 
 
/* Ehernet hardware Rx frame length includes the trailing CRC */ 
#define MAXFRAMEC   1518        /* Maximum frame size (incl CRC) */ 
#define MINFRAMEC   64          /* Minimum frame size (incl CRC) */ 
 
/* Higher-level drivers exclude the CRC from the frame length */ 
#define MAXFRAME    1514        /* Maximum frame size (excl CRC) */ 
#define MINFRAME    60          /* Minimum frame size (excl CRC) */ 
 
/* Ethernet (DIX) header */ 
typedef struct { 
    BYTE dest[MACLEN];          /* Destination MAC address */ 
    BYTE srce[MACLEN];          /* Source MAC address */ 
    WORD ptype;                 /* Protocol type or length */ 
} ETHERHDR; 
 
/* Ethernet (DIX) frame; data size is frame size minus header & CRC */ 
#define ETHERMTU (MAXFRAME-sizeof(ETHERHDR)) 
typedef struct { 
    ETHERHDR h;                 /* Header */ 
    BYTE data[ETHERMTU];        /* Data */ 
    LWORD crc;                  /* CRC */ 
} ETHERFRAME; 
 
/* 802.3 SNAP header */ 
typedef struct { 
    WORD lsap;                  /* Link Service Access Point */ 
    BYTE ctrl;                  /* Control byte */ 
    BYTE oui[3];                /* Organisational Unit Identifier */ 
    WORD ptype;                 /* Protocol type */ 
} SNAPHDR; 
 
/* 802.3 SNAP frame */ 
#define SNAPMTU (ETHERMTU-sizeof(SNAPHDR)) 
typedef struct { 
    ETHERHDR e;                 /* Ethernet header (pcol is length) */ 
    SNAPHDR  s;                 /* 802.3 SNAP header */ 
    BYTE data[SNAPMTU];         /* Data */ 
    LWORD crc;                  /* CRC */ 
} SNAPFRAME; 
 
/* NE2000-compatible driver prototypes */ 
int init_etherne(WORD dtype, WORD baseaddr); 
void close_etherne(WORD dtype); 
BYTE *etherne_addr(WORD dtype); 
void poll_etherne(WORD dtype); 
WORD get_etherne(WORD dtype, void *pkt); 
WORD put_etherne(WORD dtype, void *pkt, WORD len); 
 
/* 3C509 driver prototypes */ 
int init_ether3c(WORD dtype, WORD baseaddr); 
void close_ether3c(WORD dtype); 
BYTE *ether3c_addr(WORD dtype); 
void poll_ether3c(WORD dtype); 
WORD get_ether3c(void *pkt); 
WORD put_ether3c(void *pkt, WORD len); 
 
/* EOF */