1 #ifndef _IF_ETHER_H 2 #define _IF_ETHER_H 3 4 /* 5 I'm moving towards the defined names in linux/if_ether.h for clarity. 6 The confusion between 60/64 and 1514/1518 arose because the NS8390 7 counts the 4 byte frame checksum in the incoming packet, but not 8 in the outgoing packet. 60/1514 are the correct numbers for most 9 if not all of the other NIC controllers. 10 */ 11 12 #define ETH_ALEN 6 /* Size of Ethernet address */ 13 #define ETH_HLEN 14 /* Size of ethernet header */ 14 #define ETH_ZLEN 60 /* Minimum packet */ 15 #define ETH_FRAME_LEN 1514 /* Maximum packet */ 16 #define ETH_DATA_ALIGN 2 /* Amount needed to align the data after an ethernet header */ 17 #ifndef ETH_MAX_MTU 18 #define ETH_MAX_MTU (ETH_FRAME_LEN-ETH_HLEN) 19 #endif 20 21 #endif /* _IF_ETHER_H */ 22