1*1b8adde7SWilliam Kucharski #ifndef _IF_ETHER_H 2*1b8adde7SWilliam Kucharski #define _IF_ETHER_H 3*1b8adde7SWilliam Kucharski 4*1b8adde7SWilliam Kucharski /* 5*1b8adde7SWilliam Kucharski I'm moving towards the defined names in linux/if_ether.h for clarity. 6*1b8adde7SWilliam Kucharski The confusion between 60/64 and 1514/1518 arose because the NS8390 7*1b8adde7SWilliam Kucharski counts the 4 byte frame checksum in the incoming packet, but not 8*1b8adde7SWilliam Kucharski in the outgoing packet. 60/1514 are the correct numbers for most 9*1b8adde7SWilliam Kucharski if not all of the other NIC controllers. 10*1b8adde7SWilliam Kucharski */ 11*1b8adde7SWilliam Kucharski 12*1b8adde7SWilliam Kucharski #define ETH_ALEN 6 /* Size of Ethernet address */ 13*1b8adde7SWilliam Kucharski #define ETH_HLEN 14 /* Size of ethernet header */ 14*1b8adde7SWilliam Kucharski #define ETH_ZLEN 60 /* Minimum packet */ 15*1b8adde7SWilliam Kucharski #define ETH_FRAME_LEN 1514 /* Maximum packet */ 16*1b8adde7SWilliam Kucharski #define ETH_DATA_ALIGN 2 /* Amount needed to align the data after an ethernet header */ 17*1b8adde7SWilliam Kucharski #ifndef ETH_MAX_MTU 18*1b8adde7SWilliam Kucharski #define ETH_MAX_MTU (ETH_FRAME_LEN-ETH_HLEN) 19*1b8adde7SWilliam Kucharski #endif 20*1b8adde7SWilliam Kucharski 21*1b8adde7SWilliam Kucharski #endif /* _IF_ETHER_H */ 22