28 lines
1.0 KiB
C
28 lines
1.0 KiB
C
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#ifndef _IF_ETHER_H
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#define _IF_ETHER_H
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/*
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I'm moving towards the defined names in linux/if_ether.h for clarity.
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The confusion between 60/64 and 1514/1518 arose because the NS8390
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counts the 4 byte frame checksum in the incoming packet, but not
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in the outgoing packet. 60/1514 are the correct numbers for most
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if not all of the other NIC controllers.
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*/
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#define ETH_ALEN 6 /* Size of Ethernet address */
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#define ETH_HLEN 14 /* Size of ethernet header */
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#define ETH_ZLEN 60 /* Minimum packet */
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#define ETH_FRAME_LEN 1514 /* Maximum packet */
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#define ETH_DATA_ALIGN 2 /* Amount needed to align the data after an ethernet header */
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#ifndef ETH_MAX_MTU
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#define ETH_MAX_MTU (ETH_FRAME_LEN-ETH_HLEN)
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#endif
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#define ETH_P_IP 0x0800 /* Internet Protocl Packet */
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#define ETH_P_ARP 0x0806 /* Address Resolution Protocol */
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#define ETH_P_RARP 0x8035 /* Reverse Address resolution Protocol */
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#define ETH_P_IPV6 0x86DD /* IPv6 over blueblook */
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#define ETH_P_SLOW 0x8809 /* Ethernet slow protocols */
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#endif /* _IF_ETHER_H */
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