78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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/*
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* eth.h
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*
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* Ethernet.
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*
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* Copyright (c) 2000 Dug Song <dugsong@monkey.org>
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*
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* $Id: eth.h,v 1.15 2004/01/03 08:47:23 dugsong Exp $
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*/
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#ifndef DNET_ETH_H
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#define DNET_ETH_H
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#define ETH_ADDR_LEN 6
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#define ETH_ADDR_BITS 48
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#define ETH_TYPE_LEN 2
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#define ETH_CRC_LEN 4
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#define ETH_HDR_LEN 14
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#define ETH_LEN_MIN 64 /* minimum frame length with CRC */
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#define ETH_LEN_MAX 1518 /* maximum frame length with CRC */
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#define ETH_MTU (ETH_LEN_MAX - ETH_HDR_LEN - ETH_CRC_LEN)
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#define ETH_MIN (ETH_LEN_MIN - ETH_HDR_LEN - ETH_CRC_LEN)
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typedef struct eth_addr {
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uint8_t data[ETH_ADDR_LEN];
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} eth_addr_t;
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struct eth_hdr {
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eth_addr_t eth_dst; /* destination address */
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eth_addr_t eth_src; /* source address */
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uint16_t eth_type; /* payload type */
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};
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/*
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* Ethernet payload types - http://standards.ieee.org/regauth/ethertype
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*/
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#define ETH_TYPE_PUP 0x0200 /* PUP protocol */
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#define ETH_TYPE_IP 0x0800 /* IP protocol */
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#define ETH_TYPE_ARP 0x0806 /* address resolution protocol */
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#define ETH_TYPE_REVARP 0x8035 /* reverse addr resolution protocol */
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#define ETH_TYPE_8021Q 0x8100 /* IEEE 802.1Q VLAN tagging */
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#define ETH_TYPE_IPV6 0x86DD /* IPv6 protocol */
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#define ETH_TYPE_MPLS 0x8847 /* MPLS */
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#define ETH_TYPE_MPLS_MCAST 0x8848 /* MPLS Multicast */
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#define ETH_TYPE_PPPOEDISC 0x8863 /* PPP Over Ethernet Discovery Stage */
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#define ETH_TYPE_PPPOE 0x8864 /* PPP Over Ethernet Session Stage */
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#define ETH_TYPE_LOOPBACK 0x9000 /* used to test interfaces */
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#define ETH_IS_MULTICAST(ea) (*(ea) & 0x01) /* is address mcast/bcast? */
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#define ETH_ADDR_BROADCAST "\xff\xff\xff\xff\xff\xff"
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#define eth_pack_hdr(h, dst, src, type) do { \
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struct eth_hdr *eth_pack_p = (struct eth_hdr *)(h); \
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memmove(ð_pack_p->eth_dst, &(dst), ETH_ADDR_LEN); \
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memmove(ð_pack_p->eth_src, &(src), ETH_ADDR_LEN); \
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eth_pack_p->eth_type = htons(type); \
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} while (0)
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typedef struct eth_handle eth_t;
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__BEGIN_DECLS
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eth_t *eth_open(const char *device);
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int eth_get(eth_t *e, eth_addr_t *ea);
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int eth_set(eth_t *e, const eth_addr_t *ea);
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size_t eth_send(eth_t *e, const void *buf, size_t len);
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eth_t *eth_close(eth_t *e);
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char *eth_ntop(const eth_addr_t *eth, char *dst, size_t len);
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int eth_pton(const char *src, eth_addr_t *dst);
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char *eth_ntoa(const eth_addr_t *eth);
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#define eth_aton eth_pton
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__END_DECLS
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#endif /* DNET_ETH_H */
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