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