/* * 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(&eth_pack_p->eth_dst, &(dst), ETH_ADDR_LEN);	\	memmove(&eth_pack_p->eth_src, &(src), ETH_ADDR_LEN);	\	eth_pack_p->eth_type = htons(type);			\} while (0)typedef struct eth_handle eth_t;__BEGIN_DECLSeth_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 */