1 files changed, 98 insertions, 0 deletions
diff --git a/sys/net/ethernet.h b/sys/net/ethernet.h
new file mode 100644
index 0000000..8e982d7
--- /dev/null
+++ b/sys/net/ethernet.h
@@ -0,0 +1,98 @@
+/*
+ * Fundamental constants relating to ethernet.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef _NET_ETHERNET_H_
+#define _NET_ETHERNET_H_
+
+/*
+ * The number of bytes in an ethernet (MAC) address.
+ */
+#define	ETHER_ADDR_LEN		6
+
+/*
+ * The number of bytes in the type field.
+ */
+#define	ETHER_TYPE_LEN		2
+
+/*
+ * The number of bytes in the trailing CRC field.
+ */
+#define	ETHER_CRC_LEN		4
+
+/*
+ * The length of the combined header.
+ */
+#define	ETHER_HDR_LEN		(ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
+
+/*
+ * The minimum packet length.
+ */
+#define	ETHER_MIN_LEN		64
+
+/*
+ * The maximum packet length.
+ */
+#define	ETHER_MAX_LEN		1518
+
+/*
+ * A macro to validate a length with
+ */
+#define	ETHER_IS_VALID_LEN(foo)	\
+	((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
+
+/*
+ * Structure of a 10Mb/s Ethernet header.
+ */
+struct	ether_header {
+	u_char	ether_dhost[ETHER_ADDR_LEN];
+	u_char	ether_shost[ETHER_ADDR_LEN];
+	u_short	ether_type;
+};
+
+/*
+ * Structure of a 48-bit Ethernet address.
+ */
+struct	ether_addr {
+	u_char octet[ETHER_ADDR_LEN];
+};
+
+#define	ETHERTYPE_PUP		0x0200	/* PUP protocol */
+#define	ETHERTYPE_IP		0x0800	/* IP protocol */
+#define	ETHERTYPE_ARP		0x0806	/* Addr. resolution protocol */
+#define	ETHERTYPE_REVARP	0x8035	/* reverse Addr. resolution protocol */
+#define	ETHERTYPE_VLAN		0x8100	/* IEEE 802.1Q VLAN tagging */
+#define	ETHERTYPE_IPV6		0x86dd	/* IPv6 */
+#define	ETHERTYPE_LOOPBACK	0x9000	/* used to test interfaces */
+/* XXX - add more useful types here */
+
+/*
+ * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
+ * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
+ * by an ETHER type (as given above) and then the (variable-length) header.
+ */
+#define	ETHERTYPE_TRAIL		0x1000		/* Trailer packet */
+#define	ETHERTYPE_NTRAILER	16
+
+#define	ETHERMTU	(ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
+#define	ETHERMIN	(ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+
+/*
+ * Ethernet address conversion/parsing routines.
+ */
+__BEGIN_DECLS
+struct	ether_addr *ether_aton __P((char *));
+int	ether_hostton __P((char *, struct ether_addr *));
+int	ether_line __P((char *, struct ether_addr *, char *));
+char 	*ether_ntoa __P((struct ether_addr *));
+int	ether_ntohost __P((char *, struct ether_addr *));
+__END_DECLS
+#endif /* !KERNEL */
+
+#endif /* !_NET_ETHERNET_H_ */