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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * Fundamental constants relating to ethernet.
- *
- */
-
- #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 ether_addr_octet octet
-
- #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)
-
- #if KERNEL
- struct ether_addr *ether_aton __P((char *));
- #endif
-
- #if !KERNEL
- #include <sys/cdefs.h>
-
- /*
- * Ethernet address conversion/parsing routines.
- */
- __BEGIN_DECLS
-
- 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_ */
-