/* * 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_ #include <sys/appleapiopts.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) #ifdef KERNEL #ifdef __APPLE_API_PRIVATE struct ether_addr *ether_aton __P((char *)); #endif /* __APPLE_API_PRIVATE */ #endif #ifndef 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_ */