/* * Copyright (c) 2000-2017 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Fundamental constants relating to ethernet. * */ #ifndef _NET_ETHERNET_H_ #define _NET_ETHERNET_H_ #include <sys/appleapiopts.h> #include <sys/types.h> /* u_ types */ /* * 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 /* * Mbuf adjust factor to force 32-bit alignment of IP header. * Drivers should do m_adj(m, ETHER_ALIGN) when setting up a * receive so the upper layers get the IP header properly aligned * past the 14-byte Ethernet header. */ #define ETHER_ALIGN 2 /* driver adjust for IP hdr alignment */ /* * 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. */ typedef struct ether_header { u_char ether_dhost[ETHER_ADDR_LEN]; u_char ether_shost[ETHER_ADDR_LEN]; u_short ether_type; } ether_header_t; /* * Structure of a 48-bit Ethernet address. */ typedef struct ether_addr { u_char octet[ETHER_ADDR_LEN]; } ether_addr_t; #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_PAE 0x888e /* EAPOL PAE/802.1x */ #define ETHERTYPE_RSN_PREAUTH 0x88c7 /* 802.11i / RSN Pre-Authentication */ #define ETHERTYPE_PTP 0x88f7 /* IEEE 1588 Precision Time Protocol */ #define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */ /* XXX - add more useful types here */ #define ETHERTYPE_IEEE802154 0x0809 /* 802.15.4 */ /* * 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_PRIVATE /* * The following are used by ethernet interfaces. */ struct ether_addr *ether_aton(const char *); #ifdef BSD_KERNEL_PRIVATE extern u_char etherbroadcastaddr[ETHER_ADDR_LEN]; #if defined (__arm__) #include <string.h> static __inline__ int _ether_cmp(const void * a, const void * b) { return memcmp(a, b, ETHER_ADDR_LEN); } #else /* __arm__ */ static __inline__ int _ether_cmp(const void * a, const void * b) { const u_int16_t * a_s = (const u_int16_t *)a; const u_int16_t * b_s = (const u_int16_t *)b; if (a_s[0] != b_s[0] || a_s[1] != b_s[1] || a_s[2] != b_s[2]) { return 1; } return 0; } #endif /* __arm__ */ #endif /* BSD_KERNEL_PRIVATE */ #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */ #endif /* KERNEL_PRIVATE */ #ifndef KERNEL #include <sys/cdefs.h> /* * Ethernet address conversion/parsing routines. */ __BEGIN_DECLS int ether_hostton(const char *, struct ether_addr *); int ether_line(const char *, struct ether_addr *, char *); char *ether_ntoa(const struct ether_addr *); struct ether_addr *ether_aton(const char *); int ether_ntohost(char *, const struct ether_addr *); __END_DECLS #endif /* !KERNEL */ #endif /* !_NET_ETHERNET_H_ */