190 lines
5.3 KiB
C
190 lines
5.3 KiB
C
/*
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* Copyright (c) 2000-2017 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Fundamental constants relating to ethernet.
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*
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*/
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#ifndef _NET_ETHERNET_H_
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#define _NET_ETHERNET_H_
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#ifndef DRIVERKIT
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#include <sys/appleapiopts.h>
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#include <sys/types.h> /* u_ types */
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#else
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#include <sys/_types.h>
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#include <sys/_types/_u_char.h>
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#include <sys/_types/_u_short.h>
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#endif /* DRIVERKIT */
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/*
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* The number of bytes in an ethernet (MAC) address.
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*/
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#define ETHER_ADDR_LEN 6
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/*
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* The number of bytes in the type field.
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*/
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#define ETHER_TYPE_LEN 2
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/*
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* The number of bytes in the trailing CRC field.
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*/
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#define ETHER_CRC_LEN 4
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/*
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* The length of the combined header.
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*/
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#define ETHER_HDR_LEN (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
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/*
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* The minimum packet length.
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*/
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#define ETHER_MIN_LEN 64
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/*
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* The maximum packet length.
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*/
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#define ETHER_MAX_LEN 1518
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/*
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* Mbuf adjust factor to force 32-bit alignment of IP header.
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* Drivers should do m_adj(m, ETHER_ALIGN) when setting up a
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* receive so the upper layers get the IP header properly aligned
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* past the 14-byte Ethernet header.
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*/
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#define ETHER_ALIGN 2 /* driver adjust for IP hdr alignment */
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/*
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* A macro to validate a length with
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*/
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#define ETHER_IS_VALID_LEN(foo) \
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((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
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/*
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* Structure of a 10Mb/s Ethernet header.
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*/
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typedef struct ether_header {
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u_char ether_dhost[ETHER_ADDR_LEN];
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u_char ether_shost[ETHER_ADDR_LEN];
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u_short ether_type;
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} ether_header_t;
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/*
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* Structure of a 48-bit Ethernet address.
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*/
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typedef struct ether_addr {
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u_char octet[ETHER_ADDR_LEN];
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} ether_addr_t;
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#define ether_addr_octet octet
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#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
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#define ETHERTYPE_IP 0x0800 /* IP protocol */
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#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
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#define ETHERTYPE_REVARP 0x8035 /* reverse Addr. resolution protocol */
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#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */
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#define ETHERTYPE_IPV6 0x86dd /* IPv6 */
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#define ETHERTYPE_PAE 0x888e /* EAPOL PAE/802.1x */
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#define ETHERTYPE_RSN_PREAUTH 0x88c7 /* 802.11i / RSN Pre-Authentication */
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#define ETHERTYPE_PTP 0x88f7 /* IEEE 1588 Precision Time Protocol */
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#define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */
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/* XXX - add more useful types here */
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/*
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* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
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* (type-ETHERTYPE_TRAIL)*512 bytes of data followed
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* by an ETHER type (as given above) and then the (variable-length) header.
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*/
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#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
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#define ETHERTYPE_NTRAILER 16
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#define ETHERMTU (ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
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#define ETHERMIN (ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
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#ifndef DRIVERKIT
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#ifdef KERNEL_PRIVATE
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/*
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* The following are used by ethernet interfaces.
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*/
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struct ether_addr *ether_aton(const char *);
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#ifdef BSD_KERNEL_PRIVATE
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extern u_char etherbroadcastaddr[ETHER_ADDR_LEN];
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#if defined (__arm__)
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#include <string.h>
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static __inline__ int
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_ether_cmp(const void * a, const void * b)
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{
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return memcmp(a, b, ETHER_ADDR_LEN);
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}
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#else /* __arm__ */
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static __inline__ int
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_ether_cmp(const void * a, const void * b)
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{
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const u_int16_t * a_s = (const u_int16_t *)a;
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const u_int16_t * b_s = (const u_int16_t *)b;
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if (a_s[0] != b_s[0]
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|| a_s[1] != b_s[1]
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|| a_s[2] != b_s[2]) {
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return 1;
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}
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return 0;
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}
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#endif /* __arm__ */
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#endif /* BSD_KERNEL_PRIVATE */
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#define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
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#endif /* KERNEL_PRIVATE */
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#ifndef KERNEL
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#include <sys/cdefs.h>
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/*
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* Ethernet address conversion/parsing routines.
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*/
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__BEGIN_DECLS
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int ether_hostton(const char *, struct ether_addr *);
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int ether_line(const char *, struct ether_addr *, char *);
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char *ether_ntoa(const struct ether_addr *);
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struct ether_addr *ether_aton(const char *);
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int ether_ntohost(char *, const struct ether_addr *);
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__END_DECLS
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#endif /* !KERNEL */
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#endif /* DRIVERKIT */
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#endif /* !_NET_ETHERNET_H_ */
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