323416489d
- C++ should be supported for application functions (use __BEGIN_DECLS, etc.). - prototypes should be sorted. - comments on #endif's should spell identifiers the same as the code. - comments on #endif's should have the same sense as the code (use `!' to match ifndef, etc.).
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*
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* Fundamental constants relating to ethernet.
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*
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* $Id: ethernet.h,v 1.4 1996/12/19 15:42:52 wollman Exp $
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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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/*
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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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* 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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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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};
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/*
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* Structure of a 48-bit Ethernet address.
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*/
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struct ether_addr {
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u_char octet[ETHER_ADDR_LEN];
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};
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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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struct ether_addr *ether_aton __P((char *));
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int ether_hostton __P((char *, struct ether_addr *));
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int ether_line __P((char *, struct ether_addr *, char *));
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char *ether_ntoa __P((struct ether_addr *));
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int ether_ntohost __P((char *, struct ether_addr *));
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__END_DECLS
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#endif /* !KERNEL */
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#endif /* !_NET_ETHERNET_H_ */
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