1/*
2 * Fundamental constants relating to ethernet.
3 *
| 1/*
2 * Fundamental constants relating to ethernet.
3 *
|
4 * $FreeBSD: head/sys/net/ethernet.h 55205 1999-12-29 04:46:21Z peter $
| 4 * $FreeBSD: head/sys/net/ethernet.h 62143 2000-06-26 23:34:54Z archie $
|
5 *
6 */
7
8#ifndef _NET_ETHERNET_H_
9#define _NET_ETHERNET_H_
10
11/*
12 * The number of bytes in an ethernet (MAC) address.
13 */
14#define ETHER_ADDR_LEN 6
15
16/*
17 * The number of bytes in the type field.
18 */
19#define ETHER_TYPE_LEN 2
20
21/*
22 * The number of bytes in the trailing CRC field.
23 */
24#define ETHER_CRC_LEN 4
25
26/*
27 * The length of the combined header.
28 */
29#define ETHER_HDR_LEN (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
30
31/*
32 * The minimum packet length.
33 */
34#define ETHER_MIN_LEN 64
35
36/*
37 * The maximum packet length.
38 */
39#define ETHER_MAX_LEN 1518
40
41/*
42 * A macro to validate a length with
43 */
44#define ETHER_IS_VALID_LEN(foo) \
45 ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
46
47/*
48 * Structure of a 10Mb/s Ethernet header.
49 */
50struct ether_header {
51 u_char ether_dhost[ETHER_ADDR_LEN];
52 u_char ether_shost[ETHER_ADDR_LEN];
53 u_short ether_type;
54};
55
56/*
57 * Structure of a 48-bit Ethernet address.
58 */
59struct ether_addr {
60 u_char octet[ETHER_ADDR_LEN];
61};
62
63#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
64#define ETHERTYPE_IP 0x0800 /* IP protocol */
65#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
66#define ETHERTYPE_REVARP 0x8035 /* reverse Addr. resolution protocol */
67#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */
68#define ETHERTYPE_IPV6 0x86dd /* IPv6 */
69#define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */
70/* XXX - add more useful types here */
71
72/*
73 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
74 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
75 * by an ETHER type (as given above) and then the (variable-length) header.
76 */
77#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
78#define ETHERTYPE_NTRAILER 16
79
80#define ETHERMTU (ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
81#define ETHERMIN (ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
82
| 5 *
6 */
7
8#ifndef _NET_ETHERNET_H_
9#define _NET_ETHERNET_H_
10
11/*
12 * The number of bytes in an ethernet (MAC) address.
13 */
14#define ETHER_ADDR_LEN 6
15
16/*
17 * The number of bytes in the type field.
18 */
19#define ETHER_TYPE_LEN 2
20
21/*
22 * The number of bytes in the trailing CRC field.
23 */
24#define ETHER_CRC_LEN 4
25
26/*
27 * The length of the combined header.
28 */
29#define ETHER_HDR_LEN (ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
30
31/*
32 * The minimum packet length.
33 */
34#define ETHER_MIN_LEN 64
35
36/*
37 * The maximum packet length.
38 */
39#define ETHER_MAX_LEN 1518
40
41/*
42 * A macro to validate a length with
43 */
44#define ETHER_IS_VALID_LEN(foo) \
45 ((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
46
47/*
48 * Structure of a 10Mb/s Ethernet header.
49 */
50struct ether_header {
51 u_char ether_dhost[ETHER_ADDR_LEN];
52 u_char ether_shost[ETHER_ADDR_LEN];
53 u_short ether_type;
54};
55
56/*
57 * Structure of a 48-bit Ethernet address.
58 */
59struct ether_addr {
60 u_char octet[ETHER_ADDR_LEN];
61};
62
63#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
64#define ETHERTYPE_IP 0x0800 /* IP protocol */
65#define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */
66#define ETHERTYPE_REVARP 0x8035 /* reverse Addr. resolution protocol */
67#define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */
68#define ETHERTYPE_IPV6 0x86dd /* IPv6 */
69#define ETHERTYPE_LOOPBACK 0x9000 /* used to test interfaces */
70/* XXX - add more useful types here */
71
72/*
73 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
74 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
75 * by an ETHER type (as given above) and then the (variable-length) header.
76 */
77#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
78#define ETHERTYPE_NTRAILER 16
79
80#define ETHERMTU (ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
81#define ETHERMIN (ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
82
|
83#ifndef _KERNEL
| 83#ifdef _KERNEL
84
85extern void (*ng_ether_input_p)(struct ifnet *ifp,
86 struct mbuf **mp, struct ether_header *eh);
87extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp,
88 struct mbuf *m, struct ether_header *eh);
89extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
90extern void (*ng_ether_attach_p)(struct ifnet *ifp);
91extern void (*ng_ether_detach_p)(struct ifnet *ifp);
92
93#else /* _KERNEL */
94
|
84#include <sys/cdefs.h>
85
86/*
87 * Ethernet address conversion/parsing routines.
88 */
89__BEGIN_DECLS
90struct ether_addr *ether_aton __P((char *));
91int ether_hostton __P((char *, struct ether_addr *));
92int ether_line __P((char *, struct ether_addr *, char *));
93char *ether_ntoa __P((struct ether_addr *));
94int ether_ntohost __P((char *, struct ether_addr *));
95__END_DECLS
| 95#include <sys/cdefs.h>
96
97/*
98 * Ethernet address conversion/parsing routines.
99 */
100__BEGIN_DECLS
101struct ether_addr *ether_aton __P((char *));
102int ether_hostton __P((char *, struct ether_addr *));
103int ether_line __P((char *, struct ether_addr *, char *));
104char *ether_ntoa __P((struct ether_addr *));
105int ether_ntohost __P((char *, struct ether_addr *));
106__END_DECLS
|
96#endif
| |
97
| 107
|
| 108#endif /* !_KERNEL */
109
|
98#endif /* !_NET_ETHERNET_H_ */
| 110#endif /* !_NET_ETHERNET_H_ */
|