xref: /illumos-gate/usr/src/uts/common/sys/ethernet.h (revision 6f443ebc1fb4fec01d6e8fa8ca4648182ed215bb)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
23  * Copyright 2021 Oxide Computer Company
24  *
25  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
26  * Use is subject to license terms.
27  */
28 
29 /*
30  * ethernet.h header for common Ethernet declarations.
31  */
32 
33 #ifndef	_SYS_ETHERNET_H
34 #define	_SYS_ETHERNET_H
35 
36 #ifdef	__cplusplus
37 extern "C" {
38 #endif
39 
40 #define	ETHERADDRL	(6)		/* ethernet address length in octets */
41 #define	ETHERFCSL	(4)		/* ethernet FCS length in octets */
42 #define	ETHERADDRSTRL	(18)		/* char size of ETHERADDRL with null */
43 
44 /*
45  * Ethernet address - 6 octets
46  */
47 typedef uchar_t ether_addr_t[ETHERADDRL];
48 
49 /*
50  * Ethernet address - 6 octets
51  */
52 struct	ether_addr {
53 	ether_addr_t	ether_addr_octet;
54 };
55 
56 /*
57  * Structure of a 10Mb/s Ethernet header.
58  */
59 struct	ether_header {
60 	struct	ether_addr	ether_dhost;
61 	struct	ether_addr	ether_shost;
62 	ushort_t		ether_type;
63 };
64 
65 #define	ETHER_CFI	0
66 
67 struct	ether_vlan_header {
68 	struct	ether_addr	ether_dhost;
69 	struct	ether_addr	ether_shost;
70 	ushort_t		ether_tpid;
71 	ushort_t		ether_tci;
72 	ushort_t		ether_type;
73 };
74 
75 /*
76  * The VLAN tag.  Available for applications that cannot make use of struct
77  * ether_vlan_header because they assume Ethernet encapsulation.
78  */
79 struct ether_vlan_extinfo {
80 	ushort_t		ether_tci;
81 	ushort_t		ether_type;
82 };
83 
84 #define	ETHERTYPE_PUP		(0x0200)	/* PUP protocol */
85 #define	ETHERTYPE_802_MIN	(0x0600)	/* Min valid ethernet type */
86 						/* under IEEE 802.3 rules */
87 #define	ETHERTYPE_IP		(0x0800)	/* IP protocol */
88 #define	ETHERTYPE_ARP		(0x0806)	/* Addr. resolution protocol */
89 #define	ETHERTYPE_REVARP	(0x8035)	/* Reverse ARP */
90 #define	ETHERTYPE_AT		(0x809b)	/* AppleTalk protocol */
91 #define	ETHERTYPE_AARP		(0x80f3)	/* AppleTalk ARP */
92 #define	ETHERTYPE_VLAN		(0x8100)	/* 802.1Q VLAN */
93 #define	ETHERTYPE_IPV6		(0x86dd)	/* IPv6 */
94 #define	ETHERTYPE_SLOW		(0x8809)	/* Slow Protocol */
95 #define	ETHERTYPE_PPPOED	(0x8863)	/* PPPoE Discovery Stage */
96 #define	ETHERTYPE_PPPOES	(0x8864)	/* PPPoE Session Stage */
97 #define	ETHERTYPE_EAPOL		(0x888e)	/* EAPOL protocol */
98 #define	ETHERTYPE_RSN_PREAUTH	(0x88c7)	/* RSN PRE-Authentication */
99 #define	ETHERTYPE_TRILL		(0x88c8)	/* TBD. TRILL frame */
100 #define	ETHERTYPE_FCOE		(0x8906)	/* FCoE */
101 #define	ETHERTYPE_MAX		(0xffff)	/* Max valid ethernet type */
102 
103 /*
104  * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
105  * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
106  * by an ETHER type (as given above) and then the (variable-length) header.
107  */
108 #define	ETHERTYPE_TRAIL		(0x1000)	/* Trailer packet */
109 #define	ETHERTYPE_NTRAILER	(16)
110 
111 #define	ETHERMTU		(1500)	/* max frame w/o header or fcs */
112 #define	ETHERMIN		(60)	/* min frame w/header w/o fcs */
113 #define	ETHERMAX		(1514)	/* max frame w/header w/o fcs */
114 
115 /*
116  * Compare two Ethernet addresses - assumes that the two given
117  * pointers can be referenced as shorts.  On architectures
118  * where this is not the case, use bcmp instead.  Note that like
119  * bcmp, we return zero if they are the SAME.
120  */
121 
122 #if defined(__sparc) || defined(__i386) || defined(__amd64)
123 #define	ether_cmp(a, b) (((short *)b)[2] != ((short *)a)[2] || \
124 	((short *)b)[1] != ((short *)a)[1] || \
125 	((short *)b)[0] != ((short *)a)[0])
126 #else
127 #define	ether_cmp(a, b) (bcmp((caddr_t)a, (caddr_t)b, 6))
128 #endif
129 
130 /*
131  * Copy Ethernet addresses from a to b - assumes that the two given
132  * pointers can be referenced as shorts.  On architectures
133  * where this is not the case, use bcopy instead.
134  */
135 
136 #if defined(__sparc) || defined(__i386) || defined(__amd64)
137 #define	ether_copy(a, b) { ((short *)b)[0] = ((short *)a)[0]; \
138 	((short *)b)[1] = ((short *)a)[1]; ((short *)b)[2] = ((short *)a)[2]; }
139 #else
140 #define	ether_copy(a, b) (bcopy((caddr_t)a, (caddr_t)b, 6))
141 #endif
142 
143 #ifdef	_KERNEL
144 #define	ETHER_IS_MULTICAST(addr)	(((addr)[0] & 0x01) != 0)
145 
146 extern int localetheraddr(struct ether_addr *, struct ether_addr *);
147 extern char *ether_sprintf(struct ether_addr *);
148 extern int ether_aton(char *, uchar_t *);
149 #else	/* _KERNEL */
150 extern char *ether_ntoa(const struct ether_addr *);
151 extern char *ether_ntoa_r(const struct ether_addr *, char *);
152 extern struct ether_addr *ether_aton(const char *);
153 extern struct ether_addr *ether_aton_r(const char *, struct ether_addr *);
154 extern int ether_ntohost(char *, const struct ether_addr *);
155 extern int ether_hostton(const char *, struct ether_addr *);
156 extern int ether_line(const char *, struct ether_addr *, char *);
157 #endif	/* _KERNEL */
158 
159 #ifdef	__cplusplus
160 }
161 #endif
162 
163 #endif	/* _SYS_ETHERNET_H */
164