ethernet.h revision 305731 
1/*
2 * Fundamental constants relating to ethernet.
3 *
4 * $FreeBSD: stable/11/sys/net/ethernet.h 305731 2016-09-12 08:14:11Z sephe $
5 *
6 */
7
8#ifndef _NET_ETHERNET_H_
9#define _NET_ETHERNET_H_
10
11/*
12 * Some basic Ethernet constants.
13 */
14#define	ETHER_ADDR_LEN		6	/* length of an Ethernet address */
15#define	ETHER_TYPE_LEN		2	/* length of the Ethernet type field */
16#define	ETHER_CRC_LEN		4	/* length of the Ethernet CRC */
17#define	ETHER_HDR_LEN		(ETHER_ADDR_LEN*2+ETHER_TYPE_LEN)
18#define	ETHER_MIN_LEN		64	/* minimum frame len, including CRC */
19#define	ETHER_MAX_LEN		1518	/* maximum frame len, including CRC */
20#define	ETHER_MAX_LEN_JUMBO	9018	/* max jumbo frame len, including CRC */
21
22#define	ETHER_VLAN_ENCAP_LEN	4	/* len of 802.1Q VLAN encapsulation */
23/*
24 * Mbuf adjust factor to force 32-bit alignment of IP header.
25 * Drivers should do m_adj(m, ETHER_ALIGN) when setting up a
26 * receive so the upper layers get the IP header properly aligned
27 * past the 14-byte Ethernet header.
28 */
29#define	ETHER_ALIGN		2	/* driver adjust for IP hdr alignment */
30
31/*
32 * Compute the maximum frame size based on ethertype (i.e. possible
33 * encapsulation) and whether or not an FCS is present.
34 */
35#define	ETHER_MAX_FRAME(ifp, etype, hasfcs)				\
36	((ifp)->if_mtu + ETHER_HDR_LEN +				\
37	 ((hasfcs) ? ETHER_CRC_LEN : 0) +				\
38	 (((etype) == ETHERTYPE_VLAN) ? ETHER_VLAN_ENCAP_LEN : 0))
39
40/*
41 * Ethernet-specific mbuf flags.
42 */
43#define	M_HASFCS	M_PROTO5	/* FCS included at end of frame */
44
45/*
46 * Ethernet CRC32 polynomials (big- and little-endian verions).
47 */
48#define	ETHER_CRC_POLY_LE	0xedb88320
49#define	ETHER_CRC_POLY_BE	0x04c11db6
50
51/*
52 * A macro to validate a length with
53 */
54#define	ETHER_IS_VALID_LEN(foo)	\
55	((foo) >= ETHER_MIN_LEN && (foo) <= ETHER_MAX_LEN)
56
57/*
58 * Structure of a 10Mb/s Ethernet header.
59 */
60struct ether_header {
61	u_char	ether_dhost[ETHER_ADDR_LEN];
62	u_char	ether_shost[ETHER_ADDR_LEN];
63	u_short	ether_type;
64} __packed;
65
66/*
67 * Structure of a 48-bit Ethernet address.
68 */
69struct ether_addr {
70	u_char octet[ETHER_ADDR_LEN];
71} __packed;
72
73#define	ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
74
75/*
76 * 802.1q Virtual LAN header.
77 */
78struct ether_vlan_header {
79	uint8_t evl_dhost[ETHER_ADDR_LEN];
80	uint8_t evl_shost[ETHER_ADDR_LEN];
81	uint16_t evl_encap_proto;
82	uint16_t evl_tag;
83	uint16_t evl_proto;
84} __packed;
85
86#define	EVL_VLID_MASK		0x0FFF
87#define	EVL_PRI_MASK		0xE000
88#define	EVL_VLANOFTAG(tag)	((tag) & EVL_VLID_MASK)
89#define	EVL_PRIOFTAG(tag)	(((tag) >> 13) & 7)
90#define	EVL_CFIOFTAG(tag)	(((tag) >> 12) & 1)
91#define	EVL_MAKETAG(vlid, pri, cfi)					\
92	((((((pri) & 7) << 13) | ((cfi) & 1)) << 12) | ((vlid) & EVL_VLID_MASK))
93
94/*
95 *  NOTE: 0x0000-0x05DC (0..1500) are generally IEEE 802.3 length fields.
96 *  However, there are some conflicts.
97 */
98
99#define	ETHERTYPE_8023		0x0004	/* IEEE 802.3 packet */
100		   /* 0x0101 .. 0x1FF	   Experimental */
101#define	ETHERTYPE_PUP		0x0200	/* Xerox PUP protocol - see 0A00 */
102#define	ETHERTYPE_PUPAT		0x0200	/* PUP Address Translation - see 0A01 */
103#define	ETHERTYPE_SPRITE	0x0500	/* ??? */
104			     /* 0x0400	   Nixdorf */
105#define	ETHERTYPE_NS		0x0600	/* XNS */
106#define	ETHERTYPE_NSAT		0x0601	/* XNS Address Translation (3Mb only) */
107#define	ETHERTYPE_DLOG1 	0x0660	/* DLOG (?) */
108#define	ETHERTYPE_DLOG2 	0x0661	/* DLOG (?) */
109#define	ETHERTYPE_IP		0x0800	/* IP protocol */
110#define	ETHERTYPE_X75		0x0801	/* X.75 Internet */
111#define	ETHERTYPE_NBS		0x0802	/* NBS Internet */
112#define	ETHERTYPE_ECMA		0x0803	/* ECMA Internet */
113#define	ETHERTYPE_CHAOS 	0x0804	/* CHAOSnet */
114#define	ETHERTYPE_X25		0x0805	/* X.25 Level 3 */
115#define	ETHERTYPE_ARP		0x0806	/* Address resolution protocol */
116#define	ETHERTYPE_NSCOMPAT	0x0807	/* XNS Compatibility */
117#define	ETHERTYPE_FRARP 	0x0808	/* Frame Relay ARP (RFC1701) */
118			     /* 0x081C	   Symbolics Private */
119		    /* 0x0888 - 0x088A	   Xyplex */
120#define	ETHERTYPE_UBDEBUG	0x0900	/* Ungermann-Bass network debugger */
121#define	ETHERTYPE_IEEEPUP	0x0A00	/* Xerox IEEE802.3 PUP */
122#define	ETHERTYPE_IEEEPUPAT	0x0A01	/* Xerox IEEE802.3 PUP Address Translation */
123#define	ETHERTYPE_VINES 	0x0BAD	/* Banyan VINES */
124#define	ETHERTYPE_VINESLOOP	0x0BAE	/* Banyan VINES Loopback */
125#define	ETHERTYPE_VINESECHO	0x0BAF	/* Banyan VINES Echo */
126
127/*		       0x1000 - 0x100F	   Berkeley Trailer */
128/*
129 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
130 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
131 * by an ETHER type (as given above) and then the (variable-length) header.
132 */
133#define	ETHERTYPE_TRAIL		0x1000	/* Trailer packet */
134#define	ETHERTYPE_NTRAILER	16
135
136#define	ETHERTYPE_DCA		0x1234	/* DCA - Multicast */
137#define	ETHERTYPE_VALID 	0x1600	/* VALID system protocol */
138#define	ETHERTYPE_DOGFIGHT	0x1989	/* Artificial Horizons ("Aviator" dogfight simulator [on Sun]) */
139#define	ETHERTYPE_RCL		0x1995	/* Datapoint Corporation (RCL lan protocol) */
140
141					/* The following 3C0x types
142					   are unregistered: */
143#define	ETHERTYPE_NBPVCD	0x3C00	/* 3Com NBP virtual circuit datagram (like XNS SPP) not registered */
144#define	ETHERTYPE_NBPSCD	0x3C01	/* 3Com NBP System control datagram not registered */
145#define	ETHERTYPE_NBPCREQ	0x3C02	/* 3Com NBP Connect request (virtual cct) not registered */
146#define	ETHERTYPE_NBPCRSP	0x3C03	/* 3Com NBP Connect response not registered */
147#define	ETHERTYPE_NBPCC		0x3C04	/* 3Com NBP Connect complete not registered */
148#define	ETHERTYPE_NBPCLREQ	0x3C05	/* 3Com NBP Close request (virtual cct) not registered */
149#define	ETHERTYPE_NBPCLRSP	0x3C06	/* 3Com NBP Close response not registered */
150#define	ETHERTYPE_NBPDG		0x3C07	/* 3Com NBP Datagram (like XNS IDP) not registered */
151#define	ETHERTYPE_NBPDGB	0x3C08	/* 3Com NBP Datagram broadcast not registered */
152#define	ETHERTYPE_NBPCLAIM	0x3C09	/* 3Com NBP Claim NetBIOS name not registered */
153#define	ETHERTYPE_NBPDLTE	0x3C0A	/* 3Com NBP Delete NetBIOS name not registered */
154#define	ETHERTYPE_NBPRAS	0x3C0B	/* 3Com NBP Remote adaptor status request not registered */
155#define	ETHERTYPE_NBPRAR	0x3C0C	/* 3Com NBP Remote adaptor response not registered */
156#define	ETHERTYPE_NBPRST	0x3C0D	/* 3Com NBP Reset not registered */
157
158#define	ETHERTYPE_PCS		0x4242	/* PCS Basic Block Protocol */
159#define	ETHERTYPE_IMLBLDIAG	0x424C	/* Information Modes Little Big LAN diagnostic */
160#define	ETHERTYPE_DIDDLE	0x4321	/* THD - Diddle */
161#define	ETHERTYPE_IMLBL		0x4C42	/* Information Modes Little Big LAN */
162#define	ETHERTYPE_SIMNET	0x5208	/* BBN Simnet Private */
163#define	ETHERTYPE_DECEXPER	0x6000	/* DEC Unassigned, experimental */
164#define	ETHERTYPE_MOPDL		0x6001	/* DEC MOP dump/load */
165#define	ETHERTYPE_MOPRC		0x6002	/* DEC MOP remote console */
166#define	ETHERTYPE_DECnet	0x6003	/* DEC DECNET Phase IV route */
167#define	ETHERTYPE_DN		ETHERTYPE_DECnet	/* libpcap, tcpdump */
168#define	ETHERTYPE_LAT		0x6004	/* DEC LAT */
169#define	ETHERTYPE_DECDIAG	0x6005	/* DEC diagnostic protocol (at interface initialization?) */
170#define	ETHERTYPE_DECCUST	0x6006	/* DEC customer protocol */
171#define	ETHERTYPE_SCA		0x6007	/* DEC LAVC, SCA */
172#define	ETHERTYPE_AMBER		0x6008	/* DEC AMBER */
173#define	ETHERTYPE_DECMUMPS	0x6009	/* DEC MUMPS */
174		    /* 0x6010 - 0x6014	   3Com Corporation */
175#define	ETHERTYPE_TRANSETHER	0x6558	/* Trans Ether Bridging (RFC1701)*/
176#define	ETHERTYPE_RAWFR		0x6559	/* Raw Frame Relay (RFC1701) */
177#define	ETHERTYPE_UBDL		0x7000	/* Ungermann-Bass download */
178#define	ETHERTYPE_UBNIU		0x7001	/* Ungermann-Bass NIUs */
179#define	ETHERTYPE_UBDIAGLOOP	0x7002	/* Ungermann-Bass diagnostic/loopback */
180#define	ETHERTYPE_UBNMC		0x7003	/* Ungermann-Bass ??? (NMC to/from UB Bridge) */
181#define	ETHERTYPE_UBBST		0x7005	/* Ungermann-Bass Bridge Spanning Tree */
182#define	ETHERTYPE_OS9		0x7007	/* OS/9 Microware */
183#define	ETHERTYPE_OS9NET	0x7009	/* OS/9 Net? */
184		    /* 0x7020 - 0x7029	   LRT (England) (now Sintrom) */
185#define	ETHERTYPE_RACAL		0x7030	/* Racal-Interlan */
186#define	ETHERTYPE_PRIMENTS	0x7031	/* Prime NTS (Network Terminal Service) */
187#define	ETHERTYPE_CABLETRON	0x7034	/* Cabletron */
188#define	ETHERTYPE_CRONUSVLN	0x8003	/* Cronus VLN */
189#define	ETHERTYPE_CRONUS	0x8004	/* Cronus Direct */
190#define	ETHERTYPE_HP		0x8005	/* HP Probe */
191#define	ETHERTYPE_NESTAR	0x8006	/* Nestar */
192#define	ETHERTYPE_ATTSTANFORD	0x8008	/* AT&T/Stanford (local use) */
193#define	ETHERTYPE_EXCELAN	0x8010	/* Excelan */
194#define	ETHERTYPE_SG_DIAG	0x8013	/* SGI diagnostic type */
195#define	ETHERTYPE_SG_NETGAMES	0x8014	/* SGI network games */
196#define	ETHERTYPE_SG_RESV	0x8015	/* SGI reserved type */
197#define	ETHERTYPE_SG_BOUNCE	0x8016	/* SGI bounce server */
198#define	ETHERTYPE_APOLLODOMAIN	0x8019	/* Apollo DOMAIN */
199#define	ETHERTYPE_TYMSHARE	0x802E	/* Tymeshare */
200#define	ETHERTYPE_TIGAN		0x802F	/* Tigan, Inc. */
201#define	ETHERTYPE_REVARP	0x8035	/* Reverse addr resolution protocol */
202#define	ETHERTYPE_AEONIC	0x8036	/* Aeonic Systems */
203#define	ETHERTYPE_IPXNEW	0x8037	/* IPX (Novell Netware?) */
204#define	ETHERTYPE_LANBRIDGE	0x8038	/* DEC LANBridge */
205#define	ETHERTYPE_DSMD	0x8039	/* DEC DSM/DDP */
206#define	ETHERTYPE_ARGONAUT	0x803A	/* DEC Argonaut Console */
207#define	ETHERTYPE_VAXELN	0x803B	/* DEC VAXELN */
208#define	ETHERTYPE_DECDNS	0x803C	/* DEC DNS Naming Service */
209#define	ETHERTYPE_ENCRYPT	0x803D	/* DEC Ethernet Encryption */
210#define	ETHERTYPE_DECDTS	0x803E	/* DEC Distributed Time Service */
211#define	ETHERTYPE_DECLTM	0x803F	/* DEC LAN Traffic Monitor */
212#define	ETHERTYPE_DECNETBIOS	0x8040	/* DEC PATHWORKS DECnet NETBIOS Emulation */
213#define	ETHERTYPE_DECLAST	0x8041	/* DEC Local Area System Transport */
214			     /* 0x8042	   DEC Unassigned */
215#define	ETHERTYPE_PLANNING	0x8044	/* Planning Research Corp. */
216		    /* 0x8046 - 0x8047	   AT&T */
217#define	ETHERTYPE_DECAM		0x8048	/* DEC Availability Manager for Distributed Systems DECamds (but someone at DEC says not) */
218#define	ETHERTYPE_EXPERDATA	0x8049	/* ExperData */
219#define	ETHERTYPE_VEXP		0x805B	/* Stanford V Kernel exp. */
220#define	ETHERTYPE_VPROD		0x805C	/* Stanford V Kernel prod. */
221#define	ETHERTYPE_ES		0x805D	/* Evans & Sutherland */
222#define	ETHERTYPE_LITTLE	0x8060	/* Little Machines */
223#define	ETHERTYPE_COUNTERPOINT	0x8062	/* Counterpoint Computers */
224		    /* 0x8065 - 0x8066	   Univ. of Mass @ Amherst */
225#define	ETHERTYPE_VEECO		0x8067	/* Veeco Integrated Auto. */
226#define	ETHERTYPE_GENDYN	0x8068	/* General Dynamics */
227#define	ETHERTYPE_ATT		0x8069	/* AT&T */
228#define	ETHERTYPE_AUTOPHON	0x806A	/* Autophon */
229#define	ETHERTYPE_COMDESIGN	0x806C	/* ComDesign */
230#define	ETHERTYPE_COMPUGRAPHIC	0x806D	/* Compugraphic Corporation */
231		    /* 0x806E - 0x8077	   Landmark Graphics Corp. */
232#define	ETHERTYPE_MATRA		0x807A	/* Matra */
233#define	ETHERTYPE_DDE		0x807B	/* Dansk Data Elektronik */
234#define	ETHERTYPE_MERIT		0x807C	/* Merit Internodal (or Univ of Michigan?) */
235		    /* 0x807D - 0x807F	   Vitalink Communications */
236#define	ETHERTYPE_VLTLMAN	0x8080	/* Vitalink TransLAN III Management */
237		    /* 0x8081 - 0x8083	   Counterpoint Computers */
238		    /* 0x8088 - 0x808A	   Xyplex */
239#define	ETHERTYPE_ATALK		0x809B	/* AppleTalk */
240#define	ETHERTYPE_AT		ETHERTYPE_ATALK		/* old NetBSD */
241#define	ETHERTYPE_APPLETALK	ETHERTYPE_ATALK		/* HP-UX */
242		    /* 0x809C - 0x809E	   Datability */
243#define	ETHERTYPE_SPIDER	0x809F	/* Spider Systems Ltd. */
244			     /* 0x80A3	   Nixdorf */
245		    /* 0x80A4 - 0x80B3	   Siemens Gammasonics Inc. */
246		    /* 0x80C0 - 0x80C3	   DCA (Digital Comm. Assoc.) Data Exchange Cluster */
247		    /* 0x80C4 - 0x80C5	   Banyan Systems */
248#define	ETHERTYPE_PACER		0x80C6	/* Pacer Software */
249#define	ETHERTYPE_APPLITEK	0x80C7	/* Applitek Corporation */
250		    /* 0x80C8 - 0x80CC	   Intergraph Corporation */
251		    /* 0x80CD - 0x80CE	   Harris Corporation */
252		    /* 0x80CF - 0x80D2	   Taylor Instrument */
253		    /* 0x80D3 - 0x80D4	   Rosemount Corporation */
254#define	ETHERTYPE_SNA		0x80D5	/* IBM SNA Services over Ethernet */
255#define	ETHERTYPE_VARIAN	0x80DD	/* Varian Associates */
256		    /* 0x80DE - 0x80DF	   TRFS (Integrated Solutions Transparent Remote File System) */
257		    /* 0x80E0 - 0x80E3	   Allen-Bradley */
258		    /* 0x80E4 - 0x80F0	   Datability */
259#define	ETHERTYPE_RETIX		0x80F2	/* Retix */
260#define	ETHERTYPE_AARP		0x80F3	/* AppleTalk AARP */
261		    /* 0x80F4 - 0x80F5	   Kinetics */
262#define	ETHERTYPE_APOLLO	0x80F7	/* Apollo Computer */
263#define ETHERTYPE_VLAN		0x8100	/* IEEE 802.1Q VLAN tagging (XXX conflicts) */
264		    /* 0x80FF - 0x8101	   Wellfleet Communications (XXX conflicts) */
265#define	ETHERTYPE_BOFL		0x8102	/* Wellfleet; BOFL (Breath OF Life) pkts [every 5-10 secs.] */
266#define	ETHERTYPE_WELLFLEET	0x8103	/* Wellfleet Communications */
267		    /* 0x8107 - 0x8109	   Symbolics Private */
268#define	ETHERTYPE_TALARIS	0x812B	/* Talaris */
269#define	ETHERTYPE_WATERLOO	0x8130	/* Waterloo Microsystems Inc. (XXX which?) */
270#define	ETHERTYPE_HAYES		0x8130	/* Hayes Microcomputers (XXX which?) */
271#define	ETHERTYPE_VGLAB		0x8131	/* VG Laboratory Systems */
272		    /* 0x8132 - 0x8137	   Bridge Communications */
273#define	ETHERTYPE_IPX		0x8137	/* Novell (old) NetWare IPX (ECONFIG E option) */
274#define	ETHERTYPE_NOVELL	0x8138	/* Novell, Inc. */
275		    /* 0x8139 - 0x813D	   KTI */
276#define	ETHERTYPE_MUMPS		0x813F	/* M/MUMPS data sharing */
277#define	ETHERTYPE_AMOEBA	0x8145	/* Vrije Universiteit (NL) Amoeba 4 RPC (obsolete) */
278#define	ETHERTYPE_FLIP		0x8146	/* Vrije Universiteit (NL) FLIP (Fast Local Internet Protocol) */
279#define	ETHERTYPE_VURESERVED	0x8147	/* Vrije Universiteit (NL) [reserved] */
280#define	ETHERTYPE_LOGICRAFT	0x8148	/* Logicraft */
281#define	ETHERTYPE_NCD		0x8149	/* Network Computing Devices */
282#define	ETHERTYPE_ALPHA		0x814A	/* Alpha Micro */
283#define	ETHERTYPE_SNMP		0x814C	/* SNMP over Ethernet (see RFC1089) */
284		    /* 0x814D - 0x814E	   BIIN */
285#define	ETHERTYPE_TEC	0x814F	/* Technically Elite Concepts */
286#define	ETHERTYPE_RATIONAL	0x8150	/* Rational Corp */
287		    /* 0x8151 - 0x8153	   Qualcomm */
288		    /* 0x815C - 0x815E	   Computer Protocol Pty Ltd */
289		    /* 0x8164 - 0x8166	   Charles River Data Systems */
290#define	ETHERTYPE_XTP		0x817D	/* Protocol Engines XTP */
291#define	ETHERTYPE_SGITW		0x817E	/* SGI/Time Warner prop. */
292#define	ETHERTYPE_HIPPI_FP	0x8180	/* HIPPI-FP encapsulation */
293#define	ETHERTYPE_STP		0x8181	/* Scheduled Transfer STP, HIPPI-ST */
294		    /* 0x8182 - 0x8183	   Reserved for HIPPI-6400 */
295		    /* 0x8184 - 0x818C	   SGI prop. */
296#define	ETHERTYPE_MOTOROLA	0x818D	/* Motorola */
297#define	ETHERTYPE_NETBEUI	0x8191	/* PowerLAN NetBIOS/NetBEUI (PC) */
298		    /* 0x819A - 0x81A3	   RAD Network Devices */
299		    /* 0x81B7 - 0x81B9	   Xyplex */
300		    /* 0x81CC - 0x81D5	   Apricot Computers */
301		    /* 0x81D6 - 0x81DD	   Artisoft Lantastic */
302		    /* 0x81E6 - 0x81EF	   Polygon */
303		    /* 0x81F0 - 0x81F2	   Comsat Labs */
304		    /* 0x81F3 - 0x81F5	   SAIC */
305		    /* 0x81F6 - 0x81F8	   VG Analytical */
306		    /* 0x8203 - 0x8205	   QNX Software Systems Ltd. */
307		    /* 0x8221 - 0x8222	   Ascom Banking Systems */
308		    /* 0x823E - 0x8240	   Advanced Encryption Systems */
309		    /* 0x8263 - 0x826A	   Charles River Data Systems */
310		    /* 0x827F - 0x8282	   Athena Programming */
311		    /* 0x829A - 0x829B	   Inst Ind Info Tech */
312		    /* 0x829C - 0x82AB	   Taurus Controls */
313		    /* 0x82AC - 0x8693	   Walker Richer & Quinn */
314#define	ETHERTYPE_ACCTON	0x8390	/* Accton Technologies (unregistered) */
315#define	ETHERTYPE_TALARISMC	0x852B	/* Talaris multicast */
316#define	ETHERTYPE_KALPANA	0x8582	/* Kalpana */
317		    /* 0x8694 - 0x869D	   Idea Courier */
318		    /* 0x869E - 0x86A1	   Computer Network Tech */
319		    /* 0x86A3 - 0x86AC	   Gateway Communications */
320#define	ETHERTYPE_SECTRA	0x86DB	/* SECTRA */
321#define	ETHERTYPE_IPV6		0x86DD	/* IP protocol version 6 */
322#define	ETHERTYPE_DELTACON	0x86DE	/* Delta Controls */
323#define	ETHERTYPE_ATOMIC	0x86DF	/* ATOMIC */
324		    /* 0x86E0 - 0x86EF	   Landis & Gyr Powers */
325		    /* 0x8700 - 0x8710	   Motorola */
326#define	ETHERTYPE_RDP		0x8739	/* Control Technology Inc. RDP Without IP */
327#define	ETHERTYPE_MICP		0x873A	/* Control Technology Inc. Mcast Industrial Ctrl Proto. */
328		    /* 0x873B - 0x873C	   Control Technology Inc. Proprietary */
329#define	ETHERTYPE_TCPCOMP	0x876B	/* TCP/IP Compression (RFC1701) */
330#define	ETHERTYPE_IPAS		0x876C	/* IP Autonomous Systems (RFC1701) */
331#define	ETHERTYPE_SECUREDATA	0x876D	/* Secure Data (RFC1701) */
332#define	ETHERTYPE_FLOWCONTROL	0x8808	/* 802.3x flow control packet */
333#define	ETHERTYPE_SLOW		0x8809	/* 802.3ad link aggregation (LACP) */
334#define	ETHERTYPE_PPP		0x880B	/* PPP (obsolete by PPPoE) */
335#define	ETHERTYPE_HITACHI	0x8820	/* Hitachi Cable (Optoelectronic Systems Laboratory) */
336#define ETHERTYPE_TEST		0x8822  /* Network Conformance Testing */
337#define	ETHERTYPE_MPLS		0x8847	/* MPLS Unicast */
338#define	ETHERTYPE_MPLS_MCAST	0x8848	/* MPLS Multicast */
339#define	ETHERTYPE_AXIS		0x8856	/* Axis Communications AB proprietary bootstrap/config */
340#define	ETHERTYPE_PPPOEDISC	0x8863	/* PPP Over Ethernet Discovery Stage */
341#define	ETHERTYPE_PPPOE		0x8864	/* PPP Over Ethernet Session Stage */
342#define	ETHERTYPE_LANPROBE	0x8888	/* HP LanProbe test? */
343#define	ETHERTYPE_PAE		0x888e	/* EAPOL PAE/802.1x */
344#define	ETHERTYPE_LOOPBACK	0x9000	/* Loopback: used to test interfaces */
345#define	ETHERTYPE_LBACK		ETHERTYPE_LOOPBACK	/* DEC MOP loopback */
346#define	ETHERTYPE_XNSSM		0x9001	/* 3Com (Formerly Bridge Communications), XNS Systems Management */
347#define	ETHERTYPE_TCPSM		0x9002	/* 3Com (Formerly Bridge Communications), TCP/IP Systems Management */
348#define	ETHERTYPE_BCLOOP	0x9003	/* 3Com (Formerly Bridge Communications), loopback detection */
349#define	ETHERTYPE_DEBNI		0xAAAA	/* DECNET? Used by VAX 6220 DEBNI */
350#define	ETHERTYPE_SONIX		0xFAF5	/* Sonix Arpeggio */
351#define	ETHERTYPE_VITAL		0xFF00	/* BBN VITAL-LanBridge cache wakeups */
352		    /* 0xFF00 - 0xFFOF	   ISC Bunker Ramo */
353
354#define	ETHERTYPE_MAX		0xFFFF	/* Maximum valid ethernet type, reserved */
355
356/*
357 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
358 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
359 * by an ETHER type (as given above) and then the (variable-length) header.
360 */
361#define	ETHERTYPE_TRAIL		0x1000		/* Trailer packet */
362#define	ETHERTYPE_NTRAILER	16
363
364#define	ETHERMTU	(ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
365#define	ETHERMIN	(ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
366#define	ETHERMTU_JUMBO	(ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN)
367/*
368 * The ETHER_BPF_MTAP macro should be used by drivers which support hardware
369 * offload for VLAN tag processing.  It will check the mbuf to see if it has
370 * M_VLANTAG set, and if it does, will pass the packet along to
371 * ether_vlan_mtap.  This function will re-insert VLAN tags for the duration
372 * of the tap, so they show up properly for network analyzers.
373 */
374#define ETHER_BPF_MTAP(_ifp, _m) do {					\
375	if (bpf_peers_present((_ifp)->if_bpf)) {			\
376		M_ASSERTVALID(_m);					\
377		if (((_m)->m_flags & M_VLANTAG) != 0)			\
378			ether_vlan_mtap((_ifp)->if_bpf, (_m), NULL, 0);	\
379		else							\
380			bpf_mtap((_ifp)->if_bpf, (_m));			\
381	}								\
382} while (0)
383
384#ifdef _KERNEL
385
386struct ifnet;
387struct mbuf;
388struct route;
389struct sockaddr;
390struct bpf_if;
391
392extern	uint32_t ether_crc32_le(const uint8_t *, size_t);
393extern	uint32_t ether_crc32_be(const uint8_t *, size_t);
394extern	void ether_demux(struct ifnet *, struct mbuf *);
395extern	void ether_ifattach(struct ifnet *, const u_int8_t *);
396extern	void ether_ifdetach(struct ifnet *);
397extern	int  ether_ioctl(struct ifnet *, u_long, caddr_t);
398extern	int  ether_output(struct ifnet *, struct mbuf *,
399	    const struct sockaddr *, struct route *);
400extern	int  ether_output_frame(struct ifnet *, struct mbuf *);
401extern	char *ether_sprintf(const u_int8_t *);
402void	ether_vlan_mtap(struct bpf_if *, struct mbuf *,
403	    void *, u_int);
404struct mbuf  *ether_vlanencap(struct mbuf *, uint16_t);
405
406#else /* _KERNEL */
407
408#include <sys/cdefs.h>
409
410/*
411 * Ethernet address conversion/parsing routines.
412 */
413__BEGIN_DECLS
414struct	ether_addr *ether_aton(const char *);
415struct	ether_addr *ether_aton_r(const char *, struct ether_addr *);
416int	ether_hostton(const char *, struct ether_addr *);
417int	ether_line(const char *, struct ether_addr *, char *);
418char 	*ether_ntoa(const struct ether_addr *);
419char 	*ether_ntoa_r(const struct ether_addr *, char *);
420int	ether_ntohost(char *, const struct ether_addr *);
421__END_DECLS
422
423#endif /* !_KERNEL */
424
425#endif /* !_NET_ETHERNET_H_ */
426