xref: /freebsd/sys/net/ethernet.h (revision c98323078dede7579020518ec84cdcb478e5c142)
1 /*
2  * Fundamental constants relating to ethernet.
3  *
4  * $FreeBSD$
5  *
6  */
7 
8 #ifndef _NET_ETHERNET_H_
9 #define _NET_ETHERNET_H_
10 
11 /*
12  * Somce 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  */
60 struct	ether_header {
61 	u_char	ether_dhost[ETHER_ADDR_LEN];
62 	u_char	ether_shost[ETHER_ADDR_LEN];
63 	u_short	ether_type;
64 };
65 
66 /*
67  * Structure of a 48-bit Ethernet address.
68  */
69 struct	ether_addr {
70 	u_char octet[ETHER_ADDR_LEN];
71 };
72 
73 #define	ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
74 
75 /*
76  *  NOTE: 0x0000-0x05DC (0..1500) are generally IEEE 802.3 length fields.
77  *  However, there are some conflicts.
78  */
79 
80 #define	ETHERTYPE_8023		0x0004	/* IEEE 802.3 packet */
81 		   /* 0x0101 .. 0x1FF	   Experimental */
82 #define	ETHERTYPE_PUP		0x0200	/* Xerox PUP protocol - see 0A00 */
83 #define	ETHERTYPE_PUPAT		0x0200	/* PUP Address Translation - see 0A01 */
84 #define	ETHERTYPE_SPRITE	0x0500	/* ??? */
85 			     /* 0x0400	   Nixdorf */
86 #define	ETHERTYPE_NS		0x0600	/* XNS */
87 #define	ETHERTYPE_NSAT		0x0601	/* XNS Address Translation (3Mb only) */
88 #define	ETHERTYPE_DLOG1 	0x0660	/* DLOG (?) */
89 #define	ETHERTYPE_DLOG2 	0x0661	/* DLOG (?) */
90 #define	ETHERTYPE_IP		0x0800	/* IP protocol */
91 #define	ETHERTYPE_X75		0x0801	/* X.75 Internet */
92 #define	ETHERTYPE_NBS		0x0802	/* NBS Internet */
93 #define	ETHERTYPE_ECMA		0x0803	/* ECMA Internet */
94 #define	ETHERTYPE_CHAOS 	0x0804	/* CHAOSnet */
95 #define	ETHERTYPE_X25		0x0805	/* X.25 Level 3 */
96 #define	ETHERTYPE_ARP		0x0806	/* Address resolution protocol */
97 #define	ETHERTYPE_NSCOMPAT	0x0807	/* XNS Compatibility */
98 #define	ETHERTYPE_FRARP 	0x0808	/* Frame Relay ARP (RFC1701) */
99 			     /* 0x081C	   Symbolics Private */
100 		    /* 0x0888 - 0x088A	   Xyplex */
101 #define	ETHERTYPE_UBDEBUG	0x0900	/* Ungermann-Bass network debugger */
102 #define	ETHERTYPE_IEEEPUP	0x0A00	/* Xerox IEEE802.3 PUP */
103 #define	ETHERTYPE_IEEEPUPAT	0x0A01	/* Xerox IEEE802.3 PUP Address Translation */
104 #define	ETHERTYPE_VINES 	0x0BAD	/* Banyan VINES */
105 #define	ETHERTYPE_VINESLOOP	0x0BAE	/* Banyan VINES Loopback */
106 #define	ETHERTYPE_VINESECHO	0x0BAF	/* Banyan VINES Echo */
107 
108 /*		       0x1000 - 0x100F	   Berkeley Trailer */
109 /*
110  * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
111  * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
112  * by an ETHER type (as given above) and then the (variable-length) header.
113  */
114 #define	ETHERTYPE_TRAIL		0x1000	/* Trailer packet */
115 #define	ETHERTYPE_NTRAILER	16
116 
117 #define	ETHERTYPE_DCA		0x1234	/* DCA - Multicast */
118 #define	ETHERTYPE_VALID 	0x1600	/* VALID system protocol */
119 #define	ETHERTYPE_DOGFIGHT	0x1989	/* Artificial Horizons ("Aviator" dogfight simulator [on Sun]) */
120 #define	ETHERTYPE_RCL		0x1995	/* Datapoint Corporation (RCL lan protocol) */
121 
122 					/* The following 3C0x types
123 					   are unregistered: */
124 #define	ETHERTYPE_NBPVCD	0x3C00	/* 3Com NBP virtual circuit datagram (like XNS SPP) not registered */
125 #define	ETHERTYPE_NBPSCD	0x3C01	/* 3Com NBP System control datagram not registered */
126 #define	ETHERTYPE_NBPCREQ	0x3C02	/* 3Com NBP Connect request (virtual cct) not registered */
127 #define	ETHERTYPE_NBPCRSP	0x3C03	/* 3Com NBP Connect repsonse not registered */
128 #define	ETHERTYPE_NBPCC		0x3C04	/* 3Com NBP Connect complete not registered */
129 #define	ETHERTYPE_NBPCLREQ	0x3C05	/* 3Com NBP Close request (virtual cct) not registered */
130 #define	ETHERTYPE_NBPCLRSP	0x3C06	/* 3Com NBP Close response not registered */
131 #define	ETHERTYPE_NBPDG		0x3C07	/* 3Com NBP Datagram (like XNS IDP) not registered */
132 #define	ETHERTYPE_NBPDGB	0x3C08	/* 3Com NBP Datagram broadcast not registered */
133 #define	ETHERTYPE_NBPCLAIM	0x3C09	/* 3Com NBP Claim NetBIOS name not registered */
134 #define	ETHERTYPE_NBPDLTE	0x3C0A	/* 3Com NBP Delete Netbios name not registered */
135 #define	ETHERTYPE_NBPRAS	0x3C0B	/* 3Com NBP Remote adaptor status request not registered */
136 #define	ETHERTYPE_NBPRAR	0x3C0C	/* 3Com NBP Remote adaptor response not registered */
137 #define	ETHERTYPE_NBPRST	0x3C0D	/* 3Com NBP Reset not registered */
138 
139 #define	ETHERTYPE_PCS		0x4242	/* PCS Basic Block Protocol */
140 #define	ETHERTYPE_IMLBLDIAG	0x424C	/* Information Modes Little Big LAN diagnostic */
141 #define	ETHERTYPE_DIDDLE	0x4321	/* THD - Diddle */
142 #define	ETHERTYPE_IMLBL		0x4C42	/* Information Modes Little Big LAN */
143 #define	ETHERTYPE_SIMNET	0x5208	/* BBN Simnet Private */
144 #define	ETHERTYPE_DECEXPER	0x6000	/* DEC Unassigned, experimental */
145 #define	ETHERTYPE_MOPDL		0x6001	/* DEC MOP dump/load */
146 #define	ETHERTYPE_MOPRC		0x6002	/* DEC MOP remote console */
147 #define	ETHERTYPE_DECnet	0x6003	/* DEC DECNET Phase IV route */
148 #define	ETHERTYPE_DN		ETHERTYPE_DECnet	/* libpcap, tcpdump */
149 #define	ETHERTYPE_LAT		0x6004	/* DEC LAT */
150 #define	ETHERTYPE_DECDIAG	0x6005	/* DEC diagnostic protocol (at interface initialization?) */
151 #define	ETHERTYPE_DECCUST	0x6006	/* DEC customer protocol */
152 #define	ETHERTYPE_SCA		0x6007	/* DEC LAVC, SCA */
153 #define	ETHERTYPE_AMBER		0x6008	/* DEC AMBER */
154 #define	ETHERTYPE_DECMUMPS	0x6009	/* DEC MUMPS */
155 		    /* 0x6010 - 0x6014	   3Com Corporation */
156 #define	ETHERTYPE_TRANSETHER	0x6558	/* Trans Ether Bridging (RFC1701)*/
157 #define	ETHERTYPE_RAWFR		0x6559	/* Raw Frame Relay (RFC1701) */
158 #define	ETHERTYPE_UBDL		0x7000	/* Ungermann-Bass download */
159 #define	ETHERTYPE_UBNIU		0x7001	/* Ungermann-Bass NIUs */
160 #define	ETHERTYPE_UBDIAGLOOP	0x7002	/* Ungermann-Bass diagnostic/loopback */
161 #define	ETHERTYPE_UBNMC		0x7003	/* Ungermann-Bass ??? (NMC to/from UB Bridge) */
162 #define	ETHERTYPE_UBBST		0x7005	/* Ungermann-Bass Bridge Spanning Tree */
163 #define	ETHERTYPE_OS9		0x7007	/* OS/9 Microware */
164 #define	ETHERTYPE_OS9NET	0x7009	/* OS/9 Net? */
165 		    /* 0x7020 - 0x7029	   LRT (England) (now Sintrom) */
166 #define	ETHERTYPE_RACAL		0x7030	/* Racal-Interlan */
167 #define	ETHERTYPE_PRIMENTS	0x7031	/* Prime NTS (Network Terminal Service) */
168 #define	ETHERTYPE_CABLETRON	0x7034	/* Cabletron */
169 #define	ETHERTYPE_CRONUSVLN	0x8003	/* Cronus VLN */
170 #define	ETHERTYPE_CRONUS	0x8004	/* Cronus Direct */
171 #define	ETHERTYPE_HP		0x8005	/* HP Probe */
172 #define	ETHERTYPE_NESTAR	0x8006	/* Nestar */
173 #define	ETHERTYPE_ATTSTANFORD	0x8008	/* AT&T/Stanford (local use) */
174 #define	ETHERTYPE_EXCELAN	0x8010	/* Excelan */
175 #define	ETHERTYPE_SG_DIAG	0x8013	/* SGI diagnostic type */
176 #define	ETHERTYPE_SG_NETGAMES	0x8014	/* SGI network games */
177 #define	ETHERTYPE_SG_RESV	0x8015	/* SGI reserved type */
178 #define	ETHERTYPE_SG_BOUNCE	0x8016	/* SGI bounce server */
179 #define	ETHERTYPE_APOLLODOMAIN	0x8019	/* Apollo DOMAIN */
180 #define	ETHERTYPE_TYMSHARE	0x802E	/* Tymeshare */
181 #define	ETHERTYPE_TIGAN		0x802F	/* Tigan, Inc. */
182 #define	ETHERTYPE_REVARP	0x8035	/* Reverse addr resolution protocol */
183 #define	ETHERTYPE_AEONIC	0x8036	/* Aeonic Systems */
184 #define	ETHERTYPE_IPXNEW	0x8037	/* IPX (Novell Netware?) */
185 #define	ETHERTYPE_LANBRIDGE	0x8038	/* DEC LANBridge */
186 #define	ETHERTYPE_DSMD	0x8039	/* DEC DSM/DDP */
187 #define	ETHERTYPE_ARGONAUT	0x803A	/* DEC Argonaut Console */
188 #define	ETHERTYPE_VAXELN	0x803B	/* DEC VAXELN */
189 #define	ETHERTYPE_DECDNS	0x803C	/* DEC DNS Naming Service */
190 #define	ETHERTYPE_ENCRYPT	0x803D	/* DEC Ethernet Encryption */
191 #define	ETHERTYPE_DECDTS	0x803E	/* DEC Distributed Time Service */
192 #define	ETHERTYPE_DECLTM	0x803F	/* DEC LAN Traffic Monitor */
193 #define	ETHERTYPE_DECNETBIOS	0x8040	/* DEC PATHWORKS DECnet NETBIOS Emulation */
194 #define	ETHERTYPE_DECLAST	0x8041	/* DEC Local Area System Transport */
195 			     /* 0x8042	   DEC Unassigned */
196 #define	ETHERTYPE_PLANNING	0x8044	/* Planning Research Corp. */
197 		    /* 0x8046 - 0x8047	   AT&T */
198 #define	ETHERTYPE_DECAM		0x8048	/* DEC Availability Manager for Distributed Systems DECamds (but someone at DEC says not) */
199 #define	ETHERTYPE_EXPERDATA	0x8049	/* ExperData */
200 #define	ETHERTYPE_VEXP		0x805B	/* Stanford V Kernel exp. */
201 #define	ETHERTYPE_VPROD		0x805C	/* Stanford V Kernel prod. */
202 #define	ETHERTYPE_ES		0x805D	/* Evans & Sutherland */
203 #define	ETHERTYPE_LITTLE	0x8060	/* Little Machines */
204 #define	ETHERTYPE_COUNTERPOINT	0x8062	/* Counterpoint Computers */
205 		    /* 0x8065 - 0x8066	   Univ. of Mass @ Amherst */
206 #define	ETHERTYPE_VEECO		0x8067	/* Veeco Integrated Auto. */
207 #define	ETHERTYPE_GENDYN	0x8068	/* General Dynamics */
208 #define	ETHERTYPE_ATT		0x8069	/* AT&T */
209 #define	ETHERTYPE_AUTOPHON	0x806A	/* Autophon */
210 #define	ETHERTYPE_COMDESIGN	0x806C	/* ComDesign */
211 #define	ETHERTYPE_COMPUGRAPHIC	0x806D	/* Compugraphic Corporation */
212 		    /* 0x806E - 0x8077	   Landmark Graphics Corp. */
213 #define	ETHERTYPE_MATRA		0x807A	/* Matra */
214 #define	ETHERTYPE_DDE		0x807B	/* Dansk Data Elektronik */
215 #define	ETHERTYPE_MERIT		0x807C	/* Merit Internodal (or Univ of Michigan?) */
216 		    /* 0x807D - 0x807F	   Vitalink Communications */
217 #define	ETHERTYPE_VLTLMAN	0x8080	/* Vitalink TransLAN III Management */
218 		    /* 0x8081 - 0x8083	   Counterpoint Computers */
219 		    /* 0x8088 - 0x808A	   Xyplex */
220 #define	ETHERTYPE_ATALK		0x809B	/* AppleTalk */
221 #define	ETHERTYPE_AT		ETHERTYPE_ATALK		/* old NetBSD */
222 #define	ETHERTYPE_APPLETALK	ETHERTYPE_ATALK		/* HP-UX */
223 		    /* 0x809C - 0x809E	   Datability */
224 #define	ETHERTYPE_SPIDER	0x809F	/* Spider Systems Ltd. */
225 			     /* 0x80A3	   Nixdorf */
226 		    /* 0x80A4 - 0x80B3	   Siemens Gammasonics Inc. */
227 		    /* 0x80C0 - 0x80C3	   DCA (Digital Comm. Assoc.) Data Exchange Cluster */
228 		    /* 0x80C4 - 0x80C5	   Banyan Systems */
229 #define	ETHERTYPE_PACER		0x80C6	/* Pacer Software */
230 #define	ETHERTYPE_APPLITEK	0x80C7	/* Applitek Corporation */
231 		    /* 0x80C8 - 0x80CC	   Intergraph Corporation */
232 		    /* 0x80CD - 0x80CE	   Harris Corporation */
233 		    /* 0x80CF - 0x80D2	   Taylor Instrument */
234 		    /* 0x80D3 - 0x80D4	   Rosemount Corporation */
235 #define	ETHERTYPE_SNA		0x80D5	/* IBM SNA Services over Ethernet */
236 #define	ETHERTYPE_VARIAN	0x80DD	/* Varian Associates */
237 		    /* 0x80DE - 0x80DF	   TRFS (Integrated Solutions Transparent Remote File System) */
238 		    /* 0x80E0 - 0x80E3	   Allen-Bradley */
239 		    /* 0x80E4 - 0x80F0	   Datability */
240 #define	ETHERTYPE_RETIX		0x80F2	/* Retix */
241 #define	ETHERTYPE_AARP		0x80F3	/* AppleTalk AARP */
242 		    /* 0x80F4 - 0x80F5	   Kinetics */
243 #define	ETHERTYPE_APOLLO	0x80F7	/* Apollo Computer */
244 #define ETHERTYPE_VLAN		0x8100	/* IEEE 802.1Q VLAN tagging (XXX conflicts) */
245 		    /* 0x80FF - 0x8101	   Wellfleet Communications (XXX conflicts) */
246 #define	ETHERTYPE_BOFL		0x8102	/* Wellfleet; BOFL (Breath OF Life) pkts [every 5-10 secs.] */
247 #define	ETHERTYPE_WELLFLEET	0x8103	/* Wellfleet Communications */
248 		    /* 0x8107 - 0x8109	   Symbolics Private */
249 #define	ETHERTYPE_TALARIS	0x812B	/* Talaris */
250 #define	ETHERTYPE_WATERLOO	0x8130	/* Waterloo Microsystems Inc. (XXX which?) */
251 #define	ETHERTYPE_HAYES		0x8130	/* Hayes Microcomputers (XXX which?) */
252 #define	ETHERTYPE_VGLAB		0x8131	/* VG Laboratory Systems */
253 		    /* 0x8132 - 0x8137	   Bridge Communications */
254 #define	ETHERTYPE_IPX		0x8137	/* Novell (old) NetWare IPX (ECONFIG E option) */
255 #define	ETHERTYPE_NOVELL	0x8138	/* Novell, Inc. */
256 		    /* 0x8139 - 0x813D	   KTI */
257 #define	ETHERTYPE_MUMPS		0x813F	/* M/MUMPS data sharing */
258 #define	ETHERTYPE_AMOEBA	0x8145	/* Vrije Universiteit (NL) Amoeba 4 RPC (obsolete) */
259 #define	ETHERTYPE_FLIP		0x8146	/* Vrije Universiteit (NL) FLIP (Fast Local Internet Protocol) */
260 #define	ETHERTYPE_VURESERVED	0x8147	/* Vrije Universiteit (NL) [reserved] */
261 #define	ETHERTYPE_LOGICRAFT	0x8148	/* Logicraft */
262 #define	ETHERTYPE_NCD		0x8149	/* Network Computing Devices */
263 #define	ETHERTYPE_ALPHA		0x814A	/* Alpha Micro */
264 #define	ETHERTYPE_SNMP		0x814C	/* SNMP over Ethernet (see RFC1089) */
265 		    /* 0x814D - 0x814E	   BIIN */
266 #define	ETHERTYPE_TEC	0x814F	/* Technically Elite Concepts */
267 #define	ETHERTYPE_RATIONAL	0x8150	/* Rational Corp */
268 		    /* 0x8151 - 0x8153	   Qualcomm */
269 		    /* 0x815C - 0x815E	   Computer Protocol Pty Ltd */
270 		    /* 0x8164 - 0x8166	   Charles River Data Systems */
271 #define	ETHERTYPE_XTP		0x817D	/* Protocol Engines XTP */
272 #define	ETHERTYPE_SGITW		0x817E	/* SGI/Time Warner prop. */
273 #define	ETHERTYPE_HIPPI_FP	0x8180	/* HIPPI-FP encapsulation */
274 #define	ETHERTYPE_STP		0x8181	/* Scheduled Transfer STP, HIPPI-ST */
275 		    /* 0x8182 - 0x8183	   Reserved for HIPPI-6400 */
276 		    /* 0x8184 - 0x818C	   SGI prop. */
277 #define	ETHERTYPE_MOTOROLA	0x818D	/* Motorola */
278 #define	ETHERTYPE_NETBEUI	0x8191	/* PowerLAN NetBIOS/NetBEUI (PC) */
279 		    /* 0x819A - 0x81A3	   RAD Network Devices */
280 		    /* 0x81B7 - 0x81B9	   Xyplex */
281 		    /* 0x81CC - 0x81D5	   Apricot Computers */
282 		    /* 0x81D6 - 0x81DD	   Artisoft Lantastic */
283 		    /* 0x81E6 - 0x81EF	   Polygon */
284 		    /* 0x81F0 - 0x81F2	   Comsat Labs */
285 		    /* 0x81F3 - 0x81F5	   SAIC */
286 		    /* 0x81F6 - 0x81F8	   VG Analytical */
287 		    /* 0x8203 - 0x8205	   QNX Software Systems Ltd. */
288 		    /* 0x8221 - 0x8222	   Ascom Banking Systems */
289 		    /* 0x823E - 0x8240	   Advanced Encryption Systems */
290 		    /* 0x8263 - 0x826A	   Charles River Data Systems */
291 		    /* 0x827F - 0x8282	   Athena Programming */
292 		    /* 0x829A - 0x829B	   Inst Ind Info Tech */
293 		    /* 0x829C - 0x82AB	   Taurus Controls */
294 		    /* 0x82AC - 0x8693	   Walker Richer & Quinn */
295 #define	ETHERTYPE_ACCTON	0x8390	/* Accton Technologies (unregistered) */
296 #define	ETHERTYPE_TALARISMC	0x852B	/* Talaris multicast */
297 #define	ETHERTYPE_KALPANA	0x8582	/* Kalpana */
298 		    /* 0x8694 - 0x869D	   Idea Courier */
299 		    /* 0x869E - 0x86A1	   Computer Network Tech */
300 		    /* 0x86A3 - 0x86AC	   Gateway Communications */
301 #define	ETHERTYPE_SECTRA	0x86DB	/* SECTRA */
302 #define	ETHERTYPE_IPV6		0x86DD	/* IP protocol version 6 */
303 #define	ETHERTYPE_DELTACON	0x86DE	/* Delta Controls */
304 #define	ETHERTYPE_ATOMIC	0x86DF	/* ATOMIC */
305 		    /* 0x86E0 - 0x86EF	   Landis & Gyr Powers */
306 		    /* 0x8700 - 0x8710	   Motorola */
307 #define	ETHERTYPE_RDP		0x8739	/* Control Technology Inc. RDP Without IP */
308 #define	ETHERTYPE_MICP		0x873A	/* Control Technology Inc. Mcast Industrial Ctrl Proto. */
309 		    /* 0x873B - 0x873C	   Control Technology Inc. Proprietary */
310 #define	ETHERTYPE_TCPCOMP	0x876B	/* TCP/IP Compression (RFC1701) */
311 #define	ETHERTYPE_IPAS		0x876C	/* IP Autonomous Systems (RFC1701) */
312 #define	ETHERTYPE_SECUREDATA	0x876D	/* Secure Data (RFC1701) */
313 #define	ETHERTYPE_FLOWCONTROL	0x8808	/* 802.3x flow control packet */
314 #define	ETHERTYPE_PPP		0x880B	/* PPP (obsolete by PPPOE) */
315 #define	ETHERTYPE_HITACHI	0x8820	/* Hitachi Cable (Optoelectronic Systems Laboratory) */
316 #define	ETHERTYPE_MPLS		0x8847	/* MPLS Unicast */
317 #define	ETHERTYPE_MPLS_MCAST	0x8848	/* MPLS Multicast */
318 #define	ETHERTYPE_AXIS		0x8856	/* Axis Communications AB proprietary bootstrap/config */
319 #define	ETHERTYPE_PPPOEDISC	0x8863	/* PPP Over Ethernet Discovery Stage */
320 #define	ETHERTYPE_PPPOE		0x8864	/* PPP Over Ethernet Session Stage */
321 #define	ETHERTYPE_LANPROBE	0x8888	/* HP LanProbe test? */
322 #define	ETHERTYPE_LOOPBACK	0x9000	/* Loopback: used to test interfaces */
323 #define	ETHERTYPE_LBACK		ETHERTYPE_LOOPBACK	/* DEC MOP loopback */
324 #define	ETHERTYPE_XNSSM		0x9001	/* 3Com (Formerly Bridge Communications), XNS Systems Management */
325 #define	ETHERTYPE_TCPSM		0x9002	/* 3Com (Formerly Bridge Communications), TCP/IP Systems Management */
326 #define	ETHERTYPE_BCLOOP	0x9003	/* 3Com (Formerly Bridge Communications), loopback detection */
327 #define	ETHERTYPE_DEBNI		0xAAAA	/* DECNET? Used by VAX 6220 DEBNI */
328 #define	ETHERTYPE_SONIX		0xFAF5	/* Sonix Arpeggio */
329 #define	ETHERTYPE_VITAL		0xFF00	/* BBN VITAL-LanBridge cache wakeups */
330 		    /* 0xFF00 - 0xFFOF	   ISC Bunker Ramo */
331 
332 #define	ETHERTYPE_MAX		0xFFFF	/* Maximum valid ethernet type, reserved */
333 
334 /*
335  * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
336  * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
337  * by an ETHER type (as given above) and then the (variable-length) header.
338  */
339 #define	ETHERTYPE_TRAIL		0x1000		/* Trailer packet */
340 #define	ETHERTYPE_NTRAILER	16
341 
342 #define	ETHERMTU	(ETHER_MAX_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
343 #define	ETHERMIN	(ETHER_MIN_LEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
344 #define	ETHERMTU_JUMBO	(ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN)
345 
346 #ifdef _KERNEL
347 
348 struct ifnet;
349 struct mbuf;
350 struct rtentry;
351 struct sockaddr;
352 
353 extern	uint32_t ether_crc32_le(const uint8_t *, size_t);
354 extern	uint32_t ether_crc32_be(const uint8_t *, size_t);
355 extern	void ether_demux(struct ifnet *, struct mbuf *);
356 extern	void ether_ifattach(struct ifnet *, const u_int8_t *);
357 extern	void ether_ifdetach(struct ifnet *);
358 extern	int  ether_ioctl(struct ifnet *, int, caddr_t);
359 extern	int  ether_output(struct ifnet *,
360 		   struct mbuf *, struct sockaddr *, struct rtentry *);
361 extern	int  ether_output_frame(struct ifnet *, struct mbuf *);
362 extern	char *ether_sprintf(const u_int8_t *);
363 
364 #else /* _KERNEL */
365 
366 #include <sys/cdefs.h>
367 
368 /*
369  * Ethernet address conversion/parsing routines.
370  */
371 __BEGIN_DECLS
372 struct	ether_addr *ether_aton(const char *);
373 int	ether_hostton(const char *, struct ether_addr *);
374 int	ether_line(const char *, struct ether_addr *, char *);
375 char 	*ether_ntoa(const struct ether_addr *);
376 int	ether_ntohost(char *, const struct ether_addr *);
377 __END_DECLS
378 
379 #endif /* !_KERNEL */
380 
381 #endif /* !_NET_ETHERNET_H_ */
382