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/* $OpenBSD: if_token.h,v 1.6 2003/11/16 20:30:07 avsm Exp $ */
/* $NetBSD: if_token.h,v 1.6 1999/11/19 20:41:19 thorpej Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: NetBSD: if_fddi.h,v 1.2 1995/08/19 04:35:28 cgd Exp
*/
#ifndef _NET_IF_TOKEN_H_
#define _NET_IF_TOKEN_H_
#define ISO88025_ADDR_LEN 6
/* Token Ring physical header */
struct token_header {
u_int8_t token_ac; /* access control field */
u_int8_t token_fc; /* frame control field */
u_int8_t token_dhost[ISO88025_ADDR_LEN]; /* dest. address */
u_int8_t token_shost[ISO88025_ADDR_LEN]; /* source address */
} __packed;
#define TOKEN_MAX_BRIDGE 8
/* Token Ring routing information field */
struct token_rif {
u_int16_t tr_rcf; /* route control field */
u_int16_t tr_rdf[TOKEN_MAX_BRIDGE]; /* route-designator fields */
} __packed;
/* standard values for address control and frame control field */
#define TOKEN_AC 0x10
#define TOKEN_FC 0x40
#define TOKEN_RI_PRESENT 0x80 /* routing info present bit */
#define TOKEN_RCF_LEN_MASK 0x1f00
#define TOKEN_RCF_BROADCAST_MASK 0xe000
#define TOKEN_RCF_BROADCAST_ALL 0x8000 /* all routes broadcast */
#define TOKEN_RCF_BROADCAST_SINGLE 0xc000 /* single route broadcast */
/*
* A Token-ring frame consists of
* header + rif + llcinfo + fcs
* 14 + 2 * (0 ... 9) + x + 4 octets
* where llcinfo contains the llcsnap header (8 octets) and the IP frame
*/
/* LLC INFO (802.5PD-2) */
#define TOKEN_RCF_FRAME0 0x0000 /* 516 */
#define TOKEN_RCF_FRAME1 0x0010 /* 1500 */
#define TOKEN_RCF_FRAME2 0x0020 /* 2052 */
#define TOKEN_RCF_FRAME3 0x0030 /* 4472 */
#define TOKEN_RCF_FRAME4 0x0040 /* 8144 */
#define TOKEN_RCF_FRAME5 0x0050 /* 11407 */
#define TOKEN_RCF_FRAME6 0x0060 /* 17800 */
#define TOKEN_RCF_FRAME7 0x0070 /* 65535 */
#define TOKEN_RCF_FRAME_MASK 0x0070
#define TOKEN_RCF_DIRECTION 0x0080
/*
* According to RFC 1042
*/
#define IPMTU_4MBIT_MAX 4464
#define IPMTU_16MBIT_MAX 8188
/*
* RFC 1042:
* It is recommended that all implementations support IP packets
* of at least 2002 octets.
*/
#define ISO88025_MTU 2002
/*
* This assumes that route information fields are appended to
* existing structures like llinfo_arp and token_header
*/
#define TOKEN_RIF(x) ((struct token_rif *) ((x) + 1))
/*
* This is a kludge to get at the token ring mac header and the source route
* information after m_adj() has been used on the mbuf.
* Note that m is always an mbuf with a packet header.
*/
#define M_TRHSTART(m) \
(ALIGN(((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf : &(m)->m_pktdat[0]) \
+ sizeof (struct token_header)) - sizeof(struct token_header))
#if defined(_KERNEL)
/*
* XXX we need if_ethersubr.c with all these defines
*/
#define tokenbroadcastaddr etherbroadcastaddr
#define token_ipmulticast_min ether_ipmulticast_min
#define token_ipmulticast_max ether_ipmulticast_max
#define token_addmulti ether_addmulti
#define token_delmulti ether_delmulti
#define token_sprintf ether_sprintf
void token_ifattach(struct ifnet *);
void token_input(struct ifnet *, struct mbuf *);
#endif
#endif /* _NET_IF_TOKEN_H_ */
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