126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/* $NetBSD: if_token.h,v 1.16 2008/02/20 17:05:53 matt Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: NetBSD: if_fddi.h,v 1.2 1995/08/19 04:35:28 cgd Exp
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*/
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#ifndef _NET_IF_TOKEN_H_
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#define _NET_IF_TOKEN_H_
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#define ISO88025_ADDR_LEN 6
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/* Token Ring physical header */
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struct token_header {
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uint8_t token_ac; /* access control field */
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uint8_t token_fc; /* frame control field */
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uint8_t token_dhost[ISO88025_ADDR_LEN]; /* dest. address */
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uint8_t token_shost[ISO88025_ADDR_LEN]; /* source address */
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} __packed;
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#define TOKEN_MAX_BRIDGE 8
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/* Token Ring routing information field */
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struct token_rif {
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uint16_t tr_rcf; /* route control field */
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uint16_t tr_rdf[TOKEN_MAX_BRIDGE]; /* route-designator fields */
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} __packed;
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/* standard values for address control and frame control field */
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#define TOKEN_AC 0x10
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#define TOKEN_FC 0x40
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#define TOKEN_RI_PRESENT 0x80 /* routing info present bit */
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#define TOKEN_RCF_LEN_MASK 0x1f00
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#define TOKEN_RCF_BROADCAST_MASK 0xe000
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#define TOKEN_RCF_BROADCAST_ALL 0x8000 /* all routes broadcast */
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#define TOKEN_RCF_BROADCAST_SINGLE 0xc000 /* single route broadcast */
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/*
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* A Token-ring frame consists of
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* header + rif + llcinfo + fcs
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* 14 + 2 * (0 ... 9) + x + 4 octets
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* where llcinfo contains the llcsnap header (8 octets) and the IP frame
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*/
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/* LLC INFO (802.5PD-2) */
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#define TOKEN_RCF_FRAME0 0x0000 /* 516 */
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#define TOKEN_RCF_FRAME1 0x0010 /* 1500 */
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#define TOKEN_RCF_FRAME2 0x0020 /* 2052 */
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#define TOKEN_RCF_FRAME3 0x0030 /* 4472 */
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#define TOKEN_RCF_FRAME4 0x0040 /* 8144 */
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#define TOKEN_RCF_FRAME5 0x0050 /* 11407 */
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#define TOKEN_RCF_FRAME6 0x0060 /* 17800 */
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#define TOKEN_RCF_FRAME7 0x0070 /* 65535 */
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#define TOKEN_RCF_FRAME_MASK 0x0070
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#define TOKEN_RCF_DIRECTION 0x0080
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/*
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* According to RFC 1042
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*/
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#define IPMTU_4MBIT_MAX 4464
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#define IPMTU_16MBIT_MAX 8188
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/*
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* RFC 1042:
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* It is recommended that all implementations support IP packets
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* of at least 2002 octets.
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*/
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#define ISO88025_MTU 2002
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/*
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* This assumes that route information fields are appended to
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* existing structures like llinfo_arp and token_header
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*/
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#define TOKEN_RIF(x) ((struct token_rif *) ((x) + 1))
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/*
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* This is a kludge to get at the token ring mac header and the source route
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* information after m_adj() has been used on the mbuf.
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* Note that m is always an mbuf with a packet header.
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*/
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#define M_TRHSTART(m) \
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(ALIGN(((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf : &(m)->m_pktdat[0]) \
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+ sizeof (struct token_header)) - sizeof(struct token_header))
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#if defined(_KERNEL)
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/*
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* XXX we need if_ethersubr.c with all these defines
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*/
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#define tokenbroadcastaddr etherbroadcastaddr
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#define token_ipmulticast_min ether_ipmulticast_min
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#define token_ipmulticast_max ether_ipmulticast_max
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#define token_sprintf ether_sprintf
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void token_ifattach(struct ifnet *, void *);
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void token_ifdetach(struct ifnet *);
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#endif
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#endif /* !_NET_IF_TOKEN_H_ */
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