112 lines
4.0 KiB
C
112 lines
4.0 KiB
C
/* fddi.c
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Packet assembly code, originally contributed by Archie Cobbs. */
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/*
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* Copyright (c) 1996-2002 Internet Software Consortium.
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* 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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*
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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 Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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* This software has been written for the Internet Software Consortium
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* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
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* To learn more about the Internet Software Consortium, see
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* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
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* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
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* ``http://www.nominum.com''.
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*/
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#ifndef lint
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static char copyright[] =
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"$Id: fddi.c,v 1.4 2003/02/18 17:08:41 drochner Exp $ Copyright (c) 1996-2002 The Internet Software Consortium. All rights reserved.\n";
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#endif /* not lint */
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#include "dhcpd.h"
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#if defined (DEC_FDDI) || defined (NETBSD_FDDI)
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#if defined (DEC_FDDI)
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#include <netinet/if_fddi.h>
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#include <net/if_llc.h>
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#endif /* DEC_FDDI */
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#if defined (NETBSD_FDDI)
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#include <net/if_fddi.h>
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#include <net/if_llc.h>
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#define LLC_SNAP_LEN LLC_SNAPFRAMELEN
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#endif /* NETBSD_FDDI */
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#if defined (PACKET_ASSEMBLY) || defined (PACKET_DECODING)
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#include "includes/netinet/if_ether.h"
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#endif /* PACKET_ASSEMBLY || PACKET_DECODING */
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#if defined (PACKET_ASSEMBLY)
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/* Assemble an hardware header... */
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void assemble_fddi_header (struct interface_info *interface,
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unsigned char *buf, unsigned *bufix, struct hardware *to)
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{
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struct fddi_header fh;
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struct llc lh;
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if (to && to -> hlen == 7)
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memcpy (fh.fddi_dhost, &to -> hbuf [1],
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sizeof (fh.fddi_dhost));
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memcpy (fh.fddi_shost,
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&interface -> hw_address.hbuf [1], sizeof (fh.fddi_shost));
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fh.fddi_fc = FDDIFC_LLC_ASYNC;
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memcpy (&buf [*bufix], &fh, sizeof fh);
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*bufix += sizeof fh;
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memset (&lh, 0, sizeof lh);
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lh.llc_dsap = LLC_SNAP_LSAP;
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lh.llc_ssap = LLC_SNAP_LSAP;
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lh.llc_un.type_snap.control = LLC_UI;
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lh.llc_un.type_snap.ether_type = htons (ETHERTYPE_IP);
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memcpy (&buf [*bufix], &lh, LLC_SNAP_LEN);
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*bufix += LLC_SNAP_LEN;
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}
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#endif /* PACKET_ASSEMBLY */
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#ifdef PACKET_DECODING
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/* Decode a hardware header... */
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ssize_t decode_fddi_header (struct interface_info *interface,
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unsigned char *buf, unsigned bufix, struct hardware *from)
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{
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struct fddi_header fh;
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memcpy(&fh, buf + bufix, FDDI_HEADER_SIZE);
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from -> hbuf [0] = HTYPE_FDDI;
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from -> hlen = (sizeof fh.fddi_shost) + 1;
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memcpy (&from -> hbuf [1], fh.fddi_shost, sizeof fh.fddi_shost);
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return FDDI_HEADER_SIZE + LLC_SNAP_LEN;
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}
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#endif /* PACKET_DECODING */
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#endif /* DEC_FDDI || NETBSD_FDDI */
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