external/bsd/dhcp/dist/common/fddi.c

   1 /*      $NetBSD: fddi.c,v 1.1.1.2 2014/07/12 11:57:44 spz Exp $ */
   2 /* fddi.c
   3
   4    Packet assembly code, originally contributed by Archie Cobbs. */
   5
   6 /*
   7  * Copyright (c) 2004,2007,2009,2014 by Internet Systems Consortium, Inc. ("ISC")
   8  * Copyright (c) 1996-2003 by Internet Software Consortium
   9  *
  10  * Permission to use, copy, modify, and distribute this software for any
  11  * purpose with or without fee is hereby granted, provided that the above
  12  * copyright notice and this permission notice appear in all copies.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  15  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  16  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  17  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  19  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  20  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  *
  22  *   Internet Systems Consortium, Inc.
  23  *   950 Charter Street
  24  *   Redwood City, CA 94063
  25  *   <info@isc.org>
  26  *   https://www.isc.org/
  27  *
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __RCSID("$NetBSD: fddi.c,v 1.1.1.2 2014/07/12 11:57:44 spz Exp $");
  32
  33 #include "dhcpd.h"
  34
  35 #if defined (DEC_FDDI)
  36 #include <netinet/if_fddi.h>
  37 #include <net/if_llc.h>
  38
  39 #if defined (PACKET_ASSEMBLY) || defined (PACKET_DECODING)
  40 #include "includes/netinet/if_ether.h"
  41 #endif /* PACKET_ASSEMBLY || PACKET_DECODING */
  42
  43 #if defined (PACKET_ASSEMBLY)
  44 /* Assemble an hardware header... */
  45
  46 void assemble_fddi_header (interface, buf, bufix, to)
  47         struct interface_info *interface;
  48         unsigned char *buf;
  49         unsigned *bufix;
  50         struct hardware *to;
  51 {
  52         struct fddi_header   fh;
  53         struct llc     lh;
  54
  55         if (to && to -> hlen == 7)
  56                 memcpy (fh.fddi_dhost, &to -> hbuf [1],
  57                         sizeof (fh.fddi_dhost));
  58         memcpy (fh.fddi_shost,
  59                 &interface -> hw_address.hbuf [1], sizeof (fh.fddi_shost));
  60         fh.fddi_fc = FDDIFC_LLC_ASYNC;
  61         memcpy (&buf [*bufix], &fh, sizeof fh);
  62         *bufix += sizeof fh;
  63
  64         lh.llc_dsap = LLC_SNAP_LSAP;
  65         lh.llc_ssap = LLC_SNAP_LSAP;
  66         lh.llc_un.type_snap.control = LLC_UI;
  67         lh.llc_un.type_snap.ether_type = htons (ETHERTYPE_IP);
  68         memcpy (&buf [*bufix], &lh, LLC_SNAP_LEN);
  69         *bufix += LLC_SNAP_LEN;
  70 }
  71 #endif /* PACKET_ASSEMBLY */
  72
  73 #ifdef PACKET_DECODING
  74 /* Decode a hardware header... */
  75
  76 ssize_t decode_fddi_header (interface, buf, bufix, from)
  77      struct interface_info *interface;
  78      unsigned char *buf;
  79      unsigned bufix;
  80      struct hardware *from;
  81 {
  82         struct fddi_header   fh;
  83         struct llc     lh;
  84
  85         from -> hbuf [0] = HTYPE_FDDI;
  86         memcpy (&from -> hbuf [1], fh.fddi_shost, sizeof fh.fddi_shost);
  87         return FDDI_HEADER_SIZE + LLC_SNAP_LEN;
  88 }
  89 #endif /* PACKET_DECODING */
  90 #endif /* DEC_FDDI */