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dhcp 4.1 r7

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