1 /* fddi.c
2
3 Packet assembly code, originally contributed by Archie Cobbs. */
4
5 /*
6 * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
7 * Copyright (c) 1996-2003 by Internet Software Consortium
8 *
9 * This Source Code Form is subject to the terms of the Mozilla Public
10 * License, v. 2.0. If a copy of the MPL was not distributed with this
11 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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 */
28
29 #include "dhcpd.h"
30
31 #if defined (DEC_FDDI)
32 #include <netinet/if_fddi.h>
33 #include <net/if_llc.h>
34
35 #if defined (PACKET_ASSEMBLY) || defined (PACKET_DECODING)
36 #include "includes/netinet/if_ether.h"
37 #endif /* PACKET_ASSEMBLY || PACKET_DECODING */
38
39 #if defined (PACKET_ASSEMBLY)
40 /* Assemble an hardware header... */
41
assemble_fddi_header(interface,buf,bufix,to)42 void assemble_fddi_header (interface, buf, bufix, to)
43 struct interface_info *interface;
44 unsigned char *buf;
45 unsigned *bufix;
46 struct hardware *to;
47 {
48 struct fddi_header fh;
49 struct llc lh;
50
51 if (to && to -> hlen == 7)
52 memcpy (fh.fddi_dhost, &to -> hbuf [1],
53 sizeof (fh.fddi_dhost));
54 memcpy (fh.fddi_shost,
55 &interface -> hw_address.hbuf [1], sizeof (fh.fddi_shost));
56 fh.fddi_fc = FDDIFC_LLC_ASYNC;
57 memcpy (&buf [*bufix], &fh, sizeof fh);
58 *bufix += sizeof fh;
59
60 lh.llc_dsap = LLC_SNAP_LSAP;
61 lh.llc_ssap = LLC_SNAP_LSAP;
62 lh.llc_un.type_snap.control = LLC_UI;
63 lh.llc_un.type_snap.ether_type = htons (ETHERTYPE_IP);
64 memcpy (&buf [*bufix], &lh, LLC_SNAP_LEN);
65 *bufix += LLC_SNAP_LEN;
66 }
67 #endif /* PACKET_ASSEMBLY */
68
69 #ifdef PACKET_DECODING
70 /* Decode a hardware header... */
71
decode_fddi_header(interface,buf,bufix,from)72 ssize_t decode_fddi_header (interface, buf, bufix, from)
73 struct interface_info *interface;
74 unsigned char *buf;
75 unsigned bufix;
76 struct hardware *from;
77 {
78 struct fddi_header fh;
79 struct llc lh;
80
81 from -> hbuf [0] = HTYPE_FDDI;
82 memcpy (&from -> hbuf [1], fh.fddi_shost, sizeof fh.fddi_shost);
83 return FDDI_HEADER_SIZE + LLC_SNAP_LEN;
84 }
85 #endif /* PACKET_DECODING */
86 #endif /* DEC_FDDI */
87