1251127Sdelphij/*
2251127Sdelphij * Redistribution and use in source and binary forms, with or without
3251127Sdelphij * modification, are permitted provided that: (1) source code
4251127Sdelphij * distributions retain the above copyright notice and this paragraph
5251127Sdelphij * in its entirety, and (2) distributions including binary code include
6251127Sdelphij * the above copyright notice and this paragraph in its entirety in
7251127Sdelphij * the documentation or other materials provided with the distribution.
8251127Sdelphij * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
9251127Sdelphij * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
10251127Sdelphij * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11251127Sdelphij * FOR A PARTICULAR PURPOSE.
12251127Sdelphij *
13251127Sdelphij * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com)
14251127Sdelphij */
15251127Sdelphij
16276788Sdelphij#define NETDISSECT_REWORKED
17251127Sdelphij#ifdef HAVE_CONFIG_H
18251127Sdelphij#include "config.h"
19251127Sdelphij#endif
20251127Sdelphij
21251127Sdelphij#include <tcpdump-stdinc.h>
22251127Sdelphij
23251127Sdelphij#include "interface.h"
24251127Sdelphij#include "extract.h"
25251127Sdelphij
26251127Sdelphij/*
27251127Sdelphij * OTV header, draft-hasmit-otv-04
28251127Sdelphij *
29251127Sdelphij *     0                   1                   2                   3
30251127Sdelphij *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
31251127Sdelphij *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
32251127Sdelphij *     |R|R|R|R|I|R|R|R|           Overlay ID                          |
33251127Sdelphij *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
34251127Sdelphij *     |          Instance ID                          | Reserved      |
35251127Sdelphij *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
36251127Sdelphij */
37251127Sdelphij
38251127Sdelphijvoid
39276788Sdelphijotv_print(netdissect_options *ndo, const u_char *bp, u_int len)
40251127Sdelphij{
41276788Sdelphij    uint8_t flags;
42276788Sdelphij    uint32_t overlay_id;
43276788Sdelphij    uint32_t instance_id;
44276788Sdelphij
45251127Sdelphij    if (len < 8) {
46276788Sdelphij        ND_PRINT((ndo, "[|OTV]"));
47251127Sdelphij        return;
48251127Sdelphij    }
49251127Sdelphij
50251127Sdelphij    flags = *bp;
51251127Sdelphij    bp += 1;
52251127Sdelphij
53251127Sdelphij    overlay_id = EXTRACT_24BITS(bp);
54251127Sdelphij    bp += 3;
55251127Sdelphij
56251127Sdelphij    instance_id = EXTRACT_24BITS(bp);
57251127Sdelphij    bp += 4;
58251127Sdelphij
59276788Sdelphij    ND_PRINT((ndo, "OTV, "));
60276788Sdelphij    ND_PRINT((ndo, "flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags));
61276788Sdelphij    ND_PRINT((ndo, "overlay %u, ", overlay_id));
62276788Sdelphij    ND_PRINT((ndo, "instance %u\n", instance_id));
63251127Sdelphij
64276788Sdelphij    ether_print(ndo, bp, len - 8, len - 8, NULL, NULL);
65251127Sdelphij}
66