1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
* This file is part of libtrace
*
* Copyright (c) 2014 The University of Waikato, Hamilton, New Zealand.
*
* Authors: Perry Lorier
*
* All rights reserved.
*
* This code has been developed by the University of Waikato WAND
* research group. For further information please see http://www.wand.net.nz/
*
* libtrace is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libtrace is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libtrace; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include "libtrace.h"
void *trace_get_payload_from_vxlan(libtrace_vxlan_t *vxlan, uint32_t *remaining)
{
if (remaining) {
if (*remaining < sizeof(*vxlan)) {
*remaining = 0;
return NULL;
}
*remaining -= sizeof(*vxlan);
}
return (void*)((char *)vxlan + sizeof(*vxlan));
}
libtrace_vxlan_t *trace_get_vxlan_from_udp(libtrace_udp_t *udp,
uint32_t *remaining)
{
if (udp->dest != htons(4789)) { /* UDP port number for vxlan */
return NULL; /* Not a vxlan packet. */
}
return trace_get_payload_from_udp(udp, remaining);
}
|
