61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code
|
|
* distributions retain the above copyright notice and this paragraph
|
|
* in its entirety, and (2) distributions including binary code include
|
|
* the above copyright notice and this paragraph in its entirety in
|
|
* the documentation or other materials provided with the distribution.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
|
|
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
|
|
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com)
|
|
*/
|
|
|
|
#define NETDISSECT_REWORKED
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include "interface.h"
|
|
#include "extract.h"
|
|
|
|
/*
|
|
* VXLAN header, draft-mahalingam-dutt-dcops-vxlan-03
|
|
*
|
|
* 0 1 2 3
|
|
* 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
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* |R|R|R|R|I|R|R|R| Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | VXLAN Network Identifier (VNI) | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
void
|
|
vxlan_print(netdissect_options *ndo, const u_char *bp, u_int len)
|
|
{
|
|
uint8_t flags;
|
|
uint32_t vni;
|
|
|
|
if (len < 8) {
|
|
ND_PRINT((ndo, "[|VXLAN]"));
|
|
return;
|
|
}
|
|
|
|
flags = *bp;
|
|
bp += 4;
|
|
|
|
vni = EXTRACT_24BITS(bp);
|
|
bp += 4;
|
|
|
|
ND_PRINT((ndo, "VXLAN, "));
|
|
ND_PRINT((ndo, "flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags));
|
|
ND_PRINT((ndo, "vni %u\n", vni));
|
|
|
|
ether_print(ndo, bp, len - 8, len - 8, NULL, NULL);
|
|
}
|