#include <machine/rtems-bsd-user-space.h>
#ifdef __rtems__
#include <machine/rtems-bsd-program.h>
#include "rtems-bsd-tcpdump-namespace.h"
#endif /* __rtems__ */
/*
* 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)
*/
/* \summary: Virtual eXtensible Local Area Network (VXLAN) printer */
/* specification: RFC 7348 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <netdissect-stdinc.h>
#include "netdissect.h"
#include "extract.h"
static const char tstr[] = " [|VXLAN]";
#define VXLAN_HDR_LEN 8
/*
* VXLAN header, RFC7348
* Virtual eXtensible Local Area Network (VXLAN): A Framework
* for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks
*
* 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 < VXLAN_HDR_LEN)
goto trunc;
ND_TCHECK2(*bp, VXLAN_HDR_LEN);
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 - VXLAN_HDR_LEN, ndo->ndo_snapend - bp, NULL, NULL);
return;
trunc:
ND_PRINT((ndo, "%s", tstr));
}
#ifdef __rtems__
#include "rtems-bsd-tcpdump-print-vxlan-data.h"
#endif /* __rtems__ */
