mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-27 20:14:12 +08:00
76 lines
2.1 KiB
C
76 lines
2.1 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)
|
|
*/
|
|
|
|
/* \summary: Overlay Transport Virtualization (OTV) printer */
|
|
|
|
/* specification: draft-hasmit-otv-04 */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "netdissect-stdinc.h"
|
|
|
|
#include "netdissect.h"
|
|
#include "extract.h"
|
|
|
|
#define OTV_HDR_LEN 8
|
|
|
|
/*
|
|
* OTV header, draft-hasmit-otv-04
|
|
*
|
|
* 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| Overlay ID |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Instance ID | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
void
|
|
otv_print(netdissect_options *ndo, const u_char *bp, u_int len)
|
|
{
|
|
uint8_t flags;
|
|
|
|
ndo->ndo_protocol = "otv";
|
|
ND_PRINT("OTV, ");
|
|
if (len < OTV_HDR_LEN)
|
|
goto trunc;
|
|
|
|
ND_TCHECK_1(bp);
|
|
flags = EXTRACT_U_1(bp);
|
|
ND_PRINT("flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags);
|
|
bp += 1;
|
|
|
|
ND_TCHECK_3(bp);
|
|
ND_PRINT("overlay %u, ", EXTRACT_BE_U_3(bp));
|
|
bp += 3;
|
|
|
|
ND_TCHECK_3(bp);
|
|
ND_PRINT("instance %u\n", EXTRACT_BE_U_3(bp));
|
|
bp += 3;
|
|
|
|
/* Reserved */
|
|
ND_TCHECK_1(bp);
|
|
bp += 1;
|
|
|
|
ether_print(ndo, bp, len - OTV_HDR_LEN, ndo->ndo_snapend - bp, NULL, NULL);
|
|
return;
|
|
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|