/* specification: draft-hasmit-otv-04 */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
-#include <netdissect-stdinc.h>
+#include "netdissect-stdinc.h"
+#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
+#define OTV_HDR_LEN 8
+
/*
* OTV header, draft-hasmit-otv-04
*
{
uint8_t flags;
- ND_PRINT((ndo, "OTV, "));
- if (len < 8)
- goto trunc;
+ ndo->ndo_protocol = "otv";
+ ND_PRINT("OTV, ");
+ if (len < OTV_HDR_LEN) {
+ ND_PRINT("[length %u < %u]", len, OTV_HDR_LEN);
+ goto invalid;
+ }
- ND_TCHECK(*bp);
- flags = *bp;
- ND_PRINT((ndo, "flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags));
+ flags = GET_U_1(bp);
+ ND_PRINT("flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags);
bp += 1;
- ND_TCHECK2(*bp, 3);
- ND_PRINT((ndo, "overlay %u, ", EXTRACT_24BITS(bp)));
+ ND_PRINT("overlay %u, ", GET_BE_U_3(bp));
bp += 3;
- ND_TCHECK2(*bp, 3);
- ND_PRINT((ndo, "instance %u\n", EXTRACT_24BITS(bp)));
+ ND_PRINT("instance %u\n", GET_BE_U_3(bp));
bp += 3;
/* Reserved */
- ND_TCHECK(*bp);
+ ND_TCHECK_1(bp);
bp += 1;
- ether_print(ndo, bp, len - 8, ndo->ndo_snapend - bp, NULL, NULL);
+ ether_print(ndo, bp, len - OTV_HDR_LEN, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL);
return;
-trunc:
- ND_PRINT((ndo, " [|OTV]"));
+invalid:
+ nd_print_invalid(ndo);
+ ND_TCHECK_LEN(bp, len);
}