b636d99d91
For now, printing of Sun RPC requests is disabled because we do not yet have the RPC header files. This should affect basically noone, as we do not have any RPC-based programs yet, for the same reason. Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* $OpenBSD: print-carp.c,v 1.6 2009/10/27 23:59:55 deraadt Exp $ */
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/*
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* Copyright (c) 2000 William C. Fenner.
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* All rights reserved.
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*
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* Kevin Steves <ks@hp.se> July 2000
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* Modified to:
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* - print version, type string and packet length
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* - print IP address count if > 1 (-v)
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* - verify checksum (-v)
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* - print authentication string (-v)
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*
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* Copyright (c) 2011 Advanced Computing Technologies
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* George V. Neille-Neil
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*
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* Modified to:
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* - work correctly with CARP
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* - compile into the latest tcpdump
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* - print out the counter
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* The name of William C. Fenner may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h" /* for checksum structure and functions */
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#include "extract.h"
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void
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carp_print(netdissect_options *ndo, register const u_char *bp, register u_int len, int ttl)
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{
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int version, type;
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const char *type_s;
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ND_TCHECK(bp[0]);
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version = (bp[0] & 0xf0) >> 4;
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type = bp[0] & 0x0f;
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if (type == 1)
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type_s = "advertise";
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else
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type_s = "unknown";
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ND_PRINT((ndo, "CARPv%d-%s %d: ", version, type_s, len));
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if (ttl != 255)
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ND_PRINT((ndo, "[ttl=%d!] ", ttl));
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if (version != 2 || type != 1)
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return;
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ND_TCHECK(bp[2]);
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ND_TCHECK(bp[5]);
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ND_PRINT((ndo, "vhid=%d advbase=%d advskew=%d authlen=%d ",
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bp[1], bp[5], bp[2], bp[3]));
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if (ndo->ndo_vflag) {
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struct cksum_vec vec[1];
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vec[0].ptr = (const uint8_t *)bp;
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vec[0].len = len;
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if (ND_TTEST2(bp[0], len) && in_cksum(vec, 1))
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ND_PRINT((ndo, " (bad carp cksum %x!)",
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EXTRACT_16BITS(&bp[6])));
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}
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ND_PRINT((ndo, "counter=%" PRIu64, EXTRACT_64BITS(&bp[8])));
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return;
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trunc:
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ND_PRINT((ndo, "[|carp]"));
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}
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