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6bc44295cf
If a protocol that runs under a link-layer protocol would print the link-layer addresses for the packet as source and destination addresses for the packet, don't have it blithely assume those link-layer addresses are present or are at a particular offset from the beginning of that protocol's data; Ethertypes, for example, are used by a number of protocols, not all of which have Ethernet headers and not all of which have any MAC headers. Instead, pass the printers for those protocols structures with a pointer to the address data and a pointer to a routine that prints the address. Fixes some heap overflows found with American Fuzzy Lop by Hanno Böck.
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* Copyright (c) 2013 The TCPDUMP project
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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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* 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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* Original code by Ola Martin Lykkja (ola.lykkja@q-free.com)
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*/
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/* \summary: Communication access for land mobiles (CALM) printer */
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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 <netdissect-stdinc.h>
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#include "netdissect.h"
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#include "addrtoname.h"
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/*
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ISO 29281:2009
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Intelligent Transport Systems . Communications access for land mobiles (CALM)
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CALM non-IP networking
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*/
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/*
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* This is the top level routine of the printer. 'bp' points
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* to the calm header of the packet.
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*/
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void
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calm_fast_print(netdissect_options *ndo, const u_char *bp, u_int length, const struct lladdr_info *src)
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{
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int srcNwref;
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int dstNwref;
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ND_TCHECK2(*bp, 2);
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if (length < 2)
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goto trunc;
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srcNwref = bp[0];
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dstNwref = bp[1];
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length -= 2;
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bp += 2;
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ND_PRINT((ndo, "CALM FAST"));
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if (src != NULL)
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ND_PRINT((ndo, " src:%s", (src->addr_string)(ndo, src->addr)));
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ND_PRINT((ndo, "; "));
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ND_PRINT((ndo, "SrcNwref:%d; ", srcNwref));
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ND_PRINT((ndo, "DstNwref:%d; ", dstNwref));
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if (ndo->ndo_vflag)
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ND_DEFAULTPRINT(bp, length);
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return;
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trunc:
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ND_PRINT((ndo, "[|calm fast]"));
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return;
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}
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/*
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* Local Variables:
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* c-style: whitesmith
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* c-basic-offset: 8
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* End:
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*/
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