freebsd-dev/contrib/tcpdump/print-ipcomp.c
Gleb Smirnoff 3340d77368 Update tcpdump to 4.9.0.
It fixes many buffer overflow in different protocol parsers, but none of
them are critical, even in absense of Capsicum.

Security:	CVE-2016-7922, CVE-2016-7923, CVE-2016-7924, CVE-2016-7925
Security:	CVE-2016-7926, CVE-2016-7927, CVE-2016-7928, CVE-2016-7929
Security:	CVE-2016-7930, CVE-2016-7931, CVE-2016-7932, CVE-2016-7933
Security:	CVE-2016-7934, CVE-2016-7935, CVE-2016-7936, CVE-2016-7937
Security:	CVE-2016-7938, CVE-2016-7939, CVE-2016-7940, CVE-2016-7973
Security:	CVE-2016-7974, CVE-2016-7975, CVE-2016-7983, CVE-2016-7984
Security:	CVE-2016-7985, CVE-2016-7986, CVE-2016-7992, CVE-2016-7993
Security:	CVE-2016-8574, CVE-2016-8575, CVE-2017-5202, CVE-2017-5203
Security:	CVE-2017-5204, CVE-2017-5205, CVE-2017-5341, CVE-2017-5342
Security:	CVE-2017-5482, CVE-2017-5483, CVE-2017-5484, CVE-2017-5485
Security:	CVE-2017-5486
2017-02-01 20:26:42 +00:00

70 lines
2.3 KiB
C

/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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, (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, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* 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.
*/
/* \summary: IP Payload Compression Protocol (IPComp) printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <netdissect-stdinc.h>
struct ipcomp {
uint8_t comp_nxt; /* Next Header */
uint8_t comp_flags; /* Length of data, in 32bit */
uint16_t comp_cpi; /* Compression parameter index */
};
#include "netdissect.h"
#include "extract.h"
void
ipcomp_print(netdissect_options *ndo, register const u_char *bp)
{
register const struct ipcomp *ipcomp;
uint16_t cpi;
ipcomp = (const struct ipcomp *)bp;
ND_TCHECK(*ipcomp);
cpi = EXTRACT_16BITS(&ipcomp->comp_cpi);
ND_PRINT((ndo, "IPComp(cpi=0x%04x)", cpi));
/*
* XXX - based on the CPI, we could decompress the packet here.
* Packet buffer management is a headache (if we decompress,
* packet will become larger).
*
* We would decompress the packet and then call a routine that,
* based on ipcomp->comp_nxt, dissects the decompressed data.
*
* Until we do that, however, we just return -1, so that
* the loop that processes "protocol"/"next header" types
* stops - there's nothing more it can do with a compressed
* payload.
*/
return;
trunc:
ND_PRINT((ndo, "[|IPCOMP]"));
return;
}