2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
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10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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23 static const char rcsid[] =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-ipcomp.c,v 1.13 2000/12/12 09:58:41 itojun Exp $";
32 #include <sys/param.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
42 u_int8_t comp_nxt; /* Next Header */
43 u_int8_t comp_flags; /* Length of data, in 32bit */
44 u_int16_t comp_cpi; /* Compression parameter index */
47 #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
51 #include "interface.h"
52 #include "addrtoname.h"
55 ipcomp_print(register const u_char *bp, register const u_char *bp2, int *nhdr)
57 register const struct ipcomp *ipcomp;
58 register const u_char *ep;
60 #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
64 ipcomp = (struct ipcomp *)bp;
65 cpi = (u_int16_t)ntohs(ipcomp->comp_cpi);
67 /* 'ep' points to the end of available data. */
70 if ((u_char *)(ipcomp + 1) >= ep - sizeof(struct ipcomp)) {
71 fputs("[|IPCOMP]", stdout);
74 printf("IPComp(cpi=0x%04x)", cpi);
76 #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
81 * We may want to decompress the packet here. Packet buffer
82 * management is a headache (if we decompress, packet will become
86 *nhdr = ipcomp->comp_nxt;
87 advance = sizeof(struct ipcomp);