projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| c8cf0f94 PA |
1 | /* |
| 2 | * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 | |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 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 | |
| 9 | * this paragraph in its entirety in the documentation or other materials | |
| 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 | |
| 16 | * written permission. | |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED | |
| 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF | |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef lint | |
| 23 | static const char rcsid[] _U_ = | |
| 24 | "@(#) $Header: /tcpdump/master/tcpdump/print-ipcomp.c,v 1.20 2003/11/19 00:36:08 guy Exp $"; | |
| 25 | #endif | |
| 26 | ||
| 27 | #ifdef HAVE_CONFIG_H | |
| 28 | #include "config.h" | |
| 29 | #endif | |
| 30 | ||
| 31 | #include <string.h> | |
| 32 | #include <tcpdump-stdinc.h> | |
| 33 | ||
| 34 | #include <stdio.h> | |
| 35 | ||
| 36 | struct ipcomp { | |
| 37 | u_int8_t comp_nxt; /* Next Header */ | |
| 38 | u_int8_t comp_flags; /* Length of data, in 32bit */ | |
| 39 | u_int16_t comp_cpi; /* Compression parameter index */ | |
| 40 | }; | |
| 41 | ||
| 42 | #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) | |
| 43 | #include <zlib.h> | |
| 44 | #endif | |
| 45 | ||
| 46 | #include "interface.h" | |
| 47 | #include "addrtoname.h" | |
| 48 | #include "extract.h" | |
| 49 | ||
| 50 | int | |
| 51 | ipcomp_print(register const u_char *bp, int *nhdr _U_) | |
| 52 | { | |
| 53 | register const struct ipcomp *ipcomp; | |
| 54 | register const u_char *ep; | |
| 55 | u_int16_t cpi; | |
| 56 | #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) | |
| 57 | int advance; | |
| 58 | #endif | |
| 59 | ||
| 60 | ipcomp = (struct ipcomp *)bp; | |
| 61 | cpi = EXTRACT_16BITS(&ipcomp->comp_cpi); | |
| 62 | ||
| 63 | /* 'ep' points to the end of available data. */ | |
| 64 | ep = snapend; | |
| 65 | ||
| 66 | if ((u_char *)(ipcomp + 1) >= ep - sizeof(struct ipcomp)) { | |
| 67 | fputs("[|IPCOMP]", stdout); | |
| 68 | goto fail; | |
| 69 | } | |
| 70 | printf("IPComp(cpi=0x%04x)", cpi); | |
| 71 | ||
| 72 | #if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H) | |
| 73 | if (1) | |
| 74 | goto fail; | |
| 75 | ||
| 76 | /* | |
| 77 | * We may want to decompress the packet here. Packet buffer | |
| 78 | * management is a headache (if we decompress, packet will become | |
| 79 | * larger). | |
| 80 | */ | |
| 81 | if (nhdr) | |
| 82 | *nhdr = ipcomp->comp_nxt; | |
| 83 | advance = sizeof(struct ipcomp); | |
| 84 | ||
| 85 | printf(": "); | |
| 86 | return advance; | |
| 87 | ||
| 88 | #endif | |
| 89 | fail: | |
| 90 | return -1; | |
| 91 | } |