| | 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 | } |
projects / dragonfly.git / blame_incremental