The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* $NetBSD: print-mobile.c,v 1.2 1998/09/30 08:57:01 hwr Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * (c) 1998 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Heiko W.Rupp <hwr@pilhuhn.de> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the NetBSD |
| 21 | * Foundation, Inc. and its contributors. |
| 22 | * 4. Neither the name of The NetBSD Foundation nor the names of its |
| 23 | * contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 27 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 30 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 36 | * POSSIBILITY OF SUCH DAMAGE. |
| 37 | */ |
| 38 | |
| 39 | #ifdef HAVE_CONFIG_H |
| 40 | #include "config.h" |
| 41 | #endif |
| 42 | |
| 43 | #ifndef lint |
| 44 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 45 | "@(#) $Header: /tcpdump/master/tcpdump/print-mobile.c,v 1.15 2004-03-24 01:58:14 guy Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 46 | #endif |
| 47 | |
| 48 | #include <tcpdump-stdinc.h> |
| 49 | |
| 50 | #include <stdio.h> |
| 51 | |
| 52 | #include "interface.h" |
| 53 | #include "addrtoname.h" |
| 54 | #include "extract.h" /* must come after interface.h */ |
| 55 | |
| 56 | #define MOBILE_SIZE (8) |
| 57 | |
| 58 | struct mobile_ip { |
| 59 | u_int16_t proto; |
| 60 | u_int16_t hcheck; |
| 61 | u_int32_t odst; |
| 62 | u_int32_t osrc; |
| 63 | }; |
| 64 | |
| 65 | #define OSRC_PRES 0x0080 /* old source is present */ |
| 66 | |
| 67 | /* |
| 68 | * Deencapsulate and print a mobile-tunneled IP datagram |
| 69 | */ |
| 70 | void |
| 71 | mobile_print(const u_char *bp, u_int length) |
| 72 | { |
| 73 | const u_char *cp = bp +8 ; |
| 74 | const struct mobile_ip *mob; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 75 | struct cksum_vec vec[1]; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 76 | u_short proto,crc; |
| 77 | u_char osp =0; /* old source address present */ |
| 78 | |
| 79 | mob = (const struct mobile_ip *)bp; |
| 80 | |
| 81 | if (length < MOBILE_SIZE || !TTEST(*mob)) { |
| 82 | fputs("[|mobile]", stdout); |
| 83 | return; |
| 84 | } |
| 85 | fputs("mobile: ", stdout); |
| 86 | |
| 87 | proto = EXTRACT_16BITS(&mob->proto); |
| 88 | crc = EXTRACT_16BITS(&mob->hcheck); |
| 89 | if (proto & OSRC_PRES) { |
| 90 | osp=1; |
| 91 | cp +=4 ; |
| 92 | } |
| 93 | |
| 94 | if (osp) { |
| 95 | fputs("[S] ",stdout); |
| 96 | if (vflag) |
| 97 | (void)printf("%s ",ipaddr_string(&mob->osrc)); |
| 98 | } else { |
| 99 | fputs("[] ",stdout); |
| 100 | } |
| 101 | if (vflag) { |
| 102 | (void)printf("> %s ",ipaddr_string(&mob->odst)); |
| 103 | (void)printf("(oproto=%d)",proto>>8); |
| 104 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 105 | vec[0].ptr = (const u_int8_t *)(void *)mob; |
| 106 | vec[0].len = osp ? 12 : 8; |
| 107 | if (in_cksum(vec, 1)!=0) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 108 | (void)printf(" (bad checksum %d)",crc); |
| 109 | } |
| 110 | |
| 111 | return; |
| 112 | } |