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Diffstat (limited to '')
| -rw-r--r-- | print-mobile.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/print-mobile.c b/print-mobile.c new file mode 100644 index 0000000..528da79 --- /dev/null +++ b/print-mobile.c @@ -0,0 +1,104 @@ +/* $NetBSD: print-mobile.c,v 1.2 1998/09/30 08:57:01 hwr Exp $ */ + +/* + * (c) 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Heiko W.Rupp <hwr@pilhuhn.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation 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 BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* \summary: IPv4 mobility printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" + +#define MOBILE_SIZE (8) + +struct mobile_ip { + nd_uint16_t proto; + nd_uint16_t hcheck; + nd_uint32_t odst; + nd_uint32_t osrc; +}; + +#define OSRC_PRES 0x0080 /* old source is present */ + +/* + * Deencapsulate and print a mobile-tunneled IP datagram + */ +void +mobile_print(netdissect_options *ndo, const u_char *bp, u_int length) +{ + const struct mobile_ip *mob; + struct cksum_vec vec[1]; + u_short proto,crc; + u_char osp =0; /* old source address present */ + + ndo->ndo_protocol = "mobile"; + mob = (const struct mobile_ip *)bp; + + if (length < MOBILE_SIZE || !ND_TTEST_SIZE(mob)) { + nd_print_trunc(ndo); + return; + } + ND_PRINT("mobile: "); + + proto = GET_BE_U_2(mob->proto); + crc = GET_BE_U_2(mob->hcheck); + if (proto & OSRC_PRES) { + osp=1; + } + + if (osp) { + ND_PRINT("[S] "); + if (ndo->ndo_vflag) + ND_PRINT("%s ", GET_IPADDR_STRING(mob->osrc)); + } else { + ND_PRINT("[] "); + } + if (ndo->ndo_vflag) { + ND_PRINT("> %s ", GET_IPADDR_STRING(mob->odst)); + ND_PRINT("(oproto=%u)", proto>>8); + } + vec[0].ptr = (const uint8_t *)(const void *)mob; + vec[0].len = osp ? 12 : 8; + if (in_cksum(vec, 1)!=0) { + ND_PRINT(" (bad checksum %u)", crc); + } +} |