X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/339f6a65b25d0d3b5d235e19238b75d0afe5dac7..39d15607cad1b4b463794c1a67873f6182dc52f7:/print-ripng.c diff --git a/print-ripng.c b/print-ripng.c index 59d8fede..b50b0814 100644 --- a/print-ripng.c +++ b/print-ripng.c @@ -19,30 +19,82 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.8 2001-05-10 05:30:22 fenner Exp $"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef INET6 -#include -#include -#include -#include - -#include - -#include +#include #include -#include "route6d.h" #include "interface.h" #include "addrtoname.h" +#include "extract.h" + +/* + * Copyright (C) 1995, 1996, 1997 and 1998 WIDE Project. + * All rights reserved. + * + * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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. + */ +#define RIP6_VERSION 1 + +#define RIP6_REQUEST 1 +#define RIP6_RESPONSE 2 + +struct netinfo6 { + struct in6_addr rip6_dest; + u_int16_t rip6_tag; + u_int8_t rip6_plen; + u_int8_t rip6_metric; +}; + +struct rip6 { + u_int8_t rip6_cmd; + u_int8_t rip6_vers; + u_int8_t rip6_res1[2]; + union { + struct netinfo6 ru6_nets[1]; + char ru6_tracefile[1]; + } rip6un; +#define rip6_nets rip6un.ru6_nets +#define rip6_tracefile rip6un.ru6_tracefile +}; + +#define HOPCNT_INFINITY6 16 + +#define RIP6_PORT 521 + +#if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */ +static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr) +{ + static const struct in6_addr in6addr_any; /* :: */ + return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0); +} +#endif static int rip6_entry_print(register const struct netinfo6 *ni, int metric) @@ -50,25 +102,29 @@ rip6_entry_print(register const struct netinfo6 *ni, int metric) int l; l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen); if (ni->rip6_tag) - l += printf(" [%d]", ntohs(ni->rip6_tag)); + l += printf(" [%d]", EXTRACT_16BITS(&ni->rip6_tag)); if (metric) l += printf(" (%d)", ni->rip6_metric); return l; } void -ripng_print(const u_char *dat, int length) +ripng_print(const u_char *dat, unsigned int length) { register const struct rip6 *rp = (struct rip6 *)dat; register const struct netinfo6 *ni; - register int amt = snapend - dat; - register int i = min(length, amt) - - (sizeof(struct rip6) - sizeof(struct netinfo6)); + register u_int amt; + register u_int i; int j; int trunc; - if (i < 0) + if (snapend < dat) + return; + amt = snapend - dat; + i = min(length, amt); + if (i < (sizeof(struct rip6) - sizeof(struct netinfo6))) return; + i -= (sizeof(struct rip6) - sizeof(struct netinfo6)); switch (rp->rip6_cmd) { @@ -81,11 +137,12 @@ ripng_print(const u_char *dat, int length) break; } if (j * sizeof(*ni) != length - 4) - printf(" ripng-req %d[%d]:", j, length); + printf(" ripng-req %d[%u]:", j, length); else printf(" ripng-req %d:", j); trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); - for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) { + for (ni = rp->rip6_nets; i >= sizeof(*ni); + i -= sizeof(*ni), ++ni) { if (vflag > 1) printf("\n\t"); else @@ -96,11 +153,12 @@ ripng_print(const u_char *dat, int length) case RIP6_RESPONSE: j = length / sizeof(*ni); if (j * sizeof(*ni) != length - 4) - printf(" ripng-resp %d[%d]:", j, length); + printf(" ripng-resp %d[%u]:", j, length); else printf(" ripng-resp %d:", j); trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); - for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) { + for (ni = rp->rip6_nets; i >= sizeof(*ni); + i -= sizeof(*ni), ++ni) { if (vflag > 1) printf("\n\t"); else @@ -108,10 +166,10 @@ ripng_print(const u_char *dat, int length) rip6_entry_print(ni, ni->rip6_metric); } if (trunc) - printf("[|rip]"); + printf("[|ripng]"); break; default: - printf(" ripng-%d ?? %d", rp->rip6_cmd, length); + printf(" ripng-%d ?? %u", rp->rip6_cmd, length); break; } if (rp->rip6_vers != RIP6_VERSION)