/*
* Copyright (c) 1989, 1990, 1991, 1993, 1994
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-ripng.c,v 1.10 2024/09/02 16:15:32 christos Exp $");
#endif

/* \summary: IPv6 Routing Information Protocol (RIPng) printer */

/* specification: RFC 2080 */

#include <config.h>

#include "netdissect-stdinc.h"

#include "netdissect.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 {
       nd_ipv6         rip6_dest;
       nd_uint16_t     rip6_tag;
       nd_uint8_t      rip6_plen;
       nd_uint8_t      rip6_metric;
};

struct  rip6 {
       nd_uint8_t      rip6_cmd;
       nd_uint8_t      rip6_vers;
       nd_byte         rip6_res1[2];
       struct netinfo6 rip6_nets[1];
};

#define HOPCNT_INFINITY6        16

static int ND_IN6_IS_ADDR_UNSPECIFIED(const nd_ipv6 *addr)
{
   static const nd_ipv6 in6addr_any_val = { 0 };        /* :: */
   return (memcmp(addr, &in6addr_any_val, sizeof(*addr)) == 0);
}

static void
rip6_entry_print(netdissect_options *ndo,
                const struct netinfo6 *ni, const u_int print_metric)
{
       uint16_t tag;
       uint8_t metric;

       ND_PRINT("%s/%u", GET_IP6ADDR_STRING(ni->rip6_dest),
                GET_U_1(ni->rip6_plen));
       tag = GET_BE_U_2(ni->rip6_tag);
       if (tag)
               ND_PRINT(" [%u]", tag);
       metric = GET_U_1(ni->rip6_metric);
       if (metric && print_metric)
               ND_PRINT(" (%u)", metric);
}

UNALIGNED_OK
void
ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length)
{
       const struct rip6 *rp = (const struct rip6 *)dat;
       uint8_t cmd, vers;
       const struct netinfo6 *ni;
       unsigned int length_left;
       u_int j;

       ndo->ndo_protocol = "ripng";
       vers = GET_U_1(rp->rip6_vers);
       if (vers != RIP6_VERSION) {
               nd_print_protocol(ndo);
               ND_PRINT(" [version %u, must be %u]", vers, RIP6_VERSION);
               goto invalid;
       }
       cmd = GET_U_1(rp->rip6_cmd);
       switch (cmd) {

       case RIP6_REQUEST:
               length_left = length;
               if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
                       goto invalid;
               length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
               j = length_left / sizeof(*ni);
               if (j == 1) {
                       if (GET_U_1(rp->rip6_nets->rip6_metric) == HOPCNT_INFINITY6
                           && ND_IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
                               ND_PRINT(" ripng-req dump");
                               break;
                       }
               }
               if (j * sizeof(*ni) != length_left)
                       ND_PRINT(" ripng-req %u[%u]:", j, length);
               else
                       ND_PRINT(" ripng-req %u:", j);
               for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
                   length_left -= sizeof(*ni), ++ni) {
                       if (ndo->ndo_vflag > 1)
                               ND_PRINT("\n\t");
                       else
                               ND_PRINT(" ");
                       rip6_entry_print(ndo, ni, FALSE);
               }
               if (length_left != 0)
                       goto invalid;
               break;
       case RIP6_RESPONSE:
               length_left = length;
               if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
                       goto invalid;
               length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
               j = length_left / sizeof(*ni);
               if (j * sizeof(*ni) != length_left)
                       ND_PRINT(" ripng-resp %u[%u]:", j, length);
               else
                       ND_PRINT(" ripng-resp %u:", j);
               for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
                   length_left -= sizeof(*ni), ++ni) {
                       if (ndo->ndo_vflag > 1)
                               ND_PRINT("\n\t");
                       else
                               ND_PRINT(" ");
                       rip6_entry_print(ndo, ni, TRUE);
               }
               if (length_left != 0)
                       goto invalid;
               break;
       default:
               ND_PRINT(" ripng-%u ?? %u", cmd, length);
               goto invalid;
       }
       return;

invalid:
       nd_print_invalid(ndo);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.