/*      $OpenBSD: print-ripng.c,v 1.7 2018/10/22 16:12:45 kn Exp $      */

/*
 * 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/time.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>

#include <errno.h>
#include <stdio.h>

#include <netinet/ip6.h>

#include "route6d.h"
#include "interface.h"
#include "addrtoname.h"

static int
rip6_entry_print(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));
        if (metric)
                l += printf(" (%d)", ni->rip6_metric);
        return l;
}

void
ripng_print(const u_char *dat, int length)
{
        const struct rip6 *rp = (struct rip6 *)dat;
        const struct netinfo6 *ni;
        int amt = snapend - dat;
        int i = min(length, amt) -
                         (sizeof(struct rip6) - sizeof(struct netinfo6));
        int j;
        int trunc;

        if (i < 0)
                return;

        switch (rp->rip6_cmd) {

        case RIP6_REQUEST:
                j = length / sizeof(*ni);
                if (j == 1
                    &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
                    &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
                        printf("ripng-req dump");
                        break;
                }
                if (j * sizeof(*ni) != length - 4)
                        printf("ripng-req %d[%d]:", 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) {
                        if (vflag)
                                printf("\n\t");
                        else
                                printf(" ");
                        rip6_entry_print(ni, 0);
                }
                break;
        case RIP6_RESPONSE:
                j = length / sizeof(*ni);
                if (j * sizeof(*ni) != length - 4)
                        printf("ripng-resp %d[%d]:", 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) {
                        if (vflag)
                                printf("\n\t");
                        else
                                printf(" ");
                        rip6_entry_print(ni, ni->rip6_metric);
                }
                if (trunc)
                        printf("[|rip]");
                break;
        default:
                printf("ripng-%d ?? %d", rp->rip6_cmd, length);
                break;
        }
        if (rp->rip6_vers != RIP6_VERSION)
                printf(" [vers %d]", rp->rip6_vers);
}