/*      $OpenBSD: print-igrp.c,v 1.9 2020/01/24 22:46:36 procter Exp $  */

/*
 * Copyright (c) 1996, 1997
 *      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.
 *
 * Initial contribution from Francis Dupont (francis.dupont@inria.fr)
 */

#include <sys/types.h>                  /* concession to AIX */
#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 "interface.h"
#include "addrtoname.h"
#include "igrp.h"
#include "extract.h"                    /* must come after interface.h */

static void
igrp_entry_print(struct igrprte *igr, int is_interior, int is_exterior)
{
        u_int delay, bandwidth;
        u_int metric, mtu;

        if (is_interior)
                printf(" *.%d.%d.%d", igr->igr_net[0],
                    igr->igr_net[1], igr->igr_net[2]);
        else if (is_exterior)
                printf(" X%d.%d.%d.0", igr->igr_net[0],
                    igr->igr_net[1], igr->igr_net[2]);
        else
                printf(" %d.%d.%d.0", igr->igr_net[0],
                    igr->igr_net[1], igr->igr_net[2]);

        delay = EXTRACT_24BITS(igr->igr_dly);
        bandwidth = EXTRACT_24BITS(igr->igr_bw);
        metric = bandwidth + delay;
        if (metric > 0xffffff)
                metric = 0xffffff;
        mtu = EXTRACT_16BITS(igr->igr_mtu);

        printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
            10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
            igr->igr_rel, igr->igr_ld, metric,
            mtu, igr->igr_hct);
}

static struct tok op2str[] = {
        { IGRP_UPDATE,          "update" },
        { IGRP_REQUEST,         "request" },
        { 0,                    NULL }
};

void
igrp_print(const u_char *bp, u_int length, const u_char *bp2)
{
        struct igrphdr *hdr;
        struct ip *ip;
        u_char *cp;
        u_int nint, nsys, next;

        hdr = (struct igrphdr *)bp;
        ip = (struct ip *)bp2;
        cp = (u_char *)(hdr + 1);
        printf("%s > %s: igrp: ",
            ipaddr_string(&ip->ip_src),
            ipaddr_string(&ip->ip_dst));

        /* Header */
        TCHECK(*hdr);
        nint = EXTRACT_16BITS(&hdr->ig_ni);
        nsys = EXTRACT_16BITS(&hdr->ig_ns);
        next = EXTRACT_16BITS(&hdr->ig_nx);

        printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
            tok2str(op2str, "op-#%d", hdr->ig_op),
            hdr->ig_v,
            hdr->ig_ed,
            EXTRACT_16BITS(&hdr->ig_as),
            nint,
            nsys,
            next);

        length -= sizeof(*hdr);
        while (length >= IGRP_RTE_SIZE) {
                if (nint > 0) {
                        TCHECK2(*cp, IGRP_RTE_SIZE);
                        igrp_entry_print((struct igrprte *)cp, 1, 0);
                        --nint;
                } else if (nsys > 0) {
                        TCHECK2(*cp, IGRP_RTE_SIZE);
                        igrp_entry_print((struct igrprte *)cp, 0, 0);
                        --nsys;
                } else if (next > 0) {
                        TCHECK2(*cp, IGRP_RTE_SIZE);
                        igrp_entry_print((struct igrprte *)cp, 0, 1);
                        --next;
                } else {
                        printf("[extra bytes %d]", length);
                        break;
                }
                cp += IGRP_RTE_SIZE;
                length -= IGRP_RTE_SIZE;
        }
        if (nint == 0 && nsys == 0 && next == 0)
                return;
trunc:
        printf("[|igrp]");
}