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/* $OpenBSD: mroute.c,v 1.26 2019/09/02 12:48:44 bluhm Exp $ */
/* $NetBSD: mroute.c,v 1.10 1996/05/11 13:51:27 mycroft Exp $ */
/*
* Copyright (c) 1989 Stephen Deering
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Stephen Deering of Stanford University.
*
* 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 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 BY THE REGENTS 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 REGENTS 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.
*
* from: @(#)mroute.c 8.1 (Berkeley) 6/6/93
*/
/*
* Print multicast routing structures and statistics.
*
* MROUTING 1.0
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <netinet/in.h>
#include <netinet/igmp.h>
#include <netinet/ip_mroute.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <util.h>
#include "netstat.h"
void
mroutepr(void)
{
u_int mrtproto;
struct vifinfo *v;
struct mfcinfo *m;
size_t needed, numvifs, nummfcs, vifi, mfci;
char *buf = NULL;
char fmtbuf[FMT_SCALED_STRSIZE];
vifi_t maxvif = 0;
int mib[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTPROTO };
size_t len = sizeof(int);
int banner_printed = 0, saved_nflag;
if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
&mrtproto, &len, NULL, 0) == -1) {
if (errno != ENOPROTOOPT)
warn("mroute");
return;
}
switch (mrtproto) {
case 0:
printf("no multicast routing compiled into this system\n");
return;
case IGMP_DVMRP:
break;
default:
printf("multicast routing protocol %u, unknown\n", mrtproto);
return;
}
saved_nflag = nflag;
nflag = 1;
mib[3] = IPCTL_MRTVIF;
needed = get_sysctl(mib, sizeof(mib) / sizeof(mib[0]), &buf);
numvifs = needed / sizeof(*v);
v = (struct vifinfo *)buf;
if (numvifs)
maxvif = v[numvifs - 1].v_vifi;
for (vifi = 0; vifi < numvifs; ++vifi, ++v) {
if (!banner_printed) {
printf("\nVirtual Interface Table\n %s%s",
"Vif Thresh Local-Address ",
"Remote-Address Pkt_in Pkt_out\n");
banner_printed = 1;
}
printf(" %3u %3u %-15.15s",
v->v_vifi, v->v_threshold,
routename4(v->v_lcl_addr.s_addr));
printf(" %-15.15s %6lu %7lu\n", (v->v_flags & VIFF_TUNNEL) ?
routename4(v->v_rmt_addr.s_addr) : "",
v->v_pkt_in, v->v_pkt_out);
}
if (!banner_printed)
printf("Virtual Interface Table is empty\n");
banner_printed = 0;
mib[3] = IPCTL_MRTMFC;
needed = get_sysctl(mib, sizeof(mib) / sizeof(mib[0]), &buf);
nummfcs = needed / sizeof(*m);
m = (struct mfcinfo *)buf;
for (mfci = 0; mfci < nummfcs; ++mfci, ++m) {
if (!banner_printed) {
printf("\nMulticast Forwarding Cache\n %s%s",
"Hash Origin Mcastgroup ",
"Traffic In-Vif Out-Vifs/Forw-ttl\n");
banner_printed = 1;
}
printf(" %3zu %-15.15s",
mfci, routename4(m->mfc_origin.s_addr));
fmt_scaled(m->mfc_pkt_cnt, fmtbuf);
printf(" %-15.15s %7s %3u ",
routename4(m->mfc_mcastgrp.s_addr),
fmtbuf, m->mfc_parent);
for (vifi = 0; vifi <= maxvif; ++vifi)
if (m->mfc_ttls[vifi])
printf(" %zu/%u", vifi, m->mfc_ttls[vifi]);
printf("\n");
}
if (!banner_printed)
printf("Multicast Forwarding Cache is empty\n");
else
printf("\nTotal no. of entries in cache: %zu\n", nummfcs);
printf("\n");
nflag = saved_nflag;
free(buf);
}
void
mrt_stats(void)
{
u_int mrtproto;
struct mrtstat mrtstat;
int mib[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTPROTO };
int mib2[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTSTATS };
size_t len = sizeof(int);
if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
&mrtproto, &len, NULL, 0) == -1) {
if (errno != ENOPROTOOPT)
warn("mroute");
return;
}
switch (mrtproto) {
case 0:
printf("no multicast routing compiled into this system\n");
return;
case IGMP_DVMRP:
break;
default:
printf("multicast routing protocol %u, unknown\n", mrtproto);
return;
}
len = sizeof(mrtstat);
if (sysctl(mib2, sizeof(mib2) / sizeof(mib2[0]),
&mrtstat, &len, NULL, 0) == -1) {
if (errno != ENOPROTOOPT)
warn("mroute");
return;
}
printf("multicast routing:\n");
printf("\t%lu datagram%s with no route for origin\n",
mrtstat.mrts_no_route, plural(mrtstat.mrts_no_route));
printf("\t%lu upcall%s made to mrouted\n",
mrtstat.mrts_upcalls, plural(mrtstat.mrts_upcalls));
printf("\t%lu datagram%s with malformed tunnel options\n",
mrtstat.mrts_bad_tunnel, plural(mrtstat.mrts_bad_tunnel));
printf("\t%lu datagram%s with no room for tunnel options\n",
mrtstat.mrts_cant_tunnel, plural(mrtstat.mrts_cant_tunnel));
printf("\t%lu datagram%s arrived on wrong interface\n",
mrtstat.mrts_wrong_if, plural(mrtstat.mrts_wrong_if));
printf("\t%lu datagram%s dropped due to upcall Q overflow\n",
mrtstat.mrts_upq_ovflw, plural(mrtstat.mrts_upq_ovflw));
printf("\t%lu datagram%s dropped due to upcall socket overflow\n",
mrtstat.mrts_upq_sockfull, plural(mrtstat.mrts_upq_sockfull));
printf("\t%lu datagram%s cleaned up by the cache\n",
mrtstat.mrts_cache_cleanups, plural(mrtstat.mrts_cache_cleanups));
printf("\t%lu datagram%s dropped selectively by ratelimiter\n",
mrtstat.mrts_drop_sel, plural(mrtstat.mrts_drop_sel));
printf("\t%lu datagram%s dropped - bucket Q overflow\n",
mrtstat.mrts_q_overflow, plural(mrtstat.mrts_q_overflow));
printf("\t%lu datagram%s dropped - larger than bkt size\n",
mrtstat.mrts_pkt2large, plural(mrtstat.mrts_pkt2large));
}
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