1 /* $OpenBSD: mroute.c,v 1.26 2019/09/02 12:48:44 bluhm Exp $ */ 2 /* $NetBSD: mroute.c,v 1.10 1996/05/11 13:51:27 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1989 Stephen Deering 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Stephen Deering of Stanford University. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)mroute.c 8.1 (Berkeley) 6/6/93 37 */ 38 39 /* 40 * Print multicast routing structures and statistics. 41 * 42 * MROUTING 1.0 43 */ 44 45 #include <sys/types.h> 46 #include <sys/socket.h> 47 #include <sys/sysctl.h> 48 49 #include <netinet/in.h> 50 #include <netinet/igmp.h> 51 #include <netinet/ip_mroute.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <limits.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <util.h> 59 #include "netstat.h" 60 61 void 62 mroutepr(void) 63 { 64 u_int mrtproto; 65 struct vifinfo *v; 66 struct mfcinfo *m; 67 size_t needed, numvifs, nummfcs, vifi, mfci; 68 char *buf = NULL; 69 char fmtbuf[FMT_SCALED_STRSIZE]; 70 vifi_t maxvif = 0; 71 int mib[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTPROTO }; 72 size_t len = sizeof(int); 73 int banner_printed = 0, saved_nflag; 74 75 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), 76 &mrtproto, &len, NULL, 0) == -1) { 77 if (errno != ENOPROTOOPT) 78 warn("mroute"); 79 return; 80 } 81 switch (mrtproto) { 82 case 0: 83 printf("no multicast routing compiled into this system\n"); 84 return; 85 case IGMP_DVMRP: 86 break; 87 default: 88 printf("multicast routing protocol %u, unknown\n", mrtproto); 89 return; 90 } 91 92 saved_nflag = nflag; 93 nflag = 1; 94 95 mib[3] = IPCTL_MRTVIF; 96 needed = get_sysctl(mib, sizeof(mib) / sizeof(mib[0]), &buf); 97 numvifs = needed / sizeof(*v); 98 v = (struct vifinfo *)buf; 99 if (numvifs) 100 maxvif = v[numvifs - 1].v_vifi; 101 102 for (vifi = 0; vifi < numvifs; ++vifi, ++v) { 103 if (!banner_printed) { 104 printf("\nVirtual Interface Table\n %s%s", 105 "Vif Thresh Local-Address ", 106 "Remote-Address Pkt_in Pkt_out\n"); 107 banner_printed = 1; 108 } 109 110 printf(" %3u %3u %-15.15s", 111 v->v_vifi, v->v_threshold, 112 routename4(v->v_lcl_addr.s_addr)); 113 printf(" %-15.15s %6lu %7lu\n", (v->v_flags & VIFF_TUNNEL) ? 114 routename4(v->v_rmt_addr.s_addr) : "", 115 v->v_pkt_in, v->v_pkt_out); 116 } 117 if (!banner_printed) 118 printf("Virtual Interface Table is empty\n"); 119 120 banner_printed = 0; 121 122 mib[3] = IPCTL_MRTMFC; 123 needed = get_sysctl(mib, sizeof(mib) / sizeof(mib[0]), &buf); 124 nummfcs = needed / sizeof(*m); 125 m = (struct mfcinfo *)buf; 126 127 for (mfci = 0; mfci < nummfcs; ++mfci, ++m) { 128 if (!banner_printed) { 129 printf("\nMulticast Forwarding Cache\n %s%s", 130 "Hash Origin Mcastgroup ", 131 "Traffic In-Vif Out-Vifs/Forw-ttl\n"); 132 banner_printed = 1; 133 } 134 135 printf(" %3zu %-15.15s", 136 mfci, routename4(m->mfc_origin.s_addr)); 137 fmt_scaled(m->mfc_pkt_cnt, fmtbuf); 138 printf(" %-15.15s %7s %3u ", 139 routename4(m->mfc_mcastgrp.s_addr), 140 fmtbuf, m->mfc_parent); 141 for (vifi = 0; vifi <= maxvif; ++vifi) 142 if (m->mfc_ttls[vifi]) 143 printf(" %zu/%u", vifi, m->mfc_ttls[vifi]); 144 145 printf("\n"); 146 } 147 if (!banner_printed) 148 printf("Multicast Forwarding Cache is empty\n"); 149 else 150 printf("\nTotal no. of entries in cache: %zu\n", nummfcs); 151 152 printf("\n"); 153 nflag = saved_nflag; 154 155 free(buf); 156 } 157 158 void 159 mrt_stats(void) 160 { 161 u_int mrtproto; 162 struct mrtstat mrtstat; 163 int mib[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTPROTO }; 164 int mib2[] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_MRTSTATS }; 165 size_t len = sizeof(int); 166 167 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), 168 &mrtproto, &len, NULL, 0) == -1) { 169 if (errno != ENOPROTOOPT) 170 warn("mroute"); 171 return; 172 } 173 switch (mrtproto) { 174 case 0: 175 printf("no multicast routing compiled into this system\n"); 176 return; 177 178 case IGMP_DVMRP: 179 break; 180 181 default: 182 printf("multicast routing protocol %u, unknown\n", mrtproto); 183 return; 184 } 185 186 len = sizeof(mrtstat); 187 if (sysctl(mib2, sizeof(mib2) / sizeof(mib2[0]), 188 &mrtstat, &len, NULL, 0) == -1) { 189 if (errno != ENOPROTOOPT) 190 warn("mroute"); 191 return; 192 } 193 194 printf("multicast routing:\n"); 195 printf("\t%lu datagram%s with no route for origin\n", 196 mrtstat.mrts_no_route, plural(mrtstat.mrts_no_route)); 197 printf("\t%lu upcall%s made to mrouted\n", 198 mrtstat.mrts_upcalls, plural(mrtstat.mrts_upcalls)); 199 printf("\t%lu datagram%s with malformed tunnel options\n", 200 mrtstat.mrts_bad_tunnel, plural(mrtstat.mrts_bad_tunnel)); 201 printf("\t%lu datagram%s with no room for tunnel options\n", 202 mrtstat.mrts_cant_tunnel, plural(mrtstat.mrts_cant_tunnel)); 203 printf("\t%lu datagram%s arrived on wrong interface\n", 204 mrtstat.mrts_wrong_if, plural(mrtstat.mrts_wrong_if)); 205 printf("\t%lu datagram%s dropped due to upcall Q overflow\n", 206 mrtstat.mrts_upq_ovflw, plural(mrtstat.mrts_upq_ovflw)); 207 printf("\t%lu datagram%s dropped due to upcall socket overflow\n", 208 mrtstat.mrts_upq_sockfull, plural(mrtstat.mrts_upq_sockfull)); 209 printf("\t%lu datagram%s cleaned up by the cache\n", 210 mrtstat.mrts_cache_cleanups, plural(mrtstat.mrts_cache_cleanups)); 211 printf("\t%lu datagram%s dropped selectively by ratelimiter\n", 212 mrtstat.mrts_drop_sel, plural(mrtstat.mrts_drop_sel)); 213 printf("\t%lu datagram%s dropped - bucket Q overflow\n", 214 mrtstat.mrts_q_overflow, plural(mrtstat.mrts_q_overflow)); 215 printf("\t%lu datagram%s dropped - larger than bkt size\n", 216 mrtstat.mrts_pkt2large, plural(mrtstat.mrts_pkt2large)); 217 } 218