2 * Copyright (c) 1989 Stephen Deering
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Stephen Deering of Stanford University.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)mroute.c 8.2 (Berkeley) 4/28/95
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
44 * Print multicast routing structures and statistics.
49 #include <sys/param.h>
50 #include <sys/queue.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/sysctl.h>
54 #include <sys/protosw.h>
59 #include <netinet/in.h>
60 #include <netinet/igmp.h>
61 #include <net/route.h>
64 #include <netinet/ip_mroute.h>
75 * kvm(3) bindings for every needed symbol
77 static struct nlist mrl[] = {
79 { .n_name = "_mrtstat" },
80 #define N_MFCHASHTBL 1
81 { .n_name = "_mfchashtbl" },
83 { .n_name = "_viftable" },
84 #define N_MFCTABLESIZE 3
85 { .n_name = "_mfctablesize" },
89 static void print_bw_meter(struct bw_meter *, int *);
90 static void print_mfc(struct mfc *, int, int *);
93 print_bw_meter(struct bw_meter *bw_meter, int *banner_printed)
95 char s0[256], s1[256], s2[256], s3[256];
96 struct timeval now, end, delta;
98 gettimeofday(&now, NULL);
100 if (! *banner_printed) {
101 printf(" Bandwidth Meters\n");
102 printf(" %-30s", "Measured(Start|Packets|Bytes)");
103 printf(" %s", "Type");
104 printf(" %-30s", "Thresh(Interval|Packets|Bytes)");
110 /* The measured values */
111 if (bw_meter->bm_flags & BW_METER_UNIT_PACKETS)
112 sprintf(s1, "%ju", (uintmax_t)bw_meter->bm_measured.b_packets);
115 if (bw_meter->bm_flags & BW_METER_UNIT_BYTES)
116 sprintf(s2, "%ju", (uintmax_t)bw_meter->bm_measured.b_bytes);
119 sprintf(s0, "%lu.%lu|%s|%s",
120 (u_long)bw_meter->bm_start_time.tv_sec,
121 (u_long)bw_meter->bm_start_time.tv_usec,
123 printf(" %-30s", s0);
125 /* The type of entry */
126 sprintf(s0, "%s", "?");
127 if (bw_meter->bm_flags & BW_METER_GEQ)
128 sprintf(s0, "%s", ">=");
129 else if (bw_meter->bm_flags & BW_METER_LEQ)
130 sprintf(s0, "%s", "<=");
133 /* The threshold values */
134 if (bw_meter->bm_flags & BW_METER_UNIT_PACKETS)
135 sprintf(s1, "%ju", (uintmax_t)bw_meter->bm_threshold.b_packets);
138 if (bw_meter->bm_flags & BW_METER_UNIT_BYTES)
139 sprintf(s2, "%ju", (uintmax_t)bw_meter->bm_threshold.b_bytes);
142 sprintf(s0, "%lu.%lu|%s|%s",
143 (u_long)bw_meter->bm_threshold.b_time.tv_sec,
144 (u_long)bw_meter->bm_threshold.b_time.tv_usec,
146 printf(" %-30s", s0);
149 timeradd(&bw_meter->bm_start_time,
150 &bw_meter->bm_threshold.b_time, &end);
151 if (timercmp(&now, &end, <=)) {
152 timersub(&end, &now, &delta);
153 sprintf(s3, "%lu.%lu",
154 (u_long)delta.tv_sec,
155 (u_long)delta.tv_usec);
158 timersub(&now, &end, &delta);
159 sprintf(s3, "-%lu.%lu",
160 (u_long)delta.tv_sec,
161 (u_long)delta.tv_usec);
169 print_mfc(struct mfc *m, int maxvif, int *banner_printed)
171 struct bw_meter bw_meter, *bwm;
172 int bw_banner_printed;
176 bw_banner_printed = 0;
178 if (! *banner_printed) {
179 printf("\nIPv4 Multicast Forwarding Table\n"
181 " Packets In-Vif Out-Vifs:Ttls\n");
185 printf(" %-15.15s", routename(m->mfc_origin.s_addr));
186 printf(" %-15.15s", routename(m->mfc_mcastgrp.s_addr));
187 printf(" %9lu", m->mfc_pkt_cnt);
188 printf(" %3d ", m->mfc_parent);
189 for (vifi = 0; vifi <= maxvif; vifi++) {
190 if (m->mfc_ttls[vifi] > 0)
191 printf(" %u:%u", vifi, m->mfc_ttls[vifi]);
196 * XXX We break the rules and try to use KVM to read the
197 * bandwidth meters, they are not retrievable via sysctl yet.
199 bwm = m->mfc_bw_meter;
200 while (bwm != NULL) {
201 error = kread((u_long)bwm, (char *)&bw_meter,
205 print_bw_meter(&bw_meter, &bw_banner_printed);
206 bwm = bw_meter.bm_mfc_next;
213 struct vif viftable[MAXVIFS];
216 u_long pmfchashtbl, pmfctablesize, pviftbl;
218 int saved_numeric_addr;
222 saved_numeric_addr = numeric_addr;
227 * The VIF table will move to hanging off the struct if_info for
228 * each IPv4 configured interface. Currently it is statically
229 * allocated, and retrieved either using KVM or an opaque SYSCTL.
231 * This can't happen until the API documented in multicast(4)
232 * is itself refactored. The historical reason why VIFs use
233 * a separate ifindex space is entirely due to the legacy
234 * capability of the MROUTING code to create IPIP tunnels on
235 * the fly to support DVMRP. When gif(4) became available, this
236 * functionality was deprecated, as PIM does not use it.
239 pmfchashtbl = pmfctablesize = pviftbl = 0;
241 len = sizeof(viftable);
243 if (sysctlbyname("net.inet.ip.viftable", viftable, &len, NULL,
245 warn("sysctl: net.inet.ip.viftable");
250 pmfchashtbl = mrl[N_MFCHASHTBL].n_value;
251 pmfctablesize = mrl[N_MFCTABLESIZE].n_value;
252 pviftbl = mrl[N_VIFTABLE].n_value;
254 if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
255 fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
259 kread(pviftbl, (char *)viftable, sizeof(viftable));
263 for (vifi = 0, v = viftable; vifi < MAXVIFS; ++vifi, ++v) {
264 if (v->v_lcl_addr.s_addr == 0)
268 if (!banner_printed) {
269 printf("\nIPv4 Virtual Interface Table\n"
270 " Vif Thresh Local-Address "
271 "Remote-Address Pkts-In Pkts-Out\n");
275 printf(" %2u %6u %-15.15s",
276 /* opposite math of add_vif() */
277 vifi, v->v_threshold,
278 routename(v->v_lcl_addr.s_addr));
279 printf(" %-15.15s", (v->v_flags & VIFF_TUNNEL) ?
280 routename(v->v_rmt_addr.s_addr) : "");
282 printf(" %9lu %9lu\n", v->v_pkt_in, v->v_pkt_out);
285 printf("\nIPv4 Virtual Interface Table is empty\n");
291 * The MFC table will move into the AF_INET radix trie in future.
292 * In 8.x, it becomes a dynamically allocated structure referenced
293 * by a hashed LIST, allowing more than 256 entries w/o kernel tuning.
295 * If retrieved via opaque SYSCTL, the kernel will coalesce it into
296 * a static table for us.
297 * If retrieved via KVM, the hash list pointers must be followed.
300 struct mfc *mfctable;
303 if (sysctlbyname("net.inet.ip.mfctable", NULL, &len, NULL,
305 warn("sysctl: net.inet.ip.mfctable");
309 mfctable = malloc(len);
310 if (mfctable == NULL) {
311 warnx("malloc %lu bytes", (u_long)len);
314 if (sysctlbyname("net.inet.ip.mfctable", mfctable, &len, NULL,
317 warn("sysctl: net.inet.ip.mfctable");
322 while (len >= sizeof(*m)) {
323 print_mfc(m++, maxvif, &banner_printed);
327 warnx("print_mfc: %lu trailing bytes", (u_long)len);
331 LIST_HEAD(, mfc) *mfchashtbl;
332 u_long i, mfctablesize;
336 error = kread(pmfctablesize, (char *)&mfctablesize,
339 warn("kread: mfctablesize");
343 len = sizeof(*mfchashtbl) * mfctablesize;
344 mfchashtbl = malloc(len);
345 if (mfchashtbl == NULL) {
346 warnx("malloc %lu bytes", (u_long)len);
349 kread(pmfchashtbl, (char *)&mfchashtbl, len);
351 for (i = 0; i < mfctablesize; i++) {
352 LIST_FOREACH(m, &mfchashtbl[i], mfc_hash) {
353 kread((u_long)m, (char *)&mfc, sizeof(mfc));
354 print_mfc(m, maxvif, &banner_printed);
362 printf("\nIPv4 Multicast Forwarding Table is empty\n");
365 numeric_addr = saved_numeric_addr;
371 struct mrtstat mrtstat;
373 size_t len = sizeof(mrtstat);
376 mstaddr = mrl[N_MRTSTAT].n_value;
379 fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
384 if (sysctlbyname("net.inet.ip.mrtstat", &mrtstat, &len, NULL,
386 warn("sysctl: net.inet.ip.mrtstat failed.");
390 kread_counters(mstaddr, &mrtstat, len);
392 printf("IPv4 multicast forwarding:\n");
394 #define p(f, m) if (mrtstat.f || sflag <= 1) \
395 printf(m, (uintmax_t)mrtstat.f, plural(mrtstat.f))
396 #define p2(f, m) if (mrtstat.f || sflag <= 1) \
397 printf(m, (uintmax_t)mrtstat.f, plurales(mrtstat.f))
399 p(mrts_mfc_lookups, "\t%ju multicast forwarding cache lookup%s\n");
400 p2(mrts_mfc_misses, "\t%ju multicast forwarding cache miss%s\n");
401 p(mrts_upcalls, "\t%ju upcall%s to multicast routing daemon\n");
402 p(mrts_upq_ovflw, "\t%ju upcall queue overflow%s\n");
404 "\t%ju upcall%s dropped due to full socket buffer\n");
405 p(mrts_cache_cleanups, "\t%ju cache cleanup%s\n");
406 p(mrts_no_route, "\t%ju datagram%s with no route for origin\n");
407 p(mrts_bad_tunnel, "\t%ju datagram%s arrived with bad tunneling\n");
408 p(mrts_cant_tunnel, "\t%ju datagram%s could not be tunneled\n");
409 p(mrts_wrong_if, "\t%ju datagram%s arrived on wrong interface\n");
410 p(mrts_drop_sel, "\t%ju datagram%s selectively dropped\n");
411 p(mrts_q_overflow, "\t%ju datagram%s dropped due to queue overflow\n");
412 p(mrts_pkt2large, "\t%ju datagram%s dropped for being too large\n");