465 lines
13 KiB
C
465 lines
13 KiB
C
/*-
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* Copyright (c) 1989 Stephen Deering
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mroute.c 8.2 (Berkeley) 4/28/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Print multicast routing structures and statistics.
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*
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* MROUTING 1.0
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/protosw.h>
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#include <sys/mbuf.h>
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#include <sys/time.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/igmp.h>
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#include <net/route.h>
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#define _KERNEL 1
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#include <netinet/ip_mroute.h>
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#undef _KERNEL
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#include <err.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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#include <libxo/xo.h>
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#include "netstat.h"
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#include "nl_defs.h"
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static void print_bw_meter(struct bw_meter *, int *);
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static void print_mfc(struct mfc *, int, int *);
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static void
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print_bw_meter(struct bw_meter *bw_meter, int *banner_printed)
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{
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char s1[256], s2[256], s3[256];
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struct timeval now, end, delta;
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gettimeofday(&now, NULL);
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if (! *banner_printed) {
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xo_open_list("bandwidth-meter");
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xo_emit(" {T:Bandwidth Meters}\n");
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xo_emit(" {T:/%-30s}", "Measured(Start|Packets|Bytes)");
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xo_emit(" {T:/%s}", "Type");
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xo_emit(" {T:/%-30s}", "Thresh(Interval|Packets|Bytes)");
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xo_emit(" {T:Remain}");
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xo_emit("\n");
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*banner_printed = 1;
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}
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xo_open_instance("bandwidth-meter");
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/* The measured values */
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if (bw_meter->bm_flags & BW_METER_UNIT_PACKETS) {
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sprintf(s1, "%ju", (uintmax_t)bw_meter->bm_measured.b_packets);
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xo_emit("{e:measured-packets/%ju}",
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(uintmax_t)bw_meter->bm_measured.b_packets);
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} else
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sprintf(s1, "?");
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if (bw_meter->bm_flags & BW_METER_UNIT_BYTES) {
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sprintf(s2, "%ju", (uintmax_t)bw_meter->bm_measured.b_bytes);
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xo_emit("{e:measured-bytes/%ju}",
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(uintmax_t)bw_meter->bm_measured.b_bytes);
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} else
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sprintf(s2, "?");
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xo_emit(" {[:-30}{:start-time/%lu.%06lu}|{q:measured-packets/%s}"
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"|{q:measured-bytes%s}{]:}",
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(u_long)bw_meter->bm_start_time.tv_sec,
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(u_long)bw_meter->bm_start_time.tv_usec, s1, s2);
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/* The type of entry */
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xo_emit(" {t:type/%-3s}", (bw_meter->bm_flags & BW_METER_GEQ) ? ">=" :
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(bw_meter->bm_flags & BW_METER_LEQ) ? "<=" : "?");
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/* The threshold values */
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if (bw_meter->bm_flags & BW_METER_UNIT_PACKETS) {
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sprintf(s1, "%ju", (uintmax_t)bw_meter->bm_threshold.b_packets);
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xo_emit("{e:threshold-packets/%ju}",
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(uintmax_t)bw_meter->bm_threshold.b_packets);
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} else
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sprintf(s1, "?");
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if (bw_meter->bm_flags & BW_METER_UNIT_BYTES) {
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sprintf(s2, "%ju", (uintmax_t)bw_meter->bm_threshold.b_bytes);
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xo_emit("{e:threshold-bytes/%ju}",
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(uintmax_t)bw_meter->bm_threshold.b_bytes);
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} else
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sprintf(s2, "?");
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xo_emit(" {[:-30}{:threshold-time/%lu.%06lu}|{q:threshold-packets/%s}"
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"|{q:threshold-bytes%s}{]:}",
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(u_long)bw_meter->bm_threshold.b_time.tv_sec,
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(u_long)bw_meter->bm_threshold.b_time.tv_usec, s1, s2);
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/* Remaining time */
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timeradd(&bw_meter->bm_start_time,
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&bw_meter->bm_threshold.b_time, &end);
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if (timercmp(&now, &end, <=)) {
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timersub(&end, &now, &delta);
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sprintf(s3, "%lu.%06lu",
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(u_long)delta.tv_sec,
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(u_long)delta.tv_usec);
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} else {
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/* Negative time */
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timersub(&now, &end, &delta);
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sprintf(s3, "-%lu.06%lu",
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(u_long)delta.tv_sec,
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(u_long)delta.tv_usec);
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}
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xo_emit(" {:remaining-time/%s}", s3);
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xo_open_instance("bandwidth-meter");
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xo_emit("\n");
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}
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static void
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print_mfc(struct mfc *m, int maxvif, int *banner_printed)
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{
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struct sockaddr_in sin;
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struct sockaddr *sa = (struct sockaddr *)&sin;
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struct bw_meter bw_meter, *bwm;
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int bw_banner_printed;
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int error;
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vifi_t vifi;
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bw_banner_printed = 0;
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memset(&sin, 0, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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if (! *banner_printed) {
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xo_open_list("multicast-forwarding-entry");
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xo_emit("\n{T:IPv4 Multicast Forwarding Table}\n"
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" {T:Origin} {T:Group} "
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" {T:Packets In-Vif} {T:Out-Vifs:Ttls}\n");
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*banner_printed = 1;
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}
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memcpy(&sin.sin_addr, &m->mfc_origin, sizeof(sin.sin_addr));
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xo_emit(" {:origin-address/%-15.15s}", routename(sa, numeric_addr));
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memcpy(&sin.sin_addr, &m->mfc_mcastgrp, sizeof(sin.sin_addr));
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xo_emit(" {:group-address/%-15.15s}",
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routename(sa, numeric_addr));
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xo_emit(" {:sent-packets/%9lu}", m->mfc_pkt_cnt);
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xo_emit(" {:parent/%3d} ", m->mfc_parent);
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xo_open_list("vif-ttl");
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for (vifi = 0; vifi <= maxvif; vifi++) {
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if (m->mfc_ttls[vifi] > 0) {
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xo_open_instance("vif-ttl");
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xo_emit(" {k:vif/%u}:{:ttl/%u}", vifi,
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m->mfc_ttls[vifi]);
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xo_close_instance("vif-ttl");
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}
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}
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xo_close_list("vif-ttl");
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xo_emit("\n");
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/*
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* XXX We break the rules and try to use KVM to read the
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* bandwidth meters, they are not retrievable via sysctl yet.
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*/
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bwm = m->mfc_bw_meter;
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while (bwm != NULL) {
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error = kread((u_long)bwm, (char *)&bw_meter,
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sizeof(bw_meter));
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if (error)
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break;
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print_bw_meter(&bw_meter, &bw_banner_printed);
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bwm = bw_meter.bm_mfc_next;
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}
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if (banner_printed)
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xo_close_list("bandwidth-meter");
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}
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void
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mroutepr()
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{
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struct sockaddr_in sin;
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struct sockaddr *sa = (struct sockaddr *)&sin;
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struct vif viftable[MAXVIFS];
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struct vif *v;
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struct mfc *m;
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#ifndef FSTACK
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u_long pmfchashtbl, pmfctablesize, pviftbl;
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#endif
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int banner_printed;
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int saved_numeric_addr;
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size_t len;
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vifi_t vifi, maxvif;
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saved_numeric_addr = numeric_addr;
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numeric_addr = 1;
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memset(&sin, 0, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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/*
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* TODO:
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* The VIF table will move to hanging off the struct if_info for
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* each IPv4 configured interface. Currently it is statically
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* allocated, and retrieved either using KVM or an opaque SYSCTL.
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*
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* This can't happen until the API documented in multicast(4)
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* is itself refactored. The historical reason why VIFs use
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* a separate ifindex space is entirely due to the legacy
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* capability of the MROUTING code to create IPIP tunnels on
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* the fly to support DVMRP. When gif(4) became available, this
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* functionality was deprecated, as PIM does not use it.
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*/
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maxvif = 0;
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#ifndef FSTACK
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pmfchashtbl = pmfctablesize = pviftbl = 0;
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#endif
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len = sizeof(viftable);
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if (live) {
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if (sysctlbyname("net.inet.ip.viftable", viftable, &len, NULL,
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0) < 0) {
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xo_warn("sysctl: net.inet.ip.viftable");
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return;
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}
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} else {
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#ifndef FSTACK
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pmfchashtbl = nl[N_MFCHASHTBL].n_value;
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pmfctablesize = nl[N_MFCTABLESIZE].n_value;
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pviftbl = nl[N_VIFTABLE].n_value;
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if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
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xo_warnx("No IPv4 MROUTING kernel support.");
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return;
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}
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kread(pviftbl, (char *)viftable, sizeof(viftable));
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#endif
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}
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banner_printed = 0;
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for (vifi = 0, v = viftable; vifi < MAXVIFS; ++vifi, ++v) {
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if (v->v_lcl_addr.s_addr == 0)
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continue;
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maxvif = vifi;
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if (!banner_printed) {
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xo_emit("\n{T:IPv4 Virtual Interface Table\n"
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" Vif Thresh Local-Address "
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"Remote-Address Pkts-In Pkts-Out}\n");
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banner_printed = 1;
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xo_open_list("vif");
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}
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xo_open_instance("vif");
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memcpy(&sin.sin_addr, &v->v_lcl_addr, sizeof(sin.sin_addr));
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xo_emit(" {:vif/%2u} {:threshold/%6u} {:route/%-15.15s}",
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/* opposite math of add_vif() */
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vifi, v->v_threshold,
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routename(sa, numeric_addr));
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memcpy(&sin.sin_addr, &v->v_rmt_addr, sizeof(sin.sin_addr));
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xo_emit(" {:source/%-15.15s}", (v->v_flags & VIFF_TUNNEL) ?
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routename(sa, numeric_addr) : "");
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xo_emit(" {:received-packets/%9lu} {:sent-packets/%9lu}\n",
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v->v_pkt_in, v->v_pkt_out);
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xo_close_instance("vif");
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}
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if (banner_printed)
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xo_close_list("vif");
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else
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xo_emit("\n{T:IPv4 Virtual Interface Table is empty}\n");
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banner_printed = 0;
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/*
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* TODO:
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* The MFC table will move into the AF_INET radix trie in future.
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* In 8.x, it becomes a dynamically allocated structure referenced
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* by a hashed LIST, allowing more than 256 entries w/o kernel tuning.
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*
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* If retrieved via opaque SYSCTL, the kernel will coalesce it into
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* a static table for us.
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* If retrieved via KVM, the hash list pointers must be followed.
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*/
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if (live) {
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struct mfc *mfctable;
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len = 0;
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if (sysctlbyname("net.inet.ip.mfctable", NULL, &len, NULL,
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0) < 0) {
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xo_warn("sysctl: net.inet.ip.mfctable");
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return;
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}
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mfctable = malloc(len);
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if (mfctable == NULL) {
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xo_warnx("malloc %lu bytes", (u_long)len);
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return;
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}
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if (sysctlbyname("net.inet.ip.mfctable", mfctable, &len, NULL,
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0) < 0) {
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free(mfctable);
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xo_warn("sysctl: net.inet.ip.mfctable");
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return;
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}
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m = mfctable;
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while (len >= sizeof(*m)) {
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print_mfc(m++, maxvif, &banner_printed);
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len -= sizeof(*m);
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}
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if (banner_printed)
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xo_close_list("multicast-forwarding-entry");
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if (len != 0)
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xo_warnx("print_mfc: %lu trailing bytes", (u_long)len);
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free(mfctable);
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} else {
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#ifndef FSTACK
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LIST_HEAD(, mfc) *mfchashtbl;
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u_long i, mfctablesize;
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struct mfc mfc;
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int error;
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error = kread(pmfctablesize, (char *)&mfctablesize,
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sizeof(u_long));
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if (error) {
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xo_warn("kread: mfctablesize");
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return;
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}
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len = sizeof(*mfchashtbl) * mfctablesize;
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mfchashtbl = malloc(len);
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if (mfchashtbl == NULL) {
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xo_warnx("malloc %lu bytes", (u_long)len);
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return;
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}
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kread(pmfchashtbl, (char *)&mfchashtbl, len);
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for (i = 0; i < mfctablesize; i++) {
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LIST_FOREACH(m, &mfchashtbl[i], mfc_hash) {
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kread((u_long)m, (char *)&mfc, sizeof(mfc));
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print_mfc(m, maxvif, &banner_printed);
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}
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}
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if (banner_printed)
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xo_close_list("multicast-forwarding-entry");
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free(mfchashtbl);
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#endif
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}
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if (!banner_printed)
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xo_emit("\n{T:IPv4 Multicast Forwarding Table is empty}\n");
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xo_emit("\n");
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numeric_addr = saved_numeric_addr;
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}
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void
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mrt_stats()
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{
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struct mrtstat mrtstat;
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u_long mstaddr;
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mstaddr = nl[N_MRTSTAT].n_value;
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#ifndef FSTACK
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if (mstaddr == 0) {
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fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
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return;
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}
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#endif
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if (fetch_stats("net.inet.ip.mrtstat", mstaddr, &mrtstat,
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sizeof(mrtstat), kread_counters) != 0)
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return;
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xo_emit("{T:IPv4 multicast forwarding}:\n");
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#define p(f, m) if (mrtstat.f || sflag <= 1) \
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xo_emit(m, (uintmax_t)mrtstat.f, plural(mrtstat.f))
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#define p2(f, m) if (mrtstat.f || sflag <= 1) \
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xo_emit(m, (uintmax_t)mrtstat.f, plurales(mrtstat.f))
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xo_open_container("multicast-statistics");
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p(mrts_mfc_lookups, "\t{:cache-lookups/%ju} "
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"{N:/multicast forwarding cache lookup%s}\n");
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p2(mrts_mfc_misses, "\t{:cache-misses/%ju} "
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"{N:/multicast forwarding cache miss%s}\n");
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p(mrts_upcalls, "\t{:upcalls-total/%ju} "
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"{N:/upcall%s to multicast routing daemon}\n");
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p(mrts_upq_ovflw, "\t{:upcall-overflows/%ju} "
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"{N:/upcall queue overflow%s}\n");
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p(mrts_upq_sockfull,
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"\t{:upcalls-dropped-full-buffer/%ju} "
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"{N:/upcall%s dropped due to full socket buffer}\n");
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p(mrts_cache_cleanups, "\t{:cache-cleanups/%ju} "
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"{N:/cache cleanup%s}\n");
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p(mrts_no_route, "\t{:dropped-no-origin/%ju} "
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"{N:/datagram%s with no route for origin}\n");
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p(mrts_bad_tunnel, "\t{:dropped-bad-tunnel/%ju} "
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"{N:/datagram%s arrived with bad tunneling}\n");
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p(mrts_cant_tunnel, "\t{:dropped-could-not-tunnel/%ju} "
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"{N:/datagram%s could not be tunneled}\n");
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p(mrts_wrong_if, "\t{:dropped-wrong-incoming-interface/%ju} "
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"{N:/datagram%s arrived on wrong interface}\n");
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p(mrts_drop_sel, "\t{:dropped-selectively/%ju} "
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"{N:/datagram%s selectively dropped}\n");
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|
p(mrts_q_overflow, "\t{:dropped-queue-overflow/%ju} "
|
|
"{N:/datagram%s dropped due to queue overflow}\n");
|
|
p(mrts_pkt2large, "\t{:dropped-too-large/%ju} "
|
|
"{N:/datagram%s dropped for being too large}\n");
|
|
|
|
#undef p2
|
|
#undef p
|
|
}
|