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source: rtems-libbsd/freebsd/usr.bin/netstat/if.c @ 3d1e767

55-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since 3d1e767 was 3d1e767, checked in by Sebastian Huber <sebastian.huber@…>, on 04/27/16 at 08:25:22
Directly use <sys/types.h> provided by Newlib
Property mode set to `100644`
File size: 19.1 KB

Rev	Line
[d48955b]	1	#include <machine/rtems-bsd-user-space.h>
	2
[f1710b6]	3	/*-
	4	* Copyright (c) 1983, 1988, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 4. Neither the name of the University nor the names of its contributors
	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
	32	#if 0
	33	#ifndef lint
	34	static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
	35	#endif /* not lint */
	36	#endif
	37
[a400e1d]	38	#ifdef __rtems__
	39	#include <machine/rtems-bsd-program.h>
	40	#endif /* __rtems__ */
[f1710b6]	41	#include <sys/cdefs.h>
	42	__FBSDID("$FreeBSD$");
	43
[3d1e767]	44	#include <sys/types.h>
[f1710b6]	45	#include <sys/protosw.h>
	46	#include <sys/socket.h>
	47	#include <sys/socketvar.h>
	48	#include <sys/sysctl.h>
[2017a6d]	49	#include <sys/time.h>
[f1710b6]	50
	51	#include <net/if.h>
	52	#include <net/if_var.h>
	53	#include <net/if_dl.h>
	54	#include <net/if_types.h>
	55	#include <net/ethernet.h>
	56	#include <net/pfvar.h>
	57	#include <net/if_pfsync.h>
	58	#include <netinet/in.h>
	59	#include <netinet/in_var.h>
[e599318]	60	#ifndef __rtems__
[f1710b6]	61	#include <netipx/ipx.h>
	62	#include <netipx/ipx_if.h>
[e599318]	63	#endif /* __rtems__ */
[f1710b6]	64	#include <arpa/inet.h>
	65
	66	#include <err.h>
	67	#include <errno.h>
	68	#include <libutil.h>
[af5333e]	69	#ifdef INET6
	70	#include <netdb.h>
	71	#endif
[f1710b6]	72	#include <signal.h>
	73	#include <stdint.h>
	74	#include <stdio.h>
	75	#include <stdlib.h>
	76	#include <string.h>
	77	#include <unistd.h>
	78
	79	#include "netstat.h"
	80
	81	#define YES 1
	82	#define NO 0
	83
	84	static void sidewaysintpr(int, u_long);
	85	static void catchalarm(int);
	86
	87	#ifdef INET6
[af5333e]	88	static char addr_buf[NI_MAXHOST]; /* for getnameinfo() */
[f1710b6]	89	#endif
	90
	91	/*
	92	* Dump pfsync statistics structure.
	93	*/
	94	void
	95	pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
	96	{
	97	struct pfsyncstats pfsyncstat, zerostat;
	98	size_t len = sizeof(struct pfsyncstats);
	99
	100	if (live) {
	101	if (zflag)
	102	memset(&zerostat, 0, len);
	103	if (sysctlbyname("net.inet.pfsync.stats", &pfsyncstat, &len,
	104	zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
	105	if (errno != ENOENT)
	106	warn("sysctl: net.inet.pfsync.stats");
	107	return;
	108	}
	109	} else
	110	kread(off, &pfsyncstat, len);
	111
	112	printf("%s:\n", name);
	113
	114	#define p(f, m) if (pfsyncstat.f \|\| sflag <= 1) \
	115	printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
	116	#define p2(f, m) if (pfsyncstat.f \|\| sflag <= 1) \
	117	printf(m, (uintmax_t)pfsyncstat.f)
	118
	119	p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
	120	p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
	121	p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
	122	p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
	123	p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
	124	p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
	125	p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
	126	p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
	127	p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
	128	p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
	129	p(pfsyncs_stale, "\t\t%ju stale state%s\n");
	130	p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
	131	p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
	132	p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
	133	p2(pfsyncs_onomem, "\t\t%ju send failed due to mbuf memory error\n");
	134	p2(pfsyncs_oerrors, "\t\t%ju send error\n");
	135	#undef p
	136	#undef p2
	137	}
	138
	139	/*
	140	* Display a formatted value, or a '-' in the same space.
	141	*/
	142	static void
	143	show_stat(const char *fmt, int width, u_long value, short showvalue)
	144	{
	145	const char lsep, rsep;
	146	char newfmt[32];
	147
	148	lsep = "";
	149	if (strncmp(fmt, "LS", 2) == 0) {
	150	lsep = " ";
	151	fmt += 2;
	152	}
	153	rsep = " ";
	154	if (strncmp(fmt, "NRS", 3) == 0) {
	155	rsep = "";
	156	fmt += 3;
	157	}
	158	if (showvalue == 0) {
	159	/* Print just dash. */
	160	sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
	161	printf(newfmt, "-");
	162	return;
	163	}
	164
	165	if (hflag) {
	166	char buf[5];
	167
	168	/* Format in human readable form. */
	169	humanize_number(buf, sizeof(buf), (int64_t)value, "",
	170	HN_AUTOSCALE, HN_NOSPACE \| HN_DECIMAL);
	171	sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
	172	printf(newfmt, buf);
	173	} else {
	174	/* Construct the format string. */
	175	sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
	176	printf(newfmt, value);
	177	}
	178	}
	179
	180	/*
	181	* Print a description of the network interfaces.
	182	*/
	183	void
	184	intpr(int interval1, u_long ifnetaddr, void (pfunc)(char ))
	185	{
	186	struct ifnet ifnet;
	187	struct ifnethead ifnethead;
	188	union {
	189	struct ifaddr ifa;
	190	struct in_ifaddr in;
	191	#ifdef INET6
	192	struct in6_ifaddr in6;
	193	#endif
[b6ac989]	194	#ifndef __rtems__
[f1710b6]	195	struct ipx_ifaddr ipx;
[0a57e1d]	196	#endif /* __rtems__ */
[f1710b6]	197	} ifaddr;
	198	u_long ifaddraddr;
	199	u_long ifaddrfound;
	200	u_long opackets;
	201	u_long ipackets;
	202	u_long obytes;
	203	u_long ibytes;
	204	u_long omcasts;
	205	u_long imcasts;
	206	u_long oerrors;
	207	u_long ierrors;
	208	u_long idrops;
	209	u_long collisions;
	210	int drops;
	211	struct sockaddr *sa = NULL;
	212	char name[IFNAMSIZ];
	213	short network_layer;
	214	short link_layer;
	215
	216	if (ifnetaddr == 0) {
	217	printf("ifnet: symbol not defined\n");
	218	return;
	219	}
	220	if (interval1) {
	221	sidewaysintpr(interval1, ifnetaddr);
	222	return;
	223	}
	224	if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead) != 0)
	225	return;
	226	ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
	227	if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
	228	return;
	229
	230	if (!pfunc) {
	231	if (Wflag)
	232	printf("%-7.7s", "Name");
	233	else
	234	printf("%-5.5s", "Name");
	235	printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
	236	"Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
	237	if (bflag)
	238	printf(" %10.10s","Ibytes");
	239	printf(" %8.8s %5.5s", "Opkts", "Oerrs");
	240	if (bflag)
	241	printf(" %10.10s","Obytes");
	242	printf(" %5s", "Coll");
	243	if (dflag)
	244	printf(" %s", "Drop");
	245	putchar('\n');
	246	}
	247	ifaddraddr = 0;
	248	while (ifnetaddr \|\| ifaddraddr) {
	249	struct sockaddr_in *sockin;
	250	#ifdef INET6
	251	struct sockaddr_in6 *sockin6;
	252	#endif
	253	char *cp;
	254	int n, m;
	255
	256	network_layer = 0;
	257	link_layer = 0;
	258
	259	if (ifaddraddr == 0) {
	260	if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
	261	return;
	262	strlcpy(name, ifnet.if_xname, sizeof(name));
	263	ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
	264	if (interface != 0 && strcmp(name, interface) != 0)
	265	continue;
	266	cp = index(name, '\0');
	267
	268	if (pfunc) {
	269	(*pfunc)(name);
	270	continue;
	271	}
	272
	273	if ((ifnet.if_flags&IFF_UP) == 0)
	274	cp++ = '';
	275	*cp = '\0';
	276	ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
	277	}
	278	ifaddrfound = ifaddraddr;
	279
	280	/*
	281	* Get the interface stats. These may get
	282	* overriden below on a per-interface basis.
	283	*/
	284	opackets = ifnet.if_opackets;
	285	ipackets = ifnet.if_ipackets;
	286	obytes = ifnet.if_obytes;
	287	ibytes = ifnet.if_ibytes;
	288	omcasts = ifnet.if_omcasts;
	289	imcasts = ifnet.if_imcasts;
	290	oerrors = ifnet.if_oerrors;
	291	ierrors = ifnet.if_ierrors;
	292	idrops = ifnet.if_iqdrops;
	293	collisions = ifnet.if_collisions;
	294	drops = ifnet.if_snd.ifq_drops;
	295
	296	if (ifaddraddr == 0) {
	297	if (Wflag)
	298	printf("%-7.7s", name);
	299	else
	300	printf("%-5.5s", name);
	301	printf(" %5lu ", ifnet.if_mtu);
	302	printf("%-13.13s ", "none");
	303	printf("%-17.17s ", "none");
	304	} else {
	305	if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)
	306	!= 0) {
	307	ifaddraddr = 0;
	308	continue;
	309	}
	310	#define CP(x) ((char *)(x))
	311	cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
	312	CP(&ifaddr);
	313	sa = (struct sockaddr *)cp;
	314	if (af != AF_UNSPEC && sa->sa_family != af) {
	315	ifaddraddr =
	316	(u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
	317	continue;
	318	}
	319	if (Wflag)
	320	printf("%-7.7s", name);
	321	else
	322	printf("%-5.5s", name);
	323	printf(" %5lu ", ifnet.if_mtu);
	324	switch (sa->sa_family) {
	325	case AF_UNSPEC:
	326	printf("%-13.13s ", "none");
	327	printf("%-15.15s ", "none");
	328	break;
	329	case AF_INET:
	330	sockin = (struct sockaddr_in *)sa;
	331	#ifdef notdef
	332	/* can't use inet_makeaddr because kernel
	333	* keeps nets unshifted.
	334	*/
	335	in = inet_makeaddr(ifaddr.in.ia_subnet,
	336	INADDR_ANY);
	337	printf("%-13.13s ", netname(in.s_addr,
	338	ifaddr.in.ia_subnetmask));
	339	#else
	340	printf("%-13.13s ",
	341	netname(htonl(ifaddr.in.ia_subnet),
	342	ifaddr.in.ia_subnetmask));
	343	#endif
	344	printf("%-17.17s ",
	345	routename(sockin->sin_addr.s_addr));
	346
	347	network_layer = 1;
	348	break;
	349	#ifdef INET6
	350	case AF_INET6:
	351	sockin6 = (struct sockaddr_in6 *)sa;
[af5333e]	352	in6_fillscopeid(&ifaddr.in6.ia_addr);
[f1710b6]	353	printf("%-13.13s ",
	354	netname6(&ifaddr.in6.ia_addr,
	355	&ifaddr.in6.ia_prefixmask.sin6_addr));
[af5333e]	356	in6_fillscopeid(sockin6);
	357	getnameinfo(sa, sa->sa_len, addr_buf,
	358	sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
	359	printf("%-17.17s ", addr_buf);
[f1710b6]	360
	361	network_layer = 1;
	362	break;
	363	#endif /INET6/
[b6ac989]	364	#ifndef __rtems__
[f1710b6]	365	case AF_IPX:
	366	{
	367	struct sockaddr_ipx *sipx =
	368	(struct sockaddr_ipx *)sa;
	369	u_long net;
	370	char netnum[10];
	371
	372	(union ipx_net ) &net = sipx->sipx_addr.x_net;
	373	sprintf(netnum, "%lx", (u_long)ntohl(net));
	374	printf("ipx:%-8s ", netnum);
	375	/* printf("ipx:%-8s ", netname(net, 0L)); */
	376	printf("%-17s ",
	377	ipx_phost((struct sockaddr *)sipx));
	378	}
	379
	380	network_layer = 1;
	381	break;
[0a57e1d]	382	#endif /* __rtems__ */
[f1710b6]	383
[0fa7dab]	384	#ifndef __rtems__
[f1710b6]	385	case AF_APPLETALK:
	386	printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
	387	printf("%-11.11s ",atalk_print(sa,0x0b) );
	388	break;
[0a57e1d]	389	#endif /* __rtems__ */
[f1710b6]	390	case AF_LINK:
	391	{
	392	struct sockaddr_dl *sdl =
	393	(struct sockaddr_dl *)sa;
	394	char linknum[10];
	395	cp = (char *)LLADDR(sdl);
	396	n = sdl->sdl_alen;
	397	sprintf(linknum, "<Link#%d>", sdl->sdl_index);
	398	m = printf("%-13.13s ", linknum);
	399	}
	400	goto hexprint;
	401	default:
	402	m = printf("(%d)", sa->sa_family);
	403	for (cp = sa->sa_len + (char *)sa;
	404	--cp > sa->sa_data && (*cp == 0);) {}
	405	n = cp - sa->sa_data + 1;
	406	cp = sa->sa_data;
	407	hexprint:
[af5333e]	408	while ((--n >= 0) && (m < 30))
[f1710b6]	409	m += printf("%02x%c", *cp++ & 0xff,
	410	n > 0 ? ':' : ' ');
	411	m = 32 - m;
	412	while (m-- > 0)
	413	putchar(' ');
	414
	415	link_layer = 1;
	416	break;
	417	}
	418
	419	/*
	420	* Fixup the statistics for interfaces that
	421	* update stats for their network addresses
	422	*/
	423	if (network_layer) {
	424	opackets = ifaddr.in.ia_ifa.if_opackets;
	425	ipackets = ifaddr.in.ia_ifa.if_ipackets;
	426	obytes = ifaddr.in.ia_ifa.if_obytes;
	427	ibytes = ifaddr.in.ia_ifa.if_ibytes;
	428	}
	429
	430	ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
	431	}
	432
	433	show_stat("lu", 8, ipackets, link_layer\|network_layer);
	434	show_stat("lu", 5, ierrors, link_layer);
	435	show_stat("lu", 5, idrops, link_layer);
	436	if (bflag)
	437	show_stat("lu", 10, ibytes, link_layer\|network_layer);
	438
	439	show_stat("lu", 8, opackets, link_layer\|network_layer);
	440	show_stat("lu", 5, oerrors, link_layer);
	441	if (bflag)
	442	show_stat("lu", 10, obytes, link_layer\|network_layer);
	443
	444	show_stat("NRSlu", 5, collisions, link_layer);
	445	if (dflag)
	446	show_stat("LSd", 4, drops, link_layer);
	447	putchar('\n');
	448
	449	if (aflag && ifaddrfound) {
	450	/*
	451	* Print family's multicast addresses
	452	*/
	453	struct ifmultiaddr *multiaddr;
	454	struct ifmultiaddr ifma;
	455	union {
	456	struct sockaddr sa;
	457	struct sockaddr_in in;
	458	#ifdef INET6
	459	struct sockaddr_in6 in6;
	460	#endif /* INET6 */
	461	struct sockaddr_dl dl;
	462	} msa;
	463	const char *fmt;
	464
	465	TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
	466	if (kread((u_long)multiaddr, (char *)&ifma,
	467	sizeof ifma) != 0)
	468	break;
	469	multiaddr = &ifma;
	470	if (kread((u_long)ifma.ifma_addr, (char *)&msa,
	471	sizeof msa) != 0)
	472	break;
	473	if (msa.sa.sa_family != sa->sa_family)
	474	continue;
	475
	476	fmt = 0;
	477	switch (msa.sa.sa_family) {
	478	case AF_INET:
	479	fmt = routename(msa.in.sin_addr.s_addr);
	480	break;
	481	#ifdef INET6
	482	case AF_INET6:
[af5333e]	483	in6_fillscopeid(&msa.in6);
	484	getnameinfo(&msa.sa, msa.sa.sa_len,
	485	addr_buf, sizeof(addr_buf), 0, 0,
	486	NI_NUMERICHOST);
[f1710b6]	487	printf("%*s %-19.19s(refs: %d)\n",
	488	Wflag ? 27 : 25, "",
[af5333e]	489	addr_buf, ifma.ifma_refcount);
[f1710b6]	490	break;
	491	#endif /* INET6 */
	492	case AF_LINK:
	493	switch (msa.dl.sdl_type) {
	494	case IFT_ETHER:
	495	case IFT_FDDI:
	496	fmt = ether_ntoa(
	497	(struct ether_addr *)
	498	LLADDR(&msa.dl));
	499	break;
	500	}
	501	break;
	502	}
	503	if (fmt) {
	504	printf("%*s %-17.17s",
	505	Wflag ? 27 : 25, "", fmt);
	506	if (msa.sa.sa_family == AF_LINK) {
	507	printf(" %8lu", imcasts);
	508	printf("%*s",
	509	bflag ? 17 : 6, "");
	510	printf(" %8lu", omcasts);
	511	}
	512	putchar('\n');
	513	}
	514	}
	515	}
	516	}
	517	}
	518
	519	struct iftot {
	520	SLIST_ENTRY(iftot) chain;
	521	char ift_name[IFNAMSIZ]; /* interface name */
	522	u_long ift_ip; /* input packets */
	523	u_long ift_ie; /* input errors */
	524	u_long ift_id; /* input drops */
	525	u_long ift_op; /* output packets */
	526	u_long ift_oe; /* output errors */
	527	u_long ift_co; /* collisions */
	528	u_int ift_dr; /* drops */
	529	u_long ift_ib; /* input bytes */
	530	u_long ift_ob; /* output bytes */
	531	};
	532
	533	u_char signalled; /* set if alarm goes off "early" */
	534
	535	/*
	536	* Print a running summary of interface statistics.
	537	* Repeat display every interval1 seconds, showing statistics
	538	* collected over that interval. Assumes that interval1 is non-zero.
	539	* First line printed at top of screen is always cumulative.
	540	* XXX - should be rewritten to use ifmib(4).
	541	*/
	542	static void
	543	sidewaysintpr(int interval1, u_long off)
	544	{
	545	struct ifnet ifnet;
	546	u_long firstifnet;
	547	struct ifnethead ifnethead;
	548	struct itimerval interval_it;
	549	struct iftot iftot, ip, ipn, total, sum, interesting;
	550	int line;
	551	int oldmask, first;
	552	u_long interesting_off;
	553
	554	if (kread(off, (char *)&ifnethead, sizeof ifnethead) != 0)
	555	return;
	556	firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
	557
	558	if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
	559	printf("malloc failed\n");
	560	exit(1);
	561	}
	562	memset(iftot, 0, sizeof(struct iftot));
	563
	564	interesting = NULL;
	565	interesting_off = 0;
	566	for (off = firstifnet, ip = iftot; off;) {
	567	char name[IFNAMSIZ];
	568
	569	if (kread(off, (char *)&ifnet, sizeof ifnet) != 0)
	570	break;
	571	strlcpy(name, ifnet.if_xname, sizeof(name));
	572	if (interface && strcmp(name, interface) == 0) {
	573	interesting = ip;
	574	interesting_off = off;
	575	}
[66659ff]	576	snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);
[f1710b6]	577	if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
	578	printf("malloc failed\n");
	579	exit(1);
	580	}
	581	memset(ipn, 0, sizeof(struct iftot));
	582	SLIST_NEXT(ip, chain) = ipn;
	583	ip = ipn;
	584	off = (u_long)TAILQ_NEXT(&ifnet, if_link);
	585	}
	586	if (interface && interesting == NULL)
	587	errx(1, "%s: unknown interface", interface);
	588	if ((total = malloc(sizeof(struct iftot))) == NULL) {
	589	printf("malloc failed\n");
	590	exit(1);
	591	}
	592	memset(total, 0, sizeof(struct iftot));
	593	if ((sum = malloc(sizeof(struct iftot))) == NULL) {
	594	printf("malloc failed\n");
	595	exit(1);
	596	}
	597	memset(sum, 0, sizeof(struct iftot));
	598
	599	(void)signal(SIGALRM, catchalarm);
	600	signalled = NO;
	601	interval_it.it_interval.tv_sec = interval1;
	602	interval_it.it_interval.tv_usec = 0;
	603	interval_it.it_value = interval_it.it_interval;
	604	setitimer(ITIMER_REAL, &interval_it, NULL);
	605	first = 1;
	606	banner:
	607	printf("%17s %14s %16s", "input",
	608	interesting ? interesting->ift_name : "(Total)", "output");
	609	putchar('\n');
	610	printf("%10s %5s %5s %10s %10s %5s %10s %5s",
	611	"packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
	612	"colls");
	613	if (dflag)
	614	printf(" %5.5s", "drops");
	615	putchar('\n');
	616	fflush(stdout);
	617	line = 0;
	618	loop:
	619	if (interesting != NULL) {
	620	ip = interesting;
	621	if (kread(interesting_off, (char *)&ifnet, sizeof ifnet) != 0) {
	622	printf("???\n");
	623	exit(1);
	624	};
	625	if (!first) {
	626	show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1);
	627	show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1);
	628	show_stat("lu", 5, ifnet.if_iqdrops - ip->ift_id, 1);
	629	show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1);
	630	show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1);
	631	show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1);
	632	show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1);
	633	show_stat("NRSlu", 5,
	634	ifnet.if_collisions - ip->ift_co, 1);
	635	if (dflag)
	636	show_stat("LSu", 5,
	637	ifnet.if_snd.ifq_drops - ip->ift_dr, 1);
	638	}
	639	ip->ift_ip = ifnet.if_ipackets;
	640	ip->ift_ie = ifnet.if_ierrors;
	641	ip->ift_id = ifnet.if_iqdrops;
	642	ip->ift_ib = ifnet.if_ibytes;
	643	ip->ift_op = ifnet.if_opackets;
	644	ip->ift_oe = ifnet.if_oerrors;
	645	ip->ift_ob = ifnet.if_obytes;
	646	ip->ift_co = ifnet.if_collisions;
	647	ip->ift_dr = ifnet.if_snd.ifq_drops;
	648	} else {
	649	sum->ift_ip = 0;
	650	sum->ift_ie = 0;
	651	sum->ift_id = 0;
	652	sum->ift_ib = 0;
	653	sum->ift_op = 0;
	654	sum->ift_oe = 0;
	655	sum->ift_ob = 0;
	656	sum->ift_co = 0;
	657	sum->ift_dr = 0;
	658	for (off = firstifnet, ip = iftot;
	659	off && SLIST_NEXT(ip, chain) != NULL;
	660	ip = SLIST_NEXT(ip, chain)) {
	661	if (kread(off, (char *)&ifnet, sizeof ifnet) != 0) {
	662	off = 0;
	663	continue;
	664	}
	665	sum->ift_ip += ifnet.if_ipackets;
	666	sum->ift_ie += ifnet.if_ierrors;
	667	sum->ift_id += ifnet.if_iqdrops;
	668	sum->ift_ib += ifnet.if_ibytes;
	669	sum->ift_op += ifnet.if_opackets;
	670	sum->ift_oe += ifnet.if_oerrors;
	671	sum->ift_ob += ifnet.if_obytes;
	672	sum->ift_co += ifnet.if_collisions;
	673	sum->ift_dr += ifnet.if_snd.ifq_drops;
	674	off = (u_long)TAILQ_NEXT(&ifnet, if_link);
	675	}
	676	if (!first) {
	677	show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1);
	678	show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1);
	679	show_stat("lu", 5, sum->ift_id - total->ift_id, 1);
	680	show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1);
	681	show_stat("lu", 10, sum->ift_op - total->ift_op, 1);
	682	show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1);
	683	show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1);
	684	show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1);
	685	if (dflag)
	686	show_stat("LSu", 5,
	687	sum->ift_dr - total->ift_dr, 1);
	688	}
	689	total = sum;
	690	}
	691	if (!first)
	692	putchar('\n');
	693	fflush(stdout);
	694	if ((noutputs != 0) && (--noutputs == 0))
	695	exit(0);
[346810a]	696	#ifdef __rtems__
	697	{
	698	sigset_t oldmask, desired, empty;
	699
	700	sigemptyset(&empty);
	701	sigemptyset(&desired);
	702	sigaddset(&desired, SIGALRM);
	703	sigprocmask(SIG_BLOCK, &desired, &oldmask);
	704	while (!signalled)
	705	sigsuspend(&desired);
	706	signalled = NO;
	707	sigprocmask(SIG_SETMASK, &oldmask, NULL);
	708	}
[0a57e1d]	709	#else /* __rtems__ */
[f1710b6]	710	oldmask = sigblock(sigmask(SIGALRM));
	711	while (!signalled)
	712	sigpause(0);
	713	signalled = NO;
	714	sigsetmask(oldmask);
[0a57e1d]	715	#endif /* __rtems__ */
[f1710b6]	716	line++;
	717	first = 0;
	718	if (line == 21)
	719	goto banner;
	720	else
	721	goto loop;
	722	/NOTREACHED/
	723	}
	724
	725	/*
	726	* Set a flag to indicate that a signal from the periodic itimer has been
	727	* caught.
	728	*/
	729	static void
	730	catchalarm(int signo __unused)
	731	{
	732	signalled = YES;
	733	}

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