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NetBSD/usr.bin/netstat/if.c

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/* $NetBSD: if.c,v 1.57 2003/11/15 11:54:34 ragge Exp $ */
/*
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94";
#else
__RCSID("$NetBSD: if.c,v 1.57 2003/11/15 11:54:34 ragge Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netns/ns.h>
#include <netns/ns_if.h>
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#include <arpa/inet.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include "netstat.h"
#define YES 1
#define NO 0
static void sidewaysintpr __P((u_int, u_long));
static void catchalarm __P((int));
/*
* Print a description of the network interfaces.
* NOTE: ifnetaddr is the location of the kernel global "ifnet",
* which is a TAILQ_HEAD.
*/
void
intpr(interval, ifnetaddr, pfunc)
int interval;
u_long ifnetaddr;
void (*pfunc)(char *);
{
struct ifnet ifnet;
union {
struct ifaddr ifa;
struct in_ifaddr in;
#ifdef INET6
struct in6_ifaddr in6;
#endif /* INET6 */
struct ns_ifaddr ns;
struct iso_ifaddr iso;
} ifaddr;
u_long ifaddraddr;
struct sockaddr *sa;
struct ifnet_head ifhead; /* TAILQ_HEAD */
char name[IFNAMSIZ + 1]; /* + 1 for `*' */
char hbuf[NI_MAXHOST]; /* for getnameinfo() */
#ifdef INET6
#ifdef NI_WITHSCOPEID
const int niflag = NI_NUMERICHOST | NI_WITHSCOPEID;
#else
const int niflag = NI_NUMERICHOST;
#endif
#endif
if (ifnetaddr == 0) {
printf("ifnet: symbol not defined\n");
return;
}
if (interval) {
sidewaysintpr((unsigned)interval, ifnetaddr);
return;
}
/*
* Find the pointer to the first ifnet structure. Replace
* the pointer to the TAILQ_HEAD with the actual pointer
* to the first list element.
*/
if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead))
return;
ifnetaddr = (u_long)ifhead.tqh_first;
if (!sflag & !pflag) {
if (bflag) {
printf("%-5.5s %-5.5s %-13.13s %-17.17s "
"%10.10s %10.10s",
"Name", "Mtu", "Network", "Address",
"Ibytes", "Obytes");
} else {
printf("%-5.5s %-5.5s %-13.13s %-17.17s "
"%8.8s %5.5s %8.8s %5.5s %5.5s",
"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs",
"Opkts", "Oerrs", "Colls");
}
if (tflag)
printf(" %4.4s", "Time");
if (dflag)
printf(" %5.5s", "Drops");
putchar('\n');
}
ifaddraddr = 0;
while (ifnetaddr || ifaddraddr) {
struct sockaddr_in *sin;
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif /* INET6 */
char *cp;
int n, m;
if (ifaddraddr == 0) {
if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
return;
memmove(name, ifnet.if_xname, IFNAMSIZ);
name[IFNAMSIZ - 1] = '\0'; /* sanity */
ifnetaddr = (u_long)ifnet.if_list.tqe_next;
if (interface != 0 && strcmp(name, interface) != 0)
continue;
cp = strchr(name, '\0');
if (pfunc) {
(*pfunc)(name);
continue;
}
if ((ifnet.if_flags & IFF_UP) == 0)
*cp++ = '*';
*cp = '\0';
ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first;
}
if (vflag)
n = strlen(name) < 5 ? 5 : strlen(name);
else
n = 5;
printf("%-*.*s %-5llu ", n, n, name,
(unsigned long long)ifnet.if_mtu);
if (ifaddraddr == 0) {
printf("%-13.13s ", "none");
printf("%-17.17s ", "none");
} else {
char hexsep = '.'; /* for hexprint */
static const char hexfmt[] = "%02x%c"; /* for hexprint */
if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
ifaddraddr = 0;
continue;
}
#define CP(x) ((char *)(x))
cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
CP(&ifaddr);
sa = (struct sockaddr *)cp;
switch (sa->sa_family) {
case AF_UNSPEC:
printf("%-13.13s ", "none");
printf("%-17.17s ", "none");
break;
case AF_INET:
sin = (struct sockaddr_in *)sa;
#ifdef notdef
/*
* can't use inet_makeaddr because kernel
* keeps nets unshifted.
*/
in = inet_makeaddr(ifaddr.in.ia_subnet,
INADDR_ANY);
cp = netname(in.s_addr,
ifaddr.in.ia_subnetmask);
#else
cp = netname(ifaddr.in.ia_subnet,
ifaddr.in.ia_subnetmask);
#endif
if (vflag)
n = strlen(cp) < 13 ? 13 : strlen(cp);
else
n = 13;
printf("%-*.*s ", n, n, cp);
cp = routename(sin->sin_addr.s_addr);
if (vflag)
n = strlen(cp) < 17 ? 17 : strlen(cp);
else
n = 17;
printf("%-*.*s ", n, n, cp);
if (aflag) {
u_long multiaddr;
struct in_multi inm;
multiaddr = (u_long)
ifaddr.in.ia_multiaddrs.lh_first;
while (multiaddr != 0) {
kread(multiaddr, (char *)&inm,
sizeof inm);
printf("\n%25s %-17.17s ", "",
routename(
inm.inm_addr.s_addr));
multiaddr =
(u_long)inm.inm_list.le_next;
}
}
break;
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)sa;
#ifdef __KAME__
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
sin6->sin6_scope_id =
ntohs(*(u_int16_t *)
&sin6->sin6_addr.s6_addr[2]);
/* too little width */
if (!vflag)
sin6->sin6_scope_id = 0;
sin6->sin6_addr.s6_addr[2] = 0;
sin6->sin6_addr.s6_addr[3] = 0;
}
#endif
cp = netname6(&ifaddr.in6.ia_addr,
&ifaddr.in6.ia_prefixmask.sin6_addr);
if (vflag)
n = strlen(cp) < 13 ? 13 : strlen(cp);
else
n = 13;
printf("%-*.*s ", n, n, cp);
if (getnameinfo((struct sockaddr *)sin6,
sin6->sin6_len,
hbuf, sizeof(hbuf), NULL, 0,
niflag) != 0) {
cp = "?";
} else
cp = hbuf;
if (vflag)
n = strlen(cp) < 17 ? 17 : strlen(cp);
else
n = 17;
printf("%-*.*s ", n, n, cp);
if (aflag) {
u_long multiaddr;
struct in6_multi inm;
struct sockaddr_in6 sin6;
multiaddr = (u_long)
ifaddr.in6.ia6_multiaddrs.lh_first;
while (multiaddr != 0) {
kread(multiaddr, (char *)&inm,
sizeof inm);
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = inm.in6m_addr;
#ifdef __KAME__
if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) {
sin6.sin6_scope_id =
ntohs(*(u_int16_t *)
&sin6.sin6_addr.s6_addr[2]);
sin6.sin6_addr.s6_addr[2] = 0;
sin6.sin6_addr.s6_addr[3] = 0;
}
#endif
if (getnameinfo((struct sockaddr *)&sin6,
sin6.sin6_len, hbuf,
sizeof(hbuf), NULL, 0,
niflag) != 0) {
strlcpy(hbuf, "??",
sizeof(hbuf));
}
cp = hbuf;
if (vflag)
n = strlen(cp) < 17
? 17 : strlen(cp);
else
n = 17;
printf("\n%25s %-*.*s ", "",
n, n, cp);
multiaddr =
(u_long)inm.in6m_entry.le_next;
}
}
break;
#endif /*INET6*/
#ifndef SMALL
case AF_APPLETALK:
printf("atalk:%-7.7s ",
atalk_print(sa,0x10));
printf("%-17.17s ", atalk_print(sa,0x0b));
break;
case AF_NS:
{
struct sockaddr_ns *sns =
(struct sockaddr_ns *)sa;
u_long net;
char netnum[10];
*(union ns_net *)&net = sns->sns_addr.x_net;
(void)snprintf(netnum, sizeof(netnum), "%xH",
(u_int32_t)ntohl(net));
upHex(netnum);
printf("ns:%-10s ", netnum);
printf("%-17.17s ",
ns_phost((struct sockaddr *)sns));
}
break;
#endif
case AF_LINK:
printf("%-13.13s ", "<Link>");
if (getnameinfo(sa, sa->sa_len,
hbuf, sizeof(hbuf), NULL, 0,
NI_NUMERICHOST) != 0) {
cp = "?";
} else
cp = hbuf;
if (vflag)
n = strlen(cp) < 17 ? 17 : strlen(cp);
else
n = 17;
printf("%-*.*s ", n, n, cp);
break;
default:
m = printf("(%d)", sa->sa_family);
for (cp = sa->sa_len + (char *)sa;
--cp > sa->sa_data && (*cp == 0);) {}
n = cp - sa->sa_data + 1;
cp = sa->sa_data;
while (--n >= 0)
m += printf(hexfmt, *cp++ & 0xff,
n > 0 ? hexsep : ' ');
m = 32 - m;
while (m-- > 0)
putchar(' ');
break;
}
ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next;
}
if (bflag) {
printf("%10llu %10llu",
(unsigned long long)ifnet.if_ibytes,
(unsigned long long)ifnet.if_obytes);
} else {
printf("%8llu %5llu %8llu %5llu %5llu",
(unsigned long long)ifnet.if_ipackets,
(unsigned long long)ifnet.if_ierrors,
(unsigned long long)ifnet.if_opackets,
(unsigned long long)ifnet.if_oerrors,
(unsigned long long)ifnet.if_collisions);
}
if (tflag)
printf(" %4d", ifnet.if_timer);
if (dflag)
printf(" %5d", ifnet.if_snd.ifq_drops);
putchar('\n');
}
}
#define MAXIF 100
struct iftot {
char ift_name[IFNAMSIZ]; /* interface name */
u_quad_t ift_ip; /* input packets */
u_quad_t ift_ib; /* input bytes */
u_quad_t ift_ie; /* input errors */
u_quad_t ift_op; /* output packets */
u_quad_t ift_ob; /* output bytes */
u_quad_t ift_oe; /* output errors */
u_quad_t ift_co; /* collisions */
int ift_dr; /* drops */
} iftot[MAXIF];
u_char signalled; /* set if alarm goes off "early" */
/*
* Print a running summary of interface statistics.
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
*/
static void
sidewaysintpr(interval, off)
unsigned interval;
u_long off;
{
struct itimerval it;
struct ifnet ifnet;
u_long firstifnet;
struct iftot *ip, *total;
int line;
struct iftot *lastif, *sum, *interesting;
struct ifnet_head ifhead; /* TAILQ_HEAD */
int oldmask;
/*
* Find the pointer to the first ifnet structure. Replace
* the pointer to the TAILQ_HEAD with the actual pointer
* to the first list element.
*/
if (kread(off, (char *)&ifhead, sizeof ifhead))
return;
firstifnet = (u_long)ifhead.tqh_first;
lastif = iftot;
sum = iftot + MAXIF - 1;
total = sum - 1;
interesting = (interface == NULL) ? iftot : NULL;
for (off = firstifnet, ip = iftot; off;) {
if (kread(off, (char *)&ifnet, sizeof ifnet))
break;
memset(ip->ift_name, 0, sizeof(ip->ift_name));
snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname);
if (interface && strcmp(ifnet.if_xname, interface) == 0)
interesting = ip;
ip++;
if (ip >= iftot + MAXIF - 2)
break;
off = (u_long)ifnet.if_list.tqe_next;
}
if (interesting == NULL) {
fprintf(stderr, "%s: %s: unknown interface\n",
getprogname(), interface);
exit(1);
}
lastif = ip;
(void)signal(SIGALRM, catchalarm);
signalled = NO;
it.it_interval.tv_sec = it.it_value.tv_sec = interval;
it.it_interval.tv_usec = it.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &it, NULL);
banner:
if (bflag)
printf("%7.7s in %8.8s %6.6s out %5.5s",
interesting->ift_name, " ",
interesting->ift_name, " ");
else
printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
interesting->ift_name, " ",
interesting->ift_name, " ", " ");
if (dflag)
printf(" %5.5s", " ");
if (lastif - iftot > 0) {
if (bflag)
printf(" %7.7s in %8.8s %6.6s out %5.5s",
"total", " ", "total", " ");
else
printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s",
"total", " ", "total", " ", " ");
if (dflag)
printf(" %5.5s", " ");
}
for (ip = iftot; ip < iftot + MAXIF; ip++) {
ip->ift_ip = 0;
ip->ift_ib = 0;
ip->ift_ie = 0;
ip->ift_op = 0;
ip->ift_ob = 0;
ip->ift_oe = 0;
ip->ift_co = 0;
ip->ift_dr = 0;
}
putchar('\n');
if (bflag)
printf("%10.10s %8.8s %10.10s %5.5s",
"bytes", " ", "bytes", " ");
else
printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
"packets", "errs", "packets", "errs", "colls");
if (dflag)
printf(" %5.5s", "drops");
if (lastif - iftot > 0) {
if (bflag)
printf(" %10.10s %8.8s %10.10s %5.5s",
"bytes", " ", "bytes", " ");
else
printf(" %8.8s %5.5s %8.8s %5.5s %5.5s",
"packets", "errs", "packets", "errs", "colls");
if (dflag)
printf(" %5.5s", "drops");
}
putchar('\n');
fflush(stdout);
line = 0;
loop:
sum->ift_ip = 0;
sum->ift_ib = 0;
sum->ift_ie = 0;
sum->ift_op = 0;
sum->ift_ob = 0;
sum->ift_oe = 0;
sum->ift_co = 0;
sum->ift_dr = 0;
for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
if (kread(off, (char *)&ifnet, sizeof ifnet)) {
off = 0;
continue;
}
if (ip == interesting) {
if (bflag) {
printf("%10llu %8.8s %10llu %5.5s",
(unsigned long long)(ifnet.if_ibytes -
ip->ift_ib), " ",
(unsigned long long)(ifnet.if_obytes -
ip->ift_ob), " ");
} else {
printf("%8llu %5llu %8llu %5llu %5llu",
(unsigned long long)
(ifnet.if_ipackets - ip->ift_ip),
(unsigned long long)
(ifnet.if_ierrors - ip->ift_ie),
(unsigned long long)
(ifnet.if_opackets - ip->ift_op),
(unsigned long long)
(ifnet.if_oerrors - ip->ift_oe),
(unsigned long long)
(ifnet.if_collisions - ip->ift_co));
}
if (dflag)
printf(" %5llu",
(unsigned long long)
(ifnet.if_snd.ifq_drops - ip->ift_dr));
}
ip->ift_ip = ifnet.if_ipackets;
ip->ift_ib = ifnet.if_ibytes;
ip->ift_ie = ifnet.if_ierrors;
ip->ift_op = ifnet.if_opackets;
ip->ift_ob = ifnet.if_obytes;
ip->ift_oe = ifnet.if_oerrors;
ip->ift_co = ifnet.if_collisions;
ip->ift_dr = ifnet.if_snd.ifq_drops;
sum->ift_ip += ip->ift_ip;
sum->ift_ib += ip->ift_ib;
sum->ift_ie += ip->ift_ie;
sum->ift_op += ip->ift_op;
sum->ift_ob += ip->ift_ob;
sum->ift_oe += ip->ift_oe;
sum->ift_co += ip->ift_co;
sum->ift_dr += ip->ift_dr;
off = (u_long)ifnet.if_list.tqe_next;
}
if (lastif - iftot > 0) {
if (bflag) {
printf(" %10llu %8.8s %10llu %5.5s",
(unsigned long long)
(sum->ift_ib - total->ift_ib), " ",
(unsigned long long)
(sum->ift_ob - total->ift_ob), " ");
} else {
printf(" %8llu %5llu %8llu %5llu %5llu",
(unsigned long long)
(sum->ift_ip - total->ift_ip),
(unsigned long long)
(sum->ift_ie - total->ift_ie),
(unsigned long long)
(sum->ift_op - total->ift_op),
(unsigned long long)
(sum->ift_oe - total->ift_oe),
(unsigned long long)
(sum->ift_co - total->ift_co));
}
if (dflag)
printf(" %5llu",
(unsigned long long)(sum->ift_dr - total->ift_dr));
}
*total = *sum;
putchar('\n');
fflush(stdout);
line++;
oldmask = sigblock(sigmask(SIGALRM));
if (! signalled) {
sigpause(0);
}
sigsetmask(oldmask);
signalled = NO;
if (line == 21)
goto banner;
goto loop;
/*NOTREACHED*/
}
/*
* Called if an interval expires before sidewaysintpr has completed a loop.
* Sets a flag to not wait for the alarm.
*/
static void
catchalarm(signo)
int signo;
{
signalled = YES;
}
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