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NetBSD/usr.bin/netstat/if.c

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/* $NetBSD: if.c,v 1.25 1997/10/19 05:49:58 lukem 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 1.25 1997/10/19 05:49:58 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/protosw.h>
#include <sys/socket.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 <string.h>
#include <unistd.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)
int interval;
u_long ifnetaddr;
{
struct ifnet ifnet;
union {
struct ifaddr ifa;
struct in_ifaddr in;
struct ns_ifaddr ns;
struct iso_ifaddr iso;
} ifaddr;
u_long ifaddraddr;
struct sockaddr *sa;
struct ifnet_head ifhead; /* TAILQ_HEAD */
char name[IFNAMSIZ];
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;
printf("%-5.5s %-5.5s %-13.13s %-17.17s %8.8s %5.5s %8.8s %5.5s",
"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs",
"Opkts", "Oerrs");
printf(" %5s", "Coll");
if (tflag)
printf(" %s", "Time");
if (dflag)
printf(" %s", "Drop");
putchar('\n');
ifaddraddr = 0;
while (ifnetaddr || ifaddraddr) {
struct sockaddr_in *sin;
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 ((ifnet.if_flags & IFF_UP) == 0)
*cp++ = '*';
*cp = '\0';
ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first;
}
printf("%-5.5s %-5ld ", name, ifnet.if_mtu);
if (ifaddraddr == 0) {
printf("%-13.13s ", "none");
printf("%-17.17s ", "none");
} else {
char hexsep = '.'; /* for hexprint */
const char *hexfmt = "%x%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);
printf("%-13.13s ", netname(in.s_addr,
ifaddr.in.ia_subnetmask));
#else
printf("%-13.13s ",
netname(ifaddr.in.ia_subnet,
ifaddr.in.ia_subnetmask));
#endif
printf("%-17.17s ",
routename(sin->sin_addr.s_addr));
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;
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[8];
*(union ns_net *) &net = sns->sns_addr.x_net;
sprintf(netnum, "%xH", (u_int32_t) ntohl(net));
upHex(netnum);
printf("ns:%-10s ", netnum);
printf("%-17.17s ",
ns_phost((struct sockaddr *)sns));
}
break;
case AF_LINK:
{
struct sockaddr_dl *sdl =
(struct sockaddr_dl *)sa;
cp = (char *)LLADDR(sdl);
if (sdl->sdl_type == IFT_FDDI
|| sdl->sdl_type == IFT_ETHER)
hexsep = ':', hexfmt = "%02x%c";
n = sdl->sdl_alen;
}
m = printf("%-13.13s ", "<Link>");
goto hexprint;
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;
hexprint:
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;
}
printf("%8ld %5ld %8ld %5ld %5ld",
ifnet.if_ipackets, ifnet.if_ierrors,
ifnet.if_opackets, ifnet.if_oerrors,
ifnet.if_collisions);
if (tflag)
printf(" %3d", ifnet.if_timer);
if (dflag)
printf(" %3d", ifnet.if_snd.ifq_drops);
putchar('\n');
}
}
#define MAXIF 100
struct iftot {
char ift_name[IFNAMSIZ]; /* interface name */
int ift_ip; /* input packets */
int ift_ie; /* input errors */
int ift_op; /* output packets */
int ift_oe; /* output errors */
int 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 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",
__progname, interface);
exit(1);
}
lastif = ip;
(void)signal(SIGALRM, catchalarm);
signalled = NO;
(void)alarm(interval);
banner:
printf(" input %-6.6s output ", interesting->ift_name);
if (lastif - iftot > 0) {
if (dflag)
printf(" ");
printf(" input (Total) output");
}
for (ip = iftot; ip < iftot + MAXIF; ip++) {
ip->ift_ip = 0;
ip->ift_ie = 0;
ip->ift_op = 0;
ip->ift_oe = 0;
ip->ift_co = 0;
ip->ift_dr = 0;
}
putchar('\n');
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)
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_ie = 0;
sum->ift_op = 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) {
printf("%8ld %5ld %8ld %5ld %5ld",
ifnet.if_ipackets - ip->ift_ip,
ifnet.if_ierrors - ip->ift_ie,
ifnet.if_opackets - ip->ift_op,
ifnet.if_oerrors - ip->ift_oe,
ifnet.if_collisions - ip->ift_co);
if (dflag)
printf(" %5d",
ifnet.if_snd.ifq_drops - ip->ift_dr);
}
ip->ift_ip = ifnet.if_ipackets;
ip->ift_ie = ifnet.if_ierrors;
ip->ift_op = ifnet.if_opackets;
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_ie += ip->ift_ie;
sum->ift_op += ip->ift_op;
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) {
printf(" %8d %5d %8d %5d %5d",
sum->ift_ip - total->ift_ip,
sum->ift_ie - total->ift_ie,
sum->ift_op - total->ift_op,
sum->ift_oe - total->ift_oe,
sum->ift_co - total->ift_co);
if (dflag)
printf(" %5d", 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;
(void)alarm(interval);
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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