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off by one error in printing default ifaddrs
[unix-history] / usr / src / usr.bin / netstat / if.c
/*
* Copyright (c) 1983, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)if.c 5.12 (Berkeley) %G%";
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netns/ns.h>
#include <netns/ns_if.h>
#include <stdio.h>
#include <signal.h>
#define YES 1
#define NO 0
extern int kmem;
extern int tflag;
extern int dflag;
extern int nflag;
extern char *interface;
extern int unit;
extern char *routename(), *netname(), *ns_phost();
/*
* Print a description of the network interfaces.
*/
intpr(interval, ifnetaddr)
int interval;
off_t ifnetaddr;
{
struct ifnet ifnet;
union {
struct ifaddr ifa;
struct in_ifaddr in;
struct ns_ifaddr ns;
} ifaddr;
off_t ifaddraddr;
struct sockaddr *sa;
char name[16];
if (ifnetaddr == 0) {
printf("ifnet: symbol not defined\n");
return;
}
if (interval) {
sidewaysintpr((unsigned)interval, ifnetaddr);
return;
}
klseek(kmem, ifnetaddr, 0);
read(kmem, (char *)&ifnetaddr, sizeof ifnetaddr);
printf("%-5.5s %-5.5s %-11.11s %-15.15s %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;
register char *cp;
int n, m;
char *index();
struct in_addr inet_makeaddr();
if (ifaddraddr == 0) {
klseek(kmem, ifnetaddr, 0);
read(kmem, (char *)&ifnet, sizeof ifnet);
klseek(kmem, (off_t)ifnet.if_name, 0);
read(kmem, name, 16);
name[15] = '\0';
ifnetaddr = (off_t) ifnet.if_next;
if (interface != 0 &&
(strcmp(name, interface) != 0 || unit != ifnet.if_unit))
continue;
cp = index(name, '\0');
*cp++ = ifnet.if_unit + '0';
if ((ifnet.if_flags&IFF_UP) == 0)
*cp++ = '*';
*cp = '\0';
ifaddraddr = (off_t)ifnet.if_addrlist;
}
printf("%-5.5s %-5d ", name, ifnet.if_mtu);
if (ifaddraddr == 0) {
printf("%-11.11s ", "none");
printf("%-15.15s ", "none");
} else {
klseek(kmem, ifaddraddr, 0);
read(kmem, (char *)&ifaddr, sizeof ifaddr);
#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("%-11.11s ", "none");
printf("%-15.15s ", "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("%-11.11s ", netname(in));
#else
printf("%-11.11s ",
netname(htonl(ifaddr.in.ia_subnet),
ifaddr.in.ia_subnetmask));
#endif
printf("%-15.15s ", routename(sin->sin_addr));
break;
case AF_NS:
{
struct sockaddr_ns *sns =
(struct sockaddr_ns *)sa;
u_long net;
char netnum[8];
char *ns_phost();
*(union ns_net *) &net = sns->sns_addr.x_net;
sprintf(netnum, "%lxH", ntohl(net));
upHex(netnum);
printf("ns:%-8s ", netnum);
printf("%-15s ", ns_phost(sns));
}
break;
case AF_LINK:
{
struct sockaddr_dl *sdl =
(struct sockaddr_dl *)sa;
cp = (char *)LLADDR(sdl);
n = sdl->sdl_alen;
}
m = printf("<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("%x%c", *cp++ & 0xff,
n > 0 ? '.' : ' ');
m = 28 - m;
while (m-- > 0)
putchar(' ');
break;
}
ifaddraddr = (off_t)ifaddr.ifa.ifa_next;
}
printf("%8d %5d %8d %5d %5d",
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 10
struct iftot {
char ift_name[16]; /* 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.
*/
sidewaysintpr(interval, off)
unsigned interval;
off_t off;
{
struct ifnet ifnet;
off_t firstifnet;
register struct iftot *ip, *total;
register int line;
struct iftot *lastif, *sum, *interesting;
int oldmask;
int catchalarm();
klseek(kmem, off, 0);
read(kmem, (char *)&firstifnet, sizeof (off_t));
lastif = iftot;
sum = iftot + MAXIF - 1;
total = sum - 1;
interesting = iftot;
for (off = firstifnet, ip = iftot; off;) {
char *cp;
klseek(kmem, off, 0);
read(kmem, (char *)&ifnet, sizeof ifnet);
klseek(kmem, (off_t)ifnet.if_name, 0);
ip->ift_name[0] = '(';
read(kmem, ip->ift_name + 1, 15);
if (interface && strcmp(ip->ift_name + 1, interface) == 0 &&
unit == ifnet.if_unit)
interesting = ip;
ip->ift_name[15] = '\0';
cp = index(ip->ift_name, '\0');
sprintf(cp, "%d)", ifnet.if_unit);
ip++;
if (ip >= iftot + MAXIF - 2)
break;
off = (off_t) ifnet.if_next;
}
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++) {
klseek(kmem, off, 0);
read(kmem, (char *)&ifnet, sizeof ifnet);
if (ip == interesting) {
printf("%8d %5d %8d %5d %5d",
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 = (off_t) ifnet.if_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.
*/
catchalarm()
{
signalled = YES;
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.