freebsd-dev/usr.bin/netstat/if.c
Bruce M Simpson 25d295e1ed Fix some minor nits in netstat whereby large interface names would be
truncated. In environments where many tunnel or vlan interfaces are created,
interface names have high numbers which overflow the field width.

PRs:		bin/52349, bin/35838
Submitted by:	Mike Tancsa, Scot W. Hetzel
Approved by:	re (rwatson)
2003-11-28 17:34:23 +00:00

660 lines
16 KiB
C

/*
* 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.
*/
#ifndef lint
/*
static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
*/
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/types.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/bridge.h>
#include <net/ethernet.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#include <arpa/inet.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
#define YES 1
#define NO 0
static void sidewaysintpr (u_int, u_long);
static void catchalarm (int);
#ifdef INET6
static char ntop_buf[INET6_ADDRSTRLEN]; /* for inet_ntop() */
static int bdg_done;
#endif
/* print bridge statistics */
void
bdg_stats(u_long dummy __unused, const char *name, int af1 __unused)
{
int i;
size_t slen ;
struct bdg_stats s ;
int mib[4] ;
slen = sizeof(s);
mib[0] = CTL_NET ;
mib[1] = PF_LINK ;
mib[2] = IFT_ETHER ;
mib[3] = PF_BDG ;
if (sysctl(mib,4, &s,&slen,NULL,0)==-1)
return ; /* no bridging */
#ifdef INET6
if (bdg_done != 0)
return;
else
bdg_done = 1;
#endif
printf("-- Bridging statistics (%s) --\n", name) ;
printf(
"Name In Out Forward Drop Bcast Mcast Local Unknown\n");
for (i = 0 ; i < 16 ; i++) {
if (s.s[i].name[0])
printf("%-6s %9ld%9ld%9ld%9ld%9ld%9ld%9ld%9ld\n",
s.s[i].name,
s.s[i].p_in[(int)BDG_IN],
s.s[i].p_in[(int)BDG_OUT],
s.s[i].p_in[(int)BDG_FORWARD],
s.s[i].p_in[(int)BDG_DROP],
s.s[i].p_in[(int)BDG_BCAST],
s.s[i].p_in[(int)BDG_MCAST],
s.s[i].p_in[(int)BDG_LOCAL],
s.s[i].p_in[(int)BDG_UNKNOWN] );
}
}
/*
* Display a formatted value, or a '-' in the same space.
*/
static void
show_stat(const char *fmt, int width, u_long value, short showvalue)
{
char newfmt[32];
/* Construct the format string */
if (showvalue) {
sprintf(newfmt, "%%%d%s", width, fmt);
printf(newfmt, value);
} else {
sprintf(newfmt, "%%%ds", width);
printf(newfmt, "-");
}
}
/*
* Print a description of the network interfaces.
*/
void
intpr(int _interval, u_long ifnetaddr, void (*pfunc)(char *))
{
struct ifnet ifnet;
struct ifnethead ifnethead;
union {
struct ifaddr ifa;
struct in_ifaddr in;
#ifdef INET6
struct in6_ifaddr in6;
#endif
struct ipx_ifaddr ipx;
} ifaddr;
u_long ifaddraddr;
u_long ifaddrfound;
u_long ifnetfound;
u_long opackets;
u_long ipackets;
u_long obytes;
u_long ibytes;
u_long oerrors;
u_long ierrors;
u_long collisions;
short timer;
int drops;
struct sockaddr *sa = NULL;
char name[IFNAMSIZ];
short network_layer;
short link_layer;
if (ifnetaddr == 0) {
printf("ifnet: symbol not defined\n");
return;
}
if (_interval) {
sidewaysintpr((unsigned)_interval, ifnetaddr);
return;
}
if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
return;
ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
return;
if (!pfunc) {
if (Wflag)
printf("%-7.7s", "Name");
else
printf("%-5.5s", "Name");
printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s",
"Mtu", "Network", "Address", "Ipkts", "Ierrs");
if (bflag)
printf(" %10.10s","Ibytes");
printf(" %8.8s %5.5s", "Opkts", "Oerrs");
if (bflag)
printf(" %10.10s","Obytes");
printf(" %5s", "Coll");
if (tflag)
printf(" %s", "Time");
if (dflag)
printf(" %s", "Drop");
putchar('\n');
}
ifaddraddr = 0;
while (ifnetaddr || ifaddraddr) {
struct sockaddr_in *sin;
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif
char *cp;
int n, m;
network_layer = 0;
link_layer = 0;
if (ifaddraddr == 0) {
ifnetfound = ifnetaddr;
if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
return;
strlcpy(name, ifnet.if_xname, sizeof(name));
ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
if (interface != 0 && (strcmp(name, interface) != 0))
continue;
cp = index(name, '\0');
if (pfunc) {
(*pfunc)(name);
continue;
}
if ((ifnet.if_flags&IFF_UP) == 0)
*cp++ = '*';
*cp = '\0';
ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
}
ifaddrfound = ifaddraddr;
/*
* Get the interface stats. These may get
* overriden below on a per-interface basis.
*/
opackets = ifnet.if_opackets;
ipackets = ifnet.if_ipackets;
obytes = ifnet.if_obytes;
ibytes = ifnet.if_ibytes;
oerrors = ifnet.if_oerrors;
ierrors = ifnet.if_ierrors;
collisions = ifnet.if_collisions;
timer = ifnet.if_timer;
drops = ifnet.if_snd.ifq_drops;
if (ifaddraddr == 0) {
if (Wflag)
printf("%-7.7s", name);
else
printf("%-5.5s", name);
printf(" %5lu ", ifnet.if_mtu);
printf("%-13.13s ", "none");
printf("%-17.17s ", "none");
} else {
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;
if (af != AF_UNSPEC && sa->sa_family != af) {
ifaddraddr =
(u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
continue;
}
if (Wflag)
printf("%-7.7s", name);
else
printf("%-5.5s", name);
printf(" %5lu ", ifnet.if_mtu);
switch (sa->sa_family) {
case AF_UNSPEC:
printf("%-13.13s ", "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("%-13.13s ", netname(in.s_addr,
ifaddr.in.ia_subnetmask));
#else
printf("%-13.13s ",
netname(htonl(ifaddr.in.ia_subnet),
ifaddr.in.ia_subnetmask));
#endif
printf("%-17.17s ",
routename(sin->sin_addr.s_addr));
network_layer = 1;
break;
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)sa;
printf("%-13.13s ",
netname6(&ifaddr.in6.ia_addr,
&ifaddr.in6.ia_prefixmask.sin6_addr));
printf("%-17.17s ",
inet_ntop(AF_INET6,
&sin6->sin6_addr,
ntop_buf, sizeof(ntop_buf)));
network_layer = 1;
break;
#endif /*INET6*/
case AF_IPX:
{
struct sockaddr_ipx *sipx =
(struct sockaddr_ipx *)sa;
u_long net;
char netnum[10];
*(union ipx_net *) &net = sipx->sipx_addr.x_net;
sprintf(netnum, "%lx", (u_long)ntohl(net));
printf("ipx:%-8s ", netnum);
/* printf("ipx:%-8s ", netname(net, 0L)); */
printf("%-17s ",
ipx_phost((struct sockaddr *)sipx));
}
network_layer = 1;
break;
case AF_APPLETALK:
printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
printf("%-11.11s ",atalk_print(sa,0x0b) );
break;
case AF_LINK:
{
struct sockaddr_dl *sdl =
(struct sockaddr_dl *)sa;
char linknum[10];
cp = (char *)LLADDR(sdl);
n = sdl->sdl_alen;
sprintf(linknum, "<Link#%d>", sdl->sdl_index);
m = printf("%-13.13s ", linknum);
}
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("%02x%c", *cp++ & 0xff,
n > 0 ? ':' : ' ');
m = 32 - m;
while (m-- > 0)
putchar(' ');
link_layer = 1;
break;
}
/*
* Fixup the statistics for interfaces that
* update stats for their network addresses
*/
if (network_layer) {
opackets = ifaddr.in.ia_ifa.if_opackets;
ipackets = ifaddr.in.ia_ifa.if_ipackets;
obytes = ifaddr.in.ia_ifa.if_obytes;
ibytes = ifaddr.in.ia_ifa.if_ibytes;
}
ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
}
show_stat("lu", 8, ipackets, link_layer|network_layer);
printf(" ");
show_stat("lu", 5, ierrors, link_layer);
printf(" ");
if (bflag) {
show_stat("lu", 10, ibytes, link_layer|network_layer);
printf(" ");
}
show_stat("lu", 8, opackets, link_layer|network_layer);
printf(" ");
show_stat("lu", 5, oerrors, link_layer);
printf(" ");
if (bflag) {
show_stat("lu", 10, obytes, link_layer|network_layer);
printf(" ");
}
show_stat("lu", 5, collisions, link_layer);
if (tflag) {
printf(" ");
show_stat("d", 3, timer, link_layer);
}
if (dflag) {
printf(" ");
show_stat("d", 3, drops, link_layer);
}
putchar('\n');
if (aflag && ifaddrfound) {
/*
* Print family's multicast addresses
*/
struct ifmultiaddr *multiaddr;
struct ifmultiaddr ifma;
union {
struct sockaddr sa;
struct sockaddr_in in;
#ifdef INET6
struct sockaddr_in6 in6;
#endif /* INET6 */
struct sockaddr_dl dl;
} msa;
const char *fmt;
TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
if (kread((u_long)multiaddr, (char *)&ifma,
sizeof ifma))
break;
multiaddr = &ifma;
if (kread((u_long)ifma.ifma_addr, (char *)&msa,
sizeof msa))
break;
if (msa.sa.sa_family != sa->sa_family)
continue;
fmt = 0;
switch (msa.sa.sa_family) {
case AF_INET:
fmt = routename(msa.in.sin_addr.s_addr);
break;
#ifdef INET6
case AF_INET6:
printf("%23s %-19.19s(refs: %d)\n", "",
inet_ntop(AF_INET6,
&msa.in6.sin6_addr,
ntop_buf,
sizeof(ntop_buf)),
ifma.ifma_refcount);
break;
#endif /* INET6 */
case AF_LINK:
switch (msa.dl.sdl_type) {
case IFT_ETHER:
case IFT_FDDI:
fmt = ether_ntoa(
(struct ether_addr *)
LLADDR(&msa.dl));
break;
}
break;
}
if (fmt)
printf("%23s %s\n", "", fmt);
}
}
}
}
struct iftot {
SLIST_ENTRY(iftot) chain;
char ift_name[IFNAMSIZ]; /* interface name */
u_long ift_ip; /* input packets */
u_long ift_ie; /* input errors */
u_long ift_op; /* output packets */
u_long ift_oe; /* output errors */
u_long ift_co; /* collisions */
u_int ift_dr; /* drops */
u_long ift_ib; /* input bytes */
u_long ift_ob; /* output bytes */
};
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.
* XXX - should be rewritten to use ifmib(4).
*/
static void
sidewaysintpr(unsigned interval1, u_long off)
{
struct ifnet ifnet;
u_long firstifnet;
struct ifnethead ifnethead;
struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
int line;
int oldmask, first;
u_long interesting_off;
if (kread(off, (char *)&ifnethead, sizeof ifnethead))
return;
firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
printf("malloc failed\n");
exit(1);
}
memset(iftot, 0, sizeof(struct iftot));
interesting = NULL;
interesting_off = 0;
for (off = firstifnet, ip = iftot; off;) {
char name[IFNAMSIZ];
if (kread(off, (char *)&ifnet, sizeof ifnet))
break;
strlcpy(name, ifnet.if_xname, sizeof(name));
if (interface && strcmp(name, interface) == 0) {
interesting = ip;
interesting_off = off;
}
snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);;
if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
printf("malloc failed\n");
exit(1);
}
memset(ipn, 0, sizeof(struct iftot));
SLIST_NEXT(ip, chain) = ipn;
ip = ipn;
off = (u_long)TAILQ_NEXT(&ifnet, if_link);
}
if ((total = malloc(sizeof(struct iftot))) == NULL) {
printf("malloc failed\n");
exit(1);
}
memset(total, 0, sizeof(struct iftot));
if ((sum = malloc(sizeof(struct iftot))) == NULL) {
printf("malloc failed\n");
exit(1);
}
memset(sum, 0, sizeof(struct iftot));
(void)signal(SIGALRM, catchalarm);
signalled = NO;
(void)alarm(interval1);
first = 1;
banner:
printf("%17s %14s %16s", "input",
interesting ? interesting->ift_name : "(Total)", "output");
putchar('\n');
printf("%10s %5s %10s %10s %5s %10s %5s",
"packets", "errs", "bytes", "packets", "errs", "bytes", "colls");
if (dflag)
printf(" %5.5s", "drops");
putchar('\n');
fflush(stdout);
line = 0;
loop:
if (interesting != NULL) {
ip = interesting;
if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
printf("???\n");
exit(1);
};
if (!first) {
printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
ifnet.if_ipackets - ip->ift_ip,
ifnet.if_ierrors - ip->ift_ie,
ifnet.if_ibytes - ip->ift_ib,
ifnet.if_opackets - ip->ift_op,
ifnet.if_oerrors - ip->ift_oe,
ifnet.if_obytes - ip->ift_ob,
ifnet.if_collisions - ip->ift_co);
if (dflag)
printf(" %5u", ifnet.if_snd.ifq_drops - ip->ift_dr);
}
ip->ift_ip = ifnet.if_ipackets;
ip->ift_ie = ifnet.if_ierrors;
ip->ift_ib = ifnet.if_ibytes;
ip->ift_op = ifnet.if_opackets;
ip->ift_oe = ifnet.if_oerrors;
ip->ift_ob = ifnet.if_obytes;
ip->ift_co = ifnet.if_collisions;
ip->ift_dr = ifnet.if_snd.ifq_drops;
} else {
sum->ift_ip = 0;
sum->ift_ie = 0;
sum->ift_ib = 0;
sum->ift_op = 0;
sum->ift_oe = 0;
sum->ift_ob = 0;
sum->ift_co = 0;
sum->ift_dr = 0;
for (off = firstifnet, ip = iftot;
off && SLIST_NEXT(ip, chain) != NULL;
ip = SLIST_NEXT(ip, chain)) {
if (kread(off, (char *)&ifnet, sizeof ifnet)) {
off = 0;
continue;
}
sum->ift_ip += ifnet.if_ipackets;
sum->ift_ie += ifnet.if_ierrors;
sum->ift_ib += ifnet.if_ibytes;
sum->ift_op += ifnet.if_opackets;
sum->ift_oe += ifnet.if_oerrors;
sum->ift_ob += ifnet.if_obytes;
sum->ift_co += ifnet.if_collisions;
sum->ift_dr += ifnet.if_snd.ifq_drops;
off = (u_long)TAILQ_NEXT(&ifnet, if_link);
}
if (!first) {
printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
sum->ift_ip - total->ift_ip,
sum->ift_ie - total->ift_ie,
sum->ift_ib - total->ift_ib,
sum->ift_op - total->ift_op,
sum->ift_oe - total->ift_oe,
sum->ift_ob - total->ift_ob,
sum->ift_co - total->ift_co);
if (dflag)
printf(" %5u", sum->ift_dr - total->ift_dr);
}
*total = *sum;
}
if (!first)
putchar('\n');
fflush(stdout);
oldmask = sigblock(sigmask(SIGALRM));
if (! signalled) {
sigpause(0);
}
sigsetmask(oldmask);
signalled = NO;
(void)alarm(interval1);
line++;
first = 0;
if (line == 21)
goto banner;
else
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(int signo __unused)
{
signalled = YES;
}