/* $NetBSD: if.c,v 1.109 2022/12/28 18:34:33 mrg 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 1.109 2022/12/28 18:34:33 mrg Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <kvm.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <err.h>
#include "netstat.h"
#include "rtutil.h"
#include "prog_ops.h"
#define MAXIF 100
#define HUMBUF_SIZE 7
struct iftot {
char ift_name[IFNAMSIZ]; /* interface name */
uint64_t ift_ip; /* input packets */
uint64_t ift_ib; /* input bytes */
uint64_t ift_ie; /* input errors */
uint64_t ift_iq; /* input drops */
uint64_t ift_op; /* output packets */
uint64_t ift_ob; /* output bytes */
uint64_t ift_oe; /* output errors */
uint64_t ift_oq; /* output drops */
uint64_t ift_co; /* collisions */
};
struct if_data_ext {
uint64_t ifi_oqdrops;
};
static void set_lines(void);
static void print_addr(const int, struct sockaddr *, struct sockaddr **,
struct if_data *, struct ifnet *, struct if_data_ext *);
static void sidewaysintpr(u_int, u_long);
static void iftot_banner(struct iftot *);
static void iftot_print_sum(struct iftot *, struct iftot *);
static void iftot_print(struct iftot *, struct iftot *);
static void catchalarm(int);
static void get_rtaddrs(int, struct sockaddr *, struct sockaddr **);
static void fetchifs(void);
static int if_data_ext_get(const char *, struct if_data_ext *);
static void intpr_sysctl(void);
static void intpr_kvm(u_long, void (*)(const char *));
struct iftot iftot[MAXIF], ip_cur, ip_old, sum_cur, sum_old;
static sig_atomic_t signalled; /* set when alarm goes off */
static unsigned redraw_lines = 21;
static void
set_lines(void)
{
static bool first = true;
struct ttysize ts;
if (!first)
return;
first = false;
if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ts) != -1 && ts.ts_lines)
redraw_lines = ts.ts_lines - 3;
}
/*
* Print a description of the network interfaces.
* NOTE: ifnetaddr is the location of the kernel global "ifnet",
* which is a TAILQ_HEAD.
*/
void
intpr(int interval, u_long ifnetaddr, void (*pfunc)(const char *))
{
if (interval) {
sidewaysintpr((unsigned)interval, ifnetaddr);
return;
}
if (use_sysctl)
intpr_sysctl();
else
intpr_kvm(ifnetaddr, pfunc);
}
static void
intpr_header(void)
{
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",
"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
if (dflag)
printf(" %6.6s", "Idrops");
printf(" %8.8s %5.5s %5.5s",
"Opkts", "Oerrs", "Colls");
}
if (dflag)
printf(" %6.6s", "Odrops");
if (tflag)
printf(" %4.4s", "Time");
putchar('\n');
}
}
int
if_data_ext_get(const char *ifname, struct if_data_ext *dext)
{
char namebuf[1024];
size_t len;
uint64_t drops;
/* For sysctl */
snprintf(namebuf, sizeof(namebuf),
"net.interfaces.%s.sndq.drops", ifname);
len = sizeof(drops);
if (sysctlbyname(namebuf, &drops, &len, NULL, 0) == -1) {
warn("%s", namebuf);
dext->ifi_oqdrops = 0;
return -1;
} else
dext->ifi_oqdrops = drops;
return 0;
}
static void
intpr_sysctl(void)
{
struct if_msghdr *ifm;
int mib[6] = { CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
static char *buf = NULL;
static size_t olen;
char *next, *lim, *cp;
struct rt_msghdr *rtm;
struct ifa_msghdr *ifam;
struct if_data *ifd = NULL;
struct sockaddr *sa, *rti_info[RTAX_MAX];
struct sockaddr_dl *sdl;
uint64_t total = 0;
size_t len;
int did = 1, rtax = 0, n;
char name[IFNAMSIZ + 1]; /* + 1 for `*' */
char origname[IFNAMSIZ]; /* without `*' */
int ifindex = 0;
if (prog_sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
err(1, "sysctl");
if (len > olen) {
free(buf);
if ((buf = malloc(len)) == NULL)
err(1, NULL);
olen = len;
}
if (prog_sysctl(mib, 6, buf, &len, NULL, 0) == -1)
err(1, "sysctl");
intpr_header();
lim = buf + len;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
struct if_data_ext dext;
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION)
continue;
switch (rtm->rtm_type) {
case RTM_IFINFO:
total = 0;
ifm = (struct if_msghdr *)next;
ifd = &ifm->ifm_data;
sa = (struct sockaddr *)(ifm + 1);
get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
sdl = (struct sockaddr_dl *)rti_info[RTAX_IFP];
if (sdl == NULL || sdl->sdl_family != AF_LINK)
continue;
bzero(name, sizeof(name));
if (sdl->sdl_nlen >= IFNAMSIZ)
memcpy(name, sdl->sdl_data, IFNAMSIZ - 1);
else if (sdl->sdl_nlen > 0)
memcpy(name, sdl->sdl_data, sdl->sdl_nlen);
if (interface != NULL && strcmp(name, interface) != 0)
continue;
ifindex = sdl->sdl_index;
/* Keep the original name */
strcpy(origname, name);
/* Mark inactive interfaces with a '*' */
cp = strchr(name, '\0');
if ((ifm->ifm_flags & IFF_UP) == 0) {
*cp++ = '*';
*cp = '\0';
}
if (qflag) {
total = ifd->ifi_ibytes + ifd->ifi_obytes +
ifd->ifi_ipackets + ifd->ifi_ierrors +
ifd->ifi_opackets + ifd->ifi_oerrors +
ifd->ifi_collisions;
if (dflag)
total += ifd->ifi_iqdrops;
if (total == 0)
continue;
}
/* Skip the first one */
if (did) {
did = 0;
continue;
}
rtax = RTAX_IFP;
break;
case RTM_NEWADDR:
if (qflag && total == 0)
continue;
if (interface != NULL && strcmp(name, interface) != 0)
continue;
ifam = (struct ifa_msghdr *)next;
if ((ifam->ifam_addrs & (RTA_NETMASK | RTA_IFA |
RTA_BRD)) == 0)
break;
sa = (struct sockaddr *)(ifam + 1);
get_rtaddrs(ifam->ifam_addrs, sa, rti_info);
rtax = RTAX_IFA;
did = 1;
break;
default:
continue;
}
if (vflag)
n = strlen(name) < 5 ? 5 : strlen(name);
else
n = 5;
printf("%-*.*s %-5" PRIu64 " ", n, n, name, ifd->ifi_mtu);
if (dflag)
if_data_ext_get(origname, &dext);
print_addr(ifindex, rti_info[rtax], rti_info, ifd,
NULL, dflag ? &dext : NULL);
}
}
union ifaddr_u {
struct ifaddr ifa;
struct in_ifaddr in;
#ifdef INET6
struct in6_ifaddr in6;
#endif /* INET6 */
};
static void
ifname_to_ifdata(int s, const char *ifname, struct if_data * const ifd)
{
struct ifdatareq ifdr;
memset(ifd, 0, sizeof(*ifd));
strlcpy(ifdr.ifdr_name, ifname, sizeof(ifdr.ifdr_name));
if (ioctl(s, SIOCGIFDATA, &ifdr) != 0)
return;
memcpy(ifd, &ifdr.ifdr_data, sizeof(ifdr.ifdr_data));
}
static void
intpr_kvm(u_long ifnetaddr, void (*pfunc)(const char *))
{
struct ifnet ifnet;
struct if_data ifd;
union ifaddr_u ifaddr;
u_long ifaddraddr;
struct ifnet_head ifhead; /* TAILQ_HEAD */
char name[IFNAMSIZ + 1]; /* + 1 for `*' */
int s;
if (ifnetaddr == 0) {
printf("ifnet: symbol not defined\n");
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 ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return;
intpr_header();
ifaddraddr = 0;
while (ifnetaddr || ifaddraddr) {
char *cp;
int n;
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 != NULL && 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 {
struct sockaddr *sa;
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;
ifname_to_ifdata(s, name, &ifd);
print_addr(ifnet.if_index, sa, (void *)&ifaddr,
&ifd, &ifnet, NULL);
}
ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next;
}
close(s);
}
static void
mc_print(const int ifindex, const size_t ias, const char *oid, int *mcast_oids,
void (*pr)(const void *))
{
uint8_t *mcast_addrs, *p;
const size_t incr = 2 * ias + sizeof(uint32_t);
size_t len;
if (mcast_oids[0] == 0) {
size_t oidlen = 4;
if (sysctlnametomib(oid, mcast_oids, &oidlen) == -1) {
warnx("'%s' not found", oid);
return;
}
if (oidlen != 3) {
warnx("Wrong OID path for '%s'", oid);
return;
}
}
if (mcast_oids[3] == ifindex)
return;
mcast_oids[3] = ifindex;
mcast_addrs = asysctl(mcast_oids, 4, &len);
if (mcast_addrs == NULL && len != 0) {
warn("failed to read '%s'", oid);
return;
}
if (len) {
p = mcast_addrs;
while (len >= incr) {
(*pr)((p + ias));
p += incr;
len -= incr;
}
}
free(mcast_addrs);
}
#ifdef INET6
static void
ia6_print(const struct in6_addr *ia)
{
struct sockaddr_in6 as6;
char hbuf[NI_MAXHOST]; /* for getnameinfo() */
int n;
memset(&as6, 0, sizeof(as6));
as6.sin6_len = sizeof(struct sockaddr_in6);
as6.sin6_family = AF_INET6;
as6.sin6_addr = *ia;
inet6_getscopeid(&as6, INET6_IS_ADDR_MC_LINKLOCAL);
if (getnameinfo((struct sockaddr *)&as6, as6.sin6_len, hbuf,
sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) {
strlcpy(hbuf, "??", sizeof(hbuf));
}
if (vflag)
n = strlen(hbuf) < 17 ? 17 : strlen(hbuf);
else
n = 17;
printf("\n%25s %-*.*s ", "", n, n, hbuf);
}
static void
mc6_print(const int ifindex)
{
static int mcast_oids[4];
mc_print(ifindex, sizeof(struct in6_addr), "net.inet6.multicast",
mcast_oids, (void (*)(const void *))ia6_print);
}
#endif
static void
ia4_print(const struct in_addr *ia)
{
printf("\n%25s %-17.17s ", "", routename4(ia->s_addr, nflag));
}
static void
mc4_print(const int ifindex)
{
static int mcast_oids[4];
mc_print(ifindex, sizeof(struct in_addr), "net.inet.multicast",
mcast_oids, (void (*)(const void *))ia4_print);
}
static void
print_addr(const int ifindex, struct sockaddr *sa, struct sockaddr **rtinfo,
struct if_data *ifd, struct ifnet *ifnet, struct if_data_ext *dext)
{
char hexsep = '.'; /* for hexprint */
static const char hexfmt[] = "%02x%c"; /* for hexprint */
char hbuf[NI_MAXHOST]; /* for getnameinfo() */
#ifdef INET6
const int niflag = NI_NUMERICHOST;
struct sockaddr_in6 *sin6, *netmask6;
#endif
struct sockaddr_in netmask;
struct sockaddr_in *sin;
char *cp;
int n, m;
switch (sa->sa_family) {
case AF_UNSPEC:
printf("%-13.13s ", "none");
printf("%-17.17s ", "none");
break;
case AF_INET:
sin = (struct sockaddr_in *)sa;
if (use_sysctl) {
netmask =
*((struct sockaddr_in *)rtinfo[RTAX_NETMASK]);
} else {
struct in_ifaddr *ifaddr_in = (void *)rtinfo;
netmask.sin_addr.s_addr = ifaddr_in->ia_subnetmask;
}
cp = netname4(sin, &netmask, nflag);
if (vflag)
n = strlen(cp) < 13 ? 13 : strlen(cp);
else
n = 13;
printf("%-*.*s ", n, n, cp);
cp = routename4(sin->sin_addr.s_addr, nflag);
if (vflag)
n = strlen(cp) < 17 ? 17 : strlen(cp);
else
n = 17;
printf("%-*.*s ", n, n, cp);
if (!aflag)
break;
if (ifnet) {
u_long multiaddr;
struct in_multi inm;
union ifaddr_u *ifaddr = (union ifaddr_u *)rtinfo;
multiaddr = (u_long)ifaddr->in.ia_multiaddrs.lh_first;
while (multiaddr != 0) {
kread(multiaddr, (char *)&inm, sizeof inm);
ia4_print(&inm.inm_addr);
multiaddr = (u_long)inm.inm_list.le_next;
}
} else
mc4_print(ifindex);
break;
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)sa;
inet6_getscopeid(sin6, INET6_IS_ADDR_LINKLOCAL);
#ifdef __KAME__
if (!vflag)
sin6->sin6_scope_id = 0;
#endif
if (use_sysctl)
netmask6 = (struct sockaddr_in6 *)rtinfo[RTAX_NETMASK];
else {
struct in6_ifaddr *ifaddr_in6 = (void *)rtinfo;
netmask6 = &ifaddr_in6->ia_prefixmask;
}
cp = netname6(sin6, netmask6, nflag);
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) {
strlcpy(hbuf, "?", sizeof(hbuf));
}
cp = hbuf;
if (vflag)
n = strlen(cp) < 17 ? 17 : strlen(cp);
else
n = 17;
printf("%-*.*s ", n, n, cp);
if (!aflag)
break;
if (ifnet) {
u_long multiaddr;
struct in6_multi inm;
union ifaddr_u *ifaddr = (union ifaddr_u *)rtinfo;
multiaddr = (u_long)ifaddr->in6._ia6_multiaddrs.lh_first;
while (multiaddr != 0) {
kread(multiaddr, (char *)&inm, sizeof inm);
ia6_print(&inm.in6m_addr);
multiaddr = (u_long)inm.in6m_entry.le_next;
}
} else
mc6_print(ifindex);
break;
#endif /*INET6*/
#ifndef SMALL
case AF_APPLETALK:
printf("atalk:%-7.7s ", atalk_print(sa, 0x10));
printf("%-17.17s ", atalk_print(sa, 0x0b));
break;
#endif
case AF_LINK:
printf("%-13.13s ", "<Link>");
if (getnameinfo(sa, sa->sa_len,
hbuf, sizeof(hbuf), NULL, 0,
NI_NUMERICHOST) != 0) {
strlcpy(hbuf, "?", sizeof(hbuf));
}
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;
}
if (bflag) {
char humbuf[HUMBUF_SIZE];
if (hflag && humanize_number(humbuf, sizeof(humbuf),
ifd->ifi_ibytes, "", HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf("%10s ", humbuf);
else
printf("%10llu ", (unsigned long long)ifd->ifi_ibytes);
if (hflag && humanize_number(humbuf, sizeof(humbuf),
ifd->ifi_obytes, "", HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf("%10s", humbuf);
else
printf("%10llu", (unsigned long long)ifd->ifi_obytes);
} else {
printf("%8llu %5llu",
(unsigned long long)ifd->ifi_ipackets,
(unsigned long long)ifd->ifi_ierrors);
if (dflag)
printf(" %6" PRIu64, ifd->ifi_iqdrops);
printf(" %8llu %5llu %5llu",
(unsigned long long)ifd->ifi_opackets,
(unsigned long long)ifd->ifi_oerrors,
(unsigned long long)ifd->ifi_collisions);
}
if (dflag)
printf(" %6" PRIu64, ifnet ?
ifnet->if_snd.ifq_drops : dext->ifi_oqdrops);
if (tflag)
printf(" %4d", ifnet ? ifnet->if_timer : 0);
putchar('\n');
}
static void
iftot_banner(struct iftot *ift)
{
if (bflag)
printf("%7.7s in %8.8s %6.6s out %5.5s",
ift->ift_name, " ",
ift->ift_name, " ");
else
printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
ift->ift_name, " ",
ift->ift_name, " ", " ");
if (dflag)
printf(" %5.5s", " ");
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", " ");
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 (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);
}
static void
iftot_print(struct iftot *cur, struct iftot *old)
{
if (bflag)
printf("%10" PRIu64 " %8.8s %10" PRIu64 " %5.5s",
cur->ift_ib - old->ift_ib, " ",
cur->ift_ob - old->ift_ob, " ");
else
printf("%8" PRIu64 " %5" PRIu64 " %8" PRIu64 " %5" PRIu64 " %5" PRIu64,
cur->ift_ip - old->ift_ip,
cur->ift_ie - old->ift_ie,
cur->ift_op - old->ift_op,
cur->ift_oe - old->ift_oe,
cur->ift_co - old->ift_co);
if (dflag)
printf(" %5" PRIu64, cur->ift_oq - old->ift_oq);
}
static void
iftot_print_sum(struct iftot *cur, struct iftot *old)
{
if (bflag)
printf(" %10" PRIu64 " %8.8s %10" PRIu64 " %5.5s",
cur->ift_ib - old->ift_ib, " ",
cur->ift_ob - old->ift_ob, " ");
else
printf(" %8" PRIu64 " %5" PRIu64 " %8" PRIu64 " %5" PRIu64 " %5" PRIu64,
cur->ift_ip - old->ift_ip,
cur->ift_ie - old->ift_ie,
cur->ift_op - old->ift_op,
cur->ift_oe - old->ift_oe,
cur->ift_co - old->ift_co);
if (dflag)
printf(" %5" PRIu64, cur->ift_oq - old->ift_oq);
}
__dead static void
sidewaysintpr_sysctl(unsigned interval)
{
struct itimerval it;
sigset_t emptyset;
sigset_t noalrm;
unsigned line;
set_lines();
fetchifs();
if (ip_cur.ift_name[0] == '\0') {
fprintf(stderr, "%s: %s: unknown interface\n",
getprogname(), interface);
exit(1);
}
sigemptyset(&emptyset);
sigemptyset(&noalrm);
sigaddset(&noalrm, SIGALRM);
sigprocmask(SIG_SETMASK, &noalrm, NULL);
signalled = 0;
(void)signal(SIGALRM, catchalarm);
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:
iftot_banner(&ip_cur);
line = 0;
bzero(&ip_old, sizeof(ip_old));
bzero(&sum_old, sizeof(sum_old));
loop:
bzero(&sum_cur, sizeof(sum_cur));
fetchifs();
iftot_print(&ip_cur, &ip_old);
ip_old = ip_cur;
iftot_print_sum(&sum_cur, &sum_old);
sum_old = sum_cur;
putchar('\n');
fflush(stdout);
line++;
if (signalled == 0)
sigsuspend(&emptyset);
signalled = 0;
if (line == redraw_lines)
goto banner;
goto loop;
/*NOTREACHED*/
}
static void
sidewaysintpr_kvm(unsigned interval, u_long off)
{
struct itimerval it;
sigset_t emptyset;
sigset_t noalrm;
struct ifnet ifnet;
struct if_data ifd;
u_long firstifnet;
struct iftot *ip, *total;
unsigned line;
struct iftot *lastif, *sum, *interesting;
struct ifnet_head ifhead; /* TAILQ_HEAD */
int s;
set_lines();
/*
* 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;
if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return;
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;
sigemptyset(&emptyset);
sigemptyset(&noalrm);
sigaddset(&noalrm, SIGALRM);
sigprocmask(SIG_SETMASK, &noalrm, NULL);
signalled = 0;
(void)signal(SIGALRM, catchalarm);
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_iq = 0;
ip->ift_op = 0;
ip->ift_ob = 0;
ip->ift_oe = 0;
ip->ift_oq = 0;
ip->ift_co = 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_iq = 0;
sum->ift_op = 0;
sum->ift_ob = 0;
sum->ift_oe = 0;
sum->ift_oq = 0;
sum->ift_co = 0;
for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
if (kread(off, (char *)&ifnet, sizeof ifnet)) {
off = 0;
continue;
}
ifname_to_ifdata(s, ip->ift_name, &ifd);
if (ip == interesting) {
if (bflag) {
char humbuf[HUMBUF_SIZE];
if (hflag && humanize_number(humbuf,
sizeof(humbuf),
ifd.ifi_ibytes - ip->ift_ib, "",
HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf("%10s %8.8s ", humbuf, " ");
else
printf("%10llu %8.8s ",
(unsigned long long)
(ifd.ifi_ibytes-ip->ift_ib), " ");
if (hflag && humanize_number(humbuf,
sizeof(humbuf),
ifd.ifi_obytes - ip->ift_ob, "",
HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf("%10s %5.5s", humbuf, " ");
else
printf("%10llu %5.5s",
(unsigned long long)
(ifd.ifi_obytes-ip->ift_ob), " ");
} else {
printf("%8llu %5llu %8llu %5llu %5llu",
(unsigned long long)
(ifd.ifi_ipackets - ip->ift_ip),
(unsigned long long)
(ifd.ifi_ierrors - ip->ift_ie),
(unsigned long long)
(ifd.ifi_opackets - ip->ift_op),
(unsigned long long)
(ifd.ifi_oerrors - ip->ift_oe),
(unsigned long long)
(ifd.ifi_collisions - ip->ift_co));
}
if (dflag)
printf(" %5" PRIu64,
ifnet.if_snd.ifq_drops - ip->ift_oq);
}
ip->ift_ip = ifd.ifi_ipackets;
ip->ift_ib = ifd.ifi_ibytes;
ip->ift_ie = ifd.ifi_ierrors;
ip->ift_op = ifd.ifi_opackets;
ip->ift_ob = ifd.ifi_obytes;
ip->ift_oe = ifd.ifi_oerrors;
ip->ift_co = ifd.ifi_collisions;
ip->ift_oq = 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_oq += ip->ift_oq;
off = (u_long)ifnet.if_list.tqe_next;
}
if (lastif - iftot > 0) {
if (bflag) {
char humbuf[HUMBUF_SIZE];
if (hflag && humanize_number(humbuf,
sizeof(humbuf), sum->ift_ib - total->ift_ib, "",
HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf(" %10s %8.8s ", humbuf, " ");
else
printf(" %10llu %8.8s ",
(unsigned long long)
(sum->ift_ib - total->ift_ib), " ");
if (hflag && humanize_number(humbuf,
sizeof(humbuf), sum->ift_ob - total->ift_ob, "",
HN_AUTOSCALE, HN_NOSPACE | HN_B) > 0)
printf("%10s %5.5s", humbuf, " ");
else
printf("%10llu %5.5s",
(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_oq - total->ift_oq));
}
*total = *sum;
putchar('\n');
fflush(stdout);
line++;
if (signalled == 0)
sigsuspend(&emptyset);
signalled = 0;
if (line == redraw_lines)
goto banner;
goto loop;
/*NOTREACHED*/
}
/*
* 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(unsigned int interval, u_long off)
{
if (use_sysctl)
sidewaysintpr_sysctl(interval);
else
sidewaysintpr_kvm(interval, off);
}
/*
* 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)
{
signalled = true;
}
static void
get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
{
int i;
for (i = 0; i < RTAX_MAX; i++) {
if (addrs & (1 << i)) {
rti_info[i] = sa;
sa = (struct sockaddr *)((char *)(sa) +
RT_ROUNDUP(sa->sa_len));
} else
rti_info[i] = NULL;
}
}
static void
fetchifs(void)
{
struct if_msghdr *ifm;
int mib[6] = { CTL_NET, AF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
struct rt_msghdr *rtm;
struct if_data *ifd = NULL;
struct sockaddr *sa, *rti_info[RTAX_MAX];
struct sockaddr_dl *sdl;
static char *buf = NULL;
static size_t olen;
struct if_data_ext dext;
char *next, *lim;
char name[IFNAMSIZ];
size_t len;
if (prog_sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
err(1, "sysctl");
if (len > olen) {
free(buf);
if ((buf = malloc(len)) == NULL)
err(1, NULL);
olen = len;
}
if (prog_sysctl(mib, 6, buf, &len, NULL, 0) == -1)
err(1, "sysctl");
memset(&dext, 0, sizeof(dext));
lim = buf + len;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION)
continue;
switch (rtm->rtm_type) {
case RTM_IFINFO:
ifm = (struct if_msghdr *)next;
ifd = &ifm->ifm_data;
sa = (struct sockaddr *)(ifm + 1);
get_rtaddrs(ifm->ifm_addrs, sa, rti_info);
sdl = (struct sockaddr_dl *)rti_info[RTAX_IFP];
if (sdl == NULL || sdl->sdl_family != AF_LINK)
continue;
bzero(name, sizeof(name));
if (sdl->sdl_nlen >= IFNAMSIZ)
memcpy(name, sdl->sdl_data, IFNAMSIZ - 1);
else if (sdl->sdl_nlen > 0)
memcpy(name, sdl->sdl_data, sdl->sdl_nlen);
if_data_ext_get(name, &dext);
if ((interface != NULL && !strcmp(name, interface)) ||
(interface == NULL &&
((ip_cur.ift_ib + ip_cur.ift_ob) == 0 ||
(ip_cur.ift_ib + ip_cur.ift_ob <
ifd->ifi_ibytes + ifd->ifi_obytes)))) {
strlcpy(ip_cur.ift_name, name,
sizeof(ip_cur.ift_name));
ip_cur.ift_ip = ifd->ifi_ipackets;
ip_cur.ift_ib = ifd->ifi_ibytes;
ip_cur.ift_ie = ifd->ifi_ierrors;
ip_cur.ift_op = ifd->ifi_opackets;
ip_cur.ift_ob = ifd->ifi_obytes;
ip_cur.ift_oe = ifd->ifi_oerrors;
ip_cur.ift_co = ifd->ifi_collisions;
ip_cur.ift_iq = ifd->ifi_iqdrops;
ip_cur.ift_oq = dext.ifi_oqdrops;
}
sum_cur.ift_ip += ifd->ifi_ipackets;
sum_cur.ift_ib += ifd->ifi_ibytes;
sum_cur.ift_ie += ifd->ifi_ierrors;
sum_cur.ift_op += ifd->ifi_opackets;
sum_cur.ift_ob += ifd->ifi_obytes;
sum_cur.ift_oe += ifd->ifi_oerrors;
sum_cur.ift_co += ifd->ifi_collisions;
sum_cur.ift_iq += ifd->ifi_iqdrops;
sum_cur.ift_oq += dext.ifi_oqdrops;
break;
}
}
/*
* If we picked an interface, be sure to keep using it for the rest
* of this instance.
*/
if (interface == NULL)
interface = ip_cur.ift_name;
}
