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Replace <sys/param.h> with <limits.h> and other less dirty headers where
possible.  Annotate <sys/param.h> lines with their current reasons.  Switch
to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1, LOGIN_NAME_MAX, etc.  Change
MIN() and MAX() to local definitions of MINIMUM() and MAXIMUM() where
sensible to avoid pulling in the pollution.  These are the files confirmed
through binary verification.
ok guenther, millert, doug (helped with the verification protocol)

/*	$OpenBSD: if.c,v 1.70 2015/01/16 06:40:09 deraadt Exp $	*/
/*	$NetBSD: if.c,v 1.16.4.2 1996/06/07 21:46:46 thorpej 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/param.h>	/* roundup() */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/sysctl.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 <netinet/if_ether.h>
#include <arpa/inet.h>

#include <err.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>

#include "netstat.h"

static void print_addr(struct sockaddr *, struct sockaddr **, struct if_data *);
static void sidewaysintpr(u_int, int);
static void catchalarm(int);
static void get_rtaddrs(int, struct sockaddr *, struct sockaddr **);
static void fetchifs(void);

/*
 * 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, int repeatcount)
{
	struct if_msghdr ifm;
	int mib[6] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
	char name[IFNAMSIZ + 1];	/* + 1 for the '*' */
	char *buf, *next, *lim, *cp;
	struct rt_msghdr *rtm;
	struct ifa_msghdr *ifam;
	struct if_data *ifd;
	struct sockaddr *sa, *rti_info[RTAX_MAX];
	struct sockaddr_dl *sdl;
	u_int64_t total = 0;
	size_t len;

	if (interval) {
		sidewaysintpr((unsigned)interval, repeatcount);
		return;
	}

	if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
		err(1, "sysctl");
	if ((buf = malloc(len)) == NULL)
		err(1, NULL);
	if (sysctl(mib, 6, buf, &len, NULL, 0) == -1)
		err(1, "sysctl");

	printf("%-7.7s %-5.5s %-11.11s %-17.17s ",
	    "Name", "Mtu", "Network", "Address");
	if (bflag)
		printf("%10.10s %10.10s", "Ibytes", "Obytes");
	else
		printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
		    "Ipkts", "Ierrs", "Opkts", "Oerrs", "Colls");
	if (tflag)
		printf(" %s", "Time");
	if (dflag)
		printf(" %s", "Drop");
	putchar('\n');

	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:
			total = 0;
			bcopy(next, &ifm, sizeof ifm);
			ifd = &ifm.ifm_data;

			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
			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 != 0 && strcmp(name, interface) != 0)
				continue;

			/* 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 (tflag)
					total += 0; // XXX ifnet.if_timer;
				if (dflag)
					total += 0; // XXX ifnet.if_snd.ifq_drops;
				if (total == 0)
					continue;
			}

			printf("%-7s %-5d ", name, ifd->ifi_mtu);
			print_addr(rti_info[RTAX_IFP], rti_info, ifd);
			break;
		case RTM_NEWADDR:
			if (qflag && total == 0)
				continue;
			if (interface != 0 && 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 *)(next + rtm->rtm_hdrlen);
			get_rtaddrs(ifam->ifam_addrs, sa, rti_info);

			printf("%-7s %-5d ", name, ifd->ifi_mtu);
			print_addr(rti_info[RTAX_IFA], rti_info, ifd);
			break;
		}
	}
	free(buf);
}

static void
print_addr(struct sockaddr *sa, struct sockaddr **rtinfo, struct if_data *ifd)
{
	struct sockaddr_dl *sdl;
	struct sockaddr_in *sin;
	struct sockaddr_in6 *sin6;
	char *cp;
	int m, n;

	switch (sa->sa_family) {
	case AF_UNSPEC:
		printf("%-11.11s ", "none");
		printf("%-17.17s ", "none");
		break;
	case AF_INET:
		sin = (struct sockaddr_in *)sa;
		cp = netname4(sin->sin_addr.s_addr,
		    ((struct sockaddr_in *)rtinfo[RTAX_NETMASK])->sin_addr.s_addr);
		if (vflag)
			n = strlen(cp) < 11 ? 11 : strlen(cp);
		else
			n = 11;
		printf("%-*.*s ", n, n, cp);
		cp = routename4(sin->sin_addr.s_addr);
		if (vflag)
			n = strlen(cp) < 17 ? 17 : strlen(cp);
		else
			n = 17;
		printf("%-*.*s ", n, n, cp);

#if 0
		if (aflag) {
			u_long multiaddr;
			struct in_multi inm;

			multiaddr = (u_long)LIST_FIRST(&ifaddr.in.ia_multiaddrs);
			while (multiaddr != 0) {
				kread(multiaddr, &inm, sizeof inm);
				printf("\n%25s %-17.17s ", "",
				    routename4(inm.inm_addr.s_addr));
				multiaddr = (u_long)LIST_NEXT(&inm, inm_list);
			}
		}
#endif
		break;
	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]);
			sin6->sin6_addr.s6_addr[2] = 0;
			sin6->sin6_addr.s6_addr[3] = 0;
		}
#endif
		cp = netname6(sin6,
		    (struct sockaddr_in6 *)rtinfo[RTAX_NETMASK]);
		if (vflag)
			n = strlen(cp) < 11 ? 11 : strlen(cp);
		else
			n = 11;
		printf("%-*.*s ", n, n, cp);
		cp = routename6(sin6);
		if (vflag)
			n = strlen(cp) < 17 ? 17 : strlen(cp);
		else
			n = 17;
		printf("%-*.*s ", n, n, cp);
#if 0
		if (aflag) {
			u_long multiaddr;
			struct in6_multi inm;
			struct sockaddr_in6 m6;

			multiaddr = (u_long)LIST_FIRST(&ifaddr.in6.ia6_multiaddrs);
			while (multiaddr != 0) {
				kread(multiaddr, &inm, sizeof inm);
				memset(&m6, 0, sizeof(m6));
				m6.sin6_len = sizeof(struct sockaddr_in6);
				m6.sin6_family = AF_INET6;
				m6.sin6_addr = inm.in6m_addr;
#ifdef __KAME__
				if (IN6_IS_ADDR_MC_LINKLOCAL(&m6.sin6_addr) ||
				    IN6_IS_ADDR_MC_INTFACELOCAL(&m6.sin6_addr)) {
					m6.sin6_scope_id =
					    ntohs(*(u_int16_t *)
					    &m6.sin6_addr.s6_addr[2]);
					m6.sin6_addr.s6_addr[2] = 0;
					m6.sin6_addr.s6_addr[3] = 0;
				}
#endif
				cp = routename6(&m6);
				if (vflag)
					n = strlen(cp) < 17 ? 17 : strlen(cp);
				else
					n = 17;
				printf("\n%25s %-*.*s ", "",
				    n, n, cp);
				multiaddr = (u_long)LIST_NEXT(&inm, in6m_entry);
			}
		}
#endif
		break;
	case AF_LINK:
		sdl = (struct sockaddr_dl *)sa;
		m = printf("%-11.11s ", "<Link>");
		if (sdl->sdl_type == IFT_ETHER ||
		    sdl->sdl_type == IFT_CARP ||
		    sdl->sdl_type == IFT_FDDI ||
		    sdl->sdl_type == IFT_ISO88025)
			printf("%-17.17s ",
			    ether_ntoa((struct ether_addr *)LLADDR(sdl)));
		else {
			cp = (char *)LLADDR(sdl);
			n = sdl->sdl_alen;
			goto hexprint;
		}
		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;
hexprint:
		while (--n >= 0)
			m += printf("%x%c", *cp++ & 0xff,
				    n > 0 ? '.' : ' ');
		m = 30 - m;
		while (m-- > 0)
			putchar(' ');
		break;
	}
	if (bflag) {
		if (hflag) {
			char ibytes[FMT_SCALED_STRSIZE];
			char obytes[FMT_SCALED_STRSIZE];
			fmt_scaled(ifd->ifi_ibytes, ibytes);
			fmt_scaled(ifd->ifi_obytes, obytes);
			printf("%10s %10s", ibytes, obytes);
		} else
			printf("%10llu %10llu",
			    ifd->ifi_ibytes, ifd->ifi_obytes);
	} else
		printf("%8llu %5llu %8llu %5llu %5llu",
		    ifd->ifi_ipackets, ifd->ifi_ierrors,
		    ifd->ifi_opackets, ifd->ifi_oerrors,
		    ifd->ifi_collisions);
	if (tflag)
		printf(" %4d", 0 /* XXX ifnet.if_timer */);
	if (dflag)
		printf(" %4d", 0 /* XXX ifnet.if_snd.ifq_drops */);
	putchar('\n');
}

struct	iftot {
	char	ift_name[IFNAMSIZ];	/* interface name */
	u_int64_t ift_ip;		/* input packets */
	u_int64_t ift_ib;		/* input bytes */
	u_int64_t ift_ie;		/* input errors */
	u_int64_t ift_op;		/* output packets */
	u_int64_t ift_ob;		/* output bytes */
	u_int64_t ift_oe;		/* output errors */
	u_int64_t ift_co;		/* collisions */
	u_int64_t ift_dr;		/* drops */
} ip_cur, ip_old, sum_cur, sum_old;

volatile sig_atomic_t 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(unsigned int interval, int repeatcount)
{
	sigset_t emptyset;
	int line;
	char ibytes[FMT_SCALED_STRSIZE];
	char obytes[FMT_SCALED_STRSIZE];

	fetchifs();
	if (ip_cur.ift_name[0] == '\0') {
		fprintf(stderr, "%s: %s: unknown interface\n",
		    __progname, interface);
		exit(1);
	}

	(void)signal(SIGALRM, catchalarm);
	signalled = 0;
	(void)alarm(interval);
banner:
	if (bflag)
		printf("%7.7s in %8.8s %6.6s out %5.5s",
		    ip_cur.ift_name, " ",
		    ip_cur.ift_name, " ");
	else
		printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
		    ip_cur.ift_name, " ",
		    ip_cur.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);
	line = 0;
	bzero(&ip_old, sizeof(ip_old));
	bzero(&sum_old, sizeof(sum_old));
loop:
	bzero(&sum_cur, sizeof(sum_cur));

	fetchifs();

	if (bflag) {
		if (hflag) {
			fmt_scaled(ip_cur.ift_ib - ip_old.ift_ib, ibytes);
			fmt_scaled(ip_cur.ift_ob - ip_old.ift_ob, obytes);
			printf("%10s %8.8s %10s %5.5s",
			    ibytes, " ", obytes, " ");
		} else
			printf("%10llu %8.8s %10llu %5.5s",
			    ip_cur.ift_ib - ip_old.ift_ib, " ",
			    ip_cur.ift_ob - ip_old.ift_ob, " ");
	} else
		printf("%8llu %5llu %8llu %5llu %5llu",
		    ip_cur.ift_ip - ip_old.ift_ip,
		    ip_cur.ift_ie - ip_old.ift_ie,
		    ip_cur.ift_op - ip_old.ift_op,
		    ip_cur.ift_oe - ip_old.ift_oe,
		    ip_cur.ift_co - ip_old.ift_co);
	if (dflag)
		printf(" %5llu",
		    /* XXX ifnet.if_snd.ifq_drops - ip->ift_dr); */
		    0LL);

	ip_old = ip_cur;

	if (bflag) {
		if (hflag) {
			fmt_scaled(sum_cur.ift_ib - sum_old.ift_ib, ibytes);
			fmt_scaled(sum_cur.ift_ob - sum_old.ift_ob, obytes);
			printf("  %10s %8.8s %10s %5.5s",
			    ibytes, " ", obytes, " ");
		} else
			printf("  %10llu %8.8s %10llu %5.5s",
			    sum_cur.ift_ib - sum_old.ift_ib, " ",
			    sum_cur.ift_ob - sum_old.ift_ob, " ");
	} else
		printf("  %8llu %5llu %8llu %5llu %5llu",
		    sum_cur.ift_ip - sum_old.ift_ip,
		    sum_cur.ift_ie - sum_old.ift_ie,
		    sum_cur.ift_op - sum_old.ift_op,
		    sum_cur.ift_oe - sum_old.ift_oe,
		    sum_cur.ift_co - sum_old.ift_co);
	if (dflag)
		printf(" %5llu", sum_cur.ift_dr - sum_old.ift_dr);

	sum_old = sum_cur;

	putchar('\n');
	fflush(stdout);
	if (repeatcount && --repeatcount == 0)
		return;
	line++;
	sigemptyset(&emptyset);
	if (!signalled)
		sigsuspend(&emptyset);
	signalled = 0;
	(void)alarm(interval);
	if (line == 21 && isatty(STDOUT_FILENO))
		goto banner;
	goto loop;
}

/*
 * Called if an interval expires before sidewaysintpr has completed a loop.
 * Sets a flag to not wait for the alarm.
 */
/* ARGSUSED */
static void
catchalarm(int signo)
{
	signalled = 1;
}

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) +
			    roundup(sa->sa_len, sizeof(long)));
		} else 
			rti_info[i] = NULL;
	}
}


static int
isegress(char *name)
{
	static int s = -1;
	int len;
	struct ifgroupreq ifgr;
	struct ifg_req *ifg;
	int rv = 0;

	if (s == -1) {
		if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
			return 0;
	}

	memset(&ifgr, 0, sizeof(ifgr));
	strlcpy(ifgr.ifgr_name, name, IFNAMSIZ);

	if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
		return 0;
	}

	len = ifgr.ifgr_len;
	ifgr.ifgr_groups = calloc(len, 1);
	if (ifgr.ifgr_groups == NULL)
		err(1, "getifgroups");
	if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
		err(1, "SIOCGIFGROUP");

	ifg = ifgr.ifgr_groups;
	for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
		len -= sizeof(struct ifg_req);
		if (strcmp(ifg->ifgrq_group, IFG_EGRESS) == 0)
			rv = 1;
	}

	free(ifgr.ifgr_groups);
	return rv;
}

static void
fetchifs(void)
{
	struct if_msghdr ifm;
	int mib[6] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
	struct rt_msghdr *rtm;
	struct if_data *ifd;
	struct sockaddr *sa, *rti_info[RTAX_MAX];
	struct sockaddr_dl *sdl;
	char *buf, *next, *lim;
	char name[IFNAMSIZ];
	size_t len;
	int takeit = 0;
	int foundone = 0;

	if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
		err(1, "sysctl");
	if ((buf = malloc(len)) == NULL)
		err(1, NULL);
	if (sysctl(mib, 6, buf, &len, NULL, 0) == -1)
		err(1, "sysctl");

	memset(&ip_cur, 0, sizeof(ip_cur));
	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:
			bcopy(next, &ifm, sizeof ifm);
			ifd = &ifm.ifm_data;

			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
			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)) {
				takeit = 1;
			} else if (interface == NULL && foundone == 0 &&
			    isegress(name)) {
				takeit = 1;
				foundone = 1;
			} else
				takeit = 0;
			if (takeit) {
				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_dr = 0;
				    /* XXX ifnet.if_snd.ifq_drops */
			}

			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_dr += 0; /* XXX ifnet.if_snd.ifq_drops */
			break;
		}
	}
	if (interface == NULL && foundone == 0) {
		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_dr = 0;
		    /* XXX ifnet.if_snd.ifq_drops */
	}
	free(buf);
}