#ifndef ORIG
#include <sys/debug.h>
#include "bsd_only.h"
#endif
/*	$NetBSD: if.c,v 1.48 1998/12/10 15:10:48 christos Exp $	*/

/*
 * Copyright (c) 1980, 1986, 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.
 *
 *	@(#)if.c	8.5 (Berkeley) 1/9/95
 */

#include "opt_compat_linux.h"
#include "opt_compat_svr4.h"
#include "opt_compat_43.h"

#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/radix.h>

int	ifqmaxlen = IFQ_MAXLEN;
void	if_slowtimo __P((void *arg));

#ifndef ORIG
#include <sys/socket.h>
#include <netinet/in.h>

extern int errno;
void *if_slowtimo_timo = 0;
#endif

/*
 * Network interface utility routines.
 *
 * Routines with ifa_ifwith* names take sockaddr *'s as
 * parameters.
 */
void
ifinit()
{
	if_slowtimo_timo = (void *)new_timo();
	if_slowtimo(NULL);
}

int if_index = 0;
struct ifaddr **ifnet_addrs;

/*
 * Attach an interface to the
 * list of "active" interfaces.
 */
void
if_attach(ifp)
	struct ifnet *ifp;
{
	unsigned socksize, ifasize;
	int namelen, masklen;
	register struct sockaddr_dl *sdl;
	register struct ifaddr *ifa;
	static int if_indexlim = 8;

	if (if_index == 0)
		TAILQ_INIT(&ifnet);
	TAILQ_INIT(&ifp->if_addrlist);
	TAILQ_INSERT_TAIL(&ifnet, ifp, if_list);
	ifp->if_index = ++if_index;
	if (ifnet_addrs == 0 || if_index >= if_indexlim) {
		unsigned n = (if_indexlim <<= 1) * sizeof(ifa);
		struct ifaddr **q = (struct ifaddr **)
					malloc(n, M_IFADDR, M_WAITOK);
		if (ifnet_addrs) {
			bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
			free((caddr_t)ifnet_addrs, M_IFADDR);
		}
		ifnet_addrs = q;
	}
	/*
	 * create a Link Level name for this device
	 */
	namelen = strlen(ifp->if_xname);
	masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
	socksize = masklen + ifp->if_addrlen;
#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
	if (socksize < sizeof(*sdl))
		socksize = sizeof(*sdl);
	socksize = ROUNDUP(socksize);
	ifasize = sizeof(*ifa) + 2 * socksize;
	ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
	bzero((caddr_t)ifa, ifasize);
	sdl = (struct sockaddr_dl *)(ifa + 1);
	sdl->sdl_len = socksize;
	sdl->sdl_family = AF_LINK;
	bcopy(ifp->if_xname, sdl->sdl_data, namelen);
	sdl->sdl_nlen = namelen;
	sdl->sdl_index = ifp->if_index;
	sdl->sdl_type = ifp->if_type;
	ifnet_addrs[if_index - 1] = ifa;
	ifa->ifa_ifp = ifp;
	ifa->ifa_rtrequest = link_rtrequest;
	TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list);
	ifa->ifa_addr = (struct sockaddr *)sdl;
	ifp->if_sadl = sdl;
	sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
	ifa->ifa_netmask = (struct sockaddr *)sdl;
	sdl->sdl_len = masklen;
	while (namelen != 0)
		sdl->sdl_data[--namelen] = 0xff;
	if (ifp->if_snd.ifq_maxlen == 0)
	    ifp->if_snd.ifq_maxlen = ifqmaxlen;
	ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
}


#ifndef ORIG
/* TODO */
void
if_detach()
{
}
#endif

/*
 * Locate an interface based on a complete address.
 */
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithaddr(addr)
	register struct sockaddr *addr;
{
	register struct ifnet *ifp;
	register struct ifaddr *ifa;

#define	equal(a1, a2) \
  (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
	    for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
		if (ifa->ifa_addr->sa_family != addr->sa_family)
			continue;
		if (equal(addr, ifa->ifa_addr))
			return (ifa);
		if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
		    equal(ifa->ifa_broadaddr, addr))
			return (ifa);
	}
	dbg_printf("ifa_ifwithaddr: local net dev with <%s> not found\n",
			((struct sockaddr_in *)addr)->sin_addr.s_addr); 
	return ((struct ifaddr *)0);
}
/*
 * Locate the point to point interface with a given destination address.
 */
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithdstaddr(addr)
	register struct sockaddr *addr;
{
	register struct ifnet *ifp;
	register struct ifaddr *ifa;

	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
	    if (ifp->if_flags & IFF_POINTOPOINT)
		for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
			if (ifa->ifa_addr->sa_family != addr->sa_family ||
			    ifa->ifa_dstaddr == NULL)
				continue;
			if (equal(addr, ifa->ifa_dstaddr))
				return (ifa);
	}
	return ((struct ifaddr *)0);
}

/*
 * Find an interface on a specific network.  If many, choice
 * is most specific found.
 */
struct ifaddr *
ifa_ifwithnet(addr)
	struct sockaddr *addr;
{
	register struct ifnet *ifp;
	register struct ifaddr *ifa;
	struct ifaddr *ifa_maybe = 0;
	u_int af = addr->sa_family;
	char *addr_data = addr->sa_data, *cplim;

	if (af == AF_LINK) {
	    register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
	    if (sdl->sdl_index && sdl->sdl_index <= if_index)
		return (ifnet_addrs[sdl->sdl_index - 1]);
	}
	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
		for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
			register char *cp, *cp2, *cp3;

			if (ifa->ifa_addr->sa_family != af ||
			    ifa->ifa_netmask == 0)
				next: continue;
			cp = addr_data;
			cp2 = ifa->ifa_addr->sa_data;
			cp3 = ifa->ifa_netmask->sa_data;
			cplim = (char *)ifa->ifa_netmask +
				ifa->ifa_netmask->sa_len;
			while (cp3 < cplim)
				if ((*cp++ ^ *cp2++) & *cp3++)
				    /* want to continue for() loop */
					goto next;
			if (ifa_maybe == 0 ||
			    rn_refines((caddr_t)ifa->ifa_netmask,
			    (caddr_t)ifa_maybe->ifa_netmask))
				ifa_maybe = ifa;
		}
	return (ifa_maybe);
}
/*
 * Find the interface of the addresss.
 */
struct ifaddr *
ifa_ifwithladdr(addr)
	struct sockaddr *addr;
{
	struct ifaddr *ia;

	if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr))
	    || (ia = ifa_ifwithnet(addr)))
		return (ia);
	return (NULL);
}

/*
 * Find an interface using a specific address family
 */
struct ifaddr *
ifa_ifwithaf(af)
	register int af;
{
	register struct ifnet *ifp;
	register struct ifaddr *ifa;

	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
		for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next)
			if (ifa->ifa_addr->sa_family == af)
				return (ifa);
	return ((struct ifaddr *)0);
}

/*
 * Find an interface address specific to an interface best matching
 * a given address.
 */
struct ifaddr *
ifaof_ifpforaddr(addr, ifp)
	struct sockaddr *addr;
	register struct ifnet *ifp;
{
	register struct ifaddr *ifa;
	register char *cp, *cp2, *cp3;
	register char *cplim;
	struct ifaddr *ifa_maybe = 0;
	u_int af = addr->sa_family;

	if (af >= AF_MAX)
		return (0);
	for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
		if (ifa->ifa_addr->sa_family != af)
			continue;
		ifa_maybe = ifa;
		if (ifa->ifa_netmask == 0) {
			if (equal(addr, ifa->ifa_addr) ||
			    (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
				return (ifa);
			continue;
		}
		cp = addr->sa_data;
		cp2 = ifa->ifa_addr->sa_data;
		cp3 = ifa->ifa_netmask->sa_data;
		cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
		for (; cp3 < cplim; cp3++)
			if ((*cp++ ^ *cp2++) & *cp3)
				break;
		if (cp3 == cplim)
			return (ifa);
	}
	return (ifa_maybe);
}

#include <net/route.h>

/*
 * Default action when installing a route with a Link Level gateway.
 * Lookup an appropriate real ifa to point to.
 * This should be moved to /sys/net/link.c eventually.
 */
void
link_rtrequest(cmd, rt, sa)
	int cmd;
	register struct rtentry *rt;
	struct sockaddr *sa;
{
	register struct ifaddr *ifa;
	struct sockaddr *dst;
	struct ifnet *ifp;

	if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
	    ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
		return;
	if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) {
		IFAFREE(rt->rt_ifa);
		rt->rt_ifa = ifa;
		ifa->ifa_refcnt++;
		if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
			ifa->ifa_rtrequest(cmd, rt, sa);
	}
}

/*
 * Mark an interface down and notify protocols of
 * the transition.
 * NOTE: must be called at splsoftnet or equivalent.
 */
void
if_down(ifp)
	register struct ifnet *ifp;
{
	register struct ifaddr *ifa;

	ifp->if_flags &= ~IFF_UP;
	for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next)
		pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
	if_qflush(&ifp->if_snd);
	rt_ifmsg(ifp);
}

/*
 * Mark an interface up and notify protocols of
 * the transition.
 * NOTE: must be called at splsoftnet or equivalent.
 */
void
if_up(ifp)
	register struct ifnet *ifp;
{
#ifdef notyet
	register struct ifaddr *ifa;
#endif

	ifp->if_flags |= IFF_UP;
#ifdef notyet
	/* this has no effect on IP, and will kill all ISO connections XXX */
	for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
	     ifa = ifa->ifa_list.tqe_next)
		pfctlinput(PRC_IFUP, ifa->ifa_addr);
#endif
	rt_ifmsg(ifp);
}

/*
 * Flush an interface queue.
 */
void
if_qflush(ifq)
	register struct ifqueue *ifq;
{
	register struct mbuf *m, *n;

	n = ifq->ifq_head;
	while ((m = n) != NULL) {
		n = m->m_act;
		m_freem(m);
	}
	ifq->ifq_head = 0;
	ifq->ifq_tail = 0;
	ifq->ifq_len = 0;
}

/*
 * Handle interface watchdog timer routines.  Called
 * from softclock, we decrement timers (if set) and
 * call the appropriate interface routine on expiration.
 */
void
if_slowtimo(arg)
	void *arg;
{
	register struct ifnet *ifp;
	int s = splimp();

	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) {
		if (ifp->if_timer == 0 || --ifp->if_timer)
			continue;
		if (ifp->if_watchdog)
			(*ifp->if_watchdog)(ifp);
	}
	splx(s);
#ifdef ORIG
	timeout(if_slowtimo, NULL, hz / IFNET_SLOWHZ);
#else
	timeout(if_slowtimo, if_slowtimo_timo, NULL, hz / IFNET_SLOWHZ);
#endif
}

/*
 * Map interface name to
 * interface structure pointer.
 */
struct ifnet *
ifunit(name)
	register char *name;
{
	register struct ifnet *ifp;

	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
		if (strcmp(ifp->if_xname, name) == 0)
			return (ifp);

	return (NULL);
}

/*
 * Interface ioctls.
 */
int
ifioctl(so, cmd, data, p)
	struct socket *so;
	u_long cmd;
	caddr_t data;
	struct proc *p;
{
	register struct ifnet *ifp;
	register struct ifreq *ifr;
	int error;

	switch (cmd) {

	case SIOCGIFCONF:
	case OSIOCGIFCONF:
		return (ifconf(cmd, data));
	}
	ifr = (struct ifreq *)data;
	ifp = ifunit(ifr->ifr_name);
	if (ifp == 0)
		return (ENXIO);
	switch (cmd) {

	case SIOCGIFFLAGS:
		ifr->ifr_flags = ifp->if_flags;
		break;

	case SIOCGIFMETRIC:
		ifr->ifr_metric = ifp->if_metric;
		break;

	case SIOCGIFMTU:
		ifr->ifr_mtu = ifp->if_mtu;
		break;

	case SIOCSIFFLAGS:
#ifdef ORIG
		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
			return (error);
#endif
		if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
			int s = splimp();
			if_down(ifp);
			splx(s);
		}
		if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
			int s = splimp();
			if_up(ifp);
			splx(s);
		}
		ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
			(ifr->ifr_flags &~ IFF_CANTCHANGE);
		if (ifp->if_ioctl)
			(void) (*ifp->if_ioctl)(ifp, cmd, data);
		break;

	case SIOCSIFMETRIC:
#ifdef ORIG
		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
			return (error);
#endif
		ifp->if_metric = ifr->ifr_metric;
		break;

	case SIOCSIFMTU:
	case SIOCADDMULTI:
	case SIOCDELMULTI:
	case SIOCSIFMEDIA:
#ifdef ORIG
		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
			return (error);
#endif
		/* FALLTHROUGH */
	case SIOCGIFMEDIA:
		if (ifp->if_ioctl == 0)
			return (EOPNOTSUPP);
		return ((*ifp->if_ioctl)(ifp, cmd, data));

	case SIOCSDRVSPEC:  
		/* XXX:  need to pass proc pointer through to driver... */
#ifdef ORIG
		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
			return (error);
#endif
	/* FALLTHROUGH */
	default:
		if (so->so_proto == 0)
			return (EOPNOTSUPP);
#if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4)
		return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
		    (struct mbuf *)cmd, (struct mbuf *)data,
		    (struct mbuf *)ifp, p));
#else
	    {
		int ocmd = cmd;

		switch (cmd) {

		case SIOCSIFADDR:
		case SIOCSIFDSTADDR:
		case SIOCSIFBRDADDR:
		case SIOCSIFNETMASK:
#if BYTE_ORDER != BIG_ENDIAN
			if (ifr->ifr_addr.sa_family == 0 &&
			    ifr->ifr_addr.sa_len < 16) {
				ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
				ifr->ifr_addr.sa_len = 16;
			}
#else
			if (ifr->ifr_addr.sa_len == 0)
				ifr->ifr_addr.sa_len = 16;
#endif
			break;

		case OSIOCGIFADDR:
			cmd = SIOCGIFADDR;
			break;

		case OSIOCGIFDSTADDR:
			cmd = SIOCGIFDSTADDR;
			break;

		case OSIOCGIFBRDADDR:
			cmd = SIOCGIFBRDADDR;
			break;

		case OSIOCGIFNETMASK:
			cmd = SIOCGIFNETMASK;
		}
		error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
		    (struct mbuf *)cmd, (struct mbuf *)data,
		    (struct mbuf *)ifp, p));
		switch (ocmd) {

		case OSIOCGIFADDR:
		case OSIOCGIFDSTADDR:
		case OSIOCGIFBRDADDR:
		case OSIOCGIFNETMASK:
			*(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
		}
		return (error);

	    }
#endif
	}
	return (0);
}

/*
 * Return interface configuration
 * of system.  List may be used
 * in later ioctl's (above) to get
 * other information.
 */
/*ARGSUSED*/
int
ifconf(cmd, data)
	u_long cmd;
	caddr_t data;
{
	register struct ifconf *ifc = (struct ifconf *)data;
	register struct ifnet *ifp;
	register struct ifaddr *ifa;
	struct ifreq ifr, *ifrp;
	int space = ifc->ifc_len, error = 0;

	ifrp = ifc->ifc_req;
	for (ifp = ifnet.tqh_first;
	    space >= sizeof (ifr) && ifp != 0; ifp = ifp->if_list.tqe_next) {
		bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ);
		if ((ifa = ifp->if_addrlist.tqh_first) == 0) {
			bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
			error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
			    sizeof(ifr));
			if (error)
				break;
			space -= sizeof (ifr), ifrp++;
		} else 
		    for (; space >= sizeof (ifr) && ifa != 0; ifa = ifa->ifa_list.tqe_next) {
			register struct sockaddr *sa = ifa->ifa_addr;
#if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4)
			if (cmd == OSIOCGIFCONF) {
				struct osockaddr *osa =
					 (struct osockaddr *)&ifr.ifr_addr;
				ifr.ifr_addr = *sa;
				osa->sa_family = sa->sa_family;
				error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
						sizeof (ifr));
				ifrp++;
			} else
#endif
			if (sa->sa_len <= sizeof(*sa)) {
				ifr.ifr_addr = *sa;
				error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
						sizeof (ifr));
				ifrp++;
			} else {
				space -= sa->sa_len - sizeof(*sa);
				if (space < sizeof (ifr))
					break;
				error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
						sizeof (ifr.ifr_name));
				if (error == 0)
				    error = copyout((caddr_t)sa,
				      (caddr_t)&ifrp->ifr_addr, sa->sa_len);
				ifrp = (struct ifreq *)
					(sa->sa_len + (caddr_t)&ifrp->ifr_addr);
			}
			if (error)
				break;
			space -= sizeof (ifr);
		}
	}
	ifc->ifc_len -= space;
	return (error);
}


#ifndef ORIG

void
ifconfig_cmd(char *dev, int cmd, unsigned int val)
{
	int ret;
	struct ifreq ifr;
	struct ifnet *ifp;
	int s;

	ifp = ifunit(dev);
	if (!ifp) {
		printf("ifconfig_cmd: bad net interface name <%s>\n",dev);
		return;
	}
	
	bzero((char*) &ifr, sizeof(ifr));
	strcpy(ifr.ifr_name, dev);
	ifr.ifr_addr.sa_family = AF_INET;	/* XXX */
	switch (cmd) {
	case SIOCSIFFLAGS:
		ifr.ifr_flags = val;
		break;

	case SIOCSIFMETRIC:
		ifr.ifr_metric = val;
		break;

	default:
		((struct sockaddr_in *)&ifr.ifr_addr)->sin_len = 16; /* XXX */
		((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = val;
	}

	s = socket(AF_INET, SOCK_DGRAM, 0);
	if (s < 0) {
		printf("ifconfig_cmd: can't get a socket, errno 0x%x\n",errno);
		close(s);
		return;
	}
	ret = ioctl(s, cmd, &ifr);
	if (ret < 0) {
		printf("ifconfig_cmd: ioctl fails errno 0x%x\n",errno);
		close(s);
		return;
	}
	close(s);
}

void
ifconfig(char *dev, char *cmd, unsigned int val)
{
	register struct ifnet *ifp;
	register struct ifaddr *ifa;
	int error = 0;

	if (dev) {
		ifp = ifunit(dev);
		if (!ifp) {
			printf("ifconfig: bad net interface name <%s>\n",dev);
			return;
		}
	}
	

	if (dev && cmd) {
		if (strcmp(cmd, "addr")== 0)
			ifconfig_cmd(dev, SIOCSIFADDR, val);
		else if (strcmp(cmd, "broad")== 0)
			ifconfig_cmd(dev, SIOCSIFBRDADDR, val);
		else if (strcmp(cmd, "mask")==0)
			ifconfig_cmd(dev, SIOCSIFNETMASK, val);
		else if (strcmp(cmd, "dst")==0)
			ifconfig_cmd(dev, SIOCSIFDSTADDR, val);
		else if (strcmp(cmd, "up")==0)
			ifconfig_cmd(dev, SIOCSIFFLAGS, IFF_UP);
		else if (strcmp(cmd, "down")==0)
			ifconfig_cmd(dev, SIOCSIFFLAGS, ~IFF_UP);
		else if (strcmp(cmd, "metric")==0)
			ifconfig_cmd(dev, SIOCSIFMETRIC, val);

		return;
	}

	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) {
		if (dev && strcmp(dev, ifp->if_xname) != 0)
			continue;

		printf("Network device %s information:\n", ifp->if_xname);
		printf("\tflags 0x%x mtu %d\n", ifp->if_flags & 0xffff, ifp->if_mtu);
		printf("\t [ ");
		if (ifp->if_flags & IFF_UP)
			printf(" up");
		else
			printf(" down");
		if (ifp->if_flags & IFF_RUNNING)
			printf(" running");
		if (ifp->if_flags & IFF_BROADCAST)
			printf(" broadcast");
		if (ifp->if_flags & IFF_LOOPBACK)
			printf(" loopback");
		if (ifp->if_flags & IFF_POINTOPOINT)
			printf(" point-to-point");
		if (ifp->if_flags & IFF_NOARP)
			printf(" noarp");
		if (ifp->if_flags & IFF_NOTRAILERS)
			printf(" notrailers");
		if (ifp->if_flags & IFF_SIMPLEX)
			printf(" simplex");
		if (ifp->if_flags & IFF_MULTICAST)
			printf(" multicast");
		if (ifp->if_flags & IFF_DEBUG)
			printf(" debug");
		printf(" ] \n");
		printf("\tipackets %d opackets %d ierrors %d oerrors %d\n",
			ifp->if_ipackets, ifp->if_opackets, ifp->if_ierrors, ifp->if_oerrors);
		printf("\tibytes %d obytes %d iqdrops %d noproto %d\n",
			ifp->if_ibytes, ifp->if_obytes, ifp->if_iqdrops, ifp->if_noproto);
		printf("\tcollisions %d imcasts %d omcasts %d\n",
			ifp->if_collisions, ifp->if_imcasts, ifp->if_omcasts);

		printf("\taddrs ");
		for (ifa = ifp->if_addrlist.tqh_first; 
			ifa != 0; ifa = ifa->ifa_list.tqe_next) {
			register struct sockaddr_in *sin = (struct sockaddr_in*)ifa->ifa_addr;

			if (!sin)
				break;
			if (sin->sin_family != AF_INET)
				continue;
			printf(" %s", inet_ntoa(sin->sin_addr));
			sin = (struct sockaddr_in *)ifa->ifa_netmask;
			if (sin) 
				printf(" [mask %s]", inet_ntoa(sin->sin_addr));
			if (ifp->if_flags & IFF_BROADCAST) {
				sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
				if (sin) 
					printf(" [broadcast %s]", inet_ntoa(sin->sin_addr));
			}
			if (ifp->if_flags & IFF_POINTOPOINT) {
				sin = (struct sockaddr_in *)ifa->ifa_dstaddr;
				if (sin) 
					printf(" [point-to-point %s]", inet_ntoa(sin->sin_addr));
			}
		}
		printf("\n");
	}
}
#endif