[unix-history] / sys / netns / ns.c

/*
 * Copyright (c) 1984, 1985, 1986, 1987 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.
 *
 *	from: @(#)ns.c	7.8 (Berkeley) 6/27/91
 *	$Id: ns.c,v 1.3 1993/11/07 17:50:23 wollman Exp $
 */

#include "param.h"
#include "mbuf.h"
#include "ioctl.h"
#include "protosw.h"
#include "errno.h"
#include "socket.h"
#include "socketvar.h"


#include "../net/if.h"
#include "../net/route.h"

#include "ns.h"
#include "ns_if.h"

#ifdef NS

static void ns_ifscrub(struct ifnet *, struct ns_ifaddr *);

struct ns_ifaddr *ns_ifaddr;
struct ifqueue nsintrq;

int ns_interfaces;
extern struct sockaddr_ns ns_netmask, ns_hostmask;
union ns_host ns_thishost;
union ns_host ns_zerohost;
union ns_host ns_braodhost;
union ns_net ns_zeronet;
union ns_net ns_broadnet;

/*
 * Generic internet control operations (ioctl's).
 */
/* ARGSUSED */
int
ns_control(so, cmd, data, ifp)
	struct socket *so;
	int cmd;
	caddr_t data;
	register struct ifnet *ifp;
{
	register struct ifreq *ifr = (struct ifreq *)data;
	register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
	register struct ns_ifaddr *ia;
	struct ifaddr *ifa;
	struct ns_ifaddr *oia;
	struct mbuf *m;
	int error, dstIsNew, hostIsNew;

	/*
	 * Find address for this interface, if it exists.
	 */
	if (ifp == 0)
		return (EADDRNOTAVAIL);
	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
		if (ia->ia_ifp == ifp)
			break;

	switch (cmd) {

	case SIOCGIFADDR:
		if (ia == (struct ns_ifaddr *)0)
			return (EADDRNOTAVAIL);
		*(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
		return (0);


	case SIOCGIFBRDADDR:
		if (ia == (struct ns_ifaddr *)0)
			return (EADDRNOTAVAIL);
		if ((ifp->if_flags & IFF_BROADCAST) == 0)
			return (EINVAL);
		*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
		return (0);

	case SIOCGIFDSTADDR:
		if (ia == (struct ns_ifaddr *)0)
			return (EADDRNOTAVAIL);
		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
			return (EINVAL);
		*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
		return (0);
	}

	if ((so->so_state & SS_PRIV) == 0)
		return (EPERM);

	switch (cmd) {
	case SIOCAIFADDR:
	case SIOCDIFADDR:
		if (ifra->ifra_addr.sns_family == AF_NS)
		    for (oia = ia; ia; ia = ia->ia_next) {
			if (ia->ia_ifp == ifp  &&
			    ns_neteq(ia->ia_addr.sns_addr,
				  ifra->ifra_addr.sns_addr))
			    break;
		    }
		if (cmd == SIOCDIFADDR && ia == 0)
			return (EADDRNOTAVAIL);
		/* FALLTHROUGH */

	case SIOCSIFADDR:
	case SIOCSIFDSTADDR:
		if (ia == (struct ns_ifaddr *)0) {
			m = m_getclr(M_WAIT, MT_IFADDR);
			if (m == (struct mbuf *)NULL)
				return (ENOBUFS);
			if (ia = ns_ifaddr) {
				for ( ; ia->ia_next; ia = ia->ia_next)
					;
				ia->ia_next = mtod(m, struct ns_ifaddr *);
			} else
				ns_ifaddr = mtod(m, struct ns_ifaddr *);
			ia = mtod(m, struct ns_ifaddr *);
			if (ifa = ifp->if_addrlist) {
				for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
					;
				ifa->ifa_next = (struct ifaddr *) ia;
			} else
				ifp->if_addrlist = (struct ifaddr *) ia;
			ia->ia_ifp = ifp;
			ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;

			ia->ia_ifa.ifa_netmask =
				(struct sockaddr *)&ns_netmask;

			ia->ia_ifa.ifa_dstaddr =
				(struct sockaddr *)&ia->ia_dstaddr;
			if (ifp->if_flags & IFF_BROADCAST) {
				ia->ia_broadaddr.sns_family = AF_NS;
				ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
				ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
			}
			ns_interfaces++;
		}
	}

	switch (cmd) {
		int error;

	case SIOCSIFDSTADDR:
		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
			return (EINVAL);
		if (ia->ia_flags & IFA_ROUTE) {
			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
			ia->ia_flags &= ~IFA_ROUTE;
		}
		if (ifp->if_ioctl) {
			error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 
						 (caddr_t)ia);
			if (error)
				return (error);
		}
		*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
		return (0);

	case SIOCSIFADDR:
		return (ns_ifinit(ifp, ia,
				(struct sockaddr_ns *)&ifr->ifr_addr, 1));

	case SIOCDIFADDR:
		error = 0;
		ns_ifscrub(ifp, ia);
		if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
			ifp->if_addrlist = ifa->ifa_next;
		else {
			while (ifa->ifa_next &&
			       (ifa->ifa_next != (struct ifaddr *)ia))
				    ifa = ifa->ifa_next;
			if (ifa->ifa_next)
			    ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
			else
				printf("Couldn't unlink nsifaddr from ifp\n");
		}
		oia = ia;
		if (oia == (ia = ns_ifaddr)) {
			ns_ifaddr = ia->ia_next;
		} else {
			while (ia->ia_next && (ia->ia_next != oia)) {
				ia = ia->ia_next;
			}
			if (ia->ia_next)
			    ia->ia_next = oia->ia_next;
			else
				printf("Didn't unlink nsifadr from list\n");
		}
		(void) m_free(dtom(oia));
		if (0 == --ns_interfaces) {
			/*
			 * We reset to virginity and start all over again
			 */
			ns_thishost = ns_zerohost;
		}
		return (0);
	
	case SIOCAIFADDR:
		error = 0;
		dstIsNew = 0; hostIsNew = 1;
		if (ia->ia_addr.sns_family == AF_NS) {
			if (ifra->ifra_addr.sns_len == 0) {
				ifra->ifra_addr = ia->ia_addr;
				hostIsNew = 0;
			} else if (ns_neteq(ifra->ifra_addr.sns_addr,
					 ia->ia_addr.sns_addr))
				hostIsNew = 0;
		}
		if ((ifp->if_flags & IFF_POINTOPOINT) &&
		    (ifra->ifra_dstaddr.sns_family == AF_NS)) {
			if (hostIsNew == 0)
				ns_ifscrub(ifp, ia);
			ia->ia_dstaddr = ifra->ifra_dstaddr;
			dstIsNew  = 1;
		}
		if (ifra->ifra_addr.sns_family == AF_NS &&
					    (hostIsNew || dstIsNew))
			error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
		return (error);

	default:
		if (ifp->if_ioctl == 0)
			return (EOPNOTSUPP);
		return ((*ifp->if_ioctl)(ifp, cmd, data));
	}
}

/*
* Delete any previous route for an old address.
*/
static void
ns_ifscrub(ifp, ia)
	register struct ifnet *ifp;
	register struct ns_ifaddr *ia; 
{
	if (ia->ia_flags & IFA_ROUTE) {
		if (ifp->if_flags & IFF_POINTOPOINT) {
			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
		} else
			rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
		ia->ia_flags &= ~IFA_ROUTE;
	}
}
/*
 * Initialize an interface's internet address
 * and routing table entry.
 */
int
ns_ifinit(ifp, ia, sns, scrub)
	register struct ifnet *ifp;
	register struct ns_ifaddr *ia;
	register struct sockaddr_ns *sns;
	int scrub;
{
	struct sockaddr_ns oldaddr;
	register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
	int s = splimp(), error;

	/*
	 * Set up new addresses.
	 */
	oldaddr = ia->ia_addr;
	ia->ia_addr = *sns;
	/*
	 * The convention we shall adopt for naming is that
	 * a supplied address of zero means that "we don't care".
	 * if there is a single interface, use the address of that
	 * interface as our 6 byte host address.
	 * if there are multiple interfaces, use any address already
	 * used.
	 *
	 * Give the interface a chance to initialize
	 * if this is its first address,
	 * and to validate the address if necessary.
	 */
	if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
		if (ifp->if_ioctl &&
		     (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, 
					       (caddr_t)ia))) {
			ia->ia_addr = oldaddr;
			splx(s);
			return (error);
		}
		ns_thishost = *h;
	} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
	    || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
		*h = ns_thishost;
		if (ifp->if_ioctl &&
		     (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, 
					       (caddr_t)ia))) {
			ia->ia_addr = oldaddr;
			splx(s);
			return (error);
		}
		if (!ns_hosteqnh(ns_thishost,*h)) {
			ia->ia_addr = oldaddr;
			splx(s);
			return (EINVAL);
		}
	} else {
		ia->ia_addr = oldaddr;
		splx(s);
		return (EINVAL);
	}
	/*
	 * Add route for the network.
	 */
	if (scrub) {
		ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
		ns_ifscrub(ifp, ia);
		ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
	}
	if (ifp->if_flags & IFF_POINTOPOINT)
		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
	else {
		ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
		rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
	}
	ia->ia_flags |= IFA_ROUTE;
	return (0);
}

/*
 * Return address info for specified internet network.
 */
struct ns_ifaddr *
ns_iaonnetof(dst)
	register struct ns_addr *dst;
{
	register struct ns_ifaddr *ia;
	register struct ns_addr *compare;
	register struct ifnet *ifp;
	struct ns_ifaddr *ia_maybe = 0;
	union ns_net net = dst->x_net;

	for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
		if (ifp = ia->ia_ifp) {
			if (ifp->if_flags & IFF_POINTOPOINT) {
				compare = &satons_addr(ia->ia_dstaddr);
				if (ns_hosteq(*dst, *compare))
					return (ia);
				if (ns_neteqnn(net, ia->ia_net))
					ia_maybe = ia;
			} else {
				if (ns_neteqnn(net, ia->ia_net))
					return (ia);
			}
		}
	}
	return (ia_maybe);
}
#endif
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
42524852	33	* from: @(#)ns.c 7.8 (Berkeley) 6/27/91
4c45483e	34	* $Id: ns.c,v 1.3 1993/11/07 17:50:23 wollman Exp $
15637ed4 RG	35	*/
	36
	37	#include "param.h"
	38	#include "mbuf.h"
	39	#include "ioctl.h"
	40	#include "protosw.h"
	41	#include "errno.h"
	42	#include "socket.h"
	43	#include "socketvar.h"
	44
	45
	46	#include "../net/if.h"
	47	#include "../net/route.h"
15637ed4 RG	48
	49	#include "ns.h"
	50	#include "ns_if.h"
	51
	52	#ifdef NS
	53
4c45483e GW	54	static void ns_ifscrub(struct ifnet , struct ns_ifaddr );
4c45483e GW	55
15637ed4	56	struct ns_ifaddr *ns_ifaddr;
8ace4366 GW	57	struct ifqueue nsintrq;
8ace4366 GW	58
15637ed4 RG	59	int ns_interfaces;
15637ed4 RG	60	extern struct sockaddr_ns ns_netmask, ns_hostmask;
8ace4366 GW	61	union ns_host ns_thishost;
	62	union ns_host ns_zerohost;
	63	union ns_host ns_braodhost;
	64	union ns_net ns_zeronet;
	65	union ns_net ns_broadnet;
15637ed4 RG	66
	67	/*
	68	* Generic internet control operations (ioctl's).
	69	*/
	70	/* ARGSUSED */
4c45483e	71	int
15637ed4 RG	72	ns_control(so, cmd, data, ifp)
	73	struct socket *so;
	74	int cmd;
	75	caddr_t data;
	76	register struct ifnet *ifp;
	77	{
	78	register struct ifreq ifr = (struct ifreq )data;
	79	register struct ns_aliasreq ifra = (struct ns_aliasreq )data;
	80	register struct ns_ifaddr *ia;
	81	struct ifaddr *ifa;
	82	struct ns_ifaddr *oia;
	83	struct mbuf *m;
	84	int error, dstIsNew, hostIsNew;
	85
	86	/*
	87	* Find address for this interface, if it exists.
	88	*/
	89	if (ifp == 0)
	90	return (EADDRNOTAVAIL);
	91	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
	92	if (ia->ia_ifp == ifp)
	93	break;
	94
	95	switch (cmd) {
	96
	97	case SIOCGIFADDR:
	98	if (ia == (struct ns_ifaddr *)0)
	99	return (EADDRNOTAVAIL);
	100	(struct sockaddr_ns )&ifr->ifr_addr = ia->ia_addr;
	101	return (0);
	102
	103
	104	case SIOCGIFBRDADDR:
	105	if (ia == (struct ns_ifaddr *)0)
	106	return (EADDRNOTAVAIL);
	107	if ((ifp->if_flags & IFF_BROADCAST) == 0)
	108	return (EINVAL);
	109	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_broadaddr;
	110	return (0);
	111
	112	case SIOCGIFDSTADDR:
	113	if (ia == (struct ns_ifaddr *)0)
	114	return (EADDRNOTAVAIL);
	115	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
	116	return (EINVAL);
	117	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_dstaddr;
	118	return (0);
	119	}
	120
	121	if ((so->so_state & SS_PRIV) == 0)
	122	return (EPERM);
	123
	124	switch (cmd) {
	125	case SIOCAIFADDR:
	126	case SIOCDIFADDR:
	127	if (ifra->ifra_addr.sns_family == AF_NS)
	128	for (oia = ia; ia; ia = ia->ia_next) {
	129	if (ia->ia_ifp == ifp &&
	130	ns_neteq(ia->ia_addr.sns_addr,
	131	ifra->ifra_addr.sns_addr))
	132	break;
	133	}
	134	if (cmd == SIOCDIFADDR && ia == 0)
	135	return (EADDRNOTAVAIL);
136	/* FALLTHROUGH */
137
138	case SIOCSIFADDR:
139	case SIOCSIFDSTADDR:
140	if (ia == (struct ns_ifaddr *)0) {
141	m = m_getclr(M_WAIT, MT_IFADDR);
142	if (m == (struct mbuf *)NULL)
143	return (ENOBUFS);
144	if (ia = ns_ifaddr) {
145	for ( ; ia->ia_next; ia = ia->ia_next)
146	;
147	ia->ia_next = mtod(m, struct ns_ifaddr *);
148	} else
149	ns_ifaddr = mtod(m, struct ns_ifaddr *);
150	ia = mtod(m, struct ns_ifaddr *);
151	if (ifa = ifp->if_addrlist) {
152	for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
153	;
154	ifa->ifa_next = (struct ifaddr *) ia;
155	} else
156	ifp->if_addrlist = (struct ifaddr *) ia;
157	ia->ia_ifp = ifp;
158	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
159
160	ia->ia_ifa.ifa_netmask =
161	(struct sockaddr *)&ns_netmask;
162
163	ia->ia_ifa.ifa_dstaddr =
164	(struct sockaddr *)&ia->ia_dstaddr;
165	if (ifp->if_flags & IFF_BROADCAST) {
166	ia->ia_broadaddr.sns_family = AF_NS;
167	ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
168	ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
169	}
170	ns_interfaces++;
171	}
172	}
173
174	switch (cmd) {
175	int error;
176
177	case SIOCSIFDSTADDR:
178	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
179	return (EINVAL);
180	if (ia->ia_flags & IFA_ROUTE) {
181	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
182	ia->ia_flags &= ~IFA_ROUTE;
183	}
184	if (ifp->if_ioctl) {
4c45483e GW	185	error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
4c45483e GW	186	(caddr_t)ia);
15637ed4 RG	187	if (error)
	188	return (error);
	189	}
	190	(struct sockaddr )&ia->ia_dstaddr = ifr->ifr_dstaddr;
	191	return (0);
	192
	193	case SIOCSIFADDR:
	194	return (ns_ifinit(ifp, ia,
	195	(struct sockaddr_ns *)&ifr->ifr_addr, 1));
	196
	197	case SIOCDIFADDR:
4c45483e	198	error = 0;
15637ed4 RG	199	ns_ifscrub(ifp, ia);
	200	if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
	201	ifp->if_addrlist = ifa->ifa_next;
	202	else {
	203	while (ifa->ifa_next &&
	204	(ifa->ifa_next != (struct ifaddr *)ia))
	205	ifa = ifa->ifa_next;
	206	if (ifa->ifa_next)
	207	ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
	208	else
	209	printf("Couldn't unlink nsifaddr from ifp\n");
	210	}
	211	oia = ia;
	212	if (oia == (ia = ns_ifaddr)) {
	213	ns_ifaddr = ia->ia_next;
	214	} else {
	215	while (ia->ia_next && (ia->ia_next != oia)) {
	216	ia = ia->ia_next;
	217	}
	218	if (ia->ia_next)
	219	ia->ia_next = oia->ia_next;
	220	else
	221	printf("Didn't unlink nsifadr from list\n");
	222	}
	223	(void) m_free(dtom(oia));
	224	if (0 == --ns_interfaces) {
	225	/*
	226	* We reset to virginity and start all over again
	227	*/
	228	ns_thishost = ns_zerohost;
	229	}
	230	return (0);
	231
	232	case SIOCAIFADDR:
4c45483e	233	error = 0;
15637ed4 RG	234	dstIsNew = 0; hostIsNew = 1;
	235	if (ia->ia_addr.sns_family == AF_NS) {
	236	if (ifra->ifra_addr.sns_len == 0) {
	237	ifra->ifra_addr = ia->ia_addr;
	238	hostIsNew = 0;
	239	} else if (ns_neteq(ifra->ifra_addr.sns_addr,
	240	ia->ia_addr.sns_addr))
	241	hostIsNew = 0;
	242	}
	243	if ((ifp->if_flags & IFF_POINTOPOINT) &&
	244	(ifra->ifra_dstaddr.sns_family == AF_NS)) {
	245	if (hostIsNew == 0)
	246	ns_ifscrub(ifp, ia);
	247	ia->ia_dstaddr = ifra->ifra_dstaddr;
	248	dstIsNew = 1;
	249	}
	250	if (ifra->ifra_addr.sns_family == AF_NS &&
	251	(hostIsNew \|\| dstIsNew))
	252	error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
	253	return (error);
	254
	255	default:
	256	if (ifp->if_ioctl == 0)
	257	return (EOPNOTSUPP);
	258	return ((*ifp->if_ioctl)(ifp, cmd, data));
	259	}
	260	}
	261
	262	/*
	263	* Delete any previous route for an old address.
	264	*/
4c45483e	265	static void
15637ed4 RG	266	ns_ifscrub(ifp, ia)
	267	register struct ifnet *ifp;
	268	register struct ns_ifaddr *ia;
	269	{
	270	if (ia->ia_flags & IFA_ROUTE) {
	271	if (ifp->if_flags & IFF_POINTOPOINT) {
	272	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
	273	} else
	274	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
	275	ia->ia_flags &= ~IFA_ROUTE;
	276	}
	277	}
	278	/*
	279	* Initialize an interface's internet address
	280	* and routing table entry.
	281	*/
4c45483e	282	int
15637ed4 RG	283	ns_ifinit(ifp, ia, sns, scrub)
	284	register struct ifnet *ifp;
	285	register struct ns_ifaddr *ia;
	286	register struct sockaddr_ns *sns;
4c45483e	287	int scrub;
15637ed4 RG	288	{
	289	struct sockaddr_ns oldaddr;
	290	register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
	291	int s = splimp(), error;
	292
	293	/*
	294	* Set up new addresses.
	295	*/
	296	oldaddr = ia->ia_addr;
	297	ia->ia_addr = *sns;
	298	/*
	299	* The convention we shall adopt for naming is that
	300	* a supplied address of zero means that "we don't care".
	301	* if there is a single interface, use the address of that
	302	* interface as our 6 byte host address.
	303	* if there are multiple interfaces, use any address already
	304	* used.
	305	*
	306	* Give the interface a chance to initialize
	307	* if this is its first address,
	308	* and to validate the address if necessary.
	309	*/
	310	if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
	311	if (ifp->if_ioctl &&
4c45483e GW	312	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
4c45483e GW	313	(caddr_t)ia))) {
15637ed4 RG	314	ia->ia_addr = oldaddr;
	315	splx(s);
	316	return (error);
	317	}
	318	ns_thishost = *h;
	319	} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
	320	\|\| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
	321	*h = ns_thishost;
	322	if (ifp->if_ioctl &&
4c45483e GW	323	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
4c45483e GW	324	(caddr_t)ia))) {
15637ed4 RG	325	ia->ia_addr = oldaddr;
	326	splx(s);
	327	return (error);
	328	}
	329	if (!ns_hosteqnh(ns_thishost,*h)) {
	330	ia->ia_addr = oldaddr;
	331	splx(s);
	332	return (EINVAL);
	333	}
	334	} else {
	335	ia->ia_addr = oldaddr;
	336	splx(s);
	337	return (EINVAL);
	338	}
	339	/*
	340	* Add route for the network.
	341	*/
	342	if (scrub) {
	343	ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
	344	ns_ifscrub(ifp, ia);
	345	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
	346	}
	347	if (ifp->if_flags & IFF_POINTOPOINT)
	348	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST\|RTF_UP);
	349	else {
	350	ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
	351	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
	352	}
	353	ia->ia_flags \|= IFA_ROUTE;
	354	return (0);
	355	}
	356
	357	/*
	358	* Return address info for specified internet network.
	359	*/
	360	struct ns_ifaddr *
	361	ns_iaonnetof(dst)
	362	register struct ns_addr *dst;
	363	{
	364	register struct ns_ifaddr *ia;
	365	register struct ns_addr *compare;
	366	register struct ifnet *ifp;
	367	struct ns_ifaddr *ia_maybe = 0;
	368	union ns_net net = dst->x_net;
	369
	370	for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
	371	if (ifp = ia->ia_ifp) {
	372	if (ifp->if_flags & IFF_POINTOPOINT) {
	373	compare = &satons_addr(ia->ia_dstaddr);
	374	if (ns_hosteq(dst, compare))
	375	return (ia);
	376	if (ns_neteqnn(net, ia->ia_net))
	377	ia_maybe = ia;
	378	} else {
	379	if (ns_neteqnn(net, ia->ia_net))
	380	return (ia);
	381	}
	382	}
	383	}
	384	return (ia_maybe);
	385	}
	386	#endif