[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 1.2 1993/10/16 19:54:14 rgrimes 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

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 */
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, 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:
		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:
		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.
*/
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.
 */
ns_ifinit(ifp, ia, sns, scrub)
	register struct ifnet *ifp;
	register struct ns_ifaddr *ia;
	register struct sockaddr_ns *sns;
{
	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, 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, 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
8ace4366	34	* $Id: ns.c,v 1.2 1993/10/16 19:54:14 rgrimes 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
	54	struct ns_ifaddr *ns_ifaddr;
8ace4366 GW	55	struct ifqueue nsintrq;
8ace4366 GW	56
15637ed4 RG	57	int ns_interfaces;
15637ed4 RG	58	extern struct sockaddr_ns ns_netmask, ns_hostmask;
8ace4366 GW	59	union ns_host ns_thishost;
	60	union ns_host ns_zerohost;
	61	union ns_host ns_braodhost;
	62	union ns_net ns_zeronet;
	63	union ns_net ns_broadnet;
15637ed4 RG	64
	65	/*
	66	* Generic internet control operations (ioctl's).
	67	*/
	68	/* ARGSUSED */
	69	ns_control(so, cmd, data, ifp)
	70	struct socket *so;
	71	int cmd;
	72	caddr_t data;
	73	register struct ifnet *ifp;
	74	{
	75	register struct ifreq ifr = (struct ifreq )data;
	76	register struct ns_aliasreq ifra = (struct ns_aliasreq )data;
	77	register struct ns_ifaddr *ia;
	78	struct ifaddr *ifa;
	79	struct ns_ifaddr *oia;
	80	struct mbuf *m;
	81	int error, dstIsNew, hostIsNew;
	82
	83	/*
	84	* Find address for this interface, if it exists.
	85	*/
	86	if (ifp == 0)
	87	return (EADDRNOTAVAIL);
	88	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
	89	if (ia->ia_ifp == ifp)
	90	break;
	91
	92	switch (cmd) {
	93
	94	case SIOCGIFADDR:
	95	if (ia == (struct ns_ifaddr *)0)
	96	return (EADDRNOTAVAIL);
	97	(struct sockaddr_ns )&ifr->ifr_addr = ia->ia_addr;
	98	return (0);
	99
	100
	101	case SIOCGIFBRDADDR:
	102	if (ia == (struct ns_ifaddr *)0)
	103	return (EADDRNOTAVAIL);
	104	if ((ifp->if_flags & IFF_BROADCAST) == 0)
	105	return (EINVAL);
	106	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_broadaddr;
	107	return (0);
	108
	109	case SIOCGIFDSTADDR:
	110	if (ia == (struct ns_ifaddr *)0)
	111	return (EADDRNOTAVAIL);
	112	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
	113	return (EINVAL);
	114	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_dstaddr;
	115	return (0);
	116	}
	117
	118	if ((so->so_state & SS_PRIV) == 0)
	119	return (EPERM);
	120
	121	switch (cmd) {
	122	case SIOCAIFADDR:
	123	case SIOCDIFADDR:
	124	if (ifra->ifra_addr.sns_family == AF_NS)
	125	for (oia = ia; ia; ia = ia->ia_next) {
	126	if (ia->ia_ifp == ifp &&
	127	ns_neteq(ia->ia_addr.sns_addr,
128	ifra->ifra_addr.sns_addr))
129	break;
130	}
131	if (cmd == SIOCDIFADDR && ia == 0)
132	return (EADDRNOTAVAIL);
133	/* FALLTHROUGH */
134
135	case SIOCSIFADDR:
136	case SIOCSIFDSTADDR:
137	if (ia == (struct ns_ifaddr *)0) {
138	m = m_getclr(M_WAIT, MT_IFADDR);
139	if (m == (struct mbuf *)NULL)
140	return (ENOBUFS);
141	if (ia = ns_ifaddr) {
142	for ( ; ia->ia_next; ia = ia->ia_next)
143	;
144	ia->ia_next = mtod(m, struct ns_ifaddr *);
145	} else
146	ns_ifaddr = mtod(m, struct ns_ifaddr *);
147	ia = mtod(m, struct ns_ifaddr *);
148	if (ifa = ifp->if_addrlist) {
149	for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
150	;
151	ifa->ifa_next = (struct ifaddr *) ia;
152	} else
153	ifp->if_addrlist = (struct ifaddr *) ia;
154	ia->ia_ifp = ifp;
155	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
156
157	ia->ia_ifa.ifa_netmask =
158	(struct sockaddr *)&ns_netmask;
159
160	ia->ia_ifa.ifa_dstaddr =
161	(struct sockaddr *)&ia->ia_dstaddr;
162	if (ifp->if_flags & IFF_BROADCAST) {
163	ia->ia_broadaddr.sns_family = AF_NS;
164	ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
165	ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
166	}
167	ns_interfaces++;
168	}
169	}
170
171	switch (cmd) {
172	int error;
173
174	case SIOCSIFDSTADDR:
175	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
176	return (EINVAL);
177	if (ia->ia_flags & IFA_ROUTE) {
178	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
179	ia->ia_flags &= ~IFA_ROUTE;
180	}
181	if (ifp->if_ioctl) {
182	error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
183	if (error)
184	return (error);
185	}
186	(struct sockaddr )&ia->ia_dstaddr = ifr->ifr_dstaddr;
187	return (0);
188
189	case SIOCSIFADDR:
190	return (ns_ifinit(ifp, ia,
191	(struct sockaddr_ns *)&ifr->ifr_addr, 1));
192
193	case SIOCDIFADDR:
194	ns_ifscrub(ifp, ia);
195	if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
196	ifp->if_addrlist = ifa->ifa_next;
197	else {
198	while (ifa->ifa_next &&
199	(ifa->ifa_next != (struct ifaddr *)ia))
200	ifa = ifa->ifa_next;
201	if (ifa->ifa_next)
202	ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
203	else
204	printf("Couldn't unlink nsifaddr from ifp\n");
205	}
206	oia = ia;
207	if (oia == (ia = ns_ifaddr)) {
208	ns_ifaddr = ia->ia_next;
209	} else {
210	while (ia->ia_next && (ia->ia_next != oia)) {
211	ia = ia->ia_next;
212	}
213	if (ia->ia_next)
214	ia->ia_next = oia->ia_next;
215	else
216	printf("Didn't unlink nsifadr from list\n");
217	}
218	(void) m_free(dtom(oia));
219	if (0 == --ns_interfaces) {
220	/*
221	* We reset to virginity and start all over again
222	*/
223	ns_thishost = ns_zerohost;
224	}
225	return (0);
226
227	case SIOCAIFADDR:
228	dstIsNew = 0; hostIsNew = 1;
229	if (ia->ia_addr.sns_family == AF_NS) {
230	if (ifra->ifra_addr.sns_len == 0) {
231	ifra->ifra_addr = ia->ia_addr;
232	hostIsNew = 0;
233	} else if (ns_neteq(ifra->ifra_addr.sns_addr,
234	ia->ia_addr.sns_addr))
235	hostIsNew = 0;
236	}
237	if ((ifp->if_flags & IFF_POINTOPOINT) &&
238	(ifra->ifra_dstaddr.sns_family == AF_NS)) {
239	if (hostIsNew == 0)
240	ns_ifscrub(ifp, ia);
241	ia->ia_dstaddr = ifra->ifra_dstaddr;
242	dstIsNew = 1;
243	}
244	if (ifra->ifra_addr.sns_family == AF_NS &&
245	(hostIsNew \|\| dstIsNew))
246	error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
247	return (error);
248
249	default:
250	if (ifp->if_ioctl == 0)
251	return (EOPNOTSUPP);
252	return ((*ifp->if_ioctl)(ifp, cmd, data));
253	}
254	}
255
256	/*
257	* Delete any previous route for an old address.
258	*/
259	ns_ifscrub(ifp, ia)
260	register struct ifnet *ifp;
261	register struct ns_ifaddr *ia;
262	{
263	if (ia->ia_flags & IFA_ROUTE) {
264	if (ifp->if_flags & IFF_POINTOPOINT) {
265	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
266	} else
267	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
268	ia->ia_flags &= ~IFA_ROUTE;
269	}
270	}
271	/*
272	* Initialize an interface's internet address
273	* and routing table entry.
274	*/
275	ns_ifinit(ifp, ia, sns, scrub)
276	register struct ifnet *ifp;
277	register struct ns_ifaddr *ia;
278	register struct sockaddr_ns *sns;
279	{
280	struct sockaddr_ns oldaddr;
281	register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
282	int s = splimp(), error;
283
284	/*
285	* Set up new addresses.
286	*/
287	oldaddr = ia->ia_addr;
288	ia->ia_addr = *sns;
289	/*
290	* The convention we shall adopt for naming is that
291	* a supplied address of zero means that "we don't care".
292	* if there is a single interface, use the address of that
293	* interface as our 6 byte host address.
294	* if there are multiple interfaces, use any address already
295	* used.
296	*
297	* Give the interface a chance to initialize
298	* if this is its first address,
299	* and to validate the address if necessary.
300	*/
301	if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
302	if (ifp->if_ioctl &&
303	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
304	ia->ia_addr = oldaddr;
305	splx(s);
306	return (error);
307	}
308	ns_thishost = *h;
309	} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
310	\|\| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
311	*h = ns_thishost;
312	if (ifp->if_ioctl &&
313	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
314	ia->ia_addr = oldaddr;
315	splx(s);
316	return (error);
317	}
318	if (!ns_hosteqnh(ns_thishost,*h)) {
319	ia->ia_addr = oldaddr;
320	splx(s);
321	return (EINVAL);
322	}
323	} else {
324	ia->ia_addr = oldaddr;
325	splx(s);
326	return (EINVAL);
327	}
328	/*
329	* Add route for the network.
330	*/
331	if (scrub) {
332	ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
333	ns_ifscrub(ifp, ia);
334	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
335	}
336	if (ifp->if_flags & IFF_POINTOPOINT)
337	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST\|RTF_UP);
338	else {
339	ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
340	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
341	}
342	ia->ia_flags \|= IFA_ROUTE;
343	return (0);
344	}
345
346	/*
347	* Return address info for specified internet network.
348	*/
349	struct ns_ifaddr *
350	ns_iaonnetof(dst)
351	register struct ns_addr *dst;
352	{
353	register struct ns_ifaddr *ia;
354	register struct ns_addr *compare;
355	register struct ifnet *ifp;
356	struct ns_ifaddr *ia_maybe = 0;
357	union ns_net net = dst->x_net;
358
359	for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
360	if (ifp = ia->ia_ifp) {
361	if (ifp->if_flags & IFF_POINTOPOINT) {
362	compare = &satons_addr(ia->ia_dstaddr);
363	if (ns_hosteq(dst, compare))
364	return (ia);
365	if (ns_neteqnn(net, ia->ia_net))
366	ia_maybe = ia;
367	} else {
368	if (ns_neteqnn(net, ia->ia_net))
369	return (ia);
370	}
371	}
372	}
373	return (ia_maybe);
374	}
375	#endif