[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
 *	$Id$
 */

#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 "../net/af.h"

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

#ifdef NS

struct ns_ifaddr *ns_ifaddr;
int ns_interfaces;
extern struct sockaddr_ns ns_netmask, ns_hostmask;

/*
 * 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	*
78ed81a3	33	* from: @(#)ns.c 7.8 (Berkeley) 6/27/91
78ed81a3	34	* $Id$
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"
	48	#include "../net/af.h"
	49
	50	#include "ns.h"
	51	#include "ns_if.h"
	52
	53	#ifdef NS
	54
	55	struct ns_ifaddr *ns_ifaddr;
	56	int ns_interfaces;
	57	extern struct sockaddr_ns ns_netmask, ns_hostmask;
	58
	59	/*
	60	* Generic internet control operations (ioctl's).
	61	*/
	62	/* ARGSUSED */
	63	ns_control(so, cmd, data, ifp)
	64	struct socket *so;
	65	int cmd;
	66	caddr_t data;
	67	register struct ifnet *ifp;
	68	{
	69	register struct ifreq ifr = (struct ifreq )data;
	70	register struct ns_aliasreq ifra = (struct ns_aliasreq )data;
	71	register struct ns_ifaddr *ia;
	72	struct ifaddr *ifa;
	73	struct ns_ifaddr *oia;
	74	struct mbuf *m;
	75	int error, dstIsNew, hostIsNew;
	76
	77	/*
	78	* Find address for this interface, if it exists.
	79	*/
	80	if (ifp == 0)
	81	return (EADDRNOTAVAIL);
	82	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
	83	if (ia->ia_ifp == ifp)
	84	break;
	85
	86	switch (cmd) {
	87
	88	case SIOCGIFADDR:
	89	if (ia == (struct ns_ifaddr *)0)
	90	return (EADDRNOTAVAIL);
	91	(struct sockaddr_ns )&ifr->ifr_addr = ia->ia_addr;
	92	return (0);
	93
	94
	95	case SIOCGIFBRDADDR:
	96	if (ia == (struct ns_ifaddr *)0)
	97	return (EADDRNOTAVAIL);
	98	if ((ifp->if_flags & IFF_BROADCAST) == 0)
99	return (EINVAL);
100	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_broadaddr;
101	return (0);
102
103	case SIOCGIFDSTADDR:
104	if (ia == (struct ns_ifaddr *)0)
105	return (EADDRNOTAVAIL);
106	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
107	return (EINVAL);
108	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_dstaddr;
109	return (0);
110	}
111
112	if ((so->so_state & SS_PRIV) == 0)
113	return (EPERM);
114
115	switch (cmd) {
116	case SIOCAIFADDR:
117	case SIOCDIFADDR:
118	if (ifra->ifra_addr.sns_family == AF_NS)
119	for (oia = ia; ia; ia = ia->ia_next) {
120	if (ia->ia_ifp == ifp &&
121	ns_neteq(ia->ia_addr.sns_addr,
122	ifra->ifra_addr.sns_addr))
123	break;
124	}
125	if (cmd == SIOCDIFADDR && ia == 0)
126	return (EADDRNOTAVAIL);
127	/* FALLTHROUGH */
128
129	case SIOCSIFADDR:
130	case SIOCSIFDSTADDR:
131	if (ia == (struct ns_ifaddr *)0) {
132	m = m_getclr(M_WAIT, MT_IFADDR);
133	if (m == (struct mbuf *)NULL)
134	return (ENOBUFS);
135	if (ia = ns_ifaddr) {
136	for ( ; ia->ia_next; ia = ia->ia_next)
137	;
138	ia->ia_next = mtod(m, struct ns_ifaddr *);
139	} else
140	ns_ifaddr = mtod(m, struct ns_ifaddr *);
141	ia = mtod(m, struct ns_ifaddr *);
142	if (ifa = ifp->if_addrlist) {
143	for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
144	;
145	ifa->ifa_next = (struct ifaddr *) ia;
146	} else
147	ifp->if_addrlist = (struct ifaddr *) ia;
148	ia->ia_ifp = ifp;
149	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
150
151	ia->ia_ifa.ifa_netmask =
152	(struct sockaddr *)&ns_netmask;
153
154	ia->ia_ifa.ifa_dstaddr =
155	(struct sockaddr *)&ia->ia_dstaddr;
156	if (ifp->if_flags & IFF_BROADCAST) {
157	ia->ia_broadaddr.sns_family = AF_NS;
158	ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
159	ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
160	}
161	ns_interfaces++;
162	}
163	}
164
165	switch (cmd) {
166	int error;
167
168	case SIOCSIFDSTADDR:
169	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
170	return (EINVAL);
171	if (ia->ia_flags & IFA_ROUTE) {
172	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
173	ia->ia_flags &= ~IFA_ROUTE;
174	}
175	if (ifp->if_ioctl) {
176	error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
177	if (error)
178	return (error);
179	}
180	(struct sockaddr )&ia->ia_dstaddr = ifr->ifr_dstaddr;
181	return (0);
182
183	case SIOCSIFADDR:
184	return (ns_ifinit(ifp, ia,
185	(struct sockaddr_ns *)&ifr->ifr_addr, 1));
186
187	case SIOCDIFADDR:
188	ns_ifscrub(ifp, ia);
189	if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
190	ifp->if_addrlist = ifa->ifa_next;
191	else {
192	while (ifa->ifa_next &&
193	(ifa->ifa_next != (struct ifaddr *)ia))
194	ifa = ifa->ifa_next;
195	if (ifa->ifa_next)
196	ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
197	else
198	printf("Couldn't unlink nsifaddr from ifp\n");
199	}
200	oia = ia;
201	if (oia == (ia = ns_ifaddr)) {
202	ns_ifaddr = ia->ia_next;
203	} else {
204	while (ia->ia_next && (ia->ia_next != oia)) {
205	ia = ia->ia_next;
206	}
207	if (ia->ia_next)
208	ia->ia_next = oia->ia_next;
209	else
210	printf("Didn't unlink nsifadr from list\n");
211	}
212	(void) m_free(dtom(oia));
213	if (0 == --ns_interfaces) {
214	/*
215	* We reset to virginity and start all over again
216	*/
217	ns_thishost = ns_zerohost;
218	}
219	return (0);
220
221	case SIOCAIFADDR:
222	dstIsNew = 0; hostIsNew = 1;
223	if (ia->ia_addr.sns_family == AF_NS) {
224	if (ifra->ifra_addr.sns_len == 0) {
225	ifra->ifra_addr = ia->ia_addr;
226	hostIsNew = 0;
227	} else if (ns_neteq(ifra->ifra_addr.sns_addr,
228	ia->ia_addr.sns_addr))
229	hostIsNew = 0;
230	}
231	if ((ifp->if_flags & IFF_POINTOPOINT) &&
232	(ifra->ifra_dstaddr.sns_family == AF_NS)) {
233	if (hostIsNew == 0)
234	ns_ifscrub(ifp, ia);
235	ia->ia_dstaddr = ifra->ifra_dstaddr;
236	dstIsNew = 1;
237	}
238	if (ifra->ifra_addr.sns_family == AF_NS &&
239	(hostIsNew \|\| dstIsNew))
240	error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
241	return (error);
242
243	default:
244	if (ifp->if_ioctl == 0)
245	return (EOPNOTSUPP);
246	return ((*ifp->if_ioctl)(ifp, cmd, data));
247	}
248	}
249
250	/*
251	* Delete any previous route for an old address.
252	*/
253	ns_ifscrub(ifp, ia)
254	register struct ifnet *ifp;
255	register struct ns_ifaddr *ia;
256	{
257	if (ia->ia_flags & IFA_ROUTE) {
258	if (ifp->if_flags & IFF_POINTOPOINT) {
259	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
260	} else
261	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
262	ia->ia_flags &= ~IFA_ROUTE;
263	}
264	}
265	/*
266	* Initialize an interface's internet address
267	* and routing table entry.
268	*/
269	ns_ifinit(ifp, ia, sns, scrub)
270	register struct ifnet *ifp;
271	register struct ns_ifaddr *ia;
272	register struct sockaddr_ns *sns;
273	{
274	struct sockaddr_ns oldaddr;
275	register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
276	int s = splimp(), error;
277
278	/*
279	* Set up new addresses.
280	*/
281	oldaddr = ia->ia_addr;
282	ia->ia_addr = *sns;
283	/*
284	* The convention we shall adopt for naming is that
285	* a supplied address of zero means that "we don't care".
286	* if there is a single interface, use the address of that
287	* interface as our 6 byte host address.
288	* if there are multiple interfaces, use any address already
289	* used.
290	*
291	* Give the interface a chance to initialize
292	* if this is its first address,
293	* and to validate the address if necessary.
294	*/
295	if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
296	if (ifp->if_ioctl &&
297	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
298	ia->ia_addr = oldaddr;
299	splx(s);
300	return (error);
301	}
302	ns_thishost = *h;
303	} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
304	\|\| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
305	*h = ns_thishost;
306	if (ifp->if_ioctl &&
307	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
308	ia->ia_addr = oldaddr;
309	splx(s);
310	return (error);
311	}
312	if (!ns_hosteqnh(ns_thishost,*h)) {
313	ia->ia_addr = oldaddr;
314	splx(s);
315	return (EINVAL);
316	}
317	} else {
318	ia->ia_addr = oldaddr;
319	splx(s);
320	return (EINVAL);
321	}
322	/*
323	* Add route for the network.
324	*/
325	if (scrub) {
326	ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
327	ns_ifscrub(ifp, ia);
328	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
329	}
330	if (ifp->if_flags & IFF_POINTOPOINT)
331	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST\|RTF_UP);
332	else {
333	ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
334	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
335	}
336	ia->ia_flags \|= IFA_ROUTE;
337	return (0);
338	}
339
340	/*
341	* Return address info for specified internet network.
342	*/
343	struct ns_ifaddr *
344	ns_iaonnetof(dst)
345	register struct ns_addr *dst;
346	{
347	register struct ns_ifaddr *ia;
348	register struct ns_addr *compare;
349	register struct ifnet *ifp;
350	struct ns_ifaddr *ia_maybe = 0;
351	union ns_net net = dst->x_net;
352
353	for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
354	if (ifp = ia->ia_ifp) {
355	if (ifp->if_flags & IFF_POINTOPOINT) {
356	compare = &satons_addr(ia->ia_dstaddr);
357	if (ns_hosteq(dst, compare))
358	return (ia);
359	if (ns_neteqnn(net, ia->ia_net))
360	ia_maybe = ia;
361	} else {
362	if (ns_neteqnn(net, ia->ia_net))
363	return (ia);
364	}
365	}
366	}
367	return (ia_maybe);
368	}
369	#endif