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

/*
 * Copyright (c) 1984, 1985, 1986, 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)ns.c	8.3 (Berkeley) %G%
 */

#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/protosw.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

#include <net/if.h>
#include <net/route.h>

#include <netns/ns.h>
#include <netns/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;
	u_long 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;
	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) {
			oia = (struct ns_ifaddr *)
				malloc(sizeof *ia, M_IFADDR, M_WAITOK);
			if (oia == (struct ns_ifaddr *)NULL)
				return (ENOBUFS);
			bzero((caddr_t)oia, sizeof(*oia));
			if (ia = ns_ifaddr) {
				for ( ; ia->ia_next; ia = ia->ia_next)
					;
				ia->ia_next = oia;
			} else
				ns_ifaddr = oia;
			ia = oia;
			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");
		}
		IFAFREE((&oia->ia_ifa));
		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);
	}
	ia->ia_ifa.ifa_metric = ifp->if_metric;
	/*
	 * 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_addr.sns_addr.x_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_addr.sns_addr.x_net))
					ia_maybe = ia;
			} else {
				if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
					return (ia);
			}
		}
	}
	return (ia_maybe);
}
#endif
Commit	Line	Data
8ae0e4b4	1	/*
99315dca KB	2	* Copyright (c) 1984, 1985, 1986, 1987, 1993
99315dca KB	3	* The Regents of the University of California. All rights reserved.
8ae0e4b4	4	*
dbf0c423	5	* %sccs.include.redist.c%
240edf1f	6	*
cf954fb2	7	* @(#)ns.c 8.3 (Berkeley) %G%
8ae0e4b4	8	*/
de9bc7de	9
5548a02f KB	10	#include <sys/param.h>
	11	#include <sys/mbuf.h>
	12	#include <sys/ioctl.h>
	13	#include <sys/protosw.h>
	14	#include <sys/errno.h>
	15	#include <sys/socket.h>
	16	#include <sys/socketvar.h>
de9bc7de	17
5548a02f KB	18	#include <net/if.h>
5548a02f KB	19	#include <net/route.h>
de9bc7de	20
5548a02f KB	21	#include <netns/ns.h>
5548a02f KB	22	#include <netns/ns_if.h>
de9bc7de KS	23
	24	#ifdef NS
	25
	26	struct ns_ifaddr *ns_ifaddr;
4dcdd98e KS	27	int ns_interfaces;
4dcdd98e KS	28	extern struct sockaddr_ns ns_netmask, ns_hostmask;
de9bc7de KS	29
	30	/*
	31	* Generic internet control operations (ioctl's).
	32	*/
f97be0c9	33	/* ARGSUSED */
de9bc7de KS	34	ns_control(so, cmd, data, ifp)
de9bc7de KS	35	struct socket *so;
cf954fb2	36	u_long cmd;
de9bc7de KS	37	caddr_t data;
	38	register struct ifnet *ifp;
	39	{
	40	register struct ifreq ifr = (struct ifreq )data;
4dcdd98e	41	register struct ns_aliasreq ifra = (struct ns_aliasreq )data;
de9bc7de KS	42	register struct ns_ifaddr *ia;
de9bc7de KS	43	struct ifaddr *ifa;
4dcdd98e	44	struct ns_ifaddr *oia;
dfe62cc7	45	int error, dstIsNew, hostIsNew;
de9bc7de	46
de9bc7de KS	47	/*
	48	* Find address for this interface, if it exists.
	49	*/
8b659320	50	if (ifp == 0)
4353fa68	51	return (EADDRNOTAVAIL);
de9bc7de KS	52	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
	53	if (ia->ia_ifp == ifp)
	54	break;
	55
	56	switch (cmd) {
	57
	58	case SIOCGIFADDR:
4353fa68 KS	59	if (ia == (struct ns_ifaddr *)0)
4353fa68 KS	60	return (EADDRNOTAVAIL);
4dcdd98e	61	(struct sockaddr_ns )&ifr->ifr_addr = ia->ia_addr;
4353fa68 KS	62	return (0);
	63
	64
de9bc7de	65	case SIOCGIFBRDADDR:
4353fa68 KS	66	if (ia == (struct ns_ifaddr *)0)
	67	return (EADDRNOTAVAIL);
	68	if ((ifp->if_flags & IFF_BROADCAST) == 0)
	69	return (EINVAL);
4dcdd98e	70	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_broadaddr;
4353fa68 KS	71	return (0);
4353fa68 KS	72
de9bc7de KS	73	case SIOCGIFDSTADDR:
	74	if (ia == (struct ns_ifaddr *)0)
	75	return (EADDRNOTAVAIL);
4353fa68 KS	76	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
4353fa68 KS	77	return (EINVAL);
4dcdd98e	78	(struct sockaddr_ns )&ifr->ifr_dstaddr = ia->ia_dstaddr;
4353fa68 KS	79	return (0);
	80	}
	81
f3841c44 KS	82	if ((so->so_state & SS_PRIV) == 0)
f3841c44 KS	83	return (EPERM);
4353fa68 KS	84
4353fa68 KS	85	switch (cmd) {
4dcdd98e KS	86	case SIOCAIFADDR:
	87	case SIOCDIFADDR:
	88	if (ifra->ifra_addr.sns_family == AF_NS)
	89	for (oia = ia; ia; ia = ia->ia_next) {
	90	if (ia->ia_ifp == ifp &&
	91	ns_neteq(ia->ia_addr.sns_addr,
	92	ifra->ifra_addr.sns_addr))
	93	break;
	94	}
	95	if (cmd == SIOCDIFADDR && ia == 0)
	96	return (EADDRNOTAVAIL);
	97	/* FALLTHROUGH */
de9bc7de	98
de9bc7de	99	case SIOCSIFADDR:
8b659320	100	case SIOCSIFDSTADDR:
de9bc7de	101	if (ia == (struct ns_ifaddr *)0) {
b965365f KS	102	oia = (struct ns_ifaddr *)
	103	malloc(sizeof *ia, M_IFADDR, M_WAITOK);
	104	if (oia == (struct ns_ifaddr *)NULL)
de9bc7de	105	return (ENOBUFS);
c4edeb45	106	bzero((caddr_t)oia, sizeof(*oia));
de9bc7de KS	107	if (ia = ns_ifaddr) {
	108	for ( ; ia->ia_next; ia = ia->ia_next)
	109	;
b965365f	110	ia->ia_next = oia;
de9bc7de	111	} else
b965365f KS	112	ns_ifaddr = oia;
b965365f KS	113	ia = oia;
de9bc7de KS	114	if (ifa = ifp->if_addrlist) {
	115	for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
	116	;
	117	ifa->ifa_next = (struct ifaddr *) ia;
	118	} else
	119	ifp->if_addrlist = (struct ifaddr *) ia;
	120	ia->ia_ifp = ifp;
4dcdd98e KS	121	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
	122
	123	ia->ia_ifa.ifa_netmask =
	124	(struct sockaddr *)&ns_netmask;
	125
	126	ia->ia_ifa.ifa_dstaddr =
	127	(struct sockaddr *)&ia->ia_dstaddr;
	128	if (ifp->if_flags & IFF_BROADCAST) {
	129	ia->ia_broadaddr.sns_family = AF_NS;
	130	ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
	131	ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
	132	}
	133	ns_interfaces++;
de9bc7de	134	}
8b659320 KS	135	}
	136
	137	switch (cmd) {
4dcdd98e	138	int error;
8b659320 KS	139
	140	case SIOCSIFDSTADDR:
	141	if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
	142	return (EINVAL);
	143	if (ia->ia_flags & IFA_ROUTE) {
4dcdd98e	144	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
8b659320 KS	145	ia->ia_flags &= ~IFA_ROUTE;
	146	}
	147	if (ifp->if_ioctl) {
4dcdd98e	148	error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
8b659320 KS	149	if (error)
	150	return (error);
	151	}
4dcdd98e	152	(struct sockaddr )&ia->ia_dstaddr = ifr->ifr_dstaddr;
8b659320 KS	153	return (0);
	154
	155	case SIOCSIFADDR:
4dcdd98e KS	156	return (ns_ifinit(ifp, ia,
	157	(struct sockaddr_ns *)&ifr->ifr_addr, 1));
	158
	159	case SIOCDIFADDR:
	160	ns_ifscrub(ifp, ia);
	161	if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
	162	ifp->if_addrlist = ifa->ifa_next;
	163	else {
	164	while (ifa->ifa_next &&
	165	(ifa->ifa_next != (struct ifaddr *)ia))
	166	ifa = ifa->ifa_next;
	167	if (ifa->ifa_next)
	168	ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
	169	else
	170	printf("Couldn't unlink nsifaddr from ifp\n");
	171	}
	172	oia = ia;
	173	if (oia == (ia = ns_ifaddr)) {
	174	ns_ifaddr = ia->ia_next;
	175	} else {
	176	while (ia->ia_next && (ia->ia_next != oia)) {
	177	ia = ia->ia_next;
	178	}
	179	if (ia->ia_next)
	180	ia->ia_next = oia->ia_next;
	181	else
	182	printf("Didn't unlink nsifadr from list\n");
	183	}
b965365f	184	IFAFREE((&oia->ia_ifa));
4dcdd98e KS	185	if (0 == --ns_interfaces) {
	186	/*
	187	* We reset to virginity and start all over again
	188	*/
	189	ns_thishost = ns_zerohost;
	190	}
	191	return (0);
	192
	193	case SIOCAIFADDR:
	194	dstIsNew = 0; hostIsNew = 1;
	195	if (ia->ia_addr.sns_family == AF_NS) {
	196	if (ifra->ifra_addr.sns_len == 0) {
	197	ifra->ifra_addr = ia->ia_addr;
	198	hostIsNew = 0;
	199	} else if (ns_neteq(ifra->ifra_addr.sns_addr,
	200	ia->ia_addr.sns_addr))
	201	hostIsNew = 0;
	202	}
	203	if ((ifp->if_flags & IFF_POINTOPOINT) &&
	204	(ifra->ifra_dstaddr.sns_family == AF_NS)) {
	205	if (hostIsNew == 0)
	206	ns_ifscrub(ifp, ia);
	207	ia->ia_dstaddr = ifra->ifra_dstaddr;
	208	dstIsNew = 1;
	209	}
	210	if (ifra->ifra_addr.sns_family == AF_NS &&
	211	(hostIsNew \|\| dstIsNew))
	212	error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
	213	return (error);
de9bc7de KS	214
	215	default:
	216	if (ifp->if_ioctl == 0)
	217	return (EOPNOTSUPP);
	218	return ((*ifp->if_ioctl)(ifp, cmd, data));
	219	}
de9bc7de KS	220	}
de9bc7de KS	221
4dcdd98e KS	222	/*
	223	* Delete any previous route for an old address.
	224	*/
	225	ns_ifscrub(ifp, ia)
	226	register struct ifnet *ifp;
	227	register struct ns_ifaddr *ia;
	228	{
	229	if (ia->ia_flags & IFA_ROUTE) {
	230	if (ifp->if_flags & IFF_POINTOPOINT) {
	231	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
	232	} else
	233	rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
	234	ia->ia_flags &= ~IFA_ROUTE;
	235	}
	236	}
de9bc7de KS	237	/*
	238	* Initialize an interface's internet address
	239	* and routing table entry.
	240	*/
4dcdd98e	241	ns_ifinit(ifp, ia, sns, scrub)
de9bc7de KS	242	register struct ifnet *ifp;
de9bc7de KS	243	register struct ns_ifaddr *ia;
4dcdd98e	244	register struct sockaddr_ns *sns;
de9bc7de	245	{
4dcdd98e KS	246	struct sockaddr_ns oldaddr;
4dcdd98e KS	247	register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
de9bc7de KS	248	int s = splimp(), error;
de9bc7de KS	249
4dcdd98e KS	250	/*
	251	* Set up new addresses.
	252	*/
	253	oldaddr = ia->ia_addr;
	254	ia->ia_addr = *sns;
de9bc7de KS	255	/*
	256	* The convention we shall adopt for naming is that
	257	* a supplied address of zero means that "we don't care".
	258	* if there is a single interface, use the address of that
	259	* interface as our 6 byte host address.
	260	* if there are multiple interfaces, use any address already
	261	* used.
	262	*
de9bc7de KS	263	* Give the interface a chance to initialize
	264	* if this is its first address,
	265	* and to validate the address if necessary.
	266	*/
de9bc7de KS	267	if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
	268	if (ifp->if_ioctl &&
	269	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
4dcdd98e	270	ia->ia_addr = oldaddr;
de9bc7de KS	271	splx(s);
	272	return (error);
	273	}
	274	ns_thishost = *h;
	275	} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
	276	\|\| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
	277	*h = ns_thishost;
	278	if (ifp->if_ioctl &&
	279	(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
4dcdd98e	280	ia->ia_addr = oldaddr;
de9bc7de KS	281	splx(s);
	282	return (error);
	283	}
8b659320	284	if (!ns_hosteqnh(ns_thishost,*h)) {
4dcdd98e	285	ia->ia_addr = oldaddr;
de9bc7de KS	286	splx(s);
	287	return (EINVAL);
	288	}
	289	} else {
4dcdd98e	290	ia->ia_addr = oldaddr;
de9bc7de	291	splx(s);
8b659320	292	return (EINVAL);
de9bc7de	293	}
e1d345b7	294	ia->ia_ifa.ifa_metric = ifp->if_metric;
de9bc7de KS	295	/*
	296	* Add route for the network.
	297	*/
4dcdd98e KS	298	if (scrub) {
	299	ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
	300	ns_ifscrub(ifp, ia);
	301	ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
	302	}
8b659320	303	if (ifp->if_flags & IFF_POINTOPOINT)
4dcdd98e KS	304	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST\|RTF_UP);
4dcdd98e KS	305	else {
e0737012	306	ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
4dcdd98e KS	307	rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
4dcdd98e KS	308	}
de9bc7de	309	ia->ia_flags \|= IFA_ROUTE;
8b659320	310	return (0);
de9bc7de KS	311	}
	312
	313	/*
	314	* Return address info for specified internet network.
	315	*/
	316	struct ns_ifaddr *
46aa06a9 KS	317	ns_iaonnetof(dst)
46aa06a9 KS	318	register struct ns_addr *dst;
de9bc7de KS	319	{
de9bc7de KS	320	register struct ns_ifaddr *ia;
46aa06a9	321	register struct ns_addr *compare;
8b659320 KS	322	register struct ifnet *ifp;
8b659320 KS	323	struct ns_ifaddr *ia_maybe = 0;
f1e269d4	324	union ns_net net = dst->x_net;
de9bc7de	325
46aa06a9	326	for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
8b659320 KS	327	if (ifp = ia->ia_ifp) {
	328	if (ifp->if_flags & IFF_POINTOPOINT) {
	329	compare = &satons_addr(ia->ia_dstaddr);
	330	if (ns_hosteq(dst, compare))
	331	return (ia);
e0737012	332	if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
8b659320 KS	333	ia_maybe = ia;
8b659320 KS	334	} else {
e0737012	335	if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
46aa06a9 KS	336	return (ia);
	337	}
	338	}
	339	}
	340	return (ia_maybe);
de9bc7de KS	341	}
de9bc7de KS	342	#endif