1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate /*
31*7c478bd9Sstevel@tonic-gate  * Portions of this source code were derived from Berkeley 4.3 BSD
32*7c478bd9Sstevel@tonic-gate  * under license from the Regents of the University of California.
33*7c478bd9Sstevel@tonic-gate  */
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
36*7c478bd9Sstevel@tonic-gate 
37*7c478bd9Sstevel@tonic-gate #include "defs.h"
38*7c478bd9Sstevel@tonic-gate 
39*7c478bd9Sstevel@tonic-gate #define	IF_SEPARATOR	':'
40*7c478bd9Sstevel@tonic-gate 
41*7c478bd9Sstevel@tonic-gate struct interface	*ifnet;
42*7c478bd9Sstevel@tonic-gate 
43*7c478bd9Sstevel@tonic-gate static int		setup_listen_sock(int ifindex);
44*7c478bd9Sstevel@tonic-gate static void		addrouteforif(struct interface *ifp);
45*7c478bd9Sstevel@tonic-gate static void		resetup_listen_sock(struct interface *, int);
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate /*
48*7c478bd9Sstevel@tonic-gate  * This is called at startup and after that, every CHECK_INTERVAL seconds or
49*7c478bd9Sstevel@tonic-gate  * when a SIGHUP is received.
50*7c478bd9Sstevel@tonic-gate  */
51*7c478bd9Sstevel@tonic-gate void
initifs(void)52*7c478bd9Sstevel@tonic-gate initifs(void)
53*7c478bd9Sstevel@tonic-gate {
54*7c478bd9Sstevel@tonic-gate 	static char *buf = NULL;
55*7c478bd9Sstevel@tonic-gate 	static uint_t maxbufsize = 0;
56*7c478bd9Sstevel@tonic-gate 	int bufsize;
57*7c478bd9Sstevel@tonic-gate 	int numifs;
58*7c478bd9Sstevel@tonic-gate 	struct lifnum lifn;
59*7c478bd9Sstevel@tonic-gate 	struct lifconf lifc;
60*7c478bd9Sstevel@tonic-gate 	struct lifreq lifr;
61*7c478bd9Sstevel@tonic-gate 	struct lifreq *lifrp;
62*7c478bd9Sstevel@tonic-gate 	int n;
63*7c478bd9Sstevel@tonic-gate 	struct interface ifs;
64*7c478bd9Sstevel@tonic-gate 	struct interface *ifp;
65*7c478bd9Sstevel@tonic-gate 	int netmaskchange = 0;
66*7c478bd9Sstevel@tonic-gate 	boolean_t changes = _B_FALSE;
67*7c478bd9Sstevel@tonic-gate 
68*7c478bd9Sstevel@tonic-gate 	lifn.lifn_family = AF_INET6;
69*7c478bd9Sstevel@tonic-gate 	lifn.lifn_flags = 0;
70*7c478bd9Sstevel@tonic-gate 	if (ioctl(iocsoc, SIOCGLIFNUM, (char *)&lifn) < 0) {
71*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR, "initifs: ioctl (get interface numbers): %m");
72*7c478bd9Sstevel@tonic-gate 		return;
73*7c478bd9Sstevel@tonic-gate 	}
74*7c478bd9Sstevel@tonic-gate 	numifs = lifn.lifn_count;
75*7c478bd9Sstevel@tonic-gate 	bufsize = numifs * sizeof (struct lifreq);
76*7c478bd9Sstevel@tonic-gate 
77*7c478bd9Sstevel@tonic-gate 	if (buf == NULL || bufsize > maxbufsize) {
78*7c478bd9Sstevel@tonic-gate 		if (buf != NULL)
79*7c478bd9Sstevel@tonic-gate 			free(buf);
80*7c478bd9Sstevel@tonic-gate 		maxbufsize = bufsize;
81*7c478bd9Sstevel@tonic-gate 		buf = (char *)malloc(maxbufsize);
82*7c478bd9Sstevel@tonic-gate 		if (buf == NULL) {
83*7c478bd9Sstevel@tonic-gate 			syslog(LOG_ERR, "initifs: out of memory");
84*7c478bd9Sstevel@tonic-gate 			return;
85*7c478bd9Sstevel@tonic-gate 		}
86*7c478bd9Sstevel@tonic-gate 	}
87*7c478bd9Sstevel@tonic-gate 
88*7c478bd9Sstevel@tonic-gate 	lifc.lifc_family = AF_INET6;
89*7c478bd9Sstevel@tonic-gate 	lifc.lifc_flags = 0;
90*7c478bd9Sstevel@tonic-gate 	lifc.lifc_len = bufsize;
91*7c478bd9Sstevel@tonic-gate 	lifc.lifc_buf = buf;
92*7c478bd9Sstevel@tonic-gate 	if (ioctl(iocsoc, SIOCGLIFCONF, (char *)&lifc) < 0) {
93*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
94*7c478bd9Sstevel@tonic-gate 		    "initifs: ioctl (get interface configuration): %m");
95*7c478bd9Sstevel@tonic-gate 		return;
96*7c478bd9Sstevel@tonic-gate 	}
97*7c478bd9Sstevel@tonic-gate 
98*7c478bd9Sstevel@tonic-gate 	/*
99*7c478bd9Sstevel@tonic-gate 	 * Mark all of the currently known interfaces in order to determine
100*7c478bd9Sstevel@tonic-gate 	 * which of the these interfaces no longer exist.
101*7c478bd9Sstevel@tonic-gate 	 */
102*7c478bd9Sstevel@tonic-gate 	for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next)
103*7c478bd9Sstevel@tonic-gate 		ifp->int_flags |= RIP6_IFF_MARKED;
104*7c478bd9Sstevel@tonic-gate 	lifrp = lifc.lifc_req;
105*7c478bd9Sstevel@tonic-gate 	for (n = lifc.lifc_len / sizeof (struct lifreq); n > 0; n--, lifrp++) {
106*7c478bd9Sstevel@tonic-gate 		bzero((char *)&ifs, sizeof (ifs));
107*7c478bd9Sstevel@tonic-gate 		(void) strncpy(lifr.lifr_name, lifrp->lifr_name,
108*7c478bd9Sstevel@tonic-gate 		    sizeof (lifr.lifr_name));
109*7c478bd9Sstevel@tonic-gate 		if (ioctl(iocsoc, SIOCGLIFFLAGS, (char *)&lifr) < 0) {
110*7c478bd9Sstevel@tonic-gate 			syslog(LOG_ERR,
111*7c478bd9Sstevel@tonic-gate 			    "initifs: ioctl (get interface flags): %m");
112*7c478bd9Sstevel@tonic-gate 			continue;
113*7c478bd9Sstevel@tonic-gate 		}
114*7c478bd9Sstevel@tonic-gate 		if (!(lifr.lifr_flags & IFF_IPV6) ||
115*7c478bd9Sstevel@tonic-gate 		    !(lifr.lifr_flags & IFF_MULTICAST) ||
116*7c478bd9Sstevel@tonic-gate 		    (lifr.lifr_flags & IFF_LOOPBACK))
117*7c478bd9Sstevel@tonic-gate 			continue;
118*7c478bd9Sstevel@tonic-gate 
119*7c478bd9Sstevel@tonic-gate 		ifp = if_ifwithname(lifr.lifr_name);
120*7c478bd9Sstevel@tonic-gate 		if (ifp != NULL)
121*7c478bd9Sstevel@tonic-gate 			ifp->int_flags &= ~RIP6_IFF_MARKED;
122*7c478bd9Sstevel@tonic-gate 		if (lifr.lifr_flags & IFF_POINTOPOINT)
123*7c478bd9Sstevel@tonic-gate 			ifs.int_flags |= RIP6_IFF_POINTOPOINT;
124*7c478bd9Sstevel@tonic-gate 		if (lifr.lifr_flags & IFF_NORTEXCH)
125*7c478bd9Sstevel@tonic-gate 			ifs.int_flags |= RIP6_IFF_NORTEXCH;
126*7c478bd9Sstevel@tonic-gate 		if (lifr.lifr_flags & IFF_PRIVATE)
127*7c478bd9Sstevel@tonic-gate 			ifs.int_flags |= RIP6_IFF_PRIVATE;
128*7c478bd9Sstevel@tonic-gate 		if (lifr.lifr_flags & IFF_UP) {
129*7c478bd9Sstevel@tonic-gate 			ifs.int_flags |= RIP6_IFF_UP;
130*7c478bd9Sstevel@tonic-gate 		} else {
131*7c478bd9Sstevel@tonic-gate 			if (ifp != NULL) {
132*7c478bd9Sstevel@tonic-gate 				if (ifp->int_flags & RIP6_IFF_UP) {
133*7c478bd9Sstevel@tonic-gate 					/*
134*7c478bd9Sstevel@tonic-gate 					 * If there is an transition from up to
135*7c478bd9Sstevel@tonic-gate 					 * down for an exisiting interface,
136*7c478bd9Sstevel@tonic-gate 					 * increment the counter.
137*7c478bd9Sstevel@tonic-gate 					 */
138*7c478bd9Sstevel@tonic-gate 					ifp->int_transitions++;
139*7c478bd9Sstevel@tonic-gate 					changes = _B_TRUE;
140*7c478bd9Sstevel@tonic-gate 				}
141*7c478bd9Sstevel@tonic-gate 				if_purge(ifp);
142*7c478bd9Sstevel@tonic-gate 			}
143*7c478bd9Sstevel@tonic-gate 			continue;
144*7c478bd9Sstevel@tonic-gate 		}
145*7c478bd9Sstevel@tonic-gate 
146*7c478bd9Sstevel@tonic-gate 		if (ifs.int_flags & RIP6_IFF_POINTOPOINT) {
147*7c478bd9Sstevel@tonic-gate 			/*
148*7c478bd9Sstevel@tonic-gate 			 * For point-to-point interfaces, retrieve both the
149*7c478bd9Sstevel@tonic-gate 			 * local and the remote addresses.
150*7c478bd9Sstevel@tonic-gate 			 */
151*7c478bd9Sstevel@tonic-gate 			if (ioctl(iocsoc, SIOCGLIFADDR, (char *)&lifr) < 0) {
152*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR,
153*7c478bd9Sstevel@tonic-gate 				    "initifs: ioctl (get interface address): "
154*7c478bd9Sstevel@tonic-gate 				    "%m");
155*7c478bd9Sstevel@tonic-gate 				continue;
156*7c478bd9Sstevel@tonic-gate 			}
157*7c478bd9Sstevel@tonic-gate 			ifs.int_addr =
158*7c478bd9Sstevel@tonic-gate 			    ((struct sockaddr_in6 *)&lifr.lifr_addr)->sin6_addr;
159*7c478bd9Sstevel@tonic-gate 			if (ioctl(iocsoc, SIOCGLIFDSTADDR, (char *)&lifr) < 0) {
160*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR,
161*7c478bd9Sstevel@tonic-gate 				    "initifs: ioctl (get destination address): "
162*7c478bd9Sstevel@tonic-gate 				    "%m");
163*7c478bd9Sstevel@tonic-gate 				continue;
164*7c478bd9Sstevel@tonic-gate 			}
165*7c478bd9Sstevel@tonic-gate 			ifs.int_dstaddr = ((struct sockaddr_in6 *)
166*7c478bd9Sstevel@tonic-gate 			    &lifr.lifr_dstaddr)->sin6_addr;
167*7c478bd9Sstevel@tonic-gate 			ifs.int_prefix_length = IPV6_ABITS;
168*7c478bd9Sstevel@tonic-gate 		} else {
169*7c478bd9Sstevel@tonic-gate 			/*
170*7c478bd9Sstevel@tonic-gate 			 * For other interfaces, retreieve the prefix (including
171*7c478bd9Sstevel@tonic-gate 			 * the prefix length.
172*7c478bd9Sstevel@tonic-gate 			 */
173*7c478bd9Sstevel@tonic-gate 			if (ioctl(iocsoc, SIOCGLIFSUBNET, (char *)&lifr) < 0) {
174*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR,
175*7c478bd9Sstevel@tonic-gate 				    "initifs: ioctl (get subnet prefix): %m");
176*7c478bd9Sstevel@tonic-gate 				continue;
177*7c478bd9Sstevel@tonic-gate 			}
178*7c478bd9Sstevel@tonic-gate 			/*
179*7c478bd9Sstevel@tonic-gate 			 * This should never happen but check for it in any case
180*7c478bd9Sstevel@tonic-gate 			 * since the kernel stores it as an signed integer.
181*7c478bd9Sstevel@tonic-gate 			 */
182*7c478bd9Sstevel@tonic-gate 			if (lifr.lifr_addrlen < 0 ||
183*7c478bd9Sstevel@tonic-gate 			    lifr.lifr_addrlen > IPV6_ABITS) {
184*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR,
185*7c478bd9Sstevel@tonic-gate 				    "initifs: ioctl (get subnet prefix) "
186*7c478bd9Sstevel@tonic-gate 				    "returned invalid prefix length of %d",
187*7c478bd9Sstevel@tonic-gate 				    lifr.lifr_addrlen);
188*7c478bd9Sstevel@tonic-gate 				continue;
189*7c478bd9Sstevel@tonic-gate 			}
190*7c478bd9Sstevel@tonic-gate 			ifs.int_prefix_length = lifr.lifr_addrlen;
191*7c478bd9Sstevel@tonic-gate 			ifs.int_addr = ((struct sockaddr_in6 *)
192*7c478bd9Sstevel@tonic-gate 			    &lifr.lifr_subnet)->sin6_addr;
193*7c478bd9Sstevel@tonic-gate 		}
194*7c478bd9Sstevel@tonic-gate 
195*7c478bd9Sstevel@tonic-gate 		if (ioctl(iocsoc, SIOCGLIFMETRIC, (char *)&lifr) < 0 ||
196*7c478bd9Sstevel@tonic-gate 		    lifr.lifr_metric < 0)
197*7c478bd9Sstevel@tonic-gate 			ifs.int_metric = 1;
198*7c478bd9Sstevel@tonic-gate 		else
199*7c478bd9Sstevel@tonic-gate 			ifs.int_metric = lifr.lifr_metric + 1;
200*7c478bd9Sstevel@tonic-gate 
201*7c478bd9Sstevel@tonic-gate 		if (ioctl(iocsoc, SIOCGLIFINDEX, (char *)&lifr) < 0) {
202*7c478bd9Sstevel@tonic-gate 			syslog(LOG_ERR, "initifs: ioctl (get index): %m");
203*7c478bd9Sstevel@tonic-gate 			continue;
204*7c478bd9Sstevel@tonic-gate 		}
205*7c478bd9Sstevel@tonic-gate 		ifs.int_ifindex = lifr.lifr_index;
206*7c478bd9Sstevel@tonic-gate 
207*7c478bd9Sstevel@tonic-gate 		if (ioctl(iocsoc, SIOCGLIFMTU, (char *)&lifr) < 0) {
208*7c478bd9Sstevel@tonic-gate 			syslog(LOG_ERR, "initifs: ioctl (get mtu): %m");
209*7c478bd9Sstevel@tonic-gate 			continue;
210*7c478bd9Sstevel@tonic-gate 		}
211*7c478bd9Sstevel@tonic-gate 
212*7c478bd9Sstevel@tonic-gate 		/*
213*7c478bd9Sstevel@tonic-gate 		 * If the interface's recorded MTU doesn't make sense, use
214*7c478bd9Sstevel@tonic-gate 		 * IPV6_MIN_MTU instead.
215*7c478bd9Sstevel@tonic-gate 		 */
216*7c478bd9Sstevel@tonic-gate 		if (lifr.lifr_mtu < IPV6_MIN_MTU)
217*7c478bd9Sstevel@tonic-gate 			ifs.int_mtu = IPV6_MIN_MTU;
218*7c478bd9Sstevel@tonic-gate 		else
219*7c478bd9Sstevel@tonic-gate 			ifs.int_mtu = lifr.lifr_mtu;
220*7c478bd9Sstevel@tonic-gate 
221*7c478bd9Sstevel@tonic-gate 		if (ifp != NULL) {
222*7c478bd9Sstevel@tonic-gate 			/*
223*7c478bd9Sstevel@tonic-gate 			 * RIP6_IFF_NORTEXCH flag change by itself shouldn't
224*7c478bd9Sstevel@tonic-gate 			 * cause an if_purge() call, which also purges all the
225*7c478bd9Sstevel@tonic-gate 			 * routes heard off this interface. So, let's suppress
226*7c478bd9Sstevel@tonic-gate 			 * changes of RIP6_IFF_NORTEXCH	in the following
227*7c478bd9Sstevel@tonic-gate 			 * comparisons.
228*7c478bd9Sstevel@tonic-gate 			 */
229*7c478bd9Sstevel@tonic-gate 			if (ifp->int_prefix_length == ifs.int_prefix_length &&
230*7c478bd9Sstevel@tonic-gate 			    ((ifp->int_flags | RIP6_IFF_NORTEXCH) ==
231*7c478bd9Sstevel@tonic-gate 			    (ifs.int_flags | RIP6_IFF_NORTEXCH)) &&
232*7c478bd9Sstevel@tonic-gate 			    ifp->int_metric == ifs.int_metric &&
233*7c478bd9Sstevel@tonic-gate 			    ifp->int_ifindex == ifs.int_ifindex) {
234*7c478bd9Sstevel@tonic-gate 				/*
235*7c478bd9Sstevel@tonic-gate 				 * Now let's make sure we capture the latest
236*7c478bd9Sstevel@tonic-gate 				 * value of RIP6_IFF_NORTEXCH flag.
237*7c478bd9Sstevel@tonic-gate 				 */
238*7c478bd9Sstevel@tonic-gate 				if (ifs.int_flags & RIP6_IFF_NORTEXCH)
239*7c478bd9Sstevel@tonic-gate 					ifp->int_flags |= RIP6_IFF_NORTEXCH;
240*7c478bd9Sstevel@tonic-gate 				else
241*7c478bd9Sstevel@tonic-gate 					ifp->int_flags &= ~RIP6_IFF_NORTEXCH;
242*7c478bd9Sstevel@tonic-gate 
243*7c478bd9Sstevel@tonic-gate 				if (!(ifp->int_flags & RIP6_IFF_POINTOPOINT) &&
244*7c478bd9Sstevel@tonic-gate 				    IN6_ARE_ADDR_EQUAL(&ifp->int_addr,
245*7c478bd9Sstevel@tonic-gate 					&ifs.int_addr))
246*7c478bd9Sstevel@tonic-gate 					continue;
247*7c478bd9Sstevel@tonic-gate 				if ((ifp->int_flags & RIP6_IFF_POINTOPOINT) &&
248*7c478bd9Sstevel@tonic-gate 				    IN6_ARE_ADDR_EQUAL(&ifp->int_dstaddr,
249*7c478bd9Sstevel@tonic-gate 					&ifs.int_dstaddr))
250*7c478bd9Sstevel@tonic-gate 					continue;
251*7c478bd9Sstevel@tonic-gate 			}
252*7c478bd9Sstevel@tonic-gate 			if_purge(ifp);
253*7c478bd9Sstevel@tonic-gate 			if (ifp->int_prefix_length != ifs.int_prefix_length)
254*7c478bd9Sstevel@tonic-gate 				netmaskchange = 1;
255*7c478bd9Sstevel@tonic-gate 			ifp->int_addr = ifs.int_addr;
256*7c478bd9Sstevel@tonic-gate 			ifp->int_dstaddr = ifs.int_dstaddr;
257*7c478bd9Sstevel@tonic-gate 			ifp->int_metric = ifs.int_metric;
258*7c478bd9Sstevel@tonic-gate 			/*
259*7c478bd9Sstevel@tonic-gate 			 * If there is an transition from down to up for an
260*7c478bd9Sstevel@tonic-gate 			 * exisiting interface, increment the counter.
261*7c478bd9Sstevel@tonic-gate 			 */
262*7c478bd9Sstevel@tonic-gate 			if (!(ifp->int_flags & RIP6_IFF_UP) &&
263*7c478bd9Sstevel@tonic-gate 			    (ifs.int_flags & RIP6_IFF_UP))
264*7c478bd9Sstevel@tonic-gate 				ifp->int_transitions++;
265*7c478bd9Sstevel@tonic-gate 			ifp->int_flags |= ifs.int_flags;
266*7c478bd9Sstevel@tonic-gate 			ifp->int_prefix_length = ifs.int_prefix_length;
267*7c478bd9Sstevel@tonic-gate 
268*7c478bd9Sstevel@tonic-gate 			/*
269*7c478bd9Sstevel@tonic-gate 			 * If the interface index has changed, we may need to
270*7c478bd9Sstevel@tonic-gate 			 * set up the listen socket again.
271*7c478bd9Sstevel@tonic-gate 			 */
272*7c478bd9Sstevel@tonic-gate 			if (ifp->int_ifindex != ifs.int_ifindex) {
273*7c478bd9Sstevel@tonic-gate 				if (ifp->int_sock != -1) {
274*7c478bd9Sstevel@tonic-gate 					resetup_listen_sock(ifp,
275*7c478bd9Sstevel@tonic-gate 					    ifs.int_ifindex);
276*7c478bd9Sstevel@tonic-gate 				}
277*7c478bd9Sstevel@tonic-gate 				ifp->int_ifindex = ifs.int_ifindex;
278*7c478bd9Sstevel@tonic-gate 			}
279*7c478bd9Sstevel@tonic-gate 
280*7c478bd9Sstevel@tonic-gate 			ifp->int_mtu = ifs.int_mtu;
281*7c478bd9Sstevel@tonic-gate 		} else {
282*7c478bd9Sstevel@tonic-gate 			char *cp;
283*7c478bd9Sstevel@tonic-gate 			int log_num;
284*7c478bd9Sstevel@tonic-gate 
285*7c478bd9Sstevel@tonic-gate 			ifp = (struct interface *)
286*7c478bd9Sstevel@tonic-gate 			    malloc(sizeof (struct interface));
287*7c478bd9Sstevel@tonic-gate 			if (ifp == NULL) {
288*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR, "initifs: out of memory");
289*7c478bd9Sstevel@tonic-gate 				return;
290*7c478bd9Sstevel@tonic-gate 			}
291*7c478bd9Sstevel@tonic-gate 			*ifp = ifs;
292*7c478bd9Sstevel@tonic-gate 			ifp->int_name = ifp->int_ifbase = NULL;
293*7c478bd9Sstevel@tonic-gate 			ifp->int_name =
294*7c478bd9Sstevel@tonic-gate 			    (char *)malloc((size_t)strlen(lifr.lifr_name) + 1);
295*7c478bd9Sstevel@tonic-gate 			if (ifp->int_name == NULL) {
296*7c478bd9Sstevel@tonic-gate 				free(ifp);
297*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR, "initifs: out of memory");
298*7c478bd9Sstevel@tonic-gate 				return;
299*7c478bd9Sstevel@tonic-gate 			}
300*7c478bd9Sstevel@tonic-gate 			(void) strcpy(ifp->int_name, lifr.lifr_name);
301*7c478bd9Sstevel@tonic-gate 			ifp->int_ifbase =
302*7c478bd9Sstevel@tonic-gate 			    (char *)malloc((size_t)strlen(lifr.lifr_name) + 1);
303*7c478bd9Sstevel@tonic-gate 			if (ifp->int_ifbase == NULL) {
304*7c478bd9Sstevel@tonic-gate 				free(ifp->int_name);
305*7c478bd9Sstevel@tonic-gate 				free(ifp);
306*7c478bd9Sstevel@tonic-gate 				syslog(LOG_ERR, "initifs: out of memory");
307*7c478bd9Sstevel@tonic-gate 				return;
308*7c478bd9Sstevel@tonic-gate 			}
309*7c478bd9Sstevel@tonic-gate 			(void) strcpy(ifp->int_ifbase, lifr.lifr_name);
310*7c478bd9Sstevel@tonic-gate 			cp = (char *)index(ifp->int_ifbase, IF_SEPARATOR);
311*7c478bd9Sstevel@tonic-gate 			if (cp != NULL) {
312*7c478bd9Sstevel@tonic-gate 				/*
313*7c478bd9Sstevel@tonic-gate 				 * Verify that the value following the separator
314*7c478bd9Sstevel@tonic-gate 				 * is an integer greater than zero (the only
315*7c478bd9Sstevel@tonic-gate 				 * possible value for a logical interface).
316*7c478bd9Sstevel@tonic-gate 				 */
317*7c478bd9Sstevel@tonic-gate 				log_num = atoi((char *)(cp + 1));
318*7c478bd9Sstevel@tonic-gate 				if (log_num <= 0) {
319*7c478bd9Sstevel@tonic-gate 					free(ifp->int_ifbase);
320*7c478bd9Sstevel@tonic-gate 					free(ifp->int_name);
321*7c478bd9Sstevel@tonic-gate 					free(ifp);
322*7c478bd9Sstevel@tonic-gate 					syslog(LOG_ERR,
323*7c478bd9Sstevel@tonic-gate 					    "initifs: interface name %s could "
324*7c478bd9Sstevel@tonic-gate 					    "not be parsed", ifp->int_name);
325*7c478bd9Sstevel@tonic-gate 					return;
326*7c478bd9Sstevel@tonic-gate 				}
327*7c478bd9Sstevel@tonic-gate 				*cp = '\0';
328*7c478bd9Sstevel@tonic-gate 			} else {
329*7c478bd9Sstevel@tonic-gate 				log_num = 0;
330*7c478bd9Sstevel@tonic-gate 			}
331*7c478bd9Sstevel@tonic-gate 			if (log_num == 0) {
332*7c478bd9Sstevel@tonic-gate 				ifp->int_sock =
333*7c478bd9Sstevel@tonic-gate 				    setup_listen_sock(ifp->int_ifindex);
334*7c478bd9Sstevel@tonic-gate 			} else {
335*7c478bd9Sstevel@tonic-gate 				ifp->int_sock = -1;
336*7c478bd9Sstevel@tonic-gate 			}
337*7c478bd9Sstevel@tonic-gate 			ifp->int_next = ifnet;
338*7c478bd9Sstevel@tonic-gate 			ifnet = ifp;
339*7c478bd9Sstevel@tonic-gate 			traceinit(ifp);
340*7c478bd9Sstevel@tonic-gate 		}
341*7c478bd9Sstevel@tonic-gate 		addrouteforif(ifp);
342*7c478bd9Sstevel@tonic-gate 		changes = _B_TRUE;
343*7c478bd9Sstevel@tonic-gate 	}
344*7c478bd9Sstevel@tonic-gate 
345*7c478bd9Sstevel@tonic-gate 	/*
346*7c478bd9Sstevel@tonic-gate 	 * Any remaining interfaces that are still marked and which were in an
347*7c478bd9Sstevel@tonic-gate 	 * up state (RIP6_IFF_UP) need to removed from the routing table.
348*7c478bd9Sstevel@tonic-gate 	 */
349*7c478bd9Sstevel@tonic-gate 	for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) {
350*7c478bd9Sstevel@tonic-gate 		if ((ifp->int_flags & (RIP6_IFF_MARKED | RIP6_IFF_UP)) ==
351*7c478bd9Sstevel@tonic-gate 		    (RIP6_IFF_MARKED | RIP6_IFF_UP)) {
352*7c478bd9Sstevel@tonic-gate 			if_purge(ifp);
353*7c478bd9Sstevel@tonic-gate 			ifp->int_flags &= ~RIP6_IFF_MARKED;
354*7c478bd9Sstevel@tonic-gate 			changes = _B_TRUE;
355*7c478bd9Sstevel@tonic-gate 		}
356*7c478bd9Sstevel@tonic-gate 	}
357*7c478bd9Sstevel@tonic-gate 	if (netmaskchange)
358*7c478bd9Sstevel@tonic-gate 		rtchangeall();
359*7c478bd9Sstevel@tonic-gate 	if (supplier & changes)
360*7c478bd9Sstevel@tonic-gate 		dynamic_update((struct interface *)NULL);
361*7c478bd9Sstevel@tonic-gate }
362*7c478bd9Sstevel@tonic-gate 
363*7c478bd9Sstevel@tonic-gate static void
addrouteforif(struct interface * ifp)364*7c478bd9Sstevel@tonic-gate addrouteforif(struct interface *ifp)
365*7c478bd9Sstevel@tonic-gate {
366*7c478bd9Sstevel@tonic-gate 	struct rt_entry *rt;
367*7c478bd9Sstevel@tonic-gate 	struct in6_addr *dst;
368*7c478bd9Sstevel@tonic-gate 
369*7c478bd9Sstevel@tonic-gate 	if (ifp->int_flags & RIP6_IFF_POINTOPOINT)
370*7c478bd9Sstevel@tonic-gate 		dst = &ifp->int_dstaddr;
371*7c478bd9Sstevel@tonic-gate 	else
372*7c478bd9Sstevel@tonic-gate 		dst = &ifp->int_addr;
373*7c478bd9Sstevel@tonic-gate 
374*7c478bd9Sstevel@tonic-gate 	rt = rtlookup(dst, ifp->int_prefix_length);
375*7c478bd9Sstevel@tonic-gate 
376*7c478bd9Sstevel@tonic-gate 	if (rt != NULL) {
377*7c478bd9Sstevel@tonic-gate 		if (rt->rt_state & RTS_INTERFACE)
378*7c478bd9Sstevel@tonic-gate 			return;
379*7c478bd9Sstevel@tonic-gate 		rtdelete(rt);
380*7c478bd9Sstevel@tonic-gate 	}
381*7c478bd9Sstevel@tonic-gate 	rtadd(dst, &ifp->int_addr, ifp->int_prefix_length, ifp->int_metric, 0,
382*7c478bd9Sstevel@tonic-gate 	    _B_TRUE, ifp);
383*7c478bd9Sstevel@tonic-gate }
384*7c478bd9Sstevel@tonic-gate 
385*7c478bd9Sstevel@tonic-gate static int
setup_listen_sock(int ifindex)386*7c478bd9Sstevel@tonic-gate setup_listen_sock(int ifindex)
387*7c478bd9Sstevel@tonic-gate {
388*7c478bd9Sstevel@tonic-gate 	int sock;
389*7c478bd9Sstevel@tonic-gate 	struct sockaddr_in6 sin6;
390*7c478bd9Sstevel@tonic-gate 	uint_t hops;
391*7c478bd9Sstevel@tonic-gate 	struct ipv6_mreq allrouters_mreq;
392*7c478bd9Sstevel@tonic-gate 	int on = 1;
393*7c478bd9Sstevel@tonic-gate 	int off = 0;
394*7c478bd9Sstevel@tonic-gate 	int recvsize;
395*7c478bd9Sstevel@tonic-gate 
396*7c478bd9Sstevel@tonic-gate 	sock = socket(AF_INET6, SOCK_DGRAM, 0);
397*7c478bd9Sstevel@tonic-gate 	if (sock == -1)
398*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
399*7c478bd9Sstevel@tonic-gate 
400*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_BOUND_IF, (char *)&ifindex,
401*7c478bd9Sstevel@tonic-gate 	    sizeof (ifindex)) < 0) {
402*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
403*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: IPV6_BOUND_IF: %m");
404*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
405*7c478bd9Sstevel@tonic-gate 	}
406*7c478bd9Sstevel@tonic-gate 
407*7c478bd9Sstevel@tonic-gate 	hops = IPV6_MAX_HOPS;
408*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (char *)&hops,
409*7c478bd9Sstevel@tonic-gate 	    sizeof (hops)) < 0) {
410*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
411*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: IPV6_UNICAST_HOPS: %m");
412*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
413*7c478bd9Sstevel@tonic-gate 	}
414*7c478bd9Sstevel@tonic-gate 
415*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (char *)&hops,
416*7c478bd9Sstevel@tonic-gate 	    sizeof (hops)) < 0) {
417*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
418*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: IPV6_MULTICAST_HOPS: %m");
419*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
420*7c478bd9Sstevel@tonic-gate 	}
421*7c478bd9Sstevel@tonic-gate 
422*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (char *)&off,
423*7c478bd9Sstevel@tonic-gate 	    sizeof (off)) < 0) {
424*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
425*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: IPV6_MULTICAST_LOOP: %m");
426*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
427*7c478bd9Sstevel@tonic-gate 	}
428*7c478bd9Sstevel@tonic-gate 
429*7c478bd9Sstevel@tonic-gate 	allrouters_mreq.ipv6mr_multiaddr = allrouters_in6;
430*7c478bd9Sstevel@tonic-gate 	allrouters_mreq.ipv6mr_interface = ifindex;
431*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
432*7c478bd9Sstevel@tonic-gate 	    (char *)&allrouters_mreq, sizeof (allrouters_mreq)) < 0) {
433*7c478bd9Sstevel@tonic-gate 		if (errno != EADDRINUSE) {
434*7c478bd9Sstevel@tonic-gate 			syslog(LOG_ERR,
435*7c478bd9Sstevel@tonic-gate 			    "setup_listen_sock: setsockopt: "
436*7c478bd9Sstevel@tonic-gate 			    "IPV6_JOIN_GROUP: %m");
437*7c478bd9Sstevel@tonic-gate 			goto sock_fail;
438*7c478bd9Sstevel@tonic-gate 		}
439*7c478bd9Sstevel@tonic-gate 	}
440*7c478bd9Sstevel@tonic-gate 
441*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, (char *)&on,
442*7c478bd9Sstevel@tonic-gate 	    sizeof (off)) < 0) {
443*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
444*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: IPV6_RECVHOPLIMIT: %m");
445*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
446*7c478bd9Sstevel@tonic-gate 	}
447*7c478bd9Sstevel@tonic-gate 
448*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
449*7c478bd9Sstevel@tonic-gate 	    sizeof (on)) < 0) {
450*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR,
451*7c478bd9Sstevel@tonic-gate 		    "setup_listen_sock: setsockopt: SO_REUSEADDR: %m");
452*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
453*7c478bd9Sstevel@tonic-gate 	}
454*7c478bd9Sstevel@tonic-gate 
455*7c478bd9Sstevel@tonic-gate 	recvsize = RCVBUFSIZ;
456*7c478bd9Sstevel@tonic-gate 	if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&recvsize,
457*7c478bd9Sstevel@tonic-gate 	    sizeof (int)) < 0) {
458*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR, "setup_listen_sock: setsockopt: SO_RCVBUF: %m");
459*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
460*7c478bd9Sstevel@tonic-gate 	}
461*7c478bd9Sstevel@tonic-gate 
462*7c478bd9Sstevel@tonic-gate 	bzero((char *)&sin6, sizeof (sin6));
463*7c478bd9Sstevel@tonic-gate 	sin6.sin6_family = AF_INET6;
464*7c478bd9Sstevel@tonic-gate 	sin6.sin6_port = rip6_port;
465*7c478bd9Sstevel@tonic-gate 	if (bind(sock, (struct sockaddr *)&sin6, sizeof (sin6)) < 0) {
466*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR, "setup_listen_sock: bind: %m");
467*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
468*7c478bd9Sstevel@tonic-gate 	}
469*7c478bd9Sstevel@tonic-gate 
470*7c478bd9Sstevel@tonic-gate 	poll_ifs_num++;
471*7c478bd9Sstevel@tonic-gate 	if (poll_ifs == NULL) {
472*7c478bd9Sstevel@tonic-gate 		poll_ifs = (struct pollfd *)
473*7c478bd9Sstevel@tonic-gate 		    malloc(max_poll_ifs * sizeof (struct pollfd));
474*7c478bd9Sstevel@tonic-gate 	} else if (poll_ifs_num > max_poll_ifs) {
475*7c478bd9Sstevel@tonic-gate 		max_poll_ifs *= 2;
476*7c478bd9Sstevel@tonic-gate 		poll_ifs = (struct pollfd *)realloc((char *)poll_ifs,
477*7c478bd9Sstevel@tonic-gate 		    max_poll_ifs * sizeof (struct pollfd));
478*7c478bd9Sstevel@tonic-gate 	}
479*7c478bd9Sstevel@tonic-gate 	if (poll_ifs == NULL) {
480*7c478bd9Sstevel@tonic-gate 		syslog(LOG_ERR, "setup_listen_sock: out of memory");
481*7c478bd9Sstevel@tonic-gate 		goto sock_fail;
482*7c478bd9Sstevel@tonic-gate 	}
483*7c478bd9Sstevel@tonic-gate 
484*7c478bd9Sstevel@tonic-gate 	poll_ifs[poll_ifs_num - 1].fd = sock;
485*7c478bd9Sstevel@tonic-gate 	poll_ifs[poll_ifs_num - 1].events = POLLIN;
486*7c478bd9Sstevel@tonic-gate 	return (sock);
487*7c478bd9Sstevel@tonic-gate 
488*7c478bd9Sstevel@tonic-gate sock_fail:
489*7c478bd9Sstevel@tonic-gate 	if (sock > 0)
490*7c478bd9Sstevel@tonic-gate 		(void) close(sock);
491*7c478bd9Sstevel@tonic-gate 	return (-1);
492*7c478bd9Sstevel@tonic-gate }
493*7c478bd9Sstevel@tonic-gate 
494*7c478bd9Sstevel@tonic-gate /*
495*7c478bd9Sstevel@tonic-gate  * resetup_listen_sock is primarily used in the case where a tunnel was
496*7c478bd9Sstevel@tonic-gate  * plumbed, unplumbed, then plumbed again.  This would cause the binding set by
497*7c478bd9Sstevel@tonic-gate  * IPV6_BOUND_IF to be useless, and sends to the associated socket will be
498*7c478bd9Sstevel@tonic-gate  * transmitted on the wrong interface.  resetup_listen_sock
499*7c478bd9Sstevel@tonic-gate  *	closes the socket,
500*7c478bd9Sstevel@tonic-gate  *	removes the socket from poll_ifs[]
501*7c478bd9Sstevel@tonic-gate  *	plugs the hole in poll_ifs[]
502*7c478bd9Sstevel@tonic-gate  *	calls setup_listen_sock to set up the socket again
503*7c478bd9Sstevel@tonic-gate  */
504*7c478bd9Sstevel@tonic-gate void
resetup_listen_sock(struct interface * ifp,int newindex)505*7c478bd9Sstevel@tonic-gate resetup_listen_sock(struct interface *ifp, int newindex)
506*7c478bd9Sstevel@tonic-gate {
507*7c478bd9Sstevel@tonic-gate 	int i;
508*7c478bd9Sstevel@tonic-gate 
509*7c478bd9Sstevel@tonic-gate 	(void) close(ifp->int_sock);
510*7c478bd9Sstevel@tonic-gate 
511*7c478bd9Sstevel@tonic-gate 	/* Remove socket from poll_ifs[]. */
512*7c478bd9Sstevel@tonic-gate 	for (i = poll_ifs_num - 1; i >= 0; i--) {
513*7c478bd9Sstevel@tonic-gate 
514*7c478bd9Sstevel@tonic-gate 		if (poll_ifs[i].fd == ifp->int_sock) {
515*7c478bd9Sstevel@tonic-gate 
516*7c478bd9Sstevel@tonic-gate 			poll_ifs[i].fd = 0;
517*7c478bd9Sstevel@tonic-gate 			poll_ifs[i].events = 0;
518*7c478bd9Sstevel@tonic-gate 
519*7c478bd9Sstevel@tonic-gate 			/*
520*7c478bd9Sstevel@tonic-gate 			 * Remove hole in poll_ifs.  Possibly exchange
521*7c478bd9Sstevel@tonic-gate 			 * poll_ifs[i] with poll_ifs[poll_ifs_num-1].
522*7c478bd9Sstevel@tonic-gate 			 */
523*7c478bd9Sstevel@tonic-gate 			if (i != poll_ifs_num - 1) {
524*7c478bd9Sstevel@tonic-gate 				poll_ifs[i] = poll_ifs[poll_ifs_num - 1];
525*7c478bd9Sstevel@tonic-gate 				poll_ifs[poll_ifs_num - 1].fd = 0;
526*7c478bd9Sstevel@tonic-gate 				poll_ifs[poll_ifs_num - 1].events = 0;
527*7c478bd9Sstevel@tonic-gate 			}
528*7c478bd9Sstevel@tonic-gate 			poll_ifs_num--;
529*7c478bd9Sstevel@tonic-gate 
530*7c478bd9Sstevel@tonic-gate 			/* Now set everything up again. */
531*7c478bd9Sstevel@tonic-gate 			ifp->int_sock = setup_listen_sock(newindex);
532*7c478bd9Sstevel@tonic-gate 			break;
533*7c478bd9Sstevel@tonic-gate 		}
534*7c478bd9Sstevel@tonic-gate 	}
535*7c478bd9Sstevel@tonic-gate }
536