2 * Copyright (c) 1984, 1985, 1986, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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
33 * @(#)ns.c 8.2 (Berkeley) 11/15/93
34 * $FreeBSD: src/sys/netns/ns.c,v 1.9 1999/08/28 00:49:47 peter Exp $
35 * $DragonFly: src/sys/netproto/ns/ns.c,v 1.9 2004/06/07 07:04:33 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
42 #include <sys/sockio.h>
43 #include <sys/protosw.h>
44 #include <sys/errno.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
49 #include <net/route.h>
58 struct ns_ifaddr *ns_ifaddr;
61 extern struct sockaddr_ns ns_netmask, ns_hostmask;
64 * Generic internet control operations (ioctl's).
68 ns_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
71 struct ifreq *ifr = (struct ifreq *)data;
72 struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
74 struct ifaddr *ifa = NULL; /* XXX used ininitialized ?*/
75 struct ns_ifaddr *oia;
76 int dstIsNew, hostIsNew;
77 int error = 0; /* initalize because of scoping */
80 * Find address for this interface, if it exists.
83 return (EADDRNOTAVAIL);
84 for (ia = ns_ifaddr; ia; ia = ia->ia_next)
85 if (ia->ia_ifp == ifp)
91 if (ia == (struct ns_ifaddr *)0)
92 return (EADDRNOTAVAIL);
93 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
98 if (ia == (struct ns_ifaddr *)0)
99 return (EADDRNOTAVAIL);
100 if ((ifp->if_flags & IFF_BROADCAST) == 0)
102 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
106 if (ia == (struct ns_ifaddr *)0)
107 return (EADDRNOTAVAIL);
108 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
110 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
114 #ifdef NS_PRIV_SOCKETS
115 if ((so->so_state & SS_PRIV) == 0)
122 if (ifra->ifra_addr.sns_family == AF_NS)
123 for (oia = ia; ia; ia = ia->ia_next) {
124 if (ia->ia_ifp == ifp &&
125 ns_neteq(ia->ia_addr.sns_addr,
126 ifra->ifra_addr.sns_addr))
129 if (cmd == SIOCDIFADDR && ia == 0)
130 return (EADDRNOTAVAIL);
135 if (ia == (struct ns_ifaddr *)0) {
136 oia = (struct ns_ifaddr *)
137 malloc(sizeof *ia, M_IFADDR, M_WAITOK);
138 if (oia == (struct ns_ifaddr *)NULL)
140 bzero((caddr_t)oia, sizeof(*oia));
141 if ((ia = ns_ifaddr) != NULL) {
142 for ( ; ia->ia_next; ia = ia->ia_next)
149 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
151 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
153 ia->ia_ifa.ifa_netmask =
154 (struct sockaddr *)&ns_netmask;
156 ia->ia_ifa.ifa_dstaddr =
157 (struct sockaddr *)&ia->ia_dstaddr;
158 if (ifp->if_flags & IFF_BROADCAST) {
159 ia->ia_broadaddr.sns_family = AF_NS;
160 ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
161 ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
169 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
171 if (ia->ia_flags & IFA_ROUTE) {
172 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
173 ia->ia_flags &= ~IFA_ROUTE;
176 error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
178 (struct ucred *)NULL);
182 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
186 return (ns_ifinit(ifp, (struct ns_ifaddr *)ia,
187 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
190 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
191 /* XXX not on list */
193 TAILQ_REMOVE(&ifp->if_addrhead, (struct ifaddr *)ia, ifa_link);
194 if (oia == (ia = ns_ifaddr)) {
195 ns_ifaddr = ia->ia_next;
197 while (ia->ia_next && (ia->ia_next != oia)) {
201 ia->ia_next = oia->ia_next;
203 printf("Didn't unlink nsifadr from list\n");
205 IFAFREE((&oia->ia_ifa));
206 if (0 == --ns_interfaces) {
208 * We reset to virginity and start all over again
210 ns_thishost = ns_zerohost;
215 dstIsNew = 0; hostIsNew = 1;
216 if (ia->ia_addr.sns_family == AF_NS) {
217 if (ifra->ifra_addr.sns_len == 0) {
218 ifra->ifra_addr = ia->ia_addr;
220 } else if (ns_neteq(ifra->ifra_addr.sns_addr,
221 ia->ia_addr.sns_addr))
224 if ((ifp->if_flags & IFF_POINTOPOINT) &&
225 (ifra->ifra_dstaddr.sns_family == AF_NS)) {
227 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
228 ia->ia_dstaddr = ifra->ifra_dstaddr;
231 if (ifra->ifra_addr.sns_family == AF_NS &&
232 (hostIsNew || dstIsNew))
233 error = ns_ifinit(ifp, (struct ns_ifaddr *)ia,
234 &ifra->ifra_addr, 0);
238 if (ifp->if_ioctl == 0)
240 return ((*ifp->if_ioctl)(ifp, cmd, data, (struct ucred *)NULL));
245 * Delete any previous route for an old address.
250 struct ns_ifaddr *ia;
252 if (ia->ia_flags & IFA_ROUTE) {
253 if (ifp->if_flags & IFF_POINTOPOINT) {
254 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
256 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
257 ia->ia_flags &= ~IFA_ROUTE;
261 * Initialize an interface's internet address
262 * and routing table entry.
265 ns_ifinit(ifp, ia, sns, scrub)
267 struct ns_ifaddr *ia;
268 struct sockaddr_ns *sns;
271 struct sockaddr_ns oldaddr;
272 union ns_host *h = &ia->ia_addr.sns_addr.x_host;
273 int s = splimp(), error;
276 * Set up new addresses.
278 oldaddr = ia->ia_addr;
281 * The convention we shall adopt for naming is that
282 * a supplied address of zero means that "we don't care".
283 * if there is a single interface, use the address of that
284 * interface as our 6 byte host address.
285 * if there are multiple interfaces, use any address already
288 * Give the interface a chance to initialize
289 * if this is its first address,
290 * and to validate the address if necessary.
292 if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
294 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
296 (struct ucred *)NULL))) {
297 ia->ia_addr = oldaddr;
302 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
303 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
306 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
308 (struct ucred *)NULL))) {
309 ia->ia_addr = oldaddr;
313 if (!ns_hosteqnh(ns_thishost,*h)) {
314 ia->ia_addr = oldaddr;
319 ia->ia_addr = oldaddr;
323 ia->ia_ifa.ifa_metric = ifp->if_metric;
325 * Add route for the network.
328 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
330 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
332 if (ifp->if_flags & IFF_POINTOPOINT)
333 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
335 ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
336 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
338 ia->ia_flags |= IFA_ROUTE;
343 * Return address info for specified internet network.
349 struct ns_ifaddr *ia;
350 struct ns_addr *compare;
352 struct ns_ifaddr *ia_maybe = 0;
353 union ns_net net = dst->x_net;
355 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
356 if ((ifp = ia->ia_ifp) != NULL) {
357 if (ifp->if_flags & IFF_POINTOPOINT) {
358 compare = &satons_addr(ia->ia_dstaddr);
359 if (ns_hosteq(*dst, *compare))
361 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
364 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))