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
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
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 $
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/ioctl.h>
41 #include <sys/protosw.h>
42 #include <sys/errno.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
47 #include <net/route.h>
50 #include <netns/ns_if.h>
54 struct ns_ifaddr *ns_ifaddr;
56 extern struct sockaddr_ns ns_netmask, ns_hostmask;
59 * Generic internet control operations (ioctl's).
62 ns_control(so, cmd, data, ifp)
66 register struct ifnet *ifp;
68 register struct ifreq *ifr = (struct ifreq *)data;
69 register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
70 register struct ns_ifaddr *ia;
72 struct ns_ifaddr *oia;
73 int error, dstIsNew, hostIsNew;
76 * Find address for this interface, if it exists.
79 return (EADDRNOTAVAIL);
80 for (ia = ns_ifaddr; ia; ia = ia->ia_next)
81 if (ia->ia_ifp == ifp)
87 if (ia == (struct ns_ifaddr *)0)
88 return (EADDRNOTAVAIL);
89 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
94 if (ia == (struct ns_ifaddr *)0)
95 return (EADDRNOTAVAIL);
96 if ((ifp->if_flags & IFF_BROADCAST) == 0)
98 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
102 if (ia == (struct ns_ifaddr *)0)
103 return (EADDRNOTAVAIL);
104 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
106 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
110 if ((so->so_state & SS_PRIV) == 0)
116 if (ifra->ifra_addr.sns_family == AF_NS)
117 for (oia = ia; ia; ia = ia->ia_next) {
118 if (ia->ia_ifp == ifp &&
119 ns_neteq(ia->ia_addr.sns_addr,
120 ifra->ifra_addr.sns_addr))
123 if (cmd == SIOCDIFADDR && ia == 0)
124 return (EADDRNOTAVAIL);
129 if (ia == (struct ns_ifaddr *)0) {
130 oia = (struct ns_ifaddr *)
131 malloc(sizeof *ia, M_IFADDR, M_WAITOK);
132 if (oia == (struct ns_ifaddr *)NULL)
134 bzero((caddr_t)oia, sizeof(*oia));
135 if (ia = ns_ifaddr) {
136 for ( ; ia->ia_next; ia = ia->ia_next)
142 if (ifa = ifp->if_addrlist) {
143 for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
145 ifa->ifa_next = (struct ifaddr *) ia;
147 ifp->if_addrlist = (struct ifaddr *) ia;
149 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
151 ia->ia_ifa.ifa_netmask =
152 (struct sockaddr *)&ns_netmask;
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;
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, ia);
180 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
184 return (ns_ifinit(ifp, ia,
185 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
189 if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
190 ifp->if_addrlist = ifa->ifa_next;
192 while (ifa->ifa_next &&
193 (ifa->ifa_next != (struct ifaddr *)ia))
196 ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
198 printf("Couldn't unlink nsifaddr from ifp\n");
201 if (oia == (ia = ns_ifaddr)) {
202 ns_ifaddr = ia->ia_next;
204 while (ia->ia_next && (ia->ia_next != oia)) {
208 ia->ia_next = oia->ia_next;
210 printf("Didn't unlink nsifadr from list\n");
212 IFAFREE((&oia->ia_ifa));
213 if (0 == --ns_interfaces) {
215 * We reset to virginity and start all over again
217 ns_thishost = ns_zerohost;
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;
227 } else if (ns_neteq(ifra->ifra_addr.sns_addr,
228 ia->ia_addr.sns_addr))
231 if ((ifp->if_flags & IFF_POINTOPOINT) &&
232 (ifra->ifra_dstaddr.sns_family == AF_NS)) {
235 ia->ia_dstaddr = ifra->ifra_dstaddr;
238 if (ifra->ifra_addr.sns_family == AF_NS &&
239 (hostIsNew || dstIsNew))
240 error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
244 if (ifp->if_ioctl == 0)
246 return ((*ifp->if_ioctl)(ifp, cmd, data));
251 * Delete any previous route for an old address.
254 register struct ifnet *ifp;
255 register struct ns_ifaddr *ia;
257 if (ia->ia_flags & IFA_ROUTE) {
258 if (ifp->if_flags & IFF_POINTOPOINT) {
259 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
261 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
262 ia->ia_flags &= ~IFA_ROUTE;
266 * Initialize an interface's internet address
267 * and routing table entry.
269 ns_ifinit(ifp, ia, sns, scrub)
270 register struct ifnet *ifp;
271 register struct ns_ifaddr *ia;
272 register struct sockaddr_ns *sns;
274 struct sockaddr_ns oldaddr;
275 register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
276 int s = splimp(), error;
279 * Set up new addresses.
281 oldaddr = ia->ia_addr;
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
291 * Give the interface a chance to initialize
292 * if this is its first address,
293 * and to validate the address if necessary.
295 if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
297 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
298 ia->ia_addr = oldaddr;
303 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
304 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
307 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
308 ia->ia_addr = oldaddr;
312 if (!ns_hosteqnh(ns_thishost,*h)) {
313 ia->ia_addr = oldaddr;
318 ia->ia_addr = oldaddr;
322 ia->ia_ifa.ifa_metric = ifp->if_metric;
324 * Add route for the network.
327 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
329 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
331 if (ifp->if_flags & IFF_POINTOPOINT)
332 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
334 ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
335 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
337 ia->ia_flags |= IFA_ROUTE;
342 * Return address info for specified internet network.
346 register struct ns_addr *dst;
348 register struct ns_ifaddr *ia;
349 register struct ns_addr *compare;
350 register struct ifnet *ifp;
351 struct ns_ifaddr *ia_maybe = 0;
352 union ns_net net = dst->x_net;
354 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
355 if (ifp = ia->ia_ifp) {
356 if (ifp->if_flags & IFF_POINTOPOINT) {
357 compare = &satons_addr(ia->ia_dstaddr);
358 if (ns_hosteq(*dst, *compare))
360 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
363 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))