2 * Copyright (c) 1984, 1985, 1986, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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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
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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.
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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 1.8 2004/05/04 11:54:40 hmp 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(so, cmd, data, ifp)
74 struct ifreq *ifr = (struct ifreq *)data;
75 struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
77 struct ifaddr *ifa = NULL; /* XXX used ininitialized ?*/
78 struct ns_ifaddr *oia;
79 int dstIsNew, hostIsNew;
80 int error = 0; /* initalize because of scoping */
83 * Find address for this interface, if it exists.
86 return (EADDRNOTAVAIL);
87 for (ia = ns_ifaddr; ia; ia = ia->ia_next)
88 if (ia->ia_ifp == ifp)
94 if (ia == (struct ns_ifaddr *)0)
95 return (EADDRNOTAVAIL);
96 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
101 if (ia == (struct ns_ifaddr *)0)
102 return (EADDRNOTAVAIL);
103 if ((ifp->if_flags & IFF_BROADCAST) == 0)
105 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
109 if (ia == (struct ns_ifaddr *)0)
110 return (EADDRNOTAVAIL);
111 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
113 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
117 #ifdef NS_PRIV_SOCKETS
118 if ((so->so_state & SS_PRIV) == 0)
125 if (ifra->ifra_addr.sns_family == AF_NS)
126 for (oia = ia; ia; ia = ia->ia_next) {
127 if (ia->ia_ifp == ifp &&
128 ns_neteq(ia->ia_addr.sns_addr,
129 ifra->ifra_addr.sns_addr))
132 if (cmd == SIOCDIFADDR && ia == 0)
133 return (EADDRNOTAVAIL);
138 if (ia == (struct ns_ifaddr *)0) {
139 oia = (struct ns_ifaddr *)
140 malloc(sizeof *ia, M_IFADDR, M_WAITOK);
141 if (oia == (struct ns_ifaddr *)NULL)
143 bzero((caddr_t)oia, sizeof(*oia));
144 if ((ia = ns_ifaddr) != NULL) {
145 for ( ; ia->ia_next; ia = ia->ia_next)
152 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
154 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
156 ia->ia_ifa.ifa_netmask =
157 (struct sockaddr *)&ns_netmask;
159 ia->ia_ifa.ifa_dstaddr =
160 (struct sockaddr *)&ia->ia_dstaddr;
161 if (ifp->if_flags & IFF_BROADCAST) {
162 ia->ia_broadaddr.sns_family = AF_NS;
163 ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
164 ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
172 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
174 if (ia->ia_flags & IFA_ROUTE) {
175 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
176 ia->ia_flags &= ~IFA_ROUTE;
179 error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
181 (struct ucred *)NULL);
185 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
189 return (ns_ifinit(ifp, (struct ns_ifaddr *)ia,
190 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
193 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
194 /* XXX not on list */
196 TAILQ_REMOVE(&ifp->if_addrhead, (struct ifaddr *)ia, ifa_link);
197 if (oia == (ia = ns_ifaddr)) {
198 ns_ifaddr = ia->ia_next;
200 while (ia->ia_next && (ia->ia_next != oia)) {
204 ia->ia_next = oia->ia_next;
206 printf("Didn't unlink nsifadr from list\n");
208 IFAFREE((&oia->ia_ifa));
209 if (0 == --ns_interfaces) {
211 * We reset to virginity and start all over again
213 ns_thishost = ns_zerohost;
218 dstIsNew = 0; hostIsNew = 1;
219 if (ia->ia_addr.sns_family == AF_NS) {
220 if (ifra->ifra_addr.sns_len == 0) {
221 ifra->ifra_addr = ia->ia_addr;
223 } else if (ns_neteq(ifra->ifra_addr.sns_addr,
224 ia->ia_addr.sns_addr))
227 if ((ifp->if_flags & IFF_POINTOPOINT) &&
228 (ifra->ifra_dstaddr.sns_family == AF_NS)) {
230 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
231 ia->ia_dstaddr = ifra->ifra_dstaddr;
234 if (ifra->ifra_addr.sns_family == AF_NS &&
235 (hostIsNew || dstIsNew))
236 error = ns_ifinit(ifp, (struct ns_ifaddr *)ia,
237 &ifra->ifra_addr, 0);
241 if (ifp->if_ioctl == 0)
243 return ((*ifp->if_ioctl)(ifp, cmd, data, (struct ucred *)NULL));
248 * Delete any previous route for an old address.
253 struct ns_ifaddr *ia;
255 if (ia->ia_flags & IFA_ROUTE) {
256 if (ifp->if_flags & IFF_POINTOPOINT) {
257 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
259 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
260 ia->ia_flags &= ~IFA_ROUTE;
264 * Initialize an interface's internet address
265 * and routing table entry.
268 ns_ifinit(ifp, ia, sns, scrub)
270 struct ns_ifaddr *ia;
271 struct sockaddr_ns *sns;
274 struct sockaddr_ns oldaddr;
275 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,
299 (struct ucred *)NULL))) {
300 ia->ia_addr = oldaddr;
305 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
306 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
309 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
311 (struct ucred *)NULL))) {
312 ia->ia_addr = oldaddr;
316 if (!ns_hosteqnh(ns_thishost,*h)) {
317 ia->ia_addr = oldaddr;
322 ia->ia_addr = oldaddr;
326 ia->ia_ifa.ifa_metric = ifp->if_metric;
328 * Add route for the network.
331 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
333 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
335 if (ifp->if_flags & IFF_POINTOPOINT)
336 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
338 ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
339 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
341 ia->ia_flags |= IFA_ROUTE;
346 * Return address info for specified internet network.
352 struct ns_ifaddr *ia;
353 struct ns_addr *compare;
355 struct ns_ifaddr *ia_maybe = 0;
356 union ns_net net = dst->x_net;
358 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
359 if ((ifp = ia->ia_ifp) != NULL) {
360 if (ifp->if_flags & IFF_POINTOPOINT) {
361 compare = &satons_addr(ia->ia_dstaddr);
362 if (ns_hosteq(*dst, *compare))
364 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
367 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))