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
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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.
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)
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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 1.13 2006/09/05 00:55:49 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>
47 #include <sys/thread2.h>
50 #include <net/route.h>
59 struct ns_ifaddr *ns_ifaddr;
62 extern struct sockaddr_ns ns_netmask, ns_hostmask;
65 * Generic internet control operations (ioctl's).
69 ns_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
72 struct ifreq *ifr = (struct ifreq *)data;
73 struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
75 struct ifaddr *ifa = NULL; /* XXX used ininitialized ?*/
76 struct ns_ifaddr *oia;
77 int dstIsNew, hostIsNew;
78 int error = 0; /* initalize because of scoping */
81 * Find address for this interface, if it exists.
84 return (EADDRNOTAVAIL);
85 for (ia = ns_ifaddr; ia; ia = ia->ia_next)
86 if (ia->ia_ifp == ifp)
92 if (ia == (struct ns_ifaddr *)0)
93 return (EADDRNOTAVAIL);
94 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
99 if (ia == (struct ns_ifaddr *)0)
100 return (EADDRNOTAVAIL);
101 if ((ifp->if_flags & IFF_BROADCAST) == 0)
103 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
107 if (ia == (struct ns_ifaddr *)0)
108 return (EADDRNOTAVAIL);
109 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
111 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
115 #ifdef NS_PRIV_SOCKETS
116 if ((so->so_state & SS_PRIV) == 0)
123 if (ifra->ifra_addr.sns_family == AF_NS)
124 for (oia = ia; ia; ia = ia->ia_next) {
125 if (ia->ia_ifp == ifp &&
126 ns_neteq(ia->ia_addr.sns_addr,
127 ifra->ifra_addr.sns_addr))
130 if (cmd == SIOCDIFADDR && ia == 0)
131 return (EADDRNOTAVAIL);
136 if (ia == (struct ns_ifaddr *)0) {
137 oia = (struct ns_ifaddr *)
138 kmalloc(sizeof *ia, M_IFADDR, M_WAITOK);
139 if (oia == (struct ns_ifaddr *)NULL)
141 bzero((caddr_t)oia, sizeof(*oia));
142 if ((ia = ns_ifaddr) != NULL) {
143 for ( ; ia->ia_next; ia = ia->ia_next)
150 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
152 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
154 ia->ia_ifa.ifa_netmask =
155 (struct sockaddr *)&ns_netmask;
157 ia->ia_ifa.ifa_dstaddr =
158 (struct sockaddr *)&ia->ia_dstaddr;
159 if (ifp->if_flags & IFF_BROADCAST) {
160 ia->ia_broadaddr.sns_family = AF_NS;
161 ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
162 ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
170 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
172 if (ia->ia_flags & IFA_ROUTE) {
173 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
174 ia->ia_flags &= ~IFA_ROUTE;
177 lwkt_serialize_enter(ifp->if_serializer);
178 error = ifp->if_ioctl(ifp, SIOCSIFDSTADDR,
180 (struct ucred *)NULL);
181 lwkt_serialize_exit(ifp->if_serializer);
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 lwkt_serialize_enter(ifp->if_serializer);
244 error = ifp->if_ioctl(ifp, cmd, data, (struct ucred *)NULL);
245 lwkt_serialize_exit(ifp->if_serializer);
251 * Delete any previous route for an old address.
254 ns_ifscrub(struct ifnet *ifp, struct ns_ifaddr *ia)
256 if (ia->ia_flags & IFA_ROUTE) {
257 if (ifp->if_flags & IFF_POINTOPOINT) {
258 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
260 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
261 ia->ia_flags &= ~IFA_ROUTE;
265 * Initialize an interface's internet address
266 * and routing table entry.
269 ns_ifinit(struct ifnet *ifp, struct ns_ifaddr *ia, struct sockaddr_ns *sns, int scrub)
271 struct sockaddr_ns oldaddr;
272 union ns_host *h = &ia->ia_addr.sns_addr.x_host;
278 * Set up new addresses.
280 oldaddr = ia->ia_addr;
283 * The convention we shall adopt for naming is that
284 * a supplied address of zero means that "we don't care".
285 * if there is a single interface, use the address of that
286 * interface as our 6 byte host address.
287 * if there are multiple interfaces, use any address already
290 * Give the interface a chance to initialize
291 * if this is its first address,
292 * and to validate the address if necessary.
294 if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
295 lwkt_serialize_enter(ifp->if_serializer);
297 (error = ifp->if_ioctl(ifp, SIOCSIFADDR,
299 (struct ucred *)NULL))) {
300 ia->ia_addr = oldaddr;
301 lwkt_serialize_exit(ifp->if_serializer);
305 lwkt_serialize_exit(ifp->if_serializer);
307 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
308 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
310 lwkt_serialize_enter(ifp->if_serializer);
312 (error = ifp->if_ioctl(ifp, SIOCSIFADDR,
314 (struct ucred *)NULL))) {
315 ia->ia_addr = oldaddr;
316 lwkt_serialize_exit(ifp->if_serializer);
320 lwkt_serialize_exit(ifp->if_serializer);
321 if (!ns_hosteqnh(ns_thishost,*h)) {
322 ia->ia_addr = oldaddr;
327 ia->ia_addr = oldaddr;
331 ia->ia_ifa.ifa_metric = ifp->if_metric;
333 * Add route for the network.
336 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
338 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
340 if (ifp->if_flags & IFF_POINTOPOINT)
341 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
343 ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
344 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
346 ia->ia_flags |= IFA_ROUTE;
351 * Return address info for specified internet network.
354 ns_iaonnetof(struct ns_addr *dst)
356 struct ns_ifaddr *ia;
357 struct ns_addr *compare;
359 struct ns_ifaddr *ia_maybe = 0;
360 union ns_net net = dst->x_net;
362 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
363 if ((ifp = ia->ia_ifp) != NULL) {
364 if (ifp->if_flags & IFF_POINTOPOINT) {
365 compare = &satons_addr(ia->ia_dstaddr);
366 if (ns_hosteq(*dst, *compare))
368 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
371 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))