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
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9 * notice, this list of conditions and the following disclaimer.
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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
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17 * 4. Neither the name of the University nor the names of its contributors
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19 * without specific prior written permission.
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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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 1.17 2008/03/07 11:34:21 sephe 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 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)
92 return (EADDRNOTAVAIL);
93 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
99 return (EADDRNOTAVAIL);
100 if ((ifp->if_flags & IFF_BROADCAST) == 0)
102 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
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);
136 oia = ifa_create(sizeof(*ia), M_WAITOK);
137 if ((ia = ns_ifaddr) != NULL) {
138 for ( ; ia->ia_next; ia = ia->ia_next)
145 ifa_iflink(&ia->ia_ifa, ifp, 1);
147 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
149 ia->ia_ifa.ifa_netmask =
150 (struct sockaddr *)&ns_netmask;
152 ia->ia_ifa.ifa_dstaddr =
153 (struct sockaddr *)&ia->ia_dstaddr;
154 if (ifp->if_flags & IFF_BROADCAST) {
155 ia->ia_broadaddr.sns_family = AF_NS;
156 ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
157 ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
165 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
167 if (ia->ia_flags & IFA_ROUTE) {
168 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
169 ia->ia_flags &= ~IFA_ROUTE;
172 lwkt_serialize_enter(ifp->if_serializer);
173 error = ifp->if_ioctl(ifp, SIOCSIFDSTADDR,
176 lwkt_serialize_exit(ifp->if_serializer);
180 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
184 return (ns_ifinit(ifp, (struct ns_ifaddr *)ia,
185 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
188 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
189 /* XXX not on list */
191 ifa_ifunlink(&ia->ia_ifa, ifp);
192 if (oia == (ia = ns_ifaddr)) {
193 ns_ifaddr = ia->ia_next;
195 while (ia->ia_next && (ia->ia_next != oia)) {
199 ia->ia_next = oia->ia_next;
201 kprintf("Didn't unlink nsifadr from list\n");
203 ifa_destroy(&oia->ia_ifa);
204 if (0 == --ns_interfaces) {
206 * We reset to virginity and start all over again
208 ns_thishost = ns_zerohost;
213 dstIsNew = 0; hostIsNew = 1;
214 if (ia->ia_addr.sns_family == AF_NS) {
215 if (ifra->ifra_addr.sns_len == 0) {
216 ifra->ifra_addr = ia->ia_addr;
218 } else if (ns_neteq(ifra->ifra_addr.sns_addr,
219 ia->ia_addr.sns_addr))
222 if ((ifp->if_flags & IFF_POINTOPOINT) &&
223 (ifra->ifra_dstaddr.sns_family == AF_NS)) {
225 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
226 ia->ia_dstaddr = ifra->ifra_dstaddr;
229 if (ifra->ifra_addr.sns_family == AF_NS &&
230 (hostIsNew || dstIsNew))
231 error = ns_ifinit(ifp, (struct ns_ifaddr *)ia,
232 &ifra->ifra_addr, 0);
236 if (ifp->if_ioctl == 0)
238 lwkt_serialize_enter(ifp->if_serializer);
239 error = ifp->if_ioctl(ifp, cmd, data, NULL);
240 lwkt_serialize_exit(ifp->if_serializer);
246 * Delete any previous route for an old address.
249 ns_ifscrub(struct ifnet *ifp, struct ns_ifaddr *ia)
251 if (ia->ia_flags & IFA_ROUTE) {
252 if (ifp->if_flags & IFF_POINTOPOINT) {
253 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
255 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
256 ia->ia_flags &= ~IFA_ROUTE;
260 * Initialize an interface's internet address
261 * and routing table entry.
264 ns_ifinit(struct ifnet *ifp, struct ns_ifaddr *ia, struct sockaddr_ns *sns, int scrub)
266 struct sockaddr_ns oldaddr;
267 union ns_host *h = &ia->ia_addr.sns_addr.x_host;
273 * Set up new addresses.
275 oldaddr = ia->ia_addr;
278 * The convention we shall adopt for naming is that
279 * a supplied address of zero means that "we don't care".
280 * if there is a single interface, use the address of that
281 * interface as our 6 byte host address.
282 * if there are multiple interfaces, use any address already
285 * Give the interface a chance to initialize
286 * if this is its first address,
287 * and to validate the address if necessary.
289 if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
290 lwkt_serialize_enter(ifp->if_serializer);
292 (error = ifp->if_ioctl(ifp, SIOCSIFADDR,
295 ia->ia_addr = oldaddr;
296 lwkt_serialize_exit(ifp->if_serializer);
300 lwkt_serialize_exit(ifp->if_serializer);
302 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
303 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
305 lwkt_serialize_enter(ifp->if_serializer);
307 (error = ifp->if_ioctl(ifp, SIOCSIFADDR,
310 ia->ia_addr = oldaddr;
311 lwkt_serialize_exit(ifp->if_serializer);
315 lwkt_serialize_exit(ifp->if_serializer);
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.
349 ns_iaonnetof(struct ns_addr *dst)
351 struct ns_ifaddr *ia;
352 struct ns_addr *compare;
354 struct ns_ifaddr *ia_maybe = 0;
355 union ns_net net = dst->x_net;
357 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
358 if ((ifp = ia->ia_ifp) != NULL) {
359 if (ifp->if_flags & IFF_POINTOPOINT) {
360 compare = &satons_addr(ia->ia_dstaddr);
361 if (ns_hosteq(*dst, *compare))
363 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
366 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))