tcp_syncache.cache_limit is a per-cpu limit, reserve enough space for all
[dragonfly.git] / sys / netproto / ns / ns.c
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1/*
2 * Copyright (c) 1984, 1985, 1986, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 *
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 $
636ae7e8 35 * $DragonFly: src/sys/netproto/ns/ns.c,v 1.10 2005/06/10 22:44:01 dillon Exp $
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36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
7b51e07b 40#include <sys/malloc.h>
984263bc 41#include <sys/mbuf.h>
f7c07ac9 42#include <sys/sockio.h>
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43#include <sys/protosw.h>
44#include <sys/errno.h>
45#include <sys/socket.h>
46#include <sys/socketvar.h>
636ae7e8 47#include <sys/thread2.h>
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48
49#include <net/if.h>
50#include <net/route.h>
51
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52#include "ns.h"
53#include "ns_if.h"
984263bc 54
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55#include "opt_ns.h"
56
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57#ifdef NS
58
59struct ns_ifaddr *ns_ifaddr;
60int ns_interfaces;
57106eda 61
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62extern struct sockaddr_ns ns_netmask, ns_hostmask;
63
64/*
65 * Generic internet control operations (ioctl's).
66 */
67/* ARGSUSED */
7b51e07b 68int
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69ns_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
70 struct thread *td)
984263bc 71{
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72 struct ifreq *ifr = (struct ifreq *)data;
73 struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
74 struct ns_ifaddr *ia;
7b51e07b 75 struct ifaddr *ifa = NULL; /* XXX used ininitialized ?*/
984263bc 76 struct ns_ifaddr *oia;
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77 int dstIsNew, hostIsNew;
78 int error = 0; /* initalize because of scoping */
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79
80 /*
81 * Find address for this interface, if it exists.
82 */
83 if (ifp == 0)
84 return (EADDRNOTAVAIL);
85 for (ia = ns_ifaddr; ia; ia = ia->ia_next)
86 if (ia->ia_ifp == ifp)
87 break;
88
89 switch (cmd) {
90
91 case SIOCGIFADDR:
92 if (ia == (struct ns_ifaddr *)0)
93 return (EADDRNOTAVAIL);
94 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
95 return (0);
96
97
98 case SIOCGIFBRDADDR:
99 if (ia == (struct ns_ifaddr *)0)
100 return (EADDRNOTAVAIL);
101 if ((ifp->if_flags & IFF_BROADCAST) == 0)
102 return (EINVAL);
103 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
104 return (0);
105
106 case SIOCGIFDSTADDR:
107 if (ia == (struct ns_ifaddr *)0)
108 return (EADDRNOTAVAIL);
109 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
110 return (EINVAL);
111 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
112 return (0);
113 }
114
7b51e07b 115#ifdef NS_PRIV_SOCKETS
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116 if ((so->so_state & SS_PRIV) == 0)
117 return (EPERM);
7b51e07b 118#endif
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119
120 switch (cmd) {
121 case SIOCAIFADDR:
122 case SIOCDIFADDR:
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))
128 break;
129 }
130 if (cmd == SIOCDIFADDR && ia == 0)
131 return (EADDRNOTAVAIL);
132 /* FALLTHROUGH */
133
134 case SIOCSIFADDR:
135 case SIOCSIFDSTADDR:
136 if (ia == (struct ns_ifaddr *)0) {
137 oia = (struct ns_ifaddr *)
138 malloc(sizeof *ia, M_IFADDR, M_WAITOK);
139 if (oia == (struct ns_ifaddr *)NULL)
140 return (ENOBUFS);
141 bzero((caddr_t)oia, sizeof(*oia));
7b51e07b 142 if ((ia = ns_ifaddr) != NULL) {
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143 for ( ; ia->ia_next; ia = ia->ia_next)
144 ;
145 ia->ia_next = oia;
146 } else
147 ns_ifaddr = oia;
148 ia = oia;
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149
150 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
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151 ia->ia_ifp = ifp;
152 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
153
154 ia->ia_ifa.ifa_netmask =
155 (struct sockaddr *)&ns_netmask;
156
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;
163 }
164 ns_interfaces++;
165 }
166 }
167
168 switch (cmd) {
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169 case SIOCSIFDSTADDR:
170 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
171 return (EINVAL);
172 if (ia->ia_flags & IFA_ROUTE) {
173 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
174 ia->ia_flags &= ~IFA_ROUTE;
175 }
176 if (ifp->if_ioctl) {
7b51e07b 177 error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
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178 (caddr_t)ia,
179 (struct ucred *)NULL);
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180 if (error)
181 return (error);
182 }
183 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
184 return (0);
185
186 case SIOCSIFADDR:
7b51e07b 187 return (ns_ifinit(ifp, (struct ns_ifaddr *)ia,
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188 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
189
190 case SIOCDIFADDR:
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191 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
192 /* XXX not on list */
984263bc 193 oia = ia;
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194 TAILQ_REMOVE(&ifp->if_addrhead, (struct ifaddr *)ia, ifa_link);
195 if (oia == (ia = ns_ifaddr)) {
196 ns_ifaddr = ia->ia_next;
197 } else {
198 while (ia->ia_next && (ia->ia_next != oia)) {
199 ia = ia->ia_next;
200 }
201 if (ia->ia_next)
202 ia->ia_next = oia->ia_next;
203 else
204 printf("Didn't unlink nsifadr from list\n");
205 }
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206 IFAFREE((&oia->ia_ifa));
207 if (0 == --ns_interfaces) {
208 /*
209 * We reset to virginity and start all over again
210 */
211 ns_thishost = ns_zerohost;
212 }
213 return (0);
214
215 case SIOCAIFADDR:
216 dstIsNew = 0; hostIsNew = 1;
217 if (ia->ia_addr.sns_family == AF_NS) {
218 if (ifra->ifra_addr.sns_len == 0) {
219 ifra->ifra_addr = ia->ia_addr;
220 hostIsNew = 0;
221 } else if (ns_neteq(ifra->ifra_addr.sns_addr,
222 ia->ia_addr.sns_addr))
223 hostIsNew = 0;
224 }
225 if ((ifp->if_flags & IFF_POINTOPOINT) &&
226 (ifra->ifra_dstaddr.sns_family == AF_NS)) {
227 if (hostIsNew == 0)
7b51e07b 228 ns_ifscrub(ifp, (struct ns_ifaddr *)ia);
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229 ia->ia_dstaddr = ifra->ifra_dstaddr;
230 dstIsNew = 1;
231 }
232 if (ifra->ifra_addr.sns_family == AF_NS &&
233 (hostIsNew || dstIsNew))
f7c07ac9 234 error = ns_ifinit(ifp, (struct ns_ifaddr *)ia,
7b51e07b 235 &ifra->ifra_addr, 0);
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236 return (error);
237
238 default:
239 if (ifp->if_ioctl == 0)
240 return (EOPNOTSUPP);
bd4539cc 241 return ((*ifp->if_ioctl)(ifp, cmd, data, (struct ucred *)NULL));
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242 }
243}
244
245/*
246* Delete any previous route for an old address.
247*/
7b51e07b 248void
984263bc 249ns_ifscrub(ifp, ia)
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250 struct ifnet *ifp;
251 struct ns_ifaddr *ia;
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252{
253 if (ia->ia_flags & IFA_ROUTE) {
254 if (ifp->if_flags & IFF_POINTOPOINT) {
255 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
256 } else
257 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
258 ia->ia_flags &= ~IFA_ROUTE;
259 }
260}
261/*
262 * Initialize an interface's internet address
263 * and routing table entry.
264 */
7b51e07b 265int
984263bc 266ns_ifinit(ifp, ia, sns, scrub)
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267 struct ifnet *ifp;
268 struct ns_ifaddr *ia;
269 struct sockaddr_ns *sns;
7b51e07b 270 int scrub;
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271{
272 struct sockaddr_ns oldaddr;
34ee9825 273 union ns_host *h = &ia->ia_addr.sns_addr.x_host;
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274 int error;
275
276 crit_enter();
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277
278 /*
279 * Set up new addresses.
280 */
281 oldaddr = ia->ia_addr;
282 ia->ia_addr = *sns;
283 /*
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
289 * used.
290 *
291 * Give the interface a chance to initialize
292 * if this is its first address,
293 * and to validate the address if necessary.
294 */
295 if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
296 if (ifp->if_ioctl &&
7b51e07b 297 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
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298 (caddr_t)ia,
299 (struct ucred *)NULL))) {
984263bc 300 ia->ia_addr = oldaddr;
636ae7e8 301 crit_exit();
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302 return (error);
303 }
304 ns_thishost = *h;
305 } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
306 || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
307 *h = ns_thishost;
308 if (ifp->if_ioctl &&
7b51e07b 309 (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
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310 (caddr_t)ia,
311 (struct ucred *)NULL))) {
984263bc 312 ia->ia_addr = oldaddr;
636ae7e8 313 crit_exit();
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314 return (error);
315 }
316 if (!ns_hosteqnh(ns_thishost,*h)) {
317 ia->ia_addr = oldaddr;
636ae7e8 318 crit_exit();
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319 return (EINVAL);
320 }
321 } else {
322 ia->ia_addr = oldaddr;
636ae7e8 323 crit_exit();
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324 return (EINVAL);
325 }
326 ia->ia_ifa.ifa_metric = ifp->if_metric;
327 /*
328 * Add route for the network.
329 */
330 if (scrub) {
331 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
332 ns_ifscrub(ifp, ia);
333 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
334 }
335 if (ifp->if_flags & IFF_POINTOPOINT)
336 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
337 else {
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);
340 }
341 ia->ia_flags |= IFA_ROUTE;
342 return (0);
343}
344
345/*
346 * Return address info for specified internet network.
347 */
348struct ns_ifaddr *
349ns_iaonnetof(dst)
34ee9825 350 struct ns_addr *dst;
984263bc 351{
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352 struct ns_ifaddr *ia;
353 struct ns_addr *compare;
354 struct ifnet *ifp;
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355 struct ns_ifaddr *ia_maybe = 0;
356 union ns_net net = dst->x_net;
357
358 for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
7b51e07b 359 if ((ifp = ia->ia_ifp) != NULL) {
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360 if (ifp->if_flags & IFF_POINTOPOINT) {
361 compare = &satons_addr(ia->ia_dstaddr);
362 if (ns_hosteq(*dst, *compare))
363 return (ia);
364 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
365 ia_maybe = ia;
366 } else {
367 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
368 return (ia);
369 }
370 }
371 }
372 return (ia_maybe);
373}
374#endif