udp6_usrreq.c revision 1.49 1 1.49 itojun /* $NetBSD: udp6_usrreq.c,v 1.49 2001/10/24 06:36:39 itojun Exp $ */
2 1.43 itojun /* $KAME: udp6_usrreq.c,v 1.86 2001/05/27 17:33:00 itojun Exp $ */
3 1.3 thorpej
4 1.2 itojun /*
5 1.2 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 1.2 itojun * All rights reserved.
7 1.27 itojun *
8 1.2 itojun * Redistribution and use in source and binary forms, with or without
9 1.2 itojun * modification, are permitted provided that the following conditions
10 1.2 itojun * are met:
11 1.2 itojun * 1. Redistributions of source code must retain the above copyright
12 1.2 itojun * notice, this list of conditions and the following disclaimer.
13 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright
14 1.2 itojun * notice, this list of conditions and the following disclaimer in the
15 1.2 itojun * documentation and/or other materials provided with the distribution.
16 1.2 itojun * 3. Neither the name of the project nor the names of its contributors
17 1.2 itojun * may be used to endorse or promote products derived from this software
18 1.2 itojun * without specific prior written permission.
19 1.27 itojun *
20 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 1.2 itojun * SUCH DAMAGE.
31 1.2 itojun */
32 1.2 itojun
33 1.2 itojun /*
34 1.2 itojun * Copyright (c) 1982, 1986, 1989, 1993
35 1.2 itojun * The Regents of the University of California. All rights reserved.
36 1.2 itojun *
37 1.2 itojun * Redistribution and use in source and binary forms, with or without
38 1.2 itojun * modification, are permitted provided that the following conditions
39 1.2 itojun * are met:
40 1.2 itojun * 1. Redistributions of source code must retain the above copyright
41 1.2 itojun * notice, this list of conditions and the following disclaimer.
42 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright
43 1.2 itojun * notice, this list of conditions and the following disclaimer in the
44 1.2 itojun * documentation and/or other materials provided with the distribution.
45 1.2 itojun * 3. All advertising materials mentioning features or use of this software
46 1.2 itojun * must display the following acknowledgement:
47 1.2 itojun * This product includes software developed by the University of
48 1.2 itojun * California, Berkeley and its contributors.
49 1.2 itojun * 4. Neither the name of the University nor the names of its contributors
50 1.2 itojun * may be used to endorse or promote products derived from this software
51 1.2 itojun * without specific prior written permission.
52 1.2 itojun *
53 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 1.2 itojun * SUCH DAMAGE.
64 1.2 itojun *
65 1.2 itojun * @(#)udp_var.h 8.1 (Berkeley) 6/10/93
66 1.2 itojun */
67 1.5 thorpej
68 1.5 thorpej #include "opt_ipsec.h"
69 1.2 itojun
70 1.2 itojun #include <sys/param.h>
71 1.2 itojun #include <sys/malloc.h>
72 1.2 itojun #include <sys/mbuf.h>
73 1.2 itojun #include <sys/protosw.h>
74 1.2 itojun #include <sys/socket.h>
75 1.2 itojun #include <sys/socketvar.h>
76 1.2 itojun #include <sys/errno.h>
77 1.2 itojun #include <sys/stat.h>
78 1.2 itojun #include <sys/systm.h>
79 1.2 itojun #include <sys/proc.h>
80 1.8 itojun #include <sys/syslog.h>
81 1.2 itojun
82 1.2 itojun #include <net/if.h>
83 1.2 itojun #include <net/route.h>
84 1.2 itojun #include <net/if_types.h>
85 1.2 itojun
86 1.2 itojun #include <netinet/in.h>
87 1.2 itojun #include <netinet/in_var.h>
88 1.14 itojun #include <netinet/in_systm.h>
89 1.14 itojun #include <netinet/ip.h>
90 1.14 itojun #include <netinet/ip_var.h>
91 1.14 itojun #include <netinet/in_pcb.h>
92 1.14 itojun #include <netinet/udp.h>
93 1.14 itojun #include <netinet/udp_var.h>
94 1.23 itojun #include <netinet/ip6.h>
95 1.27 itojun #include <netinet6/ip6_var.h>
96 1.2 itojun #include <netinet6/in6_pcb.h>
97 1.23 itojun #include <netinet/icmp6.h>
98 1.2 itojun #include <netinet6/udp6_var.h>
99 1.14 itojun #include <netinet6/ip6protosw.h>
100 1.2 itojun
101 1.2 itojun #ifdef IPSEC
102 1.2 itojun #include <netinet6/ipsec.h>
103 1.49 itojun #endif /* IPSEC */
104 1.2 itojun
105 1.2 itojun #include "faith.h"
106 1.41 itojun #if defined(NFAITH) && NFAITH > 0
107 1.41 itojun #include <net/if_faith.h>
108 1.41 itojun #endif
109 1.2 itojun
110 1.2 itojun /*
111 1.2 itojun * UDP protocol inplementation.
112 1.2 itojun * Per RFC 768, August, 1980.
113 1.2 itojun */
114 1.2 itojun
115 1.2 itojun struct in6pcb *udp6_last_in6pcb = &udb6;
116 1.2 itojun
117 1.2 itojun static void udp6_detach __P((struct in6pcb *));
118 1.2 itojun static void udp6_notify __P((struct in6pcb *, int));
119 1.2 itojun
120 1.2 itojun void
121 1.2 itojun udp6_init()
122 1.2 itojun {
123 1.2 itojun udb6.in6p_next = udb6.in6p_prev = &udb6;
124 1.2 itojun }
125 1.2 itojun
126 1.2 itojun /*
127 1.2 itojun * Notify a udp user of an asynchronous error;
128 1.27 itojun * just wake up so that he can collect error status.
129 1.2 itojun */
130 1.2 itojun static void
131 1.2 itojun udp6_notify(in6p, errno)
132 1.39 itojun struct in6pcb *in6p;
133 1.2 itojun int errno;
134 1.2 itojun {
135 1.2 itojun in6p->in6p_socket->so_error = errno;
136 1.2 itojun sorwakeup(in6p->in6p_socket);
137 1.2 itojun sowwakeup(in6p->in6p_socket);
138 1.2 itojun }
139 1.2 itojun
140 1.2 itojun void
141 1.14 itojun udp6_ctlinput(cmd, sa, d)
142 1.2 itojun int cmd;
143 1.2 itojun struct sockaddr *sa;
144 1.14 itojun void *d;
145 1.2 itojun {
146 1.2 itojun struct udphdr uh;
147 1.39 itojun struct ip6_hdr *ip6;
148 1.40 itojun struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
149 1.14 itojun struct mbuf *m;
150 1.14 itojun int off;
151 1.40 itojun void *cmdarg;
152 1.40 itojun struct ip6ctlparam *ip6cp = NULL;
153 1.40 itojun const struct sockaddr_in6 *sa6_src = NULL;
154 1.25 itojun void (*notify) __P((struct in6pcb *, int)) = udp6_notify;
155 1.40 itojun struct udp_portonly {
156 1.40 itojun u_int16_t uh_sport;
157 1.40 itojun u_int16_t uh_dport;
158 1.40 itojun } *uhp;
159 1.2 itojun
160 1.10 itojun if (sa->sa_family != AF_INET6 ||
161 1.10 itojun sa->sa_len != sizeof(struct sockaddr_in6))
162 1.10 itojun return;
163 1.14 itojun
164 1.25 itojun if ((unsigned)cmd >= PRC_NCMDS)
165 1.25 itojun return;
166 1.25 itojun if (PRC_IS_REDIRECT(cmd))
167 1.25 itojun notify = in6_rtchange, d = NULL;
168 1.25 itojun else if (cmd == PRC_HOSTDEAD)
169 1.25 itojun d = NULL;
170 1.47 itojun else if (cmd == PRC_MSGSIZE) {
171 1.47 itojun /* special code is present, see below */
172 1.47 itojun notify = in6_rtchange;
173 1.47 itojun }
174 1.25 itojun else if (inet6ctlerrmap[cmd] == 0)
175 1.2 itojun return;
176 1.7 itojun
177 1.14 itojun /* if the parameter is from icmp6, decode it. */
178 1.14 itojun if (d != NULL) {
179 1.40 itojun ip6cp = (struct ip6ctlparam *)d;
180 1.14 itojun m = ip6cp->ip6c_m;
181 1.14 itojun ip6 = ip6cp->ip6c_ip6;
182 1.14 itojun off = ip6cp->ip6c_off;
183 1.40 itojun cmdarg = ip6cp->ip6c_cmdarg;
184 1.40 itojun sa6_src = ip6cp->ip6c_src;
185 1.14 itojun } else {
186 1.14 itojun m = NULL;
187 1.14 itojun ip6 = NULL;
188 1.40 itojun cmdarg = NULL;
189 1.40 itojun sa6_src = &sa6_any;
190 1.14 itojun }
191 1.14 itojun
192 1.2 itojun if (ip6) {
193 1.2 itojun /*
194 1.2 itojun * XXX: We assume that when IPV6 is non NULL,
195 1.2 itojun * M and OFF are valid.
196 1.2 itojun */
197 1.33 itojun
198 1.33 itojun /* check if we can safely examine src and dst ports */
199 1.42 itojun if (m->m_pkthdr.len < off + sizeof(*uhp)) {
200 1.42 itojun if (cmd == PRC_MSGSIZE)
201 1.42 itojun icmp6_mtudisc_update((struct ip6ctlparam *)d, 0);
202 1.33 itojun return;
203 1.42 itojun }
204 1.7 itojun
205 1.40 itojun bzero(&uh, sizeof(uh));
206 1.40 itojun m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
207 1.34 itojun
208 1.34 itojun if (cmd == PRC_MSGSIZE) {
209 1.36 itojun int valid = 0;
210 1.40 itojun
211 1.34 itojun /*
212 1.34 itojun * Check to see if we have a valid UDP socket
213 1.34 itojun * corresponding to the address in the ICMPv6 message
214 1.34 itojun * payload.
215 1.34 itojun */
216 1.40 itojun if (in6_pcblookup_connect(&udb6, &sa6->sin6_addr,
217 1.40 itojun uh.uh_dport, (struct in6_addr *)&sa6_src->sin6_addr,
218 1.40 itojun uh.uh_sport, 0))
219 1.36 itojun valid++;
220 1.34 itojun #if 0
221 1.34 itojun /*
222 1.34 itojun * As the use of sendto(2) is fairly popular,
223 1.34 itojun * we may want to allow non-connected pcb too.
224 1.34 itojun * But it could be too weak against attacks...
225 1.34 itojun * We should at least check if the local address (= s)
226 1.34 itojun * is really ours.
227 1.34 itojun */
228 1.40 itojun else if (in6_pcblookup_bind(&udb6, &sa6->sin6_addr,
229 1.40 itojun uh.uh_dport, 0))
230 1.36 itojun valid++;
231 1.34 itojun #endif
232 1.34 itojun
233 1.34 itojun /*
234 1.40 itojun * Depending on the value of "valid" and routing table
235 1.40 itojun * size (mtudisc_{hi,lo}wat), we will:
236 1.46 itojun * - recalculate the new MTU and create the
237 1.40 itojun * corresponding routing entry, or
238 1.40 itojun * - ignore the MTU change notification.
239 1.34 itojun */
240 1.36 itojun icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
241 1.34 itojun
242 1.40 itojun /*
243 1.40 itojun * regardless of if we called icmp6_mtudisc_update(),
244 1.40 itojun * we need to call in6_pcbnotify(), to notify path
245 1.40 itojun * MTU change to the userland (2292bis-02), because
246 1.40 itojun * some unconnected sockets may share the same
247 1.40 itojun * destination and want to know the path MTU.
248 1.40 itojun */
249 1.34 itojun }
250 1.34 itojun
251 1.40 itojun (void) in6_pcbnotify(&udb6, sa, uh.uh_dport,
252 1.40 itojun (struct sockaddr *)sa6_src, uh.uh_sport, cmd, cmdarg,
253 1.40 itojun notify);
254 1.2 itojun } else {
255 1.40 itojun (void) in6_pcbnotify(&udb6, sa, 0, (struct sockaddr *)sa6_src,
256 1.40 itojun 0, cmd, cmdarg, notify);
257 1.2 itojun }
258 1.2 itojun }
259 1.2 itojun
260 1.2 itojun extern int udp6_sendspace;
261 1.2 itojun extern int udp6_recvspace;
262 1.2 itojun
263 1.2 itojun int
264 1.2 itojun udp6_usrreq(so, req, m, addr6, control, p)
265 1.2 itojun struct socket *so;
266 1.2 itojun int req;
267 1.2 itojun struct mbuf *m, *addr6, *control;
268 1.2 itojun struct proc *p;
269 1.2 itojun {
270 1.2 itojun struct in6pcb *in6p = sotoin6pcb(so);
271 1.2 itojun int error = 0;
272 1.2 itojun int s;
273 1.2 itojun
274 1.27 itojun /*
275 1.2 itojun * MAPPED_ADDR implementation info:
276 1.2 itojun * Mapped addr support for PRU_CONTROL is not necessary.
277 1.2 itojun * Because typical user of PRU_CONTROL is such as ifconfig,
278 1.2 itojun * and they don't associate any addr to their socket. Then
279 1.2 itojun * socket family is only hint about the PRU_CONTROL'ed address
280 1.2 itojun * family, especially when getting addrs from kernel.
281 1.2 itojun * So AF_INET socket need to be used to control AF_INET addrs,
282 1.2 itojun * and AF_INET6 socket for AF_INET6 addrs.
283 1.2 itojun */
284 1.2 itojun if (req == PRU_CONTROL)
285 1.2 itojun return(in6_control(so, (u_long)m, (caddr_t)addr6,
286 1.2 itojun (struct ifnet *)control, p));
287 1.20 thorpej
288 1.21 thorpej if (req == PRU_PURGEIF) {
289 1.44 itojun in6_pcbpurgeif0(&udb6, (struct ifnet *)control);
290 1.21 thorpej in6_purgeif((struct ifnet *)control);
291 1.21 thorpej in6_pcbpurgeif(&udb6, (struct ifnet *)control);
292 1.20 thorpej return (0);
293 1.20 thorpej }
294 1.2 itojun
295 1.2 itojun if (in6p == NULL && req != PRU_ATTACH) {
296 1.2 itojun error = EINVAL;
297 1.2 itojun goto release;
298 1.2 itojun }
299 1.2 itojun
300 1.2 itojun switch (req) {
301 1.2 itojun case PRU_ATTACH:
302 1.2 itojun /*
303 1.2 itojun * MAPPED_ADDR implementation spec:
304 1.27 itojun * Always attach for IPv6,
305 1.2 itojun * and only when necessary for IPv4.
306 1.2 itojun */
307 1.2 itojun if (in6p != NULL) {
308 1.2 itojun error = EINVAL;
309 1.2 itojun break;
310 1.2 itojun }
311 1.4 itojun s = splsoftnet();
312 1.2 itojun error = in6_pcballoc(so, &udb6);
313 1.2 itojun splx(s);
314 1.2 itojun if (error)
315 1.2 itojun break;
316 1.2 itojun error = soreserve(so, udp6_sendspace, udp6_recvspace);
317 1.2 itojun if (error)
318 1.2 itojun break;
319 1.2 itojun in6p = sotoin6pcb(so);
320 1.2 itojun in6p->in6p_cksum = -1; /* just to be sure */
321 1.2 itojun break;
322 1.2 itojun
323 1.2 itojun case PRU_DETACH:
324 1.2 itojun udp6_detach(in6p);
325 1.2 itojun break;
326 1.2 itojun
327 1.2 itojun case PRU_BIND:
328 1.4 itojun s = splsoftnet();
329 1.29 itojun error = in6_pcbbind(in6p, addr6, p);
330 1.2 itojun splx(s);
331 1.2 itojun break;
332 1.2 itojun
333 1.2 itojun case PRU_LISTEN:
334 1.2 itojun error = EOPNOTSUPP;
335 1.2 itojun break;
336 1.2 itojun
337 1.2 itojun case PRU_CONNECT:
338 1.14 itojun if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
339 1.2 itojun error = EISCONN;
340 1.2 itojun break;
341 1.2 itojun }
342 1.4 itojun s = splsoftnet();
343 1.2 itojun error = in6_pcbconnect(in6p, addr6);
344 1.2 itojun if (ip6_auto_flowlabel) {
345 1.2 itojun in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
346 1.27 itojun in6p->in6p_flowinfo |=
347 1.2 itojun (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
348 1.2 itojun }
349 1.2 itojun splx(s);
350 1.2 itojun if (error == 0)
351 1.2 itojun soisconnected(so);
352 1.2 itojun break;
353 1.2 itojun
354 1.2 itojun case PRU_CONNECT2:
355 1.2 itojun error = EOPNOTSUPP;
356 1.2 itojun break;
357 1.2 itojun
358 1.2 itojun case PRU_ACCEPT:
359 1.2 itojun error = EOPNOTSUPP;
360 1.2 itojun break;
361 1.2 itojun
362 1.2 itojun case PRU_DISCONNECT:
363 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
364 1.2 itojun error = ENOTCONN;
365 1.2 itojun break;
366 1.2 itojun }
367 1.4 itojun s = splsoftnet();
368 1.2 itojun in6_pcbdisconnect(in6p);
369 1.2 itojun bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr));
370 1.2 itojun splx(s);
371 1.2 itojun so->so_state &= ~SS_ISCONNECTED; /* XXX */
372 1.2 itojun break;
373 1.2 itojun
374 1.2 itojun case PRU_SHUTDOWN:
375 1.2 itojun socantsendmore(so);
376 1.2 itojun break;
377 1.2 itojun
378 1.2 itojun case PRU_SEND:
379 1.29 itojun return(udp6_output(in6p, m, addr6, control, p));
380 1.2 itojun
381 1.2 itojun case PRU_ABORT:
382 1.2 itojun soisdisconnected(so);
383 1.2 itojun udp6_detach(in6p);
384 1.2 itojun break;
385 1.2 itojun
386 1.2 itojun case PRU_SOCKADDR:
387 1.2 itojun in6_setsockaddr(in6p, addr6);
388 1.2 itojun break;
389 1.2 itojun
390 1.2 itojun case PRU_PEERADDR:
391 1.2 itojun in6_setpeeraddr(in6p, addr6);
392 1.2 itojun break;
393 1.2 itojun
394 1.2 itojun case PRU_SENSE:
395 1.2 itojun /*
396 1.2 itojun * stat: don't bother with a blocksize
397 1.2 itojun */
398 1.2 itojun return(0);
399 1.2 itojun
400 1.2 itojun case PRU_SENDOOB:
401 1.2 itojun case PRU_FASTTIMO:
402 1.2 itojun case PRU_SLOWTIMO:
403 1.2 itojun case PRU_PROTORCV:
404 1.2 itojun case PRU_PROTOSEND:
405 1.2 itojun error = EOPNOTSUPP;
406 1.2 itojun break;
407 1.2 itojun
408 1.2 itojun case PRU_RCVD:
409 1.2 itojun case PRU_RCVOOB:
410 1.2 itojun return(EOPNOTSUPP); /* do not free mbuf's */
411 1.2 itojun
412 1.2 itojun default:
413 1.2 itojun panic("udp6_usrreq");
414 1.2 itojun }
415 1.2 itojun
416 1.2 itojun release:
417 1.43 itojun if (control)
418 1.2 itojun m_freem(control);
419 1.2 itojun if (m)
420 1.2 itojun m_freem(m);
421 1.2 itojun return(error);
422 1.2 itojun }
423 1.2 itojun
424 1.2 itojun static void
425 1.2 itojun udp6_detach(in6p)
426 1.2 itojun struct in6pcb *in6p;
427 1.2 itojun {
428 1.27 itojun int s = splsoftnet();
429 1.2 itojun
430 1.2 itojun if (in6p == udp6_last_in6pcb)
431 1.2 itojun udp6_last_in6pcb = &udb6;
432 1.2 itojun in6_pcbdetach(in6p);
433 1.2 itojun splx(s);
434 1.2 itojun }
435 1.2 itojun
436 1.31 mrg #include <uvm/uvm_extern.h>
437 1.2 itojun #include <sys/sysctl.h>
438 1.2 itojun
439 1.2 itojun int
440 1.2 itojun udp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
441 1.2 itojun int *name;
442 1.2 itojun u_int namelen;
443 1.2 itojun void *oldp;
444 1.2 itojun size_t *oldlenp;
445 1.2 itojun void *newp;
446 1.2 itojun size_t newlen;
447 1.2 itojun {
448 1.2 itojun /* All sysctl names at this level are terminal. */
449 1.2 itojun if (namelen != 1)
450 1.2 itojun return ENOTDIR;
451 1.2 itojun
452 1.2 itojun switch (name[0]) {
453 1.2 itojun
454 1.28 itojun case UDP6CTL_SENDSPACE:
455 1.2 itojun return sysctl_int(oldp, oldlenp, newp, newlen,
456 1.2 itojun &udp6_sendspace);
457 1.2 itojun case UDP6CTL_RECVSPACE:
458 1.27 itojun return sysctl_int(oldp, oldlenp, newp, newlen,
459 1.2 itojun &udp6_recvspace);
460 1.2 itojun default:
461 1.2 itojun return ENOPROTOOPT;
462 1.2 itojun }
463 1.2 itojun /* NOTREACHED */
464 1.2 itojun }
465