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source: rtems/cpukit/libnetworking/netinet/udp_usrreq.c @ dd967330

4.104.114.95

Last change on this file since dd967330 was dd967330, checked in by Ralf Corsepius <ralf.corsepius@…>, on 09/01/08 at 06:36:17
Stop using old-style function definitions.
Property mode set to `100644`
File size: 17.4 KB

Line
1	/*
2	* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
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	* 4. Neither the name of the University nor the names of its contributors
14	* may be used to endorse or promote products derived from this software
15	* without specific prior written permission.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27	* SUCH DAMAGE.
28	*
29	* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
30	* $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.170 2004/11/08 14:44:53 phk Exp $
31	*/
32
33	#include <sys/param.h>
34	#include <rtems/bsd/sys/queue.h>
35	#include <sys/systm.h>
36	#include <sys/malloc.h>
37	#include <sys/mbuf.h>
38	#include <sys/protosw.h>
39	#include <sys/socket.h>
40	#include <sys/socketvar.h>
41	#include <sys/errno.h>
42	#include <sys/stat.h>
43	#include <sys/kernel.h>
44	#include <sys/sysctl.h>
45	#include <sys/syslog.h>
46
47	#include <net/if.h>
48	#include <net/route.h>
49
50	#include <netinet/in.h>
51	#include <netinet/in_systm.h>
52	#include <netinet/ip.h>
53	#include <netinet/in_pcb.h>
54	#include <netinet/in_var.h>
55	#include <netinet/ip_var.h>
56	#include <netinet/ip_icmp.h>
57	#include <netinet/udp.h>
58	#include <netinet/udp_var.h>
59
60	/*
61	* UDP protocol implementation.
62	* Per RFC 768, August, 1980.
63	*/
64	#ifndef COMPAT_42
65	static int udpcksum = 1;
66	#else
67	static int udpcksum = 0; /* XXX */
68	#endif
69	SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
70	&udpcksum, 0, "");
71
72	static int log_in_vain = 0;
73	SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
74	&log_in_vain, 0, "");
75
76	struct inpcbhead udb; /* from udp_var.h */
77	struct inpcbinfo udbinfo;
78
79	#ifndef UDBHASHSIZE
80	#define UDBHASHSIZE 64
81	#endif
82
83	struct udpstat udpstat; /* from udp_var.h */
84	SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
85	&udpstat, udpstat, "");
86
87	static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
88
89	static void udp_detach(struct inpcb *);
90	static int udp_output(struct inpcb , struct mbuf , struct mbuf *,
91	struct mbuf *);
92	static void udp_notify(struct inpcb *, int);
93
94	void
95	udp_init(void)
96	{
97	LIST_INIT(&udb);
98	udbinfo.listhead = &udb;
99	udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
100	}
101
102	void
103	udp_input(struct mbuf *m, int iphlen)
104	{
105	register struct ip *ip;
106	register struct udphdr *uh;
107	register struct inpcb *inp;
108	struct mbuf *opts = 0;
109	int len;
110	struct ip save_ip;
111
112	udpstat.udps_ipackets++;
113
114	/*
115	* Strip IP options, if any; should skip this,
116	* make available to user, and use on returned packets,
117	* but we don't yet have a way to check the checksum
118	* with options still present.
119	*/
120	if (iphlen > sizeof (struct ip)) {
121	ip_stripoptions(m, (struct mbuf *)0);
122	iphlen = sizeof(struct ip);
123	}
124
125	/*
126	* Get IP and UDP header together in first mbuf.
127	*/
128	ip = mtod(m, struct ip *);
129	if (m->m_len < iphlen + sizeof(struct udphdr)) {
130	if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
131	udpstat.udps_hdrops++;
132	return;
133	}
134	ip = mtod(m, struct ip *);
135	}
136	uh = (struct udphdr *)((caddr_t)ip + iphlen);
137
138	/*
139	* Make mbuf data length reflect UDP length.
140	* If not enough data to reflect UDP length, drop.
141	*/
142	len = ntohs((u_short)uh->uh_ulen);
143	if (ip->ip_len != len) {
144	if (len > ip->ip_len \|\| len < sizeof(struct udphdr)) {
145	udpstat.udps_badlen++;
146	goto bad;
147	}
148	m_adj(m, len - ip->ip_len);
149	/* ip->ip_len = len; */
150	}
151	/*
152	* Save a copy of the IP header in case we want restore it
153	* for sending an ICMP error message in response.
154	*/
155	save_ip = *ip;
156
157	/*
158	* Checksum extended UDP header and data.
159	*/
160	if (uh->uh_sum) {
161	((struct ipovly *)ip)->ih_next = 0;
162	((struct ipovly *)ip)->ih_prev = 0;
163	((struct ipovly *)ip)->ih_x1 = 0;
164	((struct ipovly *)ip)->ih_len = uh->uh_ulen;
165	uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
166	if (uh->uh_sum) {
167	udpstat.udps_badsum++;
168	m_freem(m);
169	return;
170	}
171	}
172
173	if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) \|\|
174	in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
175	struct inpcb *last;
176	/*
177	* Deliver a multicast or broadcast datagram to all sockets
178	* for which the local and remote addresses and ports match
179	* those of the incoming datagram. This allows more than
180	* one process to receive multi/broadcasts on the same port.
181	* (This really ought to be done for unicast datagrams as
182	* well, but that would cause problems with existing
183	* applications that open both address-specific sockets and
184	* a wildcard socket listening to the same port -- they would
185	* end up receiving duplicates of every unicast datagram.
186	* Those applications open the multiple sockets to overcome an
187	* inadequacy of the UDP socket interface, but for backwards
188	* compatibility we avoid the problem here rather than
189	* fixing the interface. Maybe 4.5BSD will remedy this?)
190	*/
191
192	/*
193	* Construct sockaddr format source address.
194	*/
195	udp_in.sin_port = uh->uh_sport;
196	udp_in.sin_addr = ip->ip_src;
197	m->m_len -= sizeof (struct udpiphdr);
198	m->m_data += sizeof (struct udpiphdr);
199	/*
200	* Locate pcb(s) for datagram.
201	* (Algorithm copied from raw_intr().)
202	*/
203	last = NULL;
204	for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) {
205	if (inp->inp_lport != uh->uh_dport)
206	continue;
207	if (inp->inp_laddr.s_addr != INADDR_ANY) {
208	if (inp->inp_laddr.s_addr !=
209	ip->ip_dst.s_addr)
210	continue;
211	}
212	if (inp->inp_faddr.s_addr != INADDR_ANY) {
213	if (inp->inp_faddr.s_addr !=
214	ip->ip_src.s_addr \|\|
215	inp->inp_fport != uh->uh_sport)
216	continue;
217	}
218
219	if (last != NULL) {
220	struct mbuf *n;
221
222	if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
223	if (last->inp_flags & INP_CONTROLOPTS
224	\|\| last->inp_socket->so_options & SO_TIMESTAMP)
225	ip_savecontrol(last, &opts, ip, n);
226	if (sbappendaddr(&last->inp_socket->so_rcv,
227	(struct sockaddr *)&udp_in,
228	n, opts) == 0) {
229	m_freem(n);
230	if (opts)
231	m_freem(opts);
232	udpstat.udps_fullsock++;
233	} else
234	sorwakeup(last->inp_socket);
235	opts = 0;
236	}
237	}
238	last = inp;
239	/*
240	* Don't look for additional matches if this one does
241	* not have either the SO_REUSEPORT or SO_REUSEADDR
242	* socket options set. This heuristic avoids searching
243	* through all pcbs in the common case of a non-shared
244	* port. It * assumes that an application will never
245	* clear these options after setting them.
246	*/
247	if (((last->inp_socket->so_options&(SO_REUSEPORT\|SO_REUSEADDR)) == 0))
248	break;
249	}
250
251	if (last == NULL) {
252	/*
253	* No matching pcb found; discard datagram.
254	* (No need to send an ICMP Port Unreachable
255	* for a broadcast or multicast datgram.)
256	*/
257	udpstat.udps_noportbcast++;
258	goto bad;
259	}
260	if (last->inp_flags & INP_CONTROLOPTS
261	\|\| last->inp_socket->so_options & SO_TIMESTAMP)
262	ip_savecontrol(last, &opts, ip, m);
263	if (sbappendaddr(&last->inp_socket->so_rcv,
264	(struct sockaddr *)&udp_in,
265	m, opts) == 0) {
266	udpstat.udps_fullsock++;
267	goto bad;
268	}
269	sorwakeup(last->inp_socket);
270	return;
271	}
272	/*
273	* Locate pcb for datagram.
274	*/
275	inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport,
276	ip->ip_dst, uh->uh_dport, 1);
277	if (inp == NULL) {
278	if (log_in_vain) {
279	char buf[4*sizeof "123"];
280
281	strcpy(buf, inet_ntoa(ip->ip_dst));
282	log(LOG_INFO, "Connection attempt to UDP %s:%d"
283	" from %s:%d\n",
284	buf, ntohs(uh->uh_dport),
285	inet_ntoa(ip->ip_src), ntohs(uh->uh_sport));
286	}
287	udpstat.udps_noport++;
288	if (m->m_flags & (M_BCAST \| M_MCAST)) {
289	udpstat.udps_noportbcast++;
290	goto bad;
291	}
292	*ip = save_ip;
293	icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
294	return;
295	}
296
297	/*
298	* Construct sockaddr format source address.
299	* Stuff source address and datagram in user buffer.
300	*/
301	udp_in.sin_port = uh->uh_sport;
302	udp_in.sin_addr = ip->ip_src;
303	if (inp->inp_flags & INP_CONTROLOPTS
304	\|\| inp->inp_socket->so_options & SO_TIMESTAMP)
305	ip_savecontrol(inp, &opts, ip, m);
306	iphlen += sizeof(struct udphdr);
307	m->m_len -= iphlen;
308	m->m_pkthdr.len -= iphlen;
309	m->m_data += iphlen;
310	if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in,
311	m, opts) == 0) {
312	udpstat.udps_fullsock++;
313	goto bad;
314	}
315	sorwakeup(inp->inp_socket);
316	return;
317	bad:
318	m_freem(m);
319	if (opts)
320	m_freem(opts);
321	}
322
323	/*
324	* Notify a udp user of an asynchronous error;
325	* just wake up so that he can collect error status.
326	*/
327	static void
328	udp_notify(struct inpcb *inp, int errnum)
329	{
330	inp->inp_socket->so_error = errnum;
331	sorwakeup(inp->inp_socket);
332	sowwakeup(inp->inp_socket);
333	}
334
335	void
336	udp_ctlinput(int cmd, struct sockaddr sa, void vip)
337	{
338	register struct ip *ip = vip;
339	register struct udphdr *uh;
340
341	if (!PRC_IS_REDIRECT(cmd) &&
342	((unsigned)cmd >= PRC_NCMDS \|\| inetctlerrmap[cmd] == 0))
343	return;
344	if (ip) {
345	uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
346	in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
347	cmd, udp_notify);
348	} else
349	in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
350	}
351
352	static int
353	udp_output(struct inpcb inp, struct mbuf m, struct mbuf *addr,
354	struct mbuf *control)
355	{
356	register struct udpiphdr *ui;
357	register int len = m->m_pkthdr.len;
358	struct in_addr laddr;
359	int s = 0, error = 0;
360
361	laddr.s_addr = 0;
362	if (control)
363	m_freem(control); /* XXX */
364
365	if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
366	error = EMSGSIZE;
367	goto release;
368	}
369
370	if (addr) {
371	laddr = inp->inp_laddr;
372	if (inp->inp_faddr.s_addr != INADDR_ANY) {
373	error = EISCONN;
374	goto release;
375	}
376	/*
377	* Must block input while temporarily connected.
378	*/
379	s = splnet();
380	error = in_pcbconnect(inp, addr);
381	if (error) {
382	splx(s);
383	goto release;
384	}
385	} else {
386	if (inp->inp_faddr.s_addr == INADDR_ANY) {
387	error = ENOTCONN;
388	goto release;
389	}
390	}
391	/*
392	* Calculate data length and get a mbuf
393	* for UDP and IP headers.
394	*/
395	M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
396	if (m == 0) {
397	error = ENOBUFS;
398	if (addr)
399	splx(s);
400	goto release;
401	}
402
403	/*
404	* Fill in mbuf with extended UDP header
405	* and addresses and length put into network format.
406	*/
407	ui = mtod(m, struct udpiphdr *);
408	ui->ui_next = ui->ui_prev = 0;
409	ui->ui_x1 = 0;
410	ui->ui_pr = IPPROTO_UDP;
411	ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
412	ui->ui_src = inp->inp_laddr;
413	ui->ui_dst = inp->inp_faddr;
414	ui->ui_sport = inp->inp_lport;
415	ui->ui_dport = inp->inp_fport;
416	ui->ui_ulen = ui->ui_len;
417
418	/*
419	* Stuff checksum and output datagram.
420	*/
421	ui->ui_sum = 0;
422	if (udpcksum) {
423	if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
424	ui->ui_sum = 0xffff;
425	}
426	((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
427	((struct ip )ui)->ip_ttl = inp->inp_ip_ttl; / XXX */
428	((struct ip )ui)->ip_tos = inp->inp_ip_tos; / XXX */
429	udpstat.udps_opackets++;
430	error = ip_output(m, inp->inp_options, &inp->inp_route,
431	inp->inp_socket->so_options & (SO_DONTROUTE \| SO_BROADCAST),
432	inp->inp_moptions);
433
434	if (addr) {
435	in_pcbdisconnect(inp);
436	inp->inp_laddr = laddr;
437	splx(s);
438	}
439	return (error);
440
441	release:
442	m_freem(m);
443	return (error);
444	}
445
446	#ifdef __rtems__
447	#define INP_INFO_RLOCK(a)
448	#define INP_INFO_RUNLOCK(a)
449	#define INP_LOCK(a)
450	#define INP_UNLOCK(a)
451	#endif
452
453	static int
454	udp_pcblist(SYSCTL_HANDLER_ARGS)
455	{
456	int error, i, n, s;
457	struct inpcb inp, *inp_list;
458	inp_gen_t gencnt;
459	struct xinpgen xig;
460
461	/*
462	* The process of preparing the TCB list is too time-consuming and
463	* resource-intensive to repeat twice on every request.
464	*/
465	if (req->oldptr == 0) {
466	n = udbinfo.ipi_count;
467	req->oldidx = 2 * (sizeof xig)
468	+ (n + n/8) * sizeof(struct xinpcb);
469	return 0;
470	}
471
472	if (req->newptr != 0)
473	return EPERM;
474
475	/*
476	* OK, now we're committed to doing something.
477	*/
478	s = splnet();
479	gencnt = udbinfo.ipi_gencnt;
480	n = udbinfo.ipi_count;
481	splx(s);
482
483	sysctl_wire_old_buffer(req, 2 * (sizeof xig)
484	+ n * sizeof(struct xinpcb));
485
486	xig.xig_len = sizeof xig;
487	xig.xig_count = n;
488	xig.xig_gen = gencnt;
489	#if 0
490	xig.xig_sogen = so_gencnt;
491	#endif
492	error = SYSCTL_OUT(req, &xig, sizeof xig);
493	if (error)
494	return error;
495
496	/* ccj add the exit if count is 0 */
497	if (!n)
498	return error;
499
500	inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
501	if (inp_list == 0)
502	return ENOMEM;
503
504	s = splnet();
505	INP_INFO_RLOCK(&udbinfo);
506	for (inp = LIST_FIRST(udbinfo.listhead), i = 0; inp && i < n;
507	inp = LIST_NEXT(inp, inp_list)) {
508	INP_LOCK(inp);
509	if (inp->inp_gencnt <= gencnt)
510	#if 0
511	&&
512	cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0)
513	#endif
514	inp_list[i++] = inp;
515	INP_UNLOCK(inp);
516	}
517	INP_INFO_RUNLOCK(&udbinfo);
518	splx(s);
519	n = i;
520
521	error = 0;
522	for (i = 0; i < n; i++) {
523	inp = inp_list[i];
524	INP_LOCK(inp);
525	if (inp->inp_gencnt <= gencnt) {
526	struct xinpcb xi;
527	xi.xi_len = sizeof xi;
528	/* XXX should avoid extra copy */
529	bcopy(inp, &xi.xi_inp, sizeof *inp);
530	#if 0
531	if (inp->inp_socket)
532	sotoxsocket(inp->inp_socket, &xi.xi_socket);
533	#endif
534	error = SYSCTL_OUT(req, &xi, sizeof xi);
535	}
536	INP_UNLOCK(inp);
537	}
538	if (!error) {
539	/*
540	* Give the user an updated idea of our state.
541	* If the generation differs from what we told
542	* her before, she knows that something happened
543	* while we were processing this request, and it
544	* might be necessary to retry.
545	*/
546	s = splnet();
547	INP_INFO_RLOCK(&udbinfo);
548	xig.xig_gen = udbinfo.ipi_gencnt;
549	#if 0
550	xig.xig_sogen = so_gencnt;
551	#endif
552	xig.xig_count = udbinfo.ipi_count;
553	INP_INFO_RUNLOCK(&udbinfo);
554	splx(s);
555	error = SYSCTL_OUT(req, &xig, sizeof xig);
556	}
557	free(inp_list, M_TEMP);
558	return error;
559	}
560
561	SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
562	udp_pcblist, "S,xinpcb", "List of active UDP sockets");
563
564	static u_long udp_sendspace = 9216; /* really max datagram size */
565	/* 40 1K datagrams */
566	SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
567	&udp_sendspace, 0, "");
568
569	static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
570	SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
571	&udp_recvspace, 0, "");
572
573	#if defined(__rtems__)
574	void rtems_set_udp_buffer_sizes(u_long sendspace, u_long recvspace)
575	{
576	if ( sendspace != 0 )
577	udp_sendspace = sendspace;
578	if ( recvspace != 0 )
579	udp_recvspace = recvspace;
580	}
581	#endif
582
583	/ARGSUSED/
584	int
585	udp_usrreq(struct socket so, int req, struct mbuf m, struct mbuf *addr,
586	struct mbuf *control)
587	{
588	struct inpcb *inp = sotoinpcb(so);
589	int error = 0;
590	int s;
591
592	if (req == PRU_CONTROL)
593	return (in_control(so, (u_long)m, (caddr_t)addr,
594	(struct ifnet *)control));
595	if (inp == NULL && req != PRU_ATTACH) {
596	error = EINVAL;
597	goto release;
598	}
599	/*
600	* Note: need to block udp_input while changing
601	* the udp pcb queue and/or pcb addresses.
602	*/
603	switch (req) {
604
605	case PRU_ATTACH:
606	if (inp != NULL) {
607	error = EINVAL;
608	break;
609	}
610	s = splnet();
611	error = in_pcballoc(so, &udbinfo);
612	splx(s);
613	if (error)
614	break;
615	error = soreserve(so, udp_sendspace, udp_recvspace);
616	if (error)
617	break;
618	((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl;
619	break;
620
621	case PRU_DETACH:
622	udp_detach(inp);
623	break;
624
625	case PRU_BIND:
626	s = splnet();
627	error = in_pcbbind(inp, addr);
628	splx(s);
629	break;
630
631	case PRU_LISTEN:
632	error = EOPNOTSUPP;
633	break;
634
635	case PRU_CONNECT:
636	if (inp->inp_faddr.s_addr != INADDR_ANY) {
637	error = EISCONN;
638	break;
639	}
640	s = splnet();
641	error = in_pcbconnect(inp, addr);
642	splx(s);
643	if (error == 0)
644	soisconnected(so);
645	break;
646
647	case PRU_CONNECT2:
648	error = EOPNOTSUPP;
649	break;
650
651	case PRU_ACCEPT:
652	error = EOPNOTSUPP;
653	break;
654
655	case PRU_DISCONNECT:
656	if (inp->inp_faddr.s_addr == INADDR_ANY) {
657	error = ENOTCONN;
658	break;
659	}
660	s = splnet();
661	in_pcbdisconnect(inp);
662	inp->inp_laddr.s_addr = INADDR_ANY;
663	splx(s);
664	so->so_state &= ~SS_ISCONNECTED; /* XXX */
665	break;
666
667	case PRU_SHUTDOWN:
668	socantsendmore(so);
669	break;
670
671	case PRU_SEND:
672	return (udp_output(inp, m, addr, control));
673
674	case PRU_ABORT:
675	soisdisconnected(so);
676	udp_detach(inp);
677	break;
678
679	case PRU_SOCKADDR:
680	in_setsockaddr(inp, addr);
681	break;
682
683	case PRU_PEERADDR:
684	in_setpeeraddr(inp, addr);
685	break;
686
687	case PRU_SENSE:
688	/*
689	* stat: don't bother with a blocksize.
690	*/
691	return (0);
692
693	case PRU_SENDOOB:
694	case PRU_FASTTIMO:
695	case PRU_SLOWTIMO:
696	case PRU_PROTORCV:
697	case PRU_PROTOSEND:
698	error = EOPNOTSUPP;
699	break;
700
701	case PRU_RCVD:
702	case PRU_RCVOOB:
703	return (EOPNOTSUPP); /* do not free mbuf's */
704
705	default:
706	panic("udp_usrreq");
707	}
708
709	release:
710	if (control) {
711	printf("udp control data unexpectedly retained\n");
712	m_freem(control);
713	}
714	if (m)
715	m_freem(m);
716	return (error);
717	}
718
719	static void
720	udp_detach(struct inpcb *inp)
721	{
722	int s = splnet();
723
724	in_pcbdetach(inp);
725	splx(s);
726	}

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