Context Navigation

source: rtems/cpukit/libnetworking/netinet/udp_usrreq.c @ e744c36

5

Last change on this file since e744c36 was e744c36, checked in by Sebastian Huber <sebastian.huber@…>, on 06/07/17 at 05:36:59

network: Use inet_ntoa_r()

Update #2833.

Property mode set to 100644

File size: 17.5 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	#ifdef HAVE_CONFIG_H
34	#include "config.h"
35	#endif
36
37	#include <sys/param.h>
38	#include <sys/queue.h>
39	#include <sys/systm.h>
40	#include <sys/malloc.h>
41	#include <sys/mbuf.h>
42	#include <sys/protosw.h>
43	#include <sys/socket.h>
44	#include <sys/socketvar.h>
45	#include <errno.h>
46	#include <sys/stat.h>
47	#include <sys/kernel.h>
48	#include <sys/sysctl.h>
49	#include <sys/syslog.h>
50
51	#include <net/if.h>
52	#include <net/route.h>
53
54	#include <netinet/in.h>
55	#include <rtems/rtems_netinet_in.h>
56	#include <netinet/in_systm.h>
57	#include <netinet/ip.h>
58	#include <netinet/in_pcb.h>
59	#include <netinet/in_var.h>
60	#include <netinet/ip_var.h>
61	#include <netinet/ip_icmp.h>
62	#include <netinet/udp.h>
63	#include <netinet/udp_var.h>
64
65	/*
66	* UDP protocol implementation.
67	* Per RFC 768, August, 1980.
68	*/
69	#ifndef COMPAT_42
70	static int udpcksum = 1;
71	#else
72	static int udpcksum = 0; /* XXX */
73	#endif
74	SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
75	&udpcksum, 0, "");
76
77	static int log_in_vain = 0;
78	SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
79	&log_in_vain, 0, "");
80
81	struct inpcbhead udb; /* from udp_var.h */
82	struct inpcbinfo udbinfo;
83
84	#ifndef UDBHASHSIZE
85	#define UDBHASHSIZE 64
86	#endif
87
88	struct udpstat udpstat; /* from udp_var.h */
89	SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
90	&udpstat, udpstat, "");
91
92	static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET, 0, {0}, {0} };
93
94	static void udp_detach(struct inpcb *);
95	static int udp_output(struct inpcb , struct mbuf , struct mbuf *,
96	struct mbuf *);
97	static void udp_notify(struct inpcb *, int);
98
99	void
100	udp_init(void)
101	{
102	LIST_INIT(&udb);
103	udbinfo.listhead = &udb;
104	udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
105	}
106
107	void
108	udp_input(struct mbuf *m, int iphlen)
109	{
110	register struct ip *ip;
111	register struct udphdr *uh;
112	register struct inpcb *inp;
113	struct mbuf *opts = 0;
114	int len;
115	struct ip save_ip;
116
117	udpstat.udps_ipackets++;
118
119	/*
120	* Strip IP options, if any; should skip this,
121	* make available to user, and use on returned packets,
122	* but we don't yet have a way to check the checksum
123	* with options still present.
124	*/
125	if (iphlen > sizeof (struct ip)) {
126	ip_stripoptions(m, (struct mbuf *)0);
127	iphlen = sizeof(struct ip);
128	}
129
130	/*
131	* Get IP and UDP header together in first mbuf.
132	*/
133	ip = mtod(m, struct ip *);
134	if (m->m_len < iphlen + sizeof(struct udphdr)) {
135	if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
136	udpstat.udps_hdrops++;
137	return;
138	}
139	ip = mtod(m, struct ip *);
140	}
141	uh = (struct udphdr *)((caddr_t)ip + iphlen);
142
143	/*
144	* Make mbuf data length reflect UDP length.
145	* If not enough data to reflect UDP length, drop.
146	*/
147	len = ntohs((u_short)uh->uh_ulen);
148	if (ip->ip_len != len) {
149	if (len > ip->ip_len \|\| len < sizeof(struct udphdr)) {
150	udpstat.udps_badlen++;
151	goto bad;
152	}
153	m_adj(m, len - ip->ip_len);
154	/* ip->ip_len = len; */
155	}
156	/*
157	* Save a copy of the IP header in case we want restore it
158	* for sending an ICMP error message in response.
159	*/
160	save_ip = *ip;
161
162	/*
163	* Checksum extended UDP header and data.
164	*/
165	if (uh->uh_sum) {
166	((struct ipovly *)ip)->ih_next = 0;
167	((struct ipovly *)ip)->ih_prev = 0;
168	((struct ipovly *)ip)->ih_x1 = 0;
169	((struct ipovly *)ip)->ih_len = uh->uh_ulen;
170	uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
171	if (uh->uh_sum) {
172	udpstat.udps_badsum++;
173	m_freem(m);
174	return;
175	}
176	}
177
178	if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) \|\|
179	in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
180	struct inpcb *last;
181	/*
182	* Deliver a multicast or broadcast datagram to all sockets
183	* for which the local and remote addresses and ports match
184	* those of the incoming datagram. This allows more than
185	* one process to receive multi/broadcasts on the same port.
186	* (This really ought to be done for unicast datagrams as
187	* well, but that would cause problems with existing
188	* applications that open both address-specific sockets and
189	* a wildcard socket listening to the same port -- they would
190	* end up receiving duplicates of every unicast datagram.
191	* Those applications open the multiple sockets to overcome an
192	* inadequacy of the UDP socket interface, but for backwards
193	* compatibility we avoid the problem here rather than
194	* fixing the interface. Maybe 4.5BSD will remedy this?)
195	*/
196
197	/*
198	* Construct sockaddr format source address.
199	*/
200	udp_in.sin_port = uh->uh_sport;
201	udp_in.sin_addr = ip->ip_src;
202	m->m_len -= sizeof (struct udpiphdr);
203	m->m_data += sizeof (struct udpiphdr);
204	/*
205	* Locate pcb(s) for datagram.
206	* (Algorithm copied from raw_intr().)
207	*/
208	last = NULL;
209	for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) {
210	if (inp->inp_lport != uh->uh_dport)
211	continue;
212	if (inp->inp_laddr.s_addr != INADDR_ANY) {
213	if (inp->inp_laddr.s_addr !=
214	ip->ip_dst.s_addr)
215	continue;
216	}
217	if (inp->inp_faddr.s_addr != INADDR_ANY) {
218	if (inp->inp_faddr.s_addr !=
219	ip->ip_src.s_addr \|\|
220	inp->inp_fport != uh->uh_sport)
221	continue;
222	}
223
224	if (last != NULL) {
225	struct mbuf *n;
226
227	if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
228	if (last->inp_flags & INP_CONTROLOPTS
229	\|\| last->inp_socket->so_options & SO_TIMESTAMP)
230	ip_savecontrol(last, &opts, ip, n);
231	if (sbappendaddr(&last->inp_socket->so_rcv,
232	(struct sockaddr *)&udp_in,
233	n, opts) == 0) {
234	m_freem(n);
235	if (opts)
236	m_freem(opts);
237	udpstat.udps_fullsock++;
238	} else
239	sorwakeup(last->inp_socket);
240	opts = 0;
241	}
242	}
243	last = inp;
244	/*
245	* Don't look for additional matches if this one does
246	* not have either the SO_REUSEPORT or SO_REUSEADDR
247	* socket options set. This heuristic avoids searching
248	* through all pcbs in the common case of a non-shared
249	* port. It * assumes that an application will never
250	* clear these options after setting them.
251	*/
252	if (((last->inp_socket->so_options&(SO_REUSEPORT\|SO_REUSEADDR)) == 0))
253	break;
254	}
255
256	if (last == NULL) {
257	/*
258	* No matching pcb found; discard datagram.
259	* (No need to send an ICMP Port Unreachable
260	* for a broadcast or multicast datgram.)
261	*/
262	udpstat.udps_noportbcast++;
263	goto bad;
264	}
265	if (last->inp_flags & INP_CONTROLOPTS
266	\|\| last->inp_socket->so_options & SO_TIMESTAMP)
267	ip_savecontrol(last, &opts, ip, m);
268	if (sbappendaddr(&last->inp_socket->so_rcv,
269	(struct sockaddr *)&udp_in,
270	m, opts) == 0) {
271	udpstat.udps_fullsock++;
272	goto bad;
273	}
274	sorwakeup(last->inp_socket);
275	return;
276	}
277	/*
278	* Locate pcb for datagram.
279	*/
280	inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport,
281	ip->ip_dst, uh->uh_dport, 1);
282	if (inp == NULL) {
283	if (log_in_vain) {
284	char buf0[INET_ADDRSTRLEN];
285	char buf1[INET_ADDRSTRLEN];
286
287	log(LOG_INFO, "Connection attempt to UDP %s:%d"
288	" from %s:%d\n",
289	inet_ntoa_r(ip->ip_dst, buf0), ntohs(uh->uh_dport),
290	inet_ntoa_r(ip->ip_src, buf1), ntohs(uh->uh_sport));
291	}
292	udpstat.udps_noport++;
293	if (m->m_flags & (M_BCAST \| M_MCAST)) {
294	udpstat.udps_noportbcast++;
295	goto bad;
296	}
297	*ip = save_ip;
298	icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
299	return;
300	}
301
302	/*
303	* Construct sockaddr format source address.
304	* Stuff source address and datagram in user buffer.
305	*/
306	udp_in.sin_port = uh->uh_sport;
307	udp_in.sin_addr = ip->ip_src;
308	if (inp->inp_flags & INP_CONTROLOPTS
309	\|\| inp->inp_socket->so_options & SO_TIMESTAMP)
310	ip_savecontrol(inp, &opts, ip, m);
311	iphlen += sizeof(struct udphdr);
312	m->m_len -= iphlen;
313	m->m_pkthdr.len -= iphlen;
314	m->m_data += iphlen;
315	if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in,
316	m, opts) == 0) {
317	udpstat.udps_fullsock++;
318	goto bad;
319	}
320	sorwakeup(inp->inp_socket);
321	return;
322	bad:
323	m_freem(m);
324	if (opts)
325	m_freem(opts);
326	}
327
328	/*
329	* Notify a udp user of an asynchronous error;
330	* just wake up so that he can collect error status.
331	*/
332	static void
333	udp_notify(struct inpcb *inp, int errnum)
334	{
335	inp->inp_socket->so_error = errnum;
336	sorwakeup(inp->inp_socket);
337	sowwakeup(inp->inp_socket);
338	}
339
340	void
341	udp_ctlinput(int cmd, struct sockaddr sa, void vip)
342	{
343	register struct ip *ip = vip;
344	register struct udphdr *uh;
345
346	if (!PRC_IS_REDIRECT(cmd) &&
347	((unsigned)cmd >= PRC_NCMDS \|\| inetctlerrmap[cmd] == 0))
348	return;
349	if (ip) {
350	uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
351	in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
352	cmd, udp_notify);
353	} else
354	in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
355	}
356
357	static int
358	udp_output(struct inpcb inp, struct mbuf m, struct mbuf *addr,
359	struct mbuf *control)
360	{
361	register struct udpiphdr *ui;
362	register int len = m->m_pkthdr.len;
363	struct in_addr laddr;
364	int s = 0, error = 0;
365
366	laddr.s_addr = 0;
367	if (control)
368	m_freem(control); /* XXX */
369
370	if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
371	error = EMSGSIZE;
372	goto release;
373	}
374
375	if (addr) {
376	laddr = inp->inp_laddr;
377	if (inp->inp_faddr.s_addr != INADDR_ANY) {
378	error = EISCONN;
379	goto release;
380	}
381	/*
382	* Must block input while temporarily connected.
383	*/
384	s = splnet();
385	error = in_pcbconnect(inp, addr);
386	if (error) {
387	splx(s);
388	goto release;
389	}
390	} else {
391	if (inp->inp_faddr.s_addr == INADDR_ANY) {
392	error = ENOTCONN;
393	goto release;
394	}
395	}
396	/*
397	* Calculate data length and get a mbuf
398	* for UDP and IP headers.
399	*/
400	M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
401	if (m == 0) {
402	error = ENOBUFS;
403	if (addr) {
404	in_pcbdisconnect(inp);
405	inp->inp_laddr = laddr;
406	splx(s);
407	}
408	goto release;
409	}
410
411	/*
412	* Fill in mbuf with extended UDP header
413	* and addresses and length put into network format.
414	*/
415	ui = mtod(m, struct udpiphdr *);
416	ui->ui_next = ui->ui_prev = 0;
417	ui->ui_x1 = 0;
418	ui->ui_pr = IPPROTO_UDP;
419	ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
420	ui->ui_src = inp->inp_laddr;
421	ui->ui_dst = inp->inp_faddr;
422	ui->ui_sport = inp->inp_lport;
423	ui->ui_dport = inp->inp_fport;
424	ui->ui_ulen = ui->ui_len;
425
426	/*
427	* Stuff checksum and output datagram.
428	*/
429	ui->ui_sum = 0;
430	if (udpcksum) {
431	if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
432	ui->ui_sum = 0xffff;
433	}
434	((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
435	((struct ip )ui)->ip_ttl = inp->inp_ip_ttl; / XXX */
436	((struct ip )ui)->ip_tos = inp->inp_ip_tos; / XXX */
437	udpstat.udps_opackets++;
438	error = ip_output(m, inp->inp_options, &inp->inp_route,
439	inp->inp_socket->so_options & (SO_DONTROUTE \| SO_BROADCAST),
440	inp->inp_moptions);
441
442	if (addr) {
443	in_pcbdisconnect(inp);
444	inp->inp_laddr = laddr;
445	splx(s);
446	}
447	return (error);
448
449	release:
450	m_freem(m);
451	return (error);
452	}
453
454	#ifdef __rtems__
455	#define INP_INFO_RLOCK(a)
456	#define INP_INFO_RUNLOCK(a)
457	#define INP_LOCK(a)
458	#define INP_UNLOCK(a)
459	#endif
460
461	static int
462	udp_pcblist(SYSCTL_HANDLER_ARGS)
463	{
464	int error, i, n, s;
465	struct inpcb inp, *inp_list;
466	inp_gen_t gencnt;
467	struct xinpgen xig;
468
469	/*
470	* The process of preparing the TCB list is too time-consuming and
471	* resource-intensive to repeat twice on every request.
472	*/
473	if (req->oldptr == 0) {
474	n = udbinfo.ipi_count;
475	req->oldidx = 2 * (sizeof xig)
476	+ (n + n/8) * sizeof(struct xinpcb);
477	return 0;
478	}
479
480	if (req->newptr != 0)
481	return EPERM;
482
483	/*
484	* OK, now we're committed to doing something.
485	*/
486	s = splnet();
487	gencnt = udbinfo.ipi_gencnt;
488	n = udbinfo.ipi_count;
489	splx(s);
490
491	sysctl_wire_old_buffer(req, 2 * (sizeof xig)
492	+ n * sizeof(struct xinpcb));
493
494	xig.xig_len = sizeof xig;
495	xig.xig_count = n;
496	xig.xig_gen = gencnt;
497	#if 0
498	xig.xig_sogen = so_gencnt;
499	#endif
500	error = SYSCTL_OUT(req, &xig, sizeof xig);
501	if (error)
502	return error;
503
504	/* ccj add the exit if count is 0 */
505	if (!n)
506	return error;
507
508	inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
509	if (inp_list == 0)
510	return ENOMEM;
511
512	s = splnet();
513	INP_INFO_RLOCK(&udbinfo);
514	for (inp = LIST_FIRST(udbinfo.listhead), i = 0; inp && i < n;
515	inp = LIST_NEXT(inp, inp_list)) {
516	INP_LOCK(inp);
517	if (inp->inp_gencnt <= gencnt)
518	#if 0
519	&&
520	cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0)
521	#endif
522	inp_list[i++] = inp;
523	INP_UNLOCK(inp);
524	}
525	INP_INFO_RUNLOCK(&udbinfo);
526	splx(s);
527	n = i;
528
529	error = 0;
530	for (i = 0; i < n; i++) {
531	inp = inp_list[i];
532	INP_LOCK(inp);
533	if (inp->inp_gencnt <= gencnt) {
534	struct xinpcb xi;
535	xi.xi_len = sizeof xi;
536	/* XXX should avoid extra copy */
537	bcopy(inp, &xi.xi_inp, sizeof *inp);
538	#if 0
539	if (inp->inp_socket)
540	sotoxsocket(inp->inp_socket, &xi.xi_socket);
541	#endif
542	error = SYSCTL_OUT(req, &xi, sizeof xi);
543	}
544	INP_UNLOCK(inp);
545	}
546	if (!error) {
547	/*
548	* Give the user an updated idea of our state.
549	* If the generation differs from what we told
550	* her before, she knows that something happened
551	* while we were processing this request, and it
552	* might be necessary to retry.
553	*/
554	s = splnet();
555	INP_INFO_RLOCK(&udbinfo);
556	xig.xig_gen = udbinfo.ipi_gencnt;
557	#if 0
558	xig.xig_sogen = so_gencnt;
559	#endif
560	xig.xig_count = udbinfo.ipi_count;
561	INP_INFO_RUNLOCK(&udbinfo);
562	splx(s);
563	error = SYSCTL_OUT(req, &xig, sizeof xig);
564	}
565	free(inp_list, M_TEMP);
566	return error;
567	}
568
569	SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
570	udp_pcblist, "S,xinpcb", "List of active UDP sockets");
571
572	static u_long udp_sendspace = 9216; /* really max datagram size */
573	/* 40 1K datagrams */
574	SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
575	&udp_sendspace, 0, "");
576
577	static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
578	SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
579	&udp_recvspace, 0, "");
580
581	#if defined(__rtems__)
582	void rtems_set_udp_buffer_sizes(u_long sendspace, u_long recvspace)
583	{
584	if ( sendspace != 0 )
585	udp_sendspace = sendspace;
586	if ( recvspace != 0 )
587	udp_recvspace = recvspace;
588	}
589	#endif
590
591	/ARGSUSED/
592	int
593	udp_usrreq(struct socket so, int req, struct mbuf m, struct mbuf *addr,
594	struct mbuf *control)
595	{
596	struct inpcb *inp = sotoinpcb(so);
597	int error = 0;
598	int s;
599
600	if (req == PRU_CONTROL)
601	return (in_control(so, (uintptr_t)m, (caddr_t)addr,
602	(struct ifnet *)control));
603	if (inp == NULL && req != PRU_ATTACH) {
604	error = EINVAL;
605	goto release;
606	}
607	/*
608	* Note: need to block udp_input while changing
609	* the udp pcb queue and/or pcb addresses.
610	*/
611	switch (req) {
612
613	case PRU_ATTACH:
614	if (inp != NULL) {
615	error = EINVAL;
616	break;
617	}
618	s = splnet();
619	error = in_pcballoc(so, &udbinfo);
620	splx(s);
621	if (error)
622	break;
623	error = soreserve(so, udp_sendspace, udp_recvspace);
624	if (error)
625	break;
626	((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl;
627	break;
628
629	case PRU_DETACH:
630	udp_detach(inp);
631	break;
632
633	case PRU_BIND:
634	s = splnet();
635	error = in_pcbbind(inp, addr);
636	splx(s);
637	break;
638
639	case PRU_LISTEN:
640	error = EOPNOTSUPP;
641	break;
642
643	case PRU_CONNECT:
644	if (inp->inp_faddr.s_addr != INADDR_ANY) {
645	error = EISCONN;
646	break;
647	}
648	s = splnet();
649	error = in_pcbconnect(inp, addr);
650	splx(s);
651	if (error == 0)
652	soisconnected(so);
653	break;
654
655	case PRU_CONNECT2:
656	error = EOPNOTSUPP;
657	break;
658
659	case PRU_ACCEPT:
660	error = EOPNOTSUPP;
661	break;
662
663	case PRU_DISCONNECT:
664	if (inp->inp_faddr.s_addr == INADDR_ANY) {
665	error = ENOTCONN;
666	break;
667	}
668	s = splnet();
669	in_pcbdisconnect(inp);
670	inp->inp_laddr.s_addr = INADDR_ANY;
671	splx(s);
672	so->so_state &= ~SS_ISCONNECTED; /* XXX */
673	break;
674
675	case PRU_SHUTDOWN:
676	socantsendmore(so);
677	break;
678
679	case PRU_SEND:
680	return (udp_output(inp, m, addr, control));
681
682	case PRU_ABORT:
683	soisdisconnected(so);
684	udp_detach(inp);
685	break;
686
687	case PRU_SOCKADDR:
688	in_setsockaddr(inp, addr);
689	break;
690
691	case PRU_PEERADDR:
692	in_setpeeraddr(inp, addr);
693	break;
694
695	case PRU_SENSE:
696	/*
697	* stat: don't bother with a blocksize.
698	*/
699	return (0);
700
701	case PRU_SENDOOB:
702	case PRU_FASTTIMO:
703	case PRU_SLOWTIMO:
704	case PRU_PROTORCV:
705	case PRU_PROTOSEND:
706	error = EOPNOTSUPP;
707	break;
708
709	case PRU_RCVD:
710	case PRU_RCVOOB:
711	return (EOPNOTSUPP); /* do not free mbuf's */
712
713	default:
714	panic("udp_usrreq");
715	}
716
717	release:
718	if (control) {
719	printf("udp control data unexpectedly retained\n");
720	m_freem(control);
721	}
722	if (m)
723	m_freem(m);
724	return (error);
725	}
726
727	static void
728	udp_detach(struct inpcb *inp)
729	{
730	int s = splnet();
731
732	in_pcbdetach(inp);
733	splx(s);
734	}

Note: See TracBrowser for help on using the repository browser.

Download in other formats: