1 /*-
2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
3 * The Regents of the University of California.
4 * Copyright (c) 2008 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
32 */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include "opt_ipfw.h"
38 #include "opt_inet6.h"
39 #include "opt_ipsec.h"
40 #include "opt_mac.h"
41
42 #include <sys/param.h>
43 #include <sys/domain.h>
44 #include <sys/eventhandler.h>
45 #include <sys/jail.h>
46 #include <sys/kernel.h>
47 #include <sys/lock.h>
48 #include <sys/malloc.h>
49 #include <sys/mbuf.h>
50 #include <sys/priv.h>
51 #include <sys/proc.h>
52 #include <sys/protosw.h>
53 #include <sys/signalvar.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/sx.h>
57 #include <sys/sysctl.h>
58 #include <sys/syslog.h>
59 #include <sys/systm.h>
60
61 #include <vm/uma.h>
62
63 #include <net/if.h>
64 #include <net/route.h>
65
66 #include <netinet/in.h>
67 #include <netinet/in_pcb.h>
68 #include <netinet/in_systm.h>
69 #include <netinet/in_var.h>
70 #include <netinet/ip.h>
71 #ifdef INET6
72 #include <netinet/ip6.h>
73 #endif
74 #include <netinet/ip_icmp.h>
75 #include <netinet/icmp_var.h>
76 #include <netinet/ip_var.h>
77 #include <netinet/ip_options.h>
78 #ifdef INET6
79 #include <netinet6/ip6_var.h>
80 #endif
81 #include <netinet/udp.h>
82 #include <netinet/udp_var.h>
83 #ifdef INET6
84 #include <netinet6/udp6_var.h>
85 #endif
86
87 #ifdef IPSEC
88 #include <netipsec/ipsec.h>
89 #endif
90
91 #include <machine/in_cksum.h>
92
93 #include <security/mac/mac_framework.h>
94
95 /*
96 * UDP protocol implementation.
97 * Per RFC 768, August, 1980.
98 */
99
100 /*
101 * BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
102 * removes the only data integrity mechanism for packets and malformed
103 * packets that would otherwise be discarded due to bad checksums, and may
104 * cause problems (especially for NFS data blocks).
105 */
106 static int udp_cksum = 1;
107 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, &udp_cksum,
108 0, "");
109
110 int udp_log_in_vain = 0;
111 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
112 &udp_log_in_vain, 0, "Log all incoming UDP packets");
113
114 int udp_blackhole = 0;
115 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW, &udp_blackhole, 0,
116 "Do not send port unreachables for refused connects");
117
118 u_long udp_sendspace = 9216; /* really max datagram size */
119 /* 40 1K datagrams */
120 SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
121 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
122
123 u_long udp_recvspace = 40 * (1024 +
124 #ifdef INET6
125 sizeof(struct sockaddr_in6)
126 #else
127 sizeof(struct sockaddr_in)
128 #endif
129 );
130
131 SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
132 &udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
133
134 static int udp_soreceive_dgram = 1;
135 SYSCTL_INT(_net_inet_udp, OID_AUTO, soreceive_dgram_enabled,
136 CTLFLAG_RD | CTLFLAG_TUN, &udp_soreceive_dgram, 0,
137 "Use experimental optimized datagram receive");
138
139 struct inpcbhead udb; /* from udp_var.h */
140 struct inpcbinfo udbinfo;
141 static uma_zone_t udpcb_zone;
142
143 #ifndef UDBHASHSIZE
144 #define UDBHASHSIZE 128
145 #endif
146
147 struct udpstat udpstat; /* from udp_var.h */
148 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW, &udpstat,
149 udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
150
151 static void udp_detach(struct socket *so);
152 static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
153 struct mbuf *, struct thread *);
154
155 static void
156 udp_zone_change(void *tag)
157 {
158
159 uma_zone_set_max(udbinfo.ipi_zone, maxsockets);
160 uma_zone_set_max(udpcb_zone, maxsockets);
161 }
162
163 static int
164 udp_inpcb_init(void *mem, int size, int flags)
165 {
166 struct inpcb *inp;
167
168 inp = mem;
169 INP_LOCK_INIT(inp, "inp", "udpinp");
170 return (0);
171 }
172
173 void
174 udp_init(void)
175 {
176
177 INP_INFO_LOCK_INIT(&udbinfo, "udp");
178 LIST_INIT(&udb);
179 udbinfo.ipi_listhead = &udb;
180 udbinfo.ipi_hashbase = hashinit(UDBHASHSIZE, M_PCB,
181 &udbinfo.ipi_hashmask);
182 udbinfo.ipi_porthashbase = hashinit(UDBHASHSIZE, M_PCB,
183 &udbinfo.ipi_porthashmask);
184 udbinfo.ipi_zone = uma_zcreate("udp_inpcb", sizeof(struct inpcb),
185 NULL, NULL, udp_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
186 uma_zone_set_max(udbinfo.ipi_zone, maxsockets);
187
188 udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
189 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
190 uma_zone_set_max(udpcb_zone, maxsockets);
191
192 EVENTHANDLER_REGISTER(maxsockets_change, udp_zone_change, NULL,
193 EVENTHANDLER_PRI_ANY);
194 TUNABLE_INT_FETCH("net.inet.udp.soreceive_dgram_enabled",
195 &udp_soreceive_dgram);
196 if (udp_soreceive_dgram) {
197 udp_usrreqs.pru_soreceive = soreceive_dgram;
198 #ifdef INET6
199 udp6_usrreqs.pru_soreceive = soreceive_dgram;
200 #endif
201 }
202 }
203
204 int
205 udp_newudpcb(struct inpcb *inp)
206 {
207 struct udpcb *up;
208
209 up = uma_zalloc(udpcb_zone, M_NOWAIT | M_ZERO);
210 if (up == NULL)
211 return (ENOBUFS);
212 inp->inp_ppcb = up;
213 return (0);
214 }
215
216 void
217 udp_discardcb(struct udpcb *up)
218 {
219
220 uma_zfree(udpcb_zone, up);
221 }
222
223 /*
224 * Subroutine of udp_input(), which appends the provided mbuf chain to the
225 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
226 * contains the source address. If the socket ends up being an IPv6 socket,
227 * udp_append() will convert to a sockaddr_in6 before passing the address
228 * into the socket code.
229 */
230 static void
231 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
232 struct sockaddr_in *udp_in)
233 {
234 struct sockaddr *append_sa;
235 struct socket *so;
236 struct mbuf *opts = 0;
237 #ifdef INET6
238 struct sockaddr_in6 udp_in6;
239 #endif
240
241 INP_RLOCK_ASSERT(inp);
242
243 #ifdef IPSEC
244 /* Check AH/ESP integrity. */
245 if (ipsec4_in_reject(n, inp)) {
246 m_freem(n);
247 ipsec4stat.in_polvio++;
248 return;
249 }
250 #endif /* IPSEC */
251 #ifdef MAC
252 if (mac_check_inpcb_deliver(inp, n) != 0) {
253 m_freem(n);
254 return;
255 }
256 #endif
257 if (inp->inp_flags & INP_CONTROLOPTS ||
258 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
259 #ifdef INET6
260 if (inp->inp_vflag & INP_IPV6)
261 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
262 else
263 #endif
264 ip_savecontrol(inp, &opts, ip, n);
265 }
266 #ifdef INET6
267 if (inp->inp_vflag & INP_IPV6) {
268 bzero(&udp_in6, sizeof(udp_in6));
269 udp_in6.sin6_len = sizeof(udp_in6);
270 udp_in6.sin6_family = AF_INET6;
271 in6_sin_2_v4mapsin6(udp_in, &udp_in6);
272 append_sa = (struct sockaddr *)&udp_in6;
273 } else
274 #endif
275 append_sa = (struct sockaddr *)udp_in;
276 m_adj(n, off);
277
278 so = inp->inp_socket;
279 SOCKBUF_LOCK(&so->so_rcv);
280 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
281 SOCKBUF_UNLOCK(&so->so_rcv);
282 m_freem(n);
283 if (opts)
284 m_freem(opts);
285 udpstat.udps_fullsock++;
286 } else
287 sorwakeup_locked(so);
288 }
289
290 void
291 udp_input(struct mbuf *m, int off)
292 {
293 int iphlen = off;
294 struct ip *ip;
295 struct udphdr *uh;
296 struct ifnet *ifp;
297 struct inpcb *inp;
298 int len;
299 struct ip save_ip;
300 struct sockaddr_in udp_in;
301 #ifdef IPFIREWALL_FORWARD
302 struct m_tag *fwd_tag;
303 #endif
304
305 ifp = m->m_pkthdr.rcvif;
306 udpstat.udps_ipackets++;
307
308 /*
309 * Strip IP options, if any; should skip this, make available to
310 * user, and use on returned packets, but we don't yet have a way to
311 * check the checksum with options still present.
312 */
313 if (iphlen > sizeof (struct ip)) {
314 ip_stripoptions(m, (struct mbuf *)0);
315 iphlen = sizeof(struct ip);
316 }
317
318 /*
319 * Get IP and UDP header together in first mbuf.
320 */
321 ip = mtod(m, struct ip *);
322 if (m->m_len < iphlen + sizeof(struct udphdr)) {
323 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
324 udpstat.udps_hdrops++;
325 return;
326 }
327 ip = mtod(m, struct ip *);
328 }
329 uh = (struct udphdr *)((caddr_t)ip + iphlen);
330
331 /*
332 * Destination port of 0 is illegal, based on RFC768.
333 */
334 if (uh->uh_dport == 0)
335 goto badunlocked;
336
337 /*
338 * Construct sockaddr format source address. Stuff source address
339 * and datagram in user buffer.
340 */
341 bzero(&udp_in, sizeof(udp_in));
342 udp_in.sin_len = sizeof(udp_in);
343 udp_in.sin_family = AF_INET;
344 udp_in.sin_port = uh->uh_sport;
345 udp_in.sin_addr = ip->ip_src;
346
347 /*
348 * Make mbuf data length reflect UDP length. If not enough data to
349 * reflect UDP length, drop.
350 */
351 len = ntohs((u_short)uh->uh_ulen);
352 if (ip->ip_len != len) {
353 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
354 udpstat.udps_badlen++;
355 goto badunlocked;
356 }
357 m_adj(m, len - ip->ip_len);
358 /* ip->ip_len = len; */
359 }
360
361 /*
362 * Save a copy of the IP header in case we want restore it for
363 * sending an ICMP error message in response.
364 */
365 if (!udp_blackhole)
366 save_ip = *ip;
367 else
368 memset(&save_ip, 0, sizeof(save_ip));
369
370 /*
371 * Checksum extended UDP header and data.
372 */
373 if (uh->uh_sum) {
374 u_short uh_sum;
375
376 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
377 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
378 uh_sum = m->m_pkthdr.csum_data;
379 else
380 uh_sum = in_pseudo(ip->ip_src.s_addr,
381 ip->ip_dst.s_addr, htonl((u_short)len +
382 m->m_pkthdr.csum_data + IPPROTO_UDP));
383 uh_sum ^= 0xffff;
384 } else {
385 char b[9];
386
387 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
388 bzero(((struct ipovly *)ip)->ih_x1, 9);
389 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
390 uh_sum = in_cksum(m, len + sizeof (struct ip));
391 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
392 }
393 if (uh_sum) {
394 udpstat.udps_badsum++;
395 m_freem(m);
396 return;
397 }
398 } else
399 udpstat.udps_nosum++;
400
401 #ifdef IPFIREWALL_FORWARD
402 /*
403 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
404 */
405 fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL);
406 if (fwd_tag != NULL) {
407 struct sockaddr_in *next_hop;
408
409 /*
410 * Do the hack.
411 */
412 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
413 ip->ip_dst = next_hop->sin_addr;
414 uh->uh_dport = ntohs(next_hop->sin_port);
415
416 /*
417 * Remove the tag from the packet. We don't need it anymore.
418 */
419 m_tag_delete(m, fwd_tag);
420 }
421 #endif
422
423 INP_INFO_RLOCK(&udbinfo);
424 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
425 in_broadcast(ip->ip_dst, ifp)) {
426 struct inpcb *last;
427 struct ip_moptions *imo;
428
429 last = NULL;
430 LIST_FOREACH(inp, &udb, inp_list) {
431 if (inp->inp_lport != uh->uh_dport)
432 continue;
433 #ifdef INET6
434 if ((inp->inp_vflag & INP_IPV4) == 0)
435 continue;
436 #endif
437 if (inp->inp_laddr.s_addr != INADDR_ANY &&
438 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
439 continue;
440 if (inp->inp_faddr.s_addr != INADDR_ANY &&
441 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
442 continue;
443 /*
444 * XXX: Do not check source port of incoming datagram
445 * unless inp_connect() has been called to bind the
446 * fport part of the 4-tuple; the source could be
447 * trying to talk to us with an ephemeral port.
448 */
449 if (inp->inp_fport != 0 &&
450 inp->inp_fport != uh->uh_sport)
451 continue;
452
453 INP_RLOCK(inp);
454
455 /*
456 * Handle socket delivery policy for any-source
457 * and source-specific multicast. [RFC3678]
458 */
459 imo = inp->inp_moptions;
460 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
461 imo != NULL) {
462 struct sockaddr_in sin;
463 struct in_msource *ims;
464 int blocked, mode;
465 size_t idx;
466
467 bzero(&sin, sizeof(struct sockaddr_in));
468 sin.sin_len = sizeof(struct sockaddr_in);
469 sin.sin_family = AF_INET;
470 sin.sin_addr = ip->ip_dst;
471
472 blocked = 0;
473 idx = imo_match_group(imo, ifp,
474 (struct sockaddr *)&sin);
475 if (idx == -1) {
476 /*
477 * No group membership for this socket.
478 * Do not bump udps_noportbcast, as
479 * this will happen further down.
480 */
481 blocked++;
482 } else {
483 /*
484 * Check for a multicast source filter
485 * entry on this socket for this group.
486 * MCAST_EXCLUDE is the default
487 * behaviour. It means default accept;
488 * entries, if present, denote sources
489 * to be excluded from delivery.
490 */
491 ims = imo_match_source(imo, idx,
492 (struct sockaddr *)&udp_in);
493 mode = imo->imo_mfilters[idx].imf_fmode;
494 if ((ims != NULL &&
495 mode == MCAST_EXCLUDE) ||
496 (ims == NULL &&
497 mode == MCAST_INCLUDE)) {
498 #ifdef DIAGNOSTIC
499 if (bootverbose) {
500 printf("%s: blocked by"
501 " source filter\n",
502 __func__);
503 }
504 #endif
505 udpstat.udps_filtermcast++;
506 blocked++;
507 }
508 }
509 if (blocked != 0) {
510 INP_RUNLOCK(inp);
511 continue;
512 }
513 }
514 if (last != NULL) {
515 struct mbuf *n;
516
517 n = m_copy(m, 0, M_COPYALL);
518 if (n != NULL)
519 udp_append(last, ip, n, iphlen +
520 sizeof(struct udphdr), &udp_in);
521 INP_RUNLOCK(last);
522 }
523 last = inp;
524 /*
525 * Don't look for additional matches if this one does
526 * not have either the SO_REUSEPORT or SO_REUSEADDR
527 * socket options set. This heuristic avoids
528 * searching through all pcbs in the common case of a
529 * non-shared port. It assumes that an application
530 * will never clear these options after setting them.
531 */
532 if ((last->inp_socket->so_options &
533 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
534 break;
535 }
536
537 if (last == NULL) {
538 /*
539 * No matching pcb found; discard datagram. (No need
540 * to send an ICMP Port Unreachable for a broadcast
541 * or multicast datgram.)
542 */
543 udpstat.udps_noportbcast++;
544 goto badheadlocked;
545 }
546 udp_append(last, ip, m, iphlen + sizeof(struct udphdr),
547 &udp_in);
548 INP_RUNLOCK(last);
549 INP_INFO_RUNLOCK(&udbinfo);
550 return;
551 }
552
553 /*
554 * Locate pcb for datagram.
555 */
556 inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport,
557 ip->ip_dst, uh->uh_dport, 1, ifp);
558 if (inp == NULL) {
559 if (udp_log_in_vain) {
560 char buf[4*sizeof "123"];
561
562 strcpy(buf, inet_ntoa(ip->ip_dst));
563 log(LOG_INFO,
564 "Connection attempt to UDP %s:%d from %s:%d\n",
565 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
566 ntohs(uh->uh_sport));
567 }
568 udpstat.udps_noport++;
569 if (m->m_flags & (M_BCAST | M_MCAST)) {
570 udpstat.udps_noportbcast++;
571 goto badheadlocked;
572 }
573 if (udp_blackhole)
574 goto badheadlocked;
575 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
576 goto badheadlocked;
577 *ip = save_ip;
578 ip->ip_len += iphlen;
579 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
580 INP_INFO_RUNLOCK(&udbinfo);
581 return;
582 }
583
584 /*
585 * Check the minimum TTL for socket.
586 */
587 INP_RLOCK(inp);
588 INP_INFO_RUNLOCK(&udbinfo);
589 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
590 INP_RUNLOCK(inp);
591 goto badunlocked;
592 }
593 udp_append(inp, ip, m, iphlen + sizeof(struct udphdr), &udp_in);
594 INP_RUNLOCK(inp);
595 return;
596
597 badheadlocked:
598 if (inp)
599 INP_RUNLOCK(inp);
600 INP_INFO_RUNLOCK(&udbinfo);
601 badunlocked:
602 m_freem(m);
603 }
604
605 /*
606 * Notify a udp user of an asynchronous error; just wake up so that they can
607 * collect error status.
608 */
609 struct inpcb *
610 udp_notify(struct inpcb *inp, int errno)
611 {
612
613 /*
614 * While udp_ctlinput() always calls udp_notify() with a read lock
615 * when invoking it directly, in_pcbnotifyall() currently uses write
616 * locks due to sharing code with TCP. For now, accept either a read
617 * or a write lock, but a read lock is sufficient.
618 */
619 INP_LOCK_ASSERT(inp);
620
621 inp->inp_socket->so_error = errno;
622 sorwakeup(inp->inp_socket);
623 sowwakeup(inp->inp_socket);
624 return (inp);
625 }
626
627 void
628 udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
629 {
630 struct ip *ip = vip;
631 struct udphdr *uh;
632 struct in_addr faddr;
633 struct inpcb *inp;
634
635 faddr = ((struct sockaddr_in *)sa)->sin_addr;
636 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
637 return;
638
639 /*
640 * Redirects don't need to be handled up here.
641 */
642 if (PRC_IS_REDIRECT(cmd))
643 return;
644
645 /*
646 * Hostdead is ugly because it goes linearly through all PCBs.
647 *
648 * XXX: We never get this from ICMP, otherwise it makes an excellent
649 * DoS attack on machines with many connections.
650 */
651 if (cmd == PRC_HOSTDEAD)
652 ip = NULL;
653 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
654 return;
655 if (ip != NULL) {
656 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
657 INP_INFO_RLOCK(&udbinfo);
658 inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport,
659 ip->ip_src, uh->uh_sport, 0, NULL);
660 if (inp != NULL) {
661 INP_RLOCK(inp);
662 if (inp->inp_socket != NULL) {
663 udp_notify(inp, inetctlerrmap[cmd]);
664 }
665 INP_RUNLOCK(inp);
666 }
667 INP_INFO_RUNLOCK(&udbinfo);
668 } else
669 in_pcbnotifyall(&udbinfo, faddr, inetctlerrmap[cmd],
670 udp_notify);
671 }
672
673 static int
674 udp_pcblist(SYSCTL_HANDLER_ARGS)
675 {
676 int error, i, n;
677 struct inpcb *inp, **inp_list;
678 inp_gen_t gencnt;
679 struct xinpgen xig;
680
681 /*
682 * The process of preparing the PCB list is too time-consuming and
683 * resource-intensive to repeat twice on every request.
684 */
685 if (req->oldptr == 0) {
686 n = udbinfo.ipi_count;
687 n += imax(n / 8, 10);
688 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
689 return (0);
690 }
691
692 if (req->newptr != 0)
693 return (EPERM);
694
695 /*
696 * OK, now we're committed to doing something.
697 */
698 INP_INFO_RLOCK(&udbinfo);
699 gencnt = udbinfo.ipi_gencnt;
700 n = udbinfo.ipi_count;
701 INP_INFO_RUNLOCK(&udbinfo);
702
703 error = sysctl_wire_old_buffer(req, 2 * (sizeof xig)
704 + n * sizeof(struct xinpcb));
705 if (error != 0)
706 return (error);
707
708 xig.xig_len = sizeof xig;
709 xig.xig_count = n;
710 xig.xig_gen = gencnt;
711 xig.xig_sogen = so_gencnt;
712 error = SYSCTL_OUT(req, &xig, sizeof xig);
713 if (error)
714 return (error);
715
716 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
717 if (inp_list == 0)
718 return (ENOMEM);
719
720 INP_INFO_RLOCK(&udbinfo);
721 for (inp = LIST_FIRST(udbinfo.ipi_listhead), i = 0; inp && i < n;
722 inp = LIST_NEXT(inp, inp_list)) {
723 INP_RLOCK(inp);
724 if (inp->inp_gencnt <= gencnt &&
725 cr_canseeinpcb(req->td->td_ucred, inp) == 0)
726 inp_list[i++] = inp;
727 INP_RUNLOCK(inp);
728 }
729 INP_INFO_RUNLOCK(&udbinfo);
730 n = i;
731
732 error = 0;
733 for (i = 0; i < n; i++) {
734 inp = inp_list[i];
735 INP_RLOCK(inp);
736 if (inp->inp_gencnt <= gencnt) {
737 struct xinpcb xi;
738 bzero(&xi, sizeof(xi));
739 xi.xi_len = sizeof xi;
740 /* XXX should avoid extra copy */
741 bcopy(inp, &xi.xi_inp, sizeof *inp);
742 if (inp->inp_socket)
743 sotoxsocket(inp->inp_socket, &xi.xi_socket);
744 xi.xi_inp.inp_gencnt = inp->inp_gencnt;
745 INP_RUNLOCK(inp);
746 error = SYSCTL_OUT(req, &xi, sizeof xi);
747 } else
748 INP_RUNLOCK(inp);
749 }
750 if (!error) {
751 /*
752 * Give the user an updated idea of our state. If the
753 * generation differs from what we told her before, she knows
754 * that something happened while we were processing this
755 * request, and it might be necessary to retry.
756 */
757 INP_INFO_RLOCK(&udbinfo);
758 xig.xig_gen = udbinfo.ipi_gencnt;
759 xig.xig_sogen = so_gencnt;
760 xig.xig_count = udbinfo.ipi_count;
761 INP_INFO_RUNLOCK(&udbinfo);
762 error = SYSCTL_OUT(req, &xig, sizeof xig);
763 }
764 free(inp_list, M_TEMP);
765 return (error);
766 }
767
768 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
769 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
770
771 static int
772 udp_getcred(SYSCTL_HANDLER_ARGS)
773 {
774 struct xucred xuc;
775 struct sockaddr_in addrs[2];
776 struct inpcb *inp;
777 int error;
778
779 error = priv_check(req->td, PRIV_NETINET_GETCRED);
780 if (error)
781 return (error);
782 error = SYSCTL_IN(req, addrs, sizeof(addrs));
783 if (error)
784 return (error);
785 INP_INFO_RLOCK(&udbinfo);
786 inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
787 addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
788 if (inp != NULL) {
789 INP_RLOCK(inp);
790 INP_INFO_RUNLOCK(&udbinfo);
791 if (inp->inp_socket == NULL)
792 error = ENOENT;
793 if (error == 0)
794 error = cr_canseeinpcb(req->td->td_ucred, inp);
795 if (error == 0)
796 cru2x(inp->inp_cred, &xuc);
797 INP_RUNLOCK(inp);
798 } else {
799 INP_INFO_RUNLOCK(&udbinfo);
800 error = ENOENT;
801 }
802 if (error == 0)
803 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
804 return (error);
805 }
806
807 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
808 CTLTYPE_OPAQUE|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0,
809 udp_getcred, "S,xucred", "Get the xucred of a UDP connection");
810
811 static int
812 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
813 struct mbuf *control, struct thread *td)
814 {
815 struct udpiphdr *ui;
816 int len = m->m_pkthdr.len;
817 struct in_addr faddr, laddr;
818 struct cmsghdr *cm;
819 struct sockaddr_in *sin, src;
820 int error = 0;
821 int ipflags;
822 u_short fport, lport;
823 int unlock_udbinfo;
824
825 /*
826 * udp_output() may need to temporarily bind or connect the current
827 * inpcb. As such, we don't know up front whether we will need the
828 * pcbinfo lock or not. Do any work to decide what is needed up
829 * front before acquiring any locks.
830 */
831 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
832 if (control)
833 m_freem(control);
834 m_freem(m);
835 return (EMSGSIZE);
836 }
837
838 src.sin_family = 0;
839 if (control != NULL) {
840 /*
841 * XXX: Currently, we assume all the optional information is
842 * stored in a single mbuf.
843 */
844 if (control->m_next) {
845 m_freem(control);
846 m_freem(m);
847 return (EINVAL);
848 }
849 for (; control->m_len > 0;
850 control->m_data += CMSG_ALIGN(cm->cmsg_len),
851 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
852 cm = mtod(control, struct cmsghdr *);
853 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
854 || cm->cmsg_len > control->m_len) {
855 error = EINVAL;
856 break;
857 }
858 if (cm->cmsg_level != IPPROTO_IP)
859 continue;
860
861 switch (cm->cmsg_type) {
862 case IP_SENDSRCADDR:
863 if (cm->cmsg_len !=
864 CMSG_LEN(sizeof(struct in_addr))) {
865 error = EINVAL;
866 break;
867 }
868 bzero(&src, sizeof(src));
869 src.sin_family = AF_INET;
870 src.sin_len = sizeof(src);
871 src.sin_port = inp->inp_lport;
872 src.sin_addr =
873 *(struct in_addr *)CMSG_DATA(cm);
874 break;
875
876 default:
877 error = ENOPROTOOPT;
878 break;
879 }
880 if (error)
881 break;
882 }
883 m_freem(control);
884 }
885 if (error) {
886 m_freem(m);
887 return (error);
888 }
889
890 /*
891 * Depending on whether or not the application has bound or connected
892 * the socket, we may have to do varying levels of work. The optimal
893 * case is for a connected UDP socket, as a global lock isn't
894 * required at all.
895 *
896 * In order to decide which we need, we require stability of the
897 * inpcb binding, which we ensure by acquiring a read lock on the
898 * inpcb. This doesn't strictly follow the lock order, so we play
899 * the trylock and retry game; note that we may end up with more
900 * conservative locks than required the second time around, so later
901 * assertions have to accept that. Further analysis of the number of
902 * misses under contention is required.
903 */
904 sin = (struct sockaddr_in *)addr;
905 INP_RLOCK(inp);
906 if (sin != NULL &&
907 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0)) {
908 INP_RUNLOCK(inp);
909 INP_INFO_WLOCK(&udbinfo);
910 INP_WLOCK(inp);
911 unlock_udbinfo = 2;
912 } else if ((sin != NULL && (
913 (sin->sin_addr.s_addr == INADDR_ANY) ||
914 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
915 (inp->inp_laddr.s_addr == INADDR_ANY) ||
916 (inp->inp_lport == 0))) ||
917 (src.sin_family == AF_INET)) {
918 if (!INP_INFO_TRY_RLOCK(&udbinfo)) {
919 INP_RUNLOCK(inp);
920 INP_INFO_RLOCK(&udbinfo);
921 INP_RLOCK(inp);
922 }
923 unlock_udbinfo = 1;
924 } else
925 unlock_udbinfo = 0;
926
927 /*
928 * If the IP_SENDSRCADDR control message was specified, override the
929 * source address for this datagram. Its use is invalidated if the
930 * address thus specified is incomplete or clobbers other inpcbs.
931 */
932 laddr = inp->inp_laddr;
933 lport = inp->inp_lport;
934 if (src.sin_family == AF_INET) {
935 INP_INFO_LOCK_ASSERT(&udbinfo);
936 if ((lport == 0) ||
937 (laddr.s_addr == INADDR_ANY &&
938 src.sin_addr.s_addr == INADDR_ANY)) {
939 error = EINVAL;
940 goto release;
941 }
942 error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
943 &laddr.s_addr, &lport, td->td_ucred);
944 if (error)
945 goto release;
946 }
947
948 /*
949 * If a UDP socket has been connected, then a local address/port will
950 * have been selected and bound.
951 *
952 * If a UDP socket has not been connected to, then an explicit
953 * destination address must be used, in which case a local
954 * address/port may not have been selected and bound.
955 */
956 if (sin != NULL) {
957 INP_LOCK_ASSERT(inp);
958 if (inp->inp_faddr.s_addr != INADDR_ANY) {
959 error = EISCONN;
960 goto release;
961 }
962
963 /*
964 * Jail may rewrite the destination address, so let it do
965 * that before we use it.
966 */
967 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
968 if (error)
969 goto release;
970
971 /*
972 * If a local address or port hasn't yet been selected, or if
973 * the destination address needs to be rewritten due to using
974 * a special INADDR_ constant, invoke in_pcbconnect_setup()
975 * to do the heavy lifting. Once a port is selected, we
976 * commit the binding back to the socket; we also commit the
977 * binding of the address if in jail.
978 *
979 * If we already have a valid binding and we're not
980 * requesting a destination address rewrite, use a fast path.
981 */
982 if (inp->inp_laddr.s_addr == INADDR_ANY ||
983 inp->inp_lport == 0 ||
984 sin->sin_addr.s_addr == INADDR_ANY ||
985 sin->sin_addr.s_addr == INADDR_BROADCAST) {
986 INP_INFO_LOCK_ASSERT(&udbinfo);
987 error = in_pcbconnect_setup(inp, addr, &laddr.s_addr,
988 &lport, &faddr.s_addr, &fport, NULL,
989 td->td_ucred);
990 if (error)
991 goto release;
992
993 /*
994 * XXXRW: Why not commit the port if the address is
995 * !INADDR_ANY?
996 */
997 /* Commit the local port if newly assigned. */
998 if (inp->inp_laddr.s_addr == INADDR_ANY &&
999 inp->inp_lport == 0) {
1000 INP_INFO_WLOCK_ASSERT(&udbinfo);
1001 INP_WLOCK_ASSERT(inp);
1002 /*
1003 * Remember addr if jailed, to prevent
1004 * rebinding.
1005 */
1006 if (jailed(td->td_ucred))
1007 inp->inp_laddr = laddr;
1008 inp->inp_lport = lport;
1009 if (in_pcbinshash(inp) != 0) {
1010 inp->inp_lport = 0;
1011 error = EAGAIN;
1012 goto release;
1013 }
1014 inp->inp_flags |= INP_ANONPORT;
1015 }
1016 } else {
1017 faddr = sin->sin_addr;
1018 fport = sin->sin_port;
1019 }
1020 } else {
1021 INP_LOCK_ASSERT(inp);
1022 faddr = inp->inp_faddr;
1023 fport = inp->inp_fport;
1024 if (faddr.s_addr == INADDR_ANY) {
1025 error = ENOTCONN;
1026 goto release;
1027 }
1028 }
1029
1030 /*
1031 * Calculate data length and get a mbuf for UDP, IP, and possible
1032 * link-layer headers. Immediate slide the data pointer back forward
1033 * since we won't use that space at this layer.
1034 */
1035 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_DONTWAIT);
1036 if (m == NULL) {
1037 error = ENOBUFS;
1038 goto release;
1039 }
1040 m->m_data += max_linkhdr;
1041 m->m_len -= max_linkhdr;
1042 m->m_pkthdr.len -= max_linkhdr;
1043
1044 /*
1045 * Fill in mbuf with extended UDP header and addresses and length put
1046 * into network format.
1047 */
1048 ui = mtod(m, struct udpiphdr *);
1049 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1050 ui->ui_pr = IPPROTO_UDP;
1051 ui->ui_src = laddr;
1052 ui->ui_dst = faddr;
1053 ui->ui_sport = lport;
1054 ui->ui_dport = fport;
1055 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1056
1057 /*
1058 * Set the Don't Fragment bit in the IP header.
1059 */
1060 if (inp->inp_flags & INP_DONTFRAG) {
1061 struct ip *ip;
1062
1063 ip = (struct ip *)&ui->ui_i;
1064 ip->ip_off |= IP_DF;
1065 }
1066
1067 ipflags = 0;
1068 if (inp->inp_socket->so_options & SO_DONTROUTE)
1069 ipflags |= IP_ROUTETOIF;
1070 if (inp->inp_socket->so_options & SO_BROADCAST)
1071 ipflags |= IP_ALLOWBROADCAST;
1072 if (inp->inp_flags & INP_ONESBCAST)
1073 ipflags |= IP_SENDONES;
1074
1075 #ifdef MAC
1076 mac_create_mbuf_from_inpcb(inp, m);
1077 #endif
1078
1079 /*
1080 * Set up checksum and output datagram.
1081 */
1082 if (udp_cksum) {
1083 if (inp->inp_flags & INP_ONESBCAST)
1084 faddr.s_addr = INADDR_BROADCAST;
1085 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1086 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
1087 m->m_pkthdr.csum_flags = CSUM_UDP;
1088 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1089 } else
1090 ui->ui_sum = 0;
1091 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
1092 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1093 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
1094 udpstat.udps_opackets++;
1095
1096 if (unlock_udbinfo == 2)
1097 INP_INFO_WUNLOCK(&udbinfo);
1098 else if (unlock_udbinfo == 1)
1099 INP_INFO_RUNLOCK(&udbinfo);
1100 error = ip_output(m, inp->inp_options, NULL, ipflags,
1101 inp->inp_moptions, inp);
1102 if (unlock_udbinfo == 2)
1103 INP_WUNLOCK(inp);
1104 else
1105 INP_RUNLOCK(inp);
1106 return (error);
1107
1108 release:
1109 if (unlock_udbinfo == 2) {
1110 INP_WUNLOCK(inp);
1111 INP_INFO_WUNLOCK(&udbinfo);
1112 } else if (unlock_udbinfo == 1) {
1113 INP_RUNLOCK(inp);
1114 INP_INFO_RUNLOCK(&udbinfo);
1115 } else
1116 INP_RUNLOCK(inp);
1117 m_freem(m);
1118 return (error);
1119 }
1120
1121 static void
1122 udp_abort(struct socket *so)
1123 {
1124 struct inpcb *inp;
1125
1126 inp = sotoinpcb(so);
1127 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1128 INP_INFO_WLOCK(&udbinfo);
1129 INP_WLOCK(inp);
1130 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1131 in_pcbdisconnect(inp);
1132 inp->inp_laddr.s_addr = INADDR_ANY;
1133 soisdisconnected(so);
1134 }
1135 INP_WUNLOCK(inp);
1136 INP_INFO_WUNLOCK(&udbinfo);
1137 }
1138
1139 static int
1140 udp_attach(struct socket *so, int proto, struct thread *td)
1141 {
1142 struct inpcb *inp;
1143 int error;
1144
1145 inp = sotoinpcb(so);
1146 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1147 error = soreserve(so, udp_sendspace, udp_recvspace);
1148 if (error)
1149 return (error);
1150 INP_INFO_WLOCK(&udbinfo);
1151 error = in_pcballoc(so, &udbinfo);
1152 if (error) {
1153 INP_INFO_WUNLOCK(&udbinfo);
1154 return (error);
1155 }
1156
1157 inp = (struct inpcb *)so->so_pcb;
1158 inp->inp_vflag |= INP_IPV4;
1159 inp->inp_ip_ttl = ip_defttl;
1160
1161 error = udp_newudpcb(inp);
1162 if (error) {
1163 in_pcbdetach(inp);
1164 in_pcbfree(inp);
1165 INP_INFO_WUNLOCK(&udbinfo);
1166 return (error);
1167 }
1168
1169 INP_WUNLOCK(inp);
1170 INP_INFO_WUNLOCK(&udbinfo);
1171 return (0);
1172 }
1173
1174 static int
1175 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1176 {
1177 struct inpcb *inp;
1178 int error;
1179
1180 inp = sotoinpcb(so);
1181 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1182 INP_INFO_WLOCK(&udbinfo);
1183 INP_WLOCK(inp);
1184 error = in_pcbbind(inp, nam, td->td_ucred);
1185 INP_WUNLOCK(inp);
1186 INP_INFO_WUNLOCK(&udbinfo);
1187 return (error);
1188 }
1189
1190 static void
1191 udp_close(struct socket *so)
1192 {
1193 struct inpcb *inp;
1194
1195 inp = sotoinpcb(so);
1196 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1197 INP_INFO_WLOCK(&udbinfo);
1198 INP_WLOCK(inp);
1199 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1200 in_pcbdisconnect(inp);
1201 inp->inp_laddr.s_addr = INADDR_ANY;
1202 soisdisconnected(so);
1203 }
1204 INP_WUNLOCK(inp);
1205 INP_INFO_WUNLOCK(&udbinfo);
1206 }
1207
1208 static int
1209 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1210 {
1211 struct inpcb *inp;
1212 int error;
1213 struct sockaddr_in *sin;
1214
1215 inp = sotoinpcb(so);
1216 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1217 INP_INFO_WLOCK(&udbinfo);
1218 INP_WLOCK(inp);
1219 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1220 INP_WUNLOCK(inp);
1221 INP_INFO_WUNLOCK(&udbinfo);
1222 return (EISCONN);
1223 }
1224 sin = (struct sockaddr_in *)nam;
1225 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1226 if (error != 0) {
1227 INP_WUNLOCK(inp);
1228 INP_INFO_WUNLOCK(&udbinfo);
1229 return (error);
1230 }
1231 error = in_pcbconnect(inp, nam, td->td_ucred);
1232 if (error == 0)
1233 soisconnected(so);
1234 INP_WUNLOCK(inp);
1235 INP_INFO_WUNLOCK(&udbinfo);
1236 return (error);
1237 }
1238
1239 static void
1240 udp_detach(struct socket *so)
1241 {
1242 struct inpcb *inp;
1243 struct udpcb *up;
1244
1245 inp = sotoinpcb(so);
1246 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1247 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1248 ("udp_detach: not disconnected"));
1249 INP_INFO_WLOCK(&udbinfo);
1250 INP_WLOCK(inp);
1251 up = intoudpcb(inp);
1252 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1253 inp->inp_ppcb = NULL;
1254 in_pcbdetach(inp);
1255 in_pcbfree(inp);
1256 INP_INFO_WUNLOCK(&udbinfo);
1257 udp_discardcb(up);
1258 }
1259
1260 static int
1261 udp_disconnect(struct socket *so)
1262 {
1263 struct inpcb *inp;
1264
1265 inp = sotoinpcb(so);
1266 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1267 INP_INFO_WLOCK(&udbinfo);
1268 INP_WLOCK(inp);
1269 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1270 INP_WUNLOCK(inp);
1271 INP_INFO_WUNLOCK(&udbinfo);
1272 return (ENOTCONN);
1273 }
1274
1275 in_pcbdisconnect(inp);
1276 inp->inp_laddr.s_addr = INADDR_ANY;
1277 SOCK_LOCK(so);
1278 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1279 SOCK_UNLOCK(so);
1280 INP_WUNLOCK(inp);
1281 INP_INFO_WUNLOCK(&udbinfo);
1282 return (0);
1283 }
1284
1285 static int
1286 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1287 struct mbuf *control, struct thread *td)
1288 {
1289 struct inpcb *inp;
1290
1291 inp = sotoinpcb(so);
1292 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1293 return (udp_output(inp, m, addr, control, td));
1294 }
1295
1296 int
1297 udp_shutdown(struct socket *so)
1298 {
1299 struct inpcb *inp;
1300
1301 inp = sotoinpcb(so);
1302 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1303 INP_WLOCK(inp);
1304 socantsendmore(so);
1305 INP_WUNLOCK(inp);
1306 return (0);
1307 }
1308
1309 struct pr_usrreqs udp_usrreqs = {
1310 .pru_abort = udp_abort,
1311 .pru_attach = udp_attach,
1312 .pru_bind = udp_bind,
1313 .pru_connect = udp_connect,
1314 .pru_control = in_control,
1315 .pru_detach = udp_detach,
1316 .pru_disconnect = udp_disconnect,
1317 .pru_peeraddr = in_getpeeraddr,
1318 .pru_send = udp_send,
1319 .pru_sosend = sosend_dgram,
1320 .pru_shutdown = udp_shutdown,
1321 .pru_sockaddr = in_getsockaddr,
1322 .pru_sosetlabel = in_pcbsosetlabel,
1323 .pru_close = udp_close,
1324 };
Cache object: a20b445ad9b054ffda7592a516f340f1
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