1 /*
2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved.
3 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
4 *
5 * This code is derived from software contributed to The DragonFly Project
6 * by Jeffrey M. Hsu.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The DragonFly Project nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific, prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
36 * The Regents of the University of California. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 *
62 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
63 * $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.64.2.18 2003/01/24 05:11:34 sam Exp $
64 */
65
66 #include "opt_ipsec.h"
67 #include "opt_inet6.h"
68
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/kernel.h>
72 #include <sys/malloc.h>
73 #include <sys/mbuf.h>
74 #include <sys/domain.h>
75 #include <sys/proc.h>
76 #include <sys/priv.h>
77 #include <sys/protosw.h>
78 #include <sys/socket.h>
79 #include <sys/socketvar.h>
80 #include <sys/sysctl.h>
81 #include <sys/syslog.h>
82 #include <sys/in_cksum.h>
83
84 #include <sys/thread2.h>
85 #include <sys/socketvar2.h>
86 #include <sys/serialize.h>
87
88 #include <machine/stdarg.h>
89
90 #include <net/if.h>
91 #include <net/route.h>
92 #include <net/netmsg2.h>
93 #include <net/netisr2.h>
94
95 #include <netinet/in.h>
96 #include <netinet/in_systm.h>
97 #include <netinet/ip.h>
98 #ifdef INET6
99 #include <netinet/ip6.h>
100 #endif
101 #include <netinet/in_pcb.h>
102 #include <netinet/in_var.h>
103 #include <netinet/ip_var.h>
104 #ifdef INET6
105 #include <netinet6/ip6_var.h>
106 #endif
107 #include <netinet/ip_icmp.h>
108 #include <netinet/icmp_var.h>
109 #include <netinet/udp.h>
110 #include <netinet/udp_var.h>
111
112 #ifdef FAST_IPSEC
113 #include <netproto/ipsec/ipsec.h>
114 #endif
115
116 #ifdef IPSEC
117 #include <netinet6/ipsec.h>
118 #endif
119
120 /*
121 * UDP protocol implementation.
122 * Per RFC 768, August, 1980.
123 */
124 #ifndef COMPAT_42
125 static int udpcksum = 1;
126 #else
127 static int udpcksum = 0; /* XXX */
128 #endif
129 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
130 &udpcksum, 0, "Enable checksumming of UDP packets");
131
132 int log_in_vain = 0;
133 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
134 &log_in_vain, 0, "Log all incoming UDP packets");
135
136 static int blackhole = 0;
137 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
138 &blackhole, 0, "Do not send port unreachables for refused connects");
139
140 static int strict_mcast_mship = 1;
141 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW,
142 &strict_mcast_mship, 0, "Only send multicast to member sockets");
143
144 int udp_sosend_async = 1;
145 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_async, CTLFLAG_RW,
146 &udp_sosend_async, 0, "UDP asynchronized pru_send");
147
148 int udp_sosend_prepend = 1;
149 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_prepend, CTLFLAG_RW,
150 &udp_sosend_prepend, 0,
151 "Prepend enough space for proto and link header in pru_send");
152
153 static int udp_reuseport_ext = 1;
154 SYSCTL_INT(_net_inet_udp, OID_AUTO, reuseport_ext, CTLFLAG_RW,
155 &udp_reuseport_ext, 0, "SO_REUSEPORT extension");
156
157 struct inpcbinfo udbinfo;
158
159 static struct netisr_barrier *udbinfo_br;
160 static struct lwkt_serialize udbinfo_slize = LWKT_SERIALIZE_INITIALIZER;
161
162 #ifndef UDBHASHSIZE
163 #define UDBHASHSIZE 16
164 #endif
165
166 struct udpstat udpstat_percpu[MAXCPU] __cachealign;
167
168 #ifdef INET6
169 struct udp_in6 {
170 struct sockaddr_in6 uin6_sin;
171 u_char uin6_init_done : 1;
172 };
173 struct udp_ip6 {
174 struct ip6_hdr uip6_ip6;
175 u_char uip6_init_done : 1;
176 };
177 #else
178 struct udp_in6;
179 struct udp_ip6;
180 #endif /* INET6 */
181
182 static void udp_append (struct inpcb *last, struct ip *ip,
183 struct mbuf *n, int off, struct sockaddr_in *udp_in,
184 struct udp_in6 *, struct udp_ip6 *);
185 #ifdef INET6
186 static void ip_2_ip6_hdr (struct ip6_hdr *ip6, struct ip *ip);
187 #endif
188
189 static int udp_connect_oncpu(struct socket *so, struct thread *td,
190 struct sockaddr_in *sin, struct sockaddr_in *if_sin);
191 static int udp_output (struct inpcb *, struct mbuf *, struct sockaddr *,
192 struct thread *, int, boolean_t);
193
194 void
195 udp_init(void)
196 {
197 int cpu;
198
199 in_pcbinfo_init(&udbinfo);
200 udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
201 udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB,
202 &udbinfo.porthashmask);
203 udbinfo.wildcardhashbase = hashinit(UDBHASHSIZE, M_PCB,
204 &udbinfo.wildcardhashmask);
205 udbinfo.localgrphashbase = hashinit(UDBHASHSIZE, M_PCB,
206 &udbinfo.localgrphashmask);
207 udbinfo.ipi_size = sizeof(struct inpcb);
208
209 udbinfo_br = netisr_barrier_create();
210
211 /*
212 * Initialize UDP statistics counters for each CPU.
213 */
214 for (cpu = 0; cpu < ncpus; ++cpu)
215 bzero(&udpstat_percpu[cpu], sizeof(struct udpstat));
216 }
217
218 static int
219 sysctl_udpstat(SYSCTL_HANDLER_ARGS)
220 {
221 int cpu, error = 0;
222
223 for (cpu = 0; cpu < ncpus; ++cpu) {
224 if ((error = SYSCTL_OUT(req, &udpstat_percpu[cpu],
225 sizeof(struct udpstat))))
226 break;
227 if ((error = SYSCTL_IN(req, &udpstat_percpu[cpu],
228 sizeof(struct udpstat))))
229 break;
230 }
231
232 return (error);
233 }
234 SYSCTL_PROC(_net_inet_udp, UDPCTL_STATS, stats, (CTLTYPE_OPAQUE | CTLFLAG_RW),
235 0, 0, sysctl_udpstat, "S,udpstat", "UDP statistics");
236
237 /*
238 * Check multicast packets to make sure they are only sent to sockets with
239 * multicast memberships for the packet's destination address and arrival
240 * interface. Multicast packets to multicast-unaware sockets are also
241 * disallowed.
242 *
243 * Returns 0 if the packet is acceptable, -1 if it is not.
244 */
245 static __inline int
246 check_multicast_membership(struct ip *ip, struct inpcb *inp, struct mbuf *m)
247 {
248 int mshipno;
249 struct ip_moptions *mopt;
250
251 if (strict_mcast_mship == 0 ||
252 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
253 return (0);
254 }
255 mopt = inp->inp_moptions;
256 if (mopt == NULL)
257 return (-1);
258 for (mshipno = 0; mshipno < mopt->imo_num_memberships; ++mshipno) {
259 struct in_multi *maddr = mopt->imo_membership[mshipno];
260
261 if (ip->ip_dst.s_addr == maddr->inm_addr.s_addr &&
262 m->m_pkthdr.rcvif == maddr->inm_ifp) {
263 return (0);
264 }
265 }
266 return (-1);
267 }
268
269 int
270 udp_input(struct mbuf **mp, int *offp, int proto)
271 {
272 struct sockaddr_in udp_in = { sizeof udp_in, AF_INET };
273 #ifdef INET6
274 struct udp_in6 udp_in6 = {
275 { sizeof udp_in6.uin6_sin, AF_INET6 }, 0
276 };
277 struct udp_ip6 udp_ip6;
278 #endif
279
280 int iphlen;
281 struct ip *ip;
282 struct udphdr *uh;
283 struct inpcb *inp;
284 struct mbuf *m;
285 struct mbuf *opts = NULL;
286 int len, off;
287 struct ip save_ip;
288 struct sockaddr *append_sa;
289
290 off = *offp;
291 m = *mp;
292 *mp = NULL;
293
294 iphlen = off;
295 udp_stat.udps_ipackets++;
296
297 /*
298 * Strip IP options, if any; should skip this,
299 * make available to user, and use on returned packets,
300 * but we don't yet have a way to check the checksum
301 * with options still present.
302 */
303 if (iphlen > sizeof(struct ip)) {
304 ip_stripoptions(m);
305 iphlen = sizeof(struct ip);
306 }
307
308 /*
309 * IP and UDP headers are together in first mbuf.
310 * Already checked and pulled up in ip_demux().
311 */
312 KASSERT(m->m_len >= iphlen + sizeof(struct udphdr),
313 ("UDP header not in one mbuf"));
314
315 ip = mtod(m, struct ip *);
316 uh = (struct udphdr *)((caddr_t)ip + iphlen);
317
318 /* destination port of 0 is illegal, based on RFC768. */
319 if (uh->uh_dport == 0)
320 goto bad;
321
322 /*
323 * Make mbuf data length reflect UDP length.
324 * If not enough data to reflect UDP length, drop.
325 */
326 len = ntohs((u_short)uh->uh_ulen);
327 if (ip->ip_len != len) {
328 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
329 udp_stat.udps_badlen++;
330 goto bad;
331 }
332 m_adj(m, len - ip->ip_len);
333 /* ip->ip_len = len; */
334 }
335 /*
336 * Save a copy of the IP header in case we want restore it
337 * for sending an ICMP error message in response.
338 */
339 save_ip = *ip;
340
341 /*
342 * Checksum extended UDP header and data.
343 */
344 if (uh->uh_sum) {
345 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
346 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
347 uh->uh_sum = m->m_pkthdr.csum_data;
348 else
349 uh->uh_sum = in_pseudo(ip->ip_src.s_addr,
350 ip->ip_dst.s_addr, htonl((u_short)len +
351 m->m_pkthdr.csum_data + IPPROTO_UDP));
352 uh->uh_sum ^= 0xffff;
353 } else {
354 char b[9];
355
356 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
357 bzero(((struct ipovly *)ip)->ih_x1, 9);
358 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
359 uh->uh_sum = in_cksum(m, len + sizeof(struct ip));
360 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
361 }
362 if (uh->uh_sum) {
363 udp_stat.udps_badsum++;
364 m_freem(m);
365 return(IPPROTO_DONE);
366 }
367 } else
368 udp_stat.udps_nosum++;
369
370 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
371 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
372 struct inpcb *last;
373
374 /*
375 * Deliver a multicast or broadcast datagram to *all* sockets
376 * for which the local and remote addresses and ports match
377 * those of the incoming datagram. This allows more than
378 * one process to receive multi/broadcasts on the same port.
379 * (This really ought to be done for unicast datagrams as
380 * well, but that would cause problems with existing
381 * applications that open both address-specific sockets and
382 * a wildcard socket listening to the same port -- they would
383 * end up receiving duplicates of every unicast datagram.
384 * Those applications open the multiple sockets to overcome an
385 * inadequacy of the UDP socket interface, but for backwards
386 * compatibility we avoid the problem here rather than
387 * fixing the interface. Maybe 4.5BSD will remedy this?)
388 */
389
390 /*
391 * Construct sockaddr format source address.
392 */
393 udp_in.sin_port = uh->uh_sport;
394 udp_in.sin_addr = ip->ip_src;
395 /*
396 * Locate pcb(s) for datagram.
397 * (Algorithm copied from raw_intr().)
398 */
399 last = NULL;
400 #ifdef INET6
401 udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0;
402 #endif
403 LIST_FOREACH(inp, &udbinfo.pcblisthead, inp_list) {
404 KKASSERT((inp->inp_flags & INP_PLACEMARKER) == 0);
405 #ifdef INET6
406 if (!(inp->inp_vflag & INP_IPV4))
407 continue;
408 #endif
409 if (inp->inp_lport != uh->uh_dport)
410 continue;
411 if (inp->inp_laddr.s_addr != INADDR_ANY) {
412 if (inp->inp_laddr.s_addr !=
413 ip->ip_dst.s_addr)
414 continue;
415 }
416 if (inp->inp_faddr.s_addr != INADDR_ANY) {
417 if (inp->inp_faddr.s_addr !=
418 ip->ip_src.s_addr ||
419 inp->inp_fport != uh->uh_sport)
420 continue;
421 }
422
423 if (check_multicast_membership(ip, inp, m) < 0)
424 continue;
425
426 if (last != NULL) {
427 struct mbuf *n;
428
429 #ifdef IPSEC
430 /* check AH/ESP integrity. */
431 if (ipsec4_in_reject_so(m, last->inp_socket))
432 ipsecstat.in_polvio++;
433 /* do not inject data to pcb */
434 else
435 #endif /*IPSEC*/
436 #ifdef FAST_IPSEC
437 /* check AH/ESP integrity. */
438 if (ipsec4_in_reject(m, last))
439 ;
440 else
441 #endif /*FAST_IPSEC*/
442 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL)
443 udp_append(last, ip, n,
444 iphlen + sizeof(struct udphdr),
445 &udp_in,
446 #ifdef INET6
447 &udp_in6, &udp_ip6
448 #else
449 NULL, NULL
450 #endif
451 );
452 }
453 last = inp;
454 /*
455 * Don't look for additional matches if this one does
456 * not have either the SO_REUSEPORT or SO_REUSEADDR
457 * socket options set. This heuristic avoids searching
458 * through all pcbs in the common case of a non-shared
459 * port. It * assumes that an application will never
460 * clear these options after setting them.
461 */
462 if (!(last->inp_socket->so_options &
463 (SO_REUSEPORT | SO_REUSEADDR)))
464 break;
465 }
466
467 if (last == NULL) {
468 /*
469 * No matching pcb found; discard datagram.
470 * (No need to send an ICMP Port Unreachable
471 * for a broadcast or multicast datgram.)
472 */
473 udp_stat.udps_noportbcast++;
474 goto bad;
475 }
476 #ifdef IPSEC
477 /* check AH/ESP integrity. */
478 if (ipsec4_in_reject_so(m, last->inp_socket)) {
479 ipsecstat.in_polvio++;
480 goto bad;
481 }
482 #endif /*IPSEC*/
483 #ifdef FAST_IPSEC
484 /* check AH/ESP integrity. */
485 if (ipsec4_in_reject(m, last))
486 goto bad;
487 #endif /*FAST_IPSEC*/
488 udp_append(last, ip, m, iphlen + sizeof(struct udphdr),
489 &udp_in,
490 #ifdef INET6
491 &udp_in6, &udp_ip6
492 #else
493 NULL, NULL
494 #endif
495 );
496 return(IPPROTO_DONE);
497 }
498 /*
499 * Locate pcb for datagram.
500 */
501 inp = in_pcblookup_pkthash(&udbinfo, ip->ip_src, uh->uh_sport,
502 ip->ip_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif,
503 udp_reuseport_ext ? m : NULL);
504 if (inp == NULL) {
505 if (log_in_vain) {
506 char buf[sizeof "aaa.bbb.ccc.ddd"];
507
508 strcpy(buf, inet_ntoa(ip->ip_dst));
509 log(LOG_INFO,
510 "Connection attempt to UDP %s:%d from %s:%d\n",
511 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
512 ntohs(uh->uh_sport));
513 }
514 udp_stat.udps_noport++;
515 if (m->m_flags & (M_BCAST | M_MCAST)) {
516 udp_stat.udps_noportbcast++;
517 goto bad;
518 }
519 if (blackhole)
520 goto bad;
521 #ifdef ICMP_BANDLIM
522 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
523 goto bad;
524 #endif
525 *ip = save_ip;
526 ip->ip_len += iphlen;
527 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
528 return(IPPROTO_DONE);
529 }
530 #ifdef IPSEC
531 if (ipsec4_in_reject_so(m, inp->inp_socket)) {
532 ipsecstat.in_polvio++;
533 goto bad;
534 }
535 #endif /*IPSEC*/
536 #ifdef FAST_IPSEC
537 if (ipsec4_in_reject(m, inp))
538 goto bad;
539 #endif /*FAST_IPSEC*/
540 /*
541 * Check the minimum TTL for socket.
542 */
543 if (ip->ip_ttl < inp->inp_ip_minttl)
544 goto bad;
545
546 /*
547 * Construct sockaddr format source address.
548 * Stuff source address and datagram in user buffer.
549 */
550 udp_in.sin_port = uh->uh_sport;
551 udp_in.sin_addr = ip->ip_src;
552 if ((inp->inp_flags & INP_CONTROLOPTS) ||
553 (inp->inp_socket->so_options & SO_TIMESTAMP)) {
554 #ifdef INET6
555 if (inp->inp_vflag & INP_IPV6) {
556 int savedflags;
557
558 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
559 savedflags = inp->inp_flags;
560 inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
561 ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m);
562 inp->inp_flags = savedflags;
563 } else
564 #endif
565 ip_savecontrol(inp, &opts, ip, m);
566 }
567 m_adj(m, iphlen + sizeof(struct udphdr));
568 #ifdef INET6
569 if (inp->inp_vflag & INP_IPV6) {
570 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
571 append_sa = (struct sockaddr *)&udp_in6;
572 } else
573 #endif
574 append_sa = (struct sockaddr *)&udp_in;
575
576 lwkt_gettoken(&inp->inp_socket->so_rcv.ssb_token);
577 if (ssb_appendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) {
578 udp_stat.udps_fullsock++;
579 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
580 goto bad;
581 }
582 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
583 sorwakeup(inp->inp_socket);
584 return(IPPROTO_DONE);
585 bad:
586 m_freem(m);
587 if (opts)
588 m_freem(opts);
589 return(IPPROTO_DONE);
590 }
591
592 #ifdef INET6
593 static void
594 ip_2_ip6_hdr(struct ip6_hdr *ip6, struct ip *ip)
595 {
596 bzero(ip6, sizeof *ip6);
597
598 ip6->ip6_vfc = IPV6_VERSION;
599 ip6->ip6_plen = ip->ip_len;
600 ip6->ip6_nxt = ip->ip_p;
601 ip6->ip6_hlim = ip->ip_ttl;
602 ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] =
603 IPV6_ADDR_INT32_SMP;
604 ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr;
605 ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr;
606 }
607 #endif
608
609 /*
610 * subroutine of udp_input(), mainly for source code readability.
611 * caller must properly init udp_ip6 and udp_in6 beforehand.
612 */
613 static void
614 udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n, int off,
615 struct sockaddr_in *udp_in,
616 struct udp_in6 *udp_in6, struct udp_ip6 *udp_ip6)
617 {
618 struct sockaddr *append_sa;
619 struct mbuf *opts = NULL;
620
621 if (last->inp_flags & INP_CONTROLOPTS ||
622 last->inp_socket->so_options & SO_TIMESTAMP) {
623 #ifdef INET6
624 if (last->inp_vflag & INP_IPV6) {
625 int savedflags;
626
627 if (udp_ip6->uip6_init_done == 0) {
628 ip_2_ip6_hdr(&udp_ip6->uip6_ip6, ip);
629 udp_ip6->uip6_init_done = 1;
630 }
631 savedflags = last->inp_flags;
632 last->inp_flags &= ~INP_UNMAPPABLEOPTS;
633 ip6_savecontrol(last, &opts, &udp_ip6->uip6_ip6, n);
634 last->inp_flags = savedflags;
635 } else
636 #endif
637 ip_savecontrol(last, &opts, ip, n);
638 }
639 #ifdef INET6
640 if (last->inp_vflag & INP_IPV6) {
641 if (udp_in6->uin6_init_done == 0) {
642 in6_sin_2_v4mapsin6(udp_in, &udp_in6->uin6_sin);
643 udp_in6->uin6_init_done = 1;
644 }
645 append_sa = (struct sockaddr *)&udp_in6->uin6_sin;
646 } else
647 #endif
648 append_sa = (struct sockaddr *)udp_in;
649 m_adj(n, off);
650 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
651 if (ssb_appendaddr(&last->inp_socket->so_rcv, append_sa, n, opts) == 0) {
652 m_freem(n);
653 if (opts)
654 m_freem(opts);
655 udp_stat.udps_fullsock++;
656 } else {
657 sorwakeup(last->inp_socket);
658 }
659 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
660 }
661
662 /*
663 * Notify a udp user of an asynchronous error;
664 * just wake up so that he can collect error status.
665 */
666 void
667 udp_notify(struct inpcb *inp, int error)
668 {
669 inp->inp_socket->so_error = error;
670 sorwakeup(inp->inp_socket);
671 sowwakeup(inp->inp_socket);
672 }
673
674 struct netmsg_udp_notify {
675 struct netmsg_base base;
676 void (*nm_notify)(struct inpcb *, int);
677 struct in_addr nm_faddr;
678 int nm_arg;
679 };
680
681 static void
682 udp_notifyall_oncpu(netmsg_t msg)
683 {
684 struct netmsg_udp_notify *nm = (struct netmsg_udp_notify *)msg;
685 #if 0
686 int nextcpu;
687 #endif
688
689 in_pcbnotifyall(&udbinfo.pcblisthead, nm->nm_faddr,
690 nm->nm_arg, nm->nm_notify);
691 lwkt_replymsg(&nm->base.lmsg, 0);
692
693 #if 0
694 /* XXX currently udp only runs on cpu 0 */
695 nextcpu = mycpuid + 1;
696 if (nextcpu < ncpus2)
697 lwkt_forwardmsg(netisr_cpuport(nextcpu), &nm->base.lmsg);
698 else
699 lwkt_replymsg(&nmsg->base.lmsg, 0);
700 #endif
701 }
702
703 static void
704 udp_rtchange(struct inpcb *inp, int err)
705 {
706 /* XXX Nuke this, once UDP inpcbs are CPU localized */
707 if (inp->inp_route.ro_rt && inp->inp_route.ro_rt->rt_cpuid == mycpuid) {
708 rtfree(inp->inp_route.ro_rt);
709 inp->inp_route.ro_rt = NULL;
710 /*
711 * A new route can be allocated the next time
712 * output is attempted.
713 */
714 }
715 }
716
717 void
718 udp_ctlinput(netmsg_t msg)
719 {
720 struct sockaddr *sa = msg->ctlinput.nm_arg;
721 struct ip *ip = msg->ctlinput.nm_extra;
722 int cmd = msg->ctlinput.nm_cmd;
723 struct udphdr *uh;
724 void (*notify) (struct inpcb *, int) = udp_notify;
725 struct in_addr faddr;
726 struct inpcb *inp;
727
728 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
729
730 faddr = ((struct sockaddr_in *)sa)->sin_addr;
731 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
732 goto done;
733
734 if (PRC_IS_REDIRECT(cmd)) {
735 ip = NULL;
736 notify = udp_rtchange;
737 } else if (cmd == PRC_HOSTDEAD) {
738 ip = NULL;
739 } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) {
740 goto done;
741 }
742
743 if (ip) {
744 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
745 inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport,
746 ip->ip_src, uh->uh_sport, 0, NULL);
747 if (inp != NULL && inp->inp_socket != NULL)
748 (*notify)(inp, inetctlerrmap[cmd]);
749 } else if (PRC_IS_REDIRECT(cmd)) {
750 struct netmsg_udp_notify *nm;
751
752 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
753 nm = kmalloc(sizeof(*nm), M_LWKTMSG, M_INTWAIT);
754 netmsg_init(&nm->base, NULL, &netisr_afree_rport,
755 0, udp_notifyall_oncpu);
756 nm->nm_faddr = faddr;
757 nm->nm_arg = inetctlerrmap[cmd];
758 nm->nm_notify = notify;
759 lwkt_sendmsg(netisr_cpuport(0), &nm->base.lmsg);
760 } else {
761 /*
762 * XXX We should forward msg upon PRC_HOSTHEAD and ip == NULL,
763 * once UDP inpcbs are CPU localized
764 */
765 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
766 in_pcbnotifyall(&udbinfo.pcblisthead, faddr, inetctlerrmap[cmd],
767 notify);
768 }
769 done:
770 lwkt_replymsg(&msg->lmsg, 0);
771 }
772
773 static int
774 udp_pcblist(SYSCTL_HANDLER_ARGS)
775 {
776 struct xinpcb *xi;
777 int error, nxi, i;
778
779 udbinfo_lock();
780 error = in_pcblist_global_nomarker(oidp, arg1, arg2, req, &xi, &nxi);
781 udbinfo_unlock();
782
783 if (error) {
784 KKASSERT(xi == NULL);
785 return error;
786 }
787 if (nxi == 0) {
788 KKASSERT(xi == NULL);
789 return 0;
790 }
791
792 for (i = 0; i < nxi; ++i) {
793 error = SYSCTL_OUT(req, &xi[i], sizeof(xi[i]));
794 if (error)
795 break;
796 }
797 kfree(xi, M_TEMP);
798
799 return error;
800 }
801 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, &udbinfo, 0,
802 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
803
804 static int
805 udp_getcred(SYSCTL_HANDLER_ARGS)
806 {
807 struct sockaddr_in addrs[2];
808 struct ucred cred0, *cred = NULL;
809 struct inpcb *inp;
810 int error;
811
812 error = priv_check(req->td, PRIV_ROOT);
813 if (error)
814 return (error);
815 error = SYSCTL_IN(req, addrs, sizeof addrs);
816 if (error)
817 return (error);
818
819 udbinfo_lock();
820 inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
821 addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
822 if (inp == NULL || inp->inp_socket == NULL) {
823 error = ENOENT;
824 } else {
825 if (inp->inp_socket->so_cred != NULL) {
826 cred0 = *(inp->inp_socket->so_cred);
827 cred = &cred0;
828 }
829 }
830 udbinfo_unlock();
831
832 if (error)
833 return error;
834
835 return SYSCTL_OUT(req, cred, sizeof(struct ucred));
836 }
837
838 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
839 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
840
841 static int
842 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *dstaddr,
843 struct thread *td, int flags, boolean_t held_td)
844 {
845 struct udpiphdr *ui;
846 int len = m->m_pkthdr.len;
847 struct sockaddr_in *sin; /* really is initialized before use */
848 int error = 0, lport_any = 0;
849
850 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
851 error = EMSGSIZE;
852 goto release;
853 }
854
855 if (inp->inp_lport == 0) { /* unbound socket */
856 error = in_pcbbind(inp, NULL, td);
857 if (error)
858 goto release;
859
860 udbinfo_barrier_set();
861 in_pcbinswildcardhash(inp);
862 udbinfo_barrier_rem();
863 lport_any = 1;
864 }
865
866 if (dstaddr != NULL) { /* destination address specified */
867 if (inp->inp_faddr.s_addr != INADDR_ANY) {
868 /* already connected */
869 error = EISCONN;
870 goto release;
871 }
872 sin = (struct sockaddr_in *)dstaddr;
873 if (!prison_remote_ip(td, (struct sockaddr *)&sin)) {
874 error = EAFNOSUPPORT; /* IPv6 only jail */
875 goto release;
876 }
877 } else {
878 if (inp->inp_faddr.s_addr == INADDR_ANY) {
879 /* no destination specified and not already connected */
880 error = ENOTCONN;
881 goto release;
882 }
883 sin = NULL;
884 }
885
886 /*
887 * Calculate data length and get a mbuf
888 * for UDP and IP headers.
889 */
890 M_PREPEND(m, sizeof(struct udpiphdr), MB_DONTWAIT);
891 if (m == NULL) {
892 error = ENOBUFS;
893 goto release;
894 }
895
896 /*
897 * Fill in mbuf with extended UDP header
898 * and addresses and length put into network format.
899 */
900 ui = mtod(m, struct udpiphdr *);
901 bzero(ui->ui_x1, sizeof ui->ui_x1); /* XXX still needed? */
902 ui->ui_pr = IPPROTO_UDP;
903
904 /*
905 * Set destination address.
906 */
907 if (dstaddr != NULL) { /* use specified destination */
908 ui->ui_dst = sin->sin_addr;
909 ui->ui_dport = sin->sin_port;
910 } else { /* use connected destination */
911 ui->ui_dst = inp->inp_faddr;
912 ui->ui_dport = inp->inp_fport;
913 }
914
915 /*
916 * Set source address.
917 */
918 if (inp->inp_laddr.s_addr == INADDR_ANY ||
919 IN_MULTICAST(ntohl(inp->inp_laddr.s_addr))) {
920 struct sockaddr_in *if_sin;
921
922 if (dstaddr == NULL) {
923 /*
924 * connect() had (or should have) failed because
925 * the interface had no IP address, but the
926 * application proceeded to call send() anyways.
927 */
928 error = ENOTCONN;
929 goto release;
930 }
931
932 /* Look up outgoing interface. */
933 error = in_pcbladdr_find(inp, dstaddr, &if_sin, td, 1);
934 if (error)
935 goto release;
936 ui->ui_src = if_sin->sin_addr; /* use address of interface */
937 } else {
938 ui->ui_src = inp->inp_laddr; /* use non-null bound address */
939 }
940 ui->ui_sport = inp->inp_lport;
941 KASSERT(inp->inp_lport != 0, ("inp lport should have been bound"));
942
943 /*
944 * Release the original thread, since it is no longer used
945 */
946 if (held_td) {
947 lwkt_rele(td);
948 held_td = FALSE;
949 }
950
951 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
952
953 /*
954 * Set up checksum and output datagram.
955 */
956 if (udpcksum) {
957 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
958 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
959 m->m_pkthdr.csum_flags = CSUM_UDP;
960 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
961 m->m_pkthdr.csum_thlen = sizeof(struct udphdr);
962 } else {
963 ui->ui_sum = 0;
964 }
965 ((struct ip *)ui)->ip_len = sizeof(struct udpiphdr) + len;
966 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
967 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
968 udp_stat.udps_opackets++;
969
970 error = ip_output(m, inp->inp_options, &inp->inp_route,
971 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)) |
972 flags | IP_DEBUGROUTE,
973 inp->inp_moptions, inp);
974
975 /*
976 * If this is the first data gram sent on an unbound and unconnected
977 * UDP socket, lport will be changed in this function. If target
978 * CPU after this lport changing is no longer the current CPU, then
979 * free the route entry allocated on the current CPU.
980 */
981 if (lport_any) {
982 if (udp_addrcpu(inp->inp_faddr.s_addr, inp->inp_fport,
983 inp->inp_laddr.s_addr, inp->inp_lport) != mycpuid) {
984 #ifdef notyet
985 struct route *ro = &inp->inp_route;
986
987 if (ro->ro_rt != NULL)
988 RTFREE(ro->ro_rt);
989 bzero(ro, sizeof(*ro));
990 #else
991 panic("UDP activity should only be in netisr0");
992 #endif
993 }
994 }
995 return (error);
996
997 release:
998 if (held_td)
999 lwkt_rele(td);
1000 m_freem(m);
1001 return (error);
1002 }
1003
1004 u_long udp_sendspace = 9216; /* really max datagram size */
1005 /* 40 1K datagrams */
1006 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
1007 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
1008
1009 u_long udp_recvspace = 40 * (1024 +
1010 #ifdef INET6
1011 sizeof(struct sockaddr_in6)
1012 #else
1013 sizeof(struct sockaddr_in)
1014 #endif
1015 );
1016 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
1017 &udp_recvspace, 0, "Maximum incoming UDP datagram size");
1018
1019 /*
1020 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
1021 * will sofree() it when we return.
1022 */
1023 static void
1024 udp_abort(netmsg_t msg)
1025 {
1026 struct socket *so = msg->abort.base.nm_so;
1027 struct inpcb *inp;
1028 int error;
1029
1030 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1031
1032 inp = so->so_pcb;
1033 if (inp) {
1034 soisdisconnected(so);
1035
1036 udbinfo_barrier_set();
1037 in_pcbdetach(inp);
1038 udbinfo_barrier_rem();
1039 error = 0;
1040 } else {
1041 error = EINVAL;
1042 }
1043 lwkt_replymsg(&msg->abort.base.lmsg, error);
1044 }
1045
1046 static void
1047 udp_attach(netmsg_t msg)
1048 {
1049 struct socket *so = msg->attach.base.nm_so;
1050 struct pru_attach_info *ai = msg->attach.nm_ai;
1051 struct inpcb *inp;
1052 int error;
1053
1054 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1055
1056 inp = so->so_pcb;
1057 if (inp != NULL) {
1058 error = EINVAL;
1059 goto out;
1060 }
1061 error = soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit);
1062 if (error)
1063 goto out;
1064
1065 udbinfo_barrier_set();
1066 error = in_pcballoc(so, &udbinfo);
1067 udbinfo_barrier_rem();
1068
1069 if (error)
1070 goto out;
1071
1072 /*
1073 * Set default port for protocol processing prior to bind/connect.
1074 */
1075 sosetport(so, netisr_cpuport(0));
1076
1077 inp = (struct inpcb *)so->so_pcb;
1078 inp->inp_vflag |= INP_IPV4;
1079 inp->inp_ip_ttl = ip_defttl;
1080 error = 0;
1081 out:
1082 lwkt_replymsg(&msg->attach.base.lmsg, error);
1083 }
1084
1085 static void
1086 udp_bind(netmsg_t msg)
1087 {
1088 struct socket *so = msg->bind.base.nm_so;
1089 struct sockaddr *nam = msg->bind.nm_nam;
1090 struct thread *td = msg->bind.nm_td;
1091 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1092 struct inpcb *inp;
1093 int error;
1094
1095 inp = so->so_pcb;
1096 if (inp) {
1097 error = in_pcbbind(inp, nam, td);
1098 if (error == 0) {
1099 if (sin->sin_addr.s_addr != INADDR_ANY)
1100 inp->inp_flags |= INP_WASBOUND_NOTANY;
1101
1102 udbinfo_barrier_set();
1103 in_pcbinswildcardhash(inp);
1104 udbinfo_barrier_rem();
1105 }
1106 } else {
1107 error = EINVAL;
1108 }
1109 lwkt_replymsg(&msg->bind.base.lmsg, error);
1110 }
1111
1112 static void
1113 udp_connect(netmsg_t msg)
1114 {
1115 struct socket *so = msg->connect.base.nm_so;
1116 struct sockaddr *nam = msg->connect.nm_nam;
1117 struct thread *td = msg->connect.nm_td;
1118 struct inpcb *inp;
1119 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1120 struct sockaddr_in *if_sin;
1121 lwkt_port_t port;
1122 int error;
1123
1124 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1125
1126 inp = so->so_pcb;
1127 if (inp == NULL) {
1128 error = EINVAL;
1129 goto out;
1130 }
1131
1132 if (msg->connect.nm_flags & PRUC_RECONNECT) {
1133 panic("UDP does not support RECONNECT");
1134 #ifdef notyet
1135 msg->connect.nm_flags &= ~PRUC_RECONNECT;
1136 in_pcblink(inp, &udbinfo);
1137 #endif
1138 }
1139
1140 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1141 error = EISCONN;
1142 goto out;
1143 }
1144 error = 0;
1145
1146 /*
1147 * Bind if we have to
1148 */
1149 if (td->td_proc && td->td_proc->p_ucred->cr_prison != NULL &&
1150 inp->inp_laddr.s_addr == INADDR_ANY) {
1151 error = in_pcbbind(inp, NULL, td);
1152 if (error)
1153 goto out;
1154 }
1155
1156 /*
1157 * Calculate the correct protocol processing thread. The connect
1158 * operation must run there.
1159 */
1160 error = in_pcbladdr(inp, nam, &if_sin, td);
1161 if (error)
1162 goto out;
1163 if (!prison_remote_ip(td, nam)) {
1164 error = EAFNOSUPPORT; /* IPv6 only jail */
1165 goto out;
1166 }
1167
1168 port = udp_addrport(sin->sin_addr.s_addr, sin->sin_port,
1169 inp->inp_laddr.s_addr, inp->inp_lport);
1170 if (port != &curthread->td_msgport) {
1171 #ifdef notyet
1172 struct route *ro = &inp->inp_route;
1173
1174 /*
1175 * in_pcbladdr() may have allocated a route entry for us
1176 * on the current CPU, but we need a route entry on the
1177 * inpcb's owner CPU, so free it here.
1178 */
1179 if (ro->ro_rt != NULL)
1180 RTFREE(ro->ro_rt);
1181 bzero(ro, sizeof(*ro));
1182
1183 /*
1184 * We are moving the protocol processing port the socket
1185 * is on, we have to unlink here and re-link on the
1186 * target cpu.
1187 */
1188 in_pcbunlink(so->so_pcb, &udbinfo);
1189 /* in_pcbunlink(so->so_pcb, &udbinfo[mycpu->gd_cpuid]); */
1190 sosetport(so, port);
1191 msg->connect.nm_flags |= PRUC_RECONNECT;
1192 msg->connect.base.nm_dispatch = udp_connect;
1193
1194 lwkt_forwardmsg(port, &msg->connect.base.lmsg);
1195 /* msg invalid now */
1196 return;
1197 #else
1198 panic("UDP activity should only be in netisr0");
1199 #endif
1200 }
1201 KKASSERT(port == &curthread->td_msgport);
1202 error = udp_connect_oncpu(so, td, sin, if_sin);
1203 out:
1204 KKASSERT(msg->connect.nm_m == NULL);
1205 lwkt_replymsg(&msg->connect.base.lmsg, error);
1206 }
1207
1208 static int
1209 udp_connect_oncpu(struct socket *so, struct thread *td,
1210 struct sockaddr_in *sin, struct sockaddr_in *if_sin)
1211 {
1212 struct inpcb *inp;
1213 int error;
1214
1215 udbinfo_barrier_set();
1216
1217 inp = so->so_pcb;
1218 if (inp->inp_flags & INP_WILDCARD)
1219 in_pcbremwildcardhash(inp);
1220 error = in_pcbconnect(inp, (struct sockaddr *)sin, td);
1221
1222 if (error == 0) {
1223 /*
1224 * No more errors can occur, finish adjusting the socket
1225 * and change the processing port to reflect the connected
1226 * socket. Once set we can no longer safely mess with the
1227 * socket.
1228 */
1229 soisconnected(so);
1230 } else if (error == EAFNOSUPPORT) { /* connection dissolved */
1231 /*
1232 * Follow traditional BSD behavior and retain
1233 * the local port binding. But, fix the old misbehavior
1234 * of overwriting any previously bound local address.
1235 */
1236 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
1237 inp->inp_laddr.s_addr = INADDR_ANY;
1238 in_pcbinswildcardhash(inp);
1239 }
1240
1241 udbinfo_barrier_rem();
1242 return error;
1243 }
1244
1245 static void
1246 udp_detach(netmsg_t msg)
1247 {
1248 struct socket *so = msg->detach.base.nm_so;
1249 struct inpcb *inp;
1250 int error;
1251
1252 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1253
1254 inp = so->so_pcb;
1255 if (inp) {
1256 udbinfo_barrier_set();
1257 in_pcbdetach(inp);
1258 udbinfo_barrier_rem();
1259 error = 0;
1260 } else {
1261 error = EINVAL;
1262 }
1263 lwkt_replymsg(&msg->detach.base.lmsg, error);
1264 }
1265
1266 static void
1267 udp_disconnect(netmsg_t msg)
1268 {
1269 struct socket *so = msg->disconnect.base.nm_so;
1270 struct route *ro;
1271 struct inpcb *inp;
1272 int error;
1273
1274 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1275
1276 inp = so->so_pcb;
1277 if (inp == NULL) {
1278 error = EINVAL;
1279 goto out;
1280 }
1281 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1282 error = ENOTCONN;
1283 goto out;
1284 }
1285
1286 soreference(so);
1287
1288 udbinfo_barrier_set();
1289 in_pcbdisconnect(inp);
1290 udbinfo_barrier_rem();
1291
1292 soclrstate(so, SS_ISCONNECTED); /* XXX */
1293 sofree(so);
1294
1295 ro = &inp->inp_route;
1296 if (ro->ro_rt != NULL)
1297 RTFREE(ro->ro_rt);
1298 bzero(ro, sizeof(*ro));
1299 error = 0;
1300 out:
1301 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
1302 }
1303
1304 static void
1305 udp_send(netmsg_t msg)
1306 {
1307 struct socket *so = msg->send.base.nm_so;
1308 struct mbuf *m = msg->send.nm_m;
1309 struct sockaddr *addr = msg->send.nm_addr;
1310 int pru_flags = msg->send.nm_flags;
1311 struct inpcb *inp;
1312 int error;
1313
1314 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1315 KKASSERT(msg->send.nm_control == NULL);
1316
1317 inp = so->so_pcb;
1318 if (inp) {
1319 struct thread *td = msg->send.nm_td;
1320 int flags = 0;
1321
1322 if (pru_flags & PRUS_DONTROUTE)
1323 flags |= SO_DONTROUTE;
1324 error = udp_output(inp, m, addr, td, flags,
1325 (pru_flags & PRUS_HELDTD) ? TRUE : FALSE);
1326 } else {
1327 if (pru_flags & PRUS_HELDTD)
1328 lwkt_rele(msg->send.nm_td);
1329 m_freem(m);
1330 error = EINVAL;
1331 }
1332
1333 if (pru_flags & PRUS_FREEADDR)
1334 kfree(addr, M_SONAME);
1335
1336 if ((pru_flags & PRUS_NOREPLY) == 0)
1337 lwkt_replymsg(&msg->send.base.lmsg, error);
1338 }
1339
1340 void
1341 udp_shutdown(netmsg_t msg)
1342 {
1343 struct socket *so = msg->shutdown.base.nm_so;
1344 struct inpcb *inp;
1345 int error;
1346
1347 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
1348
1349 inp = so->so_pcb;
1350 if (inp) {
1351 socantsendmore(so);
1352 error = 0;
1353 } else {
1354 error = EINVAL;
1355 }
1356 lwkt_replymsg(&msg->shutdown.base.lmsg, error);
1357 }
1358
1359 void
1360 udbinfo_lock(void)
1361 {
1362 lwkt_serialize_enter(&udbinfo_slize);
1363 }
1364
1365 void
1366 udbinfo_unlock(void)
1367 {
1368 lwkt_serialize_exit(&udbinfo_slize);
1369 }
1370
1371 void
1372 udbinfo_barrier_set(void)
1373 {
1374 netisr_barrier_set(udbinfo_br);
1375 udbinfo_lock();
1376 }
1377
1378 void
1379 udbinfo_barrier_rem(void)
1380 {
1381 udbinfo_unlock();
1382 netisr_barrier_rem(udbinfo_br);
1383 }
1384
1385 struct pr_usrreqs udp_usrreqs = {
1386 .pru_abort = udp_abort,
1387 .pru_accept = pr_generic_notsupp,
1388 .pru_attach = udp_attach,
1389 .pru_bind = udp_bind,
1390 .pru_connect = udp_connect,
1391 .pru_connect2 = pr_generic_notsupp,
1392 .pru_control = in_control_dispatch,
1393 .pru_detach = udp_detach,
1394 .pru_disconnect = udp_disconnect,
1395 .pru_listen = pr_generic_notsupp,
1396 .pru_peeraddr = in_setpeeraddr_dispatch,
1397 .pru_rcvd = pr_generic_notsupp,
1398 .pru_rcvoob = pr_generic_notsupp,
1399 .pru_send = udp_send,
1400 .pru_sense = pru_sense_null,
1401 .pru_shutdown = udp_shutdown,
1402 .pru_sockaddr = in_setsockaddr_dispatch,
1403 .pru_sosend = sosendudp,
1404 .pru_soreceive = soreceive
1405 };
1406
Cache object: 63e462ae25f94328519518217bd48c03
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