2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
5 * The Regents of the University of California.
6 * Copyright (c) 2008 Robert N. M. Watson
7 * Copyright (c) 2010-2011 Juniper Networks, Inc.
8 * Copyright (c) 2014 Kevin Lo
11 * Portions of this software were developed by Robert N. M. Watson under
12 * contract to Juniper Networks, Inc.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 #include "opt_inet6.h"
46 #include "opt_ipsec.h"
47 #include "opt_route.h"
50 #include <sys/param.h>
51 #include <sys/domain.h>
52 #include <sys/eventhandler.h>
54 #include <sys/kernel.h>
56 #include <sys/malloc.h>
60 #include <sys/protosw.h>
62 #include <sys/signalvar.h>
63 #include <sys/socket.h>
64 #include <sys/socketvar.h>
66 #include <sys/sysctl.h>
67 #include <sys/syslog.h>
68 #include <sys/systm.h>
73 #include <net/if_var.h>
74 #include <net/route.h>
75 #include <net/route/nhop.h>
76 #include <net/rss_config.h>
78 #include <netinet/in.h>
79 #include <netinet/in_kdtrace.h>
80 #include <netinet/in_fib.h>
81 #include <netinet/in_pcb.h>
82 #include <netinet/in_systm.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
86 #include <netinet/ip6.h>
88 #include <netinet/ip_icmp.h>
89 #include <netinet/icmp_var.h>
90 #include <netinet/ip_var.h>
91 #include <netinet/ip_options.h>
93 #include <netinet6/ip6_var.h>
95 #include <netinet/udp.h>
96 #include <netinet/udp_var.h>
97 #include <netinet/udplite.h>
98 #include <netinet/in_rss.h>
100 #include <netipsec/ipsec_support.h>
102 #include <machine/in_cksum.h>
104 #include <security/mac/mac_framework.h>
107 * UDP and UDP-Lite protocols implementation.
108 * Per RFC 768, August, 1980.
109 * Per RFC 3828, July, 2004.
113 * BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
114 * removes the only data integrity mechanism for packets and malformed
115 * packets that would otherwise be discarded due to bad checksums, and may
116 * cause problems (especially for NFS data blocks).
118 VNET_DEFINE(int, udp_cksum) = 1;
119 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_VNET | CTLFLAG_RW,
120 &VNET_NAME(udp_cksum), 0, "compute udp checksum");
122 VNET_DEFINE(int, udp_log_in_vain) = 0;
123 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_VNET | CTLFLAG_RW,
124 &VNET_NAME(udp_log_in_vain), 0, "Log all incoming UDP packets");
126 VNET_DEFINE(int, udp_blackhole) = 0;
127 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_VNET | CTLFLAG_RW,
128 &VNET_NAME(udp_blackhole), 0,
129 "Do not send port unreachables for refused connects");
131 u_long udp_sendspace = 9216; /* really max datagram size */
132 SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
133 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
135 u_long udp_recvspace = 40 * (1024 +
137 sizeof(struct sockaddr_in6)
139 sizeof(struct sockaddr_in)
141 ); /* 40 1K datagrams */
143 SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
144 &udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
146 VNET_DEFINE(struct inpcbhead, udb); /* from udp_var.h */
147 VNET_DEFINE(struct inpcbinfo, udbinfo);
148 VNET_DEFINE(struct inpcbhead, ulitecb);
149 VNET_DEFINE(struct inpcbinfo, ulitecbinfo);
150 VNET_DEFINE_STATIC(uma_zone_t, udpcb_zone);
151 #define V_udpcb_zone VNET(udpcb_zone)
154 #define UDBHASHSIZE 128
157 VNET_PCPUSTAT_DEFINE(struct udpstat, udpstat); /* from udp_var.h */
158 VNET_PCPUSTAT_SYSINIT(udpstat);
159 SYSCTL_VNET_PCPUSTAT(_net_inet_udp, UDPCTL_STATS, stats, struct udpstat,
160 udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
163 VNET_PCPUSTAT_SYSUNINIT(udpstat);
166 static void udp_detach(struct socket *so);
167 static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
168 struct mbuf *, struct thread *, int);
172 udp_zone_change(void *tag)
175 uma_zone_set_max(V_udbinfo.ipi_zone, maxsockets);
176 uma_zone_set_max(V_udpcb_zone, maxsockets);
180 udp_inpcb_init(void *mem, int size, int flags)
185 INP_LOCK_INIT(inp, "inp", "udpinp");
190 udplite_inpcb_init(void *mem, int size, int flags)
195 INP_LOCK_INIT(inp, "inp", "udpliteinp");
204 * For now default to 2-tuple UDP hashing - until the fragment
205 * reassembly code can also update the flowid.
207 * Once we can calculate the flowid that way and re-establish
208 * a 4-tuple, flip this to 4-tuple.
210 in_pcbinfo_init(&V_udbinfo, "udp", &V_udb, UDBHASHSIZE, UDBHASHSIZE,
211 "udp_inpcb", udp_inpcb_init, IPI_HASHFIELDS_2TUPLE);
212 V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
213 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
214 uma_zone_set_max(V_udpcb_zone, maxsockets);
215 uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached");
216 EVENTHANDLER_REGISTER(maxsockets_change, udp_zone_change, NULL,
217 EVENTHANDLER_PRI_ANY);
224 in_pcbinfo_init(&V_ulitecbinfo, "udplite", &V_ulitecb, UDBHASHSIZE,
225 UDBHASHSIZE, "udplite_inpcb", udplite_inpcb_init,
226 IPI_HASHFIELDS_2TUPLE);
230 * Kernel module interface for updating udpstat. The argument is an index
231 * into udpstat treated as an array of u_long. While this encodes the
232 * general layout of udpstat into the caller, it doesn't encode its location,
233 * so that future changes to add, for example, per-CPU stats support won't
234 * cause binary compatibility problems for kernel modules.
237 kmod_udpstat_inc(int statnum)
240 counter_u64_add(VNET(udpstat)[statnum], 1);
244 udp_newudpcb(struct inpcb *inp)
248 up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO);
256 udp_discardcb(struct udpcb *up)
259 uma_zfree(V_udpcb_zone, up);
264 udp_destroy(void *unused __unused)
267 in_pcbinfo_destroy(&V_udbinfo);
268 uma_zdestroy(V_udpcb_zone);
270 VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
273 udplite_destroy(void *unused __unused)
276 in_pcbinfo_destroy(&V_ulitecbinfo);
278 VNET_SYSUNINIT(udplite, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udplite_destroy,
284 * Subroutine of udp_input(), which appends the provided mbuf chain to the
285 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
286 * contains the source address. If the socket ends up being an IPv6 socket,
287 * udp_append() will convert to a sockaddr_in6 before passing the address
288 * into the socket code.
290 * In the normal case udp_append() will return 0, indicating that you
291 * must unlock the inp. However if a tunneling protocol is in place we increment
292 * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we
293 * then decrement the reference count. If the inp_rele returns 1, indicating the
294 * inp is gone, we return that to the caller to tell them *not* to unlock
295 * the inp. In the case of multi-cast this will cause the distribution
296 * to stop (though most tunneling protocols known currently do *not* use
300 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
301 struct sockaddr_in *udp_in)
303 struct sockaddr *append_sa;
305 struct mbuf *tmpopts, *opts = NULL;
307 struct sockaddr_in6 udp_in6;
311 INP_LOCK_ASSERT(inp);
314 * Engage the tunneling protocol.
317 if (up->u_tun_func != NULL) {
320 (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0],
323 return (in_pcbrele_rlocked(inp));
326 off += sizeof(struct udphdr);
328 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
329 /* Check AH/ESP integrity. */
330 if (IPSEC_ENABLED(ipv4) &&
331 IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) {
335 if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */
336 if (IPSEC_ENABLED(ipv4) &&
337 UDPENCAP_INPUT(n, off, AF_INET) != 0)
338 return (0); /* Consumed. */
342 if (mac_inpcb_check_deliver(inp, n) != 0) {
347 if (inp->inp_flags & INP_CONTROLOPTS ||
348 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
350 if (inp->inp_vflag & INP_IPV6)
351 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
354 ip_savecontrol(inp, &opts, ip, n);
356 if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
357 tmpopts = sbcreatecontrol((caddr_t)&udp_in[1],
358 sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP);
361 tmpopts->m_next = opts;
368 if (inp->inp_vflag & INP_IPV6) {
369 bzero(&udp_in6, sizeof(udp_in6));
370 udp_in6.sin6_len = sizeof(udp_in6);
371 udp_in6.sin6_family = AF_INET6;
372 in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6);
373 append_sa = (struct sockaddr *)&udp_in6;
376 append_sa = (struct sockaddr *)&udp_in[0];
379 so = inp->inp_socket;
380 SOCKBUF_LOCK(&so->so_rcv);
381 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
382 soroverflow_locked(so);
386 UDPSTAT_INC(udps_fullsock);
388 sorwakeup_locked(so);
393 udp_input(struct mbuf **mp, int *offp, int proto)
399 uint16_t len, ip_len;
400 struct inpcbinfo *pcbinfo;
402 struct sockaddr_in udp_in[2];
404 struct m_tag *fwd_tag;
405 int cscov_partial, iphlen;
409 ifp = m->m_pkthdr.rcvif;
411 UDPSTAT_INC(udps_ipackets);
414 * Strip IP options, if any; should skip this, make available to
415 * user, and use on returned packets, but we don't yet have a way to
416 * check the checksum with options still present.
418 if (iphlen > sizeof (struct ip)) {
420 iphlen = sizeof(struct ip);
424 * Get IP and UDP header together in first mbuf.
426 if (m->m_len < iphlen + sizeof(struct udphdr)) {
427 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) {
428 UDPSTAT_INC(udps_hdrops);
429 return (IPPROTO_DONE);
432 ip = mtod(m, struct ip *);
433 uh = (struct udphdr *)((caddr_t)ip + iphlen);
434 cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0;
437 * Destination port of 0 is illegal, based on RFC768.
439 if (uh->uh_dport == 0)
443 * Construct sockaddr format source address. Stuff source address
444 * and datagram in user buffer.
446 bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2);
447 udp_in[0].sin_len = sizeof(struct sockaddr_in);
448 udp_in[0].sin_family = AF_INET;
449 udp_in[0].sin_port = uh->uh_sport;
450 udp_in[0].sin_addr = ip->ip_src;
451 udp_in[1].sin_len = sizeof(struct sockaddr_in);
452 udp_in[1].sin_family = AF_INET;
453 udp_in[1].sin_port = uh->uh_dport;
454 udp_in[1].sin_addr = ip->ip_dst;
457 * Make mbuf data length reflect UDP length. If not enough data to
458 * reflect UDP length, drop.
460 len = ntohs((u_short)uh->uh_ulen);
461 ip_len = ntohs(ip->ip_len) - iphlen;
462 if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) {
463 /* Zero means checksum over the complete packet. */
469 if (len > ip_len || len < sizeof(struct udphdr)) {
470 UDPSTAT_INC(udps_badlen);
473 if (proto == IPPROTO_UDP)
474 m_adj(m, len - ip_len);
478 * Save a copy of the IP header in case we want restore it for
479 * sending an ICMP error message in response.
481 if (!V_udp_blackhole)
484 memset(&save_ip, 0, sizeof(save_ip));
487 * Checksum extended UDP header and data.
492 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
494 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
495 uh_sum = m->m_pkthdr.csum_data;
497 uh_sum = in_pseudo(ip->ip_src.s_addr,
498 ip->ip_dst.s_addr, htonl((u_short)len +
499 m->m_pkthdr.csum_data + proto));
504 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
505 bzero(((struct ipovly *)ip)->ih_x1, 9);
506 ((struct ipovly *)ip)->ih_len = (proto == IPPROTO_UDP) ?
507 uh->uh_ulen : htons(ip_len);
508 uh_sum = in_cksum(m, len + sizeof (struct ip));
509 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
512 UDPSTAT_INC(udps_badsum);
514 return (IPPROTO_DONE);
517 if (proto == IPPROTO_UDP) {
518 UDPSTAT_INC(udps_nosum);
520 /* UDPLite requires a checksum */
521 /* XXX: What is the right UDPLite MIB counter here? */
523 return (IPPROTO_DONE);
527 pcbinfo = udp_get_inpcbinfo(proto);
528 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
529 in_broadcast(ip->ip_dst, ifp)) {
531 struct inpcbhead *pcblist;
535 pcblist = udp_get_pcblist(proto);
537 CK_LIST_FOREACH(inp, pcblist, inp_list) {
538 if (inp->inp_lport != uh->uh_dport)
541 if ((inp->inp_vflag & INP_IPV4) == 0)
544 if (inp->inp_laddr.s_addr != INADDR_ANY &&
545 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
547 if (inp->inp_faddr.s_addr != INADDR_ANY &&
548 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
550 if (inp->inp_fport != 0 &&
551 inp->inp_fport != uh->uh_sport)
556 if (__predict_false(inp->inp_flags2 & INP_FREED)) {
562 * XXXRW: Because we weren't holding either the inpcb
563 * or the hash lock when we checked for a match
564 * before, we should probably recheck now that the
565 * inpcb lock is held.
569 * Handle socket delivery policy for any-source
570 * and source-specific multicast. [RFC3678]
572 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
573 struct ip_moptions *imo;
574 struct sockaddr_in group;
577 imo = inp->inp_moptions;
582 bzero(&group, sizeof(struct sockaddr_in));
583 group.sin_len = sizeof(struct sockaddr_in);
584 group.sin_family = AF_INET;
585 group.sin_addr = ip->ip_dst;
587 blocked = imo_multi_filter(imo, ifp,
588 (struct sockaddr *)&group,
589 (struct sockaddr *)&udp_in[0]);
590 if (blocked != MCAST_PASS) {
591 if (blocked == MCAST_NOTGMEMBER)
592 IPSTAT_INC(ips_notmember);
593 if (blocked == MCAST_NOTSMEMBER ||
594 blocked == MCAST_MUTED)
595 UDPSTAT_INC(udps_filtermcast);
603 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) !=
605 if (proto == IPPROTO_UDPLITE)
606 UDPLITE_PROBE(receive, NULL, last, ip,
609 UDP_PROBE(receive, NULL, last, ip, last,
611 if (udp_append(last, ip, n, iphlen,
617 /* Release PCB lock taken on previous pass. */
622 * Don't look for additional matches if this one does
623 * not have either the SO_REUSEPORT or SO_REUSEADDR
624 * socket options set. This heuristic avoids
625 * searching through all pcbs in the common case of a
626 * non-shared port. It assumes that an application
627 * will never clear these options after setting them.
629 if ((last->inp_socket->so_options &
630 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0)
636 * No matching pcb found; discard datagram. (No need
637 * to send an ICMP Port Unreachable for a broadcast
638 * or multicast datgram.)
640 UDPSTAT_INC(udps_noport);
641 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)))
642 UDPSTAT_INC(udps_noportmcast);
644 UDPSTAT_INC(udps_noportbcast);
647 if (proto == IPPROTO_UDPLITE)
648 UDPLITE_PROBE(receive, NULL, last, ip, last, uh);
650 UDP_PROBE(receive, NULL, last, ip, last, uh);
651 if (udp_append(last, ip, m, iphlen, udp_in) == 0)
653 return (IPPROTO_DONE);
657 * Locate pcb for datagram.
661 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
663 if ((m->m_flags & M_IP_NEXTHOP) &&
664 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
665 struct sockaddr_in *next_hop;
667 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
670 * Transparently forwarded. Pretend to be the destination.
671 * Already got one like this?
673 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
674 ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
677 * It's new. Try to find the ambushing socket.
678 * Because we've rewritten the destination address,
679 * any hardware-generated hash is ignored.
681 inp = in_pcblookup(pcbinfo, ip->ip_src,
682 uh->uh_sport, next_hop->sin_addr,
683 next_hop->sin_port ? htons(next_hop->sin_port) :
684 uh->uh_dport, INPLOOKUP_WILDCARD |
685 INPLOOKUP_RLOCKPCB, ifp);
687 /* Remove the tag from the packet. We don't need it anymore. */
688 m_tag_delete(m, fwd_tag);
689 m->m_flags &= ~M_IP_NEXTHOP;
691 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
692 ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
693 INPLOOKUP_RLOCKPCB, ifp, m);
695 if (V_udp_log_in_vain) {
696 char src[INET_ADDRSTRLEN];
697 char dst[INET_ADDRSTRLEN];
700 "Connection attempt to UDP %s:%d from %s:%d\n",
701 inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport),
702 inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport));
704 if (proto == IPPROTO_UDPLITE)
705 UDPLITE_PROBE(receive, NULL, NULL, ip, NULL, uh);
707 UDP_PROBE(receive, NULL, NULL, ip, NULL, uh);
708 UDPSTAT_INC(udps_noport);
709 if (m->m_flags & (M_BCAST | M_MCAST)) {
710 UDPSTAT_INC(udps_noportbcast);
715 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
718 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
719 return (IPPROTO_DONE);
723 * Check the minimum TTL for socket.
725 INP_RLOCK_ASSERT(inp);
726 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
727 if (proto == IPPROTO_UDPLITE)
728 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
730 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
733 return (IPPROTO_DONE);
739 if (up->u_rxcslen == 0 || up->u_rxcslen > len) {
742 return (IPPROTO_DONE);
746 if (proto == IPPROTO_UDPLITE)
747 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
749 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
750 if (udp_append(inp, ip, m, iphlen, udp_in) == 0)
752 return (IPPROTO_DONE);
756 return (IPPROTO_DONE);
761 * Notify a udp user of an asynchronous error; just wake up so that they can
762 * collect error status.
765 udp_notify(struct inpcb *inp, int errno)
768 INP_WLOCK_ASSERT(inp);
769 if ((errno == EHOSTUNREACH || errno == ENETUNREACH ||
770 errno == EHOSTDOWN) && inp->inp_route.ro_nh) {
771 NH_FREE(inp->inp_route.ro_nh);
772 inp->inp_route.ro_nh = (struct nhop_object *)NULL;
775 inp->inp_socket->so_error = errno;
776 sorwakeup(inp->inp_socket);
777 sowwakeup(inp->inp_socket);
783 udp_common_ctlinput(int cmd, struct sockaddr *sa, void *vip,
784 struct inpcbinfo *pcbinfo)
788 struct in_addr faddr;
791 faddr = ((struct sockaddr_in *)sa)->sin_addr;
792 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
795 if (PRC_IS_REDIRECT(cmd)) {
796 /* signal EHOSTDOWN, as it flushes the cached route */
797 in_pcbnotifyall(pcbinfo, faddr, EHOSTDOWN, udp_notify);
802 * Hostdead is ugly because it goes linearly through all PCBs.
804 * XXX: We never get this from ICMP, otherwise it makes an excellent
805 * DoS attack on machines with many connections.
807 if (cmd == PRC_HOSTDEAD)
809 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
812 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
813 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
814 ip->ip_src, uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL);
816 INP_WLOCK_ASSERT(inp);
817 if (inp->inp_socket != NULL) {
818 udp_notify(inp, inetctlerrmap[cmd]);
822 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
823 ip->ip_src, uh->uh_sport,
824 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
832 func = up->u_icmp_func;
835 (*func)(cmd, sa, vip, ctx);
839 in_pcbnotifyall(pcbinfo, faddr, inetctlerrmap[cmd],
843 udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
846 return (udp_common_ctlinput(cmd, sa, vip, &V_udbinfo));
850 udplite_ctlinput(int cmd, struct sockaddr *sa, void *vip)
853 return (udp_common_ctlinput(cmd, sa, vip, &V_ulitecbinfo));
858 udp_pcblist(SYSCTL_HANDLER_ARGS)
861 struct epoch_tracker et;
865 if (req->newptr != 0)
868 if (req->oldptr == 0) {
871 n = V_udbinfo.ipi_count;
872 n += imax(n / 8, 10);
873 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
877 if ((error = sysctl_wire_old_buffer(req, 0)) != 0)
880 bzero(&xig, sizeof(xig));
881 xig.xig_len = sizeof xig;
882 xig.xig_count = V_udbinfo.ipi_count;
883 xig.xig_gen = V_udbinfo.ipi_gencnt;
884 xig.xig_sogen = so_gencnt;
885 error = SYSCTL_OUT(req, &xig, sizeof xig);
890 for (inp = CK_LIST_FIRST(V_udbinfo.ipi_listhead);
892 inp = CK_LIST_NEXT(inp, inp_list)) {
894 if (inp->inp_gencnt <= xig.xig_gen &&
895 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
898 in_pcbtoxinpcb(inp, &xi);
900 error = SYSCTL_OUT(req, &xi, sizeof xi);
910 * Give the user an updated idea of our state. If the
911 * generation differs from what we told her before, she knows
912 * that something happened while we were processing this
913 * request, and it might be necessary to retry.
915 xig.xig_gen = V_udbinfo.ipi_gencnt;
916 xig.xig_sogen = so_gencnt;
917 xig.xig_count = V_udbinfo.ipi_count;
918 error = SYSCTL_OUT(req, &xig, sizeof xig);
924 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist,
925 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
926 udp_pcblist, "S,xinpcb",
927 "List of active UDP sockets");
931 udp_getcred(SYSCTL_HANDLER_ARGS)
934 struct sockaddr_in addrs[2];
935 struct epoch_tracker et;
939 error = priv_check(req->td, PRIV_NETINET_GETCRED);
942 error = SYSCTL_IN(req, addrs, sizeof(addrs));
946 inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
947 addrs[0].sin_addr, addrs[0].sin_port,
948 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
951 INP_RLOCK_ASSERT(inp);
952 if (inp->inp_socket == NULL)
955 error = cr_canseeinpcb(req->td->td_ucred, inp);
957 cru2x(inp->inp_cred, &xuc);
962 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
966 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
967 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
968 0, 0, udp_getcred, "S,xucred",
969 "Get the xucred of a UDP connection");
973 udp_ctloutput(struct socket *so, struct sockopt *sopt)
977 int isudplite, error, optval;
980 isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0;
982 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
984 if (sopt->sopt_level != so->so_proto->pr_protocol) {
986 if (INP_CHECK_SOCKAF(so, AF_INET6)) {
988 error = ip6_ctloutput(so, sopt);
991 #if defined(INET) && defined(INET6)
997 error = ip_ctloutput(so, sopt);
1003 switch (sopt->sopt_dir) {
1005 switch (sopt->sopt_name) {
1006 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1009 if (!IPSEC_ENABLED(ipv4)) {
1011 return (ENOPROTOOPT);
1013 error = UDPENCAP_PCBCTL(inp, sopt);
1017 case UDPLITE_SEND_CSCOV:
1018 case UDPLITE_RECV_CSCOV:
1021 error = ENOPROTOOPT;
1025 error = sooptcopyin(sopt, &optval, sizeof(optval),
1029 inp = sotoinpcb(so);
1030 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
1032 up = intoudpcb(inp);
1033 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1034 if ((optval != 0 && optval < 8) || (optval > 65535)) {
1039 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1040 up->u_txcslen = optval;
1042 up->u_rxcslen = optval;
1047 error = ENOPROTOOPT;
1052 switch (sopt->sopt_name) {
1053 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1056 if (!IPSEC_ENABLED(ipv4)) {
1058 return (ENOPROTOOPT);
1060 error = UDPENCAP_PCBCTL(inp, sopt);
1064 case UDPLITE_SEND_CSCOV:
1065 case UDPLITE_RECV_CSCOV:
1068 error = ENOPROTOOPT;
1071 up = intoudpcb(inp);
1072 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1073 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1074 optval = up->u_txcslen;
1076 optval = up->u_rxcslen;
1078 error = sooptcopyout(sopt, &optval, sizeof(optval));
1082 error = ENOPROTOOPT;
1092 /* The logic here is derived from ip6_setpktopt(). See comments there. */
1094 udp_v4mapped_pktinfo(struct cmsghdr *cm, struct sockaddr_in * src,
1095 struct inpcb *inp, int flags)
1098 struct in6_pktinfo *pktinfo;
1101 if ((flags & PRUS_IPV6) == 0)
1104 if (cm->cmsg_level != IPPROTO_IPV6)
1107 if (cm->cmsg_type != IPV6_2292PKTINFO &&
1108 cm->cmsg_type != IPV6_PKTINFO)
1112 CMSG_LEN(sizeof(struct in6_pktinfo)))
1115 pktinfo = (struct in6_pktinfo *)CMSG_DATA(cm);
1116 if (!IN6_IS_ADDR_V4MAPPED(&pktinfo->ipi6_addr) &&
1117 !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr))
1120 /* Validate the interface index if specified. */
1121 if (pktinfo->ipi6_ifindex > V_if_index)
1125 if (pktinfo->ipi6_ifindex) {
1126 ifp = ifnet_byindex(pktinfo->ipi6_ifindex);
1130 if (ifp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
1131 ia.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1132 if (in_ifhasaddr(ifp, ia) == 0)
1133 return (EADDRNOTAVAIL);
1136 bzero(src, sizeof(*src));
1137 src->sin_family = AF_INET;
1138 src->sin_len = sizeof(*src);
1139 src->sin_port = inp->inp_lport;
1140 src->sin_addr.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1147 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
1148 struct mbuf *control, struct thread *td, int flags)
1150 struct udpiphdr *ui;
1151 int len = m->m_pkthdr.len;
1152 struct in_addr faddr, laddr;
1154 struct inpcbinfo *pcbinfo;
1155 struct sockaddr_in *sin, src;
1156 struct epoch_tracker et;
1157 int cscov_partial = 0;
1160 u_short fport, lport;
1164 uint32_t flowid = 0;
1165 uint8_t flowtype = M_HASHTYPE_NONE;
1167 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1175 sin = (struct sockaddr_in *)addr;
1178 * udp_output() may need to temporarily bind or connect the current
1179 * inpcb. As such, we don't know up front whether we will need the
1180 * pcbinfo lock or not. Do any work to decide what is needed up
1181 * front before acquiring any locks.
1183 * We will need network epoch in either case, to safely lookup into
1187 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0))
1191 NET_EPOCH_ENTER(et);
1192 tos = inp->inp_ip_tos;
1193 if (control != NULL) {
1195 * XXX: Currently, we assume all the optional information is
1196 * stored in a single mbuf.
1198 if (control->m_next) {
1203 for (; control->m_len > 0;
1204 control->m_data += CMSG_ALIGN(cm->cmsg_len),
1205 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
1206 cm = mtod(control, struct cmsghdr *);
1207 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
1208 || cm->cmsg_len > control->m_len) {
1213 error = udp_v4mapped_pktinfo(cm, &src, inp, flags);
1217 if (cm->cmsg_level != IPPROTO_IP)
1220 switch (cm->cmsg_type) {
1221 case IP_SENDSRCADDR:
1223 CMSG_LEN(sizeof(struct in_addr))) {
1227 bzero(&src, sizeof(src));
1228 src.sin_family = AF_INET;
1229 src.sin_len = sizeof(src);
1230 src.sin_port = inp->inp_lport;
1232 *(struct in_addr *)CMSG_DATA(cm);
1236 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
1240 tos = *(u_char *)CMSG_DATA(cm);
1244 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1248 flowid = *(uint32_t *) CMSG_DATA(cm);
1252 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1256 flowtype = *(uint32_t *) CMSG_DATA(cm);
1260 case IP_RSSBUCKETID:
1261 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1265 /* This is just a placeholder for now */
1269 error = ENOPROTOOPT;
1281 pr = inp->inp_socket->so_proto->pr_protocol;
1282 pcbinfo = udp_get_inpcbinfo(pr);
1285 * If the IP_SENDSRCADDR control message was specified, override the
1286 * source address for this datagram. Its use is invalidated if the
1287 * address thus specified is incomplete or clobbers other inpcbs.
1289 laddr = inp->inp_laddr;
1290 lport = inp->inp_lport;
1291 if (src.sin_family == AF_INET) {
1292 INP_HASH_LOCK_ASSERT(pcbinfo);
1294 (laddr.s_addr == INADDR_ANY &&
1295 src.sin_addr.s_addr == INADDR_ANY)) {
1299 error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
1300 &laddr.s_addr, &lport, td->td_ucred);
1306 * If a UDP socket has been connected, then a local address/port will
1307 * have been selected and bound.
1309 * If a UDP socket has not been connected to, then an explicit
1310 * destination address must be used, in which case a local
1311 * address/port may not have been selected and bound.
1314 INP_LOCK_ASSERT(inp);
1315 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1321 * Jail may rewrite the destination address, so let it do
1322 * that before we use it.
1324 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1329 * If a local address or port hasn't yet been selected, or if
1330 * the destination address needs to be rewritten due to using
1331 * a special INADDR_ constant, invoke in_pcbconnect_setup()
1332 * to do the heavy lifting. Once a port is selected, we
1333 * commit the binding back to the socket; we also commit the
1334 * binding of the address if in jail.
1336 * If we already have a valid binding and we're not
1337 * requesting a destination address rewrite, use a fast path.
1339 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1340 inp->inp_lport == 0 ||
1341 sin->sin_addr.s_addr == INADDR_ANY ||
1342 sin->sin_addr.s_addr == INADDR_BROADCAST) {
1343 INP_HASH_LOCK_ASSERT(pcbinfo);
1344 error = in_pcbconnect_setup(inp, addr, &laddr.s_addr,
1345 &lport, &faddr.s_addr, &fport, NULL,
1351 * XXXRW: Why not commit the port if the address is
1354 /* Commit the local port if newly assigned. */
1355 if (inp->inp_laddr.s_addr == INADDR_ANY &&
1356 inp->inp_lport == 0) {
1357 INP_WLOCK_ASSERT(inp);
1359 * Remember addr if jailed, to prevent
1362 if (prison_flag(td->td_ucred, PR_IP4))
1363 inp->inp_laddr = laddr;
1364 inp->inp_lport = lport;
1365 INP_HASH_WLOCK(pcbinfo);
1366 error = in_pcbinshash(inp);
1367 INP_HASH_WUNLOCK(pcbinfo);
1373 inp->inp_flags |= INP_ANONPORT;
1376 faddr = sin->sin_addr;
1377 fport = sin->sin_port;
1380 INP_LOCK_ASSERT(inp);
1381 faddr = inp->inp_faddr;
1382 fport = inp->inp_fport;
1383 if (faddr.s_addr == INADDR_ANY) {
1390 * Calculate data length and get a mbuf for UDP, IP, and possible
1391 * link-layer headers. Immediate slide the data pointer back forward
1392 * since we won't use that space at this layer.
1394 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT);
1399 m->m_data += max_linkhdr;
1400 m->m_len -= max_linkhdr;
1401 m->m_pkthdr.len -= max_linkhdr;
1404 * Fill in mbuf with extended UDP header and addresses and length put
1405 * into network format.
1407 ui = mtod(m, struct udpiphdr *);
1408 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1409 ui->ui_v = IPVERSION << 4;
1413 ui->ui_sport = lport;
1414 ui->ui_dport = fport;
1415 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1416 if (pr == IPPROTO_UDPLITE) {
1420 up = intoudpcb(inp);
1421 cscov = up->u_txcslen;
1422 plen = (u_short)len + sizeof(struct udphdr);
1425 ui->ui_len = htons(plen);
1426 ui->ui_ulen = htons(cscov);
1428 * For UDP-Lite, checksum coverage length of zero means
1429 * the entire UDPLite packet is covered by the checksum.
1431 cscov_partial = (cscov == 0) ? 0 : 1;
1435 * Set the Don't Fragment bit in the IP header.
1437 if (inp->inp_flags & INP_DONTFRAG) {
1440 ip = (struct ip *)&ui->ui_i;
1441 ip->ip_off |= htons(IP_DF);
1444 if (inp->inp_socket->so_options & SO_DONTROUTE)
1445 ipflags |= IP_ROUTETOIF;
1446 if (inp->inp_socket->so_options & SO_BROADCAST)
1447 ipflags |= IP_ALLOWBROADCAST;
1448 if (inp->inp_flags & INP_ONESBCAST)
1449 ipflags |= IP_SENDONES;
1452 mac_inpcb_create_mbuf(inp, m);
1456 * Set up checksum and output datagram.
1459 if (pr == IPPROTO_UDPLITE) {
1460 if (inp->inp_flags & INP_ONESBCAST)
1461 faddr.s_addr = INADDR_BROADCAST;
1462 if (cscov_partial) {
1463 if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
1464 ui->ui_sum = 0xffff;
1466 if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0)
1467 ui->ui_sum = 0xffff;
1469 } else if (V_udp_cksum) {
1470 if (inp->inp_flags & INP_ONESBCAST)
1471 faddr.s_addr = INADDR_BROADCAST;
1472 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1473 htons((u_short)len + sizeof(struct udphdr) + pr));
1474 m->m_pkthdr.csum_flags = CSUM_UDP;
1475 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1477 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len);
1478 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1479 ((struct ip *)ui)->ip_tos = tos; /* XXX */
1480 UDPSTAT_INC(udps_opackets);
1483 * Setup flowid / RSS information for outbound socket.
1485 * Once the UDP code decides to set a flowid some other way,
1486 * this allows the flowid to be overridden by userland.
1488 if (flowtype != M_HASHTYPE_NONE) {
1489 m->m_pkthdr.flowid = flowid;
1490 M_HASHTYPE_SET(m, flowtype);
1492 #if defined(ROUTE_MPATH) || defined(RSS)
1493 else if (CALC_FLOWID_OUTBOUND_SENDTO) {
1494 uint32_t hash_val, hash_type;
1496 hash_val = fib4_calc_packet_hash(laddr, faddr,
1497 lport, fport, pr, &hash_type);
1498 m->m_pkthdr.flowid = hash_val;
1499 M_HASHTYPE_SET(m, hash_type);
1503 * Don't override with the inp cached flowid value.
1505 * Depending upon the kind of send being done, the inp
1506 * flowid/flowtype values may actually not be appropriate
1507 * for this particular socket send.
1509 * We should either leave the flowid at zero (which is what is
1510 * currently done) or set it to some software generated
1511 * hash value based on the packet contents.
1513 ipflags |= IP_NODEFAULTFLOWID;
1516 if (pr == IPPROTO_UDPLITE)
1517 UDPLITE_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1519 UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1520 error = ip_output(m, inp->inp_options,
1521 INP_WLOCKED(inp) ? &inp->inp_route : NULL, ipflags,
1522 inp->inp_moptions, inp);
1535 udp_abort(struct socket *so)
1538 struct inpcbinfo *pcbinfo;
1540 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1541 inp = sotoinpcb(so);
1542 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1544 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1545 INP_HASH_WLOCK(pcbinfo);
1546 in_pcbdisconnect(inp);
1547 inp->inp_laddr.s_addr = INADDR_ANY;
1548 INP_HASH_WUNLOCK(pcbinfo);
1549 soisdisconnected(so);
1555 udp_attach(struct socket *so, int proto, struct thread *td)
1557 static uint32_t udp_flowid;
1559 struct inpcbinfo *pcbinfo;
1562 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1563 inp = sotoinpcb(so);
1564 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1565 error = soreserve(so, udp_sendspace, udp_recvspace);
1568 INP_INFO_WLOCK(pcbinfo);
1569 error = in_pcballoc(so, pcbinfo);
1571 INP_INFO_WUNLOCK(pcbinfo);
1575 inp = sotoinpcb(so);
1576 inp->inp_vflag |= INP_IPV4;
1577 inp->inp_ip_ttl = V_ip_defttl;
1578 inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1);
1579 inp->inp_flowtype = M_HASHTYPE_OPAQUE;
1581 error = udp_newudpcb(inp);
1585 INP_INFO_WUNLOCK(pcbinfo);
1590 INP_INFO_WUNLOCK(pcbinfo);
1596 udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx)
1601 KASSERT(so->so_type == SOCK_DGRAM,
1602 ("udp_set_kernel_tunneling: !dgram"));
1603 inp = sotoinpcb(so);
1604 KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL"));
1606 up = intoudpcb(inp);
1607 if ((f != NULL || i != NULL) && ((up->u_tun_func != NULL) ||
1608 (up->u_icmp_func != NULL))) {
1613 up->u_icmp_func = i;
1614 up->u_tun_ctx = ctx;
1621 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1624 struct inpcbinfo *pcbinfo;
1625 struct sockaddr_in *sinp;
1628 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1629 inp = sotoinpcb(so);
1630 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1632 sinp = (struct sockaddr_in *)nam;
1633 if (nam->sa_family != AF_INET) {
1635 * Preserve compatibility with old programs.
1637 if (nam->sa_family != AF_UNSPEC ||
1638 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) ||
1639 sinp->sin_addr.s_addr != INADDR_ANY)
1640 return (EAFNOSUPPORT);
1641 nam->sa_family = AF_INET;
1643 if (nam->sa_len != sizeof(struct sockaddr_in))
1647 INP_HASH_WLOCK(pcbinfo);
1648 error = in_pcbbind(inp, nam, td->td_ucred);
1649 INP_HASH_WUNLOCK(pcbinfo);
1655 udp_close(struct socket *so)
1658 struct inpcbinfo *pcbinfo;
1660 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1661 inp = sotoinpcb(so);
1662 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1664 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1665 INP_HASH_WLOCK(pcbinfo);
1666 in_pcbdisconnect(inp);
1667 inp->inp_laddr.s_addr = INADDR_ANY;
1668 INP_HASH_WUNLOCK(pcbinfo);
1669 soisdisconnected(so);
1675 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1677 struct epoch_tracker et;
1679 struct inpcbinfo *pcbinfo;
1680 struct sockaddr_in *sin;
1683 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1684 inp = sotoinpcb(so);
1685 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1687 sin = (struct sockaddr_in *)nam;
1688 if (sin->sin_family != AF_INET)
1689 return (EAFNOSUPPORT);
1690 if (sin->sin_len != sizeof(*sin))
1694 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1698 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1703 NET_EPOCH_ENTER(et);
1704 INP_HASH_WLOCK(pcbinfo);
1705 error = in_pcbconnect(inp, nam, td->td_ucred);
1706 INP_HASH_WUNLOCK(pcbinfo);
1715 udp_detach(struct socket *so)
1718 struct inpcbinfo *pcbinfo;
1721 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1722 inp = sotoinpcb(so);
1723 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1724 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1725 ("udp_detach: not disconnected"));
1726 INP_INFO_WLOCK(pcbinfo);
1728 up = intoudpcb(inp);
1729 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1730 inp->inp_ppcb = NULL;
1733 INP_INFO_WUNLOCK(pcbinfo);
1738 udp_disconnect(struct socket *so)
1741 struct inpcbinfo *pcbinfo;
1743 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1744 inp = sotoinpcb(so);
1745 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1747 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1751 INP_HASH_WLOCK(pcbinfo);
1752 in_pcbdisconnect(inp);
1753 inp->inp_laddr.s_addr = INADDR_ANY;
1754 INP_HASH_WUNLOCK(pcbinfo);
1756 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1763 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1764 struct mbuf *control, struct thread *td)
1769 inp = sotoinpcb(so);
1770 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1774 if (addr->sa_family != AF_INET)
1775 error = EAFNOSUPPORT;
1776 else if (addr->sa_len != sizeof(struct sockaddr_in))
1778 if (__predict_false(error != 0)) {
1784 return (udp_output(inp, m, addr, control, td, flags));
1789 udp_shutdown(struct socket *so)
1793 inp = sotoinpcb(so);
1794 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1802 struct pr_usrreqs udp_usrreqs = {
1803 .pru_abort = udp_abort,
1804 .pru_attach = udp_attach,
1805 .pru_bind = udp_bind,
1806 .pru_connect = udp_connect,
1807 .pru_control = in_control,
1808 .pru_detach = udp_detach,
1809 .pru_disconnect = udp_disconnect,
1810 .pru_peeraddr = in_getpeeraddr,
1811 .pru_send = udp_send,
1812 .pru_soreceive = soreceive_dgram,
1813 .pru_sosend = sosend_dgram,
1814 .pru_shutdown = udp_shutdown,
1815 .pru_sockaddr = in_getsockaddr,
1816 .pru_sosetlabel = in_pcbsosetlabel,
1817 .pru_close = udp_close,