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");
130 VNET_DEFINE(bool, udp_blackhole_local) = false;
131 SYSCTL_BOOL(_net_inet_udp, OID_AUTO, blackhole_local, CTLFLAG_VNET |
132 CTLFLAG_RW, &VNET_NAME(udp_blackhole_local), false,
133 "Enforce net.inet.udp.blackhole for locally originated packets");
135 u_long udp_sendspace = 9216; /* really max datagram size */
136 SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
137 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
139 u_long udp_recvspace = 40 * (1024 +
141 sizeof(struct sockaddr_in6)
143 sizeof(struct sockaddr_in)
145 ); /* 40 1K datagrams */
147 SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
148 &udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
150 VNET_DEFINE(struct inpcbinfo, udbinfo);
151 VNET_DEFINE(struct inpcbinfo, ulitecbinfo);
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);
169 INPCBSTORAGE_DEFINE(udpcbstor, udpcb, "udpinp", "udp_inpcb", "udp", "udphash");
170 INPCBSTORAGE_DEFINE(udplitecbstor, udpcb, "udpliteinp", "udplite_inpcb",
171 "udplite", "udplitehash");
174 udp_vnet_init(void *arg __unused)
178 * For now default to 2-tuple UDP hashing - until the fragment
179 * reassembly code can also update the flowid.
181 * Once we can calculate the flowid that way and re-establish
182 * a 4-tuple, flip this to 4-tuple.
184 in_pcbinfo_init(&V_udbinfo, &udpcbstor, UDBHASHSIZE, UDBHASHSIZE);
185 /* Additional pcbinfo for UDP-Lite */
186 in_pcbinfo_init(&V_ulitecbinfo, &udplitecbstor, UDBHASHSIZE,
189 VNET_SYSINIT(udp_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
190 udp_vnet_init, NULL);
193 * Kernel module interface for updating udpstat. The argument is an index
194 * into udpstat treated as an array of u_long. While this encodes the
195 * general layout of udpstat into the caller, it doesn't encode its location,
196 * so that future changes to add, for example, per-CPU stats support won't
197 * cause binary compatibility problems for kernel modules.
200 kmod_udpstat_inc(int statnum)
203 counter_u64_add(VNET(udpstat)[statnum], 1);
208 udp_destroy(void *unused __unused)
211 in_pcbinfo_destroy(&V_udbinfo);
212 in_pcbinfo_destroy(&V_ulitecbinfo);
214 VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
219 * Subroutine of udp_input(), which appends the provided mbuf chain to the
220 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
221 * contains the source address. If the socket ends up being an IPv6 socket,
222 * udp_append() will convert to a sockaddr_in6 before passing the address
223 * into the socket code.
225 * In the normal case udp_append() will return 0, indicating that you
226 * must unlock the inp. However if a tunneling protocol is in place we increment
227 * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we
228 * then decrement the reference count. If the inp_rele returns 1, indicating the
229 * inp is gone, we return that to the caller to tell them *not* to unlock
230 * the inp. In the case of multi-cast this will cause the distribution
231 * to stop (though most tunneling protocols known currently do *not* use
235 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
236 struct sockaddr_in *udp_in)
238 struct sockaddr *append_sa;
240 struct mbuf *tmpopts, *opts = NULL;
242 struct sockaddr_in6 udp_in6;
247 INP_LOCK_ASSERT(inp);
250 * Engage the tunneling protocol.
253 if (up->u_tun_func != NULL) {
256 filtered = (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0],
260 return (in_pcbrele_rlocked(inp));
263 off += sizeof(struct udphdr);
265 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
266 /* Check AH/ESP integrity. */
267 if (IPSEC_ENABLED(ipv4) &&
268 IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) {
272 if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */
273 if (IPSEC_ENABLED(ipv4) &&
274 UDPENCAP_INPUT(n, off, AF_INET) != 0)
275 return (0); /* Consumed. */
279 if (mac_inpcb_check_deliver(inp, n) != 0) {
284 if (inp->inp_flags & INP_CONTROLOPTS ||
285 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
287 if (inp->inp_vflag & INP_IPV6)
288 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
291 ip_savecontrol(inp, &opts, ip, n);
293 if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
294 tmpopts = sbcreatecontrol(&udp_in[1],
295 sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP,
299 tmpopts->m_next = opts;
306 if (inp->inp_vflag & INP_IPV6) {
307 bzero(&udp_in6, sizeof(udp_in6));
308 udp_in6.sin6_len = sizeof(udp_in6);
309 udp_in6.sin6_family = AF_INET6;
310 in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6);
311 append_sa = (struct sockaddr *)&udp_in6;
314 append_sa = (struct sockaddr *)&udp_in[0];
317 so = inp->inp_socket;
318 SOCKBUF_LOCK(&so->so_rcv);
319 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
320 soroverflow_locked(so);
324 UDPSTAT_INC(udps_fullsock);
326 sorwakeup_locked(so);
331 udp_multi_match(const struct inpcb *inp, void *v)
334 struct udphdr *uh = (struct udphdr *)(ip + 1);
336 if (inp->inp_lport != uh->uh_dport)
339 if ((inp->inp_vflag & INP_IPV4) == 0)
342 if (inp->inp_laddr.s_addr != INADDR_ANY &&
343 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
345 if (inp->inp_faddr.s_addr != INADDR_ANY &&
346 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
348 if (inp->inp_fport != 0 &&
349 inp->inp_fport != uh->uh_sport)
356 udp_multi_input(struct mbuf *m, int proto, struct sockaddr_in *udp_in)
358 struct ip *ip = mtod(m, struct ip *);
359 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto),
360 INPLOOKUP_RLOCKPCB, udp_multi_match, ip);
362 struct udphdr *uh = (struct udphdr *)(ip + 1);
368 MPASS(ip->ip_hl == sizeof(struct ip) >> 2);
370 while ((inp = inp_next(&inpi)) != NULL) {
372 * XXXRW: Because we weren't holding either the inpcb
373 * or the hash lock when we checked for a match
374 * before, we should probably recheck now that the
375 * inpcb lock is held.
378 * Handle socket delivery policy for any-source
379 * and source-specific multicast. [RFC3678]
381 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
382 struct ip_moptions *imo;
383 struct sockaddr_in group;
386 imo = inp->inp_moptions;
389 bzero(&group, sizeof(struct sockaddr_in));
390 group.sin_len = sizeof(struct sockaddr_in);
391 group.sin_family = AF_INET;
392 group.sin_addr = ip->ip_dst;
394 blocked = imo_multi_filter(imo, m->m_pkthdr.rcvif,
395 (struct sockaddr *)&group,
396 (struct sockaddr *)&udp_in[0]);
397 if (blocked != MCAST_PASS) {
398 if (blocked == MCAST_NOTGMEMBER)
399 IPSTAT_INC(ips_notmember);
400 if (blocked == MCAST_NOTSMEMBER ||
401 blocked == MCAST_MUTED)
402 UDPSTAT_INC(udps_filtermcast);
406 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
407 if (proto == IPPROTO_UDPLITE)
408 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
410 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
411 if (udp_append(inp, ip, n, sizeof(struct ip), udp_in)) {
417 * Don't look for additional matches if this one does
418 * not have either the SO_REUSEPORT or SO_REUSEADDR
419 * socket options set. This heuristic avoids
420 * searching through all pcbs in the common case of a
421 * non-shared port. It assumes that an application
422 * will never clear these options after setting them.
424 if ((inp->inp_socket->so_options &
425 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) {
433 * No matching pcb found; discard datagram. (No need
434 * to send an ICMP Port Unreachable for a broadcast
435 * or multicast datgram.)
437 UDPSTAT_INC(udps_noport);
438 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)))
439 UDPSTAT_INC(udps_noportmcast);
441 UDPSTAT_INC(udps_noportbcast);
445 return (IPPROTO_DONE);
449 udp_input(struct mbuf **mp, int *offp, int proto)
455 uint16_t len, ip_len;
456 struct inpcbinfo *pcbinfo;
457 struct sockaddr_in udp_in[2];
459 struct m_tag *fwd_tag;
460 int cscov_partial, iphlen;
464 ifp = m->m_pkthdr.rcvif;
466 UDPSTAT_INC(udps_ipackets);
469 * Strip IP options, if any; should skip this, make available to
470 * user, and use on returned packets, but we don't yet have a way to
471 * check the checksum with options still present.
473 if (iphlen > sizeof (struct ip)) {
475 iphlen = sizeof(struct ip);
479 * Get IP and UDP header together in first mbuf.
481 if (m->m_len < iphlen + sizeof(struct udphdr)) {
482 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) {
483 UDPSTAT_INC(udps_hdrops);
484 return (IPPROTO_DONE);
487 ip = mtod(m, struct ip *);
488 uh = (struct udphdr *)((caddr_t)ip + iphlen);
489 cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0;
492 * Destination port of 0 is illegal, based on RFC768.
494 if (uh->uh_dport == 0)
498 * Construct sockaddr format source address. Stuff source address
499 * and datagram in user buffer.
501 bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2);
502 udp_in[0].sin_len = sizeof(struct sockaddr_in);
503 udp_in[0].sin_family = AF_INET;
504 udp_in[0].sin_port = uh->uh_sport;
505 udp_in[0].sin_addr = ip->ip_src;
506 udp_in[1].sin_len = sizeof(struct sockaddr_in);
507 udp_in[1].sin_family = AF_INET;
508 udp_in[1].sin_port = uh->uh_dport;
509 udp_in[1].sin_addr = ip->ip_dst;
512 * Make mbuf data length reflect UDP length. If not enough data to
513 * reflect UDP length, drop.
515 len = ntohs((u_short)uh->uh_ulen);
516 ip_len = ntohs(ip->ip_len) - iphlen;
517 if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) {
518 /* Zero means checksum over the complete packet. */
524 if (len > ip_len || len < sizeof(struct udphdr)) {
525 UDPSTAT_INC(udps_badlen);
528 if (proto == IPPROTO_UDP)
529 m_adj(m, len - ip_len);
533 * Checksum extended UDP header and data.
538 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
540 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
541 uh_sum = m->m_pkthdr.csum_data;
543 uh_sum = in_pseudo(ip->ip_src.s_addr,
544 ip->ip_dst.s_addr, htonl((u_short)len +
545 m->m_pkthdr.csum_data + proto));
548 char b[offsetof(struct ipovly, ih_src)];
549 struct ipovly *ipov = (struct ipovly *)ip;
551 bcopy(ipov, b, sizeof(b));
552 bzero(ipov, sizeof(ipov->ih_x1));
553 ipov->ih_len = (proto == IPPROTO_UDP) ?
554 uh->uh_ulen : htons(ip_len);
555 uh_sum = in_cksum(m, len + sizeof (struct ip));
556 bcopy(b, ipov, sizeof(b));
559 UDPSTAT_INC(udps_badsum);
561 return (IPPROTO_DONE);
564 if (proto == IPPROTO_UDP) {
565 UDPSTAT_INC(udps_nosum);
567 /* UDPLite requires a checksum */
568 /* XXX: What is the right UDPLite MIB counter here? */
570 return (IPPROTO_DONE);
574 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
575 in_broadcast(ip->ip_dst, ifp))
576 return (udp_multi_input(m, proto, udp_in));
578 pcbinfo = udp_get_inpcbinfo(proto);
581 * Locate pcb for datagram.
583 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
585 if ((m->m_flags & M_IP_NEXTHOP) &&
586 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
587 struct sockaddr_in *next_hop;
589 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
592 * Transparently forwarded. Pretend to be the destination.
593 * Already got one like this?
595 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
596 ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
599 * It's new. Try to find the ambushing socket.
600 * Because we've rewritten the destination address,
601 * any hardware-generated hash is ignored.
603 inp = in_pcblookup(pcbinfo, ip->ip_src,
604 uh->uh_sport, next_hop->sin_addr,
605 next_hop->sin_port ? htons(next_hop->sin_port) :
606 uh->uh_dport, INPLOOKUP_WILDCARD |
607 INPLOOKUP_RLOCKPCB, ifp);
609 /* Remove the tag from the packet. We don't need it anymore. */
610 m_tag_delete(m, fwd_tag);
611 m->m_flags &= ~M_IP_NEXTHOP;
613 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
614 ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
615 INPLOOKUP_RLOCKPCB, ifp, m);
617 if (V_udp_log_in_vain) {
618 char src[INET_ADDRSTRLEN];
619 char dst[INET_ADDRSTRLEN];
622 "Connection attempt to UDP %s:%d from %s:%d\n",
623 inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport),
624 inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport));
626 if (proto == IPPROTO_UDPLITE)
627 UDPLITE_PROBE(receive, NULL, NULL, ip, NULL, uh);
629 UDP_PROBE(receive, NULL, NULL, ip, NULL, uh);
630 UDPSTAT_INC(udps_noport);
631 if (m->m_flags & (M_BCAST | M_MCAST)) {
632 UDPSTAT_INC(udps_noportbcast);
635 if (V_udp_blackhole && (V_udp_blackhole_local ||
636 !in_localip(ip->ip_src)))
638 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
640 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
641 return (IPPROTO_DONE);
645 * Check the minimum TTL for socket.
647 INP_RLOCK_ASSERT(inp);
648 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
649 if (proto == IPPROTO_UDPLITE)
650 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
652 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
655 return (IPPROTO_DONE);
661 if (up->u_rxcslen == 0 || up->u_rxcslen > len) {
664 return (IPPROTO_DONE);
668 if (proto == IPPROTO_UDPLITE)
669 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
671 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
672 if (udp_append(inp, ip, m, iphlen, udp_in) == 0)
674 return (IPPROTO_DONE);
678 return (IPPROTO_DONE);
683 * Notify a udp user of an asynchronous error; just wake up so that they can
684 * collect error status.
687 udp_notify(struct inpcb *inp, int errno)
690 INP_WLOCK_ASSERT(inp);
691 if ((errno == EHOSTUNREACH || errno == ENETUNREACH ||
692 errno == EHOSTDOWN) && inp->inp_route.ro_nh) {
693 NH_FREE(inp->inp_route.ro_nh);
694 inp->inp_route.ro_nh = (struct nhop_object *)NULL;
697 inp->inp_socket->so_error = errno;
698 sorwakeup(inp->inp_socket);
699 sowwakeup(inp->inp_socket);
705 udp_common_ctlinput(struct icmp *icmp, struct inpcbinfo *pcbinfo)
707 struct ip *ip = &icmp->icmp_ip;
711 if (icmp_errmap(icmp) == 0)
714 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
715 inp = in_pcblookup(pcbinfo, ip->ip_dst, uh->uh_dport, ip->ip_src,
716 uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL);
718 INP_WLOCK_ASSERT(inp);
719 if (inp->inp_socket != NULL)
720 udp_notify(inp, icmp_errmap(icmp));
723 inp = in_pcblookup(pcbinfo, ip->ip_dst, uh->uh_dport,
724 ip->ip_src, uh->uh_sport,
725 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
728 udp_tun_icmp_t *func;
731 func = up->u_icmp_func;
740 udp_ctlinput(struct icmp *icmp)
743 return (udp_common_ctlinput(icmp, &V_udbinfo));
747 udplite_ctlinput(struct icmp *icmp)
750 return (udp_common_ctlinput(icmp, &V_ulitecbinfo));
755 udp_pcblist(SYSCTL_HANDLER_ARGS)
757 struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_udbinfo,
763 if (req->newptr != 0)
766 if (req->oldptr == 0) {
769 n = V_udbinfo.ipi_count;
770 n += imax(n / 8, 10);
771 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
775 if ((error = sysctl_wire_old_buffer(req, 0)) != 0)
778 bzero(&xig, sizeof(xig));
779 xig.xig_len = sizeof xig;
780 xig.xig_count = V_udbinfo.ipi_count;
781 xig.xig_gen = V_udbinfo.ipi_gencnt;
782 xig.xig_sogen = so_gencnt;
783 error = SYSCTL_OUT(req, &xig, sizeof xig);
787 while ((inp = inp_next(&inpi)) != NULL) {
788 if (inp->inp_gencnt <= xig.xig_gen &&
789 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
792 in_pcbtoxinpcb(inp, &xi);
793 error = SYSCTL_OUT(req, &xi, sizeof xi);
803 * Give the user an updated idea of our state. If the
804 * generation differs from what we told her before, she knows
805 * that something happened while we were processing this
806 * request, and it might be necessary to retry.
808 xig.xig_gen = V_udbinfo.ipi_gencnt;
809 xig.xig_sogen = so_gencnt;
810 xig.xig_count = V_udbinfo.ipi_count;
811 error = SYSCTL_OUT(req, &xig, sizeof xig);
817 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist,
818 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
819 udp_pcblist, "S,xinpcb",
820 "List of active UDP sockets");
824 udp_getcred(SYSCTL_HANDLER_ARGS)
827 struct sockaddr_in addrs[2];
828 struct epoch_tracker et;
832 error = priv_check(req->td, PRIV_NETINET_GETCRED);
835 error = SYSCTL_IN(req, addrs, sizeof(addrs));
839 inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
840 addrs[0].sin_addr, addrs[0].sin_port,
841 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
844 INP_RLOCK_ASSERT(inp);
845 if (inp->inp_socket == NULL)
848 error = cr_canseeinpcb(req->td->td_ucred, inp);
850 cru2x(inp->inp_cred, &xuc);
855 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
859 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
860 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
861 0, 0, udp_getcred, "S,xucred",
862 "Get the xucred of a UDP connection");
866 udp_ctloutput(struct socket *so, struct sockopt *sopt)
870 int isudplite, error, optval;
873 isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0;
875 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
877 if (sopt->sopt_level != so->so_proto->pr_protocol) {
879 if (INP_CHECK_SOCKAF(so, AF_INET6)) {
881 error = ip6_ctloutput(so, sopt);
884 #if defined(INET) && defined(INET6)
890 error = ip_ctloutput(so, sopt);
896 switch (sopt->sopt_dir) {
898 switch (sopt->sopt_name) {
899 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
902 if (!IPSEC_ENABLED(ipv4)) {
904 return (ENOPROTOOPT);
906 error = UDPENCAP_PCBCTL(inp, sopt);
910 case UDPLITE_SEND_CSCOV:
911 case UDPLITE_RECV_CSCOV:
918 error = sooptcopyin(sopt, &optval, sizeof(optval),
923 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
926 KASSERT(up != NULL, ("%s: up == NULL", __func__));
927 if ((optval != 0 && optval < 8) || (optval > 65535)) {
932 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
933 up->u_txcslen = optval;
935 up->u_rxcslen = optval;
945 switch (sopt->sopt_name) {
946 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
949 if (!IPSEC_ENABLED(ipv4)) {
951 return (ENOPROTOOPT);
953 error = UDPENCAP_PCBCTL(inp, sopt);
957 case UDPLITE_SEND_CSCOV:
958 case UDPLITE_RECV_CSCOV:
965 KASSERT(up != NULL, ("%s: up == NULL", __func__));
966 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
967 optval = up->u_txcslen;
969 optval = up->u_rxcslen;
971 error = sooptcopyout(sopt, &optval, sizeof(optval));
985 /* The logic here is derived from ip6_setpktopt(). See comments there. */
987 udp_v4mapped_pktinfo(struct cmsghdr *cm, struct sockaddr_in * src,
988 struct inpcb *inp, int flags)
991 struct in6_pktinfo *pktinfo;
994 if ((flags & PRUS_IPV6) == 0)
997 if (cm->cmsg_level != IPPROTO_IPV6)
1000 if (cm->cmsg_type != IPV6_2292PKTINFO &&
1001 cm->cmsg_type != IPV6_PKTINFO)
1005 CMSG_LEN(sizeof(struct in6_pktinfo)))
1008 pktinfo = (struct in6_pktinfo *)CMSG_DATA(cm);
1009 if (!IN6_IS_ADDR_V4MAPPED(&pktinfo->ipi6_addr) &&
1010 !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr))
1013 /* Validate the interface index if specified. */
1014 if (pktinfo->ipi6_ifindex) {
1015 struct epoch_tracker et;
1017 NET_EPOCH_ENTER(et);
1018 ifp = ifnet_byindex(pktinfo->ipi6_ifindex);
1019 NET_EPOCH_EXIT(et); /* XXXGL: unsafe ifp */
1024 if (ifp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
1025 ia.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1026 if (in_ifhasaddr(ifp, ia) == 0)
1027 return (EADDRNOTAVAIL);
1030 bzero(src, sizeof(*src));
1031 src->sin_family = AF_INET;
1032 src->sin_len = sizeof(*src);
1033 src->sin_port = inp->inp_lport;
1034 src->sin_addr.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1041 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1042 struct mbuf *control, struct thread *td)
1045 struct udpiphdr *ui;
1047 struct in_addr faddr, laddr;
1049 struct inpcbinfo *pcbinfo;
1050 struct sockaddr_in *sin, src;
1051 struct epoch_tracker et;
1052 int cscov_partial = 0;
1054 u_short fport, lport;
1058 uint32_t flowid = 0;
1059 uint8_t flowtype = M_HASHTYPE_NONE;
1061 inp = sotoinpcb(so);
1062 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1065 if (addr->sa_family != AF_INET)
1066 error = EAFNOSUPPORT;
1067 else if (addr->sa_len != sizeof(struct sockaddr_in))
1069 if (__predict_false(error != 0)) {
1076 len = m->m_pkthdr.len;
1077 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1085 sin = (struct sockaddr_in *)addr;
1088 * udp_send() may need to temporarily bind or connect the current
1089 * inpcb. As such, we don't know up front whether we will need the
1090 * pcbinfo lock or not. Do any work to decide what is needed up
1091 * front before acquiring any locks.
1093 * We will need network epoch in either case, to safely lookup into
1097 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0))
1101 NET_EPOCH_ENTER(et);
1102 tos = inp->inp_ip_tos;
1103 if (control != NULL) {
1105 * XXX: Currently, we assume all the optional information is
1106 * stored in a single mbuf.
1108 if (control->m_next) {
1113 for (; control->m_len > 0;
1114 control->m_data += CMSG_ALIGN(cm->cmsg_len),
1115 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
1116 cm = mtod(control, struct cmsghdr *);
1117 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
1118 || cm->cmsg_len > control->m_len) {
1123 error = udp_v4mapped_pktinfo(cm, &src, inp, flags);
1127 if (cm->cmsg_level != IPPROTO_IP)
1130 switch (cm->cmsg_type) {
1131 case IP_SENDSRCADDR:
1133 CMSG_LEN(sizeof(struct in_addr))) {
1137 bzero(&src, sizeof(src));
1138 src.sin_family = AF_INET;
1139 src.sin_len = sizeof(src);
1140 src.sin_port = inp->inp_lport;
1142 *(struct in_addr *)CMSG_DATA(cm);
1146 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
1150 tos = *(u_char *)CMSG_DATA(cm);
1154 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1158 flowid = *(uint32_t *) CMSG_DATA(cm);
1162 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1166 flowtype = *(uint32_t *) CMSG_DATA(cm);
1170 case IP_RSSBUCKETID:
1171 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1175 /* This is just a placeholder for now */
1179 error = ENOPROTOOPT;
1191 pr = inp->inp_socket->so_proto->pr_protocol;
1192 pcbinfo = udp_get_inpcbinfo(pr);
1195 * If the IP_SENDSRCADDR control message was specified, override the
1196 * source address for this datagram. Its use is invalidated if the
1197 * address thus specified is incomplete or clobbers other inpcbs.
1199 laddr = inp->inp_laddr;
1200 lport = inp->inp_lport;
1201 if (src.sin_family == AF_INET) {
1203 (laddr.s_addr == INADDR_ANY &&
1204 src.sin_addr.s_addr == INADDR_ANY)) {
1208 INP_HASH_WLOCK(pcbinfo);
1209 error = in_pcbbind_setup(inp, &src, &laddr.s_addr, &lport,
1211 INP_HASH_WUNLOCK(pcbinfo);
1217 * If a UDP socket has been connected, then a local address/port will
1218 * have been selected and bound.
1220 * If a UDP socket has not been connected to, then an explicit
1221 * destination address must be used, in which case a local
1222 * address/port may not have been selected and bound.
1225 INP_LOCK_ASSERT(inp);
1226 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1232 * Jail may rewrite the destination address, so let it do
1233 * that before we use it.
1235 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1240 * If a local address or port hasn't yet been selected, or if
1241 * the destination address needs to be rewritten due to using
1242 * a special INADDR_ constant, invoke in_pcbconnect_setup()
1243 * to do the heavy lifting. Once a port is selected, we
1244 * commit the binding back to the socket; we also commit the
1245 * binding of the address if in jail.
1247 * If we already have a valid binding and we're not
1248 * requesting a destination address rewrite, use a fast path.
1250 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1251 inp->inp_lport == 0 ||
1252 sin->sin_addr.s_addr == INADDR_ANY ||
1253 sin->sin_addr.s_addr == INADDR_BROADCAST) {
1254 INP_HASH_WLOCK(pcbinfo);
1255 error = in_pcbconnect_setup(inp, sin, &laddr.s_addr,
1256 &lport, &faddr.s_addr, &fport, td->td_ucred);
1258 INP_HASH_WUNLOCK(pcbinfo);
1263 * XXXRW: Why not commit the port if the address is
1266 /* Commit the local port if newly assigned. */
1267 if (inp->inp_laddr.s_addr == INADDR_ANY &&
1268 inp->inp_lport == 0) {
1269 INP_WLOCK_ASSERT(inp);
1271 * Remember addr if jailed, to prevent
1274 if (prison_flag(td->td_ucred, PR_IP4))
1275 inp->inp_laddr = laddr;
1276 inp->inp_lport = lport;
1277 error = in_pcbinshash(inp);
1278 INP_HASH_WUNLOCK(pcbinfo);
1284 inp->inp_flags |= INP_ANONPORT;
1286 INP_HASH_WUNLOCK(pcbinfo);
1288 faddr = sin->sin_addr;
1289 fport = sin->sin_port;
1292 INP_LOCK_ASSERT(inp);
1293 faddr = inp->inp_faddr;
1294 fport = inp->inp_fport;
1295 if (faddr.s_addr == INADDR_ANY) {
1302 * Calculate data length and get a mbuf for UDP, IP, and possible
1303 * link-layer headers. Immediate slide the data pointer back forward
1304 * since we won't use that space at this layer.
1306 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT);
1311 m->m_data += max_linkhdr;
1312 m->m_len -= max_linkhdr;
1313 m->m_pkthdr.len -= max_linkhdr;
1316 * Fill in mbuf with extended UDP header and addresses and length put
1317 * into network format.
1319 ui = mtod(m, struct udpiphdr *);
1320 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1321 ui->ui_v = IPVERSION << 4;
1325 ui->ui_sport = lport;
1326 ui->ui_dport = fport;
1327 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1328 if (pr == IPPROTO_UDPLITE) {
1332 up = intoudpcb(inp);
1333 cscov = up->u_txcslen;
1334 plen = (u_short)len + sizeof(struct udphdr);
1337 ui->ui_len = htons(plen);
1338 ui->ui_ulen = htons(cscov);
1340 * For UDP-Lite, checksum coverage length of zero means
1341 * the entire UDPLite packet is covered by the checksum.
1343 cscov_partial = (cscov == 0) ? 0 : 1;
1347 * Set the Don't Fragment bit in the IP header.
1349 if (inp->inp_flags & INP_DONTFRAG) {
1352 ip = (struct ip *)&ui->ui_i;
1353 ip->ip_off |= htons(IP_DF);
1356 if (inp->inp_socket->so_options & SO_DONTROUTE)
1357 ipflags |= IP_ROUTETOIF;
1358 if (inp->inp_socket->so_options & SO_BROADCAST)
1359 ipflags |= IP_ALLOWBROADCAST;
1360 if (inp->inp_flags & INP_ONESBCAST)
1361 ipflags |= IP_SENDONES;
1364 mac_inpcb_create_mbuf(inp, m);
1368 * Set up checksum and output datagram.
1371 if (pr == IPPROTO_UDPLITE) {
1372 if (inp->inp_flags & INP_ONESBCAST)
1373 faddr.s_addr = INADDR_BROADCAST;
1374 if (cscov_partial) {
1375 if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
1376 ui->ui_sum = 0xffff;
1378 if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0)
1379 ui->ui_sum = 0xffff;
1381 } else if (V_udp_cksum) {
1382 if (inp->inp_flags & INP_ONESBCAST)
1383 faddr.s_addr = INADDR_BROADCAST;
1384 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1385 htons((u_short)len + sizeof(struct udphdr) + pr));
1386 m->m_pkthdr.csum_flags = CSUM_UDP;
1387 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1389 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len);
1390 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1391 ((struct ip *)ui)->ip_tos = tos; /* XXX */
1392 UDPSTAT_INC(udps_opackets);
1395 * Setup flowid / RSS information for outbound socket.
1397 * Once the UDP code decides to set a flowid some other way,
1398 * this allows the flowid to be overridden by userland.
1400 if (flowtype != M_HASHTYPE_NONE) {
1401 m->m_pkthdr.flowid = flowid;
1402 M_HASHTYPE_SET(m, flowtype);
1404 #if defined(ROUTE_MPATH) || defined(RSS)
1405 else if (CALC_FLOWID_OUTBOUND_SENDTO) {
1406 uint32_t hash_val, hash_type;
1408 hash_val = fib4_calc_packet_hash(laddr, faddr,
1409 lport, fport, pr, &hash_type);
1410 m->m_pkthdr.flowid = hash_val;
1411 M_HASHTYPE_SET(m, hash_type);
1415 * Don't override with the inp cached flowid value.
1417 * Depending upon the kind of send being done, the inp
1418 * flowid/flowtype values may actually not be appropriate
1419 * for this particular socket send.
1421 * We should either leave the flowid at zero (which is what is
1422 * currently done) or set it to some software generated
1423 * hash value based on the packet contents.
1425 ipflags |= IP_NODEFAULTFLOWID;
1428 if (pr == IPPROTO_UDPLITE)
1429 UDPLITE_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1431 UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1432 error = ip_output(m, inp->inp_options,
1433 INP_WLOCKED(inp) ? &inp->inp_route : NULL, ipflags,
1434 inp->inp_moptions, inp);
1447 udp_abort(struct socket *so)
1450 struct inpcbinfo *pcbinfo;
1452 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1453 inp = sotoinpcb(so);
1454 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1456 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1457 INP_HASH_WLOCK(pcbinfo);
1458 in_pcbdisconnect(inp);
1459 INP_HASH_WUNLOCK(pcbinfo);
1460 soisdisconnected(so);
1466 udp_attach(struct socket *so, int proto, struct thread *td)
1468 static uint32_t udp_flowid;
1469 struct inpcbinfo *pcbinfo;
1474 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1475 inp = sotoinpcb(so);
1476 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1477 error = soreserve(so, udp_sendspace, udp_recvspace);
1480 error = in_pcballoc(so, pcbinfo);
1484 inp = sotoinpcb(so);
1485 inp->inp_ip_ttl = V_ip_defttl;
1486 inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1);
1487 inp->inp_flowtype = M_HASHTYPE_OPAQUE;
1488 up = intoudpcb(inp);
1489 bzero(&up->u_start_zero, u_zero_size);
1497 udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx)
1502 KASSERT(so->so_type == SOCK_DGRAM,
1503 ("udp_set_kernel_tunneling: !dgram"));
1504 inp = sotoinpcb(so);
1505 KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL"));
1507 up = intoudpcb(inp);
1508 if ((f != NULL || i != NULL) && ((up->u_tun_func != NULL) ||
1509 (up->u_icmp_func != NULL))) {
1514 up->u_icmp_func = i;
1515 up->u_tun_ctx = ctx;
1522 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1525 struct inpcbinfo *pcbinfo;
1526 struct sockaddr_in *sinp;
1529 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1530 inp = sotoinpcb(so);
1531 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1533 sinp = (struct sockaddr_in *)nam;
1534 if (nam->sa_family != AF_INET) {
1536 * Preserve compatibility with old programs.
1538 if (nam->sa_family != AF_UNSPEC ||
1539 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) ||
1540 sinp->sin_addr.s_addr != INADDR_ANY)
1541 return (EAFNOSUPPORT);
1542 nam->sa_family = AF_INET;
1544 if (nam->sa_len != sizeof(struct sockaddr_in))
1548 INP_HASH_WLOCK(pcbinfo);
1549 error = in_pcbbind(inp, sinp, td->td_ucred);
1550 INP_HASH_WUNLOCK(pcbinfo);
1556 udp_close(struct socket *so)
1559 struct inpcbinfo *pcbinfo;
1561 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1562 inp = sotoinpcb(so);
1563 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1565 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1566 INP_HASH_WLOCK(pcbinfo);
1567 in_pcbdisconnect(inp);
1568 INP_HASH_WUNLOCK(pcbinfo);
1569 soisdisconnected(so);
1575 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1577 struct epoch_tracker et;
1579 struct inpcbinfo *pcbinfo;
1580 struct sockaddr_in *sin;
1583 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1584 inp = sotoinpcb(so);
1585 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1587 sin = (struct sockaddr_in *)nam;
1588 if (sin->sin_family != AF_INET)
1589 return (EAFNOSUPPORT);
1590 if (sin->sin_len != sizeof(*sin))
1594 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1598 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1603 NET_EPOCH_ENTER(et);
1604 INP_HASH_WLOCK(pcbinfo);
1605 error = in_pcbconnect(inp, sin, td->td_ucred, true);
1606 INP_HASH_WUNLOCK(pcbinfo);
1615 udp_detach(struct socket *so)
1619 inp = sotoinpcb(so);
1620 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1621 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1622 ("udp_detach: not disconnected"));
1629 udp_disconnect(struct socket *so)
1632 struct inpcbinfo *pcbinfo;
1634 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1635 inp = sotoinpcb(so);
1636 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1638 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1642 INP_HASH_WLOCK(pcbinfo);
1643 in_pcbdisconnect(inp);
1644 INP_HASH_WUNLOCK(pcbinfo);
1646 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1654 udp_shutdown(struct socket *so)
1658 inp = sotoinpcb(so);
1659 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1667 #define UDP_PROTOSW \
1668 .pr_type = SOCK_DGRAM, \
1669 .pr_flags = PR_ATOMIC | PR_ADDR | PR_CAPATTACH, \
1670 .pr_ctloutput = udp_ctloutput, \
1671 .pr_abort = udp_abort, \
1672 .pr_attach = udp_attach, \
1673 .pr_bind = udp_bind, \
1674 .pr_connect = udp_connect, \
1675 .pr_control = in_control, \
1676 .pr_detach = udp_detach, \
1677 .pr_disconnect = udp_disconnect, \
1678 .pr_peeraddr = in_getpeeraddr, \
1679 .pr_send = udp_send, \
1680 .pr_soreceive = soreceive_dgram, \
1681 .pr_sosend = sosend_dgram, \
1682 .pr_shutdown = udp_shutdown, \
1683 .pr_sockaddr = in_getsockaddr, \
1684 .pr_sosetlabel = in_pcbsosetlabel, \
1685 .pr_close = udp_close
1687 struct protosw udp_protosw = {
1688 .pr_protocol = IPPROTO_UDP,
1692 struct protosw udplite_protosw = {
1693 .pr_protocol = IPPROTO_UDPLITE,
1698 udp_init(void *arg __unused)
1701 IPPROTO_REGISTER(IPPROTO_UDP, udp_input, udp_ctlinput);
1702 IPPROTO_REGISTER(IPPROTO_UDPLITE, udp_input, udplite_ctlinput);
1704 SYSINIT(udp_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp_init, NULL);