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"
49 #include <sys/param.h>
50 #include <sys/domain.h>
51 #include <sys/eventhandler.h>
53 #include <sys/kernel.h>
55 #include <sys/malloc.h>
59 #include <sys/protosw.h>
61 #include <sys/signalvar.h>
62 #include <sys/socket.h>
63 #include <sys/socketvar.h>
65 #include <sys/sysctl.h>
66 #include <sys/syslog.h>
67 #include <sys/systm.h>
72 #include <net/if_var.h>
73 #include <net/route.h>
74 #include <net/rss_config.h>
76 #include <netinet/in.h>
77 #include <netinet/in_kdtrace.h>
78 #include <netinet/in_pcb.h>
79 #include <netinet/in_systm.h>
80 #include <netinet/in_var.h>
81 #include <netinet/ip.h>
83 #include <netinet/ip6.h>
85 #include <netinet/ip_icmp.h>
86 #include <netinet/icmp_var.h>
87 #include <netinet/ip_var.h>
88 #include <netinet/ip_options.h>
90 #include <netinet6/ip6_var.h>
92 #include <netinet/udp.h>
93 #include <netinet/udp_var.h>
94 #include <netinet/udplite.h>
95 #include <netinet/in_rss.h>
97 #include <netipsec/ipsec_support.h>
99 #include <machine/in_cksum.h>
101 #include <security/mac/mac_framework.h>
104 * UDP and UDP-Lite protocols implementation.
105 * Per RFC 768, August, 1980.
106 * Per RFC 3828, July, 2004.
110 * BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
111 * removes the only data integrity mechanism for packets and malformed
112 * packets that would otherwise be discarded due to bad checksums, and may
113 * cause problems (especially for NFS data blocks).
115 VNET_DEFINE(int, udp_cksum) = 1;
116 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_VNET | CTLFLAG_RW,
117 &VNET_NAME(udp_cksum), 0, "compute udp checksum");
119 VNET_DEFINE(int, udp_log_in_vain) = 0;
120 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_VNET | CTLFLAG_RW,
121 &VNET_NAME(udp_log_in_vain), 0, "Log all incoming UDP packets");
123 VNET_DEFINE(int, udp_blackhole) = 0;
124 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_VNET | CTLFLAG_RW,
125 &VNET_NAME(udp_blackhole), 0,
126 "Do not send port unreachables for refused connects");
128 u_long udp_sendspace = 9216; /* really max datagram size */
129 SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
130 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
132 u_long udp_recvspace = 40 * (1024 +
134 sizeof(struct sockaddr_in6)
136 sizeof(struct sockaddr_in)
138 ); /* 40 1K datagrams */
140 SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
141 &udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
143 VNET_DEFINE(struct inpcbhead, udb); /* from udp_var.h */
144 VNET_DEFINE(struct inpcbinfo, udbinfo);
145 VNET_DEFINE(struct inpcbhead, ulitecb);
146 VNET_DEFINE(struct inpcbinfo, ulitecbinfo);
147 VNET_DEFINE_STATIC(uma_zone_t, udpcb_zone);
148 #define V_udpcb_zone VNET(udpcb_zone)
151 #define UDBHASHSIZE 128
154 VNET_PCPUSTAT_DEFINE(struct udpstat, udpstat); /* from udp_var.h */
155 VNET_PCPUSTAT_SYSINIT(udpstat);
156 SYSCTL_VNET_PCPUSTAT(_net_inet_udp, UDPCTL_STATS, stats, struct udpstat,
157 udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
160 VNET_PCPUSTAT_SYSUNINIT(udpstat);
163 static void udp_detach(struct socket *so);
164 static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
165 struct mbuf *, struct thread *);
169 udp_zone_change(void *tag)
172 uma_zone_set_max(V_udbinfo.ipi_zone, maxsockets);
173 uma_zone_set_max(V_udpcb_zone, maxsockets);
177 udp_inpcb_init(void *mem, int size, int flags)
182 INP_LOCK_INIT(inp, "inp", "udpinp");
187 udplite_inpcb_init(void *mem, int size, int flags)
192 INP_LOCK_INIT(inp, "inp", "udpliteinp");
201 * For now default to 2-tuple UDP hashing - until the fragment
202 * reassembly code can also update the flowid.
204 * Once we can calculate the flowid that way and re-establish
205 * a 4-tuple, flip this to 4-tuple.
207 in_pcbinfo_init(&V_udbinfo, "udp", &V_udb, UDBHASHSIZE, UDBHASHSIZE,
208 "udp_inpcb", udp_inpcb_init, IPI_HASHFIELDS_2TUPLE);
209 V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
210 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
211 uma_zone_set_max(V_udpcb_zone, maxsockets);
212 uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached");
213 EVENTHANDLER_REGISTER(maxsockets_change, udp_zone_change, NULL,
214 EVENTHANDLER_PRI_ANY);
221 in_pcbinfo_init(&V_ulitecbinfo, "udplite", &V_ulitecb, UDBHASHSIZE,
222 UDBHASHSIZE, "udplite_inpcb", udplite_inpcb_init,
223 IPI_HASHFIELDS_2TUPLE);
227 * Kernel module interface for updating udpstat. The argument is an index
228 * into udpstat treated as an array of u_long. While this encodes the
229 * general layout of udpstat into the caller, it doesn't encode its location,
230 * so that future changes to add, for example, per-CPU stats support won't
231 * cause binary compatibility problems for kernel modules.
234 kmod_udpstat_inc(int statnum)
237 counter_u64_add(VNET(udpstat)[statnum], 1);
241 udp_newudpcb(struct inpcb *inp)
245 up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO);
253 udp_discardcb(struct udpcb *up)
256 uma_zfree(V_udpcb_zone, up);
261 udp_destroy(void *unused __unused)
264 in_pcbinfo_destroy(&V_udbinfo);
265 uma_zdestroy(V_udpcb_zone);
267 VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
270 udplite_destroy(void *unused __unused)
273 in_pcbinfo_destroy(&V_ulitecbinfo);
275 VNET_SYSUNINIT(udplite, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udplite_destroy,
281 * Subroutine of udp_input(), which appends the provided mbuf chain to the
282 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
283 * contains the source address. If the socket ends up being an IPv6 socket,
284 * udp_append() will convert to a sockaddr_in6 before passing the address
285 * into the socket code.
287 * In the normal case udp_append() will return 0, indicating that you
288 * must unlock the inp. However if a tunneling protocol is in place we increment
289 * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we
290 * then decrement the reference count. If the inp_rele returns 1, indicating the
291 * inp is gone, we return that to the caller to tell them *not* to unlock
292 * the inp. In the case of multi-cast this will cause the distribution
293 * to stop (though most tunneling protocols known currently do *not* use
297 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
298 struct sockaddr_in *udp_in)
300 struct sockaddr *append_sa;
302 struct mbuf *tmpopts, *opts = NULL;
304 struct sockaddr_in6 udp_in6;
308 INP_LOCK_ASSERT(inp);
311 * Engage the tunneling protocol.
314 if (up->u_tun_func != NULL) {
317 (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0],
320 return (in_pcbrele_rlocked(inp));
323 off += sizeof(struct udphdr);
325 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
326 /* Check AH/ESP integrity. */
327 if (IPSEC_ENABLED(ipv4) &&
328 IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) {
332 if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */
333 if (IPSEC_ENABLED(ipv4) &&
334 UDPENCAP_INPUT(n, off, AF_INET) != 0)
335 return (0); /* Consumed. */
339 if (mac_inpcb_check_deliver(inp, n) != 0) {
344 if (inp->inp_flags & INP_CONTROLOPTS ||
345 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
347 if (inp->inp_vflag & INP_IPV6)
348 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
351 ip_savecontrol(inp, &opts, ip, n);
353 if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
354 tmpopts = sbcreatecontrol((caddr_t)&udp_in[1],
355 sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP);
358 tmpopts->m_next = opts;
365 if (inp->inp_vflag & INP_IPV6) {
366 bzero(&udp_in6, sizeof(udp_in6));
367 udp_in6.sin6_len = sizeof(udp_in6);
368 udp_in6.sin6_family = AF_INET6;
369 in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6);
370 append_sa = (struct sockaddr *)&udp_in6;
373 append_sa = (struct sockaddr *)&udp_in[0];
376 so = inp->inp_socket;
377 SOCKBUF_LOCK(&so->so_rcv);
378 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
379 SOCKBUF_UNLOCK(&so->so_rcv);
383 UDPSTAT_INC(udps_fullsock);
385 sorwakeup_locked(so);
390 udp_input(struct mbuf **mp, int *offp, int proto)
396 uint16_t len, ip_len;
397 struct inpcbinfo *pcbinfo;
399 struct sockaddr_in udp_in[2];
401 struct m_tag *fwd_tag;
402 int cscov_partial, iphlen;
406 ifp = m->m_pkthdr.rcvif;
408 UDPSTAT_INC(udps_ipackets);
411 * Strip IP options, if any; should skip this, make available to
412 * user, and use on returned packets, but we don't yet have a way to
413 * check the checksum with options still present.
415 if (iphlen > sizeof (struct ip)) {
417 iphlen = sizeof(struct ip);
421 * Get IP and UDP header together in first mbuf.
423 if (m->m_len < iphlen + sizeof(struct udphdr)) {
424 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) {
425 UDPSTAT_INC(udps_hdrops);
426 return (IPPROTO_DONE);
429 ip = mtod(m, struct ip *);
430 uh = (struct udphdr *)((caddr_t)ip + iphlen);
431 cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0;
434 * Destination port of 0 is illegal, based on RFC768.
436 if (uh->uh_dport == 0)
440 * Construct sockaddr format source address. Stuff source address
441 * and datagram in user buffer.
443 bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2);
444 udp_in[0].sin_len = sizeof(struct sockaddr_in);
445 udp_in[0].sin_family = AF_INET;
446 udp_in[0].sin_port = uh->uh_sport;
447 udp_in[0].sin_addr = ip->ip_src;
448 udp_in[1].sin_len = sizeof(struct sockaddr_in);
449 udp_in[1].sin_family = AF_INET;
450 udp_in[1].sin_port = uh->uh_dport;
451 udp_in[1].sin_addr = ip->ip_dst;
454 * Make mbuf data length reflect UDP length. If not enough data to
455 * reflect UDP length, drop.
457 len = ntohs((u_short)uh->uh_ulen);
458 ip_len = ntohs(ip->ip_len) - iphlen;
459 if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) {
460 /* Zero means checksum over the complete packet. */
466 if (len > ip_len || len < sizeof(struct udphdr)) {
467 UDPSTAT_INC(udps_badlen);
470 if (proto == IPPROTO_UDP)
471 m_adj(m, len - ip_len);
475 * Save a copy of the IP header in case we want restore it for
476 * sending an ICMP error message in response.
478 if (!V_udp_blackhole)
481 memset(&save_ip, 0, sizeof(save_ip));
484 * Checksum extended UDP header and data.
489 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
491 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
492 uh_sum = m->m_pkthdr.csum_data;
494 uh_sum = in_pseudo(ip->ip_src.s_addr,
495 ip->ip_dst.s_addr, htonl((u_short)len +
496 m->m_pkthdr.csum_data + proto));
501 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
502 bzero(((struct ipovly *)ip)->ih_x1, 9);
503 ((struct ipovly *)ip)->ih_len = (proto == IPPROTO_UDP) ?
504 uh->uh_ulen : htons(ip_len);
505 uh_sum = in_cksum(m, len + sizeof (struct ip));
506 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
509 UDPSTAT_INC(udps_badsum);
511 return (IPPROTO_DONE);
514 if (proto == IPPROTO_UDP) {
515 UDPSTAT_INC(udps_nosum);
517 /* UDPLite requires a checksum */
518 /* XXX: What is the right UDPLite MIB counter here? */
520 return (IPPROTO_DONE);
524 pcbinfo = udp_get_inpcbinfo(proto);
525 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
526 in_broadcast(ip->ip_dst, ifp)) {
528 struct inpcbhead *pcblist;
532 pcblist = udp_get_pcblist(proto);
534 CK_LIST_FOREACH(inp, pcblist, inp_list) {
535 if (inp->inp_lport != uh->uh_dport)
538 if ((inp->inp_vflag & INP_IPV4) == 0)
541 if (inp->inp_laddr.s_addr != INADDR_ANY &&
542 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
544 if (inp->inp_faddr.s_addr != INADDR_ANY &&
545 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
547 if (inp->inp_fport != 0 &&
548 inp->inp_fport != uh->uh_sport)
553 if (__predict_false(inp->inp_flags2 & INP_FREED)) {
559 * XXXRW: Because we weren't holding either the inpcb
560 * or the hash lock when we checked for a match
561 * before, we should probably recheck now that the
562 * inpcb lock is held.
566 * Handle socket delivery policy for any-source
567 * and source-specific multicast. [RFC3678]
569 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
570 struct ip_moptions *imo;
571 struct sockaddr_in group;
574 imo = inp->inp_moptions;
579 bzero(&group, sizeof(struct sockaddr_in));
580 group.sin_len = sizeof(struct sockaddr_in);
581 group.sin_family = AF_INET;
582 group.sin_addr = ip->ip_dst;
584 blocked = imo_multi_filter(imo, ifp,
585 (struct sockaddr *)&group,
586 (struct sockaddr *)&udp_in[0]);
587 if (blocked != MCAST_PASS) {
588 if (blocked == MCAST_NOTGMEMBER)
589 IPSTAT_INC(ips_notmember);
590 if (blocked == MCAST_NOTSMEMBER ||
591 blocked == MCAST_MUTED)
592 UDPSTAT_INC(udps_filtermcast);
600 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) !=
602 if (proto == IPPROTO_UDPLITE)
603 UDPLITE_PROBE(receive, NULL, last, ip,
606 UDP_PROBE(receive, NULL, last, ip, last,
608 if (udp_append(last, ip, n, iphlen,
617 * Don't look for additional matches if this one does
618 * not have either the SO_REUSEPORT or SO_REUSEADDR
619 * socket options set. This heuristic avoids
620 * searching through all pcbs in the common case of a
621 * non-shared port. It assumes that an application
622 * will never clear these options after setting them.
624 if ((last->inp_socket->so_options &
625 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0)
631 * No matching pcb found; discard datagram. (No need
632 * to send an ICMP Port Unreachable for a broadcast
633 * or multicast datgram.)
635 UDPSTAT_INC(udps_noportbcast);
640 if (proto == IPPROTO_UDPLITE)
641 UDPLITE_PROBE(receive, NULL, last, ip, last, uh);
643 UDP_PROBE(receive, NULL, last, ip, last, uh);
644 if (udp_append(last, ip, m, iphlen, udp_in) == 0)
647 return (IPPROTO_DONE);
651 * Locate pcb for datagram.
655 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
657 if ((m->m_flags & M_IP_NEXTHOP) &&
658 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
659 struct sockaddr_in *next_hop;
661 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
664 * Transparently forwarded. Pretend to be the destination.
665 * Already got one like this?
667 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
668 ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
671 * It's new. Try to find the ambushing socket.
672 * Because we've rewritten the destination address,
673 * any hardware-generated hash is ignored.
675 inp = in_pcblookup(pcbinfo, ip->ip_src,
676 uh->uh_sport, next_hop->sin_addr,
677 next_hop->sin_port ? htons(next_hop->sin_port) :
678 uh->uh_dport, INPLOOKUP_WILDCARD |
679 INPLOOKUP_RLOCKPCB, ifp);
681 /* Remove the tag from the packet. We don't need it anymore. */
682 m_tag_delete(m, fwd_tag);
683 m->m_flags &= ~M_IP_NEXTHOP;
685 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
686 ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
687 INPLOOKUP_RLOCKPCB, ifp, m);
689 if (V_udp_log_in_vain) {
690 char src[INET_ADDRSTRLEN];
691 char dst[INET_ADDRSTRLEN];
694 "Connection attempt to UDP %s:%d from %s:%d\n",
695 inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport),
696 inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport));
698 if (proto == IPPROTO_UDPLITE)
699 UDPLITE_PROBE(receive, NULL, NULL, ip, NULL, uh);
701 UDP_PROBE(receive, NULL, NULL, ip, NULL, uh);
702 UDPSTAT_INC(udps_noport);
703 if (m->m_flags & (M_BCAST | M_MCAST)) {
704 UDPSTAT_INC(udps_noportbcast);
709 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
712 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
713 return (IPPROTO_DONE);
717 * Check the minimum TTL for socket.
719 INP_RLOCK_ASSERT(inp);
720 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
721 if (proto == IPPROTO_UDPLITE)
722 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
724 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
727 return (IPPROTO_DONE);
733 if (up->u_rxcslen == 0 || up->u_rxcslen > len) {
736 return (IPPROTO_DONE);
740 if (proto == IPPROTO_UDPLITE)
741 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
743 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
744 if (udp_append(inp, ip, m, iphlen, udp_in) == 0)
746 return (IPPROTO_DONE);
750 return (IPPROTO_DONE);
755 * Notify a udp user of an asynchronous error; just wake up so that they can
756 * collect error status.
759 udp_notify(struct inpcb *inp, int errno)
762 INP_WLOCK_ASSERT(inp);
763 if ((errno == EHOSTUNREACH || errno == ENETUNREACH ||
764 errno == EHOSTDOWN) && inp->inp_route.ro_rt) {
765 RTFREE(inp->inp_route.ro_rt);
766 inp->inp_route.ro_rt = (struct rtentry *)NULL;
769 inp->inp_socket->so_error = errno;
770 sorwakeup(inp->inp_socket);
771 sowwakeup(inp->inp_socket);
777 udp_common_ctlinput(int cmd, struct sockaddr *sa, void *vip,
778 struct inpcbinfo *pcbinfo)
782 struct in_addr faddr;
785 faddr = ((struct sockaddr_in *)sa)->sin_addr;
786 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
789 if (PRC_IS_REDIRECT(cmd)) {
790 /* signal EHOSTDOWN, as it flushes the cached route */
791 in_pcbnotifyall(&V_udbinfo, faddr, EHOSTDOWN, udp_notify);
796 * Hostdead is ugly because it goes linearly through all PCBs.
798 * XXX: We never get this from ICMP, otherwise it makes an excellent
799 * DoS attack on machines with many connections.
801 if (cmd == PRC_HOSTDEAD)
803 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
806 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
807 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
808 ip->ip_src, uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL);
810 INP_WLOCK_ASSERT(inp);
811 if (inp->inp_socket != NULL) {
812 udp_notify(inp, inetctlerrmap[cmd]);
816 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
817 ip->ip_src, uh->uh_sport,
818 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
826 func = up->u_icmp_func;
829 (*func)(cmd, sa, vip, ctx);
833 in_pcbnotifyall(pcbinfo, faddr, inetctlerrmap[cmd],
837 udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
840 return (udp_common_ctlinput(cmd, sa, vip, &V_udbinfo));
844 udplite_ctlinput(int cmd, struct sockaddr *sa, void *vip)
847 return (udp_common_ctlinput(cmd, sa, vip, &V_ulitecbinfo));
852 udp_pcblist(SYSCTL_HANDLER_ARGS)
855 struct epoch_tracker et;
859 if (req->newptr != 0)
862 if (req->oldptr == 0) {
865 n = V_udbinfo.ipi_count;
866 n += imax(n / 8, 10);
867 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
871 if ((error = sysctl_wire_old_buffer(req, 0)) != 0)
874 bzero(&xig, sizeof(xig));
875 xig.xig_len = sizeof xig;
876 xig.xig_count = V_udbinfo.ipi_count;
877 xig.xig_gen = V_udbinfo.ipi_gencnt;
878 xig.xig_sogen = so_gencnt;
879 error = SYSCTL_OUT(req, &xig, sizeof xig);
884 for (inp = CK_LIST_FIRST(V_udbinfo.ipi_listhead);
886 inp = CK_LIST_NEXT(inp, inp_list)) {
888 if (inp->inp_gencnt <= xig.xig_gen &&
889 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
892 in_pcbtoxinpcb(inp, &xi);
894 error = SYSCTL_OUT(req, &xi, sizeof xi);
904 * Give the user an updated idea of our state. If the
905 * generation differs from what we told her before, she knows
906 * that something happened while we were processing this
907 * request, and it might be necessary to retry.
909 xig.xig_gen = V_udbinfo.ipi_gencnt;
910 xig.xig_sogen = so_gencnt;
911 xig.xig_count = V_udbinfo.ipi_count;
912 error = SYSCTL_OUT(req, &xig, sizeof xig);
918 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist,
919 CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0,
920 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
924 udp_getcred(SYSCTL_HANDLER_ARGS)
927 struct sockaddr_in addrs[2];
928 struct epoch_tracker et;
932 error = priv_check(req->td, PRIV_NETINET_GETCRED);
935 error = SYSCTL_IN(req, addrs, sizeof(addrs));
939 inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
940 addrs[0].sin_addr, addrs[0].sin_port,
941 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
944 INP_RLOCK_ASSERT(inp);
945 if (inp->inp_socket == NULL)
948 error = cr_canseeinpcb(req->td->td_ucred, inp);
950 cru2x(inp->inp_cred, &xuc);
955 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
959 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
960 CTLTYPE_OPAQUE|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0,
961 udp_getcred, "S,xucred", "Get the xucred of a UDP connection");
965 udp_ctloutput(struct socket *so, struct sockopt *sopt)
969 int isudplite, error, optval;
972 isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0;
974 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
976 if (sopt->sopt_level != so->so_proto->pr_protocol) {
978 if (INP_CHECK_SOCKAF(so, AF_INET6)) {
980 error = ip6_ctloutput(so, sopt);
983 #if defined(INET) && defined(INET6)
989 error = ip_ctloutput(so, sopt);
995 switch (sopt->sopt_dir) {
997 switch (sopt->sopt_name) {
998 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1001 if (!IPSEC_ENABLED(ipv4)) {
1003 return (ENOPROTOOPT);
1005 error = UDPENCAP_PCBCTL(inp, sopt);
1009 case UDPLITE_SEND_CSCOV:
1010 case UDPLITE_RECV_CSCOV:
1013 error = ENOPROTOOPT;
1017 error = sooptcopyin(sopt, &optval, sizeof(optval),
1021 inp = sotoinpcb(so);
1022 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
1024 up = intoudpcb(inp);
1025 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1026 if ((optval != 0 && optval < 8) || (optval > 65535)) {
1031 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1032 up->u_txcslen = optval;
1034 up->u_rxcslen = optval;
1039 error = ENOPROTOOPT;
1044 switch (sopt->sopt_name) {
1045 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1048 if (!IPSEC_ENABLED(ipv4)) {
1050 return (ENOPROTOOPT);
1052 error = UDPENCAP_PCBCTL(inp, sopt);
1056 case UDPLITE_SEND_CSCOV:
1057 case UDPLITE_RECV_CSCOV:
1060 error = ENOPROTOOPT;
1063 up = intoudpcb(inp);
1064 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1065 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1066 optval = up->u_txcslen;
1068 optval = up->u_rxcslen;
1070 error = sooptcopyout(sopt, &optval, sizeof(optval));
1074 error = ENOPROTOOPT;
1084 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
1085 struct mbuf *control, struct thread *td)
1087 struct udpiphdr *ui;
1088 int len = m->m_pkthdr.len;
1089 struct in_addr faddr, laddr;
1091 struct inpcbinfo *pcbinfo;
1092 struct sockaddr_in *sin, src;
1093 struct epoch_tracker et;
1094 int cscov_partial = 0;
1097 u_short fport, lport;
1101 uint32_t flowid = 0;
1102 uint8_t flowtype = M_HASHTYPE_NONE;
1104 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1112 sin = (struct sockaddr_in *)addr;
1115 * udp_output() may need to temporarily bind or connect the current
1116 * inpcb. As such, we don't know up front whether we will need the
1117 * pcbinfo lock or not. Do any work to decide what is needed up
1118 * front before acquiring any locks.
1120 * We will need network epoch in either case, to safely lookup into
1124 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0))
1128 NET_EPOCH_ENTER(et);
1129 tos = inp->inp_ip_tos;
1130 if (control != NULL) {
1132 * XXX: Currently, we assume all the optional information is
1133 * stored in a single mbuf.
1135 if (control->m_next) {
1140 for (; control->m_len > 0;
1141 control->m_data += CMSG_ALIGN(cm->cmsg_len),
1142 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
1143 cm = mtod(control, struct cmsghdr *);
1144 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
1145 || cm->cmsg_len > control->m_len) {
1149 if (cm->cmsg_level != IPPROTO_IP)
1152 switch (cm->cmsg_type) {
1153 case IP_SENDSRCADDR:
1155 CMSG_LEN(sizeof(struct in_addr))) {
1159 bzero(&src, sizeof(src));
1160 src.sin_family = AF_INET;
1161 src.sin_len = sizeof(src);
1162 src.sin_port = inp->inp_lport;
1164 *(struct in_addr *)CMSG_DATA(cm);
1168 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
1172 tos = *(u_char *)CMSG_DATA(cm);
1176 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1180 flowid = *(uint32_t *) CMSG_DATA(cm);
1184 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1188 flowtype = *(uint32_t *) CMSG_DATA(cm);
1192 case IP_RSSBUCKETID:
1193 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1197 /* This is just a placeholder for now */
1201 error = ENOPROTOOPT;
1212 pr = inp->inp_socket->so_proto->pr_protocol;
1213 pcbinfo = udp_get_inpcbinfo(pr);
1216 * If the IP_SENDSRCADDR control message was specified, override the
1217 * source address for this datagram. Its use is invalidated if the
1218 * address thus specified is incomplete or clobbers other inpcbs.
1220 laddr = inp->inp_laddr;
1221 lport = inp->inp_lport;
1222 if (src.sin_family == AF_INET) {
1223 INP_HASH_LOCK_ASSERT(pcbinfo);
1225 (laddr.s_addr == INADDR_ANY &&
1226 src.sin_addr.s_addr == INADDR_ANY)) {
1230 error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
1231 &laddr.s_addr, &lport, td->td_ucred);
1237 * If a UDP socket has been connected, then a local address/port will
1238 * have been selected and bound.
1240 * If a UDP socket has not been connected to, then an explicit
1241 * destination address must be used, in which case a local
1242 * address/port may not have been selected and bound.
1245 INP_LOCK_ASSERT(inp);
1246 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1252 * Jail may rewrite the destination address, so let it do
1253 * that before we use it.
1255 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1260 * If a local address or port hasn't yet been selected, or if
1261 * the destination address needs to be rewritten due to using
1262 * a special INADDR_ constant, invoke in_pcbconnect_setup()
1263 * to do the heavy lifting. Once a port is selected, we
1264 * commit the binding back to the socket; we also commit the
1265 * binding of the address if in jail.
1267 * If we already have a valid binding and we're not
1268 * requesting a destination address rewrite, use a fast path.
1270 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1271 inp->inp_lport == 0 ||
1272 sin->sin_addr.s_addr == INADDR_ANY ||
1273 sin->sin_addr.s_addr == INADDR_BROADCAST) {
1274 INP_HASH_LOCK_ASSERT(pcbinfo);
1275 error = in_pcbconnect_setup(inp, addr, &laddr.s_addr,
1276 &lport, &faddr.s_addr, &fport, NULL,
1282 * XXXRW: Why not commit the port if the address is
1285 /* Commit the local port if newly assigned. */
1286 if (inp->inp_laddr.s_addr == INADDR_ANY &&
1287 inp->inp_lport == 0) {
1288 INP_WLOCK_ASSERT(inp);
1290 * Remember addr if jailed, to prevent
1293 if (prison_flag(td->td_ucred, PR_IP4))
1294 inp->inp_laddr = laddr;
1295 inp->inp_lport = lport;
1296 INP_HASH_WLOCK(pcbinfo);
1297 error = in_pcbinshash(inp);
1298 INP_HASH_WUNLOCK(pcbinfo);
1304 inp->inp_flags |= INP_ANONPORT;
1307 faddr = sin->sin_addr;
1308 fport = sin->sin_port;
1311 INP_LOCK_ASSERT(inp);
1312 faddr = inp->inp_faddr;
1313 fport = inp->inp_fport;
1314 if (faddr.s_addr == INADDR_ANY) {
1321 * Calculate data length and get a mbuf for UDP, IP, and possible
1322 * link-layer headers. Immediate slide the data pointer back forward
1323 * since we won't use that space at this layer.
1325 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT);
1330 m->m_data += max_linkhdr;
1331 m->m_len -= max_linkhdr;
1332 m->m_pkthdr.len -= max_linkhdr;
1335 * Fill in mbuf with extended UDP header and addresses and length put
1336 * into network format.
1338 ui = mtod(m, struct udpiphdr *);
1339 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1340 ui->ui_v = IPVERSION << 4;
1344 ui->ui_sport = lport;
1345 ui->ui_dport = fport;
1346 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1347 if (pr == IPPROTO_UDPLITE) {
1351 up = intoudpcb(inp);
1352 cscov = up->u_txcslen;
1353 plen = (u_short)len + sizeof(struct udphdr);
1356 ui->ui_len = htons(plen);
1357 ui->ui_ulen = htons(cscov);
1359 * For UDP-Lite, checksum coverage length of zero means
1360 * the entire UDPLite packet is covered by the checksum.
1362 cscov_partial = (cscov == 0) ? 0 : 1;
1366 * Set the Don't Fragment bit in the IP header.
1368 if (inp->inp_flags & INP_DONTFRAG) {
1371 ip = (struct ip *)&ui->ui_i;
1372 ip->ip_off |= htons(IP_DF);
1376 if (inp->inp_socket->so_options & SO_DONTROUTE)
1377 ipflags |= IP_ROUTETOIF;
1378 if (inp->inp_socket->so_options & SO_BROADCAST)
1379 ipflags |= IP_ALLOWBROADCAST;
1380 if (inp->inp_flags & INP_ONESBCAST)
1381 ipflags |= IP_SENDONES;
1384 mac_inpcb_create_mbuf(inp, m);
1388 * Set up checksum and output datagram.
1391 if (pr == IPPROTO_UDPLITE) {
1392 if (inp->inp_flags & INP_ONESBCAST)
1393 faddr.s_addr = INADDR_BROADCAST;
1394 if (cscov_partial) {
1395 if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
1396 ui->ui_sum = 0xffff;
1398 if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0)
1399 ui->ui_sum = 0xffff;
1401 } else if (V_udp_cksum) {
1402 if (inp->inp_flags & INP_ONESBCAST)
1403 faddr.s_addr = INADDR_BROADCAST;
1404 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1405 htons((u_short)len + sizeof(struct udphdr) + pr));
1406 m->m_pkthdr.csum_flags = CSUM_UDP;
1407 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1409 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len);
1410 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1411 ((struct ip *)ui)->ip_tos = tos; /* XXX */
1412 UDPSTAT_INC(udps_opackets);
1415 * Setup flowid / RSS information for outbound socket.
1417 * Once the UDP code decides to set a flowid some other way,
1418 * this allows the flowid to be overridden by userland.
1420 if (flowtype != M_HASHTYPE_NONE) {
1421 m->m_pkthdr.flowid = flowid;
1422 M_HASHTYPE_SET(m, flowtype);
1426 uint32_t hash_val, hash_type;
1428 * Calculate an appropriate RSS hash for UDP and
1431 * The called function will take care of figuring out
1432 * whether a 2-tuple or 4-tuple hash is required based
1433 * on the currently configured scheme.
1435 * Later later on connected socket values should be
1436 * cached in the inpcb and reused, rather than constantly
1437 * re-calculating it.
1439 * UDP Lite is a different protocol number and will
1440 * likely end up being hashed as a 2-tuple until
1441 * RSS / NICs grow UDP Lite protocol awareness.
1443 if (rss_proto_software_hash_v4(faddr, laddr, fport, lport,
1444 pr, &hash_val, &hash_type) == 0) {
1445 m->m_pkthdr.flowid = hash_val;
1446 M_HASHTYPE_SET(m, hash_type);
1451 * Don't override with the inp cached flowid value.
1453 * Depending upon the kind of send being done, the inp
1454 * flowid/flowtype values may actually not be appropriate
1455 * for this particular socket send.
1457 * We should either leave the flowid at zero (which is what is
1458 * currently done) or set it to some software generated
1459 * hash value based on the packet contents.
1461 ipflags |= IP_NODEFAULTFLOWID;
1464 if (pr == IPPROTO_UDPLITE)
1465 UDPLITE_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1467 UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1468 error = ip_output(m, inp->inp_options,
1469 INP_WLOCKED(inp) ? &inp->inp_route : NULL, ipflags,
1470 inp->inp_moptions, inp);
1483 udp_abort(struct socket *so)
1486 struct inpcbinfo *pcbinfo;
1488 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1489 inp = sotoinpcb(so);
1490 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1492 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1493 INP_HASH_WLOCK(pcbinfo);
1494 in_pcbdisconnect(inp);
1495 inp->inp_laddr.s_addr = INADDR_ANY;
1496 INP_HASH_WUNLOCK(pcbinfo);
1497 soisdisconnected(so);
1503 udp_attach(struct socket *so, int proto, struct thread *td)
1505 static uint32_t udp_flowid;
1507 struct inpcbinfo *pcbinfo;
1510 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1511 inp = sotoinpcb(so);
1512 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1513 error = soreserve(so, udp_sendspace, udp_recvspace);
1516 INP_INFO_WLOCK(pcbinfo);
1517 error = in_pcballoc(so, pcbinfo);
1519 INP_INFO_WUNLOCK(pcbinfo);
1523 inp = sotoinpcb(so);
1524 inp->inp_vflag |= INP_IPV4;
1525 inp->inp_ip_ttl = V_ip_defttl;
1526 inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1);
1527 inp->inp_flowtype = M_HASHTYPE_OPAQUE;
1529 error = udp_newudpcb(inp);
1533 INP_INFO_WUNLOCK(pcbinfo);
1538 INP_INFO_WUNLOCK(pcbinfo);
1544 udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx)
1549 KASSERT(so->so_type == SOCK_DGRAM,
1550 ("udp_set_kernel_tunneling: !dgram"));
1551 inp = sotoinpcb(so);
1552 KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL"));
1554 up = intoudpcb(inp);
1555 if ((up->u_tun_func != NULL) ||
1556 (up->u_icmp_func != NULL)) {
1561 up->u_icmp_func = i;
1562 up->u_tun_ctx = ctx;
1569 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1572 struct inpcbinfo *pcbinfo;
1575 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1576 inp = sotoinpcb(so);
1577 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1579 INP_HASH_WLOCK(pcbinfo);
1580 error = in_pcbbind(inp, nam, td->td_ucred);
1581 INP_HASH_WUNLOCK(pcbinfo);
1587 udp_close(struct socket *so)
1590 struct inpcbinfo *pcbinfo;
1592 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1593 inp = sotoinpcb(so);
1594 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1596 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1597 INP_HASH_WLOCK(pcbinfo);
1598 in_pcbdisconnect(inp);
1599 inp->inp_laddr.s_addr = INADDR_ANY;
1600 INP_HASH_WUNLOCK(pcbinfo);
1601 soisdisconnected(so);
1607 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1609 struct epoch_tracker et;
1611 struct inpcbinfo *pcbinfo;
1612 struct sockaddr_in *sin;
1615 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1616 inp = sotoinpcb(so);
1617 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1619 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1623 sin = (struct sockaddr_in *)nam;
1624 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1629 NET_EPOCH_ENTER(et);
1630 INP_HASH_WLOCK(pcbinfo);
1631 error = in_pcbconnect(inp, nam, td->td_ucred);
1632 INP_HASH_WUNLOCK(pcbinfo);
1641 udp_detach(struct socket *so)
1644 struct inpcbinfo *pcbinfo;
1647 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1648 inp = sotoinpcb(so);
1649 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1650 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1651 ("udp_detach: not disconnected"));
1652 INP_INFO_WLOCK(pcbinfo);
1654 up = intoudpcb(inp);
1655 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1656 inp->inp_ppcb = NULL;
1659 INP_INFO_WUNLOCK(pcbinfo);
1664 udp_disconnect(struct socket *so)
1667 struct inpcbinfo *pcbinfo;
1669 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1670 inp = sotoinpcb(so);
1671 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1673 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1677 INP_HASH_WLOCK(pcbinfo);
1678 in_pcbdisconnect(inp);
1679 inp->inp_laddr.s_addr = INADDR_ANY;
1680 INP_HASH_WUNLOCK(pcbinfo);
1682 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1689 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1690 struct mbuf *control, struct thread *td)
1694 inp = sotoinpcb(so);
1695 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1696 return (udp_output(inp, m, addr, control, td));
1701 udp_shutdown(struct socket *so)
1705 inp = sotoinpcb(so);
1706 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1714 struct pr_usrreqs udp_usrreqs = {
1715 .pru_abort = udp_abort,
1716 .pru_attach = udp_attach,
1717 .pru_bind = udp_bind,
1718 .pru_connect = udp_connect,
1719 .pru_control = in_control,
1720 .pru_detach = udp_detach,
1721 .pru_disconnect = udp_disconnect,
1722 .pru_peeraddr = in_getpeeraddr,
1723 .pru_send = udp_send,
1724 .pru_soreceive = soreceive_dgram,
1725 .pru_sosend = sosend_dgram,
1726 .pru_shutdown = udp_shutdown,
1727 .pru_sockaddr = in_getsockaddr,
1728 .pru_sosetlabel = in_pcbsosetlabel,
1729 .pru_close = udp_close,