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);
152 VNET_DEFINE_STATIC(uma_zone_t, udpcb_zone);
153 #define V_udpcb_zone VNET(udpcb_zone)
156 #define UDBHASHSIZE 128
159 VNET_PCPUSTAT_DEFINE(struct udpstat, udpstat); /* from udp_var.h */
160 VNET_PCPUSTAT_SYSINIT(udpstat);
161 SYSCTL_VNET_PCPUSTAT(_net_inet_udp, UDPCTL_STATS, stats, struct udpstat,
162 udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
165 VNET_PCPUSTAT_SYSUNINIT(udpstat);
168 static void udp_detach(struct socket *so);
169 static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
170 struct mbuf *, struct thread *, int);
173 INPCBSTORAGE_DEFINE(udpcbstor, "udpinp", "udp_inpcb", "udp", "udphash");
174 INPCBSTORAGE_DEFINE(udplitecbstor, "udpliteinp", "udplite_inpcb", "udplite",
178 udp_vnet_init(void *arg __unused)
182 * For now default to 2-tuple UDP hashing - until the fragment
183 * reassembly code can also update the flowid.
185 * Once we can calculate the flowid that way and re-establish
186 * a 4-tuple, flip this to 4-tuple.
188 in_pcbinfo_init(&V_udbinfo, &udpcbstor, UDBHASHSIZE, UDBHASHSIZE);
189 V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
190 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
191 uma_zone_set_max(V_udpcb_zone, maxsockets);
192 uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached");
194 /* Additional pcbinfo for UDP-Lite */
195 in_pcbinfo_init(&V_ulitecbinfo, &udplitecbstor, UDBHASHSIZE,
198 VNET_SYSINIT(udp_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
199 udp_vnet_init, NULL);
202 * Kernel module interface for updating udpstat. The argument is an index
203 * into udpstat treated as an array of u_long. While this encodes the
204 * general layout of udpstat into the caller, it doesn't encode its location,
205 * so that future changes to add, for example, per-CPU stats support won't
206 * cause binary compatibility problems for kernel modules.
209 kmod_udpstat_inc(int statnum)
212 counter_u64_add(VNET(udpstat)[statnum], 1);
216 udp_newudpcb(struct inpcb *inp)
220 up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO);
228 udp_discardcb(struct udpcb *up)
231 uma_zfree(V_udpcb_zone, up);
236 udp_destroy(void *unused __unused)
239 in_pcbinfo_destroy(&V_udbinfo);
240 uma_zdestroy(V_udpcb_zone);
242 VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
245 udplite_destroy(void *unused __unused)
248 in_pcbinfo_destroy(&V_ulitecbinfo);
250 VNET_SYSUNINIT(udplite, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udplite_destroy,
256 * Subroutine of udp_input(), which appends the provided mbuf chain to the
257 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
258 * contains the source address. If the socket ends up being an IPv6 socket,
259 * udp_append() will convert to a sockaddr_in6 before passing the address
260 * into the socket code.
262 * In the normal case udp_append() will return 0, indicating that you
263 * must unlock the inp. However if a tunneling protocol is in place we increment
264 * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we
265 * then decrement the reference count. If the inp_rele returns 1, indicating the
266 * inp is gone, we return that to the caller to tell them *not* to unlock
267 * the inp. In the case of multi-cast this will cause the distribution
268 * to stop (though most tunneling protocols known currently do *not* use
272 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
273 struct sockaddr_in *udp_in)
275 struct sockaddr *append_sa;
277 struct mbuf *tmpopts, *opts = NULL;
279 struct sockaddr_in6 udp_in6;
284 INP_LOCK_ASSERT(inp);
287 * Engage the tunneling protocol.
290 if (up->u_tun_func != NULL) {
293 filtered = (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0],
297 return (in_pcbrele_rlocked(inp));
300 off += sizeof(struct udphdr);
302 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
303 /* Check AH/ESP integrity. */
304 if (IPSEC_ENABLED(ipv4) &&
305 IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) {
309 if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */
310 if (IPSEC_ENABLED(ipv4) &&
311 UDPENCAP_INPUT(n, off, AF_INET) != 0)
312 return (0); /* Consumed. */
316 if (mac_inpcb_check_deliver(inp, n) != 0) {
321 if (inp->inp_flags & INP_CONTROLOPTS ||
322 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
324 if (inp->inp_vflag & INP_IPV6)
325 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
328 ip_savecontrol(inp, &opts, ip, n);
330 if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
331 tmpopts = sbcreatecontrol(&udp_in[1],
332 sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP,
336 tmpopts->m_next = opts;
343 if (inp->inp_vflag & INP_IPV6) {
344 bzero(&udp_in6, sizeof(udp_in6));
345 udp_in6.sin6_len = sizeof(udp_in6);
346 udp_in6.sin6_family = AF_INET6;
347 in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6);
348 append_sa = (struct sockaddr *)&udp_in6;
351 append_sa = (struct sockaddr *)&udp_in[0];
354 so = inp->inp_socket;
355 SOCKBUF_LOCK(&so->so_rcv);
356 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
357 soroverflow_locked(so);
361 UDPSTAT_INC(udps_fullsock);
363 sorwakeup_locked(so);
368 udp_multi_match(const struct inpcb *inp, void *v)
371 struct udphdr *uh = (struct udphdr *)(ip + 1);
373 if (inp->inp_lport != uh->uh_dport)
376 if ((inp->inp_vflag & INP_IPV4) == 0)
379 if (inp->inp_laddr.s_addr != INADDR_ANY &&
380 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
382 if (inp->inp_faddr.s_addr != INADDR_ANY &&
383 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
385 if (inp->inp_fport != 0 &&
386 inp->inp_fport != uh->uh_sport)
393 udp_multi_input(struct mbuf *m, int proto, struct sockaddr_in *udp_in)
395 struct ip *ip = mtod(m, struct ip *);
396 struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto),
397 INPLOOKUP_RLOCKPCB, udp_multi_match, ip);
399 struct udphdr *uh = (struct udphdr *)(ip + 1);
405 MPASS(ip->ip_hl == sizeof(struct ip) >> 2);
407 while ((inp = inp_next(&inpi)) != NULL) {
409 * XXXRW: Because we weren't holding either the inpcb
410 * or the hash lock when we checked for a match
411 * before, we should probably recheck now that the
412 * inpcb lock is held.
415 * Handle socket delivery policy for any-source
416 * and source-specific multicast. [RFC3678]
418 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
419 struct ip_moptions *imo;
420 struct sockaddr_in group;
423 imo = inp->inp_moptions;
426 bzero(&group, sizeof(struct sockaddr_in));
427 group.sin_len = sizeof(struct sockaddr_in);
428 group.sin_family = AF_INET;
429 group.sin_addr = ip->ip_dst;
431 blocked = imo_multi_filter(imo, m->m_pkthdr.rcvif,
432 (struct sockaddr *)&group,
433 (struct sockaddr *)&udp_in[0]);
434 if (blocked != MCAST_PASS) {
435 if (blocked == MCAST_NOTGMEMBER)
436 IPSTAT_INC(ips_notmember);
437 if (blocked == MCAST_NOTSMEMBER ||
438 blocked == MCAST_MUTED)
439 UDPSTAT_INC(udps_filtermcast);
443 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
444 if (proto == IPPROTO_UDPLITE)
445 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
447 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
448 if (udp_append(inp, ip, n, sizeof(struct ip), udp_in)) {
455 * Don't look for additional matches if this one does
456 * not have either the SO_REUSEPORT or SO_REUSEADDR
457 * socket options set. This heuristic avoids
458 * searching through all pcbs in the common case of a
459 * non-shared port. It assumes that an application
460 * will never clear these options after setting them.
462 if ((inp->inp_socket->so_options &
463 (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0) {
471 * No matching pcb found; discard datagram. (No need
472 * to send an ICMP Port Unreachable for a broadcast
473 * or multicast datgram.)
475 UDPSTAT_INC(udps_noport);
476 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)))
477 UDPSTAT_INC(udps_noportmcast);
479 UDPSTAT_INC(udps_noportbcast);
483 return (IPPROTO_DONE);
487 udp_input(struct mbuf **mp, int *offp, int proto)
493 uint16_t len, ip_len;
494 struct inpcbinfo *pcbinfo;
495 struct sockaddr_in udp_in[2];
497 struct m_tag *fwd_tag;
498 int cscov_partial, iphlen;
502 ifp = m->m_pkthdr.rcvif;
504 UDPSTAT_INC(udps_ipackets);
507 * Strip IP options, if any; should skip this, make available to
508 * user, and use on returned packets, but we don't yet have a way to
509 * check the checksum with options still present.
511 if (iphlen > sizeof (struct ip)) {
513 iphlen = sizeof(struct ip);
517 * Get IP and UDP header together in first mbuf.
519 if (m->m_len < iphlen + sizeof(struct udphdr)) {
520 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) {
521 UDPSTAT_INC(udps_hdrops);
522 return (IPPROTO_DONE);
525 ip = mtod(m, struct ip *);
526 uh = (struct udphdr *)((caddr_t)ip + iphlen);
527 cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0;
530 * Destination port of 0 is illegal, based on RFC768.
532 if (uh->uh_dport == 0)
536 * Construct sockaddr format source address. Stuff source address
537 * and datagram in user buffer.
539 bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2);
540 udp_in[0].sin_len = sizeof(struct sockaddr_in);
541 udp_in[0].sin_family = AF_INET;
542 udp_in[0].sin_port = uh->uh_sport;
543 udp_in[0].sin_addr = ip->ip_src;
544 udp_in[1].sin_len = sizeof(struct sockaddr_in);
545 udp_in[1].sin_family = AF_INET;
546 udp_in[1].sin_port = uh->uh_dport;
547 udp_in[1].sin_addr = ip->ip_dst;
550 * Make mbuf data length reflect UDP length. If not enough data to
551 * reflect UDP length, drop.
553 len = ntohs((u_short)uh->uh_ulen);
554 ip_len = ntohs(ip->ip_len) - iphlen;
555 if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) {
556 /* Zero means checksum over the complete packet. */
562 if (len > ip_len || len < sizeof(struct udphdr)) {
563 UDPSTAT_INC(udps_badlen);
566 if (proto == IPPROTO_UDP)
567 m_adj(m, len - ip_len);
571 * Checksum extended UDP header and data.
576 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
578 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
579 uh_sum = m->m_pkthdr.csum_data;
581 uh_sum = in_pseudo(ip->ip_src.s_addr,
582 ip->ip_dst.s_addr, htonl((u_short)len +
583 m->m_pkthdr.csum_data + proto));
586 char b[offsetof(struct ipovly, ih_src)];
587 struct ipovly *ipov = (struct ipovly *)ip;
589 bcopy(ipov, b, sizeof(b));
590 bzero(ipov, sizeof(ipov->ih_x1));
591 ipov->ih_len = (proto == IPPROTO_UDP) ?
592 uh->uh_ulen : htons(ip_len);
593 uh_sum = in_cksum(m, len + sizeof (struct ip));
594 bcopy(b, ipov, sizeof(b));
597 UDPSTAT_INC(udps_badsum);
599 return (IPPROTO_DONE);
602 if (proto == IPPROTO_UDP) {
603 UDPSTAT_INC(udps_nosum);
605 /* UDPLite requires a checksum */
606 /* XXX: What is the right UDPLite MIB counter here? */
608 return (IPPROTO_DONE);
612 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
613 in_broadcast(ip->ip_dst, ifp))
614 return (udp_multi_input(m, proto, udp_in));
616 pcbinfo = udp_get_inpcbinfo(proto);
619 * Locate pcb for datagram.
621 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
623 if ((m->m_flags & M_IP_NEXTHOP) &&
624 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
625 struct sockaddr_in *next_hop;
627 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
630 * Transparently forwarded. Pretend to be the destination.
631 * Already got one like this?
633 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
634 ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
637 * It's new. Try to find the ambushing socket.
638 * Because we've rewritten the destination address,
639 * any hardware-generated hash is ignored.
641 inp = in_pcblookup(pcbinfo, ip->ip_src,
642 uh->uh_sport, next_hop->sin_addr,
643 next_hop->sin_port ? htons(next_hop->sin_port) :
644 uh->uh_dport, INPLOOKUP_WILDCARD |
645 INPLOOKUP_RLOCKPCB, ifp);
647 /* Remove the tag from the packet. We don't need it anymore. */
648 m_tag_delete(m, fwd_tag);
649 m->m_flags &= ~M_IP_NEXTHOP;
651 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
652 ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
653 INPLOOKUP_RLOCKPCB, ifp, m);
655 if (V_udp_log_in_vain) {
656 char src[INET_ADDRSTRLEN];
657 char dst[INET_ADDRSTRLEN];
660 "Connection attempt to UDP %s:%d from %s:%d\n",
661 inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport),
662 inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport));
664 if (proto == IPPROTO_UDPLITE)
665 UDPLITE_PROBE(receive, NULL, NULL, ip, NULL, uh);
667 UDP_PROBE(receive, NULL, NULL, ip, NULL, uh);
668 UDPSTAT_INC(udps_noport);
669 if (m->m_flags & (M_BCAST | M_MCAST)) {
670 UDPSTAT_INC(udps_noportbcast);
673 if (V_udp_blackhole && (V_udp_blackhole_local ||
674 !in_localip(ip->ip_src)))
676 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
678 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
679 return (IPPROTO_DONE);
683 * Check the minimum TTL for socket.
685 INP_RLOCK_ASSERT(inp);
686 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
687 if (proto == IPPROTO_UDPLITE)
688 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
690 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
693 return (IPPROTO_DONE);
699 if (up->u_rxcslen == 0 || up->u_rxcslen > len) {
702 return (IPPROTO_DONE);
706 if (proto == IPPROTO_UDPLITE)
707 UDPLITE_PROBE(receive, NULL, inp, ip, inp, uh);
709 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
710 if (udp_append(inp, ip, m, iphlen, udp_in) == 0)
712 return (IPPROTO_DONE);
716 return (IPPROTO_DONE);
721 * Notify a udp user of an asynchronous error; just wake up so that they can
722 * collect error status.
725 udp_notify(struct inpcb *inp, int errno)
728 INP_WLOCK_ASSERT(inp);
729 if ((errno == EHOSTUNREACH || errno == ENETUNREACH ||
730 errno == EHOSTDOWN) && inp->inp_route.ro_nh) {
731 NH_FREE(inp->inp_route.ro_nh);
732 inp->inp_route.ro_nh = (struct nhop_object *)NULL;
735 inp->inp_socket->so_error = errno;
736 sorwakeup(inp->inp_socket);
737 sowwakeup(inp->inp_socket);
743 udp_common_ctlinput(int cmd, struct sockaddr *sa, void *vip,
744 struct inpcbinfo *pcbinfo)
748 struct in_addr faddr;
751 faddr = ((struct sockaddr_in *)sa)->sin_addr;
752 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
755 if (PRC_IS_REDIRECT(cmd)) {
756 /* signal EHOSTDOWN, as it flushes the cached route */
757 in_pcbnotifyall(pcbinfo, faddr, EHOSTDOWN, udp_notify);
762 * Hostdead is ugly because it goes linearly through all PCBs.
764 * XXX: We never get this from ICMP, otherwise it makes an excellent
765 * DoS attack on machines with many connections.
767 if (cmd == PRC_HOSTDEAD)
769 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
772 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
773 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
774 ip->ip_src, uh->uh_sport, INPLOOKUP_WLOCKPCB, NULL);
776 INP_WLOCK_ASSERT(inp);
777 if (inp->inp_socket != NULL) {
778 udp_notify(inp, inetctlerrmap[cmd]);
782 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
783 ip->ip_src, uh->uh_sport,
784 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
792 func = up->u_icmp_func;
795 (*func)(cmd, sa, vip, ctx);
799 in_pcbnotifyall(pcbinfo, faddr, inetctlerrmap[cmd],
804 udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
807 return (udp_common_ctlinput(cmd, sa, vip, &V_udbinfo));
811 udplite_ctlinput(int cmd, struct sockaddr *sa, void *vip)
814 return (udp_common_ctlinput(cmd, sa, vip, &V_ulitecbinfo));
819 udp_pcblist(SYSCTL_HANDLER_ARGS)
821 struct inpcb_iterator inpi = INP_ALL_ITERATOR(&V_udbinfo,
827 if (req->newptr != 0)
830 if (req->oldptr == 0) {
833 n = V_udbinfo.ipi_count;
834 n += imax(n / 8, 10);
835 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
839 if ((error = sysctl_wire_old_buffer(req, 0)) != 0)
842 bzero(&xig, sizeof(xig));
843 xig.xig_len = sizeof xig;
844 xig.xig_count = V_udbinfo.ipi_count;
845 xig.xig_gen = V_udbinfo.ipi_gencnt;
846 xig.xig_sogen = so_gencnt;
847 error = SYSCTL_OUT(req, &xig, sizeof xig);
851 while ((inp = inp_next(&inpi)) != NULL) {
852 if (inp->inp_gencnt <= xig.xig_gen &&
853 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
856 in_pcbtoxinpcb(inp, &xi);
857 error = SYSCTL_OUT(req, &xi, sizeof xi);
867 * Give the user an updated idea of our state. If the
868 * generation differs from what we told her before, she knows
869 * that something happened while we were processing this
870 * request, and it might be necessary to retry.
872 xig.xig_gen = V_udbinfo.ipi_gencnt;
873 xig.xig_sogen = so_gencnt;
874 xig.xig_count = V_udbinfo.ipi_count;
875 error = SYSCTL_OUT(req, &xig, sizeof xig);
881 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist,
882 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
883 udp_pcblist, "S,xinpcb",
884 "List of active UDP sockets");
888 udp_getcred(SYSCTL_HANDLER_ARGS)
891 struct sockaddr_in addrs[2];
892 struct epoch_tracker et;
896 error = priv_check(req->td, PRIV_NETINET_GETCRED);
899 error = SYSCTL_IN(req, addrs, sizeof(addrs));
903 inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
904 addrs[0].sin_addr, addrs[0].sin_port,
905 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
908 INP_RLOCK_ASSERT(inp);
909 if (inp->inp_socket == NULL)
912 error = cr_canseeinpcb(req->td->td_ucred, inp);
914 cru2x(inp->inp_cred, &xuc);
919 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
923 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
924 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
925 0, 0, udp_getcred, "S,xucred",
926 "Get the xucred of a UDP connection");
930 udp_ctloutput(struct socket *so, struct sockopt *sopt)
934 int isudplite, error, optval;
937 isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0;
939 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
941 if (sopt->sopt_level != so->so_proto->pr_protocol) {
943 if (INP_CHECK_SOCKAF(so, AF_INET6)) {
945 error = ip6_ctloutput(so, sopt);
948 #if defined(INET) && defined(INET6)
954 error = ip_ctloutput(so, sopt);
960 switch (sopt->sopt_dir) {
962 switch (sopt->sopt_name) {
963 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
966 if (!IPSEC_ENABLED(ipv4)) {
968 return (ENOPROTOOPT);
970 error = UDPENCAP_PCBCTL(inp, sopt);
974 case UDPLITE_SEND_CSCOV:
975 case UDPLITE_RECV_CSCOV:
982 error = sooptcopyin(sopt, &optval, sizeof(optval),
987 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
990 KASSERT(up != NULL, ("%s: up == NULL", __func__));
991 if ((optval != 0 && optval < 8) || (optval > 65535)) {
996 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
997 up->u_txcslen = optval;
999 up->u_rxcslen = optval;
1004 error = ENOPROTOOPT;
1009 switch (sopt->sopt_name) {
1010 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1013 if (!IPSEC_ENABLED(ipv4)) {
1015 return (ENOPROTOOPT);
1017 error = UDPENCAP_PCBCTL(inp, sopt);
1021 case UDPLITE_SEND_CSCOV:
1022 case UDPLITE_RECV_CSCOV:
1025 error = ENOPROTOOPT;
1028 up = intoudpcb(inp);
1029 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1030 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1031 optval = up->u_txcslen;
1033 optval = up->u_rxcslen;
1035 error = sooptcopyout(sopt, &optval, sizeof(optval));
1039 error = ENOPROTOOPT;
1049 /* The logic here is derived from ip6_setpktopt(). See comments there. */
1051 udp_v4mapped_pktinfo(struct cmsghdr *cm, struct sockaddr_in * src,
1052 struct inpcb *inp, int flags)
1055 struct in6_pktinfo *pktinfo;
1058 if ((flags & PRUS_IPV6) == 0)
1061 if (cm->cmsg_level != IPPROTO_IPV6)
1064 if (cm->cmsg_type != IPV6_2292PKTINFO &&
1065 cm->cmsg_type != IPV6_PKTINFO)
1069 CMSG_LEN(sizeof(struct in6_pktinfo)))
1072 pktinfo = (struct in6_pktinfo *)CMSG_DATA(cm);
1073 if (!IN6_IS_ADDR_V4MAPPED(&pktinfo->ipi6_addr) &&
1074 !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr))
1077 /* Validate the interface index if specified. */
1078 if (pktinfo->ipi6_ifindex) {
1079 struct epoch_tracker et;
1081 NET_EPOCH_ENTER(et);
1082 ifp = ifnet_byindex(pktinfo->ipi6_ifindex);
1083 NET_EPOCH_EXIT(et); /* XXXGL: unsafe ifp */
1088 if (ifp != NULL && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) {
1089 ia.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1090 if (in_ifhasaddr(ifp, ia) == 0)
1091 return (EADDRNOTAVAIL);
1094 bzero(src, sizeof(*src));
1095 src->sin_family = AF_INET;
1096 src->sin_len = sizeof(*src);
1097 src->sin_port = inp->inp_lport;
1098 src->sin_addr.s_addr = pktinfo->ipi6_addr.s6_addr32[3];
1105 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
1106 struct mbuf *control, struct thread *td, int flags)
1108 struct udpiphdr *ui;
1109 int len = m->m_pkthdr.len;
1110 struct in_addr faddr, laddr;
1112 struct inpcbinfo *pcbinfo;
1113 struct sockaddr_in *sin, src;
1114 struct epoch_tracker et;
1115 int cscov_partial = 0;
1118 u_short fport, lport;
1122 uint32_t flowid = 0;
1123 uint8_t flowtype = M_HASHTYPE_NONE;
1125 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1133 sin = (struct sockaddr_in *)addr;
1136 * udp_output() may need to temporarily bind or connect the current
1137 * inpcb. As such, we don't know up front whether we will need the
1138 * pcbinfo lock or not. Do any work to decide what is needed up
1139 * front before acquiring any locks.
1141 * We will need network epoch in either case, to safely lookup into
1145 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0))
1149 NET_EPOCH_ENTER(et);
1150 tos = inp->inp_ip_tos;
1151 if (control != NULL) {
1153 * XXX: Currently, we assume all the optional information is
1154 * stored in a single mbuf.
1156 if (control->m_next) {
1161 for (; control->m_len > 0;
1162 control->m_data += CMSG_ALIGN(cm->cmsg_len),
1163 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
1164 cm = mtod(control, struct cmsghdr *);
1165 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
1166 || cm->cmsg_len > control->m_len) {
1171 error = udp_v4mapped_pktinfo(cm, &src, inp, flags);
1175 if (cm->cmsg_level != IPPROTO_IP)
1178 switch (cm->cmsg_type) {
1179 case IP_SENDSRCADDR:
1181 CMSG_LEN(sizeof(struct in_addr))) {
1185 bzero(&src, sizeof(src));
1186 src.sin_family = AF_INET;
1187 src.sin_len = sizeof(src);
1188 src.sin_port = inp->inp_lport;
1190 *(struct in_addr *)CMSG_DATA(cm);
1194 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
1198 tos = *(u_char *)CMSG_DATA(cm);
1202 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1206 flowid = *(uint32_t *) CMSG_DATA(cm);
1210 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1214 flowtype = *(uint32_t *) CMSG_DATA(cm);
1218 case IP_RSSBUCKETID:
1219 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1223 /* This is just a placeholder for now */
1227 error = ENOPROTOOPT;
1239 pr = inp->inp_socket->so_proto->pr_protocol;
1240 pcbinfo = udp_get_inpcbinfo(pr);
1243 * If the IP_SENDSRCADDR control message was specified, override the
1244 * source address for this datagram. Its use is invalidated if the
1245 * address thus specified is incomplete or clobbers other inpcbs.
1247 laddr = inp->inp_laddr;
1248 lport = inp->inp_lport;
1249 if (src.sin_family == AF_INET) {
1251 (laddr.s_addr == INADDR_ANY &&
1252 src.sin_addr.s_addr == INADDR_ANY)) {
1256 INP_HASH_WLOCK(pcbinfo);
1257 error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
1258 &laddr.s_addr, &lport, td->td_ucred);
1259 INP_HASH_WUNLOCK(pcbinfo);
1265 * If a UDP socket has been connected, then a local address/port will
1266 * have been selected and bound.
1268 * If a UDP socket has not been connected to, then an explicit
1269 * destination address must be used, in which case a local
1270 * address/port may not have been selected and bound.
1273 INP_LOCK_ASSERT(inp);
1274 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1280 * Jail may rewrite the destination address, so let it do
1281 * that before we use it.
1283 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1288 * If a local address or port hasn't yet been selected, or if
1289 * the destination address needs to be rewritten due to using
1290 * a special INADDR_ constant, invoke in_pcbconnect_setup()
1291 * to do the heavy lifting. Once a port is selected, we
1292 * commit the binding back to the socket; we also commit the
1293 * binding of the address if in jail.
1295 * If we already have a valid binding and we're not
1296 * requesting a destination address rewrite, use a fast path.
1298 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1299 inp->inp_lport == 0 ||
1300 sin->sin_addr.s_addr == INADDR_ANY ||
1301 sin->sin_addr.s_addr == INADDR_BROADCAST) {
1302 INP_HASH_WLOCK(pcbinfo);
1303 error = in_pcbconnect_setup(inp, addr, &laddr.s_addr,
1304 &lport, &faddr.s_addr, &fport, NULL,
1307 INP_HASH_WUNLOCK(pcbinfo);
1312 * XXXRW: Why not commit the port if the address is
1315 /* Commit the local port if newly assigned. */
1316 if (inp->inp_laddr.s_addr == INADDR_ANY &&
1317 inp->inp_lport == 0) {
1318 INP_WLOCK_ASSERT(inp);
1320 * Remember addr if jailed, to prevent
1323 if (prison_flag(td->td_ucred, PR_IP4))
1324 inp->inp_laddr = laddr;
1325 inp->inp_lport = lport;
1326 error = in_pcbinshash(inp);
1327 INP_HASH_WUNLOCK(pcbinfo);
1333 inp->inp_flags |= INP_ANONPORT;
1335 INP_HASH_WUNLOCK(pcbinfo);
1337 faddr = sin->sin_addr;
1338 fport = sin->sin_port;
1341 INP_LOCK_ASSERT(inp);
1342 faddr = inp->inp_faddr;
1343 fport = inp->inp_fport;
1344 if (faddr.s_addr == INADDR_ANY) {
1351 * Calculate data length and get a mbuf for UDP, IP, and possible
1352 * link-layer headers. Immediate slide the data pointer back forward
1353 * since we won't use that space at this layer.
1355 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT);
1360 m->m_data += max_linkhdr;
1361 m->m_len -= max_linkhdr;
1362 m->m_pkthdr.len -= max_linkhdr;
1365 * Fill in mbuf with extended UDP header and addresses and length put
1366 * into network format.
1368 ui = mtod(m, struct udpiphdr *);
1369 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1370 ui->ui_v = IPVERSION << 4;
1374 ui->ui_sport = lport;
1375 ui->ui_dport = fport;
1376 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1377 if (pr == IPPROTO_UDPLITE) {
1381 up = intoudpcb(inp);
1382 cscov = up->u_txcslen;
1383 plen = (u_short)len + sizeof(struct udphdr);
1386 ui->ui_len = htons(plen);
1387 ui->ui_ulen = htons(cscov);
1389 * For UDP-Lite, checksum coverage length of zero means
1390 * the entire UDPLite packet is covered by the checksum.
1392 cscov_partial = (cscov == 0) ? 0 : 1;
1396 * Set the Don't Fragment bit in the IP header.
1398 if (inp->inp_flags & INP_DONTFRAG) {
1401 ip = (struct ip *)&ui->ui_i;
1402 ip->ip_off |= htons(IP_DF);
1405 if (inp->inp_socket->so_options & SO_DONTROUTE)
1406 ipflags |= IP_ROUTETOIF;
1407 if (inp->inp_socket->so_options & SO_BROADCAST)
1408 ipflags |= IP_ALLOWBROADCAST;
1409 if (inp->inp_flags & INP_ONESBCAST)
1410 ipflags |= IP_SENDONES;
1413 mac_inpcb_create_mbuf(inp, m);
1417 * Set up checksum and output datagram.
1420 if (pr == IPPROTO_UDPLITE) {
1421 if (inp->inp_flags & INP_ONESBCAST)
1422 faddr.s_addr = INADDR_BROADCAST;
1423 if (cscov_partial) {
1424 if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
1425 ui->ui_sum = 0xffff;
1427 if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0)
1428 ui->ui_sum = 0xffff;
1430 } else if (V_udp_cksum) {
1431 if (inp->inp_flags & INP_ONESBCAST)
1432 faddr.s_addr = INADDR_BROADCAST;
1433 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1434 htons((u_short)len + sizeof(struct udphdr) + pr));
1435 m->m_pkthdr.csum_flags = CSUM_UDP;
1436 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1438 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len);
1439 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1440 ((struct ip *)ui)->ip_tos = tos; /* XXX */
1441 UDPSTAT_INC(udps_opackets);
1444 * Setup flowid / RSS information for outbound socket.
1446 * Once the UDP code decides to set a flowid some other way,
1447 * this allows the flowid to be overridden by userland.
1449 if (flowtype != M_HASHTYPE_NONE) {
1450 m->m_pkthdr.flowid = flowid;
1451 M_HASHTYPE_SET(m, flowtype);
1453 #if defined(ROUTE_MPATH) || defined(RSS)
1454 else if (CALC_FLOWID_OUTBOUND_SENDTO) {
1455 uint32_t hash_val, hash_type;
1457 hash_val = fib4_calc_packet_hash(laddr, faddr,
1458 lport, fport, pr, &hash_type);
1459 m->m_pkthdr.flowid = hash_val;
1460 M_HASHTYPE_SET(m, hash_type);
1464 * Don't override with the inp cached flowid value.
1466 * Depending upon the kind of send being done, the inp
1467 * flowid/flowtype values may actually not be appropriate
1468 * for this particular socket send.
1470 * We should either leave the flowid at zero (which is what is
1471 * currently done) or set it to some software generated
1472 * hash value based on the packet contents.
1474 ipflags |= IP_NODEFAULTFLOWID;
1477 if (pr == IPPROTO_UDPLITE)
1478 UDPLITE_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1480 UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1481 error = ip_output(m, inp->inp_options,
1482 INP_WLOCKED(inp) ? &inp->inp_route : NULL, ipflags,
1483 inp->inp_moptions, inp);
1495 pr_abort_t udp_abort; /* shared with udp6_usrreq.c */
1497 udp_abort(struct socket *so)
1500 struct inpcbinfo *pcbinfo;
1502 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1503 inp = sotoinpcb(so);
1504 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1506 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1507 INP_HASH_WLOCK(pcbinfo);
1508 in_pcbdisconnect(inp);
1509 inp->inp_laddr.s_addr = INADDR_ANY;
1510 INP_HASH_WUNLOCK(pcbinfo);
1511 soisdisconnected(so);
1517 udp_attach(struct socket *so, int proto, struct thread *td)
1519 static uint32_t udp_flowid;
1521 struct inpcbinfo *pcbinfo;
1524 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1525 inp = sotoinpcb(so);
1526 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1527 error = soreserve(so, udp_sendspace, udp_recvspace);
1530 error = in_pcballoc(so, pcbinfo);
1534 inp = sotoinpcb(so);
1535 inp->inp_ip_ttl = V_ip_defttl;
1536 inp->inp_flowid = atomic_fetchadd_int(&udp_flowid, 1);
1537 inp->inp_flowtype = M_HASHTYPE_OPAQUE;
1539 error = udp_newudpcb(inp);
1552 udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx)
1557 KASSERT(so->so_type == SOCK_DGRAM,
1558 ("udp_set_kernel_tunneling: !dgram"));
1559 inp = sotoinpcb(so);
1560 KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL"));
1562 up = intoudpcb(inp);
1563 if ((f != NULL || i != NULL) && ((up->u_tun_func != NULL) ||
1564 (up->u_icmp_func != NULL))) {
1569 up->u_icmp_func = i;
1570 up->u_tun_ctx = ctx;
1577 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1580 struct inpcbinfo *pcbinfo;
1581 struct sockaddr_in *sinp;
1584 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1585 inp = sotoinpcb(so);
1586 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1588 sinp = (struct sockaddr_in *)nam;
1589 if (nam->sa_family != AF_INET) {
1591 * Preserve compatibility with old programs.
1593 if (nam->sa_family != AF_UNSPEC ||
1594 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) ||
1595 sinp->sin_addr.s_addr != INADDR_ANY)
1596 return (EAFNOSUPPORT);
1597 nam->sa_family = AF_INET;
1599 if (nam->sa_len != sizeof(struct sockaddr_in))
1603 INP_HASH_WLOCK(pcbinfo);
1604 error = in_pcbbind(inp, nam, td->td_ucred);
1605 INP_HASH_WUNLOCK(pcbinfo);
1611 udp_close(struct socket *so)
1614 struct inpcbinfo *pcbinfo;
1616 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1617 inp = sotoinpcb(so);
1618 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1620 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1621 INP_HASH_WLOCK(pcbinfo);
1622 in_pcbdisconnect(inp);
1623 inp->inp_laddr.s_addr = INADDR_ANY;
1624 INP_HASH_WUNLOCK(pcbinfo);
1625 soisdisconnected(so);
1631 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1633 struct epoch_tracker et;
1635 struct inpcbinfo *pcbinfo;
1636 struct sockaddr_in *sin;
1639 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1640 inp = sotoinpcb(so);
1641 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1643 sin = (struct sockaddr_in *)nam;
1644 if (sin->sin_family != AF_INET)
1645 return (EAFNOSUPPORT);
1646 if (sin->sin_len != sizeof(*sin))
1650 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1654 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1659 NET_EPOCH_ENTER(et);
1660 INP_HASH_WLOCK(pcbinfo);
1661 error = in_pcbconnect(inp, nam, td->td_ucred, true);
1662 INP_HASH_WUNLOCK(pcbinfo);
1671 udp_detach(struct socket *so)
1676 inp = sotoinpcb(so);
1677 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1678 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1679 ("udp_detach: not disconnected"));
1681 up = intoudpcb(inp);
1682 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1683 inp->inp_ppcb = NULL;
1689 pr_disconnect_t udp_disconnect; /* shared with udp6_usrreq.c */
1691 udp_disconnect(struct socket *so)
1694 struct inpcbinfo *pcbinfo;
1696 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1697 inp = sotoinpcb(so);
1698 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1700 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1704 INP_HASH_WLOCK(pcbinfo);
1705 in_pcbdisconnect(inp);
1706 inp->inp_laddr.s_addr = INADDR_ANY;
1707 INP_HASH_WUNLOCK(pcbinfo);
1709 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1715 pr_send_t udp_send; /* shared with udp6_usrreq.c */
1717 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1718 struct mbuf *control, struct thread *td)
1723 inp = sotoinpcb(so);
1724 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1728 if (addr->sa_family != AF_INET)
1729 error = EAFNOSUPPORT;
1730 else if (addr->sa_len != sizeof(struct sockaddr_in))
1732 if (__predict_false(error != 0)) {
1738 return (udp_output(inp, m, addr, control, td, flags));
1743 udp_shutdown(struct socket *so)
1747 inp = sotoinpcb(so);
1748 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1756 #define UDP_PROTOSW \
1757 .pr_type = SOCK_DGRAM, \
1758 .pr_flags = PR_ATOMIC | PR_ADDR | PR_CAPATTACH, \
1759 .pr_ctloutput = udp_ctloutput, \
1760 .pr_abort = udp_abort, \
1761 .pr_attach = udp_attach, \
1762 .pr_bind = udp_bind, \
1763 .pr_connect = udp_connect, \
1764 .pr_control = in_control, \
1765 .pr_detach = udp_detach, \
1766 .pr_disconnect = udp_disconnect, \
1767 .pr_peeraddr = in_getpeeraddr, \
1768 .pr_send = udp_send, \
1769 .pr_soreceive = soreceive_dgram, \
1770 .pr_sosend = sosend_dgram, \
1771 .pr_shutdown = udp_shutdown, \
1772 .pr_sockaddr = in_getsockaddr, \
1773 .pr_sosetlabel = in_pcbsosetlabel, \
1774 .pr_close = udp_close
1776 struct protosw udp_protosw = {
1777 .pr_protocol = IPPROTO_UDP,
1781 struct protosw udplite_protosw = {
1782 .pr_protocol = IPPROTO_UDPLITE,
1787 udp_init(void *arg __unused)
1790 IPPROTO_REGISTER(IPPROTO_UDP, udp_input, udp_ctlinput);
1791 IPPROTO_REGISTER(IPPROTO_UDPLITE, udp_input, udplite_ctlinput);
1793 SYSINIT(udp_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, udp_init, NULL);