2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
3 * The Regents of the University of California.
4 * Copyright (c) 2008 Robert N. M. Watson
5 * Copyright (c) 2010-2011 Juniper Networks, Inc.
6 * Copyright (c) 2014 Kevin Lo
9 * Portions of this software were developed by Robert N. M. Watson under
10 * contract to Juniper Networks, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
43 #include "opt_inet6.h"
44 #include "opt_ipsec.h"
47 #include <sys/param.h>
48 #include <sys/domain.h>
49 #include <sys/eventhandler.h>
51 #include <sys/kernel.h>
53 #include <sys/malloc.h>
57 #include <sys/protosw.h>
59 #include <sys/signalvar.h>
60 #include <sys/socket.h>
61 #include <sys/socketvar.h>
63 #include <sys/sysctl.h>
64 #include <sys/syslog.h>
65 #include <sys/systm.h>
70 #include <net/if_var.h>
71 #include <net/route.h>
72 #include <net/rss_config.h>
74 #include <netinet/in.h>
75 #include <netinet/in_kdtrace.h>
76 #include <netinet/in_pcb.h>
77 #include <netinet/in_systm.h>
78 #include <netinet/in_var.h>
79 #include <netinet/ip.h>
81 #include <netinet/ip6.h>
83 #include <netinet/ip_icmp.h>
84 #include <netinet/icmp_var.h>
85 #include <netinet/ip_var.h>
86 #include <netinet/ip_options.h>
88 #include <netinet6/ip6_var.h>
90 #include <netinet/udp.h>
91 #include <netinet/udp_var.h>
92 #include <netinet/udplite.h>
93 #include <netinet/in_rss.h>
95 #include <netipsec/ipsec_support.h>
97 #include <machine/in_cksum.h>
99 #include <security/mac/mac_framework.h>
102 * UDP and UDP-Lite protocols implementation.
103 * Per RFC 768, August, 1980.
104 * Per RFC 3828, July, 2004.
108 * BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
109 * removes the only data integrity mechanism for packets and malformed
110 * packets that would otherwise be discarded due to bad checksums, and may
111 * cause problems (especially for NFS data blocks).
113 VNET_DEFINE(int, udp_cksum) = 1;
114 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_VNET | CTLFLAG_RW,
115 &VNET_NAME(udp_cksum), 0, "compute udp checksum");
117 int udp_log_in_vain = 0;
118 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
119 &udp_log_in_vain, 0, "Log all incoming UDP packets");
121 VNET_DEFINE(int, udp_blackhole) = 0;
122 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_VNET | CTLFLAG_RW,
123 &VNET_NAME(udp_blackhole), 0,
124 "Do not send port unreachables for refused connects");
126 u_long udp_sendspace = 9216; /* really max datagram size */
127 SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
128 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
130 u_long udp_recvspace = 40 * (1024 +
132 sizeof(struct sockaddr_in6)
134 sizeof(struct sockaddr_in)
136 ); /* 40 1K datagrams */
138 SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
139 &udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
141 VNET_DEFINE(struct inpcbhead, udb); /* from udp_var.h */
142 VNET_DEFINE(struct inpcbinfo, udbinfo);
143 VNET_DEFINE(struct inpcbhead, ulitecb);
144 VNET_DEFINE(struct inpcbinfo, ulitecbinfo);
145 static VNET_DEFINE(uma_zone_t, udpcb_zone);
146 #define V_udpcb_zone VNET(udpcb_zone)
149 #define UDBHASHSIZE 128
152 VNET_PCPUSTAT_DEFINE(struct udpstat, udpstat); /* from udp_var.h */
153 VNET_PCPUSTAT_SYSINIT(udpstat);
154 SYSCTL_VNET_PCPUSTAT(_net_inet_udp, UDPCTL_STATS, stats, struct udpstat,
155 udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
158 VNET_PCPUSTAT_SYSUNINIT(udpstat);
161 static void udp_detach(struct socket *so);
162 static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
163 struct mbuf *, struct thread *);
167 udp_zone_change(void *tag)
170 uma_zone_set_max(V_udbinfo.ipi_zone, maxsockets);
171 uma_zone_set_max(V_udpcb_zone, maxsockets);
175 udp_inpcb_init(void *mem, int size, int flags)
180 INP_LOCK_INIT(inp, "inp", "udpinp");
185 udplite_inpcb_init(void *mem, int size, int flags)
190 INP_LOCK_INIT(inp, "inp", "udpliteinp");
199 * For now default to 2-tuple UDP hashing - until the fragment
200 * reassembly code can also update the flowid.
202 * Once we can calculate the flowid that way and re-establish
203 * a 4-tuple, flip this to 4-tuple.
205 in_pcbinfo_init(&V_udbinfo, "udp", &V_udb, UDBHASHSIZE, UDBHASHSIZE,
206 "udp_inpcb", udp_inpcb_init, IPI_HASHFIELDS_2TUPLE);
207 V_udpcb_zone = uma_zcreate("udpcb", sizeof(struct udpcb),
208 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
209 uma_zone_set_max(V_udpcb_zone, maxsockets);
210 uma_zone_set_warning(V_udpcb_zone, "kern.ipc.maxsockets limit reached");
211 EVENTHANDLER_REGISTER(maxsockets_change, udp_zone_change, NULL,
212 EVENTHANDLER_PRI_ANY);
219 in_pcbinfo_init(&V_ulitecbinfo, "udplite", &V_ulitecb, UDBHASHSIZE,
220 UDBHASHSIZE, "udplite_inpcb", udplite_inpcb_init,
221 IPI_HASHFIELDS_2TUPLE);
225 * Kernel module interface for updating udpstat. The argument is an index
226 * into udpstat treated as an array of u_long. While this encodes the
227 * general layout of udpstat into the caller, it doesn't encode its location,
228 * so that future changes to add, for example, per-CPU stats support won't
229 * cause binary compatibility problems for kernel modules.
232 kmod_udpstat_inc(int statnum)
235 counter_u64_add(VNET(udpstat)[statnum], 1);
239 udp_newudpcb(struct inpcb *inp)
243 up = uma_zalloc(V_udpcb_zone, M_NOWAIT | M_ZERO);
251 udp_discardcb(struct udpcb *up)
254 uma_zfree(V_udpcb_zone, up);
259 udp_destroy(void *unused __unused)
262 in_pcbinfo_destroy(&V_udbinfo);
263 uma_zdestroy(V_udpcb_zone);
265 VNET_SYSUNINIT(udp, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udp_destroy, NULL);
268 udplite_destroy(void *unused __unused)
271 in_pcbinfo_destroy(&V_ulitecbinfo);
273 VNET_SYSUNINIT(udplite, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, udplite_destroy,
279 * Subroutine of udp_input(), which appends the provided mbuf chain to the
280 * passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
281 * contains the source address. If the socket ends up being an IPv6 socket,
282 * udp_append() will convert to a sockaddr_in6 before passing the address
283 * into the socket code.
285 * In the normal case udp_append() will return 0, indicating that you
286 * must unlock the inp. However if a tunneling protocol is in place we increment
287 * the inpcb refcnt and unlock the inp, on return from the tunneling protocol we
288 * then decrement the reference count. If the inp_rele returns 1, indicating the
289 * inp is gone, we return that to the caller to tell them *not* to unlock
290 * the inp. In the case of multi-cast this will cause the distribution
291 * to stop (though most tunneling protocols known currently do *not* use
295 udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
296 struct sockaddr_in *udp_in)
298 struct sockaddr *append_sa;
300 struct mbuf *tmpopts, *opts = NULL;
302 struct sockaddr_in6 udp_in6;
306 INP_LOCK_ASSERT(inp);
309 * Engage the tunneling protocol.
312 if (up->u_tun_func != NULL) {
315 (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&udp_in[0],
318 return (in_pcbrele_rlocked(inp));
321 off += sizeof(struct udphdr);
323 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
324 /* Check AH/ESP integrity. */
325 if (IPSEC_ENABLED(ipv4) &&
326 IPSEC_CHECK_POLICY(ipv4, n, inp) != 0) {
330 if (up->u_flags & UF_ESPINUDP) {/* IPSec UDP encaps. */
331 if (IPSEC_ENABLED(ipv4) &&
332 UDPENCAP_INPUT(n, off, AF_INET) != 0)
333 return (0); /* Consumed. */
337 if (mac_inpcb_check_deliver(inp, n) != 0) {
342 if (inp->inp_flags & INP_CONTROLOPTS ||
343 inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
345 if (inp->inp_vflag & INP_IPV6)
346 (void)ip6_savecontrol_v4(inp, n, &opts, NULL);
349 ip_savecontrol(inp, &opts, ip, n);
351 if ((inp->inp_vflag & INP_IPV4) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
352 tmpopts = sbcreatecontrol((caddr_t)&udp_in[1],
353 sizeof(struct sockaddr_in), IP_ORIGDSTADDR, IPPROTO_IP);
356 tmpopts->m_next = opts;
363 if (inp->inp_vflag & INP_IPV6) {
364 bzero(&udp_in6, sizeof(udp_in6));
365 udp_in6.sin6_len = sizeof(udp_in6);
366 udp_in6.sin6_family = AF_INET6;
367 in6_sin_2_v4mapsin6(&udp_in[0], &udp_in6);
368 append_sa = (struct sockaddr *)&udp_in6;
371 append_sa = (struct sockaddr *)&udp_in[0];
374 so = inp->inp_socket;
375 SOCKBUF_LOCK(&so->so_rcv);
376 if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
377 SOCKBUF_UNLOCK(&so->so_rcv);
381 UDPSTAT_INC(udps_fullsock);
383 sorwakeup_locked(so);
388 udp_input(struct mbuf **mp, int *offp, int proto)
394 uint16_t len, ip_len;
395 struct inpcbinfo *pcbinfo;
397 struct sockaddr_in udp_in[2];
399 struct m_tag *fwd_tag;
400 int cscov_partial, iphlen;
404 ifp = m->m_pkthdr.rcvif;
406 UDPSTAT_INC(udps_ipackets);
409 * Strip IP options, if any; should skip this, make available to
410 * user, and use on returned packets, but we don't yet have a way to
411 * check the checksum with options still present.
413 if (iphlen > sizeof (struct ip)) {
415 iphlen = sizeof(struct ip);
419 * Get IP and UDP header together in first mbuf.
421 ip = mtod(m, struct ip *);
422 if (m->m_len < iphlen + sizeof(struct udphdr)) {
423 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == NULL) {
424 UDPSTAT_INC(udps_hdrops);
425 return (IPPROTO_DONE);
427 ip = mtod(m, struct ip *);
429 uh = (struct udphdr *)((caddr_t)ip + iphlen);
430 cscov_partial = (proto == IPPROTO_UDPLITE) ? 1 : 0;
433 * Destination port of 0 is illegal, based on RFC768.
435 if (uh->uh_dport == 0)
439 * Construct sockaddr format source address. Stuff source address
440 * and datagram in user buffer.
442 bzero(&udp_in[0], sizeof(struct sockaddr_in) * 2);
443 udp_in[0].sin_len = sizeof(struct sockaddr_in);
444 udp_in[0].sin_family = AF_INET;
445 udp_in[0].sin_port = uh->uh_sport;
446 udp_in[0].sin_addr = ip->ip_src;
447 udp_in[1].sin_len = sizeof(struct sockaddr_in);
448 udp_in[1].sin_family = AF_INET;
449 udp_in[1].sin_port = uh->uh_dport;
450 udp_in[1].sin_addr = ip->ip_dst;
453 * Make mbuf data length reflect UDP length. If not enough data to
454 * reflect UDP length, drop.
456 len = ntohs((u_short)uh->uh_ulen);
457 ip_len = ntohs(ip->ip_len) - iphlen;
458 if (proto == IPPROTO_UDPLITE && (len == 0 || len == ip_len)) {
459 /* Zero means checksum over the complete packet. */
465 if (len > ip_len || len < sizeof(struct udphdr)) {
466 UDPSTAT_INC(udps_badlen);
469 if (proto == IPPROTO_UDP)
470 m_adj(m, len - ip_len);
474 * Save a copy of the IP header in case we want restore it for
475 * sending an ICMP error message in response.
477 if (!V_udp_blackhole)
480 memset(&save_ip, 0, sizeof(save_ip));
483 * Checksum extended UDP header and data.
488 if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID) &&
490 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
491 uh_sum = m->m_pkthdr.csum_data;
493 uh_sum = in_pseudo(ip->ip_src.s_addr,
494 ip->ip_dst.s_addr, htonl((u_short)len +
495 m->m_pkthdr.csum_data + proto));
500 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
501 bzero(((struct ipovly *)ip)->ih_x1, 9);
502 ((struct ipovly *)ip)->ih_len = (proto == IPPROTO_UDP) ?
503 uh->uh_ulen : htons(ip_len);
504 uh_sum = in_cksum(m, len + sizeof (struct ip));
505 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
508 UDPSTAT_INC(udps_badsum);
510 return (IPPROTO_DONE);
513 if (proto == IPPROTO_UDP) {
514 UDPSTAT_INC(udps_nosum);
516 /* UDPLite requires a checksum */
517 /* XXX: What is the right UDPLite MIB counter here? */
519 return (IPPROTO_DONE);
523 pcbinfo = udp_get_inpcbinfo(proto);
524 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
525 in_broadcast(ip->ip_dst, ifp)) {
527 struct inpcbhead *pcblist;
528 struct ip_moptions *imo;
530 INP_INFO_RLOCK(pcbinfo);
531 pcblist = udp_get_pcblist(proto);
533 LIST_FOREACH(inp, pcblist, inp_list) {
534 if (inp->inp_lport != uh->uh_dport)
537 if ((inp->inp_vflag & INP_IPV4) == 0)
540 if (inp->inp_laddr.s_addr != INADDR_ANY &&
541 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
543 if (inp->inp_faddr.s_addr != INADDR_ANY &&
544 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
546 if (inp->inp_fport != 0 &&
547 inp->inp_fport != uh->uh_sport)
553 * XXXRW: Because we weren't holding either the inpcb
554 * or the hash lock when we checked for a match
555 * before, we should probably recheck now that the
556 * inpcb lock is held.
560 * Handle socket delivery policy for any-source
561 * and source-specific multicast. [RFC3678]
563 imo = inp->inp_moptions;
564 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
565 struct sockaddr_in group;
571 bzero(&group, sizeof(struct sockaddr_in));
572 group.sin_len = sizeof(struct sockaddr_in);
573 group.sin_family = AF_INET;
574 group.sin_addr = ip->ip_dst;
576 blocked = imo_multi_filter(imo, ifp,
577 (struct sockaddr *)&group,
578 (struct sockaddr *)&udp_in[0]);
579 if (blocked != MCAST_PASS) {
580 if (blocked == MCAST_NOTGMEMBER)
581 IPSTAT_INC(ips_notmember);
582 if (blocked == MCAST_NOTSMEMBER ||
583 blocked == MCAST_MUTED)
584 UDPSTAT_INC(udps_filtermcast);
592 if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) !=
594 UDP_PROBE(receive, NULL, last, ip,
596 if (udp_append(last, ip, n, iphlen,
605 * Don't look for additional matches if this one does
606 * not have either the SO_REUSEPORT or SO_REUSEADDR
607 * socket options set. This heuristic avoids
608 * searching through all pcbs in the common case of a
609 * non-shared port. It assumes that an application
610 * will never clear these options after setting them.
612 if ((last->inp_socket->so_options &
613 (SO_REUSEPORT|SO_REUSEADDR)) == 0)
619 * No matching pcb found; discard datagram. (No need
620 * to send an ICMP Port Unreachable for a broadcast
621 * or multicast datgram.)
623 UDPSTAT_INC(udps_noportbcast);
626 INP_INFO_RUNLOCK(pcbinfo);
629 UDP_PROBE(receive, NULL, last, ip, last, uh);
630 if (udp_append(last, ip, m, iphlen, udp_in) == 0)
633 INP_INFO_RUNLOCK(pcbinfo);
634 return (IPPROTO_DONE);
638 * Locate pcb for datagram.
642 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
644 if ((m->m_flags & M_IP_NEXTHOP) &&
645 (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
646 struct sockaddr_in *next_hop;
648 next_hop = (struct sockaddr_in *)(fwd_tag + 1);
651 * Transparently forwarded. Pretend to be the destination.
652 * Already got one like this?
654 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
655 ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
658 * It's new. Try to find the ambushing socket.
659 * Because we've rewritten the destination address,
660 * any hardware-generated hash is ignored.
662 inp = in_pcblookup(pcbinfo, ip->ip_src,
663 uh->uh_sport, next_hop->sin_addr,
664 next_hop->sin_port ? htons(next_hop->sin_port) :
665 uh->uh_dport, INPLOOKUP_WILDCARD |
666 INPLOOKUP_RLOCKPCB, ifp);
668 /* Remove the tag from the packet. We don't need it anymore. */
669 m_tag_delete(m, fwd_tag);
670 m->m_flags &= ~M_IP_NEXTHOP;
672 inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
673 ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
674 INPLOOKUP_RLOCKPCB, ifp, m);
676 if (udp_log_in_vain) {
677 char src[INET_ADDRSTRLEN];
678 char dst[INET_ADDRSTRLEN];
681 "Connection attempt to UDP %s:%d from %s:%d\n",
682 inet_ntoa_r(ip->ip_dst, dst), ntohs(uh->uh_dport),
683 inet_ntoa_r(ip->ip_src, src), ntohs(uh->uh_sport));
685 UDPSTAT_INC(udps_noport);
686 if (m->m_flags & (M_BCAST | M_MCAST)) {
687 UDPSTAT_INC(udps_noportbcast);
692 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
695 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
696 return (IPPROTO_DONE);
700 * Check the minimum TTL for socket.
702 INP_RLOCK_ASSERT(inp);
703 if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl) {
706 return (IPPROTO_DONE);
712 if (up->u_rxcslen == 0 || up->u_rxcslen > len) {
715 return (IPPROTO_DONE);
719 UDP_PROBE(receive, NULL, inp, ip, inp, uh);
720 if (udp_append(inp, ip, m, iphlen, udp_in) == 0)
722 return (IPPROTO_DONE);
726 return (IPPROTO_DONE);
731 * Notify a udp user of an asynchronous error; just wake up so that they can
732 * collect error status.
735 udp_notify(struct inpcb *inp, int errno)
739 * While udp_ctlinput() always calls udp_notify() with a read lock
740 * when invoking it directly, in_pcbnotifyall() currently uses write
741 * locks due to sharing code with TCP. For now, accept either a read
742 * or a write lock, but a read lock is sufficient.
744 INP_LOCK_ASSERT(inp);
745 if ((errno == EHOSTUNREACH || errno == ENETUNREACH ||
746 errno == EHOSTDOWN) && inp->inp_route.ro_rt) {
747 RTFREE(inp->inp_route.ro_rt);
748 inp->inp_route.ro_rt = (struct rtentry *)NULL;
751 inp->inp_socket->so_error = errno;
752 sorwakeup(inp->inp_socket);
753 sowwakeup(inp->inp_socket);
759 udp_common_ctlinput(int cmd, struct sockaddr *sa, void *vip,
760 struct inpcbinfo *pcbinfo)
764 struct in_addr faddr;
767 faddr = ((struct sockaddr_in *)sa)->sin_addr;
768 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
771 if (PRC_IS_REDIRECT(cmd)) {
772 /* signal EHOSTDOWN, as it flushes the cached route */
773 in_pcbnotifyall(&V_udbinfo, faddr, EHOSTDOWN, udp_notify);
778 * Hostdead is ugly because it goes linearly through all PCBs.
780 * XXX: We never get this from ICMP, otherwise it makes an excellent
781 * DoS attack on machines with many connections.
783 if (cmd == PRC_HOSTDEAD)
785 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
788 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
789 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
790 ip->ip_src, uh->uh_sport, INPLOOKUP_RLOCKPCB, NULL);
792 INP_RLOCK_ASSERT(inp);
793 if (inp->inp_socket != NULL) {
794 udp_notify(inp, inetctlerrmap[cmd]);
798 inp = in_pcblookup(pcbinfo, faddr, uh->uh_dport,
799 ip->ip_src, uh->uh_sport,
800 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
805 if (up->u_icmp_func != NULL) {
807 (*up->u_icmp_func)(cmd, sa, vip, up->u_tun_ctx);
814 in_pcbnotifyall(pcbinfo, faddr, inetctlerrmap[cmd],
818 udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
821 return (udp_common_ctlinput(cmd, sa, vip, &V_udbinfo));
825 udplite_ctlinput(int cmd, struct sockaddr *sa, void *vip)
828 return (udp_common_ctlinput(cmd, sa, vip, &V_ulitecbinfo));
833 udp_pcblist(SYSCTL_HANDLER_ARGS)
836 struct inpcb *inp, **inp_list;
841 * The process of preparing the PCB list is too time-consuming and
842 * resource-intensive to repeat twice on every request.
844 if (req->oldptr == 0) {
845 n = V_udbinfo.ipi_count;
846 n += imax(n / 8, 10);
847 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
851 if (req->newptr != 0)
855 * OK, now we're committed to doing something.
857 INP_INFO_RLOCK(&V_udbinfo);
858 gencnt = V_udbinfo.ipi_gencnt;
859 n = V_udbinfo.ipi_count;
860 INP_INFO_RUNLOCK(&V_udbinfo);
862 error = sysctl_wire_old_buffer(req, 2 * (sizeof xig)
863 + n * sizeof(struct xinpcb));
867 xig.xig_len = sizeof xig;
869 xig.xig_gen = gencnt;
870 xig.xig_sogen = so_gencnt;
871 error = SYSCTL_OUT(req, &xig, sizeof xig);
875 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
876 if (inp_list == NULL)
879 INP_INFO_RLOCK(&V_udbinfo);
880 for (inp = LIST_FIRST(V_udbinfo.ipi_listhead), i = 0; inp && i < n;
881 inp = LIST_NEXT(inp, inp_list)) {
883 if (inp->inp_gencnt <= gencnt &&
884 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
890 INP_INFO_RUNLOCK(&V_udbinfo);
894 for (i = 0; i < n; i++) {
897 if (inp->inp_gencnt <= gencnt) {
900 in_pcbtoxinpcb(inp, &xi);
902 error = SYSCTL_OUT(req, &xi, sizeof xi);
906 INP_INFO_WLOCK(&V_udbinfo);
907 for (i = 0; i < n; i++) {
910 if (!in_pcbrele_rlocked(inp))
913 INP_INFO_WUNLOCK(&V_udbinfo);
917 * Give the user an updated idea of our state. If the
918 * generation differs from what we told her before, she knows
919 * that something happened while we were processing this
920 * request, and it might be necessary to retry.
922 INP_INFO_RLOCK(&V_udbinfo);
923 xig.xig_gen = V_udbinfo.ipi_gencnt;
924 xig.xig_sogen = so_gencnt;
925 xig.xig_count = V_udbinfo.ipi_count;
926 INP_INFO_RUNLOCK(&V_udbinfo);
927 error = SYSCTL_OUT(req, &xig, sizeof xig);
929 free(inp_list, M_TEMP);
933 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist,
934 CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0,
935 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
939 udp_getcred(SYSCTL_HANDLER_ARGS)
942 struct sockaddr_in addrs[2];
946 error = priv_check(req->td, PRIV_NETINET_GETCRED);
949 error = SYSCTL_IN(req, addrs, sizeof(addrs));
952 inp = in_pcblookup(&V_udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
953 addrs[0].sin_addr, addrs[0].sin_port,
954 INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
956 INP_RLOCK_ASSERT(inp);
957 if (inp->inp_socket == NULL)
960 error = cr_canseeinpcb(req->td->td_ucred, inp);
962 cru2x(inp->inp_cred, &xuc);
967 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
971 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
972 CTLTYPE_OPAQUE|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0,
973 udp_getcred, "S,xucred", "Get the xucred of a UDP connection");
977 udp_ctloutput(struct socket *so, struct sockopt *sopt)
981 int isudplite, error, optval;
984 isudplite = (so->so_proto->pr_protocol == IPPROTO_UDPLITE) ? 1 : 0;
986 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
988 if (sopt->sopt_level != so->so_proto->pr_protocol) {
990 if (INP_CHECK_SOCKAF(so, AF_INET6)) {
992 error = ip6_ctloutput(so, sopt);
995 #if defined(INET) && defined(INET6)
1001 error = ip_ctloutput(so, sopt);
1007 switch (sopt->sopt_dir) {
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;
1029 error = sooptcopyin(sopt, &optval, sizeof(optval),
1033 inp = sotoinpcb(so);
1034 KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
1036 up = intoudpcb(inp);
1037 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1038 if ((optval != 0 && optval < 8) || (optval > 65535)) {
1043 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1044 up->u_txcslen = optval;
1046 up->u_rxcslen = optval;
1051 error = ENOPROTOOPT;
1056 switch (sopt->sopt_name) {
1057 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
1060 if (!IPSEC_ENABLED(ipv4)) {
1062 return (ENOPROTOOPT);
1064 error = UDPENCAP_PCBCTL(inp, sopt);
1068 case UDPLITE_SEND_CSCOV:
1069 case UDPLITE_RECV_CSCOV:
1072 error = ENOPROTOOPT;
1075 up = intoudpcb(inp);
1076 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1077 if (sopt->sopt_name == UDPLITE_SEND_CSCOV)
1078 optval = up->u_txcslen;
1080 optval = up->u_rxcslen;
1082 error = sooptcopyout(sopt, &optval, sizeof(optval));
1086 error = ENOPROTOOPT;
1095 #define UH_WLOCKED 2
1096 #define UH_RLOCKED 1
1097 #define UH_UNLOCKED 0
1099 udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
1100 struct mbuf *control, struct thread *td)
1102 struct udpiphdr *ui;
1103 int len = m->m_pkthdr.len;
1104 struct in_addr faddr, laddr;
1106 struct inpcbinfo *pcbinfo;
1107 struct sockaddr_in *sin, src;
1108 int cscov_partial = 0;
1111 u_short fport, lport;
1112 int unlock_udbinfo, unlock_inp;
1116 uint32_t flowid = 0;
1117 uint8_t flowtype = M_HASHTYPE_NONE;
1120 * udp_output() may need to temporarily bind or connect the current
1121 * inpcb. As such, we don't know up front whether we will need the
1122 * pcbinfo lock or not. Do any work to decide what is needed up
1123 * front before acquiring any locks.
1125 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1133 sin = (struct sockaddr_in *)addr;
1135 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0)) {
1137 unlock_inp = UH_WLOCKED;
1140 unlock_inp = UH_RLOCKED;
1142 tos = inp->inp_ip_tos;
1143 if (control != NULL) {
1145 * XXX: Currently, we assume all the optional information is
1146 * stored in a single mbuf.
1148 if (control->m_next) {
1149 if (unlock_inp == UH_WLOCKED)
1157 for (; control->m_len > 0;
1158 control->m_data += CMSG_ALIGN(cm->cmsg_len),
1159 control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
1160 cm = mtod(control, struct cmsghdr *);
1161 if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
1162 || cm->cmsg_len > control->m_len) {
1166 if (cm->cmsg_level != IPPROTO_IP)
1169 switch (cm->cmsg_type) {
1170 case IP_SENDSRCADDR:
1172 CMSG_LEN(sizeof(struct in_addr))) {
1176 bzero(&src, sizeof(src));
1177 src.sin_family = AF_INET;
1178 src.sin_len = sizeof(src);
1179 src.sin_port = inp->inp_lport;
1181 *(struct in_addr *)CMSG_DATA(cm);
1185 if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
1189 tos = *(u_char *)CMSG_DATA(cm);
1193 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1197 flowid = *(uint32_t *) CMSG_DATA(cm);
1201 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1205 flowtype = *(uint32_t *) CMSG_DATA(cm);
1209 case IP_RSSBUCKETID:
1210 if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
1214 /* This is just a placeholder for now */
1218 error = ENOPROTOOPT;
1227 if (unlock_inp == UH_WLOCKED)
1236 * Depending on whether or not the application has bound or connected
1237 * the socket, we may have to do varying levels of work. The optimal
1238 * case is for a connected UDP socket, as a global lock isn't
1241 * In order to decide which we need, we require stability of the
1242 * inpcb binding, which we ensure by acquiring a read lock on the
1243 * inpcb. This doesn't strictly follow the lock order, so we play
1244 * the trylock and retry game; note that we may end up with more
1245 * conservative locks than required the second time around, so later
1246 * assertions have to accept that. Further analysis of the number of
1247 * misses under contention is required.
1249 * XXXRW: Check that hash locking update here is correct.
1251 pr = inp->inp_socket->so_proto->pr_protocol;
1252 pcbinfo = udp_get_inpcbinfo(pr);
1253 sin = (struct sockaddr_in *)addr;
1255 (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0)) {
1256 INP_HASH_WLOCK(pcbinfo);
1257 unlock_udbinfo = UH_WLOCKED;
1258 } else if ((sin != NULL && (
1259 (sin->sin_addr.s_addr == INADDR_ANY) ||
1260 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
1261 (inp->inp_laddr.s_addr == INADDR_ANY) ||
1262 (inp->inp_lport == 0))) ||
1263 (src.sin_family == AF_INET)) {
1264 INP_HASH_RLOCK(pcbinfo);
1265 unlock_udbinfo = UH_RLOCKED;
1267 unlock_udbinfo = UH_UNLOCKED;
1270 * If the IP_SENDSRCADDR control message was specified, override the
1271 * source address for this datagram. Its use is invalidated if the
1272 * address thus specified is incomplete or clobbers other inpcbs.
1274 laddr = inp->inp_laddr;
1275 lport = inp->inp_lport;
1276 if (src.sin_family == AF_INET) {
1277 INP_HASH_LOCK_ASSERT(pcbinfo);
1279 (laddr.s_addr == INADDR_ANY &&
1280 src.sin_addr.s_addr == INADDR_ANY)) {
1284 error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
1285 &laddr.s_addr, &lport, td->td_ucred);
1291 * If a UDP socket has been connected, then a local address/port will
1292 * have been selected and bound.
1294 * If a UDP socket has not been connected to, then an explicit
1295 * destination address must be used, in which case a local
1296 * address/port may not have been selected and bound.
1299 INP_LOCK_ASSERT(inp);
1300 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1306 * Jail may rewrite the destination address, so let it do
1307 * that before we use it.
1309 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1314 * If a local address or port hasn't yet been selected, or if
1315 * the destination address needs to be rewritten due to using
1316 * a special INADDR_ constant, invoke in_pcbconnect_setup()
1317 * to do the heavy lifting. Once a port is selected, we
1318 * commit the binding back to the socket; we also commit the
1319 * binding of the address if in jail.
1321 * If we already have a valid binding and we're not
1322 * requesting a destination address rewrite, use a fast path.
1324 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1325 inp->inp_lport == 0 ||
1326 sin->sin_addr.s_addr == INADDR_ANY ||
1327 sin->sin_addr.s_addr == INADDR_BROADCAST) {
1328 INP_HASH_LOCK_ASSERT(pcbinfo);
1329 error = in_pcbconnect_setup(inp, addr, &laddr.s_addr,
1330 &lport, &faddr.s_addr, &fport, NULL,
1336 * XXXRW: Why not commit the port if the address is
1339 /* Commit the local port if newly assigned. */
1340 if (inp->inp_laddr.s_addr == INADDR_ANY &&
1341 inp->inp_lport == 0) {
1342 INP_WLOCK_ASSERT(inp);
1343 INP_HASH_WLOCK_ASSERT(pcbinfo);
1345 * Remember addr if jailed, to prevent
1348 if (prison_flag(td->td_ucred, PR_IP4))
1349 inp->inp_laddr = laddr;
1350 inp->inp_lport = lport;
1351 if (in_pcbinshash(inp) != 0) {
1356 inp->inp_flags |= INP_ANONPORT;
1359 faddr = sin->sin_addr;
1360 fport = sin->sin_port;
1363 INP_LOCK_ASSERT(inp);
1364 faddr = inp->inp_faddr;
1365 fport = inp->inp_fport;
1366 if (faddr.s_addr == INADDR_ANY) {
1373 * Calculate data length and get a mbuf for UDP, IP, and possible
1374 * link-layer headers. Immediate slide the data pointer back forward
1375 * since we won't use that space at this layer.
1377 M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_NOWAIT);
1382 m->m_data += max_linkhdr;
1383 m->m_len -= max_linkhdr;
1384 m->m_pkthdr.len -= max_linkhdr;
1387 * Fill in mbuf with extended UDP header and addresses and length put
1388 * into network format.
1390 ui = mtod(m, struct udpiphdr *);
1391 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
1395 ui->ui_sport = lport;
1396 ui->ui_dport = fport;
1397 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1398 if (pr == IPPROTO_UDPLITE) {
1402 up = intoudpcb(inp);
1403 cscov = up->u_txcslen;
1404 plen = (u_short)len + sizeof(struct udphdr);
1407 ui->ui_len = htons(plen);
1408 ui->ui_ulen = htons(cscov);
1410 * For UDP-Lite, checksum coverage length of zero means
1411 * the entire UDPLite packet is covered by the checksum.
1413 cscov_partial = (cscov == 0) ? 0 : 1;
1415 ui->ui_v = IPVERSION << 4;
1418 * Set the Don't Fragment bit in the IP header.
1420 if (inp->inp_flags & INP_DONTFRAG) {
1423 ip = (struct ip *)&ui->ui_i;
1424 ip->ip_off |= htons(IP_DF);
1428 if (inp->inp_socket->so_options & SO_DONTROUTE)
1429 ipflags |= IP_ROUTETOIF;
1430 if (inp->inp_socket->so_options & SO_BROADCAST)
1431 ipflags |= IP_ALLOWBROADCAST;
1432 if (inp->inp_flags & INP_ONESBCAST)
1433 ipflags |= IP_SENDONES;
1436 mac_inpcb_create_mbuf(inp, m);
1440 * Set up checksum and output datagram.
1443 if (pr == IPPROTO_UDPLITE) {
1444 if (inp->inp_flags & INP_ONESBCAST)
1445 faddr.s_addr = INADDR_BROADCAST;
1446 if (cscov_partial) {
1447 if ((ui->ui_sum = in_cksum(m, sizeof(struct ip) + cscov)) == 0)
1448 ui->ui_sum = 0xffff;
1450 if ((ui->ui_sum = in_cksum(m, sizeof(struct udpiphdr) + len)) == 0)
1451 ui->ui_sum = 0xffff;
1453 } else if (V_udp_cksum) {
1454 if (inp->inp_flags & INP_ONESBCAST)
1455 faddr.s_addr = INADDR_BROADCAST;
1456 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
1457 htons((u_short)len + sizeof(struct udphdr) + pr));
1458 m->m_pkthdr.csum_flags = CSUM_UDP;
1459 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1461 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len);
1462 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1463 ((struct ip *)ui)->ip_tos = tos; /* XXX */
1464 UDPSTAT_INC(udps_opackets);
1467 * Setup flowid / RSS information for outbound socket.
1469 * Once the UDP code decides to set a flowid some other way,
1470 * this allows the flowid to be overridden by userland.
1472 if (flowtype != M_HASHTYPE_NONE) {
1473 m->m_pkthdr.flowid = flowid;
1474 M_HASHTYPE_SET(m, flowtype);
1477 uint32_t hash_val, hash_type;
1479 * Calculate an appropriate RSS hash for UDP and
1482 * The called function will take care of figuring out
1483 * whether a 2-tuple or 4-tuple hash is required based
1484 * on the currently configured scheme.
1486 * Later later on connected socket values should be
1487 * cached in the inpcb and reused, rather than constantly
1488 * re-calculating it.
1490 * UDP Lite is a different protocol number and will
1491 * likely end up being hashed as a 2-tuple until
1492 * RSS / NICs grow UDP Lite protocol awareness.
1494 if (rss_proto_software_hash_v4(faddr, laddr, fport, lport,
1495 pr, &hash_val, &hash_type) == 0) {
1496 m->m_pkthdr.flowid = hash_val;
1497 M_HASHTYPE_SET(m, hash_type);
1504 * Don't override with the inp cached flowid value.
1506 * Depending upon the kind of send being done, the inp
1507 * flowid/flowtype values may actually not be appropriate
1508 * for this particular socket send.
1510 * We should either leave the flowid at zero (which is what is
1511 * currently done) or set it to some software generated
1512 * hash value based on the packet contents.
1514 ipflags |= IP_NODEFAULTFLOWID;
1517 if (unlock_udbinfo == UH_WLOCKED)
1518 INP_HASH_WUNLOCK(pcbinfo);
1519 else if (unlock_udbinfo == UH_RLOCKED)
1520 INP_HASH_RUNLOCK(pcbinfo);
1521 UDP_PROBE(send, NULL, inp, &ui->ui_i, inp, &ui->ui_u);
1522 error = ip_output(m, inp->inp_options,
1523 (unlock_inp == UH_WLOCKED ? &inp->inp_route : NULL), ipflags,
1524 inp->inp_moptions, inp);
1525 if (unlock_inp == UH_WLOCKED)
1532 if (unlock_udbinfo == UH_WLOCKED) {
1533 KASSERT(unlock_inp == UH_WLOCKED,
1534 ("%s: excl udbinfo lock, shared inp lock", __func__));
1535 INP_HASH_WUNLOCK(pcbinfo);
1537 } else if (unlock_udbinfo == UH_RLOCKED) {
1538 KASSERT(unlock_inp == UH_RLOCKED,
1539 ("%s: shared udbinfo lock, excl inp lock", __func__));
1540 INP_HASH_RUNLOCK(pcbinfo);
1542 } else if (unlock_inp == UH_WLOCKED)
1551 udp_abort(struct socket *so)
1554 struct inpcbinfo *pcbinfo;
1556 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1557 inp = sotoinpcb(so);
1558 KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
1560 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1561 INP_HASH_WLOCK(pcbinfo);
1562 in_pcbdisconnect(inp);
1563 inp->inp_laddr.s_addr = INADDR_ANY;
1564 INP_HASH_WUNLOCK(pcbinfo);
1565 soisdisconnected(so);
1571 udp_attach(struct socket *so, int proto, struct thread *td)
1574 struct inpcbinfo *pcbinfo;
1577 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1578 inp = sotoinpcb(so);
1579 KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
1580 error = soreserve(so, udp_sendspace, udp_recvspace);
1583 INP_INFO_WLOCK(pcbinfo);
1584 error = in_pcballoc(so, pcbinfo);
1586 INP_INFO_WUNLOCK(pcbinfo);
1590 inp = sotoinpcb(so);
1591 inp->inp_vflag |= INP_IPV4;
1592 inp->inp_ip_ttl = V_ip_defttl;
1594 error = udp_newudpcb(inp);
1598 INP_INFO_WUNLOCK(pcbinfo);
1603 INP_INFO_WUNLOCK(pcbinfo);
1609 udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, udp_tun_icmp_t i, void *ctx)
1614 KASSERT(so->so_type == SOCK_DGRAM,
1615 ("udp_set_kernel_tunneling: !dgram"));
1616 inp = sotoinpcb(so);
1617 KASSERT(inp != NULL, ("udp_set_kernel_tunneling: inp == NULL"));
1619 up = intoudpcb(inp);
1620 if ((up->u_tun_func != NULL) ||
1621 (up->u_icmp_func != NULL)) {
1626 up->u_icmp_func = i;
1627 up->u_tun_ctx = ctx;
1634 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
1637 struct inpcbinfo *pcbinfo;
1640 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1641 inp = sotoinpcb(so);
1642 KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
1644 INP_HASH_WLOCK(pcbinfo);
1645 error = in_pcbbind(inp, nam, td->td_ucred);
1646 INP_HASH_WUNLOCK(pcbinfo);
1652 udp_close(struct socket *so)
1655 struct inpcbinfo *pcbinfo;
1657 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1658 inp = sotoinpcb(so);
1659 KASSERT(inp != NULL, ("udp_close: inp == NULL"));
1661 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1662 INP_HASH_WLOCK(pcbinfo);
1663 in_pcbdisconnect(inp);
1664 inp->inp_laddr.s_addr = INADDR_ANY;
1665 INP_HASH_WUNLOCK(pcbinfo);
1666 soisdisconnected(so);
1672 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1675 struct inpcbinfo *pcbinfo;
1676 struct sockaddr_in *sin;
1679 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1680 inp = sotoinpcb(so);
1681 KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
1683 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1687 sin = (struct sockaddr_in *)nam;
1688 error = prison_remote_ip4(td->td_ucred, &sin->sin_addr);
1693 INP_HASH_WLOCK(pcbinfo);
1694 error = in_pcbconnect(inp, nam, td->td_ucred);
1695 INP_HASH_WUNLOCK(pcbinfo);
1703 udp_detach(struct socket *so)
1706 struct inpcbinfo *pcbinfo;
1709 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1710 inp = sotoinpcb(so);
1711 KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
1712 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
1713 ("udp_detach: not disconnected"));
1714 INP_INFO_WLOCK(pcbinfo);
1716 up = intoudpcb(inp);
1717 KASSERT(up != NULL, ("%s: up == NULL", __func__));
1718 inp->inp_ppcb = NULL;
1721 INP_INFO_WUNLOCK(pcbinfo);
1726 udp_disconnect(struct socket *so)
1729 struct inpcbinfo *pcbinfo;
1731 pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
1732 inp = sotoinpcb(so);
1733 KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
1735 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1739 INP_HASH_WLOCK(pcbinfo);
1740 in_pcbdisconnect(inp);
1741 inp->inp_laddr.s_addr = INADDR_ANY;
1742 INP_HASH_WUNLOCK(pcbinfo);
1744 so->so_state &= ~SS_ISCONNECTED; /* XXX */
1751 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
1752 struct mbuf *control, struct thread *td)
1756 inp = sotoinpcb(so);
1757 KASSERT(inp != NULL, ("udp_send: inp == NULL"));
1758 return (udp_output(inp, m, addr, control, td));
1763 udp_shutdown(struct socket *so)
1767 inp = sotoinpcb(so);
1768 KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
1776 struct pr_usrreqs udp_usrreqs = {
1777 .pru_abort = udp_abort,
1778 .pru_attach = udp_attach,
1779 .pru_bind = udp_bind,
1780 .pru_connect = udp_connect,
1781 .pru_control = in_control,
1782 .pru_detach = udp_detach,
1783 .pru_disconnect = udp_disconnect,
1784 .pru_peeraddr = in_getpeeraddr,
1785 .pru_send = udp_send,
1786 .pru_soreceive = soreceive_dgram,
1787 .pru_sosend = sosend_dgram,
1788 .pru_shutdown = udp_shutdown,
1789 .pru_sockaddr = in_getsockaddr,
1790 .pru_sosetlabel = in_pcbsosetlabel,
1791 .pru_close = udp_close,