2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved.
3 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The DragonFly Project nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific, prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
63 * $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.64.2.18 2003/01/24 05:11:34 sam Exp $
66 #include "opt_ipsec.h"
67 #include "opt_inet6.h"
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/kernel.h>
72 #include <sys/malloc.h>
74 #include <sys/domain.h>
77 #include <sys/protosw.h>
78 #include <sys/socket.h>
79 #include <sys/socketvar.h>
80 #include <sys/sysctl.h>
81 #include <sys/syslog.h>
82 #include <sys/in_cksum.h>
85 #include <sys/thread2.h>
86 #include <sys/socketvar2.h>
87 #include <sys/serialize.h>
89 #include <machine/stdarg.h>
92 #include <net/route.h>
93 #include <net/netmsg2.h>
94 #include <net/netisr2.h>
96 #include <netinet/in.h>
97 #include <netinet/in_systm.h>
98 #include <netinet/ip.h>
100 #include <netinet/ip6.h>
102 #include <netinet/in_pcb.h>
103 #include <netinet/in_var.h>
104 #include <netinet/ip_var.h>
106 #include <netinet6/ip6_var.h>
108 #include <netinet/ip_icmp.h>
109 #include <netinet/icmp_var.h>
110 #include <netinet/udp.h>
111 #include <netinet/udp_var.h>
114 #include <netproto/ipsec/ipsec.h>
118 #include <netinet6/ipsec.h>
121 #define MSGF_UDP_SEND MSGF_PROTO1
123 #define INP_DIRECT_DETACH INP_FLAG_PROTO2
125 #define UDP_KTR_STRING "inp=%p"
126 #define UDP_KTR_ARGS struct inpcb *inp
129 #define KTR_UDP KTR_ALL
132 KTR_INFO_MASTER(udp);
133 KTR_INFO(KTR_UDP, udp, send_beg, 0, UDP_KTR_STRING, UDP_KTR_ARGS);
134 KTR_INFO(KTR_UDP, udp, send_end, 1, UDP_KTR_STRING, UDP_KTR_ARGS);
135 KTR_INFO(KTR_UDP, udp, send_ipout, 2, UDP_KTR_STRING, UDP_KTR_ARGS);
136 KTR_INFO(KTR_UDP, udp, redisp_ipout_beg, 3, UDP_KTR_STRING, UDP_KTR_ARGS);
137 KTR_INFO(KTR_UDP, udp, redisp_ipout_end, 4, UDP_KTR_STRING, UDP_KTR_ARGS);
138 KTR_INFO(KTR_UDP, udp, send_redisp, 5, UDP_KTR_STRING, UDP_KTR_ARGS);
139 KTR_INFO(KTR_UDP, udp, send_inswildcard, 6, UDP_KTR_STRING, UDP_KTR_ARGS);
141 #define logudp(name, inp) KTR_LOG(udp_##name, inp)
144 * UDP protocol implementation.
145 * Per RFC 768, August, 1980.
148 static int udpcksum = 1;
150 static int udpcksum = 0; /* XXX */
152 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
153 &udpcksum, 0, "Enable checksumming of UDP packets");
156 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
157 &log_in_vain, 0, "Log all incoming UDP packets");
159 static int blackhole = 0;
160 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
161 &blackhole, 0, "Do not send port unreachables for refused connects");
163 static int strict_mcast_mship = 1;
164 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW,
165 &strict_mcast_mship, 0, "Only send multicast to member sockets");
167 int udp_sosend_async = 1;
168 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_async, CTLFLAG_RW,
169 &udp_sosend_async, 0, "UDP asynchronized pru_send");
171 int udp_sosend_prepend = 1;
172 SYSCTL_INT(_net_inet_udp, OID_AUTO, sosend_prepend, CTLFLAG_RW,
173 &udp_sosend_prepend, 0,
174 "Prepend enough space for proto and link header in pru_send");
176 static int udp_reuseport_ext = 1;
177 SYSCTL_INT(_net_inet_udp, OID_AUTO, reuseport_ext, CTLFLAG_RW,
178 &udp_reuseport_ext, 0, "SO_REUSEPORT extension");
180 struct inpcbinfo udbinfo[MAXCPU];
183 #define UDBHASHSIZE 16
186 struct udpstat udpstat_percpu[MAXCPU] __cachealign;
188 static void udp_append(struct inpcb *last, struct ip *ip,
189 struct mbuf *n, int off, struct sockaddr_in *udp_in);
191 static int udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin,
192 struct sockaddr_in *if_sin);
194 static boolean_t udp_inswildcardhash(struct inpcb *inp,
195 struct netmsg_base *msg, int error);
196 static void udp_remwildcardhash(struct inpcb *inp);
201 struct inpcbportinfo *portinfo;
204 portinfo = kmalloc_cachealign(sizeof(*portinfo) * ncpus2, M_PCB,
207 for (cpu = 0; cpu < ncpus2; cpu++) {
208 struct inpcbinfo *uicb = &udbinfo[cpu];
212 * UDP pcb list, wildcard hash table and localgroup hash
215 in_pcbinfo_init(uicb, cpu, TRUE);
216 uicb->hashbase = hashinit(UDBHASHSIZE, M_PCB, &uicb->hashmask);
218 in_pcbportinfo_init(&portinfo[cpu], UDBHASHSIZE, TRUE, cpu);
219 uicb->portinfo = portinfo;
220 uicb->portinfo_mask = ncpus2_mask;
222 uicb->wildcardhashbase = hashinit(UDBHASHSIZE, M_PCB,
223 &uicb->wildcardhashmask);
224 uicb->localgrphashbase = hashinit(UDBHASHSIZE, M_PCB,
225 &uicb->localgrphashmask);
227 uicb->ipi_size = sizeof(struct inpcb);
231 * Initialize UDP statistics counters for each CPU.
233 for (cpu = 0; cpu < ncpus; ++cpu)
234 bzero(&udpstat_percpu[cpu], sizeof(struct udpstat));
238 sysctl_udpstat(SYSCTL_HANDLER_ARGS)
242 for (cpu = 0; cpu < ncpus; ++cpu) {
243 if ((error = SYSCTL_OUT(req, &udpstat_percpu[cpu],
244 sizeof(struct udpstat))))
246 if ((error = SYSCTL_IN(req, &udpstat_percpu[cpu],
247 sizeof(struct udpstat))))
253 SYSCTL_PROC(_net_inet_udp, UDPCTL_STATS, stats, (CTLTYPE_OPAQUE | CTLFLAG_RW),
254 0, 0, sysctl_udpstat, "S,udpstat", "UDP statistics");
257 udp_ctloutput(netmsg_t msg)
259 struct socket *so = msg->base.nm_so;
260 struct sockopt *sopt = msg->ctloutput.nm_sopt;
261 struct inpcb *inp = so->so_pcb;
263 if (sopt->sopt_level == IPPROTO_IP) {
264 switch (sopt->sopt_name) {
265 case IP_MULTICAST_IF:
266 case IP_MULTICAST_VIF:
267 case IP_MULTICAST_TTL:
268 case IP_MULTICAST_LOOP:
269 case IP_ADD_MEMBERSHIP:
270 case IP_DROP_MEMBERSHIP:
271 if (&curthread->td_msgport != netisr_cpuport(0)) {
273 * This pr_ctloutput msg will be forwarded
274 * to netisr0 to run; we can't do direct
277 inp->inp_flags &= ~INP_DIRECT_DETACH;
282 return ip_ctloutput(msg);
286 * Check multicast packets to make sure they are only sent to sockets with
287 * multicast memberships for the packet's destination address and arrival
288 * interface. Multicast packets to multicast-unaware sockets are also
291 * Returns 0 if the packet is acceptable, -1 if it is not.
294 check_multicast_membership(const struct ip *ip, const struct inpcb *inp,
295 const struct mbuf *m)
297 const struct ip_moptions *mopt;
300 if (strict_mcast_mship == 0 ||
301 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
305 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
306 ("multicast input not in netisr0"));
308 mopt = inp->inp_moptions;
311 for (mshipno = 0; mshipno < mopt->imo_num_memberships; ++mshipno) {
312 const struct in_multi *maddr = mopt->imo_membership[mshipno];
314 if (ip->ip_dst.s_addr == maddr->inm_addr.s_addr &&
315 m->m_pkthdr.rcvif == maddr->inm_ifp) {
322 struct udp_mcast_arg {
328 struct sockaddr_in *udp_in;
332 udp_mcast_input(struct udp_mcast_arg *arg)
334 struct inpcb *inp = arg->inp;
335 struct inpcb *last = arg->last;
336 struct ip *ip = arg->ip;
337 struct mbuf *m = arg->m;
339 if (check_multicast_membership(ip, inp, m) < 0)
340 return ERESTART; /* caller continue */
346 /* check AH/ESP integrity. */
347 if (ipsec4_in_reject_so(m, last->inp_socket))
348 ipsecstat.in_polvio++;
349 /* do not inject data to pcb */
353 /* check AH/ESP integrity. */
354 if (ipsec4_in_reject(m, last))
357 #endif /*FAST_IPSEC*/
358 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL)
359 udp_append(last, ip, n,
360 arg->iphlen + sizeof(struct udphdr),
363 arg->last = last = inp;
366 * Don't look for additional matches if this one does
367 * not have either the SO_REUSEPORT or SO_REUSEADDR
368 * socket options set. This heuristic avoids searching
369 * through all pcbs in the common case of a non-shared
370 * port. It * assumes that an application will never
371 * clear these options after setting them.
373 if (!(last->inp_socket->so_options &
374 (SO_REUSEPORT | SO_REUSEADDR)))
375 return EJUSTRETURN; /* caller stop */
380 udp_input(struct mbuf **mp, int *offp, int proto)
382 struct sockaddr_in udp_in = { sizeof udp_in, AF_INET };
388 struct mbuf *opts = NULL;
391 struct inpcbinfo *pcbinfo = &udbinfo[mycpuid];
398 udp_stat.udps_ipackets++;
401 * Strip IP options, if any; should skip this,
402 * make available to user, and use on returned packets,
403 * but we don't yet have a way to check the checksum
404 * with options still present.
406 if (iphlen > sizeof(struct ip)) {
408 iphlen = sizeof(struct ip);
412 * IP and UDP headers are together in first mbuf.
413 * Already checked and pulled up in ip_demux().
415 KASSERT(m->m_len >= iphlen + sizeof(struct udphdr),
416 ("UDP header not in one mbuf"));
418 ip = mtod(m, struct ip *);
419 uh = (struct udphdr *)((caddr_t)ip + iphlen);
421 /* destination port of 0 is illegal, based on RFC768. */
422 if (uh->uh_dport == 0)
426 * Make mbuf data length reflect UDP length.
427 * If not enough data to reflect UDP length, drop.
429 len = ntohs((u_short)uh->uh_ulen);
430 if (ip->ip_len != len) {
431 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
432 udp_stat.udps_badlen++;
435 m_adj(m, len - ip->ip_len);
436 /* ip->ip_len = len; */
439 * Save a copy of the IP header in case we want restore it
440 * for sending an ICMP error message in response.
445 * Checksum extended UDP header and data.
448 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
449 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
450 uh->uh_sum = m->m_pkthdr.csum_data;
452 uh->uh_sum = in_pseudo(ip->ip_src.s_addr,
453 ip->ip_dst.s_addr, htonl((u_short)len +
454 m->m_pkthdr.csum_data + IPPROTO_UDP));
455 uh->uh_sum ^= 0xffff;
459 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
460 bzero(((struct ipovly *)ip)->ih_x1, 9);
461 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
462 uh->uh_sum = in_cksum(m, len + sizeof(struct ip));
463 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
466 udp_stat.udps_badsum++;
468 return(IPPROTO_DONE);
471 udp_stat.udps_nosum++;
473 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
474 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
475 struct inpcbhead *connhead;
476 struct inpcontainer *ic, *ic_marker;
477 struct inpcontainerhead *ichead;
478 struct udp_mcast_arg arg;
483 * Deliver a multicast or broadcast datagram to *all* sockets
484 * for which the local and remote addresses and ports match
485 * those of the incoming datagram. This allows more than
486 * one process to receive multi/broadcasts on the same port.
487 * (This really ought to be done for unicast datagrams as
488 * well, but that would cause problems with existing
489 * applications that open both address-specific sockets and
490 * a wildcard socket listening to the same port -- they would
491 * end up receiving duplicates of every unicast datagram.
492 * Those applications open the multiple sockets to overcome an
493 * inadequacy of the UDP socket interface, but for backwards
494 * compatibility we avoid the problem here rather than
495 * fixing the interface. Maybe 4.5BSD will remedy this?)
499 * Construct sockaddr format source address.
501 udp_in.sin_port = uh->uh_sport;
502 udp_in.sin_addr = ip->ip_src;
503 arg.udp_in = &udp_in;
505 * Locate pcb(s) for datagram.
506 * (Algorithm copied from raw_intr().)
511 connhead = &pcbinfo->hashbase[
512 INP_PCBCONNHASH(ip->ip_src.s_addr, uh->uh_sport,
513 ip->ip_dst.s_addr, uh->uh_dport, pcbinfo->hashmask)];
514 LIST_FOREACH(inp, connhead, inp_hash) {
516 if (!INP_ISIPV4(inp))
519 if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
520 !in_hosteq(inp->inp_laddr, ip->ip_dst) ||
521 inp->inp_fport != uh->uh_sport ||
522 inp->inp_lport != uh->uh_dport)
530 error = udp_mcast_input(&arg);
531 if (error == ERESTART)
535 if (error == EJUSTRETURN)
539 ichead = &pcbinfo->wildcardhashbase[
540 INP_PCBWILDCARDHASH(uh->uh_dport,
541 pcbinfo->wildcardhashmask)];
542 ic_marker = in_pcbcontainer_marker(mycpuid);
544 GET_PCBINFO_TOKEN(pcbinfo);
545 LIST_INSERT_HEAD(ichead, ic_marker, ic_list);
546 while ((ic = LIST_NEXT(ic_marker, ic_list)) != NULL) {
547 LIST_REMOVE(ic_marker, ic_list);
548 LIST_INSERT_AFTER(ic, ic_marker, ic_list);
551 if (inp->inp_flags & INP_PLACEMARKER)
554 if (!INP_ISIPV4(inp))
557 if (inp->inp_lport != uh->uh_dport)
559 if (inp->inp_laddr.s_addr != INADDR_ANY &&
560 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
568 error = udp_mcast_input(&arg);
569 if (error == ERESTART)
573 if (error == EJUSTRETURN)
576 LIST_REMOVE(ic_marker, ic_list);
577 REL_PCBINFO_TOKEN(pcbinfo);
581 * No matching pcb found; discard datagram.
582 * (No need to send an ICMP Port Unreachable
583 * for a broadcast or multicast datgram.)
585 udp_stat.udps_noportbcast++;
589 /* check AH/ESP integrity. */
590 if (ipsec4_in_reject_so(m, last->inp_socket)) {
591 ipsecstat.in_polvio++;
596 /* check AH/ESP integrity. */
597 if (ipsec4_in_reject(m, last))
599 #endif /*FAST_IPSEC*/
600 udp_append(last, ip, m, iphlen + sizeof(struct udphdr),
602 return(IPPROTO_DONE);
605 * Locate pcb for datagram.
607 inp = in_pcblookup_pkthash(pcbinfo, ip->ip_src, uh->uh_sport,
608 ip->ip_dst, uh->uh_dport, TRUE, m->m_pkthdr.rcvif,
609 udp_reuseport_ext ? m : NULL);
612 char buf[sizeof "aaa.bbb.ccc.ddd"];
614 strcpy(buf, inet_ntoa(ip->ip_dst));
616 "Connection attempt to UDP %s:%d from %s:%d\n",
617 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
618 ntohs(uh->uh_sport));
620 udp_stat.udps_noport++;
621 if (m->m_flags & (M_BCAST | M_MCAST)) {
622 udp_stat.udps_noportbcast++;
628 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
632 ip->ip_len += iphlen;
633 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
634 return(IPPROTO_DONE);
636 KASSERT(INP_ISIPV4(inp), ("not inet inpcb"));
638 if (ipsec4_in_reject_so(m, inp->inp_socket)) {
639 ipsecstat.in_polvio++;
644 if (ipsec4_in_reject(m, inp))
646 #endif /*FAST_IPSEC*/
648 * Check the minimum TTL for socket.
650 if (ip->ip_ttl < inp->inp_ip_minttl)
654 * Construct sockaddr format source address.
655 * Stuff source address and datagram in user buffer.
657 udp_in.sin_port = uh->uh_sport;
658 udp_in.sin_addr = ip->ip_src;
659 if ((inp->inp_flags & INP_CONTROLOPTS) ||
660 (inp->inp_socket->so_options & SO_TIMESTAMP))
661 ip_savecontrol(inp, &opts, ip, m);
662 m_adj(m, iphlen + sizeof(struct udphdr));
664 lwkt_gettoken(&inp->inp_socket->so_rcv.ssb_token);
665 if (ssb_appendaddr(&inp->inp_socket->so_rcv,
666 (struct sockaddr *)&udp_in, m, opts) == 0) {
667 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
668 udp_stat.udps_fullsock++;
671 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
672 sorwakeup(inp->inp_socket);
673 return(IPPROTO_DONE);
678 return(IPPROTO_DONE);
682 * subroutine of udp_input(), mainly for source code readability.
683 * caller must properly init udp_ip6 and udp_in6 beforehand.
686 udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n, int off,
687 struct sockaddr_in *udp_in)
689 struct mbuf *opts = NULL;
692 KASSERT(INP_ISIPV4(last), ("not inet inpcb"));
694 if (last->inp_flags & INP_CONTROLOPTS ||
695 last->inp_socket->so_options & SO_TIMESTAMP)
696 ip_savecontrol(last, &opts, ip, n);
699 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
700 ret = ssb_appendaddr(&last->inp_socket->so_rcv,
701 (struct sockaddr *)udp_in, n, opts);
702 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
707 udp_stat.udps_fullsock++;
709 sorwakeup(last->inp_socket);
714 * Notify a udp user of an asynchronous error;
715 * just wake up so that he can collect error status.
718 udp_notify(struct inpcb *inp, int error)
720 inp->inp_socket->so_error = error;
721 sorwakeup(inp->inp_socket);
722 sowwakeup(inp->inp_socket);
725 struct netmsg_udp_notify {
726 struct netmsg_base base;
727 inp_notify_t nm_notify;
728 struct in_addr nm_faddr;
733 udp_notifyall_oncpu(netmsg_t msg)
735 struct netmsg_udp_notify *nm = (struct netmsg_udp_notify *)msg;
736 int nextcpu, cpu = mycpuid;
738 in_pcbnotifyall(&udbinfo[cpu], nm->nm_faddr, nm->nm_arg, nm->nm_notify);
741 if (nextcpu < ncpus2)
742 lwkt_forwardmsg(netisr_cpuport(nextcpu), &nm->base.lmsg);
744 lwkt_replymsg(&nm->base.lmsg, 0);
748 udp_get_inpnotify(int cmd, const struct sockaddr *sa,
749 struct ip **ip0, int *cpuid)
751 struct in_addr faddr;
752 struct ip *ip = *ip0;
753 inp_notify_t notify = udp_notify;
755 faddr = ((const struct sockaddr_in *)sa)->sin_addr;
756 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
759 if (PRC_IS_REDIRECT(cmd)) {
761 notify = in_rtchange;
762 } else if (cmd == PRC_HOSTDEAD) {
764 } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) {
770 /* Go through all CPUs */
773 const struct udphdr *uh;
775 uh = (const struct udphdr *)
776 ((caddr_t)ip + (ip->ip_hl << 2));
777 *cpuid = udp_addrcpu(faddr.s_addr, uh->uh_dport,
778 ip->ip_src.s_addr, uh->uh_sport);
787 udp_ctlinput(netmsg_t msg)
789 struct sockaddr *sa = msg->ctlinput.nm_arg;
790 struct ip *ip = msg->ctlinput.nm_extra;
791 int cmd = msg->ctlinput.nm_cmd, cpuid;
793 struct in_addr faddr;
795 notify = udp_get_inpnotify(cmd, sa, &ip, &cpuid);
799 faddr = ((struct sockaddr_in *)sa)->sin_addr;
801 const struct udphdr *uh;
804 if (cpuid != mycpuid)
807 uh = (const struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
808 inp = in_pcblookup_hash(&udbinfo[mycpuid], faddr, uh->uh_dport,
809 ip->ip_src, uh->uh_sport, 0, NULL);
810 if (inp != NULL && inp->inp_socket != NULL)
811 notify(inp, inetctlerrmap[cmd]);
812 } else if (msg->ctlinput.nm_direct) {
813 if (cpuid != ncpus && cpuid != mycpuid)
815 if (mycpuid >= ncpus2)
818 in_pcbnotifyall(&udbinfo[mycpuid], faddr, inetctlerrmap[cmd],
821 struct netmsg_udp_notify *nm;
823 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
824 nm = kmalloc(sizeof(*nm), M_LWKTMSG, M_INTWAIT);
825 netmsg_init(&nm->base, NULL, &netisr_afree_rport,
826 0, udp_notifyall_oncpu);
827 nm->nm_faddr = faddr;
828 nm->nm_arg = inetctlerrmap[cmd];
829 nm->nm_notify = notify;
830 lwkt_sendmsg(netisr_cpuport(0), &nm->base.lmsg);
833 lwkt_replymsg(&msg->lmsg, 0);
836 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, udbinfo, 0,
837 in_pcblist_global_ncpus2, "S,xinpcb", "List of active UDP sockets");
840 udp_getcred(SYSCTL_HANDLER_ARGS)
842 struct sockaddr_in addrs[2];
843 struct ucred cred0, *cred = NULL;
845 int error, cpu, origcpu;
847 error = priv_check(req->td, PRIV_ROOT);
850 error = SYSCTL_IN(req, addrs, sizeof addrs);
855 cpu = udp_addrcpu(addrs[1].sin_addr.s_addr, addrs[1].sin_port,
856 addrs[0].sin_addr.s_addr, addrs[0].sin_port);
858 lwkt_migratecpu(cpu);
860 inp = in_pcblookup_hash(&udbinfo[cpu],
861 addrs[1].sin_addr, addrs[1].sin_port,
862 addrs[0].sin_addr, addrs[0].sin_port, TRUE, NULL);
863 if (inp == NULL || inp->inp_socket == NULL) {
865 } else if (inp->inp_socket->so_cred != NULL) {
866 cred0 = *(inp->inp_socket->so_cred);
870 lwkt_migratecpu(origcpu);
875 return SYSCTL_OUT(req, cred, sizeof(struct ucred));
877 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
878 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
881 udp_send_redispatch(netmsg_t msg)
883 struct mbuf *m = msg->send.nm_m;
884 int pru_flags = msg->send.nm_flags;
885 struct inpcb *inp = msg->send.base.nm_so->so_pcb;
886 struct mbuf *m_opt = msg->send.nm_control; /* XXX save ipopt */
887 int flags = msg->send.nm_priv; /* ip_output flags */
890 logudp(redisp_ipout_beg, inp);
893 * - Don't use inp route cache. It should only be used in the
895 * - Access to inp_moptions should be safe, since multicast UDP
896 * datagrams are redispatched to netisr0 and inp_moptions is
897 * changed only in netisr0.
899 error = ip_output(m, m_opt, NULL, flags, inp->inp_moptions, inp);
900 if ((pru_flags & PRUS_NOREPLY) == 0)
901 lwkt_replymsg(&msg->send.base.lmsg, error);
904 /* Free saved ip options, if any */
908 logudp(redisp_ipout_end, inp);
912 udp_send(netmsg_t msg)
914 struct socket *so = msg->send.base.nm_so;
915 struct mbuf *m = msg->send.nm_m;
916 struct sockaddr *dstaddr = msg->send.nm_addr;
917 int pru_flags = msg->send.nm_flags;
918 struct inpcb *inp = so->so_pcb;
919 struct thread *td = msg->send.nm_td;
923 int len = m->m_pkthdr.len;
924 struct sockaddr_in *sin; /* really is initialized before use */
927 KKASSERT(msg->send.nm_control == NULL);
929 logudp(send_beg, inp);
936 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
941 if (inp->inp_lport == 0) { /* unbound socket */
944 error = in_pcbbind(inp, NULL, td);
949 * Need to call udp_send again, after this inpcb is
950 * inserted into wildcard hash table.
952 msg->send.base.lmsg.ms_flags |= MSGF_UDP_SEND;
953 forwarded = udp_inswildcardhash(inp, &msg->send.base, 0);
956 * The message is further forwarded, so we are
959 logudp(send_inswildcard, inp);
964 if (dstaddr != NULL) { /* destination address specified */
965 if (inp->inp_faddr.s_addr != INADDR_ANY) {
966 /* already connected */
970 sin = (struct sockaddr_in *)dstaddr;
971 if (!prison_remote_ip(td, (struct sockaddr *)&sin)) {
972 error = EAFNOSUPPORT; /* IPv6 only jail */
976 if (inp->inp_faddr.s_addr == INADDR_ANY) {
977 /* no destination specified and not already connected */
985 * Calculate data length and get a mbuf
986 * for UDP and IP headers.
988 M_PREPEND(m, sizeof(struct udpiphdr), MB_DONTWAIT);
995 * Fill in mbuf with extended UDP header
996 * and addresses and length put into network format.
998 ui = mtod(m, struct udpiphdr *);
999 bzero(ui->ui_x1, sizeof ui->ui_x1); /* XXX still needed? */
1000 ui->ui_pr = IPPROTO_UDP;
1003 * Set destination address.
1005 if (dstaddr != NULL) { /* use specified destination */
1006 ui->ui_dst = sin->sin_addr;
1007 ui->ui_dport = sin->sin_port;
1008 } else { /* use connected destination */
1009 ui->ui_dst = inp->inp_faddr;
1010 ui->ui_dport = inp->inp_fport;
1014 * Set source address.
1016 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1017 IN_MULTICAST(ntohl(inp->inp_laddr.s_addr))) {
1018 struct sockaddr_in *if_sin;
1020 if (dstaddr == NULL) {
1022 * connect() had (or should have) failed because
1023 * the interface had no IP address, but the
1024 * application proceeded to call send() anyways.
1030 /* Look up outgoing interface. */
1031 error = in_pcbladdr_find(inp, dstaddr, &if_sin, td, 1);
1034 ui->ui_src = if_sin->sin_addr; /* use address of interface */
1036 ui->ui_src = inp->inp_laddr; /* use non-null bound address */
1038 ui->ui_sport = inp->inp_lport;
1039 KASSERT(inp->inp_lport != 0, ("inp lport should have been bound"));
1042 * Release the original thread, since it is no longer used
1044 if (pru_flags & PRUS_HELDTD) {
1046 pru_flags &= ~PRUS_HELDTD;
1049 * Free the dest address, since it is no longer needed
1051 if (pru_flags & PRUS_FREEADDR) {
1052 kfree(dstaddr, M_SONAME);
1053 pru_flags &= ~PRUS_FREEADDR;
1056 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1059 * Set up checksum and output datagram.
1062 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
1063 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
1064 m->m_pkthdr.csum_flags = CSUM_UDP;
1065 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1066 m->m_pkthdr.csum_thlen = sizeof(struct udphdr);
1070 ((struct ip *)ui)->ip_len = sizeof(struct udpiphdr) + len;
1071 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1072 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
1073 udp_stat.udps_opackets++;
1075 flags = IP_DEBUGROUTE |
1076 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST));
1077 if (pru_flags & PRUS_DONTROUTE)
1078 flags |= SO_DONTROUTE;
1080 if (inp->inp_flags & INP_CONNECTED) {
1082 * For connected socket, this datagram has already
1083 * been in the correct netisr; no need to rehash.
1088 cpu = udp_addrcpu(ui->ui_dst.s_addr, ui->ui_dport,
1089 ui->ui_src.s_addr, ui->ui_sport);
1090 if (cpu != mycpuid) {
1091 struct mbuf *m_opt = NULL;
1092 struct netmsg_pru_send *smsg;
1093 struct lwkt_port *port = netisr_cpuport(cpu);
1096 * Not on the CPU that matches this UDP datagram hash;
1097 * redispatch to the correct CPU to do the ip_output().
1099 if (inp->inp_options != NULL) {
1101 * If there are ip options, then save a copy,
1102 * since accessing inp_options on other CPUs'
1105 * XXX optimize this?
1107 m_opt = m_copym(inp->inp_options, 0, M_COPYALL,
1110 if ((pru_flags & PRUS_NOREPLY) == 0) {
1112 * Change some parts of the original netmsg and
1113 * forward it to the target netisr.
1115 * NOTE: so_port MUST NOT be checked in the target
1119 smsg->nm_priv = flags; /* ip_output flags */
1121 smsg->nm_control = m_opt; /* XXX save ipopt */
1122 smsg->base.lmsg.ms_flags |= MSGF_IGNSOPORT;
1123 smsg->base.nm_dispatch = udp_send_redispatch;
1124 lwkt_forwardmsg(port, &smsg->base.lmsg);
1127 * Recreate the netmsg, since the original mbuf
1128 * could have been changed. And send it to the
1131 * NOTE: so_port MUST NOT be checked in the target
1134 smsg = &m->m_hdr.mh_sndmsg;
1135 netmsg_init(&smsg->base, so, &netisr_apanic_rport,
1136 MSGF_IGNSOPORT, udp_send_redispatch);
1137 smsg->nm_priv = flags; /* ip_output flags */
1138 smsg->nm_flags = pru_flags;
1140 smsg->nm_control = m_opt; /* XXX save ipopt */
1141 lwkt_sendmsg(port, &smsg->base.lmsg);
1144 /* This UDP datagram is redispatched; done */
1145 logudp(send_redisp, inp);
1150 logudp(send_ipout, inp);
1151 error = ip_output(m, inp->inp_options, &inp->inp_route, flags,
1152 inp->inp_moptions, inp);
1159 if (pru_flags & PRUS_HELDTD)
1161 if (pru_flags & PRUS_FREEADDR)
1162 kfree(dstaddr, M_SONAME);
1163 if ((pru_flags & PRUS_NOREPLY) == 0)
1164 lwkt_replymsg(&msg->send.base.lmsg, error);
1166 logudp(send_end, inp);
1169 u_long udp_sendspace = 9216; /* really max datagram size */
1170 /* 40 1K datagrams */
1171 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
1172 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
1174 u_long udp_recvspace = 40 * (1024 +
1176 sizeof(struct sockaddr_in6)
1178 sizeof(struct sockaddr_in)
1181 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
1182 &udp_recvspace, 0, "Maximum incoming UDP datagram size");
1185 * This should never happen, since UDP socket does not support
1186 * connection acception (SO_ACCEPTCONN, i.e. listen(2)).
1189 udp_abort(netmsg_t msg __unused)
1191 panic("udp_abort is called");
1195 udp_attach(netmsg_t msg)
1197 struct socket *so = msg->attach.base.nm_so;
1198 struct pru_attach_info *ai = msg->attach.nm_ai;
1207 error = soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit);
1211 error = in_pcballoc(so, &udbinfo[mycpuid]);
1215 inp = (struct inpcb *)so->so_pcb;
1216 inp->inp_flags |= INP_DIRECT_DETACH;
1217 inp->inp_ip_ttl = ip_defttl;
1220 lwkt_replymsg(&msg->attach.base.lmsg, error);
1224 udp_inswildcard_replymsg(netmsg_t msg)
1226 lwkt_msg_t lmsg = &msg->lmsg;
1228 if (lmsg->ms_flags & MSGF_UDP_SEND) {
1230 /* msg is replied by udp_send() */
1232 lwkt_replymsg(lmsg, lmsg->ms_error);
1237 udp_soreuseport_dispatch(netmsg_t msg)
1239 /* This inpcb has already been in the wildcard hash. */
1240 in_pcblink_flags(msg->base.nm_so->so_pcb, &udbinfo[mycpuid], 0);
1241 udp_inswildcard_replymsg(msg);
1245 udp_sosetport(struct lwkt_msg *msg, lwkt_port_t port)
1247 sosetport(((struct netmsg_base *)msg)->nm_so, port);
1251 udp_inswildcardhash_oncpu(struct inpcb *inp, struct netmsg_base *msg)
1255 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid],
1256 ("not on owner cpu"));
1258 in_pcbinswildcardhash(inp);
1259 for (cpu = 0; cpu < ncpus2; ++cpu) {
1260 if (cpu == mycpuid) {
1262 * This inpcb has been inserted by the above
1263 * in_pcbinswildcardhash().
1267 in_pcbinswildcardhash_oncpu(inp, &udbinfo[cpu]);
1270 if (inp->inp_socket->so_options & SO_REUSEPORT) {
1272 * For SO_REUSEPORT socket, redistribute it based on its
1273 * local group index.
1275 cpu = inp->inp_lgrpindex & ncpus2_mask;
1276 if (cpu != mycpuid) {
1277 struct lwkt_port *port = netisr_cpuport(cpu);
1278 lwkt_msg_t lmsg = &msg->lmsg;
1281 * We are moving the protocol processing port the
1282 * socket is on, we have to unlink here and re-link
1283 * on the target cpu (this inpcb is still left in
1284 * the wildcard hash).
1286 in_pcbunlink_flags(inp, &udbinfo[mycpuid], 0);
1287 msg->nm_dispatch = udp_soreuseport_dispatch;
1290 * See the related comment in tcp_usrreq.c
1293 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1294 lwkt_forwardmsg(port, lmsg);
1295 return TRUE; /* forwarded */
1302 udp_inswildcardhash_dispatch(netmsg_t msg)
1304 struct inpcb *inp = msg->base.nm_so->so_pcb;
1305 boolean_t forwarded;
1307 KASSERT(inp->inp_lport != 0, ("local port not set yet"));
1308 KASSERT((ntohs(inp->inp_lport) & ncpus2_mask) == mycpuid,
1309 ("not target cpu"));
1311 in_pcblink(inp, &udbinfo[mycpuid]);
1313 forwarded = udp_inswildcardhash_oncpu(inp, &msg->base);
1315 /* The message is further forwarded, so we are done here. */
1318 udp_inswildcard_replymsg(msg);
1322 udp_inswildcardhash(struct inpcb *inp, struct netmsg_base *msg, int error)
1324 lwkt_msg_t lmsg = &msg->lmsg;
1327 ASSERT_INP_NOTINHASH(inp);
1329 /* This inpcb could no longer be directly detached */
1330 inp->inp_flags &= ~INP_DIRECT_DETACH;
1333 * Always clear the route cache, so we don't need to
1334 * worry about any owner CPU changes later.
1336 in_pcbresetroute(inp);
1338 KASSERT(inp->inp_lport != 0, ("local port not set yet"));
1339 cpu = ntohs(inp->inp_lport) & ncpus2_mask;
1341 lmsg->ms_error = error;
1342 if (cpu != mycpuid) {
1343 struct lwkt_port *port = netisr_cpuport(cpu);
1346 * We are moving the protocol processing port the socket
1347 * is on, we have to unlink here and re-link on the
1350 in_pcbunlink(inp, &udbinfo[mycpuid]);
1351 msg->nm_dispatch = udp_inswildcardhash_dispatch;
1353 /* See the related comment in tcp_usrreq.c tcp_connect() */
1354 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1355 lwkt_forwardmsg(port, lmsg);
1356 return TRUE; /* forwarded */
1359 return udp_inswildcardhash_oncpu(inp, msg);
1363 udp_bind(netmsg_t msg)
1365 struct socket *so = msg->bind.base.nm_so;
1371 struct sockaddr *nam = msg->bind.nm_nam;
1372 struct thread *td = msg->bind.nm_td;
1374 error = in_pcbbind(inp, nam, td);
1376 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1377 boolean_t forwarded;
1379 if (sin->sin_addr.s_addr != INADDR_ANY)
1380 inp->inp_flags |= INP_WASBOUND_NOTANY;
1382 forwarded = udp_inswildcardhash(inp,
1383 &msg->bind.base, 0);
1386 * The message is further forwarded, so
1395 lwkt_replymsg(&msg->bind.base.lmsg, error);
1399 udp_connect(netmsg_t msg)
1401 struct socket *so = msg->connect.base.nm_so;
1402 struct sockaddr *nam = msg->connect.nm_nam;
1403 struct thread *td = msg->connect.nm_td;
1405 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1406 struct sockaddr_in *if_sin;
1407 struct lwkt_port *port;
1410 KKASSERT(msg->connect.nm_m == NULL);
1418 if (msg->connect.nm_flags & PRUC_RECONNECT) {
1419 msg->connect.nm_flags &= ~PRUC_RECONNECT;
1420 in_pcblink(inp, &udbinfo[mycpuid]);
1423 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1430 * Bind if we have to
1432 if (inp->inp_lport == 0) {
1433 error = in_pcbbind(inp, NULL, td);
1439 * Calculate the correct protocol processing thread. The connect
1440 * operation must run there.
1442 error = in_pcbladdr(inp, nam, &if_sin, td);
1445 if (!prison_remote_ip(td, nam)) {
1446 error = EAFNOSUPPORT; /* IPv6 only jail */
1450 port = udp_addrport(sin->sin_addr.s_addr, sin->sin_port,
1451 inp->inp_laddr.s_addr != INADDR_ANY ?
1452 inp->inp_laddr.s_addr : if_sin->sin_addr.s_addr, inp->inp_lport);
1453 if (port != &curthread->td_msgport) {
1454 lwkt_msg_t lmsg = &msg->connect.base.lmsg;
1455 int nm_flags = PRUC_RECONNECT;
1458 * in_pcbladdr() may have allocated a route entry for us
1459 * on the current CPU, but we need a route entry on the
1460 * inpcb's owner CPU, so free it here.
1462 in_pcbresetroute(inp);
1464 if (inp->inp_flags & INP_WILDCARD) {
1466 * Remove this inpcb from the wildcard hash before
1467 * the socket's msgport changes.
1469 udp_remwildcardhash(inp);
1473 * We are moving the protocol processing port the socket
1474 * is on, we have to unlink here and re-link on the
1477 in_pcbunlink(inp, &udbinfo[mycpuid]);
1478 msg->connect.nm_flags |= nm_flags;
1480 /* See the related comment in tcp_usrreq.c tcp_connect() */
1481 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1482 lwkt_forwardmsg(port, lmsg);
1483 /* msg invalid now */
1486 error = udp_connect_oncpu(inp, sin, if_sin);
1488 if (error && inp != NULL && inp->inp_lport != 0 &&
1489 (inp->inp_flags & INP_WILDCARD) == 0) {
1490 boolean_t forwarded;
1492 /* Connect failed; put it to wildcard hash. */
1493 forwarded = udp_inswildcardhash(inp, &msg->connect.base,
1497 * The message is further forwarded, so we are done
1503 lwkt_replymsg(&msg->connect.base.lmsg, error);
1507 udp_remwildcardhash(struct inpcb *inp)
1511 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid],
1512 ("not on owner cpu"));
1514 for (cpu = 0; cpu < ncpus2; ++cpu) {
1515 if (cpu == mycpuid) {
1517 * This inpcb will be removed by the later
1518 * in_pcbremwildcardhash().
1522 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpu]);
1524 in_pcbremwildcardhash(inp);
1528 udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin,
1529 struct sockaddr_in *if_sin)
1531 struct socket *so = inp->inp_socket;
1534 oinp = in_pcblookup_hash(inp->inp_pcbinfo,
1535 sin->sin_addr, sin->sin_port,
1536 inp->inp_laddr.s_addr != INADDR_ANY ?
1537 inp->inp_laddr : if_sin->sin_addr, inp->inp_lport, FALSE, NULL);
1542 * No more errors can occur, finish adjusting the socket
1543 * and change the processing port to reflect the connected
1544 * socket. Once set we can no longer safely mess with the
1548 if (inp->inp_flags & INP_WILDCARD)
1549 udp_remwildcardhash(inp);
1551 if (inp->inp_laddr.s_addr == INADDR_ANY)
1552 inp->inp_laddr = if_sin->sin_addr;
1553 inp->inp_faddr = sin->sin_addr;
1554 inp->inp_fport = sin->sin_port;
1555 in_pcbinsconnhash(inp);
1563 udp_detach2(struct socket *so)
1565 in_pcbdetach(so->so_pcb);
1571 udp_detach_final_dispatch(netmsg_t msg)
1573 udp_detach2(msg->base.nm_so);
1577 udp_detach_oncpu_dispatch(netmsg_t msg)
1579 struct netmsg_base *clomsg = &msg->base;
1580 struct socket *so = clomsg->nm_so;
1581 struct inpcb *inp = so->so_pcb;
1582 struct thread *td = curthread;
1583 int nextcpu, cpuid = mycpuid;
1585 KASSERT(td->td_type == TD_TYPE_NETISR, ("not in netisr"));
1587 if (inp->inp_flags & INP_WILDCARD) {
1589 * This inp will be removed on the inp's
1590 * owner CPU later, so don't do it now.
1592 if (&td->td_msgport != so->so_port)
1593 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpuid]);
1598 * Free and clear multicast socket option,
1599 * which is only accessed in netisr0.
1601 ip_freemoptions(inp->inp_moptions);
1602 inp->inp_moptions = NULL;
1605 nextcpu = cpuid + 1;
1606 if (nextcpu < ncpus2) {
1607 lwkt_forwardmsg(netisr_cpuport(nextcpu), &clomsg->lmsg);
1610 * No one could see this inpcb now; destroy this
1611 * inpcb in its owner netisr.
1613 netmsg_init(clomsg, so, &netisr_apanic_rport, 0,
1614 udp_detach_final_dispatch);
1615 lwkt_sendmsg(so->so_port, &clomsg->lmsg);
1620 udp_detach(netmsg_t msg)
1622 struct socket *so = msg->detach.base.nm_so;
1623 struct netmsg_base *clomsg;
1628 lwkt_replymsg(&msg->detach.base.lmsg, EINVAL);
1633 * Reply EJUSTRETURN ASAP, we will call sodiscard() and
1636 lwkt_replymsg(&msg->detach.base.lmsg, EJUSTRETURN);
1639 /* Only one CPU, detach the inpcb directly. */
1645 * Remove this inpcb from the inpcb list first, so that
1646 * no one could find this inpcb from the inpcb list.
1650 if (inp->inp_flags & INP_DIRECT_DETACH) {
1652 * Direct detaching is allowed
1654 KASSERT((inp->inp_flags & INP_WILDCARD) == 0,
1655 ("in the wildcardhash"));
1656 KASSERT(inp->inp_moptions == NULL, ("has mcast options"));
1662 * Go through netisrs which process UDP to make sure
1663 * no one could find this inpcb anymore.
1665 clomsg = &so->so_clomsg;
1666 netmsg_init(clomsg, so, &netisr_apanic_rport, MSGF_IGNSOPORT,
1667 udp_detach_oncpu_dispatch);
1668 lwkt_sendmsg(netisr_cpuport(0), &clomsg->lmsg);
1672 udp_disconnect(netmsg_t msg)
1674 struct socket *so = msg->disconnect.base.nm_so;
1676 boolean_t forwarded;
1684 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1689 soclrstate(so, SS_ISCONNECTED); /* XXX */
1691 in_pcbdisconnect(inp);
1694 * Follow traditional BSD behavior and retain the local port
1695 * binding. But, fix the old misbehavior of overwriting any
1696 * previously bound local address.
1698 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
1699 inp->inp_laddr.s_addr = INADDR_ANY;
1701 if (so->so_state & SS_ISCLOSING) {
1703 * If this socket is being closed, there is no need
1704 * to put this socket back into wildcard hash table.
1710 forwarded = udp_inswildcardhash(inp, &msg->disconnect.base, 0);
1713 * The message is further forwarded, so we are done
1719 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
1723 udp_shutdown(netmsg_t msg)
1725 struct socket *so = msg->shutdown.base.nm_so;
1736 lwkt_replymsg(&msg->shutdown.base.lmsg, error);
1739 struct pr_usrreqs udp_usrreqs = {
1740 .pru_abort = udp_abort,
1741 .pru_accept = pr_generic_notsupp,
1742 .pru_attach = udp_attach,
1743 .pru_bind = udp_bind,
1744 .pru_connect = udp_connect,
1745 .pru_connect2 = pr_generic_notsupp,
1746 .pru_control = in_control_dispatch,
1747 .pru_detach = udp_detach,
1748 .pru_disconnect = udp_disconnect,
1749 .pru_listen = pr_generic_notsupp,
1750 .pru_peeraddr = in_setpeeraddr_dispatch,
1751 .pru_rcvd = pr_generic_notsupp,
1752 .pru_rcvoob = pr_generic_notsupp,
1753 .pru_send = udp_send,
1754 .pru_sense = pru_sense_null,
1755 .pru_shutdown = udp_shutdown,
1756 .pru_sockaddr = in_setsockaddr_dispatch,
1757 .pru_sosend = sosendudp,
1758 .pru_soreceive = soreceive