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.
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22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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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
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52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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;
190 struct sockaddr_in6 uin6_sin;
191 u_char uin6_init_done : 1;
194 struct ip6_hdr uip6_ip6;
195 u_char uip6_init_done : 1;
202 static void udp_append (struct inpcb *last, struct ip *ip,
203 struct mbuf *n, int off, struct sockaddr_in *udp_in,
204 struct udp_in6 *, struct udp_ip6 *);
206 static void ip_2_ip6_hdr (struct ip6_hdr *ip6, struct ip *ip);
209 static int udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin,
210 struct sockaddr_in *if_sin);
212 static boolean_t udp_inswildcardhash(struct inpcb *inp,
213 struct netmsg_base *msg, int error);
214 static void udp_remwildcardhash(struct inpcb *inp);
219 struct inpcbportinfo *portinfo;
222 portinfo = kmalloc_cachealign(sizeof(*portinfo) * ncpus2, M_PCB,
225 for (cpu = 0; cpu < ncpus2; cpu++) {
226 struct inpcbinfo *uicb = &udbinfo[cpu];
230 * UDP pcb list, wildcard hash table and localgroup hash
233 in_pcbinfo_init(uicb, cpu, TRUE);
234 uicb->hashbase = hashinit(UDBHASHSIZE, M_PCB, &uicb->hashmask);
236 in_pcbportinfo_init(&portinfo[cpu], UDBHASHSIZE, TRUE, cpu);
237 uicb->portinfo = portinfo;
238 uicb->portinfo_mask = ncpus2_mask;
240 uicb->wildcardhashbase = hashinit(UDBHASHSIZE, M_PCB,
241 &uicb->wildcardhashmask);
242 uicb->localgrphashbase = hashinit(UDBHASHSIZE, M_PCB,
243 &uicb->localgrphashmask);
245 uicb->ipi_size = sizeof(struct inpcb);
249 * Initialize UDP statistics counters for each CPU.
251 for (cpu = 0; cpu < ncpus; ++cpu)
252 bzero(&udpstat_percpu[cpu], sizeof(struct udpstat));
256 sysctl_udpstat(SYSCTL_HANDLER_ARGS)
260 for (cpu = 0; cpu < ncpus; ++cpu) {
261 if ((error = SYSCTL_OUT(req, &udpstat_percpu[cpu],
262 sizeof(struct udpstat))))
264 if ((error = SYSCTL_IN(req, &udpstat_percpu[cpu],
265 sizeof(struct udpstat))))
271 SYSCTL_PROC(_net_inet_udp, UDPCTL_STATS, stats, (CTLTYPE_OPAQUE | CTLFLAG_RW),
272 0, 0, sysctl_udpstat, "S,udpstat", "UDP statistics");
275 udp_ctloutput(netmsg_t msg)
277 struct socket *so = msg->base.nm_so;
278 struct sockopt *sopt = msg->ctloutput.nm_sopt;
279 struct inpcb *inp = so->so_pcb;
281 if (sopt->sopt_level == IPPROTO_IP) {
282 switch (sopt->sopt_name) {
283 case IP_MULTICAST_IF:
284 case IP_MULTICAST_VIF:
285 case IP_MULTICAST_TTL:
286 case IP_MULTICAST_LOOP:
287 case IP_ADD_MEMBERSHIP:
288 case IP_DROP_MEMBERSHIP:
289 if (&curthread->td_msgport != netisr_cpuport(0)) {
291 * This pr_ctloutput msg will be forwarded
292 * to netisr0 to run; we can't do direct
295 inp->inp_flags &= ~INP_DIRECT_DETACH;
300 return ip_ctloutput(msg);
304 * Check multicast packets to make sure they are only sent to sockets with
305 * multicast memberships for the packet's destination address and arrival
306 * interface. Multicast packets to multicast-unaware sockets are also
309 * Returns 0 if the packet is acceptable, -1 if it is not.
312 check_multicast_membership(const struct ip *ip, const struct inpcb *inp,
313 const struct mbuf *m)
315 const struct ip_moptions *mopt;
318 if (strict_mcast_mship == 0 ||
319 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
323 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
324 ("multicast input not in netisr0"));
326 mopt = inp->inp_moptions;
329 for (mshipno = 0; mshipno < mopt->imo_num_memberships; ++mshipno) {
330 const struct in_multi *maddr = mopt->imo_membership[mshipno];
332 if (ip->ip_dst.s_addr == maddr->inm_addr.s_addr &&
333 m->m_pkthdr.rcvif == maddr->inm_ifp) {
340 struct udp_mcast_arg {
346 struct sockaddr_in *udp_in;
348 struct udp_in6 *udp_in6;
349 struct udp_ip6 *udp_ip6;
354 udp_mcast_input(struct udp_mcast_arg *arg)
356 struct inpcb *inp = arg->inp;
357 struct inpcb *last = arg->last;
358 struct ip *ip = arg->ip;
359 struct mbuf *m = arg->m;
361 if (check_multicast_membership(ip, inp, m) < 0)
362 return ERESTART; /* caller continue */
368 /* check AH/ESP integrity. */
369 if (ipsec4_in_reject_so(m, last->inp_socket))
370 ipsecstat.in_polvio++;
371 /* do not inject data to pcb */
375 /* check AH/ESP integrity. */
376 if (ipsec4_in_reject(m, last))
379 #endif /*FAST_IPSEC*/
380 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL)
381 udp_append(last, ip, n,
382 arg->iphlen + sizeof(struct udphdr),
385 arg->udp_in6, arg->udp_ip6
391 arg->last = last = inp;
394 * Don't look for additional matches if this one does
395 * not have either the SO_REUSEPORT or SO_REUSEADDR
396 * socket options set. This heuristic avoids searching
397 * through all pcbs in the common case of a non-shared
398 * port. It * assumes that an application will never
399 * clear these options after setting them.
401 if (!(last->inp_socket->so_options &
402 (SO_REUSEPORT | SO_REUSEADDR)))
403 return EJUSTRETURN; /* caller stop */
408 udp_input(struct mbuf **mp, int *offp, int proto)
410 struct sockaddr_in udp_in = { sizeof udp_in, AF_INET };
412 struct udp_in6 udp_in6 = {
413 { sizeof udp_in6.uin6_sin, AF_INET6 }, 0
415 struct udp_ip6 udp_ip6;
423 struct mbuf *opts = NULL;
426 struct sockaddr *append_sa;
427 struct inpcbinfo *pcbinfo = &udbinfo[mycpuid];
434 udp_stat.udps_ipackets++;
437 * Strip IP options, if any; should skip this,
438 * make available to user, and use on returned packets,
439 * but we don't yet have a way to check the checksum
440 * with options still present.
442 if (iphlen > sizeof(struct ip)) {
444 iphlen = sizeof(struct ip);
448 * IP and UDP headers are together in first mbuf.
449 * Already checked and pulled up in ip_demux().
451 KASSERT(m->m_len >= iphlen + sizeof(struct udphdr),
452 ("UDP header not in one mbuf"));
454 ip = mtod(m, struct ip *);
455 uh = (struct udphdr *)((caddr_t)ip + iphlen);
457 /* destination port of 0 is illegal, based on RFC768. */
458 if (uh->uh_dport == 0)
462 * Make mbuf data length reflect UDP length.
463 * If not enough data to reflect UDP length, drop.
465 len = ntohs((u_short)uh->uh_ulen);
466 if (ip->ip_len != len) {
467 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
468 udp_stat.udps_badlen++;
471 m_adj(m, len - ip->ip_len);
472 /* ip->ip_len = len; */
475 * Save a copy of the IP header in case we want restore it
476 * for sending an ICMP error message in response.
481 * Checksum extended UDP header and data.
484 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
485 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
486 uh->uh_sum = m->m_pkthdr.csum_data;
488 uh->uh_sum = in_pseudo(ip->ip_src.s_addr,
489 ip->ip_dst.s_addr, htonl((u_short)len +
490 m->m_pkthdr.csum_data + IPPROTO_UDP));
491 uh->uh_sum ^= 0xffff;
495 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
496 bzero(((struct ipovly *)ip)->ih_x1, 9);
497 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
498 uh->uh_sum = in_cksum(m, len + sizeof(struct ip));
499 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
502 udp_stat.udps_badsum++;
504 return(IPPROTO_DONE);
507 udp_stat.udps_nosum++;
509 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
510 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
511 struct inpcbhead *connhead;
512 struct inpcontainer *ic, *ic_marker;
513 struct inpcontainerhead *ichead;
514 struct udp_mcast_arg arg;
519 * Deliver a multicast or broadcast datagram to *all* sockets
520 * for which the local and remote addresses and ports match
521 * those of the incoming datagram. This allows more than
522 * one process to receive multi/broadcasts on the same port.
523 * (This really ought to be done for unicast datagrams as
524 * well, but that would cause problems with existing
525 * applications that open both address-specific sockets and
526 * a wildcard socket listening to the same port -- they would
527 * end up receiving duplicates of every unicast datagram.
528 * Those applications open the multiple sockets to overcome an
529 * inadequacy of the UDP socket interface, but for backwards
530 * compatibility we avoid the problem here rather than
531 * fixing the interface. Maybe 4.5BSD will remedy this?)
535 * Construct sockaddr format source address.
537 udp_in.sin_port = uh->uh_sport;
538 udp_in.sin_addr = ip->ip_src;
539 arg.udp_in = &udp_in;
541 * Locate pcb(s) for datagram.
542 * (Algorithm copied from raw_intr().)
546 udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0;
547 arg.udp_in6 = &udp_in6;
548 arg.udp_ip6 = &udp_ip6;
552 connhead = &pcbinfo->hashbase[
553 INP_PCBCONNHASH(ip->ip_src.s_addr, uh->uh_sport,
554 ip->ip_dst.s_addr, uh->uh_dport, pcbinfo->hashmask)];
555 LIST_FOREACH(inp, connhead, inp_hash) {
557 if (!(inp->inp_vflag & INP_IPV4))
560 if (!in_hosteq(inp->inp_faddr, ip->ip_src) ||
561 !in_hosteq(inp->inp_laddr, ip->ip_dst) ||
562 inp->inp_fport != uh->uh_sport ||
563 inp->inp_lport != uh->uh_dport)
571 error = udp_mcast_input(&arg);
572 if (error == ERESTART)
576 if (error == EJUSTRETURN)
580 ichead = &pcbinfo->wildcardhashbase[
581 INP_PCBWILDCARDHASH(uh->uh_dport,
582 pcbinfo->wildcardhashmask)];
583 ic_marker = in_pcbcontainer_marker(mycpuid);
585 GET_PCBINFO_TOKEN(pcbinfo);
586 LIST_INSERT_HEAD(ichead, ic_marker, ic_list);
587 while ((ic = LIST_NEXT(ic_marker, ic_list)) != NULL) {
588 LIST_REMOVE(ic_marker, ic_list);
589 LIST_INSERT_AFTER(ic, ic_marker, ic_list);
592 if (inp->inp_flags & INP_PLACEMARKER)
595 if (!(inp->inp_vflag & INP_IPV4))
598 if (inp->inp_lport != uh->uh_dport)
600 if (inp->inp_laddr.s_addr != INADDR_ANY &&
601 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
609 error = udp_mcast_input(&arg);
610 if (error == ERESTART)
614 if (error == EJUSTRETURN)
617 LIST_REMOVE(ic_marker, ic_list);
618 REL_PCBINFO_TOKEN(pcbinfo);
622 * No matching pcb found; discard datagram.
623 * (No need to send an ICMP Port Unreachable
624 * for a broadcast or multicast datgram.)
626 udp_stat.udps_noportbcast++;
630 /* check AH/ESP integrity. */
631 if (ipsec4_in_reject_so(m, last->inp_socket)) {
632 ipsecstat.in_polvio++;
637 /* check AH/ESP integrity. */
638 if (ipsec4_in_reject(m, last))
640 #endif /*FAST_IPSEC*/
641 udp_append(last, ip, m, iphlen + sizeof(struct udphdr),
649 return(IPPROTO_DONE);
652 * Locate pcb for datagram.
654 inp = in_pcblookup_pkthash(pcbinfo, ip->ip_src, uh->uh_sport,
655 ip->ip_dst, uh->uh_dport, TRUE, m->m_pkthdr.rcvif,
656 udp_reuseport_ext ? m : NULL);
659 char buf[sizeof "aaa.bbb.ccc.ddd"];
661 strcpy(buf, inet_ntoa(ip->ip_dst));
663 "Connection attempt to UDP %s:%d from %s:%d\n",
664 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
665 ntohs(uh->uh_sport));
667 udp_stat.udps_noport++;
668 if (m->m_flags & (M_BCAST | M_MCAST)) {
669 udp_stat.udps_noportbcast++;
675 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
679 ip->ip_len += iphlen;
680 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
681 return(IPPROTO_DONE);
684 if (ipsec4_in_reject_so(m, inp->inp_socket)) {
685 ipsecstat.in_polvio++;
690 if (ipsec4_in_reject(m, inp))
692 #endif /*FAST_IPSEC*/
694 * Check the minimum TTL for socket.
696 if (ip->ip_ttl < inp->inp_ip_minttl)
700 * Construct sockaddr format source address.
701 * Stuff source address and datagram in user buffer.
703 udp_in.sin_port = uh->uh_sport;
704 udp_in.sin_addr = ip->ip_src;
705 if ((inp->inp_flags & INP_CONTROLOPTS) ||
706 (inp->inp_socket->so_options & SO_TIMESTAMP)) {
708 if (inp->inp_vflag & INP_IPV6) {
711 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
712 savedflags = inp->inp_flags;
713 inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
714 ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m);
715 inp->inp_flags = savedflags;
718 ip_savecontrol(inp, &opts, ip, m);
720 m_adj(m, iphlen + sizeof(struct udphdr));
722 if (inp->inp_vflag & INP_IPV6) {
723 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
724 append_sa = (struct sockaddr *)&udp_in6;
727 append_sa = (struct sockaddr *)&udp_in;
729 lwkt_gettoken(&inp->inp_socket->so_rcv.ssb_token);
730 if (ssb_appendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) {
731 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
732 udp_stat.udps_fullsock++;
735 lwkt_reltoken(&inp->inp_socket->so_rcv.ssb_token);
736 sorwakeup(inp->inp_socket);
737 return(IPPROTO_DONE);
742 return(IPPROTO_DONE);
747 ip_2_ip6_hdr(struct ip6_hdr *ip6, struct ip *ip)
749 bzero(ip6, sizeof *ip6);
751 ip6->ip6_vfc = IPV6_VERSION;
752 ip6->ip6_plen = ip->ip_len;
753 ip6->ip6_nxt = ip->ip_p;
754 ip6->ip6_hlim = ip->ip_ttl;
755 ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] =
757 ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr;
758 ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr;
763 * subroutine of udp_input(), mainly for source code readability.
764 * caller must properly init udp_ip6 and udp_in6 beforehand.
767 udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n, int off,
768 struct sockaddr_in *udp_in,
769 struct udp_in6 *udp_in6, struct udp_ip6 *udp_ip6)
771 struct sockaddr *append_sa;
772 struct mbuf *opts = NULL;
775 if (last->inp_flags & INP_CONTROLOPTS ||
776 last->inp_socket->so_options & SO_TIMESTAMP) {
778 if (last->inp_vflag & INP_IPV6) {
781 if (udp_ip6->uip6_init_done == 0) {
782 ip_2_ip6_hdr(&udp_ip6->uip6_ip6, ip);
783 udp_ip6->uip6_init_done = 1;
785 savedflags = last->inp_flags;
786 last->inp_flags &= ~INP_UNMAPPABLEOPTS;
787 ip6_savecontrol(last, &opts, &udp_ip6->uip6_ip6, n);
788 last->inp_flags = savedflags;
791 ip_savecontrol(last, &opts, ip, n);
794 if (last->inp_vflag & INP_IPV6) {
795 if (udp_in6->uin6_init_done == 0) {
796 in6_sin_2_v4mapsin6(udp_in, &udp_in6->uin6_sin);
797 udp_in6->uin6_init_done = 1;
799 append_sa = (struct sockaddr *)&udp_in6->uin6_sin;
802 append_sa = (struct sockaddr *)udp_in;
805 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
806 ret = ssb_appendaddr(&last->inp_socket->so_rcv, append_sa, n, opts);
807 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
812 udp_stat.udps_fullsock++;
814 sorwakeup(last->inp_socket);
819 * Notify a udp user of an asynchronous error;
820 * just wake up so that he can collect error status.
823 udp_notify(struct inpcb *inp, int error)
825 inp->inp_socket->so_error = error;
826 sorwakeup(inp->inp_socket);
827 sowwakeup(inp->inp_socket);
830 struct netmsg_udp_notify {
831 struct netmsg_base base;
832 void (*nm_notify)(struct inpcb *, int);
833 struct in_addr nm_faddr;
838 udp_notifyall_oncpu(netmsg_t msg)
840 struct netmsg_udp_notify *nm = (struct netmsg_udp_notify *)msg;
841 int nextcpu, cpu = mycpuid;
843 in_pcbnotifyall(&udbinfo[cpu], nm->nm_faddr, nm->nm_arg, nm->nm_notify);
846 if (nextcpu < ncpus2)
847 lwkt_forwardmsg(netisr_cpuport(nextcpu), &nm->base.lmsg);
849 lwkt_replymsg(&nm->base.lmsg, 0);
853 udp_ctlinput(netmsg_t msg)
855 struct sockaddr *sa = msg->ctlinput.nm_arg;
856 struct ip *ip = msg->ctlinput.nm_extra;
857 int cmd = msg->ctlinput.nm_cmd;
859 void (*notify) (struct inpcb *, int) = udp_notify;
860 struct in_addr faddr;
863 faddr = ((struct sockaddr_in *)sa)->sin_addr;
864 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
867 if (PRC_IS_REDIRECT(cmd)) {
869 notify = in_rtchange;
870 } else if (cmd == PRC_HOSTDEAD) {
872 } else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0) {
877 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
878 inp = in_pcblookup_hash(&udbinfo[mycpuid], faddr, uh->uh_dport,
879 ip->ip_src, uh->uh_sport, 0, NULL);
880 if (inp != NULL && inp->inp_socket != NULL)
881 (*notify)(inp, inetctlerrmap[cmd]);
883 struct netmsg_udp_notify *nm;
885 KKASSERT(&curthread->td_msgport == netisr_cpuport(0));
886 nm = kmalloc(sizeof(*nm), M_LWKTMSG, M_INTWAIT);
887 netmsg_init(&nm->base, NULL, &netisr_afree_rport,
888 0, udp_notifyall_oncpu);
889 nm->nm_faddr = faddr;
890 nm->nm_arg = inetctlerrmap[cmd];
891 nm->nm_notify = notify;
892 lwkt_sendmsg(netisr_cpuport(0), &nm->base.lmsg);
895 lwkt_replymsg(&msg->lmsg, 0);
898 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, udbinfo, 0,
899 in_pcblist_global_ncpus2, "S,xinpcb", "List of active UDP sockets");
902 udp_getcred(SYSCTL_HANDLER_ARGS)
904 struct sockaddr_in addrs[2];
905 struct ucred cred0, *cred = NULL;
907 int error, cpu, origcpu;
909 error = priv_check(req->td, PRIV_ROOT);
912 error = SYSCTL_IN(req, addrs, sizeof addrs);
917 cpu = udp_addrcpu(addrs[1].sin_addr.s_addr, addrs[1].sin_port,
918 addrs[0].sin_addr.s_addr, addrs[0].sin_port);
920 lwkt_migratecpu(cpu);
922 inp = in_pcblookup_hash(&udbinfo[cpu],
923 addrs[1].sin_addr, addrs[1].sin_port,
924 addrs[0].sin_addr, addrs[0].sin_port, TRUE, NULL);
925 if (inp == NULL || inp->inp_socket == NULL) {
927 } else if (inp->inp_socket->so_cred != NULL) {
928 cred0 = *(inp->inp_socket->so_cred);
932 lwkt_migratecpu(origcpu);
937 return SYSCTL_OUT(req, cred, sizeof(struct ucred));
939 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
940 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
943 udp_send_redispatch(netmsg_t msg)
945 struct mbuf *m = msg->send.nm_m;
946 int pru_flags = msg->send.nm_flags;
947 struct inpcb *inp = msg->send.base.nm_so->so_pcb;
948 struct mbuf *m_opt = msg->send.nm_control; /* XXX save ipopt */
949 int flags = msg->send.nm_priv; /* ip_output flags */
952 logudp(redisp_ipout_beg, inp);
955 * - Don't use inp route cache. It should only be used in the
957 * - Access to inp_moptions should be safe, since multicast UDP
958 * datagrams are redispatched to netisr0 and inp_moptions is
959 * changed only in netisr0.
961 error = ip_output(m, m_opt, NULL, flags, inp->inp_moptions, inp);
962 if ((pru_flags & PRUS_NOREPLY) == 0)
963 lwkt_replymsg(&msg->send.base.lmsg, error);
966 /* Free saved ip options, if any */
970 logudp(redisp_ipout_end, inp);
974 udp_send(netmsg_t msg)
976 struct socket *so = msg->send.base.nm_so;
977 struct mbuf *m = msg->send.nm_m;
978 struct sockaddr *dstaddr = msg->send.nm_addr;
979 int pru_flags = msg->send.nm_flags;
980 struct inpcb *inp = so->so_pcb;
981 struct thread *td = msg->send.nm_td;
985 int len = m->m_pkthdr.len;
986 struct sockaddr_in *sin; /* really is initialized before use */
989 KKASSERT(msg->send.nm_control == NULL);
991 logudp(send_beg, inp);
998 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
1003 if (inp->inp_lport == 0) { /* unbound socket */
1004 boolean_t forwarded;
1006 error = in_pcbbind(inp, NULL, td);
1011 * Need to call udp_send again, after this inpcb is
1012 * inserted into wildcard hash table.
1014 msg->send.base.lmsg.ms_flags |= MSGF_UDP_SEND;
1015 forwarded = udp_inswildcardhash(inp, &msg->send.base, 0);
1018 * The message is further forwarded, so we are
1021 logudp(send_inswildcard, inp);
1026 if (dstaddr != NULL) { /* destination address specified */
1027 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1028 /* already connected */
1032 sin = (struct sockaddr_in *)dstaddr;
1033 if (!prison_remote_ip(td, (struct sockaddr *)&sin)) {
1034 error = EAFNOSUPPORT; /* IPv6 only jail */
1038 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1039 /* no destination specified and not already connected */
1047 * Calculate data length and get a mbuf
1048 * for UDP and IP headers.
1050 M_PREPEND(m, sizeof(struct udpiphdr), MB_DONTWAIT);
1057 * Fill in mbuf with extended UDP header
1058 * and addresses and length put into network format.
1060 ui = mtod(m, struct udpiphdr *);
1061 bzero(ui->ui_x1, sizeof ui->ui_x1); /* XXX still needed? */
1062 ui->ui_pr = IPPROTO_UDP;
1065 * Set destination address.
1067 if (dstaddr != NULL) { /* use specified destination */
1068 ui->ui_dst = sin->sin_addr;
1069 ui->ui_dport = sin->sin_port;
1070 } else { /* use connected destination */
1071 ui->ui_dst = inp->inp_faddr;
1072 ui->ui_dport = inp->inp_fport;
1076 * Set source address.
1078 if (inp->inp_laddr.s_addr == INADDR_ANY ||
1079 IN_MULTICAST(ntohl(inp->inp_laddr.s_addr))) {
1080 struct sockaddr_in *if_sin;
1082 if (dstaddr == NULL) {
1084 * connect() had (or should have) failed because
1085 * the interface had no IP address, but the
1086 * application proceeded to call send() anyways.
1092 /* Look up outgoing interface. */
1093 error = in_pcbladdr_find(inp, dstaddr, &if_sin, td, 1);
1096 ui->ui_src = if_sin->sin_addr; /* use address of interface */
1098 ui->ui_src = inp->inp_laddr; /* use non-null bound address */
1100 ui->ui_sport = inp->inp_lport;
1101 KASSERT(inp->inp_lport != 0, ("inp lport should have been bound"));
1104 * Release the original thread, since it is no longer used
1106 if (pru_flags & PRUS_HELDTD) {
1108 pru_flags &= ~PRUS_HELDTD;
1111 * Free the dest address, since it is no longer needed
1113 if (pru_flags & PRUS_FREEADDR) {
1114 kfree(dstaddr, M_SONAME);
1115 pru_flags &= ~PRUS_FREEADDR;
1118 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
1121 * Set up checksum and output datagram.
1124 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
1125 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
1126 m->m_pkthdr.csum_flags = CSUM_UDP;
1127 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
1128 m->m_pkthdr.csum_thlen = sizeof(struct udphdr);
1132 ((struct ip *)ui)->ip_len = sizeof(struct udpiphdr) + len;
1133 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
1134 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
1135 udp_stat.udps_opackets++;
1137 flags = IP_DEBUGROUTE |
1138 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST));
1139 if (pru_flags & PRUS_DONTROUTE)
1140 flags |= SO_DONTROUTE;
1142 if (inp->inp_flags & INP_CONNECTED) {
1144 * For connected socket, this datagram has already
1145 * been in the correct netisr; no need to rehash.
1150 cpu = udp_addrcpu(ui->ui_dst.s_addr, ui->ui_dport,
1151 ui->ui_src.s_addr, ui->ui_sport);
1152 if (cpu != mycpuid) {
1153 struct mbuf *m_opt = NULL;
1154 struct netmsg_pru_send *smsg;
1155 struct lwkt_port *port = netisr_cpuport(cpu);
1158 * Not on the CPU that matches this UDP datagram hash;
1159 * redispatch to the correct CPU to do the ip_output().
1161 if (inp->inp_options != NULL) {
1163 * If there are ip options, then save a copy,
1164 * since accessing inp_options on other CPUs'
1167 * XXX optimize this?
1169 m_opt = m_copym(inp->inp_options, 0, M_COPYALL,
1172 if ((pru_flags & PRUS_NOREPLY) == 0) {
1174 * Change some parts of the original netmsg and
1175 * forward it to the target netisr.
1177 * NOTE: so_port MUST NOT be checked in the target
1181 smsg->nm_priv = flags; /* ip_output flags */
1183 smsg->nm_control = m_opt; /* XXX save ipopt */
1184 smsg->base.lmsg.ms_flags |= MSGF_IGNSOPORT;
1185 smsg->base.nm_dispatch = udp_send_redispatch;
1186 lwkt_forwardmsg(port, &smsg->base.lmsg);
1189 * Recreate the netmsg, since the original mbuf
1190 * could have been changed. And send it to the
1193 * NOTE: so_port MUST NOT be checked in the target
1196 smsg = &m->m_hdr.mh_sndmsg;
1197 netmsg_init(&smsg->base, so, &netisr_apanic_rport,
1198 MSGF_IGNSOPORT, udp_send_redispatch);
1199 smsg->nm_priv = flags; /* ip_output flags */
1200 smsg->nm_flags = pru_flags;
1202 smsg->nm_control = m_opt; /* XXX save ipopt */
1203 lwkt_sendmsg(port, &smsg->base.lmsg);
1206 /* This UDP datagram is redispatched; done */
1207 logudp(send_redisp, inp);
1212 logudp(send_ipout, inp);
1213 error = ip_output(m, inp->inp_options, &inp->inp_route, flags,
1214 inp->inp_moptions, inp);
1221 if (pru_flags & PRUS_HELDTD)
1223 if (pru_flags & PRUS_FREEADDR)
1224 kfree(dstaddr, M_SONAME);
1225 if ((pru_flags & PRUS_NOREPLY) == 0)
1226 lwkt_replymsg(&msg->send.base.lmsg, error);
1228 logudp(send_end, inp);
1231 u_long udp_sendspace = 9216; /* really max datagram size */
1232 /* 40 1K datagrams */
1233 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
1234 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
1236 u_long udp_recvspace = 40 * (1024 +
1238 sizeof(struct sockaddr_in6)
1240 sizeof(struct sockaddr_in)
1243 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
1244 &udp_recvspace, 0, "Maximum incoming UDP datagram size");
1247 * This should never happen, since UDP socket does not support
1248 * connection acception (SO_ACCEPTCONN, i.e. listen(2)).
1251 udp_abort(netmsg_t msg __unused)
1253 panic("udp_abort is called");
1257 udp_attach(netmsg_t msg)
1259 struct socket *so = msg->attach.base.nm_so;
1260 struct pru_attach_info *ai = msg->attach.nm_ai;
1269 error = soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit);
1273 error = in_pcballoc(so, &udbinfo[mycpuid]);
1277 inp = (struct inpcb *)so->so_pcb;
1278 inp->inp_flags |= INP_DIRECT_DETACH;
1279 inp->inp_vflag |= INP_IPV4;
1280 inp->inp_ip_ttl = ip_defttl;
1283 lwkt_replymsg(&msg->attach.base.lmsg, error);
1287 udp_inswildcard_replymsg(netmsg_t msg)
1289 lwkt_msg_t lmsg = &msg->lmsg;
1291 if (lmsg->ms_flags & MSGF_UDP_SEND) {
1293 /* msg is replied by udp_send() */
1295 lwkt_replymsg(lmsg, lmsg->ms_error);
1300 udp_soreuseport_dispatch(netmsg_t msg)
1302 /* This inpcb has already been in the wildcard hash. */
1303 in_pcblink_flags(msg->base.nm_so->so_pcb, &udbinfo[mycpuid], 0);
1304 udp_inswildcard_replymsg(msg);
1308 udp_sosetport(struct lwkt_msg *msg, lwkt_port_t port)
1310 sosetport(((struct netmsg_base *)msg)->nm_so, port);
1314 udp_inswildcardhash_oncpu(struct inpcb *inp, struct netmsg_base *msg)
1318 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid],
1319 ("not on owner cpu"));
1321 in_pcbinswildcardhash(inp);
1322 for (cpu = 0; cpu < ncpus2; ++cpu) {
1323 if (cpu == mycpuid) {
1325 * This inpcb has been inserted by the above
1326 * in_pcbinswildcardhash().
1330 in_pcbinswildcardhash_oncpu(inp, &udbinfo[cpu]);
1333 if (inp->inp_socket->so_options & SO_REUSEPORT) {
1335 * For SO_REUSEPORT socket, redistribute it based on its
1336 * local group index.
1338 cpu = inp->inp_lgrpindex & ncpus2_mask;
1339 if (cpu != mycpuid) {
1340 struct lwkt_port *port = netisr_cpuport(cpu);
1341 lwkt_msg_t lmsg = &msg->lmsg;
1344 * We are moving the protocol processing port the
1345 * socket is on, we have to unlink here and re-link
1346 * on the target cpu (this inpcb is still left in
1347 * the wildcard hash).
1349 in_pcbunlink_flags(inp, &udbinfo[mycpuid], 0);
1350 msg->nm_dispatch = udp_soreuseport_dispatch;
1353 * See the related comment in tcp_usrreq.c
1356 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1357 lwkt_forwardmsg(port, lmsg);
1358 return TRUE; /* forwarded */
1365 udp_inswildcardhash_dispatch(netmsg_t msg)
1367 struct inpcb *inp = msg->base.nm_so->so_pcb;
1368 boolean_t forwarded;
1370 KASSERT(inp->inp_lport != 0, ("local port not set yet"));
1371 KASSERT((ntohs(inp->inp_lport) & ncpus2_mask) == mycpuid,
1372 ("not target cpu"));
1374 in_pcblink(inp, &udbinfo[mycpuid]);
1376 forwarded = udp_inswildcardhash_oncpu(inp, &msg->base);
1378 /* The message is further forwarded, so we are done here. */
1381 udp_inswildcard_replymsg(msg);
1385 udp_inswildcardhash(struct inpcb *inp, struct netmsg_base *msg, int error)
1387 lwkt_msg_t lmsg = &msg->lmsg;
1390 ASSERT_INP_NOTINHASH(inp);
1392 /* This inpcb could no longer be directly detached */
1393 inp->inp_flags &= ~INP_DIRECT_DETACH;
1396 * Always clear the route cache, so we don't need to
1397 * worry about any owner CPU changes later.
1399 in_pcbresetroute(inp);
1401 KASSERT(inp->inp_lport != 0, ("local port not set yet"));
1402 cpu = ntohs(inp->inp_lport) & ncpus2_mask;
1404 lmsg->ms_error = error;
1405 if (cpu != mycpuid) {
1406 struct lwkt_port *port = netisr_cpuport(cpu);
1409 * We are moving the protocol processing port the socket
1410 * is on, we have to unlink here and re-link on the
1413 in_pcbunlink(inp, &udbinfo[mycpuid]);
1414 msg->nm_dispatch = udp_inswildcardhash_dispatch;
1416 /* See the related comment in tcp_usrreq.c tcp_connect() */
1417 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1418 lwkt_forwardmsg(port, lmsg);
1419 return TRUE; /* forwarded */
1422 return udp_inswildcardhash_oncpu(inp, msg);
1426 udp_bind(netmsg_t msg)
1428 struct socket *so = msg->bind.base.nm_so;
1434 struct sockaddr *nam = msg->bind.nm_nam;
1435 struct thread *td = msg->bind.nm_td;
1437 error = in_pcbbind(inp, nam, td);
1439 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1440 boolean_t forwarded;
1442 if (sin->sin_addr.s_addr != INADDR_ANY)
1443 inp->inp_flags |= INP_WASBOUND_NOTANY;
1445 forwarded = udp_inswildcardhash(inp,
1446 &msg->bind.base, 0);
1449 * The message is further forwarded, so
1458 lwkt_replymsg(&msg->bind.base.lmsg, error);
1462 udp_connect(netmsg_t msg)
1464 struct socket *so = msg->connect.base.nm_so;
1465 struct sockaddr *nam = msg->connect.nm_nam;
1466 struct thread *td = msg->connect.nm_td;
1468 struct sockaddr_in *sin = (struct sockaddr_in *)nam;
1469 struct sockaddr_in *if_sin;
1470 struct lwkt_port *port;
1473 KKASSERT(msg->connect.nm_m == NULL);
1481 if (msg->connect.nm_flags & PRUC_RECONNECT) {
1482 msg->connect.nm_flags &= ~PRUC_RECONNECT;
1483 in_pcblink(inp, &udbinfo[mycpuid]);
1486 if (inp->inp_faddr.s_addr != INADDR_ANY) {
1493 * Bind if we have to
1495 if (inp->inp_lport == 0) {
1496 error = in_pcbbind(inp, NULL, td);
1502 * Calculate the correct protocol processing thread. The connect
1503 * operation must run there.
1505 error = in_pcbladdr(inp, nam, &if_sin, td);
1508 if (!prison_remote_ip(td, nam)) {
1509 error = EAFNOSUPPORT; /* IPv6 only jail */
1513 port = udp_addrport(sin->sin_addr.s_addr, sin->sin_port,
1514 inp->inp_laddr.s_addr != INADDR_ANY ?
1515 inp->inp_laddr.s_addr : if_sin->sin_addr.s_addr, inp->inp_lport);
1516 if (port != &curthread->td_msgport) {
1517 lwkt_msg_t lmsg = &msg->connect.base.lmsg;
1518 int nm_flags = PRUC_RECONNECT;
1521 * in_pcbladdr() may have allocated a route entry for us
1522 * on the current CPU, but we need a route entry on the
1523 * inpcb's owner CPU, so free it here.
1525 in_pcbresetroute(inp);
1527 if (inp->inp_flags & INP_WILDCARD) {
1529 * Remove this inpcb from the wildcard hash before
1530 * the socket's msgport changes.
1532 udp_remwildcardhash(inp);
1536 * We are moving the protocol processing port the socket
1537 * is on, we have to unlink here and re-link on the
1540 in_pcbunlink(inp, &udbinfo[mycpuid]);
1541 msg->connect.nm_flags |= nm_flags;
1543 /* See the related comment in tcp_usrreq.c tcp_connect() */
1544 lwkt_setmsg_receipt(lmsg, udp_sosetport);
1545 lwkt_forwardmsg(port, lmsg);
1546 /* msg invalid now */
1549 error = udp_connect_oncpu(inp, sin, if_sin);
1551 if (error && inp != NULL && inp->inp_lport != 0 &&
1552 (inp->inp_flags & INP_WILDCARD) == 0) {
1553 boolean_t forwarded;
1555 /* Connect failed; put it to wildcard hash. */
1556 forwarded = udp_inswildcardhash(inp, &msg->connect.base,
1560 * The message is further forwarded, so we are done
1566 lwkt_replymsg(&msg->connect.base.lmsg, error);
1570 udp_remwildcardhash(struct inpcb *inp)
1574 KASSERT(inp->inp_pcbinfo == &udbinfo[mycpuid],
1575 ("not on owner cpu"));
1577 for (cpu = 0; cpu < ncpus2; ++cpu) {
1578 if (cpu == mycpuid) {
1580 * This inpcb will be removed by the later
1581 * in_pcbremwildcardhash().
1585 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpu]);
1587 in_pcbremwildcardhash(inp);
1591 udp_connect_oncpu(struct inpcb *inp, struct sockaddr_in *sin,
1592 struct sockaddr_in *if_sin)
1594 struct socket *so = inp->inp_socket;
1597 oinp = in_pcblookup_hash(inp->inp_pcbinfo,
1598 sin->sin_addr, sin->sin_port,
1599 inp->inp_laddr.s_addr != INADDR_ANY ?
1600 inp->inp_laddr : if_sin->sin_addr, inp->inp_lport, FALSE, NULL);
1605 * No more errors can occur, finish adjusting the socket
1606 * and change the processing port to reflect the connected
1607 * socket. Once set we can no longer safely mess with the
1611 if (inp->inp_flags & INP_WILDCARD)
1612 udp_remwildcardhash(inp);
1614 if (inp->inp_laddr.s_addr == INADDR_ANY)
1615 inp->inp_laddr = if_sin->sin_addr;
1616 inp->inp_faddr = sin->sin_addr;
1617 inp->inp_fport = sin->sin_port;
1618 in_pcbinsconnhash(inp);
1626 udp_detach2(struct socket *so)
1628 in_pcbdetach(so->so_pcb);
1634 udp_detach_final_dispatch(netmsg_t msg)
1636 udp_detach2(msg->base.nm_so);
1640 udp_detach_oncpu_dispatch(netmsg_t msg)
1642 struct netmsg_base *clomsg = &msg->base;
1643 struct socket *so = clomsg->nm_so;
1644 struct inpcb *inp = so->so_pcb;
1645 struct thread *td = curthread;
1646 int nextcpu, cpuid = mycpuid;
1648 KASSERT(td->td_type == TD_TYPE_NETISR, ("not in netisr"));
1650 if (inp->inp_flags & INP_WILDCARD) {
1652 * This inp will be removed on the inp's
1653 * owner CPU later, so don't do it now.
1655 if (&td->td_msgport != so->so_port)
1656 in_pcbremwildcardhash_oncpu(inp, &udbinfo[cpuid]);
1661 * Free and clear multicast socket option,
1662 * which is only accessed in netisr0.
1664 ip_freemoptions(inp->inp_moptions);
1665 inp->inp_moptions = NULL;
1668 nextcpu = cpuid + 1;
1669 if (nextcpu < ncpus2) {
1670 lwkt_forwardmsg(netisr_cpuport(nextcpu), &clomsg->lmsg);
1673 * No one could see this inpcb now; destroy this
1674 * inpcb in its owner netisr.
1676 netmsg_init(clomsg, so, &netisr_apanic_rport, 0,
1677 udp_detach_final_dispatch);
1678 lwkt_sendmsg(so->so_port, &clomsg->lmsg);
1683 udp_detach(netmsg_t msg)
1685 struct socket *so = msg->detach.base.nm_so;
1686 struct netmsg_base *clomsg;
1691 lwkt_replymsg(&msg->detach.base.lmsg, EINVAL);
1696 * Reply EJUSTRETURN ASAP, we will call sodiscard() and
1699 lwkt_replymsg(&msg->detach.base.lmsg, EJUSTRETURN);
1702 /* Only one CPU, detach the inpcb directly. */
1708 * Remove this inpcb from the inpcb list first, so that
1709 * no one could find this inpcb from the inpcb list.
1713 if (inp->inp_flags & INP_DIRECT_DETACH) {
1715 * Direct detaching is allowed
1717 KASSERT((inp->inp_flags & INP_WILDCARD) == 0,
1718 ("in the wildcardhash"));
1719 KASSERT(inp->inp_moptions == NULL, ("has mcast options"));
1725 * Go through netisrs which process UDP to make sure
1726 * no one could find this inpcb anymore.
1728 clomsg = &so->so_clomsg;
1729 netmsg_init(clomsg, so, &netisr_apanic_rport, MSGF_IGNSOPORT,
1730 udp_detach_oncpu_dispatch);
1731 lwkt_sendmsg(netisr_cpuport(0), &clomsg->lmsg);
1735 udp_disconnect(netmsg_t msg)
1737 struct socket *so = msg->disconnect.base.nm_so;
1739 boolean_t forwarded;
1747 if (inp->inp_faddr.s_addr == INADDR_ANY) {
1752 soclrstate(so, SS_ISCONNECTED); /* XXX */
1754 in_pcbdisconnect(inp);
1757 * Follow traditional BSD behavior and retain the local port
1758 * binding. But, fix the old misbehavior of overwriting any
1759 * previously bound local address.
1761 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
1762 inp->inp_laddr.s_addr = INADDR_ANY;
1764 if (so->so_state & SS_ISCLOSING) {
1766 * If this socket is being closed, there is no need
1767 * to put this socket back into wildcard hash table.
1773 forwarded = udp_inswildcardhash(inp, &msg->disconnect.base, 0);
1776 * The message is further forwarded, so we are done
1782 lwkt_replymsg(&msg->disconnect.base.lmsg, error);
1786 udp_shutdown(netmsg_t msg)
1788 struct socket *so = msg->shutdown.base.nm_so;
1799 lwkt_replymsg(&msg->shutdown.base.lmsg, error);
1802 struct pr_usrreqs udp_usrreqs = {
1803 .pru_abort = udp_abort,
1804 .pru_accept = pr_generic_notsupp,
1805 .pru_attach = udp_attach,
1806 .pru_bind = udp_bind,
1807 .pru_connect = udp_connect,
1808 .pru_connect2 = pr_generic_notsupp,
1809 .pru_control = in_control_dispatch,
1810 .pru_detach = udp_detach,
1811 .pru_disconnect = udp_disconnect,
1812 .pru_listen = pr_generic_notsupp,
1813 .pru_peeraddr = in_setpeeraddr_dispatch,
1814 .pru_rcvd = pr_generic_notsupp,
1815 .pru_rcvoob = pr_generic_notsupp,
1816 .pru_send = udp_send,
1817 .pru_sense = pru_sense_null,
1818 .pru_shutdown = udp_shutdown,
1819 .pru_sockaddr = in_setsockaddr_dispatch,
1820 .pru_sosend = sosendudp,
1821 .pru_soreceive = soreceive