2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
34 * $FreeBSD: src/sys/netinet/udp_usrreq.c,v 1.64.2.18 2003/01/24 05:11:34 sam Exp $
35 * $DragonFly: src/sys/netinet/udp_usrreq.c,v 1.8 2003/11/08 07:57:51 dillon Exp $
38 #include "opt_ipsec.h"
39 #include "opt_inet6.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
46 #include <sys/domain.h>
48 #include <sys/protosw.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/sysctl.h>
52 #include <sys/syslog.h>
54 #include <vm/vm_zone.h>
57 #include <net/route.h>
59 #include <netinet/in.h>
60 #include <netinet/in_systm.h>
61 #include <netinet/ip.h>
63 #include <netinet/ip6.h>
65 #include <netinet/in_pcb.h>
66 #include <netinet/in_var.h>
67 #include <netinet/ip_var.h>
69 #include <netinet6/ip6_var.h>
71 #include <netinet/ip_icmp.h>
72 #include <netinet/icmp_var.h>
73 #include <netinet/udp.h>
74 #include <netinet/udp_var.h>
77 #include <netipsec/ipsec.h>
81 #include <netinet6/ipsec.h>
84 #include <machine/in_cksum.h>
87 * UDP protocol implementation.
88 * Per RFC 768, August, 1980.
91 static int udpcksum = 1;
93 static int udpcksum = 0; /* XXX */
95 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
99 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
100 &log_in_vain, 0, "Log all incoming UDP packets");
102 static int blackhole = 0;
103 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
104 &blackhole, 0, "Do not send port unreachables for refused connects");
106 static int strict_mcast_mship = 1;
107 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW,
108 &strict_mcast_mship, 0, "Only send multicast to member sockets");
110 struct inpcbhead udb; /* from udp_var.h */
111 #define udb6 udb /* for KAME src sync over BSD*'s */
112 struct inpcbinfo udbinfo;
115 #define UDBHASHSIZE 16
118 struct udpstat udpstat; /* from udp_var.h */
119 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW,
120 &udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
122 static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
125 struct sockaddr_in6 uin6_sin;
126 u_char uin6_init_done : 1;
128 { sizeof(udp_in6.uin6_sin), AF_INET6 },
132 struct ip6_hdr uip6_ip6;
133 u_char uip6_init_done : 1;
137 static void udp_append (struct inpcb *last, struct ip *ip,
138 struct mbuf *n, int off);
140 static void ip_2_ip6_hdr (struct ip6_hdr *ip6, struct ip *ip);
143 static int udp_detach (struct socket *so);
144 static int udp_output (struct inpcb *, struct mbuf *, struct sockaddr *,
145 struct mbuf *, struct thread *);
151 udbinfo.listhead = &udb;
152 udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
153 udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB,
154 &udbinfo.porthashmask);
155 udbinfo.ipi_zone = zinit("udpcb", sizeof(struct inpcb), maxsockets,
161 * Check multicast packets to make sure they are only sent to sockets with
162 * multicast memberships for the packet's destination address and arrival
163 * interface. Multicast packets to multicast-unaware sockets are also
166 * Returns 0 if the packet is acceptable, -1 if it is not.
170 check_multicast_membership(struct ip *ip, struct inpcb *inp, struct mbuf *m)
173 struct ip_moptions *mopt;
175 if (strict_mcast_mship == 0 ||
176 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
179 mopt = inp->inp_moptions;
182 for (mshipno = 0; mshipno <= mopt->imo_num_memberships; ++mshipno) {
183 if (ip->ip_dst.s_addr == mopt->imo_membership[mshipno]->inm_addr.s_addr &&
184 m->m_pkthdr.rcvif == mopt->imo_membership[mshipno]->inm_ifp) {
192 udp_input(m, off, proto)
200 struct mbuf *opts = 0;
203 struct sockaddr *append_sa;
205 udpstat.udps_ipackets++;
208 * Strip IP options, if any; should skip this,
209 * make available to user, and use on returned packets,
210 * but we don't yet have a way to check the checksum
211 * with options still present.
213 if (iphlen > sizeof (struct ip)) {
214 ip_stripoptions(m, (struct mbuf *)0);
215 iphlen = sizeof(struct ip);
219 * Get IP and UDP header together in first mbuf.
221 ip = mtod(m, struct ip *);
222 if (m->m_len < iphlen + sizeof(struct udphdr)) {
223 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
224 udpstat.udps_hdrops++;
227 ip = mtod(m, struct ip *);
229 uh = (struct udphdr *)((caddr_t)ip + iphlen);
231 /* destination port of 0 is illegal, based on RFC768. */
232 if (uh->uh_dport == 0)
236 * Make mbuf data length reflect UDP length.
237 * If not enough data to reflect UDP length, drop.
239 len = ntohs((u_short)uh->uh_ulen);
240 if (ip->ip_len != len) {
241 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
242 udpstat.udps_badlen++;
245 m_adj(m, len - ip->ip_len);
246 /* ip->ip_len = len; */
249 * Save a copy of the IP header in case we want restore it
250 * for sending an ICMP error message in response.
255 * Checksum extended UDP header and data.
258 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
259 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
260 uh->uh_sum = m->m_pkthdr.csum_data;
262 uh->uh_sum = in_pseudo(ip->ip_src.s_addr,
263 ip->ip_dst.s_addr, htonl((u_short)len +
264 m->m_pkthdr.csum_data + IPPROTO_UDP));
265 uh->uh_sum ^= 0xffff;
268 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
269 bzero(((struct ipovly *)ip)->ih_x1, 9);
270 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
271 uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
272 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
275 udpstat.udps_badsum++;
280 udpstat.udps_nosum++;
282 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
283 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
286 * Deliver a multicast or broadcast datagram to *all* sockets
287 * for which the local and remote addresses and ports match
288 * those of the incoming datagram. This allows more than
289 * one process to receive multi/broadcasts on the same port.
290 * (This really ought to be done for unicast datagrams as
291 * well, but that would cause problems with existing
292 * applications that open both address-specific sockets and
293 * a wildcard socket listening to the same port -- they would
294 * end up receiving duplicates of every unicast datagram.
295 * Those applications open the multiple sockets to overcome an
296 * inadequacy of the UDP socket interface, but for backwards
297 * compatibility we avoid the problem here rather than
298 * fixing the interface. Maybe 4.5BSD will remedy this?)
302 * Construct sockaddr format source address.
304 udp_in.sin_port = uh->uh_sport;
305 udp_in.sin_addr = ip->ip_src;
307 * Locate pcb(s) for datagram.
308 * (Algorithm copied from raw_intr().)
312 udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0;
314 LIST_FOREACH(inp, &udb, inp_list) {
316 if ((inp->inp_vflag & INP_IPV4) == 0)
319 if (inp->inp_lport != uh->uh_dport)
321 if (inp->inp_laddr.s_addr != INADDR_ANY) {
322 if (inp->inp_laddr.s_addr !=
326 if (inp->inp_faddr.s_addr != INADDR_ANY) {
327 if (inp->inp_faddr.s_addr !=
329 inp->inp_fport != uh->uh_sport)
333 if (check_multicast_membership(ip, inp, m) < 0)
340 /* check AH/ESP integrity. */
341 if (ipsec4_in_reject_so(m, last->inp_socket))
342 ipsecstat.in_polvio++;
343 /* do not inject data to pcb */
347 /* check AH/ESP integrity. */
348 if (ipsec4_in_reject(m, last))
351 #endif /*FAST_IPSEC*/
352 if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
353 udp_append(last, ip, n,
355 sizeof(struct udphdr));
359 * Don't look for additional matches if this one does
360 * not have either the SO_REUSEPORT or SO_REUSEADDR
361 * socket options set. This heuristic avoids searching
362 * through all pcbs in the common case of a non-shared
363 * port. It * assumes that an application will never
364 * clear these options after setting them.
366 if ((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0)
372 * No matching pcb found; discard datagram.
373 * (No need to send an ICMP Port Unreachable
374 * for a broadcast or multicast datgram.)
376 udpstat.udps_noportbcast++;
380 /* check AH/ESP integrity. */
381 if (ipsec4_in_reject_so(m, last->inp_socket)) {
382 ipsecstat.in_polvio++;
387 /* check AH/ESP integrity. */
388 if (ipsec4_in_reject(m, last))
390 #endif /*FAST_IPSEC*/
391 udp_append(last, ip, m, iphlen + sizeof(struct udphdr));
395 * Locate pcb for datagram.
397 inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport,
398 ip->ip_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif);
401 char buf[4*sizeof "123"];
403 strcpy(buf, inet_ntoa(ip->ip_dst));
405 "Connection attempt to UDP %s:%d from %s:%d\n",
406 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
407 ntohs(uh->uh_sport));
409 udpstat.udps_noport++;
410 if (m->m_flags & (M_BCAST | M_MCAST)) {
411 udpstat.udps_noportbcast++;
417 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
421 ip->ip_len += iphlen;
422 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
426 if (ipsec4_in_reject_so(m, inp->inp_socket)) {
427 ipsecstat.in_polvio++;
432 if (ipsec4_in_reject(m, inp))
434 #endif /*FAST_IPSEC*/
437 * Construct sockaddr format source address.
438 * Stuff source address and datagram in user buffer.
440 udp_in.sin_port = uh->uh_sport;
441 udp_in.sin_addr = ip->ip_src;
442 if (inp->inp_flags & INP_CONTROLOPTS
443 || inp->inp_socket->so_options & SO_TIMESTAMP) {
445 if (inp->inp_vflag & INP_IPV6) {
448 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
449 savedflags = inp->inp_flags;
450 inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
451 ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m);
452 inp->inp_flags = savedflags;
455 ip_savecontrol(inp, &opts, ip, m);
457 m_adj(m, iphlen + sizeof(struct udphdr));
459 if (inp->inp_vflag & INP_IPV6) {
460 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
461 append_sa = (struct sockaddr *)&udp_in6;
464 append_sa = (struct sockaddr *)&udp_in;
465 if (sbappendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) {
466 udpstat.udps_fullsock++;
469 sorwakeup(inp->inp_socket);
480 ip_2_ip6_hdr(ip6, ip)
484 bzero(ip6, sizeof(*ip6));
486 ip6->ip6_vfc = IPV6_VERSION;
487 ip6->ip6_plen = ip->ip_len;
488 ip6->ip6_nxt = ip->ip_p;
489 ip6->ip6_hlim = ip->ip_ttl;
490 ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] =
492 ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr;
493 ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr;
498 * subroutine of udp_input(), mainly for source code readability.
499 * caller must properly init udp_ip6 and udp_in6 beforehand.
502 udp_append(last, ip, n, off)
508 struct sockaddr *append_sa;
509 struct mbuf *opts = 0;
511 if (last->inp_flags & INP_CONTROLOPTS ||
512 last->inp_socket->so_options & SO_TIMESTAMP) {
514 if (last->inp_vflag & INP_IPV6) {
517 if (udp_ip6.uip6_init_done == 0) {
518 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
519 udp_ip6.uip6_init_done = 1;
521 savedflags = last->inp_flags;
522 last->inp_flags &= ~INP_UNMAPPABLEOPTS;
523 ip6_savecontrol(last, &opts, &udp_ip6.uip6_ip6, n);
524 last->inp_flags = savedflags;
527 ip_savecontrol(last, &opts, ip, n);
530 if (last->inp_vflag & INP_IPV6) {
531 if (udp_in6.uin6_init_done == 0) {
532 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
533 udp_in6.uin6_init_done = 1;
535 append_sa = (struct sockaddr *)&udp_in6.uin6_sin;
538 append_sa = (struct sockaddr *)&udp_in;
540 if (sbappendaddr(&last->inp_socket->so_rcv, append_sa, n, opts) == 0) {
544 udpstat.udps_fullsock++;
546 sorwakeup(last->inp_socket);
550 * Notify a udp user of an asynchronous error;
551 * just wake up so that he can collect error status.
554 udp_notify(inp, errno)
558 inp->inp_socket->so_error = errno;
559 sorwakeup(inp->inp_socket);
560 sowwakeup(inp->inp_socket);
564 udp_ctlinput(cmd, sa, vip)
571 void (*notify) (struct inpcb *, int) = udp_notify;
572 struct in_addr faddr;
576 faddr = ((struct sockaddr_in *)sa)->sin_addr;
577 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
580 if (PRC_IS_REDIRECT(cmd)) {
582 notify = in_rtchange;
583 } else if (cmd == PRC_HOSTDEAD)
585 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
589 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
590 inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport,
591 ip->ip_src, uh->uh_sport, 0, NULL);
592 if (inp != NULL && inp->inp_socket != NULL)
593 (*notify)(inp, inetctlerrmap[cmd]);
596 in_pcbnotifyall(&udb, faddr, inetctlerrmap[cmd], notify);
600 udp_pcblist(SYSCTL_HANDLER_ARGS)
603 struct inpcb *inp, **inp_list;
608 * The process of preparing the TCB list is too time-consuming and
609 * resource-intensive to repeat twice on every request.
611 if (req->oldptr == 0) {
612 n = udbinfo.ipi_count;
613 req->oldidx = 2 * (sizeof xig)
614 + (n + n/8) * sizeof(struct xinpcb);
618 if (req->newptr != 0)
622 * OK, now we're committed to doing something.
625 gencnt = udbinfo.ipi_gencnt;
626 n = udbinfo.ipi_count;
629 xig.xig_len = sizeof xig;
631 xig.xig_gen = gencnt;
632 xig.xig_sogen = so_gencnt;
633 error = SYSCTL_OUT(req, &xig, sizeof xig);
637 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
642 for (inp = LIST_FIRST(udbinfo.listhead), i = 0; inp && i < n;
643 inp = LIST_NEXT(inp, inp_list)) {
644 if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->td, inp))
651 for (i = 0; i < n; i++) {
653 if (inp->inp_gencnt <= gencnt) {
655 xi.xi_len = sizeof xi;
656 /* XXX should avoid extra copy */
657 bcopy(inp, &xi.xi_inp, sizeof *inp);
659 sotoxsocket(inp->inp_socket, &xi.xi_socket);
660 error = SYSCTL_OUT(req, &xi, sizeof xi);
665 * Give the user an updated idea of our state.
666 * If the generation differs from what we told
667 * her before, she knows that something happened
668 * while we were processing this request, and it
669 * might be necessary to retry.
672 xig.xig_gen = udbinfo.ipi_gencnt;
673 xig.xig_sogen = so_gencnt;
674 xig.xig_count = udbinfo.ipi_count;
676 error = SYSCTL_OUT(req, &xig, sizeof xig);
678 free(inp_list, M_TEMP);
682 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
683 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
686 udp_getcred(SYSCTL_HANDLER_ARGS)
688 struct sockaddr_in addrs[2];
692 error = suser(req->td);
695 error = SYSCTL_IN(req, addrs, sizeof(addrs));
699 inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
700 addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
701 if (inp == NULL || inp->inp_socket == NULL) {
705 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, sizeof(struct ucred));
711 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
712 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
715 udp_output(inp, m, addr, control, td)
718 struct sockaddr *addr;
719 struct mbuf *control;
723 int len = m->m_pkthdr.len;
724 struct in_addr laddr;
725 struct sockaddr_in *sin;
726 int s = 0, error = 0;
729 m_freem(control); /* XXX */
731 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
737 sin = (struct sockaddr_in *)addr;
738 prison_remote_ip(td, 0, &sin->sin_addr.s_addr);
739 laddr = inp->inp_laddr;
740 if (inp->inp_faddr.s_addr != INADDR_ANY) {
745 * Must block input while temporarily connected.
748 error = in_pcbconnect(inp, addr, td);
754 if (inp->inp_faddr.s_addr == INADDR_ANY) {
760 * Calculate data length and get a mbuf
761 * for UDP and IP headers.
763 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
772 * Fill in mbuf with extended UDP header
773 * and addresses and length put into network format.
775 ui = mtod(m, struct udpiphdr *);
776 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
777 ui->ui_pr = IPPROTO_UDP;
778 ui->ui_src = inp->inp_laddr;
779 ui->ui_dst = inp->inp_faddr;
780 ui->ui_sport = inp->inp_lport;
781 ui->ui_dport = inp->inp_fport;
782 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
785 * Set up checksum and output datagram.
788 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
789 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
790 m->m_pkthdr.csum_flags = CSUM_UDP;
791 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
795 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
796 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
797 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
798 udpstat.udps_opackets++;
800 error = ip_output(m, inp->inp_options, &inp->inp_route,
801 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)),
802 inp->inp_moptions, inp);
805 in_pcbdisconnect(inp);
806 inp->inp_laddr = laddr; /* XXX rehash? */
816 u_long udp_sendspace = 9216; /* really max datagram size */
817 /* 40 1K datagrams */
818 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
819 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
821 u_long udp_recvspace = 40 * (1024 +
823 sizeof(struct sockaddr_in6)
825 sizeof(struct sockaddr_in)
828 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
829 &udp_recvspace, 0, "Maximum incoming UDP datagram size");
832 udp_abort(struct socket *so)
839 return EINVAL; /* ??? possible? panic instead? */
840 soisdisconnected(so);
848 udp_attach(struct socket *so, int proto, struct thread *td)
857 error = soreserve(so, udp_sendspace, udp_recvspace);
861 error = in_pcballoc(so, &udbinfo, td);
866 inp = (struct inpcb *)so->so_pcb;
867 inp->inp_vflag |= INP_IPV4;
868 inp->inp_ip_ttl = ip_defttl;
873 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
882 error = in_pcbbind(inp, nam, td);
888 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
892 struct sockaddr_in *sin;
897 if (inp->inp_faddr.s_addr != INADDR_ANY)
901 if (inp->inp_laddr.s_addr == INADDR_ANY &&
903 td->td_proc->p_ucred->cr_prison != NULL) {
904 error = in_pcbbind(inp, NULL, td);
907 sin = (struct sockaddr_in *)nam;
908 prison_remote_ip(td, 0, &sin->sin_addr.s_addr);
909 error = in_pcbconnect(inp, nam, td);
918 udp_detach(struct socket *so)
933 udp_disconnect(struct socket *so)
941 if (inp->inp_faddr.s_addr == INADDR_ANY)
945 in_pcbdisconnect(inp);
946 inp->inp_laddr.s_addr = INADDR_ANY;
948 so->so_state &= ~SS_ISCONNECTED; /* XXX */
953 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
954 struct mbuf *control, struct thread *td)
963 return udp_output(inp, m, addr, control, td);
967 udp_shutdown(struct socket *so)
978 struct pr_usrreqs udp_usrreqs = {
979 udp_abort, pru_accept_notsupp, udp_attach, udp_bind, udp_connect,
980 pru_connect2_notsupp, in_control, udp_detach, udp_disconnect,
981 pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
982 pru_rcvoob_notsupp, udp_send, pru_sense_null, udp_shutdown,
983 in_setsockaddr, sosend, soreceive, sopoll