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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 1.12 2004/03/05 16:57:15 hsu 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>
53 #include <sys/in_cksum.h>
55 #include <vm/vm_zone.h>
58 #include <net/route.h>
60 #include <netinet/in.h>
61 #include <netinet/in_systm.h>
62 #include <netinet/ip.h>
64 #include <netinet/ip6.h>
66 #include <netinet/in_pcb.h>
67 #include <netinet/in_var.h>
68 #include <netinet/ip_var.h>
70 #include <netinet6/ip6_var.h>
72 #include <netinet/ip_icmp.h>
73 #include <netinet/icmp_var.h>
74 #include <netinet/udp.h>
75 #include <netinet/udp_var.h>
78 #include <netipsec/ipsec.h>
82 #include <netinet6/ipsec.h>
86 * UDP protocol implementation.
87 * Per RFC 768, August, 1980.
90 static int udpcksum = 1;
92 static int udpcksum = 0; /* XXX */
94 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
98 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
99 &log_in_vain, 0, "Log all incoming UDP packets");
101 static int blackhole = 0;
102 SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
103 &blackhole, 0, "Do not send port unreachables for refused connects");
105 static int strict_mcast_mship = 1;
106 SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW,
107 &strict_mcast_mship, 0, "Only send multicast to member sockets");
109 struct inpcbhead udb; /* from udp_var.h */
110 #define udb6 udb /* for KAME src sync over BSD*'s */
111 struct inpcbinfo udbinfo;
114 #define UDBHASHSIZE 16
117 struct udpstat udpstat; /* from udp_var.h */
118 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW,
119 &udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
121 static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
124 struct sockaddr_in6 uin6_sin;
125 u_char uin6_init_done : 1;
127 { sizeof(udp_in6.uin6_sin), AF_INET6 },
131 struct ip6_hdr uip6_ip6;
132 u_char uip6_init_done : 1;
136 static void udp_append (struct inpcb *last, struct ip *ip,
137 struct mbuf *n, int off);
139 static void ip_2_ip6_hdr (struct ip6_hdr *ip6, struct ip *ip);
142 static int udp_detach (struct socket *so);
143 static int udp_output (struct inpcb *, struct mbuf *, struct sockaddr *,
144 struct mbuf *, struct thread *);
150 udbinfo.listhead = &udb;
151 udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
152 udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB,
153 &udbinfo.porthashmask);
154 udbinfo.bindhashbase = hashinit(UDBHASHSIZE, M_PCB,
155 &udbinfo.bindhashmask);
156 udbinfo.ipi_zone = zinit("udpcb", sizeof(struct inpcb), maxsockets,
162 * Check multicast packets to make sure they are only sent to sockets with
163 * multicast memberships for the packet's destination address and arrival
164 * interface. Multicast packets to multicast-unaware sockets are also
167 * Returns 0 if the packet is acceptable, -1 if it is not.
171 check_multicast_membership(struct ip *ip, struct inpcb *inp, struct mbuf *m)
174 struct ip_moptions *mopt;
176 if (strict_mcast_mship == 0 ||
177 !IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
180 mopt = inp->inp_moptions;
183 for (mshipno = 0; mshipno <= mopt->imo_num_memberships; ++mshipno) {
184 if (ip->ip_dst.s_addr == mopt->imo_membership[mshipno]->inm_addr.s_addr &&
185 m->m_pkthdr.rcvif == mopt->imo_membership[mshipno]->inm_ifp) {
193 udp_input(m, off, proto)
201 struct mbuf *opts = 0;
204 struct sockaddr *append_sa;
206 udpstat.udps_ipackets++;
209 * Strip IP options, if any; should skip this,
210 * make available to user, and use on returned packets,
211 * but we don't yet have a way to check the checksum
212 * with options still present.
214 if (iphlen > sizeof (struct ip)) {
215 ip_stripoptions(m, (struct mbuf *)0);
216 iphlen = sizeof(struct ip);
220 * Get IP and UDP header together in first mbuf.
222 ip = mtod(m, struct ip *);
223 if (m->m_len < iphlen + sizeof(struct udphdr)) {
224 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
225 udpstat.udps_hdrops++;
228 ip = mtod(m, struct ip *);
230 uh = (struct udphdr *)((caddr_t)ip + iphlen);
232 /* destination port of 0 is illegal, based on RFC768. */
233 if (uh->uh_dport == 0)
237 * Make mbuf data length reflect UDP length.
238 * If not enough data to reflect UDP length, drop.
240 len = ntohs((u_short)uh->uh_ulen);
241 if (ip->ip_len != len) {
242 if (len > ip->ip_len || len < sizeof(struct udphdr)) {
243 udpstat.udps_badlen++;
246 m_adj(m, len - ip->ip_len);
247 /* ip->ip_len = len; */
250 * Save a copy of the IP header in case we want restore it
251 * for sending an ICMP error message in response.
256 * Checksum extended UDP header and data.
259 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
260 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
261 uh->uh_sum = m->m_pkthdr.csum_data;
263 uh->uh_sum = in_pseudo(ip->ip_src.s_addr,
264 ip->ip_dst.s_addr, htonl((u_short)len +
265 m->m_pkthdr.csum_data + IPPROTO_UDP));
266 uh->uh_sum ^= 0xffff;
269 bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
270 bzero(((struct ipovly *)ip)->ih_x1, 9);
271 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
272 uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
273 bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
276 udpstat.udps_badsum++;
281 udpstat.udps_nosum++;
283 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
284 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
287 * Deliver a multicast or broadcast datagram to *all* sockets
288 * for which the local and remote addresses and ports match
289 * those of the incoming datagram. This allows more than
290 * one process to receive multi/broadcasts on the same port.
291 * (This really ought to be done for unicast datagrams as
292 * well, but that would cause problems with existing
293 * applications that open both address-specific sockets and
294 * a wildcard socket listening to the same port -- they would
295 * end up receiving duplicates of every unicast datagram.
296 * Those applications open the multiple sockets to overcome an
297 * inadequacy of the UDP socket interface, but for backwards
298 * compatibility we avoid the problem here rather than
299 * fixing the interface. Maybe 4.5BSD will remedy this?)
303 * Construct sockaddr format source address.
305 udp_in.sin_port = uh->uh_sport;
306 udp_in.sin_addr = ip->ip_src;
308 * Locate pcb(s) for datagram.
309 * (Algorithm copied from raw_intr().)
313 udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0;
315 LIST_FOREACH(inp, &udb, inp_list) {
317 if ((inp->inp_vflag & INP_IPV4) == 0)
320 if (inp->inp_lport != uh->uh_dport)
322 if (inp->inp_laddr.s_addr != INADDR_ANY) {
323 if (inp->inp_laddr.s_addr !=
327 if (inp->inp_faddr.s_addr != INADDR_ANY) {
328 if (inp->inp_faddr.s_addr !=
330 inp->inp_fport != uh->uh_sport)
334 if (check_multicast_membership(ip, inp, m) < 0)
341 /* check AH/ESP integrity. */
342 if (ipsec4_in_reject_so(m, last->inp_socket))
343 ipsecstat.in_polvio++;
344 /* do not inject data to pcb */
348 /* check AH/ESP integrity. */
349 if (ipsec4_in_reject(m, last))
352 #endif /*FAST_IPSEC*/
353 if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
354 udp_append(last, ip, n,
356 sizeof(struct udphdr));
360 * Don't look for additional matches if this one does
361 * not have either the SO_REUSEPORT or SO_REUSEADDR
362 * socket options set. This heuristic avoids searching
363 * through all pcbs in the common case of a non-shared
364 * port. It * assumes that an application will never
365 * clear these options after setting them.
367 if ((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0)
373 * No matching pcb found; discard datagram.
374 * (No need to send an ICMP Port Unreachable
375 * for a broadcast or multicast datgram.)
377 udpstat.udps_noportbcast++;
381 /* check AH/ESP integrity. */
382 if (ipsec4_in_reject_so(m, last->inp_socket)) {
383 ipsecstat.in_polvio++;
388 /* check AH/ESP integrity. */
389 if (ipsec4_in_reject(m, last))
391 #endif /*FAST_IPSEC*/
392 udp_append(last, ip, m, iphlen + sizeof(struct udphdr));
396 * Locate pcb for datagram.
398 inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport,
399 ip->ip_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif);
402 char buf[4*sizeof "123"];
404 strcpy(buf, inet_ntoa(ip->ip_dst));
406 "Connection attempt to UDP %s:%d from %s:%d\n",
407 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
408 ntohs(uh->uh_sport));
410 udpstat.udps_noport++;
411 if (m->m_flags & (M_BCAST | M_MCAST)) {
412 udpstat.udps_noportbcast++;
418 if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
422 ip->ip_len += iphlen;
423 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
427 if (ipsec4_in_reject_so(m, inp->inp_socket)) {
428 ipsecstat.in_polvio++;
433 if (ipsec4_in_reject(m, inp))
435 #endif /*FAST_IPSEC*/
438 * Construct sockaddr format source address.
439 * Stuff source address and datagram in user buffer.
441 udp_in.sin_port = uh->uh_sport;
442 udp_in.sin_addr = ip->ip_src;
443 if (inp->inp_flags & INP_CONTROLOPTS
444 || inp->inp_socket->so_options & SO_TIMESTAMP) {
446 if (inp->inp_vflag & INP_IPV6) {
449 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
450 savedflags = inp->inp_flags;
451 inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
452 ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m);
453 inp->inp_flags = savedflags;
456 ip_savecontrol(inp, &opts, ip, m);
458 m_adj(m, iphlen + sizeof(struct udphdr));
460 if (inp->inp_vflag & INP_IPV6) {
461 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
462 append_sa = (struct sockaddr *)&udp_in6;
465 append_sa = (struct sockaddr *)&udp_in;
466 if (sbappendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) {
467 udpstat.udps_fullsock++;
470 sorwakeup(inp->inp_socket);
481 ip_2_ip6_hdr(ip6, ip)
485 bzero(ip6, sizeof(*ip6));
487 ip6->ip6_vfc = IPV6_VERSION;
488 ip6->ip6_plen = ip->ip_len;
489 ip6->ip6_nxt = ip->ip_p;
490 ip6->ip6_hlim = ip->ip_ttl;
491 ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] =
493 ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr;
494 ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr;
499 * subroutine of udp_input(), mainly for source code readability.
500 * caller must properly init udp_ip6 and udp_in6 beforehand.
503 udp_append(last, ip, n, off)
509 struct sockaddr *append_sa;
510 struct mbuf *opts = 0;
512 if (last->inp_flags & INP_CONTROLOPTS ||
513 last->inp_socket->so_options & SO_TIMESTAMP) {
515 if (last->inp_vflag & INP_IPV6) {
518 if (udp_ip6.uip6_init_done == 0) {
519 ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
520 udp_ip6.uip6_init_done = 1;
522 savedflags = last->inp_flags;
523 last->inp_flags &= ~INP_UNMAPPABLEOPTS;
524 ip6_savecontrol(last, &opts, &udp_ip6.uip6_ip6, n);
525 last->inp_flags = savedflags;
528 ip_savecontrol(last, &opts, ip, n);
531 if (last->inp_vflag & INP_IPV6) {
532 if (udp_in6.uin6_init_done == 0) {
533 in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
534 udp_in6.uin6_init_done = 1;
536 append_sa = (struct sockaddr *)&udp_in6.uin6_sin;
539 append_sa = (struct sockaddr *)&udp_in;
541 if (sbappendaddr(&last->inp_socket->so_rcv, append_sa, n, opts) == 0) {
545 udpstat.udps_fullsock++;
547 sorwakeup(last->inp_socket);
551 * Notify a udp user of an asynchronous error;
552 * just wake up so that he can collect error status.
555 udp_notify(inp, errno)
559 inp->inp_socket->so_error = errno;
560 sorwakeup(inp->inp_socket);
561 sowwakeup(inp->inp_socket);
565 udp_ctlinput(cmd, sa, vip)
572 void (*notify) (struct inpcb *, int) = udp_notify;
573 struct in_addr faddr;
577 faddr = ((struct sockaddr_in *)sa)->sin_addr;
578 if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
581 if (PRC_IS_REDIRECT(cmd)) {
583 notify = in_rtchange;
584 } else if (cmd == PRC_HOSTDEAD)
586 else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
590 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
591 inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport,
592 ip->ip_src, uh->uh_sport, 0, NULL);
593 if (inp != NULL && inp->inp_socket != NULL)
594 (*notify)(inp, inetctlerrmap[cmd]);
597 in_pcbnotifyall(&udb, faddr, inetctlerrmap[cmd], notify);
601 udp_pcblist(SYSCTL_HANDLER_ARGS)
604 struct inpcb *inp, **inp_list;
609 * The process of preparing the TCB list is too time-consuming and
610 * resource-intensive to repeat twice on every request.
612 if (req->oldptr == 0) {
613 n = udbinfo.ipi_count;
614 req->oldidx = 2 * (sizeof xig)
615 + (n + n/8) * sizeof(struct xinpcb);
619 if (req->newptr != 0)
623 * OK, now we're committed to doing something.
626 gencnt = udbinfo.ipi_gencnt;
627 n = udbinfo.ipi_count;
630 xig.xig_len = sizeof xig;
632 xig.xig_gen = gencnt;
633 xig.xig_sogen = so_gencnt;
634 error = SYSCTL_OUT(req, &xig, sizeof xig);
638 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
643 for (inp = LIST_FIRST(udbinfo.listhead), i = 0; inp && i < n;
644 inp = LIST_NEXT(inp, inp_list)) {
645 if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->td, inp))
652 for (i = 0; i < n; i++) {
654 if (inp->inp_gencnt <= gencnt) {
656 xi.xi_len = sizeof xi;
657 /* XXX should avoid extra copy */
658 bcopy(inp, &xi.xi_inp, sizeof *inp);
660 sotoxsocket(inp->inp_socket, &xi.xi_socket);
661 error = SYSCTL_OUT(req, &xi, sizeof xi);
666 * Give the user an updated idea of our state.
667 * If the generation differs from what we told
668 * her before, she knows that something happened
669 * while we were processing this request, and it
670 * might be necessary to retry.
673 xig.xig_gen = udbinfo.ipi_gencnt;
674 xig.xig_sogen = so_gencnt;
675 xig.xig_count = udbinfo.ipi_count;
677 error = SYSCTL_OUT(req, &xig, sizeof xig);
679 free(inp_list, M_TEMP);
683 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
684 udp_pcblist, "S,xinpcb", "List of active UDP sockets");
687 udp_getcred(SYSCTL_HANDLER_ARGS)
689 struct sockaddr_in addrs[2];
693 error = suser(req->td);
696 error = SYSCTL_IN(req, addrs, sizeof(addrs));
700 inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
701 addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
702 if (inp == NULL || inp->inp_socket == NULL) {
706 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, sizeof(struct ucred));
712 SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
713 0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
716 udp_output(inp, m, addr, control, td)
719 struct sockaddr *addr;
720 struct mbuf *control;
724 int len = m->m_pkthdr.len;
725 struct in_addr laddr;
726 struct sockaddr_in *sin;
727 int s = 0, error = 0;
730 m_freem(control); /* XXX */
732 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
738 sin = (struct sockaddr_in *)addr;
739 prison_remote_ip(td, 0, &sin->sin_addr.s_addr);
740 laddr = inp->inp_laddr;
741 if (inp->inp_faddr.s_addr != INADDR_ANY) {
746 * Must block input while temporarily connected.
749 error = in_pcbconnect(inp, addr, td);
755 if (inp->inp_faddr.s_addr == INADDR_ANY) {
761 * Calculate data length and get a mbuf
762 * for UDP and IP headers.
764 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
773 * Fill in mbuf with extended UDP header
774 * and addresses and length put into network format.
776 ui = mtod(m, struct udpiphdr *);
777 bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
778 ui->ui_pr = IPPROTO_UDP;
779 ui->ui_src = inp->inp_laddr;
780 ui->ui_dst = inp->inp_faddr;
781 ui->ui_sport = inp->inp_lport;
782 ui->ui_dport = inp->inp_fport;
783 ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
786 * Set up checksum and output datagram.
789 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
790 htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
791 m->m_pkthdr.csum_flags = CSUM_UDP;
792 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
796 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
797 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
798 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
799 udpstat.udps_opackets++;
801 error = ip_output(m, inp->inp_options, &inp->inp_route,
802 (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)),
803 inp->inp_moptions, inp);
806 in_pcbdisconnect(inp);
807 inp->inp_laddr = laddr;
808 in_pcbinsbindhash(inp);
818 u_long udp_sendspace = 9216; /* really max datagram size */
819 /* 40 1K datagrams */
820 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
821 &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
823 u_long udp_recvspace = 40 * (1024 +
825 sizeof(struct sockaddr_in6)
827 sizeof(struct sockaddr_in)
830 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
831 &udp_recvspace, 0, "Maximum incoming UDP datagram size");
834 udp_abort(struct socket *so)
841 return EINVAL; /* ??? possible? panic instead? */
842 soisdisconnected(so);
850 udp_attach(struct socket *so, int proto, struct pru_attach_info *ai)
859 error = soreserve(so, udp_sendspace, udp_recvspace, ai->sb_rlimit);
863 error = in_pcballoc(so, &udbinfo);
868 inp = (struct inpcb *)so->so_pcb;
869 inp->inp_vflag |= INP_IPV4;
870 inp->inp_ip_ttl = ip_defttl;
875 udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
884 error = in_pcbbind(inp, nam, td);
890 udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
894 struct sockaddr_in *sin;
899 if (inp->inp_faddr.s_addr != INADDR_ANY)
903 if (inp->inp_laddr.s_addr == INADDR_ANY &&
905 td->td_proc->p_ucred->cr_prison != NULL) {
906 error = in_pcbbind(inp, NULL, td);
909 sin = (struct sockaddr_in *)nam;
910 prison_remote_ip(td, 0, &sin->sin_addr.s_addr);
911 error = in_pcbconnect(inp, nam, td);
920 udp_detach(struct socket *so)
935 udp_disconnect(struct socket *so)
943 if (inp->inp_faddr.s_addr == INADDR_ANY)
947 in_pcbdisconnect(inp);
948 inp->inp_laddr.s_addr = INADDR_ANY;
949 in_pcbinsbindhash(inp);
951 so->so_state &= ~SS_ISCONNECTED; /* XXX */
956 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
957 struct mbuf *control, struct thread *td)
966 return udp_output(inp, m, addr, control, td);
970 udp_shutdown(struct socket *so)
981 struct pr_usrreqs udp_usrreqs = {
982 udp_abort, pru_accept_notsupp, udp_attach, udp_bind, udp_connect,
983 pru_connect2_notsupp, in_control, udp_detach, udp_disconnect,
984 pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
985 pru_rcvoob_notsupp, udp_send, pru_sense_null, udp_shutdown,
986 in_setsockaddr, sosend, soreceive, sopoll