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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
- * Copyright (c) 2010-2011 Juniper Networks, Inc.
- * Copyright (c) 2014 Kevin Lo
- * All rights reserved.
- *
- * Portions of this software were developed by Robert N. M. Watson under
- * contract to Juniper Networks, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the project nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $
- * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $
- */
- /*-
- * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
- * The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include "opt_inet.h"
- #include "opt_inet6.h"
- #include "opt_ipsec.h"
- #include "opt_route.h"
- #include "opt_rss.h"
- #include <sys/param.h>
- #include <sys/jail.h>
- #include <sys/kernel.h>
- #include <sys/lock.h>
- #include <sys/mbuf.h>
- #include <sys/priv.h>
- #include <sys/proc.h>
- #include <sys/protosw.h>
- #include <sys/sdt.h>
- #include <sys/signalvar.h>
- #include <sys/socket.h>
- #include <sys/socketvar.h>
- #include <sys/sx.h>
- #include <sys/sysctl.h>
- #include <sys/syslog.h>
- #include <sys/systm.h>
- #include <net/if.h>
- #include <net/if_var.h>
- #include <net/if_types.h>
- #include <net/route.h>
- #include <net/rss_config.h>
- #include <netinet/in.h>
- #include <netinet/in_kdtrace.h>
- #include <netinet/in_pcb.h>
- #include <netinet/in_systm.h>
- #include <netinet/in_var.h>
- #include <netinet/ip.h>
- #include <netinet/ip6.h>
- #include <netinet/icmp6.h>
- #include <netinet/ip_var.h>
- #include <netinet/udp.h>
- #include <netinet/udp_var.h>
- #include <netinet/udplite.h>
- #include <netinet6/ip6protosw.h>
- #include <netinet6/ip6_var.h>
- #include <netinet6/in6_fib.h>
- #include <netinet6/in6_pcb.h>
- #include <netinet6/in6_rss.h>
- #include <netinet6/udp6_var.h>
- #include <netinet6/scope6_var.h>
- #include <netipsec/ipsec_support.h>
- #include <security/mac/mac_framework.h>
- VNET_DEFINE(int, zero_checksum_port) = 0;
- #define V_zero_checksum_port VNET(zero_checksum_port)
- SYSCTL_INT(_net_inet6_udp6, OID_AUTO, rfc6935_port, CTLFLAG_VNET | CTLFLAG_RW,
- &VNET_NAME(zero_checksum_port), 0,
- "Zero UDP checksum allowed for traffic to/from this port.");
- /*
- * UDP protocol implementation.
- * Per RFC 768, August, 1980.
- */
- extern struct protosw inetsw[];
- static void udp6_detach(struct socket *so);
- static int
- udp6_append(struct inpcb *inp, struct mbuf *n, int off,
- struct sockaddr_in6 *fromsa)
- {
- struct socket *so;
- struct mbuf *opts = NULL, *tmp_opts;
- struct udpcb *up;
- INP_LOCK_ASSERT(inp);
- /*
- * Engage the tunneling protocol.
- */
- up = intoudpcb(inp);
- if (up->u_tun_func != NULL) {
- in_pcbref(inp);
- INP_RUNLOCK(inp);
- (*up->u_tun_func)(n, off, inp, (struct sockaddr *)&fromsa[0],
- up->u_tun_ctx);
- INP_RLOCK(inp);
- return (in_pcbrele_rlocked(inp));
- }
- #if defined(IPSEC) || defined(IPSEC_SUPPORT)
- /* Check AH/ESP integrity. */
- if (IPSEC_ENABLED(ipv6)) {
- if (IPSEC_CHECK_POLICY(ipv6, n, inp) != 0) {
- m_freem(n);
- return (0);
- }
- }
- #endif /* IPSEC */
- #ifdef MAC
- if (mac_inpcb_check_deliver(inp, n) != 0) {
- m_freem(n);
- return (0);
- }
- #endif
- opts = NULL;
- if (inp->inp_flags & INP_CONTROLOPTS ||
- inp->inp_socket->so_options & SO_TIMESTAMP)
- ip6_savecontrol(inp, n, &opts);
- if ((inp->inp_vflag & INP_IPV6) && (inp->inp_flags2 & INP_ORIGDSTADDR)) {
- tmp_opts = sbcreatecontrol((caddr_t)&fromsa[1],
- sizeof(struct sockaddr_in6), IPV6_ORIGDSTADDR, IPPROTO_IPV6);
- if (tmp_opts) {
- if (opts) {
- tmp_opts->m_next = opts;
- opts = tmp_opts;
- } else
- opts = tmp_opts;
- }
- }
- m_adj(n, off + sizeof(struct udphdr));
- so = inp->inp_socket;
- SOCKBUF_LOCK(&so->so_rcv);
- if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n,
- opts) == 0) {
- SOCKBUF_UNLOCK(&so->so_rcv);
- m_freem(n);
- if (opts)
- m_freem(opts);
- UDPSTAT_INC(udps_fullsock);
- } else
- sorwakeup_locked(so);
- return (0);
- }
- int
- udp6_input(struct mbuf **mp, int *offp, int proto)
- {
- struct mbuf *m = *mp;
- struct ifnet *ifp;
- struct ip6_hdr *ip6;
- struct udphdr *uh;
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- struct udpcb *up;
- int off = *offp;
- int cscov_partial;
- int plen, ulen;
- struct sockaddr_in6 fromsa[2];
- struct m_tag *fwd_tag;
- uint16_t uh_sum;
- uint8_t nxt;
- NET_EPOCH_ASSERT();
- ifp = m->m_pkthdr.rcvif;
- if (m->m_len < off + sizeof(struct udphdr)) {
- m = m_pullup(m, off + sizeof(struct udphdr));
- if (m == NULL) {
- IP6STAT_INC(ip6s_exthdrtoolong);
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- }
- ip6 = mtod(m, struct ip6_hdr *);
- uh = (struct udphdr *)((caddr_t)ip6 + off);
- UDPSTAT_INC(udps_ipackets);
- /*
- * Destination port of 0 is illegal, based on RFC768.
- */
- if (uh->uh_dport == 0)
- goto badunlocked;
- plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
- ulen = ntohs((u_short)uh->uh_ulen);
- nxt = proto;
- cscov_partial = (nxt == IPPROTO_UDPLITE) ? 1 : 0;
- if (nxt == IPPROTO_UDPLITE) {
- /* Zero means checksum over the complete packet. */
- if (ulen == 0)
- ulen = plen;
- if (ulen == plen)
- cscov_partial = 0;
- if ((ulen < sizeof(struct udphdr)) || (ulen > plen)) {
- /* XXX: What is the right UDPLite MIB counter? */
- goto badunlocked;
- }
- if (uh->uh_sum == 0) {
- /* XXX: What is the right UDPLite MIB counter? */
- goto badunlocked;
- }
- } else {
- if ((ulen < sizeof(struct udphdr)) || (plen != ulen)) {
- UDPSTAT_INC(udps_badlen);
- goto badunlocked;
- }
- if (uh->uh_sum == 0) {
- UDPSTAT_INC(udps_nosum);
- /*
- * dport 0 was rejected earlier so this is OK even if
- * zero_checksum_port is 0 (which is its default value).
- */
- if (ntohs(uh->uh_dport) == V_zero_checksum_port)
- goto skip_checksum;
- else
- goto badunlocked;
- }
- }
- if ((m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) &&
- !cscov_partial) {
- if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
- uh_sum = m->m_pkthdr.csum_data;
- else
- uh_sum = in6_cksum_pseudo(ip6, ulen, nxt,
- m->m_pkthdr.csum_data);
- uh_sum ^= 0xffff;
- } else
- uh_sum = in6_cksum_partial(m, nxt, off, plen, ulen);
- if (uh_sum != 0) {
- UDPSTAT_INC(udps_badsum);
- goto badunlocked;
- }
- skip_checksum:
- /*
- * Construct sockaddr format source address.
- */
- init_sin6(&fromsa[0], m, 0);
- fromsa[0].sin6_port = uh->uh_sport;
- init_sin6(&fromsa[1], m, 1);
- fromsa[1].sin6_port = uh->uh_dport;
- pcbinfo = udp_get_inpcbinfo(nxt);
- if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- struct inpcb *last;
- struct inpcbhead *pcblist;
- struct ip6_moptions *imo;
- /*
- * In the event that laddr should be set to the link-local
- * address (this happens in RIPng), the multicast address
- * specified in the received packet will not match laddr. To
- * handle this situation, matching is relaxed if the
- * receiving interface is the same as one specified in the
- * socket and if the destination multicast address matches
- * one of the multicast groups specified in the socket.
- */
- /*
- * KAME note: traditionally we dropped udpiphdr from mbuf
- * here. We need udphdr for IPsec processing so we do that
- * later.
- */
- pcblist = udp_get_pcblist(nxt);
- last = NULL;
- CK_LIST_FOREACH(inp, pcblist, inp_list) {
- if ((inp->inp_vflag & INP_IPV6) == 0)
- continue;
- if (inp->inp_lport != uh->uh_dport)
- continue;
- if (inp->inp_fport != 0 &&
- inp->inp_fport != uh->uh_sport)
- continue;
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
- if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
- &ip6->ip6_dst))
- continue;
- }
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
- &ip6->ip6_src) ||
- inp->inp_fport != uh->uh_sport)
- continue;
- }
- /*
- * XXXRW: Because we weren't holding either the inpcb
- * or the hash lock when we checked for a match
- * before, we should probably recheck now that the
- * inpcb lock is (supposed to be) held.
- */
- /*
- * Handle socket delivery policy for any-source
- * and source-specific multicast. [RFC3678]
- */
- imo = inp->in6p_moptions;
- if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
- struct sockaddr_in6 mcaddr;
- int blocked;
- INP_RLOCK(inp);
- if (__predict_false(inp->inp_flags2 & INP_FREED)) {
- INP_RUNLOCK(inp);
- continue;
- }
- bzero(&mcaddr, sizeof(struct sockaddr_in6));
- mcaddr.sin6_len = sizeof(struct sockaddr_in6);
- mcaddr.sin6_family = AF_INET6;
- mcaddr.sin6_addr = ip6->ip6_dst;
- blocked = im6o_mc_filter(imo, ifp,
- (struct sockaddr *)&mcaddr,
- (struct sockaddr *)&fromsa[0]);
- if (blocked != MCAST_PASS) {
- if (blocked == MCAST_NOTGMEMBER)
- IP6STAT_INC(ip6s_notmember);
- if (blocked == MCAST_NOTSMEMBER ||
- blocked == MCAST_MUTED)
- UDPSTAT_INC(udps_filtermcast);
- INP_RUNLOCK(inp); /* XXX */
- continue;
- }
- INP_RUNLOCK(inp);
- }
- if (last != NULL) {
- struct mbuf *n;
- if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) !=
- NULL) {
- INP_RLOCK(last);
- if (__predict_true(last->inp_flags2 & INP_FREED) == 0) {
- if (nxt == IPPROTO_UDPLITE)
- UDPLITE_PROBE(receive, NULL, last,
- ip6, last, uh);
- else
- UDP_PROBE(receive, NULL, last,
- ip6, last, uh);
- if (udp6_append(last, n, off, fromsa)) {
- /* XXX-BZ do we leak m here? */
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- }
- INP_RUNLOCK(last);
- }
- }
- last = inp;
- /*
- * Don't look for additional matches if this one does
- * not have either the SO_REUSEPORT or SO_REUSEADDR
- * socket options set. This heuristic avoids
- * searching through all pcbs in the common case of a
- * non-shared port. It assumes that an application
- * will never clear these options after setting them.
- */
- if ((last->inp_socket->so_options &
- (SO_REUSEPORT|SO_REUSEPORT_LB|SO_REUSEADDR)) == 0)
- break;
- }
- if (last == NULL) {
- /*
- * No matching pcb found; discard datagram. (No need
- * to send an ICMP Port Unreachable for a broadcast
- * or multicast datgram.)
- */
- UDPSTAT_INC(udps_noport);
- UDPSTAT_INC(udps_noportmcast);
- goto badunlocked;
- }
- INP_RLOCK(last);
- if (__predict_true(last->inp_flags2 & INP_FREED) == 0) {
- if (nxt == IPPROTO_UDPLITE)
- UDPLITE_PROBE(receive, NULL, last, ip6, last, uh);
- else
- UDP_PROBE(receive, NULL, last, ip6, last, uh);
- if (udp6_append(last, m, off, fromsa) == 0)
- INP_RUNLOCK(last);
- } else
- INP_RUNLOCK(last);
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- /*
- * Locate pcb for datagram.
- */
- /*
- * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
- */
- if ((m->m_flags & M_IP6_NEXTHOP) &&
- (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
- struct sockaddr_in6 *next_hop6;
- next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1);
- /*
- * Transparently forwarded. Pretend to be the destination.
- * Already got one like this?
- */
- inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
- uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
- INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
- if (!inp) {
- /*
- * It's new. Try to find the ambushing socket.
- * Because we've rewritten the destination address,
- * any hardware-generated hash is ignored.
- */
- inp = in6_pcblookup(pcbinfo, &ip6->ip6_src,
- uh->uh_sport, &next_hop6->sin6_addr,
- next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
- uh->uh_dport, INPLOOKUP_WILDCARD |
- INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
- }
- /* Remove the tag from the packet. We don't need it anymore. */
- m_tag_delete(m, fwd_tag);
- m->m_flags &= ~M_IP6_NEXTHOP;
- } else
- inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
- uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
- INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
- m->m_pkthdr.rcvif, m);
- if (inp == NULL) {
- if (V_udp_log_in_vain) {
- char ip6bufs[INET6_ADDRSTRLEN];
- char ip6bufd[INET6_ADDRSTRLEN];
- log(LOG_INFO,
- "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
- ip6_sprintf(ip6bufd, &ip6->ip6_dst),
- ntohs(uh->uh_dport),
- ip6_sprintf(ip6bufs, &ip6->ip6_src),
- ntohs(uh->uh_sport));
- }
- if (nxt == IPPROTO_UDPLITE)
- UDPLITE_PROBE(receive, NULL, NULL, ip6, NULL, uh);
- else
- UDP_PROBE(receive, NULL, NULL, ip6, NULL, uh);
- UDPSTAT_INC(udps_noport);
- if (m->m_flags & M_MCAST) {
- printf("UDP6: M_MCAST is set in a unicast packet.\n");
- UDPSTAT_INC(udps_noportmcast);
- goto badunlocked;
- }
- if (V_udp_blackhole)
- goto badunlocked;
- icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- INP_RLOCK_ASSERT(inp);
- up = intoudpcb(inp);
- if (cscov_partial) {
- if (up->u_rxcslen == 0 || up->u_rxcslen > ulen) {
- INP_RUNLOCK(inp);
- m_freem(m);
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- }
- if (nxt == IPPROTO_UDPLITE)
- UDPLITE_PROBE(receive, NULL, inp, ip6, inp, uh);
- else
- UDP_PROBE(receive, NULL, inp, ip6, inp, uh);
- if (udp6_append(inp, m, off, fromsa) == 0)
- INP_RUNLOCK(inp);
- *mp = NULL;
- return (IPPROTO_DONE);
- badunlocked:
- m_freem(m);
- *mp = NULL;
- return (IPPROTO_DONE);
- }
- static void
- udp6_common_ctlinput(int cmd, struct sockaddr *sa, void *d,
- struct inpcbinfo *pcbinfo)
- {
- struct udphdr uh;
- struct ip6_hdr *ip6;
- struct mbuf *m;
- int off = 0;
- struct ip6ctlparam *ip6cp = NULL;
- const struct sockaddr_in6 *sa6_src = NULL;
- void *cmdarg;
- struct inpcb *(*notify)(struct inpcb *, int) = udp_notify;
- struct udp_portonly {
- u_int16_t uh_sport;
- u_int16_t uh_dport;
- } *uhp;
- if (sa->sa_family != AF_INET6 ||
- sa->sa_len != sizeof(struct sockaddr_in6))
- return;
- if ((unsigned)cmd >= PRC_NCMDS)
- return;
- if (PRC_IS_REDIRECT(cmd))
- notify = in6_rtchange, d = NULL;
- else if (cmd == PRC_HOSTDEAD)
- d = NULL;
- else if (inet6ctlerrmap[cmd] == 0)
- return;
- /* if the parameter is from icmp6, decode it. */
- if (d != NULL) {
- ip6cp = (struct ip6ctlparam *)d;
- m = ip6cp->ip6c_m;
- ip6 = ip6cp->ip6c_ip6;
- off = ip6cp->ip6c_off;
- cmdarg = ip6cp->ip6c_cmdarg;
- sa6_src = ip6cp->ip6c_src;
- } else {
- m = NULL;
- ip6 = NULL;
- cmdarg = NULL;
- sa6_src = &sa6_any;
- }
- if (ip6) {
- /*
- * XXX: We assume that when IPV6 is non NULL,
- * M and OFF are valid.
- */
- /* Check if we can safely examine src and dst ports. */
- if (m->m_pkthdr.len < off + sizeof(*uhp))
- return;
- bzero(&uh, sizeof(uh));
- m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
- if (!PRC_IS_REDIRECT(cmd)) {
- /* Check to see if its tunneled */
- struct inpcb *inp;
- inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_dst,
- uh.uh_dport, &ip6->ip6_src, uh.uh_sport,
- INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
- m->m_pkthdr.rcvif, m);
- if (inp != NULL) {
- struct udpcb *up;
-
- up = intoudpcb(inp);
- if (up->u_icmp_func) {
- /* Yes it is. */
- INP_RUNLOCK(inp);
- (*up->u_icmp_func)(cmd, (struct sockaddr *)ip6cp->ip6c_src,
- d, up->u_tun_ctx);
- return;
- } else {
- /* Can't find it. */
- INP_RUNLOCK(inp);
- }
- }
- }
- (void)in6_pcbnotify(pcbinfo, sa, uh.uh_dport,
- (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd,
- cmdarg, notify);
- } else
- (void)in6_pcbnotify(pcbinfo, sa, 0,
- (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
- }
- void
- udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
- {
- return (udp6_common_ctlinput(cmd, sa, d, &V_udbinfo));
- }
- void
- udplite6_ctlinput(int cmd, struct sockaddr *sa, void *d)
- {
- return (udp6_common_ctlinput(cmd, sa, d, &V_ulitecbinfo));
- }
- static int
- udp6_getcred(SYSCTL_HANDLER_ARGS)
- {
- struct xucred xuc;
- struct sockaddr_in6 addrs[2];
- struct epoch_tracker et;
- struct inpcb *inp;
- int error;
- error = priv_check(req->td, PRIV_NETINET_GETCRED);
- if (error)
- return (error);
- if (req->newlen != sizeof(addrs))
- return (EINVAL);
- if (req->oldlen != sizeof(struct xucred))
- return (EINVAL);
- error = SYSCTL_IN(req, addrs, sizeof(addrs));
- if (error)
- return (error);
- if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 ||
- (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) {
- return (error);
- }
- NET_EPOCH_ENTER(et);
- inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr,
- addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port,
- INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
- NET_EPOCH_EXIT(et);
- if (inp != NULL) {
- INP_RLOCK_ASSERT(inp);
- if (inp->inp_socket == NULL)
- error = ENOENT;
- if (error == 0)
- error = cr_canseesocket(req->td->td_ucred,
- inp->inp_socket);
- if (error == 0)
- cru2x(inp->inp_cred, &xuc);
- INP_RUNLOCK(inp);
- } else
- error = ENOENT;
- if (error == 0)
- error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
- return (error);
- }
- SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred,
- CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE,
- 0, 0, udp6_getcred, "S,xucred",
- "Get the xucred of a UDP6 connection");
- static int
- udp6_output(struct socket *so, int flags_arg, struct mbuf *m,
- struct sockaddr *addr6, struct mbuf *control, struct thread *td)
- {
- struct inpcb *inp;
- struct ip6_hdr *ip6;
- struct udphdr *udp6;
- struct in6_addr *laddr, *faddr, in6a;
- struct ip6_pktopts *optp, opt;
- struct sockaddr_in6 *sin6, tmp;
- struct epoch_tracker et;
- int cscov_partial, error, flags, hlen, scope_ambiguous;
- u_int32_t ulen, plen;
- uint16_t cscov;
- u_short fport;
- uint8_t nxt;
- /* addr6 has been validated in udp6_send(). */
- sin6 = (struct sockaddr_in6 *)addr6;
- /*
- * In contrast to to IPv4 we do not validate the max. packet length
- * here due to IPv6 Jumbograms (RFC2675).
- */
- scope_ambiguous = 0;
- if (sin6) {
- /* Protect *addr6 from overwrites. */
- tmp = *sin6;
- sin6 = &tmp;
- /*
- * Application should provide a proper zone ID or the use of
- * default zone IDs should be enabled. Unfortunately, some
- * applications do not behave as it should, so we need a
- * workaround. Even if an appropriate ID is not determined,
- * we'll see if we can determine the outgoing interface. If we
- * can, determine the zone ID based on the interface below.
- */
- if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
- scope_ambiguous = 1;
- if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) {
- if (control)
- m_freem(control);
- m_freem(m);
- return (error);
- }
- }
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("%s: inp == NULL", __func__));
- /*
- * In the following cases we want a write lock on the inp for either
- * local operations or for possible route cache updates in the IPv6
- * output path:
- * - on connected sockets (sin6 is NULL) for route cache updates,
- * - when we are not bound to an address and source port (it is
- * in6_pcbsetport() which will require the write lock).
- *
- * We check the inp fields before actually locking the inp, so
- * here exists a race, and we may WLOCK the inp and end with already
- * bound one by other thread. This is fine.
- */
- if (sin6 == NULL || (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
- inp->inp_lport == 0))
- INP_WLOCK(inp);
- else
- INP_RLOCK(inp);
- nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ?
- IPPROTO_UDP : IPPROTO_UDPLITE;
- #ifdef INET
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
- int hasv4addr;
- if (sin6 == NULL)
- hasv4addr = (inp->inp_vflag & INP_IPV4);
- else
- hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
- ? 1 : 0;
- if (hasv4addr) {
- struct pr_usrreqs *pru;
- /*
- * XXXRW: We release UDP-layer locks before calling
- * udp_send() in order to avoid recursion. However,
- * this does mean there is a short window where inp's
- * fields are unstable. Could this lead to a
- * potential race in which the factors causing us to
- * select the UDPv4 output routine are invalidated?
- */
- INP_UNLOCK(inp);
- if (sin6)
- in6_sin6_2_sin_in_sock((struct sockaddr *)sin6);
- pru = inetsw[ip_protox[nxt]].pr_usrreqs;
- /* addr will just be freed in sendit(). */
- return ((*pru->pru_send)(so, flags_arg | PRUS_IPV6, m,
- (struct sockaddr *)sin6, control, td));
- }
- } else
- #endif
- if (sin6 && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
- /*
- * Given this is either an IPv6-only socket or no INET is
- * supported we will fail the send if the given destination
- * address is a v4mapped address.
- *
- * XXXGL: do we leak m and control?
- */
- INP_UNLOCK(inp);
- return (EINVAL);
- }
- if (control) {
- if ((error = ip6_setpktopts(control, &opt,
- inp->in6p_outputopts, td->td_ucred, nxt)) != 0) {
- INP_UNLOCK(inp);
- ip6_clearpktopts(&opt, -1);
- if (control)
- m_freem(control);
- m_freem(m);
- return (error);
- }
- optp = &opt;
- } else
- optp = inp->in6p_outputopts;
- NET_EPOCH_ENTER(et);
- if (sin6) {
- /*
- * Since we saw no essential reason for calling in_pcbconnect,
- * we get rid of such kind of logic, and call in6_selectsrc
- * and in6_pcbsetport in order to fill in the local address
- * and the local port.
- */
- if (sin6->sin6_port == 0) {
- error = EADDRNOTAVAIL;
- goto release;
- }
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- /* how about ::ffff:0.0.0.0 case? */
- error = EISCONN;
- goto release;
- }
- /*
- * Given we handle the v4mapped case in the INET block above
- * assert here that it must not happen anymore.
- */
- KASSERT(!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr),
- ("%s: sin6(%p)->sin6_addr is v4mapped which we "
- "should have handled.", __func__, sin6));
- /* This only requires read-locking. */
- error = in6_selectsrc_socket(sin6, optp, inp,
- td->td_ucred, scope_ambiguous, &in6a, NULL);
- if (error)
- goto release;
- laddr = &in6a;
- if (inp->inp_lport == 0) {
- struct inpcbinfo *pcbinfo;
- INP_WLOCK_ASSERT(inp);
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- INP_HASH_WLOCK(pcbinfo);
- error = in6_pcbsetport(laddr, inp, td->td_ucred);
- INP_HASH_WUNLOCK(pcbinfo);
- if (error != 0) {
- /* Undo an address bind that may have occurred. */
- inp->in6p_laddr = in6addr_any;
- goto release;
- }
- }
- faddr = &sin6->sin6_addr;
- fport = sin6->sin6_port; /* allow 0 port */
- } else {
- if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- error = ENOTCONN;
- goto release;
- }
- laddr = &inp->in6p_laddr;
- faddr = &inp->in6p_faddr;
- fport = inp->inp_fport;
- }
- ulen = m->m_pkthdr.len;
- plen = sizeof(struct udphdr) + ulen;
- hlen = sizeof(struct ip6_hdr);
- /*
- * Calculate data length and get a mbuf
- * for UDP and IP6 headers.
- */
- M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT);
- if (m == NULL) {
- error = ENOBUFS;
- goto release;
- }
- /*
- * Stuff checksum and output datagram.
- */
- cscov = cscov_partial = 0;
- udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
- udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */
- udp6->uh_dport = fport;
- if (nxt == IPPROTO_UDPLITE) {
- struct udpcb *up;
- up = intoudpcb(inp);
- cscov = up->u_txcslen;
- if (cscov >= plen)
- cscov = 0;
- udp6->uh_ulen = htons(cscov);
- /*
- * For UDP-Lite, checksum coverage length of zero means
- * the entire UDPLite packet is covered by the checksum.
- */
- cscov_partial = (cscov == 0) ? 0 : 1;
- } else if (plen <= 0xffff)
- udp6->uh_ulen = htons((u_short)plen);
- else
- udp6->uh_ulen = 0;
- udp6->uh_sum = 0;
- ip6 = mtod(m, struct ip6_hdr *);
- ip6->ip6_flow = inp->inp_flow & IPV6_FLOWINFO_MASK;
- ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
- ip6->ip6_vfc |= IPV6_VERSION;
- ip6->ip6_plen = htons((u_short)plen);
- ip6->ip6_nxt = nxt;
- ip6->ip6_hlim = in6_selecthlim(inp, NULL);
- ip6->ip6_src = *laddr;
- ip6->ip6_dst = *faddr;
- #ifdef MAC
- mac_inpcb_create_mbuf(inp, m);
- #endif
- if (cscov_partial) {
- if ((udp6->uh_sum = in6_cksum_partial(m, nxt,
- sizeof(struct ip6_hdr), plen, cscov)) == 0)
- udp6->uh_sum = 0xffff;
- } else {
- udp6->uh_sum = in6_cksum_pseudo(ip6, plen, nxt, 0);
- m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
- m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
- }
- flags = 0;
- #if defined(ROUTE_MPATH) || defined(RSS)
- if (CALC_FLOWID_OUTBOUND_SENDTO) {
- uint32_t hash_type, hash_val;
- uint8_t pr;
- pr = inp->inp_socket->so_proto->pr_protocol;
- hash_val = fib6_calc_packet_hash(laddr, faddr,
- inp->inp_lport, fport, pr, &hash_type);
- m->m_pkthdr.flowid = hash_val;
- M_HASHTYPE_SET(m, hash_type);
- }
- /* do not use inp flowid */
- flags |= IP_NODEFAULTFLOWID;
- #endif
- UDPSTAT_INC(udps_opackets);
- if (nxt == IPPROTO_UDPLITE)
- UDPLITE_PROBE(send, NULL, inp, ip6, inp, udp6);
- else
- UDP_PROBE(send, NULL, inp, ip6, inp, udp6);
- error = ip6_output(m, optp,
- INP_WLOCKED(inp) ? &inp->inp_route6 : NULL, flags,
- inp->in6p_moptions, NULL, inp);
- INP_UNLOCK(inp);
- NET_EPOCH_EXIT(et);
- if (control) {
- ip6_clearpktopts(&opt, -1);
- m_freem(control);
- }
- return (error);
- release:
- INP_UNLOCK(inp);
- NET_EPOCH_EXIT(et);
- if (control) {
- ip6_clearpktopts(&opt, -1);
- m_freem(control);
- }
- m_freem(m);
- return (error);
- }
- static void
- udp6_abort(struct socket *so)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("udp6_abort: inp == NULL"));
- INP_WLOCK(inp);
- #ifdef INET
- if (inp->inp_vflag & INP_IPV4) {
- struct pr_usrreqs *pru;
- uint8_t nxt;
- nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ?
- IPPROTO_UDP : IPPROTO_UDPLITE;
- INP_WUNLOCK(inp);
- pru = inetsw[ip_protox[nxt]].pr_usrreqs;
- (*pru->pru_abort)(so);
- return;
- }
- #endif
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- INP_HASH_WLOCK(pcbinfo);
- in6_pcbdisconnect(inp);
- inp->in6p_laddr = in6addr_any;
- INP_HASH_WUNLOCK(pcbinfo);
- soisdisconnected(so);
- }
- INP_WUNLOCK(inp);
- }
- static int
- udp6_attach(struct socket *so, int proto, struct thread *td)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- int error;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));
- if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
- error = soreserve(so, udp_sendspace, udp_recvspace);
- if (error)
- return (error);
- }
- INP_INFO_WLOCK(pcbinfo);
- error = in_pcballoc(so, pcbinfo);
- if (error) {
- INP_INFO_WUNLOCK(pcbinfo);
- return (error);
- }
- inp = (struct inpcb *)so->so_pcb;
- inp->inp_vflag |= INP_IPV6;
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
- inp->inp_vflag |= INP_IPV4;
- inp->in6p_hops = -1; /* use kernel default */
- inp->in6p_cksum = -1; /* just to be sure */
- /*
- * XXX: ugly!!
- * IPv4 TTL initialization is necessary for an IPv6 socket as well,
- * because the socket may be bound to an IPv6 wildcard address,
- * which may match an IPv4-mapped IPv6 address.
- */
- inp->inp_ip_ttl = V_ip_defttl;
- error = udp_newudpcb(inp);
- if (error) {
- in_pcbdetach(inp);
- in_pcbfree(inp);
- INP_INFO_WUNLOCK(pcbinfo);
- return (error);
- }
- INP_WUNLOCK(inp);
- INP_INFO_WUNLOCK(pcbinfo);
- return (0);
- }
- static int
- udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- int error;
- u_char vflagsav;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("udp6_bind: inp == NULL"));
- INP_WLOCK(inp);
- INP_HASH_WLOCK(pcbinfo);
- vflagsav = inp->inp_vflag;
- inp->inp_vflag &= ~INP_IPV4;
- inp->inp_vflag |= INP_IPV6;
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
- struct sockaddr_in6 *sin6_p;
- sin6_p = (struct sockaddr_in6 *)nam;
- if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
- inp->inp_vflag |= INP_IPV4;
- #ifdef INET
- else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
- struct sockaddr_in sin;
- in6_sin6_2_sin(&sin, sin6_p);
- inp->inp_vflag |= INP_IPV4;
- inp->inp_vflag &= ~INP_IPV6;
- error = in_pcbbind(inp, (struct sockaddr *)&sin,
- td->td_ucred);
- goto out;
- }
- #endif
- }
- error = in6_pcbbind(inp, nam, td->td_ucred);
- #ifdef INET
- out:
- #endif
- if (error != 0)
- inp->inp_vflag = vflagsav;
- INP_HASH_WUNLOCK(pcbinfo);
- INP_WUNLOCK(inp);
- return (error);
- }
- static void
- udp6_close(struct socket *so)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("udp6_close: inp == NULL"));
- INP_WLOCK(inp);
- #ifdef INET
- if (inp->inp_vflag & INP_IPV4) {
- struct pr_usrreqs *pru;
- uint8_t nxt;
- nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ?
- IPPROTO_UDP : IPPROTO_UDPLITE;
- INP_WUNLOCK(inp);
- pru = inetsw[ip_protox[nxt]].pr_usrreqs;
- (*pru->pru_disconnect)(so);
- return;
- }
- #endif
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- INP_HASH_WLOCK(pcbinfo);
- in6_pcbdisconnect(inp);
- inp->in6p_laddr = in6addr_any;
- INP_HASH_WUNLOCK(pcbinfo);
- soisdisconnected(so);
- }
- INP_WUNLOCK(inp);
- }
- static int
- udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
- {
- #ifdef INET
- struct epoch_tracker et;
- #endif
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- struct sockaddr_in6 *sin6;
- int error;
- u_char vflagsav;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- sin6 = (struct sockaddr_in6 *)nam;
- KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
- /*
- * XXXRW: Need to clarify locking of v4/v6 flags.
- */
- INP_WLOCK(inp);
- #ifdef INET
- if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
- struct sockaddr_in sin;
- if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
- error = EINVAL;
- goto out;
- }
- if ((inp->inp_vflag & INP_IPV4) == 0) {
- error = EAFNOSUPPORT;
- goto out;
- }
- if (inp->inp_faddr.s_addr != INADDR_ANY) {
- error = EISCONN;
- goto out;
- }
- in6_sin6_2_sin(&sin, sin6);
- error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
- if (error != 0)
- goto out;
- vflagsav = inp->inp_vflag;
- inp->inp_vflag |= INP_IPV4;
- inp->inp_vflag &= ~INP_IPV6;
- NET_EPOCH_ENTER(et);
- INP_HASH_WLOCK(pcbinfo);
- error = in_pcbconnect(inp, (struct sockaddr *)&sin,
- td->td_ucred);
- INP_HASH_WUNLOCK(pcbinfo);
- NET_EPOCH_EXIT(et);
- /*
- * If connect succeeds, mark socket as connected. If
- * connect fails and socket is unbound, reset inp_vflag
- * field.
- */
- if (error == 0)
- soisconnected(so);
- else if (inp->inp_laddr.s_addr == INADDR_ANY &&
- inp->inp_lport == 0)
- inp->inp_vflag = vflagsav;
- goto out;
- } else {
- if ((inp->inp_vflag & INP_IPV6) == 0) {
- error = EAFNOSUPPORT;
- goto out;
- }
- }
- #endif
- if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- error = EISCONN;
- goto out;
- }
- error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
- if (error != 0)
- goto out;
- vflagsav = inp->inp_vflag;
- inp->inp_vflag &= ~INP_IPV4;
- inp->inp_vflag |= INP_IPV6;
- INP_HASH_WLOCK(pcbinfo);
- error = in6_pcbconnect(inp, nam, td->td_ucred);
- INP_HASH_WUNLOCK(pcbinfo);
- /*
- * If connect succeeds, mark socket as connected. If
- * connect fails and socket is unbound, reset inp_vflag
- * field.
- */
- if (error == 0)
- soisconnected(so);
- else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
- inp->inp_lport == 0)
- inp->inp_vflag = vflagsav;
- out:
- INP_WUNLOCK(inp);
- return (error);
- }
- static void
- udp6_detach(struct socket *so)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- struct udpcb *up;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));
- INP_INFO_WLOCK(pcbinfo);
- INP_WLOCK(inp);
- up = intoudpcb(inp);
- KASSERT(up != NULL, ("%s: up == NULL", __func__));
- in_pcbdetach(inp);
- in_pcbfree(inp);
- INP_INFO_WUNLOCK(pcbinfo);
- udp_discardcb(up);
- }
- static int
- udp6_disconnect(struct socket *so)
- {
- struct inpcb *inp;
- struct inpcbinfo *pcbinfo;
- pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
- inp = sotoinpcb(so);
- KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL"));
- INP_WLOCK(inp);
- #ifdef INET
- if (inp->inp_vflag & INP_IPV4) {
- struct pr_usrreqs *pru;
- uint8_t nxt;
- nxt = (inp->inp_socket->so_proto->pr_protocol == IPPROTO_UDP) ?
- IPPROTO_UDP : IPPROTO_UDPLITE;
- INP_WUNLOCK(inp);
- pru = inetsw[ip_protox[nxt]].pr_usrreqs;
- (void)(*pru->pru_disconnect)(so);
- return (0);
- }
- #endif
- if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
- INP_WUNLOCK(inp);
- return (ENOTCONN);
- }
- INP_HASH_WLOCK(pcbinfo);
- in6_pcbdisconnect(inp);
- inp->in6p_laddr = in6addr_any;
- INP_HASH_WUNLOCK(pcbinfo);
- SOCK_LOCK(so);
- so->so_state &= ~SS_ISCONNECTED; /* XXX */
- SOCK_UNLOCK(so);
- INP_WUNLOCK(inp);
- return (0);
- }
- static int
- udp6_send(struct socket *so, int flags, struct mbuf *m,
- struct sockaddr *addr, struct mbuf *control, struct thread *td)
- {
- int error;
- if (addr) {
- if (addr->sa_len != sizeof(struct sockaddr_in6)) {
- error = EINVAL;
- goto bad;
- }
- if (addr->sa_family != AF_INET6) {
- error = EAFNOSUPPORT;
- goto bad;
- }
- }
- return (udp6_output(so, flags, m, addr, control, td));
- bad:
- if (control)
- m_freem(control);
- m_freem(m);
- return (error);
- }
- struct pr_usrreqs udp6_usrreqs = {
- .pru_abort = udp6_abort,
- .pru_attach = udp6_attach,
- .pru_bind = udp6_bind,
- .pru_connect = udp6_connect,
- .pru_control = in6_control,
- .pru_detach = udp6_detach,
- .pru_disconnect = udp6_disconnect,
- .pru_peeraddr = in6_mapped_peeraddr,
- .pru_send = udp6_send,
- .pru_shutdown = udp_shutdown,
- .pru_sockaddr = in6_mapped_sockaddr,
- .pru_soreceive = soreceive_dgram,
- .pru_sosend = sosend_dgram,
- .pru_sosetlabel = in_pcbsosetlabel,
- .pru_close = udp6_close
- };
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