udp6_usrreq.c revision 185370
154359Sroberto/*- 254359Sroberto * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 354359Sroberto * All rights reserved. 454359Sroberto * 554359Sroberto * Redistribution and use in source and binary forms, with or without 654359Sroberto * modification, are permitted provided that the following conditions 754359Sroberto * are met: 854359Sroberto * 1. Redistributions of source code must retain the above copyright 954359Sroberto * notice, this list of conditions and the following disclaimer. 1082498Sroberto * 2. Redistributions in binary form must reproduce the above copyright 1182498Sroberto * notice, this list of conditions and the following disclaimer in the 1282498Sroberto * documentation and/or other materials provided with the distribution. 1382498Sroberto * 3. Neither the name of the project nor the names of its contributors 1482498Sroberto * may be used to endorse or promote products derived from this software 1582498Sroberto * without specific prior written permission. 1654359Sroberto * 1754359Sroberto * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1854359Sroberto * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1954359Sroberto * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2054359Sroberto * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2154359Sroberto * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2254359Sroberto * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2356746Sroberto * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2454359Sroberto * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2554359Sroberto * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2654359Sroberto * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2754359Sroberto * SUCH DAMAGE. 28290000Sglebius * 29290000Sglebius * $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ 30290000Sglebius * $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $ 31290000Sglebius */ 32290000Sglebius 33290000Sglebius/*- 34290000Sglebius * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 3554359Sroberto * The Regents of the University of California. 36290000Sglebius * All rights reserved. 37290000Sglebius * 38290000Sglebius * Redistribution and use in source and binary forms, with or without 39290000Sglebius * modification, are permitted provided that the following conditions 40290000Sglebius * are met: 41290000Sglebius * 1. Redistributions of source code must retain the above copyright 42290000Sglebius * notice, this list of conditions and the following disclaimer. 4354359Sroberto * 2. Redistributions in binary form must reproduce the above copyright 4454359Sroberto * notice, this list of conditions and the following disclaimer in the 4554359Sroberto * documentation and/or other materials provided with the distribution. 4654359Sroberto * 4. Neither the name of the University nor the names of its contributors 47290000Sglebius * may be used to endorse or promote products derived from this software 4854359Sroberto * without specific prior written permission. 49290000Sglebius * 50290000Sglebius * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51290000Sglebius * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52290000Sglebius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53290000Sglebius * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54290000Sglebius * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55290000Sglebius * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56290000Sglebius * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57290000Sglebius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58290000Sglebius * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5954359Sroberto * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6054359Sroberto * SUCH DAMAGE. 6154359Sroberto * 6254359Sroberto * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 6354359Sroberto */ 6454359Sroberto 6554359Sroberto#include <sys/cdefs.h> 6654359Sroberto__FBSDID("$FreeBSD: head/sys/netinet6/udp6_usrreq.c 185370 2008-11-27 12:04:35Z bz $"); 6754359Sroberto 6854359Sroberto#include "opt_inet.h" 6954359Sroberto#include "opt_inet6.h" 7054359Sroberto#include "opt_ipsec.h" 7154359Sroberto#include "opt_mac.h" 72290000Sglebius 7354359Sroberto#include <sys/param.h> 74290000Sglebius#include <sys/kernel.h> 75290000Sglebius#include <sys/lock.h> 76290000Sglebius#include <sys/mbuf.h> 77290000Sglebius#include <sys/priv.h> 7854359Sroberto#include <sys/proc.h> 79290000Sglebius#include <sys/protosw.h> 8054359Sroberto#include <sys/signalvar.h> 81290000Sglebius#include <sys/socket.h> 82290000Sglebius#include <sys/socketvar.h> 83290000Sglebius#include <sys/sx.h> 8454359Sroberto#include <sys/sysctl.h> 85290000Sglebius#include <sys/syslog.h> 86290000Sglebius#include <sys/systm.h> 87290000Sglebius#include <sys/vimage.h> 88290000Sglebius 89290000Sglebius#include <net/if.h> 90290000Sglebius#include <net/if_types.h> 91290000Sglebius#include <net/route.h> 92290000Sglebius 93290000Sglebius#include <netinet/in.h> 9454359Sroberto#include <netinet/in_pcb.h> 95290000Sglebius#include <netinet/in_systm.h> 9654359Sroberto#include <netinet/in_var.h> 97290000Sglebius#include <netinet/ip.h> 98290000Sglebius#include <netinet/ip_icmp.h> 99290000Sglebius#include <netinet/ip6.h> 100290000Sglebius#include <netinet/icmp_var.h> 101290000Sglebius#include <netinet/icmp6.h> 102290000Sglebius#include <netinet/ip_var.h> 103290000Sglebius#include <netinet/udp.h> 104290000Sglebius#include <netinet/udp_var.h> 105290000Sglebius#include <netinet6/ip6protosw.h> 106290000Sglebius#include <netinet6/ip6_var.h> 107290000Sglebius#include <netinet6/in6_pcb.h> 108290000Sglebius#include <netinet6/udp6_var.h> 109290000Sglebius#include <netinet6/scope6_var.h> 110290000Sglebius 111290000Sglebius#ifdef IPSEC 112290000Sglebius#include <netipsec/ipsec.h> 113290000Sglebius#include <netipsec/ipsec6.h> 114290000Sglebius#endif /* IPSEC */ 115290000Sglebius 116290000Sglebius#include <security/mac/mac_framework.h> 117290000Sglebius 118290000Sglebius/* 11954359Sroberto * UDP protocol implementation. 12054359Sroberto * Per RFC 768, August, 1980. 121290000Sglebius */ 122290000Sglebius 123290000Sglebiusextern struct protosw inetsw[]; 124290000Sglebiusstatic void udp6_detach(struct socket *so); 125290000Sglebius 12654359Srobertostatic void 12754359Srobertoudp6_append(struct inpcb *inp, struct mbuf *n, int off, 12854359Sroberto struct sockaddr_in6 *fromsa) 12954359Sroberto{ 13054359Sroberto INIT_VNET_INET(inp->inp_vnet); 13154359Sroberto struct socket *so; 13254359Sroberto struct mbuf *opts; 13354359Sroberto 134132451Sroberto INP_LOCK_ASSERT(inp); 135182007Sroberto 136182007Sroberto#ifdef IPSEC 137182007Sroberto /* Check AH/ESP integrity. */ 138182007Sroberto if (ipsec6_in_reject(n, inp)) { 139290000Sglebius INIT_VNET_IPSEC(inp->inp_vnet); 140182007Sroberto m_freem(n); 141290000Sglebius V_ipsec6stat.in_polvio++; 142290000Sglebius return; 143290000Sglebius } 144290000Sglebius#endif /* IPSEC */ 145290000Sglebius#ifdef MAC 14654359Sroberto if (mac_inpcb_check_deliver(inp, n) != 0) { 14754359Sroberto m_freem(n); 14854359Sroberto return; 14954359Sroberto } 15082498Sroberto#endif 15154359Sroberto opts = NULL; 15254359Sroberto if (inp->in6p_flags & IN6P_CONTROLOPTS || 15354359Sroberto inp->inp_socket->so_options & SO_TIMESTAMP) 154132451Sroberto ip6_savecontrol(inp, n, &opts); 15556746Sroberto m_adj(n, off + sizeof(struct udphdr)); 15654359Sroberto 15754359Sroberto so = inp->inp_socket; 15854359Sroberto SOCKBUF_LOCK(&so->so_rcv); 159290000Sglebius if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n, 160290000Sglebius opts) == 0) { 161290000Sglebius SOCKBUF_UNLOCK(&so->so_rcv); 16254359Sroberto m_freem(n); 163290000Sglebius if (opts) 164290000Sglebius m_freem(opts); 165290000Sglebius V_udpstat.udps_fullsock++; 166290000Sglebius } else 16754359Sroberto sorwakeup_locked(so); 16856746Sroberto} 16954359Sroberto 17054359Srobertoint 171290000Sglebiusudp6_input(struct mbuf **mp, int *offp, int proto) 172290000Sglebius{ 173290000Sglebius INIT_VNET_INET(curvnet); 174290000Sglebius INIT_VNET_INET6(curvnet); 175290000Sglebius struct mbuf *m = *mp; 176290000Sglebius struct ip6_hdr *ip6; 177290000Sglebius struct udphdr *uh; 178290000Sglebius struct inpcb *inp; 179290000Sglebius int off = *offp; 18054359Sroberto int plen, ulen; 181290000Sglebius struct sockaddr_in6 fromsa; 182290000Sglebius 18354359Sroberto ip6 = mtod(m, struct ip6_hdr *); 18454359Sroberto 18554359Sroberto if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 18654359Sroberto /* XXX send icmp6 host/port unreach? */ 18754359Sroberto m_freem(m); 18854359Sroberto return (IPPROTO_DONE); 18954359Sroberto } 19054359Sroberto 19154359Sroberto#ifndef PULLDOWN_TEST 192290000Sglebius IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 19354359Sroberto ip6 = mtod(m, struct ip6_hdr *); 19454359Sroberto uh = (struct udphdr *)((caddr_t)ip6 + off); 19554359Sroberto#else 19654359Sroberto IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh)); 19754359Sroberto if (!uh) 19854359Sroberto return (IPPROTO_DONE); 19954359Sroberto#endif 20054359Sroberto 201132451Sroberto V_udpstat.udps_ipackets++; 20254359Sroberto 203290000Sglebius /* 204290000Sglebius * Destination port of 0 is illegal, based on RFC768. 20554359Sroberto */ 20654359Sroberto if (uh->uh_dport == 0) 20754359Sroberto goto badunlocked; 20854359Sroberto 209290000Sglebius plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 21054359Sroberto ulen = ntohs((u_short)uh->uh_ulen); 21154359Sroberto 212290000Sglebius if (plen != ulen) { 213290000Sglebius V_udpstat.udps_badlen++; 214290000Sglebius goto badunlocked; 21554359Sroberto } 21654359Sroberto 21754359Sroberto /* 218132451Sroberto * Checksum extended UDP header and data. 219132451Sroberto */ 22054359Sroberto if (uh->uh_sum == 0) { 22154359Sroberto V_udpstat.udps_nosum++; 22254359Sroberto goto badunlocked; 22354359Sroberto } 224132451Sroberto if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 225132451Sroberto V_udpstat.udps_badsum++; 226132451Sroberto goto badunlocked; 227132451Sroberto } 228290000Sglebius 22954359Sroberto /* 23054359Sroberto * Construct sockaddr format source address. 231132451Sroberto */ 23254359Sroberto init_sin6(&fromsa, m); 23354359Sroberto fromsa.sin6_port = uh->uh_sport; 23454359Sroberto 23554359Sroberto INP_INFO_RLOCK(&V_udbinfo); 23654359Sroberto if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 237290000Sglebius struct inpcb *last; 23854359Sroberto 239290000Sglebius /* 240290000Sglebius * In the event that laddr should be set to the link-local 24154359Sroberto * address (this happens in RIPng), the multicast address 24254359Sroberto * specified in the received packet will not match laddr. To 24354359Sroberto * handle this situation, matching is relaxed if the 24454359Sroberto * receiving interface is the same as one specified in the 24554359Sroberto * socket and if the destination multicast address matches 24654359Sroberto * one of the multicast groups specified in the socket. 24754359Sroberto */ 248132451Sroberto 24954359Sroberto /* 25054359Sroberto * KAME note: traditionally we dropped udpiphdr from mbuf 25154359Sroberto * here. We need udphdr for IPsec processing so we do that 25254359Sroberto * later. 25354359Sroberto */ 25454359Sroberto last = NULL; 25554359Sroberto LIST_FOREACH(inp, &V_udb, inp_list) { 25654359Sroberto if ((inp->inp_vflag & INP_IPV6) == 0) 25754359Sroberto continue; 25854359Sroberto if (inp->in6p_lport != uh->uh_dport) 25954359Sroberto continue; 26054359Sroberto /* 26154359Sroberto * XXX: Do not check source port of incoming datagram 26254359Sroberto * unless inp_connect() has been called to bind the 263290000Sglebius * fport part of the 4-tuple; the source could be 26454359Sroberto * trying to talk to us with an ephemeral port. 265290000Sglebius */ 266290000Sglebius if (inp->inp_fport != 0 && 267290000Sglebius inp->inp_fport != uh->uh_sport) 26854359Sroberto continue; 26954359Sroberto if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 27054359Sroberto if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 27154359Sroberto &ip6->ip6_dst)) 27254359Sroberto continue; 27354359Sroberto } 274290000Sglebius if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 275290000Sglebius if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 276290000Sglebius &ip6->ip6_src) || 277290000Sglebius inp->in6p_fport != uh->uh_sport) 27854359Sroberto continue; 27954359Sroberto } 28054359Sroberto 28154359Sroberto if (last != NULL) { 282290000Sglebius struct mbuf *n; 283290000Sglebius 284290000Sglebius if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 285290000Sglebius INP_RLOCK(last); 286290000Sglebius udp6_append(last, n, off, &fromsa); 28754359Sroberto INP_RUNLOCK(last); 28854359Sroberto } 28954359Sroberto } 29054359Sroberto last = inp; 29154359Sroberto /* 29254359Sroberto * Don't look for additional matches if this one does 29354359Sroberto * not have either the SO_REUSEPORT or SO_REUSEADDR 29454359Sroberto * socket options set. This heuristic avoids 29554359Sroberto * searching through all pcbs in the common case of a 29654359Sroberto * non-shared port. It assumes that an application 29754359Sroberto * will never clear these options after setting them. 29854359Sroberto */ 29954359Sroberto if ((last->inp_socket->so_options & 30054359Sroberto (SO_REUSEPORT|SO_REUSEADDR)) == 0) 30154359Sroberto break; 30254359Sroberto } 30354359Sroberto 30454359Sroberto if (last == NULL) { 30554359Sroberto /* 30654359Sroberto * No matching pcb found; discard datagram. (No need 307132451Sroberto * to send an ICMP Port Unreachable for a broadcast 30854359Sroberto * or multicast datgram.) 30954359Sroberto */ 31054359Sroberto V_udpstat.udps_noport++; 31154359Sroberto V_udpstat.udps_noportmcast++; 31254359Sroberto goto badheadlocked; 31354359Sroberto } 31454359Sroberto INP_RLOCK(last); 31554359Sroberto INP_INFO_RUNLOCK(&V_udbinfo); 31654359Sroberto udp6_append(last, m, off, &fromsa); 31754359Sroberto INP_RUNLOCK(last); 31854359Sroberto return (IPPROTO_DONE); 31954359Sroberto } 32054359Sroberto /* 32154359Sroberto * Locate pcb for datagram. 32254359Sroberto */ 32354359Sroberto inp = in6_pcblookup_hash(&V_udbinfo, &ip6->ip6_src, uh->uh_sport, 324132451Sroberto &ip6->ip6_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif); 32556746Sroberto if (inp == NULL) { 32654359Sroberto if (udp_log_in_vain) { 32756746Sroberto char ip6bufs[INET6_ADDRSTRLEN]; 32856746Sroberto char ip6bufd[INET6_ADDRSTRLEN]; 32956746Sroberto 33056746Sroberto log(LOG_INFO, 33154359Sroberto "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 33254359Sroberto ip6_sprintf(ip6bufd, &ip6->ip6_dst), 33354359Sroberto ntohs(uh->uh_dport), 33454359Sroberto ip6_sprintf(ip6bufs, &ip6->ip6_src), 335290000Sglebius ntohs(uh->uh_sport)); 33654359Sroberto } 33754359Sroberto V_udpstat.udps_noport++; 338290000Sglebius if (m->m_flags & M_MCAST) { 33954359Sroberto printf("UDP6: M_MCAST is set in a unicast packet.\n"); 34054359Sroberto V_udpstat.udps_noportmcast++; 34154359Sroberto goto badheadlocked; 342290000Sglebius } 343290000Sglebius INP_INFO_RUNLOCK(&V_udbinfo); 34454359Sroberto if (V_udp_blackhole) 34554359Sroberto goto badunlocked; 34654359Sroberto if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0) 347290000Sglebius goto badunlocked; 34854359Sroberto icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 34954359Sroberto return (IPPROTO_DONE); 35054359Sroberto } 35154359Sroberto INP_RLOCK(inp); 35254359Sroberto INP_INFO_RUNLOCK(&V_udbinfo); 35354359Sroberto udp6_append(inp, m, off, &fromsa); 35454359Sroberto INP_RUNLOCK(inp); 35554359Sroberto return (IPPROTO_DONE); 35654359Sroberto 35756746Srobertobadheadlocked: 35854359Sroberto INP_INFO_RUNLOCK(&V_udbinfo); 35954359Srobertobadunlocked: 36054359Sroberto if (m) 36154359Sroberto m_freem(m); 36254359Sroberto return (IPPROTO_DONE); 36354359Sroberto} 36454359Sroberto 36554359Srobertovoid 36654359Srobertoudp6_ctlinput(int cmd, struct sockaddr *sa, void *d) 36754359Sroberto{ 36854359Sroberto INIT_VNET_INET(curvnet); 36954359Sroberto struct udphdr uh; 370290000Sglebius struct ip6_hdr *ip6; 371132451Sroberto struct mbuf *m; 37254359Sroberto int off = 0; 37356746Sroberto struct ip6ctlparam *ip6cp = NULL; 37454359Sroberto const struct sockaddr_in6 *sa6_src = NULL; 37554359Sroberto void *cmdarg; 37654359Sroberto struct inpcb *(*notify)(struct inpcb *, int) = udp_notify; 37754359Sroberto struct udp_portonly { 37854359Sroberto u_int16_t uh_sport; 37954359Sroberto u_int16_t uh_dport; 38054359Sroberto } *uhp; 38154359Sroberto 38254359Sroberto if (sa->sa_family != AF_INET6 || 38354359Sroberto sa->sa_len != sizeof(struct sockaddr_in6)) 38454359Sroberto return; 38554359Sroberto 38654359Sroberto if ((unsigned)cmd >= PRC_NCMDS) 38754359Sroberto return; 38854359Sroberto if (PRC_IS_REDIRECT(cmd)) 38954359Sroberto notify = in6_rtchange, d = NULL; 39054359Sroberto else if (cmd == PRC_HOSTDEAD) 391290000Sglebius d = NULL; 392290000Sglebius else if (inet6ctlerrmap[cmd] == 0) 393290000Sglebius return; 394290000Sglebius 395290000Sglebius /* if the parameter is from icmp6, decode it. */ 39654359Sroberto if (d != NULL) { 39754359Sroberto ip6cp = (struct ip6ctlparam *)d; 39854359Sroberto m = ip6cp->ip6c_m; 39954359Sroberto ip6 = ip6cp->ip6c_ip6; 40054359Sroberto off = ip6cp->ip6c_off; 40154359Sroberto cmdarg = ip6cp->ip6c_cmdarg; 40254359Sroberto sa6_src = ip6cp->ip6c_src; 40354359Sroberto } else { 40454359Sroberto m = NULL; 40554359Sroberto ip6 = NULL; 40654359Sroberto cmdarg = NULL; 40754359Sroberto sa6_src = &sa6_any; 40854359Sroberto } 40954359Sroberto 41054359Sroberto if (ip6) { 41154359Sroberto /* 41254359Sroberto * XXX: We assume that when IPV6 is non NULL, 41354359Sroberto * M and OFF are valid. 41454359Sroberto */ 41554359Sroberto 41654359Sroberto /* Check if we can safely examine src and dst ports. */ 41754359Sroberto if (m->m_pkthdr.len < off + sizeof(*uhp)) 41854359Sroberto return; 419132451Sroberto 42054359Sroberto bzero(&uh, sizeof(uh)); 42154359Sroberto m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 422290000Sglebius 42354359Sroberto (void) in6_pcbnotify(&V_udbinfo, sa, uh.uh_dport, 424290000Sglebius (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd, 42554359Sroberto cmdarg, notify); 42654359Sroberto } else 42754359Sroberto (void) in6_pcbnotify(&V_udbinfo, sa, 0, 42854359Sroberto (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 42954359Sroberto} 430132451Sroberto 431132451Srobertostatic int 43254359Srobertoudp6_getcred(SYSCTL_HANDLER_ARGS) 43354359Sroberto{ 434132451Sroberto INIT_VNET_INET(curvnet); 43554359Sroberto INIT_VNET_INET6(curvnet); 43654359Sroberto struct xucred xuc; 43754359Sroberto struct sockaddr_in6 addrs[2]; 438132451Sroberto struct inpcb *inp; 439132451Sroberto int error; 440132451Sroberto 441132451Sroberto error = priv_check(req->td, PRIV_NETINET_GETCRED); 442132451Sroberto if (error) 443132451Sroberto return (error); 44454359Sroberto 445290000Sglebius if (req->newlen != sizeof(addrs)) 446132451Sroberto return (EINVAL); 44754359Sroberto if (req->oldlen != sizeof(struct xucred)) 44854359Sroberto return (EINVAL); 44954359Sroberto error = SYSCTL_IN(req, addrs, sizeof(addrs)); 45054359Sroberto if (error) 45154359Sroberto return (error); 45254359Sroberto if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 || 45354359Sroberto (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) { 45454359Sroberto return (error); 45554359Sroberto } 45654359Sroberto INP_INFO_RLOCK(&V_udbinfo); 457290000Sglebius inp = in6_pcblookup_hash(&V_udbinfo, &addrs[1].sin6_addr, 458290000Sglebius addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port, 1, 459290000Sglebius NULL); 460290000Sglebius if (inp != NULL) { 461290000Sglebius INP_RLOCK(inp); 46254359Sroberto INP_INFO_RUNLOCK(&V_udbinfo); 46354359Sroberto if (inp->inp_socket == NULL) 464132451Sroberto error = ENOENT; 46554359Sroberto if (error == 0) 46656746Sroberto error = cr_canseesocket(req->td->td_ucred, 46754359Sroberto inp->inp_socket); 46854359Sroberto if (error == 0) 46954359Sroberto cru2x(inp->inp_cred, &xuc); 47054359Sroberto INP_RUNLOCK(inp); 47154359Sroberto } else { 47254359Sroberto INP_INFO_RUNLOCK(&V_udbinfo); 47354359Sroberto error = ENOENT; 47454359Sroberto } 475290000Sglebius if (error == 0) 47654359Sroberto error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 477290000Sglebius return (error); 47854359Sroberto} 47954359Sroberto 48054359SrobertoSYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0, 48154359Sroberto 0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 482132451Sroberto 48354359Srobertostatic int 484132451Srobertoudp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6, 485132451Sroberto struct mbuf *control, struct thread *td) 486132451Sroberto{ 487132451Sroberto INIT_VNET_INET(curvnet); 48854359Sroberto INIT_VNET_INET6(curvnet); 489132451Sroberto u_int32_t ulen = m->m_pkthdr.len; 490132451Sroberto u_int32_t plen = sizeof(struct udphdr) + ulen; 491132451Sroberto struct ip6_hdr *ip6; 49254359Sroberto struct udphdr *udp6; 49354359Sroberto struct in6_addr *laddr, *faddr; 494290000Sglebius struct sockaddr_in6 *sin6 = NULL; 49554359Sroberto struct ifnet *oifp = NULL; 49654359Sroberto int scope_ambiguous = 0; 49754359Sroberto u_short fport; 498290000Sglebius int error = 0; 49954359Sroberto struct ip6_pktopts *optp, opt; 500290000Sglebius int af = AF_INET6, hlen = sizeof(struct ip6_hdr); 501290000Sglebius int flags; 50254359Sroberto struct sockaddr_in6 tmp; 50354359Sroberto 50454359Sroberto INP_WLOCK_ASSERT(inp); 50554359Sroberto 50654359Sroberto if (addr6) { 50754359Sroberto /* addr6 has been validated in udp6_send(). */ 50854359Sroberto sin6 = (struct sockaddr_in6 *)addr6; 50954359Sroberto 51054359Sroberto /* protect *sin6 from overwrites */ 51154359Sroberto tmp = *sin6; 51254359Sroberto sin6 = &tmp; 51354359Sroberto 51454359Sroberto /* 51554359Sroberto * Application should provide a proper zone ID or the use of 51654359Sroberto * default zone IDs should be enabled. Unfortunately, some 51754359Sroberto * applications do not behave as it should, so we need a 51854359Sroberto * workaround. Even if an appropriate ID is not determined, 51954359Sroberto * we'll see if we can determine the outgoing interface. If we 520290000Sglebius * can, determine the zone ID based on the interface below. 52154359Sroberto */ 52254359Sroberto if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 523290000Sglebius scope_ambiguous = 1; 524290000Sglebius if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 525290000Sglebius return (error); 52654359Sroberto } 527290000Sglebius 528290000Sglebius if (control) { 529290000Sglebius if ((error = ip6_setpktopts(control, &opt, 530290000Sglebius inp->in6p_outputopts, td->td_ucred, IPPROTO_UDP)) != 0) 531290000Sglebius goto release; 532290000Sglebius optp = &opt; 533290000Sglebius } else 534290000Sglebius optp = inp->in6p_outputopts; 535290000Sglebius 536290000Sglebius if (sin6) { 537290000Sglebius faddr = &sin6->sin6_addr; 538290000Sglebius 539290000Sglebius /* 540290000Sglebius * IPv4 version of udp_output calls in_pcbconnect in this case, 541290000Sglebius * which needs splnet and affects performance. 542290000Sglebius * Since we saw no essential reason for calling in_pcbconnect, 543290000Sglebius * we get rid of such kind of logic, and call in6_selectsrc 544290000Sglebius * and in6_pcbsetport in order to fill in the local address 54554359Sroberto * and the local port. 54654359Sroberto */ 54754359Sroberto if (sin6->sin6_port == 0) { 548290000Sglebius error = EADDRNOTAVAIL; 549290000Sglebius goto release; 550290000Sglebius } 55154359Sroberto 552290000Sglebius if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 553290000Sglebius /* how about ::ffff:0.0.0.0 case? */ 554290000Sglebius error = EISCONN; 555290000Sglebius goto release; 55654359Sroberto } 557290000Sglebius 558290000Sglebius fport = sin6->sin6_port; /* allow 0 port */ 559290000Sglebius 560290000Sglebius if (IN6_IS_ADDR_V4MAPPED(faddr)) { 561290000Sglebius if ((inp->in6p_flags & IN6P_IPV6_V6ONLY)) { 56254359Sroberto /* 56354359Sroberto * I believe we should explicitly discard the 56454359Sroberto * packet when mapped addresses are disabled, 56554359Sroberto * rather than send the packet as an IPv6 one. 56654359Sroberto * If we chose the latter approach, the packet 56754359Sroberto * might be sent out on the wire based on the 56854359Sroberto * default route, the situation which we'd 56954359Sroberto * probably want to avoid. 570132451Sroberto * (20010421 jinmei@kame.net) 57154359Sroberto */ 572132451Sroberto error = EINVAL; 57354359Sroberto goto release; 57454359Sroberto } 57554359Sroberto if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 57654359Sroberto !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 57754359Sroberto /* 57854359Sroberto * when remote addr is an IPv4-mapped address, 57954359Sroberto * local addr should not be an IPv6 address, 58054359Sroberto * since you cannot determine how to map IPv6 581290000Sglebius * source address to IPv4. 582290000Sglebius */ 58354359Sroberto error = EINVAL; 58454359Sroberto goto release; 58554359Sroberto } 58654359Sroberto 58754359Sroberto af = AF_INET; 58854359Sroberto } 58954359Sroberto 59054359Sroberto if (!IN6_IS_ADDR_V4MAPPED(faddr)) { 59154359Sroberto laddr = in6_selectsrc(sin6, optp, inp, NULL, 59254359Sroberto td->td_ucred, &oifp, &error); 59354359Sroberto if (oifp && scope_ambiguous && 59454359Sroberto (error = in6_setscope(&sin6->sin6_addr, 59554359Sroberto oifp, NULL))) { 59654359Sroberto goto release; 59754359Sroberto } 598290000Sglebius } else 599290000Sglebius laddr = &inp->in6p_laddr; /* XXX */ 60054359Sroberto if (laddr == NULL) { 60154359Sroberto if (error == 0) 602290000Sglebius error = EADDRNOTAVAIL; 60354359Sroberto goto release; 60454359Sroberto } 60554359Sroberto if (inp->in6p_lport == 0 && 60654359Sroberto (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) 607290000Sglebius goto release; 608290000Sglebius } else { 60954359Sroberto if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 61054359Sroberto error = ENOTCONN; 61154359Sroberto goto release; 61254359Sroberto } 61354359Sroberto if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) { 614290000Sglebius if ((inp->in6p_flags & IN6P_IPV6_V6ONLY)) { 615290000Sglebius /* 616290000Sglebius * XXX: this case would happen when the 61754359Sroberto * application sets the V6ONLY flag after 61854359Sroberto * connecting the foreign address. 619290000Sglebius * Such applications should be fixed, 620290000Sglebius * so we bark here. 621290000Sglebius */ 62254359Sroberto log(LOG_INFO, "udp6_output: IPV6_V6ONLY " 623290000Sglebius "option was set for a connected socket\n"); 624290000Sglebius error = EINVAL; 62554359Sroberto goto release; 62654359Sroberto } else 62754359Sroberto af = AF_INET; 628290000Sglebius } 629290000Sglebius laddr = &inp->in6p_laddr; 63054359Sroberto faddr = &inp->in6p_faddr; 63154359Sroberto fport = inp->in6p_fport; 632290000Sglebius } 633290000Sglebius 63454359Sroberto if (af == AF_INET) 635132451Sroberto hlen = sizeof(struct ip); 636132451Sroberto 637290000Sglebius /* 638290000Sglebius * Calculate data length and get a mbuf 63954359Sroberto * for UDP and IP6 headers. 640132451Sroberto */ 64154359Sroberto M_PREPEND(m, hlen + sizeof(struct udphdr), M_DONTWAIT); 642132451Sroberto if (m == 0) { 64354359Sroberto error = ENOBUFS; 644132451Sroberto goto release; 64554359Sroberto } 64654359Sroberto 64754359Sroberto /* 64854359Sroberto * Stuff checksum and output datagram. 64954359Sroberto */ 65054359Sroberto udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen); 65154359Sroberto udp6->uh_sport = inp->in6p_lport; /* lport is always set in the PCB */ 65254359Sroberto udp6->uh_dport = fport; 65354359Sroberto if (plen <= 0xffff) 65454359Sroberto udp6->uh_ulen = htons((u_short)plen); 65554359Sroberto else 65654359Sroberto udp6->uh_ulen = 0; 65754359Sroberto udp6->uh_sum = 0; 65854359Sroberto 65954359Sroberto switch (af) { 66054359Sroberto case AF_INET6: 66154359Sroberto ip6 = mtod(m, struct ip6_hdr *); 66254359Sroberto ip6->ip6_flow = inp->in6p_flowinfo & IPV6_FLOWINFO_MASK; 66354359Sroberto ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 66454359Sroberto ip6->ip6_vfc |= IPV6_VERSION; 66554359Sroberto#if 0 /* ip6_plen will be filled in ip6_output. */ 66654359Sroberto ip6->ip6_plen = htons((u_short)plen); 66754359Sroberto#endif 66854359Sroberto ip6->ip6_nxt = IPPROTO_UDP; 66954359Sroberto ip6->ip6_hlim = in6_selecthlim(inp, NULL); 67054359Sroberto ip6->ip6_src = *laddr; 67154359Sroberto ip6->ip6_dst = *faddr; 672290000Sglebius 673290000Sglebius if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP, 674290000Sglebius sizeof(struct ip6_hdr), plen)) == 0) { 67554359Sroberto udp6->uh_sum = 0xffff; 67654359Sroberto } 67754359Sroberto 67854359Sroberto flags = 0; 67954359Sroberto 680290000Sglebius V_udpstat.udps_opackets++; 681132451Sroberto error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions, 682182007Sroberto NULL, inp); 68354359Sroberto break; 68454359Sroberto case AF_INET: 685132451Sroberto error = EAFNOSUPPORT; 68654359Sroberto goto release; 687132451Sroberto } 68854359Sroberto goto releaseopt; 68954359Sroberto 69054359Srobertorelease: 69154359Sroberto m_freem(m); 69254359Sroberto 69354359Srobertoreleaseopt: 69454359Sroberto if (control) { 69554359Sroberto ip6_clearpktopts(&opt, -1); 69654359Sroberto m_freem(control); 69754359Sroberto } 698132451Sroberto return (error); 69954359Sroberto} 700290000Sglebius 701290000Sglebiusstatic void 702290000Sglebiusudp6_abort(struct socket *so) 703290000Sglebius{ 70454359Sroberto INIT_VNET_INET(so->so_vnet); 705290000Sglebius struct inpcb *inp; 706290000Sglebius 707290000Sglebius inp = sotoinpcb(so); 708290000Sglebius KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); 709290000Sglebius 710290000Sglebius#ifdef INET 711290000Sglebius if (inp->inp_vflag & INP_IPV4) { 712290000Sglebius struct pr_usrreqs *pru; 713290000Sglebius 714290000Sglebius pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 715290000Sglebius (*pru->pru_abort)(so); 716290000Sglebius return; 717290000Sglebius } 718290000Sglebius#endif 719290000Sglebius 720290000Sglebius INP_INFO_WLOCK(&V_udbinfo); 721290000Sglebius INP_WLOCK(inp); 722290000Sglebius if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 723290000Sglebius in6_pcbdisconnect(inp); 724290000Sglebius inp->in6p_laddr = in6addr_any; 725290000Sglebius soisdisconnected(so); 726290000Sglebius } 727290000Sglebius INP_WUNLOCK(inp); 728290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 729290000Sglebius} 730290000Sglebius 731290000Sglebiusstatic int 732290000Sglebiusudp6_attach(struct socket *so, int proto, struct thread *td) 733290000Sglebius{ 734290000Sglebius INIT_VNET_INET(so->so_vnet); 735290000Sglebius struct inpcb *inp; 736290000Sglebius int error; 737290000Sglebius 738290000Sglebius inp = sotoinpcb(so); 739290000Sglebius KASSERT(inp == NULL, ("udp6_attach: inp != NULL")); 740290000Sglebius 741290000Sglebius if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 742290000Sglebius error = soreserve(so, udp_sendspace, udp_recvspace); 743290000Sglebius if (error) 744290000Sglebius return (error); 745290000Sglebius } 746290000Sglebius INP_INFO_WLOCK(&V_udbinfo); 747290000Sglebius error = in_pcballoc(so, &V_udbinfo); 748290000Sglebius if (error) { 749290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 750290000Sglebius return (error); 751290000Sglebius } 752290000Sglebius inp = (struct inpcb *)so->so_pcb; 753290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 754290000Sglebius inp->inp_vflag |= INP_IPV6; 755290000Sglebius if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 756290000Sglebius inp->inp_vflag |= INP_IPV4; 757290000Sglebius inp->in6p_hops = -1; /* use kernel default */ 758290000Sglebius inp->in6p_cksum = -1; /* just to be sure */ 759290000Sglebius /* 760290000Sglebius * XXX: ugly!! 761290000Sglebius * IPv4 TTL initialization is necessary for an IPv6 socket as well, 762290000Sglebius * because the socket may be bound to an IPv6 wildcard address, 763290000Sglebius * which may match an IPv4-mapped IPv6 address. 764290000Sglebius */ 765290000Sglebius inp->inp_ip_ttl = V_ip_defttl; 766290000Sglebius INP_WUNLOCK(inp); 767290000Sglebius return (0); 768290000Sglebius} 769290000Sglebius 770290000Sglebiusstatic int 77154359Srobertoudp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 77254359Sroberto{ 773290000Sglebius INIT_VNET_INET(so->so_vnet); 774290000Sglebius struct inpcb *inp; 77554359Sroberto int error; 776290000Sglebius 777290000Sglebius inp = sotoinpcb(so); 778290000Sglebius KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); 779290000Sglebius 78054359Sroberto INP_INFO_WLOCK(&V_udbinfo); 781290000Sglebius INP_WLOCK(inp); 782290000Sglebius inp->inp_vflag &= ~INP_IPV4; 783290000Sglebius inp->inp_vflag |= INP_IPV6; 784290000Sglebius if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 785290000Sglebius struct sockaddr_in6 *sin6_p; 786290000Sglebius 787290000Sglebius sin6_p = (struct sockaddr_in6 *)nam; 788290000Sglebius 789290000Sglebius if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 790290000Sglebius inp->inp_vflag |= INP_IPV4; 79154359Sroberto else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 792290000Sglebius struct sockaddr_in sin; 793290000Sglebius 794290000Sglebius in6_sin6_2_sin(&sin, sin6_p); 795290000Sglebius inp->inp_vflag |= INP_IPV4; 796290000Sglebius inp->inp_vflag &= ~INP_IPV6; 797290000Sglebius error = in_pcbbind(inp, (struct sockaddr *)&sin, 798290000Sglebius td->td_ucred); 79954359Sroberto goto out; 800290000Sglebius } 801290000Sglebius } 802290000Sglebius 803290000Sglebius error = in6_pcbbind(inp, nam, td->td_ucred); 80454359Srobertoout: 805290000Sglebius INP_WUNLOCK(inp); 806290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 807290000Sglebius return (error); 808290000Sglebius} 809290000Sglebius 81054359Srobertostatic void 811290000Sglebiusudp6_close(struct socket *so) 812290000Sglebius{ 813290000Sglebius INIT_VNET_INET(so->so_vnet); 814290000Sglebius struct inpcb *inp; 815290000Sglebius 81654359Sroberto inp = sotoinpcb(so); 817290000Sglebius KASSERT(inp != NULL, ("udp6_close: inp == NULL")); 818290000Sglebius 819290000Sglebius#ifdef INET 82054359Sroberto if (inp->inp_vflag & INP_IPV4) { 82154359Sroberto struct pr_usrreqs *pru; 82254359Sroberto 82354359Sroberto pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 82454359Sroberto (*pru->pru_disconnect)(so); 82554359Sroberto return; 82654359Sroberto } 827290000Sglebius#endif 828290000Sglebius INP_INFO_WLOCK(&V_udbinfo); 829290000Sglebius INP_WLOCK(inp); 830290000Sglebius if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 83154359Sroberto in6_pcbdisconnect(inp); 83254359Sroberto inp->in6p_laddr = in6addr_any; 83354359Sroberto soisdisconnected(so); 83454359Sroberto } 83554359Sroberto INP_WUNLOCK(inp); 83654359Sroberto INP_INFO_WUNLOCK(&V_udbinfo); 83754359Sroberto} 83854359Sroberto 83954359Srobertostatic int 84054359Srobertoudp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 84154359Sroberto{ 84254359Sroberto INIT_VNET_INET(so->so_vnet); 84354359Sroberto struct inpcb *inp; 844290000Sglebius int error; 845290000Sglebius 846290000Sglebius inp = sotoinpcb(so); 847290000Sglebius KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); 84854359Sroberto 849290000Sglebius INP_INFO_WLOCK(&V_udbinfo); 850290000Sglebius INP_WLOCK(inp); 851290000Sglebius if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 85254359Sroberto struct sockaddr_in6 *sin6_p; 85354359Sroberto 854290000Sglebius sin6_p = (struct sockaddr_in6 *)nam; 85554359Sroberto if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 856290000Sglebius struct sockaddr_in sin; 85754359Sroberto 858290000Sglebius if (inp->inp_faddr.s_addr != INADDR_ANY) { 85954359Sroberto error = EISCONN; 86054359Sroberto goto out; 86154359Sroberto } 862290000Sglebius in6_sin6_2_sin(&sin, sin6_p); 863290000Sglebius error = in_pcbconnect(inp, (struct sockaddr *)&sin, 864290000Sglebius td->td_ucred); 865290000Sglebius if (error == 0) { 866290000Sglebius inp->inp_vflag |= INP_IPV4; 86754359Sroberto inp->inp_vflag &= ~INP_IPV6; 868290000Sglebius soisconnected(so); 869290000Sglebius } 870290000Sglebius goto out; 871290000Sglebius } 87254359Sroberto } 873290000Sglebius if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 874290000Sglebius error = EISCONN; 87554359Sroberto goto out; 87654359Sroberto } 877290000Sglebius error = in6_pcbconnect(inp, nam, td->td_ucred); 878290000Sglebius if (error == 0) { 879290000Sglebius if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 88054359Sroberto /* should be non mapped addr */ 881290000Sglebius inp->inp_vflag &= ~INP_IPV4; 882290000Sglebius inp->inp_vflag |= INP_IPV6; 883290000Sglebius } 884290000Sglebius soisconnected(so); 885290000Sglebius } 886290000Sglebiusout: 887290000Sglebius INP_WUNLOCK(inp); 888290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 889290000Sglebius return (error); 89054359Sroberto} 89154359Sroberto 892290000Sglebiusstatic void 893132451Srobertoudp6_detach(struct socket *so) 894132451Sroberto{ 895132451Sroberto INIT_VNET_INET(so->so_vnet); 896132451Sroberto struct inpcb *inp; 897132451Sroberto 898132451Sroberto inp = sotoinpcb(so); 899132451Sroberto KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); 900132451Sroberto 901132451Sroberto INP_INFO_WLOCK(&V_udbinfo); 902132451Sroberto INP_WLOCK(inp); 90354359Sroberto in_pcbdetach(inp); 904290000Sglebius in_pcbfree(inp); 90554359Sroberto INP_INFO_WUNLOCK(&V_udbinfo); 906290000Sglebius} 907290000Sglebius 908132451Srobertostatic int 909132451Srobertoudp6_disconnect(struct socket *so) 91054359Sroberto{ 911132451Sroberto INIT_VNET_INET(so->so_vnet); 91254359Sroberto struct inpcb *inp; 913290000Sglebius int error; 914290000Sglebius 915290000Sglebius inp = sotoinpcb(so); 916290000Sglebius KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); 917290000Sglebius 918290000Sglebius INP_INFO_WLOCK(&V_udbinfo); 919290000Sglebius INP_WLOCK(inp); 920290000Sglebius 921290000Sglebius#ifdef INET 922290000Sglebius if (inp->inp_vflag & INP_IPV4) { 923290000Sglebius struct pr_usrreqs *pru; 924290000Sglebius 925290000Sglebius pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 926290000Sglebius error = (*pru->pru_disconnect)(so); 927290000Sglebius goto out; 928290000Sglebius } 92954359Sroberto#endif 930132451Sroberto 93154359Sroberto if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 932290000Sglebius error = ENOTCONN; 933290000Sglebius goto out; 934290000Sglebius } 935290000Sglebius 936290000Sglebius in6_pcbdisconnect(inp); 937290000Sglebius inp->in6p_laddr = in6addr_any; 938290000Sglebius SOCK_LOCK(so); 939290000Sglebius so->so_state &= ~SS_ISCONNECTED; /* XXX */ 940290000Sglebius SOCK_UNLOCK(so); 941290000Sglebiusout: 942290000Sglebius INP_WUNLOCK(inp); 943290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 944290000Sglebius return (0); 945290000Sglebius} 946290000Sglebius 947290000Sglebiusstatic int 948132451Srobertoudp6_send(struct socket *so, int flags, struct mbuf *m, 949132451Sroberto struct sockaddr *addr, struct mbuf *control, struct thread *td) 950132451Sroberto{ 951290000Sglebius INIT_VNET_INET(so->so_vnet); 95254359Sroberto struct inpcb *inp; 953290000Sglebius int error = 0; 954132451Sroberto 955132451Sroberto inp = sotoinpcb(so); 956132451Sroberto KASSERT(inp != NULL, ("udp6_send: inp == NULL")); 95754359Sroberto 958132451Sroberto INP_INFO_WLOCK(&V_udbinfo); 959290000Sglebius INP_WLOCK(inp); 960132451Sroberto if (addr) { 96154359Sroberto if (addr->sa_len != sizeof(struct sockaddr_in6)) { 962132451Sroberto error = EINVAL; 96354359Sroberto goto bad; 96454359Sroberto } 965290000Sglebius if (addr->sa_family != AF_INET6) { 96654359Sroberto error = EAFNOSUPPORT; 96754359Sroberto goto bad; 96854359Sroberto } 96954359Sroberto } 97054359Sroberto 97154359Sroberto#ifdef INET 972132451Sroberto if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 973132451Sroberto int hasv4addr; 974290000Sglebius struct sockaddr_in6 *sin6 = 0; 97554359Sroberto 97654359Sroberto if (addr == 0) 97754359Sroberto hasv4addr = (inp->inp_vflag & INP_IPV4); 97854359Sroberto else { 97954359Sroberto sin6 = (struct sockaddr_in6 *)addr; 98054359Sroberto hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 98154359Sroberto ? 1 : 0; 98254359Sroberto } 98354359Sroberto if (hasv4addr) { 98454359Sroberto struct pr_usrreqs *pru; 98554359Sroberto 986132451Sroberto if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 98754359Sroberto !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 98854359Sroberto /* 989182007Sroberto * When remote addr is IPv4-mapped address, 990290000Sglebius * local addr should not be an IPv6 address; 991290000Sglebius * since you cannot determine how to map IPv6 992290000Sglebius * source address to IPv4. 993132451Sroberto */ 994132451Sroberto error = EINVAL; 995132451Sroberto goto out; 996290000Sglebius } 997132451Sroberto 99854359Sroberto /* 99954359Sroberto * XXXRW: We release UDP-layer locks before calling 100054359Sroberto * udp_send() in order to avoid recursion. However, 100154359Sroberto * this does mean there is a short window where inp's 100254359Sroberto * fields are unstable. Could this lead to a 100354359Sroberto * potential race in which the factors causing us to 100454359Sroberto * select the UDPv4 output routine are invalidated? 100554359Sroberto */ 100654359Sroberto INP_WUNLOCK(inp); 1007290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 1008290000Sglebius if (sin6) 1009290000Sglebius in6_sin6_2_sin_in_sock(addr); 1010290000Sglebius pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 101154359Sroberto /* addr will just be freed in sendit(). */ 101254359Sroberto return ((*pru->pru_send)(so, flags, m, addr, control, 101354359Sroberto td)); 101454359Sroberto } 101554359Sroberto } 101654359Sroberto#endif 101754359Sroberto#ifdef MAC 101854359Sroberto mac_inpcb_create_mbuf(inp, m); 101954359Sroberto#endif 102054359Sroberto error = udp6_output(inp, m, addr, control, td); 1021290000Sglebiusout: 102254359Sroberto INP_WUNLOCK(inp); 102354359Sroberto INP_INFO_WUNLOCK(&V_udbinfo); 102454359Sroberto return (error); 102554359Sroberto 102656746Srobertobad: 102754359Sroberto INP_WUNLOCK(inp); 1028290000Sglebius INP_INFO_WUNLOCK(&V_udbinfo); 102954359Sroberto m_freem(m); 1030132451Sroberto return (error); 1031132451Sroberto} 1032290000Sglebius 103354359Srobertostruct pr_usrreqs udp6_usrreqs = { 103456746Sroberto .pru_abort = udp6_abort, 103556746Sroberto .pru_attach = udp6_attach, 103654359Sroberto .pru_bind = udp6_bind, 1037132451Sroberto .pru_connect = udp6_connect, 103854359Sroberto .pru_control = in6_control, 103954359Sroberto .pru_detach = udp6_detach, 1040290000Sglebius .pru_disconnect = udp6_disconnect, 104154359Sroberto .pru_peeraddr = in6_mapped_peeraddr, 104254359Sroberto .pru_send = udp6_send, 104354359Sroberto .pru_shutdown = udp_shutdown, 1044 .pru_sockaddr = in6_mapped_sockaddr, 1045 .pru_soreceive = soreceive_dgram, 1046 .pru_sosend = sosend_dgram, 1047 .pru_sosetlabel = in_pcbsosetlabel, 1048 .pru_close = udp6_close 1049}; 1050