diff options
Diffstat (limited to 'sys/netinet6/udp6_usrreq.c')
| -rw-r--r-- | sys/netinet6/udp6_usrreq.c | 800 |
1 files changed, 800 insertions, 0 deletions
diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c new file mode 100644 index 0000000..4cf0e13 --- /dev/null +++ b/sys/netinet6/udp6_usrreq.c @@ -0,0 +1,800 @@ +/* $FreeBSD$ */ +/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ + +/*- + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * 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 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. + */ + +/*- + * Copyright (c) 1982, 1986, 1989, 1993 + * 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. + * 4. 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_var.h 8.1 (Berkeley) 6/10/93 + */ + +#include "opt_inet.h" +#include "opt_inet6.h" +#include "opt_ipsec.h" + +#include <sys/param.h> +#include <sys/errno.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/signalvar.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/stat.h> +#include <sys/sx.h> +#include <sys/sysctl.h> +#include <sys/syslog.h> +#include <sys/systm.h> + +#include <net/if.h> +#include <net/if_types.h> +#include <net/route.h> + +#include <netinet/in.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 <netinet6/ip6protosw.h> +#include <netinet6/ip6_var.h> +#include <netinet6/in6_pcb.h> +#include <netinet6/udp6_var.h> +#include <netinet6/scope6_var.h> + +#ifdef FAST_IPSEC +#include <netipsec/ipsec.h> +#include <netipsec/ipsec6.h> +#endif /* FAST_IPSEC */ + +/* + * UDP protocol inplementation. + * Per RFC 768, August, 1980. + */ + +extern struct protosw inetsw[]; +static void udp6_detach __P((struct socket *so)); + +static void +udp6_append(struct inpcb *in6p, struct mbuf *n, int off, + struct sockaddr_in6 *fromsa) +{ + struct socket *so; + struct mbuf *opts; + + /* XXXRW: Not yet: INP_LOCK_ASSERT(in6p); */ + +#ifdef FAST_IPSEC + /* + * Check AH/ESP integrity. + */ + if (ipsec6_in_reject(n, in6p)) { + m_freem(n); + ipsec6stat.in_polvio++; + return; + } +#endif /* FAST_IPSEC */ + + opts = NULL; + if (in6p->in6p_flags & IN6P_CONTROLOPTS || + in6p->inp_socket->so_options & SO_TIMESTAMP) + ip6_savecontrol(in6p, n, &opts); + m_adj(n, off + sizeof(struct udphdr)); + + so = in6p->inp_socket; + SOCKBUF_LOCK(&so->so_rcv); + if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n, + opts) == 0) { + SOCKBUF_UNLOCK(&so->so_rcv); + m_freem(n); + if (opts) + m_freem(opts); + udpstat.udps_fullsock++; + } else + sorwakeup_locked(so); +} + +int +udp6_input(mp, offp, proto) + struct mbuf **mp; + int *offp, proto; +{ + struct mbuf *m = *mp; + register struct ip6_hdr *ip6; + register struct udphdr *uh; + register struct inpcb *in6p; + int off = *offp; + int plen, ulen; + struct sockaddr_in6 fromsa; + + ip6 = mtod(m, struct ip6_hdr *); + + if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { + /* XXX send icmp6 host/port unreach? */ + m_freem(m); + return IPPROTO_DONE; + } + +#ifndef PULLDOWN_TEST + IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); + ip6 = mtod(m, struct ip6_hdr *); + uh = (struct udphdr *)((caddr_t)ip6 + off); +#else + IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh)); + if (!uh) + return IPPROTO_DONE; +#endif + + udpstat.udps_ipackets++; + + plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); + ulen = ntohs((u_short)uh->uh_ulen); + + if (plen != ulen) { + udpstat.udps_badlen++; + goto bad; + } + + /* + * Checksum extended UDP header and data. + */ + if (uh->uh_sum == 0) { + udpstat.udps_nosum++; + goto bad_unlocked; + } + if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { + udpstat.udps_badsum++; + goto bad_unlocked; + } + + /* + * Construct sockaddr format source address. + */ + init_sin6(&fromsa, m); + fromsa.sin6_port = uh->uh_sport; + + INP_INFO_RLOCK(&udbinfo); + if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { + struct inpcb *last; + + /* + * Deliver a multicast datagram to all sockets + * for which the local and remote addresses and ports match + * those of the incoming datagram. This allows more than + * one process to receive multicasts on the same port. + * (This really ought to be done for unicast datagrams as + * well, but that would cause problems with existing + * applications that open both address-specific sockets and + * a wildcard socket listening to the same port -- they would + * end up receiving duplicates of every unicast datagram. + * Those applications open the multiple sockets to overcome an + * inadequacy of the UDP socket interface, but for backwards + * compatibility we avoid the problem here rather than + * fixing the interface. Maybe 4.5BSD will remedy this?) + */ + + /* + * In a case that laddr should be set to the link-local + * address (this happens in RIPng), the multicast address + * specified in the received packet does not match with + * laddr. To cure this situation, the 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. + */ + + /* + * Locate pcb(s) for datagram. + * (Algorithm copied from raw_intr().) + * + * XXXRW: The individual inpcbs need to be locked in the + * style of udp_input(). + */ + last = NULL; + LIST_FOREACH(in6p, &udb, inp_list) { + if ((in6p->inp_vflag & INP_IPV6) == 0) + continue; + if (in6p->in6p_lport != uh->uh_dport) + continue; + if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { + if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, + &ip6->ip6_dst)) + continue; + } + if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { + if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, + &ip6->ip6_src) || + in6p->in6p_fport != uh->uh_sport) + continue; + } + + if (last != NULL) { + struct mbuf *n; + + if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { + INP_LOCK(last); + udp6_append(last, n, off, &fromsa); + INP_UNLOCK(last); + } + } + last = in6p; + /* + * 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->in6p_socket->so_options & + (SO_REUSEPORT|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.udps_noport++; + udpstat.udps_noportmcast++; + goto bad; + } + INP_LOCK(last); + udp6_append(last, m, off, &fromsa); + INP_UNLOCK(last); + INP_INFO_RUNLOCK(&udbinfo); + return IPPROTO_DONE; + } + /* + * Locate pcb for datagram. + */ + in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, + &ip6->ip6_dst, uh->uh_dport, 1, + m->m_pkthdr.rcvif); + if (in6p == NULL) { + if (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)); + } + udpstat.udps_noport++; + if (m->m_flags & M_MCAST) { + printf("UDP6: M_MCAST is set in a unicast packet.\n"); + udpstat.udps_noportmcast++; + goto bad; + } + INP_INFO_RUNLOCK(&udbinfo); + icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); + return IPPROTO_DONE; + } + INP_LOCK(in6p); + udp6_append(in6p, m, off, &fromsa); + INP_UNLOCK(in6p); + INP_INFO_RUNLOCK(&udbinfo); + return IPPROTO_DONE; +bad: + INP_INFO_RUNLOCK(&udbinfo); +bad_unlocked: + if (m) + m_freem(m); + return IPPROTO_DONE; +} + +void +udp6_ctlinput(cmd, sa, d) + int cmd; + struct sockaddr *sa; + void *d; +{ + 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) __P((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); + + (void) in6_pcbnotify(&udbinfo, sa, uh.uh_dport, + (struct sockaddr *)ip6cp->ip6c_src, + uh.uh_sport, cmd, cmdarg, notify); + } else + (void) in6_pcbnotify(&udbinfo, sa, 0, + (const struct sockaddr *)sa6_src, + 0, cmd, cmdarg, notify); +} + +static int +udp6_getcred(SYSCTL_HANDLER_ARGS) +{ + struct xucred xuc; + struct sockaddr_in6 addrs[2]; + 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], ip6_use_defzone)) != 0 || + (error = sa6_embedscope(&addrs[1], ip6_use_defzone)) != 0) { + return (error); + } + INP_INFO_RLOCK(&udbinfo); + inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, + addrs[1].sin6_port, + &addrs[0].sin6_addr, addrs[0].sin6_port, + 1, NULL); + if (inp == NULL) { + INP_INFO_RUNLOCK(&udbinfo); + return (ENOENT); + } + INP_LOCK(inp); + KASSERT(inp->inp_socket != NULL, + ("udp6_getcred: inp_socket == NULL")); + /* + * XXXRW: There should be a scoping access control check here. + */ + cru2x(inp->inp_socket->so_cred, &xuc); + INP_UNLOCK(inp); + INP_INFO_RUNLOCK(&udbinfo); + error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); + return (error); +} + +SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, + 0, 0, + udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); + +static void +udp6_abort(struct socket *so) +{ + struct inpcb *inp; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_abort: inp == NULL")); + +#ifdef INET + if (inp->inp_vflag & INP_IPV4) { + struct pr_usrreqs *pru; + + pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; + (*pru->pru_abort)(so); + return; + } +#endif + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { + in6_pcbdisconnect(inp); + inp->in6p_laddr = in6addr_any; + soisdisconnected(so); + } + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); +} + +static int +udp6_attach(struct socket *so, int proto, struct thread *td) +{ + struct inpcb *inp; + int error; + + 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(&udbinfo); + error = in_pcballoc(so, &udbinfo); + if (error) { + INP_INFO_WUNLOCK(&udbinfo); + return error; + } + inp = (struct inpcb *)so->so_pcb; + INP_INFO_WUNLOCK(&udbinfo); + 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 = ip_defttl; + INP_UNLOCK(inp); + return 0; +} + +static int +udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) +{ + struct inpcb *inp; + int error; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_bind: inp == NULL")); + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + 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; + 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; + } + } + + error = in6_pcbbind(inp, nam, td->td_ucred); +out: + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); + return error; +} + +static void +udp6_close(struct socket *so) +{ + struct inpcb *inp; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_close: inp == NULL")); + +#ifdef INET + if (inp->inp_vflag & INP_IPV4) { + struct pr_usrreqs *pru; + + pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; + (*pru->pru_disconnect)(so); + return; + } +#endif + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { + in6_pcbdisconnect(inp); + inp->in6p_laddr = in6addr_any; + soisdisconnected(so); + } + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); +} + +static int +udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) +{ + struct inpcb *inp; + int error; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_connect: inp == NULL")); + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { + struct sockaddr_in6 *sin6_p; + + sin6_p = (struct sockaddr_in6 *)nam; + if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { + struct sockaddr_in sin; + + if (inp->inp_faddr.s_addr != INADDR_ANY) { + error = EISCONN; + goto out; + } + in6_sin6_2_sin(&sin, sin6_p); + error = in_pcbconnect(inp, (struct sockaddr *)&sin, + td->td_ucred); + if (error == 0) { + inp->inp_vflag |= INP_IPV4; + inp->inp_vflag &= ~INP_IPV6; + soisconnected(so); + } + goto out; + } + } + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { + error = EISCONN; + goto out; + } + error = in6_pcbconnect(inp, nam, td->td_ucred); + if (error == 0) { + if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { + /* should be non mapped addr */ + inp->inp_vflag &= ~INP_IPV4; + inp->inp_vflag |= INP_IPV6; + } + soisconnected(so); + } +out: + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); + return error; +} + +static void +udp6_detach(struct socket *so) +{ + struct inpcb *inp; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_detach: inp == NULL")); + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + in6_pcbdetach(inp); + in6_pcbfree(inp); + INP_INFO_WUNLOCK(&udbinfo); +} + +static int +udp6_disconnect(struct socket *so) +{ + struct inpcb *inp; + int error; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL")); + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + +#ifdef INET + if (inp->inp_vflag & INP_IPV4) { + struct pr_usrreqs *pru; + + pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; + error = (*pru->pru_disconnect)(so); + goto out; + } +#endif + + if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { + error = ENOTCONN; + goto out; + } + + in6_pcbdisconnect(inp); + inp->in6p_laddr = in6addr_any; + /* XXXRW: so_state locking? */ + so->so_state &= ~SS_ISCONNECTED; /* XXX */ +out: + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); + return 0; +} + +static int +udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct thread *td) +{ + struct inpcb *inp; + int error = 0; + + inp = sotoinpcb(so); + KASSERT(inp != NULL, ("udp6_send: inp == NULL")); + + INP_INFO_WLOCK(&udbinfo); + INP_LOCK(inp); + if (addr) { + if (addr->sa_len != sizeof(struct sockaddr_in6)) { + error = EINVAL; + goto bad; + } + if (addr->sa_family != AF_INET6) { + error = EAFNOSUPPORT; + goto bad; + } + } + +#ifdef INET + if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { + int hasv4addr; + struct sockaddr_in6 *sin6 = 0; + + if (addr == 0) + hasv4addr = (inp->inp_vflag & INP_IPV4); + else { + sin6 = (struct sockaddr_in6 *)addr; + hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) + ? 1 : 0; + } + if (hasv4addr) { + struct pr_usrreqs *pru; + + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && + !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { + /* + * when remote addr is IPv4-mapped + * address, local addr should not be + * an IPv6 address; since you cannot + * determine how to map IPv6 source + * address to IPv4. + */ + error = EINVAL; + goto out; + } + if (sin6) + in6_sin6_2_sin_in_sock(addr); + pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; + error = ((*pru->pru_send)(so, flags, m, addr, control, + td)); + /* addr will just be freed in sendit(). */ + goto out; + } + } +#endif + + error = udp6_output(inp, m, addr, control, td); +out: + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); + return error; + + bad: + INP_UNLOCK(inp); + INP_INFO_WUNLOCK(&udbinfo); + 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_sosetlabel = in_pcbsosetlabel, + .pru_close = udp6_close +}; 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