diff options
Diffstat (limited to 'sys/netinet6/udp6_usrreq.c')
| -rw-r--r-- | sys/netinet6/udp6_usrreq.c | 835 |
1 files changed, 835 insertions, 0 deletions
diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c new file mode 100644 index 000000000000..c22a719823b2 --- /dev/null +++ b/sys/netinet6/udp6_usrreq.c @@ -0,0 +1,835 @@ +/* + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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 + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sysctl.h> +#include <sys/errno.h> +#include <sys/stat.h> +#include <sys/systm.h> +#include <sys/syslog.h> +#include <sys/proc.h> + +#include <net/if.h> +#include <net/route.h> +#include <net/if_types.h> + +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/in_pcb.h> +#include <netinet/in_var.h> +#include <netinet/ip_var.h> +#include <netinet/udp.h> +#include <netinet/udp_var.h> +#include <netinet6/ip6.h> +#include <netinet6/ip6_var.h> +#include <netinet6/in6_pcb.h> +#include <netinet6/icmp6.h> +#include <netinet6/udp6_var.h> +#include <netinet6/ip6protosw.h> + +#ifdef IPSEC +#include <netinet6/ipsec.h> +#endif /*IPSEC*/ + +#include "faith.h" + +/* + * UDP protocol inplementation. + * Per RFC 768, August, 1980. + */ + +extern struct protosw inetsw[]; +static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *)); +static int udp6_detach __P((struct socket *so)); + +static int +in6_mcmatch(in6p, ia6, ifp) + struct inpcb *in6p; + register struct in6_addr *ia6; + struct ifnet *ifp; +{ + struct ip6_moptions *im6o = in6p->in6p_moptions; + struct in6_multi_mship *imm; + + if (im6o == NULL) + return 0; + + for (imm = im6o->im6o_memberships.lh_first; imm != NULL; + imm = imm->i6mm_chain.le_next) { + if ((ifp == NULL || + imm->i6mm_maddr->in6m_ifp == ifp) && + IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, + ia6)) + return 1; + } + return 0; +} + +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; + struct mbuf *opts = 0; + int off = *offp; + int plen, ulen; + struct sockaddr_in6 udp_in6; + +#if defined(NFAITH) && 0 < NFAITH + if (m->m_pkthdr.rcvif) { + if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { + /* XXX send icmp6 host/port unreach? */ + m_freem(m); + return IPPROTO_DONE; + } + } +#endif + udpstat.udps_ipackets++; + + IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); + + ip6 = mtod(m, struct ip6_hdr *); + plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); + uh = (struct udphdr *)((caddr_t)ip6 + off); + 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++; + else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { + udpstat.udps_badsum++; + goto bad; + } + + 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. + */ + + /* + * Construct sockaddr format source address. + */ + init_sin6(&udp_in6, m); /* general init */ + udp_in6.sin6_port = uh->uh_sport; + /* + * KAME note: usually we drop udphdr from mbuf here. + * We need udphdr for IPsec processing so we do that later. + */ + + /* + * Locate pcb(s) for datagram. + * (Algorithm copied from raw_intr().) + */ + last = NULL; + LIST_FOREACH(in6p, &udb, inp_list) { + if ((in6p->inp_vflag & INP_IPV6) == NULL) + 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) && + !in6_mcmatch(in6p, &ip6->ip6_dst, + m->m_pkthdr.rcvif)) + 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; + +#ifdef IPSEC + /* + * Check AH/ESP integrity. + */ + if (last != NULL && + ipsec6_in_reject_so(m, last->inp_socket)) { + ipsec6stat.in_polvio++; + /* do not inject data into pcb */ + } else +#endif /*IPSEC*/ + if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { + /* + * KAME NOTE: do not + * m_copy(m, offset, ...) above. + * sbappendaddr() expects M_PKTHDR, + * and m_copy() will copy M_PKTHDR + * only if offset is 0. + */ + if (last->in6p_flags & IN6P_CONTROLOPTS + || last->in6p_socket->so_options & SO_TIMESTAMP) + ip6_savecontrol(last, &opts, + ip6, n); + m_adj(n, off + sizeof(struct udphdr)); + if (sbappendaddr(&last->in6p_socket->so_rcv, + (struct sockaddr *)&udp_in6, + n, opts) == 0) { + m_freem(n); + if (opts) + m_freem(opts); + udpstat.udps_fullsock++; + } else + sorwakeup(last->in6p_socket); + opts = 0; + } + } + 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; + } +#ifdef IPSEC + /* + * Check AH/ESP integrity. + */ + if (last != NULL && ipsec6_in_reject_so(m, last->inp_socket)) { + ipsec6stat.in_polvio++; + goto bad; + } +#endif /*IPSEC*/ + if (last->in6p_flags & IN6P_CONTROLOPTS + || last->in6p_socket->so_options & SO_TIMESTAMP) + ip6_savecontrol(last, &opts, ip6, m); + + m_adj(m, off + sizeof(struct udphdr)); + if (sbappendaddr(&last->in6p_socket->so_rcv, + (struct sockaddr *)&udp_in6, + m, opts) == 0) { + udpstat.udps_fullsock++; + goto bad; + } + sorwakeup(last->in6p_socket); + 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 == 0) { + if (log_in_vain) { + char buf[INET6_ADDRSTRLEN]; + + strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); + log(LOG_INFO, + "Connection attempt to UDP %s:%d from %s:%d\n", + buf, ntohs(uh->uh_dport), + ip6_sprintf(&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; + } + icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); + return IPPROTO_DONE; + } +#ifdef IPSEC + /* + * Check AH/ESP integrity. + */ + if (in6p != NULL && ipsec6_in_reject_so(m, in6p->in6p_socket)) { + ipsec6stat.in_polvio++; + goto bad; + } +#endif /*IPSEC*/ + + /* + * Construct sockaddr format source address. + * Stuff source address and datagram in user buffer. + */ + init_sin6(&udp_in6, m); /* general init */ + udp_in6.sin6_port = uh->uh_sport; + if (in6p->in6p_flags & IN6P_CONTROLOPTS + || in6p->in6p_socket->so_options & SO_TIMESTAMP) + ip6_savecontrol(in6p, &opts, ip6, m); + m_adj(m, off + sizeof(struct udphdr)); + if (sbappendaddr(&in6p->in6p_socket->so_rcv, + (struct sockaddr *)&udp_in6, + m, opts) == 0) { + udpstat.udps_fullsock++; + goto bad; + } + sorwakeup(in6p->in6p_socket); + return IPPROTO_DONE; +bad: + if (m) + m_freem(m); + if (opts) + m_freem(opts); + return IPPROTO_DONE; +} + +void +udp6_ctlinput(cmd, sa, d) + int cmd; + struct sockaddr *sa; + void *d; +{ + register struct udphdr *uhp; + struct udphdr uh; + struct sockaddr_in6 sa6; + struct ip6_hdr *ip6; + struct mbuf *m; + int off; + + if (sa->sa_family != AF_INET6 || + sa->sa_len != sizeof(struct sockaddr_in6)) + return; + + if (!PRC_IS_REDIRECT(cmd) && + ((unsigned)cmd >= PRC_NCMDS || inet6ctlerrmap[cmd] == 0)) + return; + + /* if the parameter is from icmp6, decode it. */ + if (d != NULL) { + struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d; + m = ip6cp->ip6c_m; + ip6 = ip6cp->ip6c_ip6; + off = ip6cp->ip6c_off; + } else { + m = NULL; + ip6 = NULL; + } + + /* translate addresses into internal form */ + sa6 = *(struct sockaddr_in6 *)sa; + if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr)) + sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); + + if (ip6) { + /* + * XXX: We assume that when IPV6 is non NULL, + * M and OFF are valid. + */ + struct in6_addr s; + + /* translate addresses into internal form */ + memcpy(&s, &ip6->ip6_src, sizeof(s)); + if (IN6_IS_ADDR_LINKLOCAL(&s)) + s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); + + if (m->m_len < off + sizeof(uh)) { + /* + * this should be rare case, + * so we compromise on this copy... + */ + m_copydata(m, off, sizeof(uh), (caddr_t)&uh); + uhp = &uh; + } else + uhp = (struct udphdr *)(mtod(m, caddr_t) + off); + (void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6, + uhp->uh_dport, &s, + uhp->uh_sport, cmd, udp_notify); + } else + (void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6, 0, + &zeroin6_addr, 0, cmd, udp_notify); +} + +static int +udp6_getcred SYSCTL_HANDLER_ARGS +{ + struct sockaddr_in6 addrs[2]; + struct inpcb *inp; + int error, s; + + error = suser(req->p); + if (error) + return (error); + error = SYSCTL_IN(req, addrs, sizeof(addrs)); + if (error) + return (error); + s = splnet(); + 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 || !inp->inp_socket || !inp->inp_socket->so_cred) { + error = ENOENT; + goto out; + } + error = SYSCTL_OUT(req, inp->inp_socket->so_cred, + sizeof(struct ucred)); + +out: + splx(s); + return (error); +} + +SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, + 0, 0, + udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); + +int +udp6_output(in6p, m, addr6, control, p) + register struct inpcb *in6p; + register struct mbuf *m; + struct sockaddr *addr6; + struct mbuf *control; + struct proc *p; +{ + register int ulen = m->m_pkthdr.len; + int plen = sizeof(struct udphdr) + ulen; + struct ip6_hdr *ip6; + struct udphdr *udp6; + struct in6_addr laddr6; + int s = 0, error = 0; + struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts; + + if (control) { + if ((error = ip6_setpktoptions(control, &opt, suser(p))) != 0) + goto release; + in6p->in6p_outputopts = &opt; + } + + if (addr6) { + laddr6 = in6p->in6p_laddr; + if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { + error = EISCONN; + goto release; + } + /* + * Must block input while temporarily connected. + */ + s = splnet(); + /* + * XXX: the user might want to overwrite the local address + * via an ancillary data. + */ + bzero(&in6p->in6p_laddr, sizeof(struct in6_addr)); + error = in6_pcbconnect(in6p, addr6, p); + if (error) { + splx(s); + goto release; + } + } else { + if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { + error = ENOTCONN; + goto release; + } + } + /* + * Calculate data length and get a mbuf + * for UDP and IP6 headers. + */ + M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr), + M_DONTWAIT); + if (m == 0) { + error = ENOBUFS; + if (addr6) + splx(s); + goto release; + } + + /* + * Stuff checksum and output datagram. + */ + ip6 = mtod(m, struct ip6_hdr *); + ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; + ip6->ip6_vfc = IPV6_VERSION; + /* ip6_plen will be filled in ip6_output. */ + ip6->ip6_nxt = IPPROTO_UDP; + ip6->ip6_hlim = in6_selecthlim(in6p, + in6p->in6p_route.ro_rt ? + in6p->in6p_route.ro_rt->rt_ifp : + NULL); + ip6->ip6_src = in6p->in6p_laddr; + ip6->ip6_dst = in6p->in6p_faddr; + + udp6 = (struct udphdr *)(ip6 + 1); + udp6->uh_sport = in6p->in6p_lport; + udp6->uh_dport = in6p->in6p_fport; + udp6->uh_ulen = htons((u_short)plen); + udp6->uh_sum = 0; + + if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP, + sizeof(struct ip6_hdr), plen)) == 0) { + udp6->uh_sum = 0xffff; + } + + udpstat.udps_opackets++; + +#ifdef IPSEC + m->m_pkthdr.rcvif = (struct ifnet *)in6p->in6p_socket; +#endif /*IPSEC*/ + error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route, + 0, in6p->in6p_moptions, NULL); + + if (addr6) { + in6_pcbdisconnect(in6p); + in6p->in6p_laddr = laddr6; + splx(s); + } + goto releaseopt; + +release: + m_freem(m); + +releaseopt: + if (control) { + in6p->in6p_outputopts = stickyopt; + m_freem(control); + } + return(error); +} + +static int +udp6_abort(struct socket *so) +{ + struct inpcb *inp; + int s; + + inp = sotoinpcb(so); + if (inp == 0) + return EINVAL; /* ??? possible? panic instead? */ + soisdisconnected(so); + s = splnet(); + in6_pcbdetach(inp); + splx(s); + return 0; +} + +static int +udp6_attach(struct socket *so, int proto, struct proc *p) +{ + struct inpcb *inp; + int s, error; + + inp = sotoinpcb(so); + if (inp != 0) + return EINVAL; + + if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { + error = soreserve(so, udp_sendspace, udp_recvspace); + if (error) + return error; + } + s = splnet(); + error = in_pcballoc(so, &udbinfo, p); + splx(s); + if (error) + return error; + inp = (struct inpcb *)so->so_pcb; + inp->inp_vflag |= INP_IPV6; + inp->in6p_hops = -1; /* use kernel default */ + inp->in6p_cksum = -1; /* just to be sure */ +#ifdef IPSEC + error = ipsec_init_policy(so, &inp->in6p_sp); + if (error != 0) { + in6_pcbdetach(inp); + return (error); + } +#endif /*IPSEC*/ + return 0; +} + +static int +udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) +{ + struct inpcb *inp; + int s, error; + + inp = sotoinpcb(so); + if (inp == 0) + return EINVAL; + + inp->inp_vflag &= ~INP_IPV4; + inp->inp_vflag |= INP_IPV6; + if (ip6_mapped_addr_on && (inp->inp_flags & IN6P_BINDV6ONLY) == NULL) { + 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; + s = splnet(); + error = in_pcbbind(inp, (struct sockaddr *)&sin, p); + splx(s); + return error; + } + } + + s = splnet(); + error = in6_pcbbind(inp, nam, p); + splx(s); + return error; +} + +static int +udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) +{ + struct inpcb *inp; + int s, error; + + inp = sotoinpcb(so); + if (inp == 0) + return EINVAL; + + if (ip6_mapped_addr_on) { + 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) + return EISCONN; + in6_sin6_2_sin(&sin, sin6_p); + s = splnet(); + error = in_pcbconnect(inp, (struct sockaddr *)&sin, p); + splx(s); + if (error == NULL) { + inp->inp_vflag |= INP_IPV4; + inp->inp_vflag &= ~INP_IPV6; + soisconnected(so); + } + return error; + } + } + + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) + return EISCONN; + s = splnet(); + error = in6_pcbconnect(inp, nam, p); + if (ip6_auto_flowlabel) { + inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; + inp->in6p_flowinfo |= + (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); + } + splx(s); + if (error == NULL) { + if (ip6_mapped_addr_on) { /* should be non mapped addr */ + inp->inp_vflag &= ~INP_IPV4; + inp->inp_vflag |= INP_IPV6; + } + soisconnected(so); + } + return error; +} + +static int +udp6_detach(struct socket *so) +{ + struct inpcb *inp; + int s; + + inp = sotoinpcb(so); + if (inp == 0) + return EINVAL; + s = splnet(); + in6_pcbdetach(inp); + splx(s); + return 0; +} + +static int +udp6_disconnect(struct socket *so) +{ + struct inpcb *inp; + int s; + + inp = sotoinpcb(so); + if (inp == 0) + return EINVAL; + + if (inp->inp_vflag & INP_IPV4) { + struct pr_usrreqs *pru; + + pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; + return ((*pru->pru_disconnect)(so)); + } + + if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) + return ENOTCONN; + + s = splnet(); + in6_pcbdisconnect(inp); + inp->in6p_laddr = in6addr_any; + splx(s); + so->so_state &= ~SS_ISCONNECTED; /* XXX */ + return 0; +} + +static int +udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct proc *p) +{ + struct inpcb *inp; + + inp = sotoinpcb(so); + if (inp == 0) { + m_freem(m); + return EINVAL; + } + + if (ip6_mapped_addr_on) { + 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; + int error; + + 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, + p)); + /* addr will just be freed in sendit(). */ + return error; + } + } + + return udp6_output(inp, m, addr, control, p); +} + +struct pr_usrreqs udp6_usrreqs = { + udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, + pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, + pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, + pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, + in6_mapped_sockaddr, sosend, soreceive, sopoll +}; |