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NetBSD/sys/netinet6/udp6_usrreq.c

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/* $NetBSD: udp6_usrreq.c,v 1.29 2000/06/05 06:38:23 itojun Exp $ */
/* $KAME: udp6_usrreq.c,v 1.52 2000/06/05 00:41:58 itojun 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.
* 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
*/
#include "opt_ipsec.h"
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet/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.
*/
struct in6pcb *udp6_last_in6pcb = &udb6;
#ifdef UDP6
static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, struct ifnet *));
#endif
static void udp6_detach __P((struct in6pcb *));
static void udp6_notify __P((struct in6pcb *, int));
void
udp6_init()
{
udb6.in6p_next = udb6.in6p_prev = &udb6;
}
#ifdef UDP6
static int
in6_mcmatch(in6p, ia6, ifp)
struct in6pcb *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 in6pcb *in6p;
struct mbuf *opts = 0;
int off = *offp;
u_int32_t 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) {
/* send icmp6 host unreach? */
m_freem(m);
return IPPROTO_DONE;
}
}
#endif
udp6stat.udp6s_ipackets++;
ip6 = mtod(m, struct ip6_hdr *);
/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
plen = m->m_pkthdr.len - off;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
uh = (struct udphdr *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
if (uh == NULL) {
udp6stat.udp6s_hdrops++;
return IPPROTO_DONE;
}
#endif
ulen = ntohs((u_short)uh->uh_ulen);
/*
* RFC2675 section 4: jumbograms will have 0 in the UDP header field,
* iff payload length > 0xffff.
*/
if (ulen == 0 && plen > 0xffff)
ulen = plen;
if (plen != ulen) {
udp6stat.udp6s_badlen++;
goto bad;
}
/* destination port of 0 is illegal, based on RFC768. */
if (uh->uh_dport == 0)
goto bad;
/* Be proactive about malicious use of IPv4 mapped address */
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
/* XXX stat */
goto bad;
}
/*
* Checksum extended UDP header and data.
*/
if (uh->uh_sum == 0)
udp6stat.udp6s_nosum++;
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
udp6stat.udp6s_badsum++;
goto bad;
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
struct in6pcb *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.
*/
bzero(&udp_in6, sizeof(udp_in6));
udp_in6.sin6_len = sizeof(struct sockaddr_in6);
udp_in6.sin6_family = AF_INET6;
udp_in6.sin6_port = uh->uh_sport;
udp_in6.sin6_addr = ip6->ip6_src;
if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr))
udp_in6.sin6_addr.s6_addr16[1] = 0;
if (m->m_pkthdr.rcvif) {
if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr)) {
udp_in6.sin6_scope_id =
m->m_pkthdr.rcvif->if_index;
} else
udp_in6.sin6_scope_id = 0;
} else
udp_in6.sin6_scope_id = 0;
/*
* 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;
for (in6p = udb6.in6p_next;
in6p != &udb6;
in6p = in6p->in6p_next) {
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 (ipsec6_in_reject(m, last)) {
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);
udp6stat.udp6s_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.)
*/
udp6stat.udp6s_noport++;
udp6stat.udp6s_noportmcast++;
goto bad;
}
#ifdef IPSEC
/*
* Check AH/ESP integrity.
*/
if (last != NULL && ipsec6_in_reject(m, last)) {
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) {
udp6stat.udp6s_fullsock++;
goto bad;
}
sorwakeup(last->in6p_socket);
return IPPROTO_DONE;
}
/*
* Locate pcb for datagram.
*/
in6p = udp6_last_in6pcb;
if (in6p->in6p_lport != uh->uh_dport ||
in6p->in6p_fport != uh->uh_sport ||
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src) ||
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) {
in6p = in6_pcblookup(&udb6,
&ip6->ip6_src, uh->uh_sport,
&ip6->ip6_dst, uh->uh_dport,
IN6PLOOKUP_WILDCARD);
if (in6p)
udp6_last_in6pcb = in6p;
udp6stat.udp6ps_pcbcachemiss++;
}
if (in6p == 0) {
udp6stat.udp6s_noport++;
if (m->m_flags & M_MCAST) {
printf("UDP6: M_MCAST is set in a unicast packet.\n");
udp6stat.udp6s_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(m, in6p)) {
ipsec6stat.in_polvio++;
goto bad;
}
#endif /*IPSEC*/
/*
* Construct sockaddr format source address.
* Stuff source address and datagram in user buffer.
*/
bzero(&udp_in6, sizeof(udp_in6));
udp_in6.sin6_len = sizeof(struct sockaddr_in6);
udp_in6.sin6_family = AF_INET6;
udp_in6.sin6_port = uh->uh_sport;
udp_in6.sin6_addr = ip6->ip6_src;
if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr))
udp_in6.sin6_addr.s6_addr16[1] = 0;
if (m->m_pkthdr.rcvif) {
if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr))
udp_in6.sin6_scope_id = m->m_pkthdr.rcvif->if_index;
else
udp_in6.sin6_scope_id = 0;
} else
udp_in6.sin6_scope_id = 0;
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) {
udp6stat.udp6s_fullsock++;
goto bad;
}
sorwakeup(in6p->in6p_socket);
return IPPROTO_DONE;
bad:
if (m)
m_freem(m);
if (opts)
m_freem(opts);
return IPPROTO_DONE;
}
#endif
/*
* Notify a udp user of an asynchronous error;
* just wake up so that he can collect error status.
*/
static void
udp6_notify(in6p, errno)
register struct in6pcb *in6p;
int errno;
{
in6p->in6p_socket->so_error = errno;
sorwakeup(in6p->in6p_socket);
sowwakeup(in6p->in6p_socket);
}
void
udp6_ctlinput(cmd, sa, d)
int cmd;
struct sockaddr *sa;
void *d;
{
register struct udphdr *uhp;
struct udphdr uh;
struct sockaddr_in6 sa6;
register struct ip6_hdr *ip6;
struct mbuf *m;
int off;
void (*notify) __P((struct in6pcb *, int)) = udp6_notify;
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) {
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) && m && m->m_pkthdr.rcvif)
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(&udb6, (struct sockaddr *)&sa6,
uhp->uh_dport, &s,
uhp->uh_sport, cmd, notify);
} else {
(void) in6_pcbnotify(&udb6, (struct sockaddr *)&sa6, 0,
&zeroin6_addr, 0, cmd, notify);
}
}
int
udp6_output(in6p, m, addr6, control, p)
register struct in6pcb *in6p;
register struct mbuf *m;
struct mbuf *addr6, *control;
struct proc *p;
{
register u_int32_t ulen = m->m_pkthdr.len;
u_int32_t plen = sizeof(struct udphdr) + ulen;
struct ip6_hdr *ip6;
struct udphdr *udp6;
struct in6_addr *laddr, *faddr;
u_short fport;
int error = 0;
struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts;
int priv;
int af, hlen;
#ifdef INET
struct ip *ip;
#endif
priv = 0;
if (p && !suser(p->p_ucred, &p->p_acflag))
priv = 1;
if (control) {
if ((error = ip6_setpktoptions(control, &opt, priv)) != 0)
goto release;
in6p->in6p_outputopts = &opt;
}
if (addr6) {
/*
* IPv4 version of udp_output calls in_pcbconnect in this case,
* which needs splnet and affects performance.
* 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.
*/
struct sockaddr_in6 *sin6 = mtod(addr6, struct sockaddr_in6 *);
if (addr6->m_len != sizeof(*sin6)) {
error = EINVAL;
goto release;
}
if (sin6->sin6_family != AF_INET6) {
error = EAFNOSUPPORT;
goto release;
}
if (sin6->sin6_port == 0) {
error = EADDRNOTAVAIL;
goto release;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = EISCONN;
goto release;
}
faddr = &sin6->sin6_addr;
fport = sin6->sin6_port; /* allow 0 port */
/*
* If the scope of the destination is link-local,
* embed the interface index in the address.
*
* XXX advanced-api value overrides sin6_scope_id
*/
if (IN6_IS_ADDR_LINKLOCAL(faddr) ||
IN6_IS_ADDR_MC_LINKLOCAL(faddr)) {
struct ip6_pktopts *optp = in6p->in6p_outputopts;
struct in6_pktinfo *pi = NULL;
struct ifnet *oifp = NULL;
struct ip6_moptions *mopt = NULL;
/*
* XXX Boundary check is assumed to be already done in
* ip6_setpktoptions().
*/
if (optp && (pi = optp->ip6po_pktinfo) &&
pi->ipi6_ifindex) {
faddr->s6_addr16[1] = htons(pi->ipi6_ifindex);
oifp = ifindex2ifnet[pi->ipi6_ifindex];
} else if (IN6_IS_ADDR_MULTICAST(faddr) &&
(mopt = in6p->in6p_moptions) &&
mopt->im6o_multicast_ifp) {
oifp = mopt->im6o_multicast_ifp;
faddr->s6_addr16[1] = htons(oifp->if_index);
} else if (sin6->sin6_scope_id) {
/* boundary check */
if (sin6->sin6_scope_id < 0
|| if_index < sin6->sin6_scope_id) {
error = ENXIO; /* XXX EINVAL? */
goto release;
}
/* XXX */
faddr->s6_addr16[1] =
htons(sin6->sin6_scope_id & 0xffff);
}
}
if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
laddr = in6_selectsrc(sin6, in6p->in6p_outputopts,
in6p->in6p_moptions,
&in6p->in6p_route,
&in6p->in6p_laddr, &error);
} else
laddr = &in6p->in6p_laddr; /*XXX*/
if (laddr == NULL) {
if (error == 0)
error = EADDRNOTAVAIL;
goto release;
}
if (in6p->in6p_lport == 0 &&
(error = in6_pcbsetport(laddr, in6p)) != 0)
goto release;
} else {
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = ENOTCONN;
goto release;
}
laddr = &in6p->in6p_laddr;
faddr = &in6p->in6p_faddr;
fport = in6p->in6p_fport;
}
if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
af = AF_INET6;
hlen = sizeof(struct ip6_hdr);
} else {
af = AF_INET;
hlen = sizeof(struct ip);
}
/*
* Calculate data length and get a mbuf
* for UDP and IP6 headers.
*/
M_PREPEND(m, hlen + sizeof(struct udphdr), M_DONTWAIT);
if (m == 0) {
error = ENOBUFS;
goto release;
}
/*
* Stuff checksum and output datagram.
*/
udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
udp6->uh_sport = in6p->in6p_lport; /* lport is always set in the PCB */
udp6->uh_dport = fport;
if (plen <= 0xffff)
udp6->uh_ulen = htons((u_short)plen);
else
udp6->uh_ulen = 0;
udp6->uh_sum = 0;
switch (af) {
case AF_INET6:
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
#if 0 /* ip6_plen will be filled in ip6_output. */
ip6->ip6_plen = htons((u_short)plen);
#endif
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 = *laddr;
ip6->ip6_dst = *faddr;
if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP,
sizeof(struct ip6_hdr), plen)) == 0) {
udp6->uh_sum = 0xffff;
}
udp6stat.udp6s_opackets++;
#ifdef IPSEC
ipsec_setsocket(m, in6p->in6p_socket);
#endif /*IPSEC*/
error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route,
0, in6p->in6p_moptions, NULL);
break;
case AF_INET:
#ifdef INET
/* can't transmit jumbogram over IPv4 */
if (plen > 0xffff) {
error = EMSGSIZE;
goto release;
}
ip = mtod(m, struct ip *);
ip->ip_len = plen;
ip->ip_p = IPPROTO_UDP;
ip->ip_ttl = in6p->in6p_hops; /*XXX*/
ip->ip_tos = 0; /*XXX*/
bcopy(&laddr->s6_addr[12], &ip->ip_src, sizeof(ip->ip_src));
bcopy(&faddr->s6_addr[12], &ip->ip_dst, sizeof(ip->ip_dst));
udp6->uh_sum = 0;
if ((udp6->uh_sum = in_cksum(m, ulen)) == 0)
udp6->uh_sum = 0xffff;
udpstat.udps_opackets++;
#ifdef IPSEC
ipsec_setsocket(m, NULL); /*XXX*/
#endif /*IPSEC*/
error = ip_output(m, NULL, &in6p->in6p_route, 0 /*XXX*/);
break;
#else
error = EAFNOSUPPORT;
goto release;
#endif
}
goto releaseopt;
release:
m_freem(m);
releaseopt:
if (control) {
in6p->in6p_outputopts = stickyopt;
m_freem(control);
}
return(error);
}
extern int udp6_sendspace;
extern int udp6_recvspace;
int
udp6_usrreq(so, req, m, addr6, control, p)
struct socket *so;
int req;
struct mbuf *m, *addr6, *control;
struct proc *p;
{
struct in6pcb *in6p = sotoin6pcb(so);
int error = 0;
int s;
/*
* MAPPED_ADDR implementation info:
* Mapped addr support for PRU_CONTROL is not necessary.
* Because typical user of PRU_CONTROL is such as ifconfig,
* and they don't associate any addr to their socket. Then
* socket family is only hint about the PRU_CONTROL'ed address
* family, especially when getting addrs from kernel.
* So AF_INET socket need to be used to control AF_INET addrs,
* and AF_INET6 socket for AF_INET6 addrs.
*/
if (req == PRU_CONTROL)
return(in6_control(so, (u_long)m, (caddr_t)addr6,
(struct ifnet *)control, p));
if (req == PRU_PURGEIF) {
in6_purgeif((struct ifnet *)control);
in6_pcbpurgeif(&udb6, (struct ifnet *)control);
return (0);
}
if (in6p == NULL && req != PRU_ATTACH) {
error = EINVAL;
goto release;
}
switch (req) {
case PRU_ATTACH:
/*
* MAPPED_ADDR implementation spec:
* Always attach for IPv6,
* and only when necessary for IPv4.
*/
if (in6p != NULL) {
error = EINVAL;
break;
}
s = splsoftnet();
error = in6_pcballoc(so, &udb6);
splx(s);
if (error)
break;
error = soreserve(so, udp6_sendspace, udp6_recvspace);
if (error)
break;
in6p = sotoin6pcb(so);
in6p->in6p_cksum = -1; /* just to be sure */
#ifdef IPSEC
error = ipsec_init_policy(so, &in6p->in6p_sp);
if (error != 0) {
in6_pcbdetach(in6p);
break;
}
#endif /*IPSEC*/
break;
case PRU_DETACH:
udp6_detach(in6p);
break;
case PRU_BIND:
s = splsoftnet();
error = in6_pcbbind(in6p, addr6, p);
splx(s);
break;
case PRU_LISTEN:
error = EOPNOTSUPP;
break;
case PRU_CONNECT:
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = EISCONN;
break;
}
s = splsoftnet();
error = in6_pcbconnect(in6p, addr6);
if (ip6_auto_flowlabel) {
in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
in6p->in6p_flowinfo |=
(htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
}
splx(s);
if (error == 0)
soisconnected(so);
break;
case PRU_CONNECT2:
error = EOPNOTSUPP;
break;
case PRU_ACCEPT:
error = EOPNOTSUPP;
break;
case PRU_DISCONNECT:
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = ENOTCONN;
break;
}
s = splsoftnet();
in6_pcbdisconnect(in6p);
bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr));
splx(s);
so->so_state &= ~SS_ISCONNECTED; /* XXX */
break;
case PRU_SHUTDOWN:
socantsendmore(so);
break;
case PRU_SEND:
return(udp6_output(in6p, m, addr6, control, p));
case PRU_ABORT:
soisdisconnected(so);
udp6_detach(in6p);
break;
case PRU_SOCKADDR:
in6_setsockaddr(in6p, addr6);
break;
case PRU_PEERADDR:
in6_setpeeraddr(in6p, addr6);
break;
case PRU_SENSE:
/*
* stat: don't bother with a blocksize
*/
return(0);
case PRU_SENDOOB:
case PRU_FASTTIMO:
case PRU_SLOWTIMO:
case PRU_PROTORCV:
case PRU_PROTOSEND:
error = EOPNOTSUPP;
break;
case PRU_RCVD:
case PRU_RCVOOB:
return(EOPNOTSUPP); /* do not free mbuf's */
default:
panic("udp6_usrreq");
}
release:
if (control) {
printf("udp control data unexpectedly retained\n");
m_freem(control);
}
if (m)
m_freem(m);
return(error);
}
static void
udp6_detach(in6p)
struct in6pcb *in6p;
{
int s = splsoftnet();
if (in6p == udp6_last_in6pcb)
udp6_last_in6pcb = &udb6;
in6_pcbdetach(in6p);
splx(s);
}
#include <vm/vm.h>
#include <sys/sysctl.h>
int
udp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return ENOTDIR;
switch (name[0]) {
case UDP6CTL_SENDSPACE:
return sysctl_int(oldp, oldlenp, newp, newlen,
&udp6_sendspace);
case UDP6CTL_RECVSPACE:
return sysctl_int(oldp, oldlenp, newp, newlen,
&udp6_recvspace);
default:
return ENOPROTOOPT;
}
/* NOTREACHED */
}
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