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NetBSD/sys/netinet6/raw_ip6.c

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/* $NetBSD: raw_ip6.c,v 1.39 2001/11/13 00:57:06 lukem Exp $ */
/* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 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, 1988, 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.
*
* @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: raw_ip6.c,v 1.39 2001/11/13 00:57:06 lukem Exp $");
#include "opt_ipsec.h"
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.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_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet/icmp6.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/nd6.h>
#include <netinet6/ip6protosw.h>
#ifdef ENABLE_DEFAULT_SCOPE
#include <netinet6/scope6_var.h>
#endif
#include <netinet6/raw_ip6.h>
#ifdef IPSEC
#include <netinet6/ipsec.h>
#endif /* IPSEC */
#include <machine/stdarg.h>
#include "faith.h"
#if defined(NFAITH) && 0 < NFAITH
#include <net/if_faith.h>
#endif
struct in6pcb rawin6pcb;
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
/*
* Raw interface to IP6 protocol.
*/
struct rip6stat rip6stat;
/*
* Initialize raw connection block queue.
*/
void
rip6_init()
{
rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb;
}
/*
* Setup generic address and protocol structures
* for raw_input routine, then pass them along with
* mbuf chain.
*/
int
rip6_input(mp, offp, proto)
struct mbuf **mp;
int *offp, proto;
{
struct mbuf *m = *mp;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
struct in6pcb *in6p;
struct in6pcb *last = NULL;
struct sockaddr_in6 rip6src;
struct mbuf *opts = NULL;
rip6stat.rip6s_ipackets++;
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
/* send icmp6 host unreach? */
m_freem(m);
return IPPROTO_DONE;
}
#endif
/* 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 */
m_freem(m);
return IPPROTO_DONE;
}
bzero(&rip6src, sizeof(rip6src));
rip6src.sin6_len = sizeof(struct sockaddr_in6);
rip6src.sin6_family = AF_INET6;
#if 0 /* XXX inbound flowlabel */
rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK;
#endif
/* KAME hack: recover scopeid */
(void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif);
for (in6p = rawin6pcb.in6p_next;
in6p != &rawin6pcb; in6p = in6p->in6p_next)
{
if (in6p->in6p_ip6.ip6_nxt &&
in6p->in6p_ip6.ip6_nxt != proto)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
continue;
if (in6p->in6p_cksum != -1) {
rip6stat.rip6s_isum++;
if (in6_cksum(m, ip6->ip6_nxt, *offp,
m->m_pkthdr.len - *offp)) {
rip6stat.rip6s_badsum++;
continue;
}
}
if (last) {
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, (int)M_COPYALL)) != NULL) {
if (last->in6p_flags & IN6P_CONTROLOPTS)
ip6_savecontrol(last, &opts, ip6, n);
/* strip intermediate headers */
m_adj(n, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src,
n, opts) == 0) {
/* should notify about lost packet */
m_freem(n);
if (opts)
m_freem(opts);
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
opts = NULL;
}
}
last = in6p;
}
#ifdef IPSEC
/*
* Check AH/ESP integrity.
*/
if (last && ipsec6_in_reject(m, last)) {
m_freem(m);
ipsec6stat.in_polvio++;
ip6stat.ip6s_delivered--;
/* do not inject data into pcb */
} else
#endif /* IPSEC */
if (last) {
if (last->in6p_flags & IN6P_CONTROLOPTS)
ip6_savecontrol(last, &opts, ip6, m);
/* strip intermediate headers */
m_adj(m, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src, m, opts) == 0) {
m_freem(m);
if (opts)
m_freem(opts);
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
} else {
rip6stat.rip6s_nosock++;
if (m->m_flags & M_MCAST)
rip6stat.rip6s_nosockmcast++;
if (proto == IPPROTO_NONE)
m_freem(m);
else {
char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_NEXTHEADER,
prvnxtp - mtod(m, char *));
}
ip6stat.ip6s_delivered--;
}
return IPPROTO_DONE;
}
void
rip6_ctlinput(cmd, sa, d)
int cmd;
struct sockaddr *sa;
void *d;
{
struct ip6_hdr *ip6;
struct mbuf *m;
int off;
struct ip6ctlparam *ip6cp = NULL;
const struct sockaddr_in6 *sa6_src = NULL;
void *cmdarg;
void (*notify) __P((struct in6pcb *, int)) = in6_rtchange;
int nxt;
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 (cmd == PRC_MSGSIZE)
; /* special code is present, see below */
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;
nxt = ip6cp->ip6c_nxt;
} else {
m = NULL;
ip6 = NULL;
cmdarg = NULL;
sa6_src = &sa6_any;
nxt = -1;
}
if (ip6 && cmd == PRC_MSGSIZE) {
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
int valid = 0;
struct in6pcb *in6p;
/*
* Check to see if we have a valid raw IPv6 socket
* corresponding to the address in the ICMPv6 message
* payload, and the protocol (ip6_nxt) meets the socket.
* XXX chase extension headers, or pass final nxt value
* from icmp6_notify_error()
*/
in6p = NULL;
in6p = in6_pcblookup_connect(&rawin6pcb,
&sa6->sin6_addr, 0,
(struct in6_addr *)&sa6_src->sin6_addr, 0, 0);
#if 0
if (!in6p) {
/*
* As the use of sendto(2) is fairly popular,
* we may want to allow non-connected pcb too.
* But it could be too weak against attacks...
* We should at least check if the local
* address (= s) is really ours.
*/
in6p = in6_pcblookup_bind(&rawin6pcb,
&sa6->sin6_addr, 0, 0))
}
#endif
if (in6p && in6p->in6p_ip6.ip6_nxt &&
in6p->in6p_ip6.ip6_nxt == nxt)
valid++;
/*
* Depending on the value of "valid" and routing table
* size (mtudisc_{hi,lo}wat), we will:
* - recalcurate the new MTU and create the
* corresponding routing entry, or
* - ignore the MTU change notification.
*/
icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
/*
* regardless of if we called icmp6_mtudisc_update(),
* we need to call in6_pcbnotify(), to notify path
* MTU change to the userland (2292bis-02), because
* some unconnected sockets may share the same
* destination and want to know the path MTU.
*/
}
(void) in6_pcbnotify(&rawin6pcb, sa, 0,
(struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
}
/*
* Generate IPv6 header and pass packet to ip6_output.
* Tack on options user may have setup with control call.
*/
int
#if __STDC__
rip6_output(struct mbuf *m, ...)
#else
rip6_output(m, va_alist)
struct mbuf *m;
va_dcl
#endif
{
struct socket *so;
struct sockaddr_in6 *dstsock;
struct mbuf *control;
struct in6_addr *dst;
struct ip6_hdr *ip6;
struct in6pcb *in6p;
u_int plen = m->m_pkthdr.len;
int error = 0;
struct ip6_pktopts opt, *optp = NULL, *origoptp;
struct ifnet *oifp = NULL;
int type, code; /* for ICMPv6 output statistics only */
int priv = 0;
va_list ap;
int flags;
va_start(ap, m);
so = va_arg(ap, struct socket *);
dstsock = va_arg(ap, struct sockaddr_in6 *);
control = va_arg(ap, struct mbuf *);
va_end(ap);
in6p = sotoin6pcb(so);
priv = 0;
{
struct proc *p = curproc; /* XXX */
if (p && !suser(p->p_ucred, &p->p_acflag))
priv = 1;
}
dst = &dstsock->sin6_addr;
if (control) {
if ((error = ip6_setpktoptions(control, &opt, priv)) != 0)
goto bad;
optp = &opt;
} else
optp = in6p->in6p_outputopts;
/*
* For an ICMPv6 packet, we should know its type and code
* to update statistics.
*/
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
struct icmp6_hdr *icmp6;
if (m->m_len < sizeof(struct icmp6_hdr) &&
(m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
error = ENOBUFS;
goto bad;
}
icmp6 = mtod(m, struct icmp6_hdr *);
type = icmp6->icmp6_type;
code = icmp6->icmp6_code;
}
M_PREPEND(m, sizeof(*ip6), M_WAIT);
ip6 = mtod(m, struct ip6_hdr *);
/*
* Next header might not be ICMP6 but use its pseudo header anyway.
*/
ip6->ip6_dst = *dst;
/* KAME hack: embed scopeid */
origoptp = in6p->in6p_outputopts;
in6p->in6p_outputopts = optp;
if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) {
error = EINVAL;
goto bad;
}
in6p->in6p_outputopts = origoptp;
/*
* Source address selection.
*/
{
struct in6_addr *in6a;
if ((in6a = in6_selectsrc(dstsock, optp,
in6p->in6p_moptions,
&in6p->in6p_route,
&in6p->in6p_laddr,
&error)) == 0) {
if (error == 0)
error = EADDRNOTAVAIL;
goto bad;
}
ip6->ip6_src = *in6a;
if (in6p->in6p_route.ro_rt) {
/* what if oifp contradicts ? */
oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
}
}
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 = in6p->in6p_ip6.ip6_nxt;
ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
in6p->in6p_cksum != -1) {
int off;
u_int16_t sum;
#define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */
/* compute checksum */
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
off = offsetof(struct icmp6_hdr, icmp6_cksum);
else
off = in6p->in6p_cksum;
if (plen < off + 1) {
error = EINVAL;
goto bad;
}
off += sizeof(struct ip6_hdr);
sum = 0;
m_copyback(m, off, sizeof(sum), (caddr_t)&sum);
sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
m_copyback(m, off, sizeof(sum), (caddr_t)&sum);
}
#ifdef IPSEC
if (ipsec_setsocket(m, so) != 0) {
error = ENOBUFS;
goto bad;
}
#endif /* IPSEC */
flags = 0;
#ifdef IPV6_MINMTU
if (in6p->in6p_flags & IN6P_MINMTU)
flags |= IPV6_MINMTU;
#endif
error = ip6_output(m, optp, &in6p->in6p_route, flags,
in6p->in6p_moptions, &oifp);
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
if (oifp)
icmp6_ifoutstat_inc(oifp, type, code);
icmp6stat.icp6s_outhist[type]++;
} else
rip6stat.rip6s_opackets++;
goto freectl;
bad:
if (m)
m_freem(m);
freectl:
if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
RTFREE(optp->ip6po_route.ro_rt);
if (control)
m_freem(control);
return(error);
}
/*
* Raw IPv6 socket option processing.
*/
int
rip6_ctloutput(op, so, level, optname, mp)
int op;
struct socket *so;
int level, optname;
struct mbuf **mp;
{
int error = 0;
int optval;
struct in6pcb *in6p;
struct mbuf *m;
const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum);
switch (level) {
case IPPROTO_IPV6:
switch (optname) {
case MRT6_INIT:
case MRT6_DONE:
case MRT6_ADD_MIF:
case MRT6_DEL_MIF:
case MRT6_ADD_MFC:
case MRT6_DEL_MFC:
case MRT6_PIM:
if (op == PRCO_SETOPT) {
error = ip6_mrouter_set(optname, so, *mp);
if (*mp)
(void)m_free(*mp);
} else if (op == PRCO_GETOPT)
error = ip6_mrouter_get(optname, so, mp);
else
error = EINVAL;
return (error);
case IPV6_CHECKSUM:
/*
* for ICMPv6 sockets, no modification allowed for
* checksum offset, permit "no change" values to
* help existing apps.
*/
in6p = sotoin6pcb(so);
error = 0;
if (op == PRCO_SETOPT) {
m = *mp;
if (m && m->m_len == sizeof(int)) {
optval = *mtod(m, int *);
if (so->so_proto->pr_protocol ==
IPPROTO_ICMPV6) {
if (optval != icmp6off)
error = EINVAL;
} else
in6p->in6p_cksum = optval;
} else
error = EINVAL;
if (m)
m_free(m);
} else if (op == PRCO_GETOPT) {
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
optval = icmp6off;
else
optval = in6p->in6p_cksum;
*mp = m = m_get(M_WAIT, MT_SOOPTS);
m->m_len = sizeof(int);
*mtod(m, int *) = optval;
} else
error = EINVAL;
return error;
default:
return (ip6_ctloutput(op, so, level, optname, mp));
}
case IPPROTO_ICMPV6:
/*
* XXX: is it better to call icmp6_ctloutput() directly
* from protosw?
*/
return(icmp6_ctloutput(op, so, level, optname, mp));
default:
if (op == PRCO_SETOPT && *mp)
m_free(*mp);
return EINVAL;
}
}
extern u_long rip6_sendspace;
extern u_long rip6_recvspace;
int
rip6_usrreq(so, req, m, nam, control, p)
struct socket *so;
int req;
struct mbuf *m, *nam, *control;
struct proc *p;
{
struct in6pcb *in6p = sotoin6pcb(so);
int s;
int error = 0;
/* extern struct socket *ip6_mrouter; */ /* xxx */
int priv;
priv = 0;
if (p && !suser(p->p_ucred, &p->p_acflag))
priv++;
if (req == PRU_CONTROL)
return (in6_control(so, (u_long)m, (caddr_t)nam,
(struct ifnet *)control, p));
if (req == PRU_PURGEIF) {
in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control);
in6_purgeif((struct ifnet *)control);
in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control);
return (0);
}
switch (req) {
case PRU_ATTACH:
if (in6p)
panic("rip6_attach");
if (!priv) {
error = EACCES;
break;
}
s = splsoftnet();
if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) {
splx(s);
break;
}
if ((error = in6_pcballoc(so, &rawin6pcb)) != 0)
{
splx(s);
break;
}
splx(s);
in6p = sotoin6pcb(so);
in6p->in6p_ip6.ip6_nxt = (long)nam;
in6p->in6p_cksum = -1;
MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *,
sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
if (in6p->in6p_icmp6filt == NULL) {
in6_pcbdetach(in6p);
error = ENOMEM;
break;
}
ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt);
break;
case PRU_DISCONNECT:
if ((so->so_state & SS_ISCONNECTED) == 0) {
error = ENOTCONN;
break;
}
in6p->in6p_faddr = in6addr_any;
so->so_state &= ~SS_ISCONNECTED; /* XXX */
break;
case PRU_ABORT:
soisdisconnected(so);
/* Fallthrough */
case PRU_DETACH:
if (in6p == 0)
panic("rip6_detach");
if (so == ip6_mrouter)
ip6_mrouter_done();
/* xxx: RSVP */
if (in6p->in6p_icmp6filt) {
FREE(in6p->in6p_icmp6filt, M_PCB);
in6p->in6p_icmp6filt = NULL;
}
in6_pcbdetach(in6p);
break;
case PRU_BIND:
{
struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *);
struct ifaddr *ia = NULL;
if (nam->m_len != sizeof(*addr)) {
error = EINVAL;
break;
}
if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) {
error = EADDRNOTAVAIL;
break;
}
#ifdef ENABLE_DEFAULT_SCOPE
if (addr->sin6_scope_id == 0) /* not change if specified */
addr->sin6_scope_id =
scope6_addr2default(&addr->sin6_addr);
#endif
/* KAME hack: embed scopeid */
if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0)
return EINVAL;
#ifndef SCOPEDROUTING
addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */
#endif
/*
* we don't support mapped address here, it would confuse
* users so reject it
*/
if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
error = EADDRNOTAVAIL;
break;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
(ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) {
error = EADDRNOTAVAIL;
break;
}
if (ia &&
((struct in6_ifaddr *)ia)->ia6_flags &
(IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
error = EADDRNOTAVAIL;
break;
}
in6p->in6p_laddr = addr->sin6_addr;
break;
}
case PRU_CONNECT:
{
struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *);
struct in6_addr *in6a = NULL;
#ifdef ENABLE_DEFAULT_SCOPE
struct sockaddr_in6 sin6;
#endif
if (nam->m_len != sizeof(*addr)) {
error = EINVAL;
break;
}
if (ifnet.tqh_first == 0)
{
error = EADDRNOTAVAIL;
break;
}
if (addr->sin6_family != AF_INET6) {
error = EAFNOSUPPORT;
break;
}
#ifdef ENABLE_DEFAULT_SCOPE
if (addr->sin6_scope_id == 0) {
/* protect *addr */
sin6 = *addr;
addr = &sin6;
addr->sin6_scope_id =
scope6_addr2default(&addr->sin6_addr);
}
#endif
/* Source address selection. XXX: need pcblookup? */
in6a = in6_selectsrc(addr, in6p->in6p_outputopts,
in6p->in6p_moptions,
&in6p->in6p_route,
&in6p->in6p_laddr,
&error);
if (in6a == NULL) {
if (error == 0)
error = EADDRNOTAVAIL;
break;
}
in6p->in6p_laddr = *in6a;
in6p->in6p_faddr = addr->sin6_addr;
soisconnected(so);
break;
}
case PRU_CONNECT2:
error = EOPNOTSUPP;
break;
/*
* Mark the connection as being incapable of futther input.
*/
case PRU_SHUTDOWN:
socantsendmore(so);
break;
/*
* Ship a packet out. The appropriate raw output
* routine handles any messaging necessary.
*/
case PRU_SEND:
{
struct sockaddr_in6 tmp;
struct sockaddr_in6 *dst;
/* always copy sockaddr to avoid overwrites */
if (so->so_state & SS_ISCONNECTED) {
if (nam) {
error = EISCONN;
break;
}
/* XXX */
bzero(&tmp, sizeof(tmp));
tmp.sin6_family = AF_INET6;
tmp.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&in6p->in6p_faddr, &tmp.sin6_addr,
sizeof(struct in6_addr));
dst = &tmp;
} else {
if (nam == NULL) {
error = ENOTCONN;
break;
}
tmp = *mtod(nam, struct sockaddr_in6 *);
dst = &tmp;
}
#ifdef ENABLE_DEFAULT_SCOPE
if (dst->sin6_scope_id == 0) {
dst->sin6_scope_id =
scope6_addr2default(&dst->sin6_addr);
}
#endif
error = rip6_output(m, so, dst, control);
m = NULL;
break;
}
case PRU_SENSE:
/*
* stat: don't bother with a blocksize
*/
return(0);
/*
* Not supported.
*/
case PRU_RCVOOB:
case PRU_RCVD:
case PRU_LISTEN:
case PRU_ACCEPT:
case PRU_SENDOOB:
error = EOPNOTSUPP;
break;
case PRU_SOCKADDR:
in6_setsockaddr(in6p, nam);
break;
case PRU_PEERADDR:
in6_setpeeraddr(in6p, nam);
break;
default:
panic("rip6_usrreq");
}
if (m != NULL)
m_freem(m);
return(error);
}
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