924 lines
23 KiB
C
924 lines
23 KiB
C
/* $NetBSD: raw_ip6.c,v 1.83 2007/02/22 09:30:33 dyoung 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. 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 1.83 2007/02/22 09:30:33 dyoung Exp $");
|
|
|
|
#include "opt_ipsec.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/sysctl.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 <sys/kauth.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>
|
|
#include <netinet6/scope6_var.h>
|
|
#include <netinet6/raw_ip6.h>
|
|
|
|
#ifdef IPSEC
|
|
#include <netinet6/ipsec.h>
|
|
#endif /* IPSEC */
|
|
|
|
#ifdef FAST_IPSEC
|
|
#include <netipsec/ipsec.h>
|
|
#include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */
|
|
#include <netipsec/ipsec6.h>
|
|
#endif
|
|
|
|
#include <machine/stdarg.h>
|
|
|
|
#include "faith.h"
|
|
#if defined(NFAITH) && 0 < NFAITH
|
|
#include <net/if_faith.h>
|
|
#endif
|
|
|
|
extern struct inpcbtable rawcbtable;
|
|
struct inpcbtable raw6cbtable;
|
|
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
|
|
|
|
/*
|
|
* Raw interface to IP6 protocol.
|
|
*/
|
|
|
|
struct rip6stat rip6stat;
|
|
|
|
/*
|
|
* Initialize raw connection block queue.
|
|
*/
|
|
void
|
|
rip6_init()
|
|
{
|
|
|
|
in6_pcbinit(&raw6cbtable, 1, 1);
|
|
}
|
|
|
|
/*
|
|
* 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 inpcb_hdr *inph;
|
|
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;
|
|
rip6src.sin6_addr = ip6->ip6_src;
|
|
if (sa6_recoverscope(&rip6src) != 0) {
|
|
/* XXX: should be impossible. */
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
CIRCLEQ_FOREACH(inph, &raw6cbtable.inpt_queue, inph_queue) {
|
|
in6p = (struct in6pcb *)inph;
|
|
if (in6p->in6p_af != AF_INET6)
|
|
continue;
|
|
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, proto, *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 */
|
|
#ifdef FAST_IPSEC
|
|
/*
|
|
* Check AH/ESP integrity
|
|
*/
|
|
if (!ipsec6_in_reject(m,last))
|
|
#endif /* FAST_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 */
|
|
#ifdef FAST_IPSEC
|
|
if (last && ipsec6_in_reject(m, last)) {
|
|
m_freem(m);
|
|
/*
|
|
* XXX ipsec6_in_reject update stat if there is an error
|
|
* so we just need to update stats by hand in the case of last is
|
|
* NULL
|
|
*/
|
|
if (!last)
|
|
ipsec6stat.in_polvio++;
|
|
ip6stat.ip6s_delivered--;
|
|
/* do not inject data into pcb */
|
|
} else
|
|
#endif /* FAST_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 {
|
|
u_int8_t *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, u_int8_t *));
|
|
}
|
|
ip6stat.ip6s_delivered--;
|
|
}
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
void
|
|
rip6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
|
|
{
|
|
struct ip6_hdr *ip6;
|
|
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;
|
|
ip6 = ip6cp->ip6c_ip6;
|
|
cmdarg = ip6cp->ip6c_cmdarg;
|
|
sa6_src = ip6cp->ip6c_src;
|
|
nxt = ip6cp->ip6c_nxt;
|
|
} else {
|
|
ip6 = NULL;
|
|
cmdarg = NULL;
|
|
sa6_src = &sa6_any;
|
|
nxt = -1;
|
|
}
|
|
|
|
if (ip6 && cmd == PRC_MSGSIZE) {
|
|
const struct sockaddr_in6 *sa6 = (const 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(&raw6cbtable, &sa6->sin6_addr, 0,
|
|
(const 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(&raw6cbtable,
|
|
&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:
|
|
* - recalculate 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 (RFC3542), because some
|
|
* unconnected sockets may share the same destination
|
|
* and want to know the path MTU.
|
|
*/
|
|
}
|
|
|
|
(void) in6_pcbnotify(&raw6cbtable, sa, 0,
|
|
(const 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;
|
|
struct ifnet *oifp = NULL;
|
|
int type, code; /* for ICMPv6 output statistics only */
|
|
int priv = 0;
|
|
int scope_ambiguous = 0;
|
|
struct in6_addr *in6a;
|
|
va_list ap;
|
|
|
|
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;
|
|
if (curlwp && !kauth_authorize_generic(curlwp->l_cred,
|
|
KAUTH_GENERIC_ISSUSER, NULL))
|
|
priv = 1;
|
|
|
|
dst = &dstsock->sin6_addr;
|
|
if (control) {
|
|
if ((error = ip6_setpktopts(control, &opt,
|
|
in6p->in6p_outputopts,
|
|
priv, so->so_proto->pr_protocol)) != 0) {
|
|
goto bad;
|
|
}
|
|
optp = &opt;
|
|
} else
|
|
optp = in6p->in6p_outputopts;
|
|
|
|
/*
|
|
* Check and convert scope zone ID into internal form.
|
|
* XXX: we may still need to determine the zone later.
|
|
*/
|
|
if (!(so->so_state & SS_ISCONNECTED)) {
|
|
if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone)
|
|
scope_ambiguous = 1;
|
|
if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0)
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
} else {
|
|
type = 0;
|
|
code = 0;
|
|
}
|
|
|
|
M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
|
|
/*
|
|
* Next header might not be ICMP6 but use its pseudo header anyway.
|
|
*/
|
|
ip6->ip6_dst = *dst;
|
|
|
|
/*
|
|
* Source address selection.
|
|
*/
|
|
if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
|
|
(struct route *)&in6p->in6p_route, &in6p->in6p_laddr, &oifp,
|
|
&error)) == 0) {
|
|
if (error == 0)
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
ip6->ip6_src = *in6a;
|
|
|
|
if (oifp && scope_ambiguous) {
|
|
/*
|
|
* Application should provide a proper zone ID or the use of
|
|
* default zone IDs should be enabled. Unfortunately, some
|
|
* applications do not behave as it should, so we need a
|
|
* workaround. Even if an appropriate ID is not determined
|
|
* (when it's required), if we can determine the outgoing
|
|
* interface. determine the zone ID based on the interface.
|
|
*/
|
|
error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
ip6->ip6_dst = dstsock->sin6_addr;
|
|
|
|
/* fill in the rest of the IPv6 header fields */
|
|
ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
|
|
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
|
|
ip6->ip6_vfc |= IPV6_VERSION;
|
|
/* ip6_plen will be filled in ip6_output, so not fill it here. */
|
|
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;
|
|
|
|
/* 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 = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum,
|
|
M_DONTWAIT);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
|
|
m = m_copyback_cow(m, off, sizeof(sum), (caddr_t)&sum,
|
|
M_DONTWAIT);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
error = ip6_output(m, optp, &in6p->in6p_route, 0,
|
|
in6p->in6p_moptions, so, &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 (control) {
|
|
ip6_clearpktopts(&opt, -1);
|
|
m_freem(control);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Raw IPv6 socket option processing.
|
|
*/
|
|
int
|
|
rip6_ctloutput(int op, struct socket *so, int level, int optname,
|
|
struct mbuf **mp)
|
|
{
|
|
int error = 0;
|
|
|
|
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:
|
|
return ip6_raw_ctloutput(op, so, level, optname, mp);
|
|
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, l)
|
|
struct socket *so;
|
|
int req;
|
|
struct mbuf *m, *nam, *control;
|
|
struct lwp *l;
|
|
{
|
|
struct in6pcb *in6p = sotoin6pcb(so);
|
|
int s;
|
|
int error = 0;
|
|
int priv;
|
|
|
|
priv = 0;
|
|
if (l && !kauth_authorize_generic(l->l_cred,
|
|
KAUTH_GENERIC_ISSUSER, NULL))
|
|
priv++;
|
|
|
|
if (req == PRU_CONTROL)
|
|
return in6_control(so, (u_long)m, (caddr_t)nam,
|
|
(struct ifnet *)control, l);
|
|
|
|
if (req == PRU_PURGEIF) {
|
|
in6_pcbpurgeif0(&raw6cbtable, (struct ifnet *)control);
|
|
in6_purgeif((struct ifnet *)control);
|
|
in6_pcbpurgeif(&raw6cbtable, (struct ifnet *)control);
|
|
return 0;
|
|
}
|
|
|
|
switch (req) {
|
|
case PRU_ATTACH:
|
|
if (in6p != NULL)
|
|
panic("rip6_attach");
|
|
if (!priv) {
|
|
error = EACCES;
|
|
break;
|
|
}
|
|
s = splsoftnet();
|
|
error = soreserve(so, rip6_sendspace, rip6_recvspace);
|
|
if (error != 0) {
|
|
splx(s);
|
|
break;
|
|
}
|
|
if ((error = in6_pcballoc(so, &raw6cbtable)) != 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 == NULL)
|
|
panic("rip6_detach");
|
|
if (so == ip6_mrouter)
|
|
ip6_mrouter_done();
|
|
/* xxx: RSVP */
|
|
if (in6p->in6p_icmp6filt != NULL) {
|
|
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 (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
|
|
break;
|
|
|
|
/*
|
|
* 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;
|
|
struct ifnet *ifp = NULL;
|
|
int scope_ambiguous = 0;
|
|
|
|
if (nam->m_len != sizeof(*addr)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (TAILQ_EMPTY(&ifnet)) {
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
if (addr->sin6_family != AF_INET6) {
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Application should provide a proper zone ID or the use of
|
|
* default zone IDs should be enabled. Unfortunately, some
|
|
* applications do not behave as it should, so we need a
|
|
* workaround. Even if an appropriate ID is not determined,
|
|
* we'll see if we can determine the outgoing interface. If we
|
|
* can, determine the zone ID based on the interface below.
|
|
*/
|
|
if (addr->sin6_scope_id == 0 && !ip6_use_defzone)
|
|
scope_ambiguous = 1;
|
|
if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
|
|
return error;
|
|
|
|
/* Source address selection. XXX: need pcblookup? */
|
|
in6a = in6_selectsrc(addr, in6p->in6p_outputopts,
|
|
in6p->in6p_moptions, (struct route *)&in6p->in6p_route,
|
|
&in6p->in6p_laddr, &ifp, &error);
|
|
if (in6a == NULL) {
|
|
if (error == 0)
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
/* XXX: see above */
|
|
if (ifp && scope_ambiguous &&
|
|
(error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
|
|
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;
|
|
}
|
|
if (nam->m_len != sizeof(tmp)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
tmp = *mtod(nam, struct sockaddr_in6 *);
|
|
dst = &tmp;
|
|
|
|
if (dst->sin6_family != AF_INET6) {
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
}
|
|
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;
|
|
}
|
|
|
|
SYSCTL_SETUP(sysctl_net_inet6_raw6_setup, "sysctl net.inet6.raw6 subtree setup")
|
|
{
|
|
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "net", NULL,
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "inet6", NULL,
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, PF_INET6, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "raw6",
|
|
SYSCTL_DESCR("Raw IPv6 settings"),
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, PF_INET6, IPPROTO_RAW, CTL_EOL);
|
|
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_STRUCT, "pcblist",
|
|
SYSCTL_DESCR("Raw IPv6 control block list"),
|
|
sysctl_inpcblist, 0, &raw6cbtable, 0,
|
|
CTL_NET, PF_INET6, IPPROTO_RAW,
|
|
CTL_CREATE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_STRUCT, "stats",
|
|
SYSCTL_DESCR("Raw IPv6 statistics"),
|
|
NULL, 0, &rip6stat, sizeof(rip6stat),
|
|
CTL_NET, PF_INET6, IPPROTO_RAW, RAW6CTL_STATS,
|
|
CTL_EOL);
|
|
}
|