de0bd6f76b
if (jailed(cred)) left. If you are running with a vnet (virtual network stack) those will return true and defer you to classic IP-jails handling and thus things will be "denied" or returned with an error. Work around this problem by introducing another "jailed()" function, jailed_without_vnet(), that also takes vnets into account, and permits the calls, should the jail from the given cred have its own virtual network stack. We cannot change the classic jailed() call to do that, as it is used outside the network stack as well. Discussed with: julian, zec, jamie, rwatson (back in Sept) MFC after: 5 days
899 lines
23 KiB
C
899 lines
23 KiB
C
/*-
|
|
* 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.
|
|
* 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_ipsec.h"
|
|
#include "opt_inet6.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/jail.h>
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|
#include <sys/lock.h>
|
|
#include <sys/malloc.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/sx.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/route.h>
|
|
#include <net/vnet.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in_pcb.h>
|
|
|
|
#include <netinet/icmp6.h>
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6protosw.h>
|
|
#include <netinet6/ip6_mroute.h>
|
|
#include <netinet6/in6_pcb.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet6/nd6.h>
|
|
#include <netinet6/raw_ip6.h>
|
|
#include <netinet6/scope6_var.h>
|
|
|
|
#ifdef IPSEC
|
|
#include <netipsec/ipsec.h>
|
|
#include <netipsec/ipsec6.h>
|
|
#endif /* IPSEC */
|
|
|
|
#include <machine/stdarg.h>
|
|
|
|
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
|
|
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
|
|
|
|
/*
|
|
* Raw interface to IP6 protocol.
|
|
*/
|
|
|
|
VNET_DECLARE(struct inpcbhead, ripcb);
|
|
VNET_DECLARE(struct inpcbinfo, ripcbinfo);
|
|
#define V_ripcb VNET(ripcb)
|
|
#define V_ripcbinfo VNET(ripcbinfo)
|
|
|
|
VNET_DEFINE(struct rip6stat, rip6stat);
|
|
|
|
extern u_long rip_sendspace;
|
|
extern u_long rip_recvspace;
|
|
|
|
/*
|
|
* Hooks for multicast routing. They all default to NULL, so leave them not
|
|
* initialized and rely on BSS being set to 0.
|
|
*/
|
|
|
|
/*
|
|
* The socket used to communicate with the multicast routing daemon.
|
|
*/
|
|
VNET_DEFINE(struct socket *, ip6_mrouter);
|
|
|
|
/*
|
|
* The various mrouter functions.
|
|
*/
|
|
int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
|
|
int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
|
|
int (*ip6_mrouter_done)(void);
|
|
int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
|
|
int (*mrt6_ioctl)(u_long, caddr_t);
|
|
|
|
/*
|
|
* Setup generic address and protocol structures for raw_input routine, then
|
|
* pass them along with mbuf chain.
|
|
*/
|
|
int
|
|
rip6_input(struct mbuf **mp, int *offp, int proto)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct mbuf *m = *mp;
|
|
register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
|
|
register struct inpcb *in6p;
|
|
struct inpcb *last = 0;
|
|
struct mbuf *opts = NULL;
|
|
struct sockaddr_in6 fromsa;
|
|
|
|
V_rip6stat.rip6s_ipackets++;
|
|
|
|
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
|
|
/* XXX Send icmp6 host/port unreach? */
|
|
m_freem(m);
|
|
return (IPPROTO_DONE);
|
|
}
|
|
|
|
init_sin6(&fromsa, m); /* general init */
|
|
|
|
ifp = m->m_pkthdr.rcvif;
|
|
|
|
INP_INFO_RLOCK(&V_ripcbinfo);
|
|
LIST_FOREACH(in6p, &V_ripcb, inp_list) {
|
|
/* XXX inp locking */
|
|
if ((in6p->inp_vflag & INP_IPV6) == 0)
|
|
continue;
|
|
if (in6p->inp_ip_p &&
|
|
in6p->inp_ip_p != 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 (jailed_without_vnet(in6p->inp_cred)) {
|
|
/*
|
|
* Allow raw socket in jail to receive multicast;
|
|
* assume process had PRIV_NETINET_RAW at attach,
|
|
* and fall through into normal filter path if so.
|
|
*/
|
|
if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
|
|
prison_check_ip6(in6p->inp_cred,
|
|
&ip6->ip6_dst) != 0)
|
|
continue;
|
|
}
|
|
if (in6p->in6p_cksum != -1) {
|
|
V_rip6stat.rip6s_isum++;
|
|
if (in6_cksum(m, proto, *offp,
|
|
m->m_pkthdr.len - *offp)) {
|
|
INP_RUNLOCK(in6p);
|
|
V_rip6stat.rip6s_badsum++;
|
|
continue;
|
|
}
|
|
}
|
|
INP_RLOCK(in6p);
|
|
/*
|
|
* If this raw socket has multicast state, and we
|
|
* have received a multicast, check if this socket
|
|
* should receive it, as multicast filtering is now
|
|
* the responsibility of the transport layer.
|
|
*/
|
|
if (in6p->in6p_moptions &&
|
|
IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
|
/*
|
|
* If the incoming datagram is for MLD, allow it
|
|
* through unconditionally to the raw socket.
|
|
*
|
|
* Use the M_RTALERT_MLD flag to check for MLD
|
|
* traffic without having to inspect the mbuf chain
|
|
* more deeply, as all MLDv1/v2 host messages MUST
|
|
* contain the Router Alert option.
|
|
*
|
|
* In the case of MLDv1, we may not have explicitly
|
|
* joined the group, and may have set IFF_ALLMULTI
|
|
* on the interface. im6o_mc_filter() may discard
|
|
* control traffic we actually need to see.
|
|
*
|
|
* Userland multicast routing daemons should continue
|
|
* filter the control traffic appropriately.
|
|
*/
|
|
int blocked;
|
|
|
|
blocked = MCAST_PASS;
|
|
if ((m->m_flags & M_RTALERT_MLD) == 0) {
|
|
struct sockaddr_in6 mcaddr;
|
|
|
|
bzero(&mcaddr, sizeof(struct sockaddr_in6));
|
|
mcaddr.sin6_len = sizeof(struct sockaddr_in6);
|
|
mcaddr.sin6_family = AF_INET6;
|
|
mcaddr.sin6_addr = ip6->ip6_dst;
|
|
|
|
blocked = im6o_mc_filter(in6p->in6p_moptions,
|
|
ifp,
|
|
(struct sockaddr *)&mcaddr,
|
|
(struct sockaddr *)&fromsa);
|
|
}
|
|
if (blocked != MCAST_PASS) {
|
|
IP6STAT_INC(ip6s_notmember);
|
|
continue;
|
|
}
|
|
}
|
|
if (last != NULL) {
|
|
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
|
|
|
|
#ifdef IPSEC
|
|
/*
|
|
* Check AH/ESP integrity.
|
|
*/
|
|
if (n && ipsec6_in_reject(n, last)) {
|
|
m_freem(n);
|
|
V_ipsec6stat.in_polvio++;
|
|
/* Do not inject data into pcb. */
|
|
} else
|
|
#endif /* IPSEC */
|
|
if (n) {
|
|
if (last->inp_flags & INP_CONTROLOPTS ||
|
|
last->inp_socket->so_options & SO_TIMESTAMP)
|
|
ip6_savecontrol(last, n, &opts);
|
|
/* strip intermediate headers */
|
|
m_adj(n, *offp);
|
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
|
(struct sockaddr *)&fromsa,
|
|
n, opts) == 0) {
|
|
m_freem(n);
|
|
if (opts)
|
|
m_freem(opts);
|
|
V_rip6stat.rip6s_fullsock++;
|
|
} else
|
|
sorwakeup(last->inp_socket);
|
|
opts = NULL;
|
|
}
|
|
INP_RUNLOCK(last);
|
|
}
|
|
last = in6p;
|
|
}
|
|
INP_INFO_RUNLOCK(&V_ripcbinfo);
|
|
#ifdef IPSEC
|
|
/*
|
|
* Check AH/ESP integrity.
|
|
*/
|
|
if ((last != NULL) && ipsec6_in_reject(m, last)) {
|
|
m_freem(m);
|
|
V_ipsec6stat.in_polvio++;
|
|
V_ip6stat.ip6s_delivered--;
|
|
/* Do not inject data into pcb. */
|
|
INP_RUNLOCK(last);
|
|
} else
|
|
#endif /* IPSEC */
|
|
if (last != NULL) {
|
|
if (last->inp_flags & INP_CONTROLOPTS ||
|
|
last->inp_socket->so_options & SO_TIMESTAMP)
|
|
ip6_savecontrol(last, m, &opts);
|
|
/* Strip intermediate headers. */
|
|
m_adj(m, *offp);
|
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
|
(struct sockaddr *)&fromsa, m, opts) == 0) {
|
|
m_freem(m);
|
|
if (opts)
|
|
m_freem(opts);
|
|
V_rip6stat.rip6s_fullsock++;
|
|
} else
|
|
sorwakeup(last->inp_socket);
|
|
INP_RUNLOCK(last);
|
|
} else {
|
|
V_rip6stat.rip6s_nosock++;
|
|
if (m->m_flags & M_MCAST)
|
|
V_rip6stat.rip6s_nosockmcast++;
|
|
if (proto == IPPROTO_NONE)
|
|
m_freem(m);
|
|
else {
|
|
char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
|
|
icmp6_error(m, ICMP6_PARAM_PROB,
|
|
ICMP6_PARAMPROB_NEXTHEADER,
|
|
prvnxtp - mtod(m, char *));
|
|
}
|
|
V_ip6stat.ip6s_delivered--;
|
|
}
|
|
return (IPPROTO_DONE);
|
|
}
|
|
|
|
void
|
|
rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
|
|
{
|
|
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)(struct inpcb *, int) = in6_rtchange;
|
|
|
|
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;
|
|
}
|
|
|
|
(void) in6_pcbnotify(&V_ripcbinfo, 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 mbuf *control;
|
|
struct socket *so;
|
|
struct sockaddr_in6 *dstsock;
|
|
struct in6_addr *dst;
|
|
struct ip6_hdr *ip6;
|
|
struct inpcb *in6p;
|
|
u_int plen = m->m_pkthdr.len;
|
|
int error = 0;
|
|
struct ip6_pktopts opt, *optp;
|
|
struct ifnet *oifp = NULL;
|
|
int type = 0, code = 0; /* for ICMPv6 output statistics only */
|
|
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 = sotoinpcb(so);
|
|
INP_WLOCK(in6p);
|
|
|
|
dst = &dstsock->sin6_addr;
|
|
if (control != NULL) {
|
|
if ((error = ip6_setpktopts(control, &opt,
|
|
in6p->in6p_outputopts, so->so_cred,
|
|
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 && !V_ip6_use_defzone)
|
|
scope_ambiguous = 1;
|
|
if ((error = sa6_embedscope(dstsock, V_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;
|
|
}
|
|
|
|
M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
}
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
|
|
/*
|
|
* Source address selection.
|
|
*/
|
|
error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred,
|
|
&oifp, &in6a);
|
|
if (error)
|
|
goto bad;
|
|
error = prison_get_ip6(in6p->inp_cred, &in6a);
|
|
if (error != 0)
|
|
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 = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
|
|
(in6p->inp_flow & IPV6_FLOWINFO_MASK);
|
|
ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
|
|
(IPV6_VERSION & IPV6_VERSION_MASK);
|
|
|
|
/*
|
|
* ip6_plen will be filled in ip6_output, so not fill it here.
|
|
*/
|
|
ip6->ip6_nxt = in6p->inp_ip_p;
|
|
ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
|
|
|
|
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
|
|
in6p->in6p_cksum != -1) {
|
|
struct mbuf *n;
|
|
int off;
|
|
u_int16_t *p;
|
|
|
|
/* 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);
|
|
|
|
n = m;
|
|
while (n && n->m_len <= off) {
|
|
off -= n->m_len;
|
|
n = n->m_next;
|
|
}
|
|
if (!n)
|
|
goto bad;
|
|
p = (u_int16_t *)(mtod(n, caddr_t) + off);
|
|
*p = 0;
|
|
*p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
|
|
}
|
|
|
|
error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p);
|
|
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
|
|
if (oifp)
|
|
icmp6_ifoutstat_inc(oifp, type, code);
|
|
ICMP6STAT_INC(icp6s_outhist[type]);
|
|
} else
|
|
V_rip6stat.rip6s_opackets++;
|
|
|
|
goto freectl;
|
|
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
|
|
freectl:
|
|
if (control != NULL) {
|
|
ip6_clearpktopts(&opt, -1);
|
|
m_freem(control);
|
|
}
|
|
INP_WUNLOCK(in6p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Raw IPv6 socket option processing.
|
|
*/
|
|
int
|
|
rip6_ctloutput(struct socket *so, struct sockopt *sopt)
|
|
{
|
|
int error;
|
|
|
|
if (sopt->sopt_level == IPPROTO_ICMPV6)
|
|
/*
|
|
* XXX: is it better to call icmp6_ctloutput() directly
|
|
* from protosw?
|
|
*/
|
|
return (icmp6_ctloutput(so, sopt));
|
|
else if (sopt->sopt_level != IPPROTO_IPV6)
|
|
return (EINVAL);
|
|
|
|
error = 0;
|
|
|
|
switch (sopt->sopt_dir) {
|
|
case SOPT_GET:
|
|
switch (sopt->sopt_name) {
|
|
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:
|
|
error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) :
|
|
EOPNOTSUPP;
|
|
break;
|
|
case IPV6_CHECKSUM:
|
|
error = ip6_raw_ctloutput(so, sopt);
|
|
break;
|
|
default:
|
|
error = ip6_ctloutput(so, sopt);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SOPT_SET:
|
|
switch (sopt->sopt_name) {
|
|
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:
|
|
error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) :
|
|
EOPNOTSUPP;
|
|
break;
|
|
case IPV6_CHECKSUM:
|
|
error = ip6_raw_ctloutput(so, sopt);
|
|
break;
|
|
default:
|
|
error = ip6_ctloutput(so, sopt);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
rip6_attach(struct socket *so, int proto, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
struct icmp6_filter *filter;
|
|
int error;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp == NULL, ("rip6_attach: inp != NULL"));
|
|
|
|
error = priv_check(td, PRIV_NETINET_RAW);
|
|
if (error)
|
|
return (error);
|
|
error = soreserve(so, rip_sendspace, rip_recvspace);
|
|
if (error)
|
|
return (error);
|
|
filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
|
|
if (filter == NULL)
|
|
return (ENOMEM);
|
|
INP_INFO_WLOCK(&V_ripcbinfo);
|
|
error = in_pcballoc(so, &V_ripcbinfo);
|
|
if (error) {
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
free(filter, M_PCB);
|
|
return (error);
|
|
}
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
inp->inp_vflag |= INP_IPV6;
|
|
inp->inp_ip_p = (long)proto;
|
|
inp->in6p_hops = -1; /* use kernel default */
|
|
inp->in6p_cksum = -1;
|
|
inp->in6p_icmp6filt = filter;
|
|
ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
|
|
INP_WUNLOCK(inp);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
rip6_detach(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_detach: inp == NULL"));
|
|
|
|
if (so == V_ip6_mrouter && ip6_mrouter_done)
|
|
ip6_mrouter_done();
|
|
/* xxx: RSVP */
|
|
INP_INFO_WLOCK(&V_ripcbinfo);
|
|
INP_WLOCK(inp);
|
|
free(inp->in6p_icmp6filt, M_PCB);
|
|
in_pcbdetach(inp);
|
|
in_pcbfree(inp);
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
}
|
|
|
|
/* XXXRW: This can't ever be called. */
|
|
static void
|
|
rip6_abort(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_abort: inp == NULL"));
|
|
|
|
soisdisconnected(so);
|
|
}
|
|
|
|
static void
|
|
rip6_close(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_close: inp == NULL"));
|
|
|
|
soisdisconnected(so);
|
|
}
|
|
|
|
static int
|
|
rip6_disconnect(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL"));
|
|
|
|
if ((so->so_state & SS_ISCONNECTED) == 0)
|
|
return (ENOTCONN);
|
|
inp->in6p_faddr = in6addr_any;
|
|
rip6_abort(so);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
|
|
struct ifaddr *ifa = NULL;
|
|
int error = 0;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_bind: inp == NULL"));
|
|
|
|
if (nam->sa_len != sizeof(*addr))
|
|
return (EINVAL);
|
|
if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0)
|
|
return (error);
|
|
if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6)
|
|
return (EADDRNOTAVAIL);
|
|
if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
|
|
return (error);
|
|
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
|
|
(ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
|
|
return (EADDRNOTAVAIL);
|
|
if (ifa != NULL &&
|
|
((struct in6_ifaddr *)ifa)->ia6_flags &
|
|
(IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
|
|
IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
|
|
ifa_free(ifa);
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
if (ifa != NULL)
|
|
ifa_free(ifa);
|
|
INP_INFO_WLOCK(&V_ripcbinfo);
|
|
INP_WLOCK(inp);
|
|
inp->in6p_laddr = addr->sin6_addr;
|
|
INP_WUNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
|
|
struct in6_addr in6a;
|
|
struct ifnet *ifp = NULL;
|
|
int error = 0, scope_ambiguous = 0;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_connect: inp == NULL"));
|
|
|
|
if (nam->sa_len != sizeof(*addr))
|
|
return (EINVAL);
|
|
if (TAILQ_EMPTY(&V_ifnet))
|
|
return (EADDRNOTAVAIL);
|
|
if (addr->sin6_family != AF_INET6)
|
|
return (EAFNOSUPPORT);
|
|
|
|
/*
|
|
* 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 && !V_ip6_use_defzone)
|
|
scope_ambiguous = 1;
|
|
if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
|
|
return (error);
|
|
|
|
INP_INFO_WLOCK(&V_ripcbinfo);
|
|
INP_WLOCK(inp);
|
|
/* Source address selection. XXX: need pcblookup? */
|
|
error = in6_selectsrc(addr, inp->in6p_outputopts,
|
|
inp, NULL, so->so_cred, &ifp, &in6a);
|
|
if (error) {
|
|
INP_WUNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
return (error);
|
|
}
|
|
|
|
/* XXX: see above */
|
|
if (ifp && scope_ambiguous &&
|
|
(error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
|
|
INP_WUNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
return (error);
|
|
}
|
|
inp->in6p_faddr = addr->sin6_addr;
|
|
inp->in6p_laddr = in6a;
|
|
soisconnected(so);
|
|
INP_WUNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&V_ripcbinfo);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rip6_shutdown(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL"));
|
|
|
|
INP_WLOCK(inp);
|
|
socantsendmore(so);
|
|
INP_WUNLOCK(inp);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
|
|
struct mbuf *control, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
struct sockaddr_in6 tmp;
|
|
struct sockaddr_in6 *dst;
|
|
int ret;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("rip6_send: inp == NULL"));
|
|
|
|
/* Always copy sockaddr to avoid overwrites. */
|
|
/* Unlocked read. */
|
|
if (so->so_state & SS_ISCONNECTED) {
|
|
if (nam) {
|
|
m_freem(m);
|
|
return (EISCONN);
|
|
}
|
|
/* XXX */
|
|
bzero(&tmp, sizeof(tmp));
|
|
tmp.sin6_family = AF_INET6;
|
|
tmp.sin6_len = sizeof(struct sockaddr_in6);
|
|
INP_RLOCK(inp);
|
|
bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
INP_RUNLOCK(inp);
|
|
dst = &tmp;
|
|
} else {
|
|
if (nam == NULL) {
|
|
m_freem(m);
|
|
return (ENOTCONN);
|
|
}
|
|
if (nam->sa_len != sizeof(struct sockaddr_in6)) {
|
|
m_freem(m);
|
|
return (EINVAL);
|
|
}
|
|
tmp = *(struct sockaddr_in6 *)nam;
|
|
dst = &tmp;
|
|
|
|
if (dst->sin6_family == AF_UNSPEC) {
|
|
/*
|
|
* XXX: we allow this case for backward
|
|
* compatibility to buggy applications that
|
|
* rely on old (and wrong) kernel behavior.
|
|
*/
|
|
log(LOG_INFO, "rip6 SEND: address family is "
|
|
"unspec. Assume AF_INET6\n");
|
|
dst->sin6_family = AF_INET6;
|
|
} else if (dst->sin6_family != AF_INET6) {
|
|
m_freem(m);
|
|
return(EAFNOSUPPORT);
|
|
}
|
|
}
|
|
ret = rip6_output(m, so, dst, control);
|
|
return (ret);
|
|
}
|
|
|
|
struct pr_usrreqs rip6_usrreqs = {
|
|
.pru_abort = rip6_abort,
|
|
.pru_attach = rip6_attach,
|
|
.pru_bind = rip6_bind,
|
|
.pru_connect = rip6_connect,
|
|
.pru_control = in6_control,
|
|
.pru_detach = rip6_detach,
|
|
.pru_disconnect = rip6_disconnect,
|
|
.pru_peeraddr = in6_getpeeraddr,
|
|
.pru_send = rip6_send,
|
|
.pru_shutdown = rip6_shutdown,
|
|
.pru_sockaddr = in6_getsockaddr,
|
|
.pru_close = rip6_close,
|
|
};
|