76039bc84f
to this event, adding if_var.h to files that do need it. Also, include all includes that now are included due to implicit pollution via if_var.h Sponsored by: Netflix Sponsored by: Nginx, Inc.
941 lines
24 KiB
C
941 lines
24 KiB
C
/*-
|
|
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
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* All rights reserved.
|
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*
|
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* 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.
|
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* 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.
|
|
*
|
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
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* 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)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*/
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|
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/*-
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* Copyright (c) 1982, 1986, 1988, 1993
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* The Regents of the University of California.
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* All rights reserved.
|
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*
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* 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
|
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* 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)
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|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*
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* @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ipsec.h"
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#include "opt_inet6.h"
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|
|
#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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|
#include <sys/priv.h>
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|
#include <sys/proc.h>
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#include <sys/protosw.h>
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|
#include <sys/signalvar.h>
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|
#include <sys/socket.h>
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#include <sys/socketvar.h>
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|
#include <sys/sx.h>
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#include <sys/syslog.h>
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|
|
|
#include <net/if.h>
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#include <net/if_var.h>
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|
#include <net/if_types.h>
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#include <net/route.h>
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#include <net/vnet.h>
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|
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|
#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/in_systm.h>
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|
#include <netinet/in_pcb.h>
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|
|
|
#include <netinet/icmp6.h>
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#include <netinet/ip6.h>
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#include <netinet/ip_var.h>
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#include <netinet6/ip6protosw.h>
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#include <netinet6/ip6_mroute.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet6/raw_ip6.h>
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#include <netinet6/scope6_var.h>
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#include <netinet6/send.h>
|
|
|
|
#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec6.h>
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#endif /* IPSEC */
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|
|
|
#include <machine/stdarg.h>
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|
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|
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
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#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
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|
|
/*
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* Raw interface to IP6 protocol.
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*/
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|
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VNET_DECLARE(struct inpcbhead, ripcb);
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VNET_DECLARE(struct inpcbinfo, ripcbinfo);
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#define V_ripcb VNET(ripcb)
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|
#define V_ripcbinfo VNET(ripcbinfo)
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|
|
|
extern u_long rip_sendspace;
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extern u_long rip_recvspace;
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|
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|
VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat);
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VNET_PCPUSTAT_SYSINIT(rip6stat);
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|
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|
#ifdef VIMAGE
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VNET_PCPUSTAT_SYSUNINIT(rip6stat);
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#endif /* VIMAGE */
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|
|
|
/*
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|
* Hooks for multicast routing. They all default to NULL, so leave them not
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* initialized and rely on BSS being set to 0.
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*/
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|
|
|
/*
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|
* The socket used to communicate with the multicast routing daemon.
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*/
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VNET_DEFINE(struct socket *, ip6_mrouter);
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|
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|
/*
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|
* The various mrouter functions.
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|
*/
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int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
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int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
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int (*ip6_mrouter_done)(void);
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int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
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int (*mrt6_ioctl)(u_long, caddr_t);
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|
|
|
/*
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* Setup generic address and protocol structures for raw_input routine, then
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* pass them along with mbuf chain.
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*/
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|
int
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|
rip6_input(struct mbuf **mp, int *offp, int proto)
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|
{
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struct ifnet *ifp;
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struct mbuf *m = *mp;
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register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
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register struct inpcb *in6p;
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struct inpcb *last = 0;
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struct mbuf *opts = NULL;
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struct sockaddr_in6 fromsa;
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|
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|
RIP6STAT_INC(rip6s_ipackets);
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|
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|
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
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|
/* XXX Send icmp6 host/port unreach? */
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m_freem(m);
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return (IPPROTO_DONE);
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|
}
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|
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|
init_sin6(&fromsa, m); /* general init */
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|
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|
ifp = m->m_pkthdr.rcvif;
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|
INP_INFO_RLOCK(&V_ripcbinfo);
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LIST_FOREACH(in6p, &V_ripcb, inp_list) {
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/* XXX inp locking */
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|
if ((in6p->inp_vflag & INP_IPV6) == 0)
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continue;
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|
if (in6p->inp_ip_p &&
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|
in6p->inp_ip_p != proto)
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|
continue;
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
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|
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
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|
continue;
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
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!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
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|
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;
|
|
}
|
|
INP_RLOCK(in6p);
|
|
if (in6p->in6p_cksum != -1) {
|
|
RIP6STAT_INC(rip6s_isum);
|
|
if (in6_cksum(m, proto, *offp,
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m->m_pkthdr.len - *offp)) {
|
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INP_RUNLOCK(in6p);
|
|
RIP6STAT_INC(rip6s_badsum);
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|
continue;
|
|
}
|
|
}
|
|
/*
|
|
* 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,
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|
ifp,
|
|
(struct sockaddr *)&mcaddr,
|
|
(struct sockaddr *)&fromsa);
|
|
}
|
|
if (blocked != MCAST_PASS) {
|
|
IP6STAT_INC(ip6s_notmember);
|
|
INP_RUNLOCK(in6p);
|
|
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);
|
|
IPSEC6STAT_INC(ips_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);
|
|
RIP6STAT_INC(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);
|
|
IPSEC6STAT_INC(ips_in_polvio);
|
|
IP6STAT_DEC(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);
|
|
RIP6STAT_INC(rip6s_fullsock);
|
|
} else
|
|
sorwakeup(last->inp_socket);
|
|
INP_RUNLOCK(last);
|
|
} else {
|
|
RIP6STAT_INC(rip6s_nosock);
|
|
if (m->m_flags & M_MCAST)
|
|
RIP6STAT_INC(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 *));
|
|
}
|
|
IP6STAT_DEC(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 m_tag *mtag;
|
|
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;
|
|
int use_defzone = 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 (!optp || !optp->ip6po_pktinfo ||
|
|
!optp->ip6po_pktinfo->ipi6_ifindex)
|
|
use_defzone = V_ip6_use_defzone;
|
|
if (dstsock->sin6_scope_id == 0 && !use_defzone)
|
|
scope_ambiguous = 1;
|
|
if ((error = sa6_embedscope(dstsock, 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_NOWAIT);
|
|
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_check_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);
|
|
}
|
|
|
|
/*
|
|
* Send RA/RS messages to user land for protection, before sending
|
|
* them to rtadvd/rtsol.
|
|
*/
|
|
if ((send_sendso_input_hook != NULL) &&
|
|
so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
|
|
switch (type) {
|
|
case ND_ROUTER_ADVERT:
|
|
case ND_ROUTER_SOLICIT:
|
|
mtag = m_tag_get(PACKET_TAG_ND_OUTGOING,
|
|
sizeof(unsigned short), M_NOWAIT);
|
|
if (mtag == NULL)
|
|
goto bad;
|
|
m_tag_prepend(m, mtag);
|
|
}
|
|
}
|
|
|
|
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
|
|
RIP6STAT_INC(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)
|
|
{
|
|
struct inpcb *inp;
|
|
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) {
|
|
if (sopt->sopt_level == SOL_SOCKET &&
|
|
sopt->sopt_name == SO_SETFIB) {
|
|
inp = sotoinpcb(so);
|
|
INP_WLOCK(inp);
|
|
inp->inp_inc.inc_fibnum = so->so_fibnum;
|
|
INP_WUNLOCK(inp);
|
|
return (0);
|
|
}
|
|
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,
|
|
};
|