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f-stack/freebsd/netinet6/raw_ip6.c

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/*-
* 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>
#include <sys/kernel.h>
#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_var.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 <netinet/ip_var.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>
#include <netinet6/send.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)
extern u_long rip_sendspace;
extern u_long rip_recvspace;
VNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat);
VNET_PCPUSTAT_SYSINIT(rip6stat);
#ifdef VIMAGE
VNET_PCPUSTAT_SYSUNINIT(rip6stat);
#endif /* VIMAGE */
/*
* 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 = NULL;
struct mbuf *opts = NULL;
struct sockaddr_in6 fromsa;
RIP6STAT_INC(rip6s_ipackets);
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;
}
INP_RLOCK(in6p);
if (in6p->in6p_cksum != -1) {
RIP6STAT_INC(rip6s_isum);
if (in6_cksum(m, proto, *offp,
m->m_pkthdr.len - *offp)) {
INP_RUNLOCK(in6p);
RIP6STAT_INC(rip6s_badsum);
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,
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);
/* 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);
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
rip6_output(struct mbuf *m, struct socket *so, ...)
{
struct mbuf *control;
struct m_tag *mtag;
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;
int hlim = 0;
struct in6_addr in6a;
va_list ap;
va_start(ap, so);
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_socket(dstsock, optp, in6p, so->so_cred,
scope_ambiguous, &in6a, &hlim);
if (error)
goto bad;
error = prison_check_ip6(in6p->inp_cred, &in6a);
if (error != 0)
goto bad;
ip6->ip6_src = in6a;
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 = hlim;
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;
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_socket(addr, inp->in6p_outputopts,
inp, so->so_cred, scope_ambiguous, &in6a, NULL);
if (error) {
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,
};
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