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freebsd-skq/sys/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.
*
* $FreeBSD$
*/
/*-
* 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 "opt_ipsec.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.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/systm.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/icmp6.h>
#include <netinet/in_pcb.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 <netinet6/ipsec.h>
#include <netinet6/ipsec6.h>
#endif /*IPSEC*/
#ifdef FAST_IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/ipsec6.h>
#endif /* FAST_IPSEC */
#include <machine/stdarg.h>
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
/*
* Raw interface to IP6 protocol.
*/
extern struct inpcbhead ripcb;
extern struct inpcbinfo ripcbinfo;
extern u_long rip_sendspace;
extern u_long rip_recvspace;
struct rip6stat rip6stat;
/*
* 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;
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;
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 */
INP_INFO_RLOCK(&ripcbinfo);
LIST_FOREACH(in6p, &ripcb, inp_list) {
INP_LOCK(in6p);
if ((in6p->in6p_vflag & INP_IPV6) == 0) {
docontinue:
INP_UNLOCK(in6p);
continue;
}
if (in6p->in6p_ip6_nxt &&
in6p->in6p_ip6_nxt != proto)
goto docontinue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
goto docontinue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
goto docontinue;
if (in6p->in6p_cksum != -1) {
rip6stat.rip6s_isum++;
if (in6_cksum(m, proto, *offp,
m->m_pkthdr.len - *offp)) {
rip6stat.rip6s_badsum++;
goto docontinue;
}
}
if (last) {
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
#if defined(IPSEC) || defined(FAST_IPSEC)
/*
* Check AH/ESP integrity.
*/
if (n && ipsec6_in_reject(n, last)) {
m_freem(n);
#ifdef IPSEC
ipsec6stat.in_polvio++;
#endif /*IPSEC*/
/* do not inject data into pcb */
} else
#endif /*IPSEC || FAST_IPSEC*/
if (n) {
if (last->in6p_flags & IN6P_CONTROLOPTS ||
last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, n, &opts);
/* strip intermediate headers */
m_adj(n, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&fromsa,
n, opts) == 0) {
m_freem(n);
if (opts)
m_freem(opts);
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
opts = NULL;
}
INP_UNLOCK(last);
}
last = in6p;
}
#if defined(IPSEC) || defined(FAST_IPSEC)
/*
* Check AH/ESP integrity.
*/
if (last && ipsec6_in_reject(m, last)) {
m_freem(m);
#ifdef IPSEC
ipsec6stat.in_polvio++;
#endif /*IPSEC*/
ip6stat.ip6s_delivered--;
/* do not inject data into pcb */
INP_UNLOCK(last);
} else
#endif /*IPSEC || FAST_IPSEC*/
if (last) {
if (last->in6p_flags & IN6P_CONTROLOPTS ||
last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, m, &opts);
/* strip intermediate headers */
m_adj(m, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&fromsa, m, opts) == 0) {
m_freem(m);
if (opts)
m_freem(opts);
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
INP_UNLOCK(last);
} else {
rip6stat.rip6s_nosock++;
if (m->m_flags & M_MCAST)
rip6stat.rip6s_nosockmcast++;
if (proto == IPPROTO_NONE)
m_freem(m);
else {
char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_NEXTHEADER,
prvnxtp - mtod(m, char *));
}
ip6stat.ip6s_delivered--;
}
INP_INFO_RUNLOCK(&ripcbinfo);
return IPPROTO_DONE;
}
void
rip6_ctlinput(cmd, sa, d)
int cmd;
struct sockaddr *sa;
void *d;
{
struct ip6_hdr *ip6;
struct mbuf *m;
int off = 0;
struct ip6ctlparam *ip6cp = NULL;
const struct sockaddr_in6 *sa6_src = NULL;
void *cmdarg;
struct inpcb *(*notify) __P((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(&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 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);
INP_LOCK(in6p);
priv = 0;
if (so->so_cred->cr_uid == 0)
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;
}
M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
if (m == NULL) {
error = ENOBUFS;
goto bad;
}
ip6 = mtod(m, struct ip6_hdr *);
/*
* Source address selection.
*/
if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL,
&in6p->in6p_laddr, &oifp, &error)) == NULL) {
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 = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
(in6p->in6p_flowinfo & 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->in6p_ip6_nxt;
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.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);
}
INP_UNLOCK(in6p);
return (error);
}
/*
* Raw IPv6 socket option processing.
*/
int
rip6_ctloutput(so, sopt)
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(so, sopt);
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(so, sopt);
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, s;
INP_INFO_WLOCK(&ripcbinfo);
inp = sotoinpcb(so);
if (inp) {
INP_INFO_WUNLOCK(&ripcbinfo);
panic("rip6_attach");
}
if (td && (error = suser(td)) != 0) {
INP_INFO_WUNLOCK(&ripcbinfo);
return error;
}
error = soreserve(so, rip_sendspace, rip_recvspace);
if (error) {
INP_INFO_WUNLOCK(&ripcbinfo);
return error;
}
MALLOC(filter, struct icmp6_filter *,
sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
if (filter == NULL) {
INP_INFO_WUNLOCK(&ripcbinfo);
return ENOMEM;
}
s = splnet();
error = in_pcballoc(so, &ripcbinfo, "raw6inp");
splx(s);
if (error) {
INP_INFO_WUNLOCK(&ripcbinfo);
FREE(filter, M_PCB);
return error;
}
inp = (struct inpcb *)so->so_pcb;
INP_LOCK(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
inp->inp_vflag |= INP_IPV6;
inp->in6p_ip6_nxt = (long)proto;
inp->in6p_hops = -1; /* use kernel default */
inp->in6p_cksum = -1;
inp->in6p_icmp6filt = filter;
ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
INP_UNLOCK(inp);
return 0;
}
static int
rip6_detach(struct socket *so)
{
struct inpcb *inp;
INP_INFO_WLOCK(&ripcbinfo);
inp = sotoinpcb(so);
if (inp == 0) {
INP_INFO_WUNLOCK(&ripcbinfo);
panic("rip6_detach");
}
/* xxx: RSVP */
if (so == ip6_mrouter)
ip6_mrouter_done();
if (inp->in6p_icmp6filt) {
FREE(inp->in6p_icmp6filt, M_PCB);
inp->in6p_icmp6filt = NULL;
}
INP_LOCK(inp);
in6_pcbdetach(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
return 0;
}
static int
rip6_abort(struct socket *so)
{
soisdisconnected(so);
return rip6_detach(so);
}
static int
rip6_disconnect(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
if ((so->so_state & SS_ISCONNECTED) == 0)
return ENOTCONN;
inp->in6p_faddr = in6addr_any;
return rip6_abort(so);
}
static int
rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
{
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct ifaddr *ia = NULL;
int error = 0;
if (nam->sa_len != sizeof(*addr))
return EINVAL;
if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
return EADDRNOTAVAIL;
if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
return(error);
if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
(ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
return EADDRNOTAVAIL;
if (ia &&
((struct in6_ifaddr *)ia)->ia6_flags &
(IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
return (EADDRNOTAVAIL);
}
INP_INFO_WLOCK(&ripcbinfo);
INP_LOCK(inp);
inp->in6p_laddr = addr->sin6_addr;
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
return 0;
}
static int
rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
{
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct in6_addr *in6a = NULL;
struct ifnet *ifp = NULL;
int error = 0, scope_ambiguous = 0;
if (nam->sa_len != sizeof(*addr))
return EINVAL;
if (TAILQ_EMPTY(&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 && !ip6_use_defzone)
scope_ambiguous = 1;
if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0)
return(error);
INP_INFO_WLOCK(&ripcbinfo);
INP_LOCK(inp);
/* Source address selection. XXX: need pcblookup? */
in6a = in6_selectsrc(addr, inp->in6p_outputopts,
inp->in6p_moptions, NULL,
&inp->in6p_laddr, &ifp, &error);
if (in6a == NULL) {
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
return (error ? error : EADDRNOTAVAIL);
}
/* XXX: see above */
if (ifp && scope_ambiguous &&
(error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
return(error);
}
inp->in6p_faddr = addr->sin6_addr;
inp->in6p_laddr = *in6a;
soisconnected(so);
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&ripcbinfo);
return 0;
}
static int
rip6_shutdown(struct socket *so)
{
struct inpcb *inp;
INP_INFO_RLOCK(&ripcbinfo);
inp = sotoinpcb(so);
INP_LOCK(inp);
INP_INFO_RUNLOCK(&ripcbinfo);
socantsendmore(so);
INP_UNLOCK(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 = sotoinpcb(so);
struct sockaddr_in6 tmp;
struct sockaddr_in6 *dst;
int ret;
INP_INFO_WLOCK(&ripcbinfo);
/* always copy sockaddr to avoid overwrites */
/* Unlocked read. */
if (so->so_state & SS_ISCONNECTED) {
if (nam) {
INP_INFO_WUNLOCK(&ripcbinfo);
m_freem(m);
return EISCONN;
}
/* XXX */
bzero(&tmp, sizeof(tmp));
tmp.sin6_family = AF_INET6;
tmp.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
sizeof(struct in6_addr));
dst = &tmp;
} else {
if (nam == NULL) {
INP_INFO_WUNLOCK(&ripcbinfo);
m_freem(m);
return ENOTCONN;
}
if (nam->sa_len != sizeof(struct sockaddr_in6)) {
INP_INFO_WUNLOCK(&ripcbinfo);
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) {
INP_INFO_WUNLOCK(&ripcbinfo);
m_freem(m);
return(EAFNOSUPPORT);
}
}
ret = rip6_output(m, so, dst, control);
INP_INFO_WUNLOCK(&ripcbinfo);
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_setpeeraddr,
.pru_send = rip6_send,
.pru_shutdown = rip6_shutdown,
.pru_sockaddr = in6_setsockaddr,
};
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