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freebsd-nq/sys/netinet6/raw_ip6.c
Marko Zec f6dfe47a14 Permit buiding kernels with options VIMAGE, restricted to only a single 
active network stack instance.  Turning on options VIMAGE at compile
time yields the following changes relative to default kernel build:

1) V_ accessor macros for virtualized variables resolve to structure
fields via base pointers, instead of being resolved as fields in global
structs or plain global variables.  As an example, V_ifnet becomes:

    options VIMAGE:          ((struct vnet_net *) vnet_net)->_ifnet
    default build:           vnet_net_0._ifnet
    options VIMAGE_GLOBALS:  ifnet

2) INIT_VNET_* macros will declare and set up base pointers to be used
by V_ accessor macros, instead of resolving to whitespace:

    INIT_VNET_NET(ifp->if_vnet); becomes

    struct vnet_net *vnet_net = (ifp->if_vnet)->mod_data[VNET_MOD_NET];

3) Memory for vnet modules registered via vnet_mod_register() is now
allocated at run time in sys/kern/kern_vimage.c, instead of per vnet
module structs being declared as globals.  If required, vnet modules
can now request the framework to provide them with allocated bzeroed
memory by filling in the vmi_size field in their vmi_modinfo structures.

4) structs socket, ifnet, inpcbinfo, tcpcb and syncache_head are
extended to hold a pointer to the parent vnet.  options VIMAGE builds
will fill in those fields as required.

5) curvnet is introduced as a new global variable in options VIMAGE
builds, always pointing to the default and only struct vnet.

6) struct sysctl_oid has been extended with additional two fields to
store major and minor virtualization module identifiers, oid_v_subs and
oid_v_mod.  SYSCTL_V_* family of macros will fill in those fields
accordingly, and store the offset in the appropriate vnet container
struct in oid_arg1.
In sysctl handlers dealing with virtualized sysctls, the
SYSCTL_RESOLVE_V_ARG1() macro will compute the address of the target
variable and make it available in arg1 variable for further processing.

Unused fields in structs vnet_inet, vnet_inet6 and vnet_ipfw have
been deleted.

Reviewed by:	bz, rwatson
Approved by:	julian (mentor)
2009-04-30 13:36:26 +00:00

898 lines
23 KiB
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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 "opt_route.h"
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/jail.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 <sys/vimage.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/vinet.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>
#include <netinet6/vinet6.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.
*/
#ifdef VIMAGE_GLOBALS
extern struct inpcbhead ripcb;
extern struct inpcbinfo ripcbinfo;
struct rip6stat rip6stat;
#endif
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.
*/
#ifdef VIMAGE_GLOBALS
struct socket *ip6_mrouter;
#endif
/*
* 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)(int, 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)
{
INIT_VNET_INET(curvnet);
INIT_VNET_INET6(curvnet);
#ifdef IPSEC
INIT_VNET_IPSEC(curvnet);
#endif
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(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)) {
struct sockaddr_in6 mcaddr;
int blocked;
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)
{
INIT_VNET_INET(curvnet);
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
{
INIT_VNET_INET6(curvnet);
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.
*/
if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred,
&oifp, &error)) == NULL) {
if (error == 0)
error = EADDRNOTAVAIL;
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)
{
INIT_VNET_INET(so->so_vnet);
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)
{
INIT_VNET_INET(so->so_vnet);
INIT_VNET_INET6(so->so_vnet);
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)
{
INIT_VNET_NET(so->so_vnet);
INIT_VNET_INET(so->so_vnet);
INIT_VNET_INET6(so->so_vnet);
struct inpcb *inp;
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct ifaddr *ia = 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) &&
(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(&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)
{
INIT_VNET_NET(so->so_vnet);
INIT_VNET_INET(so->so_vnet);
INIT_VNET_INET6(so->so_vnet);
struct inpcb *inp;
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct in6_addr *in6a = NULL;
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? */
in6a = in6_selectsrc(addr, inp->in6p_outputopts,
inp, NULL, so->so_cred,
&ifp, &error);
if (in6a == NULL) {
INP_WUNLOCK(inp);
INP_INFO_WUNLOCK(&V_ripcbinfo);
return (error ? error : EADDRNOTAVAIL);
}
/* 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,
};
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