2005-01-07 01:45:51 +00:00
|
|
|
/*-
|
1994-05-24 10:09:53 +00:00
|
|
|
* Copyright (c) 1982, 1986, 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.
|
|
|
|
*
|
2001-10-17 10:44:39 +00:00
|
|
|
* @(#)if_loop.c 8.2 (Berkeley) 1/9/95
|
1999-08-28 01:08:13 +00:00
|
|
|
* $FreeBSD$
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Loopback interface driver for protocol testing and timing.
|
|
|
|
*/
|
|
|
|
|
1998-01-09 00:51:57 +00:00
|
|
|
#include "opt_atalk.h"
|
1998-01-08 23:42:31 +00:00
|
|
|
#include "opt_inet.h"
|
1999-12-07 17:39:16 +00:00
|
|
|
#include "opt_inet6.h"
|
1997-12-15 20:31:25 +00:00
|
|
|
#include "opt_ipx.h"
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/mbuf.h>
|
2001-01-31 07:58:58 +00:00
|
|
|
#include <sys/module.h>
|
2002-03-04 21:46:00 +00:00
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <sys/rman.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/socket.h>
|
1997-03-24 11:33:46 +00:00
|
|
|
#include <sys/sockio.h>
|
2001-01-29 11:06:26 +00:00
|
|
|
#include <sys/sysctl.h>
|
Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).
This is the first in a series of commits over the course
of the next few weeks.
Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.
We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.
Obtained from: //depot/projects/vimage-commit2/...
Reviewed by: brooks, des, ed, mav, julian,
jamie, kris, rwatson, zec, ...
(various people I forgot, different versions)
md5 (with a bit of help)
Sponsored by: NLnet Foundation, The FreeBSD Foundation
X-MFC after: never
V_Commit_Message_Reviewed_By: more people than the patch
2008-08-17 23:27:27 +00:00
|
|
|
#include <sys/vimage.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
#include <net/if.h>
|
Major overhaul of pseudo-interface cloning. Highlights include:
- Split the code out into if_clone.[ch].
- Locked struct if_clone. [1]
- Add a per-cloner match function rather then simply matching names of
the form <name><unit> and <name>.
- Use the match function to allow creation of <interface>.<tag>
vlan interfaces. The old way is preserved unchanged!
- Also the match function to allow creation of stf(4) interfaces named
stf0, stf, or 6to4. This is the only major user visible change in
that "ifconfig stf" creates the interface stf rather then stf0 and
does not print "stf0" to stdout.
- Allow destroy functions to fail so they can refuse to delete
interfaces. Currently, we forbid the deletion of interfaces which
were created in the init function, particularly lo0, pflog0, and
pfsync0. In the case of lo0 this was a panic implementation so it
does not count as a user visiable change. :-)
- Since most interfaces do not need the new functionality, an family of
wrapper functions, ifc_simple_*(), were created to wrap old style
cloner functions.
- The IF_CLONE_INITIALIZER macro is replaced with a new incompatible
IFC_CLONE_INITIALIZER and ifc_simple consumers use IFC_SIMPLE_DECLARE
instead.
Submitted by: Maurycy Pawlowski-Wieronski <maurycy at fouk.org> [1]
Reviewed by: andre, mlaier
Discussed on: net
2004-06-22 20:13:25 +00:00
|
|
|
#include <net/if_clone.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <net/if_types.h>
|
|
|
|
#include <net/netisr.h>
|
|
|
|
#include <net/route.h>
|
|
|
|
#include <net/bpf.h>
|
2008-12-02 21:37:28 +00:00
|
|
|
#include <net/vnet.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
#ifdef INET
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <netinet/in_var.h>
|
|
|
|
#endif
|
|
|
|
|
1995-10-26 20:31:59 +00:00
|
|
|
#ifdef IPX
|
|
|
|
#include <netipx/ipx.h>
|
|
|
|
#include <netipx/ipx_if.h>
|
|
|
|
#endif
|
|
|
|
|
1999-11-22 02:45:11 +00:00
|
|
|
#ifdef INET6
|
|
|
|
#ifndef INET
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#endif
|
|
|
|
#include <netinet6/in6_var.h>
|
2000-07-04 16:35:15 +00:00
|
|
|
#include <netinet/ip6.h>
|
1999-11-22 02:45:11 +00:00
|
|
|
#endif
|
|
|
|
|
1996-05-24 01:35:45 +00:00
|
|
|
#ifdef NETATALK
|
|
|
|
#include <netatalk/at.h>
|
|
|
|
#include <netatalk/at_var.h>
|
2001-09-10 01:33:03 +00:00
|
|
|
#endif
|
1996-05-24 01:35:45 +00:00
|
|
|
|
1994-05-29 07:43:54 +00:00
|
|
|
#ifdef TINY_LOMTU
|
1994-05-24 10:09:53 +00:00
|
|
|
#define LOMTU (1024+512)
|
1999-11-22 02:45:11 +00:00
|
|
|
#elif defined(LARGE_LOMTU)
|
|
|
|
#define LOMTU 131072
|
1994-05-29 07:43:54 +00:00
|
|
|
#else
|
1995-03-04 04:28:50 +00:00
|
|
|
#define LOMTU 16384
|
1994-05-29 07:43:54 +00:00
|
|
|
#endif
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2002-03-04 21:46:00 +00:00
|
|
|
int loioctl(struct ifnet *, u_long, caddr_t);
|
|
|
|
static void lortrequest(int, struct rtentry *, struct rt_addrinfo *);
|
|
|
|
int looutput(struct ifnet *ifp, struct mbuf *m,
|
|
|
|
struct sockaddr *dst, struct rtentry *rt);
|
2006-07-09 06:04:01 +00:00
|
|
|
static int lo_clone_create(struct if_clone *, int, caddr_t);
|
2004-04-14 00:57:49 +00:00
|
|
|
static void lo_clone_destroy(struct ifnet *);
|
2002-03-04 21:46:00 +00:00
|
|
|
|
2008-11-19 09:39:34 +00:00
|
|
|
#ifdef VIMAGE_GLOBALS
|
|
|
|
struct ifnet *loif; /* Used externally */
|
|
|
|
#endif
|
2002-03-04 21:46:00 +00:00
|
|
|
|
Major overhaul of pseudo-interface cloning. Highlights include:
- Split the code out into if_clone.[ch].
- Locked struct if_clone. [1]
- Add a per-cloner match function rather then simply matching names of
the form <name><unit> and <name>.
- Use the match function to allow creation of <interface>.<tag>
vlan interfaces. The old way is preserved unchanged!
- Also the match function to allow creation of stf(4) interfaces named
stf0, stf, or 6to4. This is the only major user visible change in
that "ifconfig stf" creates the interface stf rather then stf0 and
does not print "stf0" to stdout.
- Allow destroy functions to fail so they can refuse to delete
interfaces. Currently, we forbid the deletion of interfaces which
were created in the init function, particularly lo0, pflog0, and
pfsync0. In the case of lo0 this was a panic implementation so it
does not count as a user visiable change. :-)
- Since most interfaces do not need the new functionality, an family of
wrapper functions, ifc_simple_*(), were created to wrap old style
cloner functions.
- The IF_CLONE_INITIALIZER macro is replaced with a new incompatible
IFC_CLONE_INITIALIZER and ifc_simple consumers use IFC_SIMPLE_DECLARE
instead.
Submitted by: Maurycy Pawlowski-Wieronski <maurycy at fouk.org> [1]
Reviewed by: andre, mlaier
Discussed on: net
2004-06-22 20:13:25 +00:00
|
|
|
IFC_SIMPLE_DECLARE(lo, 1);
|
2002-03-04 21:46:00 +00:00
|
|
|
|
2004-04-14 00:57:49 +00:00
|
|
|
static void
|
2008-04-07 01:43:30 +00:00
|
|
|
lo_clone_destroy(struct ifnet *ifp)
|
2002-03-04 21:46:00 +00:00
|
|
|
{
|
2008-11-26 22:32:07 +00:00
|
|
|
#ifdef INVARIANTS
|
|
|
|
INIT_VNET_NET(ifp->if_vnet);
|
|
|
|
#endif
|
2002-03-04 21:46:00 +00:00
|
|
|
|
2002-05-25 20:17:04 +00:00
|
|
|
/* XXX: destroying lo0 will lead to panics. */
|
Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).
This is the first in a series of commits over the course
of the next few weeks.
Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.
We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.
Obtained from: //depot/projects/vimage-commit2/...
Reviewed by: brooks, des, ed, mav, julian,
jamie, kris, rwatson, zec, ...
(various people I forgot, different versions)
md5 (with a bit of help)
Sponsored by: NLnet Foundation, The FreeBSD Foundation
X-MFC after: never
V_Commit_Message_Reviewed_By: more people than the patch
2008-08-17 23:27:27 +00:00
|
|
|
KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__));
|
2002-03-04 21:46:00 +00:00
|
|
|
|
|
|
|
bpfdetach(ifp);
|
|
|
|
if_detach(ifp);
|
2005-06-10 16:49:24 +00:00
|
|
|
if_free(ifp);
|
2002-03-04 21:46:00 +00:00
|
|
|
}
|
|
|
|
|
2004-04-14 00:57:49 +00:00
|
|
|
static int
|
2008-04-07 01:43:30 +00:00
|
|
|
lo_clone_create(struct if_clone *ifc, int unit, caddr_t params)
|
2001-01-29 11:06:26 +00:00
|
|
|
{
|
Step 1.5 of importing the network stack virtualization infrastructure
from the vimage project, as per plan established at devsummit 08/08:
http://wiki.freebsd.org/Image/Notes200808DevSummit
Introduce INIT_VNET_*() initializer macros, VNET_FOREACH() iterator
macros, and CURVNET_SET() context setting macros, all currently
resolving to NOPs.
Prepare for virtualization of selected SYSCTL objects by introducing a
family of SYSCTL_V_*() macros, currently resolving to their global
counterparts, i.e. SYSCTL_V_INT() == SYSCTL_INT().
Move selected #defines from sys/sys/vimage.h to newly introduced header
files specific to virtualized subsystems (sys/net/vnet.h,
sys/netinet/vinet.h etc.).
All the changes are verified to have zero functional impact at this
point in time by doing MD5 comparision between pre- and post-change
object files(*).
(*) netipsec/keysock.c did not validate depending on compile time options.
Implemented by: julian, bz, brooks, zec
Reviewed by: julian, bz, brooks, kris, rwatson, ...
Approved by: julian (mentor)
Obtained from: //depot/projects/vimage-commit2/...
X-MFC after: never
Sponsored by: NLnet Foundation, The FreeBSD Foundation
2008-10-02 15:37:58 +00:00
|
|
|
INIT_VNET_NET(curvnet);
|
2005-06-10 16:49:24 +00:00
|
|
|
struct ifnet *ifp;
|
2001-01-29 11:06:26 +00:00
|
|
|
|
2008-06-29 13:17:01 +00:00
|
|
|
ifp = if_alloc(IFT_LOOP);
|
|
|
|
if (ifp == NULL)
|
2005-06-10 16:49:24 +00:00
|
|
|
return (ENOSPC);
|
|
|
|
|
|
|
|
if_initname(ifp, ifc->ifc_name, unit);
|
|
|
|
ifp->if_mtu = LOMTU;
|
|
|
|
ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
|
|
|
|
ifp->if_ioctl = loioctl;
|
|
|
|
ifp->if_output = looutput;
|
|
|
|
ifp->if_snd.ifq_maxlen = ifqmaxlen;
|
|
|
|
if_attach(ifp);
|
2005-06-26 18:11:11 +00:00
|
|
|
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
|
Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).
This is the first in a series of commits over the course
of the next few weeks.
Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.
We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.
Obtained from: //depot/projects/vimage-commit2/...
Reviewed by: brooks, des, ed, mav, julian,
jamie, kris, rwatson, zec, ...
(various people I forgot, different versions)
md5 (with a bit of help)
Sponsored by: NLnet Foundation, The FreeBSD Foundation
X-MFC after: never
V_Commit_Message_Reviewed_By: more people than the patch
2008-08-17 23:27:27 +00:00
|
|
|
if (V_loif == NULL)
|
|
|
|
V_loif = ifp;
|
2002-03-11 09:26:07 +00:00
|
|
|
|
|
|
|
return (0);
|
2001-01-29 11:06:26 +00:00
|
|
|
}
|
|
|
|
|
2001-01-31 07:58:58 +00:00
|
|
|
static int
|
2008-05-09 20:38:25 +00:00
|
|
|
loop_modevent(module_t mod, int type, void *data)
|
|
|
|
{
|
2008-11-26 22:32:07 +00:00
|
|
|
INIT_VNET_NET(curvnet);
|
2008-04-07 01:43:30 +00:00
|
|
|
|
2008-05-09 20:38:25 +00:00
|
|
|
switch (type) {
|
|
|
|
case MOD_LOAD:
|
2008-11-19 09:39:34 +00:00
|
|
|
V_loif = NULL;
|
2002-03-04 21:46:00 +00:00
|
|
|
if_clone_attach(&lo_cloner);
|
2008-05-09 20:38:25 +00:00
|
|
|
break;
|
2008-04-07 01:43:30 +00:00
|
|
|
|
2008-05-09 20:38:25 +00:00
|
|
|
case MOD_UNLOAD:
|
|
|
|
printf("loop module unload - not possible for this module type\n");
|
2008-04-07 01:43:30 +00:00
|
|
|
return (EINVAL);
|
|
|
|
|
2004-07-15 08:26:07 +00:00
|
|
|
default:
|
2008-04-07 01:43:30 +00:00
|
|
|
return (EOPNOTSUPP);
|
2008-05-09 20:38:25 +00:00
|
|
|
}
|
2008-04-07 01:43:30 +00:00
|
|
|
return (0);
|
2008-05-09 20:38:25 +00:00
|
|
|
}
|
2001-01-31 07:58:58 +00:00
|
|
|
|
2008-05-09 20:38:25 +00:00
|
|
|
static moduledata_t loop_mod = {
|
|
|
|
"loop",
|
|
|
|
loop_modevent,
|
2001-01-31 07:58:58 +00:00
|
|
|
0
|
2008-05-09 20:38:25 +00:00
|
|
|
};
|
2001-01-31 07:58:58 +00:00
|
|
|
|
2003-10-27 04:16:32 +00:00
|
|
|
DECLARE_MODULE(loop, loop_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY);
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1999-12-07 17:39:16 +00:00
|
|
|
int
|
2008-04-07 01:43:30 +00:00
|
|
|
looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
|
|
|
|
struct rtentry *rt)
|
1998-06-12 03:48:19 +00:00
|
|
|
{
|
2005-06-26 18:11:11 +00:00
|
|
|
u_int32_t af;
|
|
|
|
|
2003-04-08 14:25:47 +00:00
|
|
|
M_ASSERTPKTHDR(m); /* check if we have the packet header */
|
1998-06-12 03:48:19 +00:00
|
|
|
|
|
|
|
if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
|
|
|
|
m_freem(m);
|
|
|
|
return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
|
|
|
|
rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
|
|
|
|
}
|
1999-11-22 02:45:11 +00:00
|
|
|
|
1998-06-12 03:48:19 +00:00
|
|
|
ifp->if_opackets++;
|
|
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
2005-06-26 18:11:11 +00:00
|
|
|
|
|
|
|
/* BPF writes need to be handled specially. */
|
|
|
|
if (dst->sa_family == AF_UNSPEC) {
|
|
|
|
bcopy(dst->sa_data, &af, sizeof(af));
|
|
|
|
dst->sa_family = af;
|
|
|
|
}
|
|
|
|
|
1998-06-14 20:58:17 +00:00
|
|
|
#if 1 /* XXX */
|
|
|
|
switch (dst->sa_family) {
|
|
|
|
case AF_INET:
|
1999-11-22 02:45:11 +00:00
|
|
|
case AF_INET6:
|
1998-06-14 20:58:17 +00:00
|
|
|
case AF_IPX:
|
|
|
|
case AF_APPLETALK:
|
1998-06-14 23:53:43 +00:00
|
|
|
break;
|
1998-06-14 20:58:17 +00:00
|
|
|
default:
|
2000-09-04 21:46:27 +00:00
|
|
|
printf("looutput: af=%d unexpected\n", dst->sa_family);
|
1998-06-14 20:58:17 +00:00
|
|
|
m_freem(m);
|
|
|
|
return (EAFNOSUPPORT);
|
|
|
|
}
|
|
|
|
#endif
|
2008-04-07 01:43:30 +00:00
|
|
|
return (if_simloop(ifp, m, dst->sa_family, 0));
|
1998-06-12 03:48:19 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* if_simloop()
|
|
|
|
*
|
|
|
|
* This function is to support software emulation of hardware loopback,
|
|
|
|
* i.e., for interfaces with the IFF_SIMPLEX attribute. Since they can't
|
|
|
|
* hear their own broadcasts, we create a copy of the packet that we
|
|
|
|
* would normally receive via a hardware loopback.
|
|
|
|
*
|
|
|
|
* This function expects the packet to include the media header of length hlen.
|
|
|
|
*/
|
|
|
|
int
|
2008-04-07 01:43:30 +00:00
|
|
|
if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
Step 1.5 of importing the network stack virtualization infrastructure
from the vimage project, as per plan established at devsummit 08/08:
http://wiki.freebsd.org/Image/Notes200808DevSummit
Introduce INIT_VNET_*() initializer macros, VNET_FOREACH() iterator
macros, and CURVNET_SET() context setting macros, all currently
resolving to NOPs.
Prepare for virtualization of selected SYSCTL objects by introducing a
family of SYSCTL_V_*() macros, currently resolving to their global
counterparts, i.e. SYSCTL_V_INT() == SYSCTL_INT().
Move selected #defines from sys/sys/vimage.h to newly introduced header
files specific to virtualized subsystems (sys/net/vnet.h,
sys/netinet/vinet.h etc.).
All the changes are verified to have zero functional impact at this
point in time by doing MD5 comparision between pre- and post-change
object files(*).
(*) netipsec/keysock.c did not validate depending on compile time options.
Implemented by: julian, bz, brooks, zec
Reviewed by: julian, bz, brooks, kris, rwatson, ...
Approved by: julian (mentor)
Obtained from: //depot/projects/vimage-commit2/...
X-MFC after: never
Sponsored by: NLnet Foundation, The FreeBSD Foundation
2008-10-02 15:37:58 +00:00
|
|
|
INIT_VNET_NET(ifp->if_vnet);
|
Lock down the network interface queues. The queue mutex must be obtained
before adding/removing packets from the queue. Also, the if_obytes and
if_omcasts fields should only be manipulated under protection of the mutex.
IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on
the queue. An IF_LOCK macro is provided, as well as the old (mutex-less)
versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which
needs them, but their use is discouraged.
Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF,
which takes care of locking/enqueue, and also statistics updating/start
if necessary.
2000-11-25 07:35:38 +00:00
|
|
|
int isr;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2003-04-08 14:25:47 +00:00
|
|
|
M_ASSERTPKTHDR(m);
|
2003-10-29 05:40:07 +00:00
|
|
|
m_tag_delete_nonpersistent(m);
|
1998-06-12 03:48:19 +00:00
|
|
|
m->m_pkthdr.rcvif = ifp;
|
2000-05-24 21:16:56 +00:00
|
|
|
|
2006-09-22 01:31:22 +00:00
|
|
|
/*
|
|
|
|
* Let BPF see incoming packet in the following manner:
|
2008-05-09 20:38:25 +00:00
|
|
|
* - Emulated packet loopback for a simplex interface
|
2006-09-22 01:31:22 +00:00
|
|
|
* (net/if_ethersubr.c)
|
|
|
|
* -> passes it to ifp's BPF
|
|
|
|
* - IPv4/v6 multicast packet loopback (netinet(6)/ip(6)_output.c)
|
|
|
|
* -> not passes it to any BPF
|
|
|
|
* - Normal packet loopback from myself to myself (net/if_loop.c)
|
|
|
|
* -> passes to lo0's BPF (even in case of IPv6, where ifp!=lo0)
|
|
|
|
*/
|
|
|
|
if (hlen > 0) {
|
|
|
|
if (bpf_peers_present(ifp->if_bpf)) {
|
2003-12-28 03:56:00 +00:00
|
|
|
bpf_mtap(ifp->if_bpf, m);
|
2006-09-22 01:31:22 +00:00
|
|
|
}
|
|
|
|
} else {
|
Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).
This is the first in a series of commits over the course
of the next few weeks.
Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.
We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.
Obtained from: //depot/projects/vimage-commit2/...
Reviewed by: brooks, des, ed, mav, julian,
jamie, kris, rwatson, zec, ...
(various people I forgot, different versions)
md5 (with a bit of help)
Sponsored by: NLnet Foundation, The FreeBSD Foundation
X-MFC after: never
V_Commit_Message_Reviewed_By: more people than the patch
2008-08-17 23:27:27 +00:00
|
|
|
if (bpf_peers_present(V_loif->if_bpf)) {
|
|
|
|
if ((m->m_flags & M_MCAST) == 0 || V_loif == ifp) {
|
2006-09-22 01:31:22 +00:00
|
|
|
/* XXX beware sizeof(af) != 4 */
|
2008-08-01 09:41:45 +00:00
|
|
|
u_int32_t af1 = af;
|
2006-09-22 01:31:22 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We need to prepend the address family.
|
|
|
|
*/
|
Commit step 1 of the vimage project, (network stack)
virtualization work done by Marko Zec (zec@).
This is the first in a series of commits over the course
of the next few weeks.
Mark all uses of global variables to be virtualized
with a V_ prefix.
Use macros to map them back to their global names for
now, so this is a NOP change only.
We hope to have caught at least 85-90% of what is needed
so we do not invalidate a lot of outstanding patches again.
Obtained from: //depot/projects/vimage-commit2/...
Reviewed by: brooks, des, ed, mav, julian,
jamie, kris, rwatson, zec, ...
(various people I forgot, different versions)
md5 (with a bit of help)
Sponsored by: NLnet Foundation, The FreeBSD Foundation
X-MFC after: never
V_Commit_Message_Reviewed_By: more people than the patch
2008-08-17 23:27:27 +00:00
|
|
|
bpf_mtap2(V_loif->if_bpf, &af1, sizeof(af1), m);
|
2006-09-22 01:31:22 +00:00
|
|
|
}
|
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
1998-06-12 03:48:19 +00:00
|
|
|
/* Strip away media header */
|
1998-07-12 16:46:52 +00:00
|
|
|
if (hlen > 0) {
|
2000-05-26 13:47:02 +00:00
|
|
|
m_adj(m, hlen);
|
2007-02-09 00:09:35 +00:00
|
|
|
#ifndef __NO_STRICT_ALIGNMENT
|
2006-05-12 05:04:46 +00:00
|
|
|
/*
|
|
|
|
* Some archs do not like unaligned data, so
|
|
|
|
* we move data down in the first mbuf.
|
|
|
|
*/
|
2000-05-26 13:47:02 +00:00
|
|
|
if (mtod(m, vm_offset_t) & 3) {
|
2000-06-02 19:06:33 +00:00
|
|
|
KASSERT(hlen >= 3, ("if_simloop: hlen too small"));
|
2008-05-09 20:38:25 +00:00
|
|
|
bcopy(m->m_data,
|
|
|
|
(char *)(mtod(m, vm_offset_t)
|
2000-05-26 13:47:02 +00:00
|
|
|
- (mtod(m, vm_offset_t) & 3)),
|
|
|
|
m->m_len);
|
2004-07-28 06:59:55 +00:00
|
|
|
m->m_data -= (mtod(m,vm_offset_t) & 3);
|
2000-05-26 13:47:02 +00:00
|
|
|
}
|
1998-07-12 16:46:52 +00:00
|
|
|
#endif
|
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2000-05-24 21:16:56 +00:00
|
|
|
/* Deliver to upper layer protocol */
|
|
|
|
switch (af) {
|
1994-05-24 10:09:53 +00:00
|
|
|
#ifdef INET
|
|
|
|
case AF_INET:
|
|
|
|
isr = NETISR_IP;
|
|
|
|
break;
|
|
|
|
#endif
|
1999-11-22 02:45:11 +00:00
|
|
|
#ifdef INET6
|
|
|
|
case AF_INET6:
|
|
|
|
m->m_flags |= M_LOOP;
|
|
|
|
isr = NETISR_IPV6;
|
|
|
|
break;
|
|
|
|
#endif
|
1995-10-26 20:31:59 +00:00
|
|
|
#ifdef IPX
|
|
|
|
case AF_IPX:
|
|
|
|
isr = NETISR_IPX;
|
|
|
|
break;
|
|
|
|
#endif
|
1996-05-24 01:35:45 +00:00
|
|
|
#ifdef NETATALK
|
|
|
|
case AF_APPLETALK:
|
2003-03-04 23:19:55 +00:00
|
|
|
isr = NETISR_ATALK2;
|
1996-05-24 01:35:45 +00:00
|
|
|
break;
|
2001-09-10 01:33:03 +00:00
|
|
|
#endif
|
1994-05-24 10:09:53 +00:00
|
|
|
default:
|
2000-05-24 21:16:56 +00:00
|
|
|
printf("if_simloop: can't handle af=%d\n", af);
|
1994-05-24 10:09:53 +00:00
|
|
|
m_freem(m);
|
|
|
|
return (EAFNOSUPPORT);
|
|
|
|
}
|
|
|
|
ifp->if_ipackets++;
|
|
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
2004-08-27 18:33:08 +00:00
|
|
|
netisr_queue(isr, m); /* mbuf is free'd on failure. */
|
1994-05-24 10:09:53 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
1995-12-09 20:47:15 +00:00
|
|
|
static void
|
2008-04-07 01:43:30 +00:00
|
|
|
lortrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2008-04-07 01:43:30 +00:00
|
|
|
|
2003-10-04 03:44:50 +00:00
|
|
|
RT_LOCK_ASSERT(rt);
|
2005-02-24 01:34:01 +00:00
|
|
|
rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Process an ioctl request.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1999-12-07 17:39:16 +00:00
|
|
|
int
|
2008-04-07 01:43:30 +00:00
|
|
|
loioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2008-04-07 01:43:30 +00:00
|
|
|
struct ifaddr *ifa;
|
|
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
|
|
int error = 0;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFADDR:
|
2005-08-09 10:20:02 +00:00
|
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
1994-05-24 10:09:53 +00:00
|
|
|
ifa = (struct ifaddr *)data;
|
1996-02-05 19:34:27 +00:00
|
|
|
ifa->ifa_rtrequest = lortrequest;
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Everything else is done at a higher level.
|
|
|
|
*/
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SIOCADDMULTI:
|
|
|
|
case SIOCDELMULTI:
|
|
|
|
if (ifr == 0) {
|
|
|
|
error = EAFNOSUPPORT; /* XXX */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
|
|
|
|
|
|
#ifdef INET
|
|
|
|
case AF_INET:
|
|
|
|
break;
|
|
|
|
#endif
|
1999-11-22 02:45:11 +00:00
|
|
|
#ifdef INET6
|
|
|
|
case AF_INET6:
|
|
|
|
break;
|
|
|
|
#endif
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
default:
|
|
|
|
error = EAFNOSUPPORT;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
1994-08-08 12:09:04 +00:00
|
|
|
case SIOCSIFMTU:
|
1999-08-06 16:46:29 +00:00
|
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
1994-08-08 12:09:04 +00:00
|
|
|
break;
|
|
|
|
|
1998-04-30 19:37:00 +00:00
|
|
|
case SIOCSIFFLAGS:
|
|
|
|
break;
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
default:
|
|
|
|
error = EINVAL;
|
|
|
|
}
|
|
|
|
return (error);
|
|
|
|
}
|