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When calling into the wext code from the NETDEV_UP
notifier, we need to hold the devlist_mtx mutex as
the wext code ends up calling into channel checks.
Reported-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This removes the max_bandwidth attribute. It is only ever
written to, and is duplicated by max_bandwidth_khz in the
regulatory code.
Signed-off-by: Pat Erley <pat-lkml@erley.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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"cfg80211: validate channel settings across interfaces"
contained a locking bug -- in the managed-mode SIWFREQ
call it would end up running into a lock recursion.
This fixes it by not checking that particular interface
for a channel that it needs to stay on, which is as it
should be as that's the interface we're setting the
channel for.
Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Reported-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The memory layout for scan requests was rather wrong,
we put the scan SSIDs before the channels which could
lead to the channel pointers being unaligned in memory.
It turns out that using a pointer to the channel array
isn't necessary anyway since we can embed a zero-length
array into the struct.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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If we have a lot of frames to transmit at once, for
instance with fragmentation, it can be an optimisation
to only tell the DMA engine about them on the last
fragment/frame to avoid banging the IO too much. This
patch allows implementation such an optimisation by
telling the driver when more frames can be expected.
Currently, this is used by mac80211 only on fragmented
frames, but could also be used in the future on other
frames when the queue was full and there are multiple
frames pending.
Note that drivers need to be careful when using this
flag, they need to kick their DMA engines not just
when this flag is clear, but also when the queue gets
full so that progress can be made.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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In order for userspace to be able to figure out whether
it obtained a consistent snapshot of data or not when
using netlink dumps, we need to have a generation number
in each dump message that indicates whether the list has
changed or not -- its value is arbitrary.
This patch adds such a number to all dumps, this needs
some mac80211 involvement to keep track of a generation
number to start with when adding/removing mesh paths or
stations.
The wiphy and netdev lists can be fully handled within
cfg80211, of course, but generation numbers need to be
stored there as well.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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With the move of everything related to the SME from
mac80211 to cfg80211, we lost the ability to send
reassociation frames. This adds them back, but only
for wireless extensions. With the userspace SME, it
shall control assoc vs. reassoc (it already can do
so with the nl80211 interface).
I haven't touched the connect() implementation, so
it is not possible to reassociate with the nl80211
connect primitive. I think that should be done with
the NL80211_CMD_ROAM command, but we'll have to see
how that can be handled in the future, especially
with fullmac chips.
This patch addresses only the immediate regression
we had in mac80211, which previously sent reassoc.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Currently, there's a problem that affects regulatory
enforcement and connection stability, in that it is
possible to switch the channel while connected to a
network or joined to an IBSS.
The problem comes from the fact that we only validate
the channel against the current interface's type, not
against any other interface. Thus, you have any type
of interface up, additionally bring up a monitor mode
interface and switch the channel on the monitor. This
will obviously also switch the channel on the other
interface.
The problem now is that if you do that while sending
beacons for IBSS mode, you can switch to a disabled
channel or a channel that doesn't allow beaconing.
Combined with a managed mode interface connected to
an AP instead of an IBSS interface, you can easily
break the connection that way.
To fix this, this patch validates any channel change
with all available interfaces, and disallows such
changes on secondary interfaces if another interface
is connected to an AP or joined to an IBSS.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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With iwconfig there is no way to properly set the ciphers when trying to
connect to a WEP SSID. Although mac80211 based drivers dont need it, several
fullmac drivers do.
This patch basically sets the WEP ciphers whenever they're not set at all.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When an AP disassociates us, we currently go into a weird
state because the SME doesn't handle authenticated but not
associated well unless it's within its own state machine,
it can't recover from that. However, it shouldn't need to,
since we don't do any decisions in it really -- so when we
get disconnected, simply deauthenticate too.
Reported-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When reporting a disconnection to userspace, we try
to report whether it was from the AP or by our own
choice. However, we misreported a broadcast deauth
or disassoc as being by own choice, which is wrong.
Fix this by checking the sender address instead of
the destination address.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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After being disassociated by the AP, mac80211 currently
reports this to cfg80211, and then goes to delete the
association. That's fine, but cfg80211 assumes that it's
still authenticated, however, mac80211 throws away all
state.
This fixes mac80211 to keep track of the authentication
in that case so that cfg80211 can request a deauth or
new association properly.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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WARN_ON was triggered at mlme.c:213 when dissociating from an AP.
wdev->current_bss->pub.bssid should be used in place of
wdev->current_bss for BSSID comparison.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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cfg80211 displays correct link info when connected by wext. But if
the connection is setup by cfg80211, wext cannot display the SSID.
This patch fixed this issue.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Mesh is currently disabled on mac80211, its marked
as broken. This patch gets it to compile though,
to account for the mac80211 workqueue changes.
There was a simple typo in the patches for mesh
for the workqueue migration, but we never compile
tested it as we couldn't even select mesh as its
broken. Lets at least let it compile for those
interested in getting it fixed.
Reported-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Conflicts:
arch/sparc/kernel/smp_64.c
arch/x86/kernel/cpu/perf_counter.c
arch/x86/kernel/setup_percpu.c
drivers/cpufreq/cpufreq_ondemand.c
mm/percpu.c
Conflicts in core and arch percpu codes are mostly from commit
ed78e1e078dd44249f88b1dd8c76dafb39567161 which substituted many
num_possible_cpus() with nr_cpu_ids. As for-next branch has moved all
the first chunk allocators into mm/percpu.c, the changes are moved
from arch code to mm/percpu.c.
Signed-off-by: Tejun Heo <tj@kernel.org>
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The networking code checks CAP_SYS_MODULE before using request_module() to
try to load a kernel module. While this seems reasonable it's actually
weakening system security since we have to allow CAP_SYS_MODULE for things
like /sbin/ip and bluetoothd which need to be able to trigger module loads.
CAP_SYS_MODULE actually grants those binaries the ability to directly load
any code into the kernel. We should instead be protecting modprobe and the
modules on disk, rather than granting random programs the ability to load code
directly into the kernel. Instead we are going to gate those networking checks
on CAP_NET_ADMIN which still limits them to root but which does not grant
those processes the ability to load arbitrary code into the kernel.
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Paul Moore <paul.moore@hp.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: James Morris <jmorris@namei.org>
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This patch addresses:
* assigning -1 to np->tclass as it is currently done is not very meaningful,
since it turns into 0xff;
* RFC 3542, 6.5 allows -1 for clearing the sticky IPV6_TCLASS option
and specifies -1 to mean "use kernel default":
- RFC 2460, 7. requires that the default traffic class must be zero for
all 8 bits,
- this is consistent with RFC 2474, 4.1 which recommends a default PHB of 0,
in combination with a value of the ECN field of "non-ECT" (RFC 3168, 5.).
This patch changes the meaning of -1 from assigning 255 to mean the RFC 2460
default, which at the same time allows to satisfy clearing the sticky TCLASS
option as per RFC 3542, 6.5.
(When passing -1 as ancillary data, the fallback remains np->tclass, which
has either been set via socket options, or contains the default value.)
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This replaces assignments of the type "int on LHS" = "u8 on RHS" with
simpler code. The LHS can express all of the unsigned right hand side
values, hence the assigned value can not be negative.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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skb allocation / cosumption tracer - Add consumption tracepoint
This patch adds a tracepoint to skb_copy_datagram_iovec, which is called each
time a userspace process copies a frame from a socket receive queue to a user
space buffer. It allows us to hook in and examine each sk_buff that the system
receives on a per-socket bases, and can be use to compile a list of which skb's
were received by which processes.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
include/trace/events/skb.h | 20 ++++++++++++++++++++
net/core/datagram.c | 3 +++
2 files changed, 23 insertions(+)
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds a 'hairpin' (also called 'reflective relay') mode
port configuration to the Linux Ethernet bridge kernel module.
A bridge supporting hairpin forwarding mode can send frames back
out through the port the frame was received on.
Hairpin mode is required to support basic VEPA (Virtual
Ethernet Port Aggregator) capabilities.
You can find additional information on VEPA here:
http://tech.groups.yahoo.com/group/evb/
http://www.ieee802.org/1/files/public/docs2009/new-hudson-vepa_seminar-20090514d.pdf
http://www.internet2.edu/presentations/jt2009jul/20090719-congdon.pdf
An additional patch 'bridge-utils: Add 'hairpin' port forwarding mode'
is provided to allow configuring hairpin mode from userspace tools.
Signed-off-by: Paul Congdon <paul.congdon@hp.com>
Signed-off-by: Anna Fischer <anna.fischer@hp.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If an interface has multiple addresses, the current message for DAD
failure isn't really helpful, so this patch adds the address itself to
the printk.
Signed-off-by: Jens Rosenboom <jens@mcbone.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We splice skbs from the pending queue for a TID
onto the local pending queue when tearing down a
block ack request. This is not necessary unless we
actually have received a request to start a block ack
request (rate control, for example). If we never received
that request we should not be splicing the tid pending
queue as it would be null, causing a panic.
Not sure yet how exactly we allowed through a call when the
tid state does not have at least HT_ADDBA_REQUESTED_MSK set,
that will require some further review as it is not quite
obvious.
For more information see the bug report:
http://bugzilla.kernel.org/show_bug.cgi?id=13922
This fixes this oops:
BUG: unable to handle kernel NULL pointer dereference at 00000030
IP: [<f8806c70>] ieee80211_agg_splice_packets+0x40/0xc0 [mac80211]
*pdpt = 0000000002d1e001 *pde = 0000000000000000
Thread overran stack, or stack corrupted
Oops: 0000 [#1] SMP
last sysfs file: /sys/module/aes_generic/initstate
Modules linked in: <bleh>
Pid: 0, comm: swapper Not tainted (2.6.31-rc5-wl #2) Dell DV051
EIP: 0060:[<f8806c70>] EFLAGS: 00010292 CPU: 0
EIP is at ieee80211_agg_splice_packets+0x40/0xc0 [mac80211]
EAX: 00000030 EBX: 0000004c ECX: 00000003 EDX: 00000000
ESI: c1c98000 EDI: f745a1c0 EBP: c076be58 ESP: c076be38
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c076a000 task=c0709160 task.ti=c076a000)
Stack: <bleh2>
Call Trace:
[<f8806edb>] ? ieee80211_stop_tx_ba_cb+0xab/0x150 [mac80211]
[<f8802f1e>] ? ieee80211_tasklet_handler+0xce/0x110 [mac80211]
[<c04862ff>] ? net_rx_action+0xef/0x1d0
[<c0149378>] ? tasklet_action+0x58/0xc0
[<c014a0f2>] ? __do_softirq+0xc2/0x190
[<c018eb48>] ? handle_IRQ_event+0x58/0x140
[<c01205fe>] ? ack_apic_level+0x7e/0x270
[<c014a1fd>] ? do_softirq+0x3d/0x40
[<c014a345>] ? irq_exit+0x65/0x90
[<c010a6af>] ? do_IRQ+0x4f/0xc0
[<c014a35d>] ? irq_exit+0x7d/0x90
[<c011d547>] ? smp_apic_timer_interrupt+0x57/0x90
[<c01094a9>] ? common_interrupt+0x29/0x30
[<c010fd9e>] ? mwait_idle+0xbe/0x100
[<c0107e42>] ? cpu_idle+0x52/0x90
[<c054b1a5>] ? rest_init+0x55/0x60
[<c077492d>] ? start_kernel+0x315/0x37d
[<c07743ce>] ? unknown_bootoption+0x0/0x1f9
[<c0774099>] ? i386_start_kernel+0x79/0x81
Code: <bleh3>
EIP: [<f8806c70>] ieee80211_agg_splice_packets+0x40/0xc0 [mac80211] SS:ESP 0068:c076be38
CR2: 0000000000000030
Cc: stable@kernel.org
Testedy-by: Jack Lau <jackelectronics@hotmail.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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kernel_sendpage() does the proper default case handling for when the
socket doesn't have a native sendpage implementation.
Now, arguably this might be something that we could instead solve by
just specifying that all protocols should do it themselves at the
protocol level, but we really only care about the common protocols.
Does anybody really care about sendpage on something like Appletalk? Not
likely.
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Julien TINNES <julien@cr0.org>
Acked-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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seq_open_net() and seq_release() are needed for seq_file_net().
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) fix ro->bound protection by socket lock
2) make ro->bound bit instead of int
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In all rx'd SKB cases, atalk_rcv() either eventually jumps to or falls through
to the label out:, which returns numeric 0. Numeric 0 corresponds to
NET_RX_SUCCESS, which is incorrect in failed SKB cases.
This patch makes atalk_rcv() provide the correct returns by:
o explicitly returning NET_RX_SUCCESS in the two success cases
o having the out: label return NET_RX_DROP, instead of numeric 0
o making the failed SKB labels and processing more consistent with other
_rcv() routines in the kernel, simplifying validation and removing a
backwards goto
Signed-off-by: Mark Smith <markzzzsmith@yahoo.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
arch/microblaze/include/asm/socket.h
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This adds the second check that Rusty wanted to have a long time ago. :-)
Base chain policies must have absolute verdicts that cease processing
in the table, otherwise rule execution may continue in an unexpected
spurious fashion (e.g. next chain that follows in memory).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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This adds a check that iptables's original author Rusty set forth in
a FIXME comment.
Underflows in iptables are better known as chain policies, and are
required to be unconditional or there would be a stochastical chance
for the policy rule to be skipped if it does not match. If that were
to happen, rule execution would continue in an unexpected spurious
fashion.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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The "hook_entry" and "underflow" array contains values even for hooks
not provided, such as PREROUTING in conjunction with the "filter"
table. Usually, the values point to whatever the next rule is. For
the upcoming unconditionality and underflow checking patches however,
we must not inspect that arbitrary rule.
Skipping unassigned hooks seems like a good idea, also because
newinfo->hook_entry and newinfo->underflow will then continue to have
the poison value for detecting abnormalities.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Instead of inspecting each u32/char open-coded, clean up and make use
of memcmp. On some arches, memcmp is implemented as assembly or GCC's
__builtin_memcmp which can possibly take advantages of known
alignment.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Simple substitution to indicate that the fields indeed use the
NFPROTO_ space.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_owner v1 (v2.6.24-2388-g0265ab4).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_mark v1 (v2.6.24-2922-g17b0d7e).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_iprange v1 (v2.6.24-2928-g1a50c5a1).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_conntrack v1 (v2.6.24-2921-g64eb12f).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_connmark v1 (v2.6.24-2919-g96e3227).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_MARK v2 (v2.6.24-2918-ge0a812a).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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Superseded by xt_CONNMARK v1 (v2.6.24-2917-g0dc8c76).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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