linux-stable.git/net/netfilter/Kconfig, branch linux-4.7.y

netfilter: tee: select NF_DUP_IPV6 unconditionally

2016-02-08T11:58:28+00:00

The NETFILTER_XT_TARGET_TEE option selects NF_DUP_IPV6 whenever
IP6_NF_IPTABLES is enabled, and it ensures that it cannot be
builtin itself if NF_CONNTRACK is a loadable module, as that
is a dependency for NF_DUP_IPV6.

However, NF_DUP_IPV6 can be enabled even if IP6_NF_IPTABLES is
turned off, and it only really depends on IPV6. With the current
check in tee_tg6, we call nf_dup_ipv6() whenever NF_DUP_IPV6
is enabled. This can however be a loadable module which is
unreachable from a built-in xt_TEE:

net/built-in.o: In function `tee_tg6':
:(.text+0x67728): undefined reference to `nf_dup_ipv6'

The bug was originally introduced in the split of the xt_TEE module
into separate modules for ipv4 and ipv6, and two patches tried
to fix it unsuccessfully afterwards.

This is a revert of the the first incorrect attempt to fix it,
going back to depending on IPV6 as the dependency, and we
adapt the 'select' condition accordingly.

Signed-off-by: Arnd Bergmann 
Fixes: bbde9fc1824a ("netfilter: factor out packet duplication for IPv4/IPv6")
Fixes: 116984a316c3 ("netfilter: xt_TEE: use IS_ENABLED(CONFIG_NF_DUP_IPV6)")
Fixes: 74ec4d55c4d2 ("netfilter: fix xt_TEE and xt_TPROXY dependencies")
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: add forward expression to the netdev family

2016-01-04T16:48:38+00:00

You can use this to forward packets from ingress to the egress path of
the specified interface. This provides a fast path to bounce packets
from one interface to another specific destination interface.

Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: add packet duplication to the netdev family

2016-01-03T20:04:23+00:00

You can use this to duplicate packets and inject them at the egress path
of the specified interface. This duplication allows you to inspect
traffic from the dummy or any other interface dedicated to this purpose.

Signed-off-by: Pablo Neira Ayuso

netfilter: fix xt_TEE and xt_TPROXY dependencies

2015-11-10T22:46:57+00:00

Kconfig is too smart for its own good: a Kconfig line that states

	select NF_DEFRAG_IPV6 if IP6_NF_IPTABLES

means that if IP6_NF_IPTABLES is set to 'm', then NF_DEFRAG_IPV6 will
also be set to 'm', regardless of the state of the symbol from which
it is selected. When the xt_TEE driver is built-in and nothing else
forces NF_DEFRAG_IPV6 to be built-in, this causes a link-time error:

net/built-in.o: In function `tee_tg6':
net/netfilter/xt_TEE.c:46: undefined reference to `nf_dup_ipv6'

This works around that behavior by changing the dependency to
'if IP6_NF_IPTABLES != n', which is interpreted as boolean expression
rather than a tristate and causes the NF_DEFRAG_IPV6 symbol to
be built-in as well.

The bug only occurs once in thousands of 'randconfig' builds and
does not really impact real users. From inspecting the other
surrounding Kconfig symbols, I am guessing that NETFILTER_XT_TARGET_TPROXY
and NETFILTER_XT_MATCH_SOCKET have the same issue. If not, this
change should still be harmless.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Pablo Neira Ayuso

netfilter: nfnetlink_log: allow to attach conntrack

2015-10-05T15:32:14+00:00

This patch enables to include the conntrack information together
with the packet that is sent to user-space via NFLOG, then a
user-space program can acquire NATed information by this NFULA_CT
attribute.

Including the conntrack information is optional, you can set it
via NFULNL_CFG_F_CONNTRACK flag with the NFULA_CFG_FLAGS attribute
like NFQUEUE.

Signed-off-by: Ken-ichirou MATSUZAWA 
Signed-off-by: Pablo Neira Ayuso

netfilter: Kconfig rename QUEUE_CT to GLUE_CT

2015-10-05T15:32:12+00:00

Conntrack information attaching infrastructure is now generic and
update it's name to use `glue' in previous patch. This patch updates
Kconfig symbol name and adding NF_CT_NETLINK dependency.

Signed-off-by: Ken-ichirou MATSUZAWA 
Signed-off-by: Pablo Neira Ayuso

netfilter: factor out packet duplication for IPv4/IPv6

2015-08-07T09:49:49+00:00

Extracted from the xtables TEE target. This creates two new modules for IPv4
and IPv6 that are shared between the TEE target and the new nf_tables dup
expressions.

Signed-off-by: Pablo Neira Ayuso

netfilter: Kconfig: get rid of parens around depends on

2015-06-15T15:26:37+00:00

According to the reporter, they are not needed.

Reported-by: Sergei Shtylyov 
Signed-off-by: Pablo Neira Ayuso

Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

2015-05-31T07:02:30+00:00

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for net-next, they are:

1) default CONFIG_NETFILTER_INGRESS to y for easier compile-testing of all
   options.

2) Allow to bind a table to net_device. This introduces the internal
   NFT_AF_NEEDS_DEV flag to perform a mandatory check for this binding.
   This is required by the next patch.

3) Add the 'netdev' table family, this new table allows you to create ingress
   filter basechains. This provides access to the existing nf_tables features
   from ingress.

4) Kill unused argument from compat_find_calc_{match,target} in ip_tables
   and ip6_tables, from Florian Westphal.
====================

Signed-off-by: David S. Miller

netfilter: nf_tables: add netdev table to filter from ingress

2015-05-26T16:41:23+00:00

This allows us to create netdev tables that contain ingress chains. Use
skb_header_pointer() as we may see shared sk_buffs at this stage.

This change provides access to the existing nf_tables features from the ingress
hook.

Signed-off-by: Pablo Neira Ayuso