linux.git/net/netfilter/Kconfig, branch v5.0

netfilter: nat: remove l4proto->manip_pkt

2018-12-17T22:33:29+00:00

This removes the last l4proto indirection, the two callers, the l3proto
packet mangling helpers for ipv4 and ipv6, now call the
nf_nat_l4proto_manip_pkt() helper.

nf_nat_proto_{dccp,tcp,sctp,gre,icmp,icmpv6} are left behind, even though
they contain no functionality anymore to not clutter this patch.

Next patch will remove the empty files and the nf_nat_l4proto
struct.

nf_nat_proto_udp.c is renamed to nf_nat_proto.c, as it now contains the
other nat manip functionality as well, not just udp and udplite.

Signed-off-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: add xfrm expression

2018-09-17T09:40:08+00:00

supports fetching saddr/daddr of tunnel mode states, request id and spi.
If direction is 'in', use inbound skb secpath, else dst->xfrm.

Joint work with Máté Eckl.

Signed-off-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso

netfilter: xt_checksum: ignore gso skbs

2018-08-24T07:58:16+00:00

Satish Patel reports a skb_warn_bad_offload() splat caused
by -j CHECKSUM rules:

-A POSTROUTING -p tcp -m tcp --sport 80 -j CHECKSUM

The CHECKSUM target has never worked with GSO skbs, and the above rule
makes no sense as kernel will handle checksum updates on transmit.

Unfortunately, there are 3rd party tools that install such rules, so we
cannot reject this from the config plane without potential breakage.

Amend Kconfig text to clarify that the CHECKSUM target is only useful
in virtualized environments, where old dhcp clients that use AF_PACKET
used to discard UDP packets with a 'bad' header checksum and add a
one-time warning in case such rule isn't restricted to UDP.

v2: check IP6T_F_PROTO flag before cmp (Michal Kubecek)

Reported-by: Satish Patel 
Reported-by: Markos Chandras 
Reported-by: Michal Kubecek 
Signed-off-by: Florian Westphal 
Reviewed-by: Michal Kubecek 
Signed-off-by: Pablo Neira Ayuso

netfilter: kconfig: remove ct zone/label dependencies

2018-08-03T19:15:12+00:00

connection tracking zones currently depend on the xtables CT target.
The reasoning was that it makes no sense to support zones if they can't
be configured (which needed CT target).

Nowadays zones can also be used by OVS and configured via nftables,
so remove the dependency.

connection tracking labels are handled via hidden dependency that gets
auto-selected by the connlabel match.
Make it a visible knob, as labels can be attached via ctnetlink
or via nftables rules (nft_ct expression) too.

This allows to use conntrack labels and zones with nftables-only build.

Signed-off-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: add tunnel support

2018-08-03T19:12:12+00:00

This patch implements the tunnel object type that can be used to
configure tunnels via metadata template through the existing lightweight
API from the ingress path.

Signed-off-by: Pablo Neira Ayuso

netfilter: cttimeout: Make NF_CT_NETLINK_TIMEOUT depend on NF_CONNTRACK_TIMEOUT

2018-08-03T16:50:41+00:00

With this, remove ifdef for CONFIG_NF_CONNTRACK_TIMEOUT in
nfnetlink_cttimeout. This is also required for moving ctnl_untimeout
from nfnetlink_cttimeout to nf_conntrack_timeout.

Signed-off-by: Harsha Sharma 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: Add native tproxy support

2018-07-30T12:07:12+00:00

A great portion of the code is taken from xt_TPROXY.c

There are some changes compared to the iptables implementation:
 - tproxy statement is not terminal here
 - Either address or port has to be specified, but at least one of them
   is necessary. If one of them is not specified, the evaluation will be
   performed with the original attribute of the packet (ie. target port
   is not specified => the packet's dport will be used).

To make this work in inet tables, the tproxy structure has a family
member (typically called priv->family) which is not necessarily equal to
ctx->family.

priv->family can have three values legally:
 - NFPROTO_IPV4 if the table family is ip OR if table family is inet,
   but an ipv4 address is specified as a target address. The rule only
   evaluates ipv4 packets in this case.
 - NFPROTO_IPV6 if the table family is ip6 OR if table family is inet,
   but an ipv6 address is specified as a target address. The rule only
   evaluates ipv6 packets in this case.
 - NFPROTO_UNSPEC if the table family is inet AND if only the port is
   specified. The rule will evaluate both ipv4 and ipv6 packets.

Signed-off-by: Máté Eckl 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: implement Passive OS fingerprint module in nft_osf

2018-07-30T12:07:11+00:00

Add basic module functions into nft_osf.[ch] in order to implement OSF
module in nf_tables.

Signed-off-by: Fernando Fernandez Mancera 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_osf: rename nf_osf.c to nfnetlink_osf.c

2018-07-30T12:07:10+00:00

Rename nf_osf.c to nfnetlink_osf.c as we introduce nfnetlink_osf which is
the OSF infraestructure.

Signed-off-by: Fernando Fernandez Mancera 
Signed-off-by: Pablo Neira Ayuso

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

2018-07-21T05:28:28+00:00

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for your net-next
tree:

1) No need to set ttl from reject action for the bridge family, from
   Taehee Yoo.

2) Use a fixed timeout for flow that are passed up from the flowtable
   to conntrack, from Florian Westphal.

3) More preparation patches for tproxy support for nf_tables, from Mate
   Eckl.

4) Remove unnecessary indirection in core IPv6 checksum function, from
   Florian Westphal.

5) Use nf_ct_get_tuplepr() from openvswitch, instead of opencoding it.
   From Florian Westphal.

6) socket match now selects socket infrastructure, instead of depending
   on it. From Mate Eckl.

7) Patch series to simplify conntrack tuple building/parsing from packet
   path and ctnetlink, from Florian Westphal.

8) Fetch timeout policy from protocol helpers, instead of doing it from
   core, from Florian Westphal.

9) Merge IPv4 and IPv6 protocol trackers into conntrack core, from
   Florian Westphal.

10) Depend on CONFIG_NF_TABLES_IPV6 and CONFIG_IP6_NF_IPTABLES
    respectively, instead of IPV6. Patch from Mate Eckl.

11) Add specific function for garbage collection in conncount,
    from Yi-Hung Wei.

12) Catch number of elements in the connlimit list, from Yi-Hung Wei.

13) Move locking to nf_conncount, from Yi-Hung Wei.

14) Series of patches to add lockless tree traversal in nf_conncount,
    from Yi-Hung Wei.

15) Resolve clash in matching conntracks when race happens, from
    Martynas Pumputis.

16) If connection entry times out, remove template entry from the
    ip_vs_conn_tab table to improve behaviour under flood, from
    Julian Anastasov.

17) Remove useless parameter from nf_ct_helper_ext_add(), from Gao feng.

18) Call abort from 2-phase commit protocol before requesting modules,
    make sure this is done under the mutex, from Florian Westphal.

19) Grab module reference when starting transaction, also from Florian.

20) Dynamically allocate expression info array for pre-parsing, from
    Florian.

21) Add per netns mutex for nf_tables, from Florian Westphal.

22) A couple of patches to simplify and refactor nf_osf code to prepare
    for nft_osf support.

23) Break evaluation on missing socket, from Mate Eckl.

24) Allow to match socket mark from nft_socket, from Mate Eckl.

25) Remove dependency on nf_defrag_ipv6, now that IPv6 tracker is
    built-in into nf_conntrack. From Florian Westphal.
====================

Signed-off-by: David S. Miller