linux.git/net/netfilter/nft_synproxy.c, branch v6.16

netfilter: nf_tables: drop unused 3rd argument from validate callback ops

2024-09-03T08:47:17+00:00

Since commit a654de8fdc18 ("netfilter: nf_tables: fix chain dependency validation")
the validate() callback no longer needs the return pointer argument.

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

netfilter: nf_tables: validate NFPROTO_* family

2024-01-24T19:02:40+00:00

Several expressions explicitly refer to NF_INET_* hook definitions
from expr->ops->validate, however, family is not validated.

Bail out with EOPNOTSUPP in case they are used from unsupported
families.

Fixes: 0ca743a55991 ("netfilter: nf_tables: add compatibility layer for x_tables")
Fixes: a3c90f7a2323 ("netfilter: nf_tables: flow offload expression")
Fixes: 2fa841938c64 ("netfilter: nf_tables: introduce routing expression")
Fixes: 554ced0a6e29 ("netfilter: nf_tables: add support for native socket matching")
Fixes: ad49d86e07a4 ("netfilter: nf_tables: Add synproxy support")
Fixes: 4ed8eb6570a4 ("netfilter: nf_tables: Add native tproxy support")
Fixes: 6c47260250fc ("netfilter: nf_tables: add xfrm expression")
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: Extend nft_expr_ops::dump callback parameters

2022-11-15T09:46:34+00:00

Add a 'reset' flag just like with nft_object_ops::dump. This will be
useful to reset "anonymous stateful objects", e.g. simple rule counters.

No functional change intended.

Signed-off-by: Phil Sutter 
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: do not reduce read-only expressions

2022-03-19T23:29:46+00:00

Skip register tracking for expressions that perform read-only operations
on the registers. Define and use a cookie pointer NFT_REDUCE_READONLY to
avoid defining stubs for these expressions.

This patch re-enables register tracking which was disabled in ed5f85d42290
("netfilter: nf_tables: disable register tracking"). Follow up patches
add remaining register tracking for existing expressions.

Signed-off-by: Pablo Neira Ayuso

netfilter: nft_synproxy: unregister hooks on init error path

2022-02-10T15:33:57+00:00

Disable the IPv4 hooks if the IPv6 hooks fail to be registered.

Fixes: ad49d86e07a4 ("netfilter: nf_tables: Add synproxy support")
Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: add and use nft_thoff helper

2021-05-28T23:04:54+00:00

This allows to change storage placement later on without changing readers.

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

netfilter: Add MODULE_DESCRIPTION entries to kernel modules

2020-06-24T22:50:31+00:00

The user tool modinfo is used to get information on kernel modules, including a
description where it is available.

This patch adds a brief MODULE_DESCRIPTION to netfilter kernel modules
(descriptions taken from Kconfig file or code comments)

Signed-off-by: Rob Gill 
Signed-off-by: Pablo Neira Ayuso

netfilter: nft_synproxy: add synproxy stateful object support

2019-09-10T20:35:37+00:00

Register a new synproxy stateful object type into the stateful object
infrastructure.

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

netfilter: synproxy: rename mss synproxy_options field

2019-08-03T16:39:08+00:00

After introduce "mss_encode" field in the synproxy_options struct the field
"mss" is a little confusing. It has been renamed to "mss_option".

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

netfilter: synproxy: fix erroneous tcp mss option

2019-07-16T11:17:01+00:00

Now synproxy sends the mss value set by the user on client syn-ack packet
instead of the mss value that client announced.

Fixes: 48b1de4c110a ("netfilter: add SYNPROXY core/target")
Signed-off-by: Fernando Fernandez Mancera 
Signed-off-by: Pablo Neira Ayuso