diff options
| author |   Stéphane Veyret <sveyret@gmail.com> | 2019-05-25 15:30:58 +0200 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2019-06-17 16:35:20 +0200 |
| commit | 857b46027d6f91150797295752581b7155b9d0e1 (patch) | |
| tree | c3408c8afa62515ec21cfc5f007af55ea8291dc5 /include | |
| parent | netfilter: ipv6: Fix undefined symbol nf_ct_frag6_gather (diff) | |
| download | linux-dev-857b46027d6f91150797295752581b7155b9d0e1.tar.xz linux-dev-857b46027d6f91150797295752581b7155b9d0e1.zip | |
netfilter: nft_ct: add ct expectations support
This patch allows to add, list and delete expectations via nft objref
infrastructure and assigning these expectations via nft rule.
This allows manual port triggering when no helper is defined to manage a
specific protocol. For example, if I have an online game which protocol
is based on initial connection to TCP port 9753 of the server, and where
the server opens a connection to port 9876, I can set rules as follow:
table ip filter {
ct expectation mygame {
protocol udp;
dport 9876;
timeout 2m;
size 1;
}
chain input {
type filter hook input priority 0; policy drop;
tcp dport 9753 ct expectation set "mygame";
}
chain output {
type filter hook output priority 0; policy drop;
udp dport 9876 ct status expected accept;
}
}
Signed-off-by: Stéphane Veyret <sveyret@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 505393c6e959..31a6b8f7ff73 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -1445,6 +1445,17 @@ enum nft_ct_timeout_timeout_attributes { }; #define NFTA_CT_TIMEOUT_MAX (__NFTA_CT_TIMEOUT_MAX - 1) +enum nft_ct_expectation_attributes { + NFTA_CT_EXPECT_UNSPEC, + NFTA_CT_EXPECT_L3PROTO, + NFTA_CT_EXPECT_L4PROTO, + NFTA_CT_EXPECT_DPORT, + NFTA_CT_EXPECT_TIMEOUT, + NFTA_CT_EXPECT_SIZE, + __NFTA_CT_EXPECT_MAX, +}; +#define NFTA_CT_EXPECT_MAX (__NFTA_CT_EXPECT_MAX - 1) + #define NFT_OBJECT_UNSPEC 0 #define NFT_OBJECT_COUNTER 1 #define NFT_OBJECT_QUOTA 2 @@ -1454,7 +1465,8 @@ enum nft_ct_timeout_timeout_attributes { #define NFT_OBJECT_TUNNEL 6 #define NFT_OBJECT_CT_TIMEOUT 7 #define NFT_OBJECT_SECMARK 8 -#define __NFT_OBJECT_MAX 9 +#define NFT_OBJECT_CT_EXPECT 9 +#define __NFT_OBJECT_MAX 10 #define NFT_OBJECT_MAX (__NFT_OBJECT_MAX - 1) /** |