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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-09-26 14:35:14 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-10-02 18:29:57 +0200 |
| commit | 51b0a5d8c21a91801bbef9bcc8639dc0b206c6cd (patch) | |
| tree | 62255f89e7725a5173d4b4e4f002f114ad524dda /include/uapi | |
| parent | 2c804d0f8fc7799981d9fdd8c88653541b28c1a7 (diff) | |
| download | blackbird-op-linux-51b0a5d8c21a91801bbef9bcc8639dc0b206c6cd.tar.gz blackbird-op-linux-51b0a5d8c21a91801bbef9bcc8639dc0b206c6cd.zip | |
netfilter: nft_reject: introduce icmp code abstraction for inet and bridge
This patch introduces the NFT_REJECT_ICMPX_UNREACH type which provides
an abstraction to the ICMP and ICMPv6 codes that you can use from the
inet and bridge tables, they are:
* NFT_REJECT_ICMPX_NO_ROUTE: no route to host - network unreachable
* NFT_REJECT_ICMPX_PORT_UNREACH: port unreachable
* NFT_REJECT_ICMPX_HOST_UNREACH: host unreachable
* NFT_REJECT_ICMPX_ADMIN_PROHIBITED: administratevely prohibited
You can still use the specific codes when restricting the rule to match
the corresponding layer 3 protocol.
I decided to not overload the existing NFT_REJECT_ICMP_UNREACH to have
different semantics depending on the table family and to allow the user
to specify ICMP family specific codes if they restrict it to the
corresponding family.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index b72ccfeaf865..c26df6787fb0 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -749,13 +749,34 @@ enum nft_queue_attributes { * * @NFT_REJECT_ICMP_UNREACH: reject using ICMP unreachable * @NFT_REJECT_TCP_RST: reject using TCP RST + * @NFT_REJECT_ICMPX_UNREACH: abstracted ICMP unreachable for bridge and inet */ enum nft_reject_types { NFT_REJECT_ICMP_UNREACH, NFT_REJECT_TCP_RST, + NFT_REJECT_ICMPX_UNREACH, }; /** + * enum nft_reject_code - Generic reject codes for IPv4/IPv6 + * + * @NFT_REJECT_ICMPX_NO_ROUTE: no route to host / network unreachable + * @NFT_REJECT_ICMPX_PORT_UNREACH: port unreachable + * @NFT_REJECT_ICMPX_HOST_UNREACH: host unreachable + * @NFT_REJECT_ICMPX_ADMIN_PROHIBITED: administratively prohibited + * + * These codes are mapped to real ICMP and ICMPv6 codes. + */ +enum nft_reject_inet_code { + NFT_REJECT_ICMPX_NO_ROUTE = 0, + NFT_REJECT_ICMPX_PORT_UNREACH, + NFT_REJECT_ICMPX_HOST_UNREACH, + NFT_REJECT_ICMPX_ADMIN_PROHIBITED, + __NFT_REJECT_ICMPX_MAX +}; +#define NFT_REJECT_ICMPX_MAX (__NFT_REJECT_ICMPX_MAX + 1) + +/** * enum nft_reject_attributes - nf_tables reject expression netlink attributes * * @NFTA_REJECT_TYPE: packet type to use (NLA_U32: nft_reject_types) |
