diff options
author | Máté Eckl <ecklm94@gmail.com> | 2018-07-20 09:40:09 +0200 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-08-03 12:17:31 +0200 |
commit | 2be1d52644cf77bb2634fb504a265da480c5e901 (patch) | |
tree | 3ab676648f1b5c51583113ecca27b450e10bb210 /include/statement.h | |
parent | 42ea301c7f3d1d55802fa2d675cdc653a72bd8c5 (diff) |
src: Add tproxy support
This patch adds support for transparent proxy functionality which is
supported in ip, ip6 and inet tables.
The syntax is the following:
tproxy [{|ip|ip6}] to {<ip address>|:<port>|<ip address>:<port>}
It looks for a socket listening on the specified address or port and
assigns it to the matching packet.
In an inet table, a packet matches for both families until address is
specified.
Network protocol family has to be specified **only** in inet tables if
address is specified.
As transparent proxy support is implemented for sockets with layer 4
information, a transport protocol header criterion has to be set in the
same rule. eg. 'meta l4proto tcp' or 'udp dport 4444'
Example ruleset:
table ip x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport ntp tproxy to 1.1.1.1
udp dport ssh tproxy to :2222
}
}
table ip6 x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport ntp tproxy to [dead::beef]
udp dport ssh tproxy to :2222
}
}
table inet x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport 321 tproxy to :ssh
tcp dport 99 tproxy ip to 1.1.1.1:999
udp dport 155 tproxy ip6 to [dead::beef]:smux
}
}
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/statement.h')
-rw-r--r-- | include/statement.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/statement.h b/include/statement.h index 5a907aa4..7840e9d2 100644 --- a/include/statement.h +++ b/include/statement.h @@ -128,6 +128,15 @@ struct nat_stmt { extern struct stmt *nat_stmt_alloc(const struct location *loc, enum nft_nat_etypes type); +struct tproxy_stmt { + struct expr *addr; + struct expr *port; + uint8_t family; + uint8_t table_family; /* only used for printing the rule */ +}; + +extern struct stmt *tproxy_stmt_alloc(const struct location *loc); + struct queue_stmt { struct expr *queue; uint16_t flags; @@ -271,6 +280,7 @@ enum stmt_types { STMT_LOG, STMT_REJECT, STMT_NAT, + STMT_TPROXY, STMT_QUEUE, STMT_CT, STMT_SET, @@ -337,6 +347,7 @@ struct stmt { struct limit_stmt limit; struct reject_stmt reject; struct nat_stmt nat; + struct tproxy_stmt tproxy; struct queue_stmt queue; struct quota_stmt quota; struct ct_stmt ct; |