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[94.21.174.118]) by smtp.gmail.com with ESMTPSA id f2sm2489756wrj.54.2020.08.29.00.04.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 29 Aug 2020 00:04:16 -0700 (PDT) From: Balazs Scheidler To: netfilter-devel@vger.kernel.org Cc: Balazs Scheidler Subject: [PATCH nftables v2 3/5] doc: added documentation on "socket wildcard" Date: Sat, 29 Aug 2020 09:04:03 +0200 Message-Id: <20200829070405.23636-4-bazsi77@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200829070405.23636-1-bazsi77@gmail.com> References: <20200829070405.23636-1-bazsi77@gmail.com> Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Signed-off-by: Balazs Scheidler --- doc/primary-expression.txt | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/doc/primary-expression.txt b/doc/primary-expression.txt index a9c39cbb..e87e8cc2 100644 --- a/doc/primary-expression.txt +++ b/doc/primary-expression.txt @@ -195,7 +195,7 @@ raw prerouting meta ipsec exists accept SOCKET EXPRESSION ~~~~~~~~~~~~~~~~~ [verse] -*socket* {*transparent* | *mark*} +*socket* {*transparent* | *mark* | *wildcard*} Socket expression can be used to search for an existing open TCP/UDP socket and its attributes that can be associated with a packet. It looks for an established @@ -209,15 +209,20 @@ or non-zero bound listening socket (possibly with a non-local address). Value of the IP_TRANSPARENT socket option in the found socket. It can be 0 or 1.| boolean (1 bit) |mark| Value of the socket mark (SOL_SOCKET, SO_MARK). | mark +|wildcard| +Indicates whether the socket is wildcard-bound (e.g. 0.0.0.0 or ::0). | +boolean (1 bit) |================== .Using socket expression ------------------------ -# Mark packets that correspond to a transparent socket +# Mark packets that correspond to a transparent socket. "socket wildcard 0" +# means that zero-bound listener sockets are NOT matched (which is usually +# exactly what you want). table inet x { chain y { type filter hook prerouting priority -150; policy accept; - socket transparent 1 mark set 0x00000001 accept + socket transparent 1 socket wildcard 0 mark set 0x00000001 accept } } -- 2.17.1