From 5eb26b156e29eadcc21f73fb5d14497f0db24b86 Mon Sep 17 00:00:00 2001 From: Jarno Rajahalme Date: Wed, 23 Oct 2013 01:44:59 -0700 Subject: openvswitch: TCP flags matching support. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit tcp_flags=flags/mask Bitwise match on TCP flags. The flags and mask are 16-bit num‐ bers written in decimal or in hexadecimal prefixed by 0x. Each 1-bit in mask requires that the corresponding bit in port must match. Each 0-bit in mask causes the corresponding bit to be ignored. TCP protocol currently defines 9 flag bits, and additional 3 bits are reserved (must be transmitted as zero), see RFCs 793, 3168, and 3540. The flag bits are, numbering from the least significant bit: 0: FIN No more data from sender. 1: SYN Synchronize sequence numbers. 2: RST Reset the connection. 3: PSH Push function. 4: ACK Acknowledgement field significant. 5: URG Urgent pointer field significant. 6: ECE ECN Echo. 7: CWR Congestion Windows Reduced. 8: NS Nonce Sum. 9-11: Reserved. 12-15: Not matchable, must be zero. Signed-off-by: Jarno Rajahalme Signed-off-by: Jesse Gross --- net/openvswitch/flow.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/openvswitch/flow.h') diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index 204e0ccd116d..1510f51dbf74 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -93,6 +93,7 @@ struct sw_flow_key { struct { __be16 src; /* TCP/UDP/SCTP source port. */ __be16 dst; /* TCP/UDP/SCTP destination port. */ + __be16 flags; /* TCP flags. */ } tp; struct { u8 sha[ETH_ALEN]; /* ARP source hardware address. */ @@ -109,6 +110,7 @@ struct sw_flow_key { struct { __be16 src; /* TCP/UDP/SCTP source port. */ __be16 dst; /* TCP/UDP/SCTP destination port. */ + __be16 flags; /* TCP flags. */ } tp; struct { struct in6_addr target; /* ND target address. */ -- cgit v1.2.3