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authorJarno Rajahalme <jrajahalme@nicira.com>2013-10-23 01:44:59 -0700
committerJesse Gross <jesse@nicira.com>2013-11-01 18:43:45 -0700
commit5eb26b156e29eadcc21f73fb5d14497f0db24b86 (patch)
treec038f2ce812b576b011de5e640f6187447149e0e /kernel
parentdf23e9f642830f10c505c8a3d57772ad1238c701 (diff)
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openvswitch: TCP flags matching support.
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 <jrajahalme@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
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