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authorJarno Rajahalme <jrajahalme@nicira.com>2013-10-23 12:44:59 +0400
committerJesse Gross <jesse@nicira.com>2013-11-02 05:43:45 +0400
commit5eb26b156e29eadcc21f73fb5d14497f0db24b86 (patch)
treec038f2ce812b576b011de5e640f6187447149e0e /net/openvswitch/flow.c
parentdf23e9f642830f10c505c8a3d57772ad1238c701 (diff)
downloadlinux-5eb26b156e29eadcc21f73fb5d14497f0db24b86.tar.xz
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>
Diffstat (limited to 'net/openvswitch/flow.c')
-rw-r--r--net/openvswitch/flow.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index b73c7680a3d2..b409f5279601 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -428,6 +428,7 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
struct tcphdr *tcp = tcp_hdr(skb);
key->ipv4.tp.src = tcp->source;
key->ipv4.tp.dst = tcp->dest;
+ key->ipv4.tp.flags = TCP_FLAGS_BE16(tcp);
}
} else if (key->ip.proto == IPPROTO_UDP) {
if (udphdr_ok(skb)) {
@@ -496,6 +497,7 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
struct tcphdr *tcp = tcp_hdr(skb);
key->ipv6.tp.src = tcp->source;
key->ipv6.tp.dst = tcp->dest;
+ key->ipv6.tp.flags = TCP_FLAGS_BE16(tcp);
}
} else if (key->ip.proto == NEXTHDR_UDP) {
if (udphdr_ok(skb)) {