Move presence methods from segment to TCPFlags

PiperOrigin-RevId: 376001032

1 files changed, 10 insertions, 0 deletions

diff --git a/pkg/tcpip/header/tcp.go b/pkg/tcpip/header/tcp.go
index 0df517000..8dabe3354 100644
--- a/pkg/tcpip/header/tcp.go
+++ b/pkg/tcpip/header/tcp.go
@@ -48,6 +48,16 @@ const (
 // TCPFlags is the dedicated type for TCP flags.
 type TCPFlags uint8
 
+// Intersects returns true iff there are flags common to both f and o.
+func (f TCPFlags) Intersects(o TCPFlags) bool {
+	return f&o != 0
+}
+
+// Contains returns true iff all the flags in o are contained within f.
+func (f TCPFlags) Contains(o TCPFlags) bool {
+	return f&o == o
+}
+
 // String implements Stringer.String.
 func (f TCPFlags) String() string {
 	flagsStr := []byte("FSRPAU")