From c006b9b1c813089f22ae979fb3198227be25c20a Mon Sep 17 00:00:00 2001
From: Tamir Duberstein <tamird@google.com>
Date: Wed, 26 May 2021 12:16:36 -0700
Subject: Move presence methods from segment to TCPFlags

PiperOrigin-RevId: 376001032
---
 pkg/tcpip/header/tcp.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'pkg/tcpip/header')

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")
-- 
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