[netstack] Move SO_NO_CHECK option to SocketOptions.

PiperOrigin-RevId: 343146856

3 files changed, 17 insertions, 19 deletions

diff --git a/pkg/tcpip/socketops.go b/pkg/tcpip/socketops.go
index e1b0d6354..cc3d59d9d 100644
--- a/pkg/tcpip/socketops.go
+++ b/pkg/tcpip/socketops.go
@@ -32,6 +32,10 @@ type SocketOptions struct {
 	// passCredEnabled determines whether SCM_CREDENTIALS socket control messages
 	// are enabled.
 	passCredEnabled uint32
+
+	// noChecksumEnabled determines whether UDP checksum is disabled while
+	// transmitting for this socket.
+	noChecksumEnabled uint32
 }
 
 func storeAtomicBool(addr *uint32, v bool) {
@@ -61,3 +65,13 @@ func (so *SocketOptions) GetPassCred() bool {
 func (so *SocketOptions) SetPassCred(v bool) {
 	storeAtomicBool(&so.passCredEnabled, v)
 }
+
+// GetNoChecksum gets value for SO_NO_CHECK option.
+func (so *SocketOptions) GetNoChecksum() bool {
+	return atomic.LoadUint32(&so.noChecksumEnabled) != 0
+}
+
+// SetNoChecksum sets value for SO_NO_CHECK option.
+func (so *SocketOptions) SetNoChecksum(v bool) {
+	storeAtomicBool(&so.noChecksumEnabled, v)
+}
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index 648587137..5aa16bf35 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -108,7 +108,6 @@ type endpoint struct {
 	multicastLoop  bool
 	portFlags      ports.Flags
 	bindToDevice   tcpip.NICID
-	noChecksum     bool
 
 	lastErrorMu sync.Mutex   `state:"nosave"`
 	lastError   *tcpip.Error `state:".(string)"`
@@ -550,7 +549,7 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, <-c
 	localPort := e.ID.LocalPort
 	sendTOS := e.sendTOS
 	owner := e.owner
-	noChecksum := e.noChecksum
+	noChecksum := e.SocketOptions().GetNoChecksum()
 	lockReleased = true
 	e.mu.RUnlock()
 
@@ -583,11 +582,6 @@ func (e *endpoint) SetSockOptBool(opt tcpip.SockOptBool, v bool) *tcpip.Error {
 		e.multicastLoop = v
 		e.mu.Unlock()
 
-	case tcpip.NoChecksumOption:
-		e.mu.Lock()
-		e.noChecksum = v
-		e.mu.Unlock()
-
 	case tcpip.ReceiveTOSOption:
 		e.mu.Lock()
 		e.receiveTOS = v
@@ -858,12 +852,6 @@ func (e *endpoint) GetSockOptBool(opt tcpip.SockOptBool) (bool, *tcpip.Error) {
 		e.mu.RUnlock()
 		return v, nil
 
-	case tcpip.NoChecksumOption:
-		e.mu.RLock()
-		v := e.noChecksum
-		e.mu.RUnlock()
-		return v, nil
-
 	case tcpip.ReceiveTOSOption:
 		e.mu.RLock()
 		v := e.receiveTOS
diff --git a/pkg/tcpip/transport/udp/udp_test.go b/pkg/tcpip/transport/udp/udp_test.go
index 492e277a8..1233bab14 100644
--- a/pkg/tcpip/transport/udp/udp_test.go
+++ b/pkg/tcpip/transport/udp/udp_test.go
@@ -1454,16 +1454,12 @@ func TestNoChecksum(t *testing.T) {
 			c.createEndpointForFlow(flow)
 
 			// Disable the checksum generation.
-			if err := c.ep.SetSockOptBool(tcpip.NoChecksumOption, true); err != nil {
-				t.Fatalf("SetSockOptBool failed: %s", err)
-			}
+			c.ep.SocketOptions().SetNoChecksum(true)
 			// This option is effective on IPv4 only.
 			testWrite(c, flow, checker.UDP(checker.NoChecksum(flow.isV4())))
 
 			// Enable the checksum generation.
-			if err := c.ep.SetSockOptBool(tcpip.NoChecksumOption, false); err != nil {
-				t.Fatalf("SetSockOptBool failed: %s", err)
-			}
+			c.ep.SocketOptions().SetNoChecksum(false)
 			testWrite(c, flow, checker.UDP(checker.NoChecksum(false)))
 		})
 	}