net/tcp/setockopt: impelment setsockopt(fd, SOL_TCP, TCP_INQ)

PiperOrigin-RevId: 258859507

1 files changed, 16 insertions, 12 deletions

diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index cb0ea83a6..70f4a2b8c 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -189,7 +189,6 @@ func (e *endpoint) Read(addr *tcpip.FullAddress) (buffer.View, tcpip.ControlMess
 	p := e.rcvList.Front()
 	e.rcvList.Remove(p)
 	e.rcvBufSize -= p.data.Size()
-
 	e.rcvMu.Unlock()
 
 	if addr != nil {
@@ -539,6 +538,22 @@ func (e *endpoint) SetSockOpt(opt interface{}) *tcpip.Error {
 	return nil
 }
 
+// GetSockOptInt implements tcpip.Endpoint.GetSockOptInt.
+func (e *endpoint) GetSockOptInt(opt tcpip.SockOpt) (int, *tcpip.Error) {
+	switch opt {
+	case tcpip.ReceiveQueueSizeOption:
+		v := 0
+		e.rcvMu.Lock()
+		if !e.rcvList.Empty() {
+			p := e.rcvList.Front()
+			v = p.data.Size()
+		}
+		e.rcvMu.Unlock()
+		return v, nil
+	}
+	return -1, tcpip.ErrUnknownProtocolOption
+}
+
 // GetSockOpt implements tcpip.Endpoint.GetSockOpt.
 func (e *endpoint) GetSockOpt(opt interface{}) *tcpip.Error {
 	switch o := opt.(type) {
@@ -573,17 +588,6 @@ func (e *endpoint) GetSockOpt(opt interface{}) *tcpip.Error {
 		}
 		return nil
 
-	case *tcpip.ReceiveQueueSizeOption:
-		e.rcvMu.Lock()
-		if e.rcvList.Empty() {
-			*o = 0
-		} else {
-			p := e.rcvList.Front()
-			*o = tcpip.ReceiveQueueSizeOption(p.data.Size())
-		}
-		e.rcvMu.Unlock()
-		return nil
-
 	case *tcpip.MulticastTTLOption:
 		e.mu.Lock()
 		*o = tcpip.MulticastTTLOption(e.multicastTTL)