Move SO_RCVBUF to socketops.

Fixes #2926, #674

PiperOrigin-RevId: 369457123

1 files changed, 25 insertions, 4 deletions

diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 33a55d89f..0ba71b62e 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -691,10 +691,6 @@ const (
 	// number of unread bytes in the input buffer should be returned.
 	ReceiveQueueSizeOption
 
-	// ReceiveBufferSizeOption is used by SetSockOptInt/GetSockOptInt to
-	// specify the receive buffer size option.
-	ReceiveBufferSizeOption
-
 	// SendQueueSizeOption is used in GetSockOptInt to specify that the
 	// number of unread bytes in the output buffer should be returned.
 	SendQueueSizeOption
@@ -1144,6 +1140,19 @@ type SendBufferSizeOption struct {
 	Max int
 }
 
+// ReceiveBufferSizeOption is used by stack.(Stack*).Option/SetOption to
+// get/set the default, min and max receive buffer sizes.
+type ReceiveBufferSizeOption struct {
+	// Min is the minimum size for send buffer.
+	Min int
+
+	// Default is the default size for send buffer.
+	Default int
+
+	// Max is the maximum size for send buffer.
+	Max int
+}
+
 // GetSendBufferLimits is used to get the send buffer size limits.
 type GetSendBufferLimits func(StackHandler) SendBufferSizeOption
 
@@ -1156,6 +1165,18 @@ func GetStackSendBufferLimits(so StackHandler) SendBufferSizeOption {
 	return ss
 }
 
+// GetReceiveBufferLimits is used to get the send buffer size limits.
+type GetReceiveBufferLimits func(StackHandler) ReceiveBufferSizeOption
+
+// GetStackReceiveBufferLimits is used to get default, min and max send buffer size.
+func GetStackReceiveBufferLimits(so StackHandler) ReceiveBufferSizeOption {
+	var ss ReceiveBufferSizeOption
+	if err := so.Option(&ss); err != nil {
+		panic(fmt.Sprintf("s.Option(%#v) = %s", ss, err))
+	}
+	return ss
+}
+
 // Route is a row in the routing table. It specifies through which NIC (and
 // gateway) sets of packets should be routed. A row is considered viable if the
 // masked target address matches the destination address in the row.