Move SO_ERROR and SO_OOBINLINE option to socketops.

SO_OOBINLINE option is set/get as boolean value, which is the same as linux.
As we currently do not support disabling this option, we always return it as
true.

PiperOrigin-RevId: 347413905

3 files changed, 22 insertions, 15 deletions

diff --git a/pkg/tcpip/socketops.go b/pkg/tcpip/socketops.go
index b14df9e09..3d29b31ee 100644
--- a/pkg/tcpip/socketops.go
+++ b/pkg/tcpip/socketops.go
@@ -37,6 +37,9 @@ type SocketOptionsHandler interface {
 
 	// OnCorkOptionSet is invoked when TCP_CORK is set for an endpoint.
 	OnCorkOptionSet(v bool)
+
+	// LastError is invoked when SO_ERROR is read for an endpoint.
+	LastError() *Error
 }
 
 // DefaultSocketOptionsHandler is an embeddable type that implements no-op
@@ -60,6 +63,11 @@ func (*DefaultSocketOptionsHandler) OnDelayOptionSet(bool) {}
 // OnCorkOptionSet implements SocketOptionsHandler.OnCorkOptionSet.
 func (*DefaultSocketOptionsHandler) OnCorkOptionSet(bool) {}
 
+// LastError implements SocketOptionsHandler.LastError.
+func (*DefaultSocketOptionsHandler) LastError() *Error {
+	return nil
+}
+
 // SocketOptions contains all the variables which store values for SOL_SOCKET,
 // SOL_IP, SOL_IPV6 and SOL_TCP level options.
 //
@@ -316,3 +324,17 @@ func (so *SocketOptions) GetReceiveOriginalDstAddress() bool {
 func (so *SocketOptions) SetReceiveOriginalDstAddress(v bool) {
 	storeAtomicBool(&so.receiveOriginalDstAddress, v)
 }
+
+// GetLastError gets value for SO_ERROR option.
+func (so *SocketOptions) GetLastError() *Error {
+	return so.handler.LastError()
+}
+
+// GetOutOfBandInline gets value for SO_OOBINLINE option.
+func (*SocketOptions) GetOutOfBandInline() bool {
+	return true
+}
+
+// SetOutOfBandInline sets value for SO_OOBINLINE option. We currently do not
+// support disabling this option.
+func (*SocketOptions) SetOutOfBandInline(bool) {}
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index c19769ed8..24f20203b 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -1096,14 +1096,6 @@ type RemoveMembershipOption MembershipOption
 
 func (*RemoveMembershipOption) isSettableSocketOption() {}
 
-// OutOfBandInlineOption is used by SetSockOpt/GetSockOpt to specify whether
-// TCP out-of-band data is delivered along with the normal in-band data.
-type OutOfBandInlineOption int
-
-func (*OutOfBandInlineOption) isGettableSocketOption() {}
-
-func (*OutOfBandInlineOption) isSettableSocketOption() {}
-
 // SocketDetachFilterOption is used by SetSockOpt to detach a previously attached
 // classic BPF filter on a given endpoint.
 type SocketDetachFilterOption int
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go
index 3e116e829..69512ebef 100644
--- a/pkg/tcpip/transport/tcp/endpoint.go
+++ b/pkg/tcpip/transport/tcp/endpoint.go
@@ -1838,9 +1838,6 @@ func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) *tcpip.Error {
 		e.keepalive.Unlock()
 		e.notifyProtocolGoroutine(notifyKeepaliveChanged)
 
-	case *tcpip.OutOfBandInlineOption:
-		// We don't currently support disabling this option.
-
 	case *tcpip.TCPUserTimeoutOption:
 		e.LockUser()
 		e.userTimeout = time.Duration(*v)
@@ -2046,10 +2043,6 @@ func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) *tcpip.Error {
 		*o = tcpip.TCPUserTimeoutOption(e.userTimeout)
 		e.UnlockUser()
 
-	case *tcpip.OutOfBandInlineOption:
-		// We don't currently support disabling this option.
-		*o = 1
-
 	case *tcpip.CongestionControlOption:
 		e.LockUser()
 		*o = e.cc