Function GetSockOptSocket

pkg/sentry/socket/netstack/netstack.go:995–1179

GetSockOptSocket handles linux getsockopt(2) when level is SOL_SOCKET.

(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, _ linux.SockType, name, outLen int)

// GetSockOptSocket handles linux getsockopt(2) when level is SOL_SOCKET.
func GetSockOptSocket(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, _ linux.SockType, name, outLen int) (marshal.Marshallable, *syserr.Error) {
	// TODO(b/124056281): Stop rejecting short optLen values in getsockopt.
	switch name {
	case linux.SO_ERROR:
		if outLen < sizeOfInt32 {
			return nil, syserr.ErrInvalidArgument
		}

		// Get the last error and convert it.
		err := ep.SocketOptions().GetLastError()
		if err == nil {
			optP := primitive.Int32(0)
			return &optP, nil
		}

		optP := primitive.Int32(syserr.TranslateNetstackError(err).ToLinux())
		return &optP, nil

	case linux.SO_PEERCRED:
		if family != linux.AF_UNIX || outLen < unix.SizeofUcred {
			return nil, syserr.ErrInvalidArgument
		}
		return s.GetPeerCreds(t)

	case linux.SO_PASSCRED:
		if outLen < sizeOfInt32 {
			return nil, syserr.ErrInvalidArgument
		}

		v := primitive.Int32(boolToInt32(ep.SocketOptions().GetPassCred()))
		return &v, nil

	case linux.SO_SNDBUF:
		if outLen < sizeOfInt32 {
			return nil, syserr.ErrInvalidArgument
		}

		size := ep.SocketOptions().GetSendBufferSize()

		if size > math.MaxInt32 {
			size = math.MaxInt32
		}

		sizeP := primitive.Int32(size)
		return &sizeP, nil

	case linux.SO_RCVBUF:
		if outLen < sizeOfInt32 {
			return nil, syserr.ErrInvalidArgument
		}

		size := ep.SocketOptions().GetReceiveBufferSize()

		if size > math.MaxInt32 {
			size = math.MaxInt32
		}

		sizeP := primitive.Int32(size)