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// Licensed to the Software Freedom Conservancy (SFC) under one
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// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
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package org.openqa.selenium.net;

/**
 * Identifies the ephemeral port range for a given environment.
 *
 * When trying to locate a "random" free port, it is important to not allocate within the
 * ephemeral range, since these can be allocated at any time, and the probability of race conditions
 * increases as the number of recently used ports increases, something which is quite common when
 * running the webdriver tests.
 */
public interface EphemeralPortRangeDetector {

  /**
   * Returns the first port in the ephemeral range
   *
   * @return The first ephemeral port
   */
  int getLowestEphemeralPort();

  /**
   * Returns the last port that could be searched for free ports
   *
   * @return The first port that may be free
   */
  int getHighestEphemeralPort();
}