content: /*
   * LibertyBans
   * Copyright © 2021 Anand Beh
   *
   * LibertyBans is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   *
   * LibertyBans is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with LibertyBans. If not, see <https://www.gnu.org/licenses/>
   * and navigate to version 3 of the GNU Affero General Public License.
   */
  
  package space.arim.libertybans.core.commands.extra;
  
  import space.arim.libertybans.api.NetworkAddress;
  
  final class AddressParser {
  
  	private AddressParser() { }
  
  	static NetworkAddress parseIpv4(String targetArg) {
  		String[] octetStrings = targetArg.split("\\.");
  		if (octetStrings.length != 4) {
  			return null;
  		}
  		byte[] ipv4 = new byte[4];
  		for (int n = 0; n < 4; n++) {
  			String octetString = octetStrings[n];
  			int octet;
  			try {
  				octet = Integer.parseUnsignedInt(octetString);
  			} catch (NumberFormatException ex) {
  				return null;
  			}
  			if (octet < 0 || octet > 255) {
  				return null;
  			}
  			ipv4[n] = (byte) octet;
  		}
  		return NetworkAddress.of(ipv4);
  	}
  }
  