org.treeleafj.xmax.http.basic.InetAddressUtils Maven / Gradle / Ivy
package org.treeleafj.xmax.http.basic;
import java.util.regex.Pattern;
/**
* Created by leaf on 2016/3/18.
*/
public abstract class InetAddressUtils {
private static final String IPV4_BASIC_PATTERN_STRING =
"(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}" + // initial 3 fields, 0-255 followed by .
"([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"; // final field, 0-255
private static final Pattern IPV4_PATTERN =
Pattern.compile("^" + IPV4_BASIC_PATTERN_STRING + "$");
private static final Pattern IPV4_MAPPED_IPV6_PATTERN =
Pattern.compile("^::[fF]{4}:" + IPV4_BASIC_PATTERN_STRING + "$");
private static final Pattern IPV6_STD_PATTERN =
Pattern.compile(
"^[0-9a-fA-F]{1,4}(:[0-9a-fA-F]{1,4}){7}$");
private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
Pattern.compile(
"^(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)" + // 0-6 hex fields
"::" +
"(([0-9A-Fa-f]{1,4}(:[0-9A-Fa-f]{1,4}){0,5})?)$"); // 0-6 hex fields
/*
* The above pattern is not totally rigorous as it allows for more than 7 hex fields in total
*/
private static final char COLON_CHAR = ':';
// Must not have more than 7 colons (i.e. 8 fields)
private static final int MAX_COLON_COUNT = 7;
/**
* Checks whether the parameter is a valid IPv4 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid IPv4 address
*/
public static boolean isIPv4Address(final String input) {
return IPV4_PATTERN.matcher(input).matches();
}
public static boolean isIPv4MappedIPv64Address(final String input) {
return IPV4_MAPPED_IPV6_PATTERN.matcher(input).matches();
}
/**
* Checks whether the parameter is a valid standard (non-compressed) IPv6 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid standard (non-compressed) IPv6 address
*/
public static boolean isIPv6StdAddress(final String input) {
return IPV6_STD_PATTERN.matcher(input).matches();
}
/**
* Checks whether the parameter is a valid compressed IPv6 address
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid compressed IPv6 address
*/
public static boolean isIPv6HexCompressedAddress(final String input) {
int colonCount = 0;
for (int i = 0; i < input.length(); i++) {
if (input.charAt(i) == COLON_CHAR) {
colonCount++;
}
}
return colonCount <= MAX_COLON_COUNT && IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
}
/**
* Checks whether the parameter is a valid IPv6 address (including compressed).
*
* @param input the address string to check for validity
* @return true if the input parameter is a valid standard or compressed IPv6 address
*/
public static boolean isIPv6Address(final String input) {
return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
}
}