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/**
* The MIT License (MIT)
*
* Copyright (c) 2011-2014, Yannis Gonianakis
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.ripe.commons.ip;
import static net.ripe.commons.ip.RangeUtils.checkRange;
import java.math.BigInteger;
public final class Ipv4 extends AbstractIp {
private static final long serialVersionUID = -1L;
public static final int BYTE_MASK = 0xff;
public static final int NUMBER_OF_BITS = 32;
public static final long MINIMUM_VALUE = 0;
public static final long MAXIMUM_VALUE = (1L << NUMBER_OF_BITS) - 1;
public static final Ipv4 FIRST_IPV4_ADDRESS = Ipv4.of(MINIMUM_VALUE);
public static final Ipv4 LAST_IPV4_ADDRESS = Ipv4.of(MAXIMUM_VALUE);
private static final int TOTAL_OCTETS = 4;
private static final int MAX_OCTET_VALUE = 255;
private static final int MIN_OCTET_VALUE = 0;
private static final int THREE_OCTETS = 24;
private static final int TWO_OCTETS = 16;
private static final int ONE_OCTET = 8;
private static final String DEFAULT_PARSING_ERROR_MESSAGE = "Invalid IPv4 address: ";
private final Long value;
protected Ipv4(Long value) {
this.value = Validate.notNull(value, "value is required");
Validate.isTrue(value.compareTo(MINIMUM_VALUE) >= 0, "Value of IPv4 has to be greater than or equal to " + MINIMUM_VALUE);
Validate.isTrue(value.compareTo(MAXIMUM_VALUE) <= 0, "Value of IPv4 has to be less than or equal to " + MAXIMUM_VALUE);
}
long value() {
return value;
}
public static Ipv4 of(BigInteger from) {
if(from == null) {
throw new IllegalArgumentException("from cannot be null");
}
return new Ipv4(from.longValue());
}
public static Ipv4 of(Long value) {
return new Ipv4(value);
}
public static Ipv4 of(String value) {
return parse(value);
}
public static Ipv4 parse(String ipv4Address) {
String ipv4String = Validate.notNull(ipv4Address, DEFAULT_PARSING_ERROR_MESSAGE + ipv4Address).trim();
Validate.isTrue(!ipv4String.isEmpty()
&& Character.isDigit(ipv4String.charAt(0))
&& Character.isDigit(ipv4String.charAt(ipv4String.length() - 1)), DEFAULT_PARSING_ERROR_MESSAGE + ipv4Address);
long value = 0;
int octet = 0;
int octetCount = 1;
for (int i = 0; i < ipv4String.length(); ++i) {
char ch = ipv4String.charAt(i);
if (Character.isDigit(ch)) {
octet = octet * 10 + (ch - '0');
} else if (ch == '.') {
Validate.isTrue(octetCount < TOTAL_OCTETS, DEFAULT_PARSING_ERROR_MESSAGE + ipv4String);
octetCount++;
value = addOctet(value, octet);
octet = 0;
} else {
throw new IllegalArgumentException(DEFAULT_PARSING_ERROR_MESSAGE + ipv4String);
}
}
Validate.isTrue(octetCount == TOTAL_OCTETS, DEFAULT_PARSING_ERROR_MESSAGE + ipv4String);
return new Ipv4(addOctet(value, octet));
}
private static long addOctet(long value, int octet) {
RangeUtils.checkRange(octet, MIN_OCTET_VALUE, MAX_OCTET_VALUE);
return ((value) << 8) | octet;
}
@Override
public int compareTo(Ipv4 other) {
return value.compareTo(other.value);
}
@Override
public String toString() {
int a = (int) (value >> THREE_OCTETS);
int b = (int) (value >> TWO_OCTETS) & BYTE_MASK;
int c = (int) (value >> ONE_OCTET) & BYTE_MASK;
int d = (int) (value & BYTE_MASK);
return a + "." + b + "." + c + "." + d;
}
/*@Override
public boolean isValidNetmask() {
int leadingOnesCount = Integer.numberOfLeadingZeros(~(int) value);
int trailingZeroesCount = Integer.numberOfTrailingZeros((int) value);
return leadingOnesCount > 0 && (leadingOnesCount + trailingZeroesCount) == IPv4_NUMBER_OF_BITS;
}*/
@Override
public Ipv4 next() {
return new Ipv4(value + 1);
}
@Override
public Ipv4 previous() {
return new Ipv4(value - 1);
}
@Override
public boolean hasNext() {
return this.compareTo(LAST_IPV4_ADDRESS) < 0;
}
@Override
public boolean hasPrevious() {
return this.compareTo(FIRST_IPV4_ADDRESS) > 0;
}
@Override
public Ipv4Range asRange() {
return new Ipv4Range(this, this);
}
@Override
public int bitSize() {
return NUMBER_OF_BITS;
}
@Override
public BigInteger asBigInteger() {
return BigInteger.valueOf(value);
}
@Override
public Ipv4 lowerBoundForPrefix(int prefixLength) {
checkRange(prefixLength, 0, NUMBER_OF_BITS);
long mask = ~((1L << (NUMBER_OF_BITS - prefixLength)) - 1);
return new Ipv4(value & mask);
}
@Override
public Ipv4 upperBoundForPrefix(int prefixLength) {
checkRange(prefixLength, 0, NUMBER_OF_BITS);
long mask = (1L << (NUMBER_OF_BITS - prefixLength)) - 1;
return new Ipv4(value | mask);
}
@Override
public int getCommonPrefixLength(Ipv4 other) {
long temp = value ^ other.value;
return Integer.numberOfLeadingZeros((int) temp);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Ipv4 that = (Ipv4) o;
return value.equals(that.value);
}
@Override
public int hashCode() {
return value.hashCode();
}
}
