| Methods Summary |
|---|
| public boolean | equals(java.lang.Object obj)Compares this instance with the IP address in the object {@code obj} and
returns {@code true} if they are of the same type and represent the same
IP address, {@code false} otherwise.
return super.equals(obj);
|
| public java.lang.String | getHostAddress()Returns a textual representation of this IP address.
String hostAddress = ""; //$NON-NLS-1$
for (int i = 0; i < 4; i++) {
hostAddress += ipaddress[i] & 255;
if (i != 3) {
hostAddress += "."; //$NON-NLS-1$
}
}
return hostAddress;
|
| public int | hashCode()Gets the hashcode of the represented IP address.
return InetAddress.bytesToInt(ipaddress, 0);
|
| public boolean | isAnyLocalAddress()Returns whether the represented address is the local wildcard ANY address
or not.
for (int i = 0; i < ipaddress.length; i++) {
if (ipaddress[i] != 0) {
return false;
}
}
return true;
|
| public boolean | isLinkLocalAddress()Returns whether this address has a link-local scope or not.
RFC 3484
Default Address Selection for Internet Protocol Version 6 (IPv6) states
IPv4 auto-configuration addresses, prefix 169.254/16, IPv4 loopback
addresses, prefix 127/8, are assigned link-local scope.
// The reference implementation does not return true for loopback
// addresses even though RFC 3484 says to do so
return (((ipaddress[0] & 255) == 169) && ((ipaddress[1] & 255) == 254));
|
| public boolean | isLoopbackAddress()Returns whether the represented address is a loopback address or not.
Loopback IPv4 addresses are prefixed with: 011111111 = 127.
return (ipaddress[0] & 255) == 127;
|
| public boolean | isMCGlobal()Returns whether the address is a global multicast address or not. Valid
MCGlobal IPv4 addresses are 224.0.1.0 - 238.255.255.255.
// Check if we have a prefix of 1110
if (!isMulticastAddress()) {
return false;
}
int address = InetAddress.bytesToInt(ipaddress, 0);
/*
* Now check the boundaries of the global space if we have an address
* that is prefixed by something less than 111000000000000000000001
* (fortunately we don't have to worry about sign after shifting 8 bits
* right) it is not multicast. ( < 224.0.1.0)
*/
if (address >>> 8 < 0xE00001) {
return false;
}
/*
* Now check the high boundary which is prefixed by 11101110 = 0xEE. If
* the value is higher than this than it is not MCGlobal ( >
* 238.255.255.255 )
*/
if (address >>> 24 > 0xEE) {
return false;
}
return true;
|
| public boolean | isMCLinkLocal()Returns whether the address is a link-local multicast address or not. The
valid range for IPv4 link-local addresses is: 224.0.0.0 to 239.0.0.255
Hence a mask of 111000000000000000000000 = 0xE00000.
return InetAddress.bytesToInt(ipaddress, 0) >>> 8 == 0xE00000;
|
| public boolean | isMCNodeLocal()Returns whether the address has a node-local scope or not. This method
returns always {@code false} because there are no valid IPv4 node-local
addresses.
return false;
|
| public boolean | isMCOrgLocal()Returns whether the address is a organization-local multicast address or
not. The valid range for IPv4 organization-local addresses is:
239.192.0.0 to 239.195.255.255 Hence masks of 11101111 11000000 to
11101111 11000011 are valid. 0xEFC0 to 0xEFC3
int prefix = InetAddress.bytesToInt(ipaddress, 0) >>> 16;
return prefix >= 0xEFC0 && prefix <= 0xEFC3;
|
| public boolean | isMCSiteLocal()Returns whether the address is a site-local multicast address or not. The
valid range for IPv4 site-local addresses is: 239.255.0.0 to
239.255.255.255 Hence a mask of 11101111 11111111 = 0xEFFF.
return (InetAddress.bytesToInt(ipaddress, 0) >>> 16) == 0xEFFF;
|
| public boolean | isMulticastAddress()Returns whether the represented address is a multicast address or not.
Valid IPv4 multicast addresses are prefixed with 1110 = 0xE.
return (ipaddress[0] & 0xF0) == 0xE0;
|
| public boolean | isSiteLocalAddress()Returns whether this address has a site-local scope or not.
RFC 3484
Default Address Selection for Internet Protocol Version 6 (IPv6) states
IPv4 private addresses, prefixes 10/8, 172.16/12, and 192.168/16, are
assigned site-local scope.
return ((ipaddress[0] & 255) == 10) || ((ipaddress[0] & 255) == 172)
&& (((ipaddress[1] & 255) > 15) && (ipaddress[1] & 255) < 32)
|| ((ipaddress[0] & 255) == 192)
&& ((ipaddress[1] & 255) == 168);
|
| private java.lang.Object | writeReplace()
return new InetAddress(ipaddress, hostName);
|
