/**
* Gets the next available address in this address pool.
*
* @return the next available address
*/
public InetAddress getNextAvailableAddress() {
if (freeList != null) {
BigInteger next = freeList.getNextFree();
if (next != null) {
try {
InetAddress ip = InetAddress.getByAddress(next.toByteArray());
int pingCheckTimeout =
DhcpServerPolicies.globalPolicyAsInt(Property.V4_PINGCHECK_TIMEOUT);
if (pingCheckTimeout > 0) {
try {
if (ip.isReachable(pingCheckTimeout)) {
log.warn("Next free address answered ping check: " + ip.getHostAddress());
setUsed(ip);
return getNextAvailableAddress(); // try again
}
} catch (IOException ex) {
log.error("Failed to perform v4 ping check: " + ex);
}
}
return ip;
} catch (UnknownHostException ex) {
log.error("Unable to build IPv4 address from next free: " + ex);
}
}
}
return null;
}
@Override
public InetAddress getNextAvailableAddress() {
InetAddress result = null;
if (freeList != null) {
BigInteger start = new BigInteger(subnet.getSubnetAddress().getAddress());
BigInteger next = freeList.getNextFree();
if (next != null) {
// TODO: if there are no more free addresses, then find one
// that has been released or has been expired
try {
BigInteger prefix = next.multiply(calculatePrefix());
result = InetAddress.getByAddress(start.add(prefix).toByteArray());
} catch (Exception ex) {
log.error("Unable to build IPv6 prefix from next free: " + ex);
}
}
}
return result;
}
