/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package freenet.io;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import freenet.io.AddressIdentifier.AddressType;
import freenet.support.Logger;
/** Implementation of allowedHosts */
public class AllowedHosts {
protected final List<AddressMatcher> addressMatchers = new ArrayList<AddressMatcher>();
public AllowedHosts(String allowedHosts) {
setAllowedHosts(allowedHosts);
}
/**
* Sets the list of allowed hosts to <code>allowedHosts</code>. The new
* list is in effect immediately after this method has finished.
*
* @param allowedHosts
* The new list of allowed hosts s
*/
public void setAllowedHosts(String allowedHosts) {
if(allowedHosts == null || allowedHosts.equals("")) allowedHosts = NetworkInterface.DEFAULT_BIND_TO;
StringTokenizer allowedHostsTokens = new StringTokenizer(allowedHosts, ",");
List<AddressMatcher> newAddressMatchers = new ArrayList<AddressMatcher>();
while (allowedHostsTokens.hasMoreTokens()) {
String allowedHost = allowedHostsTokens.nextToken().trim();
String hostname = allowedHost;
if (allowedHost.indexOf('/') != -1) {
hostname = allowedHost.substring(0, allowedHost.indexOf('/'));
}
AddressType addressType = AddressIdentifier.getAddressType(hostname);
if (addressType == AddressType.IPv4) {
newAddressMatchers.add(new Inet4AddressMatcher(allowedHost));
} else if (addressType == AddressType.IPv6) {
newAddressMatchers.add(new Inet6AddressMatcher(allowedHost));
} else if (allowedHost.equals("*")) {
newAddressMatchers.add(new EverythingMatcher());
} else {
Logger.error(NetworkInterface.class, "Ignoring invalid allowedHost: " + allowedHost);
}
}
synchronized (this) {
this.addressMatchers.clear();
this.addressMatchers.addAll(newAddressMatchers);
}
}
public boolean allowed(InetAddress clientAddress) {
AddressType clientAddressType = AddressIdentifier.getAddressType(clientAddress.getHostAddress());
return allowed(clientAddressType, clientAddress);
}
public synchronized boolean allowed(AddressType clientAddressType, InetAddress clientAddress) {
for(AddressMatcher matcher: addressMatchers) {
if(matcher.matches(clientAddress)) return true;
}
return false;
}
public synchronized String getAllowedHosts() {
StringBuilder sb = new StringBuilder();
for(int i=0;i<addressMatchers.size();i++) {
AddressMatcher matcher = addressMatchers.get(i);
if(matcher instanceof EverythingMatcher) return "*";
if(i != 0) sb.append(',');
sb.append(matcher.getHumanRepresentation());
}
return sb.toString();
}
}