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TcpMd5Util.java
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/
TcpMd5Util.java
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/*
* Copyright 2015 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.channel.epoll;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static io.netty.util.internal.ObjectUtil.checkNotNullWithIAE;
import static io.netty.util.internal.ObjectUtil.checkNonEmpty;
import java.io.IOException;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Map.Entry;
final class TcpMd5Util {
static Collection<InetAddress> newTcpMd5Sigs(AbstractEpollChannel channel, Collection<InetAddress> current,
Map<InetAddress, byte[]> newKeys) throws IOException {
checkNotNull(channel, "channel");
checkNotNull(current, "current");
checkNotNull(newKeys, "newKeys");
// Validate incoming values
for (Entry<InetAddress, byte[]> e : newKeys.entrySet()) {
final byte[] key = e.getValue();
checkNotNullWithIAE(e.getKey(), "e.getKey");
checkNonEmpty(key, e.getKey().toString());
if (key.length > Native.TCP_MD5SIG_MAXKEYLEN) {
throw new IllegalArgumentException("newKeys[" + e.getKey() +
"] has a key with invalid length; should not exceed the maximum length (" +
Native.TCP_MD5SIG_MAXKEYLEN + ')');
}
}
// Remove mappings not present in the new set.
for (InetAddress addr : current) {
if (!newKeys.containsKey(addr)) {
channel.socket.setTcpMd5Sig(addr, null);
}
}
if (newKeys.isEmpty()) {
return Collections.emptySet();
}
// Set new mappings and store addresses which we set.
final Collection<InetAddress> addresses = new ArrayList<InetAddress>(newKeys.size());
for (Entry<InetAddress, byte[]> e : newKeys.entrySet()) {
channel.socket.setTcpMd5Sig(e.getKey(), e.getValue());
addresses.add(e.getKey());
}
return addresses;
}
private TcpMd5Util() {
}
}