77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.epoll;
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import static java.util.Objects.requireNonNull;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Map;
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import java.util.Map.Entry;
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final class TcpMd5Util {
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static Collection<InetAddress> newTcpMd5Sigs(AbstractEpollChannel channel, Collection<InetAddress> current,
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Map<InetAddress, byte[]> newKeys) throws IOException {
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requireNonNull(channel, "channel");
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requireNonNull(current, "current");
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requireNonNull(newKeys, "newKeys");
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// Validate incoming values
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for (Entry<InetAddress, byte[]> e : newKeys.entrySet()) {
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final byte[] key = e.getValue();
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if (e.getKey() == null) {
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throw new IllegalArgumentException("newKeys contains an entry with null address: " + newKeys);
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}
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requireNonNull(key, "newKeys[" + e.getKey() + "]");
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if (key.length == 0) {
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throw new IllegalArgumentException("newKeys[" + e.getKey() + "] has an empty key.");
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}
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if (key.length > Native.TCP_MD5SIG_MAXKEYLEN) {
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throw new IllegalArgumentException("newKeys[" + e.getKey() +
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"] has a key with invalid length; should not exceed the maximum length (" +
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Native.TCP_MD5SIG_MAXKEYLEN + ')');
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}
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}
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// Remove mappings not present in the new set.
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for (InetAddress addr : current) {
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if (!newKeys.containsKey(addr)) {
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channel.socket.setTcpMd5Sig(addr, null);
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}
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}
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if (newKeys.isEmpty()) {
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return Collections.emptySet();
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}
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// Set new mappings and store addresses which we set.
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final Collection<InetAddress> addresses = new ArrayList<>(newKeys.size());
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for (Entry<InetAddress, byte[]> e : newKeys.entrySet()) {
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channel.socket.setTcpMd5Sig(e.getKey(), e.getValue());
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addresses.add(e.getKey());
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}
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return addresses;
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}
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private TcpMd5Util() {
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}
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}
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