diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/HostInfo.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/HostInfo.java | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/HostInfo.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/HostInfo.java new file mode 100644 index 00000000..5cd433ca --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/HostInfo.java @@ -0,0 +1,256 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF 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 + * + * http://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 org.apache.tools.ant.taskdefs; + +import java.net.Inet4Address; +import java.net.Inet6Address; +import java.net.InetAddress; +import java.net.NetworkInterface; +import java.util.Arrays; +import java.util.Enumeration; +import java.util.LinkedList; +import java.util.List; + +import org.apache.tools.ant.BuildException; +import org.apache.tools.ant.Project; +import org.apache.tools.ant.Task; + +/** + * Sets properties to the host provided, or localhost if no information is + * provided. The default properties are NAME, FQDN, ADDR4, ADDR6; + * + * @since Ant 1.8 + * @ant.task category="utility" + */ + + +public class HostInfo extends Task { + private static final String DEF_REM_ADDR6 = "::"; + + private static final String DEF_REM_ADDR4 = "0.0.0.0"; + + private static final String DEF_LOCAL_ADDR6 = "::1"; + + private static final String DEF_LOCAL_ADDR4 = "127.0.0.1"; + + private static final String DEF_LOCAL_NAME = "localhost"; + private static final String DEF_DOMAIN = "localdomain"; + + private static final String DOMAIN = "DOMAIN"; + + private static final String NAME = "NAME"; + + private static final String ADDR4 = "ADDR4"; + + private static final String ADDR6 = "ADDR6"; + + private String prefix = ""; + + private String host; + + private InetAddress nameAddr; + + private InetAddress best6; + + private InetAddress best4; + + private List<InetAddress> inetAddrs; + + /** + * Set a prefix for the properties. If the prefix does not end with a "." + * one is automatically added. + * + * @param aPrefix + * the prefix to use. + * @since Ant 1.8 + */ + public void setPrefix(String aPrefix) { + prefix = aPrefix; + if (!prefix.endsWith(".")) { + prefix += "."; + } + } + + /** + * Set the host to be retrieved. + * + * @param aHost + * the name or the address of the host, data for the local host + * will be retrieved if omitted. + * @since Ant 1.8 + */ + public void setHost(String aHost) { + host = aHost; + } + + /** + * set the properties. + * + * @throws BuildException + * on error. + */ + public void execute() throws BuildException { + if (host == null || "".equals(host)) { + executeLocal(); + } else { + executeRemote(); + } + } + + private void executeLocal() { + try { + inetAddrs = new LinkedList<InetAddress>(); + Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); + while (interfaces.hasMoreElements()) { + NetworkInterface currentif = interfaces.nextElement(); + Enumeration<InetAddress> addrs = currentif.getInetAddresses(); + while (addrs.hasMoreElements()) { + inetAddrs.add(addrs.nextElement()); + } + } + selectAddresses(); + + if (nameAddr != null && hasHostName(nameAddr)) { + setDomainAndName(nameAddr.getCanonicalHostName()); + } else { + setProperty(DOMAIN, DEF_DOMAIN); + setProperty(NAME, DEF_LOCAL_NAME); + } + if (best4 != null) { + setProperty(ADDR4, best4.getHostAddress()); + } else { + setProperty(ADDR4, DEF_LOCAL_ADDR4); + } + if (best6 != null) { + setProperty(ADDR6, best6.getHostAddress()); + } else { + setProperty(ADDR6, DEF_LOCAL_ADDR6); + } + } catch (Exception e) { + log("Error retrieving local host information", e, Project.MSG_WARN); + setProperty(DOMAIN, DEF_DOMAIN); + setProperty(NAME, DEF_LOCAL_NAME); + setProperty(ADDR4, DEF_LOCAL_ADDR4); + setProperty(ADDR6, DEF_LOCAL_ADDR6); + } + } + + private boolean hasHostName(InetAddress addr) { + return !addr.getHostAddress().equals(addr.getCanonicalHostName()); + } + + private void selectAddresses() { + for (InetAddress current : inetAddrs) { + if (!current.isMulticastAddress()) { + if (current instanceof Inet4Address) { + best4 = selectBestAddress(best4, current); + } else if (current instanceof Inet6Address) { + best6 = selectBestAddress(best6, current); + } + } + } + + nameAddr = selectBestAddress(best4, best6); + } + + private InetAddress selectBestAddress(InetAddress bestSoFar, + InetAddress current) { + InetAddress best = bestSoFar; + if (best == null) { + // none selected so far, so this one is better. + best = current; + } else { + if (current == null || current.isLoopbackAddress()) { + // definitely not better than the previously selected address. + } else if (current.isLinkLocalAddress()) { + // link local considered better than loopback + if (best.isLoopbackAddress()) { + best = current; + } + } else if (current.isSiteLocalAddress()) { + // site local considered better than link local (and loopback) + // address with hostname resolved considered better than + // address without hostname + if (best.isLoopbackAddress() + || best.isLinkLocalAddress() + || (best.isSiteLocalAddress() && !hasHostName(best))) { + best = current; + } + } else { + // current is a "Global address", considered better than + // site local (and better than link local, loopback) + // address with hostname resolved considered better than + // address without hostname + if (best.isLoopbackAddress() + || best.isLinkLocalAddress() + || best.isSiteLocalAddress() + || !hasHostName(best)) { + best = current; + } + } + } + return best; + } + + private void executeRemote() { + try { + inetAddrs = Arrays.asList(InetAddress.getAllByName(host)); + + selectAddresses(); + + if (nameAddr != null && hasHostName(nameAddr)) { + setDomainAndName(nameAddr.getCanonicalHostName()); + } else { + setDomainAndName(host); + } + if (best4 != null) { + setProperty(ADDR4, best4.getHostAddress()); + } else { + setProperty(ADDR4, DEF_REM_ADDR4); + } + if (best6 != null) { + setProperty(ADDR6, best6.getHostAddress()); + } else { + setProperty(ADDR6, DEF_REM_ADDR6); + } + } catch (Exception e) { + log("Error retrieving remote host information for host:" + host + + ".", e, Project.MSG_WARN); + setDomainAndName(host); + setProperty(ADDR4, DEF_REM_ADDR4); + setProperty(ADDR6, DEF_REM_ADDR6); + } + } + + private void setDomainAndName(String fqdn) { + int idx = fqdn.indexOf('.'); + if (idx > 0) { + setProperty(NAME, fqdn.substring(0, idx)); + setProperty(DOMAIN, fqdn.substring(idx+1)); + } else { + setProperty(NAME, fqdn); + setProperty(DOMAIN, DEF_DOMAIN); + } + } + + private void setProperty(String name, String value) { + getProject().setNewProperty(prefix + name, value); + } + +} |