TargetIPv4


1   
2   /*
3    * GNetWatch
4    * Copyright 2006, 2007 Alexandre Fenyo
5    * gnetwatch@fenyo.net
6    *
7    * This file is part of GNetWatch.
8    *
9    * GNetWatch is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * GNetWatch is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   * GNU General Public License for more details.
18   *
19   * You should have received a copy of the GNU General Public License
20   * along with GNetWatch; if not, write to the Free Software
21   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
22   */
23  
24  package net.fenyo.gnetwatch.targets;
25  
26  import net.fenyo.gnetwatch.*;
27  import net.fenyo.gnetwatch.actions.*;
28  import net.fenyo.gnetwatch.data.*;
29  import net.fenyo.gnetwatch.GUI.GUI;
30  import net.fenyo.gnetwatch.GUI.VisualElement;
31  
32  import org.apache.commons.logging.Log;
33  import org.apache.commons.logging.LogFactory;
34  import org.snmp4j.PDU;
35  import org.snmp4j.event.ResponseEvent;
36  import org.snmp4j.event.ResponseListener;
37  
38  import java.net.*;
39  
40  /**
41   * TargetIPv4 implements an IPv4 capable target.
42   * @author Alexandre Fenyo
43   * @version $Id: TargetIPv4.java,v 1.27 2007/03/09 22:44:20 fenyo Exp $
44   */
45  
46  public class TargetIPv4 extends Target {
47    private static Log log = LogFactory.getLog(TargetIPv4.class);
48  
49    private Inet4Address address; // not null
50    private SNMPQuerier snmp_querier;
51    private IPQuerier ip_querier;
52  
53    /**
54     * Constructor.
55     * @param name target name.
56     * @param address IPv4 address.
57     * @param SNMPManager snmp manager.
58     * @throws AlgorithmException exception.
59     */
60    // GUI thread
61    public TargetIPv4(final String   name, final Inet4Address address, final SNMPManager snmp_manager) throws AlgorithmException {
62      super(name);
63      if (address == null) throw new AlgorithmException("address is null");
64      this.address = address;
65      snmp_querier = snmp_manager != null ? snmp_manager.getQuerier(address) : null;
66      setItem(address.getHostAddress());
67      ip_querier = new IPQuerier(address);
68      // may last a long time (DNS resolver)
69      // setDescription(address.getCanonicalHostName());
70    }
71  
72    /**
73     * Checks that this host is SNMP capable.
74     * @param none.
75     * @return void.
76     */
77  // PENSER a changer l'icone en cas d'action SNMP qui marche car si ici ca a fait timeout... ET a mettre a jour le type
78    // faire drop action nmap et drop view nmap
79    public void checkSNMPAwareness() {
80      snmp_querier.getSysDescr(new SNMPQuerier.QuerierListener() {
81        public void onResponse(ResponseEvent event) {
82          getGUI().setStatus(getGUI().getConfig().getPattern("discovered_snmp", getAddress().toString().substring(1)));
83          getGUI().appendConsole(getGUI().getConfig().getPattern("discovered_snmp", getAddress().toString().substring(1)) + "<BR/>");
84          setImageHostSNMP();
85  
86          if (event != null && event.getResponse() != null && event.getResponse().size() > 0 &&
87              event.getResponse().get(0) != null && event.getResponse().get(0).getVariable() != null)
88            setType(event.getResponse().get(0).getVariable().toString());
89          else log.error("got a bad SNMP response");
90        }
91  
92        public void onTimeout(ResponseEvent event) {
93          getGUI().setStatus(getGUI().getConfig().getPattern("snmp_timeout", getAddress().toString().substring(1)));
94        }
95      });
96    }
97  
98    /**
99     * Returns the SNMP querier.
100    * @param none.
101    * @return SNMPQuerier querier instance.
102    */
103   public SNMPQuerier getSNMPQuerier() {
104     return snmp_querier;
105   }
106 
107   /**
108    * Returns the IP querier.
109    * @param none.
110    * @return IPQuerier querier instance.
111    */
112   public IPQuerier getIPQuerier() {
113     return ip_querier;
114   }
115 
116   /**
117    * Returns the IP address.
118    * @param none.
119    * @return Inet4Address IP address.
120    */
121   // any thread
122   public Inet4Address getAddress() {
123     return address;
124   }
125 
126   /**
127    * Checks that the parameter can be attached to this target.
128    * @param visual_element parameter to check.
129    * @return true if the parameter can be attached to this target.
130    */
131   public boolean canManageThisChild(final VisualElement visual_element) {
132     if (ActionPing.class.isInstance(visual_element)) return true;
133     if (ActionFlood.class.isInstance(visual_element)) return true;
134     if (ActionSNMP.class.isInstance(visual_element)) return true;
135     if (EventReachable.class.isInstance(visual_element)) return true;
136     if (TargetInterface.class.isInstance(visual_element)) return true;
137     if (ActionHTTP.class.isInstance(visual_element)) return true;
138     if (ActionNmap.class.isInstance(visual_element)) return true;
139     return false;
140   }
141 
142   /**
143    * Initializes this target.
144    * @param gui current GUI instance.
145    * @return void.
146    */
147   // final because called by constructor (by means of setItem())
148   public final void initialize(final GUI gui) {
149     super.initialize(gui);
150     if (gui != null) setImageHost();
151   }
152 
153   /**
154    * Attaches this target to a specific parent.
155    * @param gui current GUI instance.
156    * @param parent parent.
157    * @return true if this target has been succesfully attached.
158    */
159   public boolean addTarget(final GUI gui, final VisualElement parent) {
160     initialize(gui);
161 
162     if (!canAddTarget(parent)) return false;
163     if (parent != null && !parent.canManageThisChild(this)) return false;
164 
165     final boolean is_new = !getGUI().containsCanonicalInstance(this);
166     final TargetIPv4 target_ipv4 = (TargetIPv4) getGUI().getCanonicalInstance(this);
167 
168     if (!getGUI().getVisualTransientAll().contains(target_ipv4)) target_ipv4.setParent(getGUI(), getGUI().getVisualTransientAll());
169 
170     final String   addr_str = GenericTools.inet4AddressToString(target_ipv4.getAddress());
171     final String   net_str = GenericTools.getNetFromAddress(addr_str);
172 
173     if (addr_str == null || net_str == null) {
174       if (is_new) getGUI().dropTargetInstance(target_ipv4);
175       log.error("addr_str or net_str is null - " + getItem());
176       return false;
177     }
178 
179     Inet4Address net_addr = null;
180     Inet4Address net_netmask = null;
181 
182     try {
183       if (net_str.endsWith("/4")) {
184         
185         net_addr = (Inet4Address)
186         InetAddress.getByName(GenericTools.unsignedByteToShort(address.getAddress()[0]) < 240 ?
187             "224.0.0.0" : "240.0.0.0");
188         net_netmask = (Inet4Address) InetAddress.getByName("240.0.0.0");
189       }
190 
191       if (net_str.endsWith("/8")) {
192         net_addr = (Inet4Address) InetAddress.getByName(net_str.substring(0, net_str.length() - 2));
193         net_netmask = (Inet4Address) InetAddress.getByName("255.0.0.0");
194       }
195 
196       if (net_str.endsWith("/16")) {
197         net_addr = (Inet4Address) InetAddress.getByName(net_str.substring(0, net_str.length() - 3));
198         net_netmask = (Inet4Address) InetAddress.getByName("255.255.0.0");
199       }
200 
201       if (net_str.endsWith("/24")) {
202         net_addr = (Inet4Address) InetAddress.getByName(net_str.substring(0, net_str.length() - 3));
203         net_netmask = (Inet4Address) InetAddress.getByName("255.255.255.0");
204       }
205     } catch (final UnknownHostException ex) {
206       if (is_new) getGUI().dropTargetInstance(target_ipv4);
207       log.error("Exception", ex);
208       return false;
209     }
210 
211     TargetIPv4Subnet subnet;
212     try {
213       subnet = new TargetIPv4Subnet(addr_str, net_addr, net_netmask);
214     } catch (final AlgorithmException ex) {
215       if (is_new) getGUI().dropTargetInstance(target_ipv4);
216       log.error("Exception", ex);
217       return false;
218     }
219 
220     subnet = (TargetIPv4Subnet) getGUI().getCanonicalInstance(subnet);
221     if (!getGUI().getVisualTransientNetworks().contains(subnet)) subnet.setParent(getGUI(), getGUI().getVisualTransientNetworks());
222     if (!subnet.contains(target_ipv4)) target_ipv4.setParent(getGUI(), subnet);
223 
224     if (parent != null) target_ipv4.setParent(getGUI(), parent);
225 
226     return is_new;
227   }
228 
229   /**
230    * Attaches this target to a specific parent defined by its address.
231    * @param gui current GUI instance.
232    * @param addr_str parent address.
233    * @return true if this target has been succesfully attached.
234    */
235   public static void addTargetIPv4(final GUI gui, final String   addr_str) {
236     try {
237       synchronized (gui.sync_tree) {
238         final TargetIPv4 foo = new TargetIPv4(addr_str, (Inet4Address) InetAddress.getByName(addr_str), gui.getSNMPManager());
239         if (gui.containsCanonicalInstance(foo)) return;
240         gui.asyncExecIfNeeded(new Runnable  () {
241           public void run() {
242             synchronized (gui.sync_tree) {
243               if (gui.containsCanonicalInstance(foo)) return;
244               if (foo.addTarget(gui, (VisualElement) null) == true) {
245                 gui.setStatus(gui.getConfig().getPattern("adding_target", foo.getAddress().toString().substring(1)));
246                 foo.checkSNMPAwareness();
247               }
248             }
249           }
250         });
251       }
252     } catch (final AlgorithmException ex) {
253       log.error("Exception", ex);
254     } catch (final UnknownHostException ex) {
255       log.error("Exception", ex);
256     }
257   }
258 
259   /**
260    * Compares two targets.
261    * @param o target to compare to.
262    * @return true if the targets are equal.
263    */
264   // any thread
265   public boolean equals(final Object   o) {
266     if (this == o) return true;
267     if ((o == null) || (o.getClass() != getClass())) return false;
268     final TargetIPv4 target = (TargetIPv4) o;
269     return getAddress().equals(target.getAddress());
270   }
271   
272   /**
273    * Returns the hashcode for this target.
274    * @param none.
275    * @return int hashcode.
276    */
277   // any thread
278   public int hashCode() {
279     return getAddress().hashCode();
280   }
281 }
282
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