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Merge pull request #764 from ejoerns/pull-req/cooja-fraghead

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[Cooja] Simple fragmentation header analyzer
This commit is contained in:
Fredrik Österlind 2014-08-06 09:32:57 +02:00
commit 8b72ab49c0
2 changed files with 82 additions and 0 deletions
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3
tools/cooja/java/org/contikios/cooja/plugins/RadioLogger.java
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@ -93,6 +93,7 @@ import org.contikios.cooja.Simulation;
import org.contikios.cooja.VisPlugin;
import org.contikios.cooja.dialogs.TableColumnAdjuster;
import org.contikios.cooja.interfaces.Radio;
import org.contikios.cooja.plugins.analyzers.FragHeadPacketAnalyzer;
import org.contikios.cooja.plugins.analyzers.ICMPv6Analyzer;
import org.contikios.cooja.plugins.analyzers.IEEE802154Analyzer;
import org.contikios.cooja.plugins.analyzers.IPHCPacketAnalyzer;
@ -172,6 +173,7 @@ public class RadioLogger extends VisPlugin {
ArrayList<PacketAnalyzer> lowpanAnalyzers = new ArrayList<PacketAnalyzer>();
lowpanAnalyzers.add(new IEEE802154Analyzer(false));
lowpanAnalyzers.add(new FragHeadPacketAnalyzer());
lowpanAnalyzers.add(new IPHCPacketAnalyzer());
lowpanAnalyzers.add(new IPv6PacketAnalyzer());
lowpanAnalyzers.add(new ICMPv6Analyzer());
@ -179,6 +181,7 @@ public class RadioLogger extends VisPlugin {
analyzerWithPcap = new IEEE802154Analyzer(true);
ArrayList<PacketAnalyzer> lowpanAnalyzersPcap = new ArrayList<PacketAnalyzer>();
lowpanAnalyzersPcap.add(analyzerWithPcap);
lowpanAnalyzersPcap.add(new FragHeadPacketAnalyzer());
lowpanAnalyzersPcap.add(new IPHCPacketAnalyzer());
lowpanAnalyzersPcap.add(new IPv6PacketAnalyzer());
lowpanAnalyzersPcap.add(new ICMPv6Analyzer());

79
tools/cooja/java/org/contikios/cooja/plugins/analyzers/FragHeadPacketAnalyzer.java Normal file
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@ -0,0 +1,79 @@
/*
* Copyright (c) 2014, TU Braunschweig
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package org.contikios.cooja.plugins.analyzers;
/**
* Analyzes the fragmentation header if present.
*
* @author Enrico Jorns
*/
public class FragHeadPacketAnalyzer extends PacketAnalyzer {
public final static int SICSLOWPAN_DISPATCH_FRAG1 = 0xc0; /* 1100 0xxx */
public final static int SICSLOWPAN_DISPATCH_FRAGN = 0xe0; /* 1110 0xxx */
@Override
public boolean matchPacket(Packet packet) {
return packet.level == NETWORK_LEVEL && (packet.get(0) & 0xD8) == SICSLOWPAN_DISPATCH_FRAG1;
}
@Override
public int analyzePacket(Packet packet, StringBuilder brief, StringBuilder verbose) {
int hdr_size = 0;
verbose.append("<b>Frag Header</b> ");
if ((packet.get(0) & 0xF8) == SICSLOWPAN_DISPATCH_FRAG1) {
hdr_size = 4;
brief.append("FRAG1");
verbose.append("first<br/>");
} else if ((packet.get(0) & 0xF8) == SICSLOWPAN_DISPATCH_FRAGN) {
hdr_size = 5;
brief.append("FRAGN");
verbose.append("nth<br/>");
}
int datagram_size = ((packet.get(0) & 0x07) << 8) + packet.get(1);
int datagram_tag = packet.getInt(2, 2);
verbose.append("size = ").append(datagram_size)
.append(", tag = ").append(String.format("0x%04x", datagram_tag));
if (hdr_size == 5) {
verbose.append(", offset = ").append(packet.get(4) * 8);
}
packet.pos += hdr_size;
return ANALYSIS_OK_CONTINUE;
}
}