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Make PcapExporter record timestamps with preserving packet intervals

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This commit is contained in:
Yasuyuki Tanaka 2016-02-04 17:24:29 +01:00
parent 9b3e334c7d
commit 15d30b1125
5 changed files with 25 additions and 8 deletions
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13
tools/cooja/java/org/contikios/cooja/Simulation.java
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@ -71,6 +71,7 @@ public class Simulation extends Observable implements Runnable {
private long speedLimitLastSimtime;
private long speedLimitLastRealtime;
private long lastStartTime;
private long currentSimulationTime = 0;
private String title = null;
@ -248,7 +249,7 @@ public class Simulation extends Observable implements Runnable {
}
public void run() {
long lastStartTime = System.currentTimeMillis();
lastStartTime = System.currentTimeMillis();
logger.info("Simulation main loop started, system time: " + lastStartTime);
isRunning = true;
speedLimitLastRealtime = System.currentTimeMillis();
@ -1074,6 +1075,16 @@ public class Simulation extends Observable implements Runnable {
return currentSimulationTime / MILLISECOND;
}
/**
* Return the actual time value corresponding to an argument which
* is a simulation time value in microseconds.
*
* @return Actual time (microseconds)
*/
public long convertSimTimeToActualTime(long simTime) {
return simTime + lastStartTime * 1000;
}
/**
* Changes radio medium of this simulation to the given.
*

4
tools/cooja/java/org/contikios/cooja/plugins/RadioLogger.java
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@ -694,8 +694,8 @@ public class RadioLogger extends VisPlugin {
StringBuilder verbose = new StringBuilder();
/* default analyzer */
PacketAnalyzer.Packet packet = new PacketAnalyzer.Packet(data, PacketAnalyzer.MAC_LEVEL);
PacketAnalyzer.Packet packet = new PacketAnalyzer.Packet(data, PacketAnalyzer.MAC_LEVEL,
simulation.convertSimTimeToActualTime(conn.startTime));
if (analyzePacket(packet, brief, verbose)) {
if (packet.hasMoreData()) {
byte[] payload = packet.getPayload();

2
tools/cooja/java/org/contikios/cooja/plugins/analyzers/IEEE802154Analyzer.java
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@ -69,7 +69,7 @@ public class IEEE802154Analyzer extends PacketAnalyzer {
if (pcapExporter != null) {
try {
pcapExporter.exportPacketData(packet.getPayload());
pcapExporter.exportPacketData(packet.getPayload(), packet.getTimestamp());
} catch (IOException e) {
logger.error("Could not export PCap data", e);
}

8
tools/cooja/java/org/contikios/cooja/plugins/analyzers/PacketAnalyzer.java
View File

@ -18,6 +18,7 @@ public abstract class PacketAnalyzer {
int level;
/* size = length - consumed bytes at tail */
int size;
long ts; /* in microseconds */
/* L2 addresseses */
byte[] llsender;
@ -25,10 +26,11 @@ public abstract class PacketAnalyzer {
byte lastDispatch = 0;
public Packet(byte[] data, int level) {
public Packet(byte[] data, int level, long ts) {
this.level = level;
this.data = data.clone();
this.size = data.length;
this.ts = ts;
}
public void consumeBytesStart(int bytes) {
@ -79,6 +81,10 @@ public abstract class PacketAnalyzer {
public byte[] getLLReceiver() {
return llreceiver;
}
public long getTimestamp() {
return ts;
}
};
public abstract boolean matchPacket(Packet packet);

6
tools/cooja/java/org/contikios/cooja/plugins/analyzers/PcapExporter.java
View File

@ -41,15 +41,15 @@ public class PcapExporter {
out = null;
}
public void exportPacketData(byte[] data) throws IOException {
public void exportPacketData(byte[] data, long ts) throws IOException {
if (out == null) {
/* pcap file never set, open default */
openPcap(null);
}
try {
/* pcap packet header */
out.writeInt((int) (System.currentTimeMillis() / 1000));
out.writeInt((int) ((System.currentTimeMillis() % 1000) * 1000));
out.writeInt((int) (ts / 1000000));
out.writeInt((int) (ts % 1000000));
out.writeInt(data.length);
out.writeInt(data.length);
/* and the data */