com.voytechs.jnetstream.io
Class PcapOutputStream

java.lang.Object
  java.io.OutputStream
      com.voytechs.jnetstream.io.ProtocolDataOutputStream
          com.voytechs.jnetstream.io.PacketOutputStream
              com.voytechs.jnetstream.io.CaptureOutputStream
                  com.voytechs.jnetstream.io.PcapOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class PcapOutputStream
extends CaptureOutputStream

Output stream which writes out a capture file in PCAP format. If the InputStream is also a PCAP stream, then all original PCAP header information is copied into the new OutputStream. Otherwise all parameters of the new PcapOutputStream are created from scratch (i.e. the latest support file format, instead of the original version of PCAP found in InputStream.)

These examples demonstrates how InputStream and OutputStream can be used to copy between files.

First example is a simple copy. No format or file version conversion is done:

 PacketInputStream in = new PcapInputStream("oldfile.pcap");
 PacketOutputStream out = new PcapOutputStream("newfile.pcap", in); // get META from 'in'









Field Summary




protected  java.lang.String
FORMAT_NAME



           


 
Fields inherited from class com.voytechs.jnetstream.io.ProtocolDataOutputStream
bitsLeft, cachedByte, out
 



Constructor Summary
PcapOutputStream(java.io.OutputStream out)



          Uses the given output stream to write new capture file.
PcapOutputStream(java.lang.String file)



          uses the given file to write new capture file.
 



Method Summary




 void
initPacketStream()



          Write out the main capture file header into the capture stream.



static void
main(java.lang.String[] args)



          Test function for PcapOutputStream



protected  void
writeRecordHeader(long captureSecs,
                  int captureNanos,
                  long snaplen,
                  long length)



          Write out the record header into the capture stream.


 
Methods inherited from class com.voytechs.jnetstream.io.CaptureOutputStream
close, copy, nextPacket, nextPacket
 
Methods inherited from class com.voytechs.jnetstream.io.PacketOutputStream
write
 
Methods inherited from class com.voytechs.jnetstream.io.ProtocolDataOutputStream
flush, unloadCachedByte, write, write, write, writeByte, writeInt, writeL, writeLByte, writeLInt, writeLLong, writeLong, writeLShort, writeShort, writeUByte, writeUInt, writeULByte, writeULInt, writeULLong, writeULong, writeULShort, writeUShort
 
Methods inherited from class java.io.OutputStream
write
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 





Field Detail



FORMAT_NAME
protected java.lang.String FORMAT_NAME








Constructor Detail



PcapOutputStream
public PcapOutputStream(java.io.OutputStream out)
                 throws java.io.IOException,
                        StreamFormatException

Uses the given output stream to write new capture file. No META data is extracted.


Parameters:
out - Output stream to new capture file.
Throws:
java.io.IOException
StreamFormatException




PcapOutputStream
public PcapOutputStream(java.lang.String file)
                 throws java.io.FileNotFoundException,
                        java.io.IOException,
                        StreamFormatException

uses the given file to write new capture file. No META data is extracted.


Parameters:
file - Filename of the output capture file.
Throws:
FileNotFound - If file can not be opened.
java.io.FileNotFoundException
java.io.IOException
StreamFormatException





Method Detail



initPacketStream
public void initPacketStream()
                      throws java.io.IOException

Write out the main capture file header into the capture stream.


Specified by:
initPacketStream in class CaptureOutputStream



Throws:
java.io.IOException - Any I/O errors while writting the header.





writeRecordHeader
protected void writeRecordHeader(long captureSecs,
                                 int captureNanos,
                                 long snaplen,
                                 long length)
                          throws java.io.IOException

Write out the record header into the capture stream.


Specified by:
writeRecordHeader in class CaptureOutputStream



Throws:
java.io.IOException - Any I/O errors while writting the header.





main
public static void main(java.lang.String[] args)

Test function for PcapOutputStream


Parameters:
args - command line arguments