CentOS 7.0 - man page for ldns-dpa (centos section 1)

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dpa(1)											   dpa(1)

       dpa - DNS Packet Analyzer. Analyze DNS packets in ip trace files

       dpa [ OPTION ] TRACEFILE

       dpa  is	used to analyze dns packets in trace files. It has 3 main options: count, filter,
       and count uniques (i.e. count all different occurences).

       -c expressionlist
	      Count occurrences of matching expressions

       -f expression
	      Filter: only process packets that match the expression

       -h     Show usage

       -p     Show the total number of correct DNS packets, and percentage of -u  and  -c  values
	      (of  the total of matching on the -f filter. if no filter is given, percentages are
	      on all correct dns packets)

       -of file
	      Write all packets that match the -f flag to file, as pcap data.

       -ofh file
	      Write all packets that match the -f flag to file, in hexadecimal	format,  readable
	      by drill.

       -s     Show possible match names

       -s matchname
	      show possible match operators and values for name

       -sf    Only  evaluate  packets (in representation format) that match the -f filter.  If no
	      -f was given, evaluate all correct dns packets.

       -u matchnamelist
	      Count every occurence of every value of the  matchname  (for  instance,  count  all
	      packetsizes, see EXAMPLES in ldns-dpa(1) ).

       -ua    For  every  matchname  in  -u, show the average value of all matches. Behaviour for
	      match types that do not have an integer value is undefined.

       -uac   For every matchname in -u, show the average number of times this value was  encoun-

       -um number
	      Only show the results from -u for values that occurred more than <number> times.

       -v level
	      Set verbosity to level (1-5, 5 being the highest). Mostly used for debugging.

       -notip file
	      Write packets that were not recognized as IP packets to file (as pcap data).

       -baddns file
	      Write dns packets that were too mangled to parse to file (as pcap data).

	      Show version and exit

       A  <matchnamelist>  is a comma separated list of match names (use -s to see possible match
       names).	A <expressionlist> is a comma separated list of expressions.

       An expression has the following form: <expr>: (<expr>)
	       <expr> | <expr>
	       <expr> & <expr>

       <match>:        <matchname> <operator> <value>

       <operator>:	=    equal to <value>	   !=	not equal  to  <value>	     >	  greater
       than  <value>	   <	lesser	than  <value>	    >=	 greater than or equal to <value>
	    <=	 lesser than or equal to <value>      ~=   contains <value>

       See the -s option for possible matchnames, operators and values.

       ldns-dpa -u packetsize -p test.tr
	      Count all different packetsizes in test.tr and show the precentages.

       ldns-dpa -f "edns=1&qr=0" -of edns.tr test.tr
	      Filter out all edns enable queries in test.tr and put them in edns.tr

       ldns-dpa -f edns=1 -c tc=1 -u rcode test.tr
	      For all edns packets, count the number of truncated packets and all their rcodes in

       ldns-dpa -c tc=1,qr=0,qr=1,opcode=QUERY test.tr
	      For  all packets, count the number of truncated packets, the number of packets with
	      qr=0, the number of packets with qr=1 and the number of queries in test.tr.

       ldns-dpa -u packetsize -ua test.tr
	      Show all packet sizes and the average packet size per packet.

       ldns-dpa -u srcaddress -uac test.tr
	      Show all packet source addresses and the average number of packets sent  from  this

       sudo tcpdump -i eth0 -s 0 -U -w - port 53 | ldns-dpa -f qr=0 -sf
	      Print all query packets seen on the specified interface.

       Written by Jelte Jansen for NLnetLabs.

       Report bugs to <jelte@nlnetlabs.nl>.

       Copyright  (C)  2005 NLnet Labs. This is free software. There is NO warranty; not even for

					    1 Nov 2005					   dpa(1)
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