152 lines
3.8 KiB
Groff
152 lines
3.8 KiB
Groff
.TH dpa 1 "1 Nov 2005"
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.SH NAME
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dpa \- DNS Packet Analyzer. Analyze DNS packets in ip trace files
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.SH SYNOPSIS
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.B dpa
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[
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.IR OPTION
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]
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.IR TRACEFILE
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.SH DESCRIPTION
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\fBdpa\fR 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).
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.SH OPTIONS
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.TP
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\fB-c\fR \fIexpressionlist\fR
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Count occurrences of matching expressions
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.TP
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\fB-f\fR \fIexpression\fR
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Filter: only process packets that match the expression
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.TP
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\fB-h\fR
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Show usage
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.TP
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\fB-p\fR
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Show the total number of correct DNS packets, and percentage of -u and
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-c values (of the total of matching on the -f filter. if no filter is
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given, percentages are on all correct dns packets)
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.TP
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\fB-of\fR \fIfile\fR
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Write all packets that match the -f flag to file, as pcap data.
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.TP
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\fB-ofh\fR \fIfile\fR
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Write all packets that match the -f flag to file, in hexadecimal format,
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readable by drill.
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.TP
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\fB-s\fR
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Show possible match names
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.TP
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\fB-s\fR \fImatchname\fR
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show possible match operators and values for name
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.TP
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\fB-sf\fR
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Only evaluate packets (in representation format) that match the -f filter.
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If no -f was given, evaluate all correct dns packets.
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.TP
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\fB-u\fR \fImatchnamelist\fR
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Count every occurence of every value of the matchname (for instance, count all packetsizes, see EXAMPLES in ldns-dpa(1) ).
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.TP
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\fB-ua\fR
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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.
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.TP
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\fB-uac\fR
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For every matchname in -u, show the average number of times this value was encountered.
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.TP
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\fB-um\fR \fInumber\fR
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Only show the results from -u for values that occurred more than <number> times.
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.TP
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\fB-v\fR \fIlevel\fR
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Set verbosity to level (1-5, 5 being the highest). Mostly used for debugging.
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.TP
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\fB-notip\fR \fIfile\fR
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Write packets that were not recognized as IP packets to file (as pcap data).
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.TP
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\fB-baddns\fR \fIfile\fR
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Write dns packets that were too mangled to parse to file (as pcap data).
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.TP
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\fB-version\fR
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Show version and exit
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.SH LIST AND MATCHES
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A <matchnamelist> is a comma separated list of match names (use -s to see possible match names).
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A <expressionlist> is a comma separated list of expressions.
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An expression has the following form:
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<expr>: (<expr>)
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<expr> | <expr>
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<expr> & <expr>
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<match>
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<match>: <matchname> <operator> <value>
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<operator>:
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= equal to <value>
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!= not equal to <value>
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> greater than <value>
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< lesser than <value>
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>= greater than or equal to <value>
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<= lesser than or equal to <value>
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~= contains <value>
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See the -s option for possible matchnames, operators and values.
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.SH EXAMPLES
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.TP
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ldns-dpa -u packetsize -p test.tr
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Count all different packetsizes in test.tr and show the precentages.
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.TP
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ldns-dpa -f "edns=1&qr=0" -of edns.tr test.tr
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Filter out all edns enable queries in test.tr and put them in edns.tr
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.TP
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ldns-dpa -f edns=1 -c tc=1 -u rcode test.tr
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For all edns packets, count the number of truncated packets and all their rcodes in test.tr.
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.TP
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ldns-dpa -c tc=1,qr=0,qr=1,opcode=QUERY test.tr
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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.
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.TP
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ldns-dpa -u packetsize -ua test.tr
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Show all packet sizes and the average packet size per packet.
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.TP
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ldns-dpa -u srcaddress -uac test.tr
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Show all packet source addresses and the average number of packets sent from this address.
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.TP
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sudo tcpdump -i eth0 -s 0 -U -w - port 53 | ldns-dpa -f qr=0 -sf
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Print all query packets seen on the specified interface.
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.SH AUTHOR
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Written by Jelte Jansen for NLnetLabs.
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.SH REPORTING BUGS
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Report bugs to <jelte@nlnetlabs.nl>.
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.SH COPYRIGHT
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Copyright (C) 2005 NLnet Labs. This is free software. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE.
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