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Added out_of_order metrics and CSV output option #1

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Added out_of_order metrics and CSV output option #1

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29 changes: 22 additions & 7 deletions percent-retransmissions.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
# percent-retransmissions.sh begins on the previous line

# This macro uses tshark to calculate the percentage of retransmitted packets
# in a packet trace. Claculation is based on the soutrce IP address and
# in a packet trace. Calculation is based on the soutrce IP address and
# tshark stream number. The calculation is the number of retransmitted segments
# containing data from a given IP address in a given TCP stream divided by the
# number of not retransmitted segments containing data from that host in that
Expand Down Expand Up @@ -42,7 +42,7 @@ PERCENTRETRANSMISSIONS="1.1_2017-06-01"
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

if [ $# -ne 1 ]
if [ $# -ne 1 -a $# -ne 2 ]
then echo "Usage:"
echo " percent-retransmissions.sh FILE"
echo " FILE is the name of the trace file to be analyzed"
Expand All @@ -53,6 +53,7 @@ fi

FILE="$1"

CSV="$2"

if [ ! -e $FILE ]
then echo "Could not find input file $FILE"
Expand All @@ -79,7 +80,7 @@ echo percent-retransmissions.sh "$FILE"

tshark -r $FILE -Y "tcp.len > 0" -T fields -e tcp.stream \
-e ip.src -e tcp.srcport -e ip.ttl -e ip.dst -e tcp.dstport \
-e tcp.analysis.retransmission | sort | uniq -c \
-e tcp.analysis.retransmission -e tcp.analysis.out_of_order | sort | uniq -c \
> /tmp/percent-retransmissions-1

# scan temporary file for retransmissions (column 8 > 0) and write those lines
Expand All @@ -97,16 +98,30 @@ awk '($8 > 0) {print $0}' /tmp/percent-retransmissions-1 > \
cat /tmp/percent-retransmissions-2 | \
while read count stream sip sp ttl dip dp retran; do
egrep "$stream\s*$sip\s*$sp\s*$ttl\s*$dip\s*$dp" \
/tmp/percent-retransmissions-1 | tr "\n" " "; echo; done > \
/tmp/percent-retransmissions-1 | awk 1 ORS=' ' ; echo; done > \
/tmp/percent-retransmissions-3

cat /tmp/percent-retransmissions-3 | uniq > /tmp/percent-retransmissions-4

# Finally, for each line in temporary file -3 extract out the not-retransmitted
# count, the TCP stream source IP/port and destination IP/port, the TTL and the
# retransmition count and write a formated line showing that and the calcuated
# retransmission count and write a formated line showing that and the calcuated
# retransmission percentage

awk '{print "Stream: " $2 " " $3 ":" $4 " -> " $6 ":" $7 " TTL: " $5 " " \
$8 "/" $1 "*100 = " $8/$1*100}' /tmp/percent-retransmissions-3
if [ -z $CSV ]
then
awk '{print "Stream: " $2 " " $3 ":" $4 " -> " $6 ":" $7 " " \
" retrans+out_of_order " $8+$16 "/" $1 " " ($8+$16)/$1*100 \
" retrans " $16 "/" $1 " " $16/$1*100 \
" out_of_order " $8 "/" $1 " " $8/$1*100}' /tmp/percent-retransmissions-4
else
echo "Stream,Server,Client,TotalPackets,%retrans_out_of_order,count_retrans_out_of_order,%Retrans,count_retrans,%out_Of_order,count_out_of_order"
awk '{print $2 "," $3 ":" $4 "," $6 ":" $7 "," $1 "," \
($8+$16)/$1*100 "," $8+$16 "," \
$16/$1*100 "," $16 "," \
$8/$1*100 "," $8 }' /tmp/percent-retransmissions-4
fi


#
# percent-retransmissions.sh ends here