ns-3学习手记5

运行wifi-example-db.sh遇到的问题：program ‘tap-device-creator’ not found; available programs are: []，ns3,

解决办法：

（1）查看wifi-example-db.sh源码：

../../waf --run "wifi-example-sim --format=db --distance=$distance --run=run-$distance-$trial "

测试是路径出了问题，单独拿出来运行，也不行，只有将其切换至ns-3.28主目录下运行，其中，出现. ./. .的地方全部修改；另外，gnuplot examples/stats/wifi-example.gnuplot，路径也要修改
修改后的wifi-example-db-my.sh源码：

#!/bin/sh

#DISTANCES="25 50 75 100 125 145 147 150 152 155 157 160 162 165 167 170 172 175 177 180"
#TRIALS="1 2 3 4 5"

#modified by me
DISTANCES="25 50"
TRIALS="1 2"


echo WiFi Experiment Example

pCheck=`which sqlite3`
if [ -z "$pCheck" ]
then
  echo "ERROR: This script requires sqlite3 (wifi-example-sim does not)."
  exit 255
fi

pCheck=`which gnuplot`
if [ -z "$pCheck" ]
then
  echo "ERROR: This script requires gnuplot (wifi-example-sim does not)."
  exit 255
fi

pCheck=`which sed`
if [ -z "$pCheck" ]
then
  echo "ERROR: This script requires sed (wifi-example-sim does not)."
  exit 255
fi

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:bin/

if [ -e ./data.db ]
then
  echo "Kill data.db? (y/n)"
  read ANS
  if [ "$ANS" = "yes" -o "$ANS" = "y" ]
  then
    echo Deleting database
    rm ./data.db
  fi
fi

for trial in $TRIALS
do
  for distance in $DISTANCES
  do
    echo Trial $trial, distance $distance
    ./waf --run "wifi-example-sim --format=db --distance=$distance --run=run-$distance-$trial "
  done
done

#
#Another SQL command which just collects raw numbers of frames receved.
#
#CMD="select Experiments.input,avg(Singletons.value) \
#    from Singletons,Experiments \
#    where Singletons.run = Experiments.run AND \
#          Singletons.name='wifi-rx-frames' \
#    group by Experiments.input \
#    order by abs(Experiments.input) ASC;"

mv ./data.db .

CMD="select exp.input,avg(100-((rx.value*100)/tx.value)) \
    from Singletons rx, Singletons tx, Experiments exp \
    where rx.run = tx.run AND \
          rx.run = exp.run AND \
          rx.variable='receiver-rx-packets' AND \
          tx.variable='sender-tx-packets' \
    group by exp.input \
    order by abs(exp.input) ASC;"

sqlite3 -noheader data.db "$CMD" > wifi-default.data
sed -i.bak "s/|/   /" wifi-default.data
rm wifi-default.data.bak
gnuplot examples/stats/wifi-example.gnuplot

echo "Done; data in wifi-default.data, plot in wifi-default.eps"

（2）并将，wifi-example-db-my.sh放在ns-3.28目录下，运行

运行结果：（将参数改小了）

larry@larry-VirtualBox:~/ns-3-allinone/ns-3.28$ ./wifi-example-db-my.sh 
WiFi Experiment Example
Kill data.db? (y/n)
y
Deleting database
Trial 1, distance 25
Waf: Entering directory `/home/larry/ns-3-allinone/ns-3.28/build'
Waf: Leaving directory `/home/larry/ns-3-allinone/ns-3.28/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (1.468s)
Trial 1, distance 50
Waf: Entering directory `/home/larry/ns-3-allinone/ns-3.28/build'
Waf: Leaving directory `/home/larry/ns-3-allinone/ns-3.28/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (1.480s)
Trial 2, distance 25
Waf: Entering directory `/home/larry/ns-3-allinone/ns-3.28/build'
Waf: Leaving directory `/home/larry/ns-3-allinone/ns-3.28/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (1.443s)
Trial 2, distance 50
Waf: Entering directory `/home/larry/ns-3-allinone/ns-3.28/build'
Waf: Leaving directory `/home/larry/ns-3-allinone/ns-3.28/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (1.432s)
mv: './data.db' and './data.db' are the same file
Done; data in wifi-default.data, plot in wifi-default.eps