ttcn3-tcpdump-stop.sh: Wait to receive last packets before stopping tcpdump
There's a time delay between packets are sent through the system and tcpdump reads, buffers and stores them into the pcap file. We need to give it more time to process everything before killing it, otherwise last (or all) packets from the test are not captured. Change-Id: I240d8f1bdb2ca6ad353e60ef15937dc2bd4cbebd
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#!/bin/sh
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PIDFILE=/tmp/tcpdump.pid
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TESTCASE=$1
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if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
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TTCN3_PCAP_PATH=/tmp
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fi
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# Wait for up to 2 seconds if we keep receiving traffinc from tcpdump,
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# otherwise we might lose last packets from test.
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i=0
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prev_count=-1
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count=$(stat --format="%s" "$TTCN3_PCAP_PATH/$TESTCASE.pcap")
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while [ $count -gt $prev_count ] && [ $i -lt 2 ]
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do
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echo "Waiting for tcpdump to finish... $i (prev_count=$prev_count, count=$count)"
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sleep 1
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prev_count=$count
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count=$(stat --format="%s" "$TTCN3_PCAP_PATH/$TESTCASE.pcap")
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i=$((i+1))
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done
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if [ -e $PIDFILE ]; then
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# NOTE: This requires you to be root or something like
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