ttcn3-tcpdump-start.sh: reduce snaplen of tcpdump
Improve speed of tcpdump startup. -s 0 sets the snaplen is 256k. tcpdump will request the snaplen multiplied by the buffer as a contigous buffer in the kernel. This could lead to higher start time. Change-Id: I8a372e71798b366faa3b723573c60de6e8fd128f
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@ -20,7 +20,7 @@ if [ "$(id -u)" = "0" ]; then
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else
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CMD="sudo $TCPDUMP"
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fi
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$CMD -U -s 0 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 &
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$CMD -U -s 1500 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >$TTCN3_PCAP_PATH/$TESTCASE.pcap.stdout 2>&1 &
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PID=$!
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echo $PID > $PIDFILE
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@ -31,7 +31,7 @@ ping 127.0.0.1 >/dev/null 2>&1 &
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PID=$!
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i=0
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while [ ! -f "$TTCN3_PCAP_PATH/$TESTCASE.pcap" ] ||
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[ "$($TCPDUMP -r "$TTCN3_PCAP_PATH/$TESTCASE.pcap" 2>/dev/null | wc -l)" -eq 0 ]
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[ "$(stat -c '%s' "$TTCN3_PCAP_PATH/$TESTCASE.pcap")" -eq 32 ]
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do
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echo "Waiting for tcpdump to start... $i"
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sleep 1
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