mirror of
https://github.com/Ysurac/openmptcprouter-feeds.git
synced 2025-03-09 15:40:03 +00:00
69 lines
1.3 KiB
Bash
Executable file
69 lines
1.3 KiB
Bash
Executable file
#!/bin/sh
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. /usr/share/libubox/jshn.sh
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PIDFILE="/var/run/packet_capture.pid"
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if [ -f "$PIDFILE"];then
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echo "error: Packet capture is running"
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exit 1
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fi
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json_load "$1"
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json_get_var interface interface
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json_get_var filter filter
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json_get_var duration duration
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json_get_var packets packets
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json_get_var verbose verbose
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json_get_var domains domains
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json_get_var file file
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args="-n"
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if [ "$domains" == "1" ];then
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args=""
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fi
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if [ -n "$interface" ];then
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ip a show "$interface" > /dev/null 2>&1
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if [ "$?" == "1" ]; then
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echo "error: Incorrect format of an interface"
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exit 1
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fi
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args="$args -i $interface"
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fi
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if [ -n "$packets" ];then
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echo "$packets" | egrep '^[0-9]*$'
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if [ "$?" -eq 0 ];then
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args="$args -c $packets"
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else
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echo "error: Incorrect packets argument"
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exit 1
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fi
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fi
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if [ "$verbose" == "1" ];then
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args="$args -e"
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fi
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if [ "$file" == "1" ];then
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mem=$(awk '/MemTotal/ {print $2}' /proc/meminfo)
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args="$args -W 2 -C $((mem/(1024 * 10))) -w /tmp/capture.pcap -z /usr/libexec/packet_capture_stop"
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fi
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if [ -n "$filter" ];then
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tcpdump -i lo -d "$filter" >/dev/null 2>/dev/null
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if [ $? -eq 1 ];then
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echo "error: Incorrect filter argument"
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exit 1
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fi
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echo "$filter" > /tmp/tcpdump_filter
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fi
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(/usr/libexec/packet_capture "$args" "$duration")&
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echo $! > /var/run/packet_capture.pid
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exit 0
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