mirror of
https://github.com/unraid/webgui.git
synced 2025-12-30 22:20:23 -06:00
97 lines
2.8 KiB
Bash
Executable File
97 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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#
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# script: monitor_interface
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#
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# Monitors a given list of interfaces and add or remove static IP addresses to these interfaces.
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# The list of interfaces is provided in the file '/var/local/emhttp/statics.ini'
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# This file is maintained by the script 'create_network_ini' which keep track of all IP assignments.
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#
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# By removing static IP addresses from inactive interfaces, these interfaces do not longer interfere with wireless.
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# In other words the wired connection can be pulled without consequences.
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#
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# Bergware - modified for Unraid OS, June 2025
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FILE=/var/local/emhttp/statics.ini
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SYSTEM=/sys/class/net
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md5(){
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[[ -r $FILE ]] && md5sum $FILE | awk '{print $1;exit}'
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}
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port(){
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[[ -e $SYSTEM/$1 ]]
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}
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carrier(){
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cat $SYSTEM/$1/carrier 2>/dev/null
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}
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state(){
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local n NEW OLD HOLD
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OLD=$(carrier $1)
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HOLD=4
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# new state should hold for at least 4 seconds
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for n in {1..4}; do
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sleep 1
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NEW=$(carrier $1)
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[[ $NEW != $OLD ]] && ((HOLD--))
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done
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[[ $HOLD -eq 0 ]] && echo $NEW || echo $OLD
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}
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init(){
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TASK=()
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if [[ -r $FILE ]]; then
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# initialize values from file, maintained by 'create_network_ini'
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while IFS=$'\n' read -r ROW; do
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TASK+=("$ROW")
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done <$FILE
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fi
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MD5=$(md5)
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}
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while :; do
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if port wlan0; then
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# monitor file content changes
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[[ $MD5 != $(md5) ]] && init
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LAST=
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for i in ${!TASK[@]}; do
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ADDR=(${TASK[$i]})
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PORT=${ADDR[0]}
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if port $PORT; then
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[[ $LAST != ${PORT%.*} ]] && STATE=$(state ${PORT%.*})
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case ${ADDR[1]} in
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GW4)
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if [[ $STATE == 1 ]]; then
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# no existing default and new default is defined?
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IPV4=$(ip -4 -br addr show scope global primary dev $PORT | awk '{print $3;exit}')
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[[ -n $IPV4 && "${TASK[$i]}" =~ "default" && -z $(ip -4 route show to default dev $PORT) ]] && ip -4 route add dev ${TASK[$i]/GW4/}
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fi
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;;
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GW6)
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if [[ $STATE == 1 ]]; then
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# no existing default and new default is defined?
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IPV6=$(ip -6 -br addr show scope global primary -deprecated dev $PORT | awk '{print $3;exit}')
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[[ -n $IPV6 && "${TASK[$i]}" =~ "default" && -z $(ip -6 route show to default dev $PORT) ]] && ip -6 route add dev ${TASK[$i]/GW6/}
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fi
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;;
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*)
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case $STATE in
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0) # down
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# IP address present, remove it
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[[ -n $(ip -br addr show to ${ADDR[1]%/*} dev $PORT) ]] && ip addr del dev ${TASK[$i]}
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;;
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1) # up
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# IP address not present? create it
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[[ ! -f /var/tmp/$PORT.down && -z $(ip -br addr show to ${ADDR[1]%/*} dev $PORT) ]] && ip addr add dev ${TASK[$i]}
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esac
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esac
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LAST=${PORT%.*}
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fi
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done
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fi
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# check every 3 seconds
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sleep 3
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done &
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