7778ce70ed
- Klammern um if-Statements - == als Vergleichsoperator gibts nur in der Bash, wir haben aber nur sh (ash) verfuegbar es ist nicht auszuschliessen, dass die Aenderungen nun andere Fehler zur Folge haben, wo vorher keine waren, da das Script doch irgendwie die "richtigen" Werte hatte. Die bourne shell (sh) ist nicht so umfangreich wie die bourne again shell (bash).
174 lines
4 KiB
Bash
Executable file
174 lines
4 KiB
Bash
Executable file
#!/bin/ash
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test -f /tmp/started || exit
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# environment
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. "/tmp/environment" || exit 1
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# constants
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MINUTE=60
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HOUR=3600
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DAY=86400
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TIMEOUT_SHORT=$((4*$MINUTE))
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TIMEOUT_MEDIUM=$((29*$MINUTE))
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TIMEOUT_LONG=$DAY
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ORIGINATOR_QUALITY_MIN=50
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CLIENT_AGE_MAX=60
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STATEFILE="/tmp/wlanwatchdogstate"
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DEBUGFILE="/root/wlanwatchdog_debug.log.gz"
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# variables
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STATE=
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SINCE=
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# functions
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debug_output() {
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echo "==== DEBUG OUTPUT ===="
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echo "date: $(date)"
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echo "=== INTERFACES ==="
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ifconfig 2>&1
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echo "=== BATMAN ==="
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echo "== ORIGINATORS =="
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batctl o 2>&1
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echo "== STATISTICS =="
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batctl s 2>&1
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echo "== GATEWAYS =="
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batctl gwl 2>&1
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echo "=== BRIDGE ==="
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echo "== $BRIDGE_INTERFACE =="
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brctl showmacs $BRIDGE_INTERFACE 2>&1
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echo "=== CONNECTIVITY TESTS ==="
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echo "== PING GATEWAY OVER MESH =="
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ping -6 -c3 $(uci get configurator.@api[0].ipv6_address)%$(uci get configurator.@api[0].ipv6_interface) 2>&1
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echo "== PING HOST OVER INTERNET =="
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ping -4 -c3 freifunk-ol.de 2>&1
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echo "=== WLAN ==="
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echo "== $WLAN_CLIENT_INTERFACE =="
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iw dev $WLAN_CLIENT_INTERFACE station dump 2>&1
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echo "== $WLAN_MESH_INTERFACE =="
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iw dev $WLAN_MESH_INTERFACE station dump 2>&1
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echo "== SCAN =="
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iwlist scanning 2>&1
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echo "=== WATCHDOG LOG ==="
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cat "/var/log/wlanwatchdog.log"
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}
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get_time() {
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date +%s
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}
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count_originators() {
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local COUNT=0
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if [ -n "$BATMAN_INTERFACE" ]; then
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COUNT=$(tail -n +3 /sys/kernel/debug/batman_adv/$BATMAN_INTERFACE/originators 2> /dev/null | \
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grep "$1" | \
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grep -o "^\([0-9a-f]\{2\}:\?\)\+[[:space:]]\+[0-9.]\+s[[:space:]]\+([ 0-9]\+)" | \
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cut -d\( -f2 | \
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cut -d\) -f1 | \
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tr -d " " | \
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awk -vlimit=$ORIGINATOR_QUALITY_MIN '$1>=limit{print $1}' | \
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wc -l)
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fi
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echo $COUNT
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}
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count_clients() {
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local COUNT=0
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local NUMBER=
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if [ -n "$BRIDGE_INTERFACE" ] && [ -n "$WLAN_CLIENT_INTERFACE" ]; then
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NUMBER=$(brctl showstp $BRIDGE_INTERFACE 2> /dev/null | \
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grep -e "^$WLAN_CLIENT_INTERFACE " | \
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cut -d" " -f2 | \
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tr -d "()")
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fi
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if [ -n "$BRIDGE_INTERFACE" ] && [ -n "$NUMBER" ]; then
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COUNT=$(brctl showmacs "^$BRIDGE_INTERFACE " 2> /dev/null | \
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grep -o "^[[:space:]]*$NUMBER[[:space:]]\+\([0-9a-f]\{2\}:\?\)\+[[:space:]]\+no[[:space:]]\+[0-9]\+" | \
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tr "\t" " " | \
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tr -s " " | \
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cut -d" " -f5 | \
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awk -vlimit=$CLIENT_AGE_MAX '$1<=limit{print $1}' | \
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wc -l)
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fi
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echo $COUNT
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}
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count_neighbours() {
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count_originators "$WLAN_MESH_INTERFACE"
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}
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scan_wlan() {
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#FIXME: if you can; is there an easier way to get the current frequency?
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#FIXME: this should reanimate the wlan driver; do passive and active scanning the job equally well?
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local FREQUENCY=$(iwlist $WLAN_MESH_INTERFACE frequency 2> /dev/null | \
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grep -o "Current Frequency=[0-9.]\+ GHz" | \
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grep -o "[0-9.]*" | \
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tr -d ".")
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[ -n "$FREQUENCY" ] && iw $WLAN_MESH_INTERFACE scan freq $FREQUENCY passive 1> /dev/null 2> /dev/null
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}
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fsm_load() {
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if [ -f "$STATEFILE" ]; then
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STATE=""
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SINCE=""
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. "$STATEFILE" || return 1
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fi
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}
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fsm_save() {
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echo -e "STATE=${STATE}\nSINCE=${SINCE}" > "$STATEFILE" || return 1
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}
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fsm_entry() {
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SINCE=$(get_time)
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case $STATE in
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pending)
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scan_wlan
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;;
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error)
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if [ -n "$DEBUG" ] && [ "$DEBUG" -eq "1" ]; then
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debug_output | gzip > ${DEBUGFILE}
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fi
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reboot
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;;
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esac
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}
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fsm_transition() {
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local AGE=-1
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[ -n "$SINCE" ] && AGE=$(( $(get_time) - $SINCE ))
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local OLDSTATE=$STATE
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case $STATE in
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working)
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if [ "$(count_neighbours)" -eq "0" ] && [ "$(count_clients)" -eq "0" ]; then
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STATE=pending
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fi
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;;
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pending)
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if [ "$AGE" -ge "$TIMEOUT_MEDIUM" ]; then
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STATE=error
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elif [ "$(count_originators)" -eq "0" ] && [ "$AGE" -ge "$TIMEOUT_SHORT" ]; then
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STATE=error
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elif [ "$(count_neighbours)" -gt "0" ] || [ "$(count_clients)" -gt "0" ]; then
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STATE=working
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fi
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;;
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*)
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if [ "$AGE" -ge "$TIMEOUT_LONG" ]; then
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STATE=error
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elif [ "$(count_neighbours)" -gt "0" ] || [ "$(count_clients)" -gt "0" ]; then
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STATE=working
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fi
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;;
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esac
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if [ ! "$OLDSTATE" = "$STATE" ]; then
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echo "$(date) '$OLDSTATE' -> '$STATE'"
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fsm_entry
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fi
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}
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# program
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fsm_load
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fsm_transition
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fsm_save
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