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+63
@@ -0,0 +1,63 @@
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#!/bin/sh
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# SIM slot switcher - schedule handler
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# Called by cron, generated by /etc/init.d/ssw
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# by Konstantine Shevlakov at <shevlakov@132lan.ru> 2025
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NODE="SW SIM SCHED"
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get_vars() {
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for d in modem sim; do
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for s in gpio value; do
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eval "${d}_${s}=$(uci -q get ssw.${d}.${s} 2>/dev/null)"
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done
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done
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}
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reload_iface() {
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local iface
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iface=$(uci show network | awk -F'[.]' '/devices/{gsub("'\''",""); print $2}' | tail -1)
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[ -n "$iface" ] && ifup "$iface"
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}
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sw_sim() {
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local cur_sim next_sim
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cur_sim=$(cat /sys/class/gpio/"$sim_gpio"/value)
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case "$cur_sim" in
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0) next_sim=1 ;;
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1) next_sim=0 ;;
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*) logger -t "$NODE" "ERROR: unexpected sim gpio value: $cur_sim"; exit 1 ;;
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esac
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logger -t "$NODE" "Switching SIM: slot $cur_sim -> slot $next_sim"
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echo "0" > /sys/class/gpio/"$modem_gpio"/value
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echo "$next_sim" > /sys/class/gpio/"$sim_gpio"/value
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if [ "$modem_value" = "1" ]; then
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sleep 2
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echo "1" > /sys/class/gpio/"$modem_gpio"/value
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if [ -x /etc/init.d/smstools3 ]; then
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/etc/init.d/smstools3 restart
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fi
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fi
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sleep 5 && reload_iface &
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}
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sw_revert() {
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local cur_sim
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cur_sim=$(cat /sys/class/gpio/"$sim_gpio"/value)
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if [ "$cur_sim" != "$sim_value" ]; then
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logger -t "$NODE" "Reverting SIM to default slot $sim_value"
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sw_sim
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else
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logger -t "$NODE" "SIM already on default slot $sim_value, nothing to do"
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fi
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}
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# --- main ---
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get_vars
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case "$1" in
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revert) sw_revert ;;
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*) sw_sim ;;
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esac
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@@ -58,18 +58,6 @@ get_vars(){
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[ -n "$interval" ] || interval=60
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[ -n "$times_rsrp" ] || times_rsrp=5
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# Schedule variables
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sched_enable=$(uci -q get ssw.schedule.enable 2>/dev/null)
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sched_time_on=$(uci -q get ssw.schedule.time_on 2>/dev/null)
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sched_duration=$(uci -q get ssw.schedule.duration 2>/dev/null)
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sched_apn=$(uci -q get ssw.schedule.apn 2>/dev/null)
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sched_period=$(uci -q get ssw.schedule.period 2>/dev/null)
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sched_period_days=$(uci -q get ssw.schedule.period_days 2>/dev/null)
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sched_weekday=$(uci -q get ssw.schedule.weekday 2>/dev/null)
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[ -n "$sched_duration" ] || sched_duration=0
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[ -n "$sched_period" ] || sched_period=daily
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[ -n "$sched_period_days" ] || sched_period_days=1
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[ -n "$sched_weekday" ] || sched_weekday=1
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}
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# SIM Switch
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@@ -92,163 +80,6 @@ sw_sim(){
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set > /tmp/apn.ssw
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}
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# Revert rule switch (failover)
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sw_rule(){
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if [ -f /tmp/ssw.vars ]; then
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. /tmp/ssw.vars
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fi
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if [ "$cur_sim" -ne "$sim_value" ]; then
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if [ "$(date +%s)" -gt "$SWDATE" ]; then
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logger -t "$NODE" "Revert to default SIM slot with $apn"
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sw_sim
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fi
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fi
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}
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# Schedule: revert to default SIM after duration
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sched_revert(){
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[ -f /tmp/ssw_sched.vars ] && . /tmp/ssw_sched.vars
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if [ -n "$SCHED_REVERT_AT" ] && [ "$(date +%s)" -ge "$SCHED_REVERT_AT" ]; then
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cur_sim=$(cat /sys/class/gpio/$sim_gpio/value)
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if [ "$cur_sim" -ne "$sim_value" ]; then
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logger -t "$NODE" "Schedule: reverting to default SIM slot"
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iface=$(uci show network | awk -F [.] '/devices/{gsub("'\''","");print $2}' | tail -1)
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uci set network.$iface.apn="${apn1:-internet}"
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uci commit network
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reload_config network
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sw_sim && sleep 20 && reload_iface &
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fi
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rm -f /tmp/ssw_sched.vars
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logger -t "$NODE" "Schedule: revert done, schedule state cleared"
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fi
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}
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# Check if today matches the configured schedule period.
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# Returns 0 (true) if the switch should fire today, 1 otherwise.
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sched_day_match(){
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today=$(date +%Y%m%d)
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now_dow=$(date +%w) # 0=Sun .. 6=Sat
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case "$sched_period" in
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daily)
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return 0
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;;
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weekly)
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[ "$now_dow" = "$sched_weekday" ] && return 0
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return 1
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;;
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interval)
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# Read the date of the last successful switch from persistent state.
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# We keep it in /tmp/ssw_sched_last.date so it survives across
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# the daemon's iterations but resets on reboot (intentional —
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# after reboot the interval counter restarts from today).
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last_date=""
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[ -f /tmp/ssw_sched_last.date ] && last_date=$(cat /tmp/ssw_sched_last.date)
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if [ -z "$last_date" ]; then
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# First run ever (or after reboot): trigger today.
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return 0
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fi
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# Calculate elapsed days between last_date and today (YYYYMMDD arithmetic).
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# Use date to convert both to unix timestamps then divide.
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ts_last=$(date -d "$last_date" +%s 2>/dev/null)
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[ -z "$ts_last" ] && ts_last=$(date -jf "%Y%m%d" "$last_date" +%s 2>/dev/null)
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ts_now=$(date +%s)
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elapsed_days=$(( (ts_now - ts_last) / 86400 ))
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[ "$elapsed_days" -ge "$sched_period_days" ] && return 0
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return 1
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;;
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*)
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# Unknown period — treat as daily
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return 0
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;;
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esac
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}
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# Schedule: switch to reserve SIM at configured time
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check_schedule(){
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[ "$sched_enable" = "1" ] || return
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[ -n "$sched_time_on" ] || return
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# Handle pending revert first — takes priority over new switch logic.
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if [ -f /tmp/ssw_sched.vars ]; then
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sched_revert
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return
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fi
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# Parse HH:MM (strip leading zeros to avoid octal)
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sched_h=$(echo "$sched_time_on" | cut -d: -f1 | sed 's/^0*//')
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sched_m=$(echo "$sched_time_on" | cut -d: -f2 | sed 's/^0*//')
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[ -z "$sched_h" ] && sched_h=0
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[ -z "$sched_m" ] && sched_m=0
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now_h=$(date +%H | sed 's/^0*//')
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now_m=$(date +%M | sed 's/^0*//')
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[ -z "$now_h" ] && now_h=0
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[ -z "$now_m" ] && now_m=0
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# Check time window: [sched_time .. sched_time + ceil(interval/60)) minutes
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now_total=$(( now_h * 60 + now_m ))
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sched_total=$(( sched_h * 60 + sched_m ))
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interval_min=$(( interval / 60 + 1 ))
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diff=$(( now_total - sched_total ))
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# Not in the time window yet
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if [ "$diff" -lt 0 ] || [ "$diff" -ge "$interval_min" ]; then
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return
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fi
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# Check if the period condition is met (daily / weekly / every N days)
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sched_day_match || return
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# Check if we already fired today (prevents re-triggering within the same window)
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today=$(date +%Y%m%d)
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if [ -f /tmp/ssw_sched_fired.date ]; then
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fired=$(cat /tmp/ssw_sched_fired.date)
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[ "$fired" = "$today" ] && return
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fi
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# All conditions met — switch to reserve SIM
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cur_sim=$(cat /sys/class/gpio/$sim_gpio/value)
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if [ "$cur_sim" -ne "$sim_value" ]; then
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# Already on reserve SIM (e.g. failover active), skip but record the day.
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logger -t "$NODE" "Schedule: already on reserve SIM, skipping switch"
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echo "$today" > /tmp/ssw_sched_fired.date
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return
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fi
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logger -t "$NODE" "Schedule: switching to reserve SIM (period=$sched_period, time=$sched_time_on)"
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iface=$(uci show network | awk -F [.] '/devices/{gsub("'\''","");print $2}' | tail -1)
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apn_use="${sched_apn:-${apn2:-internet}}"
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uci set network.$iface.apn="$apn_use"
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uci commit network
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reload_config network
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sw_sim && sleep 20 && reload_iface &
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# Record fire date (suppress re-trigger within same day/window)
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echo "$today" > /tmp/ssw_sched_fired.date
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# For interval mode: record as the last successful switch date
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if [ "$sched_period" = "interval" ]; then
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echo "$today" > /tmp/ssw_sched_last.date
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fi
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# Arm the revert timer if duration > 0
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if [ "$sched_duration" -gt 0 ]; then
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revert_at=$(( $(date +%s) + sched_duration * 60 ))
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echo "SCHED_REVERT_AT=$revert_at" > /tmp/ssw_sched.vars
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logger -t "$NODE" "Schedule: will revert to default SIM in ${sched_duration} min"
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else
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logger -t "$NODE" "Schedule: no auto-revert configured"
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fi
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}
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# Check interface state via mwan3
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monitor_mwan3(){
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iface=$(uci show network | awk -F [.] '/devices/{print $2}')
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@@ -268,10 +99,10 @@ monitor_rsrp(){
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CRSRP=$(echo "$SIGNAL" | jsonfilter -e '@["modem"][*]["5g"]["rsrp"]' | awk '{printf "%.0f\n", $1}')
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fi
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if [ $CRSRP -ne 0 ]; then
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if [ -n "$CRSRP" ] && [ "$CRSRP" -ne "0" ]; then
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echo $CRSRP >> /tmp/ssw_rsrp.var
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fi
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if [ $cnt -eq $times_rsrp ]; then
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if [ "$cnt" -eq "$times_rsrp" ]; then
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RSRP=$(awk '{sum+=$1} END { printf "%.0f\n", sum/NR }' /tmp/ssw_rsrp.var)
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cat /dev/null > /tmp/ssw_rsrp.var
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if [ $RSRP -lt $rsrp ]; then
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@@ -297,9 +128,6 @@ while true; do
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get_vars
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sleep $interval
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# Schedule check runs every iteration, independently of failover
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check_schedule
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if [ "$enable" = "1" ]; then
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cur_sim=$(cat /sys/class/gpio/$sim_gpio/value)
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monitor_rsrp
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@@ -333,22 +161,8 @@ while true; do
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uci commit network
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reload_config network
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if [ "$revert" = "1" ]; then
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if [ "$cur_sim" -eq "$sim_value" ]; then
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FBT=${FBT:=$((($interval+$times_rsrp)*2))}
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FBT=$(($FBT*2))
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SWDATE=$((`date +%s`+$FBT))
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echo "FBT=$FBT" > /tmp/ssw.vars
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echo SWDATE=$SWDATE >> /tmp/ssw.vars
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logger -t "$NODE" "Back to default SIM-slot after $(date -d @${SWDATE})"
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fi
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fi
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sw_sim && sleep 20 && reload_iface &
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fi
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if [ "$revert" = "1" ]; then
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sw_rule && sleep 20 && reload_iface &
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fi
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cnt=0
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else
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cnt=$(($cnt+1))
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