luci-app-adguardhome/root/etc/init.d/AdGuardHome

#!/bin/sh /etc/rc.common
 
USE_PROCD=1
 
START=95
STOP=01

CONFIGURATION=AdGuardHome
EXTRA_COMMANDS="do_redirect"
EXTRA_HELP="        do_redirect 0 or 1"
set_forward_dnsmasq()
{
	local PORT="$1"
	addr="127.0.0.1#$PORT"
	OLD_SERVER="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
	echo $OLD_SERVER | grep "^$addr" >/dev/null 2>&1
	if [ $? -eq 0 ]; then
		return
	fi
	uci delete dhcp.@dnsmasq[0].server 2>/dev/null
	uci add_list dhcp.@dnsmasq[0].server=$addr
	for server in $OLD_SERVER; do
		if [ "$server" = "$addr" ]; then
			continue
		fi
		uci add_list dhcp.@dnsmasq[0].server=$server
	done
	uci delete dhcp.@dnsmasq[0].resolvfile 2>/dev/null
	uci set dhcp.@dnsmasq[0].noresolv=1
	uci commit dhcp 
	/etc/init.d/dnsmasq restart
}

stop_forward_dnsmasq()
{
	local OLD_PORT="$1"
	addr="127.0.0.1#$OLD_PORT"
	OLD_SERVER="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
	echo $OLD_SERVER | grep "^$addr" >/dev/null 2>&1
	if [ $? -ne 0 ]; then
		return
	fi

	uci del_list dhcp.@dnsmasq[0].server=$addr 2>/dev/null
	addrlist="`uci get dhcp.@dnsmasq[0].server 2>/dev/null`"
	if [ -z "$addrlist" ] ; then
		uci set dhcp.@dnsmasq[0].resolvfile=/tmp/resolv.conf.auto 2>/dev/null
		uci delete dhcp.@dnsmasq[0].noresolv 2>/dev/null
	fi
	uci commit dhcp
	/etc/init.d/dnsmasq restart
}

set_iptable()
{
	local ipv6_server=$1
	local tcp_server=$2

	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}'`"
	for IP in $IPS
	do
		if [ "$tcp_server" == "1" ]; then
			iptables -t nat -A PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $AdGuardHome_PORT >/dev/null 2>&1
		fi
		iptables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $AdGuardHome_PORT >/dev/null 2>&1
	done

	if [ "$ipv6_server" == 0 ]; then
		return
	fi

	IPS="`ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}'`"
	for IP in $IPS
	do
		if [ "$tcp_server" == "1" ]; then
			ip6tables -t nat -A PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $AdGuardHome_PORT >/dev/null 2>&1
		fi
		ip6tables -t nat -A PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $AdGuardHome_PORT >/dev/null 2>&1
	done

}

clear_iptable()
{
	local OLD_PORT="$1"
	local ipv6_server=$2
	IPS="`ifconfig | grep "inet addr" | grep -v ":127" | grep "Bcast" | awk '{print $2}' | awk -F : '{print $2}'`"
	for IP in $IPS
	do
		iptables -t nat -D PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
		iptables -t nat -D PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
	done

	if [ "$ipv6_server" == 0 ]; then
		return
	fi
	echo "warn ip6tables nat mod is needed"
	IPS="`ifconfig | grep "inet6 addr" | grep -v " fe80::" | grep -v " ::1" | grep "Global" | awk '{print $3}'`"
	for IP in $IPS
	do
		ip6tables -t nat -D PREROUTING -p udp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
		ip6tables -t nat -D PREROUTING -p tcp -d $IP --dport 53 -j REDIRECT --to-ports $OLD_PORT >/dev/null 2>&1
	done
	
}

service_triggers() {
	procd_add_reload_trigger firewall
	procd_add_reload_trigger "$CONFIGURATION"
}

get_tz()
{
	SET_TZ=""

	if [ -e "/etc/localtime" ]; then
		return 
	fi
	
	for tzfile in /etc/TZ /var/etc/TZ
	do
		if [ ! -e "$tzfile" ]; then
			continue
		fi
		
		tz="`cat $tzfile 2>/dev/null`"
	done
	
	if [ -z "$tz" ]; then
		return  
	fi
	
	SET_TZ=$tz
}

rm_port53()
{
	AdGuardHome_PORT=$(awk '/  port:/{printf($2)}' $configpath)
	dnsmasq_port=$(uci get dhcp.@dnsmasq[0].port 2>/dev/null)
	if [ -z "$dnsmasq_port" ]; then
	dnsmasq_port="53"
	fi
	if [ "$dnsmasq_port" == "$AdGuardHome_PORT" ]; then
		if [ "$dnsmasq_port" == "53" ]; then
			dnsmasq_port="1745"
		fi
	elif [ "$dnsmasq_port" == "53" ]; then
		return
	fi
	config_editor "dns.port" "$dnsmasq_port" "$configpath"
	uci set dhcp.@dnsmasq[0].port="53"
	uci commit dhcp
	/etc/init.d/dnsmasq reload
}

use_port53()
{
	AdGuardHome_PORT=$(awk '/  port:/{printf($2)}' $configpath)
	dnsmasq_port=$(uci get dhcp.@dnsmasq[0].port 2>/dev/null)
	if [ -z "$dnsmasq_port" ]; then
		dnsmasq_port="53"
	fi
	if [ "$dnsmasq_port" == "$AdGuardHome_PORT" ]; then
		if [ "$dnsmasq_port" == "53" ]; then
			AdGuardHome_PORT="1745"
		fi
	elif [ "$AdGuardHome_PORT" == "53" ]; then
		return
	fi
	config_editor "dns.port" "53" "$configpath"
	uci set dhcp.@dnsmasq[0].port="$AdGuardHome_PORT"
	uci commit dhcp
	/etc/init.d/dnsmasq reload
}

do_redirect() 
{
	config_load "${CONFIGURATION}"
	local section="$CONFIGURATION"
	args=""
	ipv6_server=1
	tcp_server=0
	enabled=$1
	config_get configpath $CONFIGURATION configpath "/etc/AdGuardHome.yaml"
	AdGuardHome_PORT=$(awk '/  port:/{printf($2)}' $configpath)
	if [ -z "$AdGuardHome_PORT" ]; then
		AdGuardHome_PORT="0"
	fi
	config_get "redirect" "$section" "redirect" "none"
	config_get "old_redirect" "$section" "old_redirect" "none"
	config_get "old_port" "$section" "old_port" "0"
	config_get "old_enabled" "$section" "old_enabled" "0"
	if [ "$old_enabled" = "1" -a "$old_redirect" == "exchange" ]; then
		AdGuardHome_PORT=$(uci get dhcp.@dnsmasq[0].port 2>/dev/null)
	fi
	
	if [ "$old_redirect" != "$redirect" ] || [ "$old_port" != "$AdGuardHome_PORT" ] || [ "$old_enabled" = "1" -a "$enabled" = "0" ]; then
		if [ "$old_redirect" != "none" ]; then
			if [  "$old_redirect" == "redirect" -a "$old_port" != "0" ]; then
				clear_iptable "$old_port" "$ipv6_server"
			elif [ "$old_redirect" == "dnsmasq-upstream" ]; then
				stop_forward_dnsmasq "$old_port"
			elif [ "$old_redirect" == "exchange" ]; then
				rm_port53
			fi
		fi
	elif [ "$old_enabled" = "1" -a "$enabled" = "1" ]; then
		if [  "$old_redirect" == "redirect" -a "$old_port" != "0" ]; then
			clear_iptable "$old_port" "$ipv6_server"
		fi
	fi
	uci delete AdGuardHome.@AdGuardHome[0].old_redirect 2>/dev/null
	uci delete AdGuardHome.@AdGuardHome[0].old_port 2>/dev/null
	uci delete AdGuardHome.@AdGuardHome[0].old_enabled 2>/dev/null
	uci add_list AdGuardHome.@AdGuardHome[0].old_redirect="$redirect" 2>/dev/null
	uci add_list AdGuardHome.@AdGuardHome[0].old_port="$AdGuardHome_PORT" 2>/dev/null
	uci add_list AdGuardHome.@AdGuardHome[0].old_enabled="$enabled" 2>/dev/null
	uci commit AdGuardHome

	[ "$enabled" -gt 0 ] || return 1
	if [ "$AdGuardHome_PORT" == "0" ]; then
		return 1
	fi
	if [ "$redirect" = "redirect" ]; then
		set_iptable $ipv6_server $tcp_server
	elif [ "$redirect" = "dnsmasq-upstream" ]; then
		set_forward_dnsmasq "$AdGuardHome_PORT"
	elif [ "$redirect" == "exchange" -a "$(uci get dhcp.@dnsmasq[0].port 2>/dev/null)" == "53" ]; then
		use_port53
	fi
}
get_filesystem()
{
# print out path filesystem
    echo $1 | awk '
    BEGIN{
    while (("mount"| getline ret) > 0)
    {
    split(ret,d);
    fs[d[3]]=d[5];
    m=index(d[1],":")
    if (m==0)
    {
        pt[d[3]]=d[1]
    }else{
        pt[d[3]]=substr(d[1],m+1)
    }}}{
    split($0,d,"/");
    if ("/" in fs)
    { 
    result1=fs["/"];
    }
    if ("/" in pt)
    { 
    result2=pt["/"];
    }
    for (i=2;i<=length(d);i++)
    {
       p[i]=p[i-1]"/"d[i];
       if (p[i] in fs)
        { 
        result1=fs[p[i]];
        result2=pt[p[i]];
        }
    }
    if (result2 in fs){
        result=fs[result2]}
    else{
        result=result1}
    print(result);}'
}

config_editor()
{
	awk -v yaml="$1" -v value="$2" -v file="$3" '
	BEGIN{split(yaml,part,"\.");s="";i=1;l=length(part);}
    {
        if (match($0,s""part[i]))
        {
            if (i==l)
            {
                split($0,t,":");
                system("sed -i '\''"FNR"c \\"t[1]": "value"'\'' "file);
                exit;
            }
            s=s"[- ]{2}";
            i++;
        }
    }' $3
}

start_service() {
	# Reading config
	config_load "${CONFIGURATION}"
	config_get hashpass $CONFIGURATION hashpass ""
	if [ ! -z "$hashpass" ]; then
		config_editor "users.password" "$hashpass" "$configpath"
		uci set $CONFIGURATION.$CONFIGURATION.hashpass=""
	fi
	local enabled
	config_get_bool enabled $CONFIGURATION enabled 0
	
	if [ "$enabled" == "1" ]; then
	local ADDITIONAL_ARGS=""
	config_get configpath $CONFIGURATION configpath "/etc/AdGuardHome.yaml"
	config_get binpath $CONFIGURATION binpath "/usr/bin/AdGuardHome/AdGuardHome"
	
	echo -e "$configpath\n$binpath">/lib/upgrade/keep.d/luci-app-adguardhome
	mkdir -p ${binpath%/*}
	ADDITIONAL_ARGS="$ADDITIONAL_ARGS -c $configpath"
	
	config_get httpport $CONFIGURATION httpport 3000
	ADDITIONAL_ARGS="$ADDITIONAL_ARGS -p $httpport"
	
	config_get workdir $CONFIGURATION workdir "/usr/bin/AdGuardHome"
	ADDITIONAL_ARGS="$ADDITIONAL_ARGS -w $workdir"
	mkdir -p $workdir/data
	echo -e "$configpath\n$binpath">/lib/upgrade/keep.d/luci-app-adguardhome
	# hack to save config file when upgrade system
	config_get keepdb $CONFIGURATION keepdb 0
	if [ "$keepdb" -eq 1 ]; then
		echo -e "$workdir/data/sessions.db\n$workdir/data/stats.db\n$workdir/data/querylog.json">>/lib/upgrade/keep.d/luci-app-adguardhome
	fi
	config_get logfile $CONFIGURATION logfile ""
	if [ ! -z "$logfile" ]; then
		ADDITIONAL_ARGS="$ADDITIONAL_ARGS -l $logfile"
	fi
	
	if [ ! -f "$binpath" ]; then
		do_redirect 0
		rm /var/run/update_core_error 2>/dev/null
		touch /var/run/update_core
		sh /usr/share/AdGuardHome/update_core.sh 2>&1 >/tmp/AdGuardHome_update.log || touch /var/run/update_core_error
		rm /var/run/update_core
		exit 0
	fi 

	config_get_bool verbose $CONFIGURATION verbose 0
	if [ "$verbose" -eq 1 ]; then
		ADDITIONAL_ARGS="$ADDITIONAL_ARGS -v"
	fi
	
	# for overlay data-stk-oo not suppport
	local cwdfs=$(get_filesystem $workdir)
	echo "workdir is a $cwdfs filesystem"
	if [ "$cwdfs" == "jffs2" ]; then
		echo "fs error ln db to tmp $workdir $cwdfs"
		logger "AdGuardHome" "warning db redirect to tmp"
		touch $workdir/data/stats.db
		if [ ! -L $workdir/data/stats.db ]; then
		mv -f $workdir/data/stats.db /tmp/stats.db
		ln -s /tmp/stats.db $workdir/data/stats.db
		fi
		touch $workdir/data/sessions.db
		if [ ! -L $workdir/data/sessions.db ]; then
		mv -f $workdir/data/sessions.db /tmp/sessions.db
		ln -s /tmp/sessions.db $workdir/data/sessions.db
		fi
	fi
	procd_open_instance
	get_tz
	if [ ! -z "$SET_TZ" ]; then 
		procd_set_param env TZ="$SET_TZ" 
	fi
	procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
	procd_set_param limits core="unlimited"
	procd_set_param stderr 1 
	# pass config to script on start
	procd_set_param command $binpath $ADDITIONAL_ARGS
	procd_set_param file "$configpath"
	procd_set_param file "/etc/config/AdGuardHome"
	procd_close_instance
	if [ -f "$configpath" ]; then
		do_redirect 1
	else
		do_redirect 0
		config_get "redirect" "AdGuardHome" "redirect" "none"
		if [ "$redirect" != "none" ]; then
			procd_open_instance "waitconfig"
			procd_set_param command "/usr/share/AdGuardHome/watchconfig.sh"
			procd_close_instance
		fi
	fi
	echo "AdGuardHome turn on"
	(sleep 10 && [ -z "$(pgrep $binpath)" ] && do_redirect 0 )&
	fi
}
reload_service()
{
	config_load "${CONFIGURATION}"
	echo "AdGuardHome reloading"
	config_get_bool enabled $CONFIGURATION enabled 0
	procd_send_signal $CONFIGURATION
	if [ "$enabled" == "0" ]; then
		do_redirect 0
	fi
	start
	echo "enabled=$enabled"
}
stop_service()
{
	config_load "${CONFIGURATION}"
	do_redirect 0
	procd_send_signal $CONFIGURATION
	echo "AdGuardHome turn off"
	echo "enabled=$enabled"
}