#!/bin/sh /etc/rc.common
# Copyright (C) 2012 Inteno

START=98
STOP=40

wait_connection_acs() {
    i=0
    result=1
    until [ \( $result -eq 0 \) -o \( $i -eq 20 \) ];do
       echo -e -n "" | nc $1 $2
       result=$?
       if [ $result -eq 1 ];then
           i=`expr $i + 1`
           sleep 5
       fi
    done
}

check_connection_request_url() {
    cpe_port=`uci get cwmp.cpe.port`
    if [ "_$cpe_port" = "_" ];then
        cpe_port=7547
    fi
    default_acs="http://192.168.1.1:8080/openacs/acs"
    acs_dhcp_discovery=`uci -q get cwmp.acs.dhcp_discovery`
    url=`uci -q get cwmp.acs.url`
    if [ \( "_$acs_dhcp_discovery" = "_enable" \) -o \( "_$url" = "_" \) ];then
        url=`uci -P /var/state -q get provisioning.iup.tr069url`
    elif [ "_$url" != "_" ];then
        url=`uci -q get cwmp.acs.url`
    else
        url=$default_acs
    fi
    
    dest=`echo $url|sed 's/http:\/\///g'|cut -f1 -d \/|cut -f1 -d:`
    port=`echo $url|sed 's/http:\/\///g'|cut -f1 -d \/|cut -f2 -d:`
    
    if [ "_$port" = "_" ];then
        port=80
    fi

    isIP=`echo "$dest"|grep -v -e [a-zA-Z]`
    if [ "_$isIP" != "_" ];then
        list=`netstat -t -n|grep $dest:$port|sed 's/\ \+/-/g'|sed 's/-$//g'`
        wait_connection_acs "$dest" "$port"
        list2=`netstat -t -n|grep $dest:$port|sed 's/\ \+/-/g'|sed 's/-$//g'`
    else
        i=0
        result=1
        until [ \( $result -eq 0 \) -o \( $i -eq 20 \) ];do
            nslookup $dest > /dev/null
            result=$?
            if [ $result -eq 1 ];then
                i=`expr $i + 1`
                sleep 5
            fi
        done
        if [ $result -eq 1 ];then
            exit 1
        fi
        number_entries=`nslookup $dest|wc -l`
        n=`expr $number_entries - 4`
        if [ $n -lt 0 ];then
            exit 1
        fi
        for addr in `nslookup $dest|tail -$n|grep Address|cut -f2 -d:|sed 's/^ //g'|cut -f1  -d " "`;do
            list=$list`netstat -t -n|grep $addr:$port|sed 's/\ \+/-/g'|sed 's/-$//g'`
        done
        for addr in `nslookup $dest|tail -$n|grep Address|cut -f2 -d:|sed 's/^ //g'|cut -f1  -d " "`;do
            wait_connection_acs "$addr" "$port"
            list2=$list2`netstat -t -n|grep $addr:$port|sed 's/\ \+/-/g'|sed 's/-$//g'`
        done
    fi
    for line2 in $list2;do
        found=0
        for line in $list;do
            if [ "_$line" = "_$line2" ];then
                found=1
                break
            fi
        done
        if [ $found -eq 1 ];then
            continue
        fi
        ip=`echo $line2|cut -f4 -d -|cut -f1 -d:|uniq`
        break
    done
    if [ "_$ip" = "_" ];then
        exit 1
    fi
    old_cr_url=`uci get -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_url`
    if [ $? -eq 0 ];then
        cr_url="http://$ip:$cpe_port"
        if [ "_$cr_url" != "_$old_cr_url" ];then
            rm -rf /etc/cwmpd/.iccu
            uci set -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_url=$cr_url
            ubus call tr069 notify '{"parameter": "InternetGatewayDevice.ManagementServer.ConnectionRequestURL", "value": "'$cr_url'", "type": "xsd:string"}'
            if [ $? -eq 1 ];then
                uci set -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_change_state=yes
            else
                uci set -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_change_state=no
            fi
            uci commit
        fi
    else
        rm -rf /etc/cwmpd/.iccu
        uci set -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_url=http://$ip:$cpe_port
        uci set -q -P /etc/cwmpd/.iccu cwmp.cpe.iccu_change_state=no
        uci commit
    fi
}

boot() {
    check_connection_request_url
}

start() {
    check_connection_request_url
}

restart() {
    start
}