#!/bin/sh
# Copyright (C) 2015 PIVA Software <www.pivasoftware.com>
# 	Author: IMEN Bhiri <imen.bhiri@pivasoftware.com>


UCI_CONFIG_DIR="/etc/config/"
UCI_GET_VARSTATE="/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} -P /var/state get -q "
UCI_SET_VARSTATE="/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} -P /var/state set -q "
CAPTURE_FILE="/tmp/download_dump"
DOWNLOAD_DIAGNOSTIC_FILE="/tmp/icwmp_download_diagnostic"

download_launch() {
	url=$1
	interface=$2
	tcpdump -i $interface tcp -w ${CAPTURE_FILE} > /dev/null 2>&1 &
	PID=$!
	sleep 1
	if [ ${url:0:7} = http:// -o ${url:0:6} = ftp:// ]; then
		res=$(wget -O ${DOWNLOAD_DIAGNOSTIC_FILE} $url 2>&1)
		ba=`echo "$res" | grep "bad address"`
		[ -n "$ba" ] && { $UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=Error_InitConnectionFailed; kill $PID 2> /dev/null; return; }
		stc=`echo "$res" | grep "404 Not Found"`
		[ -n "$stc" ] && { $UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=Error_NoResponse; kill $PID 2> /dev/null; return; }
		stc=`echo "$res" | grep "100%"`
		[ -z "$stc" ] && { $UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=Error_TransferFailed; kill $PID 2> /dev/null; return; }
	fi
	$UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=Completed
	rm ${DOWNLOAD_DIAGNOSTIC_FILE} 2>/dev/null
	sleep 1
	local pids=`ps | grep $PID`
	kill $PID &>/dev/null
}

download_stop_diagnostic() {
	local pids=`ps | grep download_launch.*run | grep -v grep | awk '{print $1}'`
	if [ -n "$pids" ]; then
		kill -9 $pids &>/dev/null
		$UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=None
	fi
	local pids=`ps | grep upload_launch.*run | grep -v grep | awk '{print $1}'`                               
    if [ -n "$pids" ]; then
    	kids=$(grep -l "PPid.*$pids" /proc/*/task/*/status | grep -o "[0-9]*")                    
		for kid in $kids; do                                                  
	    	kill -9 $kid &>/dev/null                                                   
	    done
	    kill -9 $pids &>/dev/null                                                               
	    $UCI_SET_VARSTATE cwmp.@downloaddiagnostic[0].DiagnosticState=None      
    fi 
}

if [ "$1" == "run" ] ; then
	download_launch $2 $3 
elif [ "$1" == "stop" ]; then
	download_stop_diagnostic
else
	return
fi