/** @const */
var NetworkFilter =
{
/**
* @param  {*} attrValue
* @return {*}
*/
filterIp: function(attrValue)
{
if (/^[\d.]+$/.test(attrValue))
{
return NetworkFilter.filterIpv4(attrValue);
}

if (/^[\da-f:]+$/i.test(attrValue))
{
return NetworkFilter.filterIpv6(attrValue);
}

return false;
},

/**
* @param  {*} attrValue
* @return {*}
*/
filterIpport: function(attrValue)
{
var m, ip;

if (m = /^\[([\da-f:]+)(\]:[1-9]\d*)$/i.exec(attrValue))
{
ip = NetworkFilter.filterIpv6(m[1]);

if (ip === false)
{
return false;
}

return '[' + ip + m[2];
}

if (m = /^([\d.]+)(:[1-9]\d*)$/.exec(attrValue))
{
ip = NetworkFilter.filterIpv4(m[1]);

if (ip === false)
{
return false;
}

return ip + m[2];
}

return false;
},

/**
* @param  {*} attrValue
* @return {*}
*/
filterIpv4: function(attrValue)
{
if (!/^\d+\.\d+\.\d+\.\d+$/.test(attrValue))
{
return false;
}

var i = 4, p = attrValue.split('.');
while (--i >= 0)
{
// NOTE: ext/filter doesn't support octal notation
if (p[i][0] === '0' || p[i] > 255)
{
return false;
}
}

return attrValue;
},

/**
* @param  {*} attrValue
* @return {*}
*/
filterIpv6: function(attrValue)
{
return /^([\da-f]{0,4}:){2,7}(?:[\da-f]{0,4}|\d+\.\d+\.\d+\.\d+)$/.test(attrValue) ? attrValue : false;
}
};