private string ExtractIPAddressFromXml(XmlDocument doc)
{
string ipAddress = null;
XmlNode keywordsNode = doc.SelectSingleNode("//Keywords");
string keywordsText = keywordsNode.InnerText;
if (keywordsText.StartsWith("0x"))
{
keywordsText = keywordsText.Substring(2);
}
ulong keywordsULONG = ulong.Parse(keywordsText, NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture);
if (keywordsNode != null)
{
// we must match on keywords
foreach (ExpressionsToBlockGroup group in config.GetGroupsMatchingKeywords(keywordsULONG))
{
foreach (ExpressionToBlock expression in group.Expressions)
{
// we must find a node for each xpath expression
XmlNodeList nodes = doc.SelectNodes(expression.XPath);
if (nodes.Count == 0)
{
Log.Write(LogLevel.Warning, "No nodes found for xpath {0}", expression.XPath);
ipAddress = null;
break;
}
// if there is a regex, it must match
if (string.IsNullOrWhiteSpace(expression.Regex))
{
Log.Write(LogLevel.Info, "No regex, so counting as a match");
}
else
{
bool foundMatch = false;
foreach (XmlNode node in nodes)
{
Match m = expression.RegexObject.Match(node.InnerText);
if (m.Success)
{
// check if the regex had an ipadddress group
Group ipAddressGroup = m.Groups["ipaddress"];
if (ipAddressGroup != null && ipAddressGroup.Success && !string.IsNullOrWhiteSpace(ipAddressGroup.Value))
{
string tempIPAddress = ipAddressGroup.Value.Trim();
IPAddress tmp;
if (IPAddress.TryParse(tempIPAddress, out tmp))
{
ipAddress = tempIPAddress;
foundMatch = true;
break;
}
// Check Host by name
Log.Write(LogLevel.Info, "Parsing as IP failed, checking dns '{0}'", tempIPAddress);
try
{
IPHostEntry entry = Dns.GetHostEntry(tempIPAddress);
if (entry != null && entry.AddressList != null && entry.AddressList.Length > 0)
{
ipAddress = entry.AddressList.FirstOrDefault().ToString();
foundMatch = true;
Log.Write(LogLevel.Info, "Dns result '{0}' = '{1}'", tempIPAddress, ipAddress);
break;
}
}
catch
{
Log.Write(LogLevel.Info, "Parsing as dns failed '{0}'", tempIPAddress);
}
}
else
{
foundMatch = true;
break;
}
}
}
if (!foundMatch)
{
// no match, move on to the next group to check
Log.Write(LogLevel.Warning, "Regex {0} did not match any nodes with xpath {1}", expression.Regex, expression.XPath);
ipAddress = null;
break;
}
}
}
if (ipAddress != null)
{
break;
}
}
}
return(ipAddress);
}
private string ExtractIPAddressFromXml(XmlDocument doc)
{
string ipAddress = null;
XmlNode keywordsNode = doc.SelectSingleNode("//Keywords");
string keywordsText = keywordsNode.InnerText;
if (keywordsText.StartsWith("0x"))
{
keywordsText = keywordsText.Substring(2);
}
ulong keywordsULONG = ulong.Parse(keywordsText, NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture);
if (keywordsNode != null)
{
// we must match on keywords
foreach (ExpressionsToBlockGroup group in config.GetGroupsMatchingKeywords(keywordsULONG))
{
foreach (ExpressionToBlock expression in group.Expressions)
{
// we must find a node for each xpath expression
XmlNodeList nodes = doc.SelectNodes(expression.XPath);
if (nodes.Count == 0)
{
Log.Write(LogLevel.Warning, "No nodes found for xpath {0}", expression.XPath);
ipAddress = null;
break;
}
// if there is a regex, it must match
if (string.IsNullOrWhiteSpace(expression.Regex))
{
Log.Write(LogLevel.Info, "No regex, so counting as a match");
}
else
{
bool foundMatch = false;
foreach (XmlNode node in nodes)
{
Match m = expression.RegexObject.Match(node.InnerText);
if (m.Success)
{
foundMatch = true;
// check if the regex had an ipadddress group
Group ipAddressGroup = m.Groups["ipaddress"];
if (ipAddressGroup != null && ipAddressGroup.Success && !string.IsNullOrWhiteSpace(ipAddressGroup.Value))
{
ipAddress = ipAddressGroup.Value.Trim();
}
break;
}
}
if (!foundMatch)
{
// no match, move on to the next group to check
Log.Write(LogLevel.Warning, "Regex {0} did not match any nodes with xpath {1}", expression.Regex, expression.XPath);
ipAddress = null;
break;
}
}
}
if (ipAddress != null)
{
break;
}
}
}
return(ipAddress);
}
