[jira] Commented: (LOG4NET-112) Add support to the UdpAppender for IP v6 remote addresses

["Marc Borgers (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4NET-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920149#action_12920149 ] 

Marc Borgers commented on LOG4NET-112:
--------------------------------------

The problem is located in a the routine that does the conversion from hostname to the ipaddress in IPAddressConverter TryParse does not work.

Here is what I did and what seems to work.  I replaced the callback with my own to work around the proble:

		public object ConvertFrom(object source) 
		{
			string str = source as string;
			if (str != null && str.Length > 0) 
			{
				try
				{
					// It seems that TryParse, used in the Log4Net code does not work
					if (str.Trim(validIpAddressChars).Length == 0)
					{
						try
						{
							// try to parse the string as an IP address
							return IPAddress.Parse(str);
						}
						catch(FormatException)
						{
							// Ignore a FormatException, try to resolve via DNS
						}
					}

					// Try to resolve via DNS. This is a blocking call.
					IPHostEntry host = Dns.GetHostByName(str);
					if (host != null && 
						host.AddressList != null && 
						host.AddressList.Length > 0 &&
						host.AddressList[0] != null)
					{
						return host.AddressList[0];
					}
				}
				catch(Exception ex)
				{
					throw ConversionNotSupportedException.Create(typeof(IPAddress), source, ex);
				}
			}
			throw ConversionNotSupportedException.Create(typeof(IPAddress), source);
		}


> Add support to the UdpAppender for IP v6 remote addresses
> ---------------------------------------------------------
>
>                 Key: LOG4NET-112
>                 URL: https://issues.apache.org/jira/browse/LOG4NET-112
>             Project: Log4net
>          Issue Type: Improvement
>          Components: Appenders
>    Affects Versions: 1.2.10
>            Reporter: Nicko Cadell
>            Assignee: Nicko Cadell
>            Priority: Minor
>             Fix For: 1.2.11
>
>
> The UdpClient object must be configured for either IP v4 or IP v6 when it is created. Once configured it cannot be used to send to remote addresses that are from a different network family.
> Specifying the network family is not supported on NET 1.0, NETCF 1.0, SSCLI 1.0

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