/// <summary>
/// Returns all the IPs associated with the provided interface, if any, in
/// textual form.
/// </summary>
/// <param name="strInterface">
/// The name of the network interface or sub-interface to query
/// (eg eth0 or eth0:0) or the string "default"
/// </param>
/// <param name="returnSubinterfaces">
/// Whether to return IPs associated with subinterfaces of
/// the given interface
/// </param>
/// <returns>
/// A string vector of all the IPs associated with the provided
/// interface. The local host IP is returned if the interface
/// name "default" is specified or there is an I/O error looking
/// for the given interface.
/// </returns>
/// <exception cref="UnknownHostException">If the given interface is invalid</exception>
public static string[] GetIPs(string strInterface, bool returnSubinterfaces)
{
if ("default".Equals(strInterface))
{
return(new string[] { cachedHostAddress });
}
NetworkInterface netIf;
try
{
netIf = NetworkInterface.GetByName(strInterface);
if (netIf == null)
{
netIf = GetSubinterface(strInterface);
}
}
catch (SocketException e)
{
Log.Warn("I/O error finding interface " + strInterface + ": " + e.Message);
return(new string[] { cachedHostAddress });
}
if (netIf == null)
{
throw new UnknownHostException("No such interface " + strInterface);
}
// NB: Using a LinkedHashSet to preserve the order for callers
// that depend on a particular element being 1st in the array.
// For example, getDefaultIP always returns the first element.
LinkedHashSet <IPAddress> allAddrs = new LinkedHashSet <IPAddress>();
Collections.AddAll(allAddrs, Collections.List(netIf.GetInetAddresses()));
if (!returnSubinterfaces)
{
allAddrs.RemoveAll(GetSubinterfaceInetAddrs(netIf));
}
string[] ips = new string[allAddrs.Count];
int i = 0;
foreach (IPAddress addr in allAddrs)
{
ips[i++] = addr.GetHostAddress();
}
return(ips);
}