using System;
using System.Collections.ObjectModel;
using System.Net;
namespace MediaBrowser.Common.Net
{
///
/// Defines the .
///
public static class NetworkExtensions
{
///
/// Add an address to the collection.
///
/// The .
/// Item to add.
public static void AddItem(this Collection source, IPAddress ip)
{
if (!source.ContainsAddress(ip))
{
source.Add(new IPNetAddress(ip, 32));
}
}
///
/// Adds a network to the collection.
///
/// The .
/// Item to add.
/// If true the values are treated as subnets.
/// If false items are addresses.
public static void AddItem(this Collection source, IPObject item, bool itemsAreNetworks = true)
{
if (!source.ContainsAddress(item) || !itemsAreNetworks)
{
source.Add(item);
}
}
///
/// Converts this object to a string.
///
/// The .
/// Returns a string representation of this object.
public static string AsString(this Collection source)
{
return $"[{string.Join(',', source)}]";
}
///
/// Returns true if the collection contains an item with the ip address,
/// or the ip address falls within any of the collection's network ranges.
///
/// The .
/// The item to look for.
/// True if the collection contains the item.
public static bool ContainsAddress(this Collection source, IPAddress item)
{
if (source.Count == 0)
{
return false;
}
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (item.IsIPv4MappedToIPv6)
{
item = item.MapToIPv4();
}
foreach (var i in source)
{
if (i.Contains(item))
{
return true;
}
}
return false;
}
///
/// Returns true if the collection contains an item with the ip address,
/// or the ip address falls within any of the collection's network ranges.
///
/// The .
/// The item to look for.
/// True if the collection contains the item.
public static bool ContainsAddress(this Collection source, IPObject item)
{
if (source.Count == 0)
{
return false;
}
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
foreach (var i in source)
{
if (i.Contains(item))
{
return true;
}
}
return false;
}
///
/// Compares two Collection{IPObject} objects. The order is ignored.
///
/// The .
/// Item to compare to.
/// True if both are equal.
public static bool Compare(this Collection source, Collection dest)
{
if (dest == null || source.Count != dest.Count)
{
return false;
}
foreach (var sourceItem in source)
{
bool found = false;
foreach (var destItem in dest)
{
if (sourceItem.Equals(destItem))
{
found = true;
break;
}
}
if (!found)
{
return false;
}
}
return true;
}
///
/// Returns a collection containing the subnets of this collection given.
///
/// The .
/// Collection{IPObject} object containing the subnets.
public static Collection AsNetworks(this Collection source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
Collection res = new Collection();
foreach (IPObject i in source)
{
if (i is IPNetAddress nw)
{
// Add the subnet calculated from the interface address/mask.
var na = nw.NetworkAddress;
na.Tag = i.Tag;
res.AddItem(na);
}
else if (i is IPHost ipHost)
{
// Flatten out IPHost and add all its ip addresses.
foreach (var addr in ipHost.GetAddresses())
{
IPNetAddress host = new IPNetAddress(addr)
{
Tag = i.Tag
};
res.AddItem(host);
}
}
}
return res;
}
///
/// Excludes all the items from this list that are found in excludeList.
///
/// The .
/// Items to exclude.
/// Collection is a network collection.
/// A new collection, with the items excluded.
public static Collection Exclude(this Collection source, Collection excludeList, bool isNetwork)
{
if (source.Count == 0 || excludeList == null)
{
return new Collection(source);
}
Collection results = new Collection();
bool found;
foreach (var outer in source)
{
found = false;
foreach (var inner in excludeList)
{
if (outer.Equals(inner))
{
found = true;
break;
}
}
if (!found)
{
results.AddItem(outer, isNetwork);
}
}
return results;
}
///
/// Returns all items that co-exist in this object and target.
///
/// The .
/// Collection to compare with.
/// A collection containing all the matches.
public static Collection ThatAreContainedInNetworks(this Collection source, Collection target)
{
if (source.Count == 0)
{
return new Collection();
}
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
Collection nc = new Collection();
foreach (IPObject i in source)
{
if (target.ContainsAddress(i))
{
nc.AddItem(i);
}
}
return nc;
}
}
}