1 files changed, 144 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/Networking/IPNetwork/IPNetworkCollection.cs b/Emby.Server.Implementations/Networking/IPNetwork/IPNetworkCollection.cs
new file mode 100644
index 000000000..35cff88dc
--- /dev/null
+++ b/Emby.Server.Implementations/Networking/IPNetwork/IPNetworkCollection.cs
@@ -0,0 +1,144 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Numerics;
+
+namespace System.Net
+{
+    public class IPNetworkCollection : IEnumerable<IPNetwork>, IEnumerator<IPNetwork>
+    {
+
+        private BigInteger _enumerator;
+        private byte _cidrSubnet;
+        private IPNetwork _ipnetwork;
+
+        private byte _cidr
+        {
+            get { return this._ipnetwork.Cidr; }
+        }
+        private BigInteger _broadcast
+        {
+            get { return IPNetwork.ToBigInteger(this._ipnetwork.Broadcast); }
+        }
+        private BigInteger _lastUsable
+        {
+            get { return IPNetwork.ToBigInteger(this._ipnetwork.LastUsable); }
+        }
+        private BigInteger _network
+        {
+            get { return IPNetwork.ToBigInteger(this._ipnetwork.Network); }
+        }
+#if TRAVISCI
+        public
+#else
+        internal
+#endif
+        IPNetworkCollection(IPNetwork ipnetwork, byte cidrSubnet)
+        {
+
+            int maxCidr = ipnetwork.AddressFamily == Sockets.AddressFamily.InterNetwork ? 32 : 128;
+            if (cidrSubnet > maxCidr)
+            {
+                throw new ArgumentOutOfRangeException("cidrSubnet");
+            }
+
+            if (cidrSubnet < ipnetwork.Cidr)
+            {
+                throw new ArgumentException("cidr");
+            }
+
+            this._cidrSubnet = cidrSubnet;
+            this._ipnetwork = ipnetwork;
+            this._enumerator = -1;
+        }
+
+        #region Count, Array, Enumerator
+
+        public BigInteger Count
+        {
+            get
+            {
+                BigInteger count = BigInteger.Pow(2, this._cidrSubnet - this._cidr);
+                return count;
+            }
+        }
+
+        public IPNetwork this[BigInteger i]
+        {
+            get
+            {
+                if (i >= this.Count)
+                {
+                    throw new ArgumentOutOfRangeException("i");
+                }
+
+                BigInteger last = this._ipnetwork.AddressFamily == Sockets.AddressFamily.InterNetworkV6
+                    ? this._lastUsable : this._broadcast;
+                BigInteger increment = (last - this._network) / this.Count;
+                BigInteger uintNetwork = this._network + ((increment + 1) * i);
+                IPNetwork ipn = new IPNetwork(uintNetwork, this._ipnetwork.AddressFamily, this._cidrSubnet);
+                return ipn;
+            }
+        }
+
+        #endregion
+
+        #region IEnumerable Members
+
+        IEnumerator<IPNetwork> IEnumerable<IPNetwork>.GetEnumerator()
+        {
+            return this;
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return this;
+        }
+
+        #region IEnumerator<IPNetwork> Members
+
+        public IPNetwork Current
+        {
+            get { return this[this._enumerator]; }
+        }
+
+        #endregion
+
+        #region IDisposable Members
+
+        public void Dispose()
+        {
+            // nothing to dispose
+            return;
+        }
+
+        #endregion
+
+        #region IEnumerator Members
+
+        object IEnumerator.Current
+        {
+            get { return this.Current; }
+        }
+
+        public bool MoveNext()
+        {
+            this._enumerator++;
+            if (this._enumerator >= this.Count)
+            {
+                return false;
+            }
+            return true;
+
+        }
+
+        public void Reset()
+        {
+            this._enumerator = -1;
+        }
+
+        #endregion
+
+        #endregion
+
+    }
+}
+\ No newline at end of file