Add GetSocketFromGroup.

Source/Engine/Platform/Base/NetworkBase.cpp

@@ -77,6 +77,11 @@ int32 NetworkBase::AddSocketToGroup(NetworkSocketGroup& group, NetworkSocket& so
     return -1;
 }
 
+bool NetworkBase::GetSocketFromGroup(NetworkSocketGroup& group, uint32 index, NetworkSocket* socket)
+{
+    return true;
+}
+
 void NetworkBase::ClearGroup(NetworkSocketGroup& group)
 {
     group.Count = 0;

Source/Engine/Platform/Base/NetworkBase.h

@@ -227,6 +227,16 @@ public:
     /// <returns>Returns the socket index in group or -1 on error.</returns>
     static int32 AddSocketToGroup(NetworkSocketGroup& group, NetworkSocket& socket);
 
+    /// <summary>
+    /// Gets a socket by index.
+    /// Some data like socket IPVersion might be undefined.
+    /// </summary>
+    /// <param name="group">The group.</param>
+    /// <param name="index">The index.</param>
+    /// <param name="socket">The returned socket.</param>
+    /// <returns>Returns true on error, otherwise false.</returns>
+    static bool GetSocketFromGroup(NetworkSocketGroup& group, uint32 index, NetworkSocket* socket);
+    
     /// <summary>
     /// Clears the socket group.
     /// </summary>

Source/Engine/Platform/Win32/Win32Network.cpp

@@ -359,6 +359,24 @@ int32 Win32Network::AddSocketToGroup(NetworkSocketGroup& group, NetworkSocket& s
     return group.Count - 1;
 }
 
+bool Win32Network::GetSocketFromGroup(NetworkSocketGroup& group, uint32 index, NetworkSocket* socket)
+{
+    if (index >= SOCKGROUP_MAXCOUNT)
+        return true;
+    SOCKET s = ((pollfd*)&group.Data[index * SOCKGROUP_ITEMSIZE])->fd;
+    memcpy(socket->Data, &s, sizeof s);
+    int32 value;
+    if (GetSocketOption(*socket, NetworkSocketOption::Type, &value))
+        return true;
+    if (value == SOCK_DGRAM)
+        socket->Protocol = NetworkProtocol::Udp;
+    else if (value == SOCK_STREAM)
+        socket->Protocol = NetworkProtocol::Tcp;
+    else
+        socket->Protocol = NetworkProtocol::Undefined;
+    return false;
+}
+
 void Win32Network::ClearGroup(NetworkSocketGroup& group)
 {
     group.Count = 0;

Source/Engine/Platform/Win32/Win32Network.h

@@ -28,6 +28,7 @@ public:
     static int32 Poll(NetworkSocketGroup& group);
     static bool GetSocketState(NetworkSocketGroup& group, uint32 index, NetworkSocketState& state);
     static int32 AddSocketToGroup(NetworkSocketGroup& group, NetworkSocket& socket);
+    static bool GetSocketFromGroup(NetworkSocketGroup& group, uint32 index, NetworkSocket* socket);
     static void ClearGroup(NetworkSocketGroup& group);
     static int32 WriteSocket(NetworkSocket socket, byte* data, uint32 length, NetworkEndPoint* endPoint = nullptr);
     static int32 ReadSocket(NetworkSocket socket, byte* buffer, uint32 bufferSize, NetworkEndPoint* endPoint = nullptr);