Question about usage Server

[franklupo]

Hi,
First I wanted to thank you for your great work for this great library.

• how can I access only from some ip of my network card?
• how can I view only some items depending on the login (username, password)?
• according to your experience, how is it better to save the data in memori and storage?

best regards

[nauful]

Hello,

Glad you like my library.

IP binding

I don't expose this by default but you can promote IPEndPoint to a parameter for this function:

LibUA/NET Core/LibUA/Server.cs

Line 60 in c8e642d

IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, Port);

Then you can pass in an ip to bind to here:

LibUA/NET Core/TestServer/Program.cs

Line 590 in c8e642d

server.Start();

For user-level permissions,

Create a session object (any type of your design) and return a new instance here: https://github.com/nauful/LibUA/blob/c8e642d10b1f39543bc1487c8e0fa496ef743b17/NET%20Core/TestServer/Program.cs#L105C41-L105C61
E.g. session.state == Unassigned now
When the client sends a username + password, assign it to your session object here:

LibUA/NET Core/TestServer/Program.cs

Line 138 in c8e642d

return true;

E.g. session.state == Logged in, session.username == username now
Implement this in your Application: https://github.com/nauful/LibUA/blob/c8e642d10b1f39543bc1487c8e0fa496ef743b17/NET%20Core/LibUA/Application.cs#L633
Now you can check if session[Logged in, username] has permission to access any particular NodeId.

Storage

For memory I use a Dictionary<NodeId, MyDataTypes>.
For storage you can use a normal database (sqlite, MySql, etc) or any time-series database (my original use case when I started this library). You can write to Dictionary and db when receiving a ua write, read from dictionary or read from db and cache in dictionary.

[franklupo]

Hi,

IP binding

https://github.com/nauful/LibUA/blob/c8e642d10b1f39543bc1487c8e0fa496ef743b17/NET%20Core/LibUA/Server.cs#L35C11-L35C17it would be nice to pass endpoint to constructor

For user-level permissions,

https://github.com/nauful/LibUA/blob/c8e642d10b1f39543bc1487c8e0fa496ef743b17/NET%20Core/LibUA/Application.cs#L633
the SessionHasPermissionToRead is not virtual, ovveride is not possible

best regards

[nauful]

Done both, please try now.

[nauful]

Closed, finished work.