Is there a list of error codes for WebSocket from the Node.JS ws package?

Question

I'm writing a simple application with Node that connects to a WebSocket server and retrieve's some information on a set interval. The application needs to be able to handle the possibility of different errors arising from the WebSocket. When I attach a listener to the error event of the socket, the following is an example of the error object that the application receives:

{
  errno: -4073,
  code: 'EHOSTUNREACH',
  syscall: 'connect',
  address: '<Server's IP Address>',
  port: <Port #>
}

This is fine. I understand what all of this means. The host is unreachable (which is true, the machine it was tested on has no network connection).

My issue comes with interpreting other errors. I would like to properly handle and report on each error code, like ECONNREFUSED or ECONNRESET and log them to console with some description that makes sense. I would like to find a list of these ECONN errors so I can implement proper handling for the ones I know are most likely to occur.

I have Googled and Googled, looked at READMEs, searched for keywords with different packages, generic terms, specific terms, I even tried quoting that specific error code number -4073 and I can't find anything. I have done a global search of my node_modules for some of these keywords and can't find anything. Can someone please point me to a list of where these specific error messages can be found?

Answer 1

Those errors are defined in the Standard C library, they aren't Node's stuff.
Start here: errno(3) — Linux manual page