Managing connections with asyn

[Marco Filho via Tech-talk <tech-talk at aps.anl.gov>]

Hi!

I have kind of a simple question that has persisted for a long time about managing connections with asyn. For several reasons, I want my module to manage the connection and disconnection to the device.

For a minimalistic example, I created a python socket server with code copied from the internet that I append at the end of this e-mail. With an st.cmd file that has:

drvAsynIPPortConfigure("LOCALHOST", "127.0.0.1:65432", 0, 0, 0)

My python server prints:
Connected by ('127.0.0.1', 39696)

And returns the terminal once the client disconnects.
I then tried starting my asyn port with no autoconnect option:

drvAsynIPPortConfigure("LOCALHOST", "127.0.0.1:65432", 0, 1, 0)

And the python server doesn't print anything. In my module code, I passed the port name as an argument to the ADDriver constructor and tried to connect with it trough the code:

    printf("###########");
    asynUser* pAsynUser_;
    pasynOctetSyncIO->connect(name, 0, &pAsynUser_, NULL);
    pasynManager->disconnect(pAsynUser_);
    printf("###########");

But when I execute the IOC i get nothing in my python port. My ioc terminal prints:
(...)

drvAsynIPPortConfigure("LOCALHOST", "127.0.0.1:65432", 0, 1, 0)
MyDriverConfig("MYPORT", "LOCALHOST", 1000, 1000, 1, 0, 0)
###########
###########

(...)

I am still struggling with this because I clearly don't fully understand the differences between asynManager, asynUser, SyncIO, etc...
I looked at the examples in the asyn module and in ADmythen module, but they all use asyn AutoConnect (or maybe I missed something). They are good for showing how to write and read trough the code, but I wasn't able to understand how to disconnect and conenct to the port's IP.

Can someone explain what am I doing wrong?

Thanks in advance :)

--------------------------------------

Python server:

# echo-server.py

import socket

HOST = "127.0.0.1"  # Standard loopback interface address (localhost)
PORT = 65432  # Port to listen on (non-privileged ports are > 1023)

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    conn, addr = s.accept()
    with conn:
        print(f"Connected by {addr}")
        while True:
            data = "">             if not data:
                break
            conn.sendall(data)