how to send customized messages

[ZJLi2013]

i modified the test.c:

int onopen(wsclient *c, char* msg) {
	fprintf(stderr, "onopen called: %d\n", c->sockfd);
	libwsclient_send(c,  msg);
	return 0;
}

and modified wsclient.c with :

void libwsclient_onopen(wsclient *client, int (*cb)(wsclient *c, char* ), char* msg) {
	pthread_mutex_lock(&client->lock);
	client->onopen = cb(client, msg);
	pthread_mutex_unlock(&client->lock);
}

after a few changes and rebuilt, I tested it, but the client always give:

Unhandled control frame received.  Opcode: 9

and the server bother:

"lib/python3.7/site-packages/websockets/protocol.py", line 803, in ensure_open
    raise self.connection_closed_exc()
websockets.exceptions.ConnectionClosedError: code = 1006 (connection closed abnormally [internal]), no reason

what's the correct way to send customized message ?

[ZJLi2013]

I checked the code a little more, onopen() is actually called inside handshake thread, which is not legacy to pass another char* message. but neither there is a global alive status variable to tell the client-server channel is alive, so if I directly call libwsclient_send(), it also has issues.

[PixMod]

Try call libwsclient_send() in another thread. onopen() is in handshake thread may not suitable for sending data.

[ZJLi2013]

Try call libwsclient_send() in another thread. onopen() is in handshake thread may not suitable for sending data.

thanks, but I still think there is lack of a connection_status variable to know the channel is opened

[PixMod]

Try call libwsclient_send() in another thread. onopen() is in handshake thread may not suitable for sending data.

thanks, but I still think there is lack of a connection_status variable to know the channel is opened

After you received onclose, the websocket client instance already has been freed in end of wsclient_run_thread() thus you cannot call it's interfaces anymore.
You can keepconnection_status in your own project variable when received onopen/onclose/onerror. Ref https://github.com/morrowind/libwsclient/blob/f576ee470eeed668e7a18cbc664fe415b5fe85d1/test/test.c#L83