C websocket library, libwebsockets - c

Question

I am looking through C websocket library libwebsockets client side example.
But i don't understand what the example purpose is.
Here is the example, this example have two connection (in the code wsi_dumb and wsi_mirror)which are same i think, and i don't know what second connection's purpose is.
using first conenction(in the code wsi_dumb), it seems to wait a request from server with libwebsocket_service() and then ...what with second connection(in the code wsi_mirror)?
And below is the part of the code i am saying.
wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
"/", argv[optind], argv[optind],
protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
/*
* sit there servicing the websocket context to handle incoming
* packets, and drawing random circles on the mirror protocol websocket
*/
n = 0;
while (n >= 0 && !was_closed) {
n = libwebsocket_service(context, 1000);
if (wsi_mirror == NULL) {
/* create a client websocket using mirror protocol */
wsi_mirror = libwebsocket_client_connect(context, address, port,
use_ssl, "/", argv[optind], argv[optind],
protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
mirror_lifetime = 10 + (random() & 1023);
fprintf(stderr, "opened mirror connection with %d lifetime\n", mirror_lifetime);
} else {
mirror_lifetime--;
if (mirror_lifetime == 0) {
fprintf(stderr, "closing mirror session\n");
libwebsocket_close_and_free_session(context,
wsi_mirror, LWS_CLOSE_STATUS_GOINGAWAY);
/*
* wsi_mirror will get set to NULL in
* callback when close completes
*/
}
}
}

Answer 1

I might mix it up but there is an example in libwebsockets where you just open a second browser (window or tab) and then see all the lines and circles you draw in the first browser mirrored and sent to the second browser.