I solved the problem myself...
I have registered my service in the "Client Registering" state and then the
avahi_service_browser_new call does not fail in assertion.
It is a little bit strange and I don't understand it but now it works...
Can somebody explain this?
Correct working version:
> + create a Avahi client (with flag AVAHI_CLIENT_NO_FAIL)
> + create a service browser for _printer._tcp
> + get browser callbacks for printers found
> + restart avahi daemon
> + upon connection lost client callback free the client and create a new
> Avahi client
> + upon client in state AVAHI_CLIENT_S_REGISTERING: I create a new
> service browser for _printer._tcp.
> + get browser callbacks for printers found
Version that runs into assertion:
> + create a Avahi client (with flag AVAHI_CLIENT_NO_FAIL)
> + create a service browser for _printer._tcp
> + get browser callback for printers found
> + restart avahi daemon
> + upon connection lost client callback free the client and create a new
> Avahi client
> + upon client in state AVAHI_CLIENT_S_RUNNING: I create a new service
> browser for _printer._tcp.
> + then I get a assertion "AvahiTest: browser.c:583:
> avahi_service_browser_new: Assertion `client' failed."
E-J
Op 12 mei 2011, om 22:04 heeft E-J van der Linden het volgende geschreven:
> My test is according to this:
>
> + create a Avahi client (with flag AVAHI_CLIENT_NO_FAIL)
> + create a service browser
> + get browser callback
> + restart avahi daemon
> + upon connection lost client callback free the client and create a new
> Avahi client
> + upon client in state AVAHI_CLIENT_S_RUNNING: I create a new service
> browser.
> + then I get a assertion "AvahiTest: browser.c:583:
> avahi_service_browser_new: Assertion `client' failed."
>
> Could somebody tell me how I register for new services after the daemon was
> down and coming up again?
>
> Here are the details:
>
> I create a client
>
> glib_poll = avahi_glib_poll_new (NULL, G_PRIORITY_DEFAULT);
> // Create the GLIB Adaptor
> poll_api = avahi_glib_poll_get (glib_poll);
>
> // Create a new AvahiClient instance
> gClient = avahi_client_new ( poll_api,
> AVAHI_CLIENT_NO_FAIL,
> avahi_client_callback,
> NULL,
>
> &error);
>
> ** Message: Avahi Client State Change: 2
> ** Message: Client running; connected to the Avahi Daemon
>
>
> Then I create a service browser
>
> gSb = avahi_service_browser_new(gClient, AVAHI_IF_UNSPEC,
> AVAHI_PROTO_UNSPEC, "_printer._tcp", NULL, 0, browse_callback, gClient );
>
>
> Now I get browse callbacks for services of type _printer._tcp which I can
> resolve.
>
>
> Now I restart the avahi daemon and I get client callbacks from the different
> states:
>
> ** Message: Avahi Client State Change: 100
> ** Message: Disconnected from the Avahi Daemon: Daemon connection failed
> ** Message: Avahi Client State Change: 101
> ** Message: Client is connecting to the Avahi Daemon
> ** Message: Avahi Client State Change: 1
> ** Message: Client registering
> ** Message: Avahi Client State Change: 2
> ** Message: Client running; connected to the Avahi Daemon
>
> I release the client upon disconnection and then I start a new one.
>
> glib_poll = avahi_glib_poll_new (NULL, G_PRIORITY_DEFAULT);
> // Create the GLIB Adaptor
> poll_api = avahi_glib_poll_get (glib_poll);
>
> // Create a new AvahiClient instance
> gClient = avahi_client_new ( poll_api,
> AVAHI_CLIENT_NO_FAIL,
> avahi_client_callback,
> NULL,
>
> &error);
>
>
> When the client is again in state AVAHI_CLIENT_S_RUNNING, I start a new
> browser for the _printer._tcp service when we are connected to the daemon
> Then I get the following assertion:
>
> AvahiTest: browser.c:583: avahi_service_browser_new: Assertion `client'
> failed.
>
> This is my client callback:
>
> switch (state) {
>
> case AVAHI_CLIENT_FAILURE:
> {
> g_message ("Disconnected from the Avahi Daemon: %s",
> avahi_strerror(avahi_client_errno(client)));
> avahi_client_free (gClient);
> lResult = AvahiLibStartClient();
> break;
> }
> case AVAHI_CLIENT_CONNECTING:
> {
> g_message ("Client is connecting to the Avahi Daemon");
>
> break;
> }
>
> case AVAHI_CLIENT_S_RUNNING:
> {
> g_message ("Client running; connected to the Avahi
> Daemon");
> gSb = avahi_service_browser_new(gClient,
> AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_printer._tcp", NULL, 0,
> browse_callback, gClient );
> break;
> }
> case AVAHI_CLIENT_S_REGISTERING:
> {
> g_message ("Client registering");
> break;
> }
> case AVAHI_CLIENT_S_COLLISION:
> {
> g_message ("Client collision");
> break;
> }
> default:
> {
> g_message ("Client to an undefined state?");
> // no action
> }
> }
>
>
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