int InitializeZeroconf()
{
int error;
//int ret = 1;
int timeout = 50; //500ms
const char *avahiVersion;
CThread_mutex_lock(&zeroconfInitLock);
if(Dns_sdInitialized)
{
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_OK;
}
#ifdef ZEROCONF_RUNTIME_LINKING
avahiLibHandle = dlopen("libavahi-client.so",RTLD_LAZY);
if(!avahiLibHandle)
{
avahiLibHandle = dlopen("libavahi-client.so.3",RTLD_LAZY);
}
if(!avahiLibHandle)
{
LOG(PHIDGET_LOG_WARNING, "dlopen failed with error: %s", dlerror());
LOG(PHIDGET_LOG_WARNING, "Assuming that zeroconf is not supported on this machine.");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNSUPPORTED;
}
//These are always in Avahi
if(!(avahi_client_get_version_string_ptr = (avahi_client_get_version_string_type)dlsym(avahiLibHandle, "avahi_client_get_version_string"))) goto dlsym_err;
if(!(avahi_service_browser_new_ptr = (avahi_service_browser_new_type)dlsym(avahiLibHandle, "avahi_service_browser_new"))) goto dlsym_err;
if(!(avahi_service_resolver_new_ptr = (avahi_service_resolver_new_type)dlsym(avahiLibHandle, "avahi_service_resolver_new"))) goto dlsym_err;
if(!(avahi_service_resolver_free_ptr = (avahi_service_resolver_free_type)dlsym(avahiLibHandle, "avahi_service_resolver_free"))) goto dlsym_err;
if(!(avahi_record_browser_new_ptr = (avahi_record_browser_new_type)dlsym(avahiLibHandle, "avahi_record_browser_new"))) goto dlsym_err;
if(!(avahi_record_browser_free_ptr = (avahi_record_browser_free_type)dlsym(avahiLibHandle, "avahi_record_browser_free"))) goto dlsym_err;
if(!(avahi_service_name_join_ptr = (avahi_service_name_join_type)dlsym(avahiLibHandle, "avahi_service_name_join"))) goto dlsym_err;
if(!(avahi_client_new_ptr = (avahi_client_new_type)dlsym(avahiLibHandle, "avahi_client_new"))) goto dlsym_err;
if(!(avahi_client_free_ptr = (avahi_client_free_type)dlsym(avahiLibHandle, "avahi_client_free"))) goto dlsym_err;
if(!(avahi_strerror_ptr = (avahi_strerror_type)dlsym(avahiLibHandle, "avahi_strerror"))) goto dlsym_err;
if(!(avahi_client_errno_ptr = (avahi_client_errno_type)dlsym(avahiLibHandle, "avahi_client_errno"))) goto dlsym_err;
//These are in Avahi > 0.6.4
if(!(avahi_threaded_poll_new_ptr = (avahi_threaded_poll_new_type)dlsym(avahiLibHandle, "avahi_threaded_poll_new"))) goto dlsym_err2;
if(!(avahi_threaded_poll_free_ptr = (avahi_threaded_poll_free_type)dlsym(avahiLibHandle, "avahi_threaded_poll_free"))) goto dlsym_err2;
if(!(avahi_threaded_poll_get_ptr = (avahi_threaded_poll_get_type)dlsym(avahiLibHandle, "avahi_threaded_poll_get"))) goto dlsym_err2;
if(!(avahi_threaded_poll_start_ptr = (avahi_threaded_poll_start_type)dlsym(avahiLibHandle, "avahi_threaded_poll_start"))) goto dlsym_err2;
if(!(avahi_threaded_poll_stop_ptr = (avahi_threaded_poll_stop_type)dlsym(avahiLibHandle, "avahi_threaded_poll_stop"))) goto dlsym_err2;
if(!(avahi_threaded_poll_quit_ptr = (avahi_threaded_poll_quit_type)dlsym(avahiLibHandle, "avahi_threaded_poll_quit"))) goto dlsym_err2;
if(!(avahi_threaded_poll_lock_ptr = (avahi_threaded_poll_lock_type)dlsym(avahiLibHandle, "avahi_threaded_poll_lock"))) goto dlsym_err2;
if(!(avahi_threaded_poll_unlock_ptr = (avahi_threaded_poll_unlock_type)dlsym(avahiLibHandle, "avahi_threaded_poll_unlock"))) goto dlsym_err2;
goto dlsym_good;
dlsym_err:
LOG(PHIDGET_LOG_WARNING, "dlsym failed with error: %s", dlerror());
LOG(PHIDGET_LOG_WARNING, "Assuming that zeroconf is not supported on this machine.");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNSUPPORTED;
//Old avahi didn't have the thread functions
dlsym_err2:
LOG(PHIDGET_LOG_WARNING, "dlsym failed with error: %s", dlerror());
LOG(PHIDGET_LOG_WARNING, "Avahi is too old, upgrade to at least version 0.6.4.");
LOG(PHIDGET_LOG_WARNING, "Zeroconf will not be used on this machine.");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNSUPPORTED;
dlsym_good:
#endif
/* Allocate main loop object */
if (!(threaded_poll = avahi_threaded_poll_new_ptr())) {
LOG(PHIDGET_LOG_ERROR, "Failed to create threaded poll object.");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
/* Allocate a new client */
client = avahi_client_new_ptr(avahi_threaded_poll_get_ptr(threaded_poll), 0, client_callback, NULL, &error);
/* Check wether creating the client object succeeded */
if (!client) {
LOG(PHIDGET_LOG_ERROR, "Failed to create client: %s", avahi_strerror_ptr(error));
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
//get version
avahiVersion = avahi_client_get_version_string_ptr(client);
/* Create the service browsers */
if (!(zeroconf_browse_ws_ref = avahi_service_browser_new_ptr(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_phidget_ws._tcp", NULL, 0, DNSServiceBrowse_ws_CallBack, client))) {
LOG(PHIDGET_LOG_ERROR, "Failed to create service browser: %s", avahi_strerror_ptr(avahi_client_errno_ptr(client)));
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
if (!(zeroconf_browse_phidget_ref = avahi_service_browser_new_ptr(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_phidget._tcp", NULL, 0, DNSServiceBrowse_Phidget_CallBack, client))) {
LOG(PHIDGET_LOG_ERROR, "Failed to create service browser: %s", avahi_strerror_ptr(avahi_client_errno_ptr(client)));
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
if (!(zeroconf_browse_sbc_ref = avahi_service_browser_new_ptr(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_phidget_sbc._tcp", NULL, 0, DNSServiceBrowse_SBC_CallBack, client))) {
LOG(PHIDGET_LOG_ERROR, "Failed to create service browser: %s", avahi_strerror_ptr(avahi_client_errno_ptr(client)));
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
if(avahi_threaded_poll_start_ptr(threaded_poll))
{
LOG(PHIDGET_LOG_ERROR, "avahi_threaded_poll_start_ptr failed");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
//Thread is started successfully
else
{
//There is a bug in at least Avahi 0.6.16 (Debian Etch default) where thread_running is not set, so quit doesn't work!!!???!?!?!?!?!?!
//This is fixed in 0.6.24
//So I'll set it myself here
if(strcmp(avahiVersion, "avahi 0.6.24") < 0)
{
LOG(PHIDGET_LOG_INFO, "Fixing thread_running bug in avahi < 0.6.24");
threaded_poll->thread_running = 1;
}
}
while(!Dns_sdInitialized)
{
usleep(10000);
timeout--;
if(!timeout)
{
UninitializeZeroconf();
LOG(PHIDGET_LOG_ERROR, "InitializeZeroconf Seems bad... Dns_sdInitialized wasn't set to true.");
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_UNEXPECTED;
}
}
LOG(PHIDGET_LOG_INFO, "InitializeZeroconf Seems good... (%s)",avahiVersion);
CThread_mutex_unlock(&zeroconfInitLock);
return EPHIDGET_OK;
}
int InitializeZeroconf()
{
int error;
//int ret = 1;
int timeout = 50; //500ms
if(Dns_sdInitialized) return EPHIDGET_OK;
#ifdef ZEROCONF_RUNTIME_LINKING
avahiLibHandle = dlopen("libavahi-client.so",RTLD_LAZY);
if(!avahiLibHandle)
{
LOG(PHIDGET_LOG_WARNING, "dlopen failed with error: %s", dlerror());
LOG(PHIDGET_LOG_WARNING, "Assuming that zeroconf is not supported on this machine.");
return EPHIDGET_UNSUPPORTED;
}
if(!(avahi_service_browser_new_ptr = (avahi_service_browser_new_type)dlsym(avahiLibHandle, "avahi_service_browser_new"))) goto dlsym_err;
if(!(avahi_service_resolver_new_ptr = (avahi_service_resolver_new_type)dlsym(avahiLibHandle, "avahi_service_resolver_new"))) goto dlsym_err;
if(!(avahi_service_resolver_free_ptr = (avahi_service_resolver_free_type)dlsym(avahiLibHandle, "avahi_service_resolver_free"))) goto dlsym_err;
if(!(avahi_record_browser_new_ptr = (avahi_record_browser_new_type)dlsym(avahiLibHandle, "avahi_record_browser_new"))) goto dlsym_err;
if(!(avahi_record_browser_free_ptr = (avahi_record_browser_free_type)dlsym(avahiLibHandle, "avahi_record_browser_free"))) goto dlsym_err;
if(!(avahi_service_name_join_ptr = (avahi_service_name_join_type)dlsym(avahiLibHandle, "avahi_service_name_join"))) goto dlsym_err;
if(!(avahi_client_new_ptr = (avahi_client_new_type)dlsym(avahiLibHandle, "avahi_client_new"))) goto dlsym_err;
if(!(avahi_client_free_ptr = (avahi_client_free_type)dlsym(avahiLibHandle, "avahi_client_free"))) goto dlsym_err;
if(!(avahi_strerror_ptr = (avahi_strerror_type)dlsym(avahiLibHandle, "avahi_strerror"))) goto dlsym_err;
if(!(avahi_client_errno_ptr = (avahi_client_errno_type)dlsym(avahiLibHandle, "avahi_client_errno"))) goto dlsym_err;
if(!(avahi_threaded_poll_new_ptr = (avahi_threaded_poll_new_type)dlsym(avahiLibHandle, "avahi_threaded_poll_new"))) goto dlsym_err;
if(!(avahi_threaded_poll_free_ptr = (avahi_threaded_poll_free_type)dlsym(avahiLibHandle, "avahi_threaded_poll_free"))) goto dlsym_err;
if(!(avahi_threaded_poll_get_ptr = (avahi_threaded_poll_get_type)dlsym(avahiLibHandle, "avahi_threaded_poll_get"))) goto dlsym_err;
if(!(avahi_threaded_poll_start_ptr = (avahi_threaded_poll_start_type)dlsym(avahiLibHandle, "avahi_threaded_poll_start"))) goto dlsym_err;
if(!(avahi_threaded_poll_stop_ptr = (avahi_threaded_poll_stop_type)dlsym(avahiLibHandle, "avahi_threaded_poll_stop"))) goto dlsym_err;
if(!(avahi_threaded_poll_quit_ptr = (avahi_threaded_poll_quit_type)dlsym(avahiLibHandle, "avahi_threaded_poll_quit"))) goto dlsym_err;
if(!(avahi_threaded_poll_lock_ptr = (avahi_threaded_poll_lock_type)dlsym(avahiLibHandle, "avahi_threaded_poll_lock"))) goto dlsym_err;
if(!(avahi_threaded_poll_unlock_ptr = (avahi_threaded_poll_unlock_type)dlsym(avahiLibHandle, "avahi_threaded_poll_unlock"))) goto dlsym_err;
goto dlsym_good;
dlsym_err:
LOG(PHIDGET_LOG_WARNING, "dlsym failed with error: %s", dlerror());
LOG(PHIDGET_LOG_WARNING, "Assuming that zeroconf is not supported on this machine.");
return EPHIDGET_UNSUPPORTED;
dlsym_good:
#endif
/* Allocate main loop object */
if (!(threaded_poll = avahi_threaded_poll_new_ptr())) {
LOG(PHIDGET_LOG_ERROR, "Failed to create threaded poll object.");
return EPHIDGET_UNEXPECTED;
}
/* Allocate a new client */
client = avahi_client_new_ptr(avahi_threaded_poll_get_ptr(threaded_poll), 0, client_callback, NULL, &error);
/* Check wether creating the client object succeeded */
if (!client) {
LOG(PHIDGET_LOG_ERROR, "Failed to create client: %s", avahi_strerror_ptr(error));
return EPHIDGET_UNEXPECTED;
}
/* Create the service browsers */
if (!(zeroconf_browse_ws_ref = avahi_service_browser_new_ptr(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_phidget_ws._tcp", NULL, 0, DNSServiceBrowse_ws_CallBack, client))) {
LOG(PHIDGET_LOG_ERROR, "Failed to create service browser: %s", avahi_strerror_ptr(avahi_client_errno_ptr(client)));
return EPHIDGET_UNEXPECTED;
}
if (!(zeroconf_browse_phidget_ref = avahi_service_browser_new_ptr(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "_phidget._tcp", NULL, 0, DNSServiceBrowse_Phidget_CallBack, client))) {
LOG(PHIDGET_LOG_ERROR, "Failed to create service browser: %s", avahi_strerror_ptr(avahi_client_errno_ptr(client)));
return EPHIDGET_UNEXPECTED;
}
if(avahi_threaded_poll_start_ptr(threaded_poll))
{
LOG(PHIDGET_LOG_ERROR, "avahi_threaded_poll_start_ptr failed");
return EPHIDGET_UNEXPECTED;
}
while(!Dns_sdInitialized)
{
usleep(10000);
timeout--;
if(!timeout)
{
UninitializeZeroconf();
LOG(PHIDGET_LOG_ERROR, "InitializeZeroconf Seems bad... Dns_sdInitialized wasn't set to true.");
return EPHIDGET_UNEXPECTED;
}
}
LOG(PHIDGET_LOG_INFO, "InitializeZeroconf Seems good...");
return EPHIDGET_OK;
}
