Aleksander Morgado
2d8fb51c6b
The plugins can set this property to provide custom initialization commands that
should be issued to the modem before real probing starts.
The value given to the property should be an array of MMPortProbeAtCommand
variables finished with a last one exposing a NULL command, e.g.:
static gboolean
parse_init (const gchar *response,
const GError *error,
GValue *result,
GError **result_error)
{
if (error)
return FALSE;
/* If we didn't get any error, it is an AT port */
g_value_init (result, G_TYPE_BOOLEAN);
g_value_set_boolean (result, TRUE);
return TRUE;
}
static gboolean
parse_init_last (const gchar *response,
const GError *error,
GValue *result,
GError **result_error)
{
g_value_init (result, G_TYPE_BOOLEAN);
/* On last error, report as not being an AT port */
g_value_set_boolean (result, error ? FALSE : TRUE);
return TRUE;
}
static const MMPortProbeAtCommand custom_init[] = {
{ "ATE1 E0", parse_init },
{ "ATE1 E0", parse_init },
{ "ATE1 E0", parse_init_last },
{ NULL }
};
ModemManager. The problem ModemManager tries to solve is to provide a unified high level API for communicating with (mobile broadband) modems. While the basic commands are standardized, the more advanced operations (like signal quality monitoring while connected) varies a lot. Using. ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides DBus API, it is possible to use 'dbus-send' command to control it from the terminal. There's an example program (tests/mm-test.py) that demonstrates the basic API usage. Implementation. ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C. The devices are queried from udev and automatically updated based on hardware events. There's a GInterface (MMModem) that defines the modem interface and any device specific implementation must implement it. There are two generic MMModem implementations to support the basic operations (one for GSM, one for CDMA,) which are common for all cards. Plugins. Plugins are loaded on startup, and must implement the MMPlugin interface. It consists of a couple of methods which tell the daemon whether the plugin supports a port and to create custom MMModem implementations. It most likely makes sense to derive custom modem implementations from one of the generic classes and just add (or override) operations which are not standard. There's a fully working plugin in the plugins/ directory for Huawei cards that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! API. The API is open for changes, so if you're writing a plugin and need to add or change some public method, feel free to suggest it!