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fibocom: Monitor connection status using +GTRNDIS?

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In situations where the configured APN for the initial EPS bearer
(cid=1) does not match the APN for the actual connection, ModemManager
sets up a context (cid!=1) with the proper APN when connecting. If the
APN for the initial EPS bearer was not valid, the SIM may fall back to a
default one. If that default matches the APN for the proper connection,
the initial EPS bearer is re-used for the actual connection. In that
scenario, +CGACT? will report deactivated for the actual connection
context (cid!=1). ModemManager subsequently reports the connection as
disconnected.

+GTRNDIS? will always reflect the correct state for the context ID we
used to set up the ECM connection. Hence, it makes sense to use this
command to assess the connection status.

This has been tested with the MA510-GL modem module.

Signed-off-by: Sven Schwermer <sven.schwermer@disruptive-technologies.com>
This commit is contained in:
Sven Schwermer
2022-08-05 11:20:08 +02:00
committed by Aleksander Morgado
parent 04ed52a74c
commit e5bb33a463
1 changed files with 71 additions and 0 deletions
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71
plugins/fibocom/mm-broadband-bearer-fibocom-ecm.c
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@@ -63,6 +63,73 @@ parse_gtrndis_read_response (const gchar *response,
return TRUE;
}
/*****************************************************************************/
/* Connection status monitoring */
static MMBearerConnectionStatus
load_connection_status_finish (MMBaseBearer *bearer,
GAsyncResult *res,
GError **error)
{
GError *inner_error = NULL;
gssize value;
value = g_task_propagate_int (G_TASK (res), &inner_error);
if (inner_error) {
g_propagate_error (error, inner_error);
return MM_BEARER_CONNECTION_STATUS_UNKNOWN;
}
return (MMBearerConnectionStatus) value;
}
static void
gtrndis_query_ready (MMBaseModem *modem,
GAsyncResult *res,
GTask *task)
{
MMBaseBearer *bearer;
GError *error = NULL;
const gchar *result;
guint state;
guint cid;
bearer = g_task_get_source_object (task);
result = mm_base_modem_at_command_finish (modem, res, &error);
if (!result)
g_task_return_error (task, error);
else if (!parse_gtrndis_read_response (result, &state, &cid, &error))
g_task_return_error (task, error);
else if (!state || (gint) cid != mm_base_bearer_get_profile_id (bearer))
g_task_return_int (task, MM_BEARER_CONNECTION_STATUS_DISCONNECTED);
else
g_task_return_int (task, MM_BEARER_CONNECTION_STATUS_CONNECTED);
g_object_unref (task);
}
static void
load_connection_status (MMBaseBearer *bearer,
GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
MMBaseModem *modem = NULL;
task = g_task_new (bearer, NULL, callback, user_data);
g_object_get (MM_BASE_BEARER (bearer),
MM_BASE_BEARER_MODEM, &modem,
NULL);
mm_base_modem_at_command (modem,
"+GTRNDIS?",
3,
FALSE,
(GAsyncReadyCallback) gtrndis_query_ready,
task);
g_object_unref (modem);
}
/*****************************************************************************/
/* 3GPP Connect */
@@ -458,8 +525,12 @@ mm_broadband_bearer_fibocom_ecm_init (MMBroadbandBearerFibocomEcm *self)
static void
mm_broadband_bearer_fibocom_ecm_class_init (MMBroadbandBearerFibocomEcmClass *klass)
{
MMBaseBearerClass *base_bearer_class = MM_BASE_BEARER_CLASS (klass);
MMBroadbandBearerClass *broadband_bearer_class = MM_BROADBAND_BEARER_CLASS (klass);
base_bearer_class->load_connection_status = load_connection_status;
base_bearer_class->load_connection_status_finish = load_connection_status_finish;
broadband_bearer_class->connect_3gpp = connect_3gpp;
broadband_bearer_class->connect_3gpp_finish = connect_3gpp_finish;
broadband_bearer_class->dial_3gpp = dial_3gpp;