mirror of git://git.sysmocom.de/ofono
atmodem: telit - re-attach gprs automatically
Telit AT modem firmware (tested with UE910-EUR) generates +CGREG: 0\r\n\r\n+CGEV: NW DETACH after a context is de-activated and ppp connection closed. Then, after a random amount of time (observed from a few seconds to a few hours), an unsolicited +CGREG: 1 arrives. Attempt to fix the problem, by sending AT+CGATT=1 once. This does not re-activate the context, but if a network connection is still correct, will generate an immediate +CGREG: 1.
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@ -50,6 +50,8 @@ struct gprs_data {
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GAtChat *chat;
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unsigned int vendor;
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unsigned int last_auto_context_id;
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gboolean telit_try_reattach;
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int attached;
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};
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static void at_cgatt_cb(gboolean ok, GAtResult *result, gpointer user_data)
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@ -73,8 +75,10 @@ static void at_gprs_set_attached(struct ofono_gprs *gprs, int attached,
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snprintf(buf, sizeof(buf), "AT+CGATT=%i", attached ? 1 : 0);
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if (g_at_chat_send(gd->chat, buf, none_prefix,
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at_cgatt_cb, cbd, g_free) > 0)
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at_cgatt_cb, cbd, g_free) > 0) {
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gd->attached = attached;
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return;
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}
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g_free(cbd);
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@ -194,6 +198,28 @@ static void cgreg_notify(GAtResult *result, gpointer user_data)
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NULL, NULL, NULL, gd->vendor) == FALSE)
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return;
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/*
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* Telit AT modem firmware (tested with UE910-EUR) generates
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* +CGREG: 0\r\n\r\n+CGEV: NW DETACH
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* after a context is de-activated and ppp connection closed.
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* Then, after a random amount of time (observed from a few seconds
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* to a few hours), an unsolicited +CGREG: 1 arrives.
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* Attempt to fix the problem, by sending AT+CGATT=1 once.
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* This does not re-activate the context, but if a network connection
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* is still correct, will generate an immediate +CGREG: 1.
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*/
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if (gd->vendor == OFONO_VENDOR_TELIT) {
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if (gd->attached && !status && !gd->telit_try_reattach) {
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DBG("Trying to re-attach gprs network");
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gd->telit_try_reattach = TRUE;
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g_at_chat_send(gd->chat, "AT+CGATT=1", none_prefix,
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NULL, NULL, NULL);
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return;
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}
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gd->telit_try_reattach = FALSE;
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}
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ofono_gprs_status_notify(gprs, status);
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}
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@ -214,6 +240,11 @@ static void cgev_notify(GAtResult *result, gpointer user_data)
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if (g_str_equal(event, "NW DETACH") ||
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g_str_equal(event, "ME DETACH")) {
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if (gd->vendor == OFONO_VENDOR_TELIT &&
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gd->telit_try_reattach)
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return;
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gd->attached = FALSE;
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ofono_gprs_detached_notify(gprs);
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return;
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} else if (g_str_has_prefix(event, "ME PDN ACT")) {
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