sysmocom
/
ofono
mirror of git://git.sysmocom.de/ofono
11
0
Fork 0
Code Issues Releases Activity

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.
This commit is contained in:
Lukasz Nowak 2017-03-29 12:15:01 +01:00 committed by Denis Kenzior
parent ed66682315
commit 81a54c5a47
1 changed files with 32 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/atmodem/gprs.c
View File

@ -50,6 +50,8 @@ struct gprs_data {
GAtChat *chat;
unsigned int vendor;
unsigned int last_auto_context_id;
gboolean telit_try_reattach;
int attached;
};
static void at_cgatt_cb(gboolean ok, GAtResult *result, gpointer user_data)
@ -73,8 +75,10 @@ static void at_gprs_set_attached(struct ofono_gprs *gprs, int attached,
snprintf(buf, sizeof(buf), "AT+CGATT=%i", attached ? 1 : 0);
if (g_at_chat_send(gd->chat, buf, none_prefix,
at_cgatt_cb, cbd, g_free) > 0)
at_cgatt_cb, cbd, g_free) > 0) {
gd->attached = attached;
return;
}
g_free(cbd);
@ -194,6 +198,28 @@ static void cgreg_notify(GAtResult *result, gpointer user_data)
NULL, NULL, NULL, gd->vendor) == FALSE)
return;
/*
* 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.
*/
if (gd->vendor == OFONO_VENDOR_TELIT) {
if (gd->attached && !status && !gd->telit_try_reattach) {
DBG("Trying to re-attach gprs network");
gd->telit_try_reattach = TRUE;
g_at_chat_send(gd->chat, "AT+CGATT=1", none_prefix,
NULL, NULL, NULL);
return;
}
gd->telit_try_reattach = FALSE;
}
ofono_gprs_status_notify(gprs, status);
}
@ -214,6 +240,11 @@ static void cgev_notify(GAtResult *result, gpointer user_data)
if (g_str_equal(event, "NW DETACH") ||
g_str_equal(event, "ME DETACH")) {
if (gd->vendor == OFONO_VENDOR_TELIT &&
gd->telit_try_reattach)
return;
gd->attached = FALSE;
ofono_gprs_detached_notify(gprs);
return;
} else if (g_str_has_prefix(event, "ME PDN ACT")) {