wwan0 interface without IP

hi !!

i'm back with my project using ofono/connman/sierra 3G modem...

now my modem work fine with ofono until connection. i can see IP address with ofono in debug mode (response from !SCPADDR command) interface wwan0 is UP... but without IPV4 parameters.. (only MAC address)
i can't go to internet with this.

i have try to put connman in debug mode too, and get an error because IPAddress is not set.

at this time, if i start udhcpc -i wwan0... connection is made and work fine....

few seconds only after a very short time, connman say idle timeout and ofono goes offline.

i mean there is something wrong in ofono... (or connman ? don't know..)

someone can help me ?

thank you so much

Hi Eric,

oFono does not assign the IP parameters. ConnMan does that or you need to do this some other way.

Not really enough information. If oFono establishes the connection successfully, then likely you need to look more closely at what is happening with ConnMan.

Regards,
-Denis

i'm right with you but i don't know how ofono deal with connman to trig DHCP.
i know ofono send some parameters (or connman read it on ofono..) like "method" "address" etc..
i know when reading "address" the result is NULL and fail next step in connman du to NULL.

i have made a test patch that put "0.0.0.0" in address in swmodem/gprs_context.c after connect success, but it seem connman always read NULL..

then, i search more what's happend.
I found a solution with connman's ofono plugin that need to be patched.

Now that work great, but i mean there something wrong between ofono/connman altought for this modem.

Hi Eric,

After activating the context, run test/list-contexts in oFono git. What does it say?

Regards,
-Denis

/usr/lib/ofono/test/list-contexts
[ /sierra_1 ]
[ /sierra_1/context1 ]
Username =
Protocol = ip
Name = Internet
Settings = { Interface=wwan0 Method=dhcp } IPv6.Settings = { }
Active = 1
AccessPointName = objcPpublic Password =
Type = internet

for me it's ok. i have made a test to add a "address" to 0.0.0.0 and get this.

/usr/lib/ofono/test/list-contexts
[ /sierra_1 ]
[ /sierra_1/context1 ]
Username =
Protocol = ip
Name = Internet
Settings = { Interface=wwan0 Method=dhcp Address=0.0.0.0 } IPv6.Settings = { }
Active = 1
AccessPointName = objcPpublic
Password =
Type = internet

but in either cases i got connman getting an address..

forget to tell, i must apply this patch too, because my modem do not reconize the command and ofono fail.

diff -uprN a/drivers/swmodem/gprs-context.c b/drivers/swmodem/gprs-context.c
--- a/drivers/swmodem/gprs-context.c 2012-07-02 09:55:34.000000000
+0200
+++ b/drivers/swmodem/gprs-context.c 2014-03-27 23:08:44.904767915
+0100
@@ -100,9 +100,6 @@ static void at_scact_up_cb(gboolean ok,
snprintf(buf, sizeof(buf), "AT!SCPADDR=%u", gcd->active_context); g_at_chat_send(gcd->chat, buf, none_prefix, NULL, NULL, NULL);

- snprintf(buf, sizeof(buf), "AT+CGCONTRDP=%u", gcd->active_context);
- g_at_chat_send(gcd->chat, buf, none_prefix, NULL, NULL, NULL);
-
modem = ofono_gprs_context_get_modem(gc);
interface = ofono_modem_get_string(modem, "NetworkInterface");