Hi Sergei,
On 5/19/21 6:35 PM, Sergei Golubtsov wrote:
Hi Denis,
Thank you very much for your quick and helpful reply.
The problem is a bit vulgar actually. That's a shame that I took your
time for that but I have another question as I am not sure about the
findings below.
no worries.
I had tried to get dump with gsmdial and gsmdial successfully
activated the context. So the problem is that we have authentication
method set to NONE in ofono. But gsmdial uses CHAP by default.
I have manually set the auth to CHAP for the context in ofono and
ofono successfully activated the context.
Yes, oFono used to use CHAP by default, but this was changed a few years ago.
There is the provider info from mobile-broadband-provider-info about
my provider:
<provider>
<name>China Unicom</name>
<gsm>
<network-id mcc="460" mnc="01"/>
<apn value="3gnet">
<plan type="postpaid"/>
<usage type="internet"/>
<username>uninet</username>
</apn>
<apn value="3gwap">
<usage type="mms"/>
<name>联通彩信</name>
<mmsc>http://mmsc.myuni.com.cn</mmsc>
<mmsproxy>10.0.0.172:80</mmsproxy>
</apn>
</gsm>
</provider>
Am I correct that ofono must use CHAP if the auth method is not
specified in the db?
We used to do this, then around Sep-Oct 2018 there was a strong push to add an
explicit 'No Authentication' option for oFono from one of the modem hardware
vendors. I don't recall the exact arguments, search the archives, but the
fallout was that an empty username / password implied no authentication. Which
I think does make a certain amount of sense.
git show 6cf24fe1f9cfa2a61422ad84abfdd32e7ea2cf78. Look around at the commits
from the same author. I do seem to recall that 3GPP mandated CHAP to be used as
the default, even in the no username / password case. But my memory is fuzzy
now, and there hasn't been any problems reported since then (until now).
I see that the technology used by the modem is HSPA. And I see the
following in ofono/drivers/atmodem/lte.c:
/* change the authentication method if the parameters are invalid */
if (!*ldd->pending_info.username || !*ldd->pending_info.password)
auth_method = OFONO_GPRS_AUTH_METHOD_NONE;
And in ofono/plugins/mbpi.c:
/* select authentication method NONE if fit */
if (!ap->username || !ap->password)
ap->auth_method = OFONO_GPRS_AUTH_METHOD_NONE;
As well as ofono/plugins/fileprovision.c::
/* select default authentication method */
(*settings)[0].auth_method = OFONO_GPRS_AUTH_METHOD_NONE;
ofono/src/lte.c:
/* this must have a valid default */
if (!gprs_auth_method_from_string(auth_method_str,
<e->info.auth_method))
lte->info.auth_method = OFONO_GPRS_AUTH_METHOD_NONE;
I am not sure about the standards which may be relevant here. Sorry
for asking this but I thought that we should use CHAP by default,
don't we?
The question is really whether it is the network or the modem at fault here.
Does AUTH_METHOD_NONE work on other networks with this hardware?
Thank you again and have a nice day.
Yours sincerely,
Sergei Golubtsov.
Regards,
-Denis
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