Re: [help] connect 2 APN at the same time (PPP and QMI)

[Mylene Josserand <mylene.josserand@openwide.fr>]

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Hi Denis,

 
> Pretty much.  When we pass the chat to the gprs_context driver we set
> the slave chat.  This is needed in order to monitor certain events
> which
> come in via AT commands when the PPP link is active.  In effect we
> require 2 AT command ports.


ok, thank you for the explanation.


> On some hardware there was only a single functional PPP port, so the
> driver might need to be modified to handle that case, but it sounds
> like
> you don't have this issue.


Yes, I have 2 AT command ports but I understand that it must be handled differently with only one AT port.


> 
> Cool, feel free to send a patch for this.
> 
> IP settings are notified to oFono by the gprs_context driver.  If
> there
> are IP settings given, then most likely they should be obtained via
> DHCP.  Running test/list-contexts should tell you all the information
> once both contexts are active.


Yes, I already used this test and sent some "dbus-send" command lines to get informations.
I get an IP address according to ofono :

[ /modem_0 ]
    [ /modem_0/context1 ]
        Username = 
        AuthenticationMethod = chap
        Protocol = ip
        Name = Internet
        Settings = { Interface=wwan0 Method=dhcp }
        IPv6.Settings = { }
        Active = 1
        AccessPointName = APN1
        Password = 
        Type = internet

    [ /modem_0/context2 ]
        Username = 
        AuthenticationMethod = chap
        Protocol = ip
        Name = Internet
        Settings = { Interface=ppp0 Netmask=255.255.255.255 Method=static DomainNameServers=0.0.0.0,0.0.0.0, Address=30.1.63.4 }
        IPv6.Settings = { }
        Active = 1
        AccessPointName = APN2
        Password = 
        Type = internet


but with ifconfig, I did not get the IP address on the PPP0 interface (in this example) :

ppp0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wwan0     Link encap:Ethernet  HWaddr 16:12:29:6F:55:C7  
          inet addr:217.200.57.222  Bcast:217.200.57.223  Mask:255.255.255.252
          inet6 addr: fe80::1412:29ff:fe6f:55c7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:15 errors:0 dropped:0 overruns:0 frame:0
          TX packets:39 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1726 (1.6 KiB)  TX bytes:8044 (7.8 KiB)

I run more tests and I tried to exchange the APN names and my problem is not linked to APNs, it is linked to the context2. Whatever APN and whatever interfaces (PPP or QMI) is selected in context 2, it did not get an IP address. So PPP or QMI connections are ok, APN1 or APN2 are ok, this seems to be a context 2 problem. 

I looked deeper in connman's code (which I think is the problem). And, in debug mode, for the 2nd context, the "context_changed" function is called twice with no "Settings" and no "Active" parameters read.

For context 1 :

connmand[1537]: plugins/ofono.c:context_changed() context_path /modem_0/context1
connmand[1537]: plugins/ofono.c:context_changed() /modem_0 Settings
connmand[1537]: plugins/ofono.c:extract_ipv4_settings() Interface wwan0
connmand[1537]: plugins/ofono.c:extract_ipv4_settings() index 35
connmand[1537]: plugins/ofono.c:extract_ipv4_settings() Method dhcp
connmand[1537]: plugins/ofono.c:context_changed() context_path /modem_0/context1
connmand[1537]: plugins/ofono.c:context_changed() /modem_0 Active 1
connmand[1537]: plugins/ofono.c:set_connected() /modem_0

whereas, for context 2 :

connmand[1341]: plugins/ofono.c:context_changed() context_path /modem_0/context2
connmand[1341]: plugins/ofono.c:context_changed() context_path /modem_0/context2


I am going to read/add debug in connman's code (plugin/ofono.c), I will post again if I find something.


Best regards,

Mylène