No IP address for a successful connection on LTE modem

[Garfield Watkins]

Sorry, last message was in html format

I have created a plugin for an LTE modem. This modem exposes 1 AT 
command port (e.g. ttyUSB0) and one ethernet port via usb (cdc_ether).


When the modem is inserted via USB, the kernel enumerates some serial 
ports(ttyUSB0 -> ttyUSB7) and a network interface (enp0s20f0u1)


The modem establishes a default bearer on network registration and to 
establish a data network connection I need to create a pdp context 
(AT+CGDCONT) with an APN and thereafter activate it with AT+CGACT=1,1


The modem, which is configured in router mode responds by activating its 
internal dhcp server causing network managers dhcp client to work its 
magic and eventually configure the ethernet port with all the info it 
needs (gateways, dns servers, ip address etc).



This same process is essentially performed by my plugin and yet no IP 
address get assigned to the ethernet adapter exposed by the modem.


Why could this be happening ?

My plugin, specifically the bearer interface implements the folloiwing:

broadband_bearer_class->dial_3gpp = dial_3gpp;
broadband_bearer_class->dial_3gpp_finish = dial_3gpp_finish;
broadband_bearer_class->disconnect_3gpp = disconnect_3gpp;
broadband_bearer_class->disconnect_3gpp_finish = disconnect_3gpp_finish;
broadband_bearer_class->get_ip_config_3gpp = get_ip_config_3gpp;
broadband_bearer_class->get_ip_config_3gpp_finish = 
get_ip_config_3gpp_finish;

Regards

No IP address for a successful connection on LTE modem

[Garfield Watkins]

  
  
I have created a plugin for an LTE modem. This modem exposes 1 AT
  command port (e.g. ttyUSB0) and one ethernet port via usb
  (cdc_ether). 

When the modem is inserted via USB, the kernel enumerates some
  serial ports(ttyUSB0 -> ttyUSB7) and a network interface
  (enp0s20f0u1)

The modem establishes a default bearer on network registration
  and to establish a data network connection I need to create a pdp
  context (AT+CGDCONT) with an APN and thereafter activate it with
  AT+CGACT=1,1
The modem, which is configured in router mode responds by
  activating its internal dhcp server causing network managers dhcp
  client to work its magic and eventually configure the ethernet
  port with all the info it needs (gateways, dns servers, ip address
  etc). 



This same process is essentially performed by my plugin and yet
  no IP address get assigned to the ethernet adapter exposed by the
  modem.
Why could this be happening ?
My plugin, specifically the bearer interface implements the
  folloiwing:

broadband_bearer_class->dial_3gpp = dial_3gpp;broadband_bearer_class->dial_3gpp_finish = dial_3gpp_finish;broadband_bearer_class->disconnect_3gpp = disconnect_3gpp;broadband_bearer_class->disconnect_3gpp_finish = disconnect_3gpp_finish;broadband_bearer_class->get_ip_config_3gpp = get_ip_config_3gpp;broadband_bearer_class->get_ip_config_3gpp_finish = get_ip_config_3gpp_finish;
Regards