ZTE MF825 HTTP connection

[david preetham]

Hi,
we are trying to develop application for ZTE MF825 dongle, which will work
on http requests. When device is plugged in it loads cdc_ether driver and
192.168.0.144 private IP is acquired. Using following http requests we are
able to connect and disconnect to service provider.

http://192.168.0.1/goform/goform_set_cmd_process?goformId=CONNECT_NETWORK

http://192.168.0.1/goform/goform_set_cmd_process?goformId=DISCONNECT_NETWORK

by using http://192.168.0.1/goform/goform_get_cmd_process?cmd=wan_ipaddr we
are able to see public IP wan_ipaddr":"100.64.238.123" each time of
connection this public IP varies.

we are able to telnet modem with ip 192.168.0.1.

root at 9615-cdp:/proc/693/net# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:896 (896.0 B)  TX bytes:896 (896.0 B)

rmnet0    Link encap:UNSPEC  HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:192.168.0.2  Mask:255.255.255.0
          UP RUNNING  MTU:1500  Metric:1
          RX packets:2334 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2445 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2128545 (2.0 MiB)  TX bytes:303632 (296.5 KiB)

rmnet1    Link encap:UNSPEC  HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet6 addr: fe80::36a7:73e6:a79e:4bc5/64 Scope:Link
          UP RUNNING PROMISC ALLMULTI  MTU:1500  Metric:1
          RX packets:7 errors:0 dropped:0 overruns:0 frame:0
          TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:616 (616.0 B)  TX bytes:3728 (3.6 KiB)

usb0      Link encap:Ethernet  HWaddr 34:4B:50:B7:EF:08
          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::364b:50ff:feb7:ef08/64 Scope:Link
          UP BROADCAST RUNNING PROMISC ALLMULTI MULTICAST  MTU:1500
 Metric:1
          RX packets:6050 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5673 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:564301 (551.0 KiB)  TX bytes:3369013 (3.2 MiB)

please explain
1) we are not able to see any loaded modules. how usb0 and rmnetx
interfaces are created?
2) How modem is able to connect to service providers using http requests?
3) Is there any NAT used between private and public IP?

Regards,
David
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