| DialUp Networking diagram |
| ========================= |
| |
| This diagram explains how oFono and ConnMan are interacting to handle a data |
| call from a DUN client. |
| |
| 1) GAtServer receive ATD*99#. |
| 2) The GAtPPP server is setup. |
| 3) oFono through GAtPPP notify ConnMan that he needs a TUN/TAP interface. |
| 4) oFono is notified that TUN/TAP interface is created and can start exchanging |
| PPP packets with DUN client. Those PPP packets are converted into IP stream |
| and transmitted to/received from TUN/TAP interface. |
| 5) ConnMan is selecting which interface to send IP packets (WiFi, 3G, ...). |
| |
| |
| *----------------* *----------------* |
| | | ATD*99# | | |
| | DUN Client |----------->| GAtServer | |
| | |<---* | | |
| *----------------* | *----------------* |
| | | |
| PPP | | setup_ppp() |
| Packets | | |
| | | |
| | V Need |
| | *----------------* /dev/net/tun *----------------* |
| *--->| | interface | | |
| | GAtPPP |<-------------->| ConnMan | |
| *--->| | interface | | |
| | *----------------* created *----------------* |
| IP | | |
| Stream | |Create |
| | *------------------------* |/dev/net/tun |
| | | | |interface |
| *--->| TUN/TAP interface |<-----------* |
| | | |
| *------------------------* |
| IP | Stream |
| routed with | ConnMan rules |
| *---------------------*--------------------* |
| | | | |
| | | | |
| V V V |
| *-------------* *-------------* *-------------* |
| | | | | | | |
| | WiFi | | Modem | | EthX | |
| | | | | | | |
| *-------------* *-------------* *-------------* |
