Hi Robert, Thanks for your response. it's not related to using Android phone as modem for GPRS Connection from a desktop through RNDIS.
Question 1: is regarding sending a Raw IP packet coming from TcP/IP without PPP involved in a GPRS connection. The RAW ip packet typically coming from tcp/ip would be put into a MUX DLC channel by WWAN Driver, which will expose a virtual ethernet interface to tcp/ip. This is similar to a mechanism in windows mobile NDIS based GPRS, where no PPP comes in picture, directly RAW IP packet coming from TCP/ IP is sent to the MUX DLC through WWAN adapter driver and forwarded to GPRS Modem. Please see the link below: http://msdn.microsoft.com/en-us/library/ee481897.aspx Is there a similar mechanism in Android using some WWAN network interface driver binding to tcp/ip and below end with a MUX DLC Having PPP for GPRS would be a overhead for high speed data supporting modem. Question 2: Please see the roadmap in which it is mentioned simultaneous multiple APN supported added in Q4 2008 http://source.android.com/roadmap Please let me know if you need more information. On 2/5/10, Robert Greenwalt <rgreenw...@google.com> wrote: > Hi Shiva, > > On question 1, do you mean tethering your laptop/desktop through a RNDIS > connection exposed by the android device to forward IP over GPRS? That is > not currently supported. If that's not what you mean can you explain > further? > > On 2, the telephony code and ConnectivityManager don't currently support > simultaneous live PDP contexts, so 2 with the same IP is not yet an issue. > I would suppose that only 1 can be the default route and the other would > have to be explicitly bound at the socket level to send packets over it. > > R > > On Thu, Feb 4, 2010 at 9:13 PM, ShivaP <tsshivapra...@gmail.com> wrote: > >> HI all, >> >> I would like to try again getting some help from forum - >> >> 1) How is RAW IP GPRS mode handled in Android. In Win Mobile there's >> Virtual Ethernet Miniport & WWAN NDIS Miniport adapter to take care of >> this. How this happens in Android.? Is there any doc / link related to >> this. >> >> 2) Multiple APN(Primary PDP): when GPRS context is activated for 2 >> different APNs, and if the network for the 2 APNs assigns Same IP >> Address(Theoritically), then how the connection manager handles such >> situation in Android. >> >> Can somebody throw more light on this.. >> >> Thanks & Regards, >> Shiva Prasad >> >> -- >> unsubscribe: >> android-porting+unsubscr...@googlegroups.com<android-porting%2bunsubscr...@googlegroups.com> >> website: http://groups.google.com/group/android-porting >> > -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
