Hi, On Mon, May 10, 2010 at 6:44 PM, ms12 <[email protected]> wrote: > Thanks much for the pointers, we are certainly missing some of the > setprop's. I will try those. However, we are using Donut (1.6) and I > wonder if they will work there. > > More detail: > I've not been able to see my way clear to setting up the data call via > the RIL. I think I could spawn ppp (via system(pppd ...) ??) and > connect it to the second CMUX channel when REQUEST_SETUP_DATA_CALL > happened, but I would still need to tell Android to use that channel, > not the original command connection, and I can't see how to do that. > > So what I did was run pppd (with scripts and chat to dial the "ISP" > and using the alternate mux channel on /dev/pts/0) outside of the RIL > from the console. This works, the connection is established, and I > do a setprop net.dns1 manually. (I believe the scripts are doing a > "defaultroute" when pppd starts, the equivalent of route add default > gw xx.xx.xx.xx dev ppp0 I do not need to run route explicitly). At > this point I can ping www.google.com, but any attempt to start the web > browser from Android touchscreen just hangs or gives an error.
In case you use route command, check this. It may help you https://review.source.android.com/#change,9761 Kind regards, > Thanks again for the help. > Mike > On May 10, 3:58 am, Uhrenfeldt Henrik <[email protected]> > wrote: >> Hi ms12, >> >> We created a setup where a 3G mobile broadband dongle works as telephony >> backend for Android Eclaire (without voice calls of course). It sounds >> similar to what you guys are doing. >> >> I believe that implementing an ip-up script in /system/etc/ppp will make >> things work: >> >> /system/etc/ppp/ip-up should contain something like this: >> >> /system/bin/setprop "net.interfaces.defaultroute" "gprs" >> /system/bin/setprop "net.gprs.dns1" "$DNS1" >> /system/bin/setprop "net.gprs.dns2" "$DNS2" >> /system/bin/setprop "net.gprs.local-ip" "$IPLOCAL" >> /system/bin/setprop "net.gprs.remote-ip" "$IPREMOTE" >> /system/bin/setprop "net.gprs.gw" "$IPREMOTE" >> >> This script will run every time PPP sets up a connection and provide Android >> with the correct gateway, dns, etc. To check that it actually ran, I added >> the following: >> >> /system/bin/log -t pppd "IP-UP TRACE for gprs" >> /system/bin/log -t pppd "DNS1 $DNS1" >> /system/bin/log -t pppd "DNS2 $DNS2" >> /system/bin/log -t pppd "local-ip $IPLOCAL" >> /system/bin/log -t pppd "remote-ip $IPREMOTE" >> /system/bin/log -t pppd "gw $IPREMOTE" >> >> ..which will throw useful information into logcat output. >> >> You can also make a /system/etc/ip-down script to change things back the way >> they were (if you have multiple ways of connecting to the internet). >> >> But how do you initiate the PPP connection? Via Android RIL or just via >> init? I am unsure of whether Android will understand that it has a GPRS >> packet data connection without proper handling in the RIL (I don't know if >> setting the above properties is sufficient)... >> >> You should be aware that in later Android releases you need some security >> hacks to allow the RIL to spawn the PPP process (which must run as root), >> and you need some tweaky plumbing to ensure proper interaction between RIL & >> PPP during handling of RIL_REQUEST_SETUP_DATA_CALL... >> >> Let me know how you get along with this. >> >> - Henrik >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Daniel Baeyens >> Sent: 10. maj 2010 10:23 >> To: [email protected] >> >> Cc: android-porting >> Subject: Re: [android-porting] Data connection via cell modem (GPRS) >> >> Hi, >> >> On Mon, May 10, 2010 at 4:53 AM, ms12 <[email protected]> wrote: >> > We are trying to implement a demo of a mobile industrial sensor via >> > android. One of the goals of the demonstration is to send data to a >> > web site. The cell modem is working for SMS messages via the >> > reference RIL just fine. We would like to use GPRS to allow somewhat >> > more data. We currently have the gsm0710muxd working, with one >> > channel connected to the RIL, the other connected via chat/pppd such >> > that ping works from the Linux console. What we can't seem to figure >> > out is how to get Android to use the default route that is set up via >> > pppd. Can anybody give me some pointers on what needs to be done to >> > get Android to use the connection? Thanks much in advance. >> >> Which is the full command you are using for setting the route? >> >> Can you explain a little bit more your process? >> >> KR >> -- >> Daniel Baeyens >> Warp Networks S.L. -http://www.warp.es >> >> -- >> unsubscribe: [email protected] >> website:http://groups.google.com/group/android-porting >> >> -- >> unsubscribe: [email protected] >> website:http://groups.google.com/group/android-porting > > -- > unsubscribe: [email protected] > website: http://groups.google.com/group/android-porting > -- Daniel Baeyens Warp Networks S.L. - http://www.warp.es -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
