On 16 Dec 2013, at 23:40, Thomas Perl <th.p...@gmail.com> wrote: > Hey, > > 2013/12/16 Martin Grimme <martin.gri...@gmail.com>: >> 2013/12/16, W. Dobbe <winfried.do...@xmsnet.nl>: >>> Probably that will be the end conclusion, but Android is also Linux, so how >>> do the Android network monitor apps get their information? Does the android >>> stack/Dalvik give extra hooks for network inspection ? >> >> Android is not Linux. Android is as much Linux as iOS is BSD. >> Android runs on top of a Linux kernel, but that's all Android and >> GNU/Linux have in common. >> Network inspection is probably exposed by the Android Java API. > > In Android, every application has its own UID, so the "bandwidth per > app" problem can be reduced to "bandwidth per user" in that case. If > you look around the Android sources, there's a way to access these > stats: > > https://github.com/CyanogenMod/android_frameworks_base/blob/cm-10.2/core/java/android/net/NetworkStats.java > > And this is how the stats are collected: > > https://github.com/CyanogenMod/android_frameworks_base/blob/cm-10.2/services/java/com/android/server/net/NetworkStatsCollection.java > https://github.com/CyanogenMod/android_frameworks_base/blob/cm-10.2/services/java/com/android/server/net/NetworkStatsRecorder.java > https://github.com/CyanogenMod/android_frameworks_base/blob/cm-10.2/services/java/com/android/server/net/NetworkStatsService.java >
Hi Thomas, thanks a lot for the insight in Androids monitoring. I have 0 experience with Android myself. > With that said, it's definitely possible with some motivation to do > per-process bandwidth tracking, we did something like this for a Uni > course some years ago: > > http://thp.io/2010/bwmon/ > > This uses the "ip_conntrack" kernel module or - with more recent > kernels - conntrack-tools: > > http://conntrack-tools.netfilter.org/ > > There's even some documentation on how to use the bwmon utility: > > http://thp.io/2010/bwmon/manual.html > > If you plan on using that for the mobile device use case, think about > rewriting the thing in C/C++ instead of Python and make it less > resource-hungry by reducing wake-ups. As Harbour apps are now prefixed > with "harbour-" and have strict requirements for .desktop and icon > file naming, it should be easy to make a system that calculates > per-app bandwidth usage and shows the icon of the app and the name of > the app without too much work. > Hmm, I didn't know conntrack. I'll have a look at that. At first sight it still looks like you need root privileges for conntrack though :-( The problem is not to get the stats, if Nethog can do it, so can a Sailfish app. Problem is to do it in such a way that it will be accepted in Harbour. Still, some more leads to investigate this week. Thanks. > > HTH :) > Thomas _______________________________________________ SailfishOS.org Devel mailing list
