Need some input for my gui app

[akshaykmr]

Edit: here is the repository

Hey there I am currently making a gui app using nethogs at the backend. The idea is to run a light server and use a webview for the desktop app. This way output can also be viewed from the network on a different machine. here are some screenshots

The per process graph can also be seen by selecting the process from the list

The app is still in very early stages and not released yet but some input would be appreciated.
I am using the nethogs trace mode as data source but the data is not clean as I would like (long process path/ IP adresses etc.) I would appreciate if trace mode listed pid, user device as well, more preferably in a JSON format such that any future changes/additions do not break dependent apps(currently I am parsing output line by line column-wise).

[mbfoss]

There is an experiential library feature in nethogs
You need to build the latest master with make then run sudo make install_dev to copy the library and header files to your system.
Then you include libnethogs.h and link to libnethogs and you would be able to receive detailed updates in a C struct.
There is no broad documentation on this feature yet so have a look inside libnethogs.h for how to use the functions.

Basic use:

#include "libnethogs.h"

void onNethogsUpdate(int action, NethogsMonitorRecord const* update)
{
  //updates here
}

int main()
{
  nethogsmonitor_loop(&onNethogsUpdate);
}

Here is an experimental GUI I made using the lib: https://github.com/mbfoss/gnethogs

[raboof]

@akshaykmr that looks pretty amazing!

I agree nethogs' output is currently not very nicely machine-consumable. Indeed a JSON stdout stream feature might be a nice addition, though it might not be suitable for all use cases.

[akshaykmr]

made some progess.

[d3473r]

I want to use libnethogs.h from a python script but I'm not sure how to use the nethogsmonitor_loop correctly, maybe you can help me.

I have defined the following fields following the libnethogs.h

class NethogsMonitorRecord(ctypes.Structure):
    _fields_ = [
        ('record_id', ctypes.c_int), 
        ('name', ctypes.c_char_p), 
        ('pid', ctypes.c_int), 
        ('uid', ctypes.c_uint), 
        ('device_name', ctypes.c_char_p),
        ('sent_bytes', ctypes.c_ulonglong),
        ('recv_bytes', ctypes.c_ulonglong),
        ('sent_kbs', ctypes.c_float),
        ('recv_kbs', ctypes.c_float)]

If I print everything in this class I'm getting strange values:

EDIT:

It is working fine not, i had to add argtypes and use a pointer

Working code