You have two solutions, I think:
- Every time a packet comes in, update your widgets and call
while( g_main_context_iteration( NULL, FALSE ) ) ;
this will make the screen repaint.
This is not a good idea. What if there are no packets coming in? Then your GUI would not be responding at all.
If you don't opt for a multithreaded aproach, I think you can have the main loop watch the libpcap file descriptor for you by using g_io_add_watch() or something.
-- Christer
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