Shell script should switch if connection established but doesn't
Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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I don't know how can you solve it, but I think that you can't be connected both gprs and wifi at the same time.
Therefor and because I trust "ifconfig" I suggest to use only:
interface=`ifconfig | grep -iE "(wlan0|gprs0)" | awk '{print $1}'`
Interface status, can be changed only by ifup/ifdown, so if you have in output "wlan0", that means only that wlan0 is activated and nothing else.
P.S. But can you turn "up" both interfaces gprs and wifi?
So at the end of the line you can see interface (gprs|wlan) where your packets go out.
So if you parse that output you can be certainly sure what you are connected with.
Ok, thanks. I will try it but can you please explain me what the difference is to my ifconfig solution? It should give the same output. Is this more reliable?
Default route is very important information - it shows you where your packets go to. Even if you have two active interfaces, default route will be only one - to gprs or wlan0.
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