netdev - network status

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Message-ID: <CAH9_wRNWRG0zY20OCXyL_MDci3Bw+RYDjQJCu15+c82C1Eon=Q@mail.gmail.com>
Date:   Wed, 25 Jan 2017 01:09:54 +0530
From:   Sriram V <vshrirama@...il.com>
To:     netdev@...r.kernel.org
Subject: network status

Hello,

Apologies in case, this is not the right list of this question.

I wanted to check, How can i find out if a network status has changed

1. How can the user application find out if the link status has changed?
2. what changes do i need to add in the driver to indicate to the user
applications that ethernet cable has been plugged in or unplugged.

3. How should a user application know the status change (Should the
userapp poll on the interface/is there an uevent interface to indicate
the link status change)

Thanks.
Sriram