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Subject: Re: bridge mac80211_hwsim AP to internet?
From:   Johannes Berg <johannes@sipsolutions.net>
To:     Joshua Zhao <swzhao@gmail.com>, linux-wireless@vger.kernel.org
Date:   Thu, 04 Mar 2021 09:26:07 +0100
In-Reply-To: <CAKmTU=qZUm5T=nOMT-4cpJekKevLETwxY07CDe00iwLxkMpJGQ@mail.gmail.com> (sfid-20210304_021016_482226_92E625AC)
References: <CAKmTU=qZUm5T=nOMT-4cpJekKevLETwxY07CDe00iwLxkMpJGQ@mail.gmail.com>
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On Wed, 2021-03-03 at 16:06 -0800, Joshua Zhao wrote:
> Hi,
> I'm using mac80211_hwsim to simulate a virtual STA and a virtual AP.
> How can I bridge the virtual AP to a backhaul link on my PC (e.g. a
> physical ethernet link) for real internet connection? i.e. so that my
> virtual STA can access the internet.  The AP could be configured in
> NAT mode or layer-2 bridge mode. Is it possible/supported?

Just like on a normal AP? Create a bridge interface (e.g. brctl) and add
the AP and backhaul interface to it. Use IP assignment etc. on the
bridge and configure hostapd accordingly to know about it.

johannes