From: Guus Sliepen <guus@tinc-vpn.org>
Date: Wed, 11 Oct 2017 18:02:22 +0000 (+0200)
Subject: Handle tun/tap device returning EPERM or EBUSY.
X-Git-Tag: release-1.0.33~10
X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=a7e906d2d6b15dd9e6c471a720bbbc39bd9da9a7;hp=a7e906d2d6b15dd9e6c471a720bbbc39bd9da9a7

Handle tun/tap device returning EPERM or EBUSY.

Often when tun/tap is used any errors during setup will be confuse tinc
and it will then assume it is an Ethertap device. Try to avoid this by
checking errno after a failed TUNSETIFF; if it's EPERM or EBUSY then
we can be sure it was not an Ethertap device, and we should report an
error instead.

Closes #157 on GitHub.
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