For what it's worth, libpcap 1.8 and later don't require that a local interface
be openable before listing it in pcap_findalldevs(), so, whilst you might still
need dumpcap to *capture* packets, it should be possible to *enumerate*
interfaces directly within Wireshark/TShark with libpcap 1.8 and later, as you
shouldn't need elevated privileges to enumerate interfaces. This might speed
up the process.
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