Hello,

dumpcap (and wireshark, if using that dumpcap feature) hangs using a full CPU 
core since 2.2.0 in the following conditions:

- OS is Windows (other OS'es unknown)
- interface is remote ("rpcap://...")
- dumpcap is trying to read the link type (-L)


For example, old stable 2.0.6 works fine:
Wireshark206Portable\App\Wireshark>dumpcap -i rpcap://[172.22.0.12]/eth0 -L
Data link types of interface rpcap://[172.22.0.12]/eth0 (use option -y to set):
  EN10MB (Ethernet)
>


\Wireshark220Portable\App\Wireshark>dumpcap -i rpcap:// [172.22.0.12]/eth0 -L
<<--- hangs using a full CPU core


Wireshark, if using this dumpcap feature hangs as well (when adding remote 
interfaces).

Wireshark 2.0.6 and previous releases work fine.


Capturing traffic actually still works fine, only the -L knob is affected (but 
when adding remote interfaces to Wireshark that knob is always needed).



Thanks,
Lukas Tribus
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