Implementing iOS Packet Tunnel Provider app extension

[David Woodhouse]

On Wed, 2018-01-17 at 08:00 +0000, Anisimov Vasiliy wrote:
>     Hello again! I've implemented os_setup_tun(), os_write_tun() and
> os_read_tun() as you advised and it works. 
>     
>     And now I have strange behavior - connection on iOS very slow and
> sometimes https sites are not opening. Only difference from mac that
> I see in logs - a lot of small DTLS requests and responces. I've
> attached logs from mac and iOS. Can you please help me figure out
> what I'm doing wrong?
> 
> Mac log:
> https://pastebin.com/nXhySv8K
> ios log:
> https://pastebin.com/rvH6WkS6

What is *in* those small packets (before encryption)? 
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