https://bugs.kde.org/show_bug.cgi?id=408796

            Bug ID: 408796
           Summary: Malformed UDP header in IPv6
           Product: kdeconnect
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: android-application
          Assignee: albertv...@gmail.com
          Reporter: a...@thurston.ru
  Target Milestone: ---

I was trying to connect my phone to PC, manually entering IP address.
There is a router between them (Mikrotik with RouterOS) because the phone is
registered in guest Wi-Fi network which is separated from my main LAN.

There's no problem when I enter an IPv4 address manually.

If I enter my PC's IPv6 address:

1. UDP packet for port 1716 goes through the firewall in router and goes out.
However, if I capture it with packet sniffer and and take a look in Wireshark,
I see some raw data instead of parsed UDP header.
2. When the packet arrives to PC's network interface, tcpdump also complains:

12:51:27.744727 IP6 xxxx:xxxx:xxxx:xxxx:7caf:3c9d:1c29:ab4d >
fdd5:e0e1:b7b1:1e33::ee: frag (0|1448) 48200 > 1716: UDP, bad length 1461 >
1440

I'm running KDE Connect 1.12.7 on Android 9.

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