Adding some UDP outputs causes some packets to not be forwarded

[cheintz]

I recently updated my MAVProxy, pymavlink, dronekit, and ArduPlane.

Adding some outputs (via output add or by command line argument --out=) causes some packets to not be sent.

Specifically, I have an Ubuntu VM set up with IP addresses 127.0.0.1 and 10.0.2.15. I launch MAVProxy to host a Plane SITL using

sim_vehicle.py -I2 --console --map --aircraft test

I can connect to it from Dronekit on 127.0.0.1:14570 and can observe that sending rc commands into MAVproxy (like 'rc 1 2000') works and I receive the updated information in Dronekit.

I can output add udp:10.0.2.255:14550 with no ill affects.

If I then add an output to my host machine (Windows 7 x64) using
output add udp:10.29.94.22:14550

I can connect to this from MissionPlanner to this port and receive position, attitude, mode, etc, but not the 'rcin' values. If I change the rc values (using 'rc 1 1000') in MAVlink, the updated values are no longer reflected in DroneKit.

I do know that this setup worked using an old versions of various software (DroneKit, ArduPlane, pymavlink, MAVProxy (latest as of approximately July 24, 2017
I have attached a TLOG file from the host machine to hopefully help diagnose these packets.

2018-08-08 14-24-48.zip