add tcp server support to MavLinkTest

[lovettchris]

Fixes: #
adds tcp server support to mavlinktest

About

PX4 SITL mode make px4_sitl_default none_iris now expects a TCP connection by default. This makes it possible for mavlinktest to accept these TCP connections from PX4.

How Has This Been Tested?

command line test

Usage:

MavLinkTest.exe -server -tcp:localhost:4560

[Dprasad20]

I am getting following error on ubuntu 18.04 while trying to build PX4_SITL:

:~/PX4/PX4-Autopilot$ make px4_sitl_default none_iris
ninja: error: unknown target 'none_iris'
Makefile:227: recipe for target 'px4_sitl_default' failed
make: *** [px4_sitl_default] Error 1

But I am able to build it by following command:
make px4_sitl_default none
but then I am not able to connect AirSim with PX4 (I am starting PX4 using make px4_sitl_default none), following is the output of PX4_SITL:

---

| ___ \ \ \ / / / |
| |/ / \ V / / /| |
| __/ / \ / /| |
| | / /^\ \ ___ |
_| / / |_/

px4 starting.

INFO [px4] startup script: /bin/sh etc/init.d-posix/rcS 0
INFO [param] selected parameter default file parameters.bson
INFO [param] importing from 'parameters.bson'
INFO [parameters] BSON document size 138 bytes, decoded 138 bytes (INT32:2, FLOAT:4)
INFO [param] selected parameter backup file parameters_backup.bson
INFO [dataman] data manager file './dataman' size is 7866640 bytes
INFO [simulator_sih] Simulation loop with 250 Hz (4000 us sim time interval)
INFO [simulator_sih] Simulation with 1.0x speedup. Loop with (4000 us wall time interval)
INFO [lockstep_scheduler] setting initial absolute time to 4000 us
INFO [commander] LED: open /dev/led0 failed (22)
No autostart ID found
etc/init.d-posix/rcS: 263: etc/init.d-posix/rcS: microdds_client: not found
INFO [mavlink] mode: Normal, data rate: 4000000 B/s on udp port 18570 remote port 14550
INFO [mavlink] mode: Onboard, data rate: 4000000 B/s on udp port 14580 remote port 14540
INFO [mavlink] mode: Onboard, data rate: 4000 B/s on udp port 14280 remote port 14030
INFO [mavlink] mode: Gimbal, data rate: 400000 B/s on udp port 13030 remote port 13280
INFO [logger] logger started (mode=all)
INFO [logger] Start file log (type: full)
INFO [logger] [logger] ./log/2022-11-09/14_18_58.ulg
INFO [logger] Opened full log file: ./log/2022-11-09/14_18_58.ulg
INFO [mavlink] MAVLink only on localhost (set param MAV_{i}BROADCAST = 1 to enable network)
INFO [mavlink] MAVLink only on localhost (set param MAV{i}_BROADCAST = 1 to enable network)
INFO [px4] Startup script returned successfully
pxh> INFO [mavlink] partner IP: 127.0.0.1
WARN [health_and_arming_checks] Preflight Fail: Accel 0 uncalibrated
WARN [health_and_arming_checks] Preflight Fail: Compass 0 uncalibrated
INFO [health_and_arming_checks] Preflight Fail: No manual control input
WARN [health_and_arming_checks] Preflight Fail: No connection to the ground control station
INFO [tone_alarm] home set
WARN [health_and_arming_checks] Preflight Fail: Accel 0 uncalibrated
WARN [health_and_arming_checks] Preflight Fail: Compass 0 uncalibrated
INFO [health_and_arming_checks] Preflight Fail: No manual control input
WARN [health_and_arming_checks] Preflight Fail: Accel 0 uncalibrated
WARN [health_and_arming_checks] Preflight Fail: Compass 0 uncalibrated
INFO [health_and_arming_checks] Preflight Fail: No manual control input
WARN [health_and_arming_checks] Preflight Fail: Accel 0 uncalibrated
WARN [health_and_arming_checks] Preflight Fail: Compass 0 uncalibrated
INFO [health_and_arming_checks] Preflight Fail: No manual control input

and the AirSim has the following output on the screen :
Disconnecting mavlink vehicle...
waiting for mavlink vehicle
waiting for TCP connection on port 4560, local IP 127.0.0.1

I have followed this link for setup: https://microsoft.github.io/AirSim/px4_sitl/