XPost: comp.mobile.android, alt.comp.os.windows-11

What is an adb "reverse tunnel" when connecting Win10 to Android over USB?

I use adb every day after rebooting the desktop every morning.
1. 99 out of 100 times, adb connects with no problems over USB cable.
I don't even worry about ports as it just works.
2. 1 out of 100 times adb fails forever until the PC is rebooted
There is some kind of port conflict between the PC & adb.
3. Then adb again mirrors Android on the PC monitor, keyboard, mouse, etc.
The port conflict magically disappears with a simple reboot.

Why?
Today I decided to capture the log file and noticed a "reverse tunnel".
Could not remove reverse tunnel on port 27189
I have never heard of a reverse tunnel before - so certainly I didn't do it.

Anyone here on Android/Windows newsgroups have experience with this
particular 1 out of 100 failure of adb to connect, which includes
this reverse-tunnel being attempted?

The entire log file before rebooting is shown below for details.

C:\app\editor\android\scrcpy>usb
scrcpy 1.24 <https://github.com/Genymobile/scrcpy>
C:\app\editor\android\scrcpy\scrcpy-server: 1 file pushed, 0 skipped. 32.1 MB/s (41159 bytes in 0.001s)
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27183, retrying on 27184
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27184, retrying on 27185
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27185, retrying on 27186
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27186, retrying on 27187
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27187, retrying on 27188
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
WARN: Could not listen on port 27188, retrying on 27189
ERROR: bind: [10013] An attempt was made to access a socket in a way forbidden by its access permissions.
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb reverse --remove" returned with value 1
WARN: Could not remove reverse tunnel on port 27189
WARN: Could not listen on port 27189, retrying on 27190
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb reverse" returned with value 1
WARN: 'adb reverse' failed, fallback to 'adb forward'
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27183, retrying on 27184
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27184, retrying on 27185
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27185, retrying on 27186
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27186, retrying on 27187
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27187, retrying on 27188
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27188, retrying on 27189
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27189, retrying on 27190
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27190, retrying on 27191
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27191, retrying on 27192
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27192, retrying on 27193
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27193, retrying on 27194
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27194, retrying on 27195
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27195, retrying on 27196
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27196, retrying on 27197
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27197, retrying on 27198
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
WARN: Could not forward port 27198, retrying on 27199
adb.exe: error: device 'RNJK35QUAZMA' not found
ERROR: "adb forward" returned with value 1
ERROR: Could not forward any port in range 27183:27199
ERROR: Server connection failed

C:\app\editor\android\scrcpy>usb

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* Origin: fsxNet Usenet Gateway (21:1/5)

XPost: comp.mobile.android, alt.comp.os.windows-11

Andrew wrote on Mon, 23 Sep 2024 16:13:55 -0000 (UTC) :

C:\app\editor\android\scrcpy>usb
scrcpy 1.24 <https://github.com/Genymobile/scrcpy>

I just realized people won't know what the "usb" command is, which is
called "usb.bat" as there is also a "wifi.bat" command for the LAN.

The usb.bat command is simply a script kindly written by Herbert Kleebauer which contains some "showwin" magic to hide the screen-copy console.

All it does is run one line, where the rest is to hide the console.

:r C:\app\editor\android\scrcpy\usb.bat

@echo off

REM: Download screencopy onto your PC <https://scrcpy.org/>
REM: Set Android "Developer Options" "USB debugging = On"
REM: Then plug the Android phone into the USB port of Windows
REM Then run "scrcpy -s RNJK35QUAZMA" on the Win/Mac/Linux PC
REM: This will mirror Android onto your Win/Mac/Linux PC
REM: But scrcpy leaves an annoying console behind, by default

REM: The entire point of this script is to run that one command
REM: But WITHOUT leaving an empty console behind on Windows.

:: Mirror Android onto Windows w/o leaving a console window behind
cd /d "c:\app\editor\android\scrcpy"
certutil -f -decode %~f0 showwin.exe>nul

:: now we hide console window
showwin.exe 0

:: Change this line below to the unique serial number of your phone
scrcpy -s RNJK35QUAZMA

:: after scrcpy is closed we show console window again
showwin.exe 5

del showwin.exe
goto :eof

REM I have absolutely no idea what the stuff below actually does.

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

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* Origin: fsxNet Usenet Gateway (21:1/5)