[Bug]: Windows: TCP LISTEN ports are missing from the Ports tab and "Toggle All" breaks the TUI

[homberger]

Description

I have just installed the latest version of witr (v0.3.3) on Windows to inspect the ports opened by running processes, especially TCP ports in the LISTEN state.

Unfortunately, the Ports tab does not appear to work correctly on Windows.

Windows

Environment:

• OS: Windows 11 Pro (German locale)
• witr: v0.3.3
• Shell: PowerShell 7.5.2
• Tested both as a normal user and as Administrator

In the Ports tab, only open UDP ports are displayed. TCP ports in the LISTEN state are missing completely.

However, when pressing a (Toggle All), TCP ports suddenly become visible as well. At that point, however, the TUI becomes unusable: the display is corrupted, rows can no longer be selected, and scrolling up/down does not work correctly.

In other words, enabling Toggle All makes the Ports tab effectively unusable.

I have attached a screenshot showing the resulting display.

Interestingly, the TCP ports that become visible after enabling Toggle All are not shown with the state LISTEN, but as ABHÖREN (German Windows localization). In my terminal this is partially displayed as ABH?REN.

This may be related to the fact that Windows is using a German locale and could indicate an additional localization/encoding issue.

The behavior is identical when running witr as Administrator or as a normal user.

Linux comparison

I also tested witr v0.3.3 on Ubuntu 24.04, running inside a QEMU/KVM virtual machine (not WSL2).

The behavior is different there:

Unprivileged user

When running witr as a normal user, the Ports tab shows no ports at all:

• no UDP ports
• no TCP ports

This also remains the case after using Toggle All.

Root

When running witr as root, the behavior is almost the opposite of Windows:

• UDP ports are not shown by default
• TCP ports are shown
• after pressing a (Toggle All), both TCP and UDP ports are displayed

Unlike on Windows, the TUI remains fully functional in this state. Rows can be selected and the table can be scrolled normally.

Expected behavior

The Ports tab should consistently display the available TCP and UDP sockets according to their state and the user's privileges.

In particular:

• TCP sockets in LISTEN state should be visible without requiring Toggle All.
• Toggle All should reveal the other socket states without breaking the TUI.
• The Ports table should remain fully interactive after toggling all states.
• Port state names should ideally not depend on the localized output of the underlying operating system, or should at least be handled correctly for non-English Windows installations.

Actual behavior

Platform	User	Default	After Toggle All
Windows	normal user	UDP only	TCP appears, but TUI becomes unusable
Windows	Administrator	UDP only	TCP appears, but TUI becomes unusable
Ubuntu 24.04	normal user	no ports	no ports
Ubuntu 24.04	root	TCP only	TCP + UDP, TUI works correctly

This makes me suspect that there may be platform-specific issues in the port enumeration/parsing code, particularly around Windows socket state parsing and/or localized command output.

The Windows-specific rendering issue after Toggle All may be a separate TUI/terminal handling problem.

Screenshot

Attached: witr Ports tab after enabling Toggle All on German Windows.

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Disclaimer

This bug report was written with the assistance of ChatGPT. The technical observations, test results, environments, and reproduction details are my own.

To Reproduce

No response

OS

Windows 11 Pro

Version

v0.3.3

Architecture

amd64

Additional context

No response