IPv6 System.Net.HttpListenerException (400): Invalid port in prefix.

[maxthedread]

dotnet --version
3.1.201

_httpListener.Prefixes.Add("http://[::1]:54321/meow/");

works fine on Windows but fails on linux-x64 (WSL, Ubuntu)

exception: System.Net.HttpListenerException (400): Invalid port in prefix.
at System.Net.HttpEndPointManager.AddPrefixInternal(String p, HttpListener listener)
at System.Net.HttpEndPointManager.AddListener(HttpListener listener)
at System.Net.HttpListener.Start()

Additionally the behavior in regards of IPv4 IPv6 on Windows and Linux is different. With the prefix:
http://localhost:54321/meow/

HttpListener binds both to IPv4 and IPv6 on Windows. But not on Linux.

[ghost]

Area Owners

@dotnet/ncl

[davidsh]

works fine on Windows but fails on linux-x64 (WSL, Ubuntu)

FYI, the implementation of HttpListener on Linux is substantially different than Windows. Windows uses the original .NET Framework (ported to .NET Core) implemented layered on top of http.sys. Linux uses a separate implementation originally from Mono.

[josemoliver]

Similar issue here, works fine in Windows 11 (.net 6.0.401) but fails in Raspberry Pi OS (linux-arm 6.0.401)
System.Net.HttpListenerException (400): Invalid path.

listener.Prefixes.Add("http://*:"+port+"/"+path);

https://github.com/josemoliver/WeatherServer/blob/main/Program.cs