Server components not listening to ipv4 (ipv6 compatability issue)

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
haskell
Domain
backend, networking

Research direction

Start with the SMP and XFTP server component entry points and compare their network-binding behavior with version v4.4.1. Reproduce the issue with IPv6 enabled and disabled, then verify that both components listen on IPv4 and still start correctly when IPv6 is unavailable.

Written by the indexing model from the issue text.

Description

With the introduction of ipv6 support, the server components (smp and xftp) do not listen to ipv4 any more. The server components bind to their respective ports on ipv6, but not on ipv4. If ipv6 is disabled on the server, the smp and xftp components fail to start. In my tests the last fully working smp-server version is v4.4.1. I suspect, it's some kind of regression with ipv6 support.

Dominant language
Haskell
Stars
847
Forks
111
Avg merge
3d 11h
Merged PRs (30d)
9

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