All udp and sctp port forwarding tests are failing but tcp works? That seems like a weird problem. Given we test it with iptables, nftables and firewalld and they all are borken it seems unlikely that this is a issue with the firewall rules.

Package diffs:

• 20240320t153921z-f39f38d13
• 20240102t155643z-f39f38d13 ⇑

@edsantiago mind checking the nmap-ncat version?

Ok perfect, I confirmed locally the ncat update is breaking the tests

Reproducer
terminal 1 (listener)

nc -4 -u -l  -p 5000 </dev/null

terminal 2 (client)

echo test | nc -4 -u 127.0.0.1 5000

The import bit here is </dev/null, without it it prints the output on the listener side correctly. No idea why stdin influences the behaviour of nc here???

strace looks very similar with and without redirection, except for the very end:

--- </dev/null
+++ without redirection
- pselect6(4, [0 3], [], NULL, NULL, NULL) = 2 (in [0 3])
+ pselect6(4, [0 3], [], NULL, NULL, NULL) = 1 (in [3])

- read(0, "", 8192)                       = 0
+ recvfrom(3, "test\n", 8192, 0, NULL, NULL) = 5
+ write(1, "test\n", 5)                   = 5

Why the read(0)?? Next step, fetch and look at git repo.

Yeah no idea, I don't really have time time to dig into it much but I skimmed the upstream bug reports quickly and think nmap/nmap#2685 could describe our issue.
The alternative for us is to switch our test to send no data and just use the client with -z and really on the exit code only.

Nice find. That seems to render nc pretty useless under udp.

Another alternative seems to be yes | nc -4 -u -l -p 5000 --recv-only but that may have other gotchas.

Curious why Renovate is including bumps to Cargo.toml in a CI VM image update PR. That seems to be the reason it keeps force-pushing "new" updates. Maybe there's a rust setting that needs to be turned off for these?

Oh! Nevermind, it's not, and I see this repo is set for:

"rebaseWhen": "behind-base-branch"

That's likely why all the pushes.

Ephemeral COPR build failed. @containers/packit-build please check.

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