[1.x] Replace gethostbyname with getaddrinfo

[bkmgit]

What version of Janus is this happening on?
Commit 963c4b6, current head of repository

Have you tested a more recent version of Janus too?
No - issue affects future releases

Was this working before?
Not applicable

Is there a gdb or libasan trace of the issue?
Not applicable

Additional context
When building for inclusion in Fedora, warning to replace gethostbyname with getaddrinfo is raised. This will allow use of IPv6 addresses. gethostbyname appears at:

• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_nosip.c#L2310
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_nosip.c#L2321
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_sip.c#L6878
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_sip.c#L6889
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_audiobridge.c#L6570

getaddrinfo is used at:

• https://github.com/meetecho/janus-gateway/blob/master/src/turnrest.c#L268
• https://github.com/meetecho/janus-gateway/blob/master/src/events/janus_gelfevh.c#L162
• https://github.com/meetecho/janus-gateway/blob/master/src/ice.c#L1183
• https://github.com/meetecho/janus-gateway/blob/master/src/ice.c#L1241
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_audiobridge.c#L2257
• https://github.com/meetecho/janus-gateway/blob/master/src/plugins/janus_audiobridge.c#L4708

Can make a pull request if of interest.

[lminiero]

When building for inclusion in Fedora, warning to replace gethostbyname with getaddrinfo is raised

Is this a new warning on Fedora 38? I don't seem to be getting those on my build system on Fedora 37. That said, I agree that a more consistent usage would be useful, and that switching to getaddrinfo everywhere helps. If you have a PR ready, that would be welcome, otherwise I can look into making the changes myself. Thanks for the feedback!

[bkmgit]

This warning arises from Fedora tooling for inclusion as a package, it is not a compiler warning. Can make a pull request within the next few days as would like to understand this a little better, but if you want to make the changes before then, that is fine.

[lminiero]

Ack, I'll have a look later today, to make sure such a change won't cause issues in existing features. As a side note, not sure if you'll attend FOSDEM in Brussels in a few days, but I'll be there, so in case I'd love to be able to say hello!

[bkmgit]

Only online.

[lminiero]

I just created a PR, linked above. It required many more changes than I originally anticipated, due to some assumptions the plugins were making on the address family of RTP streams. I plan to make some further changes before this is merged, but you may want to test this already, to check if the warnings you mentioned are solved.

[renich]

Will do. Thank you! :D

[lminiero]

Any feedback on the current state of the PR?

[renich]

Hey @lminiero, sorry for the super dalayed response. I'm gonna try and test this tomorrow morning and give you some feedback. Sorry for the huge delay once again.

[renich]

Hey @lminiero, in my test, it seems to fix the issue.

https://bugzilla.redhat.com/show_bug.cgi?id=2121585#c61

We will still go through Fedora's copr build system in order to see if it passes that test. copr will install all packages and carry out some additional tests and the report will be public. I'll share it once we're done.

[renich]

And it seems to work. No more warnings.

https://download.copr.fedorainfracloud.org/results/@fedora-review/fedora-review-2121585-janus/fedora-rawhide-x86_64/05580064-janus/fedora-review/review.txt