Port.command changes to UDP driver

[sb8244]

It looks like the UDP driver has changed in Erlang 21.3.8.4 which causes all Statix calls to fail. It appears that changing Port.command :gen_udp.send would fix this issue. Is there a reason to not use :gen_udp.send here? One benefit of :gen_udp.send is that the packet creation becomes a bit simpler.

21.3.8.3 - https://github.com/erlang/otp/blob/OTP-21.3.8.3/erts/preloaded/src/prim_inet.erl#L561
21.3.8.4 - https://github.com/erlang/otp/blob/OTP-21.3.8.4/erts/preloaded/src/prim_inet.erl#L568

[sb8244]

Erlang bug tracker has indicated this as "not a bug" because the interface was internal https://bugs.erlang.org/browse/ERL-982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14803#comment-14803

Statix will need to conditionally support the new driver format, or use gen_udp. I'd be happy to PR a :gen_udp swap

[jeffutter]

I've created a fork over at https://github.com/bleacherreport/statix that has a couple of commits merged in that we use. I also have a branch that fixes OTP-21.3.8.4 here: https://github.com/bleacherreport/statix/tree/otp-21.3.8.4-support I think it works, but it probably needs some cleanup and testing.

If anyone is running into this issue with OTP-21.3.8.4 and wants to give it a try that would be appreciated.

[Shayon]

@lexmag Do you feel confident this library will end up solving this issue? Or should I be looking elsewhere?

[dcaixinha]

Beyond the Erlang/OTP versions affected by this bug reported by @sb8244, I was just bitten by this on Erlang/OTP 21.3.8.6: https://github.com/erlang/otp/blob/OTP-21.3.8.6/erts/preloaded/src/prim_inet.erl#L568

Upgrading to v1.2.1 fixed it, so I guess this issue could be closed @lexmag?

[renatoaguiar]

It is happening again with OTP26: erlang/otp#7130

Any plans to move to :gen_udp.send?