Connect per IPv6

[genofire]

Hello,
i try to connect to a smtp server per ipv6 - which was not possible, even with:

family: :inet6

as parameter (and hacky by change it in code here):

bamboo_smtp/lib/bamboo/adapters/smtp_adapter.ex

Line 43 in afb298e

retries: 1,

I always got:

{:network_failure, 'mx01.example.org', {:error, :enetunreach}}

[MatheusBueno782]

Hello @genofire and sorry for taking too long to answer.

Do you still have the issue? if yes, could you give us more information about it? I little bit more of code and context will help me to give you a more precise answer.

thanks!

[Fnux]

That issue happens when you try to connect to a SMTP when in an IPv6-only environment. Erlang makes a difference between the :inet and :inet6 families, which usually needs to be specified by hand.

I just hit this - my production environment is IPv6-only - and will patch it.

[Fnux]

https://github.com/fewlinesco/bamboo_smtp/blob/develop/lib/bamboo/adapters/smtp_adapter.ex#L524 <- the :family option is not handled in to_gen_smtp_server_config.

[Fnux]

Ah, it's not the gen_smtp server but client config, my bad. We need to specify the sockopts option of gen_smtp_client.

[Fnux]

Erk. sockopts is not simply passed to gen_tcp but processed by smtp_socket (https://github.com/gen-smtp/gen_smtp/blob/master/src/smtp_socket.erl). The later doesn't seem to care much about IPv6...

[Fnux]

After some erlang-reading: inet6 is indeed passed to gen_tcp, but along side the default {:ip, {0,0,0,0}} which should be {:ip, {0,0,0,0,0,0,0,0}}.

[MatheusBueno782]

Hey @Fnux.

Thanks a lot for your contribution! We already merged your patch and it is available in our latest release. I'm closing this issue since it's now solved.