opensmtpd 5.4.4 in freebsd 9 jail

[Cedric Berger]

Hello,

Since I upgraded my freebsd 9 jail with the latest opensmtpd 5.4.4_1,1 port,
smtp-out refuse to send any email to the outside world.

I've seen a similar issue reported by "Meutel" here, but with no apparent
solution:

http://blog.gmane.org/gmane.mail.opensmtpd.general/day=20150211, 2nd post.

Based on ktrace analysis, I believe the faulty code starts at line 210 of
getaddrinfo_async.c in libasr:

https://github.com/OpenSMTPD/libasr/blob/libasr-1.0.1/src/getaddrinfo_async.c

This code returns EAI_NONAME if there is no non-loopback interface 
configured
in the jail. This is my case, as a jail by default has only loopback
interfaces configured (this doesn't prevent connecting to the outside 
world).

If my analysis is correct, I believe that if no non-loopback interface is
found, the code should also (in a second step) consider loopback interfaces
when selecting IPv4 versus IPv6, instead of just bailing out.

That would make the code more robust.

Thanks,
Cedric

-- 
Cedric Berger
Precidata Sarl
Maladière 71c
2000 Neuchâtel
cedric at precidata.com
032 930 29 62
079 934 11 02