query on dns resolver

Viktor Dukhovni openssl-users at dukhovni.org
Fri Aug 21 07:54:42 UTC 2020

On Thu, Aug 20, 2020 at 11:56:45PM +0200, David von Oheimb wrote:

> OpenSSL has one function, namely BIO_lookup_ex(), that uses DNS lookup
> functions.  Since commit 28a0841bf58e3813b2e07ad22f19484308e2f70a of
> 02 Feb 2016 it uses getaddrinfo().

Right, but even this is not "DNS lookup".  It is hostname + service name
resolution via the operating system's mechanisms for resolving hostnames
and service names.  This may, or may not, involve DNS lookups.  There is
no code in OpenSSL that *directly* performs DNS lookups.


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