CODEWITHSUNDEEP
clinuxnetwork-programminglinux-kerneldns
EdwardH
EdwardH

Reputation: 1573

Controlling Name Resolution server (DNS) address per request

Looking for ideas on how to generate a Name Resolution request and specify to which server to dispatch the request.

I'm working on Linux.

Up until now, I found two options:

  1. Use an external library which can be hooked for achieving this. Anyone knows a reliable DNS library that can be used for a production system?

  2. Use Network Namespaces to virtualize the stack and use mounting to link the name resolution server files per namespace (see iproute2 latest version). Requests issued from each namespace may have different servers.

please share your thoughts...

Upvotes: 0

Views: 155

Answers (1)

Wes Hardaker
Wes Hardaker

Reputation: 22262

Linux actually comes with a resolver API. See the man(3) page for 'resolver', and link your application with -lresolv.

The libsres library (dnsval) from the DNSSEC-Tools project definitely lets you send queries to a particular server. I know because I've done just that inside the DNSSEC-Check application, which is also part of the DNSSEC-Tools project.

Upvotes: 1

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