Le 2 juil. 2010 à 19:33, Jens Alfke a écrit : > > On Jul 1, 2010, at 7:42 PM, Michael Jackson wrote: > >> Is there any way to bypass the system network preferences for DNS >> servers to perform all DNS lookups from within a Cocoa app? For >> example, I would like my app to always make DNS queries to a >> particular pair of DNS servers. > > I’m pretty sure that’s not directly possible, since DNS lookups are done by a > shared daemon process, not by individual apps. > > What you could do is incorporate direct DNS-lookup code into your app (I’m > sure there are open-source libraries for it), use that to resolve the > hostname to an IP address, and then use that IP address with your favorite > networking APIs instead of the hostname. (If you’re using NSURLConnection, > you’d need to transform the raw address into dotted-quad form, or the > equivalent for IPv6.)
FWIW, dig can do that, as you can specify a server when you use it to test DNS query: http://www.opensource.apple.com/source/bind9/bind9-31/bind9/bin/dig/ -- Jean-Daniel _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
