dns_sd and double nat
dns_sd and double nat
- Subject: dns_sd and double nat
- From: Curtis Jones <email@hidden>
- Date: Tue, 27 Dec 2011 15:31:30 -0500
I've been researching this issue for a while and can't find a solution - I'm hoping someone here can help, or at least confirm my fate.
I need to perform port mapping (UPnP / NAT-PMP) from within a Cocoa application. I've found several open source libraries in addition to dns_sd that can accomplish this.
At the moment I'm not able to use dns_sd because it complains in double-nat'ed environments. I don't expect it to perform port mapping on the "outer" of the two NAT's; only the "closer" one; the default gateway. But because it detects the double-nat, it refuses to proceed. I'd really like to be able to tell it that I understand it's objections, but I'd really like it to proceed anyway.
I dug into the Bonjour source code and found the offending line of code, but unless I misunderstood, it looks nothing short of replacing mDNSResponder with a new build would resolve the issue - which isn't an acceptable course of action for me.
Is there any way to make Bonjour ignore its double-nat objections?
Left field here: would it be crazy to include an mDNSResponder build with the application? Can multiple instances run without bothering each other?
Thanks for your help.
--
Curtis Jones
email@hidden
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