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Re: How quick does the reachability API respond?
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Re: How quick does the reachability API respond?


  • Subject: Re: How quick does the reachability API respond?
  • From: Jens Alfke <email@hidden>
  • Date: Mon, 22 Jul 2013 20:58:26 -0700


On Jul 22, 2013, at 5:29 PM, Rick Mann <email@hidden> wrote:

Is it polling infrequently? Is there a way to give it a kick when my app is activated to have that happen sooner?

I don’t think it polls. Reachability just watches the IP routing tables to see whether there is a route from localhost to the desired address. Generally the answer is “yes” if you’re connected to any sort of router/base-station/switch, and “no” only if you’re completely disconnected. Polling would imply that it actually tries to send packets to the target address, which it definitely doesn’t do.

—Jens
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 >How quick does the reachability API respond? (From: Rick Mann <email@hidden>)

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