On 16/05/17 21:34, Nathan of Guardian wrote: > > > On Tue, Apr 11, 2017, at 02:39 PM, Kevin Gallagher wrote: >> Please forgive me if this is not the correct place for this question. I >> was wondering if Orbot checked for network connectivity every time it >> attempts to build a Tor circuit or poll entry nodes. > > Orbot does put the Tor daemon to sleep when there is no network > connectivity. This is a Tor Control Port feature that was added > specifically for Orbot/mobile devices.
We recently noticed that if Android fails to detect a loss of network connectivity (for example, if a wifi router is disconnected from the internet), Tor will repeatedly try and fail to connect to guard nodes as Kevin suggested. The behaviour seems to be device-specific, perhaps because devices differ as to whether and how quickly they detect connectivity losses. As a workaround, we're considering counting guard connection failure events and setting DisableNetwork 1 until the next connectivity event if the failures exceed some threshold. Here's the ticket: https://code.briarproject.org/akwizgran/briar/issues/950 Cheers, Michael
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