ping: comment

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Philip Monk 2019-12-02 01:28:08 -08:00
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@ -1,9 +1,11 @@
:: Ping our sponsorship tree regularly for routing.
::
:: To traverse NAT, we need the response to come back from someone
:: we've sent a message to. We ping our sponsor so that they know
:: where we are. However, we also need to ping our galaxy because if
:: the other ship tries to respond directly, it may be blocked by our
:: firewall or NAT. Thus, the response must come from a ship we've
:: messaged direclty, and the only one we can guarantee is our galaxy.
:: messaged directly, and the only one we can guarantee is our galaxy.
:: Note this issue manifests itself even for bootstrapping a planet to
:: talk to its own star.
::