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conncheck: send keepalive for candidates until connected state

Fabrice Bellet requested to merge bellet/libnice:debug-improve-keepalive-messages into master

  • This patch updates the state of the connection check when we stop sending keepalive messages to keep all local host udp candidates alive, for sending keepalive only for the selected pair instead. It seems that the selected pair is established when the state moves to "connected". State "ready" happens a bit later, when all other candidates pairs have been tested. (RFC 8445, section 11. "Keepalives")

  • This patch also improves the debug messages related to keepalives, by displaying which address:port and which stream/component are concerned.

Edited by Olivier Crête

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