4 Commits

Author	SHA1	Message	Date
Josh Bleecher Snyder	6e8328cba5	wgengine/tsdns: replace connections when net link changes (macOS) ... When the network link changes, existing UDP sockets fail immediately and permanently on macOS. The forwarder set up a single UDP conn and never changed it. As a result, any time there was a network link change, all forwarded DNS queries failed. To fix this, create a new connection when send requests fail because of network unreachability. This change is darwin-only, although extended it to other platforms should be straightforward. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	2020-09-24 15:31:27 -07:00
Dmytro Shynkevych	aa1da24f18	tsdns: remove now unused fields. ... Missed in 7541982635. Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	2020-08-27 03:21:36 -04:00
Dmytro Shynkevych	7541982635	tsdns: remove forwarding queue. ... Two levels of queueing are unnecessary. The resulting implementation performs as follows under request bursts (`count` packets sent concurrently): lost count avg latency 0 / 256 (00.00%) - 28ms 0 / 512 (00.00%) - 146ms 0 / 768 (00.00%) - 166ms 0 / 1024 (00.00%) - 416ms 11 / 1280 (00.86%) - 430ms 145 / 1536 (09.44%) - 715ms 364 / 2048 (17.77%) - 836ms Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>	2020-08-27 03:18:17 -04:00
Dmytro Shynkevych	1af70e2468	tsdns: delegate requests asynchronously (#687) ... Signed-Off-By: Dmytro Shynkevych <dmytro@tailscale.com>	2020-08-19 15:39:25 -04:00