Commit Graph

2 Commits (3c333f6341c61447fecfb2e6d85fbd6764fd1e0b)

Author SHA1 Message Date
Andrew Dunham 5902d51ba4 util/race: add test to confirm we don't leak goroutines
Updates #cleanup

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Iff147268db50251d498fff5213adb8d4b8c999d4
10 months ago
Andrew Dunham 286c6ce27c
net/dns/resolver: race UDP and TCP queries (#9544)
Instead of just falling back to making a TCP query to an upstream DNS
server when the UDP query returns a truncated query, also start a TCP
query in parallel with the UDP query after a given race timeout. This
ensures that if the upstream DNS server does not reply over UDP (or if
the response packet is blocked, or there's an error), we can still make
queries if the server replies to TCP queries.

This also adds a new package, util/race, to contain the logic required for
racing two different functions and returning the first non-error answer.

Updates tailscale/corp#14809

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I4311702016c1093b1beaa31b135da1def6d86316
10 months ago