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tailscale/net/netcheck
James Tucker b0f7b23efe net/netcheck: preserve live home DERP through packet loss
During a short period of packet loss, a TCP connection to the home DERP
may be maintained. If no other regions emerge as winners, such as when
all regions but one are avoided/disallowed as candidates, ensure that
the current home region, if still active, is not dropped as the
preferred region until it has failed two keepalives.

Relatedly apply avoid and no measure no home to ICMP and HTTP checks as
intended.

Updates tailscale/corp#12894
Updates tailscale/corp#29491

Signed-off-by: James Tucker <james@tailscale.com>
6 months ago
..
netcheck.go net/netcheck: preserve live home DERP through packet loss 6 months ago
netcheck_test.go net/netcheck: preserve live home DERP through packet loss 6 months ago
standalone.go net/netns, net/dns/resolver, etc: make netmon required in most places 2 years ago