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net/netcheck: test for OS IPv6 support as well as connectivity.

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This lets us distinguish "no IPv6 because the device's ISP doesn't
offer IPv6" from "IPv6 is unavailable/disabled in the OS".

Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson
2022-07-18 16:56:10 -07:00
committed by Dave Anderson
parent 4c0feba38e
commit c1cb3efbba
7 changed files with 26 additions and 3 deletions
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tailcfg/tailcfg_clone.go
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@@ -154,6 +154,7 @@ var _NetInfoCloneNeedsRegeneration = NetInfo(struct {
MappingVariesByDestIP opt.Bool
HairPinning opt.Bool
WorkingIPv6 opt.Bool
OSHasIPv6 opt.Bool
WorkingUDP opt.Bool
HavePortMap bool
UPnP opt.Bool