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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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1
tailcfg/tailcfg_test.go
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@@ -500,6 +500,7 @@ func TestNetInfoFields(t *testing.T) {
"MappingVariesByDestIP",
"HairPinning",
"WorkingIPv6",
"OSHasIPv6",
"WorkingUDP",
"HavePortMap",
"UPnP",