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net/dns,userspace: remove unused DNS paths, normalize query limit on iOS

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With https://github.com/tailscale/corp/commit/a42a594bb311686197b64d6389524920a2b07b2a, iOS uses netstack and
hence there are no longer any platforms which use the legacy MagicDNS path. As such, we remove it.

We also normalize the limit for max in-flight DNS queries on iOS (it was 64, now its 256 as per other platforms).
It was 64 for the sake of being cautious about memory, but now we have 50Mb (iOS-15 and greater) instead of 15Mb
so we have the spare headroom.

Signed-off-by: Tom DNetto <tom@tailscale.com>
This commit is contained in:
Tom DNetto
2023-01-05 11:27:17 -08:00
committed by Tom
parent 10eec37cd9
commit 673b3d8dbd
3 changed files with 8 additions and 163 deletions
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cmd/tailscaled/depaware.txt
+1 -1
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@@ -247,7 +247,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/net/tsaddr from tailscale.com/ipn+
tailscale.com/net/tsdial from tailscale.com/control/controlclient+
💣 tailscale.com/net/tshttpproxy from tailscale.com/control/controlclient+
tailscale.com/net/tstun from tailscale.com/net/dns+
tailscale.com/net/tstun from tailscale.com/cmd/tailscaled+
tailscale.com/net/wsconn from tailscale.com/control/controlhttp+
tailscale.com/paths from tailscale.com/ipn/ipnlocal+
💣 tailscale.com/portlist from tailscale.com/ipn/ipnlocal