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all: avoid repeated default interface lookups

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On some platforms (notably macOS and iOS) we look up the default
interface to bind outgoing connections to. This is both duplicated
work and results in logspam when the default interface is not available
(i.e. when a phone has no connectivity, we log an error and thus cause
more things that we will try to upload and fail).

Fixed by passing around a netmon.Monitor to more places, so that we can
use its cached interface state.

Fixes #7850
Updates #7621

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita
2023-04-17 16:01:41 -07:00
committed by Mihai Parparita
parent 7f17e04a5a
commit 7330aa593e
50 changed files with 242 additions and 126 deletions
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2
cmd/derper/depaware.txt
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@@ -86,7 +86,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
💣 tailscale.com/net/interfaces from tailscale.com/net/netns+
tailscale.com/net/netaddr from tailscale.com/ipn+
tailscale.com/net/netknob from tailscale.com/net/netns
tailscale.com/net/netmon from tailscale.com/net/sockstats
tailscale.com/net/netmon from tailscale.com/net/sockstats+
tailscale.com/net/netns from tailscale.com/derp/derphttp
tailscale.com/net/netutil from tailscale.com/client/tailscale
tailscale.com/net/packet from tailscale.com/wgengine/filter