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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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4
net/sockstats/sockstats.go
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@@ -109,8 +109,8 @@ func GetValidation() *ValidationSockStats {
// SetNetMon configures the sockstats package to monitor the active
// interface, so that per-interface stats can be collected.
func SetNetMon(lm *netmon.Monitor) {
setNetMon(lm)
func SetNetMon(netMon *netmon.Monitor) {
setNetMon(netMon)
}
// DebugInfo returns a string containing debug information about the tracked