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net/dns{,/resolver}: refactor DNS forwarder, send out of right link on macOS/iOS

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Fixes #2224
Fixes tailscale/corp#2045

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-06-22 21:53:43 -07:00
committed by Brad Fitzpatrick
parent 597fa3d3c3
commit 45e64f2e1a
10 changed files with 530 additions and 500 deletions
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6
net/dns/manager.go
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@@ -38,11 +38,11 @@ type Manager struct {
}
// NewManagers created a new manager from the given config.
func NewManager(logf logger.Logf, oscfg OSConfigurator, linkMon *monitor.Mon) *Manager {
func NewManager(logf logger.Logf, oscfg OSConfigurator, linkMon *monitor.Mon, linkSel resolver.ForwardLinkSelector) *Manager {
logf = logger.WithPrefix(logf, "dns: ")
m := &Manager{
logf: logf,
resolver: resolver.New(logf, linkMon),
resolver: resolver.New(logf, linkMon, linkSel),
os: oscfg,
}
m.logf("using %T", m.os)
@@ -207,7 +207,7 @@ func Cleanup(logf logger.Logf, interfaceName string) {
logf("creating dns cleanup: %v", err)
return
}
dns := NewManager(logf, oscfg, nil)
dns := NewManager(logf, oscfg, nil, nil)
if err := dns.Down(); err != nil {
logf("dns down: %v", err)
}