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net/netmon: use Monitor's tsIfName if set by SetTailscaleInterfaceName

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Currently nobody calls SetTailscaleInterfaceName yet, so this is a
no-op. I checked oss, android, and the macOS/iOS client. Nobody calls
this, or ever did.

But I want to in the future.

Updates #15408
Updates #9040

Change-Id: I05dfabe505174f9067b929e91c6e0d8bc42628d7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-03-24 10:57:57 -07:00
committed by Brad Fitzpatrick
parent 156cd53e77
commit 14db99241f
5 changed files with 14 additions and 12 deletions
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6
ipn/ipnlocal/local.go
View File

@@ -4968,7 +4968,7 @@ func (b *LocalBackend) authReconfig() {
return
}
oneCGNATRoute := shouldUseOneCGNATRoute(b.logf, b.sys.ControlKnobs(), version.OS())
oneCGNATRoute := shouldUseOneCGNATRoute(b.logf, b.sys.NetMon.Get(), b.sys.ControlKnobs(), version.OS())
rcfg := b.routerConfig(cfg, prefs, oneCGNATRoute)
err = b.e.Reconfig(cfg, rcfg, dcfg)
@@ -4992,7 +4992,7 @@ func (b *LocalBackend) authReconfig() {
//
// The versionOS is a Tailscale-style version ("iOS", "macOS") and not
// a runtime.GOOS.
func shouldUseOneCGNATRoute(logf logger.Logf, controlKnobs *controlknobs.Knobs, versionOS string) bool {
func shouldUseOneCGNATRoute(logf logger.Logf, mon *netmon.Monitor, controlKnobs *controlknobs.Knobs, versionOS string) bool {
if controlKnobs != nil {
// Explicit enabling or disabling always take precedence.
if v, ok := controlKnobs.OneCGNAT.Load().Get(); ok {
@@ -5007,7 +5007,7 @@ func shouldUseOneCGNATRoute(logf logger.Logf, controlKnobs *controlknobs.Knobs,
// use fine-grained routes if another interfaces is also using the CGNAT
// IP range.
if versionOS == "macOS" {
hasCGNATInterface, err := netmon.HasCGNATInterface()
hasCGNATInterface, err := mon.HasCGNATInterface()
if err != nil {
logf("shouldUseOneCGNATRoute: Could not determine if any interfaces use CGNAT: %v", err)
return false

2
ipn/ipnlocal/peerapi.go
View File

@@ -481,7 +481,7 @@ func (h *peerAPIHandler) handleServeInterfaces(w http.ResponseWriter, r *http.Re
fmt.Fprintf(w, "<h3>Could not get the default route: %s</h3>\n", html.EscapeString(err.Error()))
}
if hasCGNATInterface, err := netmon.HasCGNATInterface(); hasCGNATInterface {
if hasCGNATInterface, err := h.ps.b.sys.NetMon.Get().HasCGNATInterface(); hasCGNATInterface {
fmt.Fprintln(w, "<p>There is another interface using the CGNAT range.</p>")
} else if err != nil {
fmt.Fprintf(w, "<p>Could not check for CGNAT interfaces: %s</p>\n", html.EscapeString(err.Error()))