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disable native network configuration for already-open TUN devices on mobile platforms

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Owen
2026-08-07 16:04:28 -04:00
parent d21b7591c4
commit 6507cb6805
1 changed files with 11 additions and 0 deletions
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11
olm/connect.go
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@@ -74,6 +74,17 @@ func (o *Olm) handleConnect(msg websocket.WSMessage) {
return
}
// When handed an already-open FD (mobile/NetworkExtension platforms), the
// TUN device's addresses and routes are owned and reconciled by the host
// platform from NetworkSettings (e.g. Apple's NEPacketTunnelProvider via
// setTunnelNetworkSettings) - our own ifconfig/route subprocess calls must
// not also run against the same interface, or the two end up installing
// competing routes to the same destination. On macOS specifically this
// package's darwin code paths would otherwise run for real here (the NE
// build shares GOOS=darwin with the CLI), unlike iOS where they're already
// no-ops via a GOOS check.
network.NativeConfigDisabled = o.tunnelConfig.FileDescriptorTun != 0
o.tdev, err = func() (tun.Device, error) {
if o.tunnelConfig.FileDescriptorTun != 0 {
return olmDevice.CreateTUNFromFD(o.tunnelConfig.FileDescriptorTun, o.tunnelConfig.MTU)