go-ios fails to connect to RSD on iOS 18

[linbossdegithub]

Here’s a concise English description you can post to the go-ios issue tracker:

I’m having trouble using go-ios (via Airtest) with an iOS 18.1.1 device.

Environment:

macOS: [your macOS version]
Xcode: [your Xcode version]
go-ios binary is being used as ios-darwin inside Airtest at:
/opt/homebrew/lib/python3.9/site-packages/airtest/core/ios/goios/mac/ios-darwin
Device: iPhone 15,4 – iOS 18.1.1
Python: 3.9
pymobiledevice3: works fine
Problem:

When I run:

/opt/homebrew/lib/python3.9/site-packages/airtest/core/ios/goios/mac/ios-darwin --udid=00008120-000C616211BBAXXX info
I get:

{"err":"NewWithAddrPortTUNDevice: failed to connect to device: ConnectToHttp2WithAddr: failed to dial: dial tcp [fd43:b7d4:c086::1]:51905: connect: operation timed out","level":"fatal","msg":"could not connect to RSD, host fd43:b7d4:c086::1, port 51905","time":"2026-02-28T16:10:13+08:00"}
At the same time, pymobiledevice3 can see the device without any issues:

sudo python3.9 -m pymobiledevice3 remote browse
Output:

{
"usb": [
{
"OSVersion": "18.1.1",
"ProductType": "iPhone15,4",
"UniqueDeviceID": "00008120-000C616211BBAXXX",
"address": "fe80::4895:1eff:fe01:e9a7%eXXX",
"port": 58783
}
],
"wifi": [
{
"address": "192.168.XXX.XXX",
"identifier": "00008120-000C616211BBAXXX",
"port": 49152
},
{
"address": "XXX.XXX.XXX.XXX",
"identifier": "00008120-000C616211BBAXXX",
"port": 49152
}
]
}
So USB connection, pairing, and lockdown seem OK, but go-ios fails to connect to RSD over HTTP/2 using an internal IPv6 address (fd43:…::1:51905) and times out.

Is this a known compatibility issue with iOS 18.x / RSD, or is there any recommended workaround or specific go-ios version/flags I should use to make info work with iOS 18.1.1?

[joao-borges]

I think this is the same problem as here #641

[danielpaulus]

joao-borges is right — this is the stale-tunnel class tracked in #641: the agent still holds a tunnel record pointing at a dead connection, so the RSD dial to the fd… address times out while lockdown/pymobiledevice3 still see the device fine. Fixes are in flight: #808 bounds those dials with a 15s timeout and #809 makes the tunnel agent probe liveness and recreate dead tunnels automatically. Also note Airtest vendors an old go-ios binary — worth retesting with a current release directly (ios tunnel start, then ios info). Closing as duplicate; follow #641 for the fix.

(part of an automated backlog sweep — comment or reopen if this got it wrong)