Getting IP address of VZVirtioNetworkDeviceConfiguration

Question

juliencrypt OP

Created Nov ’23

Replies 3

Boosts 0

Participants 3

Hello,

I am setting up a Linux virtual machine with Virtualization framework. It works fine. Here is how i am creating a network interface:

let network_device = VZVirtioNetworkDeviceConfiguration()
network_device.attachment = VZNATNetworkDeviceAttachment()
vm_config.networkDevices = [network_device]

As you can see, this is a NAT network. I would like to know the IP address assigned to this interface. macOS emulates a DHCP server and i would like to know the IP in my Xcode program.

How can i do that ?

Thanks

Boost

Answer 1

Engineer OP

Apple

Nov ’23

There is no API to know what IP address was assigned.

A method to get the IP has been to just have the guest report it back through a host-guest channel (serial, Virtio Socket, etc). Another way is to get the IP from ARP based on the MAC address.

0

Answer 2

juliencrypt OP

Nov ’23

Ok and is there a way to get the MAC address of the virtual machine from host program ? Thanks

0

Answer 3

teuf OP

Nov ’23

You should be able to use https://developer.apple.com/documentation/virtualization/vznetworkdeviceconfiguration/3656653-macaddress?language=objc to get the virtual machine mac address.

You can then parse /var/db/dhcpd_leases and lookup this mac address to find the IP which was assigned to the VM.

1