Hi Team,
I am utilizing the nw_parameters_create_secure_tcp in Objective-C to establish a TCP connection. However, I would like the connection to go through a specific utun interface.
I attempted to use the following method for binding:
nw_parameters_require_interface(nw_parameters_t parameters,
_Nullable nw_interface_t interface);
Unfortunately, I haven't found any API that can convert a utun interface name or index to an nw_interface_t object. Both nw_interface_create_with_index and nw_interface_create_with_name are private methods.
I also tried using nw_path_monitor_set_update_handler and nw_path_enumerate_interfaces, but they did not return the utun interface.
Could you please suggest how I can obtain the utun interface as an nw_interface_t?
Could you please suggest how I can obtain the
utuninterface as annw_interface_t?
I don’t know of any supported way to do this in the C API )-: [1]
Given that you know the address of your interface, could you attack this problem by binding the connection’s local endpont to that address (using nw_parameters_set_local_endpoint).
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
[1] With the Swift API you can use the following trick:
let ep = NWEndpoint.hostPort(host: "::1%en0", port: 12345)
guard let interface = ep.interface else { … handle failure … }
… use `interface` …
The same trick doesn’t work in the C API because there’s no nw_endpoint_copy_interface API.