mDNSMacOSX/Scripts/network-isolate-device

#! /bin/bash
#
#	Copyright (c) 2024 Apple Inc. All rights reserved.
#
#	This script is for Apple Internal use only.
#

declare -r version=1.0
declare -r script=${BASH_SOURCE[0]}

#============================================================================================================================
#	PrintUsage
#============================================================================================================================

PrintUsage()
{
	echo ""
	echo "Attempts to disable Wi-Fi and Ethernet interfaces so that tests from mDNSResponder's presubmission test suite"
	echo "that are sensitive to network state changes and/or network activity can run without potential disruptions."
	echo ""
	echo "Usage: $( basename "${script}" ) [options]"
	echo ""
	echo "Options:"
	echo "    -V    Display version of this script and exit."
	echo ""
}

#============================================================================================================================
#	LogOut
#============================================================================================================================

LogOut()
{
	echo "$( date '+%Y-%m-%d %H:%M:%S%z' ): $*"
}

#============================================================================================================================
#	ErrQuit
#============================================================================================================================

ErrQuit()
{
	LogOut "error: $*"
	exit 1
}

#============================================================================================================================
#	main
#============================================================================================================================

main()
{
	while getopts ":hV" option; do
		case "${option}" in
			h)
				PrintUsage
				exit 0
				;;
			V)
				echo "$( basename "${script}" ) version ${version}"
				exit 0
				;;
			:)
				ErrQuit "option '${OPTARG}' requires an argument."
				;;
			*)
				ErrQuit "unknown option '${OPTARG}'."
				;;
		esac
	done
	# Check if the networksetup command, which is a macOS-only command, is available.
	if command -v networksetup &> /dev/null ; then
		# Turn off Wi-Fi.
		networksetup -setairportpower Wi-Fi off
		# Attempt to disable Ethernet network services if we're running in BATS, which sets BATS=1 in the environment,
		# and the Mac under test is connected to an NCM host, which means that the BATS test host is controlling the Mac
		# under test via NCM as opposed to Ethernet. If the BATS test host is controlling the Mac under test via
		# Ethernet, then disabling Ethernet would cause the BATS test host to lose control of the Mac under test.
		local disable_ethernet=false
		local -r ethernet_services=( 'Ethernet' 'Thunderbolt Ethernet' )
		if [ "${BATS}" == "1" ]; then
			local connected_to_ncm_host=false
			remotectl show ncm-host | grep -F -q 'State: connected'
			if [ $? -eq 0 ]; then
				connected_to_ncm_host=true
			fi
			if "${connected_to_ncm_host}"; then
				LogOut "Connected ncm-host was detected"
				networksetup -listallnetworkservices | grep -F -x -q -f <( printf '%s\n' "${ethernet_services[@]}" )
				if [ $? -eq 0 ]; then
					LogOut "Found Ethernet network services, will attempt to disable them"
					disable_ethernet=true
				else
					LogOut "No Ethernet network services were found"
				fi
			else
				LogOut "No connected ncm-host was detected, will not attempt to disable any Ethernet network services"
			fi
		fi
		if "${disable_ethernet}"; then
			local -r network_location=mDNSResponderTesting
			networksetup -listlocations | grep -F -x -q "${network_location}"
			if [ $? -eq 0 ]; then
				LogOut "Network location '${network_location}' already exists"
			else
				LogOut "Network location '${network_location}' doesn't exist, will attempt to create it"
				networksetup -createlocation "${network_location}" populate
				if [ $? -eq 0 ]; then
					LogOut "Created network location '${network_location}'"
				else
					ErrQuit "Failed to create network location"
				fi
			fi
			networksetup -switchtolocation "${network_location}" > /dev/null
			if [ $? -eq 0 ]; then
				LogOut "Switched to network location '${network_location}'"
			else
				ErrQuit "Failed to switch network location to '${network_location}'"
			fi
			for network_service in "${ethernet_services[@]}"; do
				networksetup -listallnetworkservices | grep -F -x -q "${network_service}"
				if [ $? -eq 0 ]; then
					networksetup -setnetworkserviceenabled "${network_service}" off
					if [ $? -eq 0 ]; then
						LogOut "Disabled network service '${network_service}'"
					else
						LogOut "Failed to disable network service '${network_service}'"
					fi
				fi
			done
		fi
	# Otherwise, check if the mobilewifitool command is available.
	elif command -v mobilewifitool &> /dev/null; then
		# Turn off Wi-Fi.
		mobilewifitool -- manager power 0
		if [ $? -eq 0 ]; then
			LogOut "Turned off Wi-Fi"
		else
			ErrQuit "Failed to turn off Wi-Fi"
		fi
	else
		LogOut "Neither networksetup nor mobilewifitool were available"
	fi
}

main "$@"