问使用PyObjC更改DNS设置

EN

#!/usr/bin/env python

import  objc
from    SystemConfiguration import *

# Open dynamic store and get primary interface
store = SCDynamicStoreCreate(None, 'MyApp', None, None)
primaryif = SCDynamicStoreCopyValue(store, 'State:/Network/Global/IPv4')['PrimaryInterface']
if primaryif:
    print "Using %s as primary interface" % primaryif
else:
    raise "Can't find primary interface"

# Load SecurityInterface framework to provide SFAuthorization
objc.initFrameworkWrapper(
    frameworkName       = "SecurityInterface",
    frameworkIdentifier = "com.apple.securityinterface",
    frameworkPath       = objc.pathForFramework("/System/Library/Frameworks/SecurityInterface.framework"),
    globals             = globals()
)

# Access system preferences
preferences = SCPreferencesCreateWithAuthorization(None, 'MyApp', None, SFAuthorization.authorization().authorizationRef())

# Lock preferences
SCPreferencesLock(preferences, True)

# Get list of network services
networkSet = SCNetworkSetCopyCurrent(preferences)
networkSetServices = SCNetworkSetCopyServices(networkSet)

# Find the network service that belongs to the primary interface
for networkService in networkSetServices:
    interface = SCNetworkServiceGetInterface(networkService)
    if primaryif != SCNetworkInterfaceGetBSDName(interface):
        continue

    # Load currently configured DNS servers
    networkProtocol = SCNetworkServiceCopyProtocol(networkService, kSCNetworkProtocolTypeDNS)
    DNSDict = SCNetworkProtocolGetConfiguration(networkProtocol) or {}

    # Set new DNS servers
    DNSDict[kSCPropNetDNSServerAddresses] = [ '192.168.23.12', '8.8.4.4' ]
    SCNetworkProtocolSetConfiguration(networkService, DNSDict)

    # Unlock, commit and apply preferences
    print "UL", SCPreferencesUnlock(preferences)
    print "CO", SCPreferencesCommitChanges(preferences)
    print "AP", SCPreferencesApplyChanges(preferences)