Re: Switching Airport of in code using SCF

Is there any way I can force the interface down?

For AirPort, there should be two ways. First would be to power off the interface (and I'm not sure why you're code is not working). The second way would be to remove (or disable) any service that references the interface. You could do this with SCNetworkServiceSetEnabled(service, FALSE);

This is what I've done:

gPrefsRef = SCPreferencesCreate(nil, CFSTR("InterfaceConfig2"), nil);
if (gPrefsRef == nil)
errorAndExit("InterfaceConfig failure: SCPreferencesCreate failed");

if (!SCPreferencesLock(gPrefsRef, YES))
errorAndExit("InterfaceConfig failure: SCPreferencesLock could not get a lock");

NSEnumerator *e = [(NSArray *)SCNetworkSetCopyServices(SCNetworkSetCopyCurrent(gPrefsRef)) objectEnumerator];
SCNetworkServiceRef service;

while (service = (SCNetworkServiceRef)[e nextObject]) {
interfaceRef = SCNetworkServiceGetInterface(service);
if (isInterfaceOfType(interfaceRef, kSCNetworkInterfaceTypeIEEE80211)) {
CFDictionaryRef dict = (CFMutableDictionaryRef)[NSMutableDictionary dictionaryWithObjectsAndKeys:(NSString *)kSCValNetAirPortJoinModeAutomatic,
(NSString *)kSCPropNetAirPortJoinMode,
[NSNumber numberWithInt:0],
(NSString *)kSCPropNetAirPortPowerEnabled, nil];
if (SCNetworkInterfaceSetConfiguration(interfaceRef, dict) == NO) {
syslog(LOG_LOCAL7 | LOG_ALERT, "InterfaceConfig failure: Could not set Airport interface settings");
}
}
}

if (SCPreferencesCommitChanges(gPrefsRef) == NO)
errorAndExit("InterfaceConfig failure: SCPreferencesCommitChanges failed");
if (SCPreferencesApplyChanges(gPrefsRef) == NO)
errorAndExit("InterfaceConfig failure: SCPreferencesApplyChanges failed");

SCPreferencesUnlock(gPrefsRef);
CFRelease(gPrefsRef);
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References:
	>Re: Switching Airport of in code using SCF (From: Jonathan Guy <email@hidden>)