site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com How about something like : prefs = SCPreferencesCreate(NULL, CFSTR("your app"), NULL); set = SCNetworkSetCopyCurrent(prefs); services = SCNetworkSetCopyServices(set); for (i = 0; i < CFArrayGetCount(services); i++) { service = CFArrayGetValueAtIndex(services, i); interface = SCNetworkServiceGetInterface(service); interfaceType = SCNetworkInterfaceGetInterfaceType(interface); if (CFEqual(interfaceType, kSCNetworkInterfaceTypeIEEE80211)) { serviceID = SCNetworkServiceGetServiceID(service); CFRetain(serviceID); // release "later" break; } } CFRelease(services); CFRelease(set); CFRelease(prefs); dict = SCDynamicStoreCopyDHCPInfo(store, serviceID); CFRelease(serviceID); ... and, of course, you'd add the appropriate error checks :-) - Allan On Feb 6, 2007, at 8:46 PM, Cotton Chen wrote: -- Cotton Chen _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Hi all, Recently I'd like to get the dhcp server's ip address who gives the ip to my airport. I used the APIs SCDynamicStoreCopyDHCPInfo, and DHCPInfoGetOptionData to accomplish my purpose. But, I cand only pass the NULL value as the serviceID to SCDynamicStoreCopyDHCPInfo because I don't know how to get the serviceID that belongs to airport. I also used scutil to get the informations about dhcp, I got the following of what I want. with ethernet cable connected: subKey [47] = State:/Network/Service/0/DHCP subKey [48] = State:/Network/Service/0/DNS subKey [49] = State:/Network/Service/0/IPv4 subKey [50] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/DHCP subKey [51] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/DNS subKey [52] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/IPv4 without ethernet cable connected: subKey [50] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/DHCP subKey [51] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/DNS subKey [52] = State:/Network/Service/ 606C990F-4091-4AC1-807F-86CC64EB7898/IPv4 as I passed the null value as serviceID to SCDynamicStoreCopyDHCPInfo without ethernet cable connected and turn on the airport interface, I got the correct dhcp server's ip because system had no choice to return me the one belongs to airport. But after I connected the ethernet cable on my computer, I always got the one that belongs to the ethernet interface. My question is, how to get the serviceID belongs to airport, for example the string "606C990F-4091-4AC1-807F-86CC64EB7898" that listed above. This email sent to site_archiver@lists.apple.com