Get WiFi Info from private api

getWiFiInfo.m

@import SystemConfiguration;

#import <dlfcn.h>
#import <mach/port.h>
#import <mach/kern_return.h>

#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

#include <ifaddrs.h>
#include <arpa/inet.h>

@implementation UIDevice (detailInformation)

- (NSDictionary *)getWiFiInfo {
    NSMutableDictionary *wifiInfo = [NSMutableDictionary new];
    // base path: Root>J86AP>AppleARMPE>arm-io>AppleS5L8960XIO>usb-complex>AppleS5L8960XUSBArbitrator>usb-ehci1>AppleS5L8960XUSBEHCI>wlan>AppleBCMWLANBusInterfaceHSIC>AppleBCMWLANCore
    // to get wifi lqm
    // . :LinkQualityMetrics
    // to get wifi ssid and bssid
    // . > en0:IO80211(B)?SSID
    void *IOKit = dlopen("/System/Library/Frameworks/IOKit.framework/IOKit", RTLD_NOW);
    NSMutableDictionary *io80211 = nil;
    if (IOKit) {
        mach_port_t *kIOMasterPortDefault = dlsym(IOKit, "kIOMasterPortDefault");
        CFMutableDictionaryRef (*IOServiceMatching)(const char *name) = dlsym(IOKit, "IOServiceMatching");
        mach_port_t (*IOServiceGetMatchingService)(mach_port_t masterPort, CFDictionaryRef matching) = dlsym(IOKit, "IOServiceGetMatchingService");
        CFTypeRef (*IORegistryEntryCreateCFProperty)(mach_port_t entry, CFStringRef key, CFAllocatorRef allocator, uint32_t options) = dlsym(IOKit, "IORegistryEntryCreateCFProperty");
        kern_return_t (*IORegistryEntryCreateCFProperties)(mach_port_t entry, CFMutableDictionaryRef *properties, CFAllocatorRef allocator, uint32_t options) = dlsym(IOKit, "IORegistryEntryCreateCFProperties");
        kern_return_t (*IORegistryEntryGetChildIterator)(mach_port_t entry, const char plane[128], mach_port_t *iterator) = dlsym(IOKit, "IORegistryEntryGetChildIterator");
        kern_return_t (*IOIteratorNext)(kern_return_t iterator) = dlsym(IOKit, "IOIteratorNext");
        kern_return_t (*IORegistryEntryGetNameInPlane)(mach_port_t entry, const char plane[128], char name[128]) = dlsym(IOKit, "IORegistryEntryGetNameInPlane");
        kern_return_t (*IOObjectRelease)(mach_port_t object) = dlsym(IOKit, "IOObjectRelease");
        
        if (kIOMasterPortDefault && IOServiceGetMatchingService && IORegistryEntryCreateCFProperty && IOObjectRelease) {
            mach_port_t BCMWLANDevice = IOServiceGetMatchingService(*kIOMasterPortDefault, IOServiceMatching("AppleBCMWLANCore"));
            if (BCMWLANDevice) {
                CFMutableDictionaryRef properties = 0;
                kern_return_t IO80211 = KERN_SUCCESS;
                IO80211 = IORegistryEntryCreateCFProperties(BCMWLANDevice, &properties, kCFAllocatorDefault, 0);
                if (CFGetTypeID(properties) == CFDictionaryGetTypeID()) {
                    io80211 = [NSMutableDictionary dictionaryWithDictionary:(__bridge NSDictionary *)properties];
                    CFRelease(properties);
                }
                IOObjectRelease(IO80211);
                kern_return_t status = KERN_SUCCESS;
                mach_port_t children = 0;
                status = IORegistryEntryGetChildIterator(BCMWLANDevice, "IOService", &children);
                mach_port_t child = 0;
                mach_port_t childUpNext = 0;
                if (status == KERN_SUCCESS) {
                    childUpNext = IOIteratorNext(children);
                    while (childUpNext) {
                        child = childUpNext;
                        childUpNext = IOIteratorNext(children);
                        CFMutableDictionaryRef _properties = 0;
                        kern_return_t _IO80211 = KERN_SUCCESS;
                        _IO80211 = IORegistryEntryCreateCFProperties(child, &_properties, kCFAllocatorDefault, 0);
                        char title[128];
                        IORegistryEntryGetNameInPlane(child, "IOService", title);
                        if (CFGetTypeID(_properties) == CFDictionaryGetTypeID()) {
                            NSDictionary *value = [NSDictionary dictionaryWithDictionary:(__bridge NSDictionary *)_properties];
                            CFRelease(_properties);
                            [io80211 setValue:value
                                       forKey:[NSString stringWithCString:title
                                                                   encoding:NSUTF8StringEncoding]];
                        }
                        IOObjectRelease(_IO80211);
                        IOObjectRelease(child);
                    }
                    IOObjectRelease(children);
                }
                IOObjectRelease(BCMWLANDevice);
            }
        }
        dlclose(IOKit);
    }
    IOKit = nil;
    if (io80211 != nil) {
        NSArray *linkQualityMetrics = [[io80211 objectForKey:@"LinkQualityMetrics"] componentsSeparatedByString:@" "];
        for (NSString *linkQualityMetric in linkQualityMetrics) {
            if ([linkQualityMetric containsString:@"="]) {
                NSArray *lqm = [linkQualityMetric componentsSeparatedByString:@"="];
                [wifiInfo setValue:[lqm objectAtIndex:1]
                            forKey:[lqm objectAtIndex:0]];
            }
        }
        NSDictionary *en0 = [io80211 objectForKey:@"en0"];
        NSData *BSSIDData = [en0 objectForKey:@"IO80211BSSID"];
        const unsigned char *buffer = [BSSIDData bytes];
        NSMutableString *BSSID = [NSMutableString stringWithCapacity:[BSSIDData length] * 2];
        for (NSInteger i = 0; i < [BSSIDData length]; i++) {
            [BSSID appendFormat:@"%02lX", (unsigned long)buffer[i]];
        }
        BSSID = (NSMutableString *)[BSSID regexReplace:@"(\\w{2})(\\w{2})(\\w{2})(\\w{2})(\\w{2})(\\w{2})" WithTemplate:@"$1:$2:$3:$4:$5:$6"];
        [wifiInfo setValue:[en0 objectForKey:@"IO80211SSID"] forKey:@"SSID"];
        [wifiInfo setValue:[NSString stringWithString:BSSID] forKey:@"BSSID"];
        [wifiInfo setValue:[en0 objectForKey:@"IO80211Band"] forKey:@"Band"];
        [wifiInfo setValue:[en0 objectForKey:@"IO80211Channel"] forKey:@"Channel"];
        // following only support on iOS 9 and above
        [wifiInfo setValue:[en0 objectForKey:@"IO80211ChannelBandwidth"] forKey:@"ChannelBandwidth"];
        [wifiInfo setValue:[en0 objectForKey:@"IO80211ChannelFrequency"] forKey:@"ChannelFrequency"];
    }
    return [[NSDictionary alloc] initWithDictionary:wifiInfo];
}

@end