Difference between revisions of "MobileWiFi.framework"

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(Fix signal strength calculation and include the number of bars)
(More documentation!)
 
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}}
 
}}
  
'''MobileWiFi''' is the framework that manages WiFi functionality on iOS. It replaces the obsolete '''Apple80211''' framework.
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'''MobileWiFi''' is the framework that manages WiFi functionality on iOS. It powers [[WiFiPicker.servicebundle]], the Wi-Fi settings page and more. Its main purpose is to be a front-end to [[wifid]], which acquires its data directly from the kernel drivers. It replaces the obsolete '''Apple80211''' framework.
 +
 
 +
For examples on how to use this framework, see the [[#Example Code | Example Code]] section of this page.
  
 
* '''Note''': Your program needs the ''com.apple.wifi.manager-access'' entitlement to use '''any''' of the WiFiManager functions.
 
* '''Note''': Your program needs the ''com.apple.wifi.manager-access'' entitlement to use '''any''' of the WiFiManager functions.
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 +
= Example Code =
 +
 +
This section includes example code that uses this framework. For more in-depth examples, see the following open-source projects:
 +
* [https://github.com/Cykey/wifi WiFi]
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* [https://github.com/Cykey/airscan Airscan]
  
 
== Retrieving a list of known networks ==
 
== Retrieving a list of known networks ==
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CFRelease(networks);
 
CFRelease(networks);
 
</source>
 
</source>
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== Getting the WiFi signal strength ==
 
== Getting the WiFi signal strength ==
 
<source lang="c">
 
<source lang="c">
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WiFiManagerRef manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);
 
WiFiManagerRef manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);
CFArrayRef devices = WiFiManagerClientCopyDevices(_manager);
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CFArrayRef devices = WiFiManagerClientCopyDevices(manager);
  
 
WiFiDeviceClientRef client = (WiFiDeviceClientRef)CFArrayGetValueAtIndex(devices, 0);
 
WiFiDeviceClientRef client = (WiFiDeviceClientRef)CFArrayGetValueAtIndex(devices, 0);
CFDictionaryRef data = (CFDictionaryRef)WiFiDeviceClientCopyProperty(_device, CFSTR("RSSI"));
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CFDictionaryRef data = (CFDictionaryRef)WiFiDeviceClientCopyProperty(client, CFSTR("RSSI"));
CFNumberRef scaled = (CFNumberRef)WiFiDeviceClientCopyProperty(_device, kWiFiScaledRSSIKey);
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CFNumberRef scaled = (CFNumberRef)WiFiDeviceClientCopyProperty(client, kWiFiScaledRSSIKey);
  
 
CFNumberRef RSSI = (CFNumberRef)CFDictionaryGetValue(data, CFSTR("RSSI_CTL_AGR"));
 
CFNumberRef RSSI = (CFNumberRef)CFDictionaryGetValue(data, CFSTR("RSSI_CTL_AGR"));
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static void scan_callback(WiFiDeviceClientRef device, CFArrayRef results, CFErrorRef error, void *token);
 
static void scan_callback(WiFiDeviceClientRef device, CFArrayRef results, CFErrorRef error, void *token);
  
int main()
+
int main(int argc, char **argv)
 
{
 
{
 
_manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);
 
_manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);
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CFRunLoopRun();
 
CFRunLoopRun();
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 +
        return 0;
 
}
 
}
  

Latest revision as of 05:25, 13 July 2014

MobileWiFi.framework
Private Framework
Availabile 3.0 – present


MobileWiFi is the framework that manages WiFi functionality on iOS. It powers WiFiPicker.servicebundle, the Wi-Fi settings page and more. Its main purpose is to be a front-end to wifid, which acquires its data directly from the kernel drivers. It replaces the obsolete Apple80211 framework.

For examples on how to use this framework, see the Example Code section of this page.

  • Note: Your program needs the com.apple.wifi.manager-access entitlement to use any of the WiFiManager functions.

Example Code

This section includes example code that uses this framework. For more in-depth examples, see the following open-source projects:

Retrieving a list of known networks

#include <MobileWiFi.h>

WiFiManagerRef manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);

CFArrayRef networks = WiFiManagerClientCopyNetworks(manager);

NSLog(@"networks: %@", networks);

CFRelease(manager);
CFRelease(networks);

Getting the WiFi signal strength

#include <math.h>
#include <MobileWiFi.h>

WiFiManagerRef manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);
CFArrayRef devices = WiFiManagerClientCopyDevices(manager);

WiFiDeviceClientRef client = (WiFiDeviceClientRef)CFArrayGetValueAtIndex(devices, 0);
CFDictionaryRef data = (CFDictionaryRef)WiFiDeviceClientCopyProperty(client, CFSTR("RSSI"));
CFNumberRef scaled = (CFNumberRef)WiFiDeviceClientCopyProperty(client, kWiFiScaledRSSIKey);

CFNumberRef RSSI = (CFNumberRef)CFDictionaryGetValue(data, CFSTR("RSSI_CTL_AGR"));

int raw;
CFNumberGetValue(RSSI, kCFNumberIntType, &raw);

float strength;
CFNumberGetValue(scaled, kCFNumberFloatType, &strength);
CFRelease(scaled);

strength *= -1;

// Apple uses -3.0.
int bars = (int)ceilf(strength * -3.0f);
bars = MAX(1, MIN(bars, 3));


printf("WiFi signal strength: %d dBm\n\t Bars: %d\n", raw,  bars);

CFRelease(data);
CFRelease(scaled);
CFRelease(devices);
CFRelease(manager);

Scanning for nearby networks

#include <MobileWiFi.h>

static WiFiManagerRef _manager;
static void scan_callback(WiFiDeviceClientRef device, CFArrayRef results, CFErrorRef error, void *token);

int main(int argc, char **argv)
{
	_manager = WiFiManagerClientCreate(kCFAllocatorDefault, 0);

	CFArrayRef devices = WiFiManagerClientCopyDevices(_manager);
	if (!devices) {
		fprintf(stderr, "Couldn't get WiFi devices. Bailing.\n");
		exit(EXIT_FAILURE);
	}

	WiFiDeviceClientRef client = (WiFiDeviceClientRef)CFArrayGetValueAtIndex(devices, 0);

	WiFiManagerClientScheduleWithRunLoop(_manager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
	WiFiDeviceClientScanAsync(client, (CFDictionaryRef)[NSDictionary dictionary], scan_callback, 0);

	CFRelease(devices);

	CFRunLoopRun();

        return 0;
}

static void scan_callback(WiFiDeviceClientRef device, CFArrayRef results, CFErrorRef error, void *token)
{
	NSLog(@"Finished scanning! networks: %@", results);

	WiFiManagerClientUnscheduleFromRunLoop(_manager);
	CFRelease(_manager);

	CFRunLoopStop(CFRunLoopGetCurrent());
}

References