IOS零碎技术整理（3）－获取wifi列表

1.   该功能实现基于MobileApple80211框架来进行开发，而目前该框架成为了私有框架，其中的API均为私有API。

如果使用这些API可能导致应用不能上app store或者ios版本升级过程中，可能对私有api不兼容，导致程序莫名的挂掉或数据获取失败

2.   终端必须越狱，且必须把程序部署到终端的/Applications目录下取得超级用户权限才能获得wifi的访问权限

代码

#import <Foundation/Foundation.h>

#import <CoreFoundation/CoreFoundation.h>

#include <dlfcn.h>

@interface SOLStumbler : NSObject {

NSMutableDictionary *networks; //Key: MAC Address (BSSID)

void *libHandle;

void *airportHandle;

int (*apple80211Open)(void *);

int (*apple80211Bind)(void *, NSString *);

int (*apple80211Close)(void *);

int (*associate)(void *, NSDictionary*, NSString*);

int (*apple80211Scan)(void *, NSArray **, void *);

}

- (NSDictionary *)networks;                                                             //returns all 802.11 scanned network(s)

- (NSDictionary *)network:(NSString *) BSSID;                   //return specific 802.11 network by BSSID (MAC Address)

- (void)scanNetworks;

- (int)numberOfNetworks;

@end

#import "SOLStumbler.h"

@implementation SOLStumbler

- (id)init

{

self = [super init];

networks = [[NSMutableDictionary alloc] init];

libHandle = dlopen("/System/Library/SystemConfiguration/IPConfiguration.bundle/IPConfiguration", RTLD_LAZY);

char *error;

if (libHandle == NULL && (error = dlerror()) != NULL)  {

NSLog(@">>>  error %s",error);

exit(1);

}

apple80211Open = dlsym(libHandle, "Apple80211Open");

apple80211Bind = dlsym(libHandle, "Apple80211BindToInterface");

apple80211Close = dlsym(libHandle, "Apple80211Close");

apple80211Scan = dlsym(libHandle, "Apple80211Scan");

apple80211Open(&airportHandle);

apple80211Bind(airportHandle, @"en0");

return self;

}

- (NSDictionary *)network:(NSString *) BSSID

{

return [networks objectForKey:@"BSSID"];

}

- (NSDictionary *)networks

{

return networks;

}

- (void)scanNetworks

{

NSLog(@"Scanning WiFi Channels...");

NSDictionary *parameters = [[NSDictionary alloc] init];

NSArray *scan_networks; //is a CFArrayRef of CFDictionaryRef(s) containing key/value data on each discovered network

apple80211Scan(airportHandle, &scan_networks, parameters);

NSLog(@"===-scan_networks-======%@",scan_networks);

for (int i = 0; i < [scan_networks count]; i++) {

[networks setObject:[scan_networks objectAtIndex: i] forKey:[[scan_networks objectAtIndex: i] objectForKey:@"BSSID"]];

}

NSLog(@"Scanning WiFi Channels Finished.");

}

- (int)numberOfNetworks

{

return [networks count];

}

- ( NSString * ) description {

NSMutableString *result = [[NSMutableString alloc] initWithString:@"Networks State: \n"];

for (id key in networks){

[result appendString:[NSString stringWithFormat:@"%@ (MAC: %@), RSSI: %@, Channel: %@ \n",

[[networks objectForKey: key] objectForKey:@"SSID_STR"], //Station Name

key, //Station BBSID (MAC Address)

[[networks objectForKey: key] objectForKey:@"RSSI"], //Signal Strength

[[networks objectForKey: key] objectForKey:@"CHANNEL"]  //Operating Channel

]];

}

return [NSString stringWithString:result];

}

- (void) dealloc {

apple80211Close(airportHandle);

[super dealloc];

}

@end