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
