iOS开发-获取WIFI信息

#include <arpa/inet.h>
#include <netdb.h>
#include <net/if.h>
#include <ifaddrs.h>
#import <dlfcn.h>
#include <sys/socket.h>
#import <SystemConfiguration/CaptiveNetwork.h>

#pragma 获取本地IP
- (NSString *) localWiFiIPAddress
{
BOOL success;
struct ifaddrs * addrs;
const struct ifaddrs * cursor;

success = getifaddrs(&addrs) == 0;
if (success) {
cursor = addrs;
while (cursor != NULL) {
// the second test keeps from picking up the loopback address
if (cursor->ifa_addr->sa_family == AF_INET && (cursor->ifa_flags & IFF_LOOPBACK) == 0)
{
NSString *name = [NSString stringWithUTF8String:cursor->ifa_name];
if ([name isEqualToString:@"en0"])  // Wi-Fi adapter
return [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)cursor->ifa_addr)->sin_addr)];
}
cursor = cursor->ifa_next;
}
freeifaddrs(addrs);
}
return nil;
}

#pragma 获取WiFi SSID信息
- (NSDictionary *)getWIFIDic
{
CFArrayRef myArray = CNCopySupportedInterfaces();
if (myArray != nil) {
CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));
if (myDict != nil) {
NSDictionary *dic = (NSDictionary*)CFBridgingRelease(myDict);
return dic;
}
}
return nil;
}
#pragma 获取mac地址
- (NSString *)getBSSID
{
NSDictionary *dic = [self getWIFIDic];
if (dic == nil) {
return nil;
}
return dic[@"BSSID"];
}
- (NSString *)getSSID
{
NSDictionary *dic = [self getWIFIDic];
if (dic == nil) {
return nil;
}
return dic[@"SSID"];
}

{
BSSID = "6:14:4b:6w:5c:84";
SSID = minidao;
SSIDDATA = <51696e67 64616f42 414e4b>;
}

#pragma mark - 获取路由器地址
- (NSString *) routerIp {

NSString *address = @"error";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;

// retrieve the current interfaces - returns 0 on success
success = getifaddrs(&interfaces);
if (success == 0)
{
// Loop through linked list of interfaces
temp_addr = interfaces;
//*/
while(temp_addr != NULL)
/*/
int i=255;
while((i--)>0)
//*/
{
if(temp_addr->ifa_addr->sa_family == AF_INET)
{
// Check if interface is en0 which is the wifi connection on the iPhone
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"])
{
// Get NSString from C String //ifa_addr
//ifa->ifa_dstaddr is the broadcast address, which explains the "255's"
//                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)];

address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

//routerIP----192.168.1.255 广播地址
NSLog(@"broadcast address--%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_dstaddr)->sin_addr)]);
//--192.168.1.106 本机地址
NSLog(@"local device ip--%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)]);
//--255.255.255.0 子网掩码地址
NSLog(@"netmask--%@",[NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_netmask)->sin_addr)]);
//--en0 端口地址
NSLog(@"interface--%@",[NSString stringWithUTF8String:temp_addr->ifa_name]);

}

}

temp_addr = temp_addr->ifa_next;
}
}

// Free memory
freeifaddrs(interfaces);

in_addr_t i =inet_addr([address cStringUsingEncoding:NSUTF8StringEncoding]);
in_addr_t* x =&i;

unsigned char *s=getdefaultgateway(x);
NSString *ip=[NSString stringWithFormat:@"%d.%d.%d.%d",s[0],s[1],s[2],s[3]];
free(s);
return ip;
}