iOS开发-获取WIFI信息

最新推荐文章于 2021-02-20 17:09:03 发布

原创最新推荐文章于 2021-02-20 17:09:03 发布 · 1.1k 阅读

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文章标签：

#ios #WiFi信息 #SSID #路由IP

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本文介绍了一种在iOS设备上获取网络信息的方法，包括本地IP地址、WiFi SSID、BSSID及路由器IP等关键信息。

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添加如下头文件，都是与网络库相关的。

#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>

获取本地IP

#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;
}

获取WiFi SSID具体信息：

#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"];
}

SSID信息如下：

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

获取路由IP：

#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;
}