IOS开发之判断IPHONE连接的网络（WIFI,2G,3G,4G）是IPV4还是IPV6网络

最新推荐文章于 2022-07-22 19:16:00 发布

zhanglizhi111

最新推荐文章于 2022-07-22 19:16:00 发布

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分类专栏： ipv6

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转自:

http://blog.youkuaiyun.com/qq_15509071/article/details/54632811

可能问题太简单了，在网上没有找到答案，只好我自己写了。

由于苹果审核我们的应用在ipv6环境下，无法连接到服务器。所以把原来的用IP作为请求网址改成了域名来发请求。虽然审核过了，但是在国内还有域名解析的问题，使用域名有可能没有解析到ip地址，有可能解析的ip地址不正确（可能域名转发引起的，域名转发已经被国家禁止）。

所以我想如果手机当前连接的ipv4的网络，还用原来的ip请求。如果手机连接的是ipv6网络，则使用域名连接。

下面我对不同的设备分别使用ipv4(wifi,4G)和ipv6(wifi)网络进行测试：

	IPV4	IPV6
IPAD（WIFI）	en0/ipv4 = 192.168.2.90, lo0/ipv6 = fe80::1, awdl0/ipv6 = fe80::5cbf:1aff:fe4e:ef38, en0/ipv6 = fe80::ae:8811:f45b:198a, lo0/ipv4 = 127.0.0.1	en0/ipv4 = 169.254.229.160, lo0/ipv6 = fe80::1, awdl0/ipv6 = fe80::5cbf:1aff:fe4e:ef38, en0/ipv6 = 2001:2::aab1:6005:dcd1:6ffd:63e4, lo0/ipv4 = 127.0.0.1
IPHONE6（WIFI）	en0/ipv4 = 192.168.8.110, lo0/ipv6 = fe80::1, awdl0/ipv6 = fe80::b84d:41ff:fe6e:2925, en0/ipv6 = fe80::435:13b1:816c:9db9, lo0/ipv4 = 127.0.0.1	en0/ipv4 = 169.254.87.24, lo0/ipv6 = fe80::1, awdl0/ipv6 = fe80::b84d:41ff:fe6e:2925, en0/ipv6 = 2001:2::aab1:b19e:527a:45d3:9f, lo0/ipv4 = 127.0.0.1
IPHONE6S（WIFI）	en0/ipv4 = 192.168.2.94, lo0/ipv6 = fe80::1, awdl0/ipv6 = fe80::a0ff:ddff:fec0:a676, en0/ipv6 = fe80::444:d26c:1b78:8f89, lo0/ipv4 = 127.0.0.1, utun0/ipv6 = fe80::3213:2aa4:9fed:9339
IPHONE6PLUS (4G)	lo0/ipv6 = fe80::1, pdp_ip0/ipv4 = 10.241.179.135, lo0/ipv4 = 127.0.0.1, utun0/ipv6 = fe80::e7dd:8eef:da5e:f8f7
IPHONE4（WIFI）	lo0/ipv4 = 127.0.0.1, en0/ipv4 = 192.168.2.138, lo0/ipv6 = fe80::1, en0/ipv6 = fe80::1420:27e5:d334:e8de	lo0/ipv4 = 127.0.0.1, en0/ipv4 = 169.254.120.241, lo0/ipv6 = fe80::1, en0/ipv6 = 2001:2::aab1:509d:9f42:38e0:a945

经过分析发现：

1.lo0/ipv6 = fe80::1,这个是固定的

2.lo0/ipv4 = 127.0.0.1 这个也是固定的

3.ipv6下 en0/ipv4 = 169.254.120.241,是固定的

4.ipv4下：awdl0/ipv6，en0/ipv6，utun0/ipv6对应的值都是fe80 开头

结论：在ipv6下，awdl0/ipv6，en0/ipv6，utun0/ipv6对应的值肯定有一个不是以fe80 开头

还有好多情况没有考虑eg:VPN

下面开始写代码来判断：

导入头文件和宏定义

[objc]view plaincopy 
   
 #define IOS_CELLULAR    @"pdp_ip0"  
 #define IOS_WIFI        @"en0"  
 #define IOS_VPN         @"utun0"  
 #define IP_ADDR_IPv4    @"ipv4"  
 #define IP_ADDR_IPv6    @"ipv6"  
 #import <ifaddrs.h>  
 #import <arpa/inet.h>  
 #import <net/if.h>  

添加两个方法

[objc]view plaincopy 
   
 + (BOOL)isIpv6{  
     NSArray *searchArray =  
     @[ IOS_VPN @"/" IP_ADDR_IPv6,  
        IOS_VPN @"/" IP_ADDR_IPv4,  
        IOS_WIFI @"/" IP_ADDR_IPv6,  
        IOS_WIFI @"/" IP_ADDR_IPv4,  
        IOS_CELLULAR @"/" IP_ADDR_IPv6,  
        IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;  
       
     NSDictionary *addresses = [self getIPAddresses];  
     NSLog(@"addresses: %@", addresses);  
       
     __block BOOL isIpv6 = NO;  
     [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOLBOOL *stop)  
      {  
            
          NSLog(@"---%@---%@---",key, addresses[key] );  
            
          if ([key rangeOfString:@"ipv6"].length > 0  && ![[NSString stringWithFormat:@"%@",addresses[key]] hasPrefix:@"(null)"] ) {  
                
              if ( ![addresses[key] hasPrefix:@"fe80"]) {  
                  isIpv6 = YES;  
              }  
          }  
            
       } ];  
       
     return isIpv6;  
 }  
   
   
 + (NSDictionary *)getIPAddresses  
 {  
     NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];  
     // retrieve the current interfaces - returns 0 on success  
     struct ifaddrs *interfaces;  
     if(!getifaddrs(&interfaces)) {  
         // Loop through linked list of interfaces  
         struct ifaddrs *interface;  
         for(interface=interfaces; interface; interface=interface->ifa_next) {  
             if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {  
                 continue; // deeply nested code harder to read  
             }  
             const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;  
             char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];  
             if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {  
                 NSString *name = [NSString stringWithUTF8String:interface->ifa_name];  
                 NSString *type;  
                 if(addr->sin_family == AF_INET) {  
                     if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {  
                         type = IP_ADDR_IPv4;  
                           
                         NSLog(@"ipv4 %@",name);  
                     }  
                 } else {  
                     const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;  
                     if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {  
                         type = IP_ADDR_IPv6;  
                         NSLog(@"ipv6 %@",name);  
                           
                     }  
                 }  
                 if(type) {  
                     NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];  
                     addresses[key] = [NSString stringWithUTF8String:addrBuf];  
                 }  
             }  
         }  
         // Free memory  
         freeifaddrs(interfaces);  
     }  
     return [addresses count] ? addresses : nil;  
 }  

调用

[objc]view plaincopy 
   
 - (void)viewDidLoad {  
     [super viewDidLoad];  
   
     //1:是ipv6  
     //0:不是ipv6  
     NSLog(@"###-###%d",[ViewController isIpv6]);  ;  
       
     if ([ViewController isIpv6] == YES) {  
         UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"是ipv6" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil nil];  
         [alertView show];  
       
     }else{  
         UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"不是ipv6" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil nil];  
         [alertView show];  
     }  
       
   
   
 }  