从iphone设置中获取DNS服务器IP [英] Get DNS server IP from iphone settings

问题描述

我试图找到一种方法来获取我的 DNS 服务器 IP，它出现在设置->wi-fi->详细信息->DNS 下.我不知道苹果是否允许以编程方式获取此信息.

I try to find a way how to get my DNS server ip which appear under settings->wi-fi->details->DNS. I don't know if apple allow to get this info programmatically.

推荐答案

我在 OS X 上使用了这个并为我工作，(也链接到 ibresolv.dylib)

I used this on OS X and worked for me, (link to ibresolv.dylib as well)

#include <arpa/inet.h>
#include <ifaddrs.h>
#include <resolv.h>
#include <dns.h>

- (NSString *) getDNSAddressesStr 
{
    NSMutableString *addressStr = [[NSMutableString alloc]initWithString:@"DNS Addresses 
"];

    res_state res = malloc(sizeof(struct __res_state));

    int result = res_ninit(res);

    if ( result == 0 )
    {    
        for ( int i = 0; i < res->nscount; i++ )
        {
            NSString *s = [NSString stringWithUTF8String :  inet_ntoa(res->nsaddr_list[i].sin_addr)];
            [addressStr appendFormat:@"%@
",s];
            NSLog(@"%@",s);
        }
    }
    else 
        [addressStr appendString:@" res_init result != 0"];

    return addressStr;
    }
}

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