Getting DNS server IP on IPhone

Question

I\'m trying to get the my dns server IP using using libresolv framework , but all I get is \"0.0.0.0\"

-(void) getDns
{
    res_init();

    for         


        

Answer 1

Try below code to get DNS Server Address . Don't forget to link libresolv.lib

    #include 
    #include 
    #include 
    #include 

    - (NSString *) getDNSServers
    {
    // dont forget to link libresolv.lib
    NSMutableString *addresses = [[NSMutableString alloc]initWithString:@"DNS Addresses \n"];

    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)];
            [addresses appendFormat:@"%@\n",s];
            NSLog(@"%@",s);
        }
    }
    else
        [addresses appendString:@" res_init result != 0"];

    return addresses;
}