How to get the Mac address of your phone on iOS

First of all, let’s explain that the following two methods can obtain the mobile phone’s mac address, but there is a limitation, which can only be obtained below iOS7. After iOS7, Apple has carried out technical processing on sysctl and ioctl, and the MAC address returns 02:00:00:00:00:00:00:00:00.

The official document reads:

"Twolow-level networking APIs that used to return a MAC address now return thefixed value 02:00:00:00:00:00. The APIs in question are sysctl(NET_RT_IFLIST) and ioctl(SIOCGIFCONF). Developers using the value of the MAC address should migrate toidentifiers such as -[UIDevice identifierForVendor].This change affects all apps running on iOS 7”。

Therefore, after iOS7, you can no longer get the unique Mac address of the device, so you can only use other ones instead.
Here are two ways:
All need to import several header files

#include <sys/> 
#include <net/> 
#include <net/if_dl.h>

Method 1:

// Return the local MAC addy 
// Courtesy of FreeBSD hackers email list 
// Accidentally munged during previous update. Fixed thanks to mlamb. 
- (NSString *) macaddress 
{ 
   
  int         mib[6]; 
  size_t       len; 
  char        *buf; 
  unsigned char    *ptr; 
  struct if_msghdr  *ifm; 
  struct sockaddr_dl *sdl; 
   
  mib[0] = CTL_NET; 
  mib[1] = AF_ROUTE; 
  mib[2] = 0; 
  mib[3] = AF_LINK; 
  mib[4] = NET_RT_IFLIST; 
   
  if ((mib[5] = if_nametoindex("en0")) == 0) { 
    printf("Error: if_nametoindex error/n"); 
    return NULL; 
  } 
   
  if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) { 
    printf("Error: sysctl, take 1/n"); 
    return NULL; 
  } 
   
  if ((buf = malloc(len)) == NULL) { 
    printf("Could not allocate memory. error!/n"); 
    return NULL; 
  } 
   
  if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) { 
    printf("Error: sysctl, take 2"); 
    return NULL; 
  } 
   
  ifm = (struct if_msghdr *)buf; 
  sdl = (struct sockaddr_dl *)(ifm + 1); 
  ptr = (unsigned char *)LLADDR(sdl); 
  NSString *outstring = [NSString stringWithFormat:@"%02x:%02x:%02x:%02x:%02x:%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)]; 
   
//  NSString *outstring = [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)]; 
   
  NSLog(@"outString:%@", outstring); 
   
  free(buf); 
   
  return [outstring uppercaseString]; 
}

Method 2:

 - (NSString *)getMacAddress 
{ 
  int         mgmtInfoBase[6]; 
  char        *msgBuffer = NULL; 
  size_t       length; 
  unsigned char    macAddress[6]; 
  struct if_msghdr  *interfaceMsgStruct; 
  struct sockaddr_dl *socketStruct; 
  NSString      *errorFlag = NULL; 
   
  // Setup the management Information Base (mib) 
  mgmtInfoBase[0] = CTL_NET;    // Request network subsystem 
  mgmtInfoBase[1] = AF_ROUTE;    // Routing table info 
  mgmtInfoBase[2] = 0; 
  mgmtInfoBase[3] = AF_LINK;    // Request link layer information 
  mgmtInfoBase[4] = NET_RT_IFLIST; // Request all configured interfaces 
   
  // With all configured interfaces requested, get handle index 
  if ((mgmtInfoBase[5] = if_nametoindex("en0")) == 0) 
    errorFlag = @"if_nametoindex failure"; 
  else 
  { 
    // Get the size of the data available (store in len) 
    if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0) 
      errorFlag = @"sysctl mgmtInfoBase failure"; 
    else 
    { 
      // Alloc memory based on above call 
      if ((msgBuffer = malloc(length)) == NULL) 
        errorFlag = @"buffer allocation failure"; 
      else 
      { 
        // Get system information, store in buffer 
        if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0) 
          errorFlag = @"sysctl msgBuffer failure"; 
      } 
    } 
  } 
   
  // Befor going any further... 
  if (errorFlag != NULL) 
  { 
    NSLog(@"Error: %@", errorFlag); 
    return errorFlag; 
  } 
   
  // Map msgbuffer to interface message structure 
  interfaceMsgStruct = (struct if_msghdr *) msgBuffer; 
   
  // Map to link-level socket structure 
  socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1); 
   
  // Copy link layer address data in socket structure to an array 
  memcpy(&macAddress, socketStruct->sdl_data + socketStruct->sdl_nlen, 6); 
   
  // Read from char array into a string object, into traditional Mac address format 
  NSString *macAddressString = [NSString stringWithFormat:@"%02x:%02x:%02x:%02x:%02x:%02x", 
                 macAddress[0], macAddress[1], macAddress[2], 
                 macAddress[3], macAddress[4], macAddress[5]]; 
  NSLog(@"Mac Address: %@", macAddressString); 
   
  // Release the buffer memory 
  free(msgBuffer); 
   
  return macAddressString; 
}

The above are two ways to obtain the Mac address of your phone on iOS. I hope it will be helpful to everyone's learning.