Ios obtains the mac address

 

 

First of all, the following two methods can obtain the mac address of the mobile phone, but there is a limit that can be obtained only on iOS. After iOS7, Apple performed technical processing on sysctl and ioctl. the MAC address returns 02: 00: 00: 00: 00: 00. The "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 shocould migrate toidentifiers such as-[UIDevice identifierForVendor]. this change affects all apps running on iOS 7 ".

Therefore, the unique Mac address of the device cannot be obtained after iOS7 and can only be replaced by another one.

The following two methods are described:

You need to import several header files.

 

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1. # Include
2. # Include
3. # Include
   Method 1:

    

    

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   1. // Return the local MAC addy
   2. // Courtesy of FreeBSD hackers email list
   3. // Accidentally munged during previous update. Fixed thanks to mlamb.
   4. -(NSString *) macaddress
   5. {
   6.  
   7. Int mib [6];
   8. Size_t len;
   9. Char * buf;
   10. Unsigned char * ptr;
   11. Struct if_msghdr * ifm;
   12. Struct sockaddr_dl * sdl;
   13.  
   14. Mib [0] = CTL_NET;
   15. Mib [1] = AF_ROUTE;
   16. Mib [2] = 0;
   17. Mib [3] = AF_LINK;
   18. Mib [4] = NET_RT_IFLIST;
   19.  
   20. If (mib [5] = if_nametoindex (en0) = 0 ){
   21. Printf (Error: if_nametoindex error/n );
   22. Return NULL;
   23. }
   24.  
   25. If (sysctl (mib, 6, NULL, & len, NULL, 0) <0 ){
   26. Printf (Error: sysctl, take 1/n );
   27. Return NULL;
   28. }
   29.  
   30. If (buf = malloc (len) = NULL ){
   31. Printf (cocould not allocate memory. error! /N );
   32. Return NULL;
   33. }
   34.  
   35. If (sysctl (mib, 6, buf, & len, NULL, 0) <0 ){
   36. Printf (Error: sysctl, take 2 );
   37. Return NULL;
   38. }
   39.  
   40. Ifm = (struct if_msghdr *) buf;
   41. Sdl = (struct sockaddr_dl *) (ifm + 1 );
   42. Ptr = (unsigned char *) LLADDR (sdl );
   43. NSString * outstring = [NSString stringWithFormat: @ % 02x: % 02x: % 02x: % 02x: % 02x: % 02x, * ptr, * (ptr + 1 ), * (ptr + 2), * (ptr + 3), * (ptr + 4), * (ptr + 5)];
   44.  
   45. // NSString * outstring = [NSString stringWithFormat: @ % 02x % 02x % 02x % 02x % 02x % 02x, * ptr, * (ptr + 1 ), * (ptr + 2), * (ptr + 3), * (ptr + 4), * (ptr + 5)];
   46.  
   47. NSLog (@ outString: % @, outstring );
   48.  
   49. Free (buf );
   50.  
   51. Return [outstring uppercaseString];
   52. }
       From http://blog.csdn.net/showhilllee

        

       Method 2:

        

        

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       1. -(NSString *) getMacAddress
       2. {
       3. Int mgmtInfoBase [6];
       4. Char * msgBuffer = NULL;
       5. Size_t length;
       6. Unsigned char macAddress [6];
       7. Struct if_msghdr * interfaceMsgStruct;
       8. Struct sockaddr_dl * socketStruct;
       9. NSString * errorFlag = NULL;
       10.  
       11. // Setup the management Information Base (mib)
       12. MgmtInfoBase [0] = CTL_NET; // Request network subsystem
       13. MgmtInfoBase [1] = AF_ROUTE; // Routing table info
       14. MgmtInfoBase [2] = 0;
       15. MgmtInfoBase [3] = AF_LINK; // Request link layer information
       16. MgmtInfoBase [4] = NET_RT_IFLIST; // Request all configured interfaces
       17.  
       18. // With all configured interfaces requested, get handle index
       19. If (mgmtInfoBase [5] = if_nametoindex (en0) = 0)
       20. ErrorFlag = @ if_nametoindex failure;
       21. Else
       22. {
       23. // Get the size of the data available (store in len)
       24. If (sysctl (mgmtInfoBase, 6, NULL, & length, NULL, 0) <0)
       25. ErrorFlag = @ sysctl mgmtInfoBase failure;
       26. Else
       27. {
       28. // Alloc memory based on above call
       29. If (msgBuffer = malloc (length) = NULL)
       30. ErrorFlag = @ buffer allocation failure;
       31. Else
       32. {
       33. // Get system information, store in buffer
       34. If (sysctl (mgmtInfoBase, 6, msgBuffer, & length, NULL, 0) <0)
       35. ErrorFlag = @ sysctl msgBuffer failure;
       36. }
       37. }
       38. }
       39.  
       40. // Befor going any further...
       41. If (errorFlag! = NULL)
       42. {
       43. NSLog (@ Error: % @, errorFlag );
       44. Return errorFlag;
       45. }
       46.  
       47. // Map msgbuffer to interface message structure
       48. InterfaceMsgStruct = (struct if_msghdr *) msgBuffer;
       49.  
       50. // Map to link-level socket structure
       51. SocketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1 );
       52.  
       53. // Copy link layer address data in socket structure to an array
       54. Memcpy (& macAddress, socketStruct-> sdl_data + socketStruct-> sdl_nlen, 6 );
       55.  
       56. // Read from char array into a string object, into traditional Mac address format
       57. NSString * macAddressString = [NSString stringWithFormat: @ % 02x: % 02x: % 02x: % 02x: % 02x: % 02x: % 02x,
       58. MacAddress [0], macAddress [1], macAddress [2],
       59. MacAddress [3], macAddress [4], macAddress [5];
       60. NSLog (@ Mac Address: % @, macAddressString );
       61.  
       62. // Release the buffer memory
       63. Free (msgBuffer );
       64.  
       65. Return macAddressString;
       66. }