Coeur/Get iOS MAC address.m

## Get iOS MAC address.m
/* Original source code courtesy John from iOSDeveloperTips.com */

#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

+ (NSString *)getMacAddress
{
    int                 mgmtInfoBase[6];
    char                *msgBuffer = NULL;
    NSString            *errorFlag = NULL;
    size_t              length;

    // 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";
    // Get the size of the data available (store in len)
    else if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0)
        errorFlag = @"sysctl mgmtInfoBase failure";
    // Alloc memory based on above call
    else if ((msgBuffer = malloc(length)) == NULL)
        errorFlag = @"buffer allocation failure";
    // Get system information, store in buffer
    else if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0)
    {
        free(msgBuffer);
        errorFlag = @"sysctl msgBuffer failure";
    }
    else
    {
        // Map msgbuffer to interface message structure
        struct if_msghdr *interfaceMsgStruct = (struct if_msghdr *) msgBuffer;

        // Map to link-level socket structure
        struct sockaddr_dl *socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1);

        // Copy link layer address data in socket structure to an array
        unsigned char macAddress[6];
        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;
    }

    // Error...
    NSLog(@"Error: %@", errorFlag);

    return nil;
}
	/* Original source code courtesy John from iOSDeveloperTips.com */

	#include <sys/socket.h>
	#include <sys/sysctl.h>
	#include <net/if.h>
	#include <net/if_dl.h>

	+ (NSString *)getMacAddress
	{
	int mgmtInfoBase[6];
	char *msgBuffer = NULL;
	NSString *errorFlag = NULL;
	size_t length;

	// 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";
	// Get the size of the data available (store in len)
	else if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0)
	errorFlag = @"sysctl mgmtInfoBase failure";
	// Alloc memory based on above call
	else if ((msgBuffer = malloc(length)) == NULL)
	errorFlag = @"buffer allocation failure";
	// Get system information, store in buffer
	else if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0)
	{
	free(msgBuffer);
	errorFlag = @"sysctl msgBuffer failure";
	}
	else
	{
	// Map msgbuffer to interface message structure
	struct if_msghdr interfaceMsgStruct = (struct if_msghdr ) msgBuffer;

	// Map to link-level socket structure
	struct sockaddr_dl socketStruct = (struct sockaddr_dl ) (interfaceMsgStruct + 1);

	// Copy link layer address data in socket structure to an array
	unsigned char macAddress[6];
	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;
	}

	// Error...
	NSLog(@"Error: %@", errorFlag);

	return nil;
	}