IOS 擷取Mac地址

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#include <sys/socket.h>#include <sys/sysctl.h>#include <net/if.h>#include <net/if_dl.h>//mac address// Return the local MAC addy// Courtesy of FreeBSD hackers email list// Accidentally munged during previous update. Fixed thanks to erica sadun & mlamb.- (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;}

 

 

IOS 擷取Mac地址