![]() It is important to find the correct device. Scroll down to find your network adapter note that many devices may be listed. Click on the + sign to the left of Network.Click on the + sign to the left of Components.For Windows 10: Click in search window and then type:.For Windows 7: Click the Start Menu and then select:Īll Programs > Accessories > System Tools > System Information then go to step 3.Look for your network adapter in the list and the physical address is the MAC number needed. In the black window that pops up type: getmac /v A crude but straightforward way to achieve this is to cast the whole array to an unsigned char*:Ĭonst unsigned char* mac=(unsigned char*)ifr.ifr_hwaddr.The MAC address is a number used by network adapters to uniquely identify themselves on a LAN a MAC address is a 12-digit hexadecimal string and looks something like: 00:A0:23:C9:12:FFĮasy way: Click the Start Menu and then select All Programs > Accessories > Command Prompt. It is presented by an array of char, which could be a signed type, so if you wish to interpret it in any way then it should first be converted to an unsigned representation. Having checked its type, the address can now be safely extracted from req.ifr_hwaddr.sa_data. Extract the hardware address from the ifreq structure Note that for some of these (such as ARPHRD_LOOPBACK) there is no hardware address as such. If (if_name_len, each beginning with the prefix ARPHRD_. Since this is a fixed-length buffer you should take care to ensure that the name does not cause an overrun: The ifreq structure should initially contain the name of the interface to be queried, which should be copied into the ifr_name field. The following header files will be needed:Ĭreate an ifreq structure for passing data in and out of ioctl Extract the hardware address from the ifreq structure.Check the type of the returned hardware address. ![]()
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