mac-address

I'm developing a home security application. One thing I'd like to do is automatically turn it off and on based on whether or not I'm at home. I have a phone with Wifi that automatically connects to my network when I'm home. The phone connects and gets its address via DHCP. While I could configure it to use a static IP, I'd rather not. Is there any kind of 'Ping' or equivalent in C# / .Net that can take the MAC address of a device and tell me whether or not it's currently active on the network? Edit: To clarify, I'm running software on a PC that I'd like to have be able to detect the phone on

example: 12:45:ff:ab:aa:cd is valid 45:jj:jj:kk:ui>cd is not valid Daniel Gehriger The following code checks for valid MAC addresses (with or w/o the ":" separator): #include <ctype.h> int isValidMacAddress(const char* mac) { int i = 0; int s = 0; while (*mac) { if (isxdigit(*mac)) { i++; } else if (*mac == ':' || *mac == '-') { if (i == 0 || i / 2 - 1 != s) break; ++s; } else { s = -1; } ++mac; } return (i == 12 && (s == 5 || s == 0)); } The code checks the following: that the input string mac contains exactly 12 hexadecimal digits. that, if a separator colon : appears in the input string, it

Hi i'm using this method for get the mac address public string GetMACAddress() { System.Management.ManagementClass mc = default(System.Management.ManagementClass); ManagementObject mo = default(ManagementObject); mc = new ManagementClass("Win32_NetworkAdapterConfiguration"); ManagementObjectCollection moc = mc.GetInstances(); foreach (var mo in moc) { if (mo.Item("IPEnabled") == true) { return mo.Item("MacAddress").ToString(); }else return null; } } but i receive this error Compiler Error Message: CS0234: The type or namespace name 'ManagementClass' does not exist in the namespace 'System

Is there any function that gets the user's MAC address so I can record it as some authentication credential? No. Once you involve a layer 3 router, the original MAC address is no longer available / relevant. 来源： https://stackoverflow.com/questions/17516669/is-it-possible-to-get-the-visitors-mac-address-in-rails

I am new to Mac OS X and X code and want to know how to find the MAC address of a machine programmatically in OS X. Pedro d'Aquino There's a sample from the Mac OS X Reference Library that gets the MAC address of the primary, built-in interface from the I/O Registry. It also includes an Xcode project. Kevin Sylvestre See: How can I programmatically get the MAC address of an iphone . Should work (although originally asked for iPhone). 来源： https://stackoverflow.com/questions/3442274/how-to-find-mac-address-in-mac-os-x-programmatically