Wakeonlan wifi how to#
Wakeonlan wifi mac#

Wake-on-LAN (sometimes abbreviated WoL) is an industry-standard protocol for waking computers up from a very low power mode remotely.

Wakeonlan wifi how to#

RELATED: How to Enable Wake-on-LAN in Windows 10 and 11 What Is Wake-on-LAN? Here’s how to enable Wake-on-LAN in Windows 11 and 10. Update, 11/18/21: Wake-on-LAN might be an old-school trick for turning on computers remotely, but it still works. Wake-on-LAN (WoL) has been around for a while, so let’s see how it works and how we can enable it. Last but not least, I will just remind you, that the first problem can be divided into some smaller packets but as far as I could see these problems are all capped by the links you provided.Technology often yields ridiculous conveniences, like being able to turn on your computer from miles away without pushing the power button. Due to the fact, that a WOL packet is always a broadcast packet (dest-ip 255.255.255.255) it won't leave your local network and will always be dropped from router, gateways or any other bridge between to networks (e.g. to allow such a packet and let it flow from sender to receiver. It is a pure network problem, where you have to configure your router, gateways, ids-systems, etc. The third problem can't also be solved by C#. This can't be programmed, due to the fact that every network adapter has another implementation of that function and how it can be enabled. Just open the device manager and take a look into the properties of your network adapter, if such an option exists and if you can enable it. The second one is something you can only achieve by configuring your network adapter. Using UdpClient client = new(new IPEndPoint(localIpAddress, 0)) Īwait client.SendAsync(magicPacket, magicPacket.Length, new IPEndPoint(multicastIpAddress, 9)) įor the WOL problem you have to clarify three problems to get it to work:Īs you already found on the net there are existing several solutions for the first problem programmed in C# (and after skimming your links, I would start with the first one). Static async Task SendWakeOnLan(IPAddress localIpAddress, IPAddress multicastIpAddress, byte magicPacket) IEnumerable data = Enumerable.Repeat(macBytes, 16).SelectMany(m => m) // then 16 times MacAddress IEnumerable header = Enumerable.Repeat((byte)0xff, 6) //First 6 times 0xff UnicastIPAddressInformation? unicastIPAddressInformation = ((u) =>īyte macBytes = Convert.FromHexString(macAddress) MacAddress = Regex.Replace(macAddress, '', '') Static byte BuildMagicPacket(string macAddress) // MacAddress in any standard HEX format U.Address.AddressFamily = AddressFamily.InterNetwork & !iPInterfaceProperties.GetIPv4Properties().IsAutomaticPrivateAddressingActive).FirstOrDefault() U.Address.AddressFamily = AddressFamily.InterNetworkV6 & !u.Address.IsIPv6LinkLocal).FirstOrDefault() Īwait SendWakeOnLan(unicastIPAddressInformation.Address, multicastIpAddress, magicPacket) Įlse if (multicastIpAddress.ToString().Equals('224.0.0.1')) // Ipv4: All hosts on LAN UnicastIPAddressInformation unicastIPAddressInformation = ((u) => If (multicastIpAddress.ToString().StartsWith('ff02::1%', StringComparison.OrdinalIgnoreCase)) // Ipv6: All hosts on LAN (with zone index)

IPAddress multicastIpAddress = multicastIPAddressInformation.Address IPInterfaceProperties iPInterfaceProperties = networkInterface.GetIPProperties() įoreach (MulticastIPAddressInformation multicastIPAddressInformation in iPInterfaceProperties.MulticastAddresses) N.NetworkInterfaceType != NetworkInterfaceType.Loopback & n.OperationalStatus = OperationalStatus.Up)) Public static async Task WakeOnLan(string macAddress)īyte magicPacket = BuildMagicPacket(macAddress) įoreach (NetworkInterface networkInterface in NetworkInterface.GetAllNetworkInterfaces().Where((n) =>

Wakeonlan wifi mac#

works using multicast (broadcast is buggy in Windows when using multiple NICs and is not supported when using ipv6).Īll you need, is the MAC address of the wired nic on the computer you wish to wake up.

works with macaddress in any standard hex format.

works with one or multiple network cards (NICS) connected to different networks (both computers).

My goal was to make a universal and easy Wake On Lan class that: Since I didn't see any C# in the accepted answer, I wrote my own 'Wake On Lan' code. Very old question, I know, but still valid.