93 lines
3.6 KiB
C#
93 lines
3.6 KiB
C#
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using NetworkResurrector.Abstractions;
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using System.Globalization;
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using System.Net;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace NetworkResurrector.WakeOnLan
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{
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internal class WolDriver : IWakeOnLanService
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{
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private readonly WolClient _client;
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public WolDriver(WolClient client)
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{
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_client = client;
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}
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public async Task<(bool success, string message)> Wake(string macAddress)
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{
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//remove all non 0-9, A-F, a-f characters
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macAddress = Regex.Replace(macAddress, @"[^0-9A-Fa-f]", "");
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//check if mac adress length is valid
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if (macAddress.Length != 12)
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return (false, "Invalid MAC address.");
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else
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return await Wakeup(macAddress);
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}
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#region Wakeup
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/// <summary>
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/// Wakes up the machine with the given <paramref name="macAddress"/>.
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/// </summary>
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/// <remarks>
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/// <para>
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/// <note>
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/// <list type="number">
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/// <item> The motherboard must support Wake On LAN.</item>
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/// <item> The NIC must support Wake On LAN.</item>
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/// <item> There must be a wire connecting the motherboard's WOL port to
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/// the NIC's WOL port. Usually there always is a connection on most of
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/// the PCs.</item>
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/// <item> The Wake On LAN feature must be enabled in the motherboard's
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/// BIOS. Usually this is also enabled by default, but you might like to
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/// check again.</item>
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/// <item> The "Good Connection" light on the back of the NIC must be lit
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/// when the machine is off. (By default always good if you are not
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/// facing any network issues)</item>
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/// <item> Port 12287 (0x2FFF) must be open. (By default it should be
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/// open unless some antivirus or any other such program has changed
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/// settings.)</item>
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/// <item> Packets cannot be broadcast across the Internet. That's why
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/// it's called Wake On Lan, not Wake On Internet.</item>
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/// <item> To find your MAC address, run the MSINFO32.EXE tool that is a
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/// part of Windows and navigate to Components > Network > Adapter
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/// or simply type nbtstat -a <your hostname < at command prompt.
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/// e.g. nbtstat -a mymachinename or nbtstat -A 10.2.100.213.
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/// <param name="macAddress">The MAC address of the host which has to be
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/// woken up.</param>
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///
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private async Task<(bool success, string message)> Wakeup(string macAddress)
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{
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_client.Connect(new IPAddress(0xffffffff) /*255.255.255.255 i.e broadcast*/, 0x2fff /*port = 12287*/);
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if (!_client.SetClientInBrodcastMode())
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return (false, "Remote client could not be set in broadcast mode!");
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int byteCount = 0;
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byte[] bytes = new byte[102];
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for (int trailer = 0; trailer < 6; trailer++)
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{
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bytes[byteCount++] = 0xFF;
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}
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for (int macPackets = 0; macPackets < 16; macPackets++)
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{
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int i = 0;
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for (int macBytes = 0; macBytes < 6; macBytes++)
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{
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bytes[byteCount++] = byte.Parse(macAddress.Substring(i, 2), NumberStyles.HexNumber);
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i += 2;
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}
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}
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int returnValue = await _client.SendAsync(bytes, byteCount);
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return (true, $"{returnValue} bytes sent to {macAddress}");
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}
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#endregion
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}
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}
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