wake-on-lan | Sending magic packets and performing IP address

by nikeee C# Version: v2.0.2 License: LGPL-3.0

X-Ray Key Features Code Snippets(3)Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | wake-on-lan Summary

wake-on-lan is a C# library typically used in Internet of Things (IoT) applications. wake-on-lan has no bugs, it has no vulnerabilities, it has a Weak Copyleft License and it has low support. You can download it from GitHub.

Sending magic packets and performing IP address operations.

Support

Quality

Security

License

Reuse

Support

wake-on-lan has a low active ecosystem.

It has 40 star(s) with 16 fork(s). There are 4 watchers for this library.

It had no major release in the last 12 months.

There are 5 open issues and 7 have been closed. On average issues are closed in 261 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of wake-on-lan is v2.0.2

Quality

wake-on-lan has 0 bugs and 0 code smells.

Security

wake-on-lan has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

wake-on-lan code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

wake-on-lan is licensed under the LGPL-3.0 License. This license is Weak Copyleft.

Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

Reuse

wake-on-lan releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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wake-on-lan Key Features

No Key Features are available at this moment for wake-on-lan.

wake-on-lan Examples and Code Snippets

Wake-On-LAN ,Samples,Getting Subnet Information

Lines of Code : 25

License : Weak Copyleft (LGPL-3.0)

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using System.Net;
using System.Net.Topology;
// ...

var someIp = new IPAddress(new byte[] { 192, 168, 1, 23 }); // Some IP address in the subnet
var mask = new NetMask(255, 255, 255, 0); // the network mask of the subnet

// CIDR-notation number of

Wake-On-LAN ,Samples,Sending a Magic Packet

Lines of Code : 17

License : Weak Copyleft (LGPL-3.0)

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using System.Net;
// ...

// Using the IPAddess extension
IPAddress.Broadcast.SendWol(0x00, 0x11, 0x22, 0x33, 0x44, 0x55);

// via core MagicPacket class
var endPoint = new IPEndPoint(IPAddress.Broadcast, 7); // You don't have to use Broadcast.

Wake-On-LAN ,Samples,ARP Requests

Lines of Code : 9

License : Weak Copyleft (LGPL-3.0)

Copy

ArpRequestResult res = ArpRequest.Send(someIp);
if(res.Exception != null)
{
    Console.WriteLine("ARP error occurred: " + res.Exception.Message);
}
else
{
    Console.WriteLine($"Host MAC address: {res.Address}");
}

Community Discussions

Trending Discussions on wake-on-lan

Why WOL(WakeOnLan) Is Releated To Operating System?

Wake-on-Lan app only works for recently shutdown devices

What is ethtool and is it important for usable ethernet NIC. Can I remove it from device driver and still able to use network

How to write to port 0 with QUdpSocket?

QUESTION

Why WOL(WakeOnLan) Is Releated To Operating System?

Asked 2021-Sep-11 at 07:16

Wikipedia says:

Wake-on-LAN (WoL) is an Ethernet or Token Ring computer networking standard that allows a computer to be turned on or awakened by a network message.

But, in another section:

Responding to the magic packet ... Most WoL hardware functionally is typically blocked by default and needs to be enabled in using the system BIOS. Further configuration from the OS is required in some cases, for example via the Device Manager network card properties on Windows operating systems.

Why? why do we need to also enable WOL in OS?

The Problem:

My actual problem rise when I implement a WOL program to turn on other PCs in a network(connected by LAN) from a local server. But failed, because it needs some extra configurations in the PCs:

The configurations are different from OS to OS (and from version to version).
Some of the configurations are not permanent and need to be done in every OS startup. (for example: in Ubuntu 16.04 I had to run ethtool -s eno1 wol g).

Is there any way to bypass the OS configurations and only enable WOL from BIOS settings? Or it's the code problem?

WOL Example: ...

ANSWER

Answered 2021-Sep-11 at 07:16

The OS is involved only to the extent that there's not a standardized way to enable WoL for all hardware. Therefore, you typically need a device driver for the specific hardware to be able to enable the hardware's capability. Loading the OS usually gives you such a device driver.

Running ethtool every startup should be fairly trivial, especially since (at last if memory serves) running it twice (or more) should be harmless, so you can add it to (for one example) your .bashrc. If you need to ensure it really only happens once when you start up, instead of every time you login, you can add an init script to do that. man init-d-script should get you going pretty easily.

You have to enable it because most BIOSes leave it disabled by default, so unless you enable it, it won't work.

As to why the disable it by default: less certain, but my guess is that it's simply because most people don't use it.

Source https://stackoverflow.com/questions/69140443

QUESTION

Wake-on-Lan app only works for recently shutdown devices

Asked 2021-Feb-20 at 17:12

I have written a small application in Kotlin which sends a Magic Packet to a smart tv over my local network. I used this approach (code), rewritten in Kotlin (plus i hardcoded the IP and MAC for testing purposes).

When the tv is shutdown, i can easily restart it with my application. After a while, that doesn't work anymore.

Code ...

ANSWER

Answered 2021-Feb-20 at 11:38

When sending a wakeonlan packet, you need to make sure the target device can receive the packet.

At the moment, you are sending the packet to the IPv4 address of the device.

When your computer has to send a packet to an IPv4 address, it needs to know its MAC address. So it asks the network "Who has IPv4 192.168.2.32? Tell me your mac address". Since you TV is shutdown, it does not respond.

The real wake on lan packet will never be send, as it des not know the destination mac address.

The real question then becomes, why does it work directly after shutting down, and the reason for this is that your OS keeps a list of IPv4+mac address table, so it can quickly send the packet out. You can view this list with the command arp -av on Windows

Note how it shows "dynamic" when your program successfully wakes the TV, but shows "invalid" when it fails to wake the TV up.

One solution for this, is sending the packet to the broadcast IPv4 address, which every devices receives. This IPv4 address typically ends with .255 with typical consumer IPv4 ranges.

Source https://stackoverflow.com/questions/66290924

QUESTION

What is ethtool and is it important for usable ethernet NIC. Can I remove it from device driver and still able to use network

Asked 2021-Feb-11 at 04:14

I am studying realtek device driver and came across ethtool operations like ethtool_ops there are many operation included in the operations object. Following is the code

...

ANSWER

Answered 2021-Feb-06 at 12:57

Long story short, ethtool is a means to display and adjust generic NIC/driver parameters (identification, the number of receive and transmit queues, receive and transmit offloads, you name it) in a userspace application. On the one side, there's kernel API which a NIC driver is connected to (in particular, by means of struct ethtool_ops). On the other side, there's an ioctl command named SIOCETHTOOL which a userspace application can use to send requests to the kernel side and get responses.

Sub-identifiers enumerating specific commands for SIOCETHTOOL exist, and they correspond to the methods of struct ethtool_ops. From the question of yours it follows that it's struct ethtool_ops that should be explained.

I suggest that you take a look at include/linux/ethtool.h. There's a comment section right before the definition of struct ethtool_ops. In particular:

Source https://stackoverflow.com/questions/66063229

QUESTION

How to write to port 0 with QUdpSocket?

Asked 2021-Feb-04 at 04:57

I want to implement the WoL Magic Packet using Qt to be portable cross GNU/Linux and Microsoft Windows. Wikipedia says: "is typically sent as a UDP datagram to port 0 (reserved port number), 7 (Echo Protocol) or 9 (Discard Protocol)", but I couldn't write any data on port 0 with QUdpSocket, Why?

Sample of the problem ...

ANSWER

Answered 2021-Feb-03 at 10:27

^{Note: this answer only considers Linux, but the same should hold for any other system that implements UDP according to the IETF RFCs.}

TL;DR: Use connectToHost and write

You have to QUdpSocket::connectToHost and then QIODevice::write, e.g.

Source https://stackoverflow.com/questions/66023499

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install wake-on-lan

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Support

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