ethernet
gnet
ethernet | gnet | |
---|---|---|
13 | 6 | |
270 | 9,081 | |
- | - | |
2.7 | 8.4 | |
about 2 years ago | 6 days ago | |
Go | Go | |
MIT License | Apache License 2.0 |
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ethernet
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Writing a Network Scanner using Python
After creating the ARP Request packet we need to now create an Ethernet Frame. The Ethernet frame contains fields such as Source and Destination Hardware (MAC) among others. Now, as the communication inside a network is carried out using the MAC Address, we can set the value of destination hardware address field to theMAC Address to which we want to communicate. Learn more about Ethernet Frame here.
- Ethernet Is Still Going Strong After 50 Years
- Twincat Master does not find couplers
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Ask HN: Any lightweight protocol on top of Ethernet without TCP/IP?
You can send raw packets with something like this [1] [2].
I imagine you want to test the approach is software before implementing it in an FPGA.
You can then construct Ethernet frames to be as simple as you like [3].
This question seems like what you might be trying to do [4].
[1] https://stackoverflow.com/questions/12229155/how-do-i-send-a...
[2] https://stackoverflow.com/questions/57133295/how-can-i-liste...
[3] https://en.wikipedia.org/wiki/Ethernet_frame
[4] https://stackoverflow.com/questions/815758/simple-serial-poi...
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Manipulating internet and wireless connections with different protocols
Ethernet frame structure (https://en.wikipedia.org/wiki/Ethernet_frame)
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MAC Address vs local IP?
Some communication does happen at the MAC level, like ARP, but these days it's all done with the expectation that your machine is going to be making use of TCP/IP. So this layer 2(-ish) protocol really just exists to establish the addressing. So the point of a private IP is mainly because all of the typical communication protocols we use expect one. Could you make something work without one? MAC-to-MAC? Yes, that's ethernet traffic, and the Wikipedia page shows the source and destination MACs as part of the structure of the header of a frame.
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Am I understanding how switches work correctly?
I find looking at the header structure directly helps me to wrap my head around it. At layer 2 you are dealing exclusively with Ethernet frames which have a number of fields in their header that indicate their source and destination MAC addresses, among other things. These frames are what the switch builds it's CAM table from and it uses that table to forward traffic, and for a layer 2 switch that is the entire picture.
- Help with L2 Networking Frames
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Ethernet frames
The preamble and SFD (and IPG) are not part of the frame, they are part of the Layer 1 Packet. This is one of the most common Ethernet misconceptions. See Wikpedia's Ethernet Frame article.
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Application of Digital Communications to Personal Life
Wrong layer. :) This is later two, or the Data Link layer. https://en.wikipedia.org/wiki/Ethernet_frame
gnet
- Gnet is the fastest networking framework in Go
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Handling TCP connections at scale - Ideas/Suggestions
Exciting question. Many goroutines consume resources accordingly and could also generate latency due to this. If you work under Linux: Have you looked at epoll? Since the system has to do basic connection handling anyway, you can shift or save at least part of the task. gnet is a very good library here to handle epoll & co. Maybe it makes sense to have a look at it or directly use epoll under go.
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Show HN: Go-Nbd – A Pure Go NBD Server and Client
Since this heavily involves networking, take a look into using gnet [0]. You might find some interesting performance improvements by using that over just net.Conn.
[0] https://github.com/panjf2000/gnet
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Millions of Active WebSockets with Node.js
Node is a joke. It's not good for this.
Check out https://github.com/panjf2000/gnet, it also has some links at the end.
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Show HN: Python framework is faster than Golang Fiber
Since we're in the useless benchmark, this Go native library completely wreck any C/C++ lib wrapped by Python: https://github.com/panjf2000/gnet
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Goroutines Are Not Significantly Lighter Than Threads
Go does not forces you to do any of that: https://github.com/panjf2000/gnet
What are some alternatives?
gopacket - Provides packet processing capabilities for Go
fasthttp - Fast HTTP package for Go. Tuned for high performance. Zero memory allocations in hot paths. Up to 10x faster than net/http
NFF-Go - NFF-Go -Network Function Framework for GO (former YANFF)
netpoll - A high-performance non-blocking I/O networking framework focusing on RPC scenarios.
llb
gev - 🚀Gev is a lightweight, fast non-blocking TCP network library / websocket server based on Reactor mode. Support custom protocols to quickly and easily build high-performance servers.
gosnmp - An SNMP library written in Go
evio - Fast event-loop networking for Go
gopcap - A simple wrapper around libpcap for the Go programming language
nbio - Pure Go 1000k+ connections solution, support tls/http1.x/websocket and basically compatible with net/http, with high-performance and low memory cost, non-blocking, event-driven, easy-to-use.
water - A simple TUN/TAP library written in native Go.
gaio - High performance async-io(proactor) networking for Golang。golangのための高性能非同期io(proactor)ネットワーキング