ethernet
gopacket
ethernet | gopacket | |
---|---|---|
13 | 7 | |
270 | 6,118 | |
- | 0.7% | |
2.7 | 0.0 | |
about 2 years ago | 9 days ago | |
Go | Go | |
MIT License | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
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
gopacket
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As a Go developer, I’m surprised Crystal isn’t more popular
I have seen pcap but not packetz, thanks. Pcap looks unfinished and packetz has not been updated in a long time, but they might be able to make a working capture program. However the popularity and features available in Go regarding packet capture makes it very hard to beat. E.g. the Google gopacket library has 5.6k stars on github and as pretty much every feature you'd want for this sort of stuff built in.
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eCapture: capture HTTPS traffic without CA certificates on Android/Linux using Golang.
eCapture implements the feature of saving a pcapng file by eBPF TC, and supports TLS Master Secret Key capturing by eBPF Uprobe. Also, gopacket's DSB feature is supported, based on Decryption Secrets Block (DSB)
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Is it common to not have a local dev environment in go?
Well, there is https://github.com/google/gopacket/, you have a package that uses CGo, `pcap`, and then there is `pcapgo`, native Go implementation. Doesn't have all the features but in my case, I was able to use it and remove CGo.
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[Go] Try capturing TCP packets
I will capturing TCP packets by gopacket/pcap.
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Gain Visibility into Istio mTLS Traffic with Mizu
For example, gopacket uses libpcap by default for capturing the traffic. Libpcap doesn't support network namespaces and we can't ask it to listen to traffic on a different namespace. However, we can change the network namespace of the calling thread and then start libpcap to see the traffic on a different namespace.
- GO network programming resources
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networking - getting route and interface for a destination
https://pkg.go.dev/github.com/google/gopacket/routing - Linux only and not working correctly and not actively maintained
What are some alternatives?
NFF-Go - NFF-Go -Network Function Framework for GO (former YANFF)
gopcap - A simple wrapper around libpcap for the Go programming language
llb
dns - DNS library in Go
gosnmp - An SNMP library written in Go
raw - Package raw enables reading and writing data at the device driver level for a network interface. MIT Licensed.
gnet - 🚀 gnet is a high-performance, lightweight, non-blocking, event-driven networking framework written in pure Go./ gnet 是一个高性能、轻量级、非阻塞的事件驱动 Go 网络框架。
water - A simple TUN/TAP library written in native Go.
mdns - Simple mDNS client/server library in Golang
kcp-go - A Crypto-Secure, Production-Grade Reliable-UDP Library for golang with FEC