Golang pcap performance. Apr 21, 2025 · Purpose and Scope This document describes the Pure Go implementation of PCAP (Packet Capture) functionality provided by the pcapgo package. Packet capture library and tools in native go. Fast Golang PCAP Reader & Benchmark Comparison. Some caveats:. Unlike the pcap package which relies on C bindings to libpcap (see PCAP Capture), the pcapgo package offers a native Go implementation for reading and writing packet capture files without external dependencies. So that explains the performance similarities. Encapsulates Golang's processing of the received real-time packet parsing results for Golang calling Optimize memory leakage and improve the performance of real-time packet capture and parsing interfaces Feb 16, 2022 · Dealing with large PCAP datasets can be challenging. Core isolation, turning off or slowing down dynticks, interrupt masking, irq masking, etc. Provides packet processing capabilities for Go. /pcap. General purpose tools such as tcpdump have problems tackling niche use-cases and large datasets, so we created the "filter" subcommand for GopherCAP. My program will capture traffic promiscuously, so there will be some decent amount of bandwidth, that's why I'm very interested in the performance of gopacket. An open source project developed and supported by Stamus Networks, GopherCAP was initially designed for PCAP replay, but has since expanded to include functions for PCAP filtering and advanced threat research. Contribute to google/gopacket development by creating an account on GitHub. Sep 1, 2025 · Golang, combined with libraries like gopacket, allows you to capture and process raw network packets directly, giving you speed, scalability, and control without depending on third-party HTML structures. It can also calculate metadata for PCAP files and extract files from compressed tarballs Oct 19, 2020 · Package pcap allows users of gopacket to read packets off the wire or from pcap files. GopherCAP™ is a custom PCAP manipulation tool written in Golang that leverages Google’s GoPacket library for advanced packet replay. Aug 31, 2024 · Capturing traffic with custom logic on Golang. This implementation uses gopacket/gopacket for packet decoding. Contribute to dreadl0ck/gopcap development by creating an account on GitHub. First implemented feature being the ability to concurrently replay offline PCAP files on live network interface. extract SRTP-negotiated keys if present and available in the trace, associating them to the related RTP (or SRTP if the negotiation succeeded) stream. GoperCap uses gopacket and cobra to build a CLI tool for PCAP manipulation. The problem: Existing implementations often use binary. Contribute to iCodeIN/gopcap development by creating an account on GitHub. However, the function makes use of reflection, which hurts performance. While some of those approaches aren’t compatible with the kernel network stack, some are and some tend to give double digit percentage performance increases, which is why DPDK, performance obsessed as it is, recommends them. Additionally, if you are building for your local OS+arch, a binary named pcap will be deposited in the current directory, so you can just do . Accurate, modular, scalable PCAP manipulation tool written in Go. Don't forget to save pcap-compatible file. While preserving timestamps between each packet. Dec 15, 2025 · The binaries will be output as dist/pcap-<os>-<arch>. May 12, 2021 · How to build a Golang custom packet processor using the GoPacket library to passively watch API traffic. Mar 11, 2024 · The performance of the AF_PACKET method turns out to be almost identical to that achieved with the pcap method earlier. I've been thinking about using Go instead of C++ (PcapPlusPlus) for a cross platform packet capture program, however I've heard that Gopacket uses CGO for, so that leaves me wondering if it would lead to bad performance. Contribute to packetcap/go-pcap development by creating an account on GitHub. Does anyone Jul 2, 2025 · So, if performance is crucial and you only need to read PCAP, this lib might still be interesting. This blog describes the feature and explores the use case of building a dataset for research into SMB protocol-based lateral threat detection. In addition I wanted to: save each stream into a separate pcap file. Fast Golang PCAP Reader & Benchmark Comparison. Feb 19, 2021 · I needed an efficient way to programmatically extract RTP streams from a network capture. Read for parsing the binary data into the expected structure. With a user-friendly TUI interface, Sniffer captures and records packet information using gopacket. May 5, 2023 · Sniffer is a network troubleshooting tool that lets you analyze network traffic and processes without loading any kernel modules. A quick Google, shows that libpcap, the library underlying tools like tcpdump and the Go pcap bindings, uses AF_PACKET for packet capture and injection on Linux platforms. This package provides a pure golang implementation of both the client and server hash functions, with unit tests to ensure correct behavior and performance. mym ira uphnh dlx dyvfdg ouytnl narwmhf pdmux avze nbami