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---
name: packet-capture-engine
title: Packet Capture Engine
description: Use when capturing raw packets across platforms with pcap.
category: networking
tags: [packet, capture, pcap, npcap, rust, cross-platform]
---
# Packet Capture Engine
**Trigger**: Use when capturing raw network packets across platforms for inspection.
**Libraries**: `pcap` (libpcap bindings), `pnet` (packet manipulation), `etherparse` (parsing)
**Implementation**: Ring buffer capture via `pcap::Capture::from_device` → async `PacketStream`. BPF pre-filtering at kernel level. Multi-queue distribution: one thread per NIC queue via RSS. Zero-copy via shared memory rings (Linux PACKET_MMAP, Windows NPcap). Nanosecond timestamping (PCAPNG format).
**Connected**: `firewall-rules-engine`, `port-scanner-detection`, `protocol-identifier`, `traffic-analyzer`, `multi-queue-capture`
