sniffer

package
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Published: Oct 9, 2019 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Overview

Package sniffer provides the implementation of data-link layer endpoints that wrap another endpoint and logs inbound and outbound packets.

Sniffer endpoints can be used in the networking stack by calling New(eID) to create a new endpoint, where eID is the ID of the endpoint being wrapped, and then passing it as an argument to Stack.CreateNIC().

Index

Constants

This section is empty.

Variables

View Source
var LogPackets uint32 = 1

LogPackets is a flag used to enable or disable packet logging via the log package. Valid values are 0 or 1.

LogPackets must be accessed atomically.

View Source
var LogPacketsToFile uint32 = 1

LogPacketsToFile is a flag used to enable or disable logging packets to a pcap file. Valid values are 0 or 1. A file must have been specified when the sniffer was created for this flag to have effect.

LogPacketsToFile must be accessed atomically.

Functions

func New

New creates a new sniffer link-layer endpoint. It wraps around another endpoint and logs packets and they traverse the endpoint.

func NewWithFile

func NewWithFile(lower stack.LinkEndpoint, file *os.File, snapLen uint32) (stack.LinkEndpoint, error)

NewWithFile creates a new sniffer link-layer endpoint. It wraps around another endpoint and logs packets and they traverse the endpoint.

Packets can be logged to file in the pcap format. A sniffer created with this function will not emit packets using the standard log package.

snapLen is the maximum amount of a packet to be saved. Packets with a length less than or equal too snapLen will be saved in their entirety. Longer packets will be truncated to snapLen.

Types

This section is empty.

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