jetdirect

Documentation

Overview

Package jetdirect implements JetDirect/PJL printer detection.

Detection Strategy: Phase 1: Send UEL + PJL INFO ID probe to identify PJL-aware printers.

• The UEL escape sequence (\x1b%-12345X) resets the printer to PJL mode.
• @PJL INFO ID requests the printer's identification string.
• Valid responses contain @PJL INFO ID followed by a quoted model string.

Phase 2: Enrichment (best-effort, failures do not affect detection):

• @PJL INFO STATUS for printer status code
• @PJL FSDIRLIST to detect filesystem access (security finding)

Default port: 9100 (also 9101, 9102 for additional print channels)

Wire Protocol Reference:

• HP PJL Technical Reference Manual
• UEL: ESC%-12345X (hex: 1B 25 2D 31 32 33 34 35 58)

Index

• Constants
• type JetDirectPlugin
  • func (p *JetDirectPlugin) Name() string
  • func (p *JetDirectPlugin) PortPriority(port uint16) bool
  • func (p *JetDirectPlugin) Priority() int
  • func (p *JetDirectPlugin) Run(conn net.Conn, timeout time.Duration, target plugins.Target) (*plugins.Service, error)
  • func (p *JetDirectPlugin) Type() plugins.Protocol

Constants

const (
	JETDIRECT = "jetdirect"
)

Types

type JetDirectPlugin

type JetDirectPlugin struct{}

JetDirectPlugin implements the fingerprintx Plugin interface for JetDirect/PJL detection.

func (*JetDirectPlugin) Name

func (p *JetDirectPlugin) Name() string

Name returns the protocol name.

func (*JetDirectPlugin) PortPriority

func (p *JetDirectPlugin) PortPriority(port uint16) bool

PortPriority returns true for the standard JetDirect ports.

func (*JetDirectPlugin) Priority

func (p *JetDirectPlugin) Priority() int

Priority returns the plugin priority. Port 9100 is exclusive to JetDirect.

func (*JetDirectPlugin) Run

func (p *JetDirectPlugin) Run(conn net.Conn, timeout time.Duration, target plugins.Target) (*plugins.Service, error)

Run implements the Plugin interface. Sends PJL INFO ID probe and returns service if detected.

func (*JetDirectPlugin) Type

func (p *JetDirectPlugin) Type() plugins.Protocol

Type returns TCP as the transport protocol.