7.7. Udp Connection¶

Udp state-full dissector module.

Usage:

local udp_connection = require('protocol/udp_connection')

7.7.1. Dissector¶

dissector UdpConnectionDissector¶

Name :	`'udp_connection'`
Extend :	`haka.helper.FlowDissector`

State-full dissector for UDP. It will associate each UDP packet with its matching connection.

<UdpConnectionDissector>.srcip¶

<UdpConnectionDissector>.dstip¶

Type:	`ipv4.addr`

Connection IP informations.

<UdpConnectionDissector>.srcport¶

<UdpConnectionDissector>.dstport¶

Type:	number

Connection port informations.

<UdpConnectionDissector>:drop()¶: Drop the UDP connection. All future packets that belong to this connection will be silently dropped for a few seconds.

event udp_connection.events.new_connection(flow, udp)¶

Parameters:	flow (`UdpConnectionDissector`) – UDP flow. udp (`UdpDissector`) – UDP packet.

Event triggered whenever a new UDP connection is about to be created.

event udp_connection.events.end_connection(flow)¶

Parameters:	flow (`UdpConnectionDissector`) – UDP flow.

Event triggered whenever a new UDP connection is being closed.

event udp_connection.events.receive_data(flow, payload, direction)¶

Parameters:	flow (`UdpConnectionDissector`) – UDP flow. payload (`vbuffer`) – Payload data. direction (string) – Data direction (`'up'` or `'down'`).

Event triggered when some data are available on a UDP connection.

dissector udp_connection.helper.UdpFlowDissector¶

UdpFlowDissector.dissect(cls, flow)¶

Parameters:	cls – Current dissector class. flow (`UdpConnectionDissector`) – Parent Udp flow.

Enable the dissector on a given flow.

UdpFlowDissector.install_udp_rule(cls, port)¶

Parameters:	cls – Current dissector class. port (number) – Udp port to select.

Create a security rule to enable the dissector on a given flow.

<UdpFlowDissector>.__init(flow)¶

Param flow:	Parent Udp flow.
Ptype flow:	`UdpConnectionDissector`

<UdpFlowDissector>.flow¶

Type:	`UdpConnectionDissector`

Underlying Udp stream.