base/frameworks/openflow/main.zeek¶
- OpenFlow¶
Zeek’s OpenFlow control framework.
This plugin-based framework allows to control OpenFlow capable switches by implementing communication to an OpenFlow controller via plugins. The framework has to be instantiated via the new function in one of the plugins. This framework only offers very low-level functionality; if you want to use OpenFlow capable switches, e.g., for shunting, please look at the NetControl framework, which provides higher level functions and can use the OpenFlow framework as a backend.
- Namespace
OpenFlow
- Imports
base/frameworks/openflow/consts.zeek, base/frameworks/openflow/types.zeek
Summary¶
Events¶
Event that is raised once a controller finishes initialization and is completely activated. |
|
Reports an error while installing a flow Rule. |
|
Event confirming successful modification of a flow rule. |
|
Reports that a flow was removed by the switch because of either the hard or the idle timeout. |
Functions¶
Function to signal that a controller finished activation and is ready to use. |
|
Clear the current flow table of the controller. |
|
Global flow_mod function. |
|
Function to generate a new cookie using our group id. |
|
Function to get the group id out of a given cookie. |
|
Function to get the unique id out of a given cookie. |
|
Function to lookup a controller instance by name. |
|
Convert a conn_id record into an ofp_match record that can be used to create match objects for OpenFlow. |
|
Function to register a controller instance. |
|
Function to unregister a controller instance. |
Detailed Interface¶
Events¶
- OpenFlow::controller_activated¶
- Type
event
(name:string
, controller:OpenFlow::Controller
)
Event that is raised once a controller finishes initialization and is completely activated.
- Parameters
name – Unique name of this controller instance.
controller – The controller that finished activation.
- OpenFlow::flow_mod_failure¶
- Type
event
(name:string
, match:OpenFlow::ofp_match
, flow_mod:OpenFlow::ofp_flow_mod
, msg:string
&default
=""
&optional
)
Reports an error while installing a flow Rule.
- Parameters
name – The unique name of the OpenFlow controller from which this event originated.
match – The ofp_match record which describes the flow to match.
flow_mod – The openflow flow_mod record which describes the action to take.
msg – Message to describe the event.
- OpenFlow::flow_mod_success¶
- Type
event
(name:string
, match:OpenFlow::ofp_match
, flow_mod:OpenFlow::ofp_flow_mod
, msg:string
&default
=""
&optional
)
Event confirming successful modification of a flow rule.
- Parameters
name – The unique name of the OpenFlow controller from which this event originated.
match – The ofp_match record which describes the flow to match.
flow_mod – The openflow flow_mod record which describes the action to take.
msg – An optional informational message by the plugin.
- OpenFlow::flow_removed¶
- Type
event
(name:string
, match:OpenFlow::ofp_match
, cookie:count
, priority:count
, reason:count
, duration_sec:count
, idle_timeout:count
, packet_count:count
, byte_count:count
)
Reports that a flow was removed by the switch because of either the hard or the idle timeout. This message is only generated by controllers that indicate that they support flow removal in supports_flow_removed.
- Parameters
name – The unique name of the OpenFlow controller from which this event originated.
match – The ofp_match record which was used to create the flow.
cookie – The cookie that was specified when creating the flow.
priority – The priority that was specified when creating the flow.
reason – The reason for flow removal (OFPRR_*).
duration_sec – Duration of the flow in seconds.
packet_count – Packet count of the flow.
byte_count – Byte count of the flow.
Functions¶
- OpenFlow::controller_init_done¶
- Type
function
(controller:OpenFlow::Controller
) :void
Function to signal that a controller finished activation and is ready to use. Will throw the
OpenFlow::controller_activated
event.
- OpenFlow::flow_clear¶
- Type
function
(controller:OpenFlow::Controller
) :bool
Clear the current flow table of the controller.
- Parameters
controller – The controller which should execute the flow modification.
- Returns
F on error or if the plugin does not support the operation, T when the operation was queued.
- OpenFlow::flow_mod¶
- Type
function
(controller:OpenFlow::Controller
, match:OpenFlow::ofp_match
, flow_mod:OpenFlow::ofp_flow_mod
) :bool
Global flow_mod function.
- Parameters
controller – The controller which should execute the flow modification.
match – The ofp_match record which describes the flow to match.
flow_mod – The openflow flow_mod record which describes the action to take.
- Returns
F on error or if the plugin does not support the operation, T when the operation was queued.
- OpenFlow::generate_cookie¶
-
Function to generate a new cookie using our group id.
- Parameters
cookie – The openflow match cookie.
- Returns
The cookie group id.
- OpenFlow::get_cookie_gid¶
-
Function to get the group id out of a given cookie.
- Parameters
cookie – The openflow match cookie.
- Returns
The cookie group id.
- OpenFlow::get_cookie_uid¶
-
Function to get the unique id out of a given cookie.
- Parameters
cookie – The openflow match cookie.
- Returns
The cookie unique id.
- OpenFlow::lookup_controller¶
- Type
function
(name:string
) :vector
ofOpenFlow::Controller
Function to lookup a controller instance by name.
- Parameters
name – Unique name of the controller to look up.
- Returns
One element vector with controller, if found. Empty vector otherwise.
- OpenFlow::match_conn¶
-
Convert a conn_id record into an ofp_match record that can be used to create match objects for OpenFlow.
- Parameters
id – The conn_id record that describes the record.
reverse – Reverse the sources and destinations when creating the match record (default F).
- Returns
ofp_match object for the conn_id record.
- OpenFlow::register_controller¶
- Type
function
(tpe:OpenFlow::Plugin
, name:string
, controller:OpenFlow::Controller
) :void
Function to register a controller instance. This function is called automatically by the plugin _new functions.
- Parameters
tpe – Type of this plugin.
name – Unique name of this controller instance.
controller – The controller to register.
- OpenFlow::unregister_controller¶
- Type
function
(controller:OpenFlow::Controller
) :void
Function to unregister a controller instance. This function should be called when a specific controller should no longer be used.
- Parameters
controller – The controller to unregister.