package frenetic

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package frenetic
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Abstract version of group table, first introduced in OpenFlow 1.1 and widely implemented in OpenFlow 1.3. Generally there is one group table per switch.

A group table combines (1) a list of actions into a bucket - the bucket may, for example, modify some packet headers and send it out a port. (2) a set of action buckets into a group. Only one action bucket is executed, but the choice between buckets is made by "liveness" (as in a fast failover group) or round-robin.

This version of a group table is mutable - you create a group table, then add groups or clear them out with operations.

TODO: This should probably be merged with OpenFlow since it's an abstraction. Also commit should produce a OpenFlow0x04 structure directly, like to_par, to_seq, etc. in OpenFlow

type t
val to_string : t -> string

String representation of group table.

val create : unit -> t

Create a new group table

Creates a new group, allocating a fresh ID.

val clear_groups : t -> unit

Forgets all groups

val commit : t -> OpenFlow0x04.Message.t list

Produces a list of messages to realize the previous add_group and clear_groups commands, upto the last commit command.

val add_fastfail_group : t -> OpenFlow0x04.portId list -> OpenFlow0x04.groupId

Creates a new fast fail group which forwards out of the first live port in * ports and otherwise drops.

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