Allow vendors to define their own actions. Actions were originally fixed-
length, which was a bit constraining. Actions now contain a length field,
which gives them more flexibility.
This cleans up the handling of modifying existing flows. There now exists
OFPFC_MODIFY and OFPFC_MODIFY_STRICT commands, which have the same matching
characteristics to their OFPFC_DELETE* counterparts. When adding a flow that
already exists, the counters and timers are now reset (ie, its treated as a
new flow). This commit also adds the "--strict" option to dpctl to allow
strict matching for "mod-flows" and "del-flows".
Older versions of OpenFlow pre-defined a few different types of tables and the
Features Reply message would indicate how many of those entries existed. This
was very inflexible, so now the Features Reply just indicates how many tables
there are. The controller now sends a Table Stats request to find out how
many entries are supported and the fields that can be wildcarded.
This change also removes the "buffer_mb" field from the Features Reply, since
it was not being used and seemed to be of limited value.
Justin Pettit
Ben Pfaff
casado