This makes it easier to install the headers, or to use them directly from
another software package with -I$(openflow)/include, without invading
the top-level include file namespace.
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".
Actions are allocated as a pointer to an array of actions in flows. When
flows are freed, the code was always freeing the action pointer.
Under some circumstances the pointer may not be set.
This updates the OpenFlow protocol version and changes the names of
structure members, so any software that uses OpenFlow will need to be
updated to match.
When the controller wishes to add a flow entry to the switch, it sends a request with a description of matching flows in a "match". The switch was adding these exactly as described into the flow tables. However, when packets arrived, all invalid fields (e.g., the TCP/UDP ports in a non-TCP/UDP packet) are set to zero. If the rule being added by the controller had not set these invalid fields to zero, the packets would never match. We now zero out these fields when extracing a "match".
-- Reported by Brandon H. --
Ben Pfaff
Justin Pettit
Ben Pfaff
Martin Casado