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https://github.com/openvswitch/ovs
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f25d0cf3c3
OpenFlow actions have always been somewhat awkward to handle. Moreover, over time we've started creating actions that require more complicated parsing. When we maintain those actions internally in their wire format, we end up parsing them multiple times, whenever we have to look at the set of actions. When we add support for OpenFlow 1.1 or later protocols, the situation will get worse, because these newer protocols support many of the same actions but with different representations. It becomes unrealistic to handle each protocol in its wire format. This commit adopts a new strategy, by converting OpenFlow actions into an internal form from the wire format when they are read, and converting them back to the wire format when flows are dumped. I believe that this will be more maintainable over time. Thanks to Simon Horman and Pravin Shelar for reviews. Signed-off-by: Ben Pfaff <blp@nicira.com>
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*
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* Copyright (c) 2010, 2011, 2012 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MULTIPATH_H
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#define MULTIPATH_H 1
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#include <stdint.h>
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#include "ofp-errors.h"
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struct ds;
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struct flow;
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struct nx_action_multipath;
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struct ofpact_multipath;
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struct ofpbuf;
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/* NXAST_MULTIPATH helper functions.
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*
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* See include/openflow/nicira-ext.h for NXAST_MULTIPATH specification.
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*/
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enum ofperr multipath_from_openflow(const struct nx_action_multipath *,
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struct ofpact_multipath *);
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enum ofperr multipath_check(const struct ofpact_multipath *,
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const struct flow *);
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void multipath_to_nxast(const struct ofpact_multipath *,
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struct ofpbuf *openflow);
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void multipath_execute(const struct ofpact_multipath *, struct flow *);
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void multipath_parse(struct ofpact_multipath *, const char *);
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void multipath_format(const struct ofpact_multipath *, struct ds *);
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#endif /* multipath.h */
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