1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
10 * charge, to any person obtaining a copy of this Software to deal in
11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
35 #define SWITCH_FLOW_H 1
43 /* Identification data for a flow. */
45 struct flow flow; /* Flow data (in network byte order). */
46 uint32_t wildcards; /* Wildcard fields (in host byte order). */
49 /* Maximum number of actions in a single flow entry. */
50 #define MAX_ACTIONS 16
53 struct sw_flow_key key;
55 uint32_t group_id; /* Flow group ID (for QoS). */
56 uint16_t max_idle; /* Idle time before discarding (seconds). */
57 uint16_t priority; /* Only used on entries with wildcards. */
58 time_t created; /* When the flow was created. */
59 time_t timeout; /* When the flow expires (if idle). */
60 uint64_t packet_count; /* Number of packets seen. */
61 uint64_t byte_count; /* Number of bytes seen. */
64 /* Actions (XXX probably most flows have only a single action). */
65 unsigned int n_actions;
66 struct ofp_action *actions;
69 int flow_matches(const struct sw_flow_key *, const struct sw_flow_key *);
70 int flow_del_matches(const struct sw_flow_key *, const struct sw_flow_key *,
72 struct sw_flow *flow_alloc(int n_actions);
73 void flow_free(struct sw_flow *);
74 void flow_deferred_free(struct sw_flow *);
75 void flow_extract_match(struct sw_flow_key* to, const struct ofp_match* from);
76 void flow_fill_match(struct ofp_match* to, const struct sw_flow_key* from);
78 void print_flow(const struct sw_flow_key *);
79 int flow_timeout(struct sw_flow *flow);
80 void flow_used(struct sw_flow *flow, struct buffer *buffer);
82 #endif /* switch-flow.h */