lib/learning-switch.h

   1 /*
   2  * Copyright (c) 2008, 2010, 2011, 2012 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef LEARNING_SWITCH_H
  18 #define LEARNING_SWITCH_H 1
  19
  20 #include <stdbool.h>
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include "openvswitch/ofp-protocol.h"
  24
  25 struct ofpbuf;
  26 struct rconn;
  27
  28 enum lswitch_mode {
  29     LSW_NORMAL,                 /* Always use OFPP_NORMAL. */
  30     LSW_FLOOD,                  /* Always use OFPP_FLOOD. */
  31     LSW_LEARN                   /* Learn MACs at controller. */
  32 };
  33
  34 struct lswitch_config {
  35     enum lswitch_mode mode;
  36
  37     /* 0 to use exact-match flow entries,
  38      * a OFPFW10_* bitmask to enable specific wildcards,
  39      * or UINT32_MAX to use the default wildcards (wildcarding as many fields
  40      * as possible.
  41      *
  42      * Ignored when max_idle < 0 (in which case no flows are set up). */
  43     uint32_t wildcards;
  44
  45     /* <0: Process every packet at the controller.
  46      * >=0: Expire flows after they are unused for 'max_idle' seconds.
  47      * OFP_FLOW_PERMANENT: Set up permanent flows. */
  48     int max_idle;
  49
  50     /* Optional "flow mod" requests to send to the switch at connection time,
  51      * to set up the flow table. */
  52     const struct ofputil_flow_mod *default_flows;
  53     size_t n_default_flows;
  54     enum ofputil_protocol usable_protocols;
  55
  56     /* The OpenFlow queue to use by default.  Use UINT32_MAX to avoid
  57      * specifying a particular queue. */
  58     uint32_t default_queue;
  59
  60     /* Maps from a port name to a queue_id. */
  61     const struct simap *port_queues;
  62
  63     /* If true, do not reply to any messages from the switch (for debugging
  64      * fail-open mode). */
  65     bool mute;
  66 };
  67
  68 struct lswitch *lswitch_create(struct rconn *, const struct lswitch_config *);
  69 bool lswitch_is_alive(const struct lswitch *);
  70 void lswitch_set_queue(struct lswitch *sw, uint32_t queue);
  71 void lswitch_run(struct lswitch *);
  72 void lswitch_wait(struct lswitch *);
  73 void lswitch_destroy(struct lswitch *);
  74
  75 void lswitch_mute(struct lswitch *);
  76
  77 #endif /* learning-switch.h */