lib/learning-switch.h

   1 /*
   2  * Copyright (c) 2008, 2010 Nicira Networks.
   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
  24 struct ofpbuf;
  25 struct rconn;
  26
  27 enum lswitch_mode {
  28     LSW_NORMAL,                 /* Always use OFPP_NORMAL. */
  29     LSW_FLOOD,                  /* Always use OFPP_FLOOD. */
  30     LSW_LEARN                   /* Learn MACs at controller. */
  31 };
  32
  33 struct lswitch_config {
  34     enum lswitch_mode mode;
  35
  36     /* Set up only exact-match flows? */
  37     bool exact_flows;
  38
  39     /* <0: Process every packet at the controller.
  40      * >=0: Expire flows after they are unused for 'max_idle' seconds.
  41      * OFP_FLOW_PERMANENT: Set up permanent flows. */
  42     int max_idle;
  43
  44     /* Optionally, a chain of one or more OpenFlow messages to send to the
  45      * switch at time of connection.  Presumably these will be OFPT_FLOW_MOD
  46      * requests to set up the flow table. */
  47     const struct ofpbuf *default_flows;
  48
  49     /* The OpenFlow queue to use by default.  Use UINT32_MAX to avoid
  50      * specifying a particular queue. */
  51     uint32_t default_queue;
  52
  53     /* Maps from a port name to a queue_id (cast to void *). */
  54     const struct shash *port_queues;
  55 };
  56
  57 struct lswitch *lswitch_create(struct rconn *, const struct lswitch_config *);
  58 void lswitch_set_queue(struct lswitch *sw, uint32_t queue);
  59 void lswitch_run(struct lswitch *);
  60 void lswitch_wait(struct lswitch *);
  61 void lswitch_destroy(struct lswitch *);
  62 void lswitch_process_packet(struct lswitch *, struct rconn *,
  63                             const struct ofpbuf *);
  64
  65
  66 #endif /* learning-switch.h */