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datapath.h
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datapath.h
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/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
* Junior University
*
* We are making the OpenFlow specification and associated documentation
* (Software) available for public use and benefit with the expectation
* that others will use, modify and enhance the Software and contribute
* those enhancements back to the community. However, since we would
* like to make the Software available for broadest use, with as few
* restrictions as possible permission is hereby granted, free of
* charge, to any person obtaining a copy of this Software to deal in
* the Software under the copyrights without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* The name and trademarks of copyright holder(s) may NOT be used in
* advertising or publicity pertaining to the Software or any
* derivatives without specific, written prior permission.
*/
/* Interface exported by OpenFlow module. */
#ifndef DATAPATH_H
#define DATAPATH_H 1
#include <stdbool.h>
#include <stdint.h>
#include "openflow/nicira-ext.h"
#include "ofpbuf.h"
#include "timeval.h"
#include "list.h"
#include "netdev.h"
struct rconn;
struct pvconn;
struct sw_flow;
struct sender;
struct sw_queue {
struct list node; /* element in port.queues */
unsigned long long int tx_packets;
unsigned long long int tx_bytes;
unsigned long long int tx_errors;
uint32_t queue_id;
uint16_t class_id; /* internal mapping from OF queue_id to tc class_id */
struct sw_port *port; /* reference to the parent port */
/* keep it simple for now, only one property (assuming min_rate) */
uint16_t property; /* one from OFPQT_ */
uint16_t min_rate;
};
struct sw_port {
uint32_t config; /* Some subset of OFPPC_* flags. */
uint32_t state; /* Some subset of OFPPS_* flags. */
struct datapath *dp;
struct netdev *netdev;
struct list node; /* Element in datapath.ports. */
unsigned long long int rx_packets, tx_packets;
unsigned long long int rx_bytes, tx_bytes;
unsigned long long int tx_dropped;
uint16_t port_no;
/* port queues */
uint16_t num_queues;
struct sw_queue queues[NETDEV_MAX_QUEUES];
struct list queue_list; /* list of all queues for this port */
};
#define DP_MAX_PORTS 255
BUILD_ASSERT_DECL(DP_MAX_PORTS <= OFPP_MAX);
struct datapath {
/* Remote connections. */
struct list remotes; /* All connections (including controller). */
/* Listeners. */
struct pvconn **listeners;
size_t n_listeners;
time_t last_timeout;
/* Unique identifier for this datapath */
uint64_t id;
char dp_desc[DESC_STR_LEN]; /* human readible comment to ID this DP */
struct sw_chain *chain; /* Forwarding rules. */
/* Configuration set from controller. */
uint16_t flags;
uint16_t miss_send_len;
/* Switch ports. */
struct sw_port ports[DP_MAX_PORTS];
struct sw_port *local_port; /* OFPP_LOCAL port, if any. */
struct list port_list; /* All ports, including local_port. */
};
int dp_new(struct datapath **, uint64_t dpid);
int dp_add_port(struct datapath *, const char *netdev, uint16_t);
int dp_add_local_port(struct datapath *, const char *netdev, uint16_t);
void dp_add_pvconn(struct datapath *, struct pvconn *);
void dp_run(struct datapath *);
void dp_wait(struct datapath *);
void dp_send_error_msg(struct datapath *, const struct sender *,
uint16_t, uint16_t, const void *, size_t);
void dp_send_flow_end(struct datapath *, struct sw_flow *,
enum ofp_flow_removed_reason);
void dp_output_port(struct datapath *, struct ofpbuf *, int in_port,
int out_port, uint32_t queue_id, bool ignore_no_fwd);
void dp_output_control(struct datapath *, struct ofpbuf *, int in_port,
size_t max_len, int reason);
struct sw_port * dp_lookup_port(struct datapath *, uint16_t);
struct sw_queue * dp_lookup_queue(struct sw_port *, uint32_t);
#endif /* datapath.h */