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/*
* Copyright (c) 2011 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LACP_H
#define LACP_H 1
#include <stdbool.h>
#include <stdint.h>
#include "packets.h"
/* Masks for lacp_info state member. */
#define LACP_STATE_ACT 0x01 /* Activity. Active or passive? */
#define LACP_STATE_TIME 0x02 /* Timeout. Short or long timeout? */
#define LACP_STATE_AGG 0x04 /* Aggregation. Is the link is bondable? */
#define LACP_STATE_SYNC 0x08 /* Synchronization. Is the link in up to date? */
#define LACP_STATE_COL 0x10 /* Collecting. Is the link receiving frames? */
#define LACP_STATE_DIST 0x20 /* Distributing. Is the link sending frames? */
#define LACP_STATE_DEF 0x40 /* Defaulted. Using default partner info? */
#define LACP_STATE_EXP 0x80 /* Expired. Using expired partner info? */
#define LACP_FAST_TIME_TX 1000 /* Fast transmission rate. */
#define LACP_SLOW_TIME_TX 30000 /* Slow transmission rate. */
#define LACP_RX_MULTIPLIER 3 /* Multiply by TX rate to get RX rate. */
#define LACP_INFO_LEN 15
struct lacp_info {
ovs_be16 sys_priority; /* System priority. */
uint8_t sys_id[ETH_ADDR_LEN]; /* System ID. */
ovs_be16 key; /* Operational key. */
ovs_be16 port_priority; /* Port priority. */
ovs_be16 port_id; /* Port ID. */
uint8_t state; /* State mask. See LACP_STATE macros. */
} __attribute__((packed));
BUILD_ASSERT_DECL(LACP_INFO_LEN == sizeof(struct lacp_info));
#define LACP_PDU_LEN 110
struct lacp_pdu {
uint8_t subtype; /* Always 1. */
uint8_t version; /* Always 1. */
uint8_t actor_type; /* Always 1. */
uint8_t actor_len; /* Always 20. */
struct lacp_info actor; /* LACP actor information. */
uint8_t z1[3]; /* Reserved. Always 0. */
uint8_t partner_type; /* Always 2. */
uint8_t partner_len; /* Always 20. */
struct lacp_info partner; /* LACP partner information. */
uint8_t z2[3]; /* Reserved. Always 0. */
uint8_t collector_type; /* Always 3. */
uint8_t collector_len; /* Always 16. */
ovs_be16 collector_delay; /* Maximum collector delay. Set to UINT16_MAX. */
uint8_t z3[64]; /* Combination of several fields. Always 0. */
} __attribute__((packed));
BUILD_ASSERT_DECL(LACP_PDU_LEN == sizeof(struct lacp_pdu));
void compose_lacp_pdu(const struct lacp_info *actor,
const struct lacp_info *partner, struct lacp_pdu *);
const struct lacp_pdu *parse_lacp_packet(const struct ofpbuf *);
/* LACP Protocol Implementation. */
enum lacp_time {
LACP_TIME_FAST,
LACP_TIME_SLOW,
LACP_TIME_CUSTOM
};
struct lacp_settings {
char *name;
uint8_t id[ETH_ADDR_LEN];
uint16_t priority;
bool active;
enum lacp_time lacp_time;
long long int custom_time;
bool heartbeat;
};
void lacp_init(void);
struct lacp *lacp_create(void);
void lacp_destroy(struct lacp *);
void lacp_configure(struct lacp *, const struct lacp_settings *);
bool lacp_is_active(const struct lacp *);
void lacp_process_pdu(struct lacp *, const void *slave,
const struct lacp_pdu *);
bool lacp_negotiated(const struct lacp *);
struct lacp_slave_settings {
char *name;
uint16_t id;
uint16_t priority;
uint16_t key;
};
void lacp_slave_register(struct lacp *, void *slave_,
const struct lacp_slave_settings *);
void lacp_slave_unregister(struct lacp *, const void *slave);
void lacp_slave_carrier_changed(const struct lacp *, const void *slave);
bool lacp_slave_may_enable(const struct lacp *, const void *slave);
uint16_t lacp_slave_get_port_id(const struct lacp *, const void *slave);
bool lacp_slave_is_current(const struct lacp *, const void *slave_);
/* Callback function for lacp_run() for sending a LACP PDU. */
typedef void lacp_send_pdu(void *slave, const struct lacp_pdu *);
void lacp_run(struct lacp *, lacp_send_pdu *);
void lacp_wait(struct lacp *);
#endif /* lacp.h */
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