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/*
* Copyright (c) 2010 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 CFM_H
#define CFM_H 1
#include <stdint.h>
#include "hmap.h"
#include "packets.h"
struct flow;
/* A 'cfm' represent a local Maintenance Point (MP) and its Connectivity Fault
* Management (CFM) state machine. Its configuration variables should be set
* by clients of the CFM library. */
struct cfm {
/* Configuration Variables. */
uint16_t mpid; /* The MPID of this CFM. */
uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */
int interval; /* The requested transmission interval. */
uint8_t eth_src[ETH_ADDR_LEN];
/* Statistics. */
struct hmap remote_mps; /* Expected remote MPs. */
struct hmap x_remote_mps; /* Unexpected remote MPs. */
struct hmap x_remote_maids; /* Unexpected remote MAIDs. */
bool fault; /* Indicates connectivity vaults. */
};
/* Remote MPs represent foreign network entities that are configured to have
* the same MAID as this CFM instance. */
struct remote_mp {
uint16_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */
struct hmap_node node; /* In 'cfm' 'remote_mps' or 'x_remote_mps'. */
long long recv_time; /* Time the most recent CCM was received. */
bool fault; /* Indicates a connectivity fault. */
};
/* Remote MAIDs keep track of incoming CCM messages which have a different MAID
* than this CFM instance. */
struct remote_maid {
uint8_t maid[CCM_MAID_LEN]; /* The remote MAID. */
struct hmap_node node; /* In 'cfm' 'x_remote_maids'. */
long long recv_time; /* Most recent receive time for this 'remote_maid'. */
};
struct cfm *cfm_create(void);
void cfm_destroy(struct cfm *);
struct ofpbuf *cfm_run(struct cfm *);
void cfm_wait(struct cfm *);
bool cfm_configure(struct cfm *);
void cfm_update_remote_mps(struct cfm *, const uint16_t *mpid, size_t n_mpids);
const struct remote_mp *cfm_get_remote_mp(const struct cfm *, uint16_t mpid);
bool cfm_generate_maid(const char *md_name, const char *ma_name,
uint8_t maid[CCM_MAID_LEN]);
bool cfm_should_process_flow(const struct flow *);
void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
#endif /* cfm.h */
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