mirror of
https://github.com/openvswitch/ovs
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85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
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/*
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* Copyright (c) 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CFM_H
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#define CFM_H 1
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#include <stdint.h>
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#include "hmap.h"
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#include "packets.h"
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struct flow;
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/* A 'cfm' represent a local Maintenance Point (MP) and its Connectivity Fault
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* Management (CFM) state machine. Its configuration variables should be set
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* by clients of the CFM library. */
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struct cfm {
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/* Configuration Variables. */
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uint16_t mpid; /* The MPID of this CFM. */
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uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */
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int interval; /* The requested transmission interval. */
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uint8_t eth_src[ETH_ADDR_LEN];
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/* Statistics. */
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struct hmap remote_mps; /* Expected remote MPs. */
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struct hmap x_remote_mps; /* Unexpected remote MPs. */
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struct hmap x_remote_maids; /* Unexpected remote MAIDs. */
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bool fault; /* Indicates connectivity vaults. */
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};
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/* Remote MPs represent foreign network entities that are configured to have
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* the same MAID as this CFM instance. */
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struct remote_mp {
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uint16_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */
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struct hmap_node node; /* In 'cfm' 'remote_mps' or 'x_remote_mps'. */
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long long recv_time; /* Time the most recent CCM was received. */
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bool fault; /* Indicates a connectivity fault. */
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};
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/* Remote MAIDs keep track of incoming CCM messages which have a different MAID
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* than this CFM instance. */
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struct remote_maid {
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uint8_t maid[CCM_MAID_LEN]; /* The remote MAID. */
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struct hmap_node node; /* In 'cfm' 'x_remote_maids'. */
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long long recv_time; /* Most recent receive time for this 'remote_maid'. */
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};
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struct cfm *cfm_create(void);
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void cfm_destroy(struct cfm *);
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struct ofpbuf *cfm_run(struct cfm *);
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void cfm_wait(struct cfm *);
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bool cfm_configure(struct cfm *);
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void cfm_update_remote_mps(struct cfm *, const uint16_t *mpid, size_t n_mpids);
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const struct remote_mp *cfm_get_remote_mp(const struct cfm *, uint16_t mpid);
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bool cfm_generate_maid(const char *md_name, const char *ma_name,
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uint8_t maid[CCM_MAID_LEN]);
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bool cfm_should_process_flow(const struct flow *);
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void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
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#endif /* cfm.h */
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