mirror of
https://github.com/openvswitch/ovs
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b363bae4f8
Before this patch, when a tunnel is configured with key=flow, CFM didn't verify that incoming packets had the appropriate key of zero. This could cause the CFM module to consume packets which weren't actually intended for it. Bug #13542. Signed-off-by: Ethan Jackson <ethan@nicira.com>
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* Copyright (c) 2010, 2011 Nicira, Inc.
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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 "openvswitch/types.h"
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struct flow;
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struct ofpbuf;
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#define CFM_RANDOM_VLAN UINT16_MAX
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#define CFM_FAULT_REASONS \
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CFM_FAULT_REASON(RECV, recv) \
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CFM_FAULT_REASON(RDI, rdi) \
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CFM_FAULT_REASON(MAID, maid) \
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CFM_FAULT_REASON(LOOPBACK, loopback) \
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CFM_FAULT_REASON(OVERFLOW, overflow) \
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CFM_FAULT_REASON(OVERRIDE, override) \
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CFM_FAULT_REASON(INTERVAL, interval)
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enum cfm_fault_bit_index {
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#define CFM_FAULT_REASON(NAME, STR) CFM_FAULT_INDEX_##NAME,
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CFM_FAULT_REASONS
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#undef CFM_FAULT_REASON
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CFM_FAULT_N_REASONS
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};
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enum cfm_fault_reason {
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#define CFM_FAULT_REASON(NAME, STR) \
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CFM_FAULT_##NAME = 1 << CFM_FAULT_INDEX_##NAME,
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CFM_FAULT_REASONS
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#undef CFM_FAULT_REASON
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};
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struct cfm_settings {
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uint64_t mpid; /* The MPID of this CFM. */
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int interval; /* The requested transmission interval. */
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bool extended; /* Run in extended mode. */
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bool opup; /* Operational State. */
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uint16_t ccm_vlan; /* CCM Vlan tag. Zero if none.
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CFM_RANDOM_VLAN if random. */
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uint8_t ccm_pcp; /* CCM Priority. Zero if none. */
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bool check_tnl_key; /* Verify inbound packet key? */
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};
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void cfm_init(void);
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struct cfm *cfm_create(const char *name);
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void cfm_destroy(struct cfm *);
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void cfm_run(struct cfm *);
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bool cfm_should_send_ccm(struct cfm *);
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void cfm_compose_ccm(struct cfm *, struct ofpbuf *packet, uint8_t eth_src[6]);
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void cfm_wait(struct cfm *);
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bool cfm_configure(struct cfm *, const struct cfm_settings *);
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bool cfm_should_process_flow(const struct cfm *cfm, const struct flow *);
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void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
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int cfm_get_fault(const struct cfm *);
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int cfm_get_health(const struct cfm *);
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int cfm_get_opup(const struct cfm *);
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void cfm_get_remote_mpids(const struct cfm *, const uint64_t **rmps,
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size_t *n_rmps);
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const char *cfm_fault_reason_to_str(int fault);
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#endif /* cfm.h */
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