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https://github.com/openvswitch/ovs
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06994f879c
Add support for MLDv1 and MLDv2. The behavior is not that different from IGMP. Packets to all-hosts address and queries are always flooded, reports go to routers, routers are added when a query is observed, and all MLD packets go through slow path. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com> Cc: Flavio Leitner <fbl@redhat.com> Cc: Ben Pfaff <blp@nicira.com> [blp@nicira.com moved an assignment out of an 'if' statement] Signed-off-by: Ben Pfaff <blp@nicira.com>
219 lines
7.2 KiB
C
219 lines
7.2 KiB
C
/*
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* Copyright (c) 2014 Red Hat, Inc.
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*
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* Based on mac-learning implementation.
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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 MCAST_SNOOPING_H
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#define MCAST_SNOOPING_H 1
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#include <time.h>
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#include "dp-packet.h"
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#include "hmap.h"
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#include "list.h"
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#include "ovs-atomic.h"
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#include "ovs-thread.h"
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#include "packets.h"
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#include "timeval.h"
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struct mcast_snooping;
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/* Default maximum size of a mcast snooping table, in entries. */
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#define MCAST_DEFAULT_MAX_ENTRIES 2048
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/* Time, in seconds, before expiring a mcast_group due to inactivity. */
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#define MCAST_ENTRY_DEFAULT_IDLE_TIME 300
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/* Time, in seconds, before expiring a mrouter_port due to inactivity. */
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#define MCAST_MROUTER_PORT_IDLE_TIME 180
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/* Multicast group entry.
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* Guarded by owning 'mcast_snooping''s rwlock. */
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struct mcast_group {
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/* Node in parent struct mcast_snooping hmap. */
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struct hmap_node hmap_node;
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/* Multicast group IPv6/IPv4 address. */
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struct in6_addr addr;
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/* VLAN tag. */
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uint16_t vlan;
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/* Node in parent struct mcast_snooping group_lru. */
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struct ovs_list group_node OVS_GUARDED;
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/* Contains struct mcast_group_bundle (ports), least recently used
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* at the front, most recently used at the back. */
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struct ovs_list bundle_lru OVS_GUARDED;
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};
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/* The bundle associated to the multicast group.
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* Guarded by owning 'mcast_snooping''s rwlock. */
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struct mcast_group_bundle {
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/* Node in parent struct mcast_group bundle_lru list. */
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struct ovs_list bundle_node OVS_GUARDED;
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/* When this node expires. */
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time_t expires;
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/* Learned port. */
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void *port OVS_GUARDED;
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};
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/* The bundle connected to a multicast router.
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* Guarded by owning 'mcast_snooping''s rwlock. */
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struct mcast_mrouter_bundle {
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/* Node in parent struct mcast_group mrouter_lru list. */
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struct ovs_list mrouter_node OVS_GUARDED;
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/* When this node expires. */
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time_t expires;
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/* VLAN tag. */
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uint16_t vlan;
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/* Learned port. */
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void *port OVS_GUARDED;
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};
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/* The bundle to send multicast traffic or Reports.
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* Guarded by owning 'mcast_snooping''s rwlock */
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struct mcast_port_bundle {
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/* Node in parent struct mcast_snooping. */
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struct ovs_list node;
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/* VLAN tag. */
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uint16_t vlan;
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/* Learned port. */
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void *port;
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};
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/* Multicast snooping table. */
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struct mcast_snooping {
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/* Snooping/learning table. */
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struct hmap table;
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/* Contains struct mcast_group, least recently used at the front,
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* most recently used at the back. */
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struct ovs_list group_lru OVS_GUARDED;
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/* Contains struct mcast_mrouter_bundle, least recently used at the
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* front, most recently used at the back. */
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struct ovs_list mrouter_lru OVS_GUARDED;
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/* Contains struct mcast_port_bundle to be flooded with multicast
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* packets in no special order. */
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struct ovs_list fport_list OVS_GUARDED;
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/* Contains struct mcast_port_bundle to forward Reports in
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* no special order. */
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struct ovs_list rport_list OVS_GUARDED;
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/* Secret for randomizing hash table. */
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uint32_t secret;
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/* Maximum age before deleting an entry. */
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unsigned int idle_time;
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/* Maximum number of multicast groups learned. */
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size_t max_entries;
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/* True if flow revalidation is needed. */
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bool need_revalidate;
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/* True if unregistered multicast packets should be flooded to all
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* ports, otherwise send them to ports connected to multicast routers. */
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bool flood_unreg;
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struct ovs_refcount ref_cnt;
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struct ovs_rwlock rwlock;
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};
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/* Basics. */
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bool mcast_snooping_enabled(const struct mcast_snooping *ms);
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bool mcast_snooping_flood_unreg(const struct mcast_snooping *ms);
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int mcast_mrouter_age(const struct mcast_snooping *ms,
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const struct mcast_mrouter_bundle *m);
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int mcast_bundle_age(const struct mcast_snooping *ms,
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const struct mcast_group_bundle *b);
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struct mcast_snooping *mcast_snooping_create(void);
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struct mcast_snooping *mcast_snooping_ref(const struct mcast_snooping *);
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void mcast_snooping_unref(struct mcast_snooping *);
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bool mcast_snooping_run(struct mcast_snooping *ms);
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void mcast_snooping_wait(struct mcast_snooping *ms);
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/* Configuration. */
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void mcast_snooping_set_idle_time(struct mcast_snooping *ms,
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unsigned int idle_time)
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OVS_REQ_WRLOCK(ms->rwlock);
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void mcast_snooping_set_max_entries(struct mcast_snooping *ms,
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size_t max_entries)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool
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mcast_snooping_set_flood_unreg(struct mcast_snooping *ms, bool enable)
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OVS_REQ_WRLOCK(ms->rwlock);
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void mcast_snooping_set_port_flood(struct mcast_snooping *ms, void *port,
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bool flood)
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OVS_REQ_WRLOCK(ms->rwlock);
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void mcast_snooping_set_port_flood_reports(struct mcast_snooping *ms,
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void *port, bool flood)
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OVS_REQ_WRLOCK(ms->rwlock);
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/* Lookup. */
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struct mcast_group *
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mcast_snooping_lookup(const struct mcast_snooping *ms,
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const struct in6_addr *dip, uint16_t vlan)
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OVS_REQ_RDLOCK(ms->rwlock);
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struct mcast_group *
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mcast_snooping_lookup4(const struct mcast_snooping *ms, ovs_be32 ip4,
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uint16_t vlan)
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OVS_REQ_RDLOCK(ms->rwlock);
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/* Learning. */
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bool mcast_snooping_add_group(struct mcast_snooping *ms,
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const struct in6_addr *addr,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool mcast_snooping_add_group4(struct mcast_snooping *ms, ovs_be32 ip4,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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int mcast_snooping_add_report(struct mcast_snooping *ms,
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const struct dp_packet *p,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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int mcast_snooping_add_mld(struct mcast_snooping *ms,
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const struct dp_packet *p,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool mcast_snooping_leave_group(struct mcast_snooping *ms,
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const struct in6_addr *addr,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool mcast_snooping_leave_group4(struct mcast_snooping *ms, ovs_be32 ip4,
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uint16_t vlan, void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool mcast_snooping_add_mrouter(struct mcast_snooping *ms, uint16_t vlan,
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void *port)
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OVS_REQ_WRLOCK(ms->rwlock);
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bool mcast_snooping_is_query(ovs_be16 igmp_type);
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bool mcast_snooping_is_membership(ovs_be16 igmp_type);
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/* Flush. */
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void mcast_snooping_mdb_flush(struct mcast_snooping *ms);
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void mcast_snooping_flush(struct mcast_snooping *ms);
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#endif /* mcast-snooping.h */
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