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mcast-snooping: Add Multicast Listener Discovery support

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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>
This commit is contained in:
Thadeu Lima de Souza Cascardo
2015-07-01 16:12:12 -03:00
committed by Ben Pfaff
parent 964a4d5fd5
commit 06994f879c
8 changed files with 220 additions and 17 deletions
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25
lib/flow.h
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@@ -758,6 +758,31 @@ static inline bool is_icmpv6(const struct flow *flow)
&& flow->nw_proto == IPPROTO_ICMPV6);
}
static inline bool is_igmp(const struct flow *flow)
{
return (flow->dl_type == htons(ETH_TYPE_IP)
&& flow->nw_proto == IPPROTO_IGMP);
}
static inline bool is_mld(const struct flow *flow)
{
return is_icmpv6(flow)
&& (flow->tp_src == htons(MLD_QUERY)
|| flow->tp_src == htons(MLD_REPORT)
|| flow->tp_src == htons(MLD_DONE)
|| flow->tp_src == htons(MLD2_REPORT));
}
static inline bool is_mld_query(const struct flow *flow)
{
return is_icmpv6(flow) && flow->tp_src == htons(MLD_QUERY);
}
static inline bool is_mld_report(const struct flow *flow)
{
return is_mld(flow) && !is_mld_query(flow);
}
static inline bool is_stp(const struct flow *flow)
{
return (eth_addr_equals(flow->dl_dst, eth_addr_stp)