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Add debugging sysctl to disable incoming MLD v2 messages similar to the

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existing sysctl for MLD v1 messages.

PR:			233535
Differential Revision:	https://reviews.freebsd.org/D18887
Reviewed by:		bz (net)
Tested by:		ae
MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
hselasky 2019-01-24 08:18:02 +00:00
parent e42cfab759
commit c9ba3bd6b3
1 changed files with 12 additions and 1 deletions
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13
sys/netinet6/mld6.c
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@ -243,6 +243,10 @@ static int mld_v1enable = 1;
SYSCTL_INT(_net_inet6_mld, OID_AUTO, v1enable, CTLFLAG_RWTUN,
&mld_v1enable, 0, "Enable fallback to MLDv1");
static int mld_v2enable = 1;
SYSCTL_INT(_net_inet6_mld, OID_AUTO, v2enable, CTLFLAG_RWTUN,
&mld_v2enable, 0, "Enable MLDv2");
static int mld_use_allow = 1;
SYSCTL_INT(_net_inet6_mld, OID_AUTO, use_allow, CTLFLAG_RWTUN,
&mld_use_allow, 0, "Use ALLOW/BLOCK for RFC 4604 SSM joins/leaves");
@ -817,7 +821,12 @@ mld_v2_input_query(struct ifnet *ifp, const struct ip6_hdr *ip6,
char ip6tbuf[INET6_ADDRSTRLEN];
#endif
is_general_query = 0;
if (!mld_v2enable) {
CTR3(KTR_MLD, "ignore v2 query src %s on ifp %p(%s)",
ip6_sprintf(ip6tbuf, &ip6->ip6_src),
ifp, if_name(ifp));
return (0);
}
/*
* RFC3810 Section 6.2: MLD queries must originate from
@ -830,6 +839,8 @@ mld_v2_input_query(struct ifnet *ifp, const struct ip6_hdr *ip6,
return (0);
}
is_general_query = 0;
CTR2(KTR_MLD, "input v2 query on ifp %p(%s)", ifp, if_name(ifp));
mld = (struct mldv2_query *)(mtod(m, uint8_t *) + off);