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Drop packets to multicast address whose scop field contains the

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reserved value 0.

MFC after:	1 week
Sponsored by:	Yandex LLC
This commit is contained in:
Andrey V. Elsukov 2014-02-13 14:10:44 +00:00
parent d4f5f0007e
commit e4c77ca0c0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=261835
1 changed files with 12 additions and 1 deletions
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13
sys/netinet6/ip6_input.c
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@ -547,7 +547,18 @@ ip6_input(struct mbuf *m)
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
IPV6_ADDR_MC_SCOPE(&ip6->ip6_dst) == 0) {
/*
* RFC4291 2.7:
* Nodes must not originate a packet to a multicast address
* whose scop field contains the reserved value 0; if such
* a packet is received, it must be silently dropped.
*/
IP6STAT_INC(ip6s_badscope);
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
#ifdef ALTQ
if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
/* packet is dropped by traffic conditioner */