diff options
| author | ae <ae@FreeBSD.org> | 2014-02-13 14:10:44 +0000 |
|---|---|---|
| committer | ae <ae@FreeBSD.org> | 2014-02-13 14:10:44 +0000 |
| commit | 6fb6c5eabc236ca2152b864573603944b349d306 (patch) | |
| tree | 10936399436b9ad72e19c933609b0a0cafeb073a /sys/netinet6/ip6_input.c | |
| parent | 2a976cbc56853664acd2de0046fdb5eded04f60f (diff) | |
| download | FreeBSD-src-6fb6c5eabc236ca2152b864573603944b349d306.zip FreeBSD-src-6fb6c5eabc236ca2152b864573603944b349d306.tar.gz | |
Drop packets to multicast address whose scop field contains the
reserved value 0.
MFC after: 1 week
Sponsored by: Yandex LLC
Diffstat (limited to 'sys/netinet6/ip6_input.c')
| -rw-r--r-- | sys/netinet6/ip6_input.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c index 2aa3177..920b9bb 100644 --- a/sys/netinet6/ip6_input.c +++ b/sys/netinet6/ip6_input.c @@ -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 */ |
