diff options
| author | Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org> | 2026-03-19 18:15:10 +0000 |
|---|---|---|
| committer | Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org> | 2026-03-19 18:17:53 +0000 |
| commit | 56dddebc55494fdf75eeb914cc9e345d0d762f8c (patch) | |
| tree | da5ed1741704db6206496d96c61c5cba7cc9f694 | |
| parent | 17920f8335106487968d7928d01b34300756ea00 (diff) | |
ip6_input: Remove unused check for IPv4-compatible IPv6
IPv4-compatible IPv6 addresses are deprecated by RFC 4291.
No functional change intended.
Reviewed by: glebius, emaste
Differential Revision: https://reviews.freebsd.org/D55387
| -rw-r--r-- | sys/netinet6/ip6_input.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c index acb690c2033d..20b092cf6fd2 100644 --- a/sys/netinet6/ip6_input.c +++ b/sys/netinet6/ip6_input.c @@ -683,21 +683,6 @@ ip6_input(struct mbuf *m) in6_ifstat_inc(rcvif, ifs6_in_addrerr); goto bad; } -#if 0 - /* - * Reject packets with IPv4 compatible addresses (auto tunnel). - * - * The code forbids auto tunnel relay case in RFC1933 (the check is - * stronger than RFC1933). We may want to re-enable it if mech-xx - * is revised to forbid relaying case. - */ - if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || - IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { - IP6STAT_INC(ip6s_badscope); - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); - goto bad; - } -#endif /* * Try to forward the packet, but if we fail continue. * ip6_tryforward() does not generate redirects, so fall |