Date: Thu, 19 Mar 2026 18:20:06 +0000 From: Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 56dddebc5549 - main - ip6_input: Remove unused check for IPv4-compatible IPv6 Message-ID: <69bc3e56.3b0b3.5afe9107@gitrepo.freebsd.org>
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The branch main has been updated by pouria: URL: https://cgit.FreeBSD.org/src/commit/?id=56dddebc55494fdf75eeb914cc9e345d0d762f8c commit 56dddebc55494fdf75eeb914cc9e345d0d762f8c Author: Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org> AuthorDate: 2026-03-19 18:15:10 +0000 Commit: Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org> CommitDate: 2026-03-19 18:17:53 +0000 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 --- sys/netinet6/ip6_input.c | 15 --------------- 1 file changed, 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 fallhome | help
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