Author: kevans
Date: Mon Sep 7 23:20:02 2020
New Revision: 365434
URL: https://svnweb.freebsd.org/changeset/base/365434
Log:
MFC r364982: ipv6: quit dropping packets looping back on p2p interfaces
PR: 247718
Modified:
stable/12/sys/netinet6/ip6_forward.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/netinet6/ip6_forward.c
==============================================================================
--- stable/12/sys/netinet6/ip6_forward.c Mon Sep 7 21:37:16 2020
(r365433)
+++ stable/12/sys/netinet6/ip6_forward.c Mon Sep 7 23:20:02 2020
(r365434)
@@ -257,24 +257,8 @@ again2:
* modified by a redirect.
*/
if (V_ip6_sendredirects && rt->rt_ifp == m->m_pkthdr.rcvif && !srcrt &&
- (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0) {
- if ((rt->rt_ifp->if_flags & IFF_POINTOPOINT) != 0) {
- /*
- * If the incoming interface is equal to the outgoing
- * one, and the link attached to the interface is
- * point-to-point, then it will be highly probable
- * that a routing loop occurs. Thus, we immediately
- * drop the packet and send an ICMPv6 error message.
- *
- * type/code is based on suggestion by Rich Draves.
- * not sure if it is the best pick.
- */
- icmp6_error(mcopy, ICMP6_DST_UNREACH,
- ICMP6_DST_UNREACH_ADDR, 0);
- goto bad;
- }
+ (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0)
type = ND_REDIRECT;
- }
/*
* Fake scoped addresses. Note that even link-local source or
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