The branch main has been updated by melifaro:
URL:
https://cgit.FreeBSD.org/src/commit/?id=e58c8da0683dcff6ce3432bdfa98f7271140cda3
commit e58c8da0683dcff6ce3432bdfa98f7271140cda3
Author: Alexander V. Chernikov <melif...@freebsd.org>
AuthorDate: 2021-01-12 23:14:03 +0000
Commit: Alexander V. Chernikov <melif...@freebsd.org>
CommitDate: 2021-01-13 10:03:15 +0000
Map IPv6 link-local prefix to the link-local ifa.
Currently we create link-local route by creating an always-on IPv6 prefix
in the prefix list. This prefix is not tied to the link-local ifa.
This leads to the following problems:
First, when flushing interface addresses we skip on-link route, leaving
fe80::/64 prefix on the interface without any IPv6 addresses.
Second, when creating and removing link-local alias we lose fe80::/64 prefix
from the routing table.
Fix this by attaching link-local prefix to the ifa at the initial creation.
Reviewed by: hrs
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D28129
---
sys/netinet6/in6_ifattach.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sys/netinet6/in6_ifattach.c b/sys/netinet6/in6_ifattach.c
index 81cd24823f10..1a07fb13b179 100644
--- a/sys/netinet6/in6_ifattach.c
+++ b/sys/netinet6/in6_ifattach.c
@@ -520,8 +520,11 @@ in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet
*altifp)
* valid with referring to the old link-local address.
*/
if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
- if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
+ if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
return (error);
+ /* Reference prefix */
+ ia->ia6_ndpr = pr;
+ pr->ndpr_addrcnt++;
} else
nd6_prefix_rele(pr);
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