From: Pali Rohár <pali@kernel.org>
Date: Sun, 10 Jan 2021 17:51:23 +0000 (+0100)
Subject: pppd: Fix setting flags of IPv6 peer address
X-Git-Tag: ppp-2.5.0~85^2~3
X-Git-Url: http://git.ozlabs.org/?a=commitdiff_plain;h=c4d488788a3ed8fba3e75c9ddd632d1f98e9ac77;hp=98ec18f098e5ef68e3a8cc6954fcaf5a7fb8b7be;p=ppp.git

pppd: Fix setting flags of IPv6 peer address

Address is link-local (not globaly routable) and is permanent (not dynamic
from stateless address configuration).

Signed-off-by: Pali Rohár <pali@kernel.org>
---

diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c
index 50c4f2d..a7508fe 100644
--- a/pppd/sys-linux.c
+++ b/pppd/sys-linux.c
@@ -2885,8 +2885,8 @@ static int append_peer_ipv6_address(unsigned int iface, struct in6_addr *local_a
     ifa = NLMSG_DATA(nlmsg);
     ifa->ifa_family = AF_INET6;
     ifa->ifa_prefixlen = 128;
-    ifa->ifa_flags = 0;
-    ifa->ifa_scope = RT_SCOPE_UNIVERSE;
+    ifa->ifa_flags = IFA_F_PERMANENT;
+    ifa->ifa_scope = RT_SCOPE_LINK;
     ifa->ifa_index = iface;
 
     local_rta = IFA_RTA(ifa);