IPv6 is such a lovley protocol. Add the scope_id for link local addresses
in kr6_tofull() because IPv6 just has to be "special".
Maybe we should add a scope_id to struct kroute6 but heck it is mostly the
interface index except for non link local addresses because there it has
to be 0. So this works for now.
With this link local routes show properly in bgpctl show fib output:
flags: * = valid, B = BGP, C = Connected, S = Static
N = BGP Nexthop reachable via this route
r = reject route, b = blackhole route
flags prio destination gateway
*C 1 ::1/128 link#3
*C 4 fe80::%re0/64 link#1
*C 1 fe80::1%lo0/128 link#3
*C 1 fe80::1%lo1/128 link#4
*C 4 ff01::%re0/32 link#1
*C 4 ff01::%lo0/32 link#3
*C 4 ff01::%lo1/32 link#4
*C 4 ff02::%re0/32 link#1
--
:wq Claudio
Index: kroute.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/kroute.c,v
retrieving revision 1.265
diff -u -p -r1.265 kroute.c
--- kroute.c 23 Jun 2022 07:43:37 -0000 1.265
+++ kroute.c 23 Jun 2022 07:44:53 -0000
@@ -1602,8 +1602,17 @@ kr6_tofull(struct kroute6 *kr6)
kf.prefix.aid = AID_INET6;
memcpy(&kf.prefix.v6, &kr6->prefix, sizeof(struct in6_addr));
+ /* only set scope_id for link-local addresses because IPv6 */
+ if (IN6_IS_ADDR_LINKLOCAL(&kr6->prefix) ||
+ IN6_IS_ADDR_MC_LINKLOCAL(&kr6->prefix) ||
+ IN6_IS_ADDR_MC_INTFACELOCAL(&kr6->prefix))
+ kf.prefix.scope_id = kr6->ifindex;
kf.nexthop.aid = AID_INET6;
memcpy(&kf.nexthop.v6, &kr6->nexthop, sizeof(struct in6_addr));
+ if (IN6_IS_ADDR_LINKLOCAL(&kr6->nexthop) ||
+ IN6_IS_ADDR_MC_LINKLOCAL(&kr6->nexthop) ||
+ IN6_IS_ADDR_MC_INTFACELOCAL(&kr6->nexthop))
+ kf.nexthop.scope_id = kr6->ifindex;
strlcpy(kf.label, rtlabel_id2name(kr6->labelid), sizeof(kf.label));
kf.flags = kr6->flags;
kf.ifindex = kr6->ifindex;
