commit 4a233ea65adf794e358e425a6cb9c4fde060b35c
Author: Alexander Zubkov <green@qrator.net>
Date:   Wed Sep 21 17:07:11 2022 +0200

    KRT: Fix setting default preference
    
    Changes in commit eb937358 boke setting of channel preference for alien
    routes learned during scan. The preference was set only for async routes.
    Move common attribute processing part of functions krt_learn_async() and
    krt_learn_async() to a separate function to have only one place for such
    changes.

diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index c4a3a4a8..cb0f1d4f 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -318,6 +318,15 @@ krt_learn_announce_delete(struct krt_proto *p, net *n)
   rte_update(&p->p, n->n.addr, NULL);
 }
 
+static void
+krt_learn_alien_attr(struct channel *c, rte *e)
+{
+  ASSERT(!e->attrs->cached);
+  e->attrs->pref = c->preference;
+
+  e->attrs = rta_lookup(e->attrs);
+}
+
 /* Called when alien route is discovered during scan */
 static void
 krt_learn_scan(struct krt_proto *p, rte *e)
@@ -326,7 +335,7 @@ krt_learn_scan(struct krt_proto *p, rte *e)
   net *n = net_get(p->krt_table, n0->n.addr);
   rte *m, **mm;
 
-  e->attrs = rta_lookup(e->attrs);
+  krt_learn_alien_attr(p->p.main_channel, e);
 
   for(mm=&n->routes; m = *mm; mm=&m->next)
     if (krt_same_key(m, e))
@@ -438,10 +447,7 @@ krt_learn_async(struct krt_proto *p, rte *e, int new)
   net *n = net_get(p->krt_table, n0->n.addr);
   rte *g, **gg, *best, **bestp, *old_best;
 
-  ASSERT(!e->attrs->cached);
-  e->attrs->pref = p->p.main_channel->preference;
-
-  e->attrs = rta_lookup(e->attrs);
+  krt_learn_alien_attr(p->p.main_channel, e);
 
   old_best = n->routes;
   for(gg=&n->routes; g = *gg; gg = &g->next)