Update MTU on IPv6 routes if needed as well.

diff --git a/ipv6.c b/ipv6.c
index 73ccb8813ed384a548f3120dec4ce6ad8a32e29f..3e0f60dbb889c1df6b9d91d3fbbae97296e5a7c2 100644 (file)
--- a/ipv6.c
+++ b/ipv6.c
@@ -1847,6 +1847,7 @@ ipv6_handlert(struct dhcpcd_ctx *ctx, int cmd, struct rt6 *rt)
 static int
 nc_route(struct rt6 *ort, struct rt6 *nrt)
 {
+       int change;
 
        /* Don't set default routes if not asked to */
        if (IN6_IS_ADDR_UNSPECIFIED(&nrt->dest) &&
@@ -1856,6 +1857,7 @@ nc_route(struct rt6 *ort, struct rt6 *nrt)
 
        desc_route(ort == NULL ? "adding" : "changing", nrt);
 
+       change = 0;
        if (ort == NULL) {
                ort = ipv6_findrt(nrt->iface->ctx, nrt, 0);
                if (ort &&
@@ -1865,7 +1867,27 @@ nc_route(struct rt6 *ort, struct rt6 *nrt)
                    ort->metric == nrt->metric &&
 #endif
                    IN6_ARE_ADDR_EQUAL(&ort->gate, &nrt->gate))))
+               {
+                       if (ort->mtu == nrt->mtu)
+                               return 0;
+                       change = 1;
+               }
+       }
+
+#ifdef RTF_CLONING
+       /* BSD can set routes to be cloning routes.
+        * Cloned routes inherit the parent flags.
+        * As such, we need to delete and re-add the route to flush children
+        * to correct the flags. */
+       if (change && ort != NULL && ort->flags & RTF_CLONING)
+               change = 0;
+#endif
+
+       if (change) {
+               if (if_route6(RTM_CHANGE, nrt) == 0)
                        return 0;
+               if (errno != ESRCH)
+                       logger(nrt->iface->ctx, LOG_ERR, "if_route6 (CHG): %m");
        }
 
 #ifdef HAVE_ROUTE_METRIC