network: ndisc - Also fill router preference

diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
index 7570d37662f67c2e1f31bb9fda79bdbdc0b1ce0e..61776d3c262fc43d34263dcecbb7c4dbce59fd28 100644 (file)
--- a/src/network/networkd-ndisc.c
+++ b/src/network/networkd-ndisc.c
@@ -448,10 +448,10 @@ static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *r
 
 static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
         _cleanup_(route_freep) Route *route = NULL;
+        unsigned prefixlen, preference;
         usec_t timestamp_usec;
         uint32_t lifetime_sec;
         struct in6_addr prefix;
-        unsigned prefixlen;
         int r;
 
         assert(link);
@@ -477,6 +477,11 @@ static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
         if (r < 0)
                 return log_link_warning_errno(link, r, "Failed to get prefix length: %m");
 
+        /* Prefix Information option does not have preference, hence we use the 'main' preference here */
+        r = sd_ndisc_router_get_preference(rt, &preference);
+        if (r < 0)
+                log_link_warning_errno(link, r, "Failed to get default router preference from RA: %m");
+
         r = route_new(&route);
         if (r < 0)
                 return log_oom();
@@ -484,6 +489,7 @@ static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
         route->family = AF_INET6;
         route->dst.in6 = prefix;
         route->dst_prefixlen = prefixlen;
+        route->pref = preference;
         route->lifetime_usec = sec_to_usec(lifetime_sec, timestamp_usec);
 
         r = ndisc_request_route(TAKE_PTR(route), link, rt);