+int route_drop(Route *route, Link *link,
+ sd_rtnl_message_handler_t callback) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+ assert(link->ifindex > 0);
+ assert(route->family == AF_INET || route->family == AF_INET6);
+
+ r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
+ RTM_DELROUTE, route->family,
+ route->protocol);
+ if (r < 0) {
+ log_error("Could not create RTM_DELROUTE message: %s", strerror(-r));
+ return r;
+ }
+
+ if (route->family == AF_INET)
+ r = sd_rtnl_message_append_in_addr(req, RTA_GATEWAY, &route->in_addr.in);
+ else if (route->family == AF_INET6)
+ r = sd_rtnl_message_append_in6_addr(req, RTA_GATEWAY, &route->in_addr.in6);
+ if (r < 0) {
+ log_error("Could not append RTA_GATEWAY attribute: %s", strerror(-r));
+ return r;
+ }
+
+ if (route->dst_prefixlen) {
+ if (route->family == AF_INET)
+ r = sd_rtnl_message_append_in_addr(req, RTA_DST, &route->dst_addr.in);
+ else if (route->family == AF_INET6)
+ r = sd_rtnl_message_append_in6_addr(req, RTA_DST, &route->dst_addr.in6);
+ if (r < 0) {
+ log_error("Could not append RTA_DST attribute: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
+ if (r < 0) {
+ log_error("Could not set destination prefix length: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ r = sd_rtnl_message_route_set_scope(req, route->scope);
+ if (r < 0) {
+ log_error("Could not set scope: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_u32(req, RTA_PRIORITY, route->metrics);
+ if (r < 0) {
+ log_error("Could not append RTA_PRIORITY attribute: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_u32(req, RTA_OIF, link->ifindex);
+ if (r < 0) {
+ log_error("Could not append RTA_OIF attribute: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+ if (r < 0) {
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ link_ref(link);
+
+ return 0;
+}
+