+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)
+ return log_error_errno(r, "Could not create RTM_DELROUTE message: %m");
+
+ if (!in_addr_is_null(route->family, &route->in_addr)) {
+ 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)
+ return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
+ }
+
+ 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)
+ return log_error_errno(r, "Could not append RTA_DST attribute: %m");
+
+ r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
+ if (r < 0)
+ return log_error_errno(r, "Could not set destination prefix length: %m");
+ }
+
+ if (route->src_prefixlen) {
+ if (route->family == AF_INET)
+ r = sd_rtnl_message_append_in_addr(req, RTA_SRC, &route->src_addr.in);
+ else if (route->family == AF_INET6)
+ r = sd_rtnl_message_append_in6_addr(req, RTA_SRC, &route->src_addr.in6);
+ if (r < 0)
+ return log_error_errno(r, "Could not append RTA_DST attribute: %m");
+
+ r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen);
+ if (r < 0)
+ return log_error_errno(r, "Could not set source prefix length: %m");
+ }
+
+ if (!in_addr_is_null(route->family, &route->prefsrc_addr)) {
+ if (route->family == AF_INET)
+ r = sd_rtnl_message_append_in_addr(req, RTA_PREFSRC, &route->prefsrc_addr.in);
+ else if (route->family == AF_INET6)
+ r = sd_rtnl_message_append_in6_addr(req, RTA_PREFSRC, &route->prefsrc_addr.in6);
+ if (r < 0)
+ return log_error_errno(r, "Could not append RTA_PREFSRC attribute: %m");
+ }
+
+ r = sd_rtnl_message_route_set_scope(req, route->scope);
+ if (r < 0)
+ return log_error_errno(r, "Could not set scope: %m");
+
+ r = sd_rtnl_message_append_u32(req, RTA_PRIORITY, route->metrics);
+ if (r < 0)
+ return log_error_errno(r, "Could not append RTA_PRIORITY attribute: %m");
+
+ r = sd_rtnl_message_append_u32(req, RTA_OIF, link->ifindex);
+ if (r < 0)
+ return log_error_errno(r, "Could not append RTA_OIF attribute: %m");
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Could not send rtnetlink message: %m");
+
+ link_ref(link);
+
+ return 0;
+}
+