network: introduce {address,route}_remove_and_drop()

Preparation for later commits.

src/network/networkd-address.c

@@ -765,6 +765,18 @@ int address_remove(Address *address) {
         return 0;
 }
 
+int address_remove_and_drop(Address *address) {
+        if (!address)
+                return 0;
+
+        address_cancel_request(address);
+
+        if (address_exists(address))
+                return address_remove(address);
+
+        return address_drop(address);
+}
+
 bool link_address_is_dynamic(const Link *link, const Address *address) {
         Route *route;
 

src/network/networkd-address.h

@@ -78,6 +78,7 @@ Address* address_free(Address *address);
 int address_get(Link *link, const Address *in, Address **ret);
 int address_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg);
 int address_remove(Address *address);
+int address_remove_and_drop(Address *address);
 int address_dup(const Address *src, Address **ret);
 bool address_is_ready(const Address *a);
 void address_set_broadcast(Address *a, Link *link);

src/network/networkd-route.c

@@ -781,6 +781,21 @@ int route_remove(Route *route) {
         return 0;
 }
 
+int route_remove_and_drop(Route *route) {
+        if (!route)
+                return 0;
+
+        route_cancel_request(route, NULL);
+
+        if (route_exists(route))
+                return route_remove(route);
+
+        if (route->state == 0)
+                route_free(route);
+
+        return 0;
+}
+
 static void manager_mark_routes(Manager *manager, bool foreign, const Link *except) {
         Route *route;
         Link *link;

src/network/networkd-route.h

@@ -85,6 +85,7 @@ int route_dup(const Route *src, Route **ret);
 
 int route_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg);
 int route_remove(Route *route);
+int route_remove_and_drop(Route *route);
 
 int route_get(Manager *manager, Link *link, const Route *in, Route **ret);