+static int link_enter_configured(Link *link) {
+ log_info("Link '%s' configured", link->ifname);
+
+ link->state = LINK_STATE_CONFIGURED;
+
+ return 0;
+}
+
+static int link_enter_failed(Link *link) {
+ link->state = LINK_STATE_FAILED;
+
+ return 0;
+}
+
+static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_warning("Could not set route on interface '%s': %s",
+ link->ifname, strerror(-r));
+
+ if (link->rtnl_messages == 0) {
+ log_info("Routes set for link '%s'", link->ifname);
+ link_enter_configured(link);
+ }
+
+ return 1;
+}
+
+static int link_enter_set_routes(Link *link) {
+ Route *route;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+ assert(link->state == LINK_STATE_ADDRESSES_SET);
+
+ link->state = LINK_STATE_SET_ROUTES;
+
+ if (!link->network->routes)
+ return link_enter_configured(link);
+
+ LIST_FOREACH(routes, route, link->network->routes) {
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning("Could not set routes for link '%s'", link->ifname);
+ return link_enter_failed(link);
+ }
+
+ link->rtnl_messages ++;
+ }
+
+ return 0;
+}
+
+static int link_enter_addresses_set(Link *link) {
+ link->state = LINK_STATE_ADDRESSES_SET;
+
+ return link_enter_set_routes(link);
+}
+
+static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_warning("Could not set address on interface '%s': %s",
+ link->ifname, strerror(-r));
+
+ if (link->rtnl_messages == 0) {
+ log_info("Addresses set for link '%s'", link->ifname);
+ link_enter_addresses_set(link);
+ }
+
+ return 1;
+}
+
+static int link_enter_set_addresses(Link *link) {
+ Address *address;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+
+ if (!link->network->addresses)
+ return link_enter_addresses_set(link);
+
+ link->state = LINK_STATE_SET_ADDRESSES;
+
+ LIST_FOREACH(addresses, address, link->network->addresses) {
+ r = address_configure(address, link, &address_handler);
+ if (r < 0) {
+ log_warning("Could not set addresses for link '%s'", link->ifname);
+ return link_enter_failed(link);
+ }
+
+ link->rtnl_messages ++;
+ }
+
+ return 0;
+}
+
+static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("Could not bring up interface '%s': %s",
+ link->ifname, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ return 1;
+}
+
+static int link_get(Link *link) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
+ r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, 0, 0, &req);
+ if (r < 0) {
+ log_error("Could not allocate RTM_GETLINK message");
+ return r;
+ }
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL);
+ if (r < 0) {
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ return 0;
+}
+
+static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("Could not bring up interface '%s': %s",
+ link->ifname, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ return 1;
+}
+
+static int link_up(Link *link) {