+static int link_enter_configured(Link *link) {
+ assert(link);
+ assert(link->state == LINK_STATE_SETTING_ROUTES);
+
+ log_info("%s: link configured", link->ifname);
+
+ link->state = LINK_STATE_CONFIGURED;
+
+ return 0;
+}
+
+static void link_enter_failed(Link *link) {
+ assert(link);
+
+ log_warning("%s: failed", link->ifname);
+
+ link->state = LINK_STATE_FAILED;
+}
+
+static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->route_messages > 0);
+ assert(link->state == LINK_STATE_SETTING_ADDRESSES ||
+ link->state == LINK_STATE_SETTING_ROUTES ||
+ link->state == LINK_STATE_FAILED);
+
+ link->route_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_warning("%s: could not set route: %s",
+ link->ifname, strerror(-r));
+
+ /* we might have received an old reply after moving back to SETTING_ADDRESSES,
+ * ignore it */
+ if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) {
+ log_debug("%s: routes set", 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->state == LINK_STATE_SETTING_ADDRESSES);
+
+ link->state = LINK_STATE_SETTING_ROUTES;
+
+ if (!link->network->static_routes && !link->dhcp_route)
+ return link_enter_configured(link);
+
+ log_debug("%s: setting routes", link->ifname);
+
+ LIST_FOREACH(static_routes, route, link->network->static_routes) {
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning("%s: could not set routes", link->ifname);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->route_messages ++;
+ }
+
+ if (link->dhcp_route) {
+ r = route_configure(link->dhcp_route, link, &route_handler);
+ if (r < 0) {
+ log_warning("%s: could not set routes", link->ifname);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->route_messages ++;
+ }
+
+ return 0;
+}
+
+static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+ assert(link->addr_messages > 0);
+ assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED);
+
+ link->addr_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_warning("%s: could not set address: %s",
+ link->ifname, strerror(-r));
+
+ if (link->addr_messages == 0) {
+ log_debug("%s: addresses set", link->ifname);
+ link_enter_set_routes(link);
+ }
+
+ return 1;
+}
+
+static int link_enter_set_addresses(Link *link) {
+ Address *address;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->state != _LINK_STATE_INVALID);
+
+ link->state = LINK_STATE_SETTING_ADDRESSES;
+
+ if (!link->network->static_addresses && !link->dhcp_address)
+ return link_enter_set_routes(link);
+
+ log_debug("%s: setting addresses", link->ifname);
+
+ LIST_FOREACH(static_addresses, address, link->network->static_addresses) {
+ r = address_configure(address, link, &address_handler);
+ if (r < 0) {
+ log_warning("%s: could not set addresses", link->ifname);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->addr_messages ++;
+ }
+
+ if (link->dhcp_address) {
+ r = address_configure(link->dhcp_address, link, &address_handler);
+ if (r < 0) {
+ log_warning("%s: could not set addresses", link->ifname);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->addr_messages ++;
+ }
+
+ 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("%s: could not bring up interface: %s",
+ link->ifname, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ return 1;
+}
+
+static int link_up(Link *link) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
+ log_debug("%s: bringing up link", link->ifname);
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req);
+ if (r < 0) {
+ log_error("Could not allocate RTM_SETLINK message");
+ return r;
+ }
+
+ r = sd_rtnl_message_link_set_flags(req, IFF_UP);
+ if (r < 0) {
+ log_error("Could not set link flags");
+ return r;
+ }
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
+ if (r < 0) {
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ return 0;
+}
+
+static int link_bridge_joined(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->state == LINK_STATE_JOINING_BRIDGE);
+ assert(link->network);
+
+ r = link_up(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
+
+ if (!link->network->dhcp) {
+ r = link_enter_set_addresses(link);
+ if (r < 0)
+ link_enter_failed(link);
+ return r;
+ }
+
+ return 0;
+}
+
+static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED);
+ assert(link->network);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("%s: could not join bridge '%s': %s",
+ link->ifname, link->network->bridge->name, strerror(-r));
+ link_enter_failed(link);
+ return 1;
+ } else
+ log_debug("%s: joined bridge '%s'",
+ link->ifname, link->network->bridge->name);
+
+ link_bridge_joined(link);
+
+ return 1;
+}
+
+static int link_enter_join_bridge(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->state == _LINK_STATE_INVALID);
+
+ link->state = LINK_STATE_JOINING_BRIDGE;
+
+ if (!link->network->bridge)
+ return link_bridge_joined(link);
+
+ log_debug("%s: joining bridge", link->ifname);
+
+ r = bridge_join(link->network->bridge, link, &bridge_handler);
+ if (r < 0) {
+ log_warning("%s: could not join bridge '%s'", link->ifname,
+ link->network->bridge->name);
+ link_enter_failed(link);
+ return r;
+ }
+
+ 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("%s: could not get state: %s",
+ link->ifname, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ link_update(link, m);
+
+ return 1;
+}
+
+static int link_get(Link *link) {