lib/waiter: Add timeout waiters

[petitboot] / discover / discover-server.c

diff --git a/discover/discover-server.c b/discover/discover-server.c
index 9f6e7daaa6793b40f8389ef69ee22edb35498d5d..67ce266c4c433fced328f810360094cd8e60f10f 100644 (file)
--- a/discover/discover-server.c
+++ b/discover/discover-server.c
@@ -31,6 +31,7 @@ struct discover_server {
 struct client {
        struct discover_server *server;
        struct list_item list;
+       struct waiter *waiter;
        int fd;
 };
 
@@ -55,6 +56,9 @@ static int client_destructor(void *arg)
        if (client->fd >= 0)
                close(client->fd);
 
+       if (client->waiter)
+               waiter_remove(client->waiter);
+
        list_remove(&client->list);
 
        return 0;
@@ -145,6 +149,24 @@ static int write_device_remove_message(struct discover_server *server,
        return client_write_message(server, client, message);
 }
 
+static int write_boot_status_message(struct discover_server *server,
+               struct client *client, const struct boot_status *status)
+{
+       struct pb_protocol_message *message;
+       int len;
+
+       len = pb_protocol_boot_status_len(status);
+
+       message = pb_protocol_create_message(client,
+                       PB_PROTOCOL_ACTION_STATUS, len);
+       if (!message)
+               return -1;
+
+       pb_protocol_serialise_boot_status(status, message->payload, len);
+
+       return client_write_message(server, client, message);
+}
+
 static int discover_server_process_message(void *arg)
 {
        struct pb_protocol_message *message;
@@ -154,8 +176,11 @@ static int discover_server_process_message(void *arg)
 
        message = pb_protocol_read_message(client, client->fd);
 
-       if (!message)
+       if (!message) {
+               talloc_free(client);
                return 0;
+       }
+
 
        if (message->action != PB_PROTOCOL_ACTION_BOOT) {
                pb_log("%s: invalid action %d\n", __func__, message->action);
@@ -178,18 +203,18 @@ static int discover_server_process_message(void *arg)
 static int discover_server_process_connection(void *arg)
 {
        struct discover_server *server = arg;
+       int fd, rc, i, n_devices;
        struct client *client;
-       int fd, i, n_devices;
 
        /* accept the incoming connection */
        fd = accept(server->socket, NULL, 0);
-       if (!fd) {
+       if (fd < 0) {
                pb_log("accept: %s\n", strerror(errno));
                return 0;
        }
 
        /* add to our list of clients */
-       client = talloc(server, struct client);
+       client = talloc_zero(server, struct client);
        list_add(&server->clients, &client->list);
 
        talloc_set_destructor(client, client_destructor);
@@ -200,19 +225,25 @@ static int discover_server_process_connection(void *arg)
        /* send existing devices to client */
        n_devices = device_handler_get_device_count(server->device_handler);
        for (i = 0; i < n_devices; i++) {
-               const struct device *device;
-               struct boot_option *opt;
+               const struct discover_boot_option *opt;
+               const struct discover_device *device;
 
                device = device_handler_get_device(server->device_handler, i);
-               write_device_add_message(server, client, device);
-
-               list_for_each_entry(&device->boot_options, opt, list)
-                       discover_server_notify_boot_option_add(server, opt);
-
+               rc = write_device_add_message(server, client, device->device);
+               if (rc)
+                       return 0;
+
+               list_for_each_entry(&device->boot_options, opt, list) {
+                       rc = write_boot_option_add_message(server, client,
+                                       opt->option);
+                       if (rc)
+                               return 0;
+               }
        }
 
-       waiter_register(server->waitset, client->fd, WAIT_IN,
-                       discover_server_process_message, client);
+       client->waiter = waiter_register_io(server->waitset, client->fd,
+                               WAIT_IN, discover_server_process_message,
+                               client);
 
        return 0;
 }
@@ -246,6 +277,15 @@ void discover_server_notify_device_remove(struct discover_server *server,
 
 }
 
+void discover_server_notify_boot_status(struct discover_server *server,
+               struct boot_status *status)
+{
+       struct client *client;
+
+       list_for_each_entry(&server->clients, client, list)
+               write_boot_status_message(server, client, status);
+}
+
 void discover_server_set_device_source(struct discover_server *server,
                struct device_handler *handler)
 {
@@ -288,7 +328,7 @@ struct discover_server *discover_server_init(struct waitset *waitset)
                goto out_err;
        }
 
-       server->waiter = waiter_register(server->waitset, server->socket,
+       server->waiter = waiter_register_io(server->waitset, server->socket,
                        WAIT_IN, discover_server_process_connection, server);
 
        return server;