ui/common: Add code to send cancel-default messages
[petitboot] / ui / common / discover-client.c
index 47c57cb11bc69d49e69467cbe0b259e8c07069c5..ae5d5cd2e50b00e03cfca47b41fb6b0c8e23d0eb 100644 (file)
@@ -1,4 +1,5 @@
 
+#include <assert.h>
 #include <errno.h>
 #include <unistd.h>
 #include <stdlib.h>
@@ -10,9 +11,9 @@
 #include <asm/byteorder.h>
 
 #include <talloc/talloc.h>
-#include <log.h>
+#include <log/log.h>
 
-#include "ui/common/discover-client.h"
+#include "discover-client.h"
 #include "pb-protocol/pb-protocol.h"
 
 struct discover_client {
@@ -32,55 +33,26 @@ static int discover_client_destructor(void *arg)
        return 0;
 }
 
-struct discover_client* discover_client_init(
-       const struct discover_client_ops *ops)
+void discover_client_destroy(struct discover_client *client)
 {
-       struct discover_client *client;
-       struct sockaddr_un addr;
-
-       client = talloc(NULL, struct discover_client);
-       if (!client)
-               return NULL;
-
-       memcpy(&client->ops, ops, sizeof(client->ops));
-
-       client->fd = socket(AF_UNIX, SOCK_STREAM, 0);
-       if (!client->fd < 0) {
-               pb_log("%s: socket: %s\n", __func__, strerror(errno));
-               goto out_err;
-       }
-
-       talloc_set_destructor(client, discover_client_destructor);
-
-       client->n_devices = 0;
-       client->devices = NULL;
-
-       addr.sun_family = AF_UNIX;
-       strcpy(addr.sun_path, PB_SOCKET_PATH);
-
-       if (connect(client->fd, (struct sockaddr *)&addr, sizeof(addr))) {
-               pb_log("%s: connect: %s\n", __func__, strerror(errno));
-               goto out_err;
-       }
-
-       return client;
-
-out_err:
        talloc_free(client);
-       return NULL;
 }
 
-int discover_client_get_fd(const struct discover_client *client)
+static struct device *find_device(struct discover_client *client,
+               const char *id)
 {
-       return client->fd;
-}
+       int i;
 
-void discover_client_destroy(struct discover_client *client)
-{
-       talloc_free(client);
+       for (i = 0; i < client->n_devices; i++) {
+               struct device *dev = client->devices[i];
+               if (!strcmp(dev->id, id))
+                       return dev;
+       }
+
+       return NULL;
 }
 
-static void add_device(struct discover_client *client, struct device *device)
+static void device_add(struct discover_client *client, struct device *device)
 {
        client->n_devices++;
        client->devices = talloc_realloc(client, client->devices,
@@ -89,10 +61,28 @@ static void add_device(struct discover_client *client, struct device *device)
        client->devices[client->n_devices - 1] = device;
        talloc_steal(client, device);
 
-       client->ops.add_device(device, client->ops.cb_arg);
+       if (client->ops.device_add)
+               client->ops.device_add(device, client->ops.cb_arg);
 }
 
-static void remove_device(struct discover_client *client, const char *id)
+static void boot_option_add(struct discover_client *client,
+               struct boot_option *opt)
+{
+       struct device *dev;
+
+       dev = find_device(client, opt->device_id);
+
+       /* we require that devices are already present before any boot options
+        * are added */
+       assert(dev);
+
+       talloc_steal(dev, opt);
+
+       if (client->ops.boot_option_add)
+               client->ops.boot_option_add(dev, opt, client->ops.cb_arg);
+}
+
+static void device_remove(struct discover_client *client, const char *id)
 {
        struct device *device = NULL;
        int i;
@@ -107,24 +97,36 @@ static void remove_device(struct discover_client *client, const char *id)
        if (!device)
                return;
 
-       client->ops.remove_device(device, client->ops.cb_arg);
-
-       talloc_free(device);
-
        /* remove the device from the client's device array */
        client->n_devices--;
        memmove(&client->devices[i], &client->devices[i+1],
-                       client->n_devices - i);
+                       (client->n_devices - i) * sizeof(client->devices[0]));
        client->devices = talloc_realloc(client, client->devices,
                        struct device *, client->n_devices);
 
+       /* notify the UI */
+       client->ops.device_remove(device, client->ops.cb_arg);
+
+       talloc_free(device);
+}
+
+static void update_status(struct discover_client *client,
+               struct boot_status *status)
+{
+       if (client->ops.update_status)
+               client->ops.update_status(status, client->ops.cb_arg);
+       talloc_free(status);
 }
 
-int discover_client_process(struct discover_client *client)
+static int discover_client_process(void *arg)
 {
+       struct discover_client *client = arg;
        struct pb_protocol_message *message;
+       struct boot_status *status;
+       struct boot_option *opt;
        struct device *dev;
        char *dev_id;
+       int rc;
 
        message = pb_protocol_read_message(client, client->fd);
 
@@ -132,22 +134,46 @@ int discover_client_process(struct discover_client *client)
                return -1;
 
        switch (message->action) {
-       case PB_PROTOCOL_ACTION_ADD:
-               dev = pb_protocol_deserialise_device(client, message);
-               if (!dev) {
+       case PB_PROTOCOL_ACTION_DEVICE_ADD:
+               dev = talloc_zero(client, struct device);
+               list_init(&dev->boot_options);
+
+               rc = pb_protocol_deserialise_device(dev, message);
+               if (rc) {
                        pb_log("%s: no device?\n", __func__);
                        return 0;
                }
 
-               add_device(client, dev);
+               device_add(client, dev);
                break;
-       case PB_PROTOCOL_ACTION_REMOVE:
+       case PB_PROTOCOL_ACTION_BOOT_OPTION_ADD:
+               opt = talloc_zero(client, struct boot_option);
+
+               rc = pb_protocol_deserialise_boot_option(opt, message);
+               if (rc) {
+                       pb_log("%s: no boot_option?\n", __func__);
+                       return 0;
+               }
+
+               boot_option_add(client, opt);
+               break;
+       case PB_PROTOCOL_ACTION_DEVICE_REMOVE:
                dev_id = pb_protocol_deserialise_string(client, message);
                if (!dev_id) {
                        pb_log("%s: no device id?\n", __func__);
                        return 0;
                }
-               remove_device(client, dev_id);
+               device_remove(client, dev_id);
+               break;
+       case PB_PROTOCOL_ACTION_STATUS:
+               status = talloc_zero(client, struct boot_status);
+
+               rc = pb_protocol_deserialise_boot_status(status, message);
+               if (rc) {
+                       pb_log("%s: invalid status message?\n", __func__);
+                       return 0;
+               }
+               update_status(client, status);
                break;
        default:
                pb_log("%s: unknown action %d\n", __func__, message->action);
@@ -156,3 +182,112 @@ int discover_client_process(struct discover_client *client)
 
        return 0;
 }
+
+struct discover_client* discover_client_init(struct waitset *waitset,
+       const struct discover_client_ops *ops, void *cb_arg)
+{
+       struct discover_client *client;
+       struct sockaddr_un addr;
+
+       client = talloc(NULL, struct discover_client);
+       if (!client)
+               return NULL;
+
+       memcpy(&client->ops, ops, sizeof(client->ops));
+       client->ops.cb_arg = cb_arg;
+
+       client->fd = socket(AF_UNIX, SOCK_STREAM, 0);
+       if (client->fd < 0) {
+               pb_log("%s: socket: %s\n", __func__, strerror(errno));
+               goto out_err;
+       }
+
+       talloc_set_destructor(client, discover_client_destructor);
+
+       client->n_devices = 0;
+       client->devices = NULL;
+
+       addr.sun_family = AF_UNIX;
+       strcpy(addr.sun_path, PB_SOCKET_PATH);
+
+       if (connect(client->fd, (struct sockaddr *)&addr, sizeof(addr))) {
+               pb_log("%s: connect: %s\n", __func__, strerror(errno));
+               goto out_err;
+       }
+
+       waiter_register_io(waitset, client->fd, WAIT_IN,
+                       discover_client_process, client);
+
+       return client;
+
+out_err:
+       talloc_free(client);
+       return NULL;
+}
+
+/* accessors for discovered devices */
+int discover_client_device_count(struct discover_client *client)
+{
+       return client->n_devices;
+}
+
+struct device *discover_client_get_device(struct discover_client *client,
+               int index)
+{
+       if (index < 0 || index >= client->n_devices)
+               return NULL;
+
+       return client->devices[index];
+}
+
+static void create_boot_command(struct boot_command *command,
+               const struct device *device __attribute__((unused)),
+               const struct boot_option *boot_option,
+               const struct pb_boot_data *data)
+{
+
+       command->option_id = boot_option->id;
+       command->boot_image_file = data->image;
+       command->initrd_file = data->initrd;
+       command->boot_args = data->args;
+}
+
+int discover_client_boot(struct discover_client *client,
+               const struct device *device,
+               const struct boot_option *boot_option,
+               const struct pb_boot_data *data)
+{
+       struct pb_protocol_message *message;
+       struct boot_command boot_command;
+       int len, rc;
+
+       create_boot_command(&boot_command, device, boot_option, data);
+
+       len = pb_protocol_boot_len(&boot_command);
+
+       message = pb_protocol_create_message(client,
+                       PB_PROTOCOL_ACTION_BOOT, len);
+
+       if (!message)
+               return -1;
+
+       pb_protocol_serialise_boot_command(&boot_command,
+                       message->payload, len);
+
+       rc = pb_protocol_write_message(client->fd, message);
+
+       return rc;
+}
+
+int discover_client_cancel_default(struct discover_client *client)
+{
+       struct pb_protocol_message *message;
+
+       message = pb_protocol_create_message(client,
+                       PB_PROTOCOL_ACTION_CANCEL_DEFAULT, 0);
+
+       if (!message)
+               return -1;
+
+       return pb_protocol_write_message(client->fd, message);
+}