Implement restored API

1 files changed, 408 insertions, 0 deletions

diff --git a/src/restore.c b/src/restore.c
new file mode 100644
index 0000000..8acefef
--- /dev/null
+++ b/src/restore.c
@@ -0,0 +1,408 @@
+/*
+ * restore.c
+ * com.apple.mobile.restored service implementation.
+ *
+ * Copyright (c) 2010 Joshua Hill. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <glib.h>
+#include <plist/plist.h>
+
+#include "property_list_service.h"
+#include "restore.h"
+#include "idevice.h"
+#include "debug.h"
+
+#define RESULT_SUCCESS 0
+#define RESULT_FAILURE 1
+
+/**
+ * Internally used function for checking the result from restore's answer
+ * plist to a previously sent request.
+ *
+ * @param dict The plist to evaluate.
+ * @param query_match Name of the request to match.
+ *
+ * @return RESULT_SUCCESS when the result is 'Success',
+ *         RESULT_FAILURE when the result is 'Failure',
+ *         or a negative value if an error occured during evaluation.
+ */
+static int restored_check_result(plist_t dict)
+{
+        int ret = -1;
+        plist_t result_node = plist_dict_get_item(dict, "Result");
+        if (!result_node) {
+                return ret;
+        }
+
+        plist_type result_type = plist_get_node_type(result_node);
+
+        if (result_type == PLIST_STRING) {
+
+                char *result_value = NULL;
+
+                plist_get_string_val(result_node, &result_value);
+
+                if (result_value) {
+                        if (!strcmp(result_value, "Success")) {
+                                ret = RESULT_SUCCESS;
+                        } else if (!strcmp(result_value, "Failure")) {
+                                ret = RESULT_FAILURE;
+                        } else {
+                                debug_info("ERROR: unknown result value '%s'", result_value);
+                        }
+                }
+                if (result_value)
+                        free(result_value);
+        }
+        return ret;
+}
+
+/**
+ * Adds a label key with the passed value to a plist dict node.
+ *
+ * @param plist The plist to add the key to
+ * @param label The value for the label key
+ *
+ */
+static void plist_dict_add_label(plist_t plist, const char *label)
+{
+        if (plist && label) {
+                if (plist_get_node_type(plist) == PLIST_DICT)
+                        plist_dict_insert_item(plist, "Label", plist_new_string(label));
+        }
+}
+
+/**
+ * Closes the restored client session if one is running and frees up the
+ * restored_client struct.
+ *
+ * @param client The restore client
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client is NULL
+ */
+restored_error_t restored_client_free(restored_client_t client)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+        restored_error_t ret = RESTORE_E_UNKNOWN_ERROR;
+
+        if (client->parent) {
+                restored_goodbye(client);
+
+                if (property_list_service_client_free(client->parent) == PROPERTY_LIST_SERVICE_E_SUCCESS) {
+                        ret = RESTORE_E_SUCCESS;
+                }
+        }
+
+        if (client->uuid) {
+                free(client->uuid);
+        }
+        if (client->label) {
+                free(client->label);
+        }
+
+        free(client);
+        return ret;
+}
+
+/**
+ * Sets the label to send for requests to restored.
+ *
+ * @param client The restore client
+ * @param label The label to set or NULL to disable sending a label
+ *
+ */
+void restored_client_set_label(restored_client_t client, const char *label)
+{
+        if (client) {
+                if (client->label)
+                        free(client->label);
+
+                client->label = (label != NULL) ? strdup(label): NULL;
+        }
+}
+
+/**
+ * Receives a plist from restored.
+ *
+ * @param client The restored client
+ * @param plist The plist to store the received data
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client or
+ *  plist is NULL
+ */
+restored_error_t restored_receive(restored_client_t client, plist_t *plist)
+{
+        if (!client || !plist || (plist && *plist))
+                return RESTORE_E_INVALID_ARG;
+        restored_error_t ret = RESTORE_E_SUCCESS;
+        property_list_service_error_t err;
+
+        err = property_list_service_receive_plist(client->parent, plist);
+        if (err != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+                ret = RESTORE_E_UNKNOWN_ERROR;
+        }
+
+        if (!*plist)
+                ret = RESTORE_E_PLIST_ERROR;
+
+        return ret;
+}
+
+/**
+ * Sends a plist to restored.
+ *
+ * @note This function is low-level and should only be used if you need to send
+ *        a new type of message.
+ *
+ * @param client The restored client
+ * @param plist The plist to send
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client or
+ *  plist is NULL
+ */
+restored_error_t restored_send(restored_client_t client, plist_t plist)
+{
+        if (!client || !plist)
+                return RESTORE_E_INVALID_ARG;
+
+        restored_error_t ret = RESTORE_E_SUCCESS;
+        idevice_error_t err;
+
+        err = property_list_service_send_xml_plist(client->parent, plist);
+        if (err != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+                ret = RESTORE_E_UNKNOWN_ERROR;
+        }
+        return ret;
+}
+
+/**
+ * Query the type of the service daemon. Depending on whether the device is
+ * queried in normal mode or restore mode, different types will be returned.
+ *
+ * @param client The restored client
+ * @param type The type returned by the service daemon. Pass NULL to ignore.
+ * @param version The restore protocol version. Pass NULL to ignore.
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client is NULL
+ */
+restored_error_t restored_query_type(restored_client_t client, char **type, uint64_t *version)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+
+        restored_error_t ret = RESTORE_E_UNKNOWN_ERROR;
+
+        plist_t dict = plist_new_dict();
+        plist_dict_add_label(dict, client->label);
+        plist_dict_insert_item(dict,"Request", plist_new_string("QueryType"));
+
+        debug_info("called");
+        ret = restored_send(client, dict);
+
+        plist_free(dict);
+        dict = NULL;
+
+        ret = restored_receive(client, &dict);
+        
+        if (RESTORE_E_SUCCESS != ret)
+                return ret;
+
+        ret = RESTORE_E_UNKNOWN_ERROR;
+        if (restored_check_result(dict) == RESULT_SUCCESS) {
+                /* return the type if requested */
+                if (type != NULL) {
+                        plist_t type_node = plist_dict_get_item(dict, "Type");
+                        plist_get_string_val(type_node, type);
+                }
+                debug_info("success with type %s", *type);
+                ret = RESTORE_E_SUCCESS;
+
+                /* fetch the restore protocol version */
+                plist_t version_node = plist_dict_get_item(dict, "RestoreProtocolVersion");
+                if (version_node && version) {
+                        plist_get_uint_val(version_node, version);
+                        debug_info("restored protocol version %llu", *version);
+                        ret = RESTORE_E_SUCCESS;
+                } else
+                        ret = RESTORE_E_UNKNOWN_ERROR;
+
+        }
+        plist_free(dict);
+        dict = NULL;
+
+        return ret;
+}
+
+/**
+ * Creates a new restored client for the device.
+ *
+ * @param device The device to create a restored client for
+ * @param client The pointer to the location of the new restored_client
+ * @param label The label to use for communication. Usually the program name.
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client is NULL
+ */
+restored_error_t restored_client_new(idevice_t device, restored_client_t *client, const char *label)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+
+        restored_error_t ret = RESTORE_E_SUCCESS;
+
+        property_list_service_client_t plistclient = NULL;
+        if (property_list_service_client_new(device, 0xf27e, &plistclient) != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+                debug_info("could not connect to restored (device %s)", device->uuid);
+                return RESTORE_E_MUX_ERROR;
+        }
+
+        restored_client_t client_loc = (restored_client_t) malloc(sizeof(struct restored_client_private));
+        client_loc->parent = plistclient;
+        client_loc->uuid = NULL;
+        client_loc->label = NULL;
+        if (label != NULL)
+                client_loc->label = strdup(label);
+
+        ret = idevice_get_uuid(device, &client_loc->uuid);
+        if (RESTORE_E_SUCCESS != ret) {
+                debug_info("failed to get device uuid.");
+        }
+        debug_info("device uuid: %s", client_loc->uuid);
+
+        if (RESTORE_E_SUCCESS == ret) {
+                *client = client_loc;
+        } else {
+                restored_client_free(client_loc);
+        }
+
+        return ret;
+}
+
+/**
+ * Sends the Goodbye request to restored signaling the end of communication.
+ *
+ * @param client The restore client
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG when client is NULL,
+ *  RESTORE_E_PLIST_ERROR if the device did not acknowledge the request
+ */
+restored_error_t restored_goodbye(restored_client_t client)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+
+        restored_error_t ret = RESTORE_E_UNKNOWN_ERROR;
+
+        plist_t dict = plist_new_dict();
+        plist_dict_add_label(dict, client->label);
+        plist_dict_insert_item(dict,"Request", plist_new_string("Goodbye"));
+
+        debug_info("called");
+
+        ret = restored_send(client, dict);
+        plist_free(dict);
+        dict = NULL;
+
+        ret = restored_receive(client, &dict);
+        if (!dict) {
+                debug_info("did not get goodbye response back");
+                return RESTORE_E_PLIST_ERROR;
+        }
+
+        if (restored_check_result(dict) == RESULT_SUCCESS) {
+                debug_info("success");
+                ret = RESTORE_E_SUCCESS;
+        }
+        plist_free(dict);
+        dict = NULL;
+        return ret;
+}
+
+/**
+ * Requests to start a restore and retrieve it's port on success.
+ *
+ * @param client The restored client
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG if a parameter
+ *  is NULL, RESTORE_E_START_RESTORE_FAILED if the request fails
+ */
+restored_error_t restored_start_restore(restored_client_t client)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+
+        plist_t dict = NULL;
+        restored_error_t ret = RESTORE_E_UNKNOWN_ERROR;
+
+        dict = plist_new_dict();
+        plist_dict_add_label(dict, client->label);
+        plist_dict_insert_item(dict,"Request", plist_new_string("StartRestore"));
+        plist_dict_insert_item(dict,"RestoreProtocolVersion", plist_new_uint(2));
+
+        /* send to device */
+        ret = restored_send(client, dict);
+        plist_free(dict);
+        dict = NULL;
+
+        return ret;
+}
+
+/**
+ * Requests device to reboot.
+ *
+ * @param client The restored client
+ *
+ * @return RESTORE_E_SUCCESS on success, NP_E_INVALID_ARG if a parameter
+ *  is NULL
+ */
+restored_error_t restored_reboot(restored_client_t client)
+{
+        if (!client)
+                return RESTORE_E_INVALID_ARG;
+
+        plist_t dict = NULL;
+        restored_error_t ret = RESTORE_E_UNKNOWN_ERROR;
+
+        dict = plist_new_dict();
+        plist_dict_add_label(dict, client->label);
+        plist_dict_insert_item(dict,"Request", plist_new_string("Reboot"));
+
+        /* send to device */
+        ret = restored_send(client, dict);
+        plist_free(dict);
+        dict = NULL;
+
+        if (RESTORE_E_SUCCESS != ret)
+                return ret;
+
+        ret = restored_receive(client, &dict);
+        if (RESTORE_E_SUCCESS != ret)
+                return ret;
+
+        if (!dict)
+                return RESTORE_E_PLIST_ERROR;
+
+        plist_free(dict);
+        dict = NULL;
+        return ret;
+}
+