diagnostics_relay: Add basic new service implementation

1 files changed, 340 insertions, 0 deletions

diff --git a/src/diagnostics_relay.c b/src/diagnostics_relay.c
new file mode 100644
index 0000000..4cde230
--- /dev/null
+++ b/src/diagnostics_relay.c
@@ -0,0 +1,340 @@
+ /* 
+ * diagnostics_relay.c
+ * com.apple.mobile.diagnostics_relay service implementation.
+ * 
+ * Copyright (c) 2012 Martin Szulecki, 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 <string.h>
+#include <stdlib.h>
+#include "diagnostics_relay.h"
+#include "property_list_service.h"
+#include "debug.h"
+
+#define RESULT_SUCCESS 0
+#define RESULT_FAILURE 1
+
+/**
+ * Internally used function for checking the result from a service response
+ * plist to a previously sent request.
+ *
+ * @param dict The plist to evaluate.
+ * @param query_match Name of the request to match or NULL if no match is
+ *        required.
+ *
+ * @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 diagnostics_relay_check_result(plist_t dict, const char *query_match)
+{
+	int ret = -1;
+
+	plist_t query_node = plist_dict_get_item(dict, "Request");
+	if (!query_node) {
+		return ret;
+	}
+	if (plist_get_node_type(query_node) != PLIST_STRING) {
+		return ret;
+	} else {
+		char *query_value = NULL;
+		plist_get_string_val(query_node, &query_value);
+		if (!query_value) {
+			return ret;
+		}
+		if (query_match && (strcmp(query_value, query_match) != 0)) {
+			free(query_value);
+			return ret;
+		}
+		free(query_value);
+	}
+
+	plist_t result_node = plist_dict_get_item(dict, "Status");
+	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;
+}
+
+/**
+ * Connects to the diagnostics_relay service on the specified device.
+ *
+ * @param device The device to connect to.
+ * @param port Destination port (usually given by lockdownd_start_service).
+ * @param client Reference that will point to a newly allocated
+ *     diagnostics_relay_client_t upon successful return.
+ *
+ * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
+ *     DIAGNOSTICS_RELAY_E_INVALID_ARG when one of the parameters is invalid,
+ *     or DIAGNOSTICS_RELAY_E_MUX_ERROR when the connection failed.
+ */
+diagnostics_relay_error_t diagnostics_relay_client_new(idevice_t device, uint16_t port, diagnostics_relay_client_t *client)
+{
+	if (!device || port == 0 || !client || *client) {
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+	}
+
+	property_list_service_client_t plistclient = NULL;
+	if (property_list_service_client_new(device, port, &plistclient) != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+		return DIAGNOSTICS_RELAY_E_MUX_ERROR;
+	}
+
+	/* create client object */
+	diagnostics_relay_client_t client_loc = (diagnostics_relay_client_t) malloc(sizeof(struct diagnostics_relay_client_private));
+	client_loc->parent = plistclient;
+
+	/* all done, return success */
+	*client = client_loc;
+	return DIAGNOSTICS_RELAY_E_SUCCESS;
+}
+
+/**
+ * Disconnects a diagnostics_relay client from the device and frees up the 
+ * diagnostics_relay client data.
+ *
+ * @param client The diagnostics_relay client to disconnect and free.
+ *
+ * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
+ *     DIAGNOSTICS_RELAY_E_INVALID_ARG when one of client or client->parent
+ *     is invalid, or DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR when the was an
+ *     error freeing the parent property_list_service client.
+ */
+diagnostics_relay_error_t diagnostics_relay_client_free(diagnostics_relay_client_t client)
+{
+	if (!client)
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+
+	if (property_list_service_client_free(client->parent) != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+		return DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
+	}
+	return DIAGNOSTICS_RELAY_E_SUCCESS;
+}
+
+/**
+ * Receives a plist from the service.
+ *
+ * @param client The diagnostics_relay client
+ * @param plist The plist to store the received data
+ *
+ * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
+ *  DIAGNOSTICS_RELAY_E_INVALID_ARG when client or plist is NULL
+ */
+static diagnostics_relay_error_t diagnostics_relay_receive(diagnostics_relay_client_t client, plist_t *plist)
+{
+	if (!client || !plist || (plist && *plist))
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+
+	diagnostics_relay_error_t ret = DIAGNOSTICS_RELAY_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 = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
+	}
+
+	if (!*plist)
+		ret = DIAGNOSTICS_RELAY_E_PLIST_ERROR;
+
+	return ret;
+}
+
+/**
+ * Sends a plist to the service.
+ *
+ * @note This function is low-level and should only be used if you need to send
+ *        a new type of message.
+ *
+ * @param client The diagnostics_relay client
+ * @param plist The plist to send
+ *
+ * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
+ *  DIAGNOSTICS_RELAY_E_INVALID_ARG when client or plist is NULL
+ */
+static diagnostics_relay_error_t diagnostics_relay_send(diagnostics_relay_client_t client, plist_t plist)
+{
+	if (!client || !plist)
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+
+	diagnostics_relay_error_t ret = DIAGNOSTICS_RELAY_E_SUCCESS;
+	idevice_error_t err;
+
+	err = property_list_service_send_xml_plist(client->parent, plist);
+	if (err != PROPERTY_LIST_SERVICE_E_SUCCESS) {
+		ret = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
+	}
+	return ret;
+}
+
+/**
+ * Sends the Goodbye request signaling the end of communication.
+ *
+ * @param client The diagnostics_relay client
+ *
+ * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
+ *  DIAGNOSTICS_RELAY_E_INVALID_ARG when client is NULL,
+ *  DIAGNOSTICS_RELAY_E_PLIST_ERROR if the device did not acknowledge the
+ *  request
+ */
+diagnostics_relay_error_t diagnostics_relay_goodbye(diagnostics_relay_client_t client)
+{
+	if (!client)
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+
+	diagnostics_relay_error_t ret = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
+
+	plist_t dict = plist_new_dict();
+	plist_dict_insert_item(dict, "Request", plist_new_string("Goodbye"));
+
+	ret = diagnostics_relay_send(client, dict);
+	plist_free(dict);
+	dict = NULL;
+
+	ret = diagnostics_relay_receive(client, &dict);
+	if (!dict) {
+		debug_info("did not get goodbye response back");
+		return DIAGNOSTICS_RELAY_E_PLIST_ERROR;
+	}
+
+	if (diagnostics_relay_check_result(dict, "Goodbye") == RESULT_SUCCESS) {
+		debug_info("success");
+		ret = DIAGNOSTICS_RELAY_E_SUCCESS;
+	}
+	plist_free(dict);
+	dict = NULL;
+	return ret;
+}
+
+diagnostics_relay_error_t diagnostics_relay_request_diagnostics(diagnostics_relay_client_t client, plist_t* diagnostics)
+{
+	if (!client || diagnostics == NULL)
+		return DIAGNOSTICS_RELAY_E_INVALID_ARG;
+
+	diagnostics_relay_error_t ret = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
+
+	plist_t dict = plist_new_dict();
+/*
+	Provides a diagnostics interface. Some stuff is only available on iOS 5+
+
+	Protocol:
+
+		Request:
+			<key>Request</key><string>IORegistry</string>
+			[<key>CurrentPlane</key><string>IODeviceTree</string>]
+		Response:
+			[Diagnostics]
+				IORegistry
+					...
+			Status
+				"Success" | "UnknownRequest"
+			[ErrorCode]
+				%d
+
+	Unknown Strings:
+
+	? IO80211Interface
+	? InternalBuild
+	? DisplayFail
+	? DisplayPass
+	? WaitForDisconnect
+
+	Known/Tested Requests:
+
+	// wifi: Show wifi status
+	plist_dict_insert_item(dict,"Request", plist_new_string("WiFi"));
+
+	// gas_gauge: Show battery load cycles and more
+	plist_dict_insert_item(dict,"Request", plist_new_string("GasGauge"));
+	plist_dict_insert_item(dict,"Request", plist_new_string("NAND"));
+	plist_dict_insert_item(dict,"Request", plist_new_string("Sleep"));
+	plist_dict_insert_item(dict,"Request", plist_new_string("Shutdown"));
+	plist_dict_insert_item(dict,"Request", plist_new_string("Restart"));
+
+	// obliberate: Wipe data on device
+	// @note: Currently yields: "iPhone mobile_diagnostics_relay[253] <Error>: do_obliterate: obliteration denied: not running internal build."
+	plist_dict_insert_item(dict,"Request", plist_new_string("Obliterate"));
+	? DataPartitionOnly
+	? ObliterationType
+	? ObliterateDataPartition
+	? ObliterationTypeWipeAndBrick
+	? DisplayProgressBar
+	? SkipDataObliteration
+	? ObliterationMessage
+
+	// mobile_gestalt: read out managed keys
+	plist_t keys = plist_new_array();
+	plist_array_append_item(keys, plist_new_string("UserAssignedDeviceName"));
+	plist_array_append_item(keys, plist_new_string("BasebandSecurityInfo"));
+	plist_array_append_item(keys, plist_new_string("BasebandSerialNumber"));
+	plist_array_append_item(keys, plist_new_string("MyPhoneNumber"));
+	plist_array_append_item(keys, plist_new_string("SNUM"));
+	plist_dict_insert_item(dict,"MobileGestaltKeys", keys);
+	plist_dict_insert_item(dict,"Request", plist_new_string("MobileGestalt"));
+
+	// io registry: dump by plane or name and class
+	plist_dict_insert_item(dict,"CurrentPlane", plist_new_string("IODeviceTree"));
+	or
+	plist_dict_insert_item(dict,"EntryName", plist_new_string("baseband"));
+	plist_dict_insert_item(dict,"EntryClass", plist_new_string("IOPlatformDevice"));
+	plist_dict_insert_item(dict,"Request", plist_new_string("IORegistry"));
+*/
+	plist_dict_insert_item(dict,"Request", plist_new_string("IORegistry"));
+	plist_dict_insert_item(dict,"CurrentPlane", plist_new_string(""));
+	ret = diagnostics_relay_send(client, dict);
+	plist_free(dict);
+	dict = NULL;
+
+	ret = diagnostics_relay_receive(client, &dict);
+	if (!dict) {
+		debug_info("did not get response back");
+		return DIAGNOSTICS_RELAY_E_PLIST_ERROR;
+	}
+
+	if (diagnostics_relay_check_result(dict, "Diagnostics") == RESULT_SUCCESS) {
+		debug_info("success");
+		ret = DIAGNOSTICS_RELAY_E_SUCCESS;
+	}
+	if (ret != DIAGNOSTICS_RELAY_E_SUCCESS) {
+		plist_free(dict);
+		return ret;
+	}
+
+	plist_t value_node = plist_dict_get_item(dict, "Diagnostics");
+	if (value_node) {
+		debug_info("has a value");
+		*diagnostics = plist_copy(value_node);
+	}
+
+	plist_free(dict);
+	return ret;
+}