Added a new asr.c file to stick all stuff related to filesystem and abstract the restore process to allow for easier porting

1 files changed, 275 insertions, 0 deletions

diff --git a/src/asr.c b/src/asr.c
new file mode 100644
index 0000000..658f03f
--- /dev/null
+++ b/src/asr.c
@@ -0,0 +1,275 @@
+/*
+ * dfu.h
+ * Functions for handling idevices in normal mode
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libimobiledevice/libimobiledevice.h>
+
+#include "asr.h"
+#include "idevicerestore.h"
+
+#define ASR_PORT 12345
+#define ASR_BUFFER_SIZE 65536
+
+int asr_open_with_timeout(idevice_t device, idevice_connection_t* asr) {
+	int i = 0;
+	int attempts = 10;
+	idevice_connection_t connection = NULL;
+	idevice_error_t device_error = IDEVICE_E_SUCCESS;
+
+	*asr = NULL;
+
+	if (device == NULL) {
+		return -1;
+	}
+
+	debug("Connecting to ASR\n");
+	for (i = 1; i <= attempts; i++) {
+		device_error = idevice_connect(device, ASR_PORT, &connection);
+		if (device_error == IDEVICE_E_SUCCESS) {
+			break;
+		}
+
+		if (i >= attempts) {
+			error("ERROR: Unable to connect to ASR client\n");
+			return -1;
+		}
+
+		sleep(2);
+		debug("Retrying connection...\n");
+	}
+
+	*asr = connection;
+	return 0;
+}
+
+int asr_receive(idevice_connection_t asr, plist_t* data) {
+	uint32_t size = 0;
+	char* buffer = NULL;
+	plist_t request = NULL;
+	idevice_error_t device_error = IDEVICE_E_SUCCESS;
+
+	*data = NULL;
+
+	buffer = (char*) malloc(ASR_BUFFER_SIZE);
+	if (buffer == NULL) {
+		error("ERROR: Unable to allocate memory for ASR receive buffer\n");
+		return -1;
+	}
+	memset(buffer, '\0', ASR_BUFFER_SIZE);
+
+	device_error = idevice_connection_receive(asr, buffer, ASR_BUFFER_SIZE, &size);
+	if (device_error != IDEVICE_E_SUCCESS) {
+		error("ERROR: Unable to receive data from ASR\n");
+		free(buffer);
+		return -1;
+	}
+	plist_from_xml(buffer, size, &request);
+
+	*data = request;
+
+	debug("Received %d bytes:\n%s\n", size, buffer);
+	free(buffer);
+	return 0;
+}
+
+int asr_send(idevice_connection_t asr, plist_t* data) {
+	uint32_t size = 0;
+	char* buffer = NULL;
+
+	plist_to_xml(data, &buffer, &size);
+	if (asr_send_buffer(asr, buffer, size) < 0) {
+		error("ERROR: Unable to send plist to ASR\n");
+		free(buffer);
+		return -1;
+	}
+
+	free(buffer);
+	return 0;
+}
+
+int asr_send_buffer(idevice_connection_t asr, const char* data, uint32_t size) {
+	uint32_t bytes = 0;
+	idevice_error_t device_error = IDEVICE_E_SUCCESS;
+
+	device_error = idevice_connection_send(asr, data, size, &bytes);
+	if (device_error != IDEVICE_E_SUCCESS || bytes != size) {
+		error("ERROR: Unable to send data to ASR\n");
+		return -1;
+	}
+
+	debug("Sent %d bytes:\n%s", bytes, data);
+	return 0;
+}
+
+void asr_close(idevice_connection_t asr) {
+	if (asr != NULL) {
+		idevice_disconnect(asr);
+		asr = NULL;
+	}
+}
+
+int asr_perform_validation(idevice_connection_t asr, const char* filesystem) {
+	FILE* file = NULL;
+	uint64_t length = 0;
+	char* command = NULL;
+	plist_t node = NULL;
+	plist_t packet = NULL;
+	plist_t packet_info = NULL;
+	plist_t payload_info = NULL;
+
+	file = fopen(filesystem, "rb");
+	if (file == NULL) {
+		return -1;
+	}
+
+	fseek(file, 0, SEEK_END);
+	length = ftell(file);
+	fseek(file, 0, SEEK_SET);
+
+	payload_info = plist_new_dict();
+	plist_dict_insert_item(payload_info, "Port", plist_new_uint(1));
+	plist_dict_insert_item(payload_info, "Size", plist_new_uint(length));
+
+	packet_info = plist_new_dict();
+	plist_dict_insert_item(packet_info, "FEC Slice Stride", plist_new_uint(40));
+	plist_dict_insert_item(packet_info, "Packet Payload Size", plist_new_uint(1450));
+	plist_dict_insert_item(packet_info, "Packets Per FEC", plist_new_uint(25));
+	plist_dict_insert_item(packet_info, "Payload", payload_info);
+	plist_dict_insert_item(packet_info, "Stream ID", plist_new_uint(1));
+	plist_dict_insert_item(packet_info, "Version", plist_new_uint(1));
+
+	if (asr_send(asr, packet_info)) {
+		error("ERROR: Unable to sent packet information to ASR\n");
+		plist_free(packet_info);
+		return -1;
+	}
+	plist_free(packet_info);
+
+	char* oob_data = NULL;
+	uint64_t oob_offset = 0;
+	uint64_t oob_length = 0;
+	plist_t oob_length_node = NULL;
+	plist_t oob_offset_node = NULL;
+	do {
+		if (asr_receive(asr, &packet) < 0) {
+			error("ERROR: Unable to receive validation packet\n");
+			return -1;
+		}
+
+		node = plist_dict_get_item(packet, "Command");
+		if (!node || plist_get_node_type(node) != PLIST_STRING) {
+			error("ERROR: Unable to find command node in validation request\n");
+			return -1;
+		}
+		plist_get_string_val(node, &command);
+
+		if (!strcmp(command, "OOBData")) {
+			oob_length_node = plist_dict_get_item(packet, "OOB Length");
+			if (!oob_length_node || PLIST_UINT != plist_get_node_type(oob_length_node)) {
+				error("ERROR: Unable to find OOB data length\n");
+				return -1;
+			}
+			plist_get_uint_val(oob_length_node, &oob_length);
+
+			oob_offset_node = plist_dict_get_item(packet, "OOB Offset");
+			if (!oob_offset_node || PLIST_UINT != plist_get_node_type(oob_offset_node)) {
+				error("ERROR: Unable to find OOB data offset\n");
+				return -1;
+			}
+			plist_get_uint_val(oob_offset_node, &oob_offset);
+
+			oob_data = (char*) malloc(oob_length);
+			if (oob_data == NULL) {
+				error("ERROR: Out of memory\n");
+				plist_free(packet);
+				return -1;
+			}
+
+			fseek(file, oob_offset, SEEK_SET);
+			if (fread(oob_data, 1, oob_length, file) != oob_length) {
+				error("ERROR: Unable to read OOB data from filesystem offset\n");
+				plist_free(packet);
+				free(oob_data);
+				return -1;
+			}
+
+			if (asr_send_buffer(asr, oob_data, oob_length) < 0) {
+				error("ERROR: Unable to send OOB data to ASR\n");
+				plist_free(packet);
+				free(oob_data);
+				return -1;
+			}
+
+			plist_free(packet);
+			free(oob_data);
+
+		}
+
+	} while (strcmp(packet, "Payload"));
+}
+
+int asr_send_payload(idevice_connection_t asr, const char* filesystem) {
+	int i = 0;
+	char data[1450];
+	FILE* file = NULL;
+	uint32_t bytes = 0;
+	uint32_t count = 0;
+	uint32_t length = 0;
+	double progress = 0;
+
+	file = fopen(filesystem, "rb");
+	if (file == NULL) {
+		return -1;
+	}
+
+	fseek(file, 0, SEEK_END);
+	length = ftell(file);
+	fseek(file, 0, SEEK_SET);
+
+	for(i = length; i > 0; i -= 1450) {
+		int size = 1450;
+		if (i < 1450) {
+			size = i;
+		}
+
+		if (fread(data, 1, size, file) != (unsigned int) size) {
+			error("Error reading filesystem\n");
+			fclose(file);
+			return -1;
+		}
+
+		if (asr_send_buffer(asr, data, size) < 0) {
+			error("ERROR: Unable to send filesystem payload\n");
+			fclose(file);
+			return -1;
+		}
+
+		bytes += size;
+		progress = ((double) bytes/ (double) length) * 100.0;
+		print_progress_bar("Extracting", progress);
+
+	}
+
+	fclose(file);
+	return 0;
+}