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|
/*
* AFC.c
* Contains functions for the built-in AFC client.
*
* Copyright (c) 2008 Zach C. 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 <unistd.h>
#include "AFC.h"
#include "iphone.h"
#include "debug.h"
// This is the maximum size an AFC data packet can be
static const int MAXIMUM_PACKET_SIZE = (2 << 15);
/** Locks an AFC client, done for thread safety stuff
*
* @param client The AFC client connection to lock
*/
static void afc_lock(afc_client_t client)
{
debug_info("Locked");
g_mutex_lock(client->mutex);
}
/** Unlocks an AFC client, done for thread safety stuff.
*
* @param client The AFC
*/
static void afc_unlock(afc_client_t client)
{
debug_info("Unlocked");
g_mutex_unlock(client->mutex);
}
/** Makes a connection to the AFC service on the phone.
*
* @param device The device to connect to.
* @param port The destination port.
* @param client Pointer that will be set to a newly allocated afc_client_t
* upon successful return.
*
* @return AFC_E_SUCCESS on success, AFC_E_INVALID_ARGUMENT when device or port
* is invalid, AFC_E_MUX_ERROR when the connection failed, or AFC_E_NO_MEM
* when there's a memory allocation problem.
*/
afc_error_t afc_client_new(iphone_device_t device, uint16_t port, afc_client_t * client)
{
/* makes sure thread environment is available */
if (!g_thread_supported())
g_thread_init(NULL);
if (!device || port==0)
return AFC_E_INVALID_ARGUMENT;
/* attempt connection */
iphone_connection_t connection = NULL;
if (iphone_device_connect(device, port, &connection) != IPHONE_E_SUCCESS) {
return AFC_E_MUX_ERROR;
}
afc_client_t client_loc = (afc_client_t) malloc(sizeof(struct afc_client_int));
client_loc->connection = connection;
/* allocate a packet */
client_loc->afc_packet = (AFCPacket *) malloc(sizeof(AFCPacket));
if (!client_loc->afc_packet) {
iphone_device_disconnect(client_loc->connection);
free(client_loc);
return AFC_E_NO_MEM;
}
client_loc->afc_packet->packet_num = 0;
client_loc->afc_packet->entire_length = 0;
client_loc->afc_packet->this_length = 0;
memcpy(client_loc->afc_packet->magic, AFC_MAGIC, AFC_MAGIC_LEN);
client_loc->file_handle = 0;
client_loc->lock = 0;
client_loc->mutex = g_mutex_new();
*client = client_loc;
return AFC_E_SUCCESS;
}
/** Disconnects an AFC client from the phone.
*
* @param client The client to disconnect.
*/
afc_error_t afc_client_free(afc_client_t client)
{
if (!client || !client->connection || !client->afc_packet)
return AFC_E_INVALID_ARGUMENT;
iphone_device_disconnect(client->connection);
free(client->afc_packet);
if (client->mutex) {
g_mutex_free(client->mutex);
}
free(client);
return AFC_E_SUCCESS;
}
/** Dispatches an AFC packet over a client.
*
* @param client The client to send data through.
* @param data The data to send.
* @param length The length to send.
* @param bytes_sent The number of bytes actually sent.
*
* @return AFC_E_SUCCESS on success, or an AFC_E_* error value on error.
*
* @warning set client->afc_packet->this_length and
* client->afc_packet->entire_length to 0 before calling this. The
* reason is that if you set them to different values, it indicates
* you want to send the data as two packets.
*/
static afc_error_t afc_dispatch_packet(afc_client_t client, const char *data, uint32_t length, uint32_t *bytes_sent)
{
uint32_t offset = 0;
uint32_t sent = 0;
if (!client || !client->connection || !client->afc_packet)
return AFC_E_INVALID_ARGUMENT;
*bytes_sent = 0;
if (!data || !length)
length = 0;
client->afc_packet->packet_num++;
if (!client->afc_packet->entire_length) {
client->afc_packet->entire_length = (length) ? sizeof(AFCPacket) + length : sizeof(AFCPacket);
client->afc_packet->this_length = client->afc_packet->entire_length;
}
if (!client->afc_packet->this_length) {
client->afc_packet->this_length = sizeof(AFCPacket);
}
// We want to send two segments; buffer+sizeof(AFCPacket) to
// this_length is the parameters
// And everything beyond that is the next packet. (for writing)
if (client->afc_packet->this_length != client->afc_packet->entire_length) {
offset = client->afc_packet->this_length - sizeof(AFCPacket);
debug_info("Offset: %i", offset);
if ((length) < (client->afc_packet->entire_length - client->afc_packet->this_length)) {
debug_info("Length did not resemble what it was supposed to based on packet");
debug_info("length minus offset: %i", length - offset);
debug_info("rest of packet: %i\n", client->afc_packet->entire_length - client->afc_packet->this_length);
return AFC_E_INTERNAL_ERROR;
}
/* send AFC packet header */
AFCPacket_to_LE(client->afc_packet);
sent = 0;
iphone_device_send(client->connection, (void*)client->afc_packet, sizeof(AFCPacket), &sent);
if (sent == 0) {
/* FIXME: should this be handled as success?! */
return AFC_E_SUCCESS;
}
*bytes_sent += sent;
/* send AFC packet data */
sent = 0;
iphone_device_send(client->connection, data, offset, &sent);
if (sent == 0) {
return AFC_E_SUCCESS;
}
*bytes_sent += sent;
debug_info("sent the first now go with the second");
debug_info("Length: %i", length - offset);
debug_info("Buffer: ");
debug_buffer(data + offset, length - offset);
sent = 0;
iphone_device_send(client->connection, data + offset, length - offset, &sent);
*bytes_sent = sent;
return AFC_E_SUCCESS;
} else {
debug_info("doin things the old way");
debug_info("packet length = %i", client->afc_packet->this_length);
debug_buffer((char*)client->afc_packet, sizeof(AFCPacket));
/* send AFC packet header */
AFCPacket_to_LE(client->afc_packet);
sent = 0;
iphone_device_send(client->connection, (void*)client->afc_packet, sizeof(AFCPacket), &sent);
if (sent == 0) {
return AFC_E_SUCCESS;
}
*bytes_sent += sent;
/* send AFC packet data (if there's data to send) */
if (length > 0) {
debug_info("packet data follows");
debug_buffer(data, length);
iphone_device_send(client->connection, data, length, &sent);
*bytes_sent += sent;
}
return AFC_E_SUCCESS;
}
return AFC_E_INTERNAL_ERROR;
}
/** Receives data through an AFC client and sets a variable to the received data.
*
* @param client The client to receive data on.
* @param dump_here The char* to point to the newly-received data.
* @param bytes_recv How much data was received.
*
* @return AFC_E_SUCCESS when data has been received, or an AFC_E_* error value
* when an error occured.
*/
static afc_error_t afc_receive_data(afc_client_t client, char **dump_here, uint32_t *bytes_recv)
{
AFCPacket header;
uint32_t entire_len = 0;
uint32_t this_len = 0;
uint32_t current_count = 0;
uint64_t param1 = -1;
*bytes_recv = 0;
/* first, read the AFC header */
iphone_device_recv(client->connection, (char*)&header, sizeof(AFCPacket), bytes_recv);
AFCPacket_from_LE(&header);
if (*bytes_recv == 0) {
debug_info("Just didn't get enough.");
*dump_here = NULL;
return AFC_E_MUX_ERROR;
} else if (*bytes_recv < sizeof(AFCPacket)) {
debug_info("Did not even get the AFCPacket header");
*dump_here = NULL;
return AFC_E_MUX_ERROR;
}
/* check if it's a valid AFC header */
if (strncmp(header.magic, AFC_MAGIC, AFC_MAGIC_LEN)) {
debug_info("Invalid AFC packet received (magic != " AFC_MAGIC ")!");
}
/* check if it has the correct packet number */
if (header.packet_num != client->afc_packet->packet_num) {
/* otherwise print a warning but do not abort */
debug_info("ERROR: Unexpected packet number (%lld != %lld) aborting.", header.packet_num, client->afc_packet->packet_num);
*dump_here = NULL;
return AFC_E_OP_HEADER_INVALID;
}
/* then, read the attached packet */
if (header.this_length < sizeof(AFCPacket)) {
debug_info("Invalid AFCPacket header received!");
*dump_here = NULL;
return AFC_E_OP_HEADER_INVALID;
} else if ((header.this_length == header.entire_length)
&& header.entire_length == sizeof(AFCPacket)) {
debug_info("Empty AFCPacket received!");
*dump_here = NULL;
*bytes_recv = 0;
if (header.operation == AFC_OP_DATA) {
return AFC_E_SUCCESS;
} else {
return AFC_E_IO_ERROR;
}
}
debug_info("received AFC packet, full len=%lld, this len=%lld, operation=0x%llx", header.entire_length, header.this_length, header.operation);
entire_len = (uint32_t)header.entire_length - sizeof(AFCPacket);
this_len = (uint32_t)header.this_length - sizeof(AFCPacket);
/* this is here as a check (perhaps a different upper limit is good?) */
if (entire_len > (uint32_t)MAXIMUM_PACKET_SIZE) {
fprintf(stderr, "%s: entire_len is larger than MAXIMUM_PACKET_SIZE, (%d > %d)!", __func__, entire_len, MAXIMUM_PACKET_SIZE);
}
*dump_here = (char*)malloc(entire_len);
if (this_len > 0) {
iphone_device_recv(client->connection, *dump_here, this_len, bytes_recv);
if (*bytes_recv <= 0) {
free(*dump_here);
*dump_here = NULL;
debug_info("Did not get packet contents!");
return AFC_E_NOT_ENOUGH_DATA;
} else if (*bytes_recv < this_len) {
free(*dump_here);
*dump_here = NULL;
debug_info("Could not receive this_len=%d bytes", this_len);
return AFC_E_NOT_ENOUGH_DATA;
}
}
current_count = this_len;
if (entire_len > this_len) {
while (current_count < entire_len) {
iphone_device_recv(client->connection, (*dump_here)+current_count, entire_len - current_count, bytes_recv);
if (*bytes_recv <= 0) {
debug_info("Error receiving data (recv returned %d)", *bytes_recv);
break;
}
current_count += *bytes_recv;
}
if (current_count < entire_len) {
debug_info("WARNING: could not receive full packet (read %s, size %d)", current_count, entire_len);
}
}
if (current_count >= sizeof(uint64_t)) {
param1 = *(uint64_t*)(*dump_here);
}
debug_info("packet data size = %i", current_count);
debug_info("packet data follows");
debug_buffer(*dump_here, current_count);
/* check operation types */
if (header.operation == AFC_OP_STATUS) {
/* status response */
debug_info("got a status response, code=%lld", param1);
if (param1 != AFC_E_SUCCESS) {
/* error status */
/* free buffer */
free(*dump_here);
*dump_here = NULL;
return (afc_error_t)param1;
}
} else if (header.operation == AFC_OP_DATA) {
/* data response */
debug_info("got a data response");
} else if (header.operation == AFC_OP_FILE_OPEN_RES) {
/* file handle response */
debug_info("got a file handle response, handle=%lld", param1);
} else if (header.operation == AFC_OP_FILE_TELL_RES) {
/* tell response */
debug_info("got a tell response, position=%lld", param1);
} else {
/* unknown operation code received */
free(*dump_here);
*dump_here = NULL;
*bytes_recv = 0;
debug_info("WARNING: Unknown operation code received 0x%llx param1=%lld", header.operation, param1);
fprintf(stderr, "%s: WARNING: Unknown operation code received 0x%llx param1=%lld", __func__, (long long)header.operation, (long long)param1);
return AFC_E_OP_NOT_SUPPORTED;
}
*bytes_recv = current_count;
return AFC_E_SUCCESS;
}
static uint32_t count_nullspaces(char *string, uint32_t number)
{
uint32_t i = 0, nulls = 0;
for (i = 0; i < number; i++) {
if (string[i] == '\0')
nulls++;
}
return nulls;
}
static char **make_strings_list(char *tokens, uint32_t true_length)
{
uint32_t nulls = 0, i = 0, j = 0;
char **list = NULL;
if (!tokens || !true_length)
return NULL;
nulls = count_nullspaces(tokens, true_length);
list = (char **) malloc(sizeof(char *) * (nulls + 1));
for (i = 0; i < nulls; i++) {
list[i] = strdup(tokens + j);
j += strlen(list[i]) + 1;
}
list[i] = NULL;
return list;
}
/** Gets a directory listing of the directory requested.
*
* @param client The client to get a directory listing from.
* @param dir The directory to list. (must be a fully-qualified path)
*
* @return A char ** list of files in that directory, terminated by an empty
* string for now or NULL if there was an error.
*/
afc_error_t afc_read_directory(afc_client_t client, const char *dir, char ***list)
{
uint32_t bytes = 0;
char *data = NULL, **list_loc = NULL;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !dir || !list || (list && *list))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send the command
client->afc_packet->operation = AFC_OP_READ_DIR;
client->afc_packet->entire_length = 0;
client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, dir, strlen(dir)+1, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive the data
ret = afc_receive_data(client, &data, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return ret;
}
// Parse the data
list_loc = make_strings_list(data, bytes);
if (data)
free(data);
afc_unlock(client);
*list = list_loc;
return ret;
}
/** Get device info for a client connection to phone. (free space on disk, etc.)
*
* @param client The client to get device info for.
*
* @return A char ** list of parameters as given by AFC or NULL if there was an
* error.
*/
afc_error_t afc_get_device_info(afc_client_t client, char ***infos)
{
uint32_t bytes = 0;
char *data = NULL, **list = NULL;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !infos)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send the command
client->afc_packet->operation = AFC_OP_GET_DEVINFO;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, NULL, 0, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive the data
ret = afc_receive_data(client, &data, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return ret;
}
// Parse the data
list = make_strings_list(data, bytes);
if (data)
free(data);
afc_unlock(client);
*infos = list;
return ret;
}
/** Get a specific key of the device info list for a client connection.
* Known key values are: Model, FSTotalBytes, FSFreeBytes and FSBlockSize.
* This is a helper function for afc_get_device_info().
*
* @param client The client to get device info for.
* @param key The key to get the value of.
* @param value The value for the key if successful or NULL otherwise.
*
* @return AFC_E_SUCCESS on success or an AFC_E_* error value.
*/
afc_error_t afc_get_device_info_key(afc_client_t client, const char *key, char **value)
{
afc_error_t ret = AFC_E_INTERNAL_ERROR;
char **kvps, **ptr;
*value = NULL;
if (key == NULL)
return AFC_E_INVALID_ARGUMENT;
ret = afc_get_device_info(client, &kvps);
if (ret != AFC_E_SUCCESS)
return ret;
for (ptr = kvps; *ptr; ptr++) {
if (!strcmp(*ptr, key)) {
*value = strdup(*(ptr+1));
break;
}
}
g_strfreev(kvps);
return ret;
}
/** Deletes a file or directory.
*
* @param client The client to use.
* @param path The path to delete. (must be a fully-qualified path)
*
* @return AFC_E_SUCCESS if everythong went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_remove_path(afc_client_t client, const char *path)
{
char *response = NULL;
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !path || !client->afc_packet || !client->connection)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
client->afc_packet->this_length = client->afc_packet->entire_length = 0;
client->afc_packet->operation = AFC_OP_REMOVE_PATH;
ret = afc_dispatch_packet(client, path, strlen(path)+1, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
/* special case; unknown error actually means directory not empty */
if (ret == AFC_E_UNKNOWN_ERROR)
ret = AFC_E_DIR_NOT_EMPTY;
afc_unlock(client);
return ret;
}
/** Renames a file or directory on the phone.
*
* @param client The client to have rename.
* @param from The name to rename from. (must be a fully-qualified path)
* @param to The new name. (must also be a fully-qualified path)
*
* @return AFC_E_SUCCESS if everythong went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_rename_path(afc_client_t client, const char *from, const char *to)
{
char *response = NULL;
char *send = (char *) malloc(sizeof(char) * (strlen(from) + strlen(to) + 1 + sizeof(uint32_t)));
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !from || !to || !client->afc_packet || !client->connection)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
memcpy(send, from, strlen(from) + 1);
memcpy(send + strlen(from) + 1, to, strlen(to) + 1);
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
client->afc_packet->operation = AFC_OP_RENAME_PATH;
ret = afc_dispatch_packet(client, send, strlen(to)+1 + strlen(from)+1, &bytes);
free(send);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
afc_unlock(client);
return ret;
}
/** Creates a directory on the phone.
*
* @param client The client to use to make a directory.
* @param dir The directory's path. (must be a fully-qualified path, I assume
* all other mkdir restrictions apply as well)
*
* @return AFC_E_SUCCESS if everythong went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_make_directory(afc_client_t client, const char *dir)
{
uint32_t bytes = 0;
char *response = NULL;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
client->afc_packet->operation = AFC_OP_MAKE_DIR;
client->afc_packet->this_length = client->afc_packet->entire_length = 0;
ret = afc_dispatch_packet(client, dir, strlen(dir)+1, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
afc_unlock(client);
return ret;
}
/** Gets information about a specific file.
*
* @param client The client to use to get the information of the file.
* @param path The fully-qualified path to the file.
* @param infolist Pointer to a buffer that will be filled with a NULL-terminated
* list of strings with the file information.
* Set to NULL before calling this function.
*
* @return AFC_E_SUCCESS on success or an AFC_E_* error value
* when something went wrong.
*/
afc_error_t afc_get_file_info(afc_client_t client, const char *path, char ***infolist)
{
char *received = NULL;
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !path || !infolist)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
client->afc_packet->operation = AFC_OP_GET_FILE_INFO;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, path, strlen(path)+1, &bytes);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive data
ret = afc_receive_data(client, &received, &bytes);
if (received) {
*infolist = make_strings_list(received, bytes);
free(received);
}
afc_unlock(client);
return ret;
}
/** Opens a file on the phone.
*
* @param client The client to use to open the file.
* @param filename The file to open. (must be a fully-qualified path)
* @param file_mode The mode to use to open the file. Can be AFC_FILE_READ or
* AFC_FILE_WRITE; the former lets you read and write,
* however, and the second one will *create* the file,
* destroying anything previously there.
* @param handle Pointer to a uint64_t that will hold the handle of the file
*
* @return AFC_E_SUCCESS on success or an AFC_E_* error on failure.
*/
iphone_error_t
afc_file_open(afc_client_t client, const char *filename,
afc_file_mode_t file_mode, uint64_t *handle)
{
uint64_t file_mode_loc = GUINT64_TO_LE(file_mode);
uint32_t bytes = 0;
char *data = (char *) malloc(sizeof(char) * (8 + strlen(filename) + 1));
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
// set handle to 0 so in case an error occurs, the handle is invalid
*handle = 0;
if (!client || !client->connection || !client->afc_packet)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
memcpy(data, &file_mode_loc, 8);
memcpy(data + 8, filename, strlen(filename));
data[8 + strlen(filename)] = '\0';
client->afc_packet->operation = AFC_OP_FILE_OPEN;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, data, 8 + strlen(filename) + 1, &bytes);
free(data);
if (ret != AFC_E_SUCCESS) {
debug_info("Didn't receive a response to the command");
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive the data
ret = afc_receive_data(client, &data, &bytes);
if ((ret == AFC_E_SUCCESS) && (bytes > 0) && data) {
afc_unlock(client);
// Get the file handle
memcpy(handle, data, sizeof(uint64_t));
free(data);
return ret;
}
debug_info("Didn't get any further data");
afc_unlock(client);
return ret;
}
/** Attempts to the read the given number of bytes from the given file.
*
* @param client The relevant AFC client
* @param handle File handle of a previously opened file
* @param data The pointer to the memory region to store the read data
* @param length The number of bytes to read
* @param bytes_read The number of bytes actually read.
*
* @return AFC_E_SUCCESS on success or an AFC_E_* error value on error.
*/
iphone_error_t
afc_file_read(afc_client_t client, uint64_t handle, char *data, uint32_t length, uint32_t *bytes_read)
{
char *input = NULL;
uint32_t current_count = 0, bytes_loc = 0;
const uint32_t MAXIMUM_READ_SIZE = 1 << 16;
afc_error_t ret = AFC_E_SUCCESS;
if (!client || !client->afc_packet || !client->connection || handle == 0)
return AFC_E_INVALID_ARGUMENT;
debug_info("called for length %i", length);
afc_lock(client);
// Looping here to get around the maximum amount of data that
// afc_receive_data can handle
while (current_count < length) {
debug_info("current count is %i but length is %i", current_count, length);
// Send the read command
AFCFilePacket *packet = (AFCFilePacket *) malloc(sizeof(AFCFilePacket));
packet->filehandle = handle;
packet->size = GUINT64_TO_LE(((length - current_count) < MAXIMUM_READ_SIZE) ? (length - current_count) : MAXIMUM_READ_SIZE);
client->afc_packet->operation = AFC_OP_READ;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, (char *) packet, sizeof(AFCFilePacket), &bytes_loc);
free(packet);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive the data
ret = afc_receive_data(client, &input, &bytes_loc);
debug_info("afc_receive_data returned error: %d", ret);
debug_info("bytes returned: %i", bytes_loc);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return ret;
} else if (bytes_loc == 0) {
if (input)
free(input);
afc_unlock(client);
*bytes_read = current_count;
/* FIXME: check that's actually a success */
return ret;
} else {
if (input) {
debug_info("%d", bytes_loc);
memcpy(data + current_count, input, (bytes_loc > length) ? length : bytes_loc);
free(input);
input = NULL;
current_count += (bytes_loc > length) ? length : bytes_loc;
}
}
}
debug_info("returning current_count as %i", current_count);
afc_unlock(client);
*bytes_read = current_count;
return ret;
}
/** Writes a given number of bytes to a file.
*
* @param client The client to use to write to the file.
* @param handle File handle of previously opened file.
* @param data The data to write to the file.
* @param length How much data to write.
* @param bytes_written The number of bytes actually written to the file.
*
* @return AFC_E_SUCCESS on success, or an AFC_E_* error value on error.
*/
iphone_error_t
afc_file_write(afc_client_t client, uint64_t handle, const char *data, uint32_t length, uint32_t *bytes_written)
{
char *acknowledgement = NULL;
const uint32_t MAXIMUM_WRITE_SIZE = 1 << 15;
uint32_t current_count = 0, i = 0;
uint32_t segments = (length / MAXIMUM_WRITE_SIZE);
uint32_t bytes_loc = 0;
char *out_buffer = NULL;
afc_error_t ret = AFC_E_SUCCESS;
if (!client || !client->afc_packet || !client->connection || !bytes_written || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
debug_info("Write length: %i", length);
// Divide the file into segments.
for (i = 0; i < segments; i++) {
// Send the segment
client->afc_packet->this_length = sizeof(AFCPacket) + 8;
client->afc_packet->entire_length = client->afc_packet->this_length + MAXIMUM_WRITE_SIZE;
client->afc_packet->operation = AFC_OP_WRITE;
out_buffer = (char *) malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket));
memcpy(out_buffer, (char *)&handle, sizeof(uint64_t));
memcpy(out_buffer + 8, data + current_count, MAXIMUM_WRITE_SIZE);
ret = afc_dispatch_packet(client, out_buffer, MAXIMUM_WRITE_SIZE + 8, &bytes_loc);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
free(out_buffer);
out_buffer = NULL;
current_count += bytes_loc;
ret = afc_receive_data(client, &acknowledgement, &bytes_loc);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return ret;
} else {
free(acknowledgement);
}
}
// By this point, we should be at the end. i.e. the last segment that
// didn't get sent in the for loop
// this length is fine because it's always sizeof(AFCPacket) + 8, but
// to be sure we do it again
if (current_count == length) {
afc_unlock(client);
*bytes_written = current_count;
return ret;
}
client->afc_packet->this_length = sizeof(AFCPacket) + 8;
client->afc_packet->entire_length = client->afc_packet->this_length + (length - current_count);
client->afc_packet->operation = AFC_OP_WRITE;
out_buffer = (char *) malloc(sizeof(char) * client->afc_packet->entire_length - sizeof(AFCPacket));
memcpy(out_buffer, (char *) &handle, sizeof(uint64_t));
memcpy(out_buffer + 8, data + current_count, (length - current_count));
ret = afc_dispatch_packet(client, out_buffer, (length - current_count) + 8, &bytes_loc);
free(out_buffer);
out_buffer = NULL;
current_count += bytes_loc;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
*bytes_written = current_count;
return AFC_E_SUCCESS;
}
ret = afc_receive_data(client, &acknowledgement, &bytes_loc);
afc_unlock(client);
if (ret != AFC_E_SUCCESS) {
debug_info("uh oh?");
} else {
free(acknowledgement);
}
*bytes_written = current_count;
return ret;
}
/** Closes a file on the phone.
*
* @param client The client to close the file with.
* @param handle File handle of a previously opened file.
*/
afc_error_t afc_file_close(afc_client_t client, uint64_t handle)
{
char *buffer = malloc(sizeof(char) * 8);
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
debug_info("File handle %i", handle);
// Send command
memcpy(buffer, &handle, sizeof(uint64_t));
client->afc_packet->operation = AFC_OP_FILE_CLOSE;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, buffer, 8, &bytes);
free(buffer);
buffer = NULL;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_UNKNOWN_ERROR;
}
// Receive the response
ret = afc_receive_data(client, &buffer, &bytes);
if (buffer)
free(buffer);
afc_unlock(client);
return ret;
}
/** Locks or unlocks a file on the phone.
*
* makes use of flock on the device, see
* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man2/flock.2.html
*
* @param client The client to lock the file with.
* @param handle File handle of a previously opened file.
* @param operation the lock or unlock operation to perform, this is one of
* AFC_LOCK_SH (shared lock), AFC_LOCK_EX (exclusive lock),
* or AFC_LOCK_UN (unlock).
*/
afc_error_t afc_file_lock(afc_client_t client, uint64_t handle, afc_lock_op_t operation)
{
char *buffer = malloc(16);
uint32_t bytes = 0;
uint64_t op = GUINT64_TO_LE(operation);
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
debug_info("file handle %i", handle);
// Send command
memcpy(buffer, &handle, sizeof(uint64_t));
memcpy(buffer + 8, &op, 8);
client->afc_packet->operation = AFC_OP_FILE_LOCK;
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
ret = afc_dispatch_packet(client, buffer, 16, &bytes);
free(buffer);
buffer = NULL;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
debug_info("could not send lock command");
return AFC_E_UNKNOWN_ERROR;
}
// Receive the response
ret = afc_receive_data(client, &buffer, &bytes);
if (buffer) {
debug_buffer(buffer, bytes);
free(buffer);
}
afc_unlock(client);
return ret;
}
/** Seeks to a given position of a pre-opened file on the phone.
*
* @param client The client to use to seek to the position.
* @param handle File handle of a previously opened.
* @param offset Seek offset.
* @param whence Seeking direction, one of SEEK_SET, SEEK_CUR, or SEEK_END.
*
* @return AFC_E_SUCCESS on success, AFC_E_NOT_ENOUGH_DATA on failure.
*/
afc_error_t afc_file_seek(afc_client_t client, uint64_t handle, int64_t offset, int whence)
{
char *buffer = (char *) malloc(sizeof(char) * 24);
int64_t offset_loc = (int64_t)GUINT64_TO_LE(offset);
uint64_t whence_loc = GUINT64_TO_LE(whence);
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send the command
memcpy(buffer, &handle, sizeof(uint64_t)); // handle
memcpy(buffer + 8, &whence_loc, sizeof(uint64_t)); // fromwhere
memcpy(buffer + 16, &offset_loc, sizeof(uint64_t)); // offset
client->afc_packet->operation = AFC_OP_FILE_SEEK;
client->afc_packet->this_length = client->afc_packet->entire_length = 0;
ret = afc_dispatch_packet(client, buffer, 24, &bytes);
free(buffer);
buffer = NULL;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &buffer, &bytes);
if (buffer)
free(buffer);
afc_unlock(client);
return ret;
}
/** Returns current position in a pre-opened file on the phone.
*
* @param client The client to use.
* @param handle File handle of a previously opened file.
* @param position Position in bytes of indicator
*
* @return AFC_E_SUCCESS on success, AFC_E_NOT_ENOUGH_DATA on failure.
*/
afc_error_t afc_file_tell(afc_client_t client, uint64_t handle, uint64_t *position)
{
char *buffer = (char *) malloc(sizeof(char) * 8);
uint32_t bytes = 0;
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send the command
memcpy(buffer, &handle, sizeof(uint64_t)); // handle
client->afc_packet->operation = AFC_OP_FILE_TELL;
client->afc_packet->this_length = client->afc_packet->entire_length = 0;
ret = afc_dispatch_packet(client, buffer, 8, &bytes);
free(buffer);
buffer = NULL;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive the data
ret = afc_receive_data(client, &buffer, &bytes);
if (bytes > 0 && buffer) {
/* Get the position */
memcpy(position, buffer, sizeof(uint64_t));
*position = GUINT64_FROM_LE(*position);
}
if (buffer)
free(buffer);
afc_unlock(client);
return ret;
}
/** Sets the size of a file on the phone.
*
* @param client The client to use to set the file size.
* @param handle File handle of a previously opened file.
* @param newsize The size to set the file to.
*
* @return 0 on success, -1 on failure.
*
* @note This function is more akin to ftruncate than truncate, and truncate
* calls would have to open the file before calling this, sadly.
*/
afc_error_t afc_file_truncate(afc_client_t client, uint64_t handle, uint64_t newsize)
{
char *buffer = (char *) malloc(sizeof(char) * 16);
uint32_t bytes = 0;
uint64_t newsize_loc = GUINT64_TO_LE(newsize);
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || (handle == 0))
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
memcpy(buffer, &handle, sizeof(uint64_t)); // handle
memcpy(buffer + 8, &newsize_loc, sizeof(uint64_t)); // newsize
client->afc_packet->operation = AFC_OP_FILE_SET_SIZE;
client->afc_packet->this_length = client->afc_packet->entire_length = 0;
ret = afc_dispatch_packet(client, buffer, 16, &bytes);
free(buffer);
buffer = NULL;
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &buffer, &bytes);
if (buffer)
free(buffer);
afc_unlock(client);
return ret;
}
/** Sets the size of a file on the phone without prior opening it.
*
* @param client The client to use to set the file size.
* @param path The path of the file to be truncated.
* @param newsize The size to set the file to.
*
* @return AFC_E_SUCCESS if everything went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_truncate(afc_client_t client, const char *path, uint64_t newsize)
{
char *response = NULL;
char *send = (char *) malloc(sizeof(char) * (strlen(path) + 1 + 8));
uint32_t bytes = 0;
uint64_t size_requested = GUINT64_TO_LE(newsize);
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !path || !client->afc_packet || !client->connection)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
memcpy(send, &size_requested, 8);
memcpy(send + 8, path, strlen(path) + 1);
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
client->afc_packet->operation = AFC_OP_TRUNCATE;
ret = afc_dispatch_packet(client, send, 8 + strlen(path) + 1, &bytes);
free(send);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
afc_unlock(client);
return ret;
}
/** Creates a hard link or symbolic link on the device.
*
* @param client The client to use for making a link
* @param type 1 = hard link, 2 = symlink
* @param target The file to be linked.
* @param linkname The name of link.
*
* @return AFC_E_SUCCESS if everything went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_make_link(afc_client_t client, afc_link_type_t linktype, const char *target, const char *linkname)
{
char *response = NULL;
char *send = (char *) malloc(sizeof(char) * (strlen(target)+1 + strlen(linkname)+1 + 8));
uint32_t bytes = 0;
uint64_t type = GUINT64_TO_LE(linktype);
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !target || !linkname || !client->afc_packet || !client->connection)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
debug_info("link type: %lld", type);
debug_info("target: %s, length:%d", target, strlen(target));
debug_info("linkname: %s, length:%d", linkname, strlen(linkname));
// Send command
memcpy(send, &type, 8);
memcpy(send + 8, target, strlen(target) + 1);
memcpy(send + 8 + strlen(target) + 1, linkname, strlen(linkname) + 1);
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
client->afc_packet->operation = AFC_OP_MAKE_LINK;
ret = afc_dispatch_packet(client, send, 8 + strlen(linkname) + 1 + strlen(target) + 1, &bytes);
free(send);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
afc_unlock(client);
return ret;
}
/** Sets the modification time of a file on the phone.
*
* @param client The client to use to set the file size.
* @param path Path of the file for which the modification time should be set.
* @param mtime The modification time to set in nanoseconds since epoch.
*
* @return AFC_E_SUCCESS if everything went well, AFC_E_INVALID_ARGUMENT
* if arguments are NULL or invalid, AFC_E_NOT_ENOUGH_DATA otherwise.
*/
afc_error_t afc_set_file_time(afc_client_t client, const char *path, uint64_t mtime)
{
char *response = NULL;
char *send = (char *) malloc(sizeof(char) * (strlen(path) + 1 + 8));
uint32_t bytes = 0;
uint64_t mtime_loc = GUINT64_TO_LE(mtime);
afc_error_t ret = AFC_E_UNKNOWN_ERROR;
if (!client || !path || !client->afc_packet || !client->connection)
return AFC_E_INVALID_ARGUMENT;
afc_lock(client);
// Send command
memcpy(send, &mtime_loc, 8);
memcpy(send + 8, path, strlen(path) + 1);
client->afc_packet->entire_length = client->afc_packet->this_length = 0;
client->afc_packet->operation = AFC_OP_SET_FILE_TIME;
ret = afc_dispatch_packet(client, send, 8 + strlen(path) + 1, &bytes);
free(send);
if (ret != AFC_E_SUCCESS) {
afc_unlock(client);
return AFC_E_NOT_ENOUGH_DATA;
}
// Receive response
ret = afc_receive_data(client, &response, &bytes);
if (response)
free(response);
afc_unlock(client);
return ret;
}
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