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/*
* iphone.c
* Device discovery and communication interface.
*
* Copyright (c) 2008 Zach C. All Rights Reserved.
* Copyright (c) 2009 Nikias Bassen. 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <usbmuxd.h>
#include "iphone.h"
#include "debug.h"
static iphone_event_cb_t event_cb = NULL;
static void usbmux_event_cb(const usbmuxd_event_t *event, void *user_data)
{
iphone_event_t ev;
ev.event = event->event;
ev.uuid = event->device.uuid;
ev.conn_type = CONNECTION_USBMUXD;
if (event_cb) {
event_cb(&ev, user_data);
}
}
/**
* Register a callback function that will be called when device add/remove
* events occur.
*
* @param callback Callback function to call.
* @param user_data Application-specific data passed as parameter
* to the registered callback function.
*
* @return IPHONE_E_SUCCESS on success or an error value when an error occured.
*/
iphone_error_t iphone_event_subscribe(iphone_event_cb_t callback, void *user_data)
{
event_cb = callback;
int res = usbmuxd_subscribe(usbmux_event_cb, user_data);
if (res != 0) {
event_cb = NULL;
debug_info("Error %d when subscribing usbmux event callback!", res);
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
}
/**
* Release the event callback function that has been registered with
* iphone_event_subscribe().
*
* @return IPHONE_E_SUCCESS on success or an error value when an error occured.
*/
iphone_error_t iphone_event_unsubscribe()
{
event_cb = NULL;
int res = usbmuxd_unsubscribe();
if (res != 0) {
debug_info("Error %d when unsubscribing usbmux event callback!", res);
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
}
/**
* Get a list of currently available devices.
*
* @param devices List of uuids of devices that are currently available.
* This list is terminated by a NULL pointer.
* @param count Number of devices found.
*
* @return IPHONE_E_SUCCESS on success or an error value when an error occured.
*/
iphone_error_t iphone_get_device_list(char ***devices, int *count)
{
usbmuxd_device_info_t *dev_list;
*devices = NULL;
*count = 0;
if (usbmuxd_get_device_list(&dev_list) < 0) {
debug_info("ERROR: usbmuxd is not running!\n", __func__);
return IPHONE_E_NO_DEVICE;
}
char **newlist = NULL;
int i, newcount = 0;
for (i = 0; dev_list[i].handle > 0; i++) {
newlist = realloc(*devices, sizeof(char*) * (newcount+1));
newlist[newcount++] = strdup(dev_list[i].uuid);
*devices = newlist;
}
usbmuxd_device_list_free(&dev_list);
*count = newcount;
newlist = realloc(*devices, sizeof(char*) * (newcount+1));
newlist[newcount] = NULL;
*devices = newlist;
return IPHONE_E_SUCCESS;
}
/**
* Free a list of device uuids.
*
* @param devices List of uuids to free.
*
* @return Always returnes IPHONE_E_SUCCESS.
*/
iphone_error_t iphone_device_list_free(char **devices)
{
if (devices) {
int i = 0;
while (devices[i++]) {
free(devices[i]);
}
free(devices);
}
return IPHONE_E_SUCCESS;
}
/**
* Creates an iphone_device_t structure for the device specified by uuid,
* if the device is available.
*
* @note The resulting iphone_device_t structure has to be freed with
* iphone_device_free() if it is no longer used.
*
* @param device Upon calling this function, a pointer to a location of type
* iphone_device_t. On successful return, this location will be populated.
* @param uuid The UUID to match.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_new(iphone_device_t * device, const char *uuid)
{
usbmuxd_device_info_t muxdev;
int res = usbmuxd_get_device_by_uuid(uuid, &muxdev);
if (res > 0) {
iphone_device_t phone = (iphone_device_t) malloc(sizeof(struct iphone_device_int));
phone->uuid = strdup(muxdev.uuid);
phone->conn_type = CONNECTION_USBMUXD;
phone->conn_data = (void*)muxdev.handle;
*device = phone;
return IPHONE_E_SUCCESS;
}
/* other connection types could follow here */
return IPHONE_E_NO_DEVICE;
}
/** Cleans up an iPhone structure, then frees the structure itself.
* This is a library-level function; deals directly with the iPhone to tear
* down relations, but otherwise is mostly internal.
*
* @param device A pointer to an iPhone structure.
*/
iphone_error_t iphone_device_free(iphone_device_t device)
{
if (!device)
return IPHONE_E_INVALID_ARG;
iphone_error_t ret = IPHONE_E_UNKNOWN_ERROR;
ret = IPHONE_E_SUCCESS;
free(device->uuid);
if (device->conn_type == CONNECTION_USBMUXD) {
device->conn_data = 0;
}
if (device->conn_data) {
free(device->conn_data);
}
free(device);
return ret;
}
/**
* Set up a connection to the given device.
*
* @param device The device to connect to.
* @param dst_port The destination port to connect to.
* @param connection Pointer to an iphone_connection_t that will be filled
* with the necessary data of the connection.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_connect(iphone_device_t device, uint16_t dst_port, iphone_connection_t *connection)
{
if (!device) {
return IPHONE_E_INVALID_ARG;
}
if (device->conn_type == CONNECTION_USBMUXD) {
int sfd = usbmuxd_connect((uint32_t)(device->conn_data), dst_port);
if (sfd < 0) {
debug_info("ERROR: Connecting to usbmuxd failed: %d (%s)", sfd, strerror(-sfd));
return IPHONE_E_UNKNOWN_ERROR;
}
iphone_connection_t new_connection = (iphone_connection_t)malloc(sizeof(struct iphone_connection_int));
new_connection->type = CONNECTION_USBMUXD;
new_connection->data = (void*)sfd;
*connection = new_connection;
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", device->conn_type);
}
return IPHONE_E_UNKNOWN_ERROR;
}
/**
* Disconnect from the device and clean up the connection structure.
*
* @param connection The connection to close.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_disconnect(iphone_connection_t connection)
{
if (!connection) {
return IPHONE_E_INVALID_ARG;
}
iphone_error_t result = IPHONE_E_UNKNOWN_ERROR;
if (connection->type == CONNECTION_USBMUXD) {
usbmuxd_disconnect((int)(connection->data));
result = IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
}
free(connection);
return result;
}
/**
* Send data to a device via the given connection.
*
* @param connection The connection to send data over.
* @param data Buffer with data to send.
* @param len Size of the buffer to send.
* @param sent_bytes Pointer to an uint32_t that will be filled
* with the number of bytes actually sent.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_send(iphone_connection_t connection, const char *data, uint32_t len, uint32_t *sent_bytes)
{
if (!connection || !data) {
return IPHONE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
int res = usbmuxd_send((int)(connection->data), data, len, sent_bytes);
if (res < 0) {
debug_info("ERROR: usbmuxd_send returned %d (%s)", res, strerror(-res));
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
}
return IPHONE_E_UNKNOWN_ERROR;
}
/**
* Receive data from a device via the given connection.
* This function will return after the given timeout even if no data has been
* received.
*
* @param connection The connection to receive data from.
* @param data Buffer that will be filled with the received data.
* This buffer has to be large enough to hold len bytes.
* @param len Buffer size or number of bytes to receive.
* @param recv_bytes Number of bytes actually received.
* @param timeout Timeout in milliseconds after which this function should
* return even if no data has been received.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_recv_timeout(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
if (!connection) {
return IPHONE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
int res = usbmuxd_recv_timeout((int)(connection->data), data, len, recv_bytes, timeout);
if (res < 0) {
debug_info("ERROR: usbmuxd_recv_timeout returned %d (%s)", res, strerror(-res));
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
}
return IPHONE_E_UNKNOWN_ERROR;
}
/**
* Receive data from a device via the given connection.
* This function is like iphone_device_recv_timeout, but with a predefined
* reasonable timeout.
*
* @param connection The connection to receive data from.
* @param data Buffer that will be filled with the received data.
* This buffer has to be large enough to hold len bytes.
* @param len Buffer size or number of bytes to receive.
* @param recv_bytes Number of bytes actually received.
*
* @return IPHONE_E_SUCCESS if ok, otherwise an error code.
*/
iphone_error_t iphone_device_recv(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes)
{
if (!connection) {
return -EINVAL;
}
if (connection->type == CONNECTION_USBMUXD) {
int res = usbmuxd_recv((int)(connection->data), data, len, recv_bytes);
if (res < 0) {
debug_info("ERROR: usbmuxd_recv returned %d (%s)", res, strerror(-res));
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
}
return IPHONE_E_UNKNOWN_ERROR;
}
iphone_error_t iphone_device_get_handle(iphone_device_t device, uint32_t *handle)
{
if (!device)
return IPHONE_E_INVALID_ARG;
if (device->conn_type == CONNECTION_USBMUXD) {
*handle = (uint32_t)device->conn_data;
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", device->conn_type);
}
return IPHONE_E_UNKNOWN_ERROR;
}
iphone_error_t iphone_device_get_uuid(iphone_device_t device, char **uuid)
{
if (!device)
return IPHONE_E_INVALID_ARG;
*uuid = strdup(device->uuid);
return IPHONE_E_SUCCESS;
}
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