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/*
* companion_proxy.c
* com.apple.companion_proxy service implementation.
*
* Copyright (c) 2019-2020 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <plist/plist.h>
#include "companion_proxy.h"
#include "lockdown.h"
#include "common/debug.h"
/**
* Convert a property_list_service_error_t value to a companion_proxy_error_t value.
* Used internally to get correct error codes.
*
* @param err An property_list_service_error_t error code
*
* @return A matching companion_proxy_error_t error code,
* COMPANION_PROXY_E_UNKNOWN_ERROR otherwise.
*/
static companion_proxy_error_t companion_proxy_error(property_list_service_error_t err)
{
switch (err) {
case PROPERTY_LIST_SERVICE_E_SUCCESS:
return COMPANION_PROXY_E_SUCCESS;
case PROPERTY_LIST_SERVICE_E_INVALID_ARG:
return COMPANION_PROXY_E_INVALID_ARG;
case PROPERTY_LIST_SERVICE_E_PLIST_ERROR:
return COMPANION_PROXY_E_PLIST_ERROR;
case PROPERTY_LIST_SERVICE_E_MUX_ERROR:
return COMPANION_PROXY_E_MUX_ERROR;
case PROPERTY_LIST_SERVICE_E_SSL_ERROR:
return COMPANION_PROXY_E_SSL_ERROR;
case PROPERTY_LIST_SERVICE_E_NOT_ENOUGH_DATA:
return COMPANION_PROXY_E_NOT_ENOUGH_DATA;
case PROPERTY_LIST_SERVICE_E_RECEIVE_TIMEOUT:
return COMPANION_PROXY_E_TIMEOUT;
default:
break;
}
return COMPANION_PROXY_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_client_new(idevice_t device, lockdownd_service_descriptor_t service, companion_proxy_client_t * client)
{
*client = NULL;
if (!device || !service || service->port == 0 || !client || *client) {
debug_info("Incorrect parameter passed to companion_proxy_client_new.");
return COMPANION_PROXY_E_INVALID_ARG;
}
debug_info("Creating companion_proxy_client, port = %d.", service->port);
property_list_service_client_t plclient = NULL;
companion_proxy_error_t ret = companion_proxy_error(property_list_service_client_new(device, service, &plclient));
if (ret != COMPANION_PROXY_E_SUCCESS) {
debug_info("Creating a property list client failed. Error: %i", ret);
return ret;
}
companion_proxy_client_t client_loc = (companion_proxy_client_t) malloc(sizeof(struct companion_proxy_client_private));
client_loc->parent = plclient;
client_loc->event_thread = THREAD_T_NULL;
*client = client_loc;
debug_info("Created companion_proxy_client successfully.");
return COMPANION_PROXY_E_SUCCESS;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_client_start_service(idevice_t device, companion_proxy_client_t * client, const char* label)
{
companion_proxy_error_t err = COMPANION_PROXY_E_UNKNOWN_ERROR;
service_client_factory_start_service(device, COMPANION_PROXY_SERVICE_NAME, (void**)client, label, SERVICE_CONSTRUCTOR(companion_proxy_client_new), &err);
return err;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_client_free(companion_proxy_client_t client)
{
if (!client)
return COMPANION_PROXY_E_INVALID_ARG;
property_list_service_client_t parent = client->parent;
client->parent = NULL;
if (client->event_thread) {
debug_info("joining event thread");
thread_join(client->event_thread);
thread_free(client->event_thread);
client->event_thread = THREAD_T_NULL;
}
companion_proxy_error_t err = companion_proxy_error(property_list_service_client_free(parent));
free(client);
return err;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_send(companion_proxy_client_t client, plist_t plist)
{
companion_proxy_error_t res = COMPANION_PROXY_E_UNKNOWN_ERROR;
res = companion_proxy_error(property_list_service_send_binary_plist(client->parent, plist));
if (res != COMPANION_PROXY_E_SUCCESS) {
debug_info("Sending plist failed with error %d", res);
return res;
}
return res;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_receive(companion_proxy_client_t client, plist_t * plist)
{
companion_proxy_error_t res = COMPANION_PROXY_E_UNKNOWN_ERROR;
plist_t outplist = NULL;
res = companion_proxy_error(property_list_service_receive_plist_with_timeout(client->parent, &outplist, 10000));
if (res != COMPANION_PROXY_E_SUCCESS && res != COMPANION_PROXY_E_TIMEOUT) {
debug_info("Could not receive plist, error %d", res);
plist_free(outplist);
} else if (res == COMPANION_PROXY_E_SUCCESS) {
*plist = outplist;
}
return res;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_get_device_registry(companion_proxy_client_t client, plist_t* paired_devices)
{
if (!client || !paired_devices) {
return COMPANION_PROXY_E_INVALID_ARG;
}
plist_t dict = plist_new_dict();
plist_dict_set_item(dict, "Command", plist_new_string("GetDeviceRegistry"));
companion_proxy_error_t res = companion_proxy_send(client, dict);
plist_free(dict);
dict = NULL;
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
res = companion_proxy_receive(client, &dict);
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
if (!dict || !PLIST_IS_DICT(dict)) {
return COMPANION_PROXY_E_PLIST_ERROR;
}
plist_t val = plist_dict_get_item(dict, "PairedDevicesArray");
if (val) {
*paired_devices = plist_copy(val);
res = COMPANION_PROXY_E_SUCCESS;
} else {
res = COMPANION_PROXY_E_UNKNOWN_ERROR;
val = plist_dict_get_item(dict, "Error");
if (val) {
if (plist_string_val_compare(val, "NoPairedWatches")) {
res = COMPANION_PROXY_E_NO_DEVICES;
}
}
}
plist_free(dict);
return res;
}
struct companion_proxy_cb_data {
companion_proxy_client_t client;
companion_proxy_device_event_cb_t cbfunc;
void* user_data;
};
static void* companion_proxy_event_thread(void* arg)
{
struct companion_proxy_cb_data* data = (struct companion_proxy_cb_data*)arg;
companion_proxy_client_t client = data->client;
companion_proxy_error_t res;
plist_t command = plist_new_dict();
plist_dict_set_item(command, "Command", plist_new_string("StartListeningForDevices"));
res = companion_proxy_send(client, command);
plist_free(command);
if (res != COMPANION_PROXY_E_SUCCESS) {
free(data);
client->event_thread = THREAD_T_NULL;
return NULL;
}
while (client && client->parent) {
plist_t node = NULL;
res = companion_proxy_error(property_list_service_receive_plist_with_timeout(client->parent, &node, 1000));
if (res != COMPANION_PROXY_E_SUCCESS && res != COMPANION_PROXY_E_TIMEOUT) {
debug_info("could not receive plist, error %d", res);
break;
}
if (node) {
data->cbfunc(node, data->user_data);
}
plist_free(node);
}
client->event_thread = THREAD_T_NULL;
free(data);
return NULL;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_start_listening_for_devices(companion_proxy_client_t client, companion_proxy_device_event_cb_t callback, void* userdata)
{
if (!client || !client->parent || !callback) {
return COMPANION_PROXY_E_INVALID_ARG;
}
if (client->event_thread) {
return COMPANION_PROXY_E_OP_IN_PROGRESS;
}
companion_proxy_error_t res = COMPANION_PROXY_E_UNKNOWN_ERROR;
struct companion_proxy_cb_data *data = (struct companion_proxy_cb_data*)malloc(sizeof(struct companion_proxy_cb_data));
if (data) {
data->client = client;
data->cbfunc = callback;
data->user_data = userdata;
if (thread_new(&client->event_thread, companion_proxy_event_thread, data) == 0) {
res = COMPANION_PROXY_E_SUCCESS;
} else {
free(data);
}
}
return res;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_stop_listening_for_devices(companion_proxy_client_t client)
{
property_list_service_client_t parent = client->parent;
client->parent = NULL;
if (client->event_thread) {
debug_info("joining event thread");
thread_join(client->event_thread);
thread_free(client->event_thread);
client->event_thread = THREAD_T_NULL;
}
client->parent = parent;
return COMPANION_PROXY_E_SUCCESS;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_get_value_from_registry(companion_proxy_client_t client, const char* companion_udid, const char* key, plist_t* value)
{
if (!client || !companion_udid || !key || !value) {
return COMPANION_PROXY_E_INVALID_ARG;
}
plist_t dict = plist_new_dict();
plist_dict_set_item(dict, "Command", plist_new_string("GetValueFromRegistry"));
plist_dict_set_item(dict, "GetValueGizmoUDIDKey", plist_new_string(companion_udid));
plist_dict_set_item(dict, "GetValueKeyKey", plist_new_string(key));
companion_proxy_error_t res = companion_proxy_send(client, dict);
plist_free(dict);
dict = NULL;
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
res = companion_proxy_receive(client, &dict);
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
if (!dict || !PLIST_IS_DICT(dict)) {
return COMPANION_PROXY_E_PLIST_ERROR;
}
plist_t val = plist_dict_get_item(dict, "RetrievedValueDictionary");
if (val) {
*value = plist_copy(val);
res = COMPANION_PROXY_E_SUCCESS;
} else {
res = COMPANION_PROXY_E_UNKNOWN_ERROR;
val = plist_dict_get_item(dict, "Error");
if (val) {
if (!plist_string_val_compare(val, "UnsupportedWatchKey")) {
res = COMPANION_PROXY_E_UNSUPPORTED_KEY;
} else if (plist_string_val_compare(val, "TimeoutReply")) {
res = COMPANION_PROXY_E_TIMEOUT_REPLY;
}
}
}
plist_free(dict);
return res;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_start_forwarding_service_port(companion_proxy_client_t client, uint16_t remote_port, const char* service_name, uint16_t* forward_port, plist_t options)
{
if (!client) {
return COMPANION_PROXY_E_INVALID_ARG;
}
plist_t dict = plist_new_dict();
plist_dict_set_item(dict, "Command", plist_new_string("StartForwardingServicePort"));
plist_dict_set_item(dict, "GizmoRemotePortNumber", plist_new_uint(remote_port));
if (service_name) {
plist_dict_set_item(dict, "ForwardedServiceName", plist_new_string(service_name));
}
plist_dict_set_item(dict, "IsServiceLowPriority", plist_new_bool(0));
plist_dict_set_item(dict, "PreferWifi", plist_new_bool(0));
if (options) {
plist_dict_merge(&dict, options);
}
companion_proxy_error_t res = companion_proxy_send(client, dict);
plist_free(dict);
dict = NULL;
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
res = companion_proxy_receive(client, &dict);
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
plist_t val = plist_dict_get_item(dict, "CompanionProxyServicePort");
if (val) {
uint64_t u64val = 0;
plist_get_uint_val(val, &u64val);
*forward_port = (uint16_t)u64val;
res = COMPANION_PROXY_E_SUCCESS;
} else {
res = COMPANION_PROXY_E_UNKNOWN_ERROR;
}
plist_free(dict);
return res;
}
LIBIMOBILEDEVICE_API companion_proxy_error_t companion_proxy_stop_forwarding_service_port(companion_proxy_client_t client, uint16_t remote_port)
{
if (!client) {
return COMPANION_PROXY_E_INVALID_ARG;
}
plist_t dict = plist_new_dict();
plist_dict_set_item(dict, "Command", plist_new_string("StopForwardingServicePort"));
plist_dict_set_item(dict, "GizmoRemotePortNumber", plist_new_uint(remote_port));
companion_proxy_error_t res = companion_proxy_send(client, dict);
plist_free(dict);
dict = NULL;
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
res = companion_proxy_receive(client, &dict);
if (res != COMPANION_PROXY_E_SUCCESS) {
return res;
}
plist_free(dict);
return res;
}
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