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idevice.c
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/*
* idevice.c
* Device discovery and communication interface.
*
* Copyright (c) 2009-2021 Nikias Bassen. All Rights Reserved.
* Copyright (c) 2014 Martin Szulecki All Rights Reserved.
* 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#include <usbmuxd.h>
#if defined(HAVE_OPENSSL)
#include <openssl/err.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#elif defined(HAVE_GNUTLS)
#include <gnutls/gnutls.h>
#elif defined(HAVE_MBEDTLS)
#include <mbedtls/rsa.h>
#include <mbedtls/ssl.h>
#include <mbedtls/entropy.h>
#include <mbedtls/ctr_drbg.h>
#include <mbedtls/debug.h>
#else
#error No supported TLS/SSL library enabled
#endif
#include <libimobiledevice-glue/socket.h>
#include <libimobiledevice-glue/thread.h>
#include "idevice.h"
#include "lockdown.h"
#include "common/userpref.h"
#include "common/debug.h"
#ifndef ECONNREFUSED
#define ECONNREFUSED 107
#endif
#ifndef ETIMEDOUT
#define ETIMEDOUT 138
#endif
#ifdef HAVE_OPENSSL
#if OPENSSL_VERSION_NUMBER < 0x10100000L || \
(defined(LIBRESSL_VERSION_NUMBER) && (LIBRESSL_VERSION_NUMBER < 0x20020000L))
#define TLS_method TLSv1_method
#endif
#if OPENSSL_VERSION_NUMBER < 0x10002000L || defined(LIBRESSL_VERSION_NUMBER)
static void SSL_COMP_free_compression_methods(void)
{
sk_SSL_COMP_free(SSL_COMP_get_compression_methods());
}
#endif
static void openssl_remove_thread_state(void)
{
/* ERR_remove_thread_state() is available since OpenSSL 1.0.0-beta1, but
* deprecated in OpenSSL 1.1.0 */
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
#if OPENSSL_VERSION_NUMBER >= 0x10000001L
ERR_remove_thread_state(NULL);
#else
ERR_remove_state(0);
#endif
#endif
}
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
static mutex_t *mutex_buf = NULL;
static void locking_function(int mode, int n, const char* file, int line)
{
if (mode & CRYPTO_LOCK)
mutex_lock(&mutex_buf[n]);
else
mutex_unlock(&mutex_buf[n]);
}
#if OPENSSL_VERSION_NUMBER < 0x10000000L
static unsigned long id_function(void)
{
return ((unsigned long)THREAD_ID);
}
#else
static void id_function(CRYPTO_THREADID *thread)
{
CRYPTO_THREADID_set_numeric(thread, (unsigned long)THREAD_ID);
}
#endif
#endif
#endif /* HAVE_OPENSSL */
static void internal_idevice_init(void)
{
#if defined(HAVE_OPENSSL)
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
int i;
SSL_library_init();
mutex_buf = malloc(CRYPTO_num_locks() * sizeof(mutex_t));
if (!mutex_buf)
return;
for (i = 0; i < CRYPTO_num_locks(); i++)
mutex_init(&mutex_buf[i]);
#if OPENSSL_VERSION_NUMBER < 0x10000000L
CRYPTO_set_id_callback(id_function);
#else
CRYPTO_THREADID_set_callback(id_function);
#endif
CRYPTO_set_locking_callback(locking_function);
#endif
#elif defined(HAVE_GNUTLS)
gnutls_global_init();
#elif defined(HAVE_MBEDTLS)
// NO-OP
#endif
}
static void internal_idevice_deinit(void)
{
#if defined(HAVE_OPENSSL)
#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
int i;
if (mutex_buf) {
#if OPENSSL_VERSION_NUMBER < 0x10000000L
CRYPTO_set_id_callback(NULL);
#else
CRYPTO_THREADID_set_callback(NULL);
#endif
CRYPTO_set_locking_callback(NULL);
for (i = 0; i < CRYPTO_num_locks(); i++)
mutex_destroy(&mutex_buf[i]);
free(mutex_buf);
mutex_buf = NULL;
}
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
SSL_COMP_free_compression_methods();
openssl_remove_thread_state();
#endif
#elif defined(HAVE_GNUTLS)
gnutls_global_deinit();
#elif defined(HAVE_MBEDTLS)
// NO-OP
#endif
}
static thread_once_t init_once = THREAD_ONCE_INIT;
static thread_once_t deinit_once = THREAD_ONCE_INIT;
#ifndef HAVE_ATTRIBUTE_CONSTRUCTOR
#if defined(__llvm__) || defined(__GNUC__)
#define HAVE_ATTRIBUTE_CONSTRUCTOR
#endif
#endif
#ifdef HAVE_ATTRIBUTE_CONSTRUCTOR
static void __attribute__((constructor)) libimobiledevice_initialize(void)
{
thread_once(&init_once, internal_idevice_init);
}
static void __attribute__((destructor)) libimobiledevice_deinitialize(void)
{
thread_once(&deinit_once, internal_idevice_deinit);
}
#elif defined(WIN32)
BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
{
switch (dwReason) {
case DLL_PROCESS_ATTACH:
thread_once(&init_once, internal_idevice_init);
break;
case DLL_PROCESS_DETACH:
thread_once(&deinit_once, internal_idevice_deinit);
break;
default:
break;
}
return 1;
}
#else
#warning No compiler support for constructor/destructor attributes, some features might not be available.
#endif
struct idevice_subscription_context {
idevice_event_cb_t callback;
void *user_data;
usbmuxd_subscription_context_t ctx;
};
static idevice_subscription_context_t event_ctx = NULL;
static void usbmux_event_cb(const usbmuxd_event_t *event, void *user_data)
{
idevice_subscription_context_t context = (idevice_subscription_context_t)user_data;
idevice_event_t ev;
ev.event = event->event;
ev.udid = event->device.udid;
ev.conn_type = 0;
if (event->device.conn_type == CONNECTION_TYPE_USB) {
ev.conn_type = CONNECTION_USBMUXD;
} else if (event->device.conn_type == CONNECTION_TYPE_NETWORK) {
ev.conn_type = CONNECTION_NETWORK;
} else {
debug_info("Unknown connection type %d", event->device.conn_type);
}
if (context->callback) {
context->callback(&ev, context->user_data);
}
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_events_subscribe(idevice_subscription_context_t *context, idevice_event_cb_t callback, void *user_data)
{
if (!context || !callback) {
return IDEVICE_E_INVALID_ARG;
}
*context = malloc(sizeof(struct idevice_subscription_context));
if (!*context) {
debug_info("ERROR: %s: Failed to allocate subscription context\n", __func__);
return IDEVICE_E_UNKNOWN_ERROR;
}
(*context)->callback = callback;
(*context)->user_data = user_data;
int res = usbmuxd_events_subscribe(&(*context)->ctx, usbmux_event_cb, *context);
if (res != 0) {
free(*context);
*context = NULL;
debug_info("ERROR: usbmuxd_subscribe() returned %d!", res);
return IDEVICE_E_UNKNOWN_ERROR;
}
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_events_unsubscribe(idevice_subscription_context_t context)
{
if (!context) {
return IDEVICE_E_INVALID_ARG;
}
int res = usbmuxd_events_unsubscribe(context->ctx);
if (res != 0) {
debug_info("ERROR: usbmuxd_unsubscribe() returned %d!", res);
return IDEVICE_E_UNKNOWN_ERROR;
}
if (context == event_ctx) {
event_ctx = NULL;
}
free(context);
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_event_subscribe(idevice_event_cb_t callback, void *user_data)
{
if (event_ctx) {
idevice_events_unsubscribe(event_ctx);
}
return idevice_events_subscribe(&event_ctx, callback, user_data);
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_event_unsubscribe(void)
{
if (!event_ctx) {
return IDEVICE_E_SUCCESS;
}
event_ctx->callback = NULL;
return idevice_events_unsubscribe(event_ctx);
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_get_device_list_extended(idevice_info_t **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!", __func__);
return IDEVICE_E_NO_DEVICE;
}
idevice_info_t *newlist = NULL;
int i, newcount = 0;
for (i = 0; dev_list[i].handle > 0; i++) {
newlist = realloc(*devices, sizeof(idevice_info_t) * (newcount+1));
newlist[newcount] = malloc(sizeof(struct idevice_info));
newlist[newcount]->udid = strdup(dev_list[i].udid);
if (dev_list[i].conn_type == CONNECTION_TYPE_USB) {
newlist[newcount]->conn_type = CONNECTION_USBMUXD;
newlist[newcount]->conn_data = NULL;
} else if (dev_list[i].conn_type == CONNECTION_TYPE_NETWORK) {
newlist[newcount]->conn_type = CONNECTION_NETWORK;
struct sockaddr* saddr = (struct sockaddr*)(dev_list[i].conn_data);
size_t addrlen = 0;
switch (saddr->sa_family) {
case AF_INET:
addrlen = sizeof(struct sockaddr_in);
break;
#ifdef AF_INET6
case AF_INET6:
addrlen = sizeof(struct sockaddr_in6);
break;
#endif
default:
debug_info("Unsupported address family 0x%02x\n", saddr->sa_family);
continue;
}
newlist[newcount]->conn_data = malloc(addrlen);
memcpy(newlist[newcount]->conn_data, dev_list[i].conn_data, addrlen);
}
newcount++;
*devices = newlist;
}
usbmuxd_device_list_free(&dev_list);
*count = newcount;
newlist = realloc(*devices, sizeof(idevice_info_t) * (newcount+1));
newlist[newcount] = NULL;
*devices = newlist;
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_device_list_extended_free(idevice_info_t *devices)
{
if (devices) {
int i = 0;
while (devices[i]) {
free(devices[i]->udid);
free(devices[i]->conn_data);
free(devices[i]);
i++;
}
free(devices);
}
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_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!", __func__);
return IDEVICE_E_NO_DEVICE;
}
char **newlist = NULL;
int i, newcount = 0;
for (i = 0; dev_list[i].handle > 0; i++) {
if (dev_list[i].conn_type == CONNECTION_TYPE_USB) {
newlist = realloc(*devices, sizeof(char*) * (newcount+1));
newlist[newcount++] = strdup(dev_list[i].udid);
*devices = newlist;
}
}
usbmuxd_device_list_free(&dev_list);
*count = newcount;
newlist = realloc(*devices, sizeof(char*) * (newcount+1));
newlist[newcount] = NULL;
*devices = newlist;
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_device_list_free(char **devices)
{
if (devices) {
int i = 0;
while (devices[i]) {
free(devices[i]);
i++;
}
free(devices);
}
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API void idevice_set_debug_level(int level)
{
internal_set_debug_level(level);
}
static idevice_t idevice_from_mux_device(usbmuxd_device_info_t *muxdev)
{
if (!muxdev)
return NULL;
idevice_t device = (idevice_t)malloc(sizeof(struct idevice_private));
if (!device)
return NULL;
device->udid = strdup(muxdev->udid);
device->mux_id = muxdev->handle;
device->version = 0;
device->device_class = 0;
switch (muxdev->conn_type) {
case CONNECTION_TYPE_USB:
device->conn_type = CONNECTION_USBMUXD;
device->conn_data = NULL;
break;
case CONNECTION_TYPE_NETWORK:
device->conn_type = CONNECTION_NETWORK;
struct sockaddr* saddr = (struct sockaddr*)(muxdev->conn_data);
size_t addrlen = 0;
switch (saddr->sa_family) {
case AF_INET:
addrlen = sizeof(struct sockaddr_in);
break;
#ifdef AF_INET6
case AF_INET6:
addrlen = sizeof(struct sockaddr_in6);
break;
#endif
default:
debug_info("Unsupported address family 0x%02x\n", saddr->sa_family);
free(device->udid);
free(device);
return NULL;
}
device->conn_data = malloc(addrlen);
memcpy(device->conn_data, muxdev->conn_data, addrlen);
break;
default:
device->conn_type = 0;
device->conn_data = NULL;
break;
}
return device;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_new_with_options(idevice_t * device, const char *udid, enum idevice_options options)
{
usbmuxd_device_info_t muxdev;
int usbmux_options = 0;
if (options & IDEVICE_LOOKUP_USBMUX) {
usbmux_options |= DEVICE_LOOKUP_USBMUX;
}
if (options & IDEVICE_LOOKUP_NETWORK) {
usbmux_options |= DEVICE_LOOKUP_NETWORK;
}
if (options & IDEVICE_LOOKUP_PREFER_NETWORK) {
usbmux_options |= DEVICE_LOOKUP_PREFER_NETWORK;
}
int res = usbmuxd_get_device(udid, &muxdev, usbmux_options);
if (res > 0) {
*device = idevice_from_mux_device(&muxdev);
if (!*device) {
return IDEVICE_E_UNKNOWN_ERROR;
}
return IDEVICE_E_SUCCESS;
}
return IDEVICE_E_NO_DEVICE;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_new(idevice_t * device, const char *udid)
{
return idevice_new_with_options(device, udid, 0);
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_free(idevice_t device)
{
if (!device)
return IDEVICE_E_INVALID_ARG;
idevice_error_t ret = IDEVICE_E_UNKNOWN_ERROR;
ret = IDEVICE_E_SUCCESS;
free(device->udid);
if (device->conn_data) {
free(device->conn_data);
}
free(device);
return ret;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_connect(idevice_t device, uint16_t port, idevice_connection_t *connection)
{
if (!device) {
return IDEVICE_E_INVALID_ARG;
}
if (device->conn_type == CONNECTION_USBMUXD) {
int sfd = usbmuxd_connect(device->mux_id, port);
if (sfd < 0) {
debug_info("ERROR: Connecting to usbmux device failed: %d (%s)", sfd, strerror(-sfd));
switch (-sfd) {
case ECONNREFUSED:
return IDEVICE_E_CONNREFUSED;
case ENODEV:
return IDEVICE_E_NO_DEVICE;
default:
break;
}
return IDEVICE_E_UNKNOWN_ERROR;
}
idevice_connection_t new_connection = (idevice_connection_t)malloc(sizeof(struct idevice_connection_private));
new_connection->type = CONNECTION_USBMUXD;
new_connection->data = (void*)(long)sfd;
new_connection->ssl_data = NULL;
new_connection->device = device;
new_connection->ssl_recv_timeout = (unsigned int)-1;
new_connection->status = IDEVICE_E_SUCCESS;
*connection = new_connection;
return IDEVICE_E_SUCCESS;
}
if (device->conn_type == CONNECTION_NETWORK) {
struct sockaddr* saddr = (struct sockaddr*)(device->conn_data);
switch (saddr->sa_family) {
case AF_INET:
#ifdef AF_INET6
case AF_INET6:
#endif
break;
default:
debug_info("Unsupported address family 0x%02x", saddr->sa_family);
return IDEVICE_E_UNKNOWN_ERROR;
}
char addrtxt[48];
addrtxt[0] = '\0';
if (!socket_addr_to_string(saddr, addrtxt, sizeof(addrtxt))) {
debug_info("Failed to convert network address: %d (%s)", errno, strerror(errno));
}
debug_info("Connecting to %s port %d...", addrtxt, port);
int sfd = socket_connect_addr(saddr, port);
if (sfd < 0) {
int result = errno;
debug_info("ERROR: Connecting to network device failed: %d (%s)", result, strerror(result));
switch (result) {
case ECONNREFUSED:
return IDEVICE_E_CONNREFUSED;
default:
break;
}
return IDEVICE_E_NO_DEVICE;
}
idevice_connection_t new_connection = (idevice_connection_t)malloc(sizeof(struct idevice_connection_private));
new_connection->type = CONNECTION_NETWORK;
new_connection->data = (void*)(long)sfd;
new_connection->ssl_data = NULL;
new_connection->device = device;
new_connection->ssl_recv_timeout = (unsigned int)-1;
*connection = new_connection;
return IDEVICE_E_SUCCESS;
}
debug_info("Unknown connection type %d", device->conn_type);
return IDEVICE_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_disconnect(idevice_connection_t connection)
{
if (!connection) {
return IDEVICE_E_INVALID_ARG;
}
/* shut down ssl if enabled */
if (connection->ssl_data) {
idevice_connection_disable_ssl(connection);
}
idevice_error_t result = IDEVICE_E_UNKNOWN_ERROR;
if (connection->type == CONNECTION_USBMUXD) {
usbmuxd_disconnect((int)(long)connection->data);
connection->data = NULL;
result = IDEVICE_E_SUCCESS;
} else if (connection->type == CONNECTION_NETWORK) {
socket_close((int)(long)connection->data);
connection->data = NULL;
result = IDEVICE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
}
free(connection);
connection = NULL;
return result;
}
/**
* Internally used function to send raw data over the given connection.
*/
static idevice_error_t internal_connection_send(idevice_connection_t connection, const char *data, uint32_t len, uint32_t *sent_bytes)
{
if (!connection || !data) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
int res;
do {
res = usbmuxd_send((int)(long)connection->data, data, len, sent_bytes);
} while (res == -EAGAIN);
if (res < 0) {
debug_info("ERROR: usbmuxd_send returned %d (%s)", res, strerror(-res));
return IDEVICE_E_UNKNOWN_ERROR;
}
return IDEVICE_E_SUCCESS;
}
if (connection->type == CONNECTION_NETWORK) {
int s = socket_send((int)(long)connection->data, (void*)data, len);
if (s < 0) {
*sent_bytes = 0;
return IDEVICE_E_UNKNOWN_ERROR;
}
*sent_bytes = s;
return IDEVICE_E_SUCCESS;
}
debug_info("Unknown connection type %d", connection->type);
return IDEVICE_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_send(idevice_connection_t connection, const char *data, uint32_t len, uint32_t *sent_bytes)
{
if (!connection || !data
#if defined(HAVE_OPENSSL) || defined(HAVE_GNUTLS)
|| (connection->ssl_data && !connection->ssl_data->session)
#endif
) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->ssl_data) {
connection->status = IDEVICE_E_SUCCESS;
uint32_t sent = 0;
while (sent < len) {
#if defined(HAVE_OPENSSL)
int s = SSL_write(connection->ssl_data->session, (const void*)(data+sent), (int)(len-sent));
if (s <= 0) {
int sslerr = SSL_get_error(connection->ssl_data->session, s);
if (sslerr == SSL_ERROR_WANT_WRITE) {
continue;
}
break;
}
#elif defined(HAVE_GNUTLS)
ssize_t s = gnutls_record_send(connection->ssl_data->session, (void*)(data+sent), (size_t)(len-sent));
#elif defined(HAVE_MBEDTLS)
int s = mbedtls_ssl_write(&connection->ssl_data->ctx, (const unsigned char*)(data+sent), (size_t)(len-sent));
#endif
if (s < 0) {
break;
}
sent += s;
}
debug_info("SSL_write %d, sent %d", len, sent);
if (sent < len) {
*sent_bytes = 0;
return connection->status == IDEVICE_E_SUCCESS ? IDEVICE_E_SSL_ERROR : connection->status;
}
*sent_bytes = sent;
return IDEVICE_E_SUCCESS;
}
uint32_t sent = 0;
while (sent < len) {
uint32_t bytes = 0;
int s = internal_connection_send(connection, data+sent, len-sent, &bytes);
if (s < 0) {
break;
}
sent += bytes;
}
debug_info("internal_connection_send %d, sent %d", len, sent);
if (sent < len) {
*sent_bytes = sent;
if (sent == 0) {
return IDEVICE_E_UNKNOWN_ERROR;
}
return IDEVICE_E_NOT_ENOUGH_DATA;
}
*sent_bytes = sent;
return IDEVICE_E_SUCCESS;
}
static inline idevice_error_t socket_recv_to_idevice_error(int conn_error, uint32_t len, uint32_t received)
{
if (conn_error < 0) {
switch (conn_error) {
case -EAGAIN:
if (len) {
debug_info("ERROR: received partial data %d/%d (%s)", received, len, strerror(-conn_error));
} else {
debug_info("ERROR: received partial data (%s)", strerror(-conn_error));
}
return IDEVICE_E_NOT_ENOUGH_DATA;
case -ETIMEDOUT:
return IDEVICE_E_TIMEOUT;
default:
return IDEVICE_E_UNKNOWN_ERROR;
}
}
return IDEVICE_E_SUCCESS;
}
/**
* Internally used function for receiving raw data over the given connection
* using a timeout.
*/
static idevice_error_t internal_connection_receive_timeout(idevice_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
if (!connection) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
int conn_error = usbmuxd_recv_timeout((int)(long)connection->data, data, len, recv_bytes, timeout);
idevice_error_t error = socket_recv_to_idevice_error(conn_error, len, *recv_bytes);
if (error == IDEVICE_E_UNKNOWN_ERROR) {
debug_info("ERROR: usbmuxd_recv_timeout returned %d (%s)", conn_error, strerror(-conn_error));
}
return error;
}
if (connection->type == CONNECTION_NETWORK) {
int res = socket_receive_timeout((int)(long)connection->data, data, len, 0, timeout);
idevice_error_t error = socket_recv_to_idevice_error(res, 0, 0);
if (error == IDEVICE_E_SUCCESS) {
*recv_bytes = (uint32_t)res;
} else if (error == IDEVICE_E_UNKNOWN_ERROR) {
debug_info("ERROR: socket_receive_timeout returned %d (%s)", res, strerror(-res));
}
return error;
}
debug_info("Unknown connection type %d", connection->type);
return IDEVICE_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_receive_timeout(idevice_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
if (!connection
#if defined(HAVE_OPENSSL) || defined(HAVE_GNUTLS)
|| (connection->ssl_data && !connection->ssl_data->session)
#endif
|| len == 0
) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->ssl_data) {
uint32_t received = 0;
if (connection->ssl_recv_timeout != (unsigned int)-1) {
debug_info("WARNING: ssl_recv_timeout was not properly reset in idevice_connection_receive_timeout");
}
// this should be reset after the SSL_read call on all codepaths, as
// the supplied timeout should only apply to the current read.
connection->ssl_recv_timeout = timeout;
connection->status = IDEVICE_E_SUCCESS;
while (received < len) {
#if defined(HAVE_OPENSSL)
int r = SSL_read(connection->ssl_data->session, (void*)((char*)(data+received)), (int)len-received);
if (r > 0) {
received += r;
} else {
int sslerr = SSL_get_error(connection->ssl_data->session, r);
if (sslerr == SSL_ERROR_WANT_READ) {
continue;
} else if (sslerr == SSL_ERROR_ZERO_RETURN) {
if (connection->status == IDEVICE_E_TIMEOUT) {
SSL_set_shutdown(connection->ssl_data->session, 0);
}
}
break;
}
#elif defined(HAVE_GNUTLS)
ssize_t r = gnutls_record_recv(connection->ssl_data->session, (void*)(data+received), (size_t)len-received);
if (r > 0) {
received += r;
} else {
break;
}
#elif defined(HAVE_MBEDTLS)
int r = mbedtls_ssl_read(&connection->ssl_data->ctx, (void*)(data+received), (size_t)len-received);
if (r > 0) {
received += r;
} else {
break;
}
#endif
}
connection->ssl_recv_timeout = (unsigned int)-1;
debug_info("SSL_read %d, received %d", len, received);
if (received < len) {
*recv_bytes = received;
return connection->status == IDEVICE_E_SUCCESS ? IDEVICE_E_SSL_ERROR : connection->status;
}
*recv_bytes = received;
return IDEVICE_E_SUCCESS;
}
return internal_connection_receive_timeout(connection, data, len, recv_bytes, timeout);
}
/**
* Internally used function for receiving raw data over the given connection.
*/
static idevice_error_t internal_connection_receive(idevice_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes)
{
if (!connection) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
int res = usbmuxd_recv((int)(long)connection->data, data, len, recv_bytes);
if (res < 0) {
debug_info("ERROR: usbmuxd_recv returned %d (%s)", res, strerror(-res));
return IDEVICE_E_UNKNOWN_ERROR;
}
return IDEVICE_E_SUCCESS;
}
if (connection->type == CONNECTION_NETWORK) {
int res = socket_receive((int)(long)connection->data, data, len);
if (res < 0) {
debug_info("ERROR: socket_receive returned %d (%s)", res, strerror(-res));
return IDEVICE_E_UNKNOWN_ERROR;
}
*recv_bytes = (uint32_t)res;
return IDEVICE_E_SUCCESS;
}
debug_info("Unknown connection type %d", connection->type);
return IDEVICE_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_receive(idevice_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes)
{
if (!connection
#if defined(HAVE_OPENSSL) || defined(HAVE_GNUTLS)
|| (connection->ssl_data && !connection->ssl_data->session)
#endif
) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->ssl_data) {
if (connection->ssl_recv_timeout != (unsigned int)-1) {
debug_info("WARNING: ssl_recv_timeout was not properly reset in idevice_connection_receive_timeout");
connection->ssl_recv_timeout = (unsigned int)-1;
}
#if defined(HAVE_OPENSSL)
int received = SSL_read(connection->ssl_data->session, (void*)data, (int)len);
debug_info("SSL_read %d, received %d", len, received);
#elif defined(HAVE_GNUTLS)
ssize_t received = gnutls_record_recv(connection->ssl_data->session, (void*)data, (size_t)len);
#elif defined(HAVE_MBEDTLS)
int received = mbedtls_ssl_read(&connection->ssl_data->ctx, (unsigned char*)data, (size_t)len);
#endif
if (received > 0) {
*recv_bytes = received;
return IDEVICE_E_SUCCESS;
}
*recv_bytes = 0;
return IDEVICE_E_SSL_ERROR;
}
return internal_connection_receive(connection, data, len, recv_bytes);
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_get_fd(idevice_connection_t connection, int *fd)
{
if (!connection || !fd) {
return IDEVICE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
*fd = (int)(long)connection->data;
return IDEVICE_E_SUCCESS;
}
if (connection->type == CONNECTION_NETWORK) {
*fd = (int)(long)connection->data;
return IDEVICE_E_SUCCESS;
}
debug_info("Unknown connection type %d", connection->type);
return IDEVICE_E_UNKNOWN_ERROR;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_get_handle(idevice_t device, uint32_t *handle)
{
if (!device || !handle)
return IDEVICE_E_INVALID_ARG;
*handle = device->mux_id;
return IDEVICE_E_SUCCESS;
}
LIBIMOBILEDEVICE_API idevice_error_t idevice_get_udid(idevice_t device, char **udid)
{
if (!device || !udid)
return IDEVICE_E_INVALID_ARG;
if (device->udid) {
*udid = strdup(device->udid);
}
return IDEVICE_E_SUCCESS;
}
#if defined(HAVE_OPENSSL) || defined(HAVE_GNUTLS)
typedef ssize_t ssl_cb_ret_type_t;
#elif defined(HAVE_MBEDTLS)
typedef int ssl_cb_ret_type_t;
#endif
/**
* Internally used SSL callback function for receiving encrypted data.
*/
static ssl_cb_ret_type_t internal_ssl_read(idevice_connection_t connection, char *buffer, size_t length)
{
uint32_t bytes = 0;
uint32_t pos = 0;
idevice_error_t res;
unsigned int timeout = connection->ssl_recv_timeout;
debug_info("pre-read length = %zi bytes", length);
/* repeat until we have the full data or an error occurs */
do {
bytes = 0;
if (timeout == (unsigned int)-1) {
res = internal_connection_receive(connection, buffer + pos, (uint32_t)length - pos, &bytes);
} else {
res = internal_connection_receive_timeout(connection, buffer + pos, (uint32_t)length - pos, &bytes, (unsigned int)timeout);
}
if (res != IDEVICE_E_SUCCESS) {
if (res != IDEVICE_E_TIMEOUT) {
debug_info("ERROR: %s returned %d", (timeout == (unsigned int)-1) ? "internal_connection_receive" : "internal_connection_receive_timeout", res);
}
connection->status = res;
return -1;
}
debug_info("read %i bytes", bytes);
/* increase read count */
pos += bytes;
if (pos < (uint32_t)length) {
debug_info("re-read trying to read missing %i bytes", (uint32_t)length - pos);
}
} while (pos < (uint32_t)length);
debug_info("post-read received %i bytes", pos);
return pos;
}
/**
* Internally used SSL callback function for sending encrypted data.
*/