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Merge pull request #133 from glyptodon/rdp-disconnect-leaks

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GUAC-1164: Ensure RDP-related memory is freed between connect/disconnect cycles.
This commit is contained in:
James Muehlner 2016-03-18 14:40:55 -07:00
commit f97a681f1d
7 changed files with 95 additions and 39 deletions
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3
src/common-ssh/guac_ssh.c
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@ -128,6 +128,9 @@ static void guac_common_ssh_openssl_free_locks(int count) {
for (i=0; i < count; i++)
pthread_mutex_destroy(&(guac_common_ssh_openssl_locks[i]));
/* Free lock array */
free(guac_common_ssh_openssl_locks);
}
int guac_common_ssh_init(guac_client* client) {

1
src/common-ssh/guac_ssh_key.c
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@ -150,6 +150,7 @@ void guac_common_ssh_key_free(guac_common_ssh_key* key) {
else if (key->type == SSH_KEY_DSA)
DSA_free(key->dsa);
free(key->private_key);
free(key->public_key);
free(key);
}

1
src/libguac/client.c
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@ -482,6 +482,7 @@ void guac_client_free(guac_client* client) {
}
pthread_rwlock_destroy(&(client->__users_lock));
free(client->connection_id);
free(client);
}

6
src/protocols/rdp/input.c
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@ -165,9 +165,6 @@ int guac_rdp_user_mouse_handler(guac_user* user, int x, int y, int mask) {
pthread_mutex_lock(&(rdp_client->rdp_lock));
/* Store current mouse location */
guac_common_cursor_move(rdp_client->display->cursor, user, x, y);
/* Skip if not yet connected */
freerdp* rdp_inst = rdp_client->rdp_inst;
if (rdp_inst == NULL) {
@ -175,6 +172,9 @@ int guac_rdp_user_mouse_handler(guac_user* user, int x, int y, int mask) {
return 0;
}
/* Store current mouse location */
guac_common_cursor_move(rdp_client->display->cursor, user, x, y);
/* If button mask unchanged, just send move event */
if (mask == rdp_client->mouse_button_mask)
rdp_inst->input->MouseEvent(rdp_inst->input, PTR_FLAGS_MOVE, x, y);

32
src/protocols/rdp/rdp.c
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@ -764,8 +764,6 @@ static int guac_rdp_handle_connection(guac_client* client) {
__guac_rdp_client_load_keymap(client, settings->server_layout);
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_init(client);
/* Connect via SSH if SFTP is enabled */
if (settings->enable_sftp) {
@ -981,18 +979,28 @@ static int guac_rdp_handle_connection(guac_client* client) {
pthread_mutex_lock(&(rdp_client->rdp_lock));
/* Clean up RDP client */
/* Disconnect client and channels */
freerdp_channels_close(channels, rdp_inst);
freerdp_channels_free(channels);
freerdp_disconnect(rdp_inst);
/* Clean up RDP client context */
freerdp_clrconv_free(((rdp_freerdp_context*) rdp_inst->context)->clrconv);
cache_free(rdp_inst->context->cache);
freerdp_context_free(rdp_inst);
/* Clean up RDP client */
freerdp_free(rdp_inst);
rdp_client->rdp_inst = NULL;
/* Clean up filesystem, if allocated */
if (rdp_client->filesystem != NULL)
guac_rdp_fs_free(rdp_client->filesystem);
/* Clean up audio stream, if allocated */
if (rdp_client->audio != NULL)
guac_audio_stream_free(rdp_client->audio);
#ifdef ENABLE_COMMON_SSH
/* Free SFTP filesystem, if loaded */
if (rdp_client->sftp_filesystem)
@ -1005,8 +1013,6 @@ static int guac_rdp_handle_connection(guac_client* client) {
/* Free SFTP user */
if (rdp_client->sftp_user)
guac_common_ssh_destroy_user(rdp_client->sftp_user);
guac_common_ssh_uninit();
#endif
/* Free SVC list */
@ -1015,9 +1021,6 @@ static int guac_rdp_handle_connection(guac_client* client) {
/* Free display */
guac_common_display_free(rdp_client->display);
/* Mark FreeRDP instance as freed */
rdp_client->rdp_inst = NULL;
pthread_mutex_unlock(&(rdp_client->rdp_lock));
return 0;
@ -1027,13 +1030,20 @@ void* guac_rdp_client_thread(void* data) {
guac_client* client = (guac_client*) data;
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_init(client);
#endif
/* Continue handling connections until error or client disconnect */
while (client->state == GUAC_CLIENT_RUNNING) {
if (guac_rdp_handle_connection(client))
return NULL;
break;
}
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_uninit();
#endif
return NULL;
}

56
src/protocols/rdp/rdp_settings.c
View File

@ -765,8 +765,20 @@ void guac_rdp_settings_free(guac_rdp_settings* settings) {
free(settings->username);
/* Free channel name array */
if (settings->svc_names != NULL) {
/* Free all elements of array */
char** current = &(settings->svc_names[0]);
while (*current != NULL) {
free(*current);
current++;
}
/* Free array itself */
free(settings->svc_names);
}
#ifdef ENABLE_COMMON_SSH
/* Free SFTP settings */
free(settings->sftp_directory);
@ -852,6 +864,28 @@ static int guac_rdp_get_performance_flags(guac_rdp_settings* guac_settings) {
}
/**
* Simple wrapper for strdup() which behaves identically to standard strdup(),
* execpt that NULL will be returned if the provided string is NULL.
*
* @param str
* The string to duplicate as a newly-allocated string.
*
* @return
* A newly-allocated string containing identically the same content as the
* given string, or NULL if the given string was NULL.
*/
static char* guac_rdp_strdup(const char* str) {
/* Return NULL if no string provided */
if (str == NULL)
return NULL;
/* Otherwise just invoke strdup() */
return strdup(str);
}
void guac_rdp_push_settings(guac_rdp_settings* guac_settings, freerdp* rdp) {
BOOL bitmap_cache;
@ -859,21 +893,21 @@ void guac_rdp_push_settings(guac_rdp_settings* guac_settings, freerdp* rdp) {
/* Authentication */
#ifdef LEGACY_RDPSETTINGS
rdp_settings->domain = guac_settings->domain;
rdp_settings->username = guac_settings->username;
rdp_settings->password = guac_settings->password;
rdp_settings->domain = guac_rdp_strdup(guac_settings->domain);
rdp_settings->username = guac_rdp_strdup(guac_settings->username);
rdp_settings->password = guac_rdp_strdup(guac_settings->password);
#else
rdp_settings->Domain = guac_settings->domain;
rdp_settings->Username = guac_settings->username;
rdp_settings->Password = guac_settings->password;
rdp_settings->Domain = guac_rdp_strdup(guac_settings->domain);
rdp_settings->Username = guac_rdp_strdup(guac_settings->username);
rdp_settings->Password = guac_rdp_strdup(guac_settings->password);
#endif
/* Connection */
#ifdef LEGACY_RDPSETTINGS
rdp_settings->hostname = guac_settings->hostname;
rdp_settings->hostname = guac_rdp_strdup(guac_settings->hostname);
rdp_settings->port = guac_settings->port;
#else
rdp_settings->ServerHostname = guac_settings->hostname;
rdp_settings->ServerHostname = guac_rdp_strdup(guac_settings->hostname);
rdp_settings->ServerPort = guac_settings->port;
#endif
@ -882,13 +916,13 @@ void guac_rdp_push_settings(guac_rdp_settings* guac_settings, freerdp* rdp) {
rdp_settings->color_depth = guac_settings->color_depth;
rdp_settings->width = guac_settings->width;
rdp_settings->height = guac_settings->height;
rdp_settings->shell = guac_settings->initial_program;
rdp_settings->shell = guac_rdp_strdup(guac_settings->initial_program);
rdp_settings->kbd_layout = guac_settings->server_layout->freerdp_keyboard_layout;
#else
rdp_settings->ColorDepth = guac_settings->color_depth;
rdp_settings->DesktopWidth = guac_settings->width;
rdp_settings->DesktopHeight = guac_settings->height;
rdp_settings->AlternateShell = guac_settings->initial_program;
rdp_settings->AlternateShell = guac_rdp_strdup(guac_settings->initial_program);
rdp_settings->KeyboardLayout = guac_settings->server_layout->freerdp_keyboard_layout;
#endif
@ -1034,7 +1068,7 @@ void guac_rdp_push_settings(guac_rdp_settings* guac_settings, freerdp* rdp) {
rdp_settings->RemoteApplicationMode = TRUE;
rdp_settings->RemoteAppLanguageBarSupported = TRUE;
rdp_settings->RemoteApplicationProgram = guac_settings->remote_app;
rdp_settings->ShellWorkingDirectory = guac_settings->remote_app_dir;
rdp_settings->ShellWorkingDirectory = guac_rdp_strdup(guac_settings->remote_app_dir);
rdp_settings->RemoteApplicationCmdLine = guac_settings->remote_app_args;
#endif
}

15
src/protocols/rdp/rdp_stream.c
View File

@ -286,7 +286,15 @@ int guac_rdp_clipboard_end_handler(guac_user* user, guac_stream* stream) {
guac_client* client = user->client;
guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
rdpChannels* channels = rdp_client->rdp_inst->context->channels;
/* Terminate clipboard data with NULL */
guac_common_clipboard_append(rdp_client->clipboard, "", 1);
/* Notify RDP server of new data, if connected */
freerdp* rdp_inst = rdp_client->rdp_inst;
if (rdp_inst != NULL) {
rdpChannels* channels = rdp_inst->context->channels;
RDP_CB_FORMAT_LIST_EVENT* format_list =
(RDP_CB_FORMAT_LIST_EVENT*) freerdp_event_new(
@ -294,9 +302,6 @@ int guac_rdp_clipboard_end_handler(guac_user* user, guac_stream* stream) {
CliprdrChannel_FormatList,
NULL, NULL);
/* Terminate clipboard data with NULL */
guac_common_clipboard_append(rdp_client->clipboard, "", 1);
/* Notify server that text data is now available */
format_list->formats = (UINT32*) malloc(sizeof(UINT32) * 2);
format_list->formats[0] = CB_FORMAT_TEXT;
@ -305,6 +310,8 @@ int guac_rdp_clipboard_end_handler(guac_user* user, guac_stream* stream) {
freerdp_channels_send_event(channels, (wMessage*) format_list);
}
return 0;
}