From: Michael Jumper <zhangmaike@users.sourceforge.net>
Date: Mon, 30 Apr 2012 06:33:27 +0000 (-0700)
Subject: Free clipboard data properly.
X-Git-Url: http://git.alex.org.uk

Free clipboard data properly.
---

diff --git a/include/client.h b/include/client.h
index f3e4dad..02c6ab6 100644
--- a/include/client.h
+++ b/include/client.h
@@ -82,7 +82,7 @@ typedef struct rdp_guac_client_data {
 
     guac_rdp_keysym_state_map keysym_state;
 
-    const char* clipboard;
+    char* clipboard;
 
 } rdp_guac_client_data;
 
diff --git a/src/client.c b/src/client.c
index e8c511f..1dcd309 100644
--- a/src/client.c
+++ b/src/client.c
@@ -368,7 +368,7 @@ int guac_client_init(guac_client* client, int argc, char** argv) {
     guac_client_data->rdp_inst = rdp_inst;
     guac_client_data->mouse_button_mask = 0;
     guac_client_data->current_surface = GUAC_DEFAULT_LAYER;
-    guac_client_data->clipboard = "";
+    guac_client_data->clipboard = NULL;
 
     /* Clear keysym state mapping and keymap */
     memset(guac_client_data->keysym_state, 0,
diff --git a/src/guac_handlers.c b/src/guac_handlers.c
index e5977f2..3b60a28 100644
--- a/src/guac_handlers.c
+++ b/src/guac_handlers.c
@@ -420,6 +420,9 @@ int rdp_guac_client_clipboard_handler(guac_client* client, char* data) {
             RDP_EVENT_TYPE_CB_FORMAT_LIST,
             NULL, NULL);
 
+    /* Free existing data */
+    free(((rdp_guac_client_data*) client->data)->clipboard);
+
     /* Store data in client */
     ((rdp_guac_client_data*) client->data)->clipboard = strdup(data);
 
diff --git a/src/rdp_cliprdr.c b/src/rdp_cliprdr.c
index 7770ef9..ff9860a 100644
--- a/src/rdp_cliprdr.c
+++ b/src/rdp_cliprdr.c
@@ -157,8 +157,14 @@ void guac_rdp_process_cb_data_request(guac_client* client,
                     NULL, NULL);
 
         /* Set data and length */
-        data_response->data = (uint8*) strdup(clipboard);
-        data_response->size = strlen(clipboard) + 1;
+        if (clipboard != NULL) {
+            data_response->data = (uint8*) strdup(clipboard);
+            data_response->size = strlen(clipboard) + 1;
+        }
+        else {
+            data_response->data = (uint8*) strdup("");
+            data_response->size = 1;
+        }
 
         /* Send response */
         freerdp_channels_send_event(channels, (RDP_EVENT*) data_response);
@@ -178,6 +184,9 @@ void guac_rdp_process_cb_data_response(guac_client* client,
     /* Received clipboard data */
     if (event->data[event->size - 1] == '\0') {
 
+        /* Free existing data */
+        free(((rdp_guac_client_data*) client->data)->clipboard);
+
         /* Store clipboard data */
         ((rdp_guac_client_data*) client->data)->clipboard =
             strdup((char*) event->data);