TPG TVB Parser Generator

Given a bnf-like grammar generate a set of helpers for a dissector

It's not working yet, however I need this checkin as a cheeckpoint

(I'll write the doc when it starts to be ready)


svn path=/trunk/; revision=16021

1 files changed, 89 insertions, 0 deletions

diff --git a/epan/tpg.c b/epan/tpg.c
new file mode 100644
index 0000000000..746419b367
--- /dev/null
+++ b/epan/tpg.c
@@ -0,0 +1,89 @@
+/* tpg.c
+ * helper functions for TPG
+ *
+ *  (c) 2005, Luis E. Garcia Ontanon <luis.ontanon@gmail.com>
+ * 
+ * $Id:$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "tpg.h"
+#include <epan/emem.h>
+#include <epan/packet.h>
+
+void
+http_dissector_add(guint32 port, dissector_handle_t handle)
+{
+}
+
+
+extern guint32 tpg_ipv4(tvbparse_elem_t* e _U_) {    
+    /* XXX TO DO */
+    return 0;
+}
+
+extern guint8* tpg_ipv6(tvbparse_elem_t* e _U_) {
+    /* XXX TO DO */
+    return NULL;
+}
+
+extern tpg_parser_data_t* tpg_start(proto_tree* root_tree,
+                                    tvbuff_t* tvb,
+                                    int offset,
+                                    int len,
+                                    void* private_data) {
+    tpg_parser_data_t* tpg = ep_alloc(sizeof(tpg_parser_data_t));
+    tpg->private_data = private_data;
+    tpg->tt = tvbparse_init(tvb,offset,len,tpg,NULL);
+
+    tpg->stack = ep_alloc(sizeof(tpg_stack_frame_t));
+    tpg->stack->tree = root_tree;
+    tpg->stack->down = NULL;
+    
+    return tpg;
+}
+
+
+extern void tpg_push(tpg_parser_data_t* tpg, proto_item* item, gint ett) {
+    tpg_stack_frame_t* frame = ep_alloc(sizeof(tpg_stack_frame_t));
+    
+    frame->tree = proto_item_add_subtree(item,ett);
+    frame->down = tpg->stack;
+    tpg->stack = frame;
+    
+}
+
+
+tpg_stack_frame_t* tpg_pop(tpg_parser_data_t* tpg) {
+    tpg_stack_frame_t* frame = tpg->stack;
+    
+    if (tpg->stack->down) {
+        tpg->stack = tpg->stack->down;
+    } else {
+        DISSECTOR_ASSERT( FALSE && "Error in the TPG infrastructure: trying to pop the end of the stack");
+    }
+    
+    return frame;
+}