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, 88 insertions, 0 deletions

diff --git a/epan/tpg.h b/epan/tpg.h
new file mode 100644
index 0000000000..02360ac108
--- /dev/null
+++ b/epan/tpg.h
@@ -0,0 +1,88 @@
+/* tpg.h
+ * Definitions of 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.
+ */
+
+#ifndef _TPG_H_
+#define _TPG_H_
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <epan/proto.h>
+#include <epan/tvbuff.h>
+#include <epan/tvbparse.h>
+#include <epan/emem.h>
+
+
+typedef struct _tpg_stack_frame_t {
+    proto_tree* tree;
+    struct _tpg_stack_frame_t* down;
+} tpg_stack_frame_t;
+
+typedef struct _tpg_parser_data_t {
+    tpg_stack_frame_t* stack;
+    tvbparse_t* tt;
+    void* private_data;
+} tpg_parser_data_t;
+
+extern tpg_parser_data_t* tpg_start(proto_tree* root_tree,
+                                    tvbuff_t* tvb,
+                                    int offset,
+                                    int len,
+                                    void* private_data);
+#define TPG_START(tree,tvb,offset,len,data) tpg_start((tree),(tvb),(offset),(len),(data))
+
+#define TPG_GET(tpg, wanted)  tvbparse_get((tpg)->tt,(wanted))
+#define TPG_FIND(tpg, wanted)  tvbparse_find((tpg)->tt,(wanted))
+
+#define TPG_TREE(vp) (((tpg_parser_data_t*)(vp))->tree)
+#define TPG_DATA(vp,type) (((type*)(((tpg_parser_data_t*)(vp))->private_data)))
+
+#define TPG_STRING(i) tvb_get_ephemeral_string((i)->tvb,(i)->offset,(i)->len)
+#define TPG_INT(i) strtol(tvb_get_ephemeral_string((i)->tvb,(i)->offset,(i)->len),NULL,10)
+#define TPG_UINT(i) strtoul(tvb_get_ephemeral_string((i)->tvb,(i)->offset,(i)->len),NULL,10)
+#define TPG_UINT_HEX(i) strtoul(tvb_get_ephemeral_string((i)->tvb,(i)->offset,(i)->len),NULL,16)
+#define TPG_TVB(i) tvb_new_subset((i)->tvb,(i)->offset,(i)->len,(i)->len)
+
+extern guint32 tpg_ipv4(tvbparse_elem_t*);
+#define TPG_IPV4(i) tpg_ipv4((i))
+
+extern guint8* tpg_ipv6(tvbparse_elem_t*);
+#define TPG_IPV6(i) tpg_ipv6((i))
+
+extern void tpg_push(tpg_parser_data_t*, proto_item*, gint ett);
+#define TPG_PUSH(tpg,pi,ett) tpg_push(((tpg_parser_data_t*)tpg),(pi),(ett))
+
+extern tpg_stack_frame_t* tpg_pop(tpg_parser_data_t* tpg);
+#define TPG_POP(tpg) tpg_pop(((tpg_parser_data_t*)tpg))
+
+#define TPG_ADD_STRING(tpg,  hfid, elem) proto_tree_add_item(((tpg_parser_data_t*)tpg)->stack->tree, hfid, (elem)->tvb, (elem)->offset, (elem)->len, FALSE)
+#define TPG_ADD_INT(tpg,  hfid, elem, value) proto_tree_add_int(((tpg_parser_data_t*)tpg)->stack->tree, hfid, (elem)->tvb, (elem)->offset, (elem)->len, value)
+#define TPG_ADD_UINT(tpg,  hfid, elem, value) proto_tree_add_uint(((tpg_parser_data_t*)tpg)->stack->tree, hfid, (elem)->tvb, (elem)->offset, (elem)->len, value)
+#define TPG_ADD_IPV4(tpg,  hfid, elem, value) proto_tree_add_ipv4(((tpg_parser_data_t*)tpg)->stack->tree, hfid, (elem)->tvb, (elem)->offset, (elem)->len, value)
+#define TPG_ADD_IPV6(tpg,  hfid, elem, value) proto_tree_add_ipv6(((tpg_parser_data_t*)tpg)->stack->tree, hfid, (elem)->tvb, (elem)->offset, (elem)->len, value)
+#define TPG_ADD_TEXT(tpg, elem) proto_tree_add_text(((tpg_parser_data_t*)tpg)->stack->tree, (elem)->tvb, (elem)->offset, (elem)->len, \
+                                                             "%s",tvb_format_text((elem)->tvb, (elem)->offset, (elem)->len))
+
+#endif /* _TPG_H_ */