Added a private hash table to transport string values between dissectors.

This works between C and Lua.

In C the pinfo.private_table pointer must be initialized using
g_hash_table_new (g_str_hash, g_str_equal);

In Lua the values are available using pinfo.private.<key>, and the
table is created automatically on first usage.  It's possible to use
this datatypes: nil, boolean, number and string, but every value
is converted to string so numbers must be converted using tonumber()
on usage.  Boolean is either nil or an empty string.

svn path=/trunk/; revision=39461

1 files changed, 8 insertions, 0 deletions

diff --git a/epan/wslua/wslua.h b/epan/wslua/wslua.h
index a7a6447354..ffa2a84c37 100644
--- a/epan/wslua/wslua.h
+++ b/epan/wslua/wslua.h
@@ -165,6 +165,12 @@ struct _wslua_cols {
     gboolean expired;
 };
 
+struct _wslua_private_table {
+    GHashTable *table;
+    gboolean is_allocated;
+    gboolean expired;
+};
+
 struct _wslua_treeitem {
     proto_item* item;
     proto_tree* tree;
@@ -237,6 +243,7 @@ typedef tvbparse_elem_t* Node;
 typedef tvbparse_action_t* Shortcut;
 typedef struct _wslua_main* WireShark;
 typedef struct _wslua_dir* Dir;
+typedef struct _wslua_private_table* PrivateTable;
 
 /*
  * toXxx(L,idx) gets a Xxx from an index (Lua Error if fails)
@@ -397,6 +404,7 @@ extern Pinfo* push_Pinfo(lua_State* L, packet_info* p);
 extern void clear_outstanding_Pinfo(void);
 extern void clear_outstanding_Column(void);
 extern void clear_outstanding_Columns(void);
+extern void clear_outstanding_PrivateTable(void);
 
 extern TreeItem* push_TreeItem(lua_State* L, TreeItem ti);
 extern void clear_outstanding_TreeItem(void);