diff options
Diffstat (limited to 'epan/proto.h')
| -rw-r--r-- | epan/proto.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/epan/proto.h b/epan/proto.h index db01f62935..30564b23da 100644 --- a/epan/proto.h +++ b/epan/proto.h @@ -154,6 +154,12 @@ struct _header_field_info { /* ------- set by proto routines (prefilled by HFILL macro, see below) ------ */ int id; /**< Field ID */ int parent; /**< parent protocol tree */ + /* This field keeps track of whether a field is + * referenced in any filter or not and if so how + * many times. If a filter is being referenced the + * refcount for the parent protocol is updated as well + */ + int ref_count; /**< is this field referenced by a filter or not */ int bitshift; /**< bits to shift (FT_BOOLEAN only) */ header_field_info *same_name_next; /**< Link to next hfinfo with same abbrev*/ header_field_info *same_name_prev; /**< Link to previous hfinfo with same abbrev*/ @@ -164,7 +170,7 @@ struct _header_field_info { * _header_field_info. If new fields are added or removed, it should * be changed as necessary. */ -#define HFILL 0, 0, 0, NULL, NULL +#define HFILL 0, 0, 0, 0, NULL, NULL /** Used when registering many fields at once, using proto_register_field_array() */ typedef struct hf_register_info { @@ -265,6 +271,21 @@ extern void proto_init(const char *plugin_dir, /** Frees memory used by proto routines. Called at program shutdown */ extern void proto_cleanup(void); +/** This function takes a tree and a protocol id as parameter and + will return TRUE/FALSE for whether the protocol or any of the filterable + fields in the protocol is referenced by any fitlers. + If this function returns FALSE then it is safe to skip any + proto_tree_add_...() calls and just treat the call as if the + dissector was called with tree==NULL. + If you reset the tree to NULL by this dissector returning FALSE, + you will still need to call any subdissector with the original value of + tree or filtering will break. + + The purpose of this is to optimize ethereal for speed and make it + faster for when filters are being used. +*/ +extern gboolean proto_field_is_referenced(proto_tree *tree, int proto_id); + /** Create a subtree under an existing item. |