Hello,
I have a question regarding to register a boolean field, especially about the FIELDBASE value.
In README.developer it says the general rules:
static hf_register_info hf[] = {
{ &hf_PROTOABBREV_FIELDABBREV,
{ "FIELDNAME", "PROTOABBREV.FIELDABBREV",
FIELDTYPE, FIELDBASE, FIELDCONVERT, BITMASK,
"FIELDDESCR", HFILL }
}
};
FIELDBASE BASE_NONE, BASE_DEC, BASE_HEX, BASE_OCT, BASE_DEC_HEX,
BASE_HEX_DEC, or BASE_CUSTOM, possibly ORed with
BASE_RANGE_STRING
In proto.h the FIELDBASE declared as enum:
typedef enum {
BASE_NONE, /**< none */
BASE_DEC, /**< decimal */
BASE_HEX, /**< hexadecimal */
BASE_OCT, /**< octal */
BASE_DEC_HEX, /**< decimal (hexadecimal) */
BASE_HEX_DEC, /**< hexadecimal (decimal) */
BASE_CUSTOM /**< call custom routine (in ->strings) to format */
} base_display_e;
But checking some examples of packet-gtp.c:
{&hf_gtp_flags_e,
{"Is Next Extension Header present?", "gtp.flags.e", FT_BOOLEAN, 8, TFS(&yes_no_tfs), GTP_E_MASK,
"Is Next Extension Header present? (1 = yes, 0 = no)", HFILL}},
{&hf_gtp_ms_valid, {"MS validated", "gtp.ms_valid", FT_BOOLEAN, BASE_NONE, NULL, 0, "MS validated", HFILL}},
{&hf_gtp_cmn_flg_ppc,
{"Prohibit Payload Compression", "gtp.cmn_flg.ppc",
FT_BOOLEAN, 8, NULL, 0x01,
"Prohibit Payload Compression", HFILL}},
It is not clear.
As FIELDBASE it uses BASE_NONE or 8.
Why?
What is 8?
Do I have to use BASE_NONE in case of no value string table (NULL) and 0 (default) mask?
Do I have to use 8 if I have a value string table and or a non-zero mask?
Can sombeody explain this to me please?
Regards,
TAMAS REGOS
