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Q931: Dissect IEC/ISO cause coding standard as ITU-T 

Add preference to enable dissect IEC/ISO cause coding as ITU-T (Q.850)

Change-Id: Id61f0785b8355f1aed03c4dea70657d661af3f11
Reviewed-on: https://code.wireshark.org/review/7806
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
This commit is contained in:
Mikhail Koreshkov 2015-03-24 22:17:30 +03:00 committed by Alexis La Goutte
parent cc4bce537b
commit 6545d199cc
1 changed files with 8 additions and 1 deletions
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9
epan/dissectors/packet-q931.c
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@ -235,6 +235,7 @@ static reassembly_table q931_reassembly_table;
/* Preferences */
static gboolean q931_reassembly = TRUE;
static gboolean g931_iso_iec_cause = FALSE;
static dissector_table_t codeset_dissector_table;
static dissector_table_t ie_dissector_table;
@ -585,6 +586,7 @@ static const value_string q931_repeat_indication_vals[] = {
* ITU-standardized coding.
*/
#define Q931_ITU_STANDARDIZED_CODING 0x00
#define Q931_ISO_IEC_STANDARDIZED_CODING 0x01
/*
* Dissect a Segmented message information element.
@ -1283,7 +1285,8 @@ dissect_q931_cause_ie_unsafe(tvbuff_t *tvb, int offset, int len,
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
if (coding_standard != Q931_ITU_STANDARDIZED_CODING) {
if (coding_standard != Q931_ITU_STANDARDIZED_CODING &&
!g931_iso_iec_cause && coding_standard != Q931_ISO_IEC_STANDARDIZED_CODING) {
/*
* We don't know how the cause is encoded,
* so just dump it as data and be done with it.
@ -3868,6 +3871,10 @@ proto_register_q931(void)
"Reassemble segmented Q.931 messages",
"Reassemble segmented Q.931 messages (Q.931 - Annex H)",
&q931_reassembly);
prefs_register_bool_preference(q931_module, "iso_iec_cause_coding",
"Decode ISO/IEC cause coding standard as ITU-T",
"Decode ISO/IEC cause coding standard as ITU-T",
&g931_iso_iec_cause);
/* Register for tapping */
q931_tap = register_tap("q931");
}