forked from osmocom/wireshark
2190 lines
65 KiB
C
2190 lines
65 KiB
C
/* packet-q2931.c
|
|
* Routines for Q.2931 frame disassembly
|
|
* Guy Harris <guy@alum.mit.edu>
|
|
*
|
|
* $Id: packet-q2931.c,v 1.31 2003/07/08 07:55:10 guy Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1998
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <glib.h>
|
|
#include <string.h>
|
|
#include <epan/packet.h>
|
|
#include "oui.h"
|
|
#include "nlpid.h"
|
|
#include "etypes.h"
|
|
#include "packet-q931.h"
|
|
#include "packet-arp.h"
|
|
|
|
/*
|
|
* See
|
|
*
|
|
* http://www.protocols.com/pbook/atmsig.htm
|
|
*
|
|
* for some information on Q.2931, although, alas, not the actual message
|
|
* type and information element values - those I got from the FreeBSD 3.2
|
|
* ATM code, and from Q.2931 (and Q.931) itself.
|
|
*/
|
|
|
|
static int proto_q2931 = -1;
|
|
static int hf_q2931_discriminator = -1;
|
|
static int hf_q2931_call_ref_len = -1;
|
|
static int hf_q2931_call_ref_flag = -1;
|
|
static int hf_q2931_call_ref = -1;
|
|
static int hf_q2931_message_type = -1;
|
|
static int hf_q2931_message_type_ext = -1;
|
|
static int hf_q2931_message_flag = -1;
|
|
static int hf_q2931_message_action_indicator = -1;
|
|
static int hf_q2931_message_len = -1;
|
|
|
|
static gint ett_q2931 = -1;
|
|
static gint ett_q2931_ext = -1;
|
|
static gint ett_q2931_ie = -1;
|
|
static gint ett_q2931_ie_ext = -1;
|
|
static gint ett_q2931_nsap = -1;
|
|
|
|
static void dissect_q2931_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, guint8 info_element, guint8 info_element_ext);
|
|
|
|
/*
|
|
* Q.2931 message types.
|
|
*/
|
|
#define Q2931_ALERTING 0x01
|
|
#define Q2931_CALL_PROCEEDING 0x02
|
|
#define Q2931_CONNECT 0x07
|
|
#define Q2931_CONNECT_ACK 0x0F
|
|
#define Q2931_PROGRESS 0x03
|
|
#define Q2931_SETUP 0x05
|
|
#define Q2931_SETUP_ACK 0x0B
|
|
#define Q2931_RELEASE 0x4D
|
|
#define Q2931_RELEASE_COMPLETE 0x5A
|
|
#define Q2931_RESTART 0x46
|
|
#define Q2931_RESTART_ACK 0x4E
|
|
#define Q2931_INFORMATION 0x7B
|
|
#define Q2931_NOTIFY 0x6E
|
|
#define Q2931_STATUS 0x7D
|
|
#define Q2931_STATUS_ENQUIRY 0x75
|
|
#define Q2931_ADD_PARTY 0x80
|
|
#define Q2931_ADD_PARTY_ACK 0x81
|
|
#define Q2931_ADD_PARTY_REJ 0x82
|
|
#define Q2931_DROP_PARTY 0x83
|
|
#define Q2931_DROP_PARTY_ACK 0x84
|
|
#define Q2931_LEAF_SETUP_FAIL 0x90
|
|
#define Q2931_LEAF_SETUP_REQ 0x91
|
|
|
|
static const value_string q2931_message_type_vals[] = {
|
|
{ Q2931_ALERTING, "ALERTING" },
|
|
{ Q2931_CALL_PROCEEDING, "CALL PROCEEDING" },
|
|
{ Q2931_CONNECT, "CONNECT" },
|
|
{ Q2931_CONNECT_ACK, "CONNECT ACKNOWLEDGE" },
|
|
{ Q2931_PROGRESS, "PROGRESS" },
|
|
{ Q2931_SETUP, "SETUP" },
|
|
{ Q2931_SETUP_ACK, "SETUP ACKNOWLEDGE" },
|
|
{ Q2931_RELEASE, "RELEASE" },
|
|
{ Q2931_RELEASE_COMPLETE, "RELEASE COMPLETE" },
|
|
{ Q2931_RESTART, "RESTART" },
|
|
{ Q2931_RESTART_ACK, "RESTART ACKNOWLEDGE" },
|
|
{ Q2931_INFORMATION, "INFORMATION" },
|
|
{ Q2931_NOTIFY, "NOTIFY" },
|
|
{ Q2931_STATUS, "STATUS" },
|
|
{ Q2931_STATUS_ENQUIRY, "STATUS ENQUIRY" },
|
|
{ Q2931_ADD_PARTY, "ADD PARTY" },
|
|
{ Q2931_ADD_PARTY_ACK, "ADD PARTY ACKNOWLEDGE" },
|
|
{ Q2931_ADD_PARTY_REJ, "ADD PARTY REJECT" },
|
|
{ Q2931_DROP_PARTY, "DROP PARTY" },
|
|
{ Q2931_DROP_PARTY_ACK, "DROP PARTY ACKNOWLEDGE" },
|
|
{ Q2931_LEAF_SETUP_FAIL, "LEAF SETUP FAILURE" },
|
|
{ Q2931_LEAF_SETUP_REQ, "LEAF SETUP REQUEST" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const true_false_string tfs_call_ref_flag = {
|
|
"Message sent to originating side",
|
|
"Message sent from originating side"
|
|
};
|
|
|
|
/*
|
|
* Bits in the message type extension.
|
|
*/
|
|
#define Q2931_MSG_TYPE_EXT_FOLLOW_INST 0x10 /* follow instructions in action indicator */
|
|
#define Q2931_MSG_TYPE_EXT_ACTION_IND 0x03 /* said instructions */
|
|
|
|
static const true_false_string tos_msg_flag = {
|
|
"Regular error handling procedures apply",
|
|
"Follow explicit error handling instructions"
|
|
};
|
|
|
|
static const value_string msg_action_ind_vals[] = {
|
|
{ 0x00, "Clear call" },
|
|
{ 0x01, "Discard and ignore" },
|
|
{ 0x02, "Discard and report status" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
/*
|
|
* Bits in the compatibility instruction indicator octet of an
|
|
* information element.
|
|
*/
|
|
#define Q2931_IE_COMPAT_CODING_STD 0x60 /* Coding standard */
|
|
#define Q2931_IE_COMPAT_FOLLOW_INST 0x10 /* follow instructions in action indicator */
|
|
#define Q2931_IE_COMPAT_ACTION_IND 0x07
|
|
|
|
/*
|
|
* ITU-standardized coding.
|
|
*/
|
|
#define Q2931_ITU_STANDARDIZED_CODING 0x00
|
|
|
|
static const value_string coding_std_vals[] = {
|
|
{ 0x00, "ITU-T standardized coding" },
|
|
{ 0x20, "ISO/IEC standard" },
|
|
{ 0x40, "National standard" },
|
|
{ 0x60, "Standard defined for the network" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string ie_action_ind_vals[] = {
|
|
{ 0x00, "Clear call" },
|
|
{ 0x01, "Discard information element and proceed" },
|
|
{ 0x02, "Discard information element, proceed, and report status" },
|
|
{ 0x05, "Discard message, and ignore" },
|
|
{ 0x06, "Discard message, and report status" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
/*
|
|
* Information elements.
|
|
*/
|
|
#define Q2931_IE_EXTENSION 0x80 /* Extension flag */
|
|
|
|
#define Q2931_IE_NBAND_BEARER_CAP 0x04 /* Narrowband bearer capability */
|
|
#define Q2931_IE_CAUSE 0x08
|
|
#define Q2931_IE_CALL_STATE 0x14
|
|
#define Q2931_IE_PROGRESS_INDICATOR 0x1E
|
|
#define Q2931_IE_NOTIFICATION_INDICATOR 0x27
|
|
#define Q2931_IE_E2E_TRANSIT_DELAY 0x42 /* End-to-end Transit Delay */
|
|
#define Q2931_IE_ENDPOINT_REFERENCE 0x54
|
|
#define Q2931_IE_ENDPOINT_STATE 0x55
|
|
#define Q2931_IE_AAL_PARAMETERS 0x58 /* ATM adaptation layer parameters */
|
|
#define Q2931_IE_ATM_USER_CELL_RATE 0x59 /* ATM traffic descriptor */
|
|
#define Q2931_IE_CONNECTION_IDENTIFIER 0x5A
|
|
#define Q2931_IE_OAM_TRAFFIC_DESCRIPTOR 0x5B
|
|
#define Q2931_IE_QOS_PARAMETER 0x5C /* Quality of Service parameter */
|
|
#define Q2931_IE_BBAND_HI_LAYER_INFO 0x5D /* Broadband high-layer information */
|
|
#define Q2931_IE_BBAND_BEARER_CAP 0x5E /* Broadband bearer capability */
|
|
#define Q2931_IE_BBAND_LOW_LAYER_INFO 0x5F /* Broadband low-layer information */
|
|
#define Q2931_IE_BBAND_LOCKING_SHIFT 0x60 /* Broadband locking shift */
|
|
#define Q2931_IE_BBAND_NLOCKING_SHIFT 0x61 /* Broadband non-locking shift */
|
|
#define Q2931_IE_BBAND_SENDING_COMPL 0x62 /* Broadband sending complete */
|
|
#define Q2931_IE_BBAND_RPT_INDICATOR 0x63 /* Broadband repeat indicator */
|
|
#define Q2931_IE_CALLING_PARTY_NUMBER 0x6C /* Calling Party Number */
|
|
#define Q2931_IE_CALLING_PARTY_SUBADDR 0x6D /* Calling Party Subaddress */
|
|
#define Q2931_IE_CALLED_PARTY_NUMBER 0x70 /* Called Party Number */
|
|
#define Q2931_IE_CALLED_PARTY_SUBADDR 0x71 /* Called Party Subaddress */
|
|
#define Q2931_IE_TRANSIT_NETWORK_SEL 0x78 /* Transit Network Selection */
|
|
#define Q2931_IE_RESTART_INDICATOR 0x79
|
|
#define Q2931_IE_NBAND_LOW_LAYER_COMPAT 0x7C /* Narrowband Low-Layer Compatibility */
|
|
#define Q2931_IE_NBAND_HIGH_LAYER_COMPAT 0x7D /* Narrowband High-Layer Compatibility */
|
|
#define Q2931_IE_GENERIC_IDENT_TRANSPORT 0x7F /* Generic identifier transport */
|
|
|
|
static const value_string q2931_info_element_vals[] = {
|
|
{ Q2931_IE_NBAND_BEARER_CAP, "Narrowband bearer capability" },
|
|
{ Q2931_IE_CAUSE, "Cause" },
|
|
{ Q2931_IE_CALL_STATE, "Call state" },
|
|
{ Q2931_IE_PROGRESS_INDICATOR, "Progress indicator" },
|
|
{ Q2931_IE_NOTIFICATION_INDICATOR, "Notification indicator" },
|
|
{ Q2931_IE_E2E_TRANSIT_DELAY, "End-to-end transit delay" },
|
|
{ Q2931_IE_ENDPOINT_REFERENCE, "Endpoint reference" },
|
|
{ Q2931_IE_ENDPOINT_STATE, "Endpoint state" },
|
|
{ Q2931_IE_AAL_PARAMETERS, "AAL parameters" },
|
|
{ Q2931_IE_ATM_USER_CELL_RATE, "ATM user cell rate" },
|
|
{ Q2931_IE_CONNECTION_IDENTIFIER, "Connection identifier" },
|
|
{ Q2931_IE_OAM_TRAFFIC_DESCRIPTOR, "OAM traffic descriptor" },
|
|
{ Q2931_IE_QOS_PARAMETER, "Quality of service parameter" },
|
|
{ Q2931_IE_BBAND_HI_LAYER_INFO, "Broadband high-layer information" },
|
|
{ Q2931_IE_BBAND_BEARER_CAP, "Broadband bearer capability" },
|
|
{ Q2931_IE_BBAND_LOW_LAYER_INFO, "Broadband low-layer information" },
|
|
{ Q2931_IE_BBAND_LOCKING_SHIFT, "Broadband locking shift" },
|
|
{ Q2931_IE_BBAND_NLOCKING_SHIFT, "Broadband non-locking shift" },
|
|
{ Q2931_IE_BBAND_SENDING_COMPL, "Broadband sending complete" },
|
|
{ Q2931_IE_BBAND_RPT_INDICATOR, "Broadband repeat indicator" },
|
|
{ Q2931_IE_CALLING_PARTY_NUMBER, "Calling party number" },
|
|
{ Q2931_IE_CALLING_PARTY_SUBADDR, "Calling party subaddress" },
|
|
{ Q2931_IE_CALLED_PARTY_NUMBER, "Called party number" },
|
|
{ Q2931_IE_CALLED_PARTY_SUBADDR, "Called party subaddress" },
|
|
{ Q2931_IE_TRANSIT_NETWORK_SEL, "Transit network selection" },
|
|
{ Q2931_IE_RESTART_INDICATOR, "Restart indicator" },
|
|
{ Q2931_IE_NBAND_LOW_LAYER_COMPAT, "Narrowband low-layer compatibility" },
|
|
{ Q2931_IE_NBAND_HIGH_LAYER_COMPAT, "Narrowband high-layer compatibility" },
|
|
{ Q2931_IE_GENERIC_IDENT_TRANSPORT, "Generic identifier transport" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* Dissect a locking or non-locking shift information element.
|
|
*/
|
|
static const value_string q2931_codeset_vals[] = {
|
|
{ 0x00, "Q.2931 information elements" },
|
|
{ 0x04, "Information elements for ISO/IEC use" },
|
|
{ 0x05, "Information elements for national use" },
|
|
{ 0x06, "Information elements specific to the local network" },
|
|
{ 0x07, "User-specific information elements" },
|
|
{ 0x00, NULL },
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_shift_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, guint8 info_element)
|
|
{
|
|
gboolean non_locking_shift;
|
|
guint8 codeset;
|
|
|
|
if (len == 0)
|
|
return;
|
|
non_locking_shift = (info_element == Q2931_IE_BBAND_NLOCKING_SHIFT);
|
|
codeset = tvb_get_guint8(tvb, offset) & 0x07;
|
|
proto_tree_add_text(tree, tvb, offset, 1, "%s shift to codeset %u: %s",
|
|
(non_locking_shift ? "Non-locking" : "Locking"),
|
|
codeset,
|
|
val_to_str(codeset, q2931_codeset_vals, "Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect an ATM adaptation layer parameters information element.
|
|
*/
|
|
#define Q2931_AAL_VOICE 0x00
|
|
#define Q2931_AAL1 0x01
|
|
#define Q2931_AAL2 0x02
|
|
#define Q2931_AAL3_4 0x03
|
|
#define Q2931_AAL5 0x05
|
|
#define Q2931_USER_DEFINED_AAL 0x10
|
|
|
|
static const value_string q9231_aal_type_vals[] = {
|
|
{ 0x00, "AAL for voice" },
|
|
{ 0x01, "AAL type 1" },
|
|
{ 0x02, "AAL type 2" },
|
|
{ 0x03, "AAL type 3/4" },
|
|
{ 0x05, "AAL type 5" },
|
|
{ 0x10, "User-defined AAL" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q9231_aal1_subtype_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "64 kbit/s voice-band signal transport (G.711/G.722)" },
|
|
{ 0x02, "Circuit transport (I.363)" },
|
|
{ 0x03, "Circuit emulation (asynchronous)" },
|
|
{ 0x04, "High-quality audio signal transport (I.363)" },
|
|
{ 0x05, "Video signal transport (I.363)" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
#define Q2931_AAL1_nx64_KBIT_S 0x40
|
|
#define Q2931_AAL1_nx8_KBIT_S 0x41
|
|
|
|
static const value_string q9231_aal1_cbr_rate_vals[] = {
|
|
{ 0x01, "64 kbit/s" },
|
|
{ 0x04, "1544 kbit/s" },
|
|
{ 0x05, "6312 kbit/s" },
|
|
{ 0x06, "32064 kbit/s" },
|
|
{ 0x07, "44736 kbit/s" },
|
|
{ 0x08, "97728 kbit/s" },
|
|
{ 0x10, "2048 kbit/s" },
|
|
{ 0x11, "8448 kibt/s" },
|
|
{ 0x12, "34368 kbit/s" },
|
|
{ 0x13, "139264 kbit/s" },
|
|
{ Q2931_AAL1_nx64_KBIT_S, "nx64 kbit/s" },
|
|
{ Q2931_AAL1_nx8_KBIT_S, "nx8 kbit/s" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_aal1_src_clk_rec_meth_vals[] = {
|
|
{ 0x00, "Null (synchronous circuit transport)" },
|
|
{ 0x01, "SRTS method (asynchronous circuit transport" },
|
|
{ 0x02, "Adaptive clock method" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_aal1_err_correction_method_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "FEC method for less sensitive signal transport" },
|
|
{ 0x02, "FEC method for delay-sensitive signal transport" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_aal_mode_vals[] = {
|
|
{ 0x01, "Message" },
|
|
{ 0x02, "Streaming" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_sscs_type_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "Data SSCS based on SSCOP (assured operation)" },
|
|
{ 0x02, "Data SSCS based on SSCOP (non-assured operation)" },
|
|
{ 0x04, "Frame relay SSCS" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_aal_parameters_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 aal_type;
|
|
guint8 identifier;
|
|
guint32 value;
|
|
guint32 low_mid, high_mid;
|
|
|
|
if (len == 0)
|
|
return;
|
|
aal_type = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1, "AAL type: %s",
|
|
val_to_str(aal_type, q9231_aal_type_vals, "Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
/*
|
|
* Now get the rest of the IE.
|
|
*/
|
|
if (aal_type == 0x40) {
|
|
/*
|
|
* User-defined AAL.
|
|
*/
|
|
if (len > 4)
|
|
len = 4;
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"User defined AAL information: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
return;
|
|
}
|
|
|
|
while (len != 0) {
|
|
identifier = tvb_get_guint8(tvb, offset);
|
|
switch (identifier) {
|
|
|
|
case 0x85: /* Subtype identifier for AAL1 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Subtype: %s",
|
|
val_to_str(value, q9231_aal1_subtype_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x86: /* CBR identifier for AAL1 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"CBR rate: %s",
|
|
val_to_str(value, q9231_aal1_cbr_rate_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x87: /* Multiplier identifier for AAL1 */
|
|
if (len < 3)
|
|
return;
|
|
value = tvb_get_ntohs(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Multiplier: %u", value);
|
|
offset += 3;
|
|
len -= 3;
|
|
break;
|
|
|
|
case 0x88: /* Source clock frequency recovery method identifier for AAL1 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Source clock frequency recovery method: %s",
|
|
val_to_str(value, q2931_aal1_src_clk_rec_meth_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x89: /* Error correction method identifier for AAL1 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Error correction method: %s",
|
|
val_to_str(value, q2931_aal1_err_correction_method_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x8A: /* Structured data transfer block size identifier for AAL1 */
|
|
if (len < 3)
|
|
return;
|
|
value = tvb_get_ntohs(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Structured data transfer block size: %u", value);
|
|
offset += 3;
|
|
len -= 3;
|
|
break;
|
|
|
|
case 0x8B: /* Partially filled cells identifier for AAL1 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Partially filled cells method: %u octets", value);
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x8C: /* Forward maximum CPCS-SDU size identifier for AAL3/4 and AAL5 */
|
|
if (len < 3)
|
|
return;
|
|
value = tvb_get_ntohs(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Forward maximum CPCS-SDU size: %u", value);
|
|
offset += 3;
|
|
len -= 3;
|
|
break;
|
|
|
|
case 0x81: /* Backward maximum CPCS-SDU size identifier for AAL3/4 and AAL5 */
|
|
if (len < 3)
|
|
return;
|
|
value = tvb_get_ntohs(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Backward maximum CPCS-SDU size: %u", value);
|
|
offset += 3;
|
|
len -= 3;
|
|
break;
|
|
|
|
case 0x82: /* MID range identifier for AAL3/4 */
|
|
if (len < 5)
|
|
return;
|
|
low_mid = tvb_get_ntohs(tvb, offset + 1);
|
|
high_mid = tvb_get_ntohs(tvb, offset + 3);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"MID range: %u - %u", low_mid, high_mid);
|
|
offset += 5;
|
|
len -= 5;
|
|
break;
|
|
|
|
case 0x83: /* Mode identifier for AAL3/4 and AAL5 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Mode: %s",
|
|
val_to_str(value, q2931_aal_mode_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
case 0x84: /* SSCS type identifier for AAL3/4 and AAL5 */
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"SSCS type: %s",
|
|
val_to_str(value, q2931_sscs_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
default: /* unknown AAL parameter */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Unknown AAL parameter (0x%02X)",
|
|
identifier);
|
|
return; /* give up */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect an ATM traffic descriptor information element.
|
|
*/
|
|
#define Q2931_ATM_CR_FW_PEAK_CLP_0 0x82 /* Forward peak cell rate (CLP = 0) */
|
|
#define Q2931_ATM_CR_BW_PEAK_CLP_0 0x83 /* Backward peak cell rate (CLP = 0) */
|
|
#define Q2931_ATM_CR_FW_PEAK_CLP_0_1 0x84 /* Forward peak cell rate (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_BW_PEAK_CLP_0_1 0x85 /* Backward peak cell rate (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_FW_SUST_CLP_0 0x88 /* Forward sustainable cell rate (CLP = 0) */
|
|
#define Q2931_ATM_CR_BW_SUST_CLP_0 0x89 /* Backward sustainable cell rate (CLP = 0) */
|
|
#define Q2931_ATM_CR_FW_SUST_CLP_0_1 0x90 /* Forward sustainable cell rate (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_BW_SUST_CLP_0_1 0x91 /* Backward sustainable cell rate (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_FW_MAXB_CLP_0 0xA0 /* Forward maximum burst size (CLP = 0) */
|
|
#define Q2931_ATM_CR_BW_MAXB_CLP_0 0xA1 /* Backward maximum burst size (CLP = 0) */
|
|
#define Q2931_ATM_CR_FW_MAXB_CLP_0_1 0xB0 /* Forward maximum burst size (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_BW_MAXB_CLP_0_1 0xB1 /* Backward maximum burst size (CLP = 0 + 1) */
|
|
#define Q2931_ATM_CR_BEST_EFFORT_IND 0xBE /* Best effort indicator */
|
|
#define Q2931_ATM_CR_TRAFFIC_MGMT_OPT 0xBF /* Traffic management options */
|
|
|
|
static const value_string q2931_atm_td_subfield_vals[] = {
|
|
{ Q2931_ATM_CR_FW_PEAK_CLP_0, "Forward peak cell rate (CLP = 0)" },
|
|
{ Q2931_ATM_CR_BW_PEAK_CLP_0, "Backward peak cell rate (CLP = 0)" },
|
|
{ Q2931_ATM_CR_FW_PEAK_CLP_0_1, "Forward peak cell rate (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_BW_PEAK_CLP_0_1, "Backward peak cell rate (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_FW_SUST_CLP_0, "Forward sustainable cell rate (CLP = 0)" },
|
|
{ Q2931_ATM_CR_BW_SUST_CLP_0, "Backward sustainable cell rate (CLP = 0)" },
|
|
{ Q2931_ATM_CR_FW_SUST_CLP_0_1, "Forward sustainable cell rate (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_BW_SUST_CLP_0_1, "Backward sustainable cell rate (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_FW_MAXB_CLP_0, "Forward maximum burst size (CLP = 0)" },
|
|
{ Q2931_ATM_CR_BW_MAXB_CLP_0, "Backward maximum burst size (CLP = 0)" },
|
|
{ Q2931_ATM_CR_FW_MAXB_CLP_0_1, "Forward maximum burst size (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_BW_MAXB_CLP_0_1, "Backward maximum burst size (CLP = 0 + 1)" },
|
|
{ Q2931_ATM_CR_BEST_EFFORT_IND, "Best effort indicator" },
|
|
{ Q2931_ATM_CR_TRAFFIC_MGMT_OPT,"Traffic management options" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_atm_cell_rate_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 identifier;
|
|
guint32 value;
|
|
|
|
while (len != 0) {
|
|
identifier = tvb_get_guint8(tvb, offset);
|
|
switch (identifier) {
|
|
|
|
case Q2931_ATM_CR_FW_PEAK_CLP_0:
|
|
case Q2931_ATM_CR_BW_PEAK_CLP_0:
|
|
case Q2931_ATM_CR_FW_PEAK_CLP_0_1:
|
|
case Q2931_ATM_CR_BW_PEAK_CLP_0_1:
|
|
case Q2931_ATM_CR_FW_SUST_CLP_0:
|
|
case Q2931_ATM_CR_BW_SUST_CLP_0:
|
|
case Q2931_ATM_CR_FW_SUST_CLP_0_1:
|
|
case Q2931_ATM_CR_BW_SUST_CLP_0_1:
|
|
case Q2931_ATM_CR_FW_MAXB_CLP_0:
|
|
case Q2931_ATM_CR_BW_MAXB_CLP_0:
|
|
case Q2931_ATM_CR_FW_MAXB_CLP_0_1:
|
|
case Q2931_ATM_CR_BW_MAXB_CLP_0_1:
|
|
if (len < 4)
|
|
return;
|
|
value = tvb_get_ntoh24(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"%s: %u cell%s/s",
|
|
val_to_str(identifier, q2931_atm_td_subfield_vals,
|
|
NULL),
|
|
value, plurality(value, "", "s"));
|
|
offset += 4;
|
|
len -= 4;
|
|
break;
|
|
|
|
case Q2931_ATM_CR_BEST_EFFORT_IND:
|
|
/* Yes, its value *IS* 0xBE.... */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s",
|
|
val_to_str(identifier, q2931_atm_td_subfield_vals,
|
|
NULL));
|
|
offset += 1;
|
|
len -= 1;
|
|
break;
|
|
|
|
case Q2931_ATM_CR_TRAFFIC_MGMT_OPT:
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_guint8(tvb, offset + 1);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"%s",
|
|
val_to_str(identifier, q2931_atm_td_subfield_vals,
|
|
NULL));
|
|
proto_tree_add_text(tree, tvb, offset + 1, 1,
|
|
"%s allowed in forward direction",
|
|
(value & 0x80) ? "Frame discard" : "No frame discard");
|
|
proto_tree_add_text(tree, tvb, offset + 1, 1,
|
|
"%s allowed in backward direction",
|
|
(value & 0x40) ? "Frame discard" : "No frame discard");
|
|
proto_tree_add_text(tree, tvb, offset + 1, 1,
|
|
"Tagging %srequested in backward direction",
|
|
(value & 0x02) ? "" : "not ");
|
|
proto_tree_add_text(tree, tvb, offset + 1, 1,
|
|
"Tagging %srequested in forward direction",
|
|
(value & 0x01) ? "" : "not ");
|
|
offset += 2;
|
|
len -= 2;
|
|
break;
|
|
|
|
default: /* unknown ATM traffic descriptor element */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Unknown ATM traffic descriptor element (0x%02X)",
|
|
identifier);
|
|
return; /* give up */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a broadband bearer capability information element.
|
|
*/
|
|
static const value_string q2931_bearer_class_vals[] = {
|
|
{ 0x01, "BCOB-A" },
|
|
{ 0x03, "BCOB-C" },
|
|
{ 0x10, "BCOB-X" },
|
|
{ 0x18, "Transparent VP Service" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_transfer_capability_vals[] = {
|
|
{ 0x00, "No bit rate indication" },
|
|
{ 0x01, "No bit rate indication, end-to-end timing required" },
|
|
{ 0x02, "No bit rate indication, end-to-end timing not required" },
|
|
{ 0x04, "CBR" },
|
|
{ 0x05, "CBR, end-to-end timing required" },
|
|
{ 0x06, "CBR, end-to-end timing not required" },
|
|
{ 0x07, "CBR with CLR commitment on CLP=0+1" },
|
|
{ 0x08, "VBR, no timing requirements indication" },
|
|
{ 0x09, "Real time VBR" },
|
|
{ 0x0A, "Non-real time VBR" },
|
|
{ 0x0B, "Non-real time VBR with CLR commitment on CLP=0+1" },
|
|
{ 0x0C, "ABR" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_susc_clip_vals[] = {
|
|
{ 0x00, "Not susceptible to clipping" },
|
|
{ 0x20, "Susceptible to clipping" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_up_conn_config_vals[] = {
|
|
{ 0x00, "Point-to-point" },
|
|
{ 0x01, "Point-to-multipoint" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_bband_bearer_cap_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Bearer class: %s",
|
|
val_to_str(octet & 0x1F, q2931_bearer_class_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
if (!(octet & Q2931_IE_EXTENSION)) {
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"ATM Transfer Capability: %s",
|
|
val_to_str(octet & 0x1F, q2931_transfer_capability_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Susceptibility to clipping: %s",
|
|
val_to_str(octet & 0x60, q2931_susc_clip_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User-plane connection configuration: %s",
|
|
val_to_str(octet & 0x03, q2931_up_conn_config_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect a broadband high layer information information element.
|
|
*/
|
|
static const value_string q2931_hi_layer_info_type_vals[] = {
|
|
{ 0x00, "ISO/IEC" },
|
|
{ 0x01, "User-specific" },
|
|
{ 0x03, "Vendor-specific" },
|
|
{ 0x04, "ITU-T SG 1 B-ISDN teleservice recommendation" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_bband_hi_layer_info_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"High layer information type: %s",
|
|
val_to_str(octet & 0x7F, q2931_hi_layer_info_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
/*
|
|
* Dissect a Bearer capability or Low-layer compatibility information element.
|
|
*/
|
|
#define Q2931_UIL2_USER_SPEC 0x10
|
|
|
|
static const value_string q2931_uil2_vals[] = {
|
|
{ 0x01, "Basic mode ISO 1745" },
|
|
{ 0x02, "Q.921/I.441" }, /* LAPD */
|
|
{ 0x06, "X.25, link layer" }, /* LAPB */
|
|
{ 0x07, "X.25 multilink" }, /* or 0x0F? */
|
|
{ 0x08, "T.71 Extended LAPB" },
|
|
{ 0x09, "HDLC ARM" },
|
|
{ 0x0A, "HDLC NRM" },
|
|
{ 0x0B, "HDLC ABM" },
|
|
{ 0x0C, "ISO 8802/2 LLC" },
|
|
{ 0x0D, "X.75 Single Link Procedure" },
|
|
{ 0x0E, "Q.922" },
|
|
{ Q2931_UIL2_USER_SPEC, "User-specified" },
|
|
{ 0x11, "ISO 7776 DTE-DTE operation" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_mode_vals[] = {
|
|
{ 0x20, "Normal mode" },
|
|
{ 0x40, "Extended mode" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q2931_UIL3_X25_PL 0x06
|
|
#define Q2931_UIL3_ISO_8208 0x07 /* X.25-based */
|
|
#define Q2931_UIL3_X223 0x08 /* X.25-based */
|
|
#define Q2931_UIL3_TR_9577 0x0B
|
|
#define Q2931_UIL3_USER_SPEC 0x10
|
|
|
|
static const value_string q2931_uil3_vals[] = {
|
|
{ Q2931_UIL3_X25_PL, "X.25, packet layer" },
|
|
{ Q2931_UIL3_ISO_8208, "ISO/IEC 8208" },
|
|
{ Q2931_UIL3_X223, "X.223/ISO 8878" },
|
|
{ 0x09, "ISO/IEC 8473" },
|
|
{ 0x0A, "T.70" },
|
|
{ Q2931_UIL3_TR_9577, "ISO/IEC TR 9577" },
|
|
{ Q2931_UIL3_USER_SPEC, "User-specified" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string lane_pid_vals[] = {
|
|
{ 0x0001, "LE Configuration Direct/Control Direct/Control Distribute" },
|
|
{ 0x0002, "Ethernet/IEEE 002.3 LE Data Direct" },
|
|
{ 0x0003, "IEEE 802.5 LE Data Direct" },
|
|
{ 0x0004, "Ethernet/IEEE 802.3 LE Multicast Send/Multicast Forward" },
|
|
{ 0x0005, "IEEE 802.5 LE Multicast Send/Multicast Forward" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
/*
|
|
* Dissect a broadband low layer information information element.
|
|
*/
|
|
static void
|
|
dissect_q2931_bband_low_layer_info_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 uil2_protocol;
|
|
guint8 uil3_protocol;
|
|
guint8 add_l3_info;
|
|
guint32 organization_code;
|
|
guint16 pid;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x20) {
|
|
/*
|
|
* Layer 1 information.
|
|
*/
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User information layer 1 protocol: 0x%02X",
|
|
octet & 0x1F);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x40) {
|
|
/*
|
|
* Layer 2 information.
|
|
*/
|
|
uil2_protocol = octet & 0x1F;
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User information layer 2 protocol: %s",
|
|
val_to_str(uil2_protocol, q2931_uil2_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l2_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (uil2_protocol == Q2931_UIL2_USER_SPEC) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User-specified layer 2 protocol information: 0x%02X",
|
|
octet & 0x7F);
|
|
} else {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Mode: %s",
|
|
val_to_str(octet & 0x60, q2931_mode_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l2_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Window size: %u k", octet & 0x7F);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
l2_done:
|
|
;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x60) {
|
|
/*
|
|
* Layer 3 information.
|
|
*/
|
|
uil3_protocol = octet & 0x1F;
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User information layer 3 protocol: %s",
|
|
val_to_str(uil3_protocol, q2931_uil3_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
|
|
/*
|
|
* XXX - only in Low-layer compatibility information element.
|
|
*/
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
switch (uil3_protocol) {
|
|
|
|
case Q2931_UIL3_X25_PL:
|
|
case Q2931_UIL3_ISO_8208:
|
|
case Q2931_UIL3_X223:
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Mode: %s",
|
|
val_to_str(octet & 0x60, q2931_mode_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Default packet size: %u", octet & 0x0F);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Packet window size: %u", octet & 0x7F);
|
|
offset += 1;
|
|
len -= 1;
|
|
break;
|
|
|
|
case Q2931_UIL3_USER_SPEC:
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Default packet size: %u octets",
|
|
1 << (octet & 0x0F));
|
|
offset += 1;
|
|
len -= 1;
|
|
break;
|
|
|
|
case Q2931_UIL3_TR_9577:
|
|
add_l3_info = (octet & 0x7F) << 1;
|
|
if (octet & Q2931_IE_EXTENSION)
|
|
goto l3_done;
|
|
if (len < 2)
|
|
return;
|
|
add_l3_info |= (tvb_get_guint8(tvb, offset + 1) & 0x40) >> 6;
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Additional layer 3 protocol information: %s",
|
|
val_to_str(add_l3_info, nlpid_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 2;
|
|
len -= 2;
|
|
if (add_l3_info == NLPID_SNAP) {
|
|
if (len < 6)
|
|
return;
|
|
offset += 1;
|
|
len -= 1;
|
|
organization_code = tvb_get_ntoh24(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Organization Code: 0x%06X (%s)",
|
|
organization_code,
|
|
val_to_str(organization_code, oui_vals,
|
|
"Unknown"));
|
|
offset += 3;
|
|
len -= 3;
|
|
|
|
if (len < 2)
|
|
return;
|
|
pid = tvb_get_ntohs(tvb, offset);
|
|
switch (organization_code) {
|
|
|
|
case OUI_ENCAP_ETHER:
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Ethernet type: %s",
|
|
val_to_str(pid, etype_vals,
|
|
"Unknown (0x%04X)"));
|
|
break;
|
|
|
|
case OUI_ATM_FORUM:
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"LANE Protocol ID: %s",
|
|
val_to_str(pid, lane_pid_vals,
|
|
"Unknown (0x%04X)"));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Protocol ID: 0x%04X", pid);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
l3_done:
|
|
;
|
|
}
|
|
|
|
/*
|
|
* Dissect a Cause information element.
|
|
*/
|
|
static const value_string q2931_cause_location_vals[] = {
|
|
{ 0x00, "User (U)" },
|
|
{ 0x01, "Private network serving the local user (LPN)" },
|
|
{ 0x02, "Public network serving the local user (LN)" },
|
|
{ 0x03, "Transit network (TN)" },
|
|
{ 0x04, "Public network serving the remote user (RLN)" },
|
|
{ 0x05, "Private network serving the remote user (RPN)" },
|
|
{ 0x07, "International network (INTL)" },
|
|
{ 0x0A, "Network beyond interworking point (BI)" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* Cause codes for Cause.
|
|
*/
|
|
#define Q2931_CAUSE_UNALLOC_NUMBER 0x01
|
|
#define Q2931_CAUSE_NO_ROUTE_TO_DEST 0x03
|
|
#define Q2931_CAUSE_CALL_REJECTED 0x15
|
|
#define Q2931_CAUSE_NUMBER_CHANGED 0x16
|
|
#define Q2931_CAUSE_CELL_RATE_UNAVAIL 0x25
|
|
#define Q2931_CAUSE_ACCESS_INFO_DISC 0x2B
|
|
#define Q2931_CAUSE_QOS_UNAVAILABLE 0x31
|
|
#define Q2931_CAUSE_CHAN_NONEXISTENT 0x52
|
|
#define Q2931_CAUSE_INCOMPATIBLE_DEST 0x58
|
|
#define Q2931_CAUSE_MAND_IE_MISSING 0x60
|
|
#define Q2931_CAUSE_MT_NONEX_OR_UNIMPL 0x61
|
|
#define Q2931_CAUSE_IE_NONEX_OR_UNIMPL 0x63
|
|
#define Q2931_CAUSE_INVALID_IE_CONTENTS 0x64
|
|
#define Q2931_CAUSE_MSG_INCOMPAT_W_CS 0x65
|
|
#define Q2931_CAUSE_REC_TIMER_EXP 0x66
|
|
|
|
static const value_string q2931_cause_code_vals[] = {
|
|
{ Q2931_CAUSE_UNALLOC_NUMBER, "Unallocated (unassigned) number" },
|
|
{ 0x02, "No route to specified transit network" },
|
|
{ Q2931_CAUSE_NO_ROUTE_TO_DEST, "No route to destination" },
|
|
{ 0x04, "Send special information tone" },
|
|
{ 0x05, "Misdialled trunk prefix" },
|
|
{ 0x06, "Channel unacceptable" },
|
|
{ 0x07, "Call awarded and being delivered in an established channel" },
|
|
{ 0x08, "Preemption" },
|
|
{ 0x09, "Preemption - circuit reserved for reuse" },
|
|
{ 0x0E, "QoR: ported number" },
|
|
{ 0x10, "Normal call clearing" },
|
|
{ 0x11, "User busy" },
|
|
{ 0x12, "No user responding" },
|
|
{ 0x13, "No answer from user (user alerted)" },
|
|
{ 0x14, "Subscriber absent" },
|
|
{ Q2931_CAUSE_CALL_REJECTED, "Call rejected" },
|
|
{ Q2931_CAUSE_NUMBER_CHANGED, "Number changed" },
|
|
{ 0x17, "Redirection to new destination" },
|
|
{ 0x18, "Call rejected due to feature at the destination" },
|
|
{ 0x19, "Exchange routing error" },
|
|
{ 0x1A, "Non-selected user clearing" },
|
|
{ 0x1B, "Destination out of order" },
|
|
{ 0x1C, "Invalid number format (incomplete number)" },
|
|
{ 0x1E, "Response to STATUS ENQUIRY" },
|
|
{ 0x1F, "Normal unspecified" },
|
|
{ 0x20, "Too many pending add party request" },
|
|
{ 0x23, "Requested VPCI/VCI not available" },
|
|
{ 0x24, "VPCI/VCI assignment failure" },
|
|
{ Q2931_CAUSE_CELL_RATE_UNAVAIL,"User cell rate not available" },
|
|
{ 0x26, "Network out of order" },
|
|
{ 0x27, "Permanent frame mode connection out of service" },
|
|
{ 0x28, "Permanent frame mode connection operational" },
|
|
{ 0x29, "Temporary failure" },
|
|
{ 0x2A, "Switching equipment congestion" },
|
|
{ Q2931_CAUSE_ACCESS_INFO_DISC, "Access information discarded" },
|
|
{ 0x2C, "Requested circuit/channel not available" },
|
|
{ 0x2D, "No VPCI/VCI available" },
|
|
{ 0x2F, "Resources unavailable, unspecified" },
|
|
{ Q2931_CAUSE_QOS_UNAVAILABLE, "Quality of service unavailable" },
|
|
{ 0x32, "Requested facility not subscribed" },
|
|
{ 0x35, "Outgoing calls barred within CUG" },
|
|
{ 0x37, "Incoming calls barred within CUG" },
|
|
{ 0x39, "Bearer capability not authorized" },
|
|
{ 0x3A, "Bearer capability not presently available" },
|
|
{ 0x3E, "Inconsistency in designated outgoing access information and subscriber class" },
|
|
{ 0x3F, "Service or option not available, unspecified" },
|
|
{ 0x41, "Bearer capability not implemented" },
|
|
{ 0x42, "Channel type not implemented" },
|
|
{ 0x45, "Requested facility not implemented" },
|
|
{ 0x46, "Only restricted digital information bearer capability is available" },
|
|
{ 0x49, "Unsupported combination of traffic parameters" },
|
|
{ 0x4E, "AAL parameters cannot be supported" },
|
|
{ 0x4F, "Service or option not implemented, unspecified" },
|
|
{ 0x51, "Invalid call reference value" },
|
|
{ Q2931_CAUSE_CHAN_NONEXISTENT, "Identified channel does not exist" },
|
|
{ 0x53, "Call identity does not exist for suspended call" },
|
|
{ 0x54, "Call identity in use" },
|
|
{ 0x55, "No call suspended" },
|
|
{ 0x56, "Call having the requested call identity has been cleared" },
|
|
{ 0x57, "Called user not member of CUG" },
|
|
{ Q2931_CAUSE_INCOMPATIBLE_DEST,"Incompatible destination" },
|
|
{ 0x59, "Invalid endpoint reference" },
|
|
{ 0x5A, "Non-existent CUG" },
|
|
{ 0x5B, "Invalid transit network selection" },
|
|
{ 0x5C, "Too many pending ADD PARTY requests" },
|
|
{ 0x5D, "AAL parameters cannot be supported" },
|
|
{ 0x5F, "Invalid message, unspecified" },
|
|
{ Q2931_CAUSE_MAND_IE_MISSING, "Mandatory information element is missing" },
|
|
{ Q2931_CAUSE_MT_NONEX_OR_UNIMPL,"Message type non-existent or not implemented" },
|
|
{ 0x62, "Message not compatible with call state or message type non-existent or not implemented" },
|
|
{ Q2931_CAUSE_IE_NONEX_OR_UNIMPL,"Information element nonexistant or not implemented" },
|
|
{ Q2931_CAUSE_INVALID_IE_CONTENTS,"Invalid information element contents" },
|
|
{ Q2931_CAUSE_MSG_INCOMPAT_W_CS,"Message not compatible with call state" },
|
|
{ Q2931_CAUSE_REC_TIMER_EXP, "Recovery on timer expiry" },
|
|
{ 0x67, "Parameter non-existent or not implemented - passed on" },
|
|
{ 0x68, "Incorrect message length" },
|
|
{ 0x6E, "Message with unrecognized parameter discarded" },
|
|
{ 0x6F, "Protocol error, unspecified" },
|
|
{ 0x7F, "Internetworking, unspecified" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_cause_condition_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Permanent" },
|
|
{ 0x02, "Transient" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
#define Q2931_REJ_USER_SPECIFIC 0x00
|
|
#define Q2931_REJ_IE_MISSING 0x04
|
|
#define Q2931_REJ_IE_INSUFFICIENT 0x08
|
|
|
|
static const value_string q2931_rejection_reason_vals[] = {
|
|
{ 0x00, "User specific" },
|
|
{ 0x04, "Information element missing" },
|
|
{ 0x08, "Information element contents are not sufficient" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_cause_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 cause_value;
|
|
guint8 rejection_reason;
|
|
guint8 info_element;
|
|
guint8 info_element_ext;
|
|
guint16 info_element_len;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Location: %s",
|
|
val_to_str(octet & 0x0F, q2931_cause_location_vals,
|
|
"Unknown (0x%X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
cause_value = octet & 0x7F;
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Cause value: %s",
|
|
val_to_str(cause_value, q2931_cause_code_vals,
|
|
"Unknown (0x%X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (cause_value) {
|
|
|
|
case Q2931_CAUSE_UNALLOC_NUMBER:
|
|
case Q2931_CAUSE_NO_ROUTE_TO_DEST:
|
|
case Q2931_CAUSE_QOS_UNAVAILABLE:
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Network service: %s",
|
|
(octet & 0x80) ? "User" : "Provider");
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s",
|
|
(octet & 0x40) ? "Abnormal" : "Normal");
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Condition: %s",
|
|
val_to_str(octet & 0x03, q2931_cause_condition_vals,
|
|
"Unknown (0x%X)"));
|
|
break;
|
|
|
|
case Q2931_CAUSE_CALL_REJECTED:
|
|
rejection_reason = octet & 0x7C;
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Rejection reason: %s",
|
|
val_to_str(octet & 0x7C, q2931_rejection_reason_vals,
|
|
"Unknown (0x%X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Condition: %s",
|
|
val_to_str(octet & 0x03, q2931_cause_condition_vals,
|
|
"Unknown (0x%X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (rejection_reason) {
|
|
|
|
case Q2931_REJ_USER_SPECIFIC:
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"User specific diagnostic: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
break;
|
|
|
|
case Q2931_REJ_IE_MISSING:
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Missing information element: %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset), q2931_info_element_vals,
|
|
"Unknown (0x%02X)"));
|
|
break;
|
|
|
|
case Q2931_REJ_IE_INSUFFICIENT:
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Insufficient information element: %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset), q2931_info_element_vals,
|
|
"Unknown (0x%02X)"));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"Diagnostic: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case Q2931_CAUSE_NUMBER_CHANGED:
|
|
/*
|
|
* UNI 3.1 claims this "is formatted as the called party
|
|
* number information element, including information
|
|
* element identifier.
|
|
*/
|
|
info_element = tvb_get_guint8(tvb, offset);
|
|
info_element_ext = tvb_get_guint8(tvb, offset + 1);
|
|
info_element_len = tvb_get_ntohs(tvb, offset + 2);
|
|
dissect_q2931_ie(tvb, offset, info_element_len, tree,
|
|
info_element, info_element_ext);
|
|
break;
|
|
|
|
case Q2931_CAUSE_ACCESS_INFO_DISC:
|
|
case Q2931_CAUSE_INCOMPATIBLE_DEST:
|
|
case Q2931_CAUSE_MAND_IE_MISSING:
|
|
case Q2931_CAUSE_IE_NONEX_OR_UNIMPL:
|
|
case Q2931_CAUSE_INVALID_IE_CONTENTS:
|
|
do {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Information element: %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset), q2931_info_element_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
} while (len != 0);
|
|
break;
|
|
|
|
case Q2931_CAUSE_CELL_RATE_UNAVAIL:
|
|
do {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Cell rate subfield identifier: %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset), q2931_atm_td_subfield_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
} while (len != 0);
|
|
break;
|
|
|
|
case Q2931_CAUSE_CHAN_NONEXISTENT:
|
|
if (len < 2)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"VPCI: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
len -= 2;
|
|
|
|
if (len < 2)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"VCI: %u", tvb_get_ntohs(tvb, offset));
|
|
break;
|
|
|
|
case Q2931_CAUSE_MT_NONEX_OR_UNIMPL:
|
|
case Q2931_CAUSE_MSG_INCOMPAT_W_CS:
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Message type: %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset), q2931_message_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
break;
|
|
|
|
case Q2931_CAUSE_REC_TIMER_EXP:
|
|
if (len < 3)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Timer: %.3s", tvb_get_ptr(tvb, offset, 3));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"Diagnostics: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a Call state information element.
|
|
*/
|
|
static const value_string q2931_call_state_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "Call initiated" },
|
|
{ 0x02, "Overlap sending" },
|
|
{ 0x03, "Outgoing call proceeding" },
|
|
{ 0x04, "Call delivered" },
|
|
{ 0x06, "Call present" },
|
|
{ 0x07, "Call received" },
|
|
{ 0x09, "Connect request" },
|
|
{ 0x0A, "Incoming call proceeding" },
|
|
{ 0x0B, "Active" },
|
|
{ 0x0C, "Disconnect request" },
|
|
{ 0x0F, "Disconnect indication" },
|
|
{ 0x11, "Suspend request" },
|
|
{ 0x13, "Resume request" },
|
|
{ 0x16, "Release request" },
|
|
{ 0x19, "Overlap receiving" },
|
|
{ 0x3D, "Restart request" },
|
|
{ 0x3E, "Restart" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_call_state_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Call state: %s",
|
|
val_to_str(octet & 0x3F, q2931_call_state_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect a (phone) number information element.
|
|
*/
|
|
static const value_string q2931_number_type_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x10, "International number" },
|
|
{ 0x20, "National number" },
|
|
{ 0x30, "Network specific number" },
|
|
{ 0x40, "Subscriber number" },
|
|
{ 0x60, "Abbreviated number" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q2931_ISDN_NUMBERING 0x01
|
|
#define Q2931_NSAP_ADDRESSING 0x02
|
|
|
|
static const value_string q2931_numbering_plan_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ Q2931_ISDN_NUMBERING, "E.164 ISDN/telephony numbering" },
|
|
{ Q2931_NSAP_ADDRESSING, "ISO/IEC 8348 NSAP addressing" },
|
|
{ 0x09, "Private numbering" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_presentation_indicator_vals[] = {
|
|
{ 0x00, "Presentation allowed" },
|
|
{ 0x20, "Presentation restricted" },
|
|
{ 0x40, "Number not available" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_screening_indicator_vals[] = {
|
|
{ 0x00, "User-provided, not screened" },
|
|
{ 0x01, "User-provided, verified and passed" },
|
|
{ 0x02, "User-provided, verified and failed" },
|
|
{ 0x03, "Network-provided" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_number_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 numbering_plan;
|
|
proto_item *ti;
|
|
proto_tree *nsap_tree;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Type of number: %s",
|
|
val_to_str(octet & 0x70, q2931_number_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
numbering_plan = octet & 0x0F;
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Numbering plan: %s",
|
|
val_to_str(numbering_plan, q2931_numbering_plan_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (!(octet & Q2931_IE_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Presentation indicator: %s",
|
|
val_to_str(octet & 0x60, q2931_presentation_indicator_vals,
|
|
"Unknown (0x%X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Screening indicator: %s",
|
|
val_to_str(octet & 0x03, q2931_screening_indicator_vals,
|
|
"Unknown (0x%X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (numbering_plan) {
|
|
|
|
case Q2931_ISDN_NUMBERING:
|
|
proto_tree_add_text(tree, tvb, offset, len, "Number: %.*s",
|
|
len, tvb_get_ptr(tvb, offset, len));
|
|
break;
|
|
|
|
case Q2931_NSAP_ADDRESSING:
|
|
if (len < 20) {
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"Number (too short): %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
return;
|
|
}
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "Number");
|
|
nsap_tree = proto_item_add_subtree(ti, ett_q2931_nsap);
|
|
dissect_atm_nsap(tvb, offset, len, nsap_tree);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, len, "Number: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a party subaddress information element.
|
|
*/
|
|
static const value_string q2931_subaddress_type_vals[] = {
|
|
{ 0x00, "X.213/ISO 8348 NSAP" },
|
|
{ 0x10, "User-specified ATM endsystem address" },
|
|
{ 0x20, "User-specified" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_odd_even_indicator_vals[] = {
|
|
{ 0x00, "Even number of address signals" },
|
|
{ 0x10, "Odd number of address signals" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_party_subaddr_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Type of subaddress: %s",
|
|
val_to_str(octet & 0x70, q2931_subaddress_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Odd/even indicator: %s",
|
|
val_to_str(octet & 0x10, q2931_odd_even_indicator_vals,
|
|
NULL));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, len, "Subaddress: %s",
|
|
tvb_bytes_to_str(tvb, offset, len));
|
|
}
|
|
|
|
/*
|
|
* Dissect a connection identifier information element.
|
|
*/
|
|
static const value_string q2931_vp_associated_signalling_vals[] = {
|
|
{ 0x00, "Yes" },
|
|
{ 0x08, "No - explicit indication of VPCI" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q2931_preferred_exclusive_vals[] = {
|
|
{ 0x00, "Exclusive VPCI; exclusive VCI" },
|
|
{ 0x01, "Exclusive VPCI; any VCI" },
|
|
{ 0x04, "Exclusive VPCI; no VCI" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_connection_identifier_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"VP-associated signalling: %s",
|
|
val_to_str(octet & 0x18, q2931_vp_associated_signalling_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Preferred/exclusive: %s",
|
|
val_to_str(octet & 0x07, q2931_preferred_exclusive_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len < 2)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, 2, "VPCI: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
len -= 2;
|
|
|
|
if (len < 2)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, 2, "VCI: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
}
|
|
|
|
/*
|
|
* Dissect an End-to-end transit delay information element.
|
|
*/
|
|
static void
|
|
dissect_q2931_e2e_transit_delay_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 identifier;
|
|
guint16 value;
|
|
|
|
while (len >= 3) {
|
|
identifier = tvb_get_guint8(tvb, offset);
|
|
value = tvb_get_ntohs(tvb, offset + 1);
|
|
switch (identifier) {
|
|
|
|
case 0x01: /* Cumulative transit delay identifier */
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Cumulative transit delay: %u ms", value);
|
|
break;
|
|
|
|
case 0x03: /* Maximum transit delay identifier */
|
|
if (value == 0xFFFF) {
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Any end-to-end transit delay value acceptable");
|
|
} else {
|
|
proto_tree_add_text(tree, tvb, offset, 3,
|
|
"Maximum end-to-end transit delay: %u ms",
|
|
value);
|
|
}
|
|
break;
|
|
|
|
default: /* Unknown transit delay identifier */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Unknown transit delay identifier (0x%02X)",
|
|
identifier);
|
|
return; /* give up */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a Quality of Service parameter information element.
|
|
*/
|
|
static const value_string q2931_qos_parameter_vals[] = {
|
|
{ 0x00, "Unspecified QOS class" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_qos_parameter_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"QOS class forward: %s",
|
|
val_to_str(octet, q2931_qos_parameter_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"QOS class backward: %s",
|
|
val_to_str(octet, q2931_qos_parameter_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect a broadband repeat indicator.
|
|
*/
|
|
static const value_string q2931_bband_rpt_indicator_vals[] = {
|
|
{ 0x02, "Prioritized list for selecting one possibility (descending order)" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_bband_rpt_indicator(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Broadband repeat indicator: %s",
|
|
val_to_str(octet & 0x0F, q2931_bband_rpt_indicator_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect a restart indicator.
|
|
*/
|
|
static const value_string q2931_class_vals[] = {
|
|
{ 0x00, "Indicated VC" },
|
|
{ 0x01, "All VC's in the indicated VPC controlled via this channel" },
|
|
{ 0x02, "All VC's controlled by the L3 entity that sent this message" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_restart_indicator(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Restart indicator: %s",
|
|
val_to_str(octet & 0x07, q2931_class_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect an broadband sending complete information element.
|
|
*/
|
|
static void
|
|
dissect_q2931_bband_sending_compl_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 identifier;
|
|
|
|
while (len != 0) {
|
|
identifier = tvb_get_guint8(tvb, offset);
|
|
switch (identifier) {
|
|
|
|
case 0xA1: /* Sending complete indication */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Broadband sending complete indication");
|
|
offset += 1;
|
|
len -= 1;
|
|
break;
|
|
|
|
default: /* unknown broadband sending complete element */
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Unknown broadband sending complete element (0x%02X)",
|
|
identifier);
|
|
return; /* give up */
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a Transit network selection information element.
|
|
*/
|
|
static const value_string q2931_netid_type_vals[] = {
|
|
{ 0x00, "User specified" },
|
|
{ 0x20, "National network identification" },
|
|
{ 0x30, "International network identification" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_netid_plan_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Carrier Identification Code" },
|
|
{ 0x03, "X.121 data network identification code" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_transit_network_sel_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Type of network identification: %s",
|
|
val_to_str(octet & 0x70, q2931_netid_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Network identification plan: %s",
|
|
val_to_str(octet & 0x0F, q2931_netid_plan_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_text(tree, tvb, offset, len,
|
|
"Network identification: %.*s", len, tvb_get_ptr(tvb, offset, len));
|
|
}
|
|
|
|
/*
|
|
* Dissect an OAM traffic descriptor information element.
|
|
*/
|
|
static const value_string q2931_shaping_indicator_vals[] = {
|
|
{ 0x00, "No user specified requirement" },
|
|
{ 0x20, "Aggregate shaping of user and OAM cells not allowed" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_user_net_fault_mgmt_vals[] = {
|
|
{ 0x00, "No user-originated fault managment indications" },
|
|
{ 0x01, "User-originated fault management indications, cell rate 1 cell/s" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_fwd_e2e_oam_f5_flow_indicator_vals[] = {
|
|
{ 0x00, "0% of the forward cell rate" },
|
|
{ 0x10, "0.1% of the forward cell rate" },
|
|
{ 0x40, "1% of the forward cell rate" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
static const value_string q2931_bwd_e2e_oam_f5_flow_indicator_vals[] = {
|
|
{ 0x00, "0% of the backward cell rate" },
|
|
{ 0x01, "0.1% of the backward cell rate" },
|
|
{ 0x04, "1% of the backward cell rate" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_oam_traffic_descriptor_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Shaping indicator: %s",
|
|
val_to_str(octet & 0x60, q2931_shaping_indicator_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Use of end-to-end OAM F5 flow is %s",
|
|
(octet & 0x10) ? "mandatory" : "optional");
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"User-Network fault management indicator: %s",
|
|
val_to_str(octet & 0x07, q2931_user_net_fault_mgmt_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Forward end-to-end OAM F5 flow indicator: %s",
|
|
val_to_str(octet & 0x70, q2931_fwd_e2e_oam_f5_flow_indicator_vals,
|
|
"Unknown (0x%02X)"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Backward end-to-end OAM F5 flow indicator: %s",
|
|
val_to_str(octet & 0x07, q2931_bwd_e2e_oam_f5_flow_indicator_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
/*
|
|
* Dissect an Endpoint reference information element.
|
|
*/
|
|
static const value_string q2931_endpoint_reference_type_vals[] = {
|
|
{ 0x00, "Locally defined integer" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_endpoint_reference_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint16 value;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Endpoint reference type: %s",
|
|
val_to_str(octet, q2931_endpoint_reference_type_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len < 2)
|
|
return;
|
|
value = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Endpoint reference flag: %s",
|
|
(value & 0x8000) ? "Message sent to side that originates the endpoint reference" :
|
|
"Message sent from side that originates the endpoint reference");
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Endpoint reference identifier value: %u",
|
|
value & 0x7FFF);
|
|
}
|
|
|
|
/*
|
|
* Dissect an Endpoint state information element.
|
|
*/
|
|
static const value_string q2931_endpoint_reference_party_state_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "ADD PARTY initiated" },
|
|
{ 0x06, "ADD PARTY received" },
|
|
{ 0x0B, "DROP PARTY initiated" },
|
|
{ 0x0C, "DROP PARTY received" },
|
|
{ 0x0A, "Active" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q2931_endpoint_state_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Endpoint reference party-state: %s",
|
|
val_to_str(octet & 0x3F, q2931_endpoint_reference_party_state_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
|
|
static void
|
|
dissect_q2931_ie_contents(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, guint8 info_element)
|
|
{
|
|
switch (info_element) {
|
|
|
|
case Q2931_IE_BBAND_LOCKING_SHIFT:
|
|
case Q2931_IE_BBAND_NLOCKING_SHIFT:
|
|
dissect_q2931_shift_ie(tvb, offset, len, tree, info_element);
|
|
break;
|
|
|
|
case Q2931_IE_NBAND_BEARER_CAP:
|
|
case Q2931_IE_NBAND_LOW_LAYER_COMPAT:
|
|
dissect_q931_bearer_capability_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_NBAND_HIGH_LAYER_COMPAT:
|
|
dissect_q931_high_layer_compat_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_PROGRESS_INDICATOR:
|
|
dissect_q931_progress_indicator_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_AAL_PARAMETERS:
|
|
dissect_q2931_aal_parameters_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_ATM_USER_CELL_RATE:
|
|
dissect_q2931_atm_cell_rate_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_BEARER_CAP:
|
|
dissect_q2931_bband_bearer_cap_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_HI_LAYER_INFO:
|
|
dissect_q2931_bband_hi_layer_info_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_LOW_LAYER_INFO:
|
|
dissect_q2931_bband_low_layer_info_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_CALL_STATE:
|
|
dissect_q2931_call_state_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_CALLED_PARTY_NUMBER:
|
|
case Q2931_IE_CALLING_PARTY_NUMBER:
|
|
dissect_q2931_number_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_CALLED_PARTY_SUBADDR:
|
|
case Q2931_IE_CALLING_PARTY_SUBADDR:
|
|
dissect_q2931_party_subaddr_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_CAUSE:
|
|
dissect_q2931_cause_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_CONNECTION_IDENTIFIER:
|
|
dissect_q2931_connection_identifier_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_E2E_TRANSIT_DELAY:
|
|
dissect_q2931_e2e_transit_delay_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_QOS_PARAMETER:
|
|
dissect_q2931_qos_parameter_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_RPT_INDICATOR:
|
|
dissect_q2931_bband_rpt_indicator(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_RESTART_INDICATOR:
|
|
dissect_q2931_restart_indicator(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_SENDING_COMPL:
|
|
dissect_q2931_bband_sending_compl_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_TRANSIT_NETWORK_SEL:
|
|
dissect_q2931_transit_network_sel_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_OAM_TRAFFIC_DESCRIPTOR:
|
|
dissect_q2931_oam_traffic_descriptor_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_ENDPOINT_REFERENCE:
|
|
dissect_q2931_endpoint_reference_ie(tvb, offset, len, tree);
|
|
break;
|
|
|
|
case Q2931_IE_ENDPOINT_STATE:
|
|
dissect_q2931_endpoint_state_ie(tvb, offset, len, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_q2931_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tree,
|
|
guint8 info_element, guint8 info_element_ext)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ie_tree;
|
|
proto_tree *ie_ext_tree;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, 1+1+2+len, "%s",
|
|
val_to_str(info_element, q2931_info_element_vals,
|
|
"Unknown information element (0x%02X)"));
|
|
ie_tree = proto_item_add_subtree(ti, ett_q2931_ie);
|
|
proto_tree_add_text(ie_tree, tvb, offset, 1, "Information element: %s",
|
|
val_to_str(info_element, q2931_info_element_vals,
|
|
"Unknown (0x%02X)"));
|
|
ti = proto_tree_add_text(ie_tree, tvb, offset + 1, 1,
|
|
"Information element extension: 0x%02x",
|
|
info_element_ext);
|
|
ie_ext_tree = proto_item_add_subtree(ti, ett_q2931_ie_ext);
|
|
proto_tree_add_text(ie_ext_tree, tvb, offset + 1, 1,
|
|
decode_enumerated_bitfield(info_element_ext,
|
|
Q2931_IE_COMPAT_CODING_STD, 8,
|
|
coding_std_vals, "Coding standard: %s"));
|
|
proto_tree_add_text(ie_ext_tree, tvb, offset + 1, 1,
|
|
decode_boolean_bitfield(info_element_ext,
|
|
Q2931_IE_COMPAT_FOLLOW_INST, 8,
|
|
"Follow explicit error handling instructions",
|
|
"Regular error handling procedures apply"));
|
|
if (info_element_ext & Q2931_IE_COMPAT_FOLLOW_INST) {
|
|
proto_tree_add_text(ie_ext_tree, tvb, offset + 1, 1,
|
|
decode_enumerated_bitfield(info_element_ext,
|
|
Q2931_IE_COMPAT_ACTION_IND, 8,
|
|
ie_action_ind_vals,
|
|
"Action indicator: %s"));
|
|
}
|
|
proto_tree_add_text(ie_tree, tvb, offset + 2, 2, "Length: %u", len);
|
|
|
|
if ((info_element_ext & Q2931_IE_COMPAT_CODING_STD)
|
|
== Q2931_ITU_STANDARDIZED_CODING) {
|
|
dissect_q2931_ie_contents(tvb, offset + 4,
|
|
len, ie_tree, info_element);
|
|
} else {
|
|
/*
|
|
* We don't know how it's encoded, so just
|
|
* dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_text(ie_tree, tvb, offset + 4, len,
|
|
"Data: %s", tvb_bytes_to_str(tvb, offset + 4, len));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_q2931(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
int offset = 0;
|
|
proto_tree *q2931_tree = NULL;
|
|
proto_item *ti;
|
|
proto_tree *ext_tree;
|
|
guint8 call_ref_len;
|
|
guint8 call_ref[15];
|
|
guint8 message_type;
|
|
guint8 message_type_ext;
|
|
guint16 message_len;
|
|
guint8 info_element;
|
|
guint8 info_element_ext;
|
|
guint16 info_element_len;
|
|
int codeset;
|
|
gboolean non_locking_shift;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Q.2931");
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_q2931, tvb, offset, -1,
|
|
FALSE);
|
|
q2931_tree = proto_item_add_subtree(ti, ett_q2931);
|
|
|
|
proto_tree_add_uint(q2931_tree, hf_q2931_discriminator, tvb, offset, 1, tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
call_ref_len = tvb_get_guint8(tvb, offset) & 0xF; /* XXX - do as a bit field? */
|
|
if (q2931_tree != NULL)
|
|
proto_tree_add_uint(q2931_tree, hf_q2931_call_ref_len, tvb, offset, 1, call_ref_len);
|
|
offset += 1;
|
|
if (call_ref_len != 0) {
|
|
tvb_memcpy(tvb, call_ref, offset, call_ref_len);
|
|
if (q2931_tree != NULL) {
|
|
proto_tree_add_boolean(q2931_tree, hf_q2931_call_ref_flag,
|
|
tvb, offset, 1, (call_ref[0] & 0x80) != 0);
|
|
call_ref[0] &= 0x7F;
|
|
proto_tree_add_bytes(q2931_tree, hf_q2931_call_ref, tvb, offset, call_ref_len, call_ref);
|
|
}
|
|
offset += call_ref_len;
|
|
}
|
|
message_type = tvb_get_guint8(tvb, offset);
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(message_type, q2931_message_type_vals,
|
|
"Unknown message type (0x%02X)"));
|
|
}
|
|
if (q2931_tree != NULL)
|
|
proto_tree_add_uint(q2931_tree, hf_q2931_message_type, tvb, offset, 1, message_type);
|
|
offset += 1;
|
|
|
|
message_type_ext = tvb_get_guint8(tvb, offset);
|
|
if (q2931_tree != NULL) {
|
|
ti = proto_tree_add_uint(q2931_tree, hf_q2931_message_type_ext, tvb,
|
|
offset, 1, message_type_ext);
|
|
ext_tree = proto_item_add_subtree(ti, ett_q2931_ext);
|
|
proto_tree_add_boolean(ext_tree, hf_q2931_message_flag, tvb,
|
|
offset, 1, message_type_ext);
|
|
if (message_type_ext & Q2931_MSG_TYPE_EXT_FOLLOW_INST) {
|
|
proto_tree_add_uint(ext_tree, hf_q2931_message_action_indicator, tvb,
|
|
offset, 1, message_type_ext);
|
|
}
|
|
}
|
|
offset += 1;
|
|
|
|
message_len = tvb_get_ntohs(tvb, offset);
|
|
if (q2931_tree != NULL)
|
|
proto_tree_add_uint(q2931_tree, hf_q2931_message_len, tvb, offset, 2, message_len);
|
|
offset += 2;
|
|
|
|
/*
|
|
* And now for the information elements....
|
|
*/
|
|
codeset = 0; /* start out in codeset 0 */
|
|
non_locking_shift = TRUE;
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
info_element = tvb_get_guint8(tvb, offset);
|
|
info_element_ext = tvb_get_guint8(tvb, offset + 1);
|
|
info_element_len = tvb_get_ntohs(tvb, offset + 2);
|
|
if (q2931_tree != NULL) {
|
|
dissect_q2931_ie(tvb, offset, info_element_len,
|
|
q2931_tree, info_element, info_element_ext);
|
|
}
|
|
if (non_locking_shift)
|
|
codeset = 0;
|
|
|
|
/*
|
|
* Handle shifts.
|
|
*/
|
|
switch (info_element) {
|
|
|
|
case Q2931_IE_BBAND_LOCKING_SHIFT:
|
|
if (info_element_len >= 1) {
|
|
non_locking_shift = FALSE;
|
|
codeset = tvb_get_guint8(tvb, offset + 4) & 0x07;
|
|
}
|
|
break;
|
|
|
|
case Q2931_IE_BBAND_NLOCKING_SHIFT:
|
|
if (info_element_len >= 1) {
|
|
non_locking_shift = TRUE;
|
|
codeset = tvb_get_guint8(tvb, offset + 4) & 0x07;
|
|
}
|
|
break;
|
|
}
|
|
offset += 1 + 1 + 2 + info_element_len;
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_q2931(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_q2931_discriminator,
|
|
{ "Protocol discriminator", "q2931.disc", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_call_ref_len,
|
|
{ "Call reference value length", "q2931.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_call_ref_flag,
|
|
{ "Call reference flag", "q2931.call_ref_flag", FT_BOOLEAN, BASE_NONE, TFS(&tfs_call_ref_flag), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_call_ref,
|
|
{ "Call reference value", "q2931.call_ref", FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_message_type,
|
|
{ "Message type", "q2931.message_type", FT_UINT8, BASE_HEX, VALS(q2931_message_type_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_message_type_ext,
|
|
{ "Message type extension", "q2931.message_type_ext", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_message_flag,
|
|
{ "Flag", "q2931.message_flag", FT_BOOLEAN, 8, TFS(&tos_msg_flag), Q2931_MSG_TYPE_EXT_FOLLOW_INST,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_message_action_indicator,
|
|
{ "Action indicator", "q2931.message_action_indicator", FT_UINT8, BASE_DEC, VALS(msg_action_ind_vals), Q2931_MSG_TYPE_EXT_ACTION_IND,
|
|
"", HFILL }},
|
|
|
|
{ &hf_q2931_message_len,
|
|
{ "Message length", "q2931.message_len", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_q2931,
|
|
&ett_q2931_ext,
|
|
&ett_q2931_ie,
|
|
&ett_q2931_ie_ext,
|
|
&ett_q2931_nsap,
|
|
};
|
|
|
|
proto_q2931 = proto_register_protocol("Q.2931", "Q.2931", "q2931");
|
|
proto_register_field_array (proto_q2931, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("q2931", dissect_q2931, proto_q2931);
|
|
}
|