* Routines for Q.2931 frame disassembly
* Guy Harris <guy@alum.mit.edu>
*
- * $Id: packet-q2931.c,v 1.1 1999/11/19 09:55:37 guy Exp $
+ * $Id: packet-q2931.c,v 1.28 2002/08/02 23:35:56 jmayer Exp $
*
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * 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
# include "config.h"
#endif
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
#include <stdio.h>
#include <glib.h>
#include <string.h>
-#include "packet.h"
+#include <epan/packet.h>
+#include "oui.h"
+#include "nlpid.h"
+#include "etypes.h"
+#include "packet-q931.h"
+#include "packet-arp.h"
/*
* See
*
* 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.
+ * ATM code, and from Q.2931 (and Q.931) itself.
*/
static int proto_q2931 = -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_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_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 }
};
+/*
+ * 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
-#define Q2931_IE_ATM_USER_CELL_RATE 0x59
+#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_BRER_CAPACITY 0x5E /* Broadband bearer capacity */
+#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_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_BRER_CAPACITY, "Broadband bearer capacity" },
+ { 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_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 }
};
-void
-dissect_q2931(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+/*
+ * 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_coding_standard_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 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" },
+ { 0x10, "Normal call clearing" },
+ { 0x11, "User busy" },
+ { 0x12, "No user responding" },
+ { Q2931_CAUSE_CALL_REJECTED, "Call rejected" },
+ { Q2931_CAUSE_NUMBER_CHANGED, "Number changed" },
+ { 0x17, "User rejects calls with calling line identification restriction" },
+ { 0x1B, "Destination out of order" },
+ { 0x1C, "Invalid number format (incomplete number)" },
+ { 0x1E, "Response to STATUS ENQUIRY" },
+ { 0x1F, "Normal unspecified" },
+ { 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" },
+ { 0x29, "Temporary failure" },
+ { Q2931_CAUSE_ACCESS_INFO_DISC, "Access information discarded" },
+ { 0x2D, "No VPCI/VCI available" },
+ { 0x2F, "Resources unavailable, unspecified" },
+ { Q2931_CAUSE_QOS_UNAVAILABLE, "Quality of service unavailable" },
+ { 0x39, "Bearer capability not authorized" },
+ { 0x3A, "Bearer capability not presently available" },
+ { 0x3F, "Service or option not available, unspecified" },
+ { 0x41, "Bearer capability not implemented" },
+ { 0x49, "Unsupported combination of traffic parameters" },
+ { 0x4E, "AAL parameters cannot be supported" },
+ { 0x51, "Invalid call reference value" },
+ { Q2931_CAUSE_CHAN_NONEXISTENT, "Identified channel does not exist" },
+ { Q2931_CAUSE_INCOMPATIBLE_DEST,"Incompatible destination" },
+ { 0x59, "Invalid endpoint reference" },
+ { 0x5B, "Invalid transit network selection" },
+ { 0x5C, "Too many pending ADD PARTY requests" },
+ { Q2931_CAUSE_MAND_IE_MISSING, "Mandatory information element is missing" },
+ { Q2931_CAUSE_MT_NONEX_OR_UNIMPL,"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" },
+ { 0x68, "Incorrect message length" },
+ { 0x6F, "Protocol error, 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_cause_condition_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_tree *q2931_tree = NULL;
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 info_element_ext;
guint16 info_element_len;
int codeset;
- int non_locking_shift;
+ gboolean non_locking_shift;
- if (check_col(fd, COL_PROTOCOL))
- col_add_str(fd, COL_PROTOCOL, "Q.2931");
+ 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, offset,
- END_OF_FRAME, NULL);
+ ti = proto_tree_add_item(tree, proto_q2931, tvb, offset, -1,
+ FALSE);
q2931_tree = proto_item_add_subtree(ti, ett_q2931);
- proto_tree_add_item(q2931_tree, hf_q2931_discriminator, offset, 1, pd[offset]);
+ proto_tree_add_uint(q2931_tree, hf_q2931_discriminator, tvb, offset, 1, tvb_get_guint8(tvb, offset));
}
offset += 1;
- call_ref_len = pd[offset] & 0xF; /* XXX - do as a bit field? */
+ call_ref_len = tvb_get_guint8(tvb, offset) & 0xF; /* XXX - do as a bit field? */
if (q2931_tree != NULL)
- proto_tree_add_item(q2931_tree, hf_q2931_call_ref_len, offset, 1, call_ref_len);
+ proto_tree_add_uint(q2931_tree, hf_q2931_call_ref_len, tvb, offset, 1, call_ref_len);
offset += 1;
if (call_ref_len != 0) {
/* XXX - split this into flag and value */
- memcpy(call_ref, &pd[offset], call_ref_len);
+ tvb_memcpy(tvb, call_ref, offset, call_ref_len);
if (q2931_tree != NULL)
- proto_tree_add_item(q2931_tree, hf_q2931_call_ref, offset, call_ref_len, call_ref);
+ proto_tree_add_bytes(q2931_tree, hf_q2931_call_ref, tvb, offset, call_ref_len, call_ref);
offset += call_ref_len;
}
- message_type = pd[offset];
- if (check_col(fd, COL_INFO)) {
- col_add_str(fd, COL_INFO,
+ 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_item(q2931_tree, hf_q2931_message_type, offset, 1, message_type);
+ proto_tree_add_uint(q2931_tree, hf_q2931_message_type, tvb, offset, 1, message_type);
offset += 1;
- message_type_ext = pd[offset];
- if (q2931_tree != NULL)
- proto_tree_add_item(q2931_tree, hf_q2931_message_type_ext, offset, 1, message_type_ext);
+ 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 = pntohs(&pd[offset]);
+ message_len = tvb_get_ntohs(tvb, offset);
if (q2931_tree != NULL)
- proto_tree_add_item(q2931_tree, hf_q2931_message_len, offset, 2, message_len);
+ proto_tree_add_uint(q2931_tree, hf_q2931_message_len, tvb, offset, 2, message_len);
offset += 2;
/*
*/
codeset = 0; /* start out in codeset 0 */
non_locking_shift = TRUE;
- while (IS_DATA_IN_FRAME(offset)) {
- info_element = pd[offset];
- if (!BYTES_ARE_IN_FRAME(offset + 1, 1))
- break; /* ran past end of frame */
- info_element_ext = pd[offset + 1];
- if (!BYTES_ARE_IN_FRAME(offset + 2, 2))
- break; /* ran past end of frame */
- info_element_len = pntohs(&pd[offset + 2]);
- if (!BYTES_ARE_IN_FRAME(offset + 4, info_element_len))
- break; /* ran past end of frame */
+ 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) {
- ti = proto_tree_add_text(q2931_tree, offset,
- 1+1+2+info_element_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, offset, 1,
- "Information element: %s",
- val_to_str(info_element, q2931_info_element_vals,
- "Unknown"));
- proto_tree_add_text(ie_tree, offset + 1, 1,
- "Information element extension: 0x%02x",
- info_element_ext);
- proto_tree_add_text(ie_tree, offset + 2, 2,
- "Length: %u", info_element_len);
+ 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,
- "" }},
-
- { &hf_q2931_call_ref_len,
- { "Call reference value length", "q2931.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0,
- "" }},
-
- { &hf_q2931_call_ref,
- { "Call reference value", "q2931.call_ref", FT_BYTES, BASE_HEX, NULL, 0x0,
- "" }},
-
- { &hf_q2931_message_type,
- { "Message type", "q2931.message_type", FT_UINT8, BASE_HEX, VALS(q2931_message_type_vals), 0x0,
- "" }},
-
- { &hf_q2931_message_type_ext,
- { "Message type extension", "q2931.message_type_ext", FT_UINT8, BASE_HEX, NULL, 0x0,
- "" }},
-
- { &hf_q2931_message_len,
- { "Message length", "q2931.message_len", FT_UINT16, BASE_DEC, NULL, 0x0,
- "" }},
-
- };
- static gint *ett[] = {
- &ett_q2931,
- &ett_q2931_ie,
- };
-
- proto_q2931 = proto_register_protocol ("Q.2931", "q2931");
- proto_register_field_array (proto_q2931, hf, array_length(hf));
- proto_register_subtree_array(ett, array_length(ett));
+ 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,
+ { "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);
}
git.samba.org / obnox / wireshark / wip.git / blobdiff