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wireshark/epan/dissectors/packet-actrace.c

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/* packet-actrace.c
* Routines for AudioCodes Trunk traces packet disassembly
*
* Copyright (c) 2005 by Alejandro Vaquero <alejandro.vaquero@verso.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/tap.h>
#include "packet-actrace.h"
#define UDP_PORT_ACTRACE 2428 /* Not IANA registered */
#define NOT_ACTRACE 0
#define ACTRACE_CAS 1
#define ACTRACE_ISDN 2
/* Forward declarations */
void proto_register_actrace(void);
void proto_reg_handoff_actrace(void);
/* Define the actrace proto */
static int proto_actrace = -1;
/* Define many headers for actrace */
/* ISDN headers */
static int hf_actrace_isdn_direction = -1;
static int hf_actrace_isdn_trunk = -1;
static int hf_actrace_isdn_length = -1;
/* CAS headers */
static int hf_actrace_cas_time = -1;
static int hf_actrace_cas_source = -1;
static int hf_actrace_cas_current_state = -1;
static int hf_actrace_cas_event = -1;
static int hf_actrace_cas_next_state = -1;
static int hf_actrace_cas_function = -1;
static int hf_actrace_cas_par0 = -1;
static int hf_actrace_cas_par1 = -1;
static int hf_actrace_cas_par2 = -1;
static int hf_actrace_cas_trunk = -1;
static int hf_actrace_cas_bchannel = -1;
static int hf_actrace_cas_connection_id = -1;
static dissector_handle_t lapd_phdr_handle;
#define ACTRACE_CAS_SOURCE_DSP 0
#define ACTRACE_CAS_SOURCE_USER 1
#define ACTRACE_CAS_SOURCE_TABLE 2
static const value_string actrace_cas_source_vals[] = {
{ACTRACE_CAS_SOURCE_DSP, "DSP"},
{ACTRACE_CAS_SOURCE_USER, "User"},
{ACTRACE_CAS_SOURCE_TABLE, "Table"},
{0, NULL }
};
static const value_string actrace_cas_source_vals_short[] = {
{ACTRACE_CAS_SOURCE_DSP, "D"},
{ACTRACE_CAS_SOURCE_USER, "U"},
{ACTRACE_CAS_SOURCE_TABLE, "T"},
{0, NULL }
};
#define ACTRACE_CAS_EV_11 17
#define ACTRACE_CAS_EV_10 18
#define ACTRACE_CAS_EV_01 19
#define ACTRACE_CAS_EV_00 20
#define ACTRACE_CAS_EV_DTMF 302
#define ACTRACE_CAS_EV_FIRST_DIGIT 63
static const value_string actrace_cas_event_ab_vals[] = {
{ACTRACE_CAS_EV_11, "11"},
{ACTRACE_CAS_EV_10, "10"},
{ACTRACE_CAS_EV_01, "01"},
{ACTRACE_CAS_EV_00, "00"},
{0, NULL}
};
static const value_string actrace_cas_mf_vals[] = {
{32, "1"},
{33, "2"},
{34, "3"},
{35, "4"},
{36, "5"},
{37, "6"},
{38, "7"},
{39, "8"},
{40, "9"},
{41, "0"},
{42, "A"},
{43, "B"},
{44, "C"},
{45, "*"},
{46, "#"},
{0, NULL}
};
static value_string_ext actrace_cas_mf_vals_ext = VALUE_STRING_EXT_INIT(actrace_cas_mf_vals);
static const value_string actrace_cas_event_vals[] = {
{ 0, "FUNCTION0"},
{ 1, "FUNCTION1"},
{ 2, "FUNCTION2"},
{ 3, "FUNCTION3"},
{ 4, "EV_PLACE_CALL"},
{ 5, "EV_TIMER_EXPIRED1"},
{ 6, "EV_TIMER_EXPIRED2"},
{ 7, "EV_TIMER_EXPIRED3"},
{ 8, "EV_TIMER_EXPIRED4"},
{ 9, "EV_TIMER_EXPIRED5"},
{ 10, "EV_TIMER_EXPIRED6"},
{ 11, "EV_TIMER_EXPIRED7"},
{ 12, "EV_TIMER_EXPIRED8"},
{ 13, "EV_ANSWER"},
{ 14, "EV_DIAL_TONE_DETECTED"},
{ 15, "EV_DIAL_ENDED"},
{ 16, "EV_DISCONNECT"},
{ ACTRACE_CAS_EV_11, "EV_CAS_1_1"},
{ ACTRACE_CAS_EV_10, "EV_CAS_1_0"},
{ ACTRACE_CAS_EV_01, "EV_CAS_0_1"},
{ ACTRACE_CAS_EV_00, "EV_CAS_0_0"},
{ 21, "EV_RB_TONE_STARTED"},
{ 22, "EV_RB_TONE_STOPPED"},
{ 23, "EV_BUSY_TONE"},
{ 24, "EV_FAST_BUSY_TONE"},
{ 25, "EV_HELLO_DETECTED"},
{ 26, "EV_DIAL_TONE_STOPPED"},
{ 27, "EV_DISCONNECT_INCOMING"},
{ 28, "EV_RELEASE_CALL"},
{ 29, "EV_DIALED_NUM_DETECTED"},
{ 30, "EV_COUNTER1_EXPIRED"},
{ 31, "EV_COUNTER2_EXPIRED"},
{ 32, "EV_MFRn_1"},
{ 33, "EV_MFRn_2"},
{ 34, "EV_MFRn_3"},
{ 35, "EV_MFRn_4"},
{ 36, "EV_MFRn_5"},
{ 37, "EV_MFRn_6"},
{ 38, "EV_MFRn_7"},
{ 39, "EV_MFRn_8"},
{ 40, "EV_MFRn_9"},
{ 41, "EV_MFRn_10"},
{ 42, "EV_MFRn_11"},
{ 43, "EV_MFRn_12"},
{ 44, "EV_MFRn_13"},
{ 45, "EV_MFRn_14"},
{ 46, "EV_MFRn_15"},
{ 47, "EV_MFRn_1_STOPPED"},
{ 48, "EV_MFRn_2_STOPPED"},
{ 49, "EV_MFRn_3_STOPPED"},
{ 50, "EV_MFRn_4_STOPPED"},
{ 51, "EV_MFRn_5_STOPPED"},
{ 52, "EV_MFRn_6_STOPPED"},
{ 53, "EV_MFRn_7_STOPPED"},
{ 54, "EV_MFRn_8_STOPPED"},
{ 55, "EV_MFRn_9_STOPPED"},
{ 56, "EV_MFRn_10_STOPPED"},
{ 57, "EV_MFRn_11_STOPPED"},
{ 58, "EV_MFRn_12_STOPPED"},
{ 59, "EV_MFRn_13_STOPPED"},
{ 60, "EV_MFRn_14_STOPPED"},
{ 61, "EV_MFRn_15_STOPPED"},
{ 62, "EV_ANI_NUM_DETECTED"},
{ ACTRACE_CAS_EV_FIRST_DIGIT, "EV_FIRST_DIGIT"},
{ 64, "EV_END_OF_MF_DIGIT"},
{ 65, "EV_ACCEPT"},
{ 66, "EV_REJECT_BUSY"},
{ 67, "EV_REJECT_CONGESTION"},
{ 68, "EV_REJECT_UNALLOCATED"},
{ 69, "EV_REJECT_RESERVE1"},
{ 70, "EV_REJECT_RESERVE2"},
{ 71, "EV_NO_ANI"},
{ 100, "EV_INIT_CHANNEL"},
{ 101, "EV_BUSY_TONE_STOPPED"},
{ 102, "EV_FAST_BUSY_TONE_STOPPED"},
{ 103, "EV_TO_USER"},
{ 104, "SEND_FIRST_DIGIT"},
{ 110, "EV_CLOSE_CHANNEL"},
{ 111, "EV_OPEN_CHANNEL"},
{ 112, "EV_FAIL_DIAL"},
{ 113, "EV_FAIL_SEND_CAS"},
{ 114, "EV_ALARM"},
{ ACTRACE_CAS_EV_DTMF, "EV_DTMF"},
{1010, "EV_TIMER_EXPIRED10"},
{1020, "EV_DEBOUNCE_TIMER_EXPIRED"},
{1030, "EV_INTER_DIGIT_TIMER_EXPIRED"},
{0, NULL}
};
static value_string_ext actrace_cas_event_vals_ext = VALUE_STRING_EXT_INIT(actrace_cas_event_vals);
#define SEND_CAS 2
#define SEND_EVENT 3
#define CHANGE_COLLECT_TYPE 13
#define SEND_MF 8
#define SEND_DEST_NUM 4
static const value_string actrace_cas_function_vals[] = {
{ 0, "NILL"},
{ 1, "SET_TIMER"},
{ SEND_CAS, "SEND_CAS"},
{ SEND_EVENT, "SEND_EVENT"},
{ SEND_DEST_NUM, "SEND_DEST_NUM"},
{ 5, "DEL_TIMER"},
{ 6, "START_COLLECT"},
{ 7, "STOP_COLLECT"},
{ SEND_MF, "SEND_MF"},
{ 9, "STOP_DIAL_MF"},
{10, "SET_COUNTER"},
{11, "DEC_COUNTER"},
{12, "SEND_PROG_TON"},
{CHANGE_COLLECT_TYPE, "CHANGE_COLLECT_TYPE"},
{14, "GENERATE_CAS_EV"},
{0, NULL}
};
static value_string_ext actrace_cas_function_vals_ext = VALUE_STRING_EXT_INIT(actrace_cas_function_vals);
static const value_string actrace_cas_pstn_event_vals[] = {
{ 64, "acEV_PSTN_INTERNAL_ERROR"},
{ 65, "acEV_PSTN_CALL_CONNECTED"},
{ 66, "acEV_PSTN_INCOMING_CALL_DETECTED"},
{ 67, "acEV_PSTN_CALL_DISCONNECTED"},
{ 68, "acEV_PSTN_CALL_RELEASED"},
{ 69, "acEV_PSTN_REMOTE_ALERTING"},
{ 70, "acEV_PSTN_STARTED"},
{ 71, "acEV_PSTN_WARNING"},
{ 72, "acEV_ISDN_PROGRESS_INDICATION"},
{ 73, "acEV_PSTN_PROCEEDING_INDICATION"},
{ 74, "acEV_PSTN_ALARM"},
{ 75, "acEV_RESERVED"},
{ 76, "acEV_PSTN_LINE_INFO"},
{ 77, "acEV_PSTN_LOOP_CONFIRM"},
{ 78, "acEV_PSTN_RESTART_CONFIRM"},
{ 84, "acEV_ISDN_SETUP_ACK_IN"},
{ 85, "acEV_PSTN_CALL_INFORMATION"},
{128, "acEV_CAS_SEIZURE_DETECTED"},
{129, "acEV_CAS_CHANNEL_BLOCKED"},
{130, "acEV_CAS_PROTOCOL_STARTED"},
{131, "acEV_PSTN_CALL_STATE_RESPONSE"},
{132, "acEV_CAS_SEIZURE_ACK"},
{0, NULL}
};
static value_string_ext actrace_cas_pstn_event_vals_ext = VALUE_STRING_EXT_INIT(actrace_cas_pstn_event_vals);
static const value_string actrace_cas_collect_type_vals[] = {
{0, "COLLECT_TYPE_ADDRESS"},
{1, "COLLECT_TYPE_ANI"},
{2, "COLLECT_TYPE_SOURCE_CATEGORY"},
{3, "COLLECT_TYPE_LINE_CATEGORY"},
{0, NULL}
};
#define SEND_TYPE_ADDRESS 1
#define SEND_TYPE_SPECIFIC 2
#define SEND_TYPE_INTER_EXCHANGE_SWITCH 3
#define SEND_TYPE_ANI 4
#define SEND_TYPE_SOURCE_CATEGORY 5
#define SEND_TYPE_TRANSFER_CAPABILITY 6
static const value_string actrace_cas_send_type_vals[] = {
{SEND_TYPE_ADDRESS, "ADDRESS"},
{SEND_TYPE_SPECIFIC, "SPECIFIC"},
{SEND_TYPE_INTER_EXCHANGE_SWITCH, "INTER_EXCHANGE_SWITCH"},
{SEND_TYPE_ANI, "ANI"},
{SEND_TYPE_SOURCE_CATEGORY, "SOURCE_CATEGORY"},
{SEND_TYPE_TRANSFER_CAPABILITY, "TRANSFER_CAPABILITY"},
{0, NULL}
};
static const value_string actrace_cas_cause_vals[] = {
{ 1, "UNASSIGNED_NUMBER"},
{ 2, "NO_ROUTE_TO_TRANSIT_NET"},
{ 3, "NO_ROUTE_TO_DESTINATION"},
{ 6, "CHANNEL_UNACCEPTABLE"},
{ 7, "CALL_AWARDED_AND"},
{ 8, "PREEMPTION"},
{ 16, "NORMAL_CALL_CLEAR"},
{ 17, "USER_BUSY"},
{ 18, "NO_USER_RESPONDING"},
{ 19, "NO_ANSWER_FROM_USER_ALERTED"},
{ 20, "ACCEPT_DONE"},
{ 21, "CALL_REJECTED"},
{ 22, "NUMBER_CHANGED"},
{ 26, "NON_SELECTED_USER_CLEARING"},
{ 27, "DEST_OUT_OF_ORDER"},
{ 28, "INVALID_NUMBER_FORMAT"},
{ 29, "FACILITY_REJECT"},
{ 30, "RESPONSE_TO_STATUS_ENQUIRY"},
{ 31, "NORMAL_UNSPECIFIED"},
{ 32, "CIRCUIT_CONGESTION"},
{ 33, "USER_CONGESTION"},
{ 34, "NO_CIRCUIT_AVAILABLE"},
{ 38, "NETWORK_OUT_OF_ORDER"},
{ 39, "PERM_FR_MODE_CONN_OUT_OF_S"},
{ 40, "PERM_FR_MODE_CONN_OPERATIONAL"},
{ 41, "NETWORK_TEMPORARY_FAILURE"},
{ 42, "NETWORK_CONGESTION"},
{ 43, "ACCESS_INFORMATION_DISCARDED"},
{ 44, "REQUESTED_CIRCUIT_NOT_AVAILABLE"},
{ 46, "PRECEDENCE_CALL_BLOCKED"},
{ 47, "RESOURCE_UNAVAILABLE_UNSPECIFIED"},
{ 49, "QUALITY_OF_SERVICE_UNAVAILABLE"},
{ 50, "REQUESTED_FAC_NOT_SUBSCRIBED"},
{ 53, "CUG_OUT_CALLS_BARRED"},
{ 55, "CUG_INC_CALLS_BARRED"},
{ 57, "BC_NOT_AUTHORIZED"},
{ 58, "BC_NOT_PRESENTLY_AVAILABLE"},
{ 62, "ACCES_INFO_SUBS_CLASS_INCONS"},
{ 63, "SERVICE_NOT_AVAILABLE"},
{ 65, "BC_NOT_IMPLEMENTED"},
{ 66, "CHANNEL_TYPE_NOT_IMPLEMENTED"},
{ 69, "REQUESTED_FAC_NOT_IMPLEMENTED"},
{ 70, "ONLY_RESTRICTED_INFO_BEARER"},
{ 79, "SERVICE_NOT_IMPLEMENTED_UNSPECIFIED"},
{ 81, "INVALID_CALL_REF"},
{ 82, "IDENTIFIED_CHANNEL_NOT_EXIST"},
{ 83, "SUSPENDED_CALL_BUT_CALL_ID_NOT_EXIST"},
{ 84, "CALL_ID_IN_USE"},
{ 85, "NO_CALL_SUSPENDED"},
{ 86, "CALL_HAVING_CALL_ID_CLEARED"},
{ 87, "NOT_CUG_MEMBER"},
{ 88, "INCOMPATIBLE_DESTINATION"},
{ 90, "CUG_NON_EXISTENT"},
{ 91, "INVALID_TRANSIT_NETWORK_SELECTION"},
{ 95, "INVALID_MESSAGE_UNSPECIFIED"},
{ 96, "MANDATORY_IE_MISSING"},
{ 97, "MESSAGE_TYPE_NON_EXISTENT"},
{ 98, "MESSAGE_STATE_INCONSISTENCY"},
{ 99, "NON_EXISTENT_IE"},
{100, "INVALID_IE_CONTENT"},
{101, "MESSAGE_NOT_COMPATIBLE"},
{102, "RECOVERY_ON_TIMER_EXPIRY"},
{111, "PROTOCOL_ERROR_UNSPECIFIED"},
{127, "INTERWORKING_UNSPECIFIED"},
{128, "ACU_CAUSE_ACU_BAD_ADDRESS"},
{129, "ACU_CAUSE_ACU_BAD_SERVICE"},
{130, "ACU_CAUSE_ACU_COLLISION"},
{131, "ACU_CAUSE_ACU_FAC_REJECTED"},
{200, "C_ALREADY_BLOCKED"},
{201, "C_CHANNEL_BLOCKED"},
{202, "C_BLOCKING_DONE"},
{203, "C_ALREADY_UNBLOCKED"},
{204, "C_UNBLOCKING_DONE"},
{255, "ACU_NETWORK_CAUSE_NIL"},
{260, "CLRN_MFRn_A4"},
{261, "CLRN_MFRn_B1"},
{262, "CLRN_MFRn_B2"},
{263, "CLRN_MFRn_B3"},
{264, "CLRN_MFRn_B4"},
{265, "CLRN_MFRn_B5"},
{266, "CLRN_MFRn_B6"},
{267, "CLRN_MFRn_B7"},
{268, "CLRN_MFRn_B8"},
{269, "CLRN_MFRn_B9"},
{270, "CLRN_MFRn_B10"},
{271, "CLRN_MFRn_B11"},
{272, "CLRN_MFRn_B12"},
{273, "CLRN_MFRn_B13"},
{274, "CLRN_MFRn_B14"},
{275, "CLRN_MFRn_B15"},
{300, "ACURC_BUSY"},
{301, "ACURC_NOPROCEED"},
{302, "ACURC_NOANSWER"},
{303, "ACURC_NOAUTOANSWER"},
{304, "ACURC_CONGESTED"},
{305, "ACURC_INCOMING"},
{306, "ACURC_NOLINE"},
{307, "ACURC_ERRNUM"},
{308, "ACURC_INHNUM"},
{309, "ACURC_2MNUM"},
{310, "ACURC_HUNGUP"},
{311, "ACURC_NETWORK_ERROR"},
{312, "ACURC_TIMEOUT"},
{313, "ACURC_BAD_SERVICE"},
{314, "ACURC_INTERNAL"},
{315, "ACURC_OK"},
{316, "ACURC_BL_TIMEOUT"},
{317, "ACURC_IN_CALL"},
{318, "ACURC_CLEAR_RQ"},
{0, NULL}
};
static value_string_ext actrace_cas_cause_vals_ext = VALUE_STRING_EXT_INIT(actrace_cas_cause_vals);
/* ISDN */
#define PSTN_TO_BLADE 0x49446463
#define BLADE_TO_PSTN 0x49644443
static const value_string actrace_isdn_direction_vals[] = {
{PSTN_TO_BLADE, "Blade <-- PSTN"},
{BLADE_TO_PSTN, "Blade --> PSTN"},
{0, NULL}
};
/*
* Define the tree for actrace
*/
static int ett_actrace = -1;
/*
* Define the tap for actrace
*/
static int actrace_tap = -1;
static actrace_info_t *actrace_pi;
/* Some basic utility functions that are specific to this dissector */
static int is_actrace(tvbuff_t *tvb, gint offset);
/*
* The dissect functions
*/
static void dissect_actrace_cas(tvbuff_t *tvb, packet_info *pinfo, proto_tree *actrace_tree);
static void dissect_actrace_isdn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *actrace_tree);
/************************************************************************
* dissect_actrace - The dissector for the AudioCodes Trace prtocol
************************************************************************/
static int dissect_actrace(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *actrace_tree;
proto_item *ti;
int actrace_protocol;
/* Initialize variables */
actrace_tree = NULL;
/*
* Check to see whether we're really dealing with AC trace by looking
* for a valid "source" and fixed len for CAS, and the direction for ISDN.
* This isn't infallible, but it's cheap and it's better than nothing.
*/
actrace_protocol = is_actrace(tvb, 0);
if (actrace_protocol != NOT_ACTRACE)
{
/*
* Set the columns now, so that they'll be set correctly if we throw
* an exception. We can set them later as well....
*/
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AC_TRACE");
col_clear(pinfo->cinfo, COL_INFO);
if (tree)
{
/* Create our actrace subtree */
ti = proto_tree_add_item(tree,proto_actrace,tvb,0,-1, ENC_NA);
actrace_tree = proto_item_add_subtree(ti, ett_actrace);
}
switch (actrace_protocol)
{
case ACTRACE_CAS:
dissect_actrace_cas(tvb, pinfo, actrace_tree);
break;
case ACTRACE_ISDN:
dissect_actrace_isdn(tvb, pinfo, tree, actrace_tree);
break;
}
return tvb_captured_length(tvb);
}
return 0;
}
/* Dissect an individual actrace CAS message */
static void dissect_actrace_cas(tvbuff_t *tvb, packet_info *pinfo, proto_tree *actrace_tree)
{
/* Declare variables */
gint32 value, function, trunk, bchannel, source, event, curr_state, next_state;
gint32 par0, par1, par2;
const gchar *frame_label = NULL;
int direction = 0;
int offset = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AC_CAS");
value = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_time, tvb, offset, 4, value);
offset += 4;
source = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_source, tvb, offset, 4, source);
offset += 4;
curr_state = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_current_state, tvb, offset, 4, curr_state);
offset += 4;
event = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_event, tvb, offset, 4, event);
offset += 4;
next_state = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_next_state, tvb, offset, 4, next_state);
offset += 4;
function = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_function, tvb, offset, 4, function);
offset += 4;
col_append_fstr(pinfo->cinfo, COL_INFO, "%s|%d|%s|%d|%s|",
val_to_str_const(source, actrace_cas_source_vals_short, "ukn"),
curr_state,
val_to_str_ext(event, &actrace_cas_event_vals_ext, "%d"),
next_state,
val_to_str_ext(function, &actrace_cas_function_vals_ext, "%d"));
par0 = tvb_get_ntohl(tvb, offset);
switch (function)
{
case SEND_EVENT:
proto_tree_add_int_format_value(actrace_tree, hf_actrace_cas_par0, tvb, offset, 4,
par0, "%s", val_to_str_ext(par0, &actrace_cas_pstn_event_vals_ext, "Unknown (%d)"));
col_append_fstr(pinfo->cinfo, COL_INFO, "%s|",
val_to_str_ext(par0, &actrace_cas_pstn_event_vals_ext, "%d"));
break;
case CHANGE_COLLECT_TYPE:
proto_tree_add_int_format_value(actrace_tree, hf_actrace_cas_par0, tvb, offset, 4,
par0, "%s", val_to_str(par0, actrace_cas_collect_type_vals, "Unknown (%d)"));
col_append_fstr(pinfo->cinfo, COL_INFO, "%s|",
val_to_str(par0, actrace_cas_collect_type_vals, "%d"));
break;
case SEND_MF:
case SEND_DEST_NUM:
proto_tree_add_int_format_value(actrace_tree, hf_actrace_cas_par0, tvb, offset, 4,
par0, "%s", val_to_str(par0, actrace_cas_send_type_vals, "Unknown (%d)"));
col_append_fstr(pinfo->cinfo, COL_INFO, "%s|",
val_to_str(par0, actrace_cas_send_type_vals, "%d"));
break;
default:
proto_tree_add_int(actrace_tree, hf_actrace_cas_par0, tvb, offset, 4, par0);
col_append_fstr(pinfo->cinfo, COL_INFO, "%d|", par0);
}
offset += 4;
par1 = tvb_get_ntohl(tvb, offset);
if (function == SEND_EVENT) {
proto_tree_add_int_format_value(actrace_tree, hf_actrace_cas_par1, tvb, offset, 4,
par1, "%s", val_to_str_ext(par1, &actrace_cas_cause_vals_ext, "Unknown (%d)"));
col_append_fstr(pinfo->cinfo, COL_INFO, "%s|",
val_to_str_ext(par1, &actrace_cas_cause_vals_ext, "%d"));
} else {
proto_tree_add_int(actrace_tree, hf_actrace_cas_par1, tvb, offset, 4, par1);
col_append_fstr(pinfo->cinfo, COL_INFO, "%d|", par1);
}
offset += 4;
par2 = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_par2, tvb, offset, 4, par2);
col_append_fstr(pinfo->cinfo, COL_INFO, "%d|", par2);
offset += 4;
trunk = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_trunk, tvb, offset, 4, trunk);
offset += 4;
bchannel = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_bchannel, tvb, offset, 4, bchannel);
offset += 4;
col_prepend_fstr(pinfo->cinfo, COL_INFO, "t%db%d|", trunk, bchannel);
value = tvb_get_ntohl(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_cas_connection_id, tvb, offset, 4, value);
/* Add tap info for the Voip Graph */
if (source == ACTRACE_CAS_SOURCE_DSP) {
direction = 1;
if ( (event >= ACTRACE_CAS_EV_11) && (event <= ACTRACE_CAS_EV_00 ) ) {
frame_label = wmem_strdup_printf(pinfo->pool, "AB: %s", val_to_str_const(event, actrace_cas_event_ab_vals, "ERROR") );
} else if ( (event >= 32) && (event <= 46 ) ) { /* is an MF tone */
frame_label = wmem_strdup_printf(pinfo->pool, "MF: %s", val_to_str_ext_const(event, &actrace_cas_mf_vals_ext, "ERROR") );
} else if ( (event == ACTRACE_CAS_EV_DTMF ) || (event == ACTRACE_CAS_EV_FIRST_DIGIT ) ) { /* DTMF digit */
frame_label = wmem_strdup_printf(pinfo->pool, "DTMF: %u", par0 );
}
} else if (source == ACTRACE_CAS_SOURCE_TABLE) {
direction = 0;
if (function == SEND_MF) {
if (par0 == SEND_TYPE_SPECIFIC ) {
frame_label = wmem_strdup_printf(pinfo->pool, "MF: %u", par1);
} else if (par0 == SEND_TYPE_ADDRESS ) {
frame_label = wmem_strdup(pinfo->pool, "MF: DNIS digit");
} else if (par0 == SEND_TYPE_ANI ) {
frame_label = wmem_strdup(pinfo->pool, "MF: ANI digit");
} else if (par0 == SEND_TYPE_SOURCE_CATEGORY ) {
frame_label = wmem_strdup(pinfo->pool, "MF: src_category");
} else if (par0 == SEND_TYPE_TRANSFER_CAPABILITY ) {
frame_label = wmem_strdup(pinfo->pool, "MF: trf_capability");
} else if (par0 == SEND_TYPE_INTER_EXCHANGE_SWITCH ) {
frame_label = wmem_strdup(pinfo->pool, "MF: inter_exch_sw");
}
} else if (function == SEND_CAS) {
frame_label = wmem_strdup_printf(pinfo->pool, "AB: %s", val_to_str_const(ACTRACE_CAS_EV_00-par0, actrace_cas_event_ab_vals, "ERROR"));
} else if (function == SEND_DEST_NUM) {
if (par0 == SEND_TYPE_ADDRESS ) {
frame_label = wmem_strdup(pinfo->pool, "DTMF/MF: sending DNIS");
} else if (par0 == SEND_TYPE_ANI ) {
frame_label = wmem_strdup(pinfo->pool, "DTMF/MF: sending ANI");
}
}
}
if (frame_label != NULL) {
/* Initialise packet info for passing to tap */
actrace_pi = wmem_new(pinfo->pool, actrace_info_t);
actrace_pi->type = ACTRACE_CAS;
actrace_pi->direction = direction;
actrace_pi->trunk = trunk;
actrace_pi->cas_bchannel = bchannel;
actrace_pi->cas_frame_label = frame_label;
/* Report this packet to the tap */
tap_queue_packet(actrace_tap, pinfo, actrace_pi);
}
}
/* Dissect an individual actrace ISDN message */
static void dissect_actrace_isdn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *actrace_tree)
{
/* Declare variables */
gint len;
gint32 value, trunk;
tvbuff_t *next_tvb;
int offset = 0;
struct isdn_phdr isdn;
offset += 4;
value = tvb_get_ntohl(tvb, offset+4);
proto_tree_add_int(actrace_tree, hf_actrace_isdn_direction, tvb, offset, 4, value);
offset += 4;
/* PSTN = Network */
isdn.uton = (value==BLADE_TO_PSTN);
isdn.channel = 0; /* D channel */
trunk = tvb_get_ntohs(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_isdn_trunk, tvb, offset, 2, trunk);
offset += 4;
offset += 32;
len = tvb_get_ntohs(tvb, offset);
proto_tree_add_int(actrace_tree, hf_actrace_isdn_length, tvb, offset, 2, len);
/* if it is a q931 packet (we don't want LAPD packets for Voip Graph) add tap info */
if (len > 4) {
/* Initialise packet info for passing to tap */
actrace_pi = wmem_new(pinfo->pool, actrace_info_t);
actrace_pi->type = ACTRACE_ISDN;
actrace_pi->direction = (value==PSTN_TO_BLADE?1:0);
actrace_pi->trunk = trunk;
/* Report this packet to the tap */
tap_queue_packet(actrace_tap, pinfo, actrace_pi);
}
/* Dissect lapd payload */
offset += 2 ;
next_tvb = tvb_new_subset_length(tvb, offset, len);
call_dissector_with_data(lapd_phdr_handle, next_tvb, pinfo, tree, &isdn);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AC_ISDN");
col_prepend_fstr(pinfo->cinfo, COL_INFO, "Trunk:%d Blade %s PSTN "
, trunk, value==PSTN_TO_BLADE?"<--":"-->");
}
/*
* is_actrace - A function for determining whether there is a
* AudioCodes packet at offset in tvb. The packet could be
* a CAS, ISDN or other Trunk protocol. Here we are only
* trying to decode CAS or ISDN protocols
*
* Parameter:
* tvb - The tvbuff in which we are looking for
* offset - The offset in tvb at which we are looking for
*
* Return: NOT_ACTRACE if there isn't an AudioCodes trace packet at offset
* in tvb, ACTRACE_CAS if there's a CAS packet there, ACTRACE_ISDN if
* there's an ISDN packet there.
*/
static int is_actrace(tvbuff_t *tvb, gint offset)
{
gint tvb_len;
gint32 source, isdn_header;
tvb_len = tvb_reported_length(tvb);
/* is a CAS packet?
* the CAS messages are 48 byte fixed and the source should be 0,1 or 2 (DSP, User or Table)
*/
source = tvb_get_ntohl(tvb, offset+4);
if ( (tvb_len == 48) && ((source > -1) && (source <3)) )
return ACTRACE_CAS;
/* is ISDN packet?
* the ISDN packets have 0x49446463 for packets from PSTN to the Blade and
* 0x49644443 for packets from the Blade to the PSTN at offset 4
*/
isdn_header = tvb_get_ntohl(tvb, offset+4);
if ( (tvb_len >= 50) && ( (isdn_header == PSTN_TO_BLADE) || (isdn_header == BLADE_TO_PSTN)) )
return ACTRACE_ISDN;
return NOT_ACTRACE;
}
/* Register all the bits needed with the filtering engine */
void proto_register_actrace(void)
{
static hf_register_info hf[] =
{
/* CAS */
{ &hf_actrace_cas_time,
{ "Time", "actrace.cas.time", FT_INT32, BASE_DEC, NULL, 0x0,
"Capture Time", HFILL }},
{ &hf_actrace_cas_source,
{ "Source", "actrace.cas.source", FT_INT32, BASE_DEC, VALS(actrace_cas_source_vals), 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_current_state,
{ "Current State", "actrace.cas.curr_state", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_event,
{ "Event", "actrace.cas.event", FT_INT32, BASE_DEC|BASE_EXT_STRING, &actrace_cas_event_vals_ext, 0x0,
"New Event", HFILL }},
{ &hf_actrace_cas_next_state,
{ "Next State", "actrace.cas.next_state", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_function,
{ "Function", "actrace.cas.function", FT_INT32, BASE_DEC|BASE_EXT_STRING, &actrace_cas_function_vals_ext, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_par0,
{ "Parameter 0", "actrace.cas.par0", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_par1,
{ "Parameter 1", "actrace.cas.par1", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_par2,
{ "Parameter 2", "actrace.cas.par2", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_trunk,
{ "Trunk Number", "actrace.cas.trunk", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_bchannel,
{ "BChannel", "actrace.cas.bchannel", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_cas_connection_id,
{ "Connection ID", "actrace.cas.conn_id", FT_INT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
/* ISDN */
{ &hf_actrace_isdn_trunk,
{ "Trunk Number", "actrace.isdn.trunk", FT_INT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_actrace_isdn_direction,
{ "Direction", "actrace.isdn.dir", FT_INT32, BASE_DEC, VALS(actrace_isdn_direction_vals), 0x0,
NULL, HFILL }},
{ &hf_actrace_isdn_length,
{ "Length", "actrace.isdn.length", FT_INT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
};
static gint *ett[] =
{
&ett_actrace,
};
module_t *actrace_module;
/* Register protocol */
proto_actrace = proto_register_protocol("AudioCodes Trunk Trace", "ACtrace", "actrace");
proto_register_field_array(proto_actrace, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register our configuration options */
actrace_module = prefs_register_protocol(proto_actrace, NULL);
prefs_register_obsolete_preference(actrace_module, "display_dissect_tree");
actrace_tap = register_tap("actrace");
}
/* The registration hand-off routine */
void proto_reg_handoff_actrace(void)
{
dissector_handle_t actrace_handle;
/* Get a handle for the LAPD-with-pseudoheader dissector. */
lapd_phdr_handle = find_dissector_add_dependency("lapd-phdr", proto_actrace);
actrace_handle = create_dissector_handle(dissect_actrace, proto_actrace);
dissector_add_uint_with_preference("udp.port", UDP_PORT_ACTRACE, actrace_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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