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|
/* packet-q932.c
* Routines for Q.932 packet dissection
* 2007 Tomas Kukosa
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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 <epan/packet.h>
#include <epan/prefs.h>
#include <epan/strutil.h>
#include <epan/emem.h>
#include <epan/asn1.h>
#include "packet-ber.h"
#include "packet-q932.h"
#define PNAME "Q.932"
#define PSNAME "Q932"
#define PFNAME "q932"
/* Initialize the protocol and registered fields */
int proto_q932 = -1;
static int hf_q932_ie_type = -1;
static int hf_q932_ie_len = -1;
static int hf_q932_ie_data = -1;
static int hf_q932_pp = -1;
static int hf_q932_nd = -1;
#include "packet-q932-hf.c"
/* Initialize the subtree pointers */
static gint ett_q932 = -1;
static gint ett_q932_ie = -1;
#include "packet-q932-ett.c"
/* Preferences */
/* ROSE context */
static rose_ctx_t q932_rose_ctx;
/* Subdissectors */
static dissector_handle_t data_handle = NULL;
static dissector_handle_t q932_ros_handle = NULL;
/* Gloabl variables */
#define Q932_IE_EXTENDED_FACILITY 0x0D
#define Q932_IE_FACILITY 0x1C
#define Q932_IE_NOTIFICATION_INDICATOR 0x27
#define Q932_IE_INFORMATION_REQUEST 0x32
#define Q932_IE_FEATURE_ACTIVATION 0x38
#define Q932_IE_FEATURE_INDICATION 0x39
#define Q932_IE_SERVICE_PROFILE_ID 0x3A
#define Q932_IE_ENDPOINT_IDENTIFIER 0x3B
static const value_string q932_str_ie_type[] = {
{ Q932_IE_EXTENDED_FACILITY , "Extended facility" },
{ Q932_IE_FACILITY , "Facility" },
{ Q932_IE_NOTIFICATION_INDICATOR, "Notification indicator" },
{ Q932_IE_INFORMATION_REQUEST, "Information request" },
{ Q932_IE_FEATURE_ACTIVATION , "Feature activation" },
{ Q932_IE_FEATURE_INDICATION , "Feature indication" },
{ Q932_IE_SERVICE_PROFILE_ID , "Service profile identification" },
{ Q932_IE_ENDPOINT_IDENTIFIER, "Endpoint identifier" },
{ 0, NULL}
};
static const value_string str_pp[] = {
{ 0x11 , "Remote Operations Protocol" },
{ 0x12 , "CMIP Protocol" },
{ 0x13 , "ACSE Protocol" },
{ 0x1F , "Networking extensions" },
{ 0, NULL}
};
static const value_string str_nd[] = {
{ 0x00 , "User suspended" },
{ 0x01 , "User resume" },
{ 0x02 , "Bearer service change" },
{ 0x04 , "Call completion delay" },
{ 0x03 , "Discriminator for extension to ASN.1 encoded component" },
{ 0x40 , "Discriminator for extension to ASN.1 encoded component for ISO" },
{ 0x42 , "Conference established" },
{ 0x43 , "Conference disconnected" },
{ 0x44 , "Other party added" },
{ 0x45 , "Isolated" },
{ 0x46 , "Reattached" },
{ 0x47 , "Other party isolated" },
{ 0x48 , "Other party reattached" },
{ 0x49 , "Other party split" },
{ 0x4A , "Other party disconnected" },
{ 0x4B , "Conference floating" },
{ 0x4C , "Conference disconnected, pre-emption" },
{ 0x4F , "Conference floating, served user pre-empted" },
{ 0x60 , "Call is a waiting call" },
{ 0x68 , "Diversion activated" },
{ 0x69 , "call transferred, alerting" },
{ 0x6A , "call transferred, answered" },
{ 0x6E , "reverse charging (whole call)" },
{ 0x6F , "reverse charging (for the rest of the call)" },
{ 0x74 , "service profile update" },
{ 0x79 , "Remote hold" },
{ 0x7A , "Remote retrieval" },
{ 0x7B , "Call is diverting" },
{ 0, NULL}
};
#include "packet-q932-fn.c"
/*--- dissect_q932_facility_ie -------------------------------------------------------*/
/*static*/ void
dissect_q932_facility_ie(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, int length) {
guint8 class;
gboolean pc;
guint32 tag;
guint32 len;
int hoffset, eoffset;
int ie_end;
tvbuff_t *next_tvb;
ie_end = offset + length;
proto_tree_add_item(tree, hf_q932_pp, tvb, offset, 1, FALSE);
offset++;
while (offset < ie_end) {
hoffset = offset;
offset = get_ber_identifier(tvb, offset, &class, &pc, &tag);
offset = get_ber_length(tvb, offset, &len, NULL);
eoffset = offset + len;
next_tvb = tvb_new_subset(tvb, hoffset, eoffset - hoffset, eoffset - hoffset);
switch (class) {
case BER_CLASS_CON:
switch (tag) {
case 10 : /* Network Facility Extension */
dissect_NetworkFacilityExtension_PDU(next_tvb, pinfo, tree);
break;
case 18 : /* Network Protocol Profile */
dissect_NetworkProtocolProfile_PDU(next_tvb, pinfo, tree);
break;
case 11 : /* Interpretation Component */
dissect_InterpretationComponent_PDU(next_tvb, pinfo, tree);
break;
/* ROSE APDU */
case 1 : /* invoke */
case 2 : /* returnResult */
case 3 : /* returnError */
case 4 : /* reject */
q932_rose_ctx.apdu_depth = 1;
pinfo->private_data = &q932_rose_ctx;
call_dissector(q932_ros_handle, next_tvb, pinfo, tree);
break;
/* DSE APDU */
case 12 : /* begin */
case 14 : /* end */
case 15 : /* continue */
case 17 : /* abort */
offset = dissect_ber_identifier(pinfo, tree, tvb, hoffset, NULL, NULL, NULL);
offset = dissect_ber_length(pinfo, tree, tvb, offset, NULL, NULL);
proto_tree_add_text(tree, tvb, offset, len, "DSE APDU (not supported)");
break;
default:
offset = dissect_ber_identifier(pinfo, tree, tvb, hoffset, NULL, NULL, NULL);
offset = dissect_ber_length(pinfo, tree, tvb, offset, NULL, NULL);
proto_tree_add_text(tree, tvb, offset, len, "Unknown Component");
}
break;
case BER_CLASS_APP:
switch (tag) {
/* ACSE APDU */
case 0 : /* aarq */
case 1 : /* aare */
case 2 : /* rlrq */
case 3 : /* rlre */
case 4 : /* abrt */
offset = dissect_ber_identifier(pinfo, tree, tvb, hoffset, NULL, NULL, NULL);
offset = dissect_ber_length(pinfo, tree, tvb, offset, NULL, NULL);
proto_tree_add_text(tree, tvb, offset, len, "ACSE APDU (not supported)");
break;
default:
offset = dissect_ber_identifier(pinfo, tree, tvb, hoffset, NULL, NULL, NULL);
offset = dissect_ber_length(pinfo, tree, tvb, offset, NULL, NULL);
proto_tree_add_text(tree, tvb, offset, len, "Unknown Component");
}
break;
default:
offset = dissect_ber_identifier(pinfo, tree, tvb, hoffset, NULL, NULL, NULL);
offset = dissect_ber_length(pinfo, tree, tvb, offset, NULL, NULL);
proto_tree_add_text(tree, tvb, offset, len, "Unknown Component");
}
offset = eoffset;
}
}
/*--- dissect_q932_ni_ie -------------------------------------------------------*/
static void
dissect_q932_ni_ie(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree, int length) {
int remain = length;
guint8 octet = 0;
guint32 value = 0;
while ((remain > 0) && !(octet & 0x80)) {
octet = tvb_get_guint8(tvb, offset++);
remain--;
value <<= 7;
value |= octet & 0x7F;
}
proto_tree_add_uint(tree, hf_q932_nd, tvb, offset - (length - remain), length - remain, value);
if (remain > 0) {
proto_tree_add_text(tree, tvb, offset - remain, remain, "ASN.1 Encoded Data Structure(NOT IMPLEMENTED): %s", tvb_bytes_to_str(tvb, offset - remain, remain));
}
}
/*--- dissect_q932_ie -------------------------------------------------------*/
static void
dissect_q932_ie(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
gint offset;
proto_item *ti, *ti_ie;
proto_tree *ie_tree;
guint8 ie_type, ie_len;
offset = 0;
ti = proto_tree_add_item(tree, proto_q932, tvb, offset, -1, FALSE);
PROTO_ITEM_SET_HIDDEN(ti);
ie_type = tvb_get_guint8(tvb, offset);
ie_len = tvb_get_guint8(tvb, offset + 1);
ti_ie = proto_tree_add_text(tree, tvb, offset, -1, "%s",
val_to_str(ie_type, VALS(q932_str_ie_type), "unknown (0x%02X)"));
ie_tree = proto_item_add_subtree(ti_ie, ett_q932_ie);
proto_tree_add_item(ie_tree, hf_q932_ie_type, tvb, offset, 1, FALSE);
proto_tree_add_item(ie_tree, hf_q932_ie_len, tvb, offset + 1, 1, FALSE);
offset += 2;
if (tvb_length_remaining(tvb, offset) <= 0)
return;
switch (ie_type) {
case Q932_IE_FACILITY :
dissect_q932_facility_ie(tvb, offset, pinfo, ie_tree, ie_len);
break;
case Q932_IE_NOTIFICATION_INDICATOR :
dissect_q932_ni_ie(tvb, offset, pinfo, ie_tree, ie_len);
break;
default:
if (ie_len > 0) {
if (tree) proto_tree_add_item(ie_tree, hf_q932_ie_data, tvb, offset, ie_len, FALSE);
}
}
}
/*--- dissect_q932_apdu -----------------------------------------------------*/
static void
dissect_q932_apdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
call_dissector(q932_ros_handle, tvb, pinfo, tree);
}
/*--- proto_register_q932 ---------------------------------------------------*/
void proto_register_q932(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_q932_ie_type, { "Type", "q932.ie.type",
FT_UINT8, BASE_HEX, VALS(q932_str_ie_type), 0x0,
"Information Element Type", HFILL }},
{ &hf_q932_ie_len, { "Length", "q932.ie.len",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Information Element Length", HFILL }},
{ &hf_q932_ie_data, { "Data", "q932.ie.data",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Data", HFILL }},
{ &hf_q932_pp, { "Protocol profile", "q932.pp",
FT_UINT8, BASE_HEX, VALS(str_pp), 0x1F,
"Protocol profile", HFILL }},
{ &hf_q932_nd, { "Notification description", "q932.nd",
FT_UINT8, BASE_HEX, VALS(str_nd), 0x0,
"Notification description", HFILL }},
#include "packet-q932-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_q932,
&ett_q932_ie,
#include "packet-q932-ettarr.c"
};
/* Register protocol and dissector */
proto_q932 = proto_register_protocol(PNAME, PSNAME, PFNAME);
register_dissector("q932.apdu", dissect_q932_apdu, proto_q932);
/* Register fields and subtrees */
proto_register_field_array(proto_q932, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
rose_ctx_init(&q932_rose_ctx);
/* Register dissector tables */
q932_rose_ctx.arg_global_dissector_table = register_dissector_table("q932.ros.global.arg", "Q.932 Operation Argument (global opcode)", FT_STRING, BASE_NONE);
q932_rose_ctx.res_global_dissector_table = register_dissector_table("q932.ros.global.res", "Q.932 Operation Result (global opcode)", FT_STRING, BASE_NONE);
q932_rose_ctx.arg_local_dissector_table = register_dissector_table("q932.ros.local.arg", "Q.932 Operation Argument (local opcode)", FT_UINT32, BASE_HEX);
q932_rose_ctx.res_local_dissector_table = register_dissector_table("q932.ros.local.res", "Q.932 Operation Result (local opcode)", FT_UINT32, BASE_HEX);
q932_rose_ctx.err_global_dissector_table = register_dissector_table("q932.ros.global.err", "Q.932 Error (global opcode)", FT_STRING, BASE_NONE);
q932_rose_ctx.err_local_dissector_table = register_dissector_table("q932.ros.local.err", "Q.932 Error (local opcode)", FT_UINT32, BASE_HEX);
}
/*--- proto_reg_handoff_q932 ------------------------------------------------*/
void proto_reg_handoff_q932(void) {
dissector_handle_t q932_ie_handle;
q932_ie_handle = create_dissector_handle(dissect_q932_ie, proto_q932);
/* Facility */
dissector_add("q931.ie", (0x00 << 8) | Q932_IE_FACILITY, q932_ie_handle);
/* Notification indicator */
dissector_add("q931.ie", (0x00 << 8) | Q932_IE_NOTIFICATION_INDICATOR, q932_ie_handle);
q932_ros_handle = find_dissector("q932.ros");
data_handle = find_dissector("data");
}
/*---------------------------------------------------------------------------*/
|
