forked from osmocom/wireshark
1794 lines
43 KiB
C
1794 lines
43 KiB
C
/* packet-alcap.c
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* Routines for ALCAP (Q.2630.1) dissection
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* AAL type 2 signalling protocol - Capability set 1
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* 12/1999
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*
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* Copyright 2003, Michael Lum <mlum [AT] telostech.com>
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* In association with Telos Technology Inc.
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmodule.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include "epan/packet.h"
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#define ALCAP_MSG_HEADER_LEN 6
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#define ALCAP_PARM_HEADER_LEN 3
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#define ALCAP_SI 12
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#define EXTRANEOUS_DATA_CHECK(edc_len, edc_max_len) \
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if ((edc_len) > (edc_max_len)) \
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{ \
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proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
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curr_offset, (edc_len) - (edc_max_len), "Extraneous Data"); \
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}
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#define SHORT_DATA_CHECK(sdc_len, sdc_min_len) \
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if ((sdc_len) < (sdc_min_len)) \
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{ \
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proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
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curr_offset, (sdc_len), "Short Data (?)"); \
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return; \
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}
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#define EXACT_DATA_CHECK(edc_len, edc_eq_len) \
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if ((edc_len) != (edc_eq_len)) \
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{ \
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proto_tree_add_none_format(tree, hf_alcap_none, tvb, \
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curr_offset, (edc_len), "Unexpected Data Length"); \
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return; \
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}
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static const value_string msg_parm_strings[] = {
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{ 1, "Cause (CAU)" },
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{ 2, "Connection element identifier (CEID)" },
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{ 3, "Destination E.164 service endpoint address (ESEA)" },
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{ 4, "Destination NSAP service endpoint address (NSEA)" },
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{ 5, "Link characteristics (ALC)" },
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{ 6, "Originating signalling association identifier (OSAID)" },
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{ 7, "Served user generated reference (SUGR)" },
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{ 8, "Served user transport (SUT)" },
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{ 9, "Service specific information (audio) (SSIA)" },
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{ 10, "Service specific information (multirate) (SSIM)" },
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{ 11, "Service specific information (SAR-assured) (SSISA)" },
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{ 12, "Service specific information (SAR-unassured) (SSISU)" },
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{ 13, "Test connection identifier (TCI)" },
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{ 0, NULL },
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};
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#define NUM_PARMS (sizeof(msg_parm_strings)/sizeof(value_string))
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static char *alcap_proto_name = "AAL type 2 signalling protocol - Capability set 1 (Q.2630.1)";
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static char *alcap_proto_name_short = "ALCAP";
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/* Initialize the subtree pointers */
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static gint ett_alcap = -1;
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static gint ett_parm = -1;
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/* Initialize the protocol and registered fields */
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static int proto_alcap = -1;
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static int hf_alcap_msg_type = -1;
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static int hf_alcap_length = -1;
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static int hf_alcap_parm_id = -1;
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static int hf_alcap_none = -1;
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static int hf_alcap_dsaid = -1;
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static int hf_alcap_osaid = -1;
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static int hf_alcap_aal2_path_id = -1;
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static int hf_alcap_channel_id = -1;
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static int hf_alcap_organizational_unique_id = -1;
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static int hf_alcap_served_user_gen_ref = -1;
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static int hf_alcap_nsap_address = -1;
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static char bigbuf[1024];
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static char bigbuf2[1024];
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static dissector_handle_t data_handle;
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static packet_info *g_pinfo;
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static proto_tree *g_tree;
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#define FIELD_COMPATIBILITY 0
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#define FIELD_SIGNALLING_ASSOC_ID 1
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#define FIELD_AAL2_PATH_ID 2
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#define FIELD_CHANNEL_ID 3
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#define FIELD_ORGANIZATIONAL_UNIQUE_ID 4
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#define FIELD_AUDIO_SERVICE 5
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#define FIELD_MULTIRATE_SERVICE 6
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#define FIELD_SEG_REASSEMBLY_ASS 7
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#define FIELD_SEG_REASSEMBLY_UNASS 8
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#define FIELD_SERVED_USER_GEN_REF 9
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#define FIELD_MAX_CPS_SDU_BIT_RATE 10
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#define FIELD_AVG_CPS_SDU_BIT_RATE 11
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#define FIELD_MAX_CPS_SDU_SIZE 12
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#define FIELD_AVG_CPS_SDU_SIZE 13
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#define FIELD_NATURE_OF_ADDRESS 14
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#define FIELD_E164_ADDRESS 15
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#define FIELD_NSAP_ADDRESS 16
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#define FIELD_CAUSE_VALUE 17
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#define FIELD_DIAGNOSTICS 18
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#define FIELD_SERVED_USER_TRANSPORT 19
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static const char * field_strings[] = {
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"Compatibility",
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"Signalling association identifier",
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"AAL type 2 path identifier",
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"Channel identifier (CID)",
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"Organizational unique identifier (OUI)",
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"Audio service",
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"Multirate service",
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"Segmentation and reassembly (assured data transfer)",
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"Segmentation and reassembly (unassured data transfer)",
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"Served user generated reference",
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"Maximum CPS-SDU bit rate",
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"Average CPS-SDU bit rate",
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"Maximum CPS-SDU size",
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"Average CPS-SDU size",
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"Nature of address",
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"E.164 address",
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"NSAP address",
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"Cause value",
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"Diagnostics",
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"Served user transport"
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};
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#define NUM_FIELDS (sizeof(field_strings)/sizeof(char *))
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static gint ett_fields[NUM_FIELDS];
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static const value_string msg_type_strings[] = {
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{ 1, "Block confirm (BLC)" },
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{ 2, "Block request (BLO)" },
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{ 3, "Confusion (CFN)" },
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{ 4, "Establish confirm (ECF)" },
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{ 5, "Establish request (ERQ)" },
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{ 6, "Release confirm (RLC)" },
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{ 7, "Release request (REL)" },
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{ 8, "Reset confirm (RSC)" },
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{ 9, "Reset request (RES)" },
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{ 10, "Unblock confirm (UBC)" },
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{ 11, "Unblock request (UBL)" },
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{ 0, NULL },
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};
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/* FUNCTIONS */
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static gchar *
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my_match_strval(guint32 val, const value_string *vs, gint *idx)
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{
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gint i = 0;
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while (vs[i].strptr) {
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if (vs[i].value == val)
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{
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*idx = i;
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return(vs[i].strptr);
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}
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i++;
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}
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*idx = -1;
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return(NULL);
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}
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/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.1
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*/
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static void
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dis_field_compatibility(tvbuff_t *tvb, proto_tree *tree, guint32 *offset, gboolean message)
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{
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guint32 curr_offset;
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guint8 compat;
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proto_item *item;
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proto_tree *subtree;
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gchar *str = NULL;
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curr_offset = *offset;
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item =
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proto_tree_add_none_format(tree, hf_alcap_none, tvb,
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curr_offset, 1, "%s %s",
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message ? "Message" : "Parameter",
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field_strings[FIELD_COMPATIBILITY]);
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subtree = proto_item_add_subtree(item, ett_fields[FIELD_COMPATIBILITY]);
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compat = tvb_get_guint8(tvb, curr_offset);
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other_decode_bitfield_value(bigbuf, compat, 0x80, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : Reserved",
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bigbuf);
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other_decode_bitfield_value(bigbuf, compat, 0x40, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : Pass-on not possible - %s",
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bigbuf,
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(compat & 0x40) ? "Send notification" : "Do not send notification");
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switch ((compat & 0x30) >> 4)
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{
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case 0x00:
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str = "Pass on message or parameter (Release connection)";
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break;
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case 0x01:
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if (message)
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{
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str = "Discard parameter (Discard message)";
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}
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else
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{
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str = "Discard parameter";
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}
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break;
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case 0x02:
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str = "Discard message";
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break;
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case 0x03:
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str = "Release connection";
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break;
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}
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other_decode_bitfield_value(bigbuf, compat, 0x30, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : Pass-on not possible, instruction - %s",
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bigbuf,
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str);
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other_decode_bitfield_value(bigbuf, compat, 0x08, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : Reserved",
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bigbuf);
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other_decode_bitfield_value(bigbuf, compat, 0x04, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : General action - %s",
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bigbuf,
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(compat & 0x04) ? "Send notification" : "Do not send notification");
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switch (compat & 0x03)
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{
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case 0x00:
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str = "Pass on message or parameter";
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break;
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case 0x01:
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if (message)
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{
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str = "Discard parameter (Discard message)";
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}
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else
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{
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str = "Discard parameter";
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}
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break;
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case 0x02:
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str = "Discard message";
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break;
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case 0x03:
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str = "Release connection";
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break;
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}
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other_decode_bitfield_value(bigbuf, compat, 0x03, 8);
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proto_tree_add_text(subtree, tvb,
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curr_offset, 1,
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"%s : General action, instruction - %s",
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bigbuf,
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str);
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*offset += 1;
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}
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/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.2
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*/
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static void
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dis_field_signalling_assoc_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean destination)
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{
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guint32 curr_offset;
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guint32 value;
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curr_offset = *offset;
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#define FIELD_SIGNALLING_ASSOC_ID_LEN 4
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SHORT_DATA_CHECK(*len, FIELD_SIGNALLING_ASSOC_ID_LEN);
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value = tvb_get_ntohl(tvb, curr_offset);
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if (value && check_col(g_pinfo->cinfo, COL_INFO))
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col_append_fstr(g_pinfo->cinfo, COL_INFO, " SA: %u", value);
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if (destination)
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{
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proto_tree_add_uint_format(tree, hf_alcap_dsaid, tvb,
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curr_offset, FIELD_SIGNALLING_ASSOC_ID_LEN, value,
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"Destination signalling association identifier: %u%s",
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value,
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value ? "" : " (unknown)");
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}
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else
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{
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proto_tree_add_uint(tree, hf_alcap_osaid, tvb,
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curr_offset, FIELD_SIGNALLING_ASSOC_ID_LEN, value);
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}
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curr_offset += FIELD_SIGNALLING_ASSOC_ID_LEN;
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*len -= (curr_offset - *offset);
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*offset = curr_offset;
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}
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/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.3
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*/
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static void
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dis_field_aal2_path_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
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{
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guint32 curr_offset;
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guint32 value;
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curr_offset = *offset;
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#define FIELD_AAL2_PATH_ID_LEN 4
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SHORT_DATA_CHECK(*len, FIELD_AAL2_PATH_ID_LEN);
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value = tvb_get_ntohl(tvb, curr_offset);
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if (value && check_col(g_pinfo->cinfo, COL_INFO))
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col_append_fstr(g_pinfo->cinfo, COL_INFO, " PathId: %u", value);
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proto_tree_add_uint_format(tree, hf_alcap_aal2_path_id, tvb,
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curr_offset, FIELD_AAL2_PATH_ID_LEN, value,
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"AAL2 path identifier: %d%s",
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value,
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value ? "" : " (Null)");
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curr_offset += FIELD_AAL2_PATH_ID_LEN;
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*len -= (curr_offset - *offset);
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*offset = curr_offset;
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}
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/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.4
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*/
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static void
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dis_field_channel_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
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{
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guint32 curr_offset;
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guint8 oct;
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curr_offset = *offset;
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SHORT_DATA_CHECK(*len, 1);
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oct = tvb_get_guint8(tvb, curr_offset);
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if (oct && check_col(g_pinfo->cinfo, COL_INFO))
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col_append_fstr(g_pinfo->cinfo, COL_INFO, " CID: %u", oct);
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proto_tree_add_uint_format(tree, hf_alcap_channel_id, tvb,
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curr_offset, 1, oct,
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"Channel identifier (CID): %d%s",
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oct,
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oct ? "" : " (Null)");
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curr_offset++;
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*len -= (curr_offset - *offset);
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*offset = curr_offset;
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}
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|
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/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.5
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*/
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static void
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dis_field_organizational_unique_id(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
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{
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guint32 curr_offset;
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guint32 octs;
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curr_offset = *offset;
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#define FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN 3
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SHORT_DATA_CHECK(*len, FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN);
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octs = tvb_get_ntoh24(tvb, curr_offset);
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proto_tree_add_uint(tree, hf_alcap_organizational_unique_id, tvb,
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curr_offset, FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN, octs);
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curr_offset += FIELD_ORGANIZATIONAL_UNIQUE_ID_LEN;
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*len -= (curr_offset - *offset);
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*offset = curr_offset;
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}
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|
|
/*
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* Ref. ITU-T Q.2630.1 (12/1999)
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* Section 7.4.6
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*/
|
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static void
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dis_field_audio_service(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
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{
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guint32 curr_offset;
|
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guint32 value;
|
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guint8 oct;
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proto_item *item;
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proto_tree *subtree;
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gchar *str = NULL;
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curr_offset = *offset;
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|
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#define FIELD_AUDIO_SERVICE_LEN 5
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SHORT_DATA_CHECK(*len, FIELD_AUDIO_SERVICE_LEN);
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item =
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proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
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curr_offset, FIELD_AUDIO_SERVICE_LEN, field_strings[FIELD_AUDIO_SERVICE]);
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|
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subtree = proto_item_add_subtree(item, ett_fields[FIELD_AUDIO_SERVICE]);
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|
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oct = tvb_get_guint8(tvb, curr_offset);
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|
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switch ((oct & 0xc0) >> 6)
|
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{
|
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case 0x00: str = "Designates a profile specified by ITU-T Rec. I.366.2; ignore organizational unique identifier"; break;
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case 0x01: str = "Designates a profile specified by organizational unique identifier"; break;
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case 0x02: str = "Designates a custom profile; ignore organizational unique identifier"; break;
|
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case 0x03: str = "Reserved"; break;
|
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}
|
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|
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other_decode_bitfield_value(bigbuf, oct, 0xc0, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
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curr_offset, 1,
|
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"%s : Profile type, %s",
|
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bigbuf, str);
|
|
|
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other_decode_bitfield_value(bigbuf, oct, 0x3f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
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curr_offset, 1,
|
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"%s : Reserved",
|
|
bigbuf);
|
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|
|
curr_offset++;
|
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|
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oct = tvb_get_guint8(tvb, curr_offset);
|
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|
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proto_tree_add_text(subtree, tvb,
|
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curr_offset, 1,
|
|
"Profile identifier (%d)",
|
|
oct);
|
|
|
|
curr_offset++;
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x80, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : FRM, transport of frame mode data %s",
|
|
bigbuf,
|
|
(oct & 0x80) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x40, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : CMD, transport of circuit mode data (64 kbit/s) %s",
|
|
bigbuf,
|
|
(oct & 0x40) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x20, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : MF-R2, transport of multi-frequency R2 dialled digits %s",
|
|
bigbuf,
|
|
(oct & 0x20) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x10, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : MF-R1, transport of multi-frequency R1 dialled digits %s",
|
|
bigbuf,
|
|
(oct & 0x10) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x08, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : DTMF, transport of dual tone multi-frequency dialled digits %s",
|
|
bigbuf,
|
|
(oct & 0x08) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x04, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : CAS, transport of channel associated signalling %s",
|
|
bigbuf,
|
|
(oct & 0x04) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x02, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : FAX, transport of demodulated facsimile data %s",
|
|
bigbuf,
|
|
(oct & 0x02) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x01, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : A/mu-law, interpretation of generic PCM coding: %s-law",
|
|
bigbuf,
|
|
(oct & 0x01) ? "mu" : "A");
|
|
|
|
curr_offset++;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of frame mode data (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.7
|
|
*/
|
|
static void
|
|
dis_field_multirate_service(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_MULTIRATE_SERVICE_LEN 3
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_MULTIRATE_SERVICE_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_MULTIRATE_SERVICE_LEN, field_strings[FIELD_MULTIRATE_SERVICE]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_MULTIRATE_SERVICE]);
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x80, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : FRM, transport of frame mode data %s",
|
|
bigbuf,
|
|
(oct & 0x80) ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x60, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x1f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Multiplier (%d) for n x 64 kbit/s",
|
|
bigbuf,
|
|
oct & 0x1f);
|
|
|
|
curr_offset++;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of frame mode data (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.8
|
|
*/
|
|
static void
|
|
dis_field_seg_reassembly_ass(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_SEG_REASSEMBLY_ASS_LEN 14
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_SEG_REASSEMBLY_ASS_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_SEG_REASSEMBLY_ASS_LEN, field_strings[FIELD_SEG_REASSEMBLY_ASS]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_SEG_REASSEMBLY_ASS]);
|
|
|
|
value = tvb_get_ntoh24(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 3,
|
|
"Maximum length of SSSAR-SDU in the forward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 3;
|
|
|
|
value = tvb_get_ntoh24(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 3,
|
|
"Maximum length of SSSAR-SDU in the backward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 3;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of SSCOP-SDU in the forward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of SSCOP-SDU in the backward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of SSCOP-UU in the forward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"Maximum length of SSCOP-UU in the backward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.9
|
|
*/
|
|
static void
|
|
dis_field_seg_reassembly_unass(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_SEG_REASSEMBLY_UNASS_LEN 7
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_SEG_REASSEMBLY_UNASS_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_SEG_REASSEMBLY_UNASS_LEN, field_strings[FIELD_SEG_REASSEMBLY_UNASS]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_SEG_REASSEMBLY_UNASS]);
|
|
|
|
value = tvb_get_ntoh24(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 3,
|
|
"Maximum length of SSSAR-SDU in the forward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 3;
|
|
|
|
value = tvb_get_ntoh24(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 3,
|
|
"Maximum length of SSSAR-SDU in the backward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 3;
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x80, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : TED, transmission error detection %s",
|
|
bigbuf,
|
|
oct & 0x80 ? "enabled" : "disabled");
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
curr_offset++;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.10
|
|
*/
|
|
static void
|
|
dis_field_served_user_gen_ref(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_SERVED_USER_GEN_REF_LEN 4
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_SERVED_USER_GEN_REF_LEN);
|
|
|
|
value = tvb_get_ntohl(tvb, curr_offset);
|
|
|
|
if (value && check_col(g_pinfo->cinfo, COL_INFO))
|
|
col_append_fstr(g_pinfo->cinfo, COL_INFO, " SUGR: %u", value);
|
|
|
|
proto_tree_add_uint(tree, hf_alcap_served_user_gen_ref, tvb,
|
|
curr_offset, FIELD_SERVED_USER_GEN_REF_LEN, value);
|
|
|
|
curr_offset += FIELD_SERVED_USER_GEN_REF_LEN;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.11
|
|
*/
|
|
static void
|
|
dis_field_cps_sdu_bit_rate(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean maximum)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_CPS_SDU_BIT_RATE_LEN 4
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_CPS_SDU_BIT_RATE_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_CPS_SDU_BIT_RATE_LEN, field_strings[FIELD_MAX_CPS_SDU_BIT_RATE + (maximum ? 0 : 1)]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_MAX_CPS_SDU_BIT_RATE + (maximum ? 0 : 1)]);
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"CPS-SDU bit rate in the forward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
value = tvb_get_ntohs(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 2,
|
|
"CPS-SDU bit rate in the backward direction (%d)",
|
|
value);
|
|
|
|
curr_offset += 2;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.12
|
|
*/
|
|
static void
|
|
dis_field_cps_sdu_size(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean maximum)
|
|
{
|
|
guint32 curr_offset;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_CPS_SDU_SIZE_LEN 2
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_CPS_SDU_SIZE_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_CPS_SDU_SIZE_LEN, field_strings[FIELD_MAX_CPS_SDU_SIZE + (maximum ? 0 : 1)]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_MAX_CPS_SDU_SIZE + (maximum ? 0 : 1)]);
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1,
|
|
"CPS-SDU size in the forward direction (%d)",
|
|
oct);
|
|
|
|
curr_offset++;
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1,
|
|
"CPS-SDU size in the backward direction (%d)",
|
|
oct);
|
|
|
|
curr_offset++;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.13
|
|
*/
|
|
static void
|
|
dis_field_nature_of_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
guint32 value;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
gchar *str = NULL;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_NATURE_OF_ADDRESS_LEN 1
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_NATURE_OF_ADDRESS_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_NATURE_OF_ADDRESS_LEN, field_strings[FIELD_NATURE_OF_ADDRESS]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_NATURE_OF_ADDRESS]);
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x80, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
value = oct & 0x7f;
|
|
|
|
switch (value)
|
|
{
|
|
case 0x00: str = "spare"; break;
|
|
case 0x01: str = "subscriber number (national use)"; break;
|
|
case 0x02: str = "unknown (national use)"; break;
|
|
case 0x03: str = "national (significant) number"; break;
|
|
case 0x04: str = "international number"; break;
|
|
case 0x05: str = "network-specific number (national use)"; break;
|
|
default:
|
|
if ((value >= 0x06) && (value <= 0x6f)) { str = "spare"; break; }
|
|
else if ((value >= 0x70) && (value <= 0xfe)) { str = "reserved for national use"; break; }
|
|
else { str = "not given in spec. ???"; break; }
|
|
}
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Nature of address code, %s (%d)",
|
|
bigbuf,
|
|
str,
|
|
value);
|
|
|
|
curr_offset++;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.14
|
|
*/
|
|
static void
|
|
dis_field_e164_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
guint8 parm_len;
|
|
guint8 oct;
|
|
guint8 i;
|
|
|
|
curr_offset = *offset;
|
|
|
|
SHORT_DATA_CHECK(*len, 1);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, -1, field_strings[FIELD_E164_ADDRESS]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_E164_ADDRESS]);
|
|
|
|
parm_len = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_item_set_len(item, parm_len + 1);
|
|
|
|
proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
|
|
|
|
curr_offset++;
|
|
|
|
if (parm_len > 0)
|
|
{
|
|
i=0;
|
|
while (i < parm_len)
|
|
{
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0xf0, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
bigbuf2[i] = (oct & 0x0f) + 0x30;
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x0f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Digit %d of address (%d)",
|
|
bigbuf,
|
|
i+1,
|
|
oct & 0x0f);
|
|
|
|
curr_offset++;
|
|
i++;
|
|
}
|
|
|
|
bigbuf2[i] = '\0';
|
|
|
|
if (check_col(g_pinfo->cinfo, COL_INFO))
|
|
col_append_fstr(g_pinfo->cinfo, COL_INFO, " E164: %s", bigbuf2);
|
|
|
|
proto_item_append_text(item, " (%s)", bigbuf2);
|
|
}
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.15
|
|
*/
|
|
static void
|
|
dis_field_nsap_address(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_NSAP_ADDRESS_LEN 20
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_NSAP_ADDRESS_LEN);
|
|
|
|
proto_tree_add_item(tree, hf_alcap_nsap_address, tvb,
|
|
curr_offset, FIELD_NSAP_ADDRESS_LEN,FALSE);
|
|
|
|
curr_offset += FIELD_NSAP_ADDRESS_LEN;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.16
|
|
*/
|
|
static void
|
|
dis_field_cause_value(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean *compat)
|
|
{
|
|
guint32 curr_offset;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
gchar *str = NULL;
|
|
|
|
*compat = FALSE;
|
|
curr_offset = *offset;
|
|
|
|
#define FIELD_CAUSE_VALUE_LEN 2
|
|
|
|
SHORT_DATA_CHECK(*len, FIELD_CAUSE_VALUE_LEN);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, FIELD_CAUSE_VALUE_LEN, field_strings[FIELD_CAUSE_VALUE]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_CAUSE_VALUE]);
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0xfc, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
switch (oct & 0x3)
|
|
{
|
|
case 0x00: str = "ITU-T standardized coding as described in ITU-T Rec. Q.850 and Q.2610"; break;
|
|
case 0x01: str = "ISO/IEC standard"; break;
|
|
case 0x02: str = "national standard"; break;
|
|
case 0x03: str = "standard defined for the network (either public or private) present on the network side of the interface"; break;
|
|
}
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x03, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Coding standard, %s",
|
|
bigbuf,
|
|
str);
|
|
|
|
curr_offset++;
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x80, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Reserved",
|
|
bigbuf);
|
|
|
|
switch (oct & 0x7f)
|
|
{
|
|
case 1: str = "Unallocated (unassigned) number"; break;
|
|
case 3: str = "No route to destination"; break;
|
|
case 31: str = "Normal, unspecified"; break;
|
|
case 34: str = "No circuit/channel available"; break;
|
|
case 38: str = "Network out of order"; break;
|
|
case 41: str = "Temporary failure"; break;
|
|
case 42: str = "Switching equipment congestion"; break;
|
|
case 44: str = "Requested circuit/channel not available"; break;
|
|
case 47: str = "Resource unavailable, unspecified"; break;
|
|
case 93: str = "AAL parameters cannot be supported"; break;
|
|
case 95: str = "Invalid message, unspecified"; break;
|
|
case 96: str = "Mandatory information element is missing"; break;
|
|
case 97: str = "Message type non-existent or not implemented"; *compat = TRUE; break;
|
|
case 99: str = "Information element/parameter non-existent or not implemented"; *compat = TRUE; break;
|
|
case 100: str = "Invalid information element contents"; break;
|
|
case 102: str = "Recovery on timer expiry"; break;
|
|
case 110: str = "Message with unrecognized parameter, discarded"; *compat = TRUE; break;
|
|
default: str = "Unknown"; break;
|
|
}
|
|
|
|
other_decode_bitfield_value(bigbuf, oct, 0x7f, 8);
|
|
proto_tree_add_text(subtree, tvb,
|
|
curr_offset, 1,
|
|
"%s : Cause (%d), %s",
|
|
bigbuf,
|
|
oct & 0x7f,
|
|
str);
|
|
|
|
curr_offset++;
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.17
|
|
*/
|
|
static void
|
|
dis_field_diagnostics(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset, gboolean compat)
|
|
{
|
|
guint32 curr_offset;
|
|
guint8 oct;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
guint8 parm_len;
|
|
gchar *str = NULL;
|
|
gint idx;
|
|
guint8 i;
|
|
|
|
curr_offset = *offset;
|
|
|
|
SHORT_DATA_CHECK(*len, 1);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, -1, field_strings[FIELD_DIAGNOSTICS]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_DIAGNOSTICS]);
|
|
|
|
parm_len = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_item_set_len(item, parm_len + 1);
|
|
|
|
proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
|
|
|
|
curr_offset++;
|
|
|
|
if (parm_len > 0)
|
|
{
|
|
if (compat)
|
|
{
|
|
/*
|
|
* compatibility diagnostics
|
|
*/
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
str = my_match_strval(oct, msg_type_strings, &idx);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1, (str == NULL) ? "Unknown message identifier" : str);
|
|
|
|
curr_offset++;
|
|
|
|
i=1;
|
|
while ((i+2) <= parm_len)
|
|
{
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
str = my_match_strval(oct, msg_parm_strings, &idx);
|
|
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1, (str == NULL) ? "Unknown parameter" : str);
|
|
|
|
curr_offset++;
|
|
|
|
oct = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
if (oct == 0)
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1, "Whole parameter");
|
|
}
|
|
else
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, 1, "Field number %d", oct);
|
|
}
|
|
|
|
curr_offset++;
|
|
i += 2;
|
|
}
|
|
|
|
if (i != parm_len)
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, parm_len - i, "Extraneous Data ???");
|
|
|
|
curr_offset += (parm_len - i);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, parm_len, "Coded as per ITU-T Rec. Q.2610");
|
|
|
|
curr_offset += parm_len;
|
|
}
|
|
}
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.4.18
|
|
*/
|
|
static void
|
|
dis_field_served_user_transport(tvbuff_t *tvb, proto_tree *tree, guint *len, guint32 *offset)
|
|
{
|
|
guint32 curr_offset;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
guint8 parm_len;
|
|
|
|
curr_offset = *offset;
|
|
|
|
SHORT_DATA_CHECK(*len, 1);
|
|
|
|
item =
|
|
proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, -1, field_strings[FIELD_SERVED_USER_TRANSPORT]);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_fields[FIELD_SERVED_USER_TRANSPORT]);
|
|
|
|
parm_len = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_item_set_len(item, parm_len + 1);
|
|
|
|
proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
|
|
|
|
curr_offset++;
|
|
|
|
if (parm_len > 0)
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none, tvb,
|
|
curr_offset, parm_len, "Value");
|
|
|
|
curr_offset += parm_len;
|
|
}
|
|
|
|
*len -= (curr_offset - *offset);
|
|
*offset = curr_offset;
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.1
|
|
*/
|
|
static void
|
|
dis_parm_cause(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
gboolean compat;
|
|
|
|
dis_field_cause_value(tvb, tree, &len, &curr_offset, &compat);
|
|
|
|
dis_field_diagnostics(tvb, tree, &len, &curr_offset, compat);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.2
|
|
*/
|
|
static void
|
|
dis_parm_conn_element_id(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_aal2_path_id(tvb, tree, &len, &curr_offset);
|
|
|
|
dis_field_channel_id(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.3
|
|
*/
|
|
static void
|
|
dis_parm_dest_e164_sea(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_nature_of_address(tvb, tree, &len, &curr_offset);
|
|
|
|
dis_field_e164_address(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.4
|
|
*/
|
|
static void
|
|
dis_parm_dest_nsap_sea(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_nsap_address(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.5
|
|
*/
|
|
static void
|
|
dis_parm_link_characteristics(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_cps_sdu_bit_rate(tvb, tree, &len, &curr_offset, TRUE);
|
|
|
|
dis_field_cps_sdu_bit_rate(tvb, tree, &len, &curr_offset, FALSE);
|
|
|
|
dis_field_cps_sdu_size(tvb, tree, &len, &curr_offset, TRUE);
|
|
|
|
dis_field_cps_sdu_size(tvb, tree, &len, &curr_offset, FALSE);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.6
|
|
*/
|
|
static void
|
|
dis_parm_osai(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_signalling_assoc_id(tvb, tree, &len, &curr_offset, FALSE);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.7
|
|
*/
|
|
static void
|
|
dis_parm_served_user_gen_ref(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_served_user_gen_ref(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.8
|
|
*/
|
|
static void
|
|
dis_parm_served_user_transport(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_served_user_transport(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.9
|
|
*/
|
|
static void
|
|
dis_parm_service_specific_info_audio(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_audio_service(tvb, tree, &len, &curr_offset);
|
|
|
|
dis_field_organizational_unique_id(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.10
|
|
*/
|
|
static void
|
|
dis_parm_service_specific_info_multirate(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_multirate_service(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.11
|
|
*/
|
|
static void
|
|
dis_parm_service_specific_info_ass(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_seg_reassembly_ass(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
/*
|
|
* Ref. ITU-T Q.2630.1 (12/1999)
|
|
* Section 7.3.12
|
|
*/
|
|
static void
|
|
dis_parm_service_specific_info_unass(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 curr_offset)
|
|
{
|
|
|
|
dis_field_seg_reassembly_unass(tvb, tree, &len, &curr_offset);
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
static gint ett_parms[NUM_PARMS];
|
|
static void (*alcap_parm_fcn[])(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 offset) = {
|
|
dis_parm_cause, /* Cause */
|
|
dis_parm_conn_element_id, /* Connection element identifier */
|
|
dis_parm_dest_e164_sea, /* Destination E.164 service endpoint address */
|
|
dis_parm_dest_nsap_sea, /* Destination NSAP service endpoint address */
|
|
dis_parm_link_characteristics, /* Link characteristics */
|
|
dis_parm_osai, /* Originating signalling association identifier */
|
|
dis_parm_served_user_gen_ref, /* Served user generated reference */
|
|
dis_parm_served_user_transport, /* Served user transport */
|
|
dis_parm_service_specific_info_audio, /* Service specific information (audio) */
|
|
dis_parm_service_specific_info_multirate, /* Service specific information (multirate) */
|
|
dis_parm_service_specific_info_ass, /* Service specific information (SAR-assured) */
|
|
dis_parm_service_specific_info_unass, /* Service specific information (SAR-unassured) */
|
|
NULL /* no parms */, /* Test connection identifier */
|
|
NULL, /* NONE */
|
|
};
|
|
|
|
/* GENERIC ALCAP DISSECTOR FUNCTIONS */
|
|
|
|
static void
|
|
dissect_alcap_parms(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint32 len)
|
|
{
|
|
void (*parm_fcn)(tvbuff_t *tvb, proto_tree *tree, guint len, guint32 offset) = NULL;
|
|
guint8 parm;
|
|
guint8 parm_len;
|
|
guint32 curr_offset, saved_offset;
|
|
gint idx;
|
|
gchar *str = NULL;
|
|
proto_item *item;
|
|
proto_tree *subtree;
|
|
gint ett_parm_idx;
|
|
|
|
|
|
curr_offset = offset;
|
|
|
|
while (len >= ALCAP_PARM_HEADER_LEN)
|
|
{
|
|
saved_offset = curr_offset;
|
|
|
|
parm = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
str = my_match_strval(parm, msg_parm_strings, &idx);
|
|
|
|
if (str == NULL)
|
|
{
|
|
ett_parm_idx = ett_parm;
|
|
parm_fcn = NULL;
|
|
}
|
|
else
|
|
{
|
|
ett_parm_idx = ett_parms[idx];
|
|
parm_fcn = alcap_parm_fcn[idx];
|
|
}
|
|
|
|
item = proto_tree_add_none_format(tree, hf_alcap_none, tvb,
|
|
curr_offset, -1,
|
|
(str == NULL) ? "Unknown parameter" : str);
|
|
|
|
subtree = proto_item_add_subtree(item, ett_parm_idx);
|
|
|
|
proto_tree_add_uint(subtree, hf_alcap_parm_id, tvb,
|
|
curr_offset, 1, parm);
|
|
|
|
curr_offset++;
|
|
|
|
dis_field_compatibility(tvb, subtree, &curr_offset, FALSE);
|
|
|
|
parm_len = tvb_get_guint8(tvb, curr_offset);
|
|
|
|
proto_tree_add_uint(subtree, hf_alcap_length, tvb, curr_offset, 1, parm_len);
|
|
|
|
curr_offset++;
|
|
|
|
proto_item_set_len(item, (curr_offset - saved_offset) + parm_len);
|
|
|
|
if (parm_len > 0)
|
|
{
|
|
if (parm_fcn == NULL)
|
|
{
|
|
proto_tree_add_none_format(subtree, hf_alcap_none,
|
|
tvb, curr_offset, parm_len, "Parameter data");
|
|
}
|
|
else
|
|
{
|
|
(*parm_fcn)(tvb, subtree, parm_len, curr_offset);
|
|
}
|
|
}
|
|
|
|
len -= (ALCAP_PARM_HEADER_LEN + parm_len);
|
|
curr_offset += parm_len;
|
|
}
|
|
|
|
EXTRANEOUS_DATA_CHECK(len, 0);
|
|
}
|
|
|
|
static void
|
|
dissect_alcap_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *alcap_tree)
|
|
{
|
|
guint32 temp_len;
|
|
guint32 len;
|
|
guint32 offset;
|
|
guint8 msg_type;
|
|
gint idx;
|
|
gchar *str = NULL;
|
|
|
|
offset = 0;
|
|
|
|
len = tvb_length(tvb);
|
|
temp_len = len;
|
|
|
|
if (len < ALCAP_MSG_HEADER_LEN)
|
|
{
|
|
proto_tree_add_none_format(alcap_tree, hf_alcap_none, tvb,
|
|
offset, len, "Message header too short");
|
|
|
|
return;
|
|
}
|
|
|
|
dis_field_signalling_assoc_id(tvb, alcap_tree, &temp_len, &offset, TRUE);
|
|
|
|
msg_type = tvb_get_guint8(tvb, offset);
|
|
|
|
str = my_match_strval(msg_type, msg_type_strings, &idx);
|
|
|
|
if (str == NULL)
|
|
{
|
|
proto_tree_add_none_format(alcap_tree, hf_alcap_none, tvb,
|
|
offset, 1, "Unknown message identifier");
|
|
|
|
return;
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_set_str(pinfo->cinfo, COL_INFO, str);
|
|
}
|
|
|
|
proto_tree_add_uint(alcap_tree, hf_alcap_msg_type, tvb,
|
|
offset, 1, msg_type);
|
|
|
|
offset++;
|
|
|
|
dis_field_compatibility(tvb, alcap_tree, &offset, TRUE);
|
|
|
|
if (len > ALCAP_MSG_HEADER_LEN)
|
|
{
|
|
dissect_alcap_parms(tvb, alcap_tree, offset, len - ALCAP_MSG_HEADER_LEN);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_alcap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *alcap_item;
|
|
proto_tree *alcap_tree = NULL;
|
|
|
|
g_pinfo = pinfo;
|
|
|
|
/*
|
|
* Don't change the Protocol column on summary display
|
|
*/
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
{
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, alcap_proto_name_short);
|
|
}
|
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
* necessary to generate protocol tree items.
|
|
*/
|
|
if (tree)
|
|
{
|
|
g_tree = tree;
|
|
|
|
/*
|
|
* create the ALCAP protocol tree
|
|
*/
|
|
alcap_item =
|
|
proto_tree_add_protocol_format(tree, proto_alcap, tvb, 0, -1,
|
|
alcap_proto_name);
|
|
|
|
alcap_tree =
|
|
proto_item_add_subtree(alcap_item, ett_alcap);
|
|
|
|
}
|
|
|
|
dissect_alcap_message(tvb, pinfo, alcap_tree);
|
|
|
|
}
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void
|
|
proto_register_alcap(void)
|
|
{
|
|
guint i;
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] =
|
|
{
|
|
{ &hf_alcap_msg_type,
|
|
{ "Message Type",
|
|
"alcap.msg_type",
|
|
FT_UINT8, BASE_DEC, VALS(msg_type_strings), 0,
|
|
"", HFILL }},
|
|
{ &hf_alcap_dsaid,
|
|
{ "Destination signalling association identifier",
|
|
"alcap.dsai",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_osaid,
|
|
{ "Originating signalling association identifier",
|
|
"alcap.osai",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_aal2_path_id,
|
|
{ "AAL2 path identifier",
|
|
"alcap.path_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_channel_id,
|
|
{ "Channel identifier (CID)",
|
|
"alcap.cid",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_organizational_unique_id,
|
|
{ "Organizational unique identifier (OUI)",
|
|
"alcap.oui",
|
|
FT_UINT24, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_served_user_gen_ref,
|
|
{ "Served user generated reference",
|
|
"alcap.sugr",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_nsap_address,
|
|
{ "NSAP address",
|
|
"alcap.nsap",
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_parm_id,
|
|
{ "Parameter identifier",
|
|
"alcap.param_id",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }},
|
|
{ &hf_alcap_length,
|
|
{ "Length", "alcap.len",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_alcap_none,
|
|
{ "Subtree", "alcap.none",
|
|
FT_NONE, 0, 0, 0,
|
|
"", HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
#define NUM_INDIVIDUAL_PARMS 2
|
|
static gint *ett[NUM_INDIVIDUAL_PARMS+NUM_PARMS+NUM_FIELDS];
|
|
|
|
memset((void *) ett, 0, sizeof(ett));
|
|
|
|
ett[0] = &ett_alcap;
|
|
ett[1] = &ett_parm;
|
|
|
|
for (i=0; i < NUM_PARMS; i++)
|
|
{
|
|
ett_parms[i] = -1;
|
|
ett[NUM_INDIVIDUAL_PARMS+i] = &ett_parms[i];
|
|
}
|
|
|
|
for (i=0; i < NUM_FIELDS; i++)
|
|
{
|
|
ett_fields[i] = -1;
|
|
ett[NUM_INDIVIDUAL_PARMS+NUM_PARMS+i] = &ett_fields[i];
|
|
}
|
|
|
|
/* Register the protocol name and description */
|
|
proto_alcap =
|
|
proto_register_protocol(alcap_proto_name, alcap_proto_name_short, "alcap");
|
|
|
|
register_dissector("alcap", dissect_alcap, proto_alcap);
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_alcap, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
|
|
void
|
|
proto_reg_handoff_alcap(void)
|
|
{
|
|
dissector_handle_t alcap_handle;
|
|
|
|
alcap_handle = create_dissector_handle(dissect_alcap, proto_alcap);
|
|
|
|
dissector_add("mtp3.service_indicator", ALCAP_SI, alcap_handle);
|
|
|
|
data_handle = find_dissector("data");
|
|
}
|