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/* packet-dect_nwk.c
*
* Dissector for the DECT (Digital Enhanced Cordless Telecommunications)
* NWK protocol layer as described in ETSI EN 300 175-5 V2.7.1 (2017-11)
*
* Copyright 2018 by Harald Welte <laforge@gnumonks.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
static int proto_dect_nwk = -1;
static gint hf_nwk_ti = -1;
static gint hf_nwk_pdisc = -1;
static gint hf_nwk_msg_type_lce = -1;
static gint hf_nwk_msg_type_cc = -1;
static gint hf_nwk_msg_type_mm = -1;
static gint ett_dect_nwk = -1;
static dissector_handle_t dect_nwk_handle;
/*********************************************************************************
* DECT DEFINITIONS
*********************************************************************************/
/* Section 7.2 */
enum dect_nwk_proto_disc {
DECT_NWK_PDISC_LCE = 0x0,
DECT_NWK_PDISC_CC = 0x3,
DECT_NWK_PDISC_CISS = 0x4,
DECT_NWK_PDISC_MM = 0x5,
DECT_NWK_PDISC_CMSS = 0x6,
DECT_NWK_PDISC_COMS = 0x7,
};
/* Section 7.4.1 */
enum dect_nwk_cc_msg_type {
DECT_NWK_CC_ALERTING = 0x01,
DECT_NWK_CC_CALL_PROC = 0x02,
DECT_NWK_CC_SETUP = 0x05,
DECT_NWK_CC_CONNECT = 0x07,
DECT_NWK_CC_SETUP_ACK = 0x0d,
DECT_NWK_CC_CONNECT_ACK = 0x0f,
DECT_NWK_CC_SERVICE_CHANGE = 0x20,
DECT_NWK_CC_SERVICE_ACCEPT = 0x21,
DECT_NWK_CC_SERVICE_REJECT = 0x23,
DECT_NWK_CC_RELEASE = 0x4d,
DECT_NWK_CC_RELEASE_COM = 0x5a,
DECT_NWK_CC_IWU_INFO = 0x60,
DECT_NWK_CC_NOTIFY = 0x6e,
DECT_NWK_CC_INFO = 0x7b,
};
/* Section 7.4.2 */
enum dect_nwk_ss_msg_type {
DECT_NWK_SS_CISS_RELEASE_COM = 0x5a,
DECT_NWK_SS_CISS_FACILITY = 0x62,
DECT_NWK_SS_CISS_REGISTER = 0x64,
DECT_NWK_SS_CRSS_HOLD = 0x24,
DECT_NWK_SS_CRSS_HOLD_ACK = 0x28,
DECT_NWK_SS_CRSS_HOLD_REJ = 0x30,
DECT_NWK_SS_CRSS_RETRIEVE = 0x31,
DECT_NWK_SS_CRSS_RETRIEVE_ACK = 0x33,
DECT_NWK_SS_CRSS_RETRIEVE_REJ = 0x37,
#define DECT_NWK_SS_CRSS_FACILITY DECT_NWK_SS_CISS_FACILITY
};
/* Section 7.4.3 */
enum dect_nwk_coms_msg_type {
DECT_NWK_COMS_SETUP = 0x05,
DECT_NWK_COMS_CONNECT = 0x07,
DECT_NWK_COMS_NOTIFY = 0x08,
DECT_NWK_COMS_RELEASE = 0x4d,
DECT_NWK_COMS_RELEASE_COM = 0x5a,
DECT_NWK_COMS_INFO = 0x7b,
DECT_NWK_COMS_ACK = 0x78,
};
/* Section 7.4.4 */
enum dect_nwk_clms_msg_type {
DECT_NWK_CLMS_VARIABLE = 0x01,
};
/* Section 7.4.5 */
enum dect_nwk_mm_msg_type {
DECT_NWK_MM_AUTH_REQ = 0x40,
DECT_NWK_MM_AUTH_REPLY = 0x41,
DECT_NWK_MM_KEY_ALLOC = 0x42,
DECT_NWK_MM_AUTH_REJ = 0x43,
DECT_NWK_MM_ACC_RIGHTS_REQ = 0x44,
DECT_NWK_MM_ACC_RIGHTS_ACK = 0x45,
DECT_NWK_MM_ACC_RIGHTS_REJ = 0x47,
DECT_NWK_MM_ACC_RIGHTS_TERM_REQ = 0x48,
DECT_NWK_MM_ACC_RIGHTS_TERM_ACK = 0x49,
DECT_NWK_MM_ACC_RIGHTS_TERM_REJ = 0x4b,
DECT_NWK_MM_CIPH_REQ = 0x4c,
DECT_NWK_MM_CIPH_SUGGEST = 0x4e,
DECT_NWK_MM_CIPH_REJ = 0x4f,
DECT_NWK_MM_INFO_REQ = 0x50,
DECT_NWK_MM_INFO_ACK = 0x51,
DECT_NWK_MM_INFO_SUGGEST = 0x52,
DECT_NWK_MM_INFO_REJ = 0x53,
DECT_NWK_MM_LOCATE_REQ = 0x54,
DECT_NWK_MM_LOCATE_ACK = 0x55,
DECT_NWK_MM_DETACH = 0x56,
DECT_NWK_MM_LOCATE_REJ = 0x57,
DECT_NWK_MM_ID_REQ = 0x58,
DECT_NWK_MM_ID_REPLY = 0x59,
DECT_NWK_MM_IWU = 0x5b,
DECT_NWK_MM_TID_ASSIGN = 0x5c,
DECT_NWK_MM_TID_ASSIGN_ACK = 0x5d,
DECT_NWK_MM_TID_ASSIGN_REJ = 0x5f,
DECT_NWK_MM_NOTIFY = 0x6e,
};
/* Section 7.4.6 */
enum dect_nwk_lce_msg_type {
DECT_NWK_LCE_PAGE_RESP = 0x71,
DECT_NWK_LCE_PAGE_REJ = 0x72,
};
/*********************************************************************************
* DECT VALUE STRINGS
*********************************************************************************/
/* Section 7.2 */
static const value_string nwk_pdisc_vals[] = {
{ DECT_NWK_PDISC_LCE, "Link Control Entity (LCE)" },
{ DECT_NWK_PDISC_CC, "Call Control (CC)" },
{ DECT_NWK_PDISC_CISS, "Call Independent Supplementary Services (CISS)" },
{ DECT_NWK_PDISC_MM, "Mobility Management (MM)" },
{ DECT_NWK_PDISC_CMSS, "ConnectionLess Message Service (CMSS)" },
{ DECT_NWK_PDISC_COMS, "Connection Oriented Message Service (COMS)" },
{ 0, NULL }
};
/* Section 7.4.1 */
static const value_string nwk_cc_msgt_vals[] = {
{ DECT_NWK_CC_ALERTING, "CC-ALERTING" },
{ DECT_NWK_CC_CALL_PROC, "CC-CALL-PROC" },
{ DECT_NWK_CC_SETUP, "CC-SETUP" },
{ DECT_NWK_CC_CONNECT, "CC-CONNECT" },
{ DECT_NWK_CC_SETUP_ACK, "CC-SETUP-ACK" },
{ DECT_NWK_CC_CONNECT_ACK, "CC-CONNECT-ACK" },
{ DECT_NWK_CC_SERVICE_CHANGE, "CC-SERVICE-CHANGE" },
{ DECT_NWK_CC_SERVICE_ACCEPT, "CC-SERVICE-ACCEPT" },
{ DECT_NWK_CC_SERVICE_REJECT, "CC-SERVICE-REJECT" },
{ DECT_NWK_CC_RELEASE, "CC-RELEASE" },
{ DECT_NWK_CC_RELEASE_COM, "CC-RELEASE-COM" },
{ DECT_NWK_CC_IWU_INFO, "CC-IWU-INFO" },
{ DECT_NWK_CC_NOTIFY, "CC-NOTIFY" },
{ DECT_NWK_CC_INFO, "CC-INFO" },
{ 0, NULL }
};
/* Section 7.4.5 */
static const value_string nwk_mm_msgt_vals[] = {
{ DECT_NWK_MM_AUTH_REQ, "MM-AUTH-REQ" },
{ DECT_NWK_MM_AUTH_REPLY, "MM-AUTH-REPLY" },
{ DECT_NWK_MM_KEY_ALLOC, "MM-KEY-ALLOC"},
{ DECT_NWK_MM_AUTH_REJ, "MM-AUTH-REJECT"},
{ DECT_NWK_MM_ACC_RIGHTS_REQ, "MM-ACC-RIGHTS-REQ"},
{ DECT_NWK_MM_ACC_RIGHTS_ACK, "MM-ACC-RIGHTS-ACK"},
{ DECT_NWK_MM_ACC_RIGHTS_REJ, "MM-ACC-RIGHTS-REJ"},
{ DECT_NWK_MM_ACC_RIGHTS_TERM_REQ, "MM-ACC-RIGHTS-TERM-REQ"},
{ DECT_NWK_MM_ACC_RIGHTS_TERM_ACK, "MM-ACC-RIGHTS-TERM-ACK"},
{ DECT_NWK_MM_ACC_RIGHTS_TERM_REJ, "MM-ACC-RIGHTS-TERM-REJ"},
{ DECT_NWK_MM_CIPH_REQ, "MM-CIPH-REQ"},
{ DECT_NWK_MM_CIPH_SUGGEST, "MM-CIPH-SUGGEST"},
{ DECT_NWK_MM_CIPH_REJ, "MM-CIPH-REJ"},
{ DECT_NWK_MM_INFO_REQ, "MM-INFO-REQ"},
{ DECT_NWK_MM_INFO_ACK, "MM-INFO-ACK"},
{ DECT_NWK_MM_INFO_SUGGEST, "MM-INFO-SUGGEST"},
{ DECT_NWK_MM_INFO_REJ, "MM-INFO-REJ"},
{ DECT_NWK_MM_LOCATE_REQ, "MM-LOCATE-REQ"},
{ DECT_NWK_MM_LOCATE_ACK, "MM-LOCATE-ACK"},
{ DECT_NWK_MM_DETACH, "MM-DETACH"},
{ DECT_NWK_MM_LOCATE_REJ, "MM-LOCATE-REJ"},
{ DECT_NWK_MM_ID_REQ, "MM-ID-REQ"},
{ DECT_NWK_MM_ID_REPLY, "MM-ID-REPLY"},
{ DECT_NWK_MM_IWU, "MM-IWU"},
{ DECT_NWK_MM_TID_ASSIGN, "MM-TID-ASSIGN"},
{ DECT_NWK_MM_TID_ASSIGN_ACK, "MM-TID-ASSIGN-ACK"},
{ DECT_NWK_MM_TID_ASSIGN_REJ, "MM-TID-ASSIGN-REJ"},
{ DECT_NWK_MM_NOTIFY, "MM-NOTIFY"},
{ 0, NULL }
};
/* Section 7.4.6 */
static const value_string nwk_lce_msgt_vals[] = {
{ DECT_NWK_LCE_PAGE_RESP, "LCE-PAGE-RESPONSE" },
{ DECT_NWK_LCE_PAGE_REJ, "LCE-PAGE-REJECT" },
{ 0, NULL }
};
/* TOOD: value_string for other protocols */
/*********************************************************************************
* DECT dissector code
*********************************************************************************/
static int dissect_dect_nwk_lce(tvbuff_t *tvb, guint8 msg_type, guint offset, packet_info *pinfo, proto_tree *tree, void _U_ *data)
{
proto_tree_add_item(tree, hf_nwk_msg_type_lce, tvb, offset, 1, ENC_NA);
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str(msg_type, nwk_lce_msgt_vals, "Unknown 0x%02x"));
offset++;
/* TOOD: dissection of TLVs/IEs */
return offset;
}
static int dissect_dect_nwk_cc(tvbuff_t *tvb, guint8 msg_type, guint offset, packet_info *pinfo, proto_tree *tree, void _U_ *data)
{
proto_tree_add_item(tree, hf_nwk_msg_type_cc, tvb, offset, 1, ENC_NA);
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str(msg_type, nwk_cc_msgt_vals, "Unknown 0x%02x"));
offset++;
/* TOOD: dissection of TLVs/IEs */
return offset;
}
static int dissect_dect_nwk_mm(tvbuff_t *tvb, guint8 msg_type, guint offset, packet_info *pinfo, proto_tree *tree, void _U_ *data)
{
proto_tree_add_item(tree, hf_nwk_msg_type_mm, tvb, offset, 1, ENC_NA);
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str(msg_type, nwk_mm_msgt_vals, "Unknown 0x%02x"));
offset++;
/* TOOD: dissection of TLVs/IEs */
return offset;
}
static int dissect_dect_nwk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
proto_tree *nwk_tree;
proto_item *nwk_ti;
guint8 pdisc, msg_type;
guint len;
guint offset = 0;
int available_length;
len = tvb_reported_length(tvb);
col_append_str(pinfo->cinfo, COL_INFO, "(NWK) ");
nwk_ti = proto_tree_add_item(tree, proto_dect_nwk, tvb, 0, len, ENC_NA);
nwk_tree = proto_item_add_subtree(nwk_ti, ett_dect_nwk);
proto_tree_add_item(nwk_tree, hf_nwk_ti, tvb, 0, 1, ENC_NA);
proto_tree_add_item(nwk_tree, hf_nwk_pdisc, tvb, 0, 1, ENC_NA);
pdisc = tvb_get_guint8(tvb, 0) & 0x0F;
msg_type = tvb_get_guint8(tvb, 1);
switch (pdisc) {
case DECT_NWK_PDISC_LCE:
offset = dissect_dect_nwk_lce(tvb, msg_type, 1, pinfo, nwk_tree, data);
break;
case DECT_NWK_PDISC_CC:
offset = dissect_dect_nwk_cc(tvb, msg_type, 1, pinfo, nwk_tree, data);
break;
case DECT_NWK_PDISC_MM:
offset = dissect_dect_nwk_mm(tvb, msg_type, 1, pinfo, nwk_tree, data);
break;
case DECT_NWK_PDISC_CISS:
case DECT_NWK_PDISC_CMSS:
case DECT_NWK_PDISC_COMS:
/* FIXME */
default:
break;
}
/* whatever was not dissected: Use generic data dissector */
available_length = tvb_captured_length(tvb) - offset;
if (available_length) {
tvbuff_t *payload = tvb_new_subset_length_caplen(tvb, offset, MIN(len-offset, available_length), len);
call_data_dissector(payload, pinfo, tree);
}
return tvb_captured_length(tvb);
}
void proto_register_dect_nwk(void)
{
static hf_register_info hf[] =
{
{ &hf_nwk_ti,
{ "Transaction Identifier", "dect_nwk.ti", FT_UINT8, BASE_HEX,
NULL, 0xF0, NULL, HFILL
}
},
{ &hf_nwk_pdisc,
{ "Proticol Discriminator", "dect_nwk.pdisc", FT_UINT8, BASE_HEX,
VALS(nwk_pdisc_vals), 0x0F, NULL, HFILL
}
},
{ &hf_nwk_msg_type_cc,
{ "Message Type", "dect_nwk.msg_type", FT_UINT8, BASE_HEX,
VALS(nwk_cc_msgt_vals), 0x0, NULL, HFILL
}
},
{ &hf_nwk_msg_type_mm,
{ "Message Type", "dect_nwk.msg_type", FT_UINT8, BASE_HEX,
VALS(nwk_mm_msgt_vals), 0x0, NULL, HFILL
}
},
{ &hf_nwk_msg_type_lce,
{ "Message Type", "dect_nwk.msg_type", FT_UINT8, BASE_HEX,
VALS(nwk_lce_msgt_vals), 0x0, NULL, HFILL
}
},
};
static gint *ett[] = {
&ett_dect_nwk,
};
/* Register protocol */
proto_dect_nwk = proto_register_protocol("DECT NWK", "DECT-NWK", "dect_nwk");
proto_register_subtree_array(ett, array_length(ett));
proto_register_field_array(proto_dect_nwk, hf, array_length(hf));
dect_nwk_handle = register_dissector("dect_nwk", dissect_dect_nwk, proto_dect_nwk);
}
void proto_reg_handoff_dect_nwk(void)
{
dissector_add_uint("dect_dlc.sapi", 0, dect_nwk_handle);
dissector_add_uint("dect_dlc.sapi", 3, dect_nwk_handle);
}
/*
* Editor modelines - http://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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