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/* packet-dect_aastra.c
*
* Dissector for the proprietary protocol of the internal ethernet link
* between DECT burst processor and ARM processor in Aastra/Mitel DECT
* base stations.
*
* 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_aastra = -1;
static gint hf_aamide_len = -1;
static gint hf_xdlc_prim_type = -1;
static gint hf_xdlc_mcei = -1;
static gint hf_xdlc_info_string = -1;
static gint hf_xdlc_pmid = -1;
static gint hf_xdlc_subfield = -1;
static gint ett_aamide = -1;
static dissector_handle_t data_handle;
static dissector_handle_t dlc_handle;
#define AAMIDE_ETH_T_XDLC 0xA000
#define AAMIDE_ETH_T_DOWNLOAD 0xA002
#define AAMIDE_ETH_T_VIDEO 0xA003
#define AAMIDE_ETH_T_AUDIOLOG 0xA004
enum aamide_prim_type {
AAMIDE_P_MAC_CON_IND = 0x01,
AAMIDE_P_MAC_DIS_REQ = 0x02,
AAMIDE_P_MAC_DIS_IND = 0x03,
AAMIDE_P_LC_DATA_REQ = 0x05,
AAMIDE_P_LC_DATA_IND = 0x06,
AAMIDE_P_LC_DTR_IND = 0x07,
AAMIDE_P_MAC_PAGE_REQ = 0x08,
AAMIDE_P_MAC_ENC_KEY_REQ = 0x09,
AAMIDE_P_MAC_ENC_EKS_IND = 0x0a,
AAMIDE_P_HO_IN_PROGRESS_IND = 0x0b,
AAMIDE_P_HO_IN_PROGRESS_RES = 0x0c,
AAMIDE_P_HO_FAILED_IND = 0x0d,
AAMIDE_P_HO_FAILED_REQ = 0x0e,
AAMIDE_P_DLC_RFP_ERROR_IND = 0x14,
AAMIDE_P_MAC_CON_EXT_IND = 0x15,
AAMIDE_P_HO_IN_PROGRESS_EXT_IND = 0x16,
AAMIDE_P_MAC_MOD_REQ = 0x17,
AAMIDE_P_MAC_MOD_CNF = 0x18,
AAMIDE_P_MAC_MOD_IND = 0x19,
AAMIDE_P_MAC_MOD_REJ = 0x1a,
AAMIDE_P_MAC_RECORD_AUDIO = 0x1b,
AAMIDE_P_MAC_INFO_IND = 0x1c,
AAMIDE_P_MAC_GET_DEF_CKEY_IND = 0x1d,
AAMIDE_P_MAC_GET_DEF_CKEY_RES = 0x1e,
AAMIDE_P_MAC_CLEAR_DEF_CKEY_REQ = 0x1f,
AAMIDE_P_MAC_GET_CURR_CKEY_ID_REQ = 0x20,
AAMIDE_P_MAC_GET_CURR_CKEY_ID_CNF = 0x21,
};
static const value_string xdlc_prim_names[] = {
{ AAMIDE_P_MAC_CON_IND, "MAC_CON_IND" },
{ AAMIDE_P_MAC_DIS_REQ, "MAC_DIS_REQ" },
{ AAMIDE_P_MAC_DIS_IND, "MAC_DIS_IND" },
{ AAMIDE_P_LC_DATA_REQ, "LC_DATA_REQ" },
{ AAMIDE_P_LC_DATA_IND, "LC_DATA_IND" },
{ AAMIDE_P_LC_DTR_IND, "LC_DTR_IND" },
{ AAMIDE_P_MAC_PAGE_REQ, "MAC_PAGE_REQ" },
{ AAMIDE_P_MAC_ENC_KEY_REQ, "MAC_ENC_KEY_REQ" },
{ AAMIDE_P_MAC_ENC_EKS_IND, "MAC_ENC_EKS_IND" },
{ AAMIDE_P_HO_IN_PROGRESS_IND, "HO_IN_PROGRRESS_IND" },
{ AAMIDE_P_HO_IN_PROGRESS_RES, "HO_IN_PROGRERSS_RES" },
{ AAMIDE_P_HO_FAILED_IND, "HO_FAILED_IND" },
{ AAMIDE_P_HO_FAILED_REQ, "HO_FAILED_REQ" },
{ AAMIDE_P_DLC_RFP_ERROR_IND, "RFP_ERROR_IND" },
{ AAMIDE_P_MAC_CON_EXT_IND, "MAC_CON_EXT_IND" },
{ AAMIDE_P_HO_IN_PROGRESS_EXT_IND, "HO_IN_PROGRESS_EXT_IND" },
{ AAMIDE_P_MAC_MOD_REQ, "MAC_MOD_REQ" },
{ AAMIDE_P_MAC_MOD_CNF, "MAC_MOD_CNF" },
{ AAMIDE_P_MAC_MOD_IND, "MAC_MOD_IND" },
{ AAMIDE_P_MAC_MOD_REQ, "MAC_MOD_REQ" },
{ AAMIDE_P_MAC_RECORD_AUDIO, "MAC_RECORD_AUDIO" },
{ AAMIDE_P_MAC_INFO_IND, "MAC_INFO_IND" },
{ AAMIDE_P_MAC_GET_DEF_CKEY_IND, "MAC_GET_DEF_CKEY_IND" },
{ AAMIDE_P_MAC_GET_DEF_CKEY_RES, "MAC_GET_DEF_CKEY_RES" },
{ AAMIDE_P_MAC_CLEAR_DEF_CKEY_REQ, "MAC_CLEAR_DEF_CKEY_REQ" },
{ AAMIDE_P_MAC_GET_CURR_CKEY_ID_REQ, "MAC_GET_CURR_CKEY_ID_REQ"},
{ AAMIDE_P_MAC_GET_CURR_CKEY_ID_CNF, "MAC_GET_CURR_CKEY_ID_CNF" },
{ 0, NULL }
};
static const value_string xdlc_subfield_names[] = {
{ 0x00, "B0" },
{ 0x10, "B1" },
{ 0, NULL }
};
static int dissect_aamide_xdlc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint16 aamide_len, payload_len;
guint8 prim_type, mcei;
int offset = 0;
tvbuff_t *payload_tvb = NULL;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AA-XDLC");
col_clear(pinfo->cinfo, COL_INFO);
aamide_len = tvb_get_guint16(tvb, offset, 2);
proto_tree_add_item(tree, hf_aamide_len, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
if (aamide_len < 3)
return tvb_captured_length(tvb);
prim_type = tvb_get_guint8(tvb, offset+3);
proto_tree_add_item(tree, hf_xdlc_prim_type, tvb, offset+3, 1, ENC_NA);
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str(prim_type, xdlc_prim_names, "Unknown 0x%02x"));
switch (prim_type) {
case AAMIDE_P_MAC_PAGE_REQ:
payload_len = tvb_get_guint8(tvb, offset+4);
payload_tvb = tvb_new_subset_length(tvb, offset+5, payload_len);
break;
case AAMIDE_P_MAC_CON_IND:
mcei = tvb_get_guint8(tvb, offset+4);
col_append_fstr(pinfo->cinfo, COL_INFO, "MCEI=%02x ", mcei);
proto_tree_add_item(tree, hf_xdlc_mcei, tvb, offset+4, 1, ENC_NA);
proto_tree_add_item(tree, hf_xdlc_pmid, tvb, offset+6, 2, ENC_BIG_ENDIAN);
break;
case AAMIDE_P_MAC_INFO_IND:
mcei = tvb_get_guint8(tvb, offset+4);
col_append_fstr(pinfo->cinfo, COL_INFO, "MCEI=%02x ", mcei);
proto_tree_add_item(tree, hf_xdlc_mcei, tvb, offset+4, 1, ENC_NA);
/* from offset 9 onwards, there's a null-terminated string */
proto_tree_add_item(tree, hf_xdlc_info_string, tvb, offset+9,
tvb_captured_length_remaining(tvb, offset+9), ENC_ASCII|ENC_NA);
break;
case AAMIDE_P_MAC_DIS_REQ:
case AAMIDE_P_MAC_DIS_IND:
mcei = tvb_get_guint8(tvb, offset+4);
col_append_fstr(pinfo->cinfo, COL_INFO, "MCEI=%02x ", mcei);
proto_tree_add_item(tree, hf_xdlc_mcei, tvb, offset+4, 1, ENC_NA);
break;
case AAMIDE_P_LC_DTR_IND:
mcei = tvb_get_guint8(tvb, offset+4);
col_append_fstr(pinfo->cinfo, COL_INFO, "MCEI=%02x ", mcei);
proto_tree_add_item(tree, hf_xdlc_mcei, tvb, offset+4, 1, ENC_NA);
proto_tree_add_item(tree, hf_xdlc_subfield, tvb, offset+5, 1, ENC_NA);
break;
case AAMIDE_P_LC_DATA_REQ:
case AAMIDE_P_LC_DATA_IND:
mcei = tvb_get_guint8(tvb, offset+4);
col_append_fstr(pinfo->cinfo, COL_INFO, "MCEI=%02x ", mcei);
proto_tree_add_item(tree, hf_xdlc_mcei, tvb, offset+4, 1, ENC_NA);
proto_tree_add_item(tree, hf_xdlc_subfield, tvb, offset+5, 1, ENC_NA);
payload_len = tvb_get_guint8(tvb, offset+6);
payload_len = tvb_get_guint8(tvb, offset+6);
payload_tvb = tvb_new_subset_length(tvb, offset+7, payload_len);
if (payload_tvb)
call_dissector(dlc_handle, payload_tvb, pinfo, tree);
payload_tvb = NULL;
break;
default:
break;
}
if (payload_tvb)
call_dissector(data_handle, payload_tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
void proto_register_dect_aastra(void)
{
static hf_register_info hf[] =
{
{ &hf_aamide_len,
{ "Length", "aamide.length", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL
}
},
{ &hf_xdlc_prim_type,
{ "Primitive Type", "aamide.prim", FT_UINT8, BASE_HEX,
VALS(xdlc_prim_names), 0x0, NULL, HFILL
}
},
{ &hf_xdlc_mcei,
{ "MCEI", "aamide.mcei", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL
}
},
{ &hf_xdlc_info_string,
{ "MAC Info String", "aamide.mac_info_str", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL
}
},
{ &hf_xdlc_pmid,
{ "PMID", "aamide.pmid", FT_UINT16, BASE_HEX,
NULL, 0, NULL, HFILL
}
},
{ &hf_xdlc_subfield,
{ "Subfield", "aamide.subfield", FT_UINT8, BASE_HEX,
VALS(xdlc_subfield_names), 0, NULL, HFILL
}
},
};
static gint *ett[] = {
&ett_aamide,
};
/* Register protocol */
proto_dect_aastra = proto_register_protocol("Aastra/Mitel DECT-over-Etehernet XDLC", "DECToE-XDLC", "aamide");
proto_register_subtree_array(ett, array_length(ett));
proto_register_field_array(proto_dect_aastra, hf, array_length(hf));
}
void proto_reg_handoff_dect_aastra(void)
{
dissector_handle_t xdlc_handle =
create_dissector_handle(dissect_aamide_xdlc, proto_dect_aastra);
dissector_add_uint("ethertype", AAMIDE_ETH_T_XDLC, xdlc_handle);
data_handle = find_dissector("data");
dlc_handle = find_dissector("dect_dlc");
}
/*
* 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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