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wireshark/epan/dissectors/packet-elcom.c

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/* packet-elcom.c
* Routines for elcom packet dissection
* Copyright 2008, 2011 juha.takala@iki.fi (Juha Takala)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from packet-imap.c
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* I found the protocol specification at
* http://www.sintef.no/upload/Energiforskning/Energisystemer/ELCOM%2090.pdf
*/
#include "config.h"
#include <epan/packet.h>
#define TCP_PORT_ELCOM 5997 /* Not IANA registered */
/* Application level: */
#define A_CONRQ 0x04
#define A_CONRS 0x05
/* Presentation level: */
#define P_CONRQ 0x00
#define P_CONRS 0x10
#define P_RELRQ 0x20
#define P_RELRS 0x30
#define P_DATRQ 0x80
#define TC_REQ 0x40
#define TC_RSP 0x41
#define LOWADR_LEN 17
#define SUFFIX_LEN 2
#define TOTAL_LEN (LOWADR_LEN + SUFFIX_LEN + 2)
#if 0 /* ??? */
#define ELCOM_UNKNOWN_ENDIAN 0
#define ELCOM_LITTLE_ENDIAN 1
#define ELCOM_BIG_ENDIAN 2
#endif
void proto_register_elcom(void);
void proto_reg_handoff_elcom(void);
static int proto_elcom = -1;
static int hf_elcom_response = -1;
static int hf_elcom_request = -1;
static int hf_elcom_length = -1;
static int hf_elcom_type = -1;
static int hf_elcom_initiator = -1;
static int hf_elcom_initiator_endian = -1;
static int hf_elcom_initiator_ip = -1;
static int hf_elcom_initiator_port = -1;
static int hf_elcom_initiator_suff = -1;
static int hf_elcom_responder = -1;
static int hf_elcom_responder_endian = -1;
static int hf_elcom_responder_ip = -1;
static int hf_elcom_responder_port = -1;
static int hf_elcom_responder_suff = -1;
static int hf_elcom_userdata = -1;
static int hf_elcom_userdata_length = -1;
static int hf_elcom_userdata_pduid = -1;
static int hf_elcom_userdata_version = -1;
static int hf_elcom_userdata_result = -1;
static int hf_elcom_userdata_restmark = -1;
static int hf_elcom_userdata_cf = -1;
static int hf_elcom_datarequest = -1;
static int hf_elcom_datarequest_grouptype = -1;
static int hf_elcom_datarequest_result = -1;
static int hf_elcom_datarequest_groupnumber = -1;
static int hf_elcom_datarequest_grouppriority = -1;
static int hf_elcom_datarequest_groupsize = -1;
static int hf_elcom_datarequest_groupindex1 = -1;
static int hf_elcom_datarequest_groupindex2 = -1;
static int hf_elcom_datarequest_oid = -1;
static int hf_elcom_release_reason = -1;
static int hf_elcom_release_result = -1;
static int hf_elcom_strangeleftover = -1;
static gint ett_elcom = -1;
static gint ett_elcom_initiator = -1;
static gint ett_elcom_responder = -1;
static gint ett_elcom_userdata = -1;
static gint ett_elcom_datarequest = -1;
static gboolean elcom_show_hex = TRUE;
static const value_string endian_vals[] = {
{0x0002, "Big"},
{0x0200, "Little"},
{0, NULL }
};
static const value_string suffix_vals[] = {
{'A', "Control"},
{'B', "Unsolicited"},
{'C', "Periodic"},
{'D', "Requested, scheduling"},
{'E', "Requested, present/archived"},
{'G', "Supervisory"},
{'F', "Test"},
{0, NULL }
};
static const value_string userdata_pduid_vals[] = {
{0x04, "Connect Request"},
{0x05, "Connect Response"},
{0, NULL }
};
static const value_string userdata_version_vals[] = {
{0x00, "Class 0, v0"},
{0x01, "Class 1, v0"},
{0x02, "Class 2, v0"},
{0x12, "Class 2, v1"},
{0x13, "Class 3, v1"},
{0, NULL }
};
static const value_string userdata_result_vals[] = {
{0x00, "OK"},
{0, NULL }
};
static const value_string datarequest_grouptype_vals[] = {
{TC_REQ, "Test Connection Request"},
{TC_RSP, "Test Connection Response"},
{0, NULL }
};
static const value_string datarequest_result_vals[] = {
{0x00, "OK"},
{0, NULL }
};
static const value_string type_vals[] = {
{P_CONRQ, "Connect Request"},
{P_CONRS, "Connect Response"},
{P_RELRQ, "Release Request"},
{P_RELRS, "Release Response"},
{P_DATRQ, "Data Request"},
{0, NULL }
};
static gint
dissect_lower_address(proto_item *ti_arg, gint ett_arg,
tvbuff_t *tvb, gint arg_offset,
int hf_endian, int hf_ip, int hf_port, int hf_suff)
{
gint offset = arg_offset;
guint8 len1, len2;
guint8 *suffix;
proto_tree *tree;
proto_item *ti;
tree = proto_item_add_subtree(ti_arg, ett_arg);
/*
* Coding of address:
* ELCOM-90 TRA3825.02 User Element conventions, p. 5-2 and Appendix G
*/
len1 = tvb_get_guint8(tvb, offset);
if (tvb_captured_length_remaining(tvb, offset+len1+1) <= 0)
return offset;
len2 = tvb_get_guint8(tvb, offset+len1+1);
if (tvb_reported_length_remaining(tvb, offset+len1+len2+2) <= 0)
return offset;
if ((len1 != LOWADR_LEN) || (len2 != SUFFIX_LEN)) {
proto_item_append_text(tree, " Invalid structure");
return offset;
}
/* Show pre stuff */
if (0x82 != tvb_get_guint8(tvb, offset+1)) {
proto_item_append_text(tree, " Not IPV4 address");
return offset;
}
offset += 2;
/* endian */
proto_tree_add_item(tree, hf_endian, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* port */
proto_tree_add_item(tree, hf_port, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* ip-addr */
proto_tree_add_item(tree, hf_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
offset += 8; /* skip the zero bytes */
/* SUFFIX */
suffix = tvb_get_string_enc(wmem_packet_scope(), tvb, offset+1, len2, ENC_ASCII);
/* hf_suff FIELDTYPE must be FT_UINT_STRING */
ti = proto_tree_add_item(tree, hf_suff, tvb, offset, 1, ENC_ASCII|ENC_BIG_ENDIAN);
offset += len2+1;
if (!(suffix[0] == 'A' || suffix[0] == 'B')) {
proto_item_append_text(ti, " (invalid)");
return offset;
}
proto_item_append_text(ti, " (%s)", val_to_str_const(suffix[1], suffix_vals, "<<-- WHAT?") );
return offset;
}
static gint
dissect_userdata(proto_item *ti_arg, gint ett_arg, tvbuff_t *tvb, gint arg_offset)
{
gint offset = arg_offset;
guint8 flen, lenbytes;
guint8 year, month, day, hour, min, sec;
guint16 msec;
proto_tree *tree;
proto_item *ti;
tree = proto_item_add_subtree(ti_arg, ett_arg);
/* length of User Data, should be 1 byte field ... */
flen = tvb_get_guint8(tvb, offset);
lenbytes = 1;
/* ... but sometimes it seems to be 2 bytes; try to be clever */
if (flen == 0) {
flen = tvb_get_guint8(tvb, offset+1);
lenbytes = 2;
}
if (flen == 0 || flen > 79) /* invalid */
return offset;
ti = proto_tree_add_item(tree, hf_elcom_userdata_length, tvb, offset, lenbytes, ENC_BIG_ENDIAN);
offset += lenbytes;
if (lenbytes == 2) {
proto_item_append_text(ti, " (2 bytes, should be 1 byte)");
}
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_userdata_pduid, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_userdata_version, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_userdata_result, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/* show the rest */
/* tree2 = proto_tree_add_subtree(tree, tvb, offset, -1, "User Data"); */
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
ti = proto_tree_add_item(tree, hf_elcom_userdata_restmark, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " <-- '0' = no restart etc.");
offset +=1;
if (tvb_reported_length_remaining(tvb, offset+8) <= 0)
return offset;
year = tvb_get_guint8(tvb, offset);
month = tvb_get_guint8(tvb, offset+1);
day = tvb_get_guint8(tvb, offset+2);
hour = tvb_get_guint8(tvb, offset+3);
min = tvb_get_guint8(tvb, offset+4);
sec = tvb_get_guint8(tvb, offset+5);
msec = tvb_get_ntohs(tvb, offset+6);
proto_tree_add_none_format(tree, hf_elcom_userdata_cf, tvb, offset, 8,
"Control Field: %4d-%02d-%02d %02d:%02d:%02d.%d",
year+1900, month, day, hour, min, sec, msec);
offset += 12;
if (tvb_reported_length_remaining(tvb, offset+12) > 0) {
proto_item_append_text(ti, " Security info: ");
}
/* security info field, if present */
while (tvb_reported_length_remaining(tvb, offset) > 0) {
proto_item_append_text(ti, elcom_show_hex ? " %02x" : " %03o",
tvb_get_guint8(tvb, offset));
offset++;
}
return offset;
}
static gint
dissect_datarequest(proto_item *ti_arg, gint ett_arg, tvbuff_t *tvb, gint arg_offset)
{
gint offset = arg_offset;
guint8 gtype, oidlen;
proto_tree *tree;
proto_item *ti;
tree = proto_item_add_subtree(ti_arg, ett_arg);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
gtype = tvb_get_guint8(tvb, offset);
ti = proto_tree_add_item(tree, hf_elcom_datarequest_grouptype,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
switch (gtype) {
case TC_REQ:
/* No more data for this type, suppress the error message */
break;
case TC_RSP:
proto_tree_add_item(tree, hf_elcom_datarequest_result,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
break;
default:
proto_item_append_text(ti, " <<--- meaning WHAT?");
return offset;
}
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_groupnumber, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_grouppriority, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_groupsize, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_groupindex1, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_groupindex2, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
while (1) {
oidlen = tvb_get_guint8(tvb, offset);
if (oidlen == 0) /* normal termination */
break;
if (tvb_reported_length_remaining(tvb, offset+oidlen+1) <= 0)
return offset;
proto_tree_add_item(tree, hf_elcom_datarequest_oid, tvb, offset, 1, ENC_ASCII|ENC_BIG_ENDIAN);
offset += oidlen+1;
}
offset += 1; /* the loop exited at the 0 length byte */
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
/* show the rest */
proto_tree_add_item(tree, hf_elcom_strangeleftover, tvb, offset, -1, ENC_NA);
return offset;
}
/* XXX: Are all the tests against tvb_reported_length() really the right way to handle invalid fields ?
* It seems to me that invalid fields should just add an expert item
* or cause a "Malformed" exception.
*/
static int
dissect_elcom(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
gboolean is_request, length_ok;
proto_tree *elcom_tree;
proto_item *ti, *hidden_item;
gint offset = 0;
guint elcom_len;
guint8 elcom_msg_type;
guint8 *suffix;
/* Check that there's enough data */
if (tvb_captured_length(tvb) < 3)
return 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ELCOM");
col_clear(pinfo->cinfo, COL_INFO);
is_request = (pinfo->match_uint == pinfo->destport);
elcom_len = tvb_get_ntohs(tvb, 0);
length_ok = (tvb_reported_length(tvb) == (elcom_len+2));
col_add_fstr(pinfo->cinfo, COL_INFO, "%s Len=%d%s",
is_request ? "Request" : "Response",
elcom_len,
length_ok ? "" : " (incorrect)");
elcom_msg_type = tvb_get_guint8(tvb, 2);
switch (elcom_msg_type) {
case P_CONRQ:
case P_CONRS:
/* starting after elcom_len and elcom_msg_type,
initiator + responder + userdata fields must be there */
if (tvb_captured_length_remaining(tvb, 3+TOTAL_LEN+TOTAL_LEN+3) < 0) return 2;
/* check also that those field lengths are valid */
if (tvb_get_guint8(tvb, 3) != LOWADR_LEN) return 2;
if (tvb_get_guint8(tvb, 3+1+LOWADR_LEN) != SUFFIX_LEN) return 2;
if (tvb_get_guint8(tvb, 3+TOTAL_LEN) != LOWADR_LEN) return 2;
if (tvb_get_guint8(tvb, 3+1+TOTAL_LEN+LOWADR_LEN) != SUFFIX_LEN) return 2;
/* finally believe that there is valid suffix */
suffix = tvb_get_string_enc(wmem_packet_scope(), tvb, 3+2+LOWADR_LEN, 2, ENC_ASCII);
col_append_fstr(pinfo->cinfo, COL_INFO, " %s Connect", suffix);
break;
case P_RELRQ:
case P_RELRS:
col_append_str(pinfo->cinfo, COL_INFO, " Release");
break;
case P_DATRQ:
col_append_str(pinfo->cinfo, COL_INFO, " Data");
break;
}
switch (elcom_msg_type) {
case P_CONRQ:
case P_RELRQ:
col_append_str(pinfo->cinfo, COL_INFO, " Request");
break;
case P_CONRS:
case P_RELRS:
col_append_str(pinfo->cinfo, COL_INFO, " Response");
break;
}
if (!tree)
return tvb_captured_length(tvb);
ti = proto_tree_add_item(tree, proto_elcom, tvb, offset, -1, ENC_NA);
elcom_tree = proto_item_add_subtree(ti, ett_elcom);
hidden_item = proto_tree_add_boolean(elcom_tree,
is_request ? hf_elcom_request : hf_elcom_response,
tvb, 0, 0, TRUE);
proto_item_set_hidden(hidden_item);
/* 2 first bytes are the frame length */
offset = 0;
ti = proto_tree_add_item(elcom_tree, hf_elcom_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset = +2;
if (! length_ok) {
proto_item_append_text(ti, " (incorrect)");
}
elcom_msg_type = tvb_get_guint8(tvb, offset);
ti = proto_tree_add_item(elcom_tree, hf_elcom_type, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(elcom_tree, " ( %s)", val_to_str(elcom_msg_type, type_vals, "Unknown %d"));
offset++;
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
switch (elcom_msg_type) {
case P_CONRQ:
case P_CONRS:
/*
* Connection request/release assiciated PDU's,
* /ELCOM-90 P Protocol spec/ p. 85...
*/
/* We need the length here, hardcode the LOWADR_LEN = 21 */
ti = proto_tree_add_item(elcom_tree, hf_elcom_initiator, tvb, offset, TOTAL_LEN, ENC_NA);
offset = dissect_lower_address(ti, ett_elcom_initiator, tvb, offset,
hf_elcom_initiator_endian,
hf_elcom_initiator_ip,
hf_elcom_initiator_port,
hf_elcom_initiator_suff);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
ti = proto_tree_add_item(elcom_tree, hf_elcom_responder, tvb, offset, TOTAL_LEN, ENC_NA);
offset = dissect_lower_address(ti, ett_elcom_responder, tvb, offset,
hf_elcom_responder_endian,
hf_elcom_responder_ip,
hf_elcom_responder_port,
hf_elcom_responder_suff);
if (tvb_reported_length_remaining(tvb, offset) <= 0)
return offset;
/* Rest of the payload is USER-DATA, 0..82 bytes */
ti = proto_tree_add_item(elcom_tree, hf_elcom_userdata, tvb, offset, -1, ENC_NA);
offset = dissect_userdata(ti, ett_elcom_userdata, tvb, offset);
break;
case P_RELRQ:
proto_tree_add_item(elcom_tree, hf_elcom_release_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case P_RELRS:
proto_tree_add_item(elcom_tree, hf_elcom_release_result, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case P_DATRQ:
ti = proto_tree_add_item(elcom_tree, hf_elcom_datarequest, tvb, offset, -1, ENC_NA);
offset = dissect_datarequest(ti, ett_elcom_datarequest, tvb, offset);
break;
default:
proto_item_append_text(ti, " <<--- meaning WHAT??");
break;
}
if (tvb_reported_length_remaining(tvb, offset) > 0)
{
/* We should not get here, but if we do, show what is left over: */
proto_tree_add_item(elcom_tree, hf_elcom_strangeleftover, tvb, offset, -1, ENC_NA);
}
return tvb_captured_length(tvb);
}
void
proto_register_elcom(void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_elcom_response,
{ "Response", "elcom.response",
FT_BOOLEAN, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_request,
{ "Request", "elcom.request",
FT_BOOLEAN, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_length,
{ "Length", "elcom.length",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_type,
{ "Type", "elcom.type",
FT_UINT8, BASE_HEX, VALS(type_vals), 0, NULL, HFILL }
},
{ &hf_elcom_initiator,
{ "Initiator", "elcom.initiator",
FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_initiator_endian,
{ "Endian", "elcom.initiator.endian",
FT_UINT16, BASE_HEX, VALS(endian_vals), 0, NULL, HFILL }
},
{ &hf_elcom_initiator_ip,
{ "IP", "elcom.initiator.ip",
FT_IPv4, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_initiator_port,
{ "Port", "elcom.initiator.port",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_initiator_suff,
{ "Suffix", "elcom.initiator.suffix",
FT_UINT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_responder,
{ "Responder", "elcom.responder",
FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_responder_endian,
{ "Endian", "elcom.responder.endian",
FT_UINT16, BASE_HEX, VALS(endian_vals), 0, NULL, HFILL }
},
{ &hf_elcom_responder_ip,
{ "IP", "elcom.responder.ip",
FT_IPv4, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_responder_port,
{ "Port", "elcom.responder.port",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_responder_suff,
{ "Suffix", "elcom.responder.suffix",
FT_UINT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_userdata,
{ "User Data", "elcom.userdata",
FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_userdata_length,
{ "Length", "elcom.userdata.length",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_userdata_pduid,
{ "PDU-ID", "elcom.userdata.pduid",
FT_UINT8, BASE_DEC, VALS(userdata_pduid_vals), 0, NULL, HFILL }
},
{ &hf_elcom_userdata_version,
{ "Version", "elcom.userdata.version",
FT_UINT8, BASE_DEC, VALS(userdata_version_vals), 0, NULL, HFILL }
},
{ &hf_elcom_userdata_result,
{ "Result", "elcom.userdata.result",
FT_UINT8, BASE_DEC, VALS(userdata_result_vals), 0, NULL, HFILL }
},
{ &hf_elcom_userdata_restmark,
{ "Restart marking", "elcom.userdata.response.restartcode",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_userdata_cf,
{ "Control Field", "elcom.userdata.response.controlfield",
FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_release_reason,
{ "Reason", "elcom.release.reason",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_release_result,
{ "Result", "elcom.release.result",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest,
{ "Data Request", "elcom.datarequest",
FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_grouptype,
{ "Group Type", "elcom.datarequest.grouptype",
FT_UINT8, BASE_DEC, VALS(datarequest_grouptype_vals), 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_result,
{ "Result", "elcom.datarequest.result",
FT_UINT8, BASE_DEC, VALS(datarequest_result_vals), 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_groupnumber,
{ "Group Number", "elcom.datarequest.groupnumber",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_grouppriority,
{ "Group Priority", "elcom.datarequest.grouppriority",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_groupsize,
{ "Group Size", "elcom.datarequest.groupsize",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_groupindex1,
{ "Group Index1", "elcom.datarequest.groupindex1",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_groupindex2,
{ "Group Index2", "elcom.datarequest.groupindex2",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_datarequest_oid,
{ "Object Name", "elcom.datarequest.oid",
FT_UINT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }
},
{ &hf_elcom_strangeleftover,
{ "Strange Leftover", "elcom.leftover",
FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_elcom,
&ett_elcom_initiator,
&ett_elcom_responder,
&ett_elcom_userdata,
&ett_elcom_datarequest
};
/* Register the protocol name and description */
proto_elcom = proto_register_protocol (
"ELCOM Communication Protocol",
"ELCOM",
"elcom"
);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_elcom, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_elcom(void)
{
dissector_handle_t elcom_handle;
elcom_handle = create_dissector_handle(dissect_elcom, proto_elcom);
dissector_add_uint_with_preference("tcp.port", TCP_PORT_ELCOM, elcom_handle);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=8 tabstop=8 expandtab:
* :indentSize=8:tabSize=8:noTabs=true:
*/
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