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/* packet-egd.c
* Routines for Ethernet Global Data dissection
* EGD Home: www.gefanuc.com
*
* Copyright 2008
* 29 July 2008 -- ryan wamsley
*
* 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>
#define EGD_PORT 18246 /* 0x4746 "GF" for GE Fanuc - Not IANA registered */
/* The above port is used for data packets. UDP port 7937 (also not registered)
* is used for configuration commands, but this dissector doesn't support them.
*/
#define EGD_ST_NONEW 0
#define EGD_ST_NOERROR 1
#define EGD_ST_CONSUMED 2
#define EGD_ST_SNTPERR 3
#define EGD_ST_SPECERR 4
#define EGD_ST_REFRESHERR 6
#define EGD_ST_REFEXDERR 7
#define EGD_ST_IPERR 10
#define EGD_ST_RESOURSEERR 12
#define EGD_ST_NAMERES 16
#define EGD_ST_ETHERR 18
#define EGD_ST_NOSUPPORT 22
#define EGD_ST_NORESP 26
#define EGD_ST_CREATEERR 28
#define EGD_ST_DELETED 30
void proto_register_egd(void);
void proto_reg_handoff_egd(void);
static dissector_handle_t egd_handle;
/* Translate status to string */
static const value_string egd_stat_vals[] = {
{ EGD_ST_NONEW, "No new status event has occurred" },
{ EGD_ST_NOERROR, "No error currently exists" },
{ EGD_ST_CONSUMED, "No error, data consumed" },
{ EGD_ST_SNTPERR, "SNTP error" },
{ EGD_ST_SPECERR, "Specification error" },
{ EGD_ST_REFRESHERR, "Data refresh error" },
{ EGD_ST_REFEXDERR, "Data refresh period exceeded" },
{ EGD_ST_IPERR, "IP Layer not currently initialized" },
{ EGD_ST_RESOURSEERR, "Lack of resource error" },
{ EGD_ST_NAMERES, "Name Resolution in progress" },
{ EGD_ST_ETHERR, "Loss of Ethernet Interface error" },
{ EGD_ST_NOSUPPORT, "Ethernet Interface does not support EGD" },
{ EGD_ST_NORESP, "No Response from Ethernet Interface" },
{ EGD_ST_CREATEERR, "Failed to create an exchange." },
{ EGD_ST_DELETED, "Configured exchange deleted." },
{ 0, NULL }
};
static int proto_egd = -1;
static int hf_egd_ver = -1;
static int hf_egd_type = -1;
static int hf_egd_rid = -1;
static int hf_egd_pid = -1;
static int hf_egd_exid = -1;
static int hf_egd_time = -1;
static int hf_egd_notime = -1;
static int hf_egd_stat = -1;
static int hf_egd_csig = -1;
static int hf_egd_resv = -1;
static gint ett_egd = -1;
static gint ett_status_item = -1;
static int dissect_egd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
/* EGD Data messages are PDU type 13 (0x0d) and version 1.
* All other PDU types are Control messages, which are sent to a different
* port, each have a different format, and not handled by this dissector.
*/
if (tvb_get_ntohs(tvb, 0) != 0x0d01) {
return 0;
}
/* replace UDP with EGD in display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "EGD");
/* Clear out stuff in the info column */
col_clear(pinfo->cinfo, COL_INFO);
col_add_fstr(pinfo->cinfo, COL_INFO, "Data Msg: ExchangeID=0x%08X, RequestID=%05u",
tvb_get_letohl(tvb, 8), tvb_get_letohs(tvb, 2));
if (tree)
{
proto_item *ti = NULL;
proto_item *notime = NULL;
proto_tree *egd_tree = NULL;
tvbuff_t *next_tvb = NULL;
gint offset, data_length;
guint32 sectime;
offset = 0;
ti = proto_tree_add_item(tree, proto_egd, tvb, 0, -1, ENC_NA);
egd_tree = proto_item_add_subtree(ti, ett_egd);
proto_tree_add_item(egd_tree, hf_egd_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset++;
proto_tree_add_item(egd_tree, hf_egd_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset++;
proto_tree_add_item(egd_tree, hf_egd_rid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(egd_tree, hf_egd_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(egd_tree, hf_egd_exid, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
/* time */
sectime = tvb_get_letohl(tvb, offset);
if (0 == sectime)
{
notime = proto_tree_add_item(egd_tree, hf_egd_notime, tvb, offset, 8, ENC_LITTLE_ENDIAN);
proto_item_append_text(notime, "--No TimeStamp");
}
else
{
proto_tree_add_item(egd_tree, hf_egd_time, tvb, offset, 8, ENC_LITTLE_ENDIAN);
}
offset += 8;
proto_tree_add_item(egd_tree, hf_egd_stat, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(egd_tree, hf_egd_csig, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(egd_tree, hf_egd_resv, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
data_length = tvb_reported_length_remaining(tvb, offset);
if (data_length > 0)
{
next_tvb = tvb_new_subset_remaining(tvb, offset);
call_data_dissector(next_tvb, pinfo, egd_tree);
}
}
return tvb_captured_length(tvb);
}
void proto_register_egd(void)
{
static hf_register_info hf[] =
{
{ &hf_egd_ver,
{ "Version", "egd.ver",
FT_UINT8, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_type,
{ "Type", "egd.type",
FT_UINT8, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_rid,
{ "RequestID", "egd.rid",
FT_UINT16, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_pid,
{ "ProducerID", "egd.pid",
FT_IPv4, BASE_NONE,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_exid,
{ "ExchangeID", "egd.exid",
FT_UINT32, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_time,
{ "Timestamp", "egd.time",
FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_notime,
{ "Timestamp", "egd.notime",
FT_UINT64, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_stat,
{ "Status", "egd.stat",
FT_UINT32, BASE_DEC,
VALS(egd_stat_vals), 0x0,
NULL, HFILL }
},
{ &hf_egd_csig,
{ "ConfigSignature", "egd.csig",
FT_UINT32, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_egd_resv,
{ "Reserved", "egd.rsrv",
FT_UINT32, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
}
};
static gint *ett[] =
{
&ett_egd,
&ett_status_item
};
proto_egd = proto_register_protocol ("Ethernet Global Data", "EGD", "egd");
proto_register_field_array(proto_egd, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
egd_handle = register_dissector("egd", dissect_egd, proto_egd);
}
void proto_reg_handoff_egd(void)
{
dissector_add_uint_with_preference("udp.port", EGD_PORT, egd_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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