f30062b9d5
GE Fanuc's Ethernet Global Data uses a unassigned UDP port. Add some simple heuristics, based on the fixed first two bytes of the message.
249 lines
7.2 KiB
C
249 lines
7.2 KiB
C
/* packet-egd.c
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* Routines for Ethernet Global Data dissection
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* EGD Home: www.gefanuc.com
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*
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* Copyright 2008
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* 29 July 2008 -- ryan wamsley
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#define EGD_PORT 18246 /* 0x4746 "GF" for GE Fanuc - Not IANA registered */
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/* The above port is used for data packets. UDP port 7937 (also not registered)
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* is used for configuration commands, but this dissector doesn't support them.
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*/
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#define EGD_ST_NONEW 0
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#define EGD_ST_NOERROR 1
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#define EGD_ST_CONSUMED 2
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#define EGD_ST_SNTPERR 3
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#define EGD_ST_SPECERR 4
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#define EGD_ST_REFRESHERR 6
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#define EGD_ST_REFEXDERR 7
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#define EGD_ST_IPERR 10
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#define EGD_ST_RESOURSEERR 12
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#define EGD_ST_NAMERES 16
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#define EGD_ST_ETHERR 18
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#define EGD_ST_NOSUPPORT 22
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#define EGD_ST_NORESP 26
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#define EGD_ST_CREATEERR 28
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#define EGD_ST_DELETED 30
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void proto_register_egd(void);
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void proto_reg_handoff_egd(void);
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/* Translate status to string */
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static const value_string egd_stat_vals[] = {
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{ EGD_ST_NONEW, "No new status event has occurred" },
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{ EGD_ST_NOERROR, "No error currently exists" },
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{ EGD_ST_CONSUMED, "No error, data consumed" },
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{ EGD_ST_SNTPERR, "SNTP error" },
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{ EGD_ST_SPECERR, "Specification error" },
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{ EGD_ST_REFRESHERR, "Data refresh error" },
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{ EGD_ST_REFEXDERR, "Data refresh period exceeded" },
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{ EGD_ST_IPERR, "IP Layer not currently initialized" },
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{ EGD_ST_RESOURSEERR, "Lack of resource error" },
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{ EGD_ST_NAMERES, "Name Resolution in progress" },
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{ EGD_ST_ETHERR, "Loss of Ethernet Interface error" },
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{ EGD_ST_NOSUPPORT, "Ethernet Interface does not support EGD" },
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{ EGD_ST_NORESP, "No Response from Ethernet Interface" },
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{ EGD_ST_CREATEERR, "Failed to create an exchange." },
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{ EGD_ST_DELETED, "Configured exchange deleted." },
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{ 0, NULL }
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};
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static int proto_egd = -1;
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static int hf_egd_ver = -1;
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static int hf_egd_type = -1;
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static int hf_egd_rid = -1;
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static int hf_egd_pid = -1;
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static int hf_egd_exid = -1;
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static int hf_egd_time = -1;
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static int hf_egd_notime = -1;
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static int hf_egd_stat = -1;
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static int hf_egd_csig = -1;
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static int hf_egd_resv = -1;
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static gint ett_egd = -1;
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static gint ett_status_item = -1;
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static int dissect_egd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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/* EGD Data messages are PDU type 13 (0x0d) and version 1.
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* All other PDU types are Control messages, which are sent to a different
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* port, each have a different format, and not handled by this dissector.
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*/
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if (tvb_get_ntohs(tvb, 0) != 0x0d01) {
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return 0;
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}
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/* replace UDP with EGD in display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "EGD");
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/* Clear out stuff in the info column */
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_fstr(pinfo->cinfo, COL_INFO, "Data Msg: ExchangeID=0x%08X, RequestID=%05u",
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tvb_get_letohl(tvb, 8), tvb_get_letohs(tvb, 2));
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if (tree)
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{
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proto_item *ti = NULL;
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proto_item *notime = NULL;
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proto_tree *egd_tree = NULL;
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tvbuff_t *next_tvb = NULL;
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gint offset, data_length;
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guint32 sectime;
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offset = 0;
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ti = proto_tree_add_item(tree, proto_egd, tvb, 0, -1, ENC_NA);
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egd_tree = proto_item_add_subtree(ti, ett_egd);
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proto_tree_add_item(egd_tree, hf_egd_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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proto_tree_add_item(egd_tree, hf_egd_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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proto_tree_add_item(egd_tree, hf_egd_rid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(egd_tree, hf_egd_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(egd_tree, hf_egd_exid, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
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/* time */
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sectime = tvb_get_letohl(tvb, offset);
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if (0 == sectime)
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{
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notime = proto_tree_add_item(egd_tree, hf_egd_notime, tvb, offset, 8, ENC_LITTLE_ENDIAN);
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proto_item_append_text(notime, "--No TimeStamp");
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}
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else
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{
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proto_tree_add_item(egd_tree, hf_egd_time, tvb, offset, 8, ENC_LITTLE_ENDIAN);
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}
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offset += 8;
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proto_tree_add_item(egd_tree, hf_egd_stat, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
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proto_tree_add_item(egd_tree, hf_egd_csig, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
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proto_tree_add_item(egd_tree, hf_egd_resv, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
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data_length = tvb_reported_length_remaining(tvb, offset);
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if (data_length > 0)
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{
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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call_data_dissector(next_tvb, pinfo, egd_tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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void proto_register_egd(void)
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{
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static hf_register_info hf[] =
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{
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{ &hf_egd_ver,
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{ "Version", "egd.ver",
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FT_UINT8, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_type,
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{ "Type", "egd.type",
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FT_UINT8, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_rid,
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{ "RequestID", "egd.rid",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_pid,
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{ "ProducerID", "egd.pid",
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FT_IPv4, BASE_NONE,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_exid,
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{ "ExchangeID", "egd.exid",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_time,
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{ "Timestamp", "egd.time",
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FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_notime,
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{ "Timestamp", "egd.notime",
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FT_UINT64, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_stat,
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{ "Status", "egd.stat",
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FT_UINT32, BASE_DEC,
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VALS(egd_stat_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_csig,
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{ "ConfigSignature", "egd.csig",
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FT_UINT32, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_egd_resv,
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{ "Reserved", "egd.rsrv",
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FT_UINT32, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL }
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}
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};
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static gint *ett[] =
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{
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&ett_egd,
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&ett_status_item
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};
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proto_egd = proto_register_protocol ("Ethernet Global Data", "EGD", "egd");
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proto_register_field_array(proto_egd, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_egd(void)
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{
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dissector_handle_t egd_handle;
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egd_handle = create_dissector_handle(dissect_egd, proto_egd);
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dissector_add_uint_with_preference("udp.port", EGD_PORT, egd_handle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local Variables:
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* c-basic-offset: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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