/* 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 * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #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; static int hf_egd_ver; static int hf_egd_type; static int hf_egd_rid; static int hf_egd_pid; static int hf_egd_exid; static int hf_egd_time; static int hf_egd_notime; static int hf_egd_stat; static int hf_egd_csig; static int hf_egd_resv; static gint ett_egd; static gint ett_status_item; 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: */