417 lines
16 KiB
C
Executable File
417 lines
16 KiB
C
Executable File
/* packet-sapigs.c
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* Routines for SAP IGS (Internet Graphics Server) dissection
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* Copyright 2022, Yvan Genuer (@iggy38), Devoteam
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* Copyright 2022, Martin Gallo <martin.gallo [AT] gmail.com>
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* Code contributed by SecureAuth Corp.
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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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/*
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* This is a simple dissector for the IGS protocol, initially added by Yvan Genuer as part of their research around the protocol:
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* https://www.troopers.de/troopers18/agenda/3r38lr/. Some details and example requests can be found in pysap's documentation:
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* https://pysap.readthedocs.io/en/latest/protocols/SAPIGS.html
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*/
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#include <config.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include <wsutil/strtoi.h>
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#include <wsutil/wmem/wmem.h>
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/*
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* Define default ports. The right range should be 4NNNN, but as port numbers are proprietary and not
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* IANA assigned, we leave only the ones corresponding to the instance 00.
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*/
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#define SAPIGS_PORT_RANGE "40000"
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/* IGS Functions values */
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static const value_string sapigs_function_lst[] = {
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{ 1, "ADM:REGPW"}, /* Register a PortWatcher */
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{ 2, "ADM:UNREGPW"}, /* Unregsiter a PortWatcher */
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{ 3, "ADM:REGIP"}, /* Register an Interpreter */
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{ 4, "ADM:UNREGIP"}, /* Unregsiter an Interpreter */
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{ 5, "ADM:FREEIP"}, /* Inform than Interpreter is free */
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{ 6, "ADM:ILLBEBACK"}, /* Call back function */
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{ 7, "ADM:ABORT"}, /* Abort Interpreter work */
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{ 8, "ADM:PING"}, /* Ping receive */
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{ 9, "ADM:PONG"}, /* Ping send */
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{ 10, "ADM:SHUTDOWNIGS"}, /* Shutdown IGS */
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{ 11, "ADM:SHUTDOWNPW"}, /* Shutdown PortWatcher */
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{ 12, "ADM:CHECKCONSUMER"}, /* Check Portwatcher status */
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{ 13, "ADM:FREECONSUMER"}, /* Inform than portwather is free */
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{ 14, "ADM:GETLOGFILE"}, /* Display log file */
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{ 15, "ADM:GETCONFIGFILE"}, /* Display configfile */
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{ 16, "ADM:GETDUMP"}, /* Display dump file */
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{ 17, "ADM:DELETEDUMP"}, /* Delete dump file */
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{ 18, "ADM:INSTALL"}, /* Upload shapefiles for GIS */
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{ 19, "ADM:SWITCH"}, /* Switch trace log level */
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{ 20, "ADM:GETVERSION"}, /* Get IGS Version */
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{ 21, "ADM:STATUS"}, /* Display IGS Status */
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{ 22, "ADM:STATISTIC"}, /* old Display IGS Statistic */
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{ 23, "ADM:STATISTICNEW"}, /* Display IGS Statistic */
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{ 24, "ADM:GETSTATCHART"}, /* Get IGS Statistic chart */
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{ 25, "ADM:SIM"}, /* Simulation function */
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{ 30, "ZIPPER"}, /* ZIP provide file(s) */
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{ 31, "IMGCONV"}, /* Image converter */
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{ 32, "RSPOCONNECTOR"}, /* Remote Spool Connector */
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{ 33, "XMLCHART"}, /* Chart generator throught xml input */
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{ 34, "CHART"}, /* Chart generator throught ABAP Table input */
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{ 35, "BWGIS"}, /* BW Geographic Information System */
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{ 36, "SAPGISXML"}, /* old SAP GIS throught xml input */
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/* NULL */
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{ 0, NULL}
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};
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static int proto_sapigs = -1;
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/* Headers */
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static int hf_sapigs_function = -1;
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static int hf_sapigs_listener = -1;
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static int hf_sapigs_hostname = -1;
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static int hf_sapigs_id = -1;
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static int hf_sapigs_padd1 = -1;
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static int hf_sapigs_flag1 = -1;
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static int hf_sapigs_padd2 = -1;
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static int hf_sapigs_flag2 = -1;
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static int hf_sapigs_padd3 = -1;
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/* Data */
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static int hf_sapigs_eye_catcher = -1;
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static int hf_sapigs_padd4 = -1;
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static int hf_sapigs_codepage = -1;
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static int hf_sapigs_offset_data = -1;
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static int hf_sapigs_data_size = -1;
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static int hf_sapigs_data = -1;
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/* Table definition */
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static int hf_sapigs_tables = -1;
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static int hf_sapigs_table_version = -1;
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static int hf_sapigs_table_name = -1;
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static int hf_sapigs_table_line_number = -1;
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static int hf_sapigs_table_width = -1;
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static int hf_sapigs_table_column_name = -1;
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static int hf_sapigs_table_column_number = -1;
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static int hf_sapigs_table_column_width = -1;
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/* Others */
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static int hf_sapigs_portwatcher = -1;
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static int hf_sapigs_portwatcher_version = -1;
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static int hf_sapigs_portwatcher_info = -1;
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static int hf_sapigs_interpreter = -1;
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static int hf_sapigs_chart_config = -1;
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static gint ett_sapigs = -1;
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/* Global port preference */
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static range_t *global_sapigs_port_range;
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/* Global highlight preference */
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static gboolean global_sapigs_highlight_items = TRUE;
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/* Protocol handle */
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static dissector_handle_t sapigs_handle;
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void proto_reg_handoff_sapigs(void);
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void proto_register_sapigs(void);
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static int
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dissect_sapigs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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guint32 offset = 0, err_val = 0;
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gint data_offset = 0, data_length = 0;
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gchar *sapigs_info_function = NULL, *illbeback_type = NULL, *is_table = NULL;
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proto_item *ti = NULL, *sapigs_tables = NULL;
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proto_tree *sapigs_tree = NULL, *sapigs_tables_tree = NULL;
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/* Add the protocol to the column */
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col_add_str(pinfo->cinfo, COL_PROTOCOL, "SAPIGS");
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/* Add function name in the info column */
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col_add_fstr(pinfo->cinfo, COL_INFO, " function: %s", tvb_get_string_enc(pinfo->pool, tvb, 0, 32, ENC_ASCII));
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/* Add the main sapigs subtree */
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ti = proto_tree_add_item(tree, proto_sapigs, tvb, 0, -1, ENC_NA);
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sapigs_tree = proto_item_add_subtree(ti, ett_sapigs);
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/* Retrieve function name */
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sapigs_info_function = (char *)tvb_get_string_enc(pinfo->pool, tvb, offset, 32, ENC_ASCII);
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/* Headers */
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proto_tree_add_item(sapigs_tree, hf_sapigs_function, tvb, offset, 32, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_listener, tvb, offset, 32, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_hostname, tvb, offset, 81, ENC_ASCII|ENC_NA);
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offset += 81;
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proto_tree_add_item(sapigs_tree, hf_sapigs_id, tvb, offset, 4, ENC_ASCII|ENC_NA);
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offset += 4;
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proto_tree_add_item(sapigs_tree, hf_sapigs_padd1, tvb, offset, 15, ENC_ASCII);
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offset += 15;
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proto_tree_add_item(sapigs_tree, hf_sapigs_flag1, tvb, offset, 1, ENC_ASCII);
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offset += 1;
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proto_tree_add_item(sapigs_tree, hf_sapigs_padd2, tvb, offset, 20, ENC_ASCII);
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offset += 20;
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proto_tree_add_item(sapigs_tree, hf_sapigs_flag2, tvb, offset, 1, ENC_ASCII);
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offset += 1;
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proto_tree_add_item(sapigs_tree, hf_sapigs_padd3, tvb, offset, 6, ENC_ASCII);
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offset += 6;
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/* switch over function name value */
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switch (str_to_val(sapigs_info_function, sapigs_function_lst, err_val)){
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case 8:{ /* ADM:PING */
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher, tvb, offset, 5, ENC_ASCII|ENC_NA);
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break;
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}
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case 9:{ /* ADM:PONG */
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break;
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}
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case 1:{ /* ADM:REGPW */
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher, tvb, offset, 5, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher_version, tvb, offset, 16, ENC_ASCII|ENC_NA);
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break;
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}
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case 3: /* ADM:REGIP */
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case 5:{ /* ADM:FREEIP */
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher, tvb, offset, 5, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_interpreter, tvb, offset, 16, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher_version, tvb, offset, 16, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_portwatcher_info, tvb, offset, 16, ENC_ASCII|ENC_NA);
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break;
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}
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case 6:{ /* ADM:ILLBEBACK */
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illbeback_type = (gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 10, ENC_ASCII|ENC_NA);
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if (strncmp("TransMagic", illbeback_type, 10) == 0){
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/* data is raw after eye_catcher */
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proto_tree_add_item(sapigs_tree, hf_sapigs_eye_catcher, tvb, offset, 10, ENC_ASCII|ENC_NA);
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offset += 16;
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proto_tree_add_item(sapigs_tree, hf_sapigs_data, tvb, offset, -1, ENC_NA);
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} else {
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/* we receive sized data */
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ws_strtoi((gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 5, ENC_ASCII), NULL, &data_length);
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proto_tree_add_item(sapigs_tree, hf_sapigs_data_size, tvb, offset, 5, ENC_ASCII|ENC_NA);
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offset += 5;
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/* Data */
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if ((data_length > 0) && (tvb_reported_length_remaining(tvb, offset) >= data_length)) {
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proto_tree_add_item(sapigs_tree, hf_sapigs_data, tvb, offset, data_length, ENC_NA);
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}
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}
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break;
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}
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case 30: /* ZIPPER */
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case 31: /* IMGCONV */
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case 33: /* XMLCHART */
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case 16:{ /* ADM:GETDUMP */
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proto_tree_add_item(sapigs_tree, hf_sapigs_eye_catcher, tvb, offset, 10, ENC_ASCII|ENC_NA);
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offset += 10;
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proto_tree_add_item(sapigs_tree, hf_sapigs_padd4, tvb, offset, 2, ENC_ASCII);
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offset += 2;
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proto_tree_add_item(sapigs_tree, hf_sapigs_codepage, tvb, offset, 4, ENC_ASCII|ENC_NA);
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offset += 4;
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/* Data offset */
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ws_strtoi((gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 16, ENC_ASCII), NULL, &data_offset);
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proto_tree_add_item(sapigs_tree, hf_sapigs_offset_data, tvb, offset, 16, ENC_ASCII|ENC_NA);
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offset += 16;
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/* Data length */
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ws_strtoi((gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 16, ENC_ASCII), NULL, &data_length);
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proto_tree_add_item(sapigs_tree, hf_sapigs_data_size, tvb, offset, 16, ENC_ASCII|ENC_NA);
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offset += 16;
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data_offset += offset;
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/* Definition tables */
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is_table = (gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 4, ENC_ASCII);
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/* if the 4 next char is VERS, we are at the begining of one definition table */
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while(strncmp("VERS", is_table, 4) == 0){
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/* Build a tree for Tables */
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sapigs_tables = proto_tree_add_item(sapigs_tree, hf_sapigs_tables, tvb, offset, 336, ENC_NA);
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sapigs_tables_tree = proto_item_add_subtree(sapigs_tables, ett_sapigs);
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_version, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_name, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_line_number, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_width, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_column_name, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_column_number, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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proto_tree_add_item(sapigs_tables_tree, hf_sapigs_table_column_width, tvb, offset+8, 40, ENC_ASCII);
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offset += 48;
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is_table = (gchar *)tvb_get_string_enc(pinfo->pool, tvb, offset, 4, ENC_ASCII);
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}
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/* Data */
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if ((data_length > 0) && (tvb_reported_length_remaining(tvb, offset) >= data_length)) {
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proto_tree_add_item(sapigs_tree, hf_sapigs_data, tvb, data_offset, data_length, ENC_NA);
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}
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break;
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}
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case 34:{ /* CHART */
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proto_tree_add_item(sapigs_tree, hf_sapigs_chart_config, tvb, offset, 32, ENC_ASCII|ENC_NA);
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offset += 32;
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proto_tree_add_item(sapigs_tree, hf_sapigs_data, tvb, offset, -1, ENC_NA);
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break;
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}
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}
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return tvb_reported_length(tvb);
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}
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void
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proto_register_sapigs(void)
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{
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static hf_register_info hf[] = {
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/* General Header fields */
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{ &hf_sapigs_function,
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{ "Function", "sapigs.function", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_listener,
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{ "Listener", "sapigs.listener", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_hostname,
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{ "Hostname", "sapigs.hostname", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_id,
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{ "Id", "sapigs.id", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_padd1,
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{ "Padd1", "sapigs.padd1", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_flag1,
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{ "Flag1", "sapigs.flag1", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_padd2,
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{ "Padd2", "sapigs.padd2", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_flag2,
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{ "Flag2", "sapigs.flag2", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_padd3,
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{ "Padd3", "sapigs.padd3", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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/* Data headers */
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{ &hf_sapigs_eye_catcher,
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{ "Eye catcher", "sapigs.eye_catcher", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_padd4,
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{ "Padd4", "sapigs.padd4", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_codepage,
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{ "Codepage", "sapigs.codepage", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_offset_data,
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{ "Offset to data", "sapigs.offset_data", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_data_size,
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{ "Data size", "sapigs.data_size", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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/* Portwatcher fields */
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{ &hf_sapigs_portwatcher,
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{ "Portwatcher Port", "sapigs.portwatcher", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_portwatcher_version,
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{ "Portwatcher version", "sapigs.portwatcher_version", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_portwatcher_info,
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{ "Portwatcher Info", "sapigs.portwatcher_info", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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/* Interpreter information */
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{ &hf_sapigs_interpreter,
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{ "Interpreter name", "sapigs.interpreter", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_chart_config,
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{ "Chart configuration", "sapigs.chart_config", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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/* Table definition fields */
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{ &hf_sapigs_tables,
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{ "Table definition", "sapigs.tables", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_sapigs_table_version,
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{ "VERS", "sapigs.table_version", FT_STRING, BASE_NONE, NULL, 0x0, "Table version", HFILL }},
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{ &hf_sapigs_table_name,
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{ "TBNM", "sapigs.table_name", FT_STRING, BASE_NONE, NULL, 0x0, "Table name", HFILL }},
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{ &hf_sapigs_table_line_number,
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{ "TBLN", "sapigs.table_line_number", FT_STRING, BASE_NONE, NULL, 0x0, "Line count", HFILL }},
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{ &hf_sapigs_table_width,
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{ "TBWD", "sapigs.table_width", FT_STRING, BASE_NONE, NULL, 0x0, "Table width", HFILL }},
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{ &hf_sapigs_table_column_name,
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{ "TBCL", "sapigs.table_column_name", FT_STRING, BASE_NONE, NULL, 0x0, "Table column name", HFILL }},
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{ &hf_sapigs_table_column_number,
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{ "CLNM", "sapigs.table_column_number", FT_STRING, BASE_NONE, NULL, 0x0, "Column count", HFILL }},
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{ &hf_sapigs_table_column_width,
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{ "CLWD", "sapigs.table_column_width", FT_STRING, BASE_NONE, NULL, 0x0, "Column width", HFILL }},
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/* Data */
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{ &hf_sapigs_data,
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{ "Data", "sapigs.table_data", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}
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};
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|
|
/* Setup protocol subtre array */
|
|
static gint *ett[] = {
|
|
&ett_sapigs
|
|
};
|
|
|
|
module_t *sapigs_module;
|
|
|
|
/* Register the protocol */
|
|
proto_sapigs = proto_register_protocol("SAP Internet Graphic Server", "SAPIGS", "sapigs");
|
|
|
|
register_dissector("sapigs", dissect_sapigs, proto_sapigs);
|
|
|
|
proto_register_field_array(proto_sapigs, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register the preferences */
|
|
sapigs_module = prefs_register_protocol(proto_sapigs, proto_reg_handoff_sapigs);
|
|
|
|
range_convert_str(wmem_epan_scope(), &global_sapigs_port_range, SAPIGS_PORT_RANGE, MAX_TCP_PORT);
|
|
prefs_register_range_preference(sapigs_module, "tcp_ports", "SAP IGS Protocol TCP port numbers", "Port numbers used for SAP IGS Protocol (default "SAPIGS_PORT_RANGE ")", &global_sapigs_port_range, MAX_TCP_PORT);
|
|
|
|
prefs_register_bool_preference(sapigs_module, "highlight_unknow_items", "Highlight unknow SAP IGS messages", "Wether the SAP IGS Protocol dissector should highlight unknown IGS messages", &global_sapigs_highlight_items);
|
|
|
|
}
|
|
|
|
/**
|
|
* Helpers for dealing with the port range
|
|
*/
|
|
static void range_delete_callback (guint32 port, gpointer ptr _U_)
|
|
{
|
|
dissector_delete_uint("sapni.port", port, sapigs_handle);
|
|
}
|
|
|
|
static void range_add_callback (guint32 port, gpointer ptr _U_)
|
|
{
|
|
dissector_add_uint("sapni.port", port, sapigs_handle);
|
|
}
|
|
|
|
/**
|
|
* Register Hand off for the SAP IGS Protocol
|
|
*/
|
|
void
|
|
proto_reg_handoff_sapigs(void)
|
|
{
|
|
static range_t *sapigs_port_range;
|
|
static gboolean initialized = FALSE;
|
|
|
|
if (!initialized) {
|
|
sapigs_handle = create_dissector_handle(dissect_sapigs, proto_sapigs);
|
|
initialized = TRUE;
|
|
} else {
|
|
range_foreach(sapigs_port_range, range_delete_callback, NULL);
|
|
wmem_free(wmem_epan_scope(), sapigs_port_range);
|
|
}
|
|
|
|
sapigs_port_range = range_copy(wmem_epan_scope(), global_sapigs_port_range);
|
|
range_foreach(sapigs_port_range, range_add_callback, NULL);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|