9bcac48403
Started by grepping call_dissector_with_data, call_dissector_only and call_dissector and traced the handles passed into them to a find_dissector within the dissector. Then replaced find_dissector with find_dissector_add_dependency and added the protocol id from the dissector. "data" dissector was not considered to be a dependency. Change-Id: I15d0d77301306587ef8e7af5876e74231816890d Reviewed-on: https://code.wireshark.org/review/14509 Petri-Dish: Michael Mann <mmann78@netscape.net> Reviewed-by: Michael Mann <mmann78@netscape.net>
211 lines
6.5 KiB
C
211 lines
6.5 KiB
C
/* packet-lge_monitor.c
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* Routines for LGE Monitor packet dissection
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* Copyright 2006, Anders Broman <anders.broman[at]ericsson.com>
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* LGE Monitor is a trace tool from Nortel.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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void proto_reg_handoff_lge_monitor(void);
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void proto_register_lge_monitor(void);
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/* Initialize the protocol and registered fields */
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static int proto_lge_monitor = -1;
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static int hf_lge_monitor_dir = -1;
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static int hf_lge_monitor_prot = -1;
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static int hf_lge_monitor_length = -1;
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static int hf_lge_monitor_data = -1;
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/* Initialize the subtree pointers */
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static int ett_lge_monitor = -1;
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static int ett_lge_header = -1;
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static guint LGEMonitorUDPPort = 0;
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static dissector_handle_t mtp3_handle, m3ua_handle, sccp_handle, sctp_handle;
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static const value_string lge_monitor_dir_vals[] = {
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{ 0x00, "TX(Transmit Message Signaling Unit)" },
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{ 0x01, "RX(Receive Message Signaling Unit)" },
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{ 0, NULL }
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};
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static const value_string lge_monitor_prot_vals[] = {
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{ 0x00, "MTP-3(Message Transfer Part 3)" },
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{ 0x01, "SCCP(Signaling Connection Control Part)"},
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{ 0x02, "SCTP(Stream Control Transmission Protocol)"},
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{ 0x03, "M3UA(MTP-3 User Adaptation)"},
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{ 0, NULL }
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};
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#define LGEMON_PROTO_HEADER_LENGTH 12
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/* Code to actually dissect the packets */
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static int
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dissect_lge_monitor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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guint32 lge_monitor_proto_id;
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tvbuff_t* next_tvb = NULL;
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proto_tree* header_tree;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *lge_monitor_tree;
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LGE Monitor");
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ti = proto_tree_add_item(tree, proto_lge_monitor, tvb, 0, LGEMON_PROTO_HEADER_LENGTH, ENC_NA);
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lge_monitor_tree = proto_item_add_subtree(ti, ett_lge_monitor);
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header_tree = proto_tree_add_subtree(lge_monitor_tree, tvb, offset, LGEMON_PROTO_HEADER_LENGTH, ett_lge_header, NULL, "LGE Monitor PDU");
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proto_tree_add_item(header_tree, hf_lge_monitor_dir, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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lge_monitor_proto_id = tvb_get_ntohl(tvb,offset);
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proto_tree_add_item(header_tree, hf_lge_monitor_prot, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(header_tree, hf_lge_monitor_length, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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switch (lge_monitor_proto_id){
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case 0: /* MTP3 */
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call_dissector(mtp3_handle, next_tvb, pinfo, tree);
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break;
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case 1: /* SCCP */
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call_dissector(sccp_handle, next_tvb, pinfo, tree);
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break;
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case 2: /* SCTP */
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call_dissector(sctp_handle, next_tvb, pinfo, tree);
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break;
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case 3: /* M3UA */
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call_dissector(m3ua_handle, next_tvb, pinfo, tree);
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break;
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default:
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proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_data, tvb, offset, -1, ENC_NA);
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break;
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_reg_handoff_lge_monitor(void)
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{
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static dissector_handle_t lge_monitor_handle;
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static guint saved_udp_port;
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static gboolean lge_monitor_prefs_initialized = FALSE;
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if (!lge_monitor_prefs_initialized) {
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lge_monitor_handle = create_dissector_handle(dissect_lge_monitor, proto_lge_monitor);
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dissector_add_for_decode_as("udp.port", lge_monitor_handle);
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mtp3_handle = find_dissector_add_dependency("mtp3", proto_lge_monitor);
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m3ua_handle = find_dissector_add_dependency("m3ua", proto_lge_monitor);
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sccp_handle = find_dissector_add_dependency("sccp", proto_lge_monitor);
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sctp_handle = find_dissector_add_dependency("sctp", proto_lge_monitor);
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lge_monitor_prefs_initialized = TRUE;
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}
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else {
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if (saved_udp_port != 0) {
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dissector_delete_uint("udp.port", saved_udp_port, lge_monitor_handle);
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}
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}
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if (LGEMonitorUDPPort != 0) {
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dissector_add_uint("udp.port", LGEMonitorUDPPort, lge_monitor_handle);
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}
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saved_udp_port = LGEMonitorUDPPort;
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}
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void
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proto_register_lge_monitor(void)
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{
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module_t *lge_monitor_module;
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_lge_monitor_dir,
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{ "Direction", "lge_monitor.dir",
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FT_UINT32, BASE_DEC, VALS(lge_monitor_dir_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_lge_monitor_prot,
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{ "Protocol Identifier", "lge_monitor.prot",
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FT_UINT32, BASE_DEC, VALS(lge_monitor_prot_vals), 0x0,
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NULL, HFILL }
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},
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{ &hf_lge_monitor_length,
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{ "Payload Length", "lge_monitor.length",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_lge_monitor_data,
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{ "LGE Monitor data", "lge_monitor.monitor_data",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_lge_monitor,
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&ett_lge_header
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};
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/* Register the protocol name and description */
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proto_lge_monitor = proto_register_protocol("LGE Monitor","LGE_Monitor", "lge_monitor");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_lge_monitor, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Register a configuration option for port */
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lge_monitor_module = prefs_register_protocol(proto_lge_monitor, proto_reg_handoff_lge_monitor);
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prefs_register_uint_preference(lge_monitor_module, "udp.port",
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"LGE Monitor UDP Port",
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"Set UDP port for LGE Monitor messages",
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10,
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&LGEMonitorUDPPort);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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