forked from osmocom/wireshark
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Change-Id: I0ebc71f240ace38cb6c111c0cc56f20fee10749d Reviewed-on: https://code.wireshark.org/review/28539 Petri-Dish: Anders Broman <a.broman58@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
162 lines
5.8 KiB
C
162 lines
5.8 KiB
C
/* packet-mdp.c
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* Routines for the disassembly of the "Meraki Discovery Protocol (MDP)"
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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 <stdio.h>
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#include <epan/packet.h>
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#define MDP_TLV_TYPE 0
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#define MDP_TLV_LENGTH 1
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#define MDP_TLV_DEVICE_INFO 2
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#define MDP_TLV_NETWORK_INFO 3
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#define MDP_TLV_LONGITUDE 4
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#define MDP_TLV_LATITUDE 5
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#define MDP_TLV_TYPE_SIX 6
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#define MDP_TLV_TYPE_SEVEN 7
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#define MDP_TLV_END 255
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void proto_register_mdp(void);
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void proto_reg_handoff_mdp(void);
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static int proto_mdp = -1;
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static int hf_mdp_preamble_data = -1;
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static int hf_mdp_device_info = -1;
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static int hf_mdp_network_info = -1;
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static int hf_mdp_type = -1;
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static int hf_mdp_length = -1;
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static int hf_mdp_longitude = -1;
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static int hf_mdp_latitude = -1;
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static int hf_mdp_type_six = -1;
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static int hf_mdp_type_seven = -1;
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static int hf_mdp_data = -1;
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static gint ett_mdp = -1;
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static gint ett_mdp_tlv = -1;
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static dissector_handle_t mdp_handle;
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/* Format Identifier */
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static const value_string type_vals[] = {
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{ MDP_TLV_DEVICE_INFO, "Device Info" },
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{ MDP_TLV_NETWORK_INFO, "Network Info" },
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{ MDP_TLV_LONGITUDE, "Longitude" },
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{ MDP_TLV_LATITUDE, "Latitude" },
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{ MDP_TLV_TYPE_SIX, "Type 6 UID" },
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{ MDP_TLV_TYPE_SEVEN, "Type 7 UID" },
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{ MDP_TLV_END, "End" },
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{ 0, NULL }
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};
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static int
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dissect_mdp(tvbuff_t *mdp_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_tree *mdp_tree, *tlv_tree;
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proto_item *mdp_item, *tlv_item;
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guint32 mdp_type, mdp_length;
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gint offset = 0;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "MDP");
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_fstr(pinfo->cinfo, COL_INFO, "MDP");
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mdp_item = proto_tree_add_item(tree, proto_mdp, mdp_tvb, 0, -1, ENC_NA);
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mdp_tree = proto_item_add_subtree(mdp_item, ett_mdp);
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proto_tree_add_item(mdp_tree, hf_mdp_preamble_data, mdp_tvb, 0, 28, ENC_NA);
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offset += 28;
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while(tvb_reported_length_remaining(mdp_tvb, offset) != 0){
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tlv_tree = proto_tree_add_subtree(mdp_tree, mdp_tvb, offset + MDP_TLV_TYPE, -1, ett_mdp_tlv, &tlv_item, "");
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proto_tree_add_item_ret_uint(tlv_tree, hf_mdp_type, mdp_tvb, offset + MDP_TLV_TYPE, 1, ENC_BIG_ENDIAN, &mdp_type);
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proto_item_set_text(tlv_tree, "%s", val_to_str_const(mdp_type, type_vals, "Unknown type"));
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proto_tree_add_item_ret_uint(tlv_tree, hf_mdp_length, mdp_tvb, offset + MDP_TLV_LENGTH, 1, ENC_BIG_ENDIAN, &mdp_length);
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offset += 2;
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switch(mdp_type){
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case MDP_TLV_DEVICE_INFO:
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proto_tree_add_item(tlv_tree, hf_mdp_device_info, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_NETWORK_INFO:
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proto_tree_add_item(tlv_tree, hf_mdp_network_info, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_LONGITUDE:
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proto_tree_add_item(tlv_tree, hf_mdp_longitude, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_LATITUDE:
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proto_tree_add_item(tlv_tree, hf_mdp_latitude, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_TYPE_SIX:
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proto_tree_add_item(tlv_tree, hf_mdp_type_six, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_TYPE_SEVEN:
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proto_tree_add_item(tlv_tree, hf_mdp_type_seven, mdp_tvb, offset, mdp_length, ENC_UTF_8 | ENC_NA);
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break;
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case MDP_TLV_END:
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break;
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default:
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proto_tree_add_item(mdp_tree, hf_mdp_data, mdp_tvb, offset, mdp_length, ENC_NA);
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break;
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}
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proto_item_set_len(tlv_item, mdp_length + 2);
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offset += mdp_length;
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}
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return tvb_captured_length(mdp_tvb);
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}
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void
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proto_register_mdp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_mdp_preamble_data, {"Preamble Data","mdp.preamble_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_device_info, {"Device Info", "mdp.device_info", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_network_info, {"Network Info", "mdp.network_info", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_longitude, {"Longitude", "mdp.longitude", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_latitude, {"Latitude", "mdp.latitude", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_type, {"Type", "mdp.type", FT_UINT8, BASE_DEC, VALS(type_vals), 0x0, NULL, HFILL }},
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{ &hf_mdp_type_six, {"Type 6 UID", "mdp.type_six", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_type_seven, {"Type 7 UID", "mdp.type_seven", FT_STRING, STR_UNICODE, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_length, {"Length", "mdp.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_mdp_data, {"Unknown Data", "mdp.data", FT_BYTES, BASE_NONE, NULL, 0X0, NULL, HFILL }}
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};
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static gint *ett[] = {
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&ett_mdp,
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&ett_mdp_tlv
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};
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proto_mdp = proto_register_protocol("Meraki Discovery Protocol", "MDP", "mdp");
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proto_register_field_array(proto_mdp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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mdp_handle = register_dissector("mdp", dissect_mdp, proto_mdp);
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}
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void
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proto_reg_handoff_mdp(void)
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{
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dissector_add_uint("ethertype", 0x0712, mdp_handle);
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dissector_add_uint("ethertype", 0x0713, mdp_handle);
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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: 4
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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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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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