forked from osmocom/wireshark
158 lines
4.3 KiB
C
158 lines
4.3 KiB
C
/* packet-dxl.c
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*
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* Routines for DXL dissection
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* Github projects:
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* https://github.com/opendxl
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*
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* Copyright 2018, Dario Lombardo <lomato@gmail.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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* 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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#include <epan/tvbuff.h>
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#include <epan/expert.h>
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void proto_register_dxl(void);
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void proto_reg_handoff_dxl(void);
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static int proto_dxl = -1;
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static int hf_dxl_version = -1;
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static int hf_dxl_type = -1;
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static gint ett_dxl = -1;
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static expert_field ei_dxl_unsupported = EI_INIT;
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static dissector_handle_t msgpack_handle;
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#define DXL_REQUEST 0
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#define DXL_RESPONSE 1
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#define DXL_EVENT 2
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#define DXL_ERROR 3
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static const value_string dxl_message_types[] = {
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{ DXL_REQUEST, "Request" },
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{ DXL_RESPONSE, "Response" },
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{ DXL_EVENT, "Event" },
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{ DXL_ERROR, "Error" },
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{ 0, NULL }
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};
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static void dissect_dxl_event(tvbuff_t* tvb, packet_info* pinfo, proto_tree* dxl_tree, gint* offset)
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{
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tvbuff_t* tvb_msgpack;
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tvb_msgpack = tvb_new_subset_remaining(tvb, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Message ID");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Client ID");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Source Broker ID");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Broker IDs");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Client IDs");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Payload");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Reply to topic");
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tvb_msgpack = tvb_new_subset_remaining(tvb_msgpack, *offset);
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*offset = call_dissector_with_data(msgpack_handle, tvb_msgpack, pinfo, dxl_tree, "Service ID");
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}
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static int dissect_dxl(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_)
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{
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gint offset = 0;
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proto_item* ti;
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proto_tree* dxl_tree;
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guint8 type;
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ti = proto_tree_add_item(tree, proto_dxl, tvb, 0, -1, ENC_NA);
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dxl_tree = proto_item_add_subtree(ti, ett_dxl);
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proto_tree_add_item(dxl_tree, hf_dxl_version, tvb, offset, 1, ENC_NA);
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offset += 1;
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type = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(dxl_tree, hf_dxl_type, tvb, offset, 1, ENC_NA);
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offset += 1;
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switch (type) {
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case DXL_REQUEST:
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case DXL_RESPONSE:
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case DXL_ERROR:
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expert_add_info_format(pinfo, tree, &ei_dxl_unsupported, "Type 0x%x is unsupported", type);
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break;
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case DXL_EVENT:
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dissect_dxl_event(tvb, pinfo, dxl_tree, &offset);
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break;
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}
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return offset;
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}
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void proto_reg_handoff_dxl(void)
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{
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msgpack_handle = find_dissector("msgpack");
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}
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void proto_register_dxl(void)
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{
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expert_module_t* expert_dxl;
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static hf_register_info hf[] = {
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{ &hf_dxl_version,
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{ "Version", "dxl.version", FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL }
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},
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{ &hf_dxl_type,
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{ "Type", "dxl.type", FT_UINT8, BASE_HEX, VALS(dxl_message_types), 0x00, NULL, HFILL }
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}
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};
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static gint* ett[] = {
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&ett_dxl
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};
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proto_dxl = proto_register_protocol("Data Exchange Layer", "DXL", "dxl");
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register_dissector("dxl", dissect_dxl, proto_dxl);
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proto_register_field_array(proto_dxl, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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static ei_register_info ei[] = {
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{ &ei_dxl_unsupported, { "dxl.type.unsupported", PI_UNDECODED, PI_WARN, "Unsupported DXL message", EXPFILL }}
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};
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expert_dxl = expert_register_protocol(proto_dxl);
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expert_register_field_array(expert_dxl, ei, array_length(ei));
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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: 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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