136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* packet-drb.c
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*
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* Routines for Ruby Marshal Object
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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 <file-rbm.h>
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static dissector_handle_t drb_handle;
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static int proto_drb = -1;
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static int hf_drb_len = -1;
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static gint ett_drb = -1;
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static gint ett_ref = -1;
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void proto_register_drb(void);
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void proto_reg_handoff_drb(void);
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static void dissect_drb_object(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, guint* offset, const gchar* label)
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{
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guint32 len;
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proto_tree* obj_tree;
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gchar* type;
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gchar* value;
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len = tvb_get_guint32(tvb, *offset, ENC_BIG_ENDIAN);
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obj_tree = proto_tree_add_subtree(tree, tvb, *offset, 4 + len, ett_ref, NULL, label);
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proto_tree_add_item(obj_tree, hf_drb_len, tvb, *offset, 4, ENC_NA);
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*offset += 4;
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dissect_rbm_inline(tvb, pinfo, obj_tree, offset, &type, &value);
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if (type)
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proto_item_append_text(obj_tree, "Type: %s", type);
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if (value)
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proto_item_append_text(obj_tree, "Value: %s", value);
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}
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static void dissect_drb_response(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, guint* offset)
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{
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col_append_str(pinfo->cinfo, COL_INFO, " (response)");
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dissect_drb_object(tvb, pinfo, tree, offset, "Success");
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dissect_drb_object(tvb, pinfo, tree, offset, "Response");
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}
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static void dissect_drb_request(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, guint* offset)
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{
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gint32 nargs;
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gint32 i;
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gint len;
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gchar* loop_label;
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col_append_str(pinfo->cinfo, COL_INFO, " (request)");
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dissect_drb_object(tvb, pinfo, tree, offset, "Ref");
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dissect_drb_object(tvb, pinfo, tree, offset, "Msg ID");
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get_rbm_integer(tvb, *offset + 4 + 3, &nargs, &len);
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dissect_drb_object(tvb, pinfo, tree, offset, "Arg length");
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for (i = 0; i < nargs; i++) {
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loop_label = wmem_strdup_printf(pinfo->pool, "Arg %d", i + 1);
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dissect_drb_object(tvb, pinfo, tree, offset, loop_label);
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}
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dissect_drb_object(tvb, pinfo, tree, offset, "Block");
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}
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static int dissect_drb(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data _U_)
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{
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guint offset = 0;
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proto_tree* ti;
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proto_tree* drb_tree;
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guint8 type;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "DRb");
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col_clear(pinfo->cinfo, COL_INFO);
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col_set_str(pinfo->cinfo, COL_INFO, "Distributed Ruby");
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ti = proto_tree_add_item(tree, proto_drb, tvb, 0, -1, ENC_NA);
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drb_tree = proto_item_add_subtree(ti, ett_drb);
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type = tvb_get_guint8(tvb, 6);
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if (type == 'T' || type == 'F') {
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dissect_drb_response(tvb, pinfo, drb_tree, &offset);
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} else {
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dissect_drb_request(tvb, pinfo, drb_tree, &offset);
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}
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return offset;
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}
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void proto_register_drb(void)
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{
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static hf_register_info hf[] = {
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{ &hf_drb_len,
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{ "Length", "drb.length", FT_UINT32, BASE_DEC, NULL, 0x00, 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_drb,
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&ett_ref
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};
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proto_drb = proto_register_protocol("Distributed Ruby", "DRb", "drb");
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drb_handle = register_dissector("drb", dissect_drb, proto_drb);
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proto_register_field_array(proto_drb, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_drb(void)
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{
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dissector_add_for_decode_as_with_preference("tcp.port", drb_handle);
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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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