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/* Packet-rdp_cliprdr.c
* Routines for the clipboard redirection RDP channel
* Copyright 2023, David Fort <contact@hardening-consulting.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* See: "[MS-RDPECLIP] "
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/conversation.h>
#include <epan/expert.h>
#include <epan/value_string.h>
#include "packet-rdpudp.h"
#define PNAME "RDP clipboard redirection channel Protocol"
#define PSNAME "cliprdr"
#define PFNAME "rdp_cliprdr"
void proto_register_rdp_cliprdr(void);
void proto_reg_handoff_rdp_cliprdr(void);
static int proto_rdp_cliprdr = -1;
static int hf_cliprdr_msgType = -1;
static int hf_cliprdr_msgFlags = -1;
static int hf_cliprdr_dataLen = -1;
static int ett_rdp_cliprdr = -1;
enum {
CB_MONITOR_READY = 0x0001,
CB_FORMAT_LIST = 0x0002,
CB_FORMAT_LIST_RESPONSE = 0x0003,
CB_FORMAT_DATA_REQUEST = 0x0004,
CB_FORMAT_DATA_RESPONSE = 0x0005,
CB_TEMP_DIRECTORY = 0x0006,
CB_CLIP_CAPS = 0x0007,
CB_FILECONTENTS_REQUEST = 0x0008,
CB_FILECONTENTS_RESPONSE = 0x0009,
CB_LOCK_CLIPDATA = 0x000A,
CB_UNLOCK_CLIPDATA = 0x000B,
};
static const value_string rdp_cliprdr_order_vals[] = {
{ CB_MONITOR_READY, "Monitor ready"},
{ CB_FORMAT_LIST, "Format list"},
{ CB_FORMAT_LIST_RESPONSE, "Format list response"},
{ CB_FORMAT_DATA_REQUEST, "Format data request"},
{ CB_FORMAT_DATA_RESPONSE, "Format data response"},
{ CB_TEMP_DIRECTORY, "Temporary directory"},
{ CB_CLIP_CAPS, "Capabilities"},
{ CB_FILECONTENTS_REQUEST, "File content request"},
{ CB_FILECONTENTS_RESPONSE, "File content response"},
{ CB_LOCK_CLIPDATA, "Lock clipdata"},
{ CB_UNLOCK_CLIPDATA, "Unlock clipdata"},
{ 0x0, NULL},
};
static const value_string msgFlags_vals[] = {
{ 0x0000, "" },
{ 0x0001, "CB_RESPONSE_OK" },
{ 0x0002, "CB_RESPONSE_FAIL" },
{ 0x0004, "CB_ASCII_NAMES" },
{ 0x0, NULL},
};
static int
dissect_rdp_cliprdr(tvbuff_t *tvb _U_, packet_info *pinfo, proto_tree *parent_tree _U_, void *data _U_)
{
proto_item *item;
gint nextOffset, offset = 0;
guint32 cmdId = 0;
guint32 pduLength;
proto_tree *tree;
parent_tree = proto_tree_get_root(parent_tree);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "CLIPRDR");
col_clear(pinfo->cinfo, COL_INFO);
pduLength = tvb_get_guint32(tvb, offset + 4, ENC_LITTLE_ENDIAN) + 8;
nextOffset = offset + pduLength;
item = proto_tree_add_item(parent_tree, proto_rdp_cliprdr, tvb, offset, pduLength, ENC_NA);
tree = proto_item_add_subtree(item, ett_rdp_cliprdr);
proto_tree_add_item_ret_uint(tree, hf_cliprdr_msgType, tvb, offset, 2, ENC_LITTLE_ENDIAN, &cmdId);
offset += 2;
proto_tree_add_item(tree, hf_cliprdr_msgFlags, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_cliprdr_dataLen, tvb, offset, 4, ENC_LITTLE_ENDIAN);
//offset += 4;
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str_const(cmdId, rdp_cliprdr_order_vals, "Unknown clipboard command"));
switch (cmdId) {
case CB_MONITOR_READY:
case CB_FORMAT_LIST:
case CB_FORMAT_LIST_RESPONSE:
case CB_FORMAT_DATA_REQUEST:
case CB_FORMAT_DATA_RESPONSE:
case CB_TEMP_DIRECTORY:
case CB_CLIP_CAPS:
case CB_FILECONTENTS_REQUEST:
case CB_FILECONTENTS_RESPONSE:
case CB_LOCK_CLIPDATA:
case CB_UNLOCK_CLIPDATA:
default:
break;
}
offset = nextOffset;
return offset;
}
void proto_register_rdp_cliprdr(void) {
static hf_register_info hf[] = {
{ &hf_cliprdr_msgType,
{ "OrderType", "rdp_cliprdr.ordertype",
FT_UINT16, BASE_HEX, VALS(rdp_cliprdr_order_vals), 0x0,
NULL, HFILL }
},
{ &hf_cliprdr_msgFlags,
{ "Flags", "rdp_cliprdr.msgflags",
FT_UINT16, BASE_HEX, VALS(msgFlags_vals), 0x0,
NULL, HFILL }
},
{ &hf_cliprdr_dataLen,
{ "dataLen", "rdp_cliprdr.datalen",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
};
static gint *ett[] = {
&ett_rdp_cliprdr,
};
proto_rdp_cliprdr = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_rdp_cliprdr, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("rdp_cliprdr", dissect_rdp_cliprdr, proto_rdp_cliprdr);
}
void proto_reg_handoff_rdp_cliprdr(void) {
}
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