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wireshark/epan/dissectors/packet-dcom-remunkn.c

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/* packet-dcom-remunkn.c
* Routines for the IRemUnknown interface
* Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* see packet-dcom.c for details about DCOM */
#include "config.h"
#include <epan/packet.h>
#include "packet-dcerpc.h"
#include "packet-dcom.h"
void proto_register_remunk(void);
void proto_reg_handoff_remunk(void);
static int hf_remunk_opnum = -1;
static int hf_remunk_refs = -1;
static int hf_remunk_iids = -1;
/* static int hf_remunk_flags = -1; */
static int hf_remunk_qiresult = -1;
static gint ett_remunk_reminterfaceref = -1;
static int hf_remunk_reminterfaceref = -1;
static int hf_remunk_interface_refs = -1;
static int hf_remunk_public_refs = -1;
static int hf_remunk_private_refs = -1;
static gint ett_remunk_rqi_result = -1;
static gint ett_remunk = -1;
static e_guid_t uuid_remunk = { 0x00000131, 0x0000, 0x0000, { 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46 } };
static guint16 ver_remunk = 0;
static int proto_remunk = -1;
static e_guid_t ipid_remunk = { 0x00000131, 0x1234, 0x5678, { 0xCA, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46 } };
/* There is a little bit confusion about the IRemUnknown2 interface UUIDs */
/* DCOM documentation tells us: 0x00000142 (7 methods) */
/* win2000 registry tells us: 0x00000142 IRemoteQI (4 methods) */
/* win2000 registry tells us: 0x00000143 IRemUnknown2 (7 methods) */
/* There is some evidence, that the DCOM documentation is wrong, so using 143 for IRemUnknown2 now. */
static gint ett_remunk2 = -1;
static e_guid_t uuid_remunk2 = { 0x00000143, 0x0000, 0x0000, { 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46 } };
static guint16 ver_remunk2 = 0;
static int proto_remunk2 = -1;
typedef struct remunk_remqueryinterface_call_s {
guint iid_count;
e_guid_t *iids;
} remunk_remqueryinterface_call_t;
static int
dissect_remunk_remqueryinterface_rqst(tvbuff_t *tvb, int offset,
packet_info *pinfo, proto_tree *tree, dcerpc_info *di, guint8 *drep)
{
e_guid_t ipid;
guint32 u32Refs;
guint16 u16IIDs;
guint32 u32ArraySize;
guint32 u32ItemIdx;
e_guid_t iid;
remunk_remqueryinterface_call_t *call;
offset = dissect_dcom_this(tvb, offset, pinfo, tree, di, drep);
offset = dissect_dcom_UUID(tvb, offset, pinfo, tree, di, drep,
hf_dcom_ipid, &ipid);
offset = dissect_dcom_DWORD(tvb, offset, pinfo, tree, di, drep,
hf_remunk_refs, &u32Refs);
offset = dissect_dcom_WORD(tvb, offset, pinfo, tree, di, drep,
hf_remunk_iids, &u16IIDs);
offset = dissect_dcom_dcerpc_array_size(tvb, offset, pinfo, tree, di, drep,
&u32ArraySize);
/* limit the allocation to a reasonable size */
if(u32ArraySize < 100) {
call = (remunk_remqueryinterface_call_t *)wmem_alloc0(wmem_file_scope(), sizeof(remunk_remqueryinterface_call_t) + u32ArraySize * sizeof(e_guid_t));
call->iid_count = u32ArraySize;
call->iids = (e_guid_t *) (call+1);
di->call_data->private_data = call;
} else {
call = NULL;
}
for (u32ItemIdx = 0; u32ArraySize--; u32ItemIdx++) {
offset = dissect_dcom_append_UUID(tvb, offset, pinfo, tree, di, drep,
hf_dcom_iid, u32ItemIdx+1, &iid);
if(call != NULL) {
call->iids[u32ItemIdx] = iid;
}
}
return offset;
}
static int
dissect_remunk_remqueryinterface_resp(tvbuff_t *tvb, int offset,
packet_info *pinfo, proto_tree *tree, dcerpc_info *di, guint8 *drep)
{
guint32 u32Pointer;
guint32 u32ArraySize;
guint32 u32ItemIdx;
proto_item *sub_item;
proto_tree *sub_tree;
guint32 u32HResult;
guint32 u32SubStart;
e_guid_t iid;
e_guid_t iid_null = DCERPC_UUID_NULL;
remunk_remqueryinterface_call_t *call = (remunk_remqueryinterface_call_t *)di->call_data->private_data;
guint64 oxid;
guint64 oid;
e_guid_t ipid;
offset = dissect_dcom_that(tvb, offset, pinfo, tree, di, drep);
offset = dissect_dcom_dcerpc_pointer(tvb, offset, pinfo, tree, di, drep,
&u32Pointer);
offset = dissect_dcom_dcerpc_array_size(tvb, offset, pinfo, tree, di, drep,
&u32ArraySize);
u32ItemIdx = 1;
while (u32ArraySize--) {
/* add subtree */
sub_item = proto_tree_add_item(tree, hf_remunk_qiresult, tvb, offset, 0, ENC_NA);
sub_tree = proto_item_add_subtree(sub_item, ett_remunk_rqi_result);
/* REMQIRESULT */
offset = dissect_dcom_HRESULT(tvb, offset, pinfo, sub_tree, di, drep,
&u32HResult);
u32SubStart = offset - 4;
offset = dissect_dcom_dcerpc_pointer(tvb, offset, pinfo, sub_tree, di, drep,
&u32Pointer);
/* try to read the iid from the request */
if(call != NULL && u32ItemIdx <= call->iid_count) {
iid = call->iids[u32ItemIdx-1];
} else {
iid = iid_null;
}
/* XXX - this doesn't seem to be dependent on the pointer above?!? */
/*if (u32Pointer) {*/
offset = dissect_dcom_STDOBJREF(tvb, offset, pinfo, sub_tree, di, drep, 0 /* hfindex */,
&oxid, &oid, &ipid);
/*}*/
/* add interface instance to database (we currently only handle IPv4) */
if(pinfo->net_src.type == AT_IPv4) {
dcom_interface_new(pinfo,
&pinfo->net_src,
&iid, oxid, oid, &ipid);
}
/* update subtree */
proto_item_append_text(sub_item, "[%u]: %s",
u32ItemIdx,
val_to_str(u32HResult, dcom_hresult_vals, "Unknown (0x%08x)") );
proto_item_set_len(sub_item, offset - u32SubStart);
/* update column info now */
col_append_fstr(pinfo->cinfo, COL_INFO, " %s[%u]",
val_to_str(u32HResult, dcom_hresult_vals, "Unknown (0x%08x)"),
u32ItemIdx);
u32ItemIdx++;
}
/* HRESULT of call */
offset = dissect_dcom_HRESULT(tvb, offset, pinfo, tree, di, drep,
&u32HResult);
/* update column info now */
col_append_fstr(pinfo->cinfo, COL_INFO, " -> %s",
val_to_str(u32HResult, dcom_hresult_vals, "Unknown (0x%08x)"));
return offset;
}
static int
dissect_remunk_remrelease_rqst(tvbuff_t *tvb, int offset,
packet_info *pinfo, proto_tree *tree, dcerpc_info *di, guint8 *drep)
{
guint32 u32Pointer;
guint32 u32IntRefs;
guint32 u32ItemIdx;
e_guid_t ipid;
guint32 u32PublicRefs;
guint32 u32PrivateRefs;
const gchar *pszFormat;
proto_item *sub_item;
proto_tree *sub_tree;
guint32 u32SubStart;
offset = dissect_dcom_this(tvb, offset, pinfo, tree, di, drep);
offset = dissect_dcom_dcerpc_pointer(tvb, offset, pinfo, tree, di, drep,
&u32Pointer);
offset = dissect_dcom_DWORD(tvb, offset, pinfo, tree, di, drep,
hf_remunk_interface_refs, &u32IntRefs);
/* update column info now */
if (u32IntRefs) {
col_append_fstr(pinfo->cinfo, COL_INFO, " Cnt=%u Refs=", u32IntRefs);
} else {
col_append_str(pinfo->cinfo, COL_INFO, " Cnt=0");
}
u32ItemIdx = 1;
while (u32IntRefs--) {
/* add subtree */
sub_item = proto_tree_add_item(tree, hf_remunk_reminterfaceref, tvb, offset, 0, ENC_NA);
sub_tree = proto_item_add_subtree(sub_item, ett_remunk_reminterfaceref);
u32SubStart = offset;
offset = dissect_dcom_UUID(tvb, offset, pinfo, sub_tree, di, drep,
hf_dcom_ipid, &ipid);
offset = dissect_dcom_DWORD(tvb, offset, pinfo, sub_tree, di, drep,
hf_remunk_public_refs, &u32PublicRefs);
offset = dissect_dcom_DWORD(tvb, offset, pinfo, sub_tree, di, drep,
hf_remunk_private_refs, &u32PrivateRefs);
/* update subtree */
proto_item_append_text(sub_item, "[%u]: IPID=%s, PublicRefs=%u, PrivateRefs=%u",
u32ItemIdx,
guids_resolve_guid_to_str(&ipid, pinfo->pool),
u32PublicRefs, u32PrivateRefs);
proto_item_set_len(sub_item, offset - u32SubStart);
/* update column info now */
pszFormat = "";
if (u32ItemIdx == 1) {
pszFormat = "%u-%u";
} else if (u32ItemIdx < 10) {
pszFormat = ",%u-%u";
} else if (u32ItemIdx == 10) {
pszFormat = ",...";
}
col_append_fstr(pinfo->cinfo, COL_INFO, pszFormat, u32PublicRefs, u32PrivateRefs);
u32ItemIdx++;
}
return offset;
}
/* sub dissector table of IRemUnknown interface */
static dcerpc_sub_dissector remunk_dissectors[] = {
{ 0, "QueryInterface", NULL, NULL },
{ 1, "AddRef", NULL, NULL },
{ 2, "Release", NULL, NULL },
{ 3, "RemQueryInterface", dissect_remunk_remqueryinterface_rqst, dissect_remunk_remqueryinterface_resp },
{ 4, "RemAddRef", NULL, NULL },
{ 5, "RemRelease", dissect_remunk_remrelease_rqst, dissect_dcom_simple_resp },
{ 0, NULL, NULL, NULL }
};
/* sub dissector table of IRemUnknown2 interface */
static dcerpc_sub_dissector remunk2_dissectors[] = {
{ 0, "QueryInterface", NULL, NULL },
{ 1, "AddRef", NULL, NULL },
{ 2, "Release", NULL, NULL },
{ 3, "RemQueryInterface", dissect_remunk_remqueryinterface_rqst, dissect_remunk_remqueryinterface_resp },
{ 4, "RemAddRef", NULL, NULL },
{ 5, "RemRelease", dissect_remunk_remrelease_rqst, dissect_dcom_simple_resp },
{ 6, "RemQueryInterface2", NULL, NULL },
{ 0, NULL, NULL, NULL }
};
void
proto_register_remunk (void)
{
static hf_register_info hf_remunk_rqi_array[] = {
{ &hf_remunk_opnum,
{ "Operation", "remunk.opnum", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_refs,
{ "Refs", "remunk.refs", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_iids,
{ "IIDs", "remunk.iids", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_qiresult,
{ "QIResult", "remunk.qiresult", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
#if 0
{ &hf_remunk_flags,
{ "Flags", "remunk.flags", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
#endif
{ &hf_remunk_public_refs,
{ "PublicRefs", "remunk.public_refs", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_reminterfaceref,
{ "RemInterfaceRef", "remunk.reminterfaceref", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_interface_refs,
{ "InterfaceRefs", "remunk.int_refs", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_remunk_private_refs,
{ "PrivateRefs", "remunk.private_refs", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}
};
static gint *ett_remunk_array[] = {
&ett_remunk,
&ett_remunk_rqi_result,
&ett_remunk2,
&ett_remunk_reminterfaceref
};
proto_remunk = proto_register_protocol ("IRemUnknown", "IRemUnknown", "remunk");
proto_register_field_array (proto_remunk, hf_remunk_rqi_array, array_length (hf_remunk_rqi_array));
proto_remunk2 = proto_register_protocol ("IRemUnknown2", "IRemUnknown2", "remunk2");
proto_register_subtree_array (ett_remunk_array, array_length (ett_remunk_array));
}
void
proto_reg_handoff_remunk (void)
{
/* Register the IPID */
guids_add_uuid(&ipid_remunk, "IPID-IRemUnknown");
/* Register the interfaces */
dcerpc_init_uuid(proto_remunk, ett_remunk,
&uuid_remunk, ver_remunk,
remunk_dissectors, hf_remunk_opnum);
dcerpc_init_uuid(proto_remunk2, ett_remunk2,
&uuid_remunk2, ver_remunk2,
remunk2_dissectors, hf_remunk_opnum);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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