1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2014 Microsoft Corporation. All Rights Reserved.
//
// Module Name:
// ClassifyFunctions_FlowAssocationCallouts.cpp
//
// Abstract:
// This module contains WFP Classify functions for associating contexts with flows.
//
// Naming Convention:
//
// <Module><Scenario>
//
// i.e.
//
// ClassifyFlowAssociation
//
// <Module>
// Classify - Function is an FWPS_CALLOUT_CLASSIFY_FN.
// Perform - Executes the desired scenario.
// <Scenario>
// FlowAssociation - Function demonstates associating contexts with flows.
//
// Private Functions:
// PerformFlowAssociation(),
//
// Public Functions:
// ClassifyFlowAssociation(),
//
// Author:
// Dusty Harper (DHarper)
//
// Revision History:
//
// [ Month ][Day] [Year] - [Revision]-[ Comments ]
// December 13, 2013 - 1.1 - Creation
//
////////////////////////////////////////////////////////////////////////////////////////////////////
#include "Framework_WFPSamplerCalloutDriver.h" /// .
#include "ClassifyFunctions_FlowAssociationCallouts.tmh" /// $(OBJ_PATH)\$(O)\
NTSTATUS PerformFlowAssociation(_In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata,
_In_ const PC_FLOW_ASSOCIATION_DATA* pFlowAssociationData)
{
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> PerformFlowAssociation()\n");
#endif /// DBG
NT_ASSERT(pMetadata);
NT_ASSERT(pFlowAssociationData);
NTSTATUS status = STATUS_SUCCESS;
if(FWPS_IS_METADATA_FIELD_PRESENT(pMetadata,
FWPS_METADATA_FIELD_FLOW_HANDLE))
{
for(UINT32 index = 0;
index < pFlowAssociationData->itemCount;
index++)
{
FLOW_CONTEXT* pFlowContext = 0;
#pragma warning(push)
#pragma warning(disable: 6014) /// pNotifyData is expected to be cleaned up by NotifyFlowDeleteNotification
status = KrnlHlprFlowContextCreate(&pFlowContext,
pMetadata->flowHandle,
pFlowAssociationData->pLayerIDs[index],
pFlowAssociationData->pCalloutIDs[index],
CONTEXT_TYPE_DEFAULT,
pFlowAssociationData);
HLPR_BAIL_ON_FAILURE(status);
#pragma warning(pop)
}
}
HLPR_BAIL_LABEL:
#if DBG
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- PerformFlowAssociation() [status: %#x]\n",
status);
#endif /// DBG
return status;
}
#if(NTDDI_VERSION >= NTDDI_WIN7)
/**
@classify_function="ClassifyFlowAssociation"
Purpose: Associates a context with a flow which is available for each of the layers
specified in the provider context <br>
<br>
Notes: Applies to the following layers: <br>
FWPS_LAYER_ALE_FLOW_ESTABLISHED_V{4/6} <br>
<br>
MSDN_Ref: <br>
*/
_IRQL_requires_min_(PASSIVE_LEVEL)
_IRQL_requires_max_(DISPATCH_LEVEL)
_IRQL_requires_same_
VOID NTAPI ClassifyFlowAssociation(_In_ const FWPS_INCOMING_VALUES0* pClassifyValues,
_In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata,
_Inout_opt_ VOID* pNetBufferList,
_In_opt_ const VOID* pClassifyContext,
_In_ const FWPS_FILTER* pFilter,
_In_ UINT64 flowContext,
_Inout_ FWPS_CLASSIFY_OUT0* pClassifyOut)
{
NT_ASSERT(pClassifyValues);
NT_ASSERT(pClassifyValues->layerId == FWPS_LAYER_ALE_FLOW_ESTABLISHED_V4 ||
pClassifyValues->layerId == FWPS_LAYER_ALE_FLOW_ESTABLISHED_V6);
NT_ASSERT(pMetadata);
NT_ASSERT(pFilter);
NT_ASSERT(pFilter->providerContext);
NT_ASSERT(pFilter->providerContext->type == FWPM_GENERAL_CONTEXT);
NT_ASSERT(pFilter->providerContext->dataBuffer);
NT_ASSERT(pFilter->providerContext->dataBuffer);
NT_ASSERT(pFilter->providerContext->dataBuffer->size == sizeof(PC_FLOW_ASSOCIATION_DATA));
NT_ASSERT(pFilter->providerContext->dataBuffer->data);
NT_ASSERT(pClassifyOut);
UNREFERENCED_PARAMETER(pNetBufferList);
UNREFERENCED_PARAMETER(pClassifyContext);
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> ClassifyFlowAssociation() [Layer: %s][FilterID: %#I64x][Rights: %#x]",
KrnlHlprFwpsLayerIDToString(pClassifyValues->layerId),
pFilter->filterId,
pClassifyOut->rights);
if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE)
{
pClassifyOut->actionType = FWP_ACTION_CONTINUE;
/// ensure we only associate the context once
if(flowContext == 0 &&
!(pClassifyValues->incomingValue[FWPS_FIELD_ALE_FLOW_ESTABLISHED_V4_FLAGS].value.uint32 & FWP_CONDITION_FLAG_IS_REAUTHORIZE))
PerformFlowAssociation(pMetadata,
(PC_FLOW_ASSOCIATION_DATA*)pFilter->providerContext->dataBuffer->data);
}
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- ClassifyFlowAssociation() [Layer: %s][FilterID: %#I64x][Action: %#x][Rights: %#x][Absorb: %s]\n",
KrnlHlprFwpsLayerIDToString(pClassifyValues->layerId),
pFilter->filterId,
pClassifyOut->actionType,
pClassifyOut->rights,
(pClassifyOut->flags & FWPS_CLASSIFY_OUT_FLAG_ABSORB) ? "TRUE" : "FALSE");
return;
}
#else
/**
@classify_function="ClassifyFlowAssociation"
Purpose: Associates a context with a flow which is available for each of the layers
specified in the provider context <br>
<br>
Notes: Applies to the following layers: <br>
FWPS_LAYER_ALE_FLOW_ESTABLISHED_V{4/6} <br>
<br>
MSDN_Ref: <br>
*/
_IRQL_requires_min_(PASSIVE_LEVEL)
_IRQL_requires_max_(DISPATCH_LEVEL)
_IRQL_requires_same_
VOID NTAPI ClassifyFlowAssociation(_In_ const FWPS_INCOMING_VALUES* pClassifyValues,
_In_ const FWPS_INCOMING_METADATA_VALUES* pMetadata,
_Inout_opt_ VOID* pNetBufferList,
_In_ const FWPS_FILTER* pFilter,
_In_ UINT64 flowContext,
_Inout_ FWPS_CLASSIFY_OUT* pClassifyOut)
{
NT_ASSERT(pClassifyValues);
NT_ASSERT(pClassifyValues->layerId == FWPS_LAYER_ALE_FLOW_ESTABLISHED_V4 ||
pClassifyValues->layerId == FWPS_LAYER_ALE_FLOW_ESTABLISHED_V6);
NT_ASSERT(pMetadata);
NT_ASSERT(pFilter);
NT_ASSERT(pFilter->providerContext);
NT_ASSERT(pFilter->providerContext->type == FWPM_GENERAL_CONTEXT);
NT_ASSERT(pFilter->providerContext->dataBuffer);
NT_ASSERT(pFilter->providerContext->dataBuffer);
NT_ASSERT(pFilter->providerContext->dataBuffer->size == sizeof(PC_FLOW_ASSOCIATION_DATA));
NT_ASSERT(pFilter->providerContext->dataBuffer->data);
NT_ASSERT(pClassifyOut);
UNREFERENCED_PARAMETER(pNetBufferList);
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" ---> ClassifyFlowAssociation() [Layer: %s][FilterID: %#I64x][Rights: %#x]",
KrnlHlprFwpsLayerIDToString(pClassifyValues->layerId),
pFilter->filterId,
pClassifyOut->rights);
if(pClassifyOut->rights & FWPS_RIGHT_ACTION_WRITE)
{
pClassifyOut->actionType = FWP_ACTION_CONTINUE;
/// ensure we only associate the context once
if(flowContext == 0 &&
!(pClassifyValues->incomingValue[FWPS_FIELD_ALE_FLOW_ESTABLISHED_V4_FLAGS].value.uint32 & FWP_CONDITION_FLAG_IS_REAUTHORIZE))
PerformFlowAssociation(pMetadata,
(PC_FLOW_ASSOCIATION_DATA*)pFilter->providerContext->dataBuffer->data);
}
DbgPrintEx(DPFLTR_IHVNETWORK_ID,
DPFLTR_INFO_LEVEL,
" <--- ClassifyFlowAssociation() [Layer: %s][FilterID: %#I64x][Action: %#x][Rights: %#x][Absorb: %s]\n",
KrnlHlprFwpsLayerIDToString(pClassifyValues->layerId),
pFilter->filterId,
pClassifyOut->actionType,
pClassifyOut->rights,
(pClassifyOut->flags & FWPS_CLASSIFY_OUT_FLAG_ABSORB) ? "TRUE" : "FALSE");
return;
}
#endif /// (NTDDI_VERSION >= NTDDI_WIN7)
|
