Sample Code
Windows Driver Samples/ Windows Filtering Platform Sample/ C++/ svc/ Scenarios_FastPacketInjection.cpp/
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 | //////////////////////////////////////////////////////////////////////////////////////////////////// // // Copyright (c) 2012 Microsoft Corporation. All Rights Reserved. // // Module Name: // Scenarios_FastPacketInjection.cpp // // Abstract: // This module contains functions which implements the FAST_PACKET_INJECTION scenarios. // // Naming Convention: // // <Scope><Object><Action><Modifier> // <Scope><Object><Action> // // i.e. // // <Scope> // { // - Function is likely visible to other modules // Prv - Function is private to this module. // } // <Object> // { // ScenarioFastPacketInjection - Function pertains to all of the Fast Packet Injection // Scenarios // RPC - Function is and RPC entry point. // } // <Action> // { // Add - Function adds objects // Remove - Function removes objects // Invoke - Function implements the scenario based on parameters // passed from the commandline interface // (WFPSampler.exe). // } // <Modifier> // { // FwpmObjects - Function acts on WFP objects. // ScenarioFastPacketInjection - Function pertains to all of the Fast Packet Injection // Scenarios // } // // Private Functions: // PrvScenarioFastPacketInjectionAddFwpmObjects(), // PrvScenarioFastPacketInjectionDeleteFwpmObjects(), // ScenarioFastStreamInjectionAdd(), // ScenarioFastStreamInjectionRemove(), // // Public Functions: // RPCInvokeScenarioFastPacketInjection(), // // Author: // Dusty Harper (DHarper) // // Revision History: // // [ Month ][Day] [Year] - [Revision]-[ Comments ] // May 01, 2010 - 1.0 - Creation // //////////////////////////////////////////////////////////////////////////////////////////////////// #include "Framework_WFPSamplerService.h" /// . /** @private_function="PrvScenarioFastPacketInjectionDeleteFwpmObjects" Purpose: Function that disables the SCENARIO_FAST_PACKET_INJECTION scenarios. <br> <br> Notes: Scenario removes the filters using specified filtering conditions at the specified layer. Associated callouts are removed as well. <br> <br> MSDN_Ref: <br> */ _Success_( return == NO_ERROR) UINT32 PrvScenarioFastPacketInjectionDeleteFwpmObjects(_In_ const FWPM_FILTER* pFilter) { ASSERT(pFilter); UINT32 status = NO_ERROR; HANDLE engineHandle = 0; HANDLE enumHandle = 0; UINT32 entryCount = 0; FWPM_FILTER** ppFilters = 0; FWPM_FILTER_ENUM_TEMPLATE filterEnumTemplate = {0}; GUID calloutKey = {0}; calloutKey = WFPSAMPLER_CALLOUT_FAST_PACKET_INJECTION; calloutKey.Data4[7] = HlprFwpmLayerGetIDByKey(&(pFilter->layerKey)); /// Uniquely identifies the callout used filterEnumTemplate.providerKey = (GUID*)&WFPSAMPLER_PROVIDER; filterEnumTemplate.layerKey = pFilter->layerKey; filterEnumTemplate.enumType = FWP_FILTER_ENUM_FULLY_CONTAINED; filterEnumTemplate.flags = FWP_FILTER_ENUM_FLAG_INCLUDE_BOOTTIME | FWP_FILTER_ENUM_FLAG_INCLUDE_DISABLED; filterEnumTemplate.numFilterConditions = pFilter->numFilterConditions; filterEnumTemplate.filterCondition = pFilter->filterCondition; filterEnumTemplate.actionMask = FWP_ACTION_FLAG_CALLOUT; filterEnumTemplate.calloutKey = &calloutKey; status = HlprFwpmEngineOpen(&engineHandle); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmFilterCreateEnumHandle(engineHandle, &filterEnumTemplate, &enumHandle); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmFilterEnum(engineHandle, enumHandle, 0xFFFFFFFF, &ppFilters, &entryCount); HLPR_BAIL_ON_FAILURE(status); if (ppFilters) { for ( UINT32 filterIndex = 0; filterIndex < entryCount; filterIndex++) { HlprFwpmFilterDeleteByKey(engineHandle, &(ppFilters[filterIndex]->filterKey)); HlprFwpmCalloutDeleteByKey(engineHandle, &(ppFilters[filterIndex]->action.calloutKey)); } FwpmFreeMemory(( void **)&ppFilters); } HLPR_BAIL_LABEL: if (engineHandle) { if (enumHandle) HlprFwpmFilterDestroyEnumHandle(engineHandle, &enumHandle); HlprFwpmEngineClose(&engineHandle); } return status; } /** @private_function="PrvScenarioFastPacketInjectionAddFwpmObjects" Purpose: Function that enables the SCENARIO_FAST_PACKET_INJECTION scenarios. <br> <br> Notes: Scenario adds a filter using specified filtering conditions to the specified layer. This filter is associated with WFPSampler's default sublayer and provider. The appropriate callout is then added and associated with the filter. <br> <br> MSDN_Ref: <br> */ _Success_( return == NO_ERROR) UINT32 PrvScenarioFastPacketInjectionAddFwpmObjects(_In_ const FWPM_FILTER* pFilter) { ASSERT(pFilter); UINT32 status = NO_ERROR; HANDLE engineHandle = 0; FWPM_CALLOUT callout = {0}; FWPM_FILTER filter = {0}; RtlCopyMemory(&filter, pFilter, sizeof (FWPM_FILTER)); callout.calloutKey = WFPSAMPLER_CALLOUT_FAST_PACKET_INJECTION; callout.calloutKey.Data4[7] = HlprFwpmLayerGetIDByKey(&(filter.layerKey)); /// Uniquely identifies the callout used callout.displayData.name = L "WFPSampler's Fast Packet Injection Callout" ; callout.displayData.description = L "Causes callout invocation which blindly injects traffic back" ; callout.providerKey = (GUID*)&WFPSAMPLER_PROVIDER; callout.applicableLayer = filter.layerKey; status = HlprGUIDPopulate(&(filter.filterKey)); HLPR_BAIL_ON_FAILURE(status); filter.providerKey = (GUID*)&WFPSAMPLER_PROVIDER; filter.subLayerKey = WFPSAMPLER_SUBLAYER; filter.weight.type = FWP_UINT8; filter.weight.uint8 = 0xF; filter.action.type = FWP_ACTION_CALLOUT_TERMINATING; filter.action.calloutKey = callout.calloutKey; if (filter.flags & FWPM_FILTER_FLAG_BOOTTIME || filter.flags & FWPM_FILTER_FLAG_PERSISTENT) callout.flags = FWPM_CALLOUT_FLAG_PERSISTENT; status = HlprFwpmEngineOpen(&engineHandle); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmTransactionBegin(engineHandle); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmCalloutAdd(engineHandle, &callout); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmFilterAdd(engineHandle, &filter); HLPR_BAIL_ON_FAILURE(status); status = HlprFwpmTransactionCommit(engineHandle); HLPR_BAIL_ON_FAILURE(status); HLPR_BAIL_LABEL: if (engineHandle) { if (status != NO_ERROR) HlprFwpmTransactionAbort(engineHandle); HlprFwpmEngineClose(&engineHandle); } return status; } /** @scenario_function="ScenarioFastPacketInjectionRemove" Purpose: Function that removes corresponding objects for a previously added SCENARIO_FAST_PACKET_INJECTION. <br> <br> Notes: <br> <br> MSDN_Ref: <br> */ _Success_( return == NO_ERROR) UINT32 ScenarioFastPacketInjectionRemove(_In_ const FWPM_FILTER* pFilter) { ASSERT(pFilter); return PrvScenarioFastPacketInjectionDeleteFwpmObjects(pFilter); } /** @scenario_function="ScenarioFastPacketInjectionAdd" Purpose: Scenario which will blindly reinject the classified traffic. <br> <br> Notes: Adds a filter which references one of the WFPSAMPLER_CALLOUT_FAST_PACKET_INJECTION callouts for the provided layer. <br> <br> No data modification is made to the traffic, and checks are in place to prevent infinite reinjection of the traffic. <br> <br> Ideal usage is to implement in the presence of a 3rd party firewall to see how they coexist with another provider performing injection. <br> <br> MSDN_Ref: <br> */ _Success_( return == NO_ERROR) UINT32 ScenarioFastPacketInjectionAdd(_In_ const FWPM_FILTER* pFilter) { ASSERT(pFilter); return PrvScenarioFastPacketInjectionAddFwpmObjects(pFilter); } /** @rpc_function="RPCInvokeScenarioFastPacketInjection" Purpose: RPC exposed function used to dipatch the scenario routines for SCENARIO_FAST_PACKET_INJECTION. <br> <br> Notes: <br> <br> MSDN_Ref: <br> */ error_status_t RPCInvokeScenarioFastPacketInjection( /* [in] */ handle_t rpcBindingHandle, /* [in] */ WFPSAMPLER_SCENARIO scenario, /* [in] */ FWPM_CHANGE_TYPE changeType, /* [ref][in] */ __RPC__in const FWPM_FILTER0* pFilter) { UNREFERENCED_PARAMETER(rpcBindingHandle); UNREFERENCED_PARAMETER(scenario); ASSERT(pFilter); ASSERT(scenario == SCENARIO_FAST_PACKET_INJECTION); ASSERT(changeType < FWPM_CHANGE_TYPE_MAX); UINT32 status = NO_ERROR; if (changeType == FWPM_CHANGE_ADD) status = ScenarioFastPacketInjectionAdd(pFilter); else status = ScenarioFastPacketInjectionRemove(pFilter); return status; } |
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