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22 #if !defined(AIRPCAP_H__EAE405F5_0171_9592_B3C2_C19EC426AD34__INCLUDED_)
23 #define AIRPCAP_H__EAE405F5_0171_9592_B3C2_C19EC426AD34__INCLUDED_
25 /* This disables a VS warning for zero-sized arrays. All the compilers we support have that feature */
26 #pragma warning( disable : 4200)
33 \mainpage AirPcap interface documentation
37 This document describes the data structures and the functions exported by the CACE Technologies AirPcap library.
38 The AirPcap library provides low-level access to the AirPcap driver including advanced capabilities such as channel setting,
39 link type control and WEP configuration.<br>
40 This manual includes the following sections:
42 \note throughout this documentation, \i device refers to a physical USB AirPcap device, wile \i adapter is an open API
43 instance. Most of the AirPcap API operations are adapter-specific but some of them, like setting the channel, are
44 per-device and will be reflected on all the open adapters. These functions will have "Device" in their name, e.g.
45 AirpcapSetDeviceChannel().
54 /** @defgroup airpcapdefs AirPcap definitions and data structures
59 \brief This string is the fixed prefix in the airpcap adapter name.
60 It can be used to parse the name field in an AirpcapDeviceDescription structure.
62 #define AIRPCAP_DEVICE_NAME_PREFIX "\\\\.\\airpcap"
65 \brief This string is the scanf modifier to extract the adapter number from an adapter name.
66 It can be used to parse the name field in an AirpcapDeviceDescription structure with scanf.
68 #define AIRPCAP_DEVICE_NUMBER_EXTRACT_STRING "\\\\.\\airpcap%u"
71 \brief This string is the scanf modifier to extract the adapter "Any" string from an adapter name.
72 It can be used to parse the name field in an AirpcapDeviceDescription structure with scanf.
74 #define AIRPCAP_DEVICE_ANY_EXTRACT_STRING "\\\\.\\airpcap_any"
77 \brief Entry in the list returned by \ref AirpcapGetDeviceList();
79 typedef struct _AirpcapDeviceDescription
81 struct _AirpcapDeviceDescription *next; /* Next element in the list */
82 PCHAR Name; /* Device name */
83 PCHAR Description; /* Device description */
84 } AirpcapDeviceDescription, *PAirpcapDeviceDescription;
86 #define MAX_ENCRYPTION_KEYS 64
88 #define WEP_KEY_MAX_SIZE 32 /* Maximum size of a WEP key, in bytes. This is the size of an entry in the */
89 /* AirpcapWepKeysCollection structure */
94 #endif /* __MINGW32__ */
97 #define AIRPCAP_KEYTYPE_WEP 0 /* Key type: WEP. The key can have an arbitrary length smaller than 32 bytes. */
98 #define AIRPCAP_KEYTYPE_TKIP 1 /* Key type: TKIP (WPA). NOT SUPPORTED YET. */
99 #define AIRPCAP_KEYTYPE_CCMP 2 /* Key type: CCMP (WPA2). NOT SUPPORTED YET. */
102 \brief WEP key container
104 typedef struct _AirpcapKey
106 UINT KeyType; /* Type of key, can be on of: \ref AIRPCAP_KEYTYPE_WEP, \ref AIRPCAP_KEYTYPE_TKIP, \ref AIRPCAP_KEYTYPE_CCMP. Only AIRPCAP_KEYTYPE_WEP is supported by the driver at the moment. */
107 UINT KeyLen; /* Length of the key, in bytes */
108 BYTE KeyData[WEP_KEY_MAX_SIZE]; /* Key Data */
111 __attribute__((__packed__))
112 #endif /* __MINGW32__ */
113 AirpcapKey, *PAirpcapKey;
116 \brief Type of frame validation the adapter performs.
117 An adapter can be instructed to accept different kind of frames: correct frames only, frames with wrong Frame Check Sequence (FCS) only, all frames.
119 typedef enum _AirpcapValidationType
121 AIRPCAP_VT_ACCEPT_EVERYTHING = 1, /* Accept all the frames the device captures */
122 AIRPCAP_VT_ACCEPT_CORRECT_FRAMES = 2, /* Accept correct frames only, i.e. frames with correct Frame Check Sequence (FCS). */
123 AIRPCAP_VT_ACCEPT_CORRUPT_FRAMES = 3, /* Accept corrupt frames only, i.e. frames with worng Frame Check Sequence (FCS). */
124 AIRPCAP_VT_UNKNOWN = 4 /* Unknown validation type. You should see it only in case of error. */
125 }AirpcapValidationType, *PAirpcapValidationType;
128 \brief Type of decryption the adapter performs.
129 An adapter can be instructed to turn decryption (based on the device-configured keys configured
130 with \ref AirpcapSetDeviceKeys()) on or off.
132 typedef enum _AirpcapDecryptionState
134 AIRPCAP_DECRYPTION_ON = 1, /* This adapter performs decryption */
135 AIRPCAP_DECRYPTION_OFF = 2 /* This adapter does not perform decryption */
136 }AirpcapDecryptionState, *PAirpcapDecryptionState;
140 \brief Storage for a MAC address
142 typedef struct _AirpcapMacAddress
144 BYTE Address[6]; /* MAC address bytes */
147 __attribute__((__packed__))
148 #endif /* __MINGW32__ */
149 AirpcapMacAddress, *PAirpcapMacAddress;
152 \brief This structure is used to store a collection of WEP keys.
153 Note that the definition of the structure doesn't contain any key, so be careful to allocate a buffer
154 with the size of the key, like in the following example:
157 PAirpcapKeysCollection KeysCollection;
158 UINT KeysCollectionSize;
160 KeysCollectionSize = sizeof(AirpcapKeysCollection) + NumKeys * sizeof(AirpcapKey);
162 KeysCollection = (PAirpcapKeysCollection)malloc(KeysCollectionSize);
169 typedef struct _AirpcapKeysCollection
171 UINT nKeys; /* Number of keys in the collection */
172 AirpcapKey Keys[0]; /* Array of nKeys keys. */
173 } AirpcapKeysCollection, *PAirpcapKeysCollection;
176 \brief Packet header.
178 This structure defines the BPF that preceeds every packet delivered to the application.
180 typedef struct _AirpcapBpfHeader
182 UINT TsSec; /* Timestamp associated with the captured packet. SECONDS. */
183 UINT TsUsec; /* Timestamp associated with the captured packet. MICROSECONDS. */
184 UINT Caplen; /* Length of captured portion. The captured portion <b>can be different</b> from the original packet, because it is possible (with a proper filter) to instruct the driver to capture only a portion of the packets. */
185 UINT Originallen; /* Original length of packet */
186 USHORT Hdrlen; /* Length of bpf header (this struct plus alignment padding). In some cases, a padding could be added between the end of this structure and the packet data for performance reasons. This field can be used to retrieve the actual data of the packet. */
189 __attribute__((__packed__))
190 #endif /* __MINGW32__ */
191 AirpcapBpfHeader, *PAirpcapBpfHeader;
193 /* Helper macros to extract packets coming from the driver. Rounds up to the next even multiple of AIRPCAP_ALIGNMENT. */
194 #define AIRPCAP_ALIGNMENT sizeof(int)
195 #define AIRPCAP_WORDALIGN(x) (((x)+(AIRPCAP_ALIGNMENT-1))&~(AIRPCAP_ALIGNMENT-1))
199 #endif /* __MINGW32__ */
201 #define AIRPCAP_ERRBUF_SIZE 512 /* Size of the error buffer, in bytes */
203 #ifndef __AIRPCAP_DRIVER__
207 AirPcap supports two kind of 802.11 linktypes: plain 802.11 and radiotap.
209 typedef enum _AirpcapLinkType
211 AIRPCAP_LT_802_11 = 1, /* plain 802.11 linktype. Every packet in the buffer contains the raw 802.11 frame, including MAC FCS. */
212 AIRPCAP_LT_802_11_PLUS_RADIO = 2, /* 802.11 plus radiotap linktype. Every packet in the buffer contains a radiotap header followed by the 802.11 frame. MAC FCS is included. */
213 AIRPCAP_LT_UNKNOWN = 3 /* Unknown linktype. You should see it only in case of error. */
214 }AirpcapLinkType, *PAirpcapLinkType;
216 #if !defined(AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_)
217 #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_
219 \brief Adapter handle.
221 typedef struct _AirpcapHandle AirpcapHandle, *PAirpcapHandle;
225 \brief Capture statistics.
226 Returned by \ref AirpcapGetStats();
228 typedef struct _AirpcapStats
230 UINT Recvs; /* Number of packets that the driver received by the adapter */
231 /* from the beginning of the current capture. This value includes the packets */
232 /* dropped because of buffer full. */
233 UINT Drops; /* number of packets that the driver dropped from the beginning of a capture. */
234 /* A packet is lost when the the buffer of the driver is full. */
235 UINT IfDrops; /* Packets dropped by the card before going to the USB bus. */
236 /* Not supported at the moment. */
237 UINT Capt; /* number of packets that pass the BPF filter, find place in the kernel buffer and */
238 /* therefore reach the application. */
239 }AirpcapStats, *PAirpcapStats;
243 /** @defgroup airpcapfuncs AirPcap functions
248 \brief Return a string with the API version
249 \param VersionMajor Pointer to a variable that will be filled with the major version number.
250 \param VersionMinor Pointer to a variable that will be filled with the minor version number.
251 \param VersionRev Pointer to a variable that will be filled with the revision number.
252 \param VersionBuild Pointer to a variable that will be filled with the build number.
254 void AirpcapGetVersion(PUINT VersionMajor, PUINT VersionMinor, PUINT VersionRev, PUINT VersionBuild);
257 \brief Return the last error related to the specified handle
258 \param AdapterHandle Handle to an open adapter.
259 \return The string with the last error.
261 PCHAR AirpcapGetLastError(PAirpcapHandle AdapterHandle);
264 \brief Return the list of available devices
265 \param PPAllDevs Address to a caller allocated pointer. On success this pointer will receive the head of a list of available devices.
266 \param Ebuf String that will contain error information if FALSE is returned. The size of the string must be AIRPCAP_ERRBUF_SIZE bytes.
267 \return TRUE on success. FALSE is returned on failure, in which case Ebuf is filled in with an appropriate error message.
269 Here's a snppet of code that shows how to use AirpcapGetDeviceList():
272 CHAR Ebuf[AIRPCAP_ERRBUF_SIZE];
273 AirpcapDeviceDescription *Desc, *tDesc;
275 if(AirpcapGetDeviceList(&Desc, Ebuf) == -1)
277 printf("Unable to get the list of devices: %s\n", Ebuf);
281 for(tDesc = Desc; tDesc; tDesc = tDesc->next)
283 printf("%u) %s (%s)\n",
290 BOOL AirpcapGetDeviceList(PAirpcapDeviceDescription *PPAllDevs, PCHAR Ebuf);
293 \brief Free a list of devices returned by AirpcapGetDeviceList()
294 \param PAllDevs Head of the list of devices returned by \ref AirpcapGetDeviceList().
296 VOID AirpcapFreeDeviceList(PAirpcapDeviceDescription PAllDevs);
299 \brief Open an adapter
300 \param DeviceName Name of the device to open. Use \ref AirpcapGetDeviceList() to get the list of devices.
301 \param Ebuf String that will contain error information in case of failure. The size of the string must be AIRPCAP_ERRBUF_SIZE bytes.
302 \return A PAirpcapHandle handle on success. NULL is returned on failure, in which case Ebuf is filled in with an appropriate error message.
304 PAirpcapHandle AirpcapOpen(PCHAR DeviceName, PCHAR Ebuf);
307 \brief Close an adapter
308 \param AdapterHandle Handle to the adapter to close.
310 VOID AirpcapClose(PAirpcapHandle AdapterHandle);
313 \brief Set the link type of an adapter
314 \param AdapterHandle Handle to the adapter.
315 \param NewLinkType the "link type", i.e. the format of the frames that will be received from the adapter.
316 \return TRUE on success.
318 the "link type" determines how the driver will encode the packets captured from the network.
319 Aircap supports two link types:
320 - AIRPCAP_LT_802_11, to capture 802.11 frames (including control frames) without any
321 power information. Look at the Capture_no_radio example application in the developer's pack
322 for a reference on how to decode 802.11 frames with this link type.
323 - AIRPCAP_LT_802_11_PLUS_RADIO, to capture 802.11 frames (including control frames) with a radiotap header
324 that contains power and channel information. More information about the radiotap header can be found int the
325 \ref radiotap section. Moreover, the "Capture_radio" example application in
326 the developer's pack can be used as a reference on how to decode 802.11 frames with radiotap headers.
328 BOOL AirpcapSetLinkType(PAirpcapHandle AdapterHandle, AirpcapLinkType NewLinkType);
331 \brief Get the link type of the specified adapter
332 \param AdapterHandle Handle to the adapter.
333 \param PLinkType Pointer to a caller allocated AirpcapLinkType variable that will contain the link type of the adapter.
334 \return TRUE on success.
336 the "link type" determines how the driver will encode the packets captured from the network.
337 Aircap supports two link types:
338 - AIRPCAP_LT_802_11, to capture 802.11 frames (including control frames) without any
339 power information. Look at the Capture_no_radio example application in the developer's pack
340 for a reference on how to decode 802.11 frames with this link type.
341 - AIRPCAP_LT_802_11_PLUS_RADIO, to capture 802.11 frames (including control frames) with a radiotap header
342 that contains power and channel information. More information about the radiotap header can be found int the
343 \ref radiotap section. Moreover, the "Capture_radio" example application in
344 the developer's pack can be used as a reference on how to decode 802.11 frames with radiotap headers.
346 BOOL AirpcapGetLinkType(PAirpcapHandle AdapterHandle, PAirpcapLinkType PLinkType);
349 \brief Configures the adapter on whether to include the MAC Frame Check Sequence in the captured packets.
350 \param AdapterHandle Handle to the adapter.
351 \param IsFcsPresent TRUE if the packets should include the FCS. FALSE otherwise
352 \return TRUE on success.
354 In the default configuration, the adapter includes the FCS in the captured packets. The MAC Frame Check Sequence
355 is 4 bytes and is located at the end of the 802.11 packet, with both AIRPCAP_LT_802_11 and AIRPCAP_LT_802_11_PLUS_RADIO
357 When the FCS inclusion is turned on, and if the link type is AIRPCAP_LT_802_11_PLUS_RADIO, the radiotap header
358 that precedes each frame has two additional fields at the end: Padding and FCS. These two fields are not present
359 when FCS inclusion is off.
361 BOOL AirpcapSetFcsPresence(PAirpcapHandle AdapterHandle, BOOL IsFcsPresent);
364 \brief Returns TRUE if the specified adapter includes the MAC Frame Check Sequence in the captured packets
365 \param AdapterHandle Handle to the adapter.
366 \param PIsFcsPresent User-provided variable that will be set to true if the adapter is including the FCS.
367 \return TRUE if the operation is successful. FALSE otherwise.
369 In the default configuration, the adatper has FCS inclusion turned on. The MAC Frame Check Sequence is 4 bytes
370 and is located at the end of the 802.11 packet, with both AIRPCAP_LT_802_11 and AIRPCAP_LT_802_11_PLUS_RADIO
372 When the FCS inclusion is turned on, and if the link type is AIRPCAP_LT_802_11_PLUS_RADIO, the radiotap header
373 that precedes each frame has two additional fields at the end: Padding and FCS. These two fields are not present
374 when FCS inclusion is off.
376 BOOL AirpcapGetFcsPresence(PAirpcapHandle AdapterHandle, PBOOL PIsFcsPresent);
379 \brief Configures the adapter to accept or drop frames with an incorrect Frame Check sequence (FCS).
380 \param AdapterHandle Handle to the adapter.
381 \param ValidationType The type of validation the driver will perform. See the documentation of \ref AirpcapValidationType for details.
382 \return TRUE on success.
384 \note By default, the driver is configured in \ref AIRPCAP_VT_ACCEPT_EVERYTHING mode.
386 BOOL AirpcapSetFcsValidation(PAirpcapHandle AdapterHandle, AirpcapValidationType ValidationType);
389 \brief Checks if the specified adapter is configured to capture frames with incorrect an incorrect Frame Check Sequence (FCS).
390 \param AdapterHandle Handle to the adapter.
391 \param ValidationType Pointer to a user supplied variable that will contain the type of validation the driver will perform. See the documentation of \ref AirpcapValidationType for details.
392 \return TRUE if the operation is succesful. FALSE otherwise.
394 \note By default, the driver is configured in \ref AIRPCAP_VT_ACCEPT_EVERYTHING mode.
396 BOOL AirpcapGetFcsValidation(PAirpcapHandle AdapterHandle, PAirpcapValidationType ValidationType);
399 \brief Set the list of decryption keys that the driver is going to use with the specified device.
400 \param AdapterHandle Handle an open adapter instance.
401 \param KeysCollection Pointer to a \ref PAirpcapKeysCollection structure that contains the keys to be set in the driver.
402 \return TRUE if the operation is successful. FALSE otherwise.
404 The AirPcap driver is able to use a set of decryption keys to decrypt the traffic transmitted on a specific SSID. If one of the
405 keys corresponds to the one the frame has been encrypted with, the driver will perform decryption and return the cleartext frames
407 The driver supports, for every device, multiple keys at the same time.
409 At this time, the only supported decryption method is WEP.
411 The configured decryption keys are device-specific: they will not be used by other airpcap devices besides the specified one.
413 The keys are applied to the packets in the same order they appear in the KeysCollection structure until the packet is
414 correctly decrypted, therefore putting frequently used keys at the beginning of the structure improves performance.
416 \note: this is a Device-related function: when you change the channel from an open capture instance, the change will be
417 immediately reflected on all the other capture instances.
419 BOOL AirpcapSetDeviceKeys(PAirpcapHandle AdapterHandle, PAirpcapKeysCollection KeysCollection);
422 \brief Returns the list of decryption keys in the driver that are currently associated with the specified device
423 \param AdapterHandle Handle to an open adapter instance.
424 \param KeysCollection User-allocated PAirpcapKeysCollection structure that will be filled with the keys.
425 \param PKeysCollectionSize \b IN: pointer to a user-allocated variable that contains the length of the KeysCollection structure, in bytes.
426 \b OUT: amount of data moved by the driver in the buffer pointed by KeysBuffer, in bytes.
427 \return TRUE if the operation is succesful. If an error occurs, the return value is FALSE and KeysCollectionSize is zero.
428 If the provided buffer is too small to contain the keys, the return value is FALSE and KeysCollectionSize contains the
429 needed KeysCollection length, in bytes. If the device doesn't have any decryption key configured, the return value is TRUE, and
430 KeysCollectionSize will be zero.
432 This function returns the list of decryption keys in the driver that are associated with the specified device.
433 The AirPcap driver is able to use a set of decryption keys to decrypt the traffic transmitted on a specific SSID. If one of the
434 keys corresponds to the one the frame has been encrypted with, the driver will perform decryption and return the cleartext frames
436 The driver supports, for every device, multiple keys at the same time.
438 The configured decryption keys are device-specific, therefore AirpcapGetDeviceKeys() will return a different set of keys
439 when called on different devices.
441 At this time, the only supported decryption method is WEP.
443 \note: this is a Device-related function: when you change the channel from an open capture instance, the change will be
444 immediately reflected on all the other capture instances.
446 BOOL AirpcapGetDeviceKeys(PAirpcapHandle AdapterHandle, PAirpcapKeysCollection KeysCollection, PUINT PKeysCollectionSize);
449 \brief Turns on or off the decryption of the incoming frames
450 \param AdapterHandle Handle to the adapter.
451 \param ValidationType Either \ref AIRPCAP_DECRYPTION_ON or \ref AIRPCAP_DECRYPTION_OFF
452 \return TRUE on success.
454 The decryption keys can be configured with the \ref AirpcapSetDeviceKeys() function.
455 \note By default, the driver is configured with \ref AIRPCAP_DECRYPTION_ON.
457 BOOL AirpcapSetDecryptionState(PAirpcapHandle AdapterHandle, AirpcapDecryptionState Enable);
460 \brief Tells if this open instance is configured to perform the decryption of the incoming frames
461 \param AdapterHandle Handle to the adapter.
462 \param ValidationType Pointer to a user supplied variable that will contain the decryption configuration. See \ref PAirpcapDecryptionState for details.
463 \return TRUE if the operation is succesful. FALSE otherwise.
465 The decryption keys can be configured with the \ref AirpcapSetDeviceKeys() function.
466 \note By default, the driver is configured with \ref AIRPCAP_DECRYPTION_ON.
468 BOOL AirpcapGetDecryptionState(PAirpcapHandle AdapterHandle, PAirpcapDecryptionState PEnable);
471 \brief Set the radio channel of a device
472 \param AdapterHandle Handle to the adapter.
473 \param Channel the new channel to set.
474 \return TRUE on success.
476 Valid channels are in the range 1-14. The default channel setting is 6.
478 \note: this is a Device-related function: when you change the channel from an open capture instance, the change will be
479 immediately reflected on all the other capture instances.
481 BOOL AirpcapSetDeviceChannel(PAirpcapHandle AdapterHandle, UINT Channel);
484 \brief Get the radio channel of a device
485 \param AdapterHandle Handle to the adapter.
486 \param PChannel Pointer to a user-supplied variable into which the function will copy the currently configured radio channel.
487 \return TRUE on success.
489 Valid channels are in the range 1-14. The default channel setting is 6.
491 \note: this is a Device-related function: when you change the channel from an open capture instance, the change will be
492 immediately reflected on all the other capture instances.
494 BOOL AirpcapGetDeviceChannel(PAirpcapHandle AdapterHandle, PUINT PChannel);
497 \brief Set the size of the kernel packet buffer for this adapter
498 \param AdapterHandle Handle to the adapter.
499 \param BufferSize New size, in bytes.
500 \return TRUE on success.
502 Every AirPcap open instance has an associated kernel buffer, whose default size is 1 Mbyte.
503 This function can be used to change the size of this buffer, and can be called at any time.
504 A bigger kernel buffer size decreases the risk of dropping packets during network bursts or when the
505 application is busy, at the cost of higher kernel memory usage.
507 \note: don't use this function unless you know what you are doing. Due to chaching issues and bigger non-paged
508 memory consumption, Bigger buffer sizes can decrease the capture performace instead of improving it.
510 BOOL AirpcapSetKernelBuffer(PAirpcapHandle AdapterHandle, UINT BufferSize);
513 \brief Get the size of the kernel packet buffer for this adapter
514 \param AdapterHandle Handle to the adapter.
515 \param PSizeBytes User-allocated variable that will be filled with the size of the kernel buffer.
516 \return TRUE on success.
518 Every AirPcap open instance has an associated kernel buffer, whose default size is 1 Mbyte.
519 This function can be used to get the size of this buffer.
521 BOOL AirpcapGetKernelBufferSize(PAirpcapHandle AdapterHandle, PUINT PSizeBytes);
524 \brief Saves the configuration of the specified adapter in the registry, so that it becomes the default for this adapter.
525 \param AdapterHandle Handle to the adapter.
526 \return TRUE on success. FALSE on failure.
528 Almost all the AirPcap calls that modify the configuration (\ref AirpcapSetLinkType(), \ref AirpcapSetFcsPresence(),
529 \ref AirpcapSetFcsValidation(), \ref AirpcapSetKernelBuffer(), \ref AirpcapSetMinToCopy())
530 affect only the referenced AirPcap open instance. This means that if you do another \ref AirpcapOpen() on the same
531 adapter, the configuration changes will not be remembered, and the new adapter handle will have default configuration
534 Exceptions to this rule are the \ref AirpcapSetDeviceChannel() and \ref AirpcapSetDeviceKeys() functions: a channel change is
535 reflected on all the open instances, and remembered until the next call to \ref AirpcapSetDeviceChannel(), until the adapter
536 is unplugged, or until the machine is powered off. Same thing for the configuration of the WEP keys.
538 AirpcapStoreCurConfigAsAdapterDefault() stores the configuration of the give open instance as the default for the adapter:
539 all the instances opened in the future will have the same configuration that this adapter currently has.
540 The configuration is stored in the registry, therefore it is remembered even when the adapter is unplugged or the
541 machine is turned off. However, an adapter doesn't bring its configuration with it from machine to machine.
543 the configuration information saved in the registry includes the following parameters:
550 - Encryption Enabled/Disabled state
552 The configuration is adapter-specific. This means that changing the configuration of an adapter
553 doesn't modify the one of the other adapters that are currently used or that will be used in the future.
555 \note AirpcapStoreCurConfigAsAdapterDefault() must have exclusive access to the adapter -- it
556 will fail if more than one AirPcap handle is opened at the same time for this adapter.
557 AirpcapStoreCurConfigAsAdapterDefault() needs administrator privileges. It will fail if the calling user
558 is not a local machine administrator.
560 BOOL AirpcapStoreCurConfigAsAdapterDefault(PAirpcapHandle AdapterHandle);
563 \brief Set the BPF kernel filter for an adapter
564 \param AdapterHandle Handle to the adapter.
565 \param Instructions pointer to the first BPF instruction in the array. Corresponds to the bf_insns
566 in a bpf_program structure (see the WinPcap documentation at http://www.winpcap.org/devel.htm).
567 \param Len Number of instructions in the array pointed by the previous field. Corresponds to the bf_len in
568 a a bpf_program structure (see the WinPcap documentation at http://www.winpcap.org/devel.htm).
569 \return TRUE on success.
571 The AirPcap driver is able to perform kernel-level filtering using the standard BPF pseudo-machine format. You can read
572 the WinPcap documentation at http://www.winpcap.org/devel.htm for more details on the BPF filtering mechaism.
574 A filter can be automatically created by using the pcap_compile() function of the WinPcap API. This function
575 converts a human readable text expression with the tcpdump/libpcap syntax into a BPF program.
576 If your program doesn't link wpcap, but you need to generate the code for a particular filter, you can run WinDump
577 with the -d or -dd or -ddd flags to obtain the pseudocode.
580 BOOL AirpcapSetFilter(PAirpcapHandle AdapterHandle, PVOID Instructions, UINT Len);
583 \brief Return the MAC address of an adapter.
584 \param AdapterHandle Handle to the adapter.
585 \param PMacAddress Pointer to a user allocated MAC address.
586 The size of this buffer needs to be at least 6 bytes.
587 \return TRUE on success.
589 BOOL AirpcapGetMacAddress(PAirpcapHandle AdapterHandle, PAirpcapMacAddress PMacAddress);
592 \brief Set the mintocopy parameter for an open adapter
593 \param AdapterHandle Handle to the adapter.
594 \param MinToCopy is the mintocopy size in bytes.
595 \return TRUE on success.
597 When the number of bytes in the kernel buffer changes from less than mintocopy bytes to greater than or equal to mintocopy bytes,
598 the read event is signalled (see \ref AirpcapGetReadEvent()). A high value for mintocopy results in poor responsiveness since the
599 driver may signal the application "long" after the arrival of the packet. And a high value results in low CPU loading
600 by minimizing the number of user/kernel context switches.
601 A low MinToCopy results in good responsiveness since the driver will signal the application close to the arrival time of
602 the packet. This has higher CPU loading over the first approach.
604 BOOL AirpcapSetMinToCopy(PAirpcapHandle AdapterHandle, UINT MinToCopy);
607 \brief Gets an event that is signaled when that is signalled when packets are available in the kernel buffer (see \ref AirpcapSetMinToCopy()).
608 \param AdapterHandle Handle to the adapter.
609 \param PReadEvent Pointer to a user-supplied handle that in which the read event will be copied.
610 \return TRUE on success.
612 \note the event is signalled when at least mintocopy bytes are present in the kernel buffer (see \ref AirpcapSetMinToCopy()).
613 This event can be used by WaitForSingleObject() and WaitForMultipleObjects() to create blocking behavior when reading
614 packets from one or more adapters (see \ref AirpcapRead()).
616 BOOL AirpcapGetReadEvent(PAirpcapHandle AdapterHandle, HANDLE* PReadEvent);
619 \brief Fills a user-provided buffer with zero or more packets that have been captured on the referenced adapter.
620 \param AdapterHandle Handle to the adapter.
621 \param Buffer pointer to the buffer that will be filled with captured packets.
622 \param BufSize size of the input buffer that will contain the packets, in bytes.
623 \param PReceievedBytes Pointer to a user supplied variable that will receive the number of bytes copied by AirpcapRead.
624 Can be smaller than BufSize.
625 \return TRUE on success.
627 802.11 frames are returned by the driver in buffers. Every 802.11 frame in the buffer is preceded by a \ref AirpcapBpfHeader structure.
628 The suggested way to use an AirPcap adapter is through the pcap API exported by wpcap.dll. If this is not
629 possible, the Capture_radio and Capture_no_radio examples in the AirPcap developer's pack show how to properly decode the
630 packets in the read buffer returned by AirpcapRead().
632 \note this function is NOT blocking. Blocking behavior can be obtained using the event returned
633 by \ref AirpcapGetReadEvent(). See also \ref AirpcapSetMinToCopy().
635 BOOL AirpcapRead(PAirpcapHandle AdapterHandle, PBYTE Buffer, UINT BufSize, PUINT PReceievedBytes);
638 \brief Get per-adapter WinPcap-compatible capture statistics.
639 \param AdapterHandle Handle to the adapter.
640 \param PStats pointer to a user-allocated AirpcapStats structure that will be filled with statistical information.
641 \return TRUE on success.
643 BOOL AirpcapGetStats(PAirpcapHandle AdapterHandle, PAirpcapStats PStats);
646 \brief Get the number of LEDs the referenced adapter has available.
647 \param AdapterHandle Handle to the adapter.
648 \param NumberOfLeds Number of LEDs available on this adapter.
649 \return TRUE on success.
651 BOOL AirpcapGetLedsNumber(PAirpcapHandle AdapterHandle, PUINT NumberOfLeds);
654 \brief Turn on one of the adapter's LEDs.
655 \param AdapterHandle Handle to the adapter.
656 \param LedNumber zero-based identifier of the LED to turn on.
657 \return TRUE on success.
659 BOOL AirpcapTurnLedOn(PAirpcapHandle AdapterHandle, UINT LedNumber);
662 \brief Turn off one of the adapter's LEDs.
663 \param AdapterHandle Handle to the adapter.
664 \param LedNumber zero-based identifier of the LED to turn off.
665 \return TRUE on success.
667 BOOL AirpcapTurnLedOff(PAirpcapHandle AdapterHandle, UINT LedNumber);
671 #endif /* __AIRPCAP_DRIVER__ */
677 #endif /* !defined(AIRPCAP_H__EAE405F5_0171_9592_B3C2_C19EC426AD34__INCLUDED_) */