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pcap-tc.c
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/*
* Copyright (c) 2008 CACE Technologies, Davis (California)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of CACE Technologies nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pcap.h>
#include <pcap-int.h>
#include "pcap-tc.h"
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <errno.h>
#ifdef _WIN32
#include <tchar.h>
#endif
typedef TC_STATUS (TC_CALLCONV *TcFcnQueryPortList) (PTC_PORT *ppPorts, PULONG pLength);
typedef TC_STATUS (TC_CALLCONV *TcFcnFreePortList) (TC_PORT *pPorts);
typedef PCHAR (TC_CALLCONV *TcFcnStatusGetString) (TC_STATUS status);
typedef PCHAR (TC_CALLCONV *TcFcnPortGetName) (TC_PORT port);
typedef PCHAR (TC_CALLCONV *TcFcnPortGetDescription) (TC_PORT port);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceOpenByName) (PCHAR name, PTC_INSTANCE pInstance);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceClose) (TC_INSTANCE instance);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceSetFeature) (TC_INSTANCE instance, ULONG feature, ULONG value);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceQueryFeature) (TC_INSTANCE instance, ULONG feature, PULONG pValue);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceReceivePackets) (TC_INSTANCE instance, PTC_PACKETS_BUFFER pBuffer);
typedef HANDLE (TC_CALLCONV *TcFcnInstanceGetReceiveWaitHandle) (TC_INSTANCE instance);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceTransmitPackets) (TC_INSTANCE instance, TC_PACKETS_BUFFER pBuffer);
typedef TC_STATUS (TC_CALLCONV *TcFcnInstanceQueryStatistics) (TC_INSTANCE instance, PTC_STATISTICS pStatistics);
typedef TC_STATUS (TC_CALLCONV *TcFcnPacketsBufferCreate) (ULONG size, PTC_PACKETS_BUFFER pBuffer);
typedef VOID (TC_CALLCONV *TcFcnPacketsBufferDestroy) (TC_PACKETS_BUFFER buffer);
typedef TC_STATUS (TC_CALLCONV *TcFcnPacketsBufferQueryNextPacket)(TC_PACKETS_BUFFER buffer, PTC_PACKET_HEADER pHeader, PVOID *ppData);
typedef TC_STATUS (TC_CALLCONV *TcFcnPacketsBufferCommitNextPacket)(TC_PACKETS_BUFFER buffer, PTC_PACKET_HEADER pHeader, PVOID pData);
typedef VOID (TC_CALLCONV *TcFcnStatisticsDestroy) (TC_STATISTICS statistics);
typedef TC_STATUS (TC_CALLCONV *TcFcnStatisticsUpdate) (TC_STATISTICS statistics);
typedef TC_STATUS (TC_CALLCONV *TcFcnStatisticsQueryValue) (TC_STATISTICS statistics, ULONG counterId, PULONGLONG pValue);
typedef enum LONG
{
TC_API_UNLOADED = 0,
TC_API_LOADED,
TC_API_CANNOT_LOAD,
TC_API_LOADING
}
TC_API_LOAD_STATUS;
typedef struct _TC_FUNCTIONS
{
TC_API_LOAD_STATUS LoadStatus;
#ifdef _WIN32
HMODULE hTcApiDllHandle;
#endif
TcFcnQueryPortList QueryPortList;
TcFcnFreePortList FreePortList;
TcFcnStatusGetString StatusGetString;
TcFcnPortGetName PortGetName;
TcFcnPortGetDescription PortGetDescription;
TcFcnInstanceOpenByName InstanceOpenByName;
TcFcnInstanceClose InstanceClose;
TcFcnInstanceSetFeature InstanceSetFeature;
TcFcnInstanceQueryFeature InstanceQueryFeature;
TcFcnInstanceReceivePackets InstanceReceivePackets;
#ifdef _WIN32
TcFcnInstanceGetReceiveWaitHandle InstanceGetReceiveWaitHandle;
#endif
TcFcnInstanceTransmitPackets InstanceTransmitPackets;
TcFcnInstanceQueryStatistics InstanceQueryStatistics;
TcFcnPacketsBufferCreate PacketsBufferCreate;
TcFcnPacketsBufferDestroy PacketsBufferDestroy;
TcFcnPacketsBufferQueryNextPacket PacketsBufferQueryNextPacket;
TcFcnPacketsBufferCommitNextPacket PacketsBufferCommitNextPacket;
TcFcnStatisticsDestroy StatisticsDestroy;
TcFcnStatisticsUpdate StatisticsUpdate;
TcFcnStatisticsQueryValue StatisticsQueryValue;
}
TC_FUNCTIONS;
static pcap_if_t* TcCreatePcapIfFromPort(TC_PORT port);
static int TcSetDatalink(pcap_t *p, int dlt);
static int TcGetNonBlock(pcap_t *p);
static int TcSetNonBlock(pcap_t *p, int nonblock);
static void TcCleanup(pcap_t *p);
static int TcInject(pcap_t *p, const void *buf, int size);
static int TcRead(pcap_t *p, int cnt, pcap_handler callback, u_char *user);
static int TcStats(pcap_t *p, struct pcap_stat *ps);
#ifdef _WIN32
static struct pcap_stat *TcStatsEx(pcap_t *p, int *pcap_stat_size);
static int TcSetBuff(pcap_t *p, int dim);
static int TcSetMode(pcap_t *p, int mode);
static int TcSetMinToCopy(pcap_t *p, int size);
static HANDLE TcGetReceiveWaitHandle(pcap_t *p);
static int TcOidGetRequest(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp);
static int TcOidSetRequest(pcap_t *p, bpf_u_int32 oid, const void *data, size_t *lenp);
static u_int TcSendqueueTransmit(pcap_t *p, pcap_send_queue *queue, int sync);
static int TcSetUserBuffer(pcap_t *p, int size);
static int TcLiveDump(pcap_t *p, char *filename, int maxsize, int maxpacks);
static int TcLiveDumpEnded(pcap_t *p, int sync);
static PAirpcapHandle TcGetAirPcapHandle(pcap_t *p);
#endif
#ifdef _WIN32
TC_FUNCTIONS g_TcFunctions =
{
TC_API_UNLOADED, /* LoadStatus */
NULL, /* hTcApiDllHandle */
NULL, /* QueryPortList */
NULL, /* FreePortList */
NULL, /* StatusGetString */
NULL, /* PortGetName */
NULL, /* PortGetDescription */
NULL, /* InstanceOpenByName */
NULL, /* InstanceClose */
NULL, /* InstanceSetFeature */
NULL, /* InstanceQueryFeature */
NULL, /* InstanceReceivePackets */
NULL, /* InstanceGetReceiveWaitHandle */
NULL, /* InstanceTransmitPackets */
NULL, /* InstanceQueryStatistics */
NULL, /* PacketsBufferCreate */
NULL, /* PacketsBufferDestroy */
NULL, /* PacketsBufferQueryNextPacket */
NULL, /* PacketsBufferCommitNextPacket */
NULL, /* StatisticsDestroy */
NULL, /* StatisticsUpdate */
NULL /* StatisticsQueryValue */
};
#else
TC_FUNCTIONS g_TcFunctions =
{
TC_API_LOADED, /* LoadStatus */
TcQueryPortList,
TcFreePortList,
TcStatusGetString,
TcPortGetName,
TcPortGetDescription,
TcInstanceOpenByName,
TcInstanceClose,
TcInstanceSetFeature,
TcInstanceQueryFeature,
TcInstanceReceivePackets,
#ifdef _WIN32
TcInstanceGetReceiveWaitHandle,
#endif
TcInstanceTransmitPackets,
TcInstanceQueryStatistics,
TcPacketsBufferCreate,
TcPacketsBufferDestroy,
TcPacketsBufferQueryNextPacket,
TcPacketsBufferCommitNextPacket,
TcStatisticsDestroy,
TcStatisticsUpdate,
TcStatisticsQueryValue,
};
#endif
#define MAX_TC_PACKET_SIZE 9500
#pragma pack(push, 1)
#define PPH_PH_FLAG_PADDING ((UCHAR)0x01)
#define PPH_PH_VERSION ((UCHAR)0x00)
typedef struct _PPI_PACKET_HEADER
{
UCHAR PphVersion;
UCHAR PphFlags;
USHORT PphLength;
ULONG PphDlt;
}
PPI_PACKET_HEADER, *PPPI_PACKET_HEADER;
typedef struct _PPI_FIELD_HEADER
{
USHORT PfhType;
USHORT PfhLength;
}
PPI_FIELD_HEADER, *PPPI_FIELD_HEADER;
#define PPI_FIELD_TYPE_AGGREGATION_EXTENSION ((UCHAR)0x08)
typedef struct _PPI_FIELD_AGGREGATION_EXTENSION
{
ULONG InterfaceId;
}
PPI_FIELD_AGGREGATION_EXTENSION, *PPPI_FIELD_AGGREGATION_EXTENSION;
#define PPI_FIELD_TYPE_802_3_EXTENSION ((UCHAR)0x09)
#define PPI_FLD_802_3_EXT_FLAG_FCS_PRESENT ((ULONG)0x00000001)
typedef struct _PPI_FIELD_802_3_EXTENSION
{
ULONG Flags;
ULONG Errors;
}
PPI_FIELD_802_3_EXTENSION, *PPPI_FIELD_802_3_EXTENSION;
typedef struct _PPI_HEADER
{
PPI_PACKET_HEADER PacketHeader;
PPI_FIELD_HEADER AggregationFieldHeader;
PPI_FIELD_AGGREGATION_EXTENSION AggregationField;
PPI_FIELD_HEADER Dot3FieldHeader;
PPI_FIELD_802_3_EXTENSION Dot3Field;
}
PPI_HEADER, *PPPI_HEADER;
#pragma pack(pop)
#ifdef _WIN32
/*
* NOTE: this function should be called by the pcap functions that can theoretically
* deal with the Tc library for the first time, namely listing the adapters and
* opening one. All the other ones (close, read, write, set parameters) work
* on an open instance of TC, so we do not care to call this function
*/
TC_API_LOAD_STATUS LoadTcFunctions(void)
{
TC_API_LOAD_STATUS currentStatus;
do
{
currentStatus = InterlockedCompareExchange((LONG*)&g_TcFunctions.LoadStatus, TC_API_LOADING, TC_API_UNLOADED);
while(currentStatus == TC_API_LOADING)
{
currentStatus = InterlockedCompareExchange((LONG*)&g_TcFunctions.LoadStatus, TC_API_LOADING, TC_API_LOADING);
Sleep(10);
}
/*
* at this point we are either in the LOADED state, unloaded state (i.e. we are the ones loading everything)
* or in cannot load
*/
if(currentStatus == TC_API_LOADED)
{
return TC_API_LOADED;
}
if (currentStatus == TC_API_CANNOT_LOAD)
{
return TC_API_CANNOT_LOAD;
}
currentStatus = TC_API_CANNOT_LOAD;
g_TcFunctions.hTcApiDllHandle = pcap_load_code("TcApi.dll");
if (g_TcFunctions.hTcApiDllHandle == NULL) break;
g_TcFunctions.QueryPortList = (TcFcnQueryPortList) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcQueryPortList");
g_TcFunctions.FreePortList = (TcFcnFreePortList) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcFreePortList");
g_TcFunctions.StatusGetString = (TcFcnStatusGetString) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcStatusGetString");
g_TcFunctions.PortGetName = (TcFcnPortGetName) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPortGetName");
g_TcFunctions.PortGetDescription = (TcFcnPortGetDescription) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPortGetDescription");
g_TcFunctions.InstanceOpenByName = (TcFcnInstanceOpenByName) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceOpenByName");
g_TcFunctions.InstanceClose = (TcFcnInstanceClose) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceClose");
g_TcFunctions.InstanceSetFeature = (TcFcnInstanceSetFeature) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceSetFeature");
g_TcFunctions.InstanceQueryFeature = (TcFcnInstanceQueryFeature) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceQueryFeature");
g_TcFunctions.InstanceReceivePackets = (TcFcnInstanceReceivePackets) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceReceivePackets");
g_TcFunctions.InstanceGetReceiveWaitHandle = (TcFcnInstanceGetReceiveWaitHandle)pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceGetReceiveWaitHandle");
g_TcFunctions.InstanceTransmitPackets = (TcFcnInstanceTransmitPackets)pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceTransmitPackets");
g_TcFunctions.InstanceQueryStatistics = (TcFcnInstanceQueryStatistics)pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcInstanceQueryStatistics");
g_TcFunctions.PacketsBufferCreate = (TcFcnPacketsBufferCreate) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPacketsBufferCreate");
g_TcFunctions.PacketsBufferDestroy = (TcFcnPacketsBufferDestroy) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPacketsBufferDestroy");
g_TcFunctions.PacketsBufferQueryNextPacket = (TcFcnPacketsBufferQueryNextPacket)pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPacketsBufferQueryNextPacket");
g_TcFunctions.PacketsBufferCommitNextPacket = (TcFcnPacketsBufferCommitNextPacket)pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcPacketsBufferCommitNextPacket");
g_TcFunctions.StatisticsDestroy = (TcFcnStatisticsDestroy) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcStatisticsDestroy");
g_TcFunctions.StatisticsUpdate = (TcFcnStatisticsUpdate) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcStatisticsUpdate");
g_TcFunctions.StatisticsQueryValue = (TcFcnStatisticsQueryValue) pcap_find_function(g_TcFunctions.hTcApiDllHandle, "TcStatisticsQueryValue");
if ( g_TcFunctions.QueryPortList == NULL
|| g_TcFunctions.FreePortList == NULL
|| g_TcFunctions.StatusGetString == NULL
|| g_TcFunctions.PortGetName == NULL
|| g_TcFunctions.PortGetDescription == NULL
|| g_TcFunctions.InstanceOpenByName == NULL
|| g_TcFunctions.InstanceClose == NULL
|| g_TcFunctions.InstanceSetFeature == NULL
|| g_TcFunctions.InstanceQueryFeature == NULL
|| g_TcFunctions.InstanceReceivePackets == NULL
|| g_TcFunctions.InstanceGetReceiveWaitHandle == NULL
|| g_TcFunctions.InstanceTransmitPackets == NULL
|| g_TcFunctions.InstanceQueryStatistics == NULL
|| g_TcFunctions.PacketsBufferCreate == NULL
|| g_TcFunctions.PacketsBufferDestroy == NULL
|| g_TcFunctions.PacketsBufferQueryNextPacket == NULL
|| g_TcFunctions.PacketsBufferCommitNextPacket == NULL
|| g_TcFunctions.StatisticsDestroy == NULL
|| g_TcFunctions.StatisticsUpdate == NULL
|| g_TcFunctions.StatisticsQueryValue == NULL
)
{
break;
}
/*
* everything got loaded, yay!!
*/
currentStatus = TC_API_LOADED;
}while(FALSE);
if (currentStatus != TC_API_LOADED)
{
if (g_TcFunctions.hTcApiDllHandle != NULL)
{
FreeLibrary(g_TcFunctions.hTcApiDllHandle);
g_TcFunctions.hTcApiDllHandle = NULL;
}
}
InterlockedExchange((LONG*)&g_TcFunctions.LoadStatus, currentStatus);
return currentStatus;
}
#else
// static linking
TC_API_LOAD_STATUS LoadTcFunctions(void)
{
return TC_API_LOADED;
}
#endif
/*
* Private data for capturing on TurboCap devices.
*/
struct pcap_tc {
TC_INSTANCE TcInstance;
TC_PACKETS_BUFFER TcPacketsBuffer;
ULONG TcAcceptedCount;
u_char *PpiPacket;
};
int
TcFindAllDevs(pcap_if_list_t *devlist, char *errbuf)
{
TC_API_LOAD_STATUS loadStatus;
ULONG numPorts;
PTC_PORT pPorts = NULL;
TC_STATUS status;
int result = 0;
pcap_if_t *dev;
ULONG i;
do
{
loadStatus = LoadTcFunctions();
if (loadStatus != TC_API_LOADED)
{
result = 0;
break;
}
/*
* enumerate the ports, and add them to the list
*/
status = g_TcFunctions.QueryPortList(&pPorts, &numPorts);
if (status != TC_SUCCESS)
{
result = 0;
break;
}
for (i = 0; i < numPorts; i++)
{
/*
* transform the port into an entry in the list
*/
dev = TcCreatePcapIfFromPort(pPorts[i]);
if (dev != NULL)
add_dev(devlist, dev->name, dev->flags, dev->description, errbuf);
}
if (numPorts > 0)
{
/*
* ignore the result here
*/
status = g_TcFunctions.FreePortList(pPorts);
}
}while(FALSE);
return result;
}
static pcap_if_t* TcCreatePcapIfFromPort(TC_PORT port)
{
CHAR *name;
CHAR *description;
pcap_if_t *newIf = NULL;
newIf = (pcap_if_t*)malloc(sizeof(*newIf));
if (newIf == NULL)
{
return NULL;
}
memset(newIf, 0, sizeof(*newIf));
name = g_TcFunctions.PortGetName(port);
description = g_TcFunctions.PortGetDescription(port);
newIf->name = (char*)malloc(strlen(name) + 1);
if (newIf->name == NULL)
{
free(newIf);
return NULL;
}
newIf->description = (char*)malloc(strlen(description) + 1);
if (newIf->description == NULL)
{
free(newIf->name);
free(newIf);
return NULL;
}
strcpy(newIf->name, name);
strcpy(newIf->description, description);
newIf->addresses = NULL;
newIf->next = NULL;
newIf->flags = 0;
return newIf;
}
static int
TcActivate(pcap_t *p)
{
struct pcap_tc *pt = p->priv;
TC_STATUS status;
ULONG timeout;
PPPI_HEADER pPpiHeader;
if (p->opt.rfmon)
{
/*
* No monitor mode on Tc cards; they're Ethernet
* capture adapters.
*/
return PCAP_ERROR_RFMON_NOTSUP;
}
pt->PpiPacket = malloc(sizeof(PPI_HEADER) + MAX_TC_PACKET_SIZE);
if (pt->PpiPacket == NULL)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Error allocating memory");
return PCAP_ERROR;
}
/*
* Turn a negative snapshot value (invalid), a snapshot value of
* 0 (unspecified), or a value bigger than the normal maximum
* value, into the maximum allowed value.
*
* If some application really *needs* a bigger snapshot
* length, we should just increase MAXIMUM_SNAPLEN.
*/
if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
p->snapshot = MAXIMUM_SNAPLEN;
/*
* Initialize the PPI fixed fields
*/
pPpiHeader = (PPPI_HEADER)pt->PpiPacket;
pPpiHeader->PacketHeader.PphDlt = DLT_EN10MB;
pPpiHeader->PacketHeader.PphLength = sizeof(PPI_HEADER);
pPpiHeader->PacketHeader.PphFlags = 0;
pPpiHeader->PacketHeader.PphVersion = 0;
pPpiHeader->AggregationFieldHeader.PfhLength = sizeof(PPI_FIELD_AGGREGATION_EXTENSION);
pPpiHeader->AggregationFieldHeader.PfhType = PPI_FIELD_TYPE_AGGREGATION_EXTENSION;
pPpiHeader->Dot3FieldHeader.PfhLength = sizeof(PPI_FIELD_802_3_EXTENSION);
pPpiHeader->Dot3FieldHeader.PfhType = PPI_FIELD_TYPE_802_3_EXTENSION;
status = g_TcFunctions.InstanceOpenByName(p->opt.device, &pt->TcInstance);
if (status != TC_SUCCESS)
{
/* Adapter detected but we are not able to open it. Return failure. */
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Error opening TurboCap adapter: %s", g_TcFunctions.StatusGetString(status));
return PCAP_ERROR;
}
p->linktype = DLT_EN10MB;
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
/*
* If that fails, just leave the list empty.
*/
if (p->dlt_list != NULL) {
p->dlt_list[0] = DLT_EN10MB;
p->dlt_list[1] = DLT_PPI;
p->dlt_count = 2;
}
/*
* ignore promiscuous mode
* p->opt.promisc
*/
/*
* ignore all the buffer sizes
*/
/*
* enable reception
*/
status = g_TcFunctions.InstanceSetFeature(pt->TcInstance, TC_INST_FT_RX_STATUS, 1);
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,"Error enabling reception on a TurboCap instance: %s", g_TcFunctions.StatusGetString(status));
goto bad;
}
/*
* enable transmission
*/
status = g_TcFunctions.InstanceSetFeature(pt->TcInstance, TC_INST_FT_TX_STATUS, 1);
/*
* Ignore the error here.
*/
p->inject_op = TcInject;
/*
* if the timeout is -1, it means immediate return, no timeout
* if the timeout is 0, it means INFINITE
*/
if (p->opt.timeout == 0)
{
timeout = 0xFFFFFFFF;
}
else
if (p->opt.timeout < 0)
{
/*
* we insert a minimal timeout here
*/
timeout = 10;
}
else
{
timeout = p->opt.timeout;
}
status = g_TcFunctions.InstanceSetFeature(pt->TcInstance, TC_INST_FT_READ_TIMEOUT, timeout);
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,"Error setting the read timeout a TurboCap instance: %s", g_TcFunctions.StatusGetString(status));
goto bad;
}
p->read_op = TcRead;
p->setfilter_op = install_bpf_program;
p->setdirection_op = NULL; /* Not implemented. */
p->set_datalink_op = TcSetDatalink;
p->getnonblock_op = TcGetNonBlock;
p->setnonblock_op = TcSetNonBlock;
p->stats_op = TcStats;
#ifdef _WIN32
p->stats_ex_op = TcStatsEx;
p->setbuff_op = TcSetBuff;
p->setmode_op = TcSetMode;
p->setmintocopy_op = TcSetMinToCopy;
p->getevent_op = TcGetReceiveWaitHandle;
p->oid_get_request_op = TcOidGetRequest;
p->oid_set_request_op = TcOidSetRequest;
p->sendqueue_transmit_op = TcSendqueueTransmit;
p->setuserbuffer_op = TcSetUserBuffer;
p->live_dump_op = TcLiveDump;
p->live_dump_ended_op = TcLiveDumpEnded;
p->get_airpcap_handle_op = TcGetAirPcapHandle;
#else
p->selectable_fd = -1;
#endif
p->cleanup_op = TcCleanup;
return 0;
bad:
TcCleanup(p);
return PCAP_ERROR;
}
pcap_t *
TcCreate(const char *device, char *ebuf, int *is_ours)
{
ULONG numPorts;
PTC_PORT pPorts = NULL;
TC_STATUS status;
int is_tc;
ULONG i;
pcap_t *p;
if (LoadTcFunctions() != TC_API_LOADED)
{
/*
* XXX - report this as an error rather than as
* "not a TurboCap device"?
*/
*is_ours = 0;
return NULL;
}
/*
* enumerate the ports, and add them to the list
*/
status = g_TcFunctions.QueryPortList(&pPorts, &numPorts);
if (status != TC_SUCCESS)
{
/*
* XXX - report this as an error rather than as
* "not a TurboCap device"?
*/
*is_ours = 0;
return NULL;
}
is_tc = FALSE;
for (i = 0; i < numPorts; i++)
{
if (strcmp(g_TcFunctions.PortGetName(pPorts[i]), device) == 0)
{
is_tc = TRUE;
break;
}
}
if (numPorts > 0)
{
/*
* ignore the result here
*/
(void)g_TcFunctions.FreePortList(pPorts);
}
if (!is_tc)
{
*is_ours = 0;
return NULL;
}
/* OK, it's probably ours. */
*is_ours = 1;
p = PCAP_CREATE_COMMON(ebuf, struct pcap_tc);
if (p == NULL)
return NULL;
p->activate_op = TcActivate;
/*
* Set these up front, so that, even if our client tries
* to set non-blocking mode before we're activated, or
* query the state of non-blocking mode, they get an error,
* rather than having the non-blocking mode option set
* for use later.
*/
p->getnonblock_op = TcGetNonBlock;
p->setnonblock_op = TcSetNonBlock;
return p;
}
static int TcSetDatalink(pcap_t *p, int dlt)
{
/*
* We don't have to do any work here; pcap_set_datalink() checks
* whether the value is in the list of DLT_ values we
* supplied, so we don't have to, and, if it is valid, sets
* p->linktype to the new value; we don't have to do anything
* in hardware, we just use what's in p->linktype.
*
* We do have to have a routine, however, so that pcap_set_datalink()
* doesn't think we don't support setting the link-layer header
* type at all.
*/
return 0;
}
static int TcGetNonBlock(pcap_t *p)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Non-blocking mode isn't supported for TurboCap ports");
return -1;
}
static int TcSetNonBlock(pcap_t *p, int nonblock)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Non-blocking mode isn't supported for TurboCap ports");
return -1;
}
static void TcCleanup(pcap_t *p)
{
struct pcap_tc *pt = p->priv;
if (pt->TcPacketsBuffer != NULL)
{
g_TcFunctions.PacketsBufferDestroy(pt->TcPacketsBuffer);
pt->TcPacketsBuffer = NULL;
}
if (pt->TcInstance != NULL)
{
/*
* here we do not check for the error values
*/
g_TcFunctions.InstanceClose(pt->TcInstance);
pt->TcInstance = NULL;
}
if (pt->PpiPacket != NULL)
{
free(pt->PpiPacket);
pt->PpiPacket = NULL;
}
pcap_cleanup_live_common(p);
}
/* Send a packet to the network */
static int TcInject(pcap_t *p, const void *buf, int size)
{
struct pcap_tc *pt = p->priv;
TC_STATUS status;
TC_PACKETS_BUFFER buffer;
TC_PACKET_HEADER header;
if (size >= 0xFFFF)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: the TurboCap API does not support packets larger than 64k");
return -1;
}
status = g_TcFunctions.PacketsBufferCreate(sizeof(TC_PACKET_HEADER) + TC_ALIGN_USHORT_TO_64BIT((USHORT)size), &buffer);
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcPacketsBufferCreate failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
/*
* we assume that the packet is without the checksum, as common with WinPcap
*/
memset(&header, 0, sizeof(header));
header.Length = (USHORT)size;
header.CapturedLength = header.Length;
status = g_TcFunctions.PacketsBufferCommitNextPacket(buffer, &header, (PVOID)buf);
if (status == TC_SUCCESS)
{
status = g_TcFunctions.InstanceTransmitPackets(pt->TcInstance, buffer);
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcInstanceTransmitPackets failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
}
}
else
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send error: TcPacketsBufferCommitNextPacket failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
}
g_TcFunctions.PacketsBufferDestroy(buffer);
if (status != TC_SUCCESS)
{
return -1;
}
else
{
return 0;
}
}
static int TcRead(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
{
struct pcap_tc *pt = p->priv;
TC_STATUS status;
int n = 0;
/*
* Has "pcap_breakloop()" been called?
*/
if (p->break_loop)
{
/*
* Yes - clear the flag that indicates that it
* has, and return -2 to indicate that we were
* told to break out of the loop.
*/
p->break_loop = 0;
return -2;
}
if (pt->TcPacketsBuffer == NULL)
{
status = g_TcFunctions.InstanceReceivePackets(pt->TcInstance, &pt->TcPacketsBuffer);
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error, TcInstanceReceivePackets failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
}
while (TRUE)
{
struct pcap_pkthdr hdr;
TC_PACKET_HEADER tcHeader;
PVOID data;
ULONG filterResult;
/*
* Has "pcap_breakloop()" been called?
* If so, return immediately - if we haven't read any
* packets, clear the flag and return -2 to indicate
* that we were told to break out of the loop, otherwise
* leave the flag set, so that the *next* call will break
* out of the loop without having read any packets, and
* return the number of packets we've processed so far.
*/
if (p->break_loop)
{
if (n == 0)
{
p->break_loop = 0;
return -2;
}
else
{
return n;
}
}
if (pt->TcPacketsBuffer == NULL)
{
break;
}
status = g_TcFunctions.PacketsBufferQueryNextPacket(pt->TcPacketsBuffer, &tcHeader, &data);
if (status == TC_ERROR_END_OF_BUFFER)
{
g_TcFunctions.PacketsBufferDestroy(pt->TcPacketsBuffer);
pt->TcPacketsBuffer = NULL;
break;
}
if (status != TC_SUCCESS)
{
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error, TcPacketsBufferQueryNextPacket failure: %s (%08x)", g_TcFunctions.StatusGetString(status), status);
return -1;
}
/* No underlying filtering system. We need to filter on our own */
if (p->fcode.bf_insns)
{
filterResult = pcap_filter(p->fcode.bf_insns, data, tcHeader.Length, tcHeader.CapturedLength);
if (filterResult == 0)
{
continue;
}
if (filterResult > tcHeader.CapturedLength)
{
filterResult = tcHeader.CapturedLength;
}
}
else
{
filterResult = tcHeader.CapturedLength;
}
pt->TcAcceptedCount ++;
hdr.ts.tv_sec = (bpf_u_int32)(tcHeader.Timestamp / (ULONGLONG)(1000 * 1000 * 1000));
hdr.ts.tv_usec = (bpf_u_int32)((tcHeader.Timestamp % (ULONGLONG)(1000 * 1000 * 1000)) / 1000);
if (p->linktype == DLT_EN10MB)
{
hdr.caplen = filterResult;
hdr.len = tcHeader.Length;
(*callback)(user, &hdr, data);
}
else
{
PPPI_HEADER pPpiHeader = (PPPI_HEADER)pt->PpiPacket;
PVOID data2 = pPpiHeader + 1;
pPpiHeader->AggregationField.InterfaceId = TC_PH_FLAGS_RX_PORT_ID(tcHeader.Flags);
pPpiHeader->Dot3Field.Errors = tcHeader.Errors;
if (tcHeader.Flags & TC_PH_FLAGS_CHECKSUM)
{
pPpiHeader->Dot3Field.Flags = PPI_FLD_802_3_EXT_FLAG_FCS_PRESENT;
}
else
{
pPpiHeader->Dot3Field.Flags = 0;
}
if (filterResult <= MAX_TC_PACKET_SIZE)
{
memcpy(data2, data, filterResult);
hdr.caplen = sizeof(PPI_HEADER) + filterResult;
hdr.len = sizeof(PPI_HEADER) + tcHeader.Length;
}
else
{
memcpy(data2, data, MAX_TC_PACKET_SIZE);
hdr.caplen = sizeof(PPI_HEADER) + MAX_TC_PACKET_SIZE;
hdr.len = sizeof(PPI_HEADER) + tcHeader.Length;
}
(*callback)(user, &hdr, pt->PpiPacket);
}
if (++n >= cnt && cnt > 0)
{
return n;
}
}
return n;
}
static int
TcStats(pcap_t *p, struct pcap_stat *ps)
{
struct pcap_tc *pt = p->priv;
TC_STATISTICS statistics;
TC_STATUS status;
ULONGLONG counter;
struct pcap_stat s;
status = g_TcFunctions.InstanceQueryStatistics(pt->TcInstance, &statistics);