C:/fscan/HTTPCore/IoFunctions.cpp File Reference

#include "IoFunctions.h"
#include "Threading.h"
#include "Modules/Encoding_Chunked.h"

Include dependency graph for IoFunctions.cpp:

Go to the source code of this file.

Data Structures
struct	timezone
Defines
#define	__uint64   unsigned __int64
#define	DELTA_EPOCH_IN_MICROSECS   11644473600000000ULL
Functions
static int	gettimeofday (struct timeval *tv, struct timezone *tz)
static int	LimitIOBandwidth (unsigned long ChunkSize, struct timeval LastTime, struct timeval CurrentTime, int MAX_BW_LIMIT)
	This function checks if the transfered data exceeds the current bandwidth limit.
int	SendHTTPRequestData (STABLISHED_CONNECTION *conexion, PHTTP_DATA request)
	This function sends an HTTP request to the remote webserver. a CONEXION struct with initialized sockets. If the connection was previously initialized that struct will be resused.
PHTTP_DATA	ReadHTTPResponseData (STABLISHED_CONNECTION *conexion, PHTTP_DATA request, void *lock)
	This function reads an HTTP response stream from the remote webserver.
int	StablishConnection (STABLISHED_CONNECTION *connection)
	This function stablishes a connection against a remote host.
int	InitFileMapping (void)
int	EndFileMapping (void)
char *	DeleteFileMapping (void *ptr)
PHTTPIOMapping	GetFileMapping (unsigned int DataSize, char *lpData)
Variables
HTTPIOMapping	HTTPIoMappingData [MAXIMUM_OPENED_HANDLES]
CRITICAL_SECTION	IoMappingLock

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Define Documentation

#define __uint64   unsigned __int64

Definition at line 7 of file IoFunctions.cpp.

Referenced by LimitIOBandwidth().

#define DELTA_EPOCH_IN_MICROSECS   11644473600000000ULL

Definition at line 15 of file IoFunctions.cpp.

Referenced by gettimeofday().

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Function Documentation

char* DeleteFileMapping

(

void *

ptr

)

Definition at line 818 of file IoFunctions.cpp.

int EndFileMapping

(

void

)

Definition at line 799 of file IoFunctions.cpp.

PHTTPIOMapping GetFileMapping	(	unsigned int	DataSize,
		char *	lpData
	)

Definition at line 862 of file IoFunctions.cpp.

Referenced by DecodeChunk(), and ReadHTTPResponseData().

static int gettimeofday	(	struct timeval *	tv,
		struct timezone *	tz
	)			[static]

Definition at line 24 of file IoFunctions.cpp.

References DELTA_EPOCH_IN_MICROSECS, timezone::tz_dsttime, and timezone::tz_minuteswest.

Referenced by ReadHTTPResponseData().

int InitFileMapping

(

void

)

Definition at line 792 of file IoFunctions.cpp.

static int LimitIOBandwidth	(	unsigned long	ChunkSize,
		struct timeval	LastTime,
		struct timeval	CurrentTime,
		int	MAX_BW_LIMIT
	)			[static]

This function checks if the transfered data exceeds the current bandwidth limit.

Parameters:

	ChunkSize	Size of the transfered data block.
	LastTime	timeval struct that stores the moment when the application began to receive data.
	CurrentTime	timeval struct that stores the actual time
	MAX_BW_LIMIT	Bandwitdh limit (kbps)

Returns:

Number of miliseconds that the thread should wait until new data is readed from the remote server. -1 is returned if there is no enough information to calculate bandwidth.

Definition at line 72 of file IoFunctions.cpp.

References __uint64, and MAX_CHECK_TIME_FOR_BW_UTILIZATION.

Referenced by ReadHTTPResponseData().

PHTTP_DATA ReadHTTPResponseData	(	STABLISHED_CONNECTION *	conexion,
		PHTTP_DATA	request,
		void *	lock
	)

This function reads an HTTP response stream from the remote webserver.

Parameters:

	conexion	struct returned by GetSocketConnection that includes the information of the remote host and valid socket.
	request	HTTP request that was sent before. This param is needed to resend the request
	lock	mutext used for exclusive access

Returns:

pointer to a HTTP_DATA Struct with the HTTP Response or NULL if the remote host can not be reached.

Definition at line 154 of file IoFunctions.cpp.

References _HTTPmapping_struct_::BufferedFileName, _HTTPmapping_struct_::BufferedPtr, BUFFSIZE, conexiones::BwLimit, conexiones::ConnectionAgainstProxy, _data::Data, _data::DataSize, conexiones::datasock, DWORD, FreeConnection(), GetFileMapping(), GetHeaderValue(), gettimeofday(), _data::Header, _data::HeaderSize, _HTTPmapping_struct_::hMapping, _HTTPmapping_struct_::hTmpFilename, InitHTTPData(), conexiones::io, LimitIOBandwidth(), conexiones::lock, LockMutex(), MAX_CHUNK_LENGTH, conexiones::NeedSSL, conexiones::NumberOfRequests, conexiones::PENDING_PIPELINE_REQUESTS, conexiones::PIPELINE_Request, READ_TIMEOUT, ReadHTTPResponseData(), RemovePipeLineRequest(), SendHTTPRequestData(), StablishConnection(), strnicmp, conexiones::tlastused, and UnLockMutex().

Referenced by ReadHTTPResponseData().

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int SendHTTPRequestData	(	STABLISHED_CONNECTION *	conexion,
		PHTTP_DATA	request
	)

This function sends an HTTP request to the remote webserver. a CONEXION struct with initialized sockets. If the connection was previously initialized that struct will be resused.

Parameters:

	conexion	struct returned by GetSocketConnection that includes the information of the remote host and valid socket.
	request	HTTP request verbs and data to be delivered to the remote HTTP Server

Returns:

If there is no error, 1 is returned.

Note:

This Function only sends data, handling the responses from the HTTP server is done outside.

Definition at line 106 of file IoFunctions.cpp.

References _data::Data, _data::DataSize, conexiones::datasock, _data::Header, _data::HeaderSize, conexiones::NeedSSL, conexiones::port, and conexiones::targetDNS.

Referenced by FreeConnection(), and ReadHTTPResponseData().

int StablishConnection

(

STABLISHED_CONNECTION *

connection

)

This function stablishes a connection against a remote host.

Parameters:

connection

CONEXION struct returned by a previous call to GetSocketConnection

Returns:

If the remote connection can be stablished, 1 is returned otherwise, an error is signaled with 0

Definition at line 699 of file IoFunctions.cpp.

Referenced by FreeConnection(), GetSocketConnection(), and ReadHTTPResponseData().

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Variable Documentation

HTTPIOMapping HTTPIoMappingData[MAXIMUM_OPENED_HANDLES]

Definition at line 5 of file IoFunctions.cpp.

CRITICAL_SECTION IoMappingLock

Definition at line 10 of file IoFunctions.cpp.

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