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ost::TCPStream(3) Library Functions Manual ost::TCPStream(3)

NAME

ost::TCPStream - TCP streams are used to represent TCP client connections to a server by TCP protocol servers for accepting client connections.

SYNOPSIS

#include <socket.h>

Inherits streambuf, ost::Socket, and iostream.

Inherited by ost::SSLStream, ost::TCPSession, and ost::URLStream.

Public Member Functions


TCPStream (Family family=IPV4, bool throwflag=true, timeout_t to=0)
The constructor required for building other classes or to start an unconnected TCPStream for connect. void disconnect (void)
Disconnect the current session and prepare for a new one. int getSegmentSize (void)
Get protocol segment size. TCPStream (TCPSocket &server, bool throwflag=true, timeout_t timeout=0)
Create a TCP stream by accepting a connection from a bound TCP socket acting as a server. TCPStream (TCPV6Socket &server, bool throwflag=true, timeout_t timeout=0)
void connect (TCPSocket &server)
Accept a connection from a TCP Server. void connect (TCPV6Socket &server)
TCPStream (const IPV4Host &host, tpport_t port, unsigned mss=536, bool throwflag=true, timeout_t timeout=0)
Create a TCP stream by connecting to a TCP socket (on a remote machine). TCPStream (const IPV6Host &host, tpport_t port, unsigned mss=536, bool throwflag=true, timeout_t timeout=0)
TCPStream (const char *name, Family family=IPV4, unsigned mss=536, bool throwflag=false, timeout_t timer=0)
Construct a named TCP Socket connected to a remote machine. void setTimeout (timeout_t timer)
Set the I/O operation timeout for socket I/O operations. TCPStream (const TCPStream &source)
A copy constructor creates a new stream buffer. virtual ~TCPStream ()
Flush and empty all buffers, and then remove the allocated buffers. int sync (void)
Flushes the stream input and output buffers, writes pending output. size_t printf (const char *format,...)
Print content into a socket. bool isPending (Pending pend, timeout_t timeout=TIMEOUT_INF)
Get the status of pending stream data. ssize_t peek (void *buf, size_t len)
Examine contents of next waiting packet. size_t getBufferSize (void) const
Return the size of the current stream buffering used.

Protected Member Functions


void allocate (size_t size)
Used to allocate the buffer space needed for iostream operations. void endStream (void)
Used to terminate the buffer space and cleanup the socket connection. int underflow ()
This streambuf method is used to load the input buffer through the established tcp socket connection. int uflow ()
This streambuf method is used for doing unbuffered reads through the establish tcp socket connection when in interactive mode. int overflow (int ch)
This streambuf method is used to write the output buffer through the established tcp connection. void connect (const IPV4Host &host, tpport_t port, unsigned mss=536)
Create a TCP stream by connecting to a TCP socket (on a remote machine). void connect (const IPV6Host &host, tpport_t port, unsigned mss=536)
void connect (const char *name, unsigned mss=536)
Connect a TCP stream to a named destination host and port number, using getaddrinfo interface if available. std::iostream * tcp (void)
Used in derived classes to refer to the current object via it's iostream.

Protected Attributes


timeout_t timeout
size_t bufsize
Family family
char * gbuf
char * pbuf

Friends


TCPStream & crlf (TCPStream &)
TCPStream & lfcr (TCPStream &)

Additional Inherited Members

Detailed Description

TCP streams are used to represent TCP client connections to a server by TCP protocol servers for accepting client connections.

The TCP stream is a C++ 'stream' class, and can accept streaming of data to and from other C++ objects using the << and >> operators.

TCPStream itself can be formed either by connecting to a bound network address of a TCP server, or can be created when 'accepting' a network connection from a TCP server.

Author

David Sugar dyfet@ostel.com

streamable TCP socket connection.

Examples
tcp.cpp, and tcpstr1.cpp.

Constructor & Destructor Documentation

ost::TCPStream::TCPStream (Family family = IPV4, bool throwflag = true, timeout_t to = 0)

The constructor required for building other classes or to start an unconnected TCPStream for connect.

ost::TCPStream::TCPStream (TCPSocket & server, bool throwflag = true, timeout_t timeout = 0)

Create a TCP stream by accepting a connection from a bound TCP socket acting as a server. This performs an 'accept' call.

Parameters

server socket listening
throwflag flag to throw errors.
timeout for all operations.

ost::TCPStream::TCPStream (TCPV6Socket & server, bool throwflag = true, timeout_t timeout = 0)

ost::TCPStream::TCPStream (const IPV4Host & host, tpport_t port, unsigned mss = 536, bool throwflag = true, timeout_t timeout = 0)

Create a TCP stream by connecting to a TCP socket (on a remote machine).

Parameters

host address of remote TCP server.
port number to connect.
mss maximum segment size of streaming buffers.
throwflag flag to throw errors.
timeout for all operations.

ost::TCPStream::TCPStream (const IPV6Host & host, tpport_t port, unsigned mss = 536, bool throwflag = true, timeout_t timeout = 0)

ost::TCPStream::TCPStream (const char * name, Family family = IPV4, unsigned mss = 536, bool throwflag = false, timeout_t timer = 0)

Construct a named TCP Socket connected to a remote machine.

Parameters

name of remote service.
family of protocol.
mss maximum segment size of streaming buffers.
throwflag flag to throw errors.
timer for timeout for all operations.

ost::TCPStream::TCPStream (const TCPStream & source)

A copy constructor creates a new stream buffer.

Parameters

source reference of stream to copy from.

virtual ost::TCPStream::~TCPStream () [virtual]

Flush and empty all buffers, and then remove the allocated buffers.

Member Function Documentation

void ost::TCPStream::allocate (size_t size) [protected]

Used to allocate the buffer space needed for iostream operations. This function is called by the constructor.

Parameters

size of stream buffers from constructor.

void ost::TCPStream::connect (const char * name, unsigned mss = 536) [protected]

Connect a TCP stream to a named destination host and port number, using getaddrinfo interface if available.

Parameters

name of host and service to connect
mss maximum segment size of stream buffer

void ost::TCPStream::connect (const IPV4Host & host, tpport_t port, unsigned mss = 536) [protected]

Create a TCP stream by connecting to a TCP socket (on a remote machine).

Parameters

host address of remote TCP server.
port number to connect.
mss maximum segment size of streaming buffers.

Examples
tcp.cpp.

void ost::TCPStream::connect (const IPV6Host & host, tpport_t port, unsigned mss = 536) [protected]

void ost::TCPStream::connect (TCPSocket & server)

Accept a connection from a TCP Server.

Parameters

server socket listening

void ost::TCPStream::connect (TCPV6Socket & server)

void ost::TCPStream::disconnect (void)

Disconnect the current session and prepare for a new one.

Examples
tcp.cpp, and tcpstr1.cpp.

void ost::TCPStream::endStream (void) [protected]

Used to terminate the buffer space and cleanup the socket connection. This fucntion is called by the destructor.

size_t ost::TCPStream::getBufferSize (void) const [inline]

Return the size of the current stream buffering used.

Returns

size of stream buffers.

int ost::TCPStream::getSegmentSize (void)

Get protocol segment size.

Examples
tcp.cpp.

bool ost::TCPStream::isPending (Pending pend, timeout_t timeout = TIMEOUT_INF) [virtual]

Get the status of pending stream data. This can be used to examine if input or output is waiting, or if an error or disconnect has occured on the stream. If a read buffer contains data then input is ready and if write buffer contains data it is first flushed and then checked.

Reimplemented from ost::Socket.

Examples
tcp.cpp.

int ost::TCPStream::overflow (int ch) [protected]

This streambuf method is used to write the output buffer through the established tcp connection.

Parameters

ch char to push through.

Returns

char pushed through.

ssize_t ost::TCPStream::peek (void * buf, size_t len) [inline]

Examine contents of next waiting packet.

Parameters

buf pointer to packet buffer for contents.
len of packet buffer.

Returns

number of bytes examined.

References _IOLEN64.

size_t ost::TCPStream::printf (const char * format, ...)

Print content into a socket.

Returns

count of bytes sent.

Parameters

format string

void ost::TCPStream::setTimeout (timeout_t timer) [inline]

Set the I/O operation timeout for socket I/O operations.

Parameters

timer to change timeout.

int ost::TCPStream::sync (void)

Flushes the stream input and output buffers, writes pending output.

Returns

0 on success.

std::iostream* ost::TCPStream::tcp (void) [inline], [protected]

Used in derived classes to refer to the current object via it's iostream. For example, to send a set of characters in a derived method, one might use *tcp() << 'test'.

Returns

stream pointer of this object.

int ost::TCPStream::uflow () [protected]

This streambuf method is used for doing unbuffered reads through the establish tcp socket connection when in interactive mode. Also this method will handle proper use of buffers if not in interative mode.

Returns

char from tcp socket connection, EOF if not connected.

int ost::TCPStream::underflow () [protected]

This streambuf method is used to load the input buffer through the established tcp socket connection.

Returns

char from get buffer, EOF if not connected.

Friends And Related Function Documentation

TCPStream& crlf (TCPStream &) [friend]

TCPStream& lfcr (TCPStream &) [friend]

Member Data Documentation

size_t ost::TCPStream::bufsize [protected]

Family ost::TCPStream::family [protected]

char* ost::TCPStream::gbuf [protected]

char * ost::TCPStream::pbuf [protected]

timeout_t ost::TCPStream::timeout [protected]

Author

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Sun Dec 27 2020 GNU CommonC++