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 ost::Socket.
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 &)

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::disconnect (void): Disconnect the current session and prepare for a new one.; Reimplemented in ost::SSLStream.; Examples:
tcp.cpp, and tcpstr1.cpp.
int ost::TCPStream::getSegmentSize (void): Get protocol segment size.; Examples:
tcp.cpp.
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::endStream (void) [protected]: Used to terminate the buffer space and cleanup the socket connection.; This fucntion is called by the destructor.; Reimplemented in ost::SSLStream.
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.; Reimplemented in ost::URLStream.
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::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.
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 (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
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.
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::setTimeout (timeout_t timer) [inline]: Set the I/O operation timeout for socket I/O operations.; Parameters:
timer to change timeout.; Reimplemented in ost::URLStream.
int ost::TCPStream::sync (void): Flushes the stream input and output buffers, writes pending output.; Returns:
0 on success.
size_t ost::TCPStream::printf (const char * format, ...): Print content into a socket.; Returns:
count of bytes sent.; Parameters:
format string
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.
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.
size_t ost::TCPStream::getBufferSize (void) const [inline]: Return the size of the current stream buffering used.; Returns:
size of stream buffers.

Friends And Related Function Documentation

TCPStream& crlf (TCPStream &) [friend] TCPStream& lfcr (TCPStream &) [friend]

Member Data Documentation

timeout_t ost::TCPStream::timeout [protected] size_t ost::TCPStream::bufsize [protected] Family ost::TCPStream::family [protected] char* ost::TCPStream::gbuf [protected] char * ost::TCPStream::pbuf [protected]

Author

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