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

NAME

ost::TCPSocket - TCP sockets are used for stream based connected sessions between two sockets.

SYNOPSIS

#include <socket.h>

Inherits ost::Socket.

Public Member Functions


virtual bool onAccept (const IPV4Host &ia, tpport_t port)
A method to call in a derived TCPSocket class that is acting as a server when a connection request is being accepted. SOCKET getSocket (void)
Fetch out the socket. int getSegmentSize (void)
Get the buffer size for servers. TCPSocket (const IPV4Address &bind, tpport_t port, unsigned backlog=5, unsigned mss=536)
A TCP 'server' is created as a TCP socket that is bound to a hardware address and port number on the local machine and that has a backlog queue to listen for remote connection requests. TCPSocket (const char *name, unsigned backlog=5, unsigned mss=536)
Create a named tcp socket by service and/or interface id. IPV4Host getRequest (tpport_t *port=NULL) const
Return address and port of next connection request. void reject (void)
Used to reject the next incoming connection request. IPV4Host getLocal (tpport_t *port=NULL) const
Used to get local bound address. bool isPendingConnection (timeout_t timeout=TIMEOUT_INF)
Used to wait for pending connection requests. virtual ~TCPSocket ()
Use base socket handler for ending this socket.

Protected Member Functions


void setSegmentSize (unsigned mss)

Protected Attributes


int segsize

Additional Inherited Members

Detailed Description

TCP sockets are used for stream based connected sessions between two sockets.

Both error recovery and flow control operate transparently for a TCP socket connection. The TCP socket base class is primary used to bind a TCP 'server' for accepting TCP streams.

An implicit and unique TCPSocket object exists in Common C++ to represent a bound TCP socket acting as a 'server' for receiving connection requests. This class is not part of TCPStream because such objects normally perform no physical I/O (read or write operations) other than to specify a listen backlog queue and perform 'accept' operations for pending connections. The Common C++ TCPSocket offers a Peek method to examine where the next pending connection is coming from, and a Reject method to flush the next request from the queue without having to create a session.

The TCPSocket also supports a 'OnAccept' method which can be called when a TCPStream related object is created from a TCPSocket. By creating a TCPStream from a TCPSocket, an accept operation automatically occurs, and the TCPSocket can then still reject the client connection through the return status of it's OnAccept method.

Author

David Sugar dyfet@tycho.com

bound server for TCP streams and sessions.

Examples
tcp.cpp, tcpservice.cpp, tcpstr1.cpp, and tcpthread.cpp.

Constructor & Destructor Documentation

ost::TCPSocket::TCPSocket (const IPV4Address & bind, tpport_t port, unsigned backlog = 5, unsigned mss = 536)

A TCP 'server' is created as a TCP socket that is bound to a hardware address and port number on the local machine and that has a backlog queue to listen for remote connection requests. If the server cannot be created, an exception is thrown.

Parameters

bind local ip address or interface to use.
port number to bind socket under.
backlog size of connection request queue.
mss maximum segment size for accepted streams.

ost::TCPSocket::TCPSocket (const char * name, unsigned backlog = 5, unsigned mss = 536)

Create a named tcp socket by service and/or interface id. For IPV4 we use [host:]svc or [host/]svc for the string. If we have getaddrinfo, we use that to obtain the addr to bind for.

Parameters

name of host interface and service port to bind.
backlog size of connection request queue.
mss maximum segment size for streaming buffers.

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

Use base socket handler for ending this socket.

Member Function Documentation

IPV4Host ost::TCPSocket::getLocal (tpport_t * port = NULL) const [inline]

Used to get local bound address.

References ost::Socket::getIPV4Local().

IPV4Host ost::TCPSocket::getRequest (tpport_t * port = NULL) const [inline]

Return address and port of next connection request. This can be used instead of OnAccept() to pre-evaluate connection requests.

Returns

host requesting a connection.

Parameters

port number of requestor.

References ost::Socket::getIPV4Sender().

int ost::TCPSocket::getSegmentSize (void) [inline]

Get the buffer size for servers.

SOCKET ost::TCPSocket::getSocket (void) [inline]

Fetch out the socket.

bool ost::TCPSocket::isPendingConnection (timeout_t timeout = TIMEOUT_INF) [inline]

Used to wait for pending connection requests.

Returns

true if data packets available.

Parameters

timeout in milliseconds. TIMEOUT_INF if not specified.

Examples
tcpstr1.cpp, and tcpthread.cpp.

References ost::Socket::isPending(), and ost::Socket::pendingInput.

virtual bool ost::TCPSocket::onAccept (const IPV4Host & ia, tpport_t port) [virtual]

A method to call in a derived TCPSocket class that is acting as a server when a connection request is being accepted. The server can implement protocol specific rules to exclude the remote socket from being accepted by returning false. The Peek method can also be used for this purpose.

Returns

true if client should be accepted.

Parameters

ia internet host address of the client.
port number of the client.

void ost::TCPSocket::reject (void)

Used to reject the next incoming connection request.

void ost::TCPSocket::setSegmentSize (unsigned mss) [protected]

Member Data Documentation

int ost::TCPSocket::segsize [protected]

Author

Generated automatically by Doxygen for GNU CommonC++ from the source code.
Sat Dec 28 2019 GNU CommonC++