ucommon
Public Member Functions | Protected Member Functions | Protected Attributes
ost::TCPSocket Class Reference

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

#include <tcp.h>

Inherits ost::Socket.

Public Member Functions

IPV4Host getLocal (tpport_t *port=((void *) 0))
 Used to get local bound address.
IPV4Host getRequest (tpport_t *port=((void *) 0))
 Return address and port of next connection request.
int getSegmentSize (void)
 Get the buffer size for servers.
SOCKET getSocket (void)
 Fetch out the socket.
bool isPendingConnection (timeout_t timeout=ucommon::Timer::inf)
 Used to wait for pending connection requests.
virtual bool onAccept (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.
void reject (void)
 Used to reject the next incoming connection request.
 TCPSocket (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 (char *name, unsigned backlog=5, unsigned mss=536)
 Create a named tcp socket by service and/or interface id.
virtual ~TCPSocket ()
 Use base socket handler for ending this socket.

Protected Member Functions

void setSegmentSize (unsigned mss)

Protected Attributes

int segsize

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.

Definition at line 91 of file tcp.h.


Constructor & Destructor Documentation

ost::TCPSocket::TCPSocket ( 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:
bindlocal ip address or interface to use.
portnumber to bind socket under.
backlogsize of connection request queue.
mssmaximum segment size for accepted streams.
ost::TCPSocket::TCPSocket ( 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:
nameof host interface and service port to bind.
backlogsize of connection request queue.
mssmaximum segment size for streaming buffers.

Member Function Documentation

IPV4Host ost::TCPSocket::getRequest ( tpport_t *  port = ((void *)0)) [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:
portnumber of requestor.

Definition at line 157 of file tcp.h.

Used to wait for pending connection requests.

Returns:
true if data packets available.
Parameters:
timeoutin milliseconds. TIMEOUT_INF if not specified.

Definition at line 176 of file tcp.h.

virtual bool ost::TCPSocket::onAccept ( 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:
iainternet host address of the client.
portnumber of the client.

The documentation for this class was generated from the following file: