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// -*- C++ -*-
//=============================================================================
/**
*
* @file SOCK_SEQPACK_Association.h
*
* $Id$
*
* @author Patrick J. Lardieri <plardier@atl.lmco.com>
* @author Gaurav Naik, Lockheed Martin ATL
* @author based on SOCK_Stream
* by Douglas C. Schmidt <schmidt@cs.wustl.edu>
*
*/
//=============================================================================
#ifndef ACE_SOCK_SEQPACK_ASSOCIATION_H
#define ACE_SOCK_SEQPACK_ASSOCIATION_H
#include /**/ "ace/pre.h"
#include /**/ "ace/ACE_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/SOCK_IO.h"
#include "ace/Multihomed_INET_Addr.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
// Forward declarations.
class ACE_Message_Block;
/**
* @class ACE_SOCK_SEQPACK_Association
*
* @brief Defines the methods in the ACE_SOCK_SEQPACK_Association abstraction.
*
* This adds additional wrapper methods atop the <ACE_SOCK_IO>
* class.
*
* @a buf is the buffer to write from or receive into.
* @a len is the number of bytes to transfer.
* The @a timeout parameter in the following methods indicates how
* long to blocking trying to transfer data. If @a timeout == 0,
* then the call behaves as a normal send/recv call, i.e., for
* blocking sockets, the call will block until action is possible;
* for non-blocking sockets, EWOULDBLOCK will be returned if no
* action is immediately possible.
* If @a timeout != 0, the call will wait for data to arrive no longer
* than the relative time specified in *@a timeout.
* The "_n()" I/O methods keep looping until all the data has been
* transferred. These methods also work for sockets in non-blocking
* mode i.e., they keep looping on EWOULDBLOCK. @a timeout is used
* to make sure we keep making progress, i.e., the same timeout
* value is used for every I/O operation in the loop and the timeout
* is not counted down.
* The return values for the "*_n()" methods match the return values
* from the non "_n()" methods and are specified as follows:
* - On complete transfer, the number of bytes transferred is returned.
* - On timeout, -1 is returned, errno == ETIME.
* - On error, -1 is returned, errno is set to appropriate error.
* - On EOF, 0 is returned, errno is irrelevant.
*
* On partial transfers, i.e., if any data is transferred before
* timeout/error/EOF, <bytes_transferred> will contain the number of
* bytes transferred.
* Methods with <iovec> parameter are I/O vector variants of the I/O
* operations.
* Methods with the extra @a flags argument will always result in
* <send> getting called. Methods without the extra @a flags argument
* will result in <send> getting called on Win32 platforms, and
* <write> getting called on non-Win32 platforms.
*/
class ACE_Export ACE_SOCK_SEQPACK_Association : public ACE_SOCK_IO
{
public:
// Initialization and termination methods.
/// Constructor.
ACE_SOCK_SEQPACK_Association (void);
/// Constructor (sets the underlying ACE_HANDLE with <h>).
ACE_SOCK_SEQPACK_Association (ACE_HANDLE h);
/// Destructor.
~ACE_SOCK_SEQPACK_Association (void);
/**
* Return local endpoint addresses in the referenced array of
* ACE_INET_Addr, which should have the specified @a size. If the
* number of local endpoint addresses is less than @a size, then
* @a size will be set to this number. If successful, the method
* returns 0, otherwise returns -1.
*/
int get_local_addrs (ACE_INET_Addr *addrs, size_t &size) const;
/**
* Return remote endpoint addresses in the referenced array of
* ACE_INET_Addr, which should have the specified @a size. If the
* number of remote endpoint addresses is less than @a size, then
* @a size will be set to this number. If successful, the method
* returns 0, otherwise returns -1.
*/
int get_remote_addrs (ACE_INET_Addr *addrs, size_t &size) const;
// = I/O functions.
/// Try to recv exactly @a len bytes into @a buf from the connected socket.
ssize_t recv_n (void *buf,
size_t len,
int flags,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Try to recv exactly @a len bytes into @a buf from the connected socket.
ssize_t recv_n (void *buf,
size_t len,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Receive an <iovec> of size <iovcnt> from the connected socket.
ssize_t recvv_n (iovec iov[],
int iovcnt,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Try to send exactly @a len bytes from @a buf to the connection socket.
ssize_t send_n (const void *buf,
size_t len,
int flags,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Try to send exactly @a len bytes from @a buf to the connected socket.
ssize_t send_n (const void *buf,
size_t len,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Send all the @a message_blocks chained through their <next> and
/// <cont> pointers. This call uses the underlying OS gather-write
/// operation to reduce the domain-crossing penalty.
ssize_t send_n (const ACE_Message_Block *message_block,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
/// Send an <iovec> of size <iovcnt> to the connected socket.
ssize_t sendv_n (const iovec iov[],
int iovcnt,
const ACE_Time_Value *timeout = 0,
size_t *bytes_transferred = 0) const;
// = Send/receive ``urgent'' data (see TCP specs...).
ssize_t send_urg (const void *ptr,
size_t len = sizeof (char),
const ACE_Time_Value *timeout = 0) const;
ssize_t recv_urg (void *ptr,
size_t len = sizeof (char),
const ACE_Time_Value *timeout = 0) const;
// = Selectively close endpoints.
/// Close down the reader.
int close_reader (void);
/// Close down the writer.
int close_writer (void);
/**
* Close down the socket (we need this to make things work correctly
* on Win32, which requires use to do a <close_writer> before doing
* the close to avoid losing data). */
int close (void);
/**
* Abort the association according to RFC 2960 9.1 through the API
* in draft-ietf-tsvwg-sctpsocket-09 7.1.4.
*/
int abort (void);
// = Meta-type info
typedef ACE_Multihomed_INET_Addr PEER_ADDR;
/// Dump the state of an object.
void dump (void) const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
};
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/SOCK_SEQPACK_Association.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_SOCK_SEQPACK_ASSOCIATION_H */
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