fis-gtm/sr_port/iotcp_fillroutine.c

/****************************************************************
 *								*
 *	Copyright 2001, 2010 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

/*  get socket routines address */
#include "mdef.h"

#include "gtm_netdb.h"
#include "gtm_unistd.h"
#include <errno.h>
#include "gtm_socket.h"
#include "gtm_inet.h"
#include "gtm_string.h"	/* for FD_ZERO */

#include "io.h"
#include "iotcp_select.h"
#include "iotcproutine.h"

GBLDEF tcp_library_struct        tcp_routines;

int	gtm_accept(int socket, struct sockaddr *address, sssize_t *address_len);
int	gtm_recv(int socket, void *buffer, size_t length, int flags);
int	gtm_send(int socket, void *buffer, size_t length, int flags);

/*
 * Note - the checks for EINTR in these functions are valid and need to stay in,
 * because the functions are being assigned to members of the tcp_routines table,
 * and thus cannot be replaced by EINTR wrapper macros.
 */

int	gtm_accept(int socket, struct sockaddr *address, sssize_t *address_len)
{
	int res;

	do
	{
		res = accept(socket, address, (GTM_SOCKLEN_TYPE *)address_len);
	} while (-1 == res && EINTR == errno);

	return(res);
}

int	gtm_connect(int socket, struct sockaddr *address, size_t address_len)
{
	int			res, sockerror;
	GTM_SOCKLEN_TYPE	sockerrorlen;
	fd_set			writefds;

	res = connect(socket, address, (GTM_SOCKLEN_TYPE)address_len);
	if ((-1 == res) && ((EINTR == errno) || (EINPROGRESS == errno)
#if (defined(__osf__) && defined(__alpha)) || defined(__sun) || defined(__vms)
			|| (EWOULDBLOCK == errno)
#endif
			 ))
	{/* connection attempt will continue so wait for completion */
		do
		{	/* a plain connect will usually timeout after 75 seconds with ETIMEDOUT */
			FD_ZERO(&writefds);
			FD_SET(socket, &writefds);
			res = select(socket + 1, NULL, &writefds, NULL, NULL);
			if (-1 == res && EINTR == errno)
				continue;
			if (0 < res)
			{	/* check for socket error */
				sockerrorlen = SIZEOF(sockerror);
				res = getsockopt(socket, SOL_SOCKET, SO_ERROR, &sockerror, &sockerrorlen);
				if (0 == res && 0 != sockerror)
				{	/* return socket error */
					res = -1;
					errno = sockerror;
				}
			}
			break;
		} while (TRUE);
	} else if (-1 == res && EISCONN == errno)
		res = 0;		/* socket is already connected */

	return(res);
}

int	gtm_recv(int socket, void *buffer, size_t length, int flags)
{
	int res;

	do
	{
		res = (int)(recv(socket, buffer, (int)(length), flags));
	} while (-1 == res && EINTR == errno);

	return(res);
}

int	gtm_send(int socket, void *buffer, size_t length, int flags)
{
	int res;

	do
	{
		res = (int)(send(socket, buffer, (int)(length), flags));
	} while (-1 == res && EINTR == errno);

	return(res);
}

int	iotcp_fillroutine(void)
{
	if (gtm_accept == tcp_routines.aa_accept)
		return 0;		/* already done */
	tcp_routines.aa_accept = gtm_accept;
	tcp_routines.aa_bind = bind;
	tcp_routines.aa_close = close;
	tcp_routines.aa_connect = gtm_connect;
	tcp_routines.aa_getsockname = getsockname;
	tcp_routines.aa_getsockopt = getsockopt;
#ifndef htons       /* if htons is not a macro, assign the routine */
	tcp_routines.aa_htons = htons;
#endif
	tcp_routines.aa_inet_addr = INET_ADDR;
	tcp_routines.aa_inet_ntoa = INET_NTOA;
#ifndef ntohs
	tcp_routines.aa_ntohs = ntohs;
#endif
	tcp_routines.aa_listen = listen;
	tcp_routines.aa_recv = (int (*)())gtm_recv;
	tcp_routines.aa_select = select;
	tcp_routines.aa_send = (int (*)())gtm_send;
	tcp_routines.aa_setsockopt = setsockopt;
	tcp_routines.aa_socket = socket;

	return 0;
}