rtems_util.c

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/*************************************************************************\
* Copyright (c) 2002 The University of Saskatchewan
* EPICS BASE Versions 3.13.7
* and higher are distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
/*
 * RTEMS utilitiy routines for EPICS
 *      Author: W. Eric Norum
 *              eric@cls.usask.ca
 *              (306) 966-6055
 *
 * Supplies routines that are present in vxWorks but missing in RTEMS.
 */

#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>

/*
 * Like connect(), but with an explicit timeout
 */
int connectWithTimeout (int sfd,
                        struct sockaddr *addr,
                        int addrlen,
                        struct timeval *timeout)
{
    struct timeval sv;
    socklen_t svlen = sizeof sv;
    int ret;

    if (!timeout)
        return connect (sfd, addr, addrlen);
    if (getsockopt (sfd, SOL_SOCKET, SO_RCVTIMEO, (char *)&sv, &svlen) < 0)
        return -1;
    if (setsockopt (sfd, SOL_SOCKET, SO_RCVTIMEO, (char *)timeout, sizeof *timeout) < 0)
        return -1;
    ret = connect (sfd, addr, addrlen);
    setsockopt (sfd, SOL_SOCKET, SO_RCVTIMEO, (char *)&sv, sizeof sv);
    return ret;
}